Liquid-inlet-preventing cover plate with overturning sheet structure

Abstract

The utility model belongs to the technical field of power batteries, and particularly discloses an anti-liquid-inlet overturning piece structure cover plate which comprises a base plate and a stop frame attached to the lower portion of the base plate. A first negative pole mounting hole and a first overturning piece mounting notch are formed in the stop frame, a negative pole is arranged in the first negative pole mounting hole, and an overturning piece is arranged in the first overturning piece mounting notch; an injection molding platform is arranged at the top of the substrate, and a negative pole mounting hole II for accommodating a negative pole and a turnover sheet mounting notch II for accommodating a turnover sheet are formed in the bottom of the injection molding platform. According to the anti-liquid-inlet overturning sheet structure cover plate provided by the utility model, the injection molding platform is arranged on the substrate, and the gap is completely filled and wrapped through injection molding, so that the risk of short circuit caused by partial liquid inlet is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and in particular relates to a cover plate with a liquid-intrusion-proof flip-up sheet structure. Background Art

[0002] With the continuous expansion of the new energy battery market and the continuous advancement of new energy battery technology, the new energy battery industry will usher in broader development prospects.

[0003] In the structural composition of new energy batteries, new energy battery covers are usually used to wrap and protect the battery shell, which can ensure that the internal structure of the battery is not affected by the external environment and collisions. It is an important component of new energy batteries.

[0004] The cover of a new energy battery is primarily composed of a base plate, positive and negative poles, a liquid injection port, a flip plate, and an explosion-proof valve. The base plate also features an insulating plate. When the internal pressure of the battery reaches the SSD flip pressure, the flip plate pushes upward, quickly shutting off the current. After the cover is riveted, a gap exists between the insulating plate and the base plate, creating a risk of liquid entering the flip plate and causing a short circuit in the battery cells. Existing designs address this issue by providing a boss on the base plate. However, the gap between the insulating plate and the base plate remains, posing a risk of liquid ingress into the flip plate structure. Utility Model Content

[0005] The purpose of the present invention is to overcome the above problems existing in the prior art and provide a cover plate with a liquid-proof flip-up plate structure. An injection molding platform is opened on the substrate, and the gap is completely filled and wrapped by injection molding, thereby solving the risk of short circuit caused by partial liquid ingress.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A cover plate with a liquid-proof flip-up sheet structure, comprising a base plate and a stop frame attached to the bottom of the base plate;

[0008] The stop frame is provided with a negative electrode post mounting hole 1 and a flip plate mounting notch 1, wherein the negative electrode post is mounted in the negative electrode post mounting hole 1, and the flip plate is mounted in the flip plate mounting notch 1;

[0009] An injection molding platform is provided on the top of the substrate, and a second negative electrode post mounting hole for accommodating a negative electrode post and a second flip plate mounting notch for accommodating a flip plate are provided on the bottom of the injection molding platform;

[0010] An insulating plate is provided in the injection molding platform, an aluminum pressing plate is attached to the insulating plate, an injection molding gap is formed between the insulating plate and the injection molding platform, and an injection molded part is provided in the injection molding gap;

[0011] The insulating plate and the aluminum pressing plate are both provided with a third mounting hole that matches the shape and size of the top of the negative pole. The insulating plate is also provided with a third flip plate mounting notch that is connected to the second flip plate mounting notch.

[0012] Furthermore, a sealing ring is provided on the portion of the outer portion of the negative electrode post located within the first negative electrode post mounting hole;

[0013] The negative electrode column and the stop frame are sealed by a sealing ring.

[0014] Furthermore, the injection molded part is formed outside the insulating plate and the aluminum pressing plate by injection molding, and fills the injection molding gap.

[0015] Furthermore, the outer portion of the aluminum pressure plate is in contact with the inner surface of the injection molded part.

