Battery shell and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery shell and a battery, and aims to solve the problems of fixation and sealing of a first protruding part, the edge of a partition plate and a second protruding part in the prior art. Therefore, the battery shell provided by the utility model comprises a first shell, a second shell and a partition plate, the partition plate is arranged between the first shell and the second shell, the first shell comprises a first protruding part, the second shell comprises a second protruding part, and the partition plate is arranged between the first shell and the second shell. The edge of the partition plate is located between the first protruding part and the second protruding part, and the first protruding part, the second protruding part and the edge of the partition plate are bent to form a winding part. The edges of the first protruding part, the second protruding part and the partition plate are bent to form the winding part, so that the first shell, the second shell and the partition plate are stably connected, the stability is higher, the sealing effect is enhanced, and internal electrolyte is effectively prevented from leaking.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy technology field, concretely provides a battery case and battery. BACKGROUND

[0002] With the aggravation of environmental pollution and the enhancement of people's environmental protection consciousness, new energy vehicles have been developed rapidly, which also includes power batteries mainly of lithium batteries.

[0003] The traditional lithium battery includes a shell and a battery cell received in the shell, and the shell is usually a single cavity. In order to improve the energy density of the battery, multiple and independent cavities can be arranged in the shell, and one battery cell is arranged in each cavity. Taking a shell with two cavities as an example, the shell structure of the double-cavity battery includes a first shell, a second shell, and a partition plate arranged between the first shell and the second shell. The edge of the first shell is provided with a first flange, and the edge of the second shell is provided with a second flange. The first flange, the edge of the partition plate, and the second flange are overlapped and fixed and sealed by penetration welding. However, the existing penetration welding cannot realize the welding of three layers of plates, the stability of the welding is poor, and the sealing effect is not ideal, which affects the service life of the battery.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims to solve the above technical problems, i.e., to solve the problem of fixing and sealing the first protruding part, the edge of the partition plate, and the second protruding part.

[0006] In a first aspect, the utility model provides a battery shell, which includes a first shell, a second shell, and a partition plate. The partition plate is arranged between the first shell and the second shell. The first shell includes a first protruding part, and the second shell includes a second protruding part. The edge of the partition plate is between the first protruding part and the second protruding part. The first protruding part, the second protruding part, and the edge of the partition plate are bent to form a winding part.

[0007] In the above technical solution, the first protruding part, the edge of the partition plate, and the second protruding part are bent to form a winding part, thereby realizing stable connection of the three parts, better structural stability, and enhanced sealing effect, effectively preventing internal electrolyte leakage.

[0008] In the preferred technical solution of the above battery shell, the winding part includes a bending part, and the bending part is in the shape of a U.

[0009] In the preferred technical solution of the above battery shell, the bending part includes a first sub-bending part, a third sub-bending part, and a second sub-bending part arranged in sequence.

[0010] In the preferred technical solutions of the battery shell, the winding part further comprises a clamping part connected with the first sub-bending part, and the clamping part is accommodated in the interior of the second sub-bending part.

[0011] In the preferred technical solutions of the battery shell, the winding part further comprises an extension part connected with the third sub-bending part, and the extension part is accommodated in the interior of the clamping part.

[0012] In the preferred technical solutions of the battery shell, the clamping part is in U shape.

[0013] In the preferred technical solutions of the battery shell, the winding part further comprises a first connecting part, a first end of the first connecting part is connected with the clamping part, and a second end of the first connecting part is connected with the first sub-bending part; and / or, the winding part further comprises a second connecting part, a first end of the second connecting part is connected with the extension part, and a second end of the second connecting part is connected with the third sub-bending part.

[0014] In the preferred technical solutions of the battery shell, the first protruding part comprises the first sub-bending part, the first connecting part and the clamping part, the second protruding part comprises the second sub-bending part, and the edge of the partition plate comprises the third sub-bending part, the second connecting part and the extension part.

