Battery top cover and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a single battery. The battery top cover comprises a cover plate sheet and a sealing ring. The cover plate piece is provided with a pole hole and an annular groove, and the annular groove is formed in the upper surface of the cover plate piece and surrounds the pole hole. The sealing ring is limited in the annular groove, and in the first direction, the thickness of the sealing ring is larger than the depth of the annular groove. And when the pole penetrates through the pole hole, the sealing ring can be extruded, so that the circumferential sealing of the pole is ensured. By arranging the annular groove, the sealing ring can be positioned when the battery cover plate is assembled, the sealing ring is prevented from falling off and inclining when the pole is connected with the cover plate sheet, the stability of the circumferential sealing structure of the pole is improved, and the normal compression amount of the sealing ring is ensured, so that the good air tightness of the battery top cover is ensured; the yield of the battery top cover is effectively improved, the sealing ring is conveniently and manually mounted, and the working efficiency is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery top cover and single cell. BACKGROUND

[0002] With the development of modern society and the enhancement of people's environmental protection consciousness, more and more equipment selects battery as power source, such as mobile phone, notebook computer, electric tool and electric automobile etc., which provides broad space for the application and development of battery, and the use performance and safety requirement of battery is increasingly high. The battery top cover is the key component of battery, which is directly related to the reliability, service life and capacity size of battery, and influences the production and use safety of producers and consumers.

[0003] In the existing battery top cover, the sealing ring is used for sealing between the pole and the cover plate piece, and the sealing structure not only affects the overall performance of the battery discharge capacity, but also plays a decisive role in the safety performance of the battery leakage and explosion prevention. In the existing sealing structure of the battery top cover, the top cover piece is connected with the lower plastic to become an integral whole, the sealing ring is sleeved on the lower plastic boss, and the pole is pressed against the sealing ring to perform pole welding. In this sealing structure, the sealing ring is prone to falling and skewing, which leads to the missing of the sealing ring or the reduction of the compression amount of the sealing ring, thereby affecting the sealing property of the battery.

[0004] Therefore, a battery top cover and single cell are needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] One purpose of the utility model is to provide a battery top cover, which can avoid the falling or skewing of the sealing ring and ensure the stable and safe sealing structure of the battery top cover.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A battery top cover is provided, which comprises:

[0008] A cover plate piece is provided with a pole hole and an annular groove, the annular groove is arranged on the upper surface of the cover plate piece, and the annular groove surrounds the pole hole;

[0009] A sealing ring is limited in the annular groove, and in the first direction, the thickness of the sealing ring is greater than the depth of the annular groove.

[0010] As an optional scheme of the battery top cover, the battery top cover further comprises a pole, the pole is arranged in the pole hole, and in the first direction, the pole abuts against the sealing ring.

[0011] As an optional solution of the battery top cover, the pole post comprises an upper pole post, a lower pole post and a through part, the upper pole post is located above the cover plate sheet in the first direction, the lower pole post is located below the cover plate sheet in the first direction, and the through part is connected between the upper pole post and the lower pole post and passes through the pole post hole.

[0012] As an optional solution of the battery top cover, the battery top cover further comprises a first insulating piece, the first insulating piece is located above the cover plate sheet, and the sealing ring is compressed between the first insulating piece and the cover plate sheet.

[0013] As an optional solution of the battery top cover, the cover plate sheet is further provided with a first limiting groove, the first limiting groove is arranged on the upper surface of the cover plate sheet, and the first insulating piece is limited in the first limiting groove.

[0014] As an optional solution of the battery top cover, the cover plate sheet further comprises a containing groove, the containing groove is located at the bottom surface of the first limiting groove, and the annular groove is arranged at the bottom surface of the containing groove.

[0015] As an optional solution of the battery top cover, the battery top cover further comprises a second insulating piece, and the second insulating piece abuts against the lower surface of the cover plate sheet.

[0016] As an optional solution of the battery top cover, the battery top cover further comprises an explosion-proof valve, the cover plate sheet is further provided with an explosion-proof hole, and the explosion-proof valve is connected to the cover plate sheet and covers the explosion-proof hole.

[0017] As an optional solution of the battery top cover, the cover plate sheet is further provided with a liquid injection hole.

[0018] Another purpose of the utility model is to provide a single battery, the battery top cover of which has a good sealing structure, and the safety performance of the single battery is ensured.

[0019] To achieve the purpose, the utility model adopts the following technical scheme.

[0020] The utility model provides a single battery, which comprises a shell, a battery cell and the above battery top cover, the battery cell is fixed in the shell, and the battery top cover and the shell are closedly connected.

[0021] The utility model has the advantages of:

[0022] The utility model provides a kind of battery top cover, annular groove is set on cover sheet, annular groove surrounds in pole hole, sealing ring can be limited in annular groove, it is favorable to realize the positioning of sealing ring when assembling battery cover plate, avoid the falling and skew of sealing ring when pole and cover sheet connect, improve the stability of sealing structure, ensure that sealing ring has normal compression amount, to ensure that battery top cover has good air tightness, effectively improve the yield of battery top cover, and it is convenient for artificial installation sealing ring, it is favorable to improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the partial sectional view of the battery top cover provided by the utility model;

[0024] Figure 2 It is the partial explosion drawing of the battery top cover provided by the utility model.

