Shell of battery, battery and electric equipment

Abstract

The utility model discloses a shell of a battery, the battery and electric equipment. The shell of the battery comprises a first metal layer and a second metal layer, a fiber layer; a buffer layer; the first metal layer, the fiber layer, the buffer layer and the second metal layer are sequentially arranged, the buffer layer is arranged between the first metal layer and the fiber layer, and / or the buffer layer is arranged between the second metal layer and the fiber layer. By arranging the first metal layer, the fiber layer, the buffer layer and the second metal layer, the structural strength of the shell of the battery can be improved by utilizing the first metal layer and the second metal layer, so that the deformation of the shell of the battery under external force is reduced, and the fiber layer can prevent the second metal layer from being broken; and the buffer layer can improve the buffer effect between the fiber layer and the first metal layer and between the fiber layer and the second metal layer, so that the battery cell can be better protected.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a battery shell, a battery and electrical equipment. Background Art

[0002] In the related art, in order to ensure the structural strength and conductivity of the battery shell, metal materials such as stainless steel and aluminum are usually used. However, when the battery is impacted by external force, the battery shell is prone to deformation and damage, and in severe cases, the pole piece may be pierced, causing a short circuit and fire. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery shell, which can better protect the battery core.

[0004] The utility model further provides a battery.

[0005] The utility model further provides an electrical device.

[0006] According to the battery shell of the utility model, it includes: a first metal layer; a fiber layer; a buffer layer; a second metal layer, the first metal layer, the fiber layer, the buffer layer and the second metal layer are arranged in sequence, the buffer layer is arranged between the first metal layer and the fiber layer, and / or the buffer layer is arranged between the second metal layer and the fiber layer.

[0007] According to the battery shell of the utility model, by providing a first metal layer, a fiber layer, a buffer layer and a second metal layer, the first metal layer and the second metal layer can be used to improve the structural strength of the battery shell, thereby reducing the deformation of the battery shell when subjected to external force, and the fiber layer can prevent the second metal layer from breaking, thereby avoiding short circuits and fires in the battery cells, and the buffer layer can enhance the buffering effect between the fiber layer and the first metal layer, and between the fiber layer and the second metal layer, thereby better protecting the battery cells.

[0008] In some examples of the present invention, the fiber layer is a mesh structure, and the buffer layer is a mesh structure.

[0009] In some examples of the present invention, the porosity of the fiber layer is P1, the porosity of the buffer layer is P2, and the value ranges of P1 and P2 are: 20%≤P1≤80%, 20%≤P2≤90%.

[0010] In some examples of the present invention, the first metal layer is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer and a titanium alloy layer; the second metal layer is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer and a titanium alloy layer.

[0011] In some examples of the present invention, the thickness of the first metal layer and the second metal layer is a, and the value range of a is: 10um≤a≤1000um.

[0012] In some examples of the present invention, the fiber layer is at least one of a nylon layer, a silk fiber layer, a protein fiber layer and a titanium dioxide fiber layer.

[0013] In some examples of the present invention, the thickness of the fiber layer is b, and the value range of b is: 1um≤b≤200um.

[0014] In some examples of the present invention, the buffer layer is a glue layer.

[0015] In some examples of the present invention, the adhesive layer is at least one of a silicone layer, a hydrogel layer and a polyvinylidene fluoride adhesive layer.

[0016] In some examples of the present invention, the thickness of the buffer layer is c, and the value range of c is: 0.1um≤c≤100um.

[0017] In some examples of the present invention, a plurality of the fiber layers and a plurality of the buffer layers are provided, and the plurality of the fiber layers and the plurality of the buffer layers are alternately provided.

[0018] A battery according to an embodiment of the utility model comprises: a battery cell; and a shell of the battery described above, wherein the shell is arranged on the outer side of the battery cell.

[0019] In some examples of the present invention, in a direction away from the battery core, the first metal layer, the fiber layer, the buffer layer, and the second metal layer are stacked.

