Shell for battery pack, battery pack and electric equipment

Abstract

The utility model discloses a shell for a battery pack, the battery pack and electric equipment. In the thickness direction of the shell, the shell for the battery pack comprises a heat insulation layer, a heat insulation layer and a heat insulation layer, the injection molding layer and the heat insulation layer are arranged in a stacked mode, and the injection molding layer and the heat insulation layer are integrally formed in an injection molding mode. According to the shell for the battery pack disclosed by the utility model, the injection molding layer and the heat insulation layer are stacked and are integrally formed by injection molding, so that the heat insulation layer can insulate heat, risks such as burnthrough and open fire exposure are effectively prevented, the safety of the battery pack is favorably improved, and high connection strength and simple manufacturing of the injection molding layer and the heat insulation layer can be ensured; the production efficiency is improved and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a housing for a battery pack, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the battery pack casing cannot meet the requirements for thermal runaway, resulting in poor battery pack safety and potential safety hazards. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a housing for a battery pack that can effectively prevent risks such as burn-through and exposure to open flames, and can improve production efficiency and reduce production costs.

[0004] Another objective of this invention is to provide a battery pack having the aforementioned casing.

[0005] Another objective of this invention is to provide an electrical device having the aforementioned battery pack.

[0006] According to an embodiment of the present invention, a housing for a battery pack includes, in the thickness direction of the housing, a heat insulation layer and an injection molding layer, wherein the injection molding layer and the heat insulation layer are stacked and integrally injection molded together.

[0007] According to the embodiments of the present invention, the housing for the battery pack is formed by stacking an injection molding layer and a heat insulation layer, and the injection molding layer and the heat insulation layer are integrally injection molded. The heat insulation layer can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, which is beneficial to improving the safety of the battery pack. It can also ensure high connection strength between the injection molding layer and the heat insulation layer, simplify manufacturing, improve production efficiency, and help reduce production costs.

[0008] In addition, the housing for the battery pack according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the housing for a battery pack has two injection-molded layers, which are respectively disposed on both sides of the heat insulation layer.

[0010] According to some embodiments of the present invention, the injection-molded layer is a resin part, a polypropylene part, or a polyurethane part.

[0011] According to some embodiments of the present invention, the heat insulation layer consists of multiple layers stacked along the thickness direction of the heat insulation layer.

[0012] According to some embodiments of this utility model, the heat insulation layer is a basalt fiber component or a mica board component.

[0013] According to some embodiments of the present invention, the housing further includes a reinforcing layer in the thickness direction of the housing, the reinforcing layer being stacked with the heat insulation layer, and the reinforcing layer, the heat insulation layer and the injection molding layer being integrally injection molded.

[0014] According to some embodiments of the present invention, the reinforcing layer is a plurality of layers stacked along the thickness direction of the reinforcing layer.

[0015] According to some embodiments of this utility model, the reinforcing layer is a glass fiber component or a carbon fiber component.

[0016] The battery pack according to an embodiment of the present invention includes a housing for the battery pack as described in the embodiment of the present invention.

[0017] According to the embodiment of the present utility model, the battery pack is formed by stacking an injection molding layer and a heat insulation layer, and the injection molding layer and the heat insulation layer are integrally injection molded. The heat insulation layer can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, which is beneficial to improving the safety of the battery pack. It can also ensure high connection strength between the injection molding layer and the heat insulation layer, simplify manufacturing, improve production efficiency, and help reduce production costs.

[0018] The electrical equipment according to an embodiment of the present invention includes the battery pack described in the embodiment of the present invention.

[0019] According to the embodiments of the present invention, the electrical equipment is provided by stacking an injection molding layer and a heat insulation layer, and the injection molding layer and the heat insulation layer are integrally injection molded. The heat insulation layer can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, which is beneficial to improving the safety of the battery pack. It can also ensure high connection strength between the injection molding layer and the heat insulation layer, simplify manufacturing, improve production efficiency, and help reduce production costs.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the shell structure according to an embodiment of the present utility model;

[0023] Figure 2 This is a top view of the housing according to an embodiment of the present utility model;

[0024] Figure 3 yes Figure 2 A cross-sectional view along the direction indicated by line AA;

[0025] Figure 4 yes Figure 3 The enlarged structural diagram at point B is shown in the middle circle.

[0026] Figure 5 This is a cross-sectional view of the housing according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 100. Shell;

[0029] 10. Insulation layer;

[0030] 20. Injection molding layer;

[0031] 30. Reinforcing layer;

[0032] 40. Reinforcing ribs. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "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 through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0036] The following description, with reference to the accompanying drawings, describes a housing 100 for a battery pack according to an embodiment of the present invention. For example, the housing 100 may be the upper housing of the battery pack, etc.

[0037] Reference Figures 1-5 As shown, the housing 100 for a battery pack according to an embodiment of the present invention has a thickness direction (e.g., ...) Figure 4 The vertical direction shown may include: a heat insulation layer 10 and an injection molding layer 20.

[0038] Specifically, the injection molding layer 20 and the heat insulation layer 10 are stacked. The injection molding layer 20 can realize the required shape of the housing 100. When the battery cell of the battery pack catches fire, the heat insulation layer 10 of the housing 100 can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, thereby preventing thermal runaway and improving the safety of the battery pack.

