Box body, battery and electric device

Abstract

The utility model relates to a box body, a battery and an electric device. Wherein the box body comprises a cover body; the sealing shell and the cover body are combined in a covering manner to form a space for accommodating a battery unit, the outer side of the sealing shell is sleeved with a protective frame body, and a first sealing piece is arranged between the sealing shell and the protective frame body; the sealing shell, the first sealing piece and the protection frame body are connected in a sealed mode through the first fastening piece. According to the battery provided by the invention, the sealing shell with excellent sealing performance is combined with the protective frame body with high strength, so that the defects that the structural strength of the sealing shell is low and the sealing performance of the protective frame body is poor are overcome, and the box body has high strength and high sealing performance at the same time. Besides, the box body is connected in a sealed mode through the first fastener, connection through a welding process is not needed, cost is reduced, the situation that the box body deforms due to the welding process can be avoided, and the quality reliability of the box body is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a box body, a battery and an electric device. BACKGROUND

[0002] The battery pack box body is used for accommodating battery monomers and providing support and protection for the battery monomers. The structural strength of the battery pack box body is an important safety factor. The battery pack box body needs to meet certain mechanical structural strength requirements to ensure that the vehicle can withstand the impact load of the bottom surface and other external forces during driving, and can greatly reduce the damage to the battery module caused by the extrusion of the battery pack box body.

[0003] However, when meeting the structural strength of the battery pack box body, it cannot well meet the demand of light weight. At present, the box body material is replaced (such as: replaced by an aluminum die-casting box body) to realize that the structural strength of the battery pack box body can be guaranteed and the requirement of light weight can be met, but there is a risk of air tightness failure. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application provide a box body, a battery and an electric device to solve at least one problem in the background art.

[0005] In a first aspect, the embodiments of the present application provide a box body, comprising:

[0006] a cover body;

[0007] a sealed shell, the sealed shell and the cover body cover and constitute a space for accommodating battery units, a protective frame body is sleeved outside the sealed shell, and a first sealing element is arranged between the sealed shell and the protective frame body;

[0008] a first fastener, the sealed shell, the first sealing element and the protective frame body are sealed and connected through the first fastener.

[0009] In combination with the first aspect of the present application, in an optional implementation manner, a plurality of bosses are arranged on one side bottom surface of the protective frame body towards the sealed shell, and each boss is provided with a mounting blind hole;

[0010] a first reinforcing portion is arranged on the surface of the sealed shell away from the protective frame body, a mounting groove is formed on the other surface corresponding to the first reinforcing portion, and a via hole is arranged on the bottom surface of the mounting groove;

[0011] the boss is embedded in the mounting groove, and the first fastener is sequentially connected with the via hole, the first sealing element and the mounting blind hole, so that the sealed shell and the protective frame body are sealed and connected.

[0012] In combination with the first aspect of the present application, in an optional implementation, the first sealing member is a first sealing ring, the first sealing ring is sleeved on the boss, and the first sealing ring protrudes from the surface of the boss before compression deformation.

[0013] In combination with the first aspect of the present application, in an optional implementation, an outer surface of a side wall of the protective frame is provided with a plurality of reinforcing ribs.

[0014] In combination with the first aspect of the present application, in an optional implementation, the protective frame is provided with a plurality of hollow regions, and the hollow regions are away from the boss.

[0015] In combination with the first aspect of the present application, in an optional implementation, a second sealing ring is arranged at a connection between the cover and the sealing shell, and the cover, the second sealing ring and the sealing shell are connected in a bolt sealing manner.

[0016] In combination with the first aspect of the present application, in an optional implementation, a connecting rib is arranged between adjacent bosses.

[0017] In combination with the first aspect of the present application, in an optional implementation, the boss is provided with a first step and a second step, the first step and the second step are both cylindrical, the first step and the second step are coaxially arranged, the first sealing ring is sleeved on the first step, and a diameter of the through hole is smaller than an outer diameter of the first step.