[0015] In the preferred technical solutions of the battery shell, a sealant is arranged between the end surface of the extension part and the inner surface of the clamping part; and / or, a sealant is arranged between the end surface of the second sub-bending part and the third sub-bending part and the second connecting part.

[0016] In the second aspect, the utility model further provides a battery, the battery includes the battery shell. BRIEF DESCRIPTION OF DRAWINGS

[0017] Preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0018] Figure 1 is the perspective view of the battery shell of the utility model;

[0019] Figure 2 is Figure 1 the top view of the battery shell of the utility model shown in the figure;

[0020] Figure 3 is Figure 2 the sectional view along A-A line of the battery shell of the utility model shown in the figure;

[0021] Figure 4 is Figure 3The utility model discloses a battery shell's B part's partial close -up.

[0022] List of reference signs:

[0023] 100, battery shell; 1, first shell; 11, first protruding part; 111, first sub-bending part; 112, clamping part; 113, first connecting part; 2, second shell; 21, second protruding part; 211, second sub-bending part; 3, partition; 31, edge; 311, third sub-bending part; 312, extension; 313, second connecting part; 4, winding part. DETAILED DESCRIPTION

[0024] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0025] It should be noted that in the description of the utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "back" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the 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 descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In one embodiment, as Figures 1 to 4 shown, a battery shell 100 of the utility model, including first shell 1, second shell 2 and partition 3, the partition 3 is arranged between the first shell 1 and the second shell 2.

[0028] Preferably, the first shell 1 can be a rectangular parallelepiped, or a cylinder, or other geometric bodies, etc., the specific shape of the selection can be set according to the needs, which is not specifically limited here; further, the first shell 1 can be made of aluminum, or made of steel or other materials, etc., which is not specifically limited here.

[0029] More preferably, the first shell 1 is preferably integrally formed, such as by stamping, etc. Further, the first shell 1 is provided with an opening for accommodating the battery cell.

[0030] More preferably, the second shell 2 can be a cuboid, or a cylinder, or other geometric body, etc., and the specific shape thereof can be set as required, which is not specifically limited herein. The shape of the second shell 2 is preferably the same as that of the first shell 1. Further, the second shell 2 can be made of aluminum material, or steel or other materials, etc., which is not specifically limited herein.

[0031] Further preferably, the second shell 2 is preferably integrally formed, such as by stamping, etc. Further, the second shell 2 is provided with an opening for accommodating the battery cell.

[0032] Further, the partition plate 3 is a flat plate, which can be rectangular, or circular or other geometric shapes, etc. Further, the partition plate 3 can be made of aluminum material, or steel or other materials, etc.

[0033] Further, the partition plate 3 is arranged between the first shell 1 and the second shell 2, the opening of the first shell 1 is opposite to the partition plate 3, and the opening of the second shell 2 is opposite to the partition plate 3, so that the first shell 1 and the partition plate 3, and the second shell 2 and the partition plate 3 form closed cavities for accommodating the battery cell, and realize the stable connection of the three. Preferably, the first shell 1, the partition plate 3 and the second shell 2 are preferably arranged in sequence along the thickness direction of the battery shell 100.

[0034] In an embodiment, the first shell 1 comprises a first protruding portion 11, the second shell 2 comprises a second protruding portion 21, and the edge 31 of the partition plate 3 is between the first protruding portion 11 and the second protruding portion 21, and the first protruding portion 11, the edge 31 of the partition plate 3 and the second protruding portion 21 are bent to form the winding portion 4.

[0035] Preferably, the first protruding portion 11 is arranged around the opening of the first shell 1, and the first protruding portion 11 is formed by extending from the opening edge of the first shell 1 towards the outside. The first protruding portion 11 and the first shell 1 can be integrally formed, or can be arranged separately, etc., which is not specifically limited herein.

[0036] More preferably, the second protruding portion 21 is arranged around the opening of the second shell 2, and the second protruding portion 21 is formed by extending from the opening edge of the second shell 2 towards the outside. The second protruding portion 21 and the second shell 2 can be integrally formed, or can be arranged separately, etc., which is not specifically limited herein.

