Battery shell and battery

Abstract

The utility model relates to the technical field of new energy, in particular to a battery shell and a battery, and aims to solve the problems of fixing and sealing of the edges of a first convex part, a second convex part and a cover plate in the prior art. Therefore, the battery shell comprises a first shell body, a second shell body and a cover plate, the second shell body is contained in the first shell body and covers an opening of the first shell body, the cover plate covers an opening of the second shell body, the first shell body is provided with a first protruding part, the second shell body is provided with a second protruding part, and the first protruding part and the second protruding part are arranged in the first shell body. The first protruding part, the second protruding part and the edge of the cover plate are bent to form a winding part, the first protruding part, the second protruding part and the edge of the cover plate are bent to form the winding part, and therefore the first shell, the second shell and the cover plate are fixed and sealed, the structure is stable, and the sealing effect is more ideal.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically providing a battery casing and a battery. Background Technology

[0002] With increasing environmental pollution and growing environmental awareness, new energy vehicles have developed rapidly, including power batteries, primarily lithium batteries.

[0003] Traditional lithium batteries consist of a casing and a battery cell housed within the casing. The casing has a single cavity, and the battery cell is housed within this single cavity. However, to improve the battery's energy density, two independent cavities can be incorporated into the casing. This casing includes a first shell, a second shell, and a cover plate. The first protrusion of the first shell, the second protrusion of the second shell, and the edge of the cover plate are fixedly connected by through-welding. However, through-welding cannot achieve a stable weld on three layers of material, thus affecting the overall structural stability and sealing effect, and shortening the battery's lifespan.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of fixing and sealing the edges of the existing first protrusion, second protrusion and cover plate.

[0006] In a first aspect, the present invention provides a battery housing, including a first housing, a second housing, and a cover plate, wherein the second housing is housed within the first housing and covers the opening of the first housing, and the cover plate covers the opening of the second housing, wherein the first housing has a first protrusion, and the second housing has a second protrusion, and the first protrusion, the second protrusion, and the edge of the cover plate are bent to form a winding portion.

[0007] By adopting the above technical solution, the first protrusion, the second protrusion and the edge of the cover plate are bent to form a winding part, thereby achieving the fixation and sealing of the first housing, the second housing and the cover plate, resulting in a more stable structure and a more ideal sealing effect.

[0008] In the preferred embodiment of the battery casing described above, the first protrusion, the second protrusion, and the edge of the cover plate are arranged sequentially.

[0009] In the preferred embodiment of the battery casing described above, the winding portion includes a bending portion, which is U-shaped.

[0010] In the preferred embodiment of the battery casing described above, the curved portion includes a first sub-curved portion, a second sub-curved portion, and a third sub-curved portion arranged in sequence.

[0011] In the preferred embodiment of the battery casing described above, the winding portion further includes a fixing portion, which is housed inside the first sub-bent portion.

[0012] In the preferred embodiment of the battery casing described above, the winding portion further includes an arc-shaped portion, the first end of which is connected to the third sub-bending portion, and the second end of which is connected to the fixing portion.

[0013] In the preferred embodiment of the battery casing described above, the winding portion further includes a clamping portion, which is housed inside the first sub-bent portion.

[0014] In the preferred embodiment of the battery casing described above, the winding portion further includes a first connecting portion, the first end of which is connected to the third sub-bending portion, and the second end of which is connected to the clamping portion.

[0015] In the preferred embodiment of the battery casing described above, the winding portion further includes a second connecting portion and a first extension portion housed inside the clamping portion, wherein a first end of the second connecting portion is connected to the second sub-bent portion and a second end of the second connecting portion is connected to the first extension portion; and / or, the winding portion further includes a third connecting portion and a second extension portion housed inside the clamping portion, wherein a first end of the third connecting portion is connected to the first sub-bent portion and a second end of the third connecting portion is connected to the second extension portion.

[0016] In a second aspect, the present invention also provides a battery, the battery comprising the aforementioned battery casing. Attached Figure Description

[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a perspective view of the battery casing of this utility model;

[0019] Figure 2 yes Figure 1 The exploded view shown is of the battery casing of this utility model;

[0020] Figure 3 yes Figure 1 The image shown is a cross-sectional view of the battery casing of this utility model;

[0021] Figure 4 yes Figure 3 The image shows a cross-sectional view of one embodiment of the winding portion of the battery casing of this utility model;

[0022] Figure 5 yes Figure 3The diagram shows a cross-sectional view of another embodiment of the winding portion of the battery casing of this utility model.