[0018] In a second aspect, the embodiments of the present application provide a battery, including any one of the boxes provided in the first aspect, and a battery cell is arranged in the box, and the battery cell is fixed to the bottom of the sealing shell through the first fastener.

[0019] In a third aspect, the embodiments of the present application provide a power consumption device, including the battery provided in the second aspect.

[0020] The battery provided in the embodiments of the present application has a sealing shell with excellent sealing performance and a protective frame with high strength, avoids the shortcomings of weak structural strength of the sealing shell and poor sealing performance of the protective frame, and thus the box has high strength and high sealing performance. In addition, the box is connected in a sealing manner through the first fastener, does not need to be connected through a welding process, reduces cost, avoids the deformation of the box caused by the welding process, and ensures the quality reliability of the box.

[0021] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0023] Figure 1 A structural exploded view of a battery cell and a box body according to an embodiment of the application;

[0024] Figure 2 A connection relationship diagram of a protective frame and a first sealing member in a box body according to an embodiment of the application;

[0025] Figure 3 A three-dimensional structural diagram of a protective frame in a box body according to an embodiment of the application;

[0026] Figure 4 A sealing shell structure diagram in a box body according to an embodiment of the application

[0027] Figure 5 A three-dimensional diagram of an overall structure of a box body according to an embodiment of the application;

[0028] Figure 6 A Figure 5 sectional view of A-A in FIG. 6;

[0029] Figure 7 A Figure 6 enlarged view of B in FIG. 6.

[0030] Reference signs:

[0031] a, battery cell;

[0032] 10, cover body; 20, sealing shell; 210, mounting groove; 220, via hole; 230, first reinforcing portion;

[0033] 30, protective frame; 310, mounting blind hole; 320, boss; 321, first step; 322, second step; 330, hollowed-out area; 340, reinforcing rib; 350, connecting rib;

[0034] 40, first fastener; 50, first sealing member; 60, second sealing ring; 70, second fastener. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present application will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the application but there can be many variations to these embodiments with the application. Therefore, the application should not be construed as limited to the exemplary embodiments set forth herein and one skilled in the art could derive alternatives from the enclosed claims as a consequence of the disclosure.

[0036] In the following description, numerous specific details are set forth to provide a more thorough understanding of the present application. However, it will be apparent to one of skill in the art upon

[0037] In the drawings, the size of layers, regions, elements, and the like, can be exaggerated for clarity. Like reference numerals in different drawings can represent the same element, or different aspects of the same element.

[0038] It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application. Similarly, a second element, component, region, layer or section discussed below could be termed a first element, component, region, layer or section without departing from the teachings of the present application.

[0039] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0040] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] For a thorough understanding of the application, detailed descriptions will be made in the following description and specific embodiments will be presented to illustrate the technical solutions of the application. The preferred embodiments of the application are described in detail as follows, however, the application can have other implementation manners in addition to these detailed descriptions.

[0042] Please refer to Figure 1 and Figure 2 , Figure 1 The battery cell a and the structure of the box are shown in the exploded view. The box provided by the embodiments of the application includes a cover body 10, a sealed shell 20, a protective frame body 30, a first sealing member 50 and a first fastener 40. The sealed shell 20 and the cover body 10 are covered and constitute a space for accommodating the battery cell a, the protective frame body 30 is sleeved outside the sealed shell 20, the first sealing member 50 is arranged between the sealed shell 20 and the protective frame body 30, and the sealed shell 20, the first sealing member 50 and the protective frame body 30 are sealingly connected through the first fastener 40.

[0043] The sealed shell 20 is a thin plate member made of steel material, the strength of the thin plate member made of steel material is poor, but the sealed shell 20 has good sealing effect, and the sealed shell 20 is formed by a stamping process, of course, not limited to this. The material of the protective frame body 30 is aluminum, and the protective frame body 30 is formed by an aluminum die casting process. The aluminum die casting process has a through hole that affects the sealing performance and has a risk of air tightness failure, but the aluminum die casting process has high structural strength.