[0020] The electrical equipment according to the utility model comprises: the battery housing or the battery as described above.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a first cross-sectional view of a battery housing according to an embodiment of the utility model;

[0024] Figure 2 is a second cross-sectional view of a battery housing according to an embodiment of the utility model;

[0025] Figure 3 is an exploded view of a battery housing according to an embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the fiber layer.

[0027] Reference numerals:

[0028] 1. Battery casing;

[0029] 10. First metal layer; 20. Fiber layer; 30. Buffer layer; 40. Second metal layer. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0031] Reference below Figure 1-Figure 4 The battery shell 1 according to the embodiment of the utility model is described, comprising: a first metal layer 10, a fiber layer 20, a buffer layer 30 and a second metal layer 40. Among them, the first metal layer 10 and the second metal layer 40 mainly play a supporting role, which can provide support for the battery shell 1, thereby improving the structural strength of the battery shell 1. The fiber layer 20 mainly plays a bonding and buffering role, which can protect the battery cell. The buffer layer 30 mainly plays a buffering role.

[0032] like Figure 1 As shown, in the direction away from the battery core, the first metal layer 10, the fiber layer 20, the buffer layer 30 and the second metal layer 40 are stacked in sequence. That is to say, the second metal layer 40 is the outermost side of the battery shell. Since the second metal layer 40 has a high structural strength, such a configuration is more reasonable. When the battery shell 1 is subjected to external impact, the second metal layer 40 can better block the impact force and reduce the deformation of the shell, thereby protecting the battery core. It should be noted that the second metal layer 40 can also play a role in transmitting electrons.

[0033] The fiber layer 20 is arranged inside the second metal layer 40. In this way, when the external impact force is too large and causes the second metal layer 40 to break, the fiber layer 20 can play the role of bonding the metal fragments, thereby preventing the second metal layer 40 from breaking, avoiding the puncture of the internal battery cell pole pieces and isolation membranes by metal fragments or sharp edges, and causing serious consequences such as short circuit, fire or explosion in the battery, thereby protecting the battery cell.

[0034] The buffer layer 30 is arranged between the fiber layer 20 and the first metal layer 10, and / or the buffer layer 30 is arranged between the fiber layer 20 and the second metal layer 40. In this way, the buffer layer 30 can be used to buffer the fiber layer 20 and the first metal layer 10, and the fiber layer 20 and the second metal layer 40, so that the arrangement between the fiber layer 20 and the first metal layer 10, and between the fiber layer 20 and the second metal layer 40 can be made more stable and reliable, and the fiber layer 20 can better protect the first metal layer 10, the second metal layer 40 and the battery cell.

[0035] Among them, the buffer layer 30 can be a glue layer, so that the buffer layer 30 can be used to bond the fiber layer 20 and the first metal layer 10, as well as the fiber layer 20 and the second metal layer 40 together, so that the connection between the fiber layer 20 and the first metal layer 10, and between the fiber layer 20 and the second metal layer 40 can be more stable, and the fiber layer 20 can better protect the second metal layer 40 and the battery cell.

[0036] In addition, the adhesive layer is at least one of a silicone layer, a hydrogel layer and a polyvinylidene fluoride adhesive layer. That is, the adhesive layer can be any one of the silicone layer, the hydrogel layer and the polyvinylidene fluoride adhesive layer, or a composite of any of them, wherein the composite material can improve the adhesion of the adhesive layer, thereby making the connection between the fiber layer 20 and the first metal layer 10, and between the fiber layer 20 and the second metal layer 40 more reliable and stable.

[0037] The first metal layer 10 is arranged at the position closest to the battery cell. Since the first metal layer 10 also has a high structural strength, such an arrangement is more reasonable. When the battery shell 1 is subjected to external impact, the first metal layer 10, as the last layer structure of the battery shell 1, can provide better structural strength for the shell, thereby further reducing the deformation of the battery shell 1, and further protecting the battery cell.

