Battery shell, battery pack and energy storage device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery shell, a battery pack and an energy storage device, and the battery shell comprises a lower shell, an upper shell and a magnetic connecting assembly; the lower shell is provided with a lower flange plate; the upper shell is provided with an upper flange plate; the magnetic connecting assembly is installed between the lower flange plate and the upper flange plate and used for connecting the lower flange plate and the upper flange plate. Compared with a traditional battery shell, the battery shell has the advantages that the upper shell and the lower shell are fixedly connected without using more bolts and nuts, so that the problem that the connection stability is reduced due to torsion attenuation caused by the fact that the nuts are in a vibration state for a long time is avoided, the phenomenon of screw loose of the bolts is avoided, and the waste of materials is reduced; the takt of an assembly production line and the takt of reworking and dismounting are improved, and the dismounting difficulty and dismounting cost during reworking are reduced. And meanwhile, the highest-grade waterproof and dustproof requirements of the battery shell can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery shell, a battery pack and an energy storage device. Background Art

[0002] As the core component of the battery pack, the battery case protects the battery cells, wiring harnesses, structural parts, etc. The traditional battery case includes an upper shell and a lower shell, which are detachably connected by a large number of bolts, resulting in low disassembly efficiency of the traditional battery case. Utility Model Content

[0003] The utility model provides a battery shell, a battery pack and an energy storage device, which are used to solve the problem of low efficiency in disassembling and assembling traditional battery shells.

[0004] In one aspect, the utility model provides a battery case, comprising:

[0005] The lower housing is provided with a lower flange;

[0006] The upper shell is provided with an upper flange;

[0007] The magnetic connection component is installed between the lower flange and the upper flange and is used to connect the lower flange and the upper flange.

[0008] In some embodiments, the magnetic connection assembly includes:

[0009] The lower magnet is fixedly mounted on the lower flange;

[0010] The upper magnet has a polarity opposite to that of the lower magnet and is fixedly mounted on the upper flange.

[0011] In some of the embodiments, a positioning protrusion is provided on the lower magnet, and a positioning hole matching the positioning protrusion is provided on the upper magnet;

[0012] Alternatively, a positioning hole is provided on the lower magnet, and a positioning protrusion matched with the positioning hole is provided on the upper magnet.

[0013] In some of these embodiments, the lower magnet is a rectangular structure;

[0014] And / or, the upper magnet is a rectangular structure.

[0015] In some embodiments, the lower magnet is bonded to the lower flange;

[0016] And / or, the upper magnet is bonded to the upper flange.

[0017] In some of the embodiments, a magnetic sheet is mounted on the upper flange.

[0018] In some of the embodiments, the magnetic sheet is pre-embedded or pre-insulated in the upper flange.

[0019] In some embodiments, the upper flange is formed by stacking multiple resin layers, and a magnetic sheet is sandwiched between every two adjacent resin layers.

[0020] On the other hand, the utility model provides a battery pack, comprising the battery shell provided by any of the above embodiments.

[0021] On the other hand, the utility model provides an energy storage device, including the battery shell provided by any of the above embodiments or the battery pack provided by any of the above embodiments.

[0022] The beneficial effects of the utility model are as follows: The battery shell of the utility model is provided with a magnetic connection assembly, and when the battery shell is assembled, the magnetic connection assembly achieves the purpose of rapid assembly of the upper shell and the lower shell. When the battery shell is disassembled, the magnetic connection assembly achieves the purpose of rapid detachment of the upper shell and the lower shell. Compared with the traditional battery shell, a large number of bolts and nuts are no longer used to fix the upper shell and the lower shell, which avoids the problem of torque attenuation caused by the nut being in a vibrating state for a long time, causing the connection stability to decrease, and the phenomenon of bolt slippage will no longer occur, which reduces material waste, improves the rhythm of the assembly production line and the rhythm of rework and disassembly, and reduces the difficulty and cost of disassembly during rework. At the same time, it can meet the highest level of waterproof and dustproof requirements for battery shells. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of some specific embodiments of a battery shell of the utility model;

[0024] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;

[0025] Figure 3 yes Figure 1 Schematic diagram of the combined structure of the lower shell and the lower magnet in some specific embodiments of the battery shell shown;

[0026] Figure 4 yes Figure 1 Schematic diagram of the combined structure of the upper shell and the upper magnet in some specific embodiments of the battery shell shown;

[0027] Figure 5 yes Figure 1 Schematic diagrams of structures of some specific embodiments of magnetic connection components in battery shells shown;

[0028] Figure 6 It is a schematic diagram of the structure of some other specific embodiments of the magnetic connection assembly;

[0029] Figure 7It is a schematic structural diagram of some specific embodiments of the magnetic connection component.

