Battery cover plate structure

Abstract

The utility model discloses a battery cover plate structure which comprises a stop frame, a base plate, a sealing ring, a pole body, a welding ring and an injection molding part, wherein the base plate is provided with a pole hole; the sealing ring is arranged in the pole hole; boss pieces are arranged on the upper surface of the stop frame, and the vertical distances between the two sets of boss pieces and the center line of the stop frame are not completely the same. The cross section of the sealing ring is of a Z-shaped structure, so that the sealing ring is embedded in the pole hole, the sealing ring is encircled to form an inner ring cavity for mounting and limiting the pole body, and an outer ring cavity is formed between the sealing ring and the inner wall of the pole hole; a cavity for pouring and forming an injection molding part is defined between the welding ring and the inner wall of the pole hole as well as between the welding ring and the pole body; a concave clamping groove is formed in the periphery of the pole body; wherein positioning holes are formed in the top and the bottom of the pole body. The utility model relates to the technical field of batteries, and solves the technical problem that the product yield is affected due to the fact that a pole body is easy to deviate or misplace during injection molding of an injection molding part.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, relates to battery cover technology, and specifically provides a battery cover structure. Background Art

[0002] At present, lithium batteries have the advantages of safety, high efficiency, pollution-free, high specific energy, abundant raw materials, many cycles and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptops, but also widely used in large and medium-sized electric equipment such as electric vehicles, electric bicycles and power tools. Therefore, the safety requirements for lithium batteries are getting higher and higher.

[0003] Currently, the manufacturing process for battery covers typically involves stamping or machining the terminal, then stamping the welding ring, and finally integrating the terminal and welding ring into a one-piece structure through injection molding. However, actual manufacturing has revealed certain drawbacks: for example, when the terminal and welding ring are integrated through injection molding, the terminal is susceptible to deviation due to the impact force generated by the injection molding process. This can prevent the terminal from docking with the connector during subsequent assembly, leading to product failure.

[0004] Therefore, a battery cover structure is needed to solve the above problems. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a battery cover structure that can lock the pole, preventing the pole from being dislocated or deviating during the injection molding process, thereby improving the product yield. The present invention provides a sealing ring with a Z-shaped cross-section, and the sealing ring forms an inner ring chamber, thereby being able to initially limit and wrap the pole body, and providing positioning holes at the top and bottom of the pole body, respectively, to achieve secondary positioning with the help of external tooling, thereby effectively ensuring that the pole body will not be dislocated during injection molding, thereby achieving the purpose of improving product yield.

[0006] To achieve the above-mentioned object, the first aspect of the present invention provides a battery cover structure, comprising a stop frame, a base plate provided with a pole hole, and a sealing ring, a pole body, a welding ring, and an injection molded part installed in the pole hole from bottom to top;

[0007] Bosses engaging with the base plate are respectively provided on both sides of the upper surface of the stop frame, and the vertical distances between the two groups of bosses and the center line of the stop frame are not exactly the same;

[0008] The cross section of the sealing ring is configured as a Z-shaped structure so as to be embedded in the pole hole, and the sealing ring is surrounded by an inner ring chamber for mounting and limiting the pole body, and an outer ring chamber is formed between the sealing ring and the inner wall of the pole hole for mounting the welding ring;

[0009] A cavity for casting the injection molded part is formed between the welding ring and the inner wall of the pole hole and between the welding ring and the pole body;

[0010] The periphery of the pole body is provided with an inwardly concave slot for being fixedly connected with the injection molded part in a snap-fit ​​manner;

[0011] Wherein, the top and bottom of the pole body are both provided with positioning holes for engaging with external tooling.

[0012] Furthermore, the sealing ring includes a flat washer, an upper convex ring and a lower convex ring;

[0013] The upper convex ring is arranged on the outer side of the upper surface of the flat washer to surround and form the outer ring cavity, and the outer ring cavity is formed between the outer wall and the inner wall of the pole hole;

[0014] The lower convex ring is arranged on the inner side of the lower surface of the flat washer, and a step groove is formed between the lower convex ring and the lower surface of the flat washer to engage with the bottom wall of the pole hole.

