Battery

Abstract

The utility model provides a battery. The battery comprises a shell; the pole comprises a conductive piece and an outer fixing part used for positioning the conductive piece, the conductive piece penetrates through the shell in a sealed and insulated mode, the outer fixing part is connected to the end, located outside the shell, of the conductive piece, and a containing groove is formed in the outer fixing part; the sealing nail is located in the containing groove, and the circumferential side wall of the sealing nail is welded to the groove wall of the containing groove; the groove bottom of the containing groove is provided with a protruding rib, and the sealing nail is provided with an avoiding groove corresponding to the protruding rib. According to the battery provided by the invention, the convex rib is arranged at the groove bottom of the accommodating groove, and the thickness of the outer fixing part can be increased at least at the position of the convex rib, so that the overall bending deformation resistance of the outer fixing part is improved. When the sealing nail is welded with the external fixing part of the pole, at least the deformation of the external fixing part can be reduced, and the external fixing part can effectively press the insulating sealing element in the battery, so that the risk of sealing failure of the battery is reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery. Background Technology

[0002] Battery sealing has always been a major concern in the industry. For cylindrical batteries with larger diameters, this includes terminals connected to the ends of the casing. During the welding and assembly of these terminals, heat can cause structural deformation, potentially leading to sealing failure of the insulating seals that mate with the terminals. Utility Model Content

[0003] In view of this, the purpose of this application is to propose a battery that at least partially solves the problem of the risk of battery sealing failure due to thermal deformation of the terminal structure.

[0004] To achieve the above objectives, this application provides a battery comprising: a housing; an electrode post including a conductive element and an external fixing portion for positioning the conductive element, the conductive element being sealed and insulated through the housing, the external fixing portion being connected to the end of the conductive element located outside the housing, the external fixing portion being provided with a receiving groove; a sealing pin located within the receiving groove, the circumferential sidewall of the sealing pin being welded to the groove wall of the receiving groove; wherein, the bottom of the receiving groove is provided with a protruding rib, and the sealing pin is provided with a clearance groove corresponding to the rib.

[0005] Optionally, along the penetrating direction of the conductive element, the orthographic projection of the rib on the housing coincides with the orthographic projection of the conductive element on the housing.

[0006] Optionally, along the through direction of the conductive element, the projection of the rib on the housing is located inside the projection of the recess groove on the housing.

[0007] Optionally, along the through direction of the conductive component, the height of the raised rib is less than the depth of the recessed groove.

[0008] Optionally, an inner chamfer is provided between the portion of the sealing pin facing the bottom of the receiving groove and the circumferential sidewall, and the side length of the inner chamfer along the through direction of the conductive element is greater than the depth of the clearance groove.

[0009] Optionally, the portion of the external fixing part facing the housing is provided with an external chamfer between it and the conductive element.

[0010] Optionally, the external chamfer includes a fillet with a radius of 0.1 mm to 0.5 mm; or, the external chamfer includes a bevel with a side length of 0.1 mm to 0.5 mm.

[0011] Optionally, along the radial direction of the conductive element, the distance between the side wall of the rib near the center of the conductive element and the groove wall of the adjacent clearance groove is L4, and the distance between the circumferential side wall of the sealing pin and the groove wall of the receiving groove is L5, where L4 > L5.

[0012] Optionally, the width direction of the rib is perpendicular to the radial direction of the conductive element, and a chamfer is provided between the sidewall of the rib along the width direction and the top of the rib.

[0013] Optionally, multiple raised ribs are evenly arranged around the conductive element.

