Battery cell, battery and electric equipment

Abstract

The utility model provides a battery cell, a battery and electric equipment. The battery cell comprises a shell and a battery cell body, an installation cavity is formed in the shell, the battery cell body is installed in the installation cavity, the shell comprises a side wall and at least two first reinforcing ribs, the first reinforcing ribs are connected to the side wall, and the at least two first reinforcing ribs are evenly distributed in the circumferential direction of the battery cell body. According to the battery cell, the side wall of the shell can be effectively prevented from protruding outwards when the battery cell body expands, the diameter of the battery cell is prevented from being increased, the quality of the battery cell is guaranteed, and the percent of pass of the battery cell is guaranteed.

Description

TECHNICAL FIELD

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

[0002] The battery cell is a core component of a battery, and is widely used in energy storage systems, vehicles and consumer electronics.

[0003] In the related art, when the battery cell expands internally, the battery cell will bulge outward and increase in diameter, affecting the quality of the battery cell and causing the battery cell to be unqualified. UTILITY MODEL CONTENT

[0004] Embodiments of the present application provide a battery cell, a battery and an electric device, which can improve the technical problem that the battery cell will bulge outward and increase in diameter when the battery cell expands internally.

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

[0006] a housing formed with a mounting cavity;

[0007] a battery cell body mounted in the mounting cavity;

[0008] The housing comprises a side wall and at least two first reinforcing ribs, the first reinforcing ribs are connected to the side wall, and the at least two first reinforcing ribs are uniformly arranged along the circumference of the battery cell body.

[0009] In an embodiment, the first reinforcing ribs are formed on the inner side wall of the housing, and the first reinforcing ribs abut against the battery cell body.

[0010] In an embodiment, the housing comprises a main body portion and a sealing portion connected to each other, the first reinforcing ribs are formed on the side wall surface of the main body portion, and the first reinforcing ribs are arranged adjacent to or spaced apart from the sealing portion.

[0011] In an embodiment, along the axial direction of the housing, the length of the first reinforcing rib is equal to the length of the main body portion.

[0012] In an embodiment, along the axial direction of the housing, the distance between the end of the end portion of the sealing portion away from the main body portion and the first reinforcing rib is between 6mm and 10mm.

[0013] In an embodiment, along the axial direction of the housing, the length of the first reinforcing rib is greater than or equal to the length of the battery cell body.

[0014] In an embodiment, along the radial direction of the housing, the thickness of the first reinforcing rib is less than half the thickness of the side wall.

[0015] In an embodiment, the first reinforcing rib corresponds to a central angle of 5° to 45° along a circumference of the shell.

[0016] In an embodiment, along a radial direction of the shell, a projection of the first reinforcing rib on the side wall is a first projection, a projection of the cell body on the side wall is a second projection, one end of the first projection is flush with one end of the second projection, and the other end of the first projection protrudes beyond the other end of the second projection.

[0017] In a second aspect, embodiments of the present application provide a battery including the cell described above.

[0018] In a third aspect, embodiments of the present application provide a consumer electronic device including the battery described above.

[0019] The embodiments of the present application have the following beneficial effects:

[0020] In the embodiments of the present application, the first reinforcing rib is connected to the side wall of the shell, which can effectively improve the structural strength of the side wall of the shell, effectively prevent the side wall of the shell from bulging outward when the cell body expands, avoid the increase of the diameter of the cell, ensure the quality of the cell, and ensure the pass rate of the cell. Meanwhile, the at least two first reinforcing ribs are evenly arranged along the circumference of the cell body, and the uniformity of the arrangement of the first reinforcing ribs ensures the uniformity of the strengthening of the structural strength of the side wall of the shell, which is conducive to improving the overall strength of the side wall of the shell and avoiding the situation that some side walls have low strength. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0022] Figure 1 is one of the structural schematic diagrams of the cell provided by the embodiments of the present application;

[0023] Figure 2 is one of the structural schematic diagrams of the shell provided by the embodiments of the present application;

