Battery structure assembly and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery structure assembly which comprises a top cover assembly, a pole and a sealing ring, wherein a penetrating through hole is formed in the top cover assembly in a penetrating manner, the pole comprises a penetrating part and a connecting part, the penetrating part is arranged in the penetrating through hole in a penetrating manner, the connecting part is electrically connected with a battery cell in the battery, and an annular groove is formed in the end surface, connected with the penetrating part, of the connecting part. The sealing ring is arranged on the pole in a sleeving manner, the sealing ring comprises a first section, a second section and a third section which are sequentially connected in the axial direction of the sealing ring, the first section and the second section are located at the penetrating part, the second section extends in the radial direction of the sealing ring, the end face, facing the connecting part, of the second section is attached to the connecting part, and the third section is arranged in the annular groove. The utility model further provides a battery which comprises a box body and the battery structure assembly, and the top cover plate of the battery structure assembly is connected to the opening of the box body to form a shell of the battery. The battery can improve the encapsulation strength of the sealing ring and ensure the sealing performance of the sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to a battery structure assembly and a battery. Background Art

[0002] A sealing ring needs to be sleeved on the battery terminal post to ensure the sealing performance and insulation between the battery terminal post and the top cover plate. Manually sleeving the sealing ring is prone to being sleeved obliquely, resulting in poor sealing. In order to avoid the defects caused by manual operation, the prior art adopts a rubber coating process to directly form a sealing ring on the terminal post to ensure the sealing performance of the sealing ring. However, the bonding strength between the sealing ring and the terminal post is general, and the sealing ring is prone to being skewed relative to the terminal post when accidentally stressed, which still affects the sealing performance. Summary of the Utility Model

[0003] An object of the utility model is to provide a battery structure assembly, which can improve the bonding strength of the sealing ring, prevent it from moving relative to the terminal post when accidentally stressed, and ensure the sealing performance of the sealing ring.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] Provide a battery structure assembly, including:

[0006] A top cover assembly, which is provided with a through hole in a penetrating manner;

[0007] A terminal post, including a penetrating portion and a connecting portion, the penetrating portion penetrates through the through hole, the connecting portion is electrically connected to the battery cell inside the battery, and an annular groove is formed on the end surface of the connecting portion connecting the penetrating portion;

[0008] A sealing ring, the sealing ring is sleeved on the terminal post, the sealing ring includes a first section, a second section and a third section connected in sequence along its own axial direction, the first section and the second section are both located at the penetrating portion, the second section extends along its own radial direction, the end surface of the second section facing the connecting portion fits against the connecting portion, and the third section is arranged in the annular groove.

[0009] Optionally, a first protrusion is arranged on the inner circumferential side wall of the annular groove, and a first groove is correspondingly arranged on the inner circle of the third section, and the first protrusion is located in the first groove;

[0010] And / or, a second groove is arranged on the inner circumferential side wall of the annular groove, and a second protrusion is correspondingly arranged on the inner circle of the third section, and the second protrusion is located in the second groove.

[0011] Optionally, a third protrusion is arranged on the outer circumferential side wall of the annular groove, and a third groove is correspondingly arranged on the outer circle of the third section, and the third protrusion is located in the third groove;

[0012] And / or, a fourth groove is provided on the outer sidewall of the outer ring of the annular groove, and a fourth protrusion is correspondingly provided on the outer ring of the third section, and the fourth protrusion is located in the fourth groove.

[0013] Optionally, a fifth groove is provided on the bottom of the annular groove, and a fifth protrusion is correspondingly provided on the end surface of the third section contacting the bottom, and the fifth protrusion is located in the fifth groove;

[0014] And / or, a sixth protrusion is provided on the bottom of the annular groove, and a sixth groove is correspondingly provided on the end surface of the third section contacting the bottom, and the sixth protrusion is located in the sixth groove.

[0015] Optionally, the maximum value of the width of the cross-section of the annular groove is greater than the width value of the notch of the cross-section.

