Battery pack sealing cover structure

Abstract

The utility model relates to a battery pack sealing cover structure which comprises a cover plate body for sealing a top opening of a battery outer box, the upper surface of the cover plate body is provided with a boss corresponding to an electrode slice of a battery cell, an electrode column is longitudinally arranged on the boss in a penetrating manner, and the upper end of the electrode column is provided with an extending part extending out of the cover plate body. The extension part is coaxially and detachably connected with a connecting conductive cap, the side wall of the connecting conductive cap is provided with a horizontal first extension part, the upper surface of the first extension part is provided with a fixing screw hole, and when the assembly is in place, the first extension part is attached to the upper surface of the boss; according to the utility model, the whole structure is simple and compact, the connecting conductive cap is detachably connected with the electrode column, and the first extension part of the connecting conductive cap is further provided with the fixing screw hole for installation and connection, so that the situation that a bolt is directly installed on the electrode column during installation is avoided; the situation that the electrode column is damaged due to the fact that the assembling torque of the bolt is too large is avoided, and replacement is convenient through the detachable connecting conductive cap.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack sealing structure. Background Technology

[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes to generate an electric current. It is a cup, tank, or other container or composite container. It has positive and negative electrodes. Generally, a battery includes a casing and a battery cell encapsulated within the casing. The casing includes a housing and a sealing cap that fits over the housing. The battery terminals are connected to the sealing cap through holes in the sealing cap.

[0003] Existing external battery connection methods, such as connecting multiple batteries in series or parallel to form a battery pack, can use the following approach to connect multiple batteries together: threaded holes are provided on the end faces of the battery terminals, and connecting plates are also provided, with fasteners such as bolts passing through the connecting plates and being screwed into the threaded holes to fix the connecting plates to the threaded holes of each battery. Thread tightening typically requires a certain torque to ensure the contact resistance and connection strength.

[0004] However, due to the limited connection strength between the pole and the sealing cap, the pole often rotates during thread tightening, or the torque is too large, causing the pole to crack and become unusable. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a battery pack cover structure that can effectively solve the aforementioned problems.

[0006] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0007] A battery pack cover structure is provided, including a cover plate body that seals the top opening of the battery outer casing. The upper surface of the cover plate body is provided with a boss corresponding to the electrode plate of the battery cell. An electrode post is longitudinally provided through the boss. The upper end of the electrode post is provided with an extension that extends out of the cover plate body. A connecting conductive cap is coaxially and detachably connected to the extension. A horizontal first extension is provided on the side wall of the connecting conductive cap. A fixing screw hole is provided on the upper surface of the first extension. When assembled, the first extension fits against the upper surface of the boss.

[0008] In the battery pack cover structure of this utility model, the connecting conductive cap is threadedly connected to the protruding part, and when assembled in place, the top end of the protruding part abuts against the inner wall of the connecting conductive cap.

[0009] The battery pack cover structure of this utility model includes an insulating cap sleeved on the outside of the conductive cap, and the insulating cap having a second extension covering the outside of the first extension. The upper surface of the second extension has a through hole corresponding to the fixing screw hole.

[0010] In the battery pack cover structure of this utility model, the first extension is provided with a fusible part at one end near the connecting conductive cap.

[0011] In the battery pack cover structure of this utility model, the upper and lower surfaces of the first extension near the end of the connecting conductive cap are provided with elongated grooves, the two grooves are parallel to each other, and the portion of the first extension located between the two grooves forms the fusible portion.

[0012] In the battery pack cover structure of this utility model, a settling portion is provided on the inner sidewall of the insulating cap corresponding to the groove on the upper surface of the first extension portion, and a fusion space is provided between the lower end of the settling portion and the bottom surface of the adjacent groove.

[0013] The battery pack cover structure of this utility model has a protrusion at the bottom of the first extension and a positioning groove adapted to the protrusion on the upper surface of the protrusion.

[0014] The battery pack cover structure of this utility model includes a soft rubber insulating pad between the upper surface of the boss and the connecting conductive cap. The soft rubber insulating pad has a clearance hole for the electrode post to pass through. When assembled, the connecting conductive cap presses the soft rubber insulating pad against the upper surface of the boss.

[0015] The beneficial effects of this utility model are as follows: The overall structure of this utility model is simple and compact. The conductive cap and the electrode post are detachably connected. Furthermore, a fixing screw hole for installation is provided on the first extension of the conductive cap. This avoids directly installing the bolt on the electrode post during installation, and avoids damage to the electrode post and self-rotation caused by excessive bolt assembly torque. The detachable conductive cap also facilitates replacement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a longitudinal sectional view of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged view of a local structure. Detailed Implementation

[0019] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0022] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The preferred embodiment of the battery pack cover structure of this utility model, such as Figure 1-2As shown, the sealing structure includes a cover body 10 that seals the opening 101 at the top of the battery outer casing 100. The upper surface of the cover body 10 is provided with a boss 20 corresponding to the electrode sheet 201 of the battery cell 200. An electrode post 30 is longitudinally provided on the boss 20. Specifically, the lower end of the electrode post 30 is connected to the electrode sheet 201. The lower end of the electrode post 30 is fitted into the positioning groove 300 on the lower surface of the cover body 10 and is sealed with the cover body 10 by a sealing gasket 400 to prevent electrolyte leakage. The upper end of the electrode post 30 is provided with an extension 31 extending out of the cover plate body 10. A connecting conductive cap 40 is detachably connected to the extension 31 coaxially. The side wall of the connecting conductive cap 40 is provided with a horizontal first extension 41. The upper surface of the first extension 41 is provided with a fixing screw hole 410. When assembled, the first extension 41 fits against the upper surface of the boss 20. The overall structure of this cover is simple and compact. It is detachably connected to the electrode post 30 through the connecting conductive cap 40. Furthermore, the first extension 41 of the connecting conductive cap 40 is provided with a fixing screw hole 410 for installation and connection. This avoids the direct installation of bolts on the electrode post 30 during installation, and avoids the electrode post 30 being damaged or rotating due to excessive bolt assembly torque. The detachable connecting conductive cap 40 also facilitates replacement.