[0038] Therefore, by setting the first metal layer 10, the fiber layer 20, the buffer layer 30 and the second metal layer 40, the first metal layer 10 and the second metal layer 40 can be used to improve the structural strength of the battery shell 1, thereby reducing the deformation of the battery shell 1 when subjected to external force, and the fiber layer 20 can prevent the second metal layer 40 from breaking, avoiding short circuits and fires in the battery cells, and the buffer layer 30 can enhance the buffering effect between the fiber layer 20 and the first metal layer 10, and between the fiber layer 20 and the second metal layer 40, thereby better protecting the battery cells.

[0039] In addition, if Figure 4 As shown, the fiber layer 20 is a mesh structure, and the buffer layer 30 is a mesh structure. That is to say, both the fiber layer 20 and the buffer layer 30 are mesh structures. This can reduce the weight of the fiber layer 20 and the buffer layer 30, and has a good improvement effect on improving the energy density of the battery and reducing the cost. Moreover, the fiber layer 20 is set to a mesh structure, so that the fiber layer 20 can also play a better buffering role, thereby absorbing and buffering the impact force from the second metal layer 40 and protecting the battery cell.

[0040] It should be noted that the porosity of the fiber layer 20 needs to be greater than or equal to 20%, so that it is easy to process the fiber layer 20, and the porosity of the fiber layer 20 should also be less than or equal to 80%, so as to avoid the holes on the fiber layer 20 being too dense, thereby affecting the structural strength of the fiber layer 20, so that the fiber layer 20 can work better. In addition, the tensile strength of the fiber layer 20 needs to be greater than 60Mpa, and the elongation needs to be greater than 20%.

[0041] Similarly, the porosity of the buffer layer 30 needs to be greater than or equal to 20%, so that it is easy to process the buffer layer 30, and the porosity of the buffer layer 30 must also be less than or equal to 90%, so as to avoid the pores on the buffer layer 30 being too dense, thereby affecting the structural strength of the buffer layer 30, so that the buffer layer 30 can work better.

[0042] Similarly, the buffer layer 30 is set to a mesh structure, so that the buffer layer 30 can also play a better buffering role, thereby absorbing and buffering the impact force from the second metal layer 40, and further protecting the battery cell. Moreover, the mesh buffer layer 30 can disperse the force concentrated on the second metal layer 40, thereby protecting the second metal layer 40, and further protecting the battery cell.

[0043] In addition, the first metal layer 10 is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer, and a titanium alloy layer; the second metal layer 40 is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer, and a titanium alloy layer. In other words, the first metal layer 10 can be any one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer, and a titanium alloy layer, or a composite of any of them, which can improve the structural strength of the first metal, thereby improving the structural strength of the battery shell 1, and then the battery shell 1 can better protect the battery cell.

[0044] It should be noted that the components of the first metal layer 10 and the second metal layer 40 may be the same or different. Moreover, the connection between the first metal layer 10 and the fiber layer 20 and the second metal layer 40 and the buffer layer 30 may be a conventional loading process such as electrodeposition, electroplating, spraying, electrospinning, physical vapor deposition, chemical vapor deposition, etc.

[0045] Similarly, the second metal layer 40 can be any one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer and a titanium alloy layer, or a composite of any of them, wherein the composite material can better improve the structural strength of the second metal, thereby improving the structural strength of the battery shell 1, and then the battery shell 1 can better protect the battery cell.

[0046] Furthermore, the thickness of the first metal layer 10 and the second metal layer 40 is a, and the value range of a is: 10um≤a≤1000um. In other words, the first metal layer 10 and the second metal layer 40 need to meet a certain range, that is, the thickness of the first metal layer 10 and the second metal layer 40 needs to be greater than or equal to 10um, so as to ensure that the first metal layer 10 and the second metal layer 40 have good structural strength, so as to better protect the battery cell. The thickness of the first metal layer 10 and the second metal layer 40 also needs to be less than or equal to 1000um, so as to avoid the thickness of the first metal layer 10 and the second metal layer 40 being too large, resulting in an increase in the volume of the battery shell 1 and an increase in cost.

[0047] Specifically, the fiber layer 20 is at least one of a nylon layer, a silk fiber layer, a protein fiber layer, and a titanium dioxide fiber layer. In other words, the fiber layer 20 can be any one of the nylon layer, the silk fiber layer, the protein fiber layer, and the titanium dioxide fiber layer, or a composite of any of them, wherein the composite material can better improve the strength, fatigue resistance, and toughness of the fiber layer 20, so that the fiber layer 20 can better play a role of buffering and bonding.