[0015] Furthermore, the flat washer, the upper convex ring and the lower convex ring are integrally formed.

[0016] Furthermore, the card slot is vertical, and is provided in plurality, and the plurality of card slots are arranged in a ring shape and at equal intervals.

[0017] Furthermore, the boss member is configured as a cylindrical structure.

[0018] Furthermore, the stop frame is provided with a connecting piece that fits with the pole body, and the connecting piece is provided with a through hole that matches the positioning hole.

[0019] Furthermore, a mounting hole is provided in the middle of the substrate, and an explosion-proof valve and a protective film are sequentially arranged in the mounting hole from bottom to top.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] By providing a sealing ring with a Z-shaped cross-section and forming an inner ring chamber, the pole body can be initially limited and wrapped, and positioning holes are provided at the top and bottom of the pole body respectively, so as to achieve secondary positioning with the help of external tooling, thereby effectively ensuring that the pole body will not be misaligned during injection molding, thereby achieving the purpose of improving product yield.

[0022] In addition, by providing an inwardly concave groove around the periphery of the pole body to engage with the injection molded part after limiting the position, the adhesion force between the pole body and the injection molded part is increased, thereby achieving the purpose of improving the stability of the integrated structure formed by the pole body, welding ring and injection molded part.

[0023] In addition, by providing bosses connected to the substrate on both sides of the upper surface of the stop frame, and making the vertical distances between the bosses and the center line of the stop frame not completely the same, the stop frame and the substrate can only be plugged in one way, thereby effectively avoiding the situation where the injection hole on the substrate is blocked due to the reverse installation between the stop frame and the substrate, thereby failing to complete the battery injection and affecting the installation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is an exploded view of the battery cover structure of the present invention;

[0026] Figure 2 This is a schematic structural diagram of the battery cover structure of the present utility model;

[0027] Figure 3 A partial cross-sectional view of one of the pole holes of the battery cover structure of the present invention;

[0028] Figure 4 This is a structural diagram of the pole body of the battery cover structure of the utility model;

[0029] Figure 5 It is a half-section schematic diagram of the sealing ring of the battery cover structure of the present invention.

[0030] Figure Number:

[0031] 1. Stop frame; 11. Boss part; 12. Connecting piece; 121. Through hole; 13. Explosion-proof valve; 2. Base plate; 21. Pole hole; 22. Protective film; 3. Sealing ring; 31. Flat washer; 32. Upper convex ring; 33. Lower convex ring; 4. Pole body; 41. Slot; 42. Positioning hole; 5. Welding ring; 6. Injection molded part. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] During the assembly process of the battery cover, certain technical defects were discovered: for example, the surface of the base plate 2 has a liquid injection hole, and the stop frame 1 is provided with an opening that matches the liquid injection hole. When the battery cover is assembled, the operator completes the liquid injection operation through the liquid injection hole and the opening, and then seals the liquid injection hole and the opening. However, during the assembly process, the stop frame 1 and the base plate 2 are sometimes installed reversely, resulting in the liquid injection hole being blocked. In this case, the operator needs to disassemble and reassemble the base plate 2 before the liquid injection operation can be carried out, which is time-consuming and not conducive to improving the assembly speed.

[0034] Therefore, a battery cover plate structure is proposed herein to avoid the situation where the stop frame 1 and the base plate 2 are reversely installed during the battery cover plate assembly process, as shown below.

[0035] See also Figures 1 to 5 As shown, the first embodiment of the present invention provides a battery cover structure, including a stop frame 1, a base plate 2 provided with a pole hole 21, and a sealing ring 3, a pole body 4, a welding ring 5 and an injection molded part 6 installed in the pole hole 21 from bottom to top.

[0036] The stopper frame 1 is provided with bosses 11 on both sides of its upper surface, each of which engages with the base plate 2. The two sets of bosses 11 are positioned at different vertical distances from the centerline of the stopper frame 1. By arranging the bosses 11 asymmetrically, the stopper frame 1 and base plate 2 can only be assembled in one way, effectively preventing reverse assembly. This, in turn, prevents blockage of the injection port and improves production speed.

