High-stability battery cover plate structure

Abstract

The utility model discloses a high-stability battery cover plate structure which comprises a cover plate, an anti-explosion hole is formed in the middle of the cover plate, and pole holes are formed in the two sides of the anti-explosion hole; a protrusion is arranged on the periphery of the anti-explosion hole, internal threads are arranged on the inner wall of the protrusion, an annular fixing step is arranged in the anti-explosion hole, and an annular groove is formed in the fixing step. An anti-explosion piece is arranged on the fixed step, a thin film is arranged in the middle of the anti-explosion piece, and a curled edge is integrally connected to the edge of the outer side of the thin film, is arranged in the groove and is welded and fixed; a rubber ring is arranged in the groove and is tightly pressed through a protective cover; a post is arranged in the post hole, a retainer ring is arranged at the top of the post hole, and an upper rubber ring is arranged below the retainer ring; the pole is in an inverted T shape and sleeved with a lower rubber ring, external threads are arranged at the end, exposed out of the pole hole, of the pole, and the pole is fixedly connected with the cover plate through a nut. The protective cover is novel in structure, detachable and convenient to maintain; meanwhile, the sealing performance of the explosion-proof sheet, the pole and the cover plate is greatly improved, and the risk of leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of battery shells, in particular to a high-stability battery cover plate structure. Background Art

[0002] As an important part of the battery, the battery cover plate's structural design and material selection have a significant impact on the battery's performance, safety and service life. The main function of the battery cover plate is to protect the battery's internal components, such as the positive and negative electrodes, electrolytes, etc., from being affected and damaged by the external environment.

[0003] At present, explosion-proof plates and poles are set on the battery cover; the general explosion-proof plate protection structure is connected to the cover by welding. Once the explosion-proof plate ruptures and releases pressure due to the increase of internal pressure in the battery, it is very convenient to replace or repair it; the explosion-proof plate and the cover are welded, and the treatment requirements for the weld are high, and the sealing cannot be guaranteed; at the same time, leakage often occurs at the connection between the pole and the cover. Therefore, it is urgent to propose a cover structure with a more stable connection structure to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a high-stability battery cover plate structure with a stable installation structure.

[0005] The purpose of the utility model is achieved as follows: a high-stability battery cover plate structure, comprising a cover plate, wherein an explosion-proof hole is provided in the middle of the cover plate, and pole holes are provided on both sides of the explosion-proof hole;

[0006] The periphery of the explosion-proof hole is provided with a protrusion, the inner wall of the protrusion is provided with an internal thread, an annular fixed step is provided in the explosion-proof hole, and an annular groove is provided on the fixed step; an explosion-proof disk is provided on the fixed step, the middle part of the explosion-proof disk is a film, and the outer edge of the film is integrally connected with a curling edge, and the curling edge is placed in the groove and fixed by welding; a rubber ring is provided in the groove, and the rubber ring is pressed by a protective cover;

[0007] A pole is arranged in the pole hole, a retaining ring is arranged at the top of the pole hole, and an upper rubber ring is arranged below the retaining ring; the pole is an inverted T-shape, a lower rubber ring is sleeved on the pole, an end of the pole exposed from the pole hole is provided with an external thread, and the pole is connected and fixed to the cover plate by a nut.

[0008] Preferably, a concave groove is provided at the junction of the retaining ring and the pole hole, and a raised ring is provided on the periphery of the top of the upper rubber ring, and the raised ring is embedded in the concave groove.

[0009] Preferably, an O-ring is provided on the upper side of the inner diameter surface of the retaining ring.

[0010] Preferably, the inner diameter surface of the upper rubber ring is larger at the top and smaller at the bottom, the outer diameter surface of the lower rubber ring is smaller at the top and larger at the bottom, and the inner diameter surface of the upper rubber ring fits with the outer diameter surface of the lower rubber ring.