[0044] The above box has the sealed shell 20 with excellent sealing performance and the protective frame body 30 with high strength, which avoids the shortcomings of weak structural strength of the sealed shell 20 and poor sealing performance of the protective frame body 30, and thus the box has high strength and high sealing performance. In addition, the box is sealingly connected through the first fastener 40, does not need to be connected by a welding process, reduces the cost and avoids the deformation of the box caused by the welding process, and ensures the quality reliability of the box.

[0045] In an optional embodiment, please refer to Figures 1 to 4The protective frame 30 is provided with a plurality of bosses 320 on the side bottom surface of the protective frame 30 facing the sealing shell 20, and each boss 320 is provided with a mounting blind hole 310. The sealing shell 20 is provided with a first reinforcing portion 230 on the side surface of the sealing shell 20 away from the protective frame 30, and the other side surface of the sealing shell 20 corresponding to the first reinforcing portion 230 forms a mounting groove 210, and the bottom surface of the mounting groove 210 is provided with a through hole 220. The protrusion is embedded in the mounting groove 210, and the first fastener 40 is connected in sequence with the through hole 220, the first sealing member 50 and the mounting blind hole 310, so that the sealing shell 20 and the protective frame 30 are sealingly connected.

[0046] The first sealing member 50 is a first sealing ring, the first sealing ring is sleeved on the boss 320, and the first sealing ring protrudes from the surface of the boss 320 before compression deformation, so as to improve the sealing effect between the sealing shell 20 and the boss 320, that is, to improve the sealing effect between the sealing shell 20 and the protective frame 30.

[0047] Please refer to Figure 3 The boss 320 has a first step 321 and a second step 322, the first step 321 is formed by extending part of the surface of the second step 322, and the first step 321 and the second step 322 are cylindrical structures and are coaxially arranged.

[0048] As a preferred, the first sealing ring is pasted on the surface of the first step 321, so as to greatly reduce the influence of the sealing effect caused by the position movement of the first sealing ring. As an example, the material of the first sealing ring is foam, of course, not limited to this. Further, the thickness of the first sealing ring before compression deformation is greater than the height of the first step 321, so as to improve the sealing effect between the boss 320 and the sealing shell 20. As an example, the thickness of the first sealing ring before compression deformation is 2 times the height of the first step 321, of course, according to the deformation amount of the first sealing ring itself, the first sealing ring before compression can also be 1.5 times, 2.5 times, 3 times, etc. of the height of the first step 321.

[0049] Further, as shown in Figures 5 to 7 The diameter of the through hole 220 is less than the outer diameter of the first step 321, so that the periphery of the through hole 220 can cover the surface of the first sealing ring, and the sealing effect between the sealing shell 20 and the protective frame 30 is improved.

[0050] Figure 3 As shown in the

[0051] Figure 1 and Figure 3As shown in FIG. 1, the protective frame 30 is provided with a plurality of hollow regions 330, which are away from the bosses 320 to reduce the weight of the protective frame 30, thereby reducing the total mass of the entire box. The shape and number of the hollow regions 330 can be set according to requirements, which can be rectangular, circular, oval or other irregular shapes, and the embodiments of the present application are not limited specifically.

[0052] Please refer to Figure 6 The outer surface of the sidewall of the protective frame 30 is provided with a plurality of reinforcing ribs 340, which at least include longitudinal and transverse reinforcing ribs 340, and the reinforcing ribs 340 can ensure the structural strength and extrusion resistance of the protective frame 30.

[0053] Please refer to Figure 1 A second sealing ring 60 is arranged at the connection between the cover 10 and the sealed shell 20, and the cover 10, the second sealing ring 60 and the sealed shell 20 are connected by bolt sealing. The cover 10 and the sealed shell 20 are connected by bolts, and the sealing between the cover 10 and the sealed shell 20 is realized under the action of the second sealing ring 60, realizing no welding and improving the reliability of the product.

[0054] The box formed by welding has the problem of high detection difficulty, and cannot be 100% detected, which has the risk of flowing out of defective parts. The embodiments of the present application realize the connection of the cover 10 and the sealed shell 20 by bolts, i.e. no welding process, and there is no problem of low detectability due to welding quality, which improves the reliability of the quality of the box.

