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 shell, a partition plate and a second shell in the prior art. Therefore, the utility model provides the battery shell, the battery shell comprises a first shell, a second shell and a partition plate arranged between the first shell and the second shell, the first shell is provided with a first frame, the second shell is provided with a second frame, the partition plate is provided with a third frame, the third frame is accommodated in the first frame, and the second frame is accommodated in the third frame. The end faces of the first frame, the second frame and the third frame are provided with welding parts. The third frame is accommodated in the second frame, and the second frame is accommodated in the third frame, so that the first shell, the partition plate and the second shell are positioned and assembled, and the end surfaces of the first shell, the partition plate and the second shell are welded to form the welding part, so that the first shell, the partition plate and the second shell are stably connected and sealed, the structural stability is ensured, and electrolyte leakage is prevented.

Description

TECHNICAL FIELD

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

[0002] With the gradual exhaustion of traditional energy and the requirement of sustainable development, the new energy industry has developed rapidly in recent years, which includes lithium batteries.

[0003] The traditional lithium battery usually includes a shell, a battery cell received in the shell, and a closed single cavity inside the shell. In order to improve the energy density of the battery, two cavities can be provided in the shell to accommodate two battery cells respectively, thereby improving the space utilization and achieving the improvement of energy density. The double-cavity shell includes a first shell, a second shell, and a partition plate provided between the first shell and the second shell. However, how to fix and seal the first shell, the partition plate, and the second shell becomes a technical problem that needs to be solved urgently. SUMMARY

[0004] The utility model aims at solving the above technical problem, i.e., solving the fixing and sealing problem of the existing first shell, partition plate, and second shell.

[0005] In a first aspect, the utility model provides a battery shell, which includes a first shell, a second shell, and a partition plate provided between the first shell and the second shell. The first shell is provided with a first frame, the second shell is provided with a second frame, the partition plate is provided with a third frame, the third frame is received in the first frame, the second frame is received in the third frame, and the end faces of the first frame, the third frame, and the second frame are provided with a fusion joint.

[0006] In the above technical solution, the third frame is received in the second frame, and the second frame is received in the third frame to realize the positioning and assembly of the first shell, the partition plate, and the second shell. The fusion joint formed by welding the end faces of the above three parts realizes the stable connection and sealing of the three parts, ensures the stability of the structure, and prevents the leakage of electrolyte.

[0007] In the preferred technical solution of the above battery shell, the outer surface of the third frame abuts against the inner surface of the first frame.

[0008] In the preferred technical solution of the above battery shell, the outer surface of the second frame abuts against the inner surface of the third frame.

[0009] In the preferred technical solution of the above battery shell, the end face of the first frame and the end face of the third frame are at the same height.

[0010] In the preferred technical scheme of the battery shell, the end surface of the second frame is at the same height as the end surface of the third frame.

[0011] In the preferred technical scheme of the battery shell, the first frame surrounds the opening of the first shell.

[0012] In the preferred technical scheme of the battery shell, the second frame surrounds the opening of the second shell.

[0013] In the preferred technical scheme of the battery shell, the cross section of the first frame is "L" shaped; and / or, the cross section of the second frame is "U" shaped.

[0014] In the preferred technical scheme of the battery shell, the cross section of the third frame is "L" shaped.

[0015] In a second aspect, the utility model also provides a battery, the battery includes the battery shell. BRIEF DESCRIPTION OF DRAWINGS

[0016] Preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0017] Figure 1 is the battery shell of the utility model;

[0018] Figure 2 is Figure 1 the battery shell of the utility model shown in the figure;

[0019] Figure 3 is Figure 1 the partial enlarged view of A part of the battery shell of the utility model shown in the figure;

[0020] Figure 4 is the partial sectional view of the battery shell of the utility model;

[0021] Figure 5 is Figure 4 the partial enlarged view of B part of the battery shell of the utility model shown in the figure;

[0022] Figure 6 is Figure 5 the partial enlarged view of the battery shell of the utility model after welding.

[0023] LIST OF REFERENCE NUMBERS

[0024] 100, battery shell; 1, first shell; 11, first frame; 2, second shell; 21, second frame; 3, partition plate; 31, third frame; 111, 211, 311, end surface; 4, fusion portion. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0026] It should be noted that in the description of the present application, 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 does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should be further noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "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 present application can be understood according to the specific circumstances.

[0028] In one embodiment, as shown in Figures 1 to 6 The battery shell 100 of the present application comprises a first shell 1, a second shell 2, and a partition plate 3 provided between the first shell 1 and the second shell 2.