[0014] As can be seen from the above, the battery provided in this application, with protruding ribs at the bottom of the receiving groove, can increase the thickness of the outer fixing part at least at the location of the ribs, thereby improving the overall resistance of the outer fixing part to bending deformation. When welding the sealing pin to the outer fixing part of the terminal post, the deformation of the outer fixing part can be reduced, ensuring that the outer fixing part can effectively press the insulating seals in the battery, thus reducing the risk of battery seal failure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of a battery according to an embodiment of this application;

[0017] Figure 2 for Figure 1 A cross-sectional schematic diagram of the first type of structure at section AA;

[0018] Figure 3 for Figure 1 A cross-sectional schematic diagram of the second structure at section AA;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of part B in the middle;

[0020] Figure 5 This is a partial perspective view of a battery with a second structure according to an embodiment of this application;

[0021] Figure 6 This is a partial top view of a battery with a second structure according to an embodiment of this application;

[0022] Figure 7 This is a bottom-view perspective view of the sealing nail according to an embodiment of this application;

[0023] Figure 8 for Figure 3 An enlarged schematic diagram of the third structure in part B;

[0024] Figure 9 for Figure 3 Enlarged schematic diagram of the fourth structure in Part B;

[0025] Figure 10 for Figure 6 Partial cross-sectional view of the CC section;

[0026] Figure 11 This is a partial top view of a battery with a fifth structure according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Shell;

[0029] 200, pole post; 210, conductive component; 211, thinning zone; 220, external fixing part; 221, receiving groove; 2211, bottom of the receiving groove; 2212, wall of the receiving groove; 230, internal fixing part; 240, raised rib; 241, chamfer of the raised rib;

[0030] 300, Sealing nail; 310, Circumferential sidewall; 320, Recessed groove; 330, Inner chamfer;

[0031] 400, current collector; 500, insulating seal; 600, external chamfer; 700, bare battery cell. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0033] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0034] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0035] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0036] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Figure 1 A 3D schematic diagram of the battery is shown, such as... Figure 1 The battery includes a housing 100, which, for example, can be a cylindrical structure that is closed at one end and open at the other, with a terminal post 200 installed at the closed end of the housing 100.

[0038] Figure 2 Showing Figure 1 A cross-sectional schematic diagram of the first type of structure with section AA, as shown below. Figure 1 and Figure 2 The housing 100 contains a bare battery cell 700. The electrode post 200 includes a conductive element 210 and an external fixing part 220 for positioning the conductive element 210. The conductive element 210 is sealed and insulated through the housing 100. The external fixing part 220 is connected to the end of the conductive element 210 located outside the housing 100.

[0039] For example, the end of the conductive element 210 located inside the housing 100 is connected to an inner fixing part 230. The inner fixing part 230 and the outer fixing part 220 cooperate with each other to clamp the housing 100, thereby positioning the conductive element 210.

[0040] For example, insulating seals 500 (e.g., rubber sealing rings) may be provided between the conductive part 210 and the housing 100, between the outer fixing part 220 and the housing 100, and between the inner fixing part 230 and the housing 100 to achieve an insulating and sealed connection between the pole post 200 and the housing 100.

[0041] For example, the conductive element 210 can be a cylindrical structure, and both the outer fixing part 220 and the inner fixing part 230 are annular structures surrounding the cylindrical structure.

[0042] The housing 100 also contains a current collector 400 (or adapter plate) electrically connected to the tabs of the bare battery cell 700. The current collector 400 is located directly below the conductive element 210 and is electrically connected to the conductive element 210 using a laser penetration welding process. To ensure the welding quality between the current collector 400 and the conductive element 210, a thinner reduction zone 211 can be provided in the middle of the conductive element 210 to facilitate laser penetration.

[0043] After the pole post 200 is assembled, there is no need to connect a sealing pin 300 that can cover the thinned area 211 to the pole post 200. The outer fixing part 220 is provided with a receiving groove 221, and the sealing pin 300 is located in the receiving groove 221. The middle part of the sealing pin 300 covers the thinned area 211, and the position near the edge abuts against the bottom 2211 of the receiving groove. The circumferential sidewall 310 of the sealing pin 300 is welded to the groove wall 2212 of the receiving groove to achieve connection between the sealing pin 300 and the pole post 200.