[0024] Figure 3 is the second structural schematic diagram of the shell provided by the embodiments of the present application;

[0025] Figure 4 is the second structural schematic diagram of the cell provided by the embodiments of the present application;

[0026] Figure 5 is a sectional view of an electric core provided by an embodiment of the present application;

[0027] Figure 6 is a sectional view of an electric core provided by an embodiment of the present application Figure 5 is a structural enlarged schematic view at A in FIG. 1. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0029] The electric core, the battery and the electric device of the present application will be described below in conjunction with Figures 1 to 6

[0030] According to the embodiments of the first aspect of the present application, such as Figure 1 , Figure 2 and Figure 3 , the electric core comprises a shell 1 and an electric core body 2, the shell 1 is formed with a mounting cavity 11, and the electric core body 2 is mounted in the mounting cavity 11.

[0031] The shell 1 comprises a side wall 12 and at least two first reinforcing ribs 13, the first reinforcing ribs 13 are connected to the side wall 12, and the at least two first reinforcing ribs 13 are uniformly arranged along the circumference of the electric core body 2.

[0032] According to the electric core of the embodiments of the present application, the first reinforcing ribs 13 are connected to the side wall 12 of the shell 1, which can effectively improve the structural strength of the side wall 12 of the shell 1, effectively prevent the side wall 12 of the shell 1 from bulging outward when the electric core body 2 expands, avoid the increase of the diameter of the electric core, ensure the quality of the electric core, and ensure the qualified rate of the electric core. Meanwhile, the at least two first reinforcing ribs 13 are uniformly arranged along the circumference of the electric core body 2, and the uniformity of the arrangement of the first reinforcing ribs 13 ensures the uniformity of the strengthening of the structural strength of the side wall 12 of the shell 1, which is beneficial to improve the overall strength of the side wall 12 of the shell 1 and avoid the situation that some side walls 12 have low strength.

[0033] ​Exemplarily, the shell 1 comprises four first reinforcing ribs 13, which are evenly arranged along the circumference of the battery body 2.

[0034] In some embodiments, the first reinforcing ribs 13 are formed on the inner side wall of the shell 1, and the first reinforcing ribs 13 abut against the battery body 2.

[0035] It can be understood that the first reinforcing ribs 13 are connected to the side of the side wall 12 facing the battery body 2 and abut against the battery body 2, and the first reinforcing ribs 13 can increase the bending resistance of the inner side wall of the shell 1, and can effectively prevent the side wall 12 from bulging.

[0036] In some examples, the first reinforcing ribs 13 are made of insulating material, or the abutting part of the first reinforcing ribs 13 and the shell 1 is provided with an insulating member, for example, the outer wall surface of the battery body 2 is provided with an insulating layer.

[0037] In some embodiments, as Figure 2 and Figure 3 , the shell 1 comprises a main body part 14 and a sealing part 15 connected to each other, the first reinforcing ribs 13 are formed on the side wall surface of the main body part 14, and the first reinforcing ribs 13 are arranged adjacent to or spaced apart from the sealing part 15.

[0038] It can be understood that the first reinforcing ribs 13 are arranged on the side wall surface of the main body part 14, and the first reinforcing ribs 13 are not arranged on the sealing part 15. Further, while the structural strength of the side wall 12 of the shell 1 is improved by the first reinforcing ribs 13, the sealing of the shell 1 is not affected.

[0039] After the battery is formed, the sealing part 15 will be bent towards the center of the mounting cavity 11. That is, mainly the main body part 14 will be bulged due to the expansion force of the battery body 2, and the first reinforcing ribs 13 are arranged on the main body part 14 to improve the structural strength of the main body part 14, and the first reinforcing ribs 13 are not arranged on the sealing part 15 to avoid affecting the sealing operation of the shell 1 due to the increase of the structural strength of the sealing part 15.

[0040] In some embodiments, as Figure 1 and Figure 2 , along the axial direction of the shell 1, the length of the first reinforcing ribs 13 is equal to the length of the main body part 14.

