Battery cover plate structure and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a battery cover plate structure and a battery, and the battery cover plate structure comprises a sealing element and a cover plate. The sealing element comprises a sinking part and an annular part, the annular part is arranged around the sinking part, the sinking part protrudes towards the interior of the battery, a receding groove is formed in the side, facing the interior of the battery, of the annular part, and the side wall of one side of the receding groove and the outer wall of the sinking part are located on the same plane. A liquid injection hole is formed in the cover plate, the sinking part is inserted in the liquid injection hole, the annular part is located on the side, facing the exterior of the battery, of the cover plate, and the avoiding groove corresponds to the edge of the liquid injection hole. The battery comprises the battery cover plate structure. The battery comprises a shell and the battery cover plate structure, and the battery cover plate structure is arranged at the opening of the shell, so that the battery cover plate structure and the shell jointly form a shell of the battery. The battery can ensure that the sealing element and the cover plate are assembled in place, the welding yield of the sealing element and the cover plate is improved, and the welding sealing performance is ensured, so that the quality of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially, relates to a battery cover plate structure and battery. BACKGROUND

[0002] The cover plate of the battery is generally provided with a liquid injection hole to facilitate injection of electrolyte into the battery. A sealing member is arranged at the liquid injection hole to ensure the sealing of the battery. The production process of the components causes the bending part of the sealing member to have an R angle, and the opening edge of the liquid injection hole also has an R angle. When the bending part of the sealing member contacts the opening edge of the liquid injection hole, interference occurs, which prevents the sealing member and the cover plate from being normally assembled in place, affects the yield of subsequent welding of the sealing member and the cover plate, and affects the quality of the battery. SUMMARY

[0003] One object of the utility model is to provide a battery cover plate structure that can ensure the assembly of the sealing member and the cover plate in place, improve the welding yield of the sealing member and the cover plate, ensure the welding sealing, and thus ensure the quality of the battery.

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

[0005] The utility model provides a battery cover plate structure, which comprises:

[0006] A sealing member, which comprises a sunken part and an annular part, wherein the annular part is arranged around the sunken part, the sunken part is arranged protruding towards the inside of the battery, and a recess is arranged on one side of the annular part towards the inside of the battery.

[0007] A cover plate, which is provided with a liquid injection hole, wherein the sunken part is inserted at the liquid injection hole, the annular part is located on one side of the cover plate towards the outside of the battery, and the recess corresponds to the edge of the liquid injection hole.

[0008] Optionally, an accommodating groove is arranged on the end face of the cover plate towards the outside of the battery, the accommodating groove is arranged around the liquid injection hole, and the annular part is located at the accommodating groove.

[0009] Optionally, a thinning groove is circumferentially arranged at the edge of the end face of the annular part towards the outside of the battery.

[0010] Optionally, the depth h1 of the thinning groove is less than or equal to 0.1 mm.

[0011] Optionally, the vertical distance w1 between the inner circumferential side wall of the thinning groove and the side edge of the annular part is less than or equal to 0.5 mm.

[0012] Optionally, the top end of the outer side wall face of the accommodating groove is chamfered.

[0013] Optionally, the side between the inclined surface of the chamfer and the side wall of the accommodating groove is flush with the end surface of the edge of the annular portion towards the outside of the battery.

[0014] Optionally, the depth h2 of the avoiding groove satisfies 0.05mm≤h2≤0.1mm.

[0015] Optionally, the width w2 of the groove bottom of the avoiding groove satisfies 0.3mm≤w2≤1mm.

[0016] Another purpose of the utility model lies in: providing a battery which can guarantee that the sealing member and the cover plate are assembled in place, improve the welding yield of the sealing member and the cover plate, guarantee the welding sealing property, and thus guarantee the battery quality.

[0017] To achieve the purpose, the utility model adopts the following technical scheme:

[0018] The utility model provides a battery, including shell and above -mentioned battery cover plate structure, battery cover plate structure sets up at the opening of shell, to make battery cover plate structure and shell jointly form the shell of battery.

[0019] The utility model has the advantages of:

[0020] The utility model provides a battery cover plate structure, including sealing member and cover plate, wherein the sealing member includes a sunken part and an annular part, the annular part is arranged around the sunken part, the sunken part is arranged protruding towards the inside of the battery, a avoiding groove is formed on one side of the annular part towards the inside of the battery, and the side wall of the avoiding groove on one side is on the same plane with the outer wall of the sunken part. A liquid injection hole is formed on the cover plate, the sunken part is inserted into the liquid injection hole, the annular part is located on the side of the cover plate towards the outside of the battery, and the edge of the avoiding groove corresponds to the liquid injection hole. By arranging the avoiding groove, the bending part of the sunken part and the annular part no longer interferes with the edge of the liquid injection hole, so that the sealing member and the cover plate can be assembled in place, the welding yield of the sealing member and the cover plate is improved, the welding sealing property is guaranteed, and the battery quality is guaranteed.

