CN216793833U - Battery Covers and Battery Packs - Google Patents

Abstract

The utility model discloses a battery cover plate and a battery pack, wherein the battery cover plate comprises: the aluminum polishing sheet is provided with a liquid injection hole; the sealing element comprises a screwing part and a sealing part, the sealing part is connected with the end part of the screwing part, the screwing part extends into the liquid injection hole to be in threaded fit with the liquid injection hole, and the sealing part is suitable for abutting against the periphery of the liquid injection hole; the sealing part is provided with an injection hole which is communicated to the surface of the aluminum flake. According to the battery cover plate, the screwing part and the sealing part of the sealing element are constructed into an integrated structure, so that only one structural part is required to be injected for connecting and sealing the sealing element at the liquid injection hole, the number of structures is reduced, the design cost is reduced, the connection mode of the sealing element and the polished aluminum sheet is simple, repeated disassembly is facilitated, the follow-up repair and secondary liquid injection of a battery cell are facilitated, and the mounting stability of the sealing element on the polished aluminum sheet is good.

Description

Battery Covers and Battery Packs

technical field

The utility model relates to the technical field of battery manufacturing, in particular to a battery cover plate and a battery pack having the battery cover plate.

Background technique

The battery cover is used to block and seal the top of the battery pack, and the battery cover mostly includes a light aluminum sheet, a pole, an upper plastic, a lower plastic, an explosion-proof valve, a sealing plastic nail, and a sealing aluminum sheet. In the related art, the cover plate pre-seals the liquid injection port of the battery cover plate by sealing plastic nails, and then the sealing aluminum sheet is placed above the liquid injection port, and the liquid injection port is completely sealed by laser welding to prevent leakage of electrolyte. However, this sealing method makes the sealing aluminum sheet and the sealing plastic nails non-removable to install on the bare aluminum sheet, especially when disassembling, it is necessary to destroy the fixed structure of the sealing aluminum sheet before the sealing plastic nails can be removed. Rework, re-injection, etc. are difficult to operate, and sealing the position of the injection port requires two structural parts: sealing nails and sealing aluminum sheets to complete the sealing operation, which is relatively complicated and there is room for improvement.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a battery cover plate, the sealing member of the battery cover plate includes an integrally formed screwing part and a sealing part, which can realize screwing and sealing with the light aluminum sheet, and has a simple structure. It is easy to disassemble and assemble, the number of structural parts is small, and the practicability is strong.

The battery cover plate according to the embodiment of the present invention includes: a smooth aluminum sheet, wherein the smooth aluminum sheet is provided with a liquid injection hole; The ends of the threaded portion are connected, the threaded portion extends into the liquid injection hole to be threadedly matched with the liquid injection hole, and the sealing portion is suitable for pressing against the periphery of the liquid injection hole; The sealing portion is provided with a glue injection hole, and the glue injection hole penetrates to the surface of the light aluminum sheet.

According to the battery cover plate of the embodiment of the present invention, the screw part and the sealing part of the sealing part are formed into an integral molding structure, so that only one structural part needs to be injected for the connection and sealing of the sealing part at the injection hole, and the structure is reduced. It reduces the design cost, and the connection between the seal and the bare aluminum sheet is simple, which facilitates repeated disassembly, facilitates subsequent cell repair and re-filling, and the sealing member has better installation stability on the bare aluminum sheet.

According to the battery cover according to some embodiments of the present invention, there are a plurality of the glue injection holes, and the plurality of glue injection holes are arranged around the screw connection portion.

According to the battery cover according to some embodiments of the present invention, the glue injection holes are distributed in groups, and each group includes two glue injection holes, and the two glue injection holes of each group are located in the screw joints The radial sides of the are distributed in the opposite direction.

According to the battery cover plate of some embodiments of the present invention, the surface of the light aluminum sheet is provided with a glue sinking groove which is directly opposite to the glue injection hole.

According to the battery cover plate of some embodiments of the present invention, the bare aluminum sheet has an installation sink, the liquid injection hole is located at the bottom of the installation sink, and the screw portion is suitable for being installed from the installation sink into the liquid injection hole, and the sealing portion is located in the installation sink.

According to some embodiments of the present invention, the battery cover plate further includes an elastic pre-tensioning portion, the elastic pre-tensioning portion is located at the connection between the screw connection portion and the sealing portion, and is suitable for elastically pressing against the mounting portion. Bottom wall of the sink.

According to the battery cover plate according to some embodiments of the present invention, the elastic pre-tensioning portion is configured in a ring shape, the elastic pre-tensioning portion is sleeved outside the screwing portion, and the elastic pre-tensioning portion is pressed against the Install the area of the sink surrounding the injection hole.

According to the battery cover plate according to some embodiments of the present invention, the elastic pre-tensioning portion protrudes from the surface of the sealing portion to fit with the bottom wall of the mounting sink.

According to the battery cover plate according to some embodiments of the present invention, the screw connection portion, the sealing portion and the elastic preloading portion are integrally formed by injection molding.

The utility model also provides a battery pack.