[0016] Optionally, the cross-section of the annular groove is polygonal or spherical.

[0017] Optionally, a seventh protrusion is provided on the inner sidewall of the first section, a seventh groove is correspondingly formed on the sidewall of the penetrating portion, and the seventh protrusion is located in the seventh groove;

[0018] And / or, an eighth groove is formed on the inner sidewall of the first section, an eighth protrusion is correspondingly provided on the sidewall of the penetrating portion, and the eighth protrusion is located in the eighth groove;

[0019] And / or, a ninth protrusion is provided on the inner sidewall of the second section, a ninth groove is correspondingly formed on the sidewall of the penetrating portion, and the ninth protrusion is located in the ninth groove;

[0020] And / or, a tenth groove is formed on the inner sidewall of the first section, a tenth protrusion is correspondingly provided on the sidewall of the penetrating portion, and the tenth protrusion is located in the tenth groove.

[0021] Optionally, a plurality of the annular grooves are formed on the end surface of the connecting portion connecting the penetrating portion, the plurality of annular grooves are concentrically arranged at intervals, the sealing ring includes a plurality of the third sections, the plurality of third sections are concentrically arranged at intervals, and the plurality of third sections are respectively arranged in the plurality of annular grooves.

[0022] Optionally, the top cover assembly includes a top cover plate and a lower plastic, the lower plastic is located on the surface of the top cover plate facing the battery cell, and the lower plastic is partially erected between the connecting portion and the top cover plate.

[0023] Another object of the present invention is to provide a battery, which can improve the encapsulation strength of the sealing ring, prevent accidental force from moving relative to the pole column, and ensure the sealing performance of the sealing ring.

[0024] To achieve this purpose, the present utility model adopts the following technical solutions:

[0025] A battery is provided, which includes a box body and the above-mentioned battery structure assembly. The top cover plate of the battery structure assembly is connected to the opening of the box body to form the housing of the battery.

[0026] The beneficial effects of the present utility model:

[0027] The present utility model provides a battery structure assembly, which includes a top cover assembly, a pole post and a sealing ring. Among them, the top cover assembly is provided with a through hole in a penetrating manner. The pole post includes a penetrating portion and a connecting portion. The penetrating portion penetrates through the through hole, and the connecting portion is electrically connected to the battery core inside the battery. An annular groove is provided on the end surface of the connecting portion connecting the penetrating portion. The sealing ring is sleeved on the pole post. The sealing ring includes a first section, a second section and a third section connected in sequence along its own axial direction. The first section and the second section are both located at the penetrating portion. The second section extends along its own radial direction. The end surface of the second section facing the connecting portion fits against the connecting portion. The third section is arranged in the annular groove. By providing the third section on the sealing ring and providing the annular groove on the connecting portion of the pole post, the contact area between the sealing ring and the connecting portion can be effectively increased, thereby improving the encapsulation strength of the sealing ring, preventing the sealing ring from accidentally moving relative to the pole post under force, and ensuring the sealing performance of the sealing ring.

[0028] The present utility model provides a battery, which includes a box body and the above-mentioned battery structure assembly. The top cover plate of the battery structure assembly is connected to the opening of the box body to form the housing of the battery. This battery can effectively increase the contact area between the sealing ring and the connecting portion, thereby improving the encapsulation strength of the sealing ring, preventing the sealing ring from accidentally moving relative to the pole post under force, and ensuring the sealing performance of the sealing ring. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the battery structure assembly provided by an embodiment of the present utility model;

[0030] Figure 2 is an exploded view of the battery structure assembly provided by an embodiment of the present utility model;

[0031] Figure 3 is a partial cross-sectional view of the battery structure assembly provided by an embodiment of the present utility model;

[0032] Figure 4 is a schematic structural diagram of the pole post provided by an embodiment of the present utility model.