[0023] List of reference numerals in the attached diagram:

[0024] 100 - Battery casing; 1 - First casing; 11 - First protrusion; 111 - First sub-bend; 112 - First extension; 113 - Second connecting part; 2 - Second casing; 21 - Second protrusion; 211 - Second sub-bend; 212 - Second extension; 213 - Third connecting part; 3 - Cover plate; 31 - Edge; 311 - Third sub-bend; 312 - Fixing part; 313 - First connecting part; 314 - Clamping part; 315 - First connecting part; 4 - Winding part. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," "bottom," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In one embodiment, such as Figures 1 to 4 As shown, a battery casing 100 of the present invention includes a first casing 1, a second casing 2 and a cover plate 3. The second casing 2 is housed inside the first casing 1 and covers the opening of the first casing 1, and the cover plate 3 covers the opening of the second casing 2.

[0029] Preferably, the first housing 1 can be a cuboid, a cylinder, or other geometric shapes. Further, the first housing 1 can be made of aluminum, steel, etc., without specific limitations. Even further, the first housing 1 is preferably integrally formed by stamping.

[0030] More preferably, the second housing 2 can be a cuboid, a cylinder, or other geometric shape, and the shape of the second housing 2 is preferably adapted to the shape of the first housing 1 so that the second housing 2 can be housed within the first housing 1. Furthermore, the second housing 2 can be made of aluminum, steel, etc., without specific limitations. Even further, the second housing 2 is preferably integrally formed by stamping.

[0031] More preferably, the first housing 1 has an opening for inserting the battery cell. The opening can be rectangular, circular, or other geometric shapes, and the opening faces the second housing 2.

[0032] More preferably, the second housing 2 passes through the opening and is housed within the first housing 1, the outer surface of the second housing 2 is attached to the inner surface of the first housing 1, and the second housing 2 covers the opening of the first housing 1 to seal the opening of the first housing 1 and prevent electrolyte leakage from the first housing 1.

[0033] Furthermore, the second housing 2 is provided with an opening, which can be rectangular, circular, or other geometric shapes. The cover plate 3 covers the opening of the second housing 2 to seal the opening of the second housing 2 and prevent the electrolyte inside the second housing 2 from leaking.

[0034] Furthermore, the second housing 2 is positioned between the first housing 1 and the cover plate 3, thereby achieving a stable connection and seal between the three.

[0035] In one embodiment, the first housing 1 has a first protrusion 11, and the second housing 2 has a second protrusion 21. The first protrusion 11, the second protrusion 21, and the edge 31 of the cover plate 3 are bent to form a winding portion 4, such as... Figures 1 to 4 As shown.

[0036] Preferably, the first protrusion 11 is provided around the opening of the first housing 1, and the first protrusion 11 extends from the edge of the opening of the first housing 1 in a direction away from the first housing 1.

[0037] More preferably, the second protrusion 21 is provided around the opening of the second housing 2. The second protrusion 21 extends from the edge of the opening of the second housing 2 in a direction away from the second housing 2. When the second housing 2 is housed in the first housing 1, the second protrusion 21 extends out from the opening of the first housing 1 and fits against the first protrusion 11, which facilitates bending and winding in the later stage.

[0038] Preferably, the cover plate 3 covers the opening of the second housing 2, and the edge 31 of the cover plate 3 is attached to the second protrusion 21. The first protrusion 11, the second protrusion 21 and the edge of the cover plate 3 are superimposed on each other so that the whole can be bent and rolled later to achieve a fixed connection between the three.

[0039] More preferably, the first protrusion 11, the second protrusion 21 and the edge 31 of the cover plate 3 overlap and bend to form a winding portion 4, thereby achieving a stable connection between the three and enhancing the sealing effect between them, effectively preventing leakage of the internal electrolyte.

[0040] Furthermore, the winding portion 4 can be located on the side of the first protrusion 11 opposite to the second protrusion 21, or it can be located on the edge of the cover plate 3 opposite to the second protrusion 21. The specific position can be selected as needed and is not specifically limited here.

[0041] Furthermore, the first protrusion 11, the second protrusion 21, and the edge 31 of the cover plate 3 can be bent or rolled together, or partially bent or rolled, etc. The specific bending and rolling method can be set as needed, and no specific limitation is made here.

[0042] In one embodiment, the first protrusion 11, the second protrusion 21, and the edge 31 of the cover plate 3 are arranged sequentially, such as... Figures 1 to 4 As shown.

[0043] Preferably, the second protrusion 21 is located between the first protrusion 11 and the edge 31 of the cover plate 3, which facilitates the bending and winding of the three parts and improves the structural stability.

[0044] More preferably, one surface of the second protrusion 21 is attached to the surface of the first protrusion 11, so that bending and rolling it not only enhances the fixing effect between the two, but also significantly improves the sealing effect.

