Battery top cover assembly and battery

Abstract

The utility model provides a battery top cover assembly and battery wherein the battery top cover assembly comprises: a top cover, a pole, a first sealing element and a second sealing element, the upper surface of the top cover is provided with a recess, and the recess is provided with a through mounting hole; the pole is arranged in the mounting hole in a penetrating manner; the first sealing element is sleeved on the pole, and at least part of the first sealing element is arranged between the upper surface of the concave part and the pole; and the second sealing element is arranged on the pole in a sleeving manner, is arranged between the lower surface of the top cover and the pole, and is provided with a communication channel for communicating the mounting hole with the battery inner cavity. The utility model solves the problem that the upper sealing ring in the prior art is not easy to find when being missed during installation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field, specifically, relate to a battery top cover subassembly and battery. BACKGROUND

[0002] The battery top cover subassembly plays a dual key role in the operation of the battery: it not only plays a role of connecting the internal and external electronic channels during the use of the battery, but also can play a sealing role for isolating the internal and external of the battery. The sealing element, as a component part of the top cover subassembly, plays a sealing role. The commonly used sealing element is a sealing ring. The positive and negative pole columns of the top cover subassembly are usually each provided with two sealing rings, which are an upper sealing ring located on the upper side of the top cover (the side away from the interior of the battery) and a lower sealing ring located on the lower side of the top cover (the side facing the interior of the battery). Among them, the upper sealing ring plays a main sealing role, and the lower sealing ring plays a secondary sealing role. In the existing assembly process, once the upper sealing ring is missed during installation, due to the existence of the lower sealing ring, the traditional helium leak detection cannot detect this omission, which leads to that the battery seems to be normally functional in the short term, but actually hides a long-term use safety hazard, that is, the electrolyte of the battery may leak, thereby posing a major threat to the reliability and life of the battery. SUMMARY

[0003] The main purpose of the utility model is to provide a battery top cover subassembly and a battery to solve the problem that the upper sealing ring in the prior art is not easy to be found when it is missed during installation.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery top cover subassembly is provided, which comprises: a top cover, a pole column, a first sealing element and a second sealing element. The upper surface of the top cover has a recess, and the recess has a mounting hole penetratingly arranged. The pole column is arranged at the mounting hole. The first sealing element is sleeved on the pole column, and at least part of the first sealing element is arranged between the upper surface of the recess and the pole column. The second sealing element is sleeved on the pole column, and the second sealing element is arranged between the lower surface of the top cover and the pole column. The second sealing element has a communication channel for communicating the mounting hole and the inner cavity of the battery.

[0005] Further, the second sealing element has an annular structure, and the communication channel penetrates through the inner and outer sides along the radial direction of the annular structure.

[0006] Further, the communication channel is a plurality of channels, and each communication channel is arranged at intervals along the circumferential direction of the annular structure.

[0007] Further, along the circumferential direction of the annular structure, the distance between the two sides of the communication channel is not less than 0.1mm.

[0008] Further, the communication channels are uniformly distributed along the circumferential direction of the annular structure.

[0009] Further, the first sealing member comprises a first segment and a second segment connected by bending, the first segment is located between the upper surface of the recess and the pole post, and the second segment is located between the circumferential side of the mounting hole and the pole post.

[0010] Further, the bottom end of the second segment is in abutment with the second sealing member.

[0011] Further, the pole post comprises a first pole post and a second pole post connected with each other, the first pole post is arranged above the mounting hole, the second pole post is arranged below the mounting hole, the first pole post and the second pole post are in contact and conductive through the mounting hole, at least part of the first sealing member is arranged between the first pole post and the top cover, and the second sealing member is arranged between the second pole post and the top cover.

[0012] Further, the battery top cover assembly further comprises an upper plastic and a lower plastic, at least part of the upper plastic is located between the first pole post and the inner wall of the recess, the upper plastic is provided with an upper through hole, the first sealing member is arranged on the inner circumferential side of the upper through hole, the lower plastic is located at the lower surface of the top cover and at least part of the lower plastic is located between the second pole post and the top cover, the lower plastic is provided with a lower through hole, and the second sealing member is arranged on the inner circumferential side of the lower through hole.