[0037] In this embodiment, the boss member 11 is configured as a cylindrical structure.

[0038] In other embodiments, two sets of bosses 11 with different shapes may be provided to avoid the above defects, which will not be elaborated here.

[0039] The sealing ring 3 has a Z-shaped cross-section for embedding within the pole hole 21. The sealing ring 3 surrounds and forms an inner annular chamber for mounting and positioning the pole body 4. It also forms an outer annular chamber with the inner wall of the pole hole 21 for mounting the welding ring 5. The specific shape of the sealing ring 3 forms a chamber that encloses the pole body 4, thereby achieving initial positioning of the pole body 4. During injection molding, the sealing ring 3, by its enveloping force on the pole body 4, prevents the pole body 4 from deflecting or misaligning due to the impact force generated during injection molding.

[0040] In addition, the top and bottom of the pole body 4 are provided with positioning holes 42 for engaging with external tooling, that is, by providing the positioning holes 42, the pole body 4 can be cooperated with the external tooling to achieve secondary positioning of the pole body 4, further effectively preventing the pole body 4 from deviation or misalignment.

[0041] It should be noted that a cavity for casting the injection molded part 6 is formed between the welding ring 5 and the inner wall of the pole hole 21 and between the welding ring 5 and the pole body 4 . This is a prior art and will not be described in detail here.

[0042] In this embodiment, the shape of the pole body 4 is further limited to improve the stability of the connection between the pole body 4 and the injection molded part 6, thereby preventing the pole body 4 from separating from or falling off the injection molded part 6 during use.

[0043] Specifically, the periphery of the pole body 4 is provided with an inwardly concave slot 41 for fixedly connecting with the injection molded part 6 by snapping, that is, by increasing the contact area between the two and enabling mutual axial limitation, the adhesion force between the pole body 4 and the injection molded part 6 is increased, thereby improving the stability of the integrated structure formed by the pole body 4, the welding ring 5 and the injection molded part 6.

[0044] In this embodiment, the clamping slots 41 are vertical, and are provided in plurality. The plurality of clamping slots 41 are arranged in a ring shape and are equidistantly spaced, thereby further increasing the adhesion force between the pole body 4 and the injection molded part 6 .

[0045] The device is provided with a sealing ring 3 with a Z-shaped cross-section, and the sealing ring 3 forms an inner ring chamber, thereby being able to perform preliminary positioning and wrapping of the pole body 4, and providing positioning holes 42 at the top and bottom of the pole body 4, respectively, to achieve secondary positioning with the help of external tooling, thereby effectively ensuring that the pole body 4 will not be misplaced during the molding of the injection molded part 6, thereby achieving the purpose of improving the product yield.

[0046] It should also be noted that by providing positioning holes 42 at the top and bottom of the pole body 4, respectively, the supporting force provided by the external tooling to the pole body 4 can be increased. Therefore, when injection molding is performed to form the injection molded part 6, the impact force exerted on the single positioning hole 42 can be dispersed, thereby preventing the positioning hole 42 from being deformed due to excessive injection pressure.

[0047] In addition, by providing an inwardly concave slot 41 around the periphery of the pole body 4 to engage with the injection molded part 6 after injection, the adhesion force between the pole body 4 and the injection molded part 6 is increased, thereby achieving the purpose of improving the stability of the integrated structure formed by the pole body 4, the welding ring 5 and the injection molded part 6.

[0048] In addition, by providing bosses 11 connected to the substrate 2 on both sides of the upper surface of the stop frame 1, and making the vertical distances between the bosses 11 and the center line of the stop frame 1 not completely the same, the stop frame 1 and the substrate 2 can only be plugged in one way, thereby effectively avoiding the situation where the injection hole on the substrate 2 is blocked due to the reverse installation between the stop frame 1 and the substrate 2, thereby failing to complete the battery injection, thereby affecting the installation speed.

[0049] In a further embodiment, a specific sealing ring 3 is also provided to better wrap the pole body 4 and facilitate quick installation.

[0050] Specifically, the sealing ring 3 includes a flat washer 31 , an upper convex ring 32 and a lower convex ring 33 .