[0029] Preferably, the first shell 1 can be a rectangular parallelepiped, or a cylinder or other geometric body, etc.; further, the first shell 1 can be an aluminum shell, or a steel shell or made of other materials, etc., which is not specifically limited here.

[0030] More preferably, the second shell 2 can be a rectangular parallelepiped, or a cylinder or other geometric body, etc.; further, the second shell 2 can be an aluminum shell, or a steel shell or made of other materials, etc., which is not specifically limited here.

[0031] Further preferably, the partition plate 3 can be rectangular, or circular or other geometric shapes, etc.; further, the partition plate 3 can be an aluminum plate, or a steel plate or made of other materials, etc., which is not specifically limited here.

[0032] Further preferably, the first shell 1 and the second shell 2 are oppositely arranged along the thickness direction of the battery shell 100, and the opening of the first shell 1 and the opening of the second shell 2 are oppositely arranged, so as to form an internally closed cavity.

[0033] Further, the partition plate 3 is between the first shell 1 and the second shell 2 in the thickness direction of the battery shell 100, one surface of the partition plate 3 is opposite to the opening of the first shell 1 and the other surface is opposite to the opening of the second shell 2.

[0034] Further, the partition plate 3 is fixedly connected with the first shell 1 and blocks the opening of the first shell 1, so that a closed cavity is formed between the partition plate 3 and the first shell 1 to accommodate the battery cell and the electrolyte. Preferably, the partition plate 3 and the first shell 1 can be fixedly connected by welding or the like.

[0035] Further, the partition plate 3 is fixedly connected with the second shell 2 and blocks the opening of the second shell 2, so that a closed cavity is formed between the partition plate 3 and the second shell 2 to accommodate the battery cell and the electrolyte. Preferably, the partition plate 3 and the second shell 2 can be fixedly connected by welding or the like.

[0036] In an embodiment, the first shell 1 is provided with a first frame 11, the second shell 2 is provided with a second frame 21, and the partition plate 3 is provided with a third frame 31, the third frame 31 is accommodated in the first frame 11, and the second frame 21 is accommodated in the third frame 31, as shown in Figures 4 to 6 .

[0037] Preferably, the first frame 11 is arranged around the opening of the first shell 1, and an inner cavity is formed inside the first frame 11 to accommodate the third frame 31 and the second frame 21. Preferably, the first frame 11 is fixedly connected with the first shell 1, such as welding or one-piece forming, and in this embodiment, the first frame 11 is one-piece formed with the first shell 1, thereby simplifying the process and improving the structural stability.

[0038] More preferably, the second frame 21 is arranged around the opening of the second shell 2, and the second frame 21 is fixedly connected with the second shell 2, such as welding or one-piece forming, and in this embodiment, the second frame 21 is one-piece formed with the second shell 2, thereby simplifying the process and improving the structural stability.

[0039] Further preferably, the third frame 31 is arranged around the partition plate 3, and the third frame 31 is fixedly connected with the partition plate 3, such as welding or one-piece forming, and in this embodiment, the third frame 31 is one-piece formed with the partition plate 3, thereby simplifying the process and improving the structural stability.

[0040] Further preferably, the first frame 11 extends from the edge of the first shell 1 towards the second shell 2, the third frame 31 extends from the edge of the partition plate 3 towards the second shell 2, and the third frame 31 is accommodated in the first frame 11, thereby increasing the contact area of the two, improving the stability and sealing performance of the connection of the two.

[0041] Further, the second frame 21 extends from the edge of the second shell 2 towards the direction away from the first shell 1, and is accommodated in the third frame 31, so as to increase the contact area of the two, and improve the stability and sealing of the connection of the two.

[0042] In an embodiment, the end surface of the first frame 11, the third frame 31 and the second frame 21 is provided with a welding portion 4, as shown in Figure 6 .

[0043] Preferably, the end surfaces of the first frame 11, the third frame 31 and the second frame 21 are close to each other and are welded and fixed, forming the welding portion 4, so as to realize the stable connection of the three, and ensure the sealing effect between the three, preventing the internal electrolyte from leaking.

[0044] More preferably, when welding, the gap between the first frame 11 and the third frame 31, and the gap between the second frame 21 and the third frame 31 are simultaneously seam welded, so as to form the welding portion 4, realize the stable connection of the three, and ensure the stability and sealing of the structure.

[0045] Still more preferably, the welding portion 4 is arranged around the first shell 1 and the second shell 2, so as to realize the fixation and sealing of the first frame 11, the second frame 21 and the third frame 31 in all directions 360 degrees, effectively preventing the internal electrolyte from leaking.