[0013] According to another aspect of the utility model, a battery is provided, comprising the above-mentioned battery top cover assembly.

[0014] The utility model discloses the technical scheme, through the communication passage of second sealing member arrangement, after installing second sealing member, communication passage can communicate battery inner chamber with mounting hole, thereby guaranteeing the communication of battery inner chamber and outside, like this, when battery assembly process, the situation of missing first sealing member appears, can be found in time through airtightness detection, thereby avoiding the situation that missing first sealing member causes battery electrolyte leakage, can effectively prevent the leakage of battery internal electrolyte, improves the safety and reliability of battery, reduces the battery failure caused by electrolyte leakage. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the utility model, and together with the exemplary embodiments of the utility model and their description, serve to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 The structure schematic view of the battery top cover assembly of the utility model is shown;

[0017] Figure 2 The exploded view of Figure 1 is shown;

[0018] Figure 3 The sectional view of the battery top cover assembly is shown;

[0019] Figure 4 The sectional view of the battery top cover assembly is shown;Figure 3 a local enlarged view of the second seal;

[0020] Figure 5 a structural schematic view of the second seal is shown;

[0021] Figure 6 a side view of the second seal is shown.

[0022] Among them, the above drawings include the following reference signs:

[0023] 10, top cover; 11, recess; 111, mounting hole; 20, pole; 21, first pole; 22, second pole; 30, first seal; 31, first section; 32, second section; 40, second seal; 41, communication passage; 50, upper plastic; 60, lower plastic; 70, explosion-proof sheet; 80, explosion-proof sheet protection sticker. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0026] In the present application, unless otherwise stated, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves. Similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0027] In order to solve the problem that the upper sealing ring is easily missed during installation and is not easy to be found in the prior art, the present application provides a battery top cover assembly and a battery, wherein the battery comprises the following battery top cover assembly.

[0028] As shown in Figures 1 to 6 A battery top cover assembly, comprising: a top cover 10, a pole 20, a first seal 30 and a second seal 40, the upper surface of the top cover 10 has a recess 11, the recess 11 has a mounting hole 111 arranged through; the pole 20 is arranged at the mounting hole 111; the first seal 30 is sleeved on the pole, and at least part of the first seal 30 is arranged between the upper surface of the recess 11 and the pole 20; the second seal 40 is sleeved on the pole 20, and the second seal 40 is arranged between the lower surface of the top cover 10 and the pole 20, the second seal 40 has a communication passage 41 for communicating the mounting hole 111 and the inner cavity of the battery.

[0029] In this embodiment, a communication channel 41 is provided in the second seal 40, so that after the second seal 40 is installed, the communication channel 41 can connect the battery cavity and the mounting hole 111, thereby ensuring the communication between the battery cavity and the outside. In this way, if the first seal 30 is missing during the battery assembly process, it can be detected in time by air tightness detection, thereby avoiding leakage of battery electrolyte caused by the missing first seal 30. This can effectively prevent leakage of battery electrolyte, improve battery safety and reliability, and reduce battery failures caused by electrolyte leakage.

[0030] It should be noted that in this embodiment, the first sealing element 30 plays a primary sealing role, while the second sealing element 40 plays an auxiliary sealing role. That is, even if the second sealing element 40 is provided with a connecting channel 41, an effective sealing effect can still be achieved if the first sealing element 30 is installed.

[0031] like Figure 5 As shown, in this embodiment, the second seal 40 has an annular structure, and the connecting channel 41 extends radially through both the inner and outer sides of the annular structure. This allows gas inside the battery cavity to diffuse to the outside of the battery through the connecting channel 41 when the first seal 30 is not present, enabling timely detection through airtightness testing and preventing the first seal 30 from being missing. Specifically, in this embodiment, the second seal 40 is configured as a sealing ring, which provides a more uniform sealing effect and effectively prevents electrolyte leakage caused by poor local sealing. The connecting channel 41 extends through both the inner and outer sides of the sealing ring. This means that when the first seal 30 is not present, the connecting channel 41 can connect the inner cavity of the battery and the outside of the top cover 10. This allows gas in the inner cavity of the battery to flow into the outer side of the sealing ring, then into the connecting channel 41, then into the inner side of the sealing ring, and finally into the mounting hole 111 on the inner side of the sealing ring. In this way, when the first seal 30 between the recess 11 and the terminal post 20 is missing, the gas can flow out of the battery through the mounting hole 111, thereby enabling the detection of the presence and effectiveness of the first seal 30. Of course, the shape of the second seal 40 can be changed according to the shape of the mounting hole 111 and the pole post 20. For example, when the pole post 20 is rectangular or cubic and the mounting hole 111 is square, the second seal 40 can be set as a square structure with a central hole. A connecting channel 41 can be set at the corner or the middle of the side of the square structure. The connecting channel 41 can connect the central hole and the outer edge of the second seal 40, so as to ensure that gas can still be detected when the airtightness test is performed after the second seal 40 is installed, so as to avoid the situation of missing the first seal 30.