[0033] In the figure:

[0034] 1. Top cover assembly; 11. Top cover plate; 12. Lower plastic; 13. Connecting block; 14. Upper plastic; 15. Explosion-proof valve;

[0035] 2. Terminal post; 21. Penetrating part; 22. Connecting part; 221. Annular groove;

[0036] 3. Sealing ring; 31. First section; 32. Second section; 33. Third section. Detailed implementation mode

[0037] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and implementation modes. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0040] Such as Figures 1 - 4As shown in the figure, the battery structure assembly of this embodiment includes a top cover assembly 1, a pole 2, and a sealing ring 3. Among them, the top cover assembly 1 is provided with a through hole. The pole 2 includes a penetrating portion 21 and a connecting portion 22. The penetrating portion 21 penetrates through the through hole, and the connecting portion 22 is electrically connected to the battery cell inside the battery. An annular groove 221 is formed on the end face of the connecting portion 22 connecting the penetrating portion 21. The sealing ring 3 is sleeved on the pole 2. The sealing ring 3 includes a first section 31, a second section 32, and a third section 33 that are sequentially connected along its own axial direction. Both the first section 31 and the second section 32 are located at the penetrating portion 21. The second section 32 extends radially along its own direction, and the end face of the second section 32 facing the connecting portion 22 is in close contact with the connecting portion 22. The third section 33 is arranged in the annular groove 221. By providing the third section 33 on the sealing ring 3 and forming the annular groove 221 on the connecting portion 22 of the pole 2, the contact area between the sealing ring 3 and the connecting portion 22 can be effectively increased, thereby improving the encapsulation strength of the sealing ring 3, preventing the sealing ring 3 from moving relative to the pole 2 due to accidental force, and ensuring the sealing performance of the sealing ring 3.

[0041] In order to further increase the contact area between the sealing ring 3 and the pole 2 and improve the encapsulation strength, optionally, a first protrusion (not shown in the figure) is provided on the inner sidewall of the annular groove 221, and a first groove (not shown in the figure) is correspondingly provided on the inner ring of the third section 33. The first protrusion is located in the first groove. The setting of the first protrusion and the first groove can also prevent the sealing ring 3 from moving along the axial direction of the pole 2, that is, prevent the sealing ring 3 from detaching from the pole 2, so that the second section 32 of the sealing ring 3 is closely attached to the connecting portion 22.

[0042] Similarly, optionally, a second groove (not shown in the figure) is provided on the inner sidewall of the annular groove 221, and a second protrusion (not shown in the figure) is correspondingly provided on the inner ring of the third section 33. The second protrusion is located in the second groove.

[0043] Similarly, optionally, a third protrusion (not shown in the figure) is provided on the outer sidewall of the annular groove 221, and a third groove (not shown in the figure) is correspondingly provided on the outer ring of the third section 33. The third protrusion is located in the third groove.

[0044] Similarly, optionally, a fourth groove (not shown in the figure) is provided on the outer sidewall of the annular groove 221, and a fourth protrusion (not shown in the figure) is correspondingly provided on the outer ring of the third section 33. The fourth protrusion is located in the fourth groove.

[0045] To further increase the contact area between the sealing ring 3 and the terminal post 2 and improve the encapsulation strength, optionally, a fifth groove (not shown in the figure) is provided on the bottom of the annular groove 221, and a fifth protrusion (not shown in the figure) is correspondingly provided on the end face of the third section 33 in contact with the bottom of the groove. The fifth protrusion is located within the fifth groove. Optionally, a sixth protrusion (not shown in the figure) is provided on the bottom of the annular groove 221, and a sixth groove (not shown in the figure) is correspondingly provided on the end face of the third section 33 in contact with the bottom of the groove. The sixth protrusion is located within the sixth groove.

[0046] Optionally, the maximum value of the width of the cross-section of the annular groove 221 is greater than the width value of the notch of the cross-section, so that the notch can have a tightening effect on the third section 33 of the sealing ring 3, preventing the third section 33 from disengaging from the annular groove 221, and further ensuring the sealing performance of the sealing ring 3.

