Shell assembly and battery

Abstract

The utility model relates to a shell assembly and a battery, the shell assembly comprises a shell, the shell is rectangular, at least one end of the shell is provided with an opening, corner rib plates are formed at corners of the shell, the corner rib plates protrude out of the outer wall of the shell, first sunken parts are arranged in the corner rib plates, and the first sunken parts are sunken outwards from the inner wall of the shell; the cover plate seals the opening. The utility model also discloses a battery. According to the utility model, the strength of the shell can be effectively enhanced, and the shell is prevented from being deformed, so that an internal battery cell can be better protected, the use reliability of the battery is improved, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field especially point to a casing assembly and battery. BACKGROUND

[0002] Lithium battery is widely used in electric automobile, smart phone, aerospace, medical instrument etc. field, lithium battery has environmental protection, energy density is high, cycle life is long etc. advantage. The existing lithium battery generally includes casing and cover plate, the casing inside places the electric core, but the strength of the existing battery casing is weak, easy to deform, is not favorable to the protection of the inside electric core, thereby influence the normal use of battery. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem of overcoming the defect of weak strength of battery casing in prior art and not favorable to the protection of electric core.

[0004] To solve the above technical problem, the utility model provides a casing assembly, including,

[0005] Casing, the casing is rectangular, at least one end of the casing is provided with an opening, the corner of the casing is formed with an angle rib plate, the angle rib plate protrudes from the outer wall of the casing, the angle rib plate has a first recess inside, the first recess is recessed from the inner wall of the casing to the outside,

[0006] Cover plate, the cover plate closes the opening.

[0007] In an embodiment of the utility model, the maximum distance of the angle rib plate protruding from the outer wall of the casing is less than 0.1mm.

[0008] In an embodiment of the utility model, at least two angle rib plates are provided at each corner of the casing along the height direction.

[0009] In an embodiment of the utility model, the casing is enclosed by four side plates connected end to end, the corner is formed between two adjacent side plates, and the positive and negative pieces are connected to one side plate.

[0010] In an embodiment of the utility model, the remaining side plates except the side plate where the positive and negative pieces are located are provided with a transverse rib plate, the transverse rib plate protrudes from the outer wall of the casing, the transverse rib plate has a second recess inside, and the second recess is recessed from the inner wall of the casing to the outside.

[0011] In an embodiment of the utility model, at least two transverse rib plates are provided on the side plate along the height direction.

[0012] In one embodiment of this utility model, longitudinal stiffeners are provided on the remaining side plates other than the side plates where the positive electrode and negative electrode are located. The longitudinal stiffeners protrude from the outer wall of the shell, and the interior of the longitudinal stiffeners has a third recessed portion, which is recessed outward from the inner wall of the shell.

[0013] In one embodiment of this utility model, the housing is a conductive element, the positive electrode is thermally fused to the housing via an insulating sheet, and the negative electrode is welded to the outer wall of the housing.

[0014] In one embodiment of this utility model, a liquid injection hole is provided on the side plate where the positive electrode and negative electrode are located, and the liquid plug is connected to the housing and seals the liquid injection hole.

[0015] This utility model also discloses a battery, including the housing described in any of the above claims, wherein a battery cell is disposed inside the housing.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0017] The casing and battery described in this utility model can effectively enhance the strength of the casing and prevent casing deformation, thereby providing better protection for the internal battery cells and improving the reliability and service life of the battery. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of a battery structure according to the present invention;

[0020] Figure 2 yes Figure 1 The front view of the structure shown;

[0021] Figure 3 yes Figure 2 Top view of the structure shown;

[0022] Figure 4 This is a structural diagram of the first embodiment of the shell of this utility model;

[0023] Figure 5 This is a structural diagram of a second embodiment of the shell of this utility model;

[0024] Figure 6 This is a schematic diagram of another battery structure according to the present invention;

[0025] Figure 7 yes Figure 6 The front view of the structure shown;

[0026] Figure 8 is Figure 7 a top view of the structure shown in Fig.

