Double-color injection molding cover plate with pole columns assembled on front face

Abstract

The utility model discloses a double-shot molding cover plate with a front assembled pole, which belongs to the technical field of lithium battery cover plates and comprises a battery cover plate body. An electrode column is arranged on the battery cover plate body, and the battery cover plate is characterized in that the electrode column is fixedly connected with the battery cover plate body through a plastic pouring body, and the electrode column is clamped and sealed with the battery cover plate body through a sealing ring; the plastic pouring body which is integrally formed by pouring is fixedly connected with the upper end surface of the battery cover plate body through the inverted buckle hole and is fixedly connected with the electrode column through the annular groove; the utility model has the beneficial effects that a pole flange used for fixing at the bottom of the pole is omitted, so that the processing difficulty and the production cost are reduced on the premise of ensuring the structural stability; the preset number of inverted buckle holes are formed in the form of the annular matrix, and a plurality of anchor points are formed through the plastic pouring body which is integrally formed by pouring, so that the binding force with the battery cover plate body is greatly increased.

Description

Technical fields:

[0001] This utility model belongs to the field of lithium battery cover technology, and more specifically relates to a two-color injection molded cover for front-mounted terminal posts. Background technology:

[0002] As an important component of lithium batteries, the battery cover plays a crucial role in sealing and safety. Currently, the electrode posts on the battery cover are generally fixed to the battery cover by injection molding and then snapped onto the lower plastic plate. During the assembly process, an additional sealing ring is required to ensure the seal between the electrode posts and the battery cover. This method is cumbersome to assemble and the seal may weaken over time.

[0003] The lithium battery cover developed by our company adopts an in-mold injection molding structure, and the explosion-proof valve and the cover are connected by laser welding. After welding, the airtightness of the explosion-proof valve and the cover must be guaranteed to have a helium leak detection rate of no more than 1*10. -7 Pa.m 3 / s, the burst value can rupture and exhaust gas in time under a gas pressure of 0.8±0.2MPa, and after 10 cycles of breathing test by continuously applying a gas pressure of 0.15MPa from the inside to the outside and from the outside to the inside, the burst value can rupture and exhaust gas in time under a gas pressure of 0.8±0.2MPa.

[0004] During injection molding, such battery terminals are first installed in the injection mold, and then assembled sequentially from bottom to top: terminal, sealing ring, lower plastic, and cover plate. This assembly is then injection molded as a whole. The terminal flange area is relatively large, resulting in high production costs. To accommodate the flange at the bottom of the terminal, a large countersunk hole needs to be machined at the terminal assembly location on the cover plate, placing high demands on the cover plate mold and increasing mold processing costs. Furthermore, the production process of the stamped cover plate requires a high tonnage press; generally, a press tonnage greater than 400 tons is needed to meet production requirements. Utility Model Content:

[0005] To solve the above problems and overcome the shortcomings of the prior art, this utility model provides a two-color injection molded cover plate for front-mounted pole posts;

[0006] The first technical problem to be solved is that the battery terminals are first installed in the injection mold during injection molding, and the terminals, sealing rings, lower plastic and cover plates are assembled from bottom to top, and then the whole thing is injected. The terminal flange area is large, resulting in high production costs.

[0007] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: the dual-color injection molded cover plate for front-mounted electrode posts includes a battery cover plate body; an electrode post is provided on the battery cover plate body, characterized in that: the electrode post is fixedly connected to the battery cover plate body through a plastic casting body, and the electrode post is locked and sealed to the battery cover plate body through a sealing ring.

[0008] The upper surface of the battery cover plate body is provided with a preset number of undercut holes in the form of an annular matrix, the side wall of the electrode post is provided with an annular groove, and a sealing boss is provided below the annular groove.

[0009] The integrally cast plastic casting body is fixedly connected to the upper end face of the battery cover plate body through the undercut hole, and fixedly connected to the electrode post through the annular groove.

[0010] The electrode post passes through the battery cover body, and the sealing boss is sealed to the battery cover body by a sealing ring.

[0011] Furthermore, an explosion-proof valve assembly is provided on the battery cover body.

[0012] Furthermore, the electrode post includes a positive electrode post and a negative electrode post.

[0013] Furthermore, a lower plastic plate is also provided at the bottom of the battery cover body.

[0014] Furthermore, the electrode post passes through the lower plastic plate.

[0015] The beneficial effects of this utility model are:

[0016] One advantage of this utility model is that it provides an integrally cast plastic casting body that is fixedly connected to the upper end face of the battery cover plate body through an undercut hole and fixedly connected to the electrode post through an annular groove, eliminating the electrode post flange at the bottom of the electrode post for fixing, thus reducing the processing difficulty and production cost while ensuring structural stability.