[0037] More preferably, the edge 31 of the partition plate 3 is between the first protruding portion 11 and the second protruding portion 21 and arranged together, so as to facilitate the connection of the three.

[0038] Further preferably, the first protruding part 11, the edge 31 of the partition plate 3 and the second protruding part 21 are arranged and bent to form the winding part 4, so as to realize the stable connection of the three parts, and further realize the stable connection of the first shell 1, the partition plate 3 and the second shell 2.

[0039] Still further, the winding part 4 can be bent and wound in a direction away from the second protruding part 21 towards the first protruding part 11, or in a direction away from the first protruding part 11 towards the second protruding part 21, etc.

[0040] In an embodiment, the winding part 4 comprises a bending part, which is in a U shape, as shown in Figure 3 and Figure 4 .

[0041] Preferably, the design of the bending part in a U shape makes it more convenient to bend, and can be compacted from both sides in the thickness direction, so as to enhance the fastening effect and facilitate the enhancement of structural stability.

[0042] More preferably, the bending part can also be in other geometric shapes, such as a cylindrical shape, etc., which can be selected and arranged according to the needs of the user, and is not specifically limited here.

[0043] In an embodiment, the bending part comprises a first sub-bending part 111, a third sub-bending part 311 and a second sub-bending part 211 arranged in sequence, as shown in Figure 4 .

[0044] Preferably, the first sub-bending part 111 is connected with the edge of the opening of the first shell 1, preferably integrally formed, etc., and the first sub-bending part 111 is in a U shape.

[0045] More preferably, the second sub-bending part 211 is connected with the edge of the opening of the second shell 2, preferably integrally formed, etc., and the second sub-bending part 211 is in a U shape.

[0046] Still more preferably, the third sub-bending part 311 is arranged on the partition plate 3 and is part of the edge 31 of the partition plate 3, and the third sub-bending part 311 is in a U shape.

[0047] Further preferably, the third sub-bending part 311 is accommodated in the interior of the first sub-bending part 111, and the outer surface of the third sub-bending part 311 is attached to the inner surface of the first sub-bending part 111.

[0048] Still further, the second sub-bending part 211 is accommodated in the interior of the third sub-bending part 311, and the outer surface of the second sub-bending part 211 is attached to the inner surface of the third sub-bending part 311, so as to facilitate the bending and winding of the three parts to form the winding part 4.

[0049] In an embodiment, the winding part 4 further comprises a clamping part 112 connected with the first sub-bending part 111, and the clamping part 112 is accommodated in the interior of the second sub-bending part 211.

[0050] Preferably, the clamping part 112 is connected with the first sub-bending part 111, and the clamping part 112 and the first sub-bending part 111 can be directly fixedly connected or indirectly fixedly connected, such as being connected through a connecting piece.

[0051] More preferably, the clamping part 112 and the first sub-bending part 111 can be integrally formed or separately arranged, which is not specifically limited herein.

[0052] Further preferably, the clamping part 112 is accommodated in the interior of the second sub-bending part 211, and the outer surface of the clamping part 112 is attached to the inner surface of the second sub-bending part 211, so as to enhance the structural stability of the two.

[0053] Further preferably, the clamping part 112 can be entirely accommodated in the interior of the second sub-bending part 211 or partially accommodated in the interior of the second sub-bending part 211, which is not specifically limited herein.

[0054] In an embodiment, the winding part 4 further comprises an extension part 312 connected with the third sub-bending part 311, and the extension part 312 is accommodated in the interior of the clamping part 112, as shown in Figure 4 .

[0055] Preferably, the extension part 312 is connected with the third sub-bending part 311, which can be directly fixedly connected or indirectly fixedly connected, such as being connected through a connecting piece, and the selection of the connection mode can be set as required, which is not specifically limited herein.

[0056] More preferably, the extension part 312 and the third sub-bending part 311 can be integrally formed or separately arranged, which is not specifically limited herein.

