Battery cover structure avoiding missing seal

Abstract

The application discloses a battery cover plate structure capable of avoiding seal leakage, which comprises a top cover plate, an upper insulating part, a lower insulating part, a pole, a seal and a busbar. The upper insulating part is arranged above the top cover plate, and an upper surface of the upper insulating part is provided with at least one first exhaust groove. The lower insulating part is arranged below the top cover plate, and an upper surface of the lower insulating part is provided with at least one second exhaust groove. The pole is inserted into the interior of the upper insulating part and extends outward, and a rivet is pressed into the interior of the pole to fix the pole, the upper insulating part, the top cover plate and the lower insulating part. The seal is arranged in the interior of the top cover plate and the lower insulating sleeve and surrounds the outer circle of the rivet. The busbar is connected to the bottom of the rivet. The first exhaust groove and the second exhaust groove are respectively arranged on the upper insulating part and the lower insulating part, so that whether the seal is leaked can be detected during the air tightness detection, false seal between various parts of the cover plate assembly is avoided, and the air tightness of the cover plate assembly is ensured.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and specifically discloses a battery cover structure to avoid the leakage of sealing components. Background Technology

[0002] With the development of the new energy industry, especially the rapid development of the new energy vehicle industry, the use of lithium batteries is also increasing. Compared with traditional batteries, lithium batteries have advantages such as high energy density, high working voltage, light weight, small size, low self-discharge, no memory effect, long cycle life, and fast charging. At the same time, they are more environmentally friendly than traditional batteries. With the development of lithium batteries, traditional batteries such as lead-acid batteries are gradually being phased out.

[0003] The cover assembly is used to seal the battery casing of lithium batteries. It mainly includes an upper cover, upper insulating component, lower insulating component, sealing component, and terminal post. In the production process, these components are generally assembled together by riveting. After riveting, the various components will have a certain sealing effect due to compression. However, if the sealing component is missing during the assembly process, it is easy to misjudge whether the air tightness is qualified. As a result, the abnormal air leakage can only be discovered when the finished battery is used.

[0004] To address the aforementioned issues, this application discloses a battery cover structure that prevents the sealing element from being missing. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model discloses a battery cover structure that avoids the leakage of sealing components.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a battery cover structure to prevent leakage of the sealing component, comprising a top cover plate, an upper insulating component, a lower insulating component, a terminal post, a sealing component, and a busbar; the upper insulating component is located above the top cover plate, and at least one first vent groove is formed on the upper surface of the upper insulating component; the lower insulating component is located below the top cover plate, and at least one second vent groove is formed on the upper surface of the lower insulating component; the terminal post is inserted into the interior of the upper insulating component and extends outward, and a rivet is pressed into the interior of the terminal post to fix it to the upper insulating component, the top cover plate, and the lower insulating component; the sealing component is fitted inside the top cover plate and the lower insulating component, around the outer ring of the rivet; the busbar is connected to the bottom of the rivet.

[0007] More preferably, the upper surface of the top cover plate has explosion-proof grooves that do not form a closed loop.

[0008] More preferably, the top cover plate and the upper insulating component are coaxially provided with pressure relief holes.

[0009] More preferably, the upper surface of the upper insulating member has a positioning cavity, and the pole post is inserted into the positioning cavity and extends outward.

[0010] More preferably, the rivet has a T-shaped groove on its periphery and the pole post has a stepped groove inside, so that when the rivet is pressed into the pole post, the step of the stepped groove is embedded into the T-shaped groove.

[0011] More preferably, the sealing element is a sealing ring made of fluororubber.

[0012] This utility model achieves the following beneficial effects: 1. This application provides a first vent groove and a second vent groove on the upper and lower insulating parts, respectively, which can detect whether the sealing parts are missing during the airtightness test, thereby avoiding false seals between the various components of the cover plate assembly and ensuring the airtightness of the cover plate assembly.

[0013] 2. This application provides explosion protection by creating non-closed-loop explosion-proof grooves on the upper surface of the top cover plate, which reduces production costs compared to the existing technology that uses welded explosion-proof films.

[0014] 3. This application makes T-shaped grooves on the rivets and step grooves on the pole posts, so that the rivets and pole posts can fit tightly after the rivets are pressed together. The interior is very small, which can effectively ensure the airtightness of the entire cover plate assembly.

[0015] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and drawings. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the specification, serve to explain the principles of the disclosure.