[0044] For example, the transverse section of the receiving groove 221 (i.e., perpendicular to) Figure 2 The Z-direction cross-section of the sealing nail 300 is circular, and the transverse cross-section of the sealing nail 300 is circular to match the receiving groove 221.

[0045] When the sealing pin 300 is welded to the terminal post 200, the outer fixing part 220 in the terminal post 200 is prone to upward deformation. This will reduce the compressive force exerted by the outer fixing part 220 on the insulating seal 500, thereby reducing the sealing performance of the insulating seal 500 and posing a risk of sealing failure of the battery.

[0046] The applicant's research revealed that the reason the external fixing part 220 warps is because its thickness is relatively thin after the receiving groove 221 is provided, especially at the connection between the external fixing part 220 and the conductive component 210. When the sealing nail 300 is welded to the external fixing part 220, the thinner areas of the external fixing part 220 have poor resistance to bending deformation and are prone to welding deformation under stress, which in turn causes the external fixing part 220 to warp.

[0047] To avoid the above problems, Figure 3 Showing Figure 1 A cross-sectional schematic diagram of the second structure at section AA. Figure 5 A partial three-dimensional schematic diagram of the second type of battery structure is shown. (For example...) Figure 3 and Figure 5 In some embodiments, the bottom 2211 of the receiving groove is provided with a protruding rib 240, and the sealing nail 300 is provided with a clearance groove 320 corresponding to the rib 240.

[0048] For example, the end of the relief groove 320 away from the center of the sealing nail 300 passes through the sealing nail 300. On the one hand, this can prevent the rib 240 from interfering with the groove wall of the relief groove 320, and on the other hand, it can reduce the molding difficulty of the sealing nail 300.

[0049] For example, the rib 240 and the clearance groove 320 are set in a one-to-one correspondence to avoid interference between the rib 240 and the sealing nail 300.

[0050] Before welding the sealing nail 300 and the pole post 200, it is necessary to ensure that the relief groove 320 of the sealing nail 300 is aligned with the rib 240, that is, all the ribs 240 are located in their respective relief grooves 320, so as to ensure a reliable connection between the sealing nail 300 and the pole post 200.

[0051] In this embodiment, the battery has a protruding rib 240 at the bottom 2211 of the receiving groove. This increases the thickness of the outer fixing part 220 at least at the location of the rib 240, thereby improving the overall resistance of the outer fixing part 220 to bending deformation. When the sealing pin 300 is welded to the outer fixing part 220 of the terminal post 200, the deformation of the outer fixing part 220 can be reduced, ensuring that the outer fixing part 220 can effectively press the insulating seal 500 in the battery, thereby reducing the risk of battery seal failure.

[0052] Figure 4 Showing Figure 3 An enlarged diagram of part B, as shown below. Figure 4 In some embodiments, along the through direction of the conductive element 210 ( Figure 4 In the Z direction, the orthographic projection of the rib 240 on the housing 100 coincides with the orthographic projection of the conductive element 210 on the housing 100.

[0053] by Figure 4 The structure and orientation shown will be used as an example for further explanation. Figure 4 A portion of the protruding rib 240 is located on the left side of the sidewall of the conductive element 210 (hereinafter referred to as the left portion), and another portion is located on the right side of the sidewall of the conductive element 210 (hereinafter referred to as the right portion). Along the penetrating direction of the conductive element 210, the orthographic projection of the left portion of the protruding rib 240 onto the housing 100 coincides with the orthographic projection of the conductive element 210 onto the housing 100 (i.e., Figure 4 (If L3 > 0), the right side of the rib 240 does not coincide with the orthographic projection of the conductive element 210 on the housing 100.

[0054] In summary, the upward deformation of the external fixing part 220 is due to the thinness of the connection point between the external fixing part 220 and the conductive element 210 (hereinafter referred to as the root of the external fixing part 220), resulting in a larger deformation at that location. In this embodiment, the left side of the rib 240 can increase the thickness of the root of the external fixing part 220. Consequently, the strength and resistance to bending deformation of the root of the external fixing part 220 are effectively improved, effectively reducing the deformation of the external fixing part 220 during welding, thereby ensuring the sealing performance of the battery.

[0055] like Figure 4 In some embodiments, along the through direction of the conductive element 210, the projection of the rib 240 on the housing 100 (hereinafter referred to as the rib projection) is located inside the projection of the recess groove 320 on the housing 100 (hereinafter referred to as the groove projection).

[0056] Specifically, Figure 6 A partial top view of the second type of battery structure is shown, such as... Figure 6 The dimension of the rib 240 along the radial direction of the conductive element 210 is defined as the length L1 of the rib 240, and the dimension of the rib 240 perpendicular to the length direction is defined as the width W1 of the rib 240. Figure 7 A bottom-view perspective three-dimensional diagram of the sealing nail 300 is shown, such as... Figure 7 The dimension of the clearance groove 320 along the radial direction of the conductive component 210 is defined as the length L2 of the clearance groove 320, and the dimension of the clearance groove 320 perpendicular to the length direction is defined as the width W2 of the clearance groove 320; L1 < L2, W1 < W2.

[0057] In this embodiment, the projection of the rib is confined within the projection of the groove. When the rib 240 is aligned with the relief groove 320, it can be ensured that the side wall of the rib 240 will not interfere with the groove wall of the relief groove 320, and the sealing nail 300 can be stably installed in the receiving groove 221 and reliably connected with the pole post 200.

[0058] like Figure 4 In some embodiments, along the through direction of the conductive element 210, the height H1 of the rib 240 is less than the depth H2 of the recess groove 320.

[0059] By limiting the height H1 of the rib 240 and the depth H2 of the receiving groove 221 to H1 < H2, a gap is ensured between the top of the rib 240 and the bottom of the receiving groove 320 when the rib 240 is aligned with the groove 320, so that the entire rib 240 is located inside the corresponding receiving groove 320. At this time, the part of the bottom of the sealing nail 300 that is not provided with the receiving groove 320 can abut against the bottom 2211 of the receiving groove, thereby further ensuring that the sealing nail 300 can be stably installed in the receiving groove 221 and reliably connected to the pole post 200.

[0060] like Figure 4 and Figure 7 In some embodiments, an inner chamfer 330 is provided between the portion of the sealing pin 300 facing the bottom 2211 of the receiving groove and the circumferential sidewall 310, and the side length of the inner chamfer 330 along the through direction of the conductive member 210 (hereinafter referred to as the height of the inner chamfer 330) is greater than the depth H2 of the clearance groove 320.

[0061] For the sealing pin 300, the circumferential sidewall 310 is located between the inner chamfer 330 and the top of the sealing pin 300. The greater the height of the circumferential sidewall 310 (the dimension along the through direction of the conductive element 210), the better the welding quality between the sealing pin 300 and the outer fixing part 220. If the depth H2 of the relief groove 320 is greater than the height of the inner chamfer 330, then the relief groove 320 will extend along the through direction of the conductive element 210 to the circumferential sidewall 310. In this case, the height of the circumferential sidewall 310 at the location of the relief groove 320 will be reduced accordingly. When the sealing pin 300 and the outer fixing part 220 are welded, the location with the smaller height of the circumferential sidewall 310 may collapse when forming the molten pool, thus forming pores or blast points.

[0062] To avoid the above problems, in this embodiment, the depth H2 of the relief groove 320 is limited to less than the height of the inner chamfer 330, thereby preventing the welding area between the sealing pin 300 and the outer fixing part 220 from being reduced due to the setting of the relief groove 320, which helps to ensure the welding quality between the sealing pin 300 and the pole post 200.

[0063] Figure 8 Showing Figure 3 An enlarged schematic diagram of the third structure in section B. Figure 9 Showing Figure 3 An enlarged schematic diagram of the fourth structure in part B, as shown below. Figure 8 and Figure 9 In some embodiments, an outer chamfer 600 is provided between the portion of the outer fixing part 220 facing the housing 100 and the conductive member 210.

[0064] Based on the rib 240, this embodiment further increases the thickness of the root of the outer fixing part 220 by providing an outer chamfer 600 between the bottom of the outer fixing part 220 and the conductive member 210. The outer chamfer 600 provided around the perimeter of the outer fixing part 220 can further improve the overall resistance of the outer fixing part 220 to bending deformation. When the sealing pin 300 is welded to the outer fixing part 220 of the electrode post 200, the deformation of the outer fixing part 220 can be further reduced, thereby reducing the risk of battery sealing failure.

[0065] like Figure 8In some embodiments, the outer chamfer 600 includes a fillet with a radius of 0.1 mm to 0.5 mm.

[0066] For example, the radius of the fillet can be 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

[0067] If the radius of the fillet is too small, the increase in the thickness of the root of the outer fixing part 220 by setting the fillet will not be significant. If the radius of the fillet is too large, the fillet will encroach on the space between the outer fixing part 220 and the housing 100 for setting the insulating seal 500, which may adversely affect the sealing performance of the insulating seal 500.

[0068] To avoid the above problems, this embodiment limits the radius of the rounded corner to 0.1mm to 0.5mm, thereby significantly increasing the thickness of the root of the external fixing part 220 while avoiding adverse effects on the sealing performance of the insulating seal 500.

[0069] like Figure 9 In some embodiments, the outer chamfer 600 includes a chamfer with a side length of 0.1 mm to 0.5 mm.

[0070] For example, the side length of the chamfer can be 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

[0071] The beneficial effects achieved by limiting the side length of the chamfer in this embodiment to 0.1mm to 0.5mm are the same as those achieved by limiting the radius of the rounded corner to 0.1mm to 0.5mm in the above embodiment, and will not be repeated here.

[0072] like Figure 4 In some embodiments, along the radial direction of the conductive member 210, the distance between the side wall of the rib 240 near the center of the conductive member 210 and the groove wall of the adjacent clearance groove 320 is L4, and the distance between the circumferential side wall 310 of the sealing pin 300 and the groove wall 2212 of the receiving groove is L5, where L4 > L5.

[0073] In actual production, due to the unavoidable discrepancies between the dimensions and positions of the clearance groove 320 and the preset dimensions and positions, similarly, the dimensions and positions of the protruding rib 240 will also differ from the preset dimensions and positions. Figure 4 Taking the structure and orientation shown as an example, if L4≤L5, after the sealing nail 300 is placed into the receiving groove 221, due to the small size of L4, interference may occur between the left side wall of the protruding rib 240 and the left side wall of the relief groove 320, causing the sealing nail 300 to be unable to be placed stably in the receiving groove 221.

[0074] To avoid the above problems, this embodiment limits L4 and L5 to L4 > L5, which can prevent assembly interference between the sealing pin 300 and the pole post 200 and ensure that the sealing pin 300 and the pole post 200 can form a reliable connection.

[0075] Figure 10 Showing Figure 6 A partial cross-sectional diagram of the CC section is shown below. Figure 10 In some embodiments, a chamfer 241 is provided between the sidewall of the rib 240 along the width direction and the top of the rib 240.

[0076] For example, the chamfer 241 of the raised rib can be a rounded corner or a beveled corner.

[0077] After the sealing pin 300 is initially placed into the receiving groove 221, the clearance groove 320 may be misaligned with the rib 240. The sealing pin 300 needs to be rotated until the clearance groove 320 is aligned with the rib 240 so that the rib 240 can enter the clearance groove 320, thereby allowing the sealing pin 300 to be stably positioned in the receiving groove 221.

[0078] To reduce the difficulty of aligning the recessed groove 320 and the raised rib 240, this embodiment provides a raised rib chamfer 241 on the side wall in the width direction of the raised rib 240. When rotating the sealing nail 300, when the edge of the opening of the recessed groove 320 abuts against the raised rib chamfer 241, the raised rib chamfer 241 can guide the sealing nail 300, guiding the recessed groove 320 on the sealing nail 300 to a position aligned with the raised rib 240.

[0079] like Figure 6 In some embodiments, multiple ribs 240 are uniformly arranged around the conductive element 210.

[0080] by Figure 6 Taking the structure shown as an example, four ribs 240 are evenly distributed around the conductive element 210. When rotating the sealing pin 300 to align the recessed groove 320 with the ribs 240, the rotation angle does not need to exceed 90° to align all the ribs 240 with their corresponding recessed grooves 320. If only one rib 240 is provided, it may require a rotation of nearly 360° to align the rib 240 with the recessed groove 320. Therefore, it can be seen that evenly distributing multiple ribs 240 can reduce the difficulty of aligning the recessed groove 320 and the ribs 240, which helps to improve the assembly efficiency of the battery.

[0081] Meanwhile, the uniform arrangement of multiple ribs 240 can make the strength of the external fixing part 220 more uniform, which helps to prevent local deformation of the external fixing part 220 when welding the sealing nail 300 and the pole post 200.

[0082] The number of ribs 240 can be determined based on the structural dimensions such as the diameter of the external fixing part 220 or the assembly process requirements, and is not limited here.

[0083] For example, Figure 11 A partial top-view schematic diagram of the fifth battery structure is shown. (For example...) Figure 11 Eight ribs 240 can be provided and evenly distributed around the conductive element 210. When rotating the sealing pin 300 to align the relief groove 320 with the rib 240, the rotation angle does not exceed 45° to align all the ribs 240 with the corresponding relief grooves 320, which can further reduce the difficulty of aligning the relief grooves 320 and the ribs 240.

[0084] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0085] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0087] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0088] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0089] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized in that, include: case; The pole includes a conductive element and an external fixing part for positioning the conductive element. The conductive element is sealed and insulated through the housing. The external fixing part is connected to the end of the conductive element located outside the housing and is provided with a receiving groove. A sealing pin is located within the receiving groove, and the circumferential sidewall of the sealing pin is welded to the groove wall of the receiving groove; The bottom of the receiving groove is provided with a protruding rib, and the sealing nail is provided with a clearance groove corresponding to the rib.

2. The battery according to claim 1, characterized in that, Along the penetrating direction of the conductive element, the orthographic projection of the rib on the housing coincides with the orthographic projection of the conductive element on the housing.

3. The battery according to claim 1, characterized in that, Along the penetrating direction of the conductive element, the projection of the rib onto the housing is located inside the projection of the recess groove onto the housing.

4. The battery according to claim 1, characterized in that, Along the through-path of the conductive element, the height of the rib is less than the depth of the recessed groove.

5. The battery according to claim 1, characterized in that, The portion of the sealing pin facing the bottom of the receiving groove is provided with an inner chamfer between it and the circumferential sidewall. The side length of the inner chamfer along the penetrating direction of the conductive element is greater than the depth of the clearance groove.

6. The battery according to claim 1, characterized in that, An external chamfer is provided between the portion of the external fixing part facing the housing and the conductive element.

7. The battery according to claim 6, characterized in that, The outer chamfer includes a rounded corner, the radius of which is 0.1 mm to 0.5 mm; or, The outer chamfer includes a bevel angle, the side length of which is 0.1mm to 0.5mm.

8. The battery according to claim 1, characterized in that, Along the radial direction of the conductive element, the distance between the side wall of the rib near the center of the conductive element and the wall of the adjacent clearance groove is L4, and the distance between the circumferential side wall of the sealing pin and the wall of the receiving groove is L5, where L4 > L5.

9. The battery according to claim 1, characterized in that, The width direction of the rib is perpendicular to the radial direction of the conductive element, and a chamfer is provided between the sidewall of the rib along the width direction and the top of the rib.

10. The battery according to claim 1, characterized in that, The ribs are evenly arranged in multiple shapes around the conductive element.

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