[0041] It can be understood that the first reinforcing rib 13 is connected to the main body part 14, and the axial length of the first reinforcing rib 13 is equal to the axial length of the main body part 14, which means that one end of the first reinforcing rib 13 is flush with one end of the main body part 14, and the other end of the first reinforcing rib 13 extends along the axial direction of the main body part 14 and is flush with the other end of the main body part 14, so that the axial length of the main body part 14 can be effectively reinforced by the first reinforcing rib 13, and the structural reinforcement effect of the main body part 14 is ensured, so that the main body part 14 can effectively resist the expansion force of the battery core body 2 without bulging deformation.

[0042] In some embodiments, along the axial direction of the shell 1, the distance between the end of the one end of the sealing part 15 away from the main body part 14 and the first reinforcing rib 13 is between 6mm and 10mm.

[0043] It can be understood that if the distance between the end of the one end of the sealing part 15 away from the main body part 14 and the first reinforcing rib 13 is less than 6mm, the shell 1 may need to bend the first reinforcing rib 13 when sealing, which makes it difficult for the shell 1 to be sealed. If the distance between the end of the one end of the sealing part 15 away from the main body part 14 and the first reinforcing rib 13 is greater than 10mm, after the shell 1 is sealed, there will still be part of the side wall of the shell 1 without the first reinforcing rib 13, which is easy to cause the structural strength of the side wall of the shell 1 to be insufficient. Therefore, the distance between the end of the one end of the sealing part 15 away from the main body part 14 and the first reinforcing rib 13 is set to be between 6mm and 10mm, which ensures that the shell 1 can be smoothly sealed while ensuring the structural strength of the side wall of the shell 1.

[0044] For example, the distance between the end of the one end of the sealing part 15 away from the main body part 14 and the first reinforcing rib 13 is 8mm.

[0045] In some embodiments, along the axial direction of the shell 1, the length of the first reinforcing rib 13 is greater than or equal to the length of the battery core body 2.

[0046] It can be understood that the length of the side wall 12 connected with the first reinforcing rib 13 will be greater than or equal to the length of the battery core body 2, and the first reinforcing rib 13 can effectively enhance the structural strength of the side wall 12.

[0047] In some embodiments, along the radial direction of the shell 1, the thickness of the first reinforcing rib 13 is less than half of the thickness of the side wall 12.

[0048] It can be understood that if the thickness of the first reinforcing rib 13 is greater than half of the thickness of the side wall 12, the thickness of the first reinforcing rib 13 may be relatively large, which may affect the diameter of the battery core. Therefore, the thickness of the first reinforcing rib 13 is set to be less than half of the thickness of the side wall 12, which can enhance the structural strength of the side wall 12 while avoiding the diameter of the battery core being too large.

[0049] In some embodiments, the first reinforcing rib 13 corresponds to a central angle of 5° to 45° along the circumference of the shell 1.

[0050] It can be understood that if the first reinforcing rib 13 corresponds to a central angle less than 5°, the first reinforcing rib 13 can be difficult to effectively structurally reinforce the side wall 12. If the first reinforcing rib 13 corresponds to a central angle greater than 45°, it is not conducive to the formation of the first reinforcing rib 13, increasing the difficulty of manufacturing the shell 1. Therefore, the present application sets the central angle of the first reinforcing rib 13 to be between 5° and 45°, which ensures that the first reinforcing rib 13 can effectively improve the structural strength of the side wall 12, while not increasing the difficulty of manufacturing the shell 1.

[0051] For example, the first reinforcing rib 13 corresponds to a central angle of 25°.

[0052] In some embodiments, along the radial direction of the shell 1, the normal projection of the first reinforcing rib 13 on the side wall 12 is a first projection, and the normal projection of the battery core body 2 on the side wall 12 is a second projection. One end of the first projection is flush with one end of the second projection, and the other end of the first projection protrudes beyond the other end of the second projection.