[0021] The utility model also provides a battery, including shell and above -mentioned battery cover plate structure, battery cover plate structure sets up at the opening of shell, to make battery cover plate structure and shell jointly form the shell of battery. The battery can guarantee that the sealing member and the cover plate are assembled in place, improve the welding yield of the sealing member and the cover plate, guarantee the welding sealing property, and thus guarantee the battery quality. DRAWINGS

[0022] Figure 1 It is the first perspective of the partial structure of the battery cover plate structure provided by the utility model embodiment;

[0023] Figure 2 is an exploded view of a second perspective view of part of the battery cover plate structure provided by the embodiment of the present application;

[0024] Figure 3 is a sectional view of part of the battery cover plate structure provided by the embodiment of the present application;

[0025] Figure 4 is Figure 3 is an enlarged view of A in FIG.

[0026] Figure 5 is Figure 3 is an enlarged view of B in FIG.

[0027] in the figure:

[0028] 1, sealing element; 11, sunken part; 12, annular part; 121, avoiding groove; 122, thinning groove; 2, cover plate; 21, liquid injection hole; 22, accommodating groove; 23, inclined surface. DETAILED DESCRIPTION

[0029] The technical scheme of the present application will be further described below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only part of the present application is shown in the drawings.

[0030] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] As Figures 1-5As shown, the battery cover plate structure of the embodiment includes a sealing member 1 and a cover plate 2. The sealing member 1 includes a sunken portion 11 and an annular portion 12, the annular portion 12 is arranged around the sunken portion 11, the sunken portion 11 is arranged protruding towards the inside of the battery, and the annular portion 12 is provided with a relief groove 121 on one side thereof facing the inside of the battery, and the side wall of the relief groove 121 is on the same plane as the outer wall of the sunken portion 11. The cover plate 2 is provided with a liquid injection hole 21, the sunken portion 11 is inserted at the liquid injection hole 21, the annular portion 12 is located on the side of the cover plate 2 facing the outside of the battery, and the relief groove 121 corresponds to the edge of the liquid injection hole 21. By arranging the relief groove 121, the bending part of the sunken portion 11 and the annular portion 12 no longer interferes with the edge of the liquid injection hole 21, so that the sealing member 1 and the cover plate 2 can be assembled in place, the welding yield of the sealing member 1 and the cover plate 2 is improved, the welding sealing property is ensured, and the battery quality is ensured.

[0033] Optionally, the end face of the cover plate 2 facing the outside of the battery is provided with a receiving groove 22, the receiving groove 22 is arranged around the liquid injection hole 21, and the annular portion 12 is located at the receiving groove 22. On the one hand, the receiving groove 22 can accommodate the annular portion 12, preventing the annular portion 12 from protruding and loosening under stress, and on the other hand, the side wall of the receiving groove 22 is in abutment with the outer side of the annular portion 12, welding can be performed there, and the sealing property between the sealing member 1 and the cover plate 2 is ensured.

[0034] Optionally, the annular portion 12 is provided with a thinning groove 122 at the edge of the end face thereof facing the outside of the battery, the thinning groove 122 can provide a relief space for the welding process, facilitate welding operation, reduce welding difficulty, and reduce the possibility of false welding or welding through.

[0035] Optionally, the depth h1 of the thinning groove 122 is less than or equal to 0.1 mm, so as to prevent the edge of the sealing member 1 from being too thin and affecting the structural strength of the edge of the sealing member 1.

[0036] Optionally, the vertical distance w1 between the inner circle side wall of the thinning groove 122 and the side edge of the annular portion 12 is less than or equal to 0.5 mm, so as to prevent the thinning groove 122 from being too wide and affecting the structural strength of the sealing member 1 while meeting the welding needs.

[0037] Optionally, the top end of the outer side wall face of the receiving groove 22 is chamfered, which can also provide a relief space for the welding process, facilitate welding operation, reduce welding difficulty, and reduce the possibility of false welding or welding through.

[0038] Optionally, the side edge between the inclined face 23 of the chamfer and the side wall of the receiving groove 22 is flush with the end face of the edge of the annular portion 12 facing the outside of the battery.

[0039] Optionally, the annular portion 12 is flush with the end surface of the cover plate 2 around the liquid injection hole 21 towards the outside of the battery, which can improve the appearance and prevent the annular portion 12 from protruding from the cover plate 2 and being easily loosened by force.