[0046] In an embodiment, the outer surface of the third frame 31 abuts against the inner surface of the first frame 11, as shown in Figures 4 to 6 .

[0047] Preferably, the third frame 31 is accommodated in the first frame 11, and the outer surface of the third frame 31 abuts against the inner surface of the first frame 11, so as to increase the contact area of the two, and improve the structural stability and sealing of the two.

[0048] More preferably, the third frame 31 can be completely accommodated in the first frame 11, or can be partially accommodated in the first frame 11, such as the upper end of the third frame 31 protruding from the first frame 11.

[0049] Still more preferably, the outer surface of the third frame 31 can abut against the inner surface of the first frame 11, or can partially abut against the inner surface of the first frame 11, which is not specifically limited here.

[0050] Further preferably, a gap can be provided between the outer surface of the third frame 31 and the inner surface of the first frame 11, and a sealing glue or a fixing glue can be arranged in the gap, so as to enhance the connection strength or the sealing of the two.

[0051] In an embodiment, the outer surface of the second frame 21 abuts against the inner surface of the third frame 31, as shown in Figures 4 to 6

[0052] Preferably, the second frame 21 is accommodated in the third frame 31, and the outer surface of the second frame 21 abuts against the inner surface of the third frame 31, so as to increase the contact area between them, and improve the structural stability and sealing performance of them.

[0053] More preferably, the second frame 21 can be completely accommodated in the third frame 31, or can be partially accommodated in the third frame 31, such as the upper end of the second frame 21 protruding out of the third frame 31.

[0054] Further preferably, the outer surface of the second frame 21 can abut against the inner surface of the third frame 31, or can partially abut against the inner surface of the third frame 31, which is not specifically limited herein.

[0055] Further preferably, there can be a gap between the outer surface of the second frame 21 and the inner surface of the third frame 31, and the gap can be filled with sealant or fixing glue, so as to enhance the connection strength and sealing performance of them.

[0056] In an embodiment, the end surface 111 of the first frame 11 is at the same height as the end surface 311 of the third frame 31, as shown in Figure 5 and Figure 6 .

[0057] Preferably, the end surface 111 of the first frame 11 is the end surface of the first frame 11 away from the first shell 1.

[0058] More preferably, the end surface 311 of the third frame 31 is the end surface of the third frame 31 away from the partition plate 3.

[0059] Further preferably, the end surface 111 of the first frame 11 and the end surface 311 of the third frame 31 are both flat surfaces and are at the same height, so as to facilitate the gap between them to be sealed by seam welding, reduce the process difficulty, and ensure the welding strength and sealing effect.

[0060] It should be noted that the end surface 111 of the first frame 11 and the end surface 311 of the third frame 31 can not only be flat surfaces, but also can be curved surfaces or wavy surfaces, which are not specifically limited herein.

[0061] In an embodiment, the end surface 211 of the second frame 21 is at the same height as the end surface 311 of the third frame 31, as shown in Figure 5 and Figure 6 .

[0062] Preferably, the end surface 211 of the second frame 21 is the end surface of the second frame 21 away from the second shell 2.​

[0063] More preferably, the end surface 211 of the second frame 21 is a plane, and the end surface 211 of the second frame 21 is at the same height as the end surface 311 of the third frame 31, so as to facilitate the gap between the two to be sealed and welded, reduce the process difficulty, and ensure the welding strength and sealing effect.

[0064] It should be noted that the end surface 211 of the second frame 21 can be a plane, an arc surface, or a wavy surface, and is not limited here.

[0065] In an embodiment, the first frame 11 surrounds the opening of the first shell 1.

[0066] Preferably, the first shell 1 is provided with an opening, and the opening faces the second shell 2, so as to put the battery cell through the opening.

[0067] More preferably, when the third frame 31 is accommodated in the first frame 11, the partition plate 3 abuts against the first shell 1 and covers the opening of the first shell 1, so as to seal the opening of the first shell 1, facilitate the accommodation of the battery cell and the electrolyte, and prevent the electrolyte from leaking.

[0068] Further preferably, the first frame 11 is arranged around the opening of the first shell 1, so as to realize the omnidirectional fixation and sealing of the partition plate 3.

[0069] In an embodiment, the second frame 21 surrounds the opening of the second shell 2, as shown in Figure 5 and Figure 6 .

[0070] Preferably, the second shell 2 is provided with an opening, and the opening faces the first shell 1, so as to put the battery cell through the opening.