[0047] Optionally, the cross-section of the annular groove 221 is polygonal or spherical. In this embodiment, the cross-section of the annular groove 221 is rectangular. In other embodiments, the cross-section of the annular groove 221 can also be an inverted triangle, rhombus, pentagon, other polygons or a superposition of multiple polygons, and can also be set as a complete sphere, hemisphere or partial sphere, etc., which will not be overly restricted here. However, it should be noted that since the sealing ring 3 is directly formed by the encapsulation process, the shape of the cross-section of its third section 33 depends on the shape of the cross-section of the annular groove 221.

[0048] To further increase the contact area between the sealing ring 3 and the terminal post 2 and improve the encapsulation strength, optionally, a seventh protrusion (not shown in the figure) is provided on the inner side wall surface of the first section 31, and a seventh groove (not shown in the figure) is correspondingly formed on the side wall of the penetrating portion 21. The seventh protrusion is located within the seventh groove. Optionally, an eighth groove (not shown in the figure) is formed on the inner side wall surface of the first section 31, and an eighth protrusion (not shown in the figure) is correspondingly provided on the side wall of the penetrating portion 21. The eighth protrusion is located within the eighth groove.

[0049] To further increase the contact area between the sealing ring 3 and the terminal post 2 and improve the encapsulation strength, optionally, a ninth protrusion (not shown in the figure) is provided on the inner side wall surface of the second section 32, and a ninth groove (not shown in the figure) is correspondingly formed on the side wall of the penetrating portion 21. The ninth protrusion is located within the ninth groove. Optionally, a tenth groove (not shown in the figure) is formed on the inner side wall surface of the first section 31, and a tenth protrusion (not shown in the figure) is correspondingly provided on the side wall of the penetrating portion 21. The tenth protrusion is located within the tenth groove.

[0050] Optionally, the above-mentioned protrusions and grooves can both be annular structures or multiple spaced block structures.

[0051] In order to further increase the contact area between the sealing ring 3 and the terminal post 2 and improve the encapsulation strength, optionally, a plurality of annular grooves 221 are provided on the end face of the connecting portion 22 where it penetrates through the penetrating portion 21. The plurality of annular grooves 221 are arranged concentrically and at intervals. The sealing ring 3 includes a plurality of third segments 33, and the plurality of third segments 33 are arranged concentrically and at intervals. The plurality of third segments 33 are respectively arranged in the plurality of annular grooves 221. The number of the annular grooves 221 and the third segments 33 can be set according to the actual sizes of the terminal post 2 and the sealing ring 3.

[0052] Optionally, the top cover assembly 1 includes a top cover plate 11 and a lower plastic 12. The lower plastic 12 is located on the surface of the top cover plate 11 facing the battery cell, and the lower plastic 12 is partially supported between the connecting portion 22 and the top cover plate 11. Optionally, the top cover assembly 1 further includes a connecting block 13 and an upper plastic 14. The connecting block 13 is connected to the end of the penetrating portion 21, and the upper plastic 14 is located between the top cover plate 11 and the connecting block 13 to ensure insulation therebetween. Optionally, the top cover assembly 1 further includes an explosion-proof valve 15, and the explosion-proof valve 15 is provided on the top cover plate 11. Optionally, the top cover plate 11 is provided with a liquid injection hole for injecting electrolyte.

[0053] This embodiment also provides a battery, which includes a box body and the above-mentioned battery structure assembly. The top cover plate 11 of the battery structure assembly is connected to the opening of the box body to form the housing of the battery. This battery can effectively increase the contact area between the sealing ring 3 and the connecting portion 22, thereby improving the encapsulation strength of the sealing ring 3, preventing the sealing ring 3 from moving relative to the terminal post 2 due to accidental force, and ensuring the sealing performance of the sealing ring 3.