[0039] The inventors of this application have discovered that if the injection-molded layer 20 is formed through a separate process, and then the heat insulation layer 10 is glued to the large surface of the injection-molded layer 20, it easily leads to problems such as high labor costs, long processing time, and high production costs. Therefore, in this utility model, the injection-molded layer 20 and the heat insulation layer 10 are integrally injection-molded, which can ensure high connection strength between the injection-molded layer 20 and the heat insulation layer 10, thereby improving the overall strength of the shell 100. Moreover, it is simple to manufacture, reduces assembly steps, saves labor, and is conducive to improving production efficiency. At the same time, it can save on gluing costs and the cost of adhesive required for gluing, which is conducive to reducing production costs.

[0040] It should be noted that, for ease of description, the directions such as "up and down", "left and right" and "front and back" in this utility model are based on the orientation relationships shown in the accompanying drawings, and are not a limitation on the orientation in actual application.

[0041] According to the embodiment of the present utility model, the housing 100 is formed by stacking the injection molding layer 20 and the heat insulation layer 10, and the injection molding layer 20 and the heat insulation layer 10 are integrally injection molded. The heat insulation layer 10 can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, which is beneficial to improving the safety of the battery pack. It can also ensure high connection strength between the injection molding layer 20 and the heat insulation layer 10, which is simple to manufacture, improves production efficiency, and helps to reduce production costs.

[0042] In some embodiments of this utility model, such as Figures 1-5 As shown, the injection molding layer 20 consists of two layers, and the two injection molding layers 20 are respectively disposed on both sides of the heat insulation layer 10, so that the injection molding layers 20 located on both sides of the heat insulation layer 10 can form a clamping effect on the heat insulation layer 10, which can further enhance the structural strength of the shell 100 and ensure good injection molding effect.

[0043] According to some embodiments of this utility model, the injection layer 20 can be a resin part, a polypropylene part, or a polyurethane part, all of which have good injection molding performance and mechanical strength, can meet the required injection molding and molding requirements, and are conducive to reducing production costs.

[0044] In some embodiments of this utility model, there can be multiple (two or more) heat insulation layers 10, and the multiple heat insulation layers 10 are arranged along the thickness direction of the heat insulation layer 10 (e.g., Figure 4 As shown in the diagram, the multiple insulation layers 10 stacked in the vertical direction can increase the heat insulation effect of the housing 100, ensuring good heat insulation and further preventing risks such as burn-through and open flame exposure, thereby improving the safety of the battery pack.

[0045] In some embodiments, the number of insulation layers 10 can be set according to actual conditions to meet different insulation requirements.

[0046] According to some embodiments of this utility model, the heat insulation layer 10 is a basalt fiber component or a mica board component, both of which have good heat insulation performance and mechanical strength, can effectively block the transfer of heat, prevent risks such as burn-through and open flame exposure, ensure good protection effect, and ensure the safety of the battery pack.

[0047] In some embodiments of this utility model, such as Figures 3-4 As shown, the housing 100 also includes a reinforcing layer 30 in the thickness direction. The reinforcing layer 30 is stacked with the heat insulation layer 10. The reinforcing layer 30 can increase the overall strength and rigidity of the housing 100, enabling the housing 100 to withstand greater external pressure and impact, ensuring good protection for the battery cell, and helping to extend its service life.

[0048] Furthermore, the integral injection molding of the reinforcing layer 30, the heat insulation layer 10, and the injection molding layer 20 ensures high connection strength between the reinforcing layer 30, the heat insulation layer 10, and the injection molding layer 20, thereby improving the overall strength of the shell 100. Moreover, the manufacturing process is simple, reducing assembly steps and improving production efficiency.

[0049] In some embodiments, the manufacturing process of the housing 100 is as follows:

[0050] The insulation layer 10 and the reinforcing layer 30 are cut into rolls to meet the required dimensions of the insulation layer 10 and the reinforcing layer 30.

[0051] The cut insulation layer 10 and reinforcing layer 30 are processed, for example, by stacking and splicing the insulation layer 10 and reinforcing layer 30.

[0052] The processed insulation layer 10 and reinforcing layer 30 are transferred to the preforming station to facilitate subsequent preforming work;

[0053] The insulation layer 10 and the reinforcing layer 30 are pre-formed to form a pre-formed body that meets the required shape requirements.

[0054] The preform is transferred to the high-pressure resin transfer molding (HP-RTM) station to facilitate subsequent injection molding.

[0055] Vacuuming is performed inside the mold containing the preform to facilitate subsequent injection molding and prevent air inside the mold from affecting the injection molding process.

[0056] Resin is injected into the mold, and the resin can form an injection layer 20, for example, by hot pressing or high-pressure resin injection.

[0057] After the heat insulation layer 10, the reinforcing layer 30 and the injection molding layer 20 are cured, the components are removed to realize the production and manufacturing of the housing 100.