[0027] Figure 9 is Figure 6 an exploded view of the structure shown in Fig.

[0028] Figure 10 is Figure 9 a schematic view of one angle of the middle shell;

[0029] Figure 11 is Figure 9 a schematic view of another angle of the middle shell;

[0030] Figure 12 is a structural view of another embodiment of the shell of the present application;

[0031] Figure 13 is Figure 12 a front view of the structure shown in Fig.

[0032] Figure 14 is Figure 13 a top view of the structure shown in Fig.

[0033] Explanation of the reference signs in the attached drawings:

[0034] 10, shell; 101, opening; 102, corner; 103, side plate; 104, corner rib plate; 1041, first recess; 1042, arc-shaped transition part; 105, transverse rib plate; 1051, second recess; 106, longitudinal rib plate; 1061, third recess; 107, mounting hole; 108, liquid injection hole;

[0035] 20, positive electrode member; 30, insulating sheet; 40, negative electrode member; 50, liquid blocking plug; 60, gasket; 70, cover plate; 80, battery cell. DETAILED DESCRIPTION

[0036] The present application will be further described below in conjunction with the drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it. It is obvious that the described embodiments are only some of the embodiments of the present disclosure, but not all. The following description of at least one exemplary embodiment is actually only illustrative and by no means any limitation on the present disclosure and its applications or uses.

[0037] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "top", "side", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0038] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Embodiment one

[0040] Reference Figures 1-5 The embodiment discloses a shell 10 assembly, which comprises a shell 10 and a cover plate 70.

[0041] The shell 10 is rectangular, at least one end of the shell 10 is provided with an opening 101, so as to facilitate the placement of the battery cell 80 in the shell 10, and the corner 102 of the shell 10 is correspondingly formed with a corner rib plate 104, the corner rib plate 104 protrudes outward from the outer wall of the shell 10, and the corner rib plate 104 has a first recess 1041 inside, which is recessed outward from the inner wall of the shell 10.

[0042] The cover plate 70 seals the opening 101 to realize the sealing of the shell 10, and the shell 10 and the cover plate 70 can be connected by welding.

[0043] It can be understood that the opening 101 can be arranged only at one end of the shell 10, or the cover plate 70 can be arranged at both ends of the shell 10, and each opening 101 is sealed by the corresponding cover plate 70.

[0044] The corner 102 of the shell is a part of the shell 10 that is prone to deformation, once the corner 102 is deformed, the whole shell will be deformed, and the corner rib plate 104 arranged at the corner can effectively enhance the rigidity of the corner, thereby preventing the whole shell from being deformed. In addition, the corner rib plate is recessed from the inner wall to the outside, instead of directly welding a separate rib plate on the outer wall of the shell, which can reduce welding defects and welding deformation, thereby better ensuring the strength of the shell 10, and also facilitating the increase of the internal space of the shell and reducing the welding cost.

[0045] In some embodiments, the maximum distance of the corner rib plate 104 protruding from the outer wall of the shell 10 is less than 0.1mm, so as to ensure the strength of the shell 10 while avoiding the size of the shell 10 being too large.

[0046] Further, the two sides of the corner rib plate 104 at each corner 102 are connected to the outer wall of the shell 10 at the two sides of the corner 102 through the arc-shaped transition part 1042, so as to further reduce stress concentration and improve the rigidity of the shell 10.

[0047] In some embodiments, at least two corner rib plates 104 are arranged at each corner 102 of the shell 10 in the height direction (Z direction); or one corner rib plate 104 can be arranged at each corner 102 of the shell 10, but the length of the corner rib plate in the height direction (Z direction) can be appropriately increased to better ensure the strength of the shell 10.

[0048] When at least two corner rib plates 104 are arranged at each corner 102 of the shell 10 in the height direction, the distance between the two adjacent corner rib plates 104 is greater than 0.5mm, so as to facilitate processing.