[0071] More preferably, when the second frame 21 is accommodated in the third frame 31, the partition plate 3 abuts against the second shell 2 and covers the opening of the second shell 2, so as to seal the opening of the second shell 2, facilitate the accommodation of the battery cell and the electrolyte, and prevent the electrolyte from leaking.

[0072] Further preferably, the second frame 21 is arranged around the opening of the second shell 2, so as to realize the omnidirectional fixation and sealing of the partition plate 3.

[0073] In an embodiment, the cross section of the first frame 11 is "L" shaped, as shown in Figure 5 and Figure 6 .

[0074] Preferably, the cross section of the first frame 11 is "L" shaped, which extends from the edge of the first shell 1 to a direction away from the first shell 1, and then extends to the direction of the second shell 2.

[0075] More preferably, the first edge frame 11 is L-shaped, and the first edge frame 11 is configured to form a cavity for accommodating the third edge frame 31.

[0076] It should be noted that in other embodiments, the first edge frame 11 can also have other cross-sectional shapes, which can be set according to needs, and are not limited herein.

[0077] In an embodiment, the second edge frame 21 has a U-shaped cross section.

[0078] Preferably, the second edge frame 21 has a U-shaped cross section, so as to be accommodated in the third edge frame 31 and connected with the third edge frame 31.

[0079] More preferably, the bottom surface of the second edge frame 21 abuts against the surface of the partition 3 away from the first shell 1, so as to support the second shell 2.

[0080] Further preferably, the outer surface of the U-shaped second edge frame 21 is in contact with the third edge frame 31, so as to stably connect the second edge frame 21 and the third edge frame 31, and improve the structural stability and sealing performance.

[0081] In an embodiment, the third edge frame 31 has an L-shaped cross section, as shown in Figs. Figure 5 and Figure 6 .

[0082] Preferably, the third edge frame 31 has an L-shaped cross section, and the third edge frame 31 extends from the edge of the partition 3 to the second shell 2.

[0083] More preferably, the bottom surface of the third edge frame 31 abuts against the inner cavity bottom surface of the first edge frame 11, so as to support the third edge frame 31 and improve the structural strength.

[0084] Further preferably, the outer wall of the third edge frame 31 is clamped between the outer wall of the first edge frame 11 and the outer wall of the second edge frame 21, so as to stably connect the first edge frame 11, the second edge frame 21 and the third edge frame 31, and improve the structural stability and sealing performance.

[0085] In an embodiment, the utility model also provides a battery, the battery comprises the battery shell 100.

[0086] Preferably, the battery further comprises a battery cell between the first shell 1 and the partition 3 and a battery cell between the second shell 2 and the partition 3, which can be a winding core or a stacked core, and is not limited herein.

[0087] More preferably, the first shell 1 and the partition 3, the second shell 2 and the partition 3 also contain electrolyte, so that the function of the battery cell can run smoothly. The setting of the welding part 4 realizes the stable connection and sealing of the first shell 1 and the partition 3, the second shell 2 and the partition 3, effectively preventing the leakage of electrolyte.

[0088] Those skilled in the art will appreciate that a combination of features of different embodiments implies within the scope of the application and forms different embodiments, although some embodiments described herein include certain features rather than others included in other embodiments. For example, in the claims of the application, any of the claimed embodiments can be used in any combination.

[0089] 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 deviating from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A battery case characterized by comprising: The battery case comprises a first case, a second case, a partition plate arranged between the first case and the second case, the first case is provided with a first frame, the second case is provided with a second frame, the partition plate is provided with a third frame, the third frame is accommodated in the first frame, the second frame is accommodated in the third frame, the end faces of the first frame, the third frame and the second frame are provided with fusion parts.

2. The battery case according to claim 1, wherein An outer surface of the third frame abuts against an inner surface of the first frame.

3. The battery case according to claim 2, characterized by An outer surface of the second frame abuts against an inner surface of the third frame.

4. The battery case according to claim 3, characterized by The end face of the first frame is at the same height as the end face of the third frame.

5. The battery case according to claim 4, wherein The end face of the second frame is at the same height as the end face of the third frame.

6. The battery case of claim 5, wherein, The first frame surrounds an opening of the first case.

7. The battery case of claim 6, wherein, The second frame surrounds an opening of the second case.

8. The battery case of claim 6, wherein, A cross section of the first frame is "L" shaped; and / or, a cross section of the second frame is "U" shaped.

9. The battery case of claim 8, wherein, A cross section of the third frame is "L" shaped.

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

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