[0058] According to some embodiments of the present invention, there are multiple reinforcing layers 30 (two or more), and the multiple reinforcing layers 30 are arranged along the thickness direction of the reinforcing layer 30 (e.g., Figure 4 The stacked arrangement (shown in the vertical direction) with multiple reinforcing ribs 40 enhances the strength and rigidity of the housing 100, providing more reliable support and protection for the battery cell and ensuring good protection for the battery cell.

[0059] In some embodiments, the number of reinforcing layers 30 can be set according to actual conditions to meet different structural strength requirements.

[0060] In some embodiments of this invention, the reinforcing layer 30 is made of glass fiber or carbon fiber, both of which possess high strength, high modulus, and lightweight characteristics, which are beneficial for improving the mechanical properties of the shell 100. Furthermore, glass fiber components have lower costs, which helps reduce production costs; carbon fiber components have higher strength and are lighter in weight, which helps meet the requirements for lightweight design.

[0061] In some embodiments, such as Figures 1-3 , Figure 5 As shown, the housing 100 is provided with reinforcing ribs 40. The reinforcing ribs 40 can enhance the structural strength of the housing 100, enabling the housing 100 to withstand greater external pressure and impact, ensuring good protection for the battery cell, and helping to extend its service life.

[0062] In some embodiments, Figure 1 , Figure 2 and Figure 5 As shown, there can be multiple reinforcing ribs 40 (two or more), and the multiple reinforcing ribs 40 are spaced apart along at least one of the width and length directions of the housing 100, that is, the multiple reinforcing ribs 40 can be arranged along the width direction of the housing 100 (e.g., along the width direction of the housing 100). Figure 1The reinforcing ribs 40 are spaced apart in the left-right direction as shown, or multiple reinforcing ribs 40 can be arranged along the length direction of the housing 100 (e.g., in the left-right direction). Figure 1 The reinforcing ribs 40 can be spaced apart in the front and rear directions as shown in the diagram, or multiple reinforcing ribs 40 can be spaced apart in the width and length directions of the housing 100, which can further improve the structural strength of the housing 100 and ensure good protection for the battery cell.

[0063] The battery pack according to an embodiment of the present invention includes a housing 100 for the battery pack according to an embodiment of the present invention. Since the housing 100 according to the embodiment of the present invention has the aforementioned beneficial technical effects, the battery pack according to the embodiment of the present invention, by stacking an injection-molded layer 20 and a heat-insulating layer 10, and integrally injection-molding the injection-molded layer 20 and the heat-insulating layer 10, can provide heat insulation, effectively preventing risks such as burn-through and open flame exposure, thus improving the safety of the battery pack. Furthermore, it ensures high connection strength between the injection-molded layer 20 and the heat-insulating layer 10, simplifies manufacturing, improves production efficiency, and helps reduce production costs.

[0064] The electrical device according to an embodiment of the present invention includes a battery pack according to an embodiment of the present invention. Since the battery pack according to the embodiment of the present invention has the aforementioned beneficial technical effects, the electrical device according to the embodiment of the present invention, by stacking an injection-molded layer 20 and a heat-insulating layer 10, and integrally injection-molding the injection-molded layer 20 and the heat-insulating layer 10, provides heat insulation, effectively preventing risks such as burn-through and open flame exposure, thus improving the safety of the battery pack. Furthermore, it ensures high connection strength between the injection-molded layer 20 and the heat-insulating layer 10, simplifies manufacturing, improves production efficiency, and helps reduce production costs.

[0065] The electrical equipment can be a vehicle, but is not limited to that.

[0066] In some embodiments, the electrical equipment can be a new energy vehicle, which can reduce carbon emissions and meet the required environmental protection requirements. Furthermore, the battery pack of this invention can be used in new energy vehicles to ensure the safety of the battery pack and reduce production costs.

[0067] The housing 100, battery pack, and other components and operations of the electrical equipment according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0068] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0069] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A housing for a battery pack, characterized in that, The housing includes, in the thickness direction of the housing: A heat insulation layer, wherein multiple heat insulation layers are stacked along the thickness direction of the heat insulation layer; The injection molding layer is stacked with the heat insulation layer and is integrally injection molded with the heat insulation layer. The injection molding layer consists of two layers and is respectively disposed on both sides of the heat insulation layer.

2. The housing for a battery pack according to claim 1, characterized in that, The injection-molded layer is a resin part, a polypropylene part, or a polyurethane part.

3. The housing for a battery pack according to claim 1, characterized in that, The insulation layer is made of basalt fiber or mica board.

4. The housing for a battery pack according to claim 1, characterized in that, The housing further includes, in the thickness direction of the housing: A reinforcing layer is provided, which is stacked with the heat insulation layer, and the reinforcing layer, the heat insulation layer and the injection molding layer are integrally injection molded.

5. The housing for a battery pack according to claim 4, characterized in that, The reinforcing layers are multiple layers stacked along the thickness direction of the reinforcing layers.

6. The housing for a battery pack according to claim 4 or 5, characterized in that, The reinforcing layer is made of glass fiber or carbon fiber.

7. A battery pack, characterized in that, Includes a housing for a battery pack according to any one of claims 1-6.

8. An electrical appliance, characterized in that, Includes the battery pack according to claim 7.

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