[0045] Preferably, the other surface of the second protrusion 21 is attached to the surface of the edge 31 of the cover plate 3, so that bending and rolling it not only helps to enhance the fixing effect between the two, but also significantly improves the sealing effect.

[0046] In one embodiment, the winding portion 4 includes a bent portion, the bent portion being U-shaped, such as... Figure 4 As shown.

[0047] Preferably, the curved portion is provided on one side of the battery housing 100 and surrounds the battery housing 100, thereby facilitating the complete fixation and sealing of the first housing 1, the second housing 2 and the cover plate 3.

[0048] More preferably, the curved part is U-shaped, which facilitates processing and can be compacted and sealed from both sides, resulting in a significant fixing effect.

[0049] In one embodiment, the curved portion includes a first sub-curved portion 111, a second sub-curved portion 211, and a third sub-curved portion 311 arranged sequentially, such as... Figure 4 and Figure 5 As shown.

[0050] Preferably, the first sub-bent 111 is connected to the first housing 11, for example, to the edge of the opening of the first housing 1, and the first sub-bent 111 is U-shaped.

[0051] More preferably, the second sub-bent 211 is connected to the second housing 2, for example, to the edge of the opening of the second housing 2, and the second sub-bent 211 is U-shaped.

[0052] Preferably, the third sub-bend 311 is connected to the cover plate 3, and the third sub-bend 311 is U-shaped.

[0053] More preferably, the second sub-bending portion 211 is located between the first sub-bending portion 111 and the third sub-bending portion 311, thereby facilitating their overlapping bending to achieve fixation and sealing.

[0054] Furthermore, the first sub-bend 111 is housed inside the second sub-bend 211, and the outer surface of the first sub-bend 111 is attached to the inner surface of the second sub-bend 211, thereby facilitating the bending of both together to achieve fixation and sealing.

[0055] Furthermore, the second sub-bending portion 211 is housed inside the third sub-bending portion 311, and the outer surface of the second sub-bending portion 211 is attached to the inner surface of the third sub-bending portion 311, thereby facilitating the bending of both portions together to achieve fixation and sealing.

[0056] In one embodiment, the winding portion 4 further includes a fixing portion 312, which is received inside the first sub-bent portion 111, such as... Figure 4 As shown.

[0057] Preferably, the fixing part 312 is flat. In other embodiments, the fixing part 312 may also be in other geometric shapes, such as curved shapes, etc., which are not specifically limited here.

[0058] More preferably, the fixing part 312 is housed inside the first sub-bent portion 111, and the fixing part 312 is attached to the inner surface of the first sub-bent portion 111, thereby facilitating a stable connection between the two.

[0059] More preferably, a gap is formed between the end face of the fixing part 312 and the inner surface of the first sub-bent part 111, and the gap is filled with sealant, thereby significantly enhancing the connection strength between the two.

[0060] In one embodiment, the winding portion 4 further includes an arc-shaped portion 313, the first end of which is connected to the third sub-bending portion 311, and the second end of which is connected to the fixing portion 312, such as... Figure 4 As shown.

[0061] Preferably, the arc-shaped portion 313 is arc-shaped, which facilitates the connection between the third sub-bending portion 311 and the fixing portion 312.

[0062] More preferably, the first end of the arc-shaped portion 313 is fixedly connected to the third sub-bent portion 311. The two can be integrally formed or separately set, etc., without specific limitations.

[0063] More preferably, the second end of the arc-shaped portion 313 is fixedly connected to the fixing portion 312. The two can be integrally formed or separately set, etc., without specific limitations.

[0064] In one embodiment, the winding portion 4 further includes a clamping portion 314, which is received inside the first sub-bent portion 111, such as... Figure 5 As shown.

[0065] Preferably, the clamping part 314 is U-shaped. The clamping part 314 may also be other geometric shapes. Users can choose to set it according to their needs, and no specific limitation is made here.

[0066] More preferably, the clamping part 314 is housed inside the first sub-bent portion 111, and the outer surface of the clamping part 314 is attached to the inner surface of the first sub-bent portion 111, thereby facilitating a stable connection between the two and achieving a significant sealing effect.

[0067] In one embodiment, the winding portion 4 further includes a first connecting portion 315, a first end of which is connected to the third sub-bending portion 311, and a second end of which is connected to the clamping portion 314. Figure 5 As shown.

[0068] Preferably, the first connecting portion 315 is located between the third sub-bent portion 311 and the clamping portion 314, so as to connect the third sub-bent portion 311 and the clamping portion 314.

[0069] More preferably, the first end of the first connecting portion 315 is connected to the third sub-bent portion 311. The two can be integrally formed or separately set, etc., without specific limitations.