[0025] In this embodiment, the conductive cap 40 is threadedly connected to the protrusion 31. When assembled, the top end of the protrusion 31 abuts against the inner wall of the conductive cap 40, which facilitates subsequent maintenance, disassembly, and installation. Moreover, the threaded connection allows the electrode post 30 to be pulled upwards and tightened, achieving a more compact installation with the lower surface of the cover plate body 10.

[0026] In this embodiment, an insulating cap 50 is fitted around the outer side of the conductive cap 40. The insulating cap 50 has a second extension 51 covering the outer side of the first extension 41. The upper surface of the second extension 51 has a through hole 510 corresponding to the fixing screw hole 410. The insulating cap 50 can prevent leakage or short circuit caused by contact with other objects in the installation environment. The through hole 510 provides sufficient conductive contact area for the copper busbar connection. To ensure good contact performance, the top edge of the through hole 510 is flush with the upper surface of the first extension 41. Furthermore, when assembled, the lower end of the insulating cap 50 is flush with and abuts against the upper surface of the boss 20 to achieve a sealing effect.

[0027] In this embodiment, the first extension 41 is provided with a fuse part 411 near the end of the conductive cap 40. Specifically, the upper and lower surfaces of the first extension 41 near the end of the conductive cap 40 are provided with elongated grooves 412. The two grooves 412 are parallel to each other. The fuse part 411 is formed at the part of the first extension 41 located between the two grooves 412. The fuse part 411 formed by reducing the cross surface between the two grooves 412 can play the role of preventing overload.

[0028] In this embodiment, a settling portion 52 is provided on the inner sidewall of the insulating cap 50 corresponding to the groove 412 on the upper surface of the first extension 41. The settling portion 52 can assist in positioning the insulating cap 50. There is a melting space between the lower end of the settling portion 52 and the bottom surface of the adjacent groove 412, so as to provide the necessary melting space for the melting portion 411 and avoid adhesion after melting.

[0029] In this embodiment, the bottom of the first extension 41 is provided with a protrusion 413, and the upper surface of the boss 20 is provided with a positioning groove 21 that matches the protrusion 413, so as to play a positioning role and prevent the first extension 41 from moving when the knob is tightened.

[0030] In this embodiment, a soft rubber insulating pad 70 is provided between the upper surface of the boss 20 and the connecting conductive cap 40. The soft rubber insulating pad 70 is provided with a clearance hole 71 for the electrode post 30 to pass through. When assembled, the connecting conductive cap 40 presses the soft rubber insulating pad 70 against the upper surface of the boss 20. The soft rubber insulating pad 70 can ensure the insulation and isolation between the electrode post 30 and the upper surface of the cover plate body 10, so as to ensure the safety after installation.

[0031] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A battery pack cover structure characterized by comprising: The application relates to a cover plate body for sealing the top opening of a battery outer box, wherein the upper surface of the cover plate body is provided with a boss corresponding to the electrode sheet of an electric core, a longitudinal electrode column is arranged on the boss, the upper end of the electrode column is provided with an extension part extending out of the cover plate body, a connecting conductive cap is coaxially and detachably connected to the extension part, a horizontal first extension part is arranged on the side wall of the connecting conductive cap, a fixing screw hole is arranged on the upper surface of the first extension part, and the first extension part is attached to the upper surface of the boss when assembled.

2. The battery pack cover structure according to claim 1, wherein The connecting conductive cap is threadedly connected with the extension part, and the top end of the extension part is tightly abutted against the inner wall of the connecting conductive cap when assembled.

3. The battery pack cover structure according to claim 2, wherein An insulating cap is sleeved on the outer side of the connecting conductive cap, the insulating cap is provided with a second extension part covering the outer side of the first extension part, and a through hole is arranged on the upper surface of the second extension part corresponding to the fixing screw hole.

4. The battery pack cover structure according to claim 3, wherein The first extension part is provided with a melting part at one end close to the connecting conductive cap.

5. The battery pack cover structure according to claim 4, wherein The upper and lower surfaces of the one end of the first extension part close to the connecting conductive cap are both provided with long strip-shaped grooves, the two grooves are parallel to each other, and the melting part is formed at the position between the two grooves.

6. The battery pack cover structure according to claim 5, wherein The inner side wall of the insulating cap is provided with a sunken part corresponding to the grooves on the upper surface of the first extension part, and the melting space is formed between the lower end of the sunken part and the bottom surface of the groove adjacent to the sunken part.

7. The battery pack cover structure according to claim 1, wherein The bottom of the first extension part is provided with a protruding part, and the upper surface of the boss is provided with a positioning groove matched with the protruding part.

8. The battery pack cover structure according to claim 1, wherein A soft glue insulating pad is arranged between the upper surface of the boss and the connecting conductive cap, the soft glue insulating pad is provided with an avoiding hole for the electrode column to pass through, and the soft glue insulating pad is tightly abutted against the upper surface of the boss by the connecting conductive cap when assembled.

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