[0048] It should be noted that the nylon layer, silk fiber layer, protein fiber layer and titanium dioxide fiber layer can be obtained by conventional polycondensation reaction method, organic synthesis method, template method, hydrothermal reaction method or electrochemical deposition method, and a porous mesh structure is formed by stretching, electrostatic spinning and the like. The nylon layer and silk fiber layer have good tensile properties. As part of the composite layer, they can effectively improve the ductility and toughness of the fiber layer 20. Moreover, it is an insulating component itself and will not bring new short-circuit risk points to the battery housing 1. The raw material is low in cost and the addition method is simple and easy.

[0049] In addition, the thickness of the fiber layer 20 is b, and the value range of b is: 1um≤b≤200um. In other words, the thickness of the fiber layer 20 also needs to meet a certain range, that is, the thickness of the fiber layer 20 needs to be greater than or equal to 1um, so as to ensure that the fiber layer 20 can better play a buffering role, and can better play a bonding role on the second metal layer 40 to prevent the second metal layer 40 from breaking. Moreover, the thickness of the fiber layer 20 also needs to be less than or equal to 200um, so as to avoid the thickness of the fiber layer 20 being too large, and while avoiding the battery shell 1 from being too large, it can better meet the needs of actual working conditions.

[0050] It should be noted that the preparation method of the buffer layer 30 structure includes but is not limited to conventional buffer layer 30 preparation methods such as organic reaction synthesis, photocatalytic synthesis, thermosetting synthesis or electrospinning. As a part of the composite shell, the buffer layer 30 itself has poor conductivity and will not form a new short circuit risk point. Moreover, the characteristics of the buffer layer 30 itself enable it to have the characteristics of dispersing concentrated stress. When the battery is subjected to external force, it plays an important role in dispersing stress. This layer has simple components, low cost, and a simple and easy solution.

[0051] Furthermore, the thickness of the buffer layer 30 is c, and the value range of c is: 0.1um≤c≤100um. In other words, the thickness of the buffer layer 30 needs to meet a certain range, that is, the thickness of the buffer layer 30 needs to be greater than or equal to 0.1um, so that the buffer layer 30 can be guaranteed to have better adhesion, so that the connection between the fiber layer 20 and the second metal layer 40 can be more reliable and stable. Moreover, the thickness of the buffer layer 30 also needs to be less than or equal to 100um, so that the thickness of the buffer layer 30 can be avoided from being too large, and while avoiding the excessive volume of the battery shell 1, it can better meet the needs of actual working conditions.

[0052] Specifically, the cross-sections of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 are all configured in a square shape. In other words, the cross-sections of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 can all be rectangular structures, which can make the structures of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 simpler, easier to process and manufacture, and better adapted to rectangular batteries.

[0053] As an optional embodiment, the cross-sections of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 are all configured as annular rings. That is to say, the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 can all be circular structures, so that the battery housing 1 composed of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 can be better adapted to cylindrical batteries. In this way, the applicability of the battery housing 1 can be improved. Of course, the cross-sections of the first metal layer 10, the fiber layer 20, the buffer layer 30, and the second metal layer 40 can also be configured as other suitable shapes according to actual working conditions.

[0054] In addition, multiple fiber layers 20 and multiple buffer layers 30 are provided, and the multiple fiber layers 20 and the multiple buffer layers 30 are alternately provided. Among them, the fiber layers 20 are provided in multiple layers, so that the fiber layers 20 are provided in multiple layers, so that the fiber layers 20 are provided in multiple layers, and the buffer effect of the battery shell 1 can be improved. Similarly, the buffer layers 30 are provided in multiple layers, so that the buffer layers 30 are provided in multiple layers, and the bonding effect can be improved. Specifically, the multiple fiber layers 20 and the multiple buffer layers 30 are provided in alternate layers, and such a setting is more reasonable, and the connection between the adjacent fiber layers 20 on both sides, and between the fiber layers 20 and the second metal layer 40 can be more firm and stable, so that the structure of the battery shell 1 can be more firm, and the battery cell can be better protected.