[0049] The shell 10 is surrounded by four side plates 103 connected end to end, and each corner 102 is formed between two adjacent side plates 103. The positive electrode piece 20 and the negative electrode piece 40 are connected to one side plate 103 to lead out the positive electrode and the negative electrode of the internal battery cell 80.

[0050] The four side plates 103 of the shell 10 can be integrally formed.

[0051] Further, the shell 10 is a conductive element, the positive electrode piece 20 is connected to the shell 10 through the insulating sheet 30, and the negative electrode piece 40 is welded to the outer wall of the shell 10. The insulating sheet 30 can be made of an insulator made of a non-metallic material, and the insulating sheet 30 can be made of polypropylene material (PP plastic) to further ensure the effect of heat fusion.

[0052] In the above structure, the whole formed by the shell 10 and the negative electrode sheet is used as a negative electrode, and the positive electrode sheet and the shell 10 are insulated and separated by the insulating sheet 30.

[0053] Furthermore, the housing 10 is provided with a mounting hole 107, through which the positive electrode 20 passes through the insulating sheet 30 and extends into the mounting hole 107 to facilitate electrical connection with the positive electrode of the internal battery cell 80.

[0054] The housing 10 can be made of stainless steel.

[0055] The positive electrode 20 is thermally fused to the casing 10 via the insulating sheet 30, which simplifies the battery assembly process. On the other hand, it can also effectively avoid gaps between the positive electrode 20, the insulating sheet 30 and the casing 10, thereby effectively improving the overall sealing performance of the battery.

[0056] Among them, the negative electrode 40 can be made of nickel sheet, and the positive electrode 20 can be made of aluminum.

[0057] In some designs, the side plate 103 where the positive electrode 20 and the negative electrode 40 are located is also provided with an injection hole 108 to facilitate the injection of electrolyte into the housing 10. The plug 50 can be directly welded to the housing 10 and seal the injection hole 108.

[0058] Furthermore, the plug 50 is connected to the housing 10 via a metal gasket 60; the plug 50 may be made of steel.

[0059] In some implementations, the cover plate 70 is made of stainless steel.

[0060] Furthermore, an explosion-proof valve is provided on the cover plate 70 to achieve venting and pressure relief.

[0061] This embodiment also discloses a battery, including the aforementioned housing 10, with a battery cell 80 disposed inside the housing 10. The positive electrode of the battery cell 80 is electrically connected to a positive electrode component 20, and the negative electrode of the battery cell 80 is electrically connected to a negative electrode component 40.

[0062] Example 2

[0063] See Figures 6-11 The main difference between this embodiment and embodiment one is that: the other side plates 103, besides the side plates 103 where the positive electrode 20 and the negative electrode 40 are located, are also provided with transverse stiffeners 105. The transverse stiffeners 105 protrude from the outer wall of the shell 10, and the transverse stiffeners 105 have a second recess 1051 inside, which is recessed outward from the inner wall of the shell 10.

[0064] In some embodiments, the transverse stiffeners 105 protrude from the outer wall of the housing 10 by a maximum distance of less than 0.1 mm, so as to ensure the strength of the housing 10 while also preventing the housing 10 from being too large.

[0065] In some embodiments, at least two lateral ribs 105 are arranged on the side plate 103 along the height direction; or, only one lateral rib 105 can be arranged on the corresponding side plate 103 of the shell 10, but the length of the lateral rib 105 in the height direction (Z direction) can be appropriately increased to better ensure the strength of the shell 10.

[0066] When at least two lateral ribs 105 are arranged on the corresponding side plate 103 of the shell 10 along the height direction, the distance between the two adjacent lateral ribs 105 is greater than 0.5 mm to facilitate processing.

