Battery pack box body

Abstract

The utility model provides a battery pack box body. The battery pack box body comprises a shell assembly, the shell assembly is provided with a containing cavity used for containing a battery cell and a mounting opening communicated with the containing cavity, the shell assembly comprises at least two shell parts which are arranged in a sleeving mode, and a vacuum layer is arranged between every two adjacent shell parts; and the cover body is arranged at the mounting opening in a covering manner. The utility model solves the problem of poor heat preservation effect of the battery pack box body in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack box. Background Art

[0002] With the continuous development of new energy technologies, batteries have been widely used as energy storage devices in electric vehicles, mobile communication base stations, portable devices and other fields. The performance of batteries is directly related to the stability and service life of the entire system. As a component of the battery system, the structural design of the battery pack has an important impact on the performance and safety of the battery.

[0003] The battery pack case is an important component of the battery pack. Its main function is to protect the internal cells from the external environment and provide sufficient structural strength to support the entire battery system. At present, in order to ensure the structural strength of the battery pack case, metal materials are usually used for manufacturing. Metal materials have excellent mechanical properties and processing properties, but their thermal conductivity is also relatively good.

[0004] In actual applications, there is a temperature difference between the battery cells inside the battery pack and the external environment, which causes heat to be conducted through the metal box. In extremely cold or hot environments, the battery cells are greatly affected by heat conduction, which may cause battery performance to deteriorate and even affect the battery's service life and safety.

[0005] Therefore, the prior art has the problem of poor thermal insulation effect of the battery pack box. Utility Model Content

[0006] The main purpose of the utility model is to provide a battery pack box to solve the problem of poor thermal insulation effect of the battery pack box in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery pack case is provided, comprising: a shell assembly, the shell assembly having a accommodating cavity for accommodating a battery cell and an installation opening connected to the accommodating cavity, the shell assembly comprising at least two nested shell parts, and a vacuum layer is provided between two adjacent shell parts; a cover body, the cover body is covered at the installation opening.

[0008] Furthermore, the battery pack case also includes at least two seals, and at least one seal is respectively arranged between the peripheries of two adjacent shell parts on one side close to the installation opening and between the shell assembly and the cover body.

[0009] Furthermore, the shell part is divided into two parts, namely a first shell and a second shell, the first shell is sleeved on the outside of the second shell, and one side of the corresponding installation openings of the first shell and the second shell are provided with installation flanges, and at least one sealing member is respectively arranged between the two installation flanges and between the installation flange and the cover body.

[0010] Furthermore, the battery pack case also includes a plurality of fixing components spaced apart along the periphery of the cover body, and at least a portion of the fixing components sequentially passes through the cover body, the seal, the second shell and the first shell.

[0011] Furthermore, the fixing assembly includes: a nut column, which passes through the second shell and the first shell in sequence and is welded to the second shell and the first shell respectively; a bolt, one end of which passes through the cover body from a side of the cover body away from the second shell and is threadedly connected to the nut column.

[0012] Furthermore, the mounting flanges of the first shell and the mounting flanges of the second shell are respectively provided with mounting holes corresponding to the nut columns, and the nut columns are welded to the periphery of the mounting holes; and / or the cover body is provided with mounting holes corresponding to the bolts, and the bolts pass through the cover body through the mounting holes.

[0013] Furthermore, one end of the nut column away from the first shell abuts against a side of the cover body close to the second shell.

[0014] Furthermore, the inner surface of the first shell has a mirror coating.

[0015] Furthermore, the battery pack case also includes a sealing plug, the inner surface of the second shell has a sealing hole that cooperates with the sealing plug, and the sealing hole is connected to the vacuum layer between the first shell and the second shell.

[0016] Furthermore, the outer surface of the shell assembly has at least one reinforcing rib; and / or the thickness of the vacuum layer is greater than or equal to 2 mm and less than or equal to 3 mm.