[0053] It can be understood that the first reinforcing rib 13 protrudes from the battery core body 2, that is, the axial length of the side wall 12 provided with the first reinforcing rib 13 is greater than the length of the battery core body 2, and at the corresponding position of the battery core body 2, the side wall 12 is connected with the first reinforcing rib 13. In this way, the structural strength of the side wall 12 can be effectively improved, and the side wall 12 where the expansion force of the battery core body 2 is applied is provided with the first reinforcing rib 13 to improve the structural strength, which can effectively prevent the side wall 12 from protruding.

[0054] In some embodiments, as shown in Figure 4 and Figure 5 The inner bottom wall of the shell 1 is formed with at least two second reinforcing ribs 16, and the at least two second reinforcing ribs 16 are uniformly arranged along the circumference of the center point of the inner bottom wall of the shell 1.

[0055] It can be understood that by forming the second reinforcing rib 16 on the inner bottom wall of the shell 1, the second reinforcing rib 16 can effectively improve the structural strength of the inner bottom wall of the shell 1, effectively prevent the inner bottom wall of the shell 1 from protruding outward when the battery core body 2 expands, avoid the increase of the height of the battery core, ensure the quality of the battery core, and ensure the qualification rate of the battery core. At the same time, the at least two second reinforcing ribs 16 are uniformly arranged along the circumference of the neutral point of the inner bottom wall, and the uniformity of the arrangement of the second reinforcing ribs 16 ensures the uniformity of the strengthening of the structural strength of the inner bottom wall of the shell 1, which is conducive to improving the overall strength of the inner bottom wall of the shell 1 and avoiding the situation that part of the inner bottom wall has low strength.

[0056] In some embodiments, as shown in Figure 4 and Figure 5 The second reinforcing rib 16 is spaced apart from the edge of the bottom wall of the shell 1.

[0057] It can be understood that there is a certain distance between the second reinforcing rib 16 and the edge of the bottom wall of the shell 1, which facilitates the formation of the second reinforcing rib 16 and does not affect the edge of the bottom wall.

[0058] It can be understood that the edge of the bottom wall is half of a circular arc structure. If the second reinforcing rib 16 is connected to the edge of the bottom wall, it may affect the edge of the bottom wall when the second reinforcing rib 16 is formed by stamping, thereby affecting the overall structure of the shell 1.

[0059] In some embodiments, along the axial direction of the shell 1, the orthographic projection of the second reinforcing rib 16 on the bottom wall of the shell 1 is located within the orthographic projection of the battery cell body 2 on the bottom wall of the shell 1.

[0060] It can be understood that the second reinforcing rib 16 is directly opposite the battery cell body 2, that is, the part of the inner bottom wall provided with the second reinforcing rib 16 is also directly opposite the battery cell body 2, and the structure of the part of the inner bottom wall provided with the second reinforcing rib 16 is stronger. That is, the present application provides the second reinforcing rib 16 at the part of the inner bottom wall that will be affected by the expansion force of the battery cell body 2, thereby effectively preventing the inner bottom wall from being raised under the action of the expansion force of the battery cell body 2.

[0061] In some embodiments, as shown in Figure 4 and Figure 5 The second reinforcing rib 16 is an arc-shaped reinforcing rib, and a gap 17 is provided between adjacent two arc-shaped reinforcing ribs, and the width of the gap 17 is constant along the radial direction of the shell 1.

[0062] It can be understood that when the second reinforcing rib 16 is arc-shaped, the area of the inner bottom wall provided with the second reinforcing rib 16 can be increased, that is, the arc-shaped reinforcing rib can more effectively improve the structural strength of the inner bottom wall of the shell 1.

[0063] The width of the gap 17 between adjacent two arc-shaped reinforcing ribs is constant, which can improve the uniformity of the structural strength of the inner bottom wall of the shell 1.

[0064] In some embodiments, the inner diameter of the second reinforcing rib 16 is greater than 6 mm.

[0065] It can be understood that in the full-tab battery cell, the battery cell body 2 includes a negative bus plate 3, and the negative bus plate 3 needs to be connected with the shell 1. If the inner diameter of the second reinforcing rib 16 is less than 6 mm, the second reinforcing rib 16 will interfere with the installation and connection of the negative bus plate 3. Therefore, the inner diameter of the second reinforcing rib 16 is greater than 6 mm in the application, which ensures the structural strength of the inner bottom wall of the shell 1 and avoids interference with the negative bus plate 3.