[0017] One advantage of this invention is that the upper surface of the battery cover body is provided with a preset number of undercut holes in the form of a ring matrix, and multiple anchor points are formed by the integrally cast plastic casting body, which greatly increases the bonding force with the battery cover body. Attached image description:

[0018] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Appendix Figure 2 This is an exploded structural diagram of the present invention; in the attached diagram:

[0020] 1. Battery cover body; 2. Explosion-proof valve assembly; 3. Electrode post; 4. Plastic casting body; 5. Sealing ring; 6. Inverted hole; 7. Annular groove; 8. Sealing boss; 9. Lower plastic plate. Detailed implementation method:

[0021] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] The specific embodiment of this utility model is as follows: the two-color injection molded cover plate for front-mounted electrode posts includes a battery cover plate body 1; the battery cover plate body 1 is provided with an explosion-proof valve assembly 2 and an electrode post 3, characterized in that: the electrode post 3 is fixedly connected to the battery cover plate body 1 through a plastic casting body 4, and the electrode post 3 is locked and sealed to the battery cover plate body 1 through a sealing ring 5.

[0023] The upper surface of the battery cover body 1 has a predetermined number of inverted holes 6 in a ring matrix, the side wall of the electrode post 3 has an annular groove 7, and a sealing boss 8 is provided below the annular groove 7.

[0024] The integrally cast plastic casting body 4 is fixedly connected to the upper end face of the battery cover plate body 1 through the inverted hole 6, and fixedly connected to the electrode post 3 through the annular groove 7.

[0025] The electrode post 3 passes through the battery cover body 1, and the sealing boss 8 is engaged and sealed with the battery cover body 1 by the sealing ring 5.

[0026] Furthermore, the electrode post 3 includes a positive electrode post and a negative electrode post.

[0027] Furthermore, a lower plastic plate 9 is also provided at the bottom of the battery cover body 1.

[0028] Furthermore, the electrode post 3 passes through the lower plastic plate 9.

[0029] It should be noted that this utility model is a two-color injection molded cover plate for front-mounted pole posts. In specific operation...

[0030] 1. The two-color injection molded cover is installed on the front. The positive electrode post or negative electrode post and the sealing ring 5 are placed in the countersunk hole of the battery cover body 1. The electrode post 3 is sealed by the sealing ring 5 and the countersunk hole of the battery cover body 1, and the electrode post 3 passes through the lower plastic plate 9.

[0031] 2. The plastic casting body 4 is cast in one piece. Since the upper end face of the battery cover plate body 1 has a preset number of undercut holes 6 in the form of a ring matrix, the plastic casting body 4 forms a uniformly distributed undercut structure after casting. This undercut structure forms a uniformly stressed anchor point, which greatly increases the force between the plastic casting body 4 and the battery cover plate body 1 and improves the stability of the device.

[0032] 3. Based on the inverted structure, the electrode post 3 is locked and sealed to the battery cover body 1 by the plastic casting body 4 and the sealing ring 5. This is a front-mounted installation, which eliminates the need for the traditional electrode post flange for fixing at the bottom of the electrode post. The position of the electrode post for assembling the cover plate requires machining a large countersunk hole, which places higher demands on the cover plate mold and results in higher mold processing costs.

[0033] 4. The lower plastic plate 9 and the plastic casting body 4 can be connected by adhesive bonding. As a preferred embodiment of this utility model, the plastic casting body 4 can also adopt an inverted structure. The lower plastic plate 9 and the lower end face of the battery cover plate body 1 are connected by inverted holes and ultrasonic welding.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double-color injection-molded cover plate with front-mounted pole posts, comprising a battery cover plate body (1); a pole post (3) is arranged on the battery cover plate body (1), characterized in that: The electrode post (3) is fixedly connected to the battery cover body (1) through a plastic casting body (4), and the electrode post (3) is locked and sealed to the battery cover body (1) through a sealing ring (5); The upper end face of the battery cover body (1) is provided with a preset number of buckle holes (6) in the form of an annular matrix, and the side wall of the electrode post (3) is provided with an annular groove (7), and a sealing boss (8) is provided below the annular groove (7). The integrally cast plastic casting body (4) is fixedly connected to the upper end face of the battery cover body (1) through the undercut hole (6), and fixedly connected to the electrode post (3) through the annular groove (7). The electrode post (3) passes through the battery cover body (1), and the sealing boss (8) is engaged and sealed with the battery cover body (1) through the sealing ring (5).

2. The dual color injection molded cover plate with front assembled pole post of claim 1, wherein An explosion-proof valve assembly (2) is also provided on the battery cover body (1).

3. The dual color injection molded cover plate with front assembled pole stub of claim 1, wherein The electrode post (3) includes a positive electrode post and a negative electrode post.

4. The two-color injection molded cover plate for the front-mounted pole post according to claim 1, characterized in that... The bottom of the battery cover body (1) is also provided with a lower plastic plate (9).

5. The two-color injection molded cover plate for the front-mounted pole post according to claim 4, characterized in that... The electrode post (3) passes through the lower plastic plate (9).

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