The battery pack according to the embodiment of the present invention is provided with the battery cover plate described in any one of the above embodiments.

The battery pack and the above-mentioned battery cover have the same advantages over the prior art, which will not be repeated here.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a top view of a seal according to an embodiment of the present invention;

Figure 2 is a cross-sectional view at A-A in Figure 1;

3 is a side view of a seal according to an embodiment of the present invention;

4 is a schematic structural diagram of a battery cover plate according to an embodiment of the present invention;

Figure 5 is a cross-sectional view at B-B in Figure 4;

FIG. 6 is an enlarged view of C in FIG. 5 .

Reference number:

battery cover 100,

Seal 1, screw part 11, sealing part 12, elastic preload part 13, glue injection hole 14,

Light aluminum sheet 2, liquid injection hole 21, installation sink 22, glue sink 23, positive pole 3, negative pole 4, explosion-proof valve protection sheet 5, lower plastic 6.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

The following describes the battery cover plate 100 according to the embodiment of the present invention with reference to FIGS. 1 to 6 . The screw connection portion 11 and the sealing portion 12 of the sealing member 1 of the battery cover plate 100 are integrally formed, so that the connection and sealing only need to be Injection of a structural part reduces the number of structures and design costs, and the connection between the sealing part 1 and the light aluminum sheet 2 is simple, which is convenient for repeated disassembly, and is convenient for subsequent cell repair and re-injection.

As shown in FIG. 1 to FIG. 6 , the battery cover plate 100 according to the embodiment of the present invention includes: a light aluminum sheet 2 and a sealing member 1 . Among them, it should be noted that the battery cover plate 100 of the present invention also includes a lower plastic 6, a welding ring, a plastic on the negative electrode, a negative pole post 4, a positive pole post 3, a plastic on the positive pole, a sealing ring, and an explosion-proof valve protection sheet. 5 and explosion-proof valve. Among them, the lower plastic 6 is located below the light aluminum sheet 2, the plastic on the negative electrode and the plastic on the positive electrode are both installed above the light aluminum sheet 2, and the positive pole 3 is installed at the plastic on the positive electrode, and the negative pole 4 is installed on the negative electrode plastic.

Among them, the smooth aluminum sheet 2 is provided with a liquid injection hole 21. As shown in FIG. 6, the liquid injection hole 21 penetrates the smooth aluminum sheet 2 along the thickness direction of the smooth aluminum sheet 2, that is, the liquid injection hole 21 is a through hole. After the battery cover plate 100 is installed on the top of the battery pack, the liquid injection operation can be performed at the liquid injection hole 21 toward the inside of the battery pack.

The sealing member 1 is used for sealing and matching with the light aluminum sheet 2 at the liquid injection hole 21. Specifically, the sealing member 1 includes a screwing part 11 and a sealing part 12, wherein the sealing part 12 and the screwing part 11 are integrally formed. That is, the two do not need to be designed and formed separately, which is beneficial to reduce the design cost, and during the specific installation, the two can be installed simultaneously, with fewer installation steps and lower assembly costs. As shown in FIG. 2 and FIG. 3 , the sealing portion 12 is connected to the end of the screwing portion 11 , wherein the screwing portion 11 is configured as a stud, that is, the outer peripheral wall of the screwing portion 11 is provided with an external thread, and the sealing portion 12 is structured It is a plate-like structure, and as shown in FIG. 2 , the upper end of the screwing portion 11 is fixedly connected to the lower surface of the sealing portion 12 .

Wherein, during the specific installation, the screwing portion 11 extends into the liquid injection hole 21, and the inner peripheral wall of the liquid injection hole 21 is provided with an internal thread, so that the external thread of the screwing portion 11 and the internal thread of the liquid injection hole 21 are connected to each other. Thread fit, so that the threaded portion 11 is detachably installed in the liquid injection hole 21 . In the process of screwing the screwing portion 11 to the liquid injection hole 21, the sealing portion 12 gradually approaches the smooth aluminum sheet 2 until the sealing portion 12 completely presses against the smooth aluminum sheet 2, and the sealing portion 12 presses against the smooth aluminum sheet 2. At the periphery of the liquid injection hole 21, it can seal the circumference of the liquid injection hole 21, so that the sealing member 1 is not only screwed and fixed with the light aluminum sheet 2, but also can be pressed by the sealing part 12. With the cooperation, the sealing of the liquid injection hole 21 can be realized, and the tightness of the liquid injection hole 21 can be ensured.

In the specific design, a glue injection hole 14 can be provided in the sealing part 12 , the glue injection hole 14 is configured as a through hole, and the glue injection hole 14 penetrates to the surface of the light aluminum sheet 2 , as shown in FIG. 2 , the glue injection hole 14 runs along the The sealing portion 12 penetrates in the thickness direction, and as shown in FIG. In this way, after the sealing member 1 is installed on the bare aluminum sheet 2, the glue can be injected from the glue injection hole 14 toward the surface of the bare aluminum sheet 2, so that the glue fills the surface of the bare aluminum sheet 2 and the glue injection hole 14. In this way, the bonding and fixing of the sealing portion 12 and the bare aluminum sheet 2 are realized, thereby facilitating the improvement of the installation stability of the sealing member 1 on the bare aluminum sheet 2 .