[0017] Applying the technical solution of the utility model, the battery pack box in the present application includes a shell assembly and a cover body. The shell assembly has a receiving cavity for receiving the battery cell and an installation opening connected to the receiving cavity. The shell assembly includes at least two sleeved shell parts, and a vacuum layer is provided between two adjacent shell parts; the cover body is provided at the installation opening.

[0018] When using the battery pack case of the present application, since the shell assembly has a receiving cavity, the receiving cavity can provide a placement space for the battery cell, and the shell assembly and the cover can also protect the battery cell. At the same time, since the shell assembly also has a vacuum layer, the thermal conductivity of the battery pack case as a whole can be reduced, thereby reducing the impact of the external environment on the battery cell contained in the receiving cavity. Therefore, the battery pack case of the present application effectively solves the problem of poor thermal insulation of the battery pack case in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a battery pack box according to a specific embodiment of the utility model is shown;

[0021] Figure 2 Shows Figure 1 An exploded view of the battery pack box;

[0022] Figure 3 Shows Figure 1 Schematic diagram of the internal structure of the battery pack box;

[0023] Figure 4 Shows Figure 1 Schematic diagram of the positional relationship between the accommodating cavity of the battery pack box and the vacuum layer;

[0024] Figure 5 Shows Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 Shows Figure 1 Schematic diagram of the positional relationship among the sealing hole, sealing gasket and sealing plug of the battery pack case.

[0026] The above drawings include the following reference numerals:

[0027] 10. Shell assembly; 11. Accommodating cavity; 12. Installation opening; 13. First shell; 14. Second shell; 15. Installation flange; 20. Cover; 30. Battery cell; 40. Seal; 50. Fixing assembly; 51. Nut column; 52. Bolt; 60. Installation hole; 70. Sealing plug; 71. Sealing hole; 72. Sealing gasket; 80. Vacuum layer. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] In order to solve the problem of poor thermal insulation effect of a battery pack case in the prior art, the present application provides a battery pack case.

[0032] like Figures 1 to 6 As shown, the battery pack case in the present application includes a shell assembly 10 and a cover 20. The shell assembly 10 has a receiving cavity 11 for receiving the battery cell 30 and a mounting opening 12 communicating with the receiving cavity 11. The shell assembly 10 includes at least two sleeved shell parts, and a vacuum layer 80 is provided between two adjacent shell parts; the cover 20 is covered at the mounting opening 12.

[0033] When the battery pack case of the present application is used, since the shell assembly 10 has a receiving cavity 11, the receiving cavity 11 can provide a placement space for the battery cell 30, and the shell assembly 10 and the cover 20 can also protect the battery cell 30. At the same time, since the shell assembly 10 also has a vacuum layer 80, the thermal conductivity of the battery pack case as a whole can be reduced, thereby reducing the impact of the external environment on the battery cell 30 accommodated in the receiving cavity 11. Therefore, the battery pack case of the present application effectively solves the problem of poor thermal insulation of the battery pack case in the prior art.

[0034] It should be noted that in the present application, since the housing assembly 10 includes at least two housing parts, the different housing parts are approximately the same in shape but different in size. In addition, the size of the housing part located outside is larger than the size of the housing part located inside, so as to ensure that a vacuum layer 80 can exist between the two housing parts that are mutually nested, thereby ensuring the thermal insulation effect of the battery pack box.

[0035] Specifically, the battery pack case further includes at least two seals 40, and at least one seal 40 is respectively provided between the peripheries of two adjacent shell parts close to the mounting opening 12, and between the shell assembly 10 and the cover 20. In the present application, since the two adjacent shell parts are sleeved, the sealing effect between the two shell parts can be ensured by providing the seal 40, thereby ensuring that a vacuum layer 80 can be formed between the two sleeved shell parts.

[0036] Optionally, the seal 40 may be a sealing gasket.