[0025] In the drawing:

[0026] 100, cover sheet;110, pole hole;120, annular groove;130, first limit slot;140, accommodating groove;150, explosion-proof hole;160, liquid injection hole;

[0027] 200, sealing ring;

[0028] 300, pole;310, upper pole;320, lower pole;330, pass through part;

[0029] 400, first insulating part;

[0030] 500, second insulating part;

[0031] 600, explosion-proof valve. DETAILED DESCRIPTION

[0032] The utility model makes further detailed description in combination with drawing and embodiment. It can be understood that the specific embodiment described here is only used to explain the utility model, and is not limited to the utility model. In addition, it needs to be explained that, for the convenience of description, only part related to the utility model is shown in the drawing, not all structures.

[0033] In the description of the utility model, unless another explicit provision and limitation, term "link", "connect", "fix" should be broad sense understanding, for example, can be fixed connection, or detachable connection, or integral;Can be mechanical connection, or electrical connection;Can be directly connected, or indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature.First feature "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0035] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position shown in the drawings, which are for convenience and simplification of description and operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] As shown in Figure 1 and Figure 2 The battery top cover of the embodiment includes a cover plate 100 and a sealing ring 200. The cover plate 100 is provided with a pole hole 110 and an annular groove 120. The annular groove 120 is arranged on the upper surface of the cover plate 100 and surrounds the pole hole 110. The initial width of the sealing ring 200 is less than the width of the annular groove 120, and the sealing ring 200 can be limited in the annular groove 120. In a first direction, the thickness of the sealing ring 200 is greater than the depth of the annular groove 120, wherein the first direction is Figure 1 the X direction in the figure, so that when the pole 300 abuts against the cover plate 100 during assembly of the battery top cover, the sealing ring 200 can be extruded and deformed.

[0037] Based on the above design, the battery top cover is provided with an annular groove 120 on the cover plate 100, the annular groove 120 surrounds the pole hole 110, the sealing ring 200 can be limited in the annular groove 120, and the sealing ring 200 can be extruded when the pole 300 is arranged in the pole hole 110, thereby ensuring the circumferential sealing of the pole 300. By arranging the annular groove 120, the positioning of the sealing ring 200 during assembly of the battery cover plate is facilitated, the falling and skewing of the sealing ring 200 during connection of the pole 300 and the cover plate 100 are avoided, the stability of the circumferential sealing structure of the pole 300 is improved, the sealing ring 200 has a normal compression amount, thereby ensuring that the battery top cover has good air tightness, effectively improving the yield of the battery top cover, facilitating manual installation of the sealing ring, and improving work efficiency.

[0038] Further, the battery top cover further comprises a pole 300, the pole 300 is arranged in the pole hole 110, and one end of the pole 300 abuts against the cover plate 100 in the first direction, and the other end of the pole 300 abuts against the sealing ring 200, so as to ensure the structural stability and good sealing between the cover plate 100, the sealing ring 200 and the pole 300.

[0039] Specifically, the pole 300 comprises an upper pole 310, a lower pole 320 and a penetrating portion 330, the upper pole 310 is located above the cover plate 100 in the first direction, and the upper pole 310 abuts against the top surface of the cover plate 100, the lower pole 320 is located below the cover plate 100 in the first direction, and the lower pole 320 abuts against the bottom surface of the cover plate 100, and the penetrating portion 330 is connected between the upper pole 310 and the lower pole 320 and arranged in the pole hole 110, so as to realize the connection between the pole 300 and the cover plate 100.

[0040] Further, the battery top cover further comprises a first insulating member 400, the first insulating member 400 is located above the cover plate 100, and the sealing ring 200 is compressed between the first insulating member 400 and the cover plate 100. Specifically, the first insulating member 400 covers the bottom surface and the periphery of the upper pole 310, so as to realize the insulation between the upper pole 310 and the cover plate 100.

[0041] Optionally, the cover plate 100 is further provided with a first limiting groove 130, the first limiting groove 130 is arranged on the upper surface of the cover plate 100, and the first insulating member 400 is limited in the first limiting groove 130, so as to facilitate the positioning of the first insulating member 400 and the upper pole 310, avoid the movement of the first insulating member 400 on the cover plate 100, facilitate the manual assembly, and be beneficial to improving the work efficiency.

[0042] As a preferred, the cover plate 100 further comprises a containing groove 140, the containing groove 140 is located at the bottom surface of the first limiting groove 130, and the annular groove 120 is arranged at the bottom surface of the containing groove 140. When the sealing ring 200 is compressed between the first insulating member 400 and the cover plate 100, the sealing ring 200 is deformed, and part of the sealing ring 200 may overflow from the annular groove 120, the overflowing part of the sealing ring 200 can be contained by the containing groove 140, so as to prevent the excessive extrusion of the first insulating member 400, the sealing ring 200 and the cover plate 100 from causing the damage of the sealing ring 200, thereby improving the service life of the sealing ring 200.