[0066] In some embodiments, the outer diameter of the second reinforcing rib 16 is L1, and the diameter of the battery cell body 2 is L2, wherein L1 < L2-2 mm.

[0067] It can be understood that if the outer diameter of the second reinforcing rib 16 is greater than the diameter of the battery cell body 2, the second reinforcing rib 16 will extend to the fillet of the bottom wall of the shell 1, affecting the overall structure of the shell 1, and being not conducive to the formation of the second reinforcing rib 16; if the outer diameter of the second reinforcing rib 16 is greater than the diameter of the battery cell body 2 minus 2 mm, the distance between the second reinforcing rib 16 and the fillet of the bottom wall of the shell 1 is too close, which is not conducive to the formation of the second reinforcing rib 16. Therefore, the outer diameter of the second reinforcing rib 16 is less than the diameter of the battery cell body 2 minus 2 mm in the application, which ensures the structural strength of the inner bottom wall and the convenience of the formation of the second reinforcing rib 16.

[0068] In some embodiments, along the axial direction of the shell 1, the height of the second reinforcing rib 16 is less than 0.08 mm.

[0069] It can be understood that if the height of the second reinforcing rib 16 is greater than 0.08 mm, it will have a greater impact on the overall height of the battery cell. Therefore, the height of the second reinforcing rib 16 is less than 0.08 mm in the application, which ensures the structural strength of the inner bottom wall of the shell 1 and reduces the impact on the overall height of the battery cell.

[0070] In the full-tab battery cell, the battery cell body 2 includes a negative bus plate 3, and the negative bus plate 3 needs to be connected with the shell 1. If the height of the second reinforcing rib 16 is greater than 0.08 mm, the second reinforcing rib 16 will interfere with the installation and connection of the negative bus plate 3. Therefore, the height of the second reinforcing rib 16 is less than 0.08 mm in the application, which ensures the structural strength of the inner bottom wall of the shell 1 and avoids interference with the negative bus plate 3.

[0071] In some embodiments, as shown in Figure 5 and Figure 6 , the battery cell further includes a negative bus plate 3, and the negative bus plate 3 is formed with a boss 31, and the boss 31 is connected with the bottom wall of the shell 1, wherein along the axial direction of the shell 1, the height of the second reinforcing rib 16 is less than the height of the boss 31.

[0072] It can be understood that the height of the second reinforcing rib 16 is set to be less than the height of the boss 31 of the negative busbar 3, so that the second reinforcing rib 16 does not affect the connection of the boss 31 of the negative busbar 3 and the shell 1, avoiding interference of the second reinforcing rib 16 on the negative busbar 3.

[0073] For example, the height of the second reinforcing rib 16 is 0.08mm, and the height of the negative busbar 3 is 0.1mm.

[0074] In some embodiments, as Figure 5 and Figure 6 At least two second reinforcing ribs 16 are arranged around the boss 31, and the second reinforcing rib 16 is arranged in a spaced manner with the boss 31.

[0075] It can be understood that the second reinforcing rib 16 is arranged around the boss 31, that is, the boss 31 of the negative busbar 3 does not need to be connected with the shell 1 through the second reinforcing rib 16, and the boss 31 of the negative busbar 3 can be normally connected with the shell 1, thereby avoiding affecting the height of the battery cell.

[0076] It can be understood that if the second reinforcing rib 16 is arranged opposite to the boss 31, that is, the boss 31 is connected with the second reinforcing rib 16, the height of the battery cell will be increased.

[0077] According to the embodiment of the second aspect of the present application, the battery includes the above-mentioned battery cell.