[0011] Preferably, a continuous external thread is provided at the bottom of the protective cover, and a plurality of through holes are provided on the outer wall above the external thread of the protective cover; the protective cover is connected to the explosion-proof hole through threads, and the sleeve wall thickness of the protective cover is greater than the diameter of the rubber ring and less than the width of the groove.

[0012] Preferably, a welding point is provided between the nut and the cover plate for fixing.

[0013] Compared with the prior art, the utility model is beneficial in that:

[0014] 1. Optimize the design of the explosion-proof hole and explosion-proof disk structure to ensure that the explosion-proof disk can be quickly installed in the groove of the explosion-proof hole. At the same time, install the rubber ring in the groove and align and press it through the protective cover to achieve secondary sealing of the rubber ring on the weld to prevent leakage;

[0015] 2. The protective cover is tightened by threads, which is convenient for disassembly and installation, and for replacing the internal explosion-proof disk. At the same time, the rotating protective cover also facilitates the downward pressure of the sealing ring; multiple through holes are set on the outside of the protective cover, which will not prevent the internal pressure release of the battery while protecting the explosion-proof disk;

[0016] 3. A sealing ring that fits together up and down is set between the pole and the cover plate. When the pole and the gland are sealed, the sealing ring will be connected more tightly, thereby improving the sealing of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0019] Figure 3 for Figure 1 Enlarged view of the structure at point B in the middle.

[0020] Among them, 1 cover plate, 2 explosion-proof hole, 3 pole hole, 301 retaining ring, 302 recessed groove, 4 protrusion, 5 fixed step, 6 groove, 7 explosion-proof disk, 701 film, 702 curling edge, 8 rubber ring, 9 protective cover, 10 pole, 11 upper rubber ring, 1101 raised ring, 12 lower rubber ring, 13 nut, 14 O-ring. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1-3 As shown, a high-stability battery cover structure includes a cover 1, an explosion-proof hole 2 is provided in the middle of the cover 1, and pole holes 3 are provided on both sides of the explosion-proof hole 2;

[0025] The periphery of the explosion-proof hole 2 is provided with a protrusion 4, the inner wall of the protrusion 4 is provided with an internal thread, an annular fixed step 5 is provided inside the explosion-proof hole 2, and an annular groove 6 is provided on the fixed step 5; an explosion-proof disk 7 is provided on the fixed step 5, and the middle part of the explosion-proof disk 7 is a film 701, and the outer edge of the film 701 is integrally connected with a curling edge 702, and the curling edge 702 is placed in the groove 6 and fixed by welding; a rubber ring 8 is provided in the groove 6, and the rubber ring 8 is pressed by a protective cover 9.

[0026] like Figure 1 , 3 As shown, a pole 10 is arranged in the pole hole 3, a retaining ring 301 is arranged at the top of the pole hole 3, and an upper rubber ring 11 is arranged below the retaining ring 301; the pole 10 is an inverted T-shape, a lower rubber ring 12 is sleeved on the pole 10, an end of the pole 10 exposed from the pole hole 3 is provided with an external thread, and the pole 10 is connected and fixed to the cover plate 1 by a nut 13.

[0027] like Figure 1 , 3 As shown, a recessed groove 302 is provided at the junction of the retaining ring 301 and the pole hole 3, and a raised ring 1101 is provided on the outer periphery of the top of the upper rubber ring 11. The raised ring 1101 is embedded in the recessed groove 302. When the upper rubber ring is installed on the cover plate, the upper rubber ring will not fall off, thereby improving the installation efficiency.

[0028] like Figure 1 , 3 As shown, an O-ring 14 is provided on the upper side of the inner diameter surface of the retaining ring 301, and the O-ring provides secondary sealing of the pole.

[0029] like Figure 1 , 3 As shown, the inner diameter surface of the upper rubber ring 11 is larger at the top and smaller at the bottom, and the outer diameter surface of the lower rubber ring 12 is smaller at the top and larger at the bottom. The inner diameter surface of the upper rubber ring 11 fits with the outer diameter surface of the lower rubber ring 12. When the external nut is matched with the pole, the upper rubber ring and the lower rubber ring can form a wedge-shaped match, further improving the sealing and avoiding the risk of leakage.