[0057] Further preferably, the extension part 312 is in the form of a flat plate, which can be rectangular or circular, and the selection of the specific shape can be set as required.

[0058] Further preferably, the extension part 312 is accommodated in the interior of the clamping part 112, and the extension part 312 is attached to the inner surface of the clamping part 112, so as to enhance the structural stability thereof.

[0059] In an embodiment, the clamping part 112 is in the form of a U-shaped, as shown in Figure 4 .

[0060] Preferably, the clamping portion 112 is in a U-shape, so as to match the U-shape of the bending portion, to make it more compact in the thickness direction, and to make the structural stability more ideal.

[0061] More preferably, the clamping portion 112 can also be in other geometric shapes, etc., which are not specifically limited here.

[0062] In an embodiment, the winding portion 4 further comprises a first connecting portion 113, a first end of the first connecting portion 113 being connected with the clamping portion 112, and a second end of the first connecting portion 113 being connected with the first sub-bending portion 111, as shown in the figure. Figure 4

[0063] Preferably, the first connecting portion 113 is in a curved shape, which can also be in other geometric shapes, etc., which are not specifically limited here.

[0064] More preferably, the first connecting portion 113 is between the first sub-bending portion 111 and the clamping portion 112, so as to realize the connection of the two.

[0065] Further preferably, the first connecting portion 113 is fixedly connected with the first sub-bending portion 111, and the two can be integrally formed, or can be fixed by welding, bonding, etc.

[0066] Further preferably, the first connecting portion 113 is fixedly connected with the clamping portion 112, and the two can be integrally formed, or can be fixed by welding, bonding, etc.

[0067] Further, the first connecting portion 113 is at least partially attached to the outer surface of the second shell 2, so as to save space and improve the structural stability.

[0068] In an embodiment, the winding portion 4 further comprises a second connecting portion 313, a first end of the second connecting portion 313 being connected with the extending portion 312, and a second end of the second connecting portion 313 being connected with the third sub-bending portion 311.

[0069] Preferably, the second connecting portion 313 is in a curved shape, which can also be in other geometric shapes, etc., which are not specifically limited here.

[0070] More preferably, the second connecting portion 313 is between the third sub-bending portion 311 and the extending portion 312, so as to realize the connection of the two.

[0071] Further preferably, the first end of the second connecting portion 313 is fixedly connected with the extending portion 312, and the two can be integrally formed, or can be fixed by welding, bonding, etc., which are not specifically limited here.

[0072] ​Further preferably, the second end of the second connecting portion 313 is fixedly connected with the third sub-bending portion 311, and the two can be integrally formed or connected by welding, bonding or other fixing methods, which are not specifically limited here.

[0073] In an embodiment, the first protruding portion 11 includes the first sub-bending portion 111, the first connecting portion 113 and the clamping portion 112, the second protruding portion 21 includes the second sub-bending portion 211, and the edge 31 of the partition plate 3 includes the third sub-bending portion 311, the second connecting portion 313 and the extending portion 312, as shown in Figure 4 .

[0074] Preferably, the first sub-bending portion 111, the first connecting portion 113 and the clamping portion 112 are arranged in sequence and connected together, and the three are preferably integrally formed or fixedly connected with each other, which are not specifically limited here.

[0075] More preferably, the second sub-bending portion 211 and the second shell 2 are preferably integrally formed or separately arranged and fixedly connected with each other, which are not specifically limited here.

[0076] Further preferably, the third sub-bending portion 311, the second connecting portion 313 and the extending portion 312 are arranged in sequence and connected together, and the three are preferably integrally formed or fixedly connected with each other, which are not specifically limited here.

[0077] In an embodiment, a sealant (not shown) is arranged between the end surface of the extending portion 312 and the inner surface of the clamping portion 112.

[0078] Preferably, the sealant is filled in the gap between the end surface of the extending portion 312 and the inner surface of the clamping portion 312, thereby enhancing the structural strength and improving the structural stability of the two.