[0030] In the accompanying drawings, 110, upper shell; 111, upper flange; 120, lower shell; 121, lower flange; 130, magnetic connection assembly; 131, lower magnet; 1311, positioning protrusion; 132, upper magnet; 1321, positioning hole. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] As described in the background art, a conventional battery case includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected by a large number of bolts, resulting in low disassembly and assembly efficiency of the conventional battery case.

[0033] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 On the one hand, the utility model provides a battery shell, including a lower shell 120, an upper shell 110 and a magnetic connection assembly 130. The lower shell 120 is provided with a lower flange 121. The upper shell 110 is provided with an upper flange 111. The upper flange 111 and the lower flange 121 increase the contact area when the upper shell 110 is connected to the lower shell 120, thereby improving the stability of the connection. The magnetic connection assembly 130 is installed between the lower flange 121 and the upper flange 111, and is used to connect the lower flange 121 and the upper flange 111. When assembling the battery shell, the magnetic connection assembly 130 achieves the purpose of rapid assembly of the upper shell 110 and the lower shell 120. When disassembling the battery shell, the magnetic connection assembly 130 achieves the purpose of rapid detachment of the upper shell 110 and the lower shell 120. Compared with the traditional battery case, the upper shell 110 and the lower shell 120 are no longer connected with many bolts and nuts, which avoids the problem of torque attenuation caused by the nut being in a vibrating state for a long time, resulting in a decrease in the stability of the connection. The bolts no longer slip, which reduces material waste, improves the assembly line beat and the rework and disassembly beat, and reduces the difficulty and cost of disassembly during rework. At the same time, it can meet the highest level of waterproof and dustproof requirements for battery cases.

[0034] In some embodiments, the magnetic connection assembly 130 includes a lower magnet 131 and an upper magnet 132. The lower magnet 131 is fixedly mounted on the lower flange 121. The upper magnet 132 is fixedly mounted on the upper flange 111. The polarity of the upper magnet 132 is opposite to that of the lower magnet 131, and has a mutual attraction with the upper magnet 132. With the help of the lower magnet 131 and the upper magnet 132, the upper flange 111 and the lower flange 121 can be quickly disassembled and assembled, thereby improving the disassembly and assembly efficiency of the upper shell 110 and the lower shell 120.

[0035] In other embodiments, the magnetic connection assembly 130 only includes a lower magnet 131. The lower magnet 131 is fixedly mounted on the lower flange 121. The upper flange 111 or the upper shell 110 is made of ferromagnetic materials such as iron, nickel or cobalt. The lower magnet 131 can attract the upper flange 111 or the upper shell 110, so that the upper shell 110 and the lower shell 120 can be quickly disassembled.

[0036] In some other embodiments, the magnetic connection assembly 130 only includes an upper magnet 132. The upper magnet 132 is fixedly mounted on the upper flange 111. The lower flange 121 or the lower shell 120 is made of ferromagnetic materials such as iron, nickel or cobalt. The upper magnet 132 can attract the lower flange 121 or the lower shell 120, so that the upper shell 110 and the lower shell 120 can be quickly disassembled.

[0037] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the lower magnet 131 is fixedly mounted on the top surface of the lower flange 121 by adhesive tape. And / or, the upper magnet 132 is fixedly mounted on the bottom surface of the upper flange 111 by adhesive tape. In this way, the lower magnet 131 and the lower housing 120 and the upper magnet 132 and the upper housing 110 can be easily assembled and disassembled.

[0038] In other embodiments, a lower receiving groove is provided on the top surface of the lower flange 121. The lower magnet 131 is embedded in the lower receiving groove. An upper receiving groove is provided on the bottom surface of the upper flange 111. The upper magnet 132 is embedded in the upper receiving groove. In this way, the flange can protect the magnet, extend the service life of the magnet, and improve space utilization.

[0039] In some embodiments, such as Figure 5 As shown, the lower magnet 131 is a rectangular structure. And / or, the upper magnet 132 is a rectangular structure. In this way, the contact area between the lower magnet 131 and the upper magnet 132 is effectively increased, which helps to improve the stability of the connection and ensure the waterproof and dustproof level of the connection.

[0040] In other embodiments, the lower magnet 131 is in block or strip shape, and / or the upper magnet 132 is in block or strip shape, so as to reduce the use of magnet materials and reduce the processing and manufacturing cost.