[0055] As an optional embodiment, multiple fiber layers 20 and multiple buffer layers 30 may be stacked together, and then the stacked multiple buffer layers 30 may be stacked on the multiple fiber layers 20. Of course, other suitable stacking structures may also be used. The fiber layers 20 and the buffer layers 30 may be arranged alternately in the form of one fiber layer 20 and one buffer layer 30, or may be arranged alternately in an indefinite number, which may be selected according to actual conditions.

[0056] The battery according to the embodiment of the utility model comprises: a battery cell and the battery shell 1 described in the above embodiment, and the shell is arranged on the outside of the battery cell. The battery cell mainly plays the role of storing and releasing electric energy, and can supply power to the corresponding electrical equipment. The battery shell 1 is arranged on the outside of the battery cell, which is more reasonable. The battery shell 1 can withstand the external impact force on the battery cell, realize the protection of the battery cell, and the battery cell can work better.

[0057] The electrical equipment according to the embodiment of the utility model comprises: the battery housing 1 described in the above embodiment or the battery described in the above embodiment.

[0058] 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.

[0059] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery housing (1), characterized in that: include: A first metal layer (10); A fiber layer (20); A buffer layer (30); A second metal layer (40), the first metal layer (10), the fiber layer (20), and the second metal layer (40) are stacked, the buffer layer (30) is arranged between the first metal layer (10) and the fiber layer (20), and / or the buffer layer (30) is arranged between the second metal layer (40) and the fiber layer (20).

2. The battery housing (1) according to claim 1, characterized in that: The fiber layer (20) is a mesh structure, and the buffer layer (30) is a mesh structure.

3. The battery housing (1) according to claim 2, characterized in that: The porosity of the fiber layer (20) is P1, the porosity of the buffer layer (30) is P2, and the value ranges of P1 and P2 are: 20%≤P1≤80%, 20%≤P2≤90%.

4. The battery housing (1) according to claim 1, characterized in that: The first metal layer (10) is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer and a titanium alloy layer; The second metal layer (40) is at least one of an aluminum layer, an aluminum alloy layer, a copper layer, a copper alloy layer, a stainless steel layer, a steel alloy layer and a titanium alloy layer.

5. The battery housing (1) according to claim 1, characterized in that: The thickness of the first metal layer (10) and the second metal layer (40) are each independently a, and the value range of a is: 10um≤a≤1000um.

6. The battery housing (1) according to claim 1, characterized in that: The fiber layer (20) is at least one of a nylon layer, a silk fiber layer, a protein fiber layer and a titanium dioxide fiber layer.

7. The battery housing (1) according to claim 1, characterized in that: The thickness of the fiber layer (20) is b, and the value range of b is: 1um≤b≤200um.

8. The battery housing (1) according to claim 1, characterized in that: The buffer layer (30) is a glue layer.

9. The battery housing (1) according to claim 8, characterized in that: The adhesive layer is at least one of a silicone layer, a hydrogel layer and a polyvinylidene fluoride adhesive layer.

10. The battery housing (1) according to claim 1, characterized in that: The thickness of the buffer layer (30) is c, and the value range of c is: 0.1um≤c≤100um.

11. The battery housing (1) according to claim 1, characterized in that: A plurality of the fiber layers (20) and a plurality of the buffer layers (30) are provided, and the plurality of the fiber layers (20) and the plurality of the buffer layers (30) are alternately arranged.

12. A battery, characterized in that: include: Battery cells; The battery shell (1) according to any one of claims 1 to 11, wherein the shell is arranged on the outside of the battery cell.

13. The battery according to claim 12, characterized in that In a direction away from the battery core, the first metal layer (10), the fiber layer (20), the buffer layer (30), and the second metal layer (40) are stacked.

14. An electrical device, characterized in that: include: The housing (1) of the battery according to any one of claims 1 to 11 or the battery according to any one of claims 12 to 13.

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