[0032] In the embodiment, the communication channels 41 are multiple, and each communication channel 41 is arranged along the circumferential direction of the annular structure, so that on the one hand, when the first sealing member 30 is missing, the gas leakage can be detected at multiple positions along the circumferential direction of the second sealing member 40, thereby avoiding inaccurate inspection, and on the other hand, the multiple communication channels 41 can ensure the amount of gas discharged, so that the cross section of each communication channel 41 can be reduced accordingly, thereby ensuring that the second sealing member 40 can cooperate with the first sealing member 30 after the first sealing member 30 is installed to improve the sealing effect, thereby avoiding that the cross section of each communication channel 41 is too large to affect the sealing effect.

[0033] In the embodiment, the distance between the two sides of the communication channel 41 along the circumferential direction of the annular structure is not less than 0.1 mm, so as to ensure that the size of the communication channel 41 is sufficient to meet the demand of gas discharge, thereby avoiding that the gas is difficult to overflow and leading to inaccurate air tightness detection. In this way, the second sealing member 40 can ensure the cooperation with the first sealing member 30 to realize the sealing of the battery while allowing a small amount of gas to be discharged when the first sealing member 30 is missing, so as to avoid missing the first sealing member 30.

[0034] In the embodiment, the communication channels 41 are uniformly distributed along the circumferential direction of the annular structure, so as to ensure that the gas in the battery cavity is uniformly discharged, thereby making it unnecessary to be limited to a specific position on the side of the first sealing member 30 when performing air tightness detection, so as to ensure the accuracy of air tightness detection.

[0035] In the embodiment, the first sealing member 30 includes a first section 31 and a second section 32 connected by bending, the first section 31 is located between the upper surface of the recess 11 and the pole 20, and the second section 32 is located between the circumferential side of the mounting hole 111 and the pole 20, so as to ensure the sealing effect. Specifically, the first sealing member 30 of the embodiment is also arranged as an annular structure to provide more comprehensive sealing effect for the battery. The inner diameters of the first section 31 and the second section 32 are the same, and the outer diameter of the first section 31 is larger than that of the second section 32, so that the first sealing member 30 forms an L-shaped longitudinal section. In this way, the second section 32 can realize the sealing between the mounting hole 111 and the pole 20 to realize the sealing between the top cover 10 and the pole 20, and the first section 31 extends a certain distance away from the mounting hole 111 relative to the second section 32, thereby further improving the sealing effect between the pole 20 and the top cover 10.

[0036] As Figure 4As shown, in the present embodiment, the bottom end of the second section 32 abuts against the second seal 40. The second seal 40 of the present embodiment cannot function as a seal by itself due to the provision of the communication passage 41, and the sealing effect of the second seal 40 needs to be achieved by cooperation with the first seal 30. Specifically, the present embodiment is described by way of example with the first seal 30 and the second seal 40 arranged in an up-down direction along the axial direction of the mounting hole 111. After the battery is assembled, the first seal 30 is arranged above the second seal 40, and the first seal 30 is deformed by being pressed by the pole 20, the top cover 10, and the like to achieve a sealing effect. The upper surface of the second seal 40 abuts against the lower surface of the second section 32, so that the first seal 30 and the second seal 40 are deformed by being pressed by the pole 20, the top cover 10, and the like in the up-down direction, and the communication passage 41 is blocked to achieve a double seal, thereby further improving the sealing effect.