According to the battery cover plate 100 according to the embodiment of the present invention, by constructing the screw connection portion 11 and the sealing portion 12 of the sealing member 1 into an integral molding structure, the connection and sealing of the sealing member 1 at the liquid injection hole 21 only requires injection molding A structural part, reducing the number of structures and design costs, and the connection between the sealing part 1 and the light aluminum sheet 2 is simple, which is convenient for repeated disassembly, and is convenient for subsequent cell repair and refilling, and the sealing part 1 is in the light aluminum sheet 2 The installation stability is better.

In some embodiments, there are a plurality of glue injection holes 14 , and the plurality of glue injection holes 14 are arranged around the screw connection portion 11 . In this way, a plurality of glue injection holes 14 are provided in the circumferential direction of the screw connection portion 11 , so that the The sealing portion 12 has a large amount of colloid injected at various positions, which is beneficial to improve the installation stability of the sealing portion 12 and the light aluminum sheet 2 .

In some embodiments, the glue injection holes 14 are distributed in groups, and each group includes two glue injection holes 14 , and the two glue injection holes 14 of each group are distributed on two radial sides of the screw connection portion 11 facing each other. As shown in FIG. 1 and FIG. 4 , the glue injection holes 14 are a group, and the two glue injection holes 14 of the group are respectively arranged on both sides of the screw connection portion 11 , and the two glue injection holes 14 are located in the screw connection portion 11 . The two radially opposite positions of the sealing portion 12 can be fixed with the bare aluminum sheet 2 by gluing, thereby improving the installation stability of the sealing member 1 and the bare aluminum sheet 2 .

In some embodiments, the surface of the light aluminum sheet 2 is provided with a glue sink 23 that is directly opposite to the glue injection hole 14, that is to say, the glue injection hole 14 and the glue sink 23 can be used together as a glue filling area. When the sealing part 12 is moved relative to the light aluminum sheet 2 until the glue injection hole 14 and the glue sink 23 are facing each other, the glue is injected into the glue injection hole 14, so that the glue injection hole 14 and the glue sink 23 are filled with sufficient amount. The structural adhesive is used to ensure the stability of the connection between the sealing part 12 and the light aluminum sheet 2 . And by setting in this way, the structural adhesive can play the role of preventing the screw from loosening to the screw connection portion 11 after solidification.

In some embodiments, the bare aluminum sheet 2 has an installation sink 22 , and the installation sink 22 is concavely formed on the surface of the bare aluminum sheet 2 . As shown in FIG. 6 , the installation sink 22 is on the bare aluminum sheet 2 . The surface is concavely formed, and the liquid injection hole 21 is located at the bottom of the installation sink 22 . Wherein, the sealing portion 12 and the screwing portion 11 can both be set to have a circular cross-section, and the radial dimension of the screwing portion 11 is smaller than the radial dimension of the sealing portion 12, and at the same time, the mounting sink 22 can be configured to have a circular shape The groove structure of the cross section, the liquid injection hole 21 is configured as a hole structure with a circular cross section.

In this way, during the specific installation, the screwing portion 11 can be inserted from the upper end of the installation sink 22, and penetrate through the installation sink 22 to extend into the liquid injection hole 21 to realize the screw connection with the liquid injection hole 21, and in the screw After the connecting portion 11 is effectively matched with the liquid injection hole 21 , the sealing portion 12 is located in the installation sink 22 . Therefore, the sealing member 1 and the light aluminum sheet 2 form an embedded installation structure, that is, after the two are connected and fixed, the sealing member 1 will not protrude from the upper surface of the battery cover plate 100, so as to ensure the safety of the battery cover plate 100. The surface is flat and the structure is stable.

In some embodiments, the battery cover plate 100 further includes an elastic pre-tensioning portion 13, wherein the elastic pre-tensioning portion 13 is located at the connection between the screwing portion 11 and the sealing portion 12. As shown in FIG. 2 and FIG. 6, the screwing portion 11 is connected to the lower surface of the sealing part 12 , and the elastic preloading part 13 is also located on the lower surface of the sealing part 12 and is in contact with the outer peripheral wall of the screwing part 11 . And the elastic preloading part 13 is made of elastic material, that is, the elastic preloading part 13 has a certain elastic denaturing ability. Wherein, the elastic preloading part 13 can be configured as an elastic block, and the elastic preloading part 13 can be made of silicone rubber.

Therefore, after the specific installation, the elastic preloading portion 13 elastically presses against the bottom wall of the installation sink 22, so that after the screw connection portion 11 and the liquid injection hole 21 cooperate stably, the elastic preloading portion 13 is in a compressed state, Moreover, a certain rebound force can be applied to the sealing part 12 and the screwing part 11 , so that the screwing part 11 and the inner peripheral wall of the liquid injection hole 21 are closely attached