[0043] Further, the battery top cover further comprises a second insulating member 500, the second insulating member 500 abuts against the lower surface of the cover plate 100, and the second insulating member 500 is arranged between the lower pole 320 and the cover plate 100, so as to ensure the insulation between the lower pole 320 and the cover plate 100.

[0044] Optionally, the second insulation piece 500 can be provided with a second limiting groove, the lower surface of the cover plate 100 is provided with a protruding part, the protruding part can be limited in the second limiting groove, the positioning between the second insulation piece 500 and the cover plate 100 is facilitated, and relative movement between the second insulation piece 500 and the cover plate 100 is prevented during assembly of the battery top cover.

[0045] Further, the battery top cover further comprises an explosion-proof valve 600, the cover plate 100 is further provided with an explosion-proof hole 150, and the explosion-proof valve 600 is connected to the cover plate 100 and covers the explosion-proof hole 150. The explosion-proof valve 600 is provided with a notch, the thickness of the explosion-proof valve 600 at the notch is smaller, when the internal pressure of the battery structure is too large, high-pressure gas flows into the explosion-proof hole 150, the notch can be broken under the action of the high-pressure gas, so that the high-pressure gas is released, the exhaust of the battery interior is realized, and the safety of the battery structure is ensured.

[0046] Optionally, the explosion-proof structure further comprises an explosion-proof sheet, the explosion-proof valve 600 is connected to one side of the cover plate 100 facing the battery interior, and the explosion-proof sheet is connected to the other side of the cover plate 100 away from the battery interior and covers the explosion-proof hole 150, so that the explosion-proof valve 600 is prevented from being scratched by foreign matters during assembly or use of the battery top cover, and the function of the explosion-proof valve 600 is ensured to be good.

[0047] Further, the cover plate 100 is further provided with a liquid injection hole 160, the electrolyte can be added to the battery interior, the liquid level of the electrolyte is controlled, and the normal work of the battery is ensured.

[0048] The embodiment further provides a single battery, which comprises a shell, a battery cell and the above-mentioned battery top cover, the battery cell is fixed in the shell, the safety of the battery cell is protected, the battery cell is electrically connected with the pole 300, the power transmission between the battery cell and an electric device is realized, the battery top cover and the shell are closed and connected, and the sealing property of the single battery is ensured. The single battery is assembled by using the above-mentioned battery top cover, has good sealing effect, is convenient to assemble, and is favorable for improving the yield of the single battery.

[0049] Obviously, the above-mentioned embodiment of the utility model is only for clearly illustrating the utility model, and is not the limitation of the embodiment of the utility model. For ordinary skilled in the art, on the basis of the above-mentioned description, other different forms of changes or changes can be made. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery top cover, characterized in that, include: A cover plate (100) is provided with an electrode post hole (110) and an annular groove (120). The annular groove (120) is provided on the upper surface of the cover plate (100) and surrounds the electrode post hole (110). A sealing ring (200) is located within the annular groove (120), and in a first direction, the thickness of the sealing ring (200) is greater than the depth of the annular groove (120).

2. The battery top cover according to claim 1, characterized in that, The battery top cover also includes a terminal post (300), which passes through the terminal post hole (110) and abuts against the sealing ring (200) in the first direction.

3. The battery top cover according to claim 2, characterized in that, The pole post (300) includes an upper pole post (310), a lower pole post (320), and a through part (330). The upper pole post (310) is located above the cover plate (100) in the first direction, and the lower pole post (320) is located below the cover plate (100) in the first direction. The through part (330) connects the upper pole post (310) and the lower pole post (320) and passes through the pole post hole (110).

4. The battery top cover according to claim 1, characterized in that, The battery top cover also includes a first insulating element (400) located above the cover plate (100), and the sealing ring (200) is compressed between the first insulating element (400) and the cover plate (100).

5. The battery top cover according to claim 4, characterized in that, The cover plate (100) is also provided with a first limiting groove (130), the first limiting groove (130) is provided on the upper surface of the cover plate (100), and the first insulating member (400) is limited to the first limiting groove (130).

6. The battery top cover according to claim 5, characterized in that, The cover plate (100) further includes a receiving groove (140), the receiving groove (140) is located on the bottom surface of the first limiting groove (130), and the annular groove (120) is disposed on the bottom surface of the receiving groove (140).

7. The battery top cover according to claim 1, characterized in that, The battery top cover also includes a second insulating member (500) that abuts against the lower surface of the cover plate (100).

8. The battery top cover according to claim 1, characterized in that, The battery top cover also includes an explosion-proof valve (600), and the cover plate (100) is also provided with an explosion-proof hole (150). The explosion-proof valve (600) is connected to the cover plate (100) and covers the explosion-proof hole (150).

9. The battery top cover according to claim 1, characterized in that, The cover plate (100) is also provided with a liquid injection hole (160).

10. A single-cell battery, characterized in that, The battery includes a housing, a battery cell, and a battery top cover as described in any one of claims 1-9, wherein the battery cell is fixed inside the housing, and the battery top cover and the housing are closedly connected.

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