[0037] In a specific embodiment of the present application, Figure 2As shown, the shell part is divided into two parts, namely, a first shell 13 and a second shell 14. The first shell 13 is sleeved on the outside of the second shell 14, and the first shell 13 and the second shell 14 have mounting flanges 15 on one side corresponding to the mounting opening 12, and at least one sealing member 40 is respectively provided between the two mounting flanges 15 and between the mounting flange 15 and the cover 20. Moreover, in this embodiment, the size of the first shell 13 is larger than that of the second shell 14. At the same time, in this embodiment, the first shell 13 and the second shell 14 are respectively rectangular parallelepipeds with openings on the top, and the opening of the second shell 14 is the mounting opening 12 matched with the cover 20, so that the inner wall surface of the first shell 13 without openings, the outer wall surface of the second shell 14 without openings, and the sealing member 40 between the first shell 13 and the second shell 14 form a vacuum layer 80. As for the setting method of the installation flange 15, the installation flange 15 is set along the periphery of the opening of the first shell 13 and the periphery of the opening of the second shell 14, and at this time, the shape of the seal 40 is similar to the shape of the installation flange 15, or can cover the installation flange 15.

[0038] Preferably, the seal 40 between the first shell 13 and the second shell 14 has a stepped surface, and the edge of the mounting flange 15 of the second shell 14 abuts against the stepped surface. This arrangement can further ensure the sealing effect of the seal 40 on the vacuum layer 80 between the first shell 13 and the second shell 14, thereby ensuring the heat preservation effect of the battery pack body.

[0039] Optionally, the battery pack case further includes a plurality of fixing components 50 spaced apart along the periphery of the cover 20, and at least a portion of the fixing components 50 sequentially passes through the cover 20, the sealing member 40, the second shell 14, and the first shell 13. This arrangement enables the fixing components 50 to compress the sealing member 40 between the cover 20 and the second shell 14, and the sealing member 40 between the first shell 13 and the second shell 14, thereby ensuring the sealing effect of the battery pack case.

[0040] In a specific embodiment of the present application, Figure 2 , Figure 4 and Figure 5As shown, the fixing assembly 50 includes a nut column 51 and a bolt 52. The nut column 51 passes through the second housing 14 and the first housing 13 in sequence and is welded to the second housing 14 and the first housing 13 respectively; one end of the bolt 52 passes through the cover body 20 from the side of the cover body 20 away from the second housing 14 and is threadedly connected to the nut column 51. Preferably, the mounting flange 15 of the first housing 13 and the mounting flange 15 of the second housing 14 are respectively provided with mounting holes 60 corresponding to the nut column 51, and the nut column 51 is welded to the periphery of the mounting hole 60; the cover body 20 is provided with a mounting hole 60 corresponding to the bolt 52, and the bolt 52 passes through the cover body 20 through the mounting hole 60. When installing the nut column 51 in the present application, the nut column 51 can be welded to the second shell 14 first, and then after the second shell 14 is assembled with the first shell 13 and the seal 40, the nut column 51 can be welded to the first shell 13. At this time, the second shell 14 can press the seal 40 between the first shell 13 and the second shell 14, thereby ensuring the sealing effect of the vacuum layer 80. Of course, in the present application, the seal is also provided with a mounting hole corresponding to the nut column.

[0041] Optionally, one end of the nut column 51 away from the first shell 13 abuts against a side of the cover 20 close to the second shell 14 .

[0042] Optionally, the inner surface of the first shell 13 has a mirror coating, which can reflect heat through the mirror coating, thereby further ensuring the heat preservation effect of the battery pack body.

[0043] Alternatively, if Figure 6 As shown, the battery pack case also includes a sealing plug 70, and the inner surface of the second shell 14 has a sealing hole 71 that cooperates with the sealing plug 70, and the sealing hole 71 is connected to the vacuum layer 80 between the first shell 13 and the second shell 14. Through this arrangement, after the assembly is completed, the space between the first shell 13 and the second shell 14 can be evacuated through the sealing hole 71, so that a vacuum layer 80 is formed between the first shell 13 and the second shell 14, and the sealing hole 71 is sealed by the sealing plug 70 after the vacuum operation is completed. Of course, in order to further ensure the sealing effect, a sealing gasket 72 can also be set between the sealing plug 70 and the sealing hole 71.