[0070] More preferably, the second end of the first connecting part 315 is fixedly connected to the clamping part 314. The two can be integrally formed or separately set, etc., without specific limitations.

[0071] More preferably, the first connecting portion 315 may be arc-shaped or other geometric shapes, etc., without specific limitations.

[0072] In one embodiment, the winding portion 4 further includes a second connecting portion 213 and a first extension portion 212 housed inside the clamping portion 314. A first end of the second connecting portion 213 is connected to the second sub-bent portion 211, and a second end of the second connecting portion 213 is connected to the first extension portion 212. Figure 5 As shown.

[0073] Preferably, the second connecting portion 213 is located between the first extension portion 212 and the second sub-bend portion 211 to connect the two and enhance structural stability.

[0074] More preferably, the first extension 212 is housed inside the clamping portion 314, and the first extension 212 fits against the inner surface of the clamping portion 314, thereby enhancing the connection strength and sealing effect between the two. Furthermore, there is a gap between the end face of the first extension 212 and the inner surface of the clamping portion 314, and the gap is filled with sealant, thereby further enhancing the connection strength and sealing effect between the two.

[0075] More preferably, the first end of the second connecting part 213 is fixedly connected to the second sub-bent part 211. The two can be integrally formed or separately set, etc., without specific limitation here.

[0076] More preferably, the second end of the second connecting part 213 is connected to the first extension part 212. The two can be integrally formed or separately set, etc., without specific limitations.

[0077] In one embodiment, the winding portion 4 further includes a third connecting portion 113 and a second extension portion 112 housed inside the clamping portion 314. One end of the third connecting portion 113 is connected to the first sub-bent portion 111, and the other end of the third connecting portion 113 is connected to the second extension portion 112. Figure 5 As shown.

[0078] Preferably, the third connecting portion 113 is located between the second extension portion 112 and the first sub-bend portion 111 so as to serve both and enhance structural stability.

[0079] More preferably, the second extension 112 is housed inside the clamping portion 314, and the second extension 112 is attached to the inner surface of the clamping portion 314 and to the first extension 212, thereby enhancing the connection strength and sealing effect of the three components. Furthermore, a gap exists between the end face of the second extension 112 and the inner surface of the clamping portion 314, and this gap is filled with sealant, thereby further enhancing the connection strength and sealing effect of the two components.

[0080] More preferably, the first end of the third connecting part 113 is fixedly connected to the first sub-bent part 111. The two can be integrally formed or separately set, etc., without specific limitation here.

[0081] More preferably, the second end of the third connecting part 113 is fixedly connected to the second extension part 112. The two can be integrally formed or separately set, etc., without specific limitations.

[0082] In one embodiment, the present invention also provides a battery comprising the battery casing described in any of the preceding claims.

[0083] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0084] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A battery case characterized by comprising: The battery shell comprises a first shell, a second shell and a cover plate, the second shell is accommodated in the first shell and covers an opening of the first shell, the cover plate covers an opening of the second shell, the first shell is provided with a first protruding part, the second shell is provided with a second protruding part, and the first protruding part, the second protruding part and the edge of the cover plate are bent to form a winding part.

2. The battery case according to claim 1, wherein The first protruding part, the second protruding part and the edge of the cover plate are arranged in sequence.

3. The battery case according to claim 2, characterized by The winding part comprises a bending part, and the bending part is in the shape of "U".

4. The battery case according to claim 3, characterized by The bending part comprises a first sub-bending part, a second sub-bending part and a third sub-bending part arranged in sequence.

5. The battery case according to claim 4, wherein The winding part further comprises a fixing part, and the fixing part is accommodated in the interior of the first sub-bending part.

6. The battery case of claim 5, wherein, The winding part further comprises an arc-shaped part, a first end of the arc-shaped part is connected with the third sub-bending part, and a second end of the arc-shaped part is connected with the fixing part.

7. The battery case of claim 4, wherein, The winding part further comprises a clamping part, and the clamping part is accommodated in the interior of the first sub-bending part.

8. The battery case of claim 7, wherein, The winding part further comprises a first connecting part, a first end of the first connecting part is connected with the third sub-bending part, and a second end of the first connecting part is connected with the clamping part.

9. The battery case of claim 8, wherein, The winding part further comprises a second connecting part, a first extending part accommodated in the interior of the clamping part, a first end of the second connecting part is connected with the second sub-bending part, and a second end of the second connecting part is connected with the first extending part. And / or, the winding part further comprises a third connecting part, a second extending part accommodated in the interior of the clamping part, a first end of the third connecting part is connected with the first sub-bending part, and a second end of the third connecting part is connected with the second extending part.

10. A battery, characterized by The battery shell comprises any one of claims 1 to 9.

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