[0051] The upper convex ring 32 is arranged outside the upper surface of the flat washer 31 to surround and form the outer ring cavity, and the outer ring cavity is formed between the outer wall and the inner wall of the pole hole 21 .

[0052] In addition, the lower convex ring 33 is arranged on the inner side of the lower surface of the flat washer 31, and a step groove is formed between the lower surface of the flat washer 31 and the lower surface of the flat washer 31 to engage with the bottom wall of the pole hole 21. The formation of the step groove facilitates the engagement of the sealing ring 3 with the bottom wall of the pole hole 21, thereby achieving the purpose of convenient installation.

[0053] It should be noted that the flat washer 31 , the upper convex ring 32 and the lower convex ring 33 are integrally formed.

[0054] In other embodiments, the stop frame 1 is provided with a connecting piece 12 that fits with the pole body 4, and the connecting piece 12 is provided with a through hole 121 that matches the positioning hole 42, so that external tooling can pass through the through hole 121 to position the positioning hole 42, thereby ensuring that the pole body 4 will not shake due to the impact force during the molding of the injection molded part 6, ensuring the docking effect between the pole body 4 and the connecting piece 12, and achieving the purpose of improving the product yield.

[0055] The base plate 2 has a mounting hole in the middle, in which an explosion-proof valve 13 and a protective film 22 are sequentially arranged from bottom to top, wherein the explosion-proof valve 13 is welded to the base plate 2. This is prior art and will not be described in detail here.

[0056] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A battery cover structure, characterized in that: It comprises a stop frame (1), a base plate (2) provided with a pole hole (21), and a sealing ring (3), a pole body (4), a welding ring (5), and an injection molded part (6) installed in the pole hole (21) in sequence from bottom to top; Bosses (11) engaging with the base plate (2) are respectively provided on both sides of the upper surface of the stop frame (1), and the vertical distances between the two groups of bosses (11) and the center line of the stop frame (1) are not completely the same; The cross section of the sealing ring (3) is configured as a Z-shaped structure so as to be embedded in the pole hole (21), and the sealing ring (3) is surrounded to form an inner ring chamber for mounting and limiting the pole body (4), and an outer ring chamber is formed between the sealing ring (3) and the inner wall of the pole hole (21) for mounting the welding ring (5); A cavity for casting and forming the injection molded part (6) is formed between the welding ring (5) and the inner wall of the pole hole (21), and between the welding ring (5) and the pole body (4); The periphery of the pole body (4) is provided with an inwardly concave slot (41) for being fixedly connected to the injection molded part (6) in a snap-fit ​​manner; The top and bottom of the pole body (4) are both provided with positioning holes (42) for engaging with external tooling.

2. The battery cover structure according to claim 1, characterized in that: The sealing ring (3) comprises a flat washer (31), an upper convex ring (32) and a lower convex ring (33); The upper convex ring (32) is arranged outside the upper surface of the flat washer (31) to surround and form the outer ring chamber, and the outer ring chamber is formed between the outer wall and the inner wall of the pole hole (21); The lower convex ring (33) is arranged on the inner side of the lower surface of the flat washer (31), and a step groove is formed between the lower surface of the flat washer (31) and the lower surface of the flat washer (31) to engage with the bottom wall of the pole hole (21).

3. The battery cover structure according to claim 2, characterized in that: The flat washer (31), the upper convex ring (32) and the lower convex ring (33) are integrally formed.

4. The battery cover structure according to claim 1, characterized in that: The card slot (41) is vertical, and is provided in plurality, and the plurality of card slots (41) are arranged in a ring shape and at equal intervals.

5. The battery cover structure according to claim 1, characterized in that: The boss member (11) is configured as a cylindrical structure.

6. The battery cover structure according to claim 1, characterized in that: The stop frame (1) is provided with a connecting piece (12) that fits with the pole body (4), and the connecting piece (12) is provided with a through hole (121) that matches the positioning hole (42).

7. The battery cover structure according to claim 1, characterized in that: The middle portion of the base plate (2) is provided with a mounting hole, and an explosion-proof valve (13) and a protective film (22) are sequentially arranged in the mounting hole from bottom to top.

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