[0040] Optionally, the depth h2 of the avoidance groove 121 satisfies 0.05mm≤h2≤0.1mm. The depth h2 of the avoidance groove 121 is h2 in the formula. Figure 5 If the depth h2 of the avoidance groove 121 is too deep, the structural strength of the bent portion of the sealing member 1 will be affected, and the service life of the sealing member 1 will be reduced. If the depth h2 of the avoidance groove 121 is too thin, it is not easy to process, and the error is too large, which may not completely eliminate the interference between the avoidance groove 121 and the cover plate 2.

[0041] Optionally, the width w2 of the bottom of the avoidance groove 121 satisfies 0.3mm≤w2≤1mm. The width w2 of the bottom of the avoidance groove 121 is w2 in the formula. Figure 5 If the width w2 of the bottom of the avoidance groove 121 is too wide, the structural strength of the sealing member 1 will also be affected, and the service life of the sealing member 1 will be reduced. If the width w2 of the bottom of the avoidance groove 121 is too narrow, it is not easy to process.

[0042] The battery cover plate structure can be used as a cylindrical battery cover plate or a rectangular battery cover plate, which is not limited herein. In addition, the shape of the sunken portion 11 is adapted to the shape of the liquid injection hole 21, which can be circular, oval, polygonal, or irregular, and correspondingly, the avoidance groove 121 can be a circular ring, an oval ring, a polygonal ring, or an irregular ring. The outer circle shape of the annular portion 12 is adapted to the shape of the accommodation groove 22, which can be circular, oval, polygonal, or irregular, and correspondingly, the thinning groove 122 can be a circular ring, an oval ring, a polygonal ring, or an irregular ring. Optionally, in the embodiment, the sunken portion 11 and the outer circle of the annular portion 12 are circular, and the avoidance groove 121 and the thinning groove 122 are circular grooves with uniform width everywhere. The difference is that the avoidance groove 121 has two side walls, and the thinning groove 122 only has an inner side wall and an outer side wall.

[0043] The embodiment also provides a battery including a shell and the battery cover plate structure described above, and the battery cover plate structure is arranged at an opening of the shell to form a shell of the battery together with the shell. The battery can ensure that the sealing member 1 and the cover plate 2 are assembled in place, improve the welding yield of the sealing member 1 and the cover plate 2, ensure the welding sealing performance, and thus ensure the quality of the battery.

[0044] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A battery cover plate structure, characterized by, The utility model relates to a battery sealing structure, including: A sealing piece (1) includes a sunken part (11) and an annular part (12), the annular part (12) is arranged around the sunken part (11), the sunken part (11) is arranged protruding towards the inside of the battery, the annular part (12) is opened with a recess (121) towards the side of the inside of the battery, the side wall of the recess (121) and the outer wall of the sunken part (11) are on a plane; A cover plate (2) is opened with a liquid injection hole (21), the sunken part (11) is inserted at the liquid injection hole (21), the annular part (12) is located at the side of the cover plate (2) towards the outside of the battery, and the recess (121) corresponds to the edge of the liquid injection hole (21).

2. The battery cover plate structure according to claim 1, characterized by, The end face of the cover plate (2) towards the outside of the battery is opened with a containing groove (22), the containing groove (22) is arranged around the liquid injection hole (21), and the annular part (12) is located at the containing groove (22).

3. The battery cover plate structure of claim 2, wherein, The annular part (12) is circumferentially opened with a thinning groove (122) at the edge of the end face towards the outside of the battery.

4. The battery cover plate structure according to claim 3, characterized by, The depth h1 of the thinning groove (122) is less than or equal to 0.1mm.

5. The battery cover plate structure of claim 3, wherein, The vertical distance w1 between the inner ring side wall of the thinning groove (122) and the side edge of the annular part (12) is less than or equal to 0.5mm.

6. The battery cover plate structure of claim 2, wherein, The top end of the outer side wall face of the containing groove (22) is chamfered.

7. The battery cover plate structure of claim 6, wherein, The side edge between the inclined face (23) of the chamfer and the side wall of the containing groove (22) is flush with the edge of the annular part (12) towards the end face of the outside of the battery.

8. The battery cover plate structure according to any one of claims 1 to 7, characterized by, The depth h2 of the recess (121) satisfies 0.05mm≤h2≤0.1mm.

9. The battery cover plate structure according to any one of claims 1 to 7, wherein The width w2 of the groove bottom of the recess (121) satisfies 0.3mm≤w2≤1mm.

10. A battery characterized by The utility model relates to a battery sealing structure, including: A cover plate structure of battery is arranged at the opening of the shell, so that the cover plate structure of battery and the shell jointly form the shell of the battery.

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