[0030] like Figure 1 , 2 As shown, a continuous external thread is provided at the bottom of the protective cover 9, and the protective cover 9 is connected to the explosion-proof hole 2 through the thread. The sleeve wall thickness of the protective cover 2 is greater than the diameter of the rubber ring 9 and smaller than the width of the groove. The raised inner wall above the explosion-proof hole is provided with a continuous thread to increase the connection strength between the outer wall of the protective cover and the explosion-proof hole, ensuring that when the protective cover is rotated and pressed down, the bottom of the protective cover can squeeze the rubber ring to achieve secondary sealing at the weld in the groove area; at the same time, a plurality of through holes are provided above the thread of the protective cover for pressure relief.

[0031] like Figure 1 As shown, a welding point is provided between the nut 13 and the cover plate 1. After the nut and the cover plate are fixed by the welding point, it is ensured that the nut will not rotate, and the sealing between the pole and the cover plate is further ensured to prevent leakage at the connection.

[0032] The working principle of the utility model is as follows: when in use, first place the curling edge of the explosion-proof disk in the groove and weld it, then put in the rubber ring, screw down the protective cover to press the protective cover; when installing the pole, first embed the upper rubber ring into the pole hole of the cover plate, then put the lower rubber ring into the pole, and fix the outer side of the cover plate by rotating the nut, and use the welding point to prevent the nut from rotating. The sealing of the whole structure is greatly improved, avoiding internal liquid leakage and improving safety.

[0033] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A high-stability battery cover structure, comprising a cover, characterized in that: An explosion-proof hole is provided in the middle of the cover plate, and pole holes are provided on both sides of the explosion-proof hole; The periphery of the explosion-proof hole is provided with a protrusion, the inner wall of the protrusion is provided with an internal thread, an annular fixed step is provided in the explosion-proof hole, and an annular groove is provided on the fixed step; an explosion-proof disk is provided on the fixed step, the middle part of the explosion-proof disk is a film, and the outer edge of the film is integrally connected with a curling edge, and the curling edge is placed in the groove and fixed by welding; a rubber ring is provided in the groove, and the rubber ring is pressed by a protective cover; A pole is arranged in the pole hole, a retaining ring is arranged at the top of the pole hole, and an upper rubber ring is arranged below the retaining ring; the pole is an inverted T-shape, a lower rubber ring is sleeved on the pole, an end of the pole exposed from the pole hole is provided with an external thread, and the pole is connected and fixed to the cover plate by a nut.

2. A high stability battery cover structure according to claim 1, characterized in that: A concave groove is provided at the junction of the retaining ring and the pole hole, and a convex ring is provided on the periphery of the top of the upper rubber ring, and the convex ring is embedded in the concave groove.

3. A high stability battery cover structure according to claim 1, characterized in that: An O-ring is arranged on the upper side of the inner diameter surface of the retaining ring.

4. A high stability battery cover structure according to claim 1, characterized in that: The inner diameter surface of the upper rubber ring is larger at the top and smaller at the bottom, the outer diameter surface of the lower rubber ring is smaller at the top and larger at the bottom, and the inner diameter surface of the upper rubber ring is matched with the outer diameter surface of the lower rubber ring.

5. The high stability battery cover structure according to claim 1, characterized in that: The bottom of the protective cover is provided with a continuous external thread, and the outer wall above the external thread of the protective cover is provided with a plurality of through holes; the protective cover is connected to the explosion-proof hole through the thread, and the sleeve wall thickness of the protective cover is greater than the diameter of the rubber ring and less than the width of the groove.

6. A high stability battery cover structure according to claim 1, characterized in that: A welding point is arranged between the nut and the cover plate for fixing.

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