[0067] The embodiment also discloses a battery comprising the shell 10 described in any of the above embodiments, wherein an electric core 80 is arranged in the shell 10, the positive electrode of the electric core 80 is electrically connected with the positive electrode part 20, and the negative electrode of the electric core 80 is electrically connected with the negative electrode part 40.

[0068] Embodiment Three

[0069] With reference to Figures 12-14 The main difference between the embodiment and the first embodiment is that the longitudinal ribs 106 are arranged on the remaining side plates 103 except the side plate 103 on which the positive electrode part 20 and the negative electrode part 40 are arranged, the longitudinal ribs 106 protrude from the outer wall of the shell 10, the longitudinal ribs 106 have third recesses 1061 inside, and the third recesses 1061 are recessed from the inner wall of the shell 10.

[0070] In some embodiments, the maximum distance by which the longitudinal ribs 106 protrude from the outer wall of the shell 10 is less than 0.1 mm to ensure the strength of the shell 10 and avoid the size of the shell 10 being too large.

[0071] In some embodiments, at least two longitudinal ribs 106 are arranged on the side plate 103 along the vertical direction (X direction) of the height direction; further, the distance between the two adjacent longitudinal ribs 106 is greater than 0.5 mm to facilitate processing.

[0072] The embodiment also discloses a battery comprising the shell 10 described in any of the above embodiments, wherein an electric core 80 is arranged in the shell 10, the positive electrode of the electric core 80 is electrically connected with the positive electrode part 20, and the negative electrode of the electric core 80 is electrically connected with the negative electrode part 40.

[0073] The battery shell of each of the above embodiments can effectively enhance the strength of the shell, prevent the deformation of the shell, and thus better protect the internal electric core, thereby improving the use reliability and service life of the battery.

[0074] All the optional technical solutions above can be combined in any manner to form optional embodiments of the present application, that is, any number of embodiments can be combined to meet the requirements of different application scenarios, which are all within the protection scope of the present application and will not be described one by one here.

[0075] It should be noted that the above examples are merely examples for clear illustration, and are not limitations on the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A housing assembly, characterized in that: include, The shell is rectangular, with an opening at at least one end, and corner ribs formed at each corner of the shell. The corner ribs protrude from the outer wall of the shell, and the corner ribs have a first recess inside, which is recessed outward from the inner wall of the shell. A cover plate that closes the opening.

2. The housing assembly according to claim 1, characterized in that: The maximum distance by which the corner ribs protrude from the outer wall of the shell is less than 0.1 mm.

3. The housing assembly according to claim 1, characterized in that: At least two corner ribs are provided at each corner of the shell along the height direction.

4. The housing assembly according to claim 1, characterized in that: The shell is formed by four side plates connected end to end, with a corner formed between two adjacent side plates, and a positive electrode and a negative electrode connected to one of the side plates.

5. The housing assembly according to claim 4, characterized in that: Transverse stiffeners are provided on all side plates other than the side plates where the positive and negative electrodes are located. The transverse stiffeners protrude from the outer wall of the shell and have a second recess inside, which is recessed outward from the inner wall of the shell.

6. The housing assembly according to claim 5, characterized in that: At least two transverse stiffeners are provided along the height direction on the side plate where the transverse stiffeners are located.

7. The housing assembly according to claim 4, characterized in that: Longitudinal ribs are provided on all side plates other than the side plates where the positive and negative electrodes are located. The longitudinal ribs protrude from the outer wall of the shell and have a third recess inside. The third recess is recessed outward from the inner wall of the shell.

8. The housing assembly according to claim 4, characterized in that: The housing is a conductive element, the positive electrode is thermally fused to the housing through an insulating sheet, and the negative electrode is welded to the outer wall of the housing.

9. The housing assembly according to claim 4, characterized in that: The side plate where the positive and negative electrodes are located is also provided with a liquid injection hole, and a liquid plug is connected to the housing to seal the liquid injection hole.

10. A battery, characterized in that: It includes the housing as described in any one of claims 1-9, wherein a battery cell is disposed inside the housing.

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