[0055] In the application process of the box, the battery unit a and the sealed shell 20 are fixed to the protective frame 30 by the first fastener 40, and the first sealing member 50 is compressed to be flush with the first step 321 by the first fastener 40, realizing the sealed connection between the sealed shell 20 and the protective frame 30.

[0056] In the assembly process of the box, the cover 10 and the sealed shell 20 are connected by the second fastener 70, and the second sealing ring 60 between the cover 10 and the sealed shell 20 is connected to realize the sealing of the cover 10 and the sealed shell 20. The battery unit a, the sealed shell 20 and the protective frame 30 are sealed and connected by bolts, without welding, which can realize the connection and fixation of different materials.

[0057] The embodiments of the present application also provide a battery, which comprises the box provided by any of the above embodiments, and the box is provided with a battery unit a, and the battery unit a is fixed to the bottom of the sealed shell 20 by the first fastener 40. The box with high strength and good sealing performance is used to assemble the battery, thereby improving the stability and safety of the battery.

[0058] The embodiment of the application further provides a power utilization device comprising the battery provided in the above embodiment. The battery with better stability and safety can further ensure the stability and safety of the power utilization device.

[0059] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations of the claims. Various modifications and changes can also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, any combination of the technical features of the above embodiments can also be made to form additional embodiments of the application which can not be explicitly described. Therefore, the above embodiments only express several implementations of the application and do not limit the protection scope of the patent of the application.

Claims

1. A case characterized by comprising: It comprises: a cover (10); a sealed shell (20) which is covered by the cover (10) and constitutes a space for accommodating a battery unit (a), the sealed shell (20) is sleeved with a protective frame (30) outside, and a first sealing element (50) is arranged between the sealed shell (20) and the protective frame (30); a first fastener (40) for sealingly connecting the sealed shell (20), the first sealing element (50) and the protective frame (30).

2. The case of claim 1, wherein, A plurality of bosses (320) are arranged on the side bottom surface of the protective frame (30) facing the sealed shell (20), and each boss (320) is provided with a mounting blind hole (310); A first reinforcing portion (230) is arranged on the side surface of the sealed shell (20) away from the protective frame (30), a mounting groove (210) is formed on the other side surface corresponding to the first reinforcing portion (230), and a through hole (220) is arranged at the bottom surface of the mounting groove (210); The boss (320) is embedded in the mounting groove (210), and the first fastener (40) is sequentially connected with the through hole (220), the first sealing element (50) and the mounting blind hole (310), so that the sealed shell (20) and the protective frame (30) are sealingly connected.

3. The case of claim 2, wherein, The first sealing element (50) is a first sealing ring, which is sleeved on the boss (320), and the first sealing ring protrudes from the surface of the boss (320) before compression deformation.

4. The case according to claim 1 or 2, characterized in that, A plurality of reinforcing ribs (340) are arranged on the outer surface of the side wall of the protective frame (30).

5. The case of claim 2, wherein, The protective frame (30) is provided with a plurality of hollow regions (330) away from the boss (320).

6. The case of claim 1, wherein, A second sealing ring (60) is arranged at the connection between the cover (10) and the sealed shell (20), and the cover (10), the second sealing ring (60) and the sealed shell (20) are sealingly connected by bolts.

7. The case of claim 2, wherein, A connecting rib (350) is arranged between adjacent bosses (320).

8. The case of claim 3, wherein, The boss (320) is provided with a first step (321) and a second step (322), the first step (321) and the second step (322) are cylindrical, and the first step (321) and the second step (322) are coaxially arranged, the first sealing ring is sleeved on the first step (321), and the diameter of the through hole (220) is smaller than the outer diameter of the first step (321).

9. A battery, characterized by It comprises the box as claimed in any one of claims 1 to 8, and a battery unit (a) is arranged in the box, and the battery unit (a) is fixed to the bottom of the sealed shell (20) by the first fastener (40).

10. An electrical device, characterized by It comprises the battery as claimed in claim 9.

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