[0037] The communication passage 41 of the present embodiment can be provided on the upper surface of the second seal 40, or on the lower surface of the second seal 40, or on both the upper surface and the lower surface of the second seal 40, so as to ensure that the second seal 40 can allow gas to pass through when the first seal 30 is not installed, and to meet the requirement of air tightness detection. When the communication passage 41 is provided on only one surface of the second seal 40, or when the shapes of the upper surface and the lower surface are different, the front and back surfaces of the second seal 40 can be identified by optical detection. The shape of the communication passage 41 can be a regular rectangle as shown, or can be an irregular shape, as long as the communication passage 41 can communicate between the inside and the outside of the second seal 40. Figure 5 、 Figure 6 The shape of the communication passage 41 can be a regular rectangle as shown, or can be an irregular shape, as long as the communication passage 41 can communicate between the inside and the outside of the second seal 40.

[0038] In the embodiment, the pole post 20 comprises a first pole post 21 and a second pole post 22 connected together, the first pole post 21 is arranged above the mounting hole 111, the second pole post 22 is arranged below the mounting hole 111, the first pole post 21 and the second pole post 22 are in contact through the mounting hole 111, at least part of the first sealing member 30 is arranged between the first pole post 21 and the top cover 10, and the second sealing member 40 is arranged between the second pole post 22 and the top cover 10. Specifically, the first pole post 21 is arranged in a column shape, the second pole post 22 is also arranged in a column shape, the first pole post 21 has a first column body and a protrusion towards the second pole post 22, the protrusion protrudes from a central region of the first column body, and the protrusion is closer to the second pole post 22 than the first column body. The second pole post 22 has a center with a recess 11 towards the first pole post 21, the protrusion is located in the recess 11, and the protrusion is connected with a through hole on the second pole post 22 to form the pole post 20. The first sealing member 30 and the second sealing member 40 are arranged between the first column body and the second pole post 22, the first sealing member 30 realizes sealing between the first pole post 21 and the top cover 10, and the second sealing member 40 cooperates with the first sealing member 30 to realize sealing between the second pole post 22 and the top cover 10, thereby providing a comprehensive sealing effect for the battery, preventing electrolyte leakage, and ensuring the reliability of the battery.

[0039] In the embodiment, the battery top cover assembly further comprises an upper plastic 50 and a lower plastic 60, at least part of the upper plastic 50 is located between the first pole post 21 and the inner wall of the recess 11, the upper plastic 50 is provided with an upper through hole, the first sealing member 30 is arranged on the inner peripheral side of the upper through hole, the lower plastic 60 is located at the lower surface of the top cover 10 and at least part of the lower plastic 60 is located between the second pole post 22 and the top cover 10, the lower plastic 60 is provided with a lower through hole, and the second sealing member 40 is arranged on the inner peripheral side of the lower through hole. The structure of the upper plastic 50 in the embodiment matches the outer shape of the recess 11, since the recess 11 is arranged in a rectangular shape, the lower surface of the upper plastic 50 is also arranged in a rectangular shape, thereby enabling the upper plastic 50 to be embedded in the recess 11, the upper through hole of the upper plastic 50 has a diameter larger than the mounting hole 111, in this way, the first sealing member 30 is arranged on the outer peripheral side of the mounting hole 111 and on the inner peripheral side of the upper through hole, to ensure the installation position of the first sealing member 30, thereby realizing effective sealing between the pole post 20 and the top cover 10. The lower plastic 60 in the embodiment is arranged in a plate shape, the lower plastic 60 has a lower through hole with a diameter larger than the second sealing member 40 and smaller than the outer diameter of the second pole post 22, thereby enabling the second sealing member 40 to be arranged on the inner peripheral side of the lower through hole, and the lower surface of the second sealing member 40 can abut against the second pole post 22, to avoid displacement of the second sealing member 40 affecting the sealing effect. In addition, the upper plastic 50 and the lower plastic 60 can provide additional mechanical protection, thereby being able to resist severe mechanical impact and vibration, protecting the battery from damage and preventing electrolyte leakage.

[0040] It should be noted that since the pole 20 of the battery generally has a positive pole and a negative pole, the first seal 30 and the second seal 40, etc. are each provided two, respectively at the positive pole and the negative pole.