[0017] Figure 1 This is a schematic diagram of the overall structure disclosed in this utility model; Figure 2 This is a cross-sectional structural diagram of the present utility model. Figure 3 This is a schematic diagram of the upper and lower insulating components disclosed in this utility model; In the diagram: 10. Top cover plate; 11. Pressure relief hole; 12. Explosion-proof groove; 20. Upper insulating component; 21. First exhaust groove; 22. Positioning cavity; 30. Lower insulating component; 31. Second exhaust groove; 40. Pole post; 41. Step groove; 50. Rivet; 51. T-groove; 60. Sealing component; 70. Combination plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Example

[0020] To address the issue that existing lithium battery cover assemblies are prone to false seals after riveting, making it impossible to detect leaks through airtightness testing and thus determine if any seals are missing, which can lead to leaks in the manufactured lithium batteries during use, [reference needed]. Figure 1 and Figure 2 As shown, this application discloses a battery cover structure to prevent the sealing element 60 from being missing, including a top cover plate 10, an upper insulating element 20, a lower insulating element 30, a terminal post 40, a sealing element 60, and a busbar 70; the upper insulating element 20 is disposed above the top cover plate 10, and at least one first vent groove 21 is formed on the upper surface of the upper insulating element 20; the lower insulating element 30 is disposed below the top cover plate 10, and at least one second vent groove 31 is formed on the upper surface of the lower insulating element 30; the terminal post 40 is inserted into the interior of the upper insulating element 20 and extends outward, and a rivet 50 is pressed into the interior of the terminal post 40 to fix it to the upper insulating element 20, the top cover plate 10, and the lower insulating element 30; the sealing element 60 is sleeved on the outer ring of the rivet 50 inside the top cover plate 10 and the lower insulating element 30, and the sealing element 60 is preferably a sealing ring made of fluororubber material; the busbar 70 is connected to the bottom of the rivet 50. Based on the above battery cover structure, when performing helium leak testing, if the first vent 21 is vented to the second vent 31, it indicates that the seal 60 is not installed; conversely, if the first vent 21 is not vented to the second vent 31, it indicates that the seal 60 is installed. This avoids false seals between the various components of the cover assembly and ensures the airtightness of the cover assembly.

[0021] To prevent the lithium battery from exploding due to excessive internal pressure, this application provides an explosion-proof groove 12 that does not form a closed loop on the upper surface of the top cover plate 10. When the internal pressure of the battery is too high, the explosion-proof groove 12 will automatically crack open, releasing the internal pressure of the battery. This allows for pressure relief and ensures the safety of the lithium battery. In addition, by providing the explosion-proof groove 12 on the top cover plate 10, compared with the existing technology of using a welded explosion-proof film, production costs can be reduced.

[0022] In order to enable the top cover plate 10 to have a pressure relief function, this application also provides a pressure relief hole 11 coaxially on the top cover plate 10 and the upper insulating member 20. This part of the technology is known and will not be described in detail here.

[0023] In one specific embodiment, the present application provides a positioning cavity 22 on the upper surface of the upper insulating member 20, and the pole post 40 is inserted into the positioning cavity 22 and extends outward. In this way, the pole post 40 and the upper insulating member 20 can be installed insulatedly, and the use effect is better.

[0024] In a preferred embodiment, the present application provides a T-shaped groove 51 on the periphery of the rivet 50 and a stepped groove 41 inside the pole post 40. When the rivet 50 is pressed into the inside of the pole post 40, the step of the stepped groove 41 is embedded into the inside of the T-shaped groove 51. After the rivet 50 is pressed, the rivet 50 and the pole post 40 can fit tightly together. The inside is very small, so as to effectively ensure the airtightness of the entire cover plate assembly.

[0025] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A battery cover structure to prevent leakage of seals, characterized in that, The device includes a top cover plate (10), an upper insulating component (20), a lower insulating component (30), a terminal post (40), a sealing component (60), and a manifold (70). The upper insulating component (20) is located above the top cover plate (10), and at least one first vent groove (21) is provided on the upper surface of the upper insulating component (20). The lower insulating component (30) is located below the top cover plate (10), and at least one second vent groove (31) is provided on the upper surface of the lower insulating component (30). The terminal post (40) is inserted into the upper insulating component (20) and extends outward. A rivet (50) is pressed into the inside of the terminal post (40) to fix it to the upper insulating component (20), the top cover plate (10), and the lower insulating component (30). The sealing component (60) is fitted inside the top cover plate (10) and the lower insulating component, around the outer ring of the rivet (50). The manifold (70) is connected to the bottom of the rivet (50).

2. The battery cover structure for preventing leakage of seals according to claim 1, characterized in that, The upper surface of the top cover plate (10) is provided with explosion-proof grooves (12) that do not form a closed loop.

3. The battery cover structure for preventing leakage of the sealing element according to claim 1, characterized in that, The top cover plate (10) and the upper insulating component (20) are coaxially provided with pressure relief holes (11).

4. The battery cover structure for preventing leakage of the sealing element according to claim 1, characterized in that, The upper surface of the upper insulating member (20) is provided with a positioning cavity (22), and the pole post (40) is inserted into the positioning cavity (22) and extends outward.

5. The battery cover structure for preventing leakage of the sealing element according to claim 1, characterized in that, The rivet (50) has a T-shaped groove (51) on its periphery, and the pole post (40) has a stepped groove (41) inside. When the rivet (50) is pressed into the pole post (40), the step of the stepped groove (41) is embedded into the T-shaped groove (51).

6. The battery cover structure for preventing leakage of the sealing element according to claim 1, characterized in that, The sealing element (60) is a fluororubber sealing ring.

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