[0016] Furthermore, the edge of the top surface of the aluminum pressing plate is provided with a multi-step structure;

[0017] The injection molded part is sleeved on the outside of the multi-step structure.

[0018] Furthermore, a pole circular groove is provided at one end of the top surface of the aluminum pressure plate where the mounting hole three is provided. The pole circular groove is communicated with the mounting hole three, and the inner diameter of the pole circular groove is larger than the inner diameter of the mounting hole three.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model provides a cover plate with a liquid-proof flip-up plate structure. An injection molding platform is provided on the base plate, and the gap is completely filled and wrapped by injection molding, thereby solving the risk of short circuit caused by partial liquid ingress.

[0021] 2. In the present invention, since the injection molded part is formed on the outside of the insulating plate and the aluminum pressure plate by injection molding, this one-piece molding design covers the injection molded part on the outside of the insulating plate and the aluminum pressure plate, thereby improving the strength of the cover terminal structure.

[0022] 3. In the present invention, since a multi-step structure is provided on the edge of the top surface of the aluminum pressure plate, the injection-molded part is sheathed on the outside of the multi-step structure, thereby enhancing the stability of the combination between the injection-molded part and the aluminum pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a structural explosion diagram of the utility model;

[0026] Figure 3 This is a schematic diagram of the installation structure of the sealing ring and the negative electrode column of the utility model;

[0027] Figure 4 This is an exploded view of the installation structure of the aluminum pressure plate and the base plate of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the aluminum pressing plate of the present utility model.

[0029] Among them, the accompanying drawings are marked as follows: 1. aluminum pressure plate; 2. injection molded part; 3. insulating plate; 4. substrate; 5. flip plate; 6. sealing ring; 7. negative pole; 8. stop frame; 81. negative pole mounting hole one; 82. flip plate mounting notch one; 40. injection molding platform; 401. negative pole mounting hole two; 402. flip plate mounting notch two; 30. injection molding gap; 101. step structure; 301. flip plate mounting notch three; 10. pole circular groove. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] like Figures 1 to 5 As shown, a liquid-proof flip-up sheet structure cover comprises a base plate 4 and a stop frame 8 attached to the bottom of the base plate 4;

[0033] The stop frame 8 is provided with a negative electrode post mounting hole 81 and a flip plate mounting notch 82. The negative electrode post mounting hole 81 is provided with a negative electrode post 7, and the flip plate mounting notch 82 is provided with a flip plate 5.

[0034] An injection molding platform 40 is provided at the top of the substrate 4, and a negative pole mounting hole 2 401 for accommodating the negative pole 7 and a flip plate mounting notch 2 402 for accommodating the flip plate 5 are provided at the bottom of the injection molding platform 40. More specifically, the negative pole mounting hole 2 401 is connected to the negative pole mounting hole 1 81, and the flip plate mounting notch 2 402 is connected to the flip plate mounting notch 1 82.

[0035] Among them, such as Figure 3 As shown, a sealing ring 6 is sleeved on the outside of the negative electrode post 7; the negative electrode post 7 and the stop frame 8 are sealed by the sealing ring 6;

[0036] An insulating plate 3 is provided in the injection molding platform 40, and an aluminum pressing plate 1 is attached to the insulating plate 3. An injection molding gap 30 is formed between the insulating plate 3 and the injection molding platform 40. An injection molding part 2 is provided in the injection molding gap 30. The injection molding part 2 is formed on the outside of the insulating plate 3 and the aluminum pressing plate 1 by injection molding and fills the injection molding gap 30. In addition, the outside of the aluminum pressing plate 1 is attached to the inner surface of the injection molding part 2. Specifically, a multi-step structure 101 is provided on the edge of the top surface of the aluminum pressing plate 1. The injection molding part 2 is fitted on the outside of the multi-step structure 101, thereby wrapping the aluminum pressing plate 1. This design completely fills the gap between the insulating plate 3 and the base plate 4, thereby effectively preventing liquid from entering.