[0044] Optionally, the outer surface of the housing assembly 10 has at least one reinforcing rib. The provision of the reinforcing rib can effectively increase the overall strength of the battery pack case, thereby ensuring the service life of the battery pack case.

[0045] Optionally, the thickness of the vacuum layer 80 is greater than or equal to 2 mm and less than or equal to 3 mm.

[0046] It should be noted that in the present application, the housing assembly 10 can be made of metal material, and for the cover 20, since the strength requirement of the cover 20 is relatively lower than that of the housing assembly 10, the cover 20 can be made of composite materials such as SMC, so as to ensure the protection effect of the cover 20. At the same time, the interfaces of the battery pack, such as the thermal management interface, the electrical connection interface, etc., can also be set on the cover 20 or corresponding openings can be set on the cover 20.

[0047] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0048] 1. Effectively solve the problem of poor thermal insulation effect of the battery pack box in the prior art;

[0049] 2. Simple structure and stable performance.

[0050] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack box, characterized in that: include: A housing assembly (10), the housing assembly (10) comprising a housing cavity (11) for accommodating a battery cell (30) and a mounting opening (12) communicating with the housing cavity (11), the housing assembly (10) comprising at least two sleeved housing portions, and a vacuum layer (80) being provided between two adjacent housing portions; A cover body (20), wherein the cover body (20) is arranged to cover the installation opening (12).

2. The battery pack case according to claim 1, characterized in that: The battery pack case further comprises at least two seals (40), and at least one seal (40) is respectively arranged between the peripheries of two adjacent shell parts on one side close to the installation opening (12) and between the shell assembly (10) and the cover body (20).

3. The battery pack case according to claim 2, characterized in that: The shell part is composed of two parts, namely a first shell (13) and a second shell (14); the first shell (13) is sleeved on the outside of the second shell (14); and the first shell (13) and the second shell (14) have mounting flanges (15) on one side corresponding to the mounting opening (12); and at least one sealing member (40) is respectively arranged between the two mounting flanges (15) and between the mounting flange (15) and the cover body (20).

4. The battery pack case according to claim 3, characterized in that: The battery pack case further comprises a plurality of fixing components (50) arranged at intervals along the periphery of the cover body (20), and at least a portion of the fixing components (50) passes through the cover body (20), the sealing member (40), the second shell (14) and the first shell (13) in sequence.

5. The battery pack case according to claim 4, characterized in that: The fixing assembly (50) comprises: A nut column (51), wherein the nut column (51) passes through the second shell (14) and the first shell (13) in sequence and is welded to the second shell (14) and the first shell (13) respectively; A bolt (52), one end of the bolt (52) passes through the cover body (20) from a side of the cover body (20) away from the second shell (14) and is threadedly connected to the nut column (51).

6. The battery pack case according to claim 5, characterized in that: The mounting flange (15) of the first shell (13) and the mounting flange (15) of the second shell (14) are respectively provided with mounting holes (60) corresponding to the nut column (51), and the nut column (51) is welded to the periphery of the mounting hole (60); and / or The cover body (20) is provided with a mounting hole (60) corresponding to the bolt (52), and the bolt (52) passes through the cover body (20) through the mounting hole (60).

7. The battery pack case according to claim 5, characterized in that: One end of the nut column (51) away from the first shell (13) abuts against a side of the cover body (20) close to the second shell (14).

8. The battery pack case according to any one of claims 3 to 7, characterized in that: The inner surface of the first shell (13) has a mirror coating.

9. The battery pack case according to any one of claims 3 to 7, characterized in that: The battery pack case also includes a sealing plug (70), the inner surface of the second shell (14) has a sealing hole (71) that cooperates with the sealing plug (70), and the sealing hole (71) is connected to the vacuum layer (80) between the first shell (13) and the second shell (14).

10. The battery pack case according to any one of claims 1 to 7, characterized in that: The outer surface of the housing component (10) has at least one reinforcing rib; and / or The thickness of the vacuum layer (80) is greater than or equal to 2 mm and less than or equal to 3 mm.

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