[0041] As shown in Figure 1 、 2 、 Figure 3 The battery top cover assembly of the embodiment also has a rupture disc 70 and a rupture disc protection sticker 80, the middle region of the top cover 10 has a rupture disc through hole, the rupture disc 70 is arranged in the rupture disc through hole, and the rupture disc protection sticker 80 is arranged at the position corresponding to the rupture disc 70 on the upper surface of the top cover 10 to protect the rupture disc 70.

[0042] It should be noted that the plurality of in the above embodiment means at least two.

[0043] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0044] 1. The problem that the upper sealing ring in the prior art is easily missed during installation and is not easy to be found is solved.

[0045] 2. By arranging the communication channel in the second seal, after the second seal is installed, the communication channel can communicate the battery inner cavity and the mounting hole, so as to ensure the communication between the battery inner cavity and the outside. In this way, when the first seal is missed during the battery assembly process, it can be found in time through the air tightness detection, so as to avoid the situation that the battery leaks due to the missing of the first seal, effectively prevent the leakage of the electrolyte in the battery, improve the safety and reliability of the battery, and reduce the battery failure caused by the leakage of the electrolyte.

[0046] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0047] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0048] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0049] The preferred embodiments of the present application have been described above with the specific details. Obviously, the present application can be carried out without the specific details. It is to be understood that the above-described embodiments are only used to illustrate the present application, and the present application can be modified and changed in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery top cover assembly, characterized in that, include: Top cover (10), the upper surface of the top cover (10) has a recess (11), the recess (11) has a through mounting hole (111); A pole post (20) is inserted through the mounting hole (111); A first sealing element (30) is sleeved on the pole post (20), and at least a portion of the first sealing element (30) is disposed between the upper surface of the recess (11) and the pole post (20). The second sealing element (40) is sleeved on the pole post (20) and is disposed between the lower surface of the top cover (10) and the pole post (20). The second sealing element (40) has a communication channel (41) for communicating the mounting hole (111) and the battery cavity.

2. The battery top cover assembly according to claim 1, characterized in that, The second seal (40) has an annular structure, and the connecting channel (41) extends radially through both the inner and outer sides of the annular structure.

3. The battery top cover assembly according to claim 2, characterized in that, There are multiple connecting channels (41), and each connecting channel (41) is arranged at intervals along the circumference of the annular structure.

4. The battery top cover assembly according to claim 2, characterized in that, Along the circumference of the annular structure, the distance between the two sides of the connecting channel (41) is not less than 0.1 mm.

5. The battery top cover assembly according to claim 3, characterized in that, The connecting channels (41) are evenly distributed along the circumference of the annular structure.

6. The battery top cover assembly according to claim 2, characterized in that, The first sealing element (30) includes a first section (31) and a second section (32) that are bent and connected. The first section (31) is located between the upper surface of the recess (11) and the pole post (20), and the second section (32) is located between the circumferential side of the mounting hole (111) and the pole post (20).

7. The battery top cover assembly according to claim 6, characterized in that, The bottom end of the second segment (32) abuts against the second seal (40).

8. The battery top cover assembly according to claim 1, characterized in that, The pole post (20) includes a first pole post (21) and a second pole post (22) connected to each other. The first pole post (21) is disposed above the mounting hole (111), and the second pole post (22) is disposed below the mounting hole (111). The first pole post (21) and the second pole post (22) are in contact and connected by passing through the mounting hole (111). At least a portion of the first sealing member (30) is disposed between the first pole post (21) and the top cover (10), and the second sealing member (40) is disposed between the second pole post (22) and the top cover (10).

9. The battery top cover assembly according to claim 8, characterized in that, The battery top cover assembly further includes an upper plastic (50) and a lower plastic (60). At least a portion of the upper plastic (50) is located between the first electrode post (21) and the inner wall of the recess (11), and the upper plastic (50) has an upper through hole. The first sealing member (30) is disposed on the inner circumferential side of the upper through hole. The lower plastic (60) is located on the lower surface of the top cover (10) and at least a portion is located between the second electrode post (22) and the top cover (10). The lower plastic (60) has a lower through hole, and the second sealing member (40) is disposed on the inner circumferential side of the lower through hole.

10. A battery, characterized in that, Includes the battery top cover assembly according to any one of claims 1 to 9.

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