[0037] Since the injection molded part 2 is formed on the outside of the insulating plate 3 and the aluminum pressing plate 1 by injection molding, this one-piece molding design covers the injection molded part 2 on the outside of the insulating plate 3 and the aluminum pressing plate 1, thereby improving the strength of the cover terminal structure;

[0038] The insulating plate 3 and the aluminum pressing plate 1 are both provided with a mounting hole three that matches the shape and size of the top of the negative electrode post 7. A pole circular groove 10 is provided on the top surface of the aluminum pressing plate 1 at one end of the mounting hole three. The pole circular groove 10 is connected to the mounting hole three on the aluminum pressing plate 1. The inner diameter of the pole circular groove 10 is larger than the inner diameter of the mounting hole three.

[0039] The insulating plate 3 is further provided with a third flip plate installation notch 301 communicating with the second flip plate installation notch 402 . The third flip plate installation notch 301 is communicated with the second flip plate installation notch 402 and can be used to flip and lift the flip plate 5 in abnormal situations.

[0040] In the present invention, an injection molding platform 40 is provided on the substrate 4 for placing the insulating plate 3, and an injection molding gap 30 is formed between the insulating plate 3 and the injection molding platform 40. The injection molding gap 30 is filled with the injection molded part 2, thereby solving the risk of liquid entering the flip plate and causing short circuit of the battery cell.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A cover plate with a liquid-proof flip-up plate structure, characterized in that: It comprises a base plate (4) and a stop frame (8) attached to the bottom of the base plate (4); The stop frame (8) is provided with a negative pole column mounting hole (81) and a flip plate mounting notch (82); a negative pole column (7) is provided in the negative pole column mounting hole (81), and a flip plate (5) is provided in the flip plate mounting notch (82); An injection molding platform (40) is provided on the top of the substrate (4), and a second negative pole mounting hole (401) for accommodating a negative pole (7) and a second flip plate mounting notch (402) for accommodating a flip plate (5) are provided on the bottom of the injection molding platform (40); An insulating plate (3) is provided in the injection molding platform (40), an aluminum pressing plate (1) is attached to the insulating plate (3), an injection molding gap (30) is formed between the insulating plate (3) and the injection molding platform (40), and an injection molded part (2) is provided in the injection molding gap (30); The insulating plate (3) and the aluminum pressing plate (1) are both provided with a third mounting hole that matches the shape and size of the top of the negative pole (7). The insulating plate (3) is also provided with a third flip plate mounting notch (301) that is connected to the second flip plate mounting notch (402).

2. The cover plate with a liquid-proof flip-up sheet structure according to claim 1, characterized in that: The portion of the outer portion of the negative electrode post (7) located within the negative electrode post mounting hole 1 (81) is sheathed with a sealing ring (6); The negative pole (7) and the stop frame (8) are sealed via a sealing ring (6).

3. The cover plate with a liquid-proof flip-up sheet structure according to claim 1, characterized in that: The injection molded part (2) is formed outside the insulating plate (3) and the aluminum pressing plate (1) by injection molding, and fills the injection molding gap (30).

4. The cover plate with a liquid-proof flip-up sheet structure according to claim 1, characterized in that: The exterior of the aluminum pressing plate (1) is in contact with the interior surface of the injection molded part (2).

5. The cover plate with a liquid-proof flip-up sheet structure according to claim 1, characterized in that: The edge of the top surface of the aluminum pressing plate (1) is provided with a multi-step structure (101); The injection molded part (2) is sleeved on the outside of the multi-step structure (101).

6. The cover plate with a liquid-proof flip-up sheet structure according to claim 1, characterized in that: The top surface of the aluminum pressure plate (1) is provided with a pole circular groove (10) at one end of the mounting hole three, the pole circular groove (10) is communicated with the mounting hole three, and the inner diameter of the pole circular groove (10) is larger than the inner diameter of the mounting hole three.

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