[0041] In some embodiments, a positioning protrusion 1311 is provided on the lower magnet 131, and a positioning hole 1321 matching the positioning protrusion 1311 is provided on the upper magnet 132. Alternatively, a positioning hole is provided on the lower magnet 131, and a positioning protrusion matching the positioning hole is provided on the upper magnet 132. During disassembly and assembly, the positioning protrusion 1311 and the positioning hole 1321 play a positioning role, further improving the disassembly and assembly efficiency.

[0042] Preferably, if Figure 6 or Figure 7 As shown, the four sides of the lower magnet 131 are respectively provided with positioning protrusions 1311 or positioning holes. Correspondingly, the four sides of the upper magnet 132 are respectively provided with positioning holes 1321 or positioning protrusions. Compared with the form of only providing the positioning protrusion 1311 or the positioning hole 1321 on one side, it is more conducive to positioning and installation.

[0043] It should be noted that for some battery shells, the lower shell 120 is made of aluminum and the upper shell 110 is made of multiple layers of resin. A magnetic sheet is installed on the upper flange 111. The material of the magnetic sheet is a ferromagnetic material such as iron, nickel or cobalt. The magnet has an attraction to the magnetic sheet, which can further improve the stability of the connection between the upper flange 111 and the lower flange 121.

[0044] In some of the embodiments, the magnetic sheet is pre-buried in the upper flange 111 , which can effectively extend the service life of the magnetic sheet.

[0045] In other embodiments, the magnetic sheet can be detachably mounted on the top surface or the bottom surface of the upper flange 111 to facilitate the assembly and disassembly of the magnetic sheet.

[0046] In some other embodiments, the magnetic sheet is pre-embedded in the upper flange 111, which saves the space occupied by the magnetic sheet, prolongs the service life of the magnetic sheet, and facilitates the disassembly and assembly of the magnetic sheet.

[0047] In fact, the upper flange is made of multiple layers of resin. In order to further improve the stability of the connection, a magnetic sheet is sandwiched between each two adjacent resin layers. Each magnetic sheet has a rectangular structure.

[0048] On the other hand, the utility model also provides a battery pack, including the battery shell provided by any of the above embodiments. When assembling the battery pack, the magnetic connection assembly 130 achieves the purpose of rapid assembly of the upper shell 110 and the lower shell 120. When disassembling the battery pack, the magnetic connection assembly 130 achieves the purpose of rapid detachment of the upper shell 110 and the lower shell 120. Compared with the traditional battery pack, a large number of bolts and nuts are no longer used to fix the upper shell 110 and the lower shell 120, which avoids the problem of torque attenuation caused by the nut being in a vibrating state for a long time, causing the connection stability to decrease, and the phenomenon of bolt slippage no longer occurs, which reduces material waste, improves the rhythm of the assembly production line and the rhythm of rework and disassembly, and reduces the difficulty and cost of disassembly during rework. At the same time, it can meet the highest level of waterproof and dustproof requirements for battery shells.

[0049] On the other hand, the utility model also provides an energy storage device, including the battery shell or battery pack provided by any of the above embodiments.

[0050] In the description of the present invention, 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 invention 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 invention.

[0051] 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 the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In the present invention, 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0053] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery case, characterized in that: include: The lower housing is provided with a lower flange; The upper shell is provided with an upper flange; The magnetic connection component is installed between the lower flange and the upper flange, and is used to connect the lower flange and the upper flange.

2. The battery case according to claim 1, characterized in that: The magnetic connection assembly comprises: A lower magnet is fixedly mounted on the lower flange; The upper magnet has a polarity opposite to that of the lower magnet and is fixedly mounted on the upper flange.

3. The battery case according to claim 2, characterized in that: The lower magnet is provided with a positioning protrusion, and the upper magnet is provided with a positioning hole matched with the positioning protrusion; Alternatively, a positioning hole is provided on the lower magnet, and a positioning protrusion matched with the positioning hole is provided on the upper magnet.

4. The battery case according to claim 2, characterized in that: The lower magnet is a rectangular structure; And / or, the upper magnet is a rectangular structure.

5. The battery case according to claim 2, characterized in that: The lower magnet is bonded to the lower flange; And / or, the upper magnet is bonded to the upper flange.

6. The battery case according to any one of claims 1 to 5, characterized in that: A magnetic sheet is installed on the upper flange.

7. The battery case according to claim 6, characterized in that: The magnetic sheet is pre-buried or pre-embedded in the upper flange.

8. The battery case according to claim 7, characterized in that: The upper flange is formed by stacking multiple resin layers, and a layer of the magnetic sheet is sandwiched between every two adjacent resin layers.

9. A battery pack, characterized in that: A battery case comprising the battery case according to any one of claims 1 to 8.

10. An energy storage device, characterized in that: Comprising the battery case according to any one of claims 1 to 8 or the battery pack according to claim 9.

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