[0079] More preferably, the sealant is made of polyurethane or other materials, which has significant sealing and connecting effect and low cost, and is suitable for popularization and application.

[0080] In an embodiment, a sealant is arranged between the end surface of the second sub-bending portion 211 and the second connecting portion 313.

[0081] Preferably, the sealant is filled in the gap between the end surface of the second sub-bending portion 211 and the inner surface of the second connecting portion 313, thereby enhancing the structural strength and improving the structural stability of the two.

[0082] More preferably, the sealant is also filled in the gap between the end surface of the third sub-bending portion 311 and the inner surface of the second connecting portion 313, thereby enhancing the structural strength and improving the structural stability of the two.

[0083] Preferably, the sealing glue is made of polyurethane or the like, which has remarkable sealing and connecting effects and low cost, and is suitable for popularization and application.

[0084] In one embodiment, the first protrusion 11, the edge 31 of the partition plate 3 and the second protrusion 21 are welded after being bent to form the winding part 4.

[0085] Preferably, the first protrusion 11, the edge 31 of the partition plate 3 and the second protrusion 21 are welded after being bent to form the winding part 4, and the welding points can be located on the first sub-bending part 111, the second sub-bending part 211, the third sub-bending part 311 or the like, or the first connecting part 113, the second connecting part 313, the extending part 312, the clamping part 112 or the like, and the specific welding position can be set as required, which is not limited herein, so as to enhance the structural stability of the winding part 4.

[0086] In one embodiment, the utility model also provides a battery, the battery includes the above-mentioned battery shell 100.

[0087] Preferably, by adopting the above-mentioned battery shell 100, the fixed connection and sealing between the first shell 1, the partition plate 3 and the second shell 2 can be effectively realized, the service life of the battery is prolonged, and the leakage of electrolyte is prevented.

[0088] More preferably, the battery further includes a battery cell between the first shell 1 and the partition plate 3 and a battery cell between the second shell 2 and the partition plate 3, which are prior art and will not be described herein.

[0089] Those skilled in the art will understand that although some embodiments described herein include certain features not included in other embodiments, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0090] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the utility model, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A battery case comprising a first case, a second case, and a separator provided between the first case and the second case, characterized by, The first shell comprises a first protruding part, the second shell comprises a second protruding part, and the edge of the partition plate is between the first protruding part and the second protruding part, and the first protruding part, the edge of the partition plate and the second protruding part are bent to form a winding part.

2. The battery case according to claim 1, wherein The winding part comprises a bending part, and the bending part is in a U shape.

3. The battery case according to claim 2, characterized by The bending part comprises a first sub-bending part, a third sub-bending part and a second sub-bending part arranged in sequence.

4. The battery case according to claim 3, characterized by The winding part further comprises a clamping part connected with the first sub-bending part, and the clamping part is accommodated in the interior of the second sub-bending part.

5. The battery case according to claim 4, wherein The winding part further comprises an extension part connected with the third sub-bending part, and the extension part is accommodated in the interior of the clamping part.

6. The battery case of claim 5, wherein, The clamping part is in a U shape.

7. The battery case of claim 6, wherein, The winding part further comprises a first connecting part, a first end of the first connecting part is connected with the clamping part, and a second end of the first connecting part is connected with the first sub-bending part. And / or, the winding part further comprises a second connecting part, a first end of the second connecting part is connected with the extension part, and a second end of the second connecting part is connected with the third sub-bending part.

8. The battery case of claim 7, wherein, The first protruding part comprises the first sub-bending part, the first connecting part and the clamping part, the second protruding part comprises the second sub-bending part, and the edge of the partition plate comprises the third sub-bending part, the second connecting part and the extension part.

9. The battery case of claim 8, wherein, A sealant is arranged between an end surface of the extension part and an inner surface of the clamping part. And / or, a sealant is arranged between end surfaces of the second sub-bending part and the third sub-bending part and the second connecting part.

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

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