[0078] According to the battery of the embodiment of the present application, the first reinforcing rib 13 is connected at the side wall 12 of the shell 1, which can effectively improve the structural strength of the side wall 12 of the shell 1, and can effectively prevent the side wall 12 of the shell 1 from bulging outward when the battery cell body 2 expands, thereby avoiding the increase of the diameter of the battery cell, ensuring the quality of the battery cell and the qualified rate of the battery cell. At the same time, the at least two first reinforcing ribs 13 are uniformly arranged along the circumference of the battery cell body 2, and the uniformity of the arrangement of the first reinforcing ribs 13 ensures the uniformity of the strengthening of the structural strength of the side wall 12 of the shell 1, which is beneficial to improving the overall strength of the side wall 12 of the shell 1, avoiding the situation that part of the side wall 12 has low strength, and improving the quality of the battery.

[0079] According to the embodiment of the third aspect of the present application, the electrical equipment includes the above-mentioned battery.

[0080] According to the power equipment provided by the embodiment of the present application, the first reinforcing ribs 13 are connected at the side wall 12 of the shell 1, which can effectively improve the structural strength of the side wall 12 of the shell 1, effectively prevent the side wall 12 of the shell 1 from bulging outward when the battery core body 2 expands, avoid the diameter of the battery core from increasing, ensure the quality of the battery core, and ensure the qualified rate of the battery core. Meanwhile, the at least two first reinforcing ribs 13 are evenly arranged along the circumference of the battery core body 2, the uniformity of the arrangement of the first reinforcing ribs 13 ensures the uniformity of the strengthening of the structural strength of the side wall 12 of the shell 1, which is beneficial to improve the overall strength of the side wall 12 of the shell 1, avoid the situation that some side walls 12 have low strength, and improve the stability of the power equipment.

[0081] It should be noted that the power equipment can be a vehicle, an aircraft, or a household appliance. It should be noted that the foregoing is only an example of the power equipment, and the power equipment is not specially limited.

[0082] The above describes the embodiments of the present application in detail, and the specific examples are applied to describe the principles and implementation modes of the present application. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation modes and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An electric cell, characterized by, The application relates to a battery and a battery cell. The battery cell comprises: a shell formed with a mounting cavity; an electric cell body mounted in the mounting cavity; 2. The electric cell of claim 1, wherein, wherein the shell comprises a side wall and at least two first reinforcing ribs connected to the side wall, and the at least two first reinforcing ribs are uniformly arranged along the circumference of the electric cell body.

3. The electric cell of claim 1, wherein, The first reinforcing ribs are formed on the inner side wall of the shell, and the first reinforcing ribs abut against the electric cell body.

4. The electric cell of claim 3, wherein, The shell comprises a main body part and a sealing part connected to each other, the first reinforcing ribs are formed on the side wall surface of the main body part, and the first reinforcing ribs are arranged adjacent to or spaced apart from the sealing part.

5. The electric cell of claim 3, wherein, Along the axial direction of the shell, the length of the first reinforcing ribs is equal to the length of the main body part.

6. The cell of any one of claims 1 to 4, wherein, Along the axial direction of the shell, the distance between the end of the end of the sealing part away from the main body part and the first reinforcing ribs is between 6 mm and 10 mm.

7. The cell of any one of claims 1 to 4, wherein, Along the axial direction of the shell, the length of the first reinforcing ribs is greater than or equal to the length of the electric cell body.

8. The cell of any one of claims 1 to 4, wherein, Along the radial direction of the shell, the thickness of the first reinforcing ribs is less than half of the thickness of the side wall.

9. The cell of any one of claims 1 to 4, wherein, Along the circumferential direction of the shell, the central angle corresponding to the first reinforcing ribs is between 5 degrees and 45 degrees.

10. A battery, characterized by Along the radial direction of the shell, the orthogonal projection of the first reinforcing ribs on the side wall is a first projection, the orthogonal projection of the electric cell body on the side wall is a second projection, one end of the first projection is flush with one end of the second projection, and the other end of the first projection protrudes from the other end of the second projection.

11. An electrical device, characterized by The battery comprises the battery cell as claimed in any one of claims 1 to 9. The battery comprises the battery cell as claimed in claim 10.

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