[0054] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery structure assembly, characterized in that: include: The top cover assembly (1) is provided with a through hole; The pole (2) comprises a penetration portion (21) and a connection portion (22), wherein the penetration portion (21) is penetrated in the penetration through hole, the connection portion (22) is electrically connected to a battery cell in a battery, and an annular groove (221) is formed on the end surface of the connection portion (22) connected to the penetration portion (21); A sealing ring (3), the sealing ring (3) being sleeved on the pole (2), the sealing ring (3) comprising a first section (31), a second section (32) and a third section (33) which are sequentially connected along its own axial direction, the first section (31) and the second section (32) being both located at the penetration portion (21), the second section (32) extending along its own radial direction, the second section (32) being in contact with the connection portion (22) with its end face facing the connection portion (22), and the third section (33) being arranged in the annular groove (221).

2. The battery structure assembly according to claim 1, characterized in that: A first protrusion is provided on the inner ring side wall of the annular groove (221), and a first groove is correspondingly provided on the inner ring of the third section (33), and the first protrusion is located in the first groove; And / or, a second groove is provided on the inner ring side wall of the annular groove (221), and a second protrusion is correspondingly provided on the inner ring of the third section (33), and the second protrusion is located in the second groove.

3. The battery structure assembly according to claim 1, characterized in that: A third protrusion is provided on the outer ring side wall of the annular groove (221), and a third groove is correspondingly provided on the outer ring of the third section (33), and the third protrusion is located in the third groove; And / or, a fourth groove is provided on the outer ring side wall of the annular groove (221), and a fourth protrusion is correspondingly provided on the outer ring of the third section (33), and the fourth protrusion is located in the fourth groove.

4. The battery structure assembly according to claim 1, characterized in that: A fifth groove is provided on the groove bottom of the annular groove (221), and a fifth protrusion is correspondingly provided on the end surface of the third section (33) contacting the groove bottom, and the fifth protrusion is located in the fifth groove; And / or, a sixth protrusion is provided on the groove bottom of the annular groove (221), a sixth groove is correspondingly provided on the end surface of the third section (33) contacting the groove bottom, and the sixth protrusion is located in the sixth groove.

5. The battery structure assembly according to any one of claims 1 to 4, characterized in that: The maximum value of the width of the cross section of the annular groove (221) is greater than the width of the notch of the cross section.

6. The battery structure assembly according to claim 5, characterized in that: The cross section of the annular groove (221) is polygonal or spherical.

7. The battery structure assembly according to any one of claims 1 to 4, characterized in that: The inner wall surface of the first section (31) is provided with a seventh protrusion, and the side wall of the penetration portion (21) is correspondingly provided with a seventh groove, and the seventh protrusion is located in the seventh groove; And / or, an eighth groove is formed on the inner side wall of the first section (31), and an eighth protrusion is correspondingly formed on the side wall of the penetration portion (21), and the eighth protrusion is located in the eighth groove; And / or, the inner side wall surface of the second section (32) is provided with a ninth protrusion, the side wall of the penetration portion (21) is correspondingly provided with a ninth groove, and the ninth protrusion is located in the ninth groove; And / or, the inner side wall of the first section (31) is provided with a tenth groove, and the side wall of the penetration portion (21) is correspondingly provided with a tenth protrusion, and the tenth protrusion is located in the tenth groove.

8. The battery structure assembly according to any one of claims 1 to 4, characterized in that: A plurality of annular grooves (221) are provided on the end surface of the connecting portion (22) connected to the penetration portion (21); the plurality of annular grooves (221) are arranged concentrically and spaced apart; the sealing ring (3) comprises a plurality of third sections (33); the plurality of third sections (33) are arranged concentrically and spaced apart; and the plurality of third sections (33) are respectively arranged in the plurality of annular grooves (221).

9. The battery structure assembly according to any one of claims 1 to 4, characterized in that: The top cover assembly (1) comprises a top cover plate (11) and a lower plastic (12); the lower plastic (12) is located on the surface of the top cover plate (11) facing the battery cell; and the lower plastic (12) is partially mounted between the connecting portion (22) and the top cover plate (11).

10. A battery, characterized in that It comprises a box body and a battery structure assembly as claimed in any one of claims 1 to 9, wherein a top cover plate (11) of the battery structure assembly is connected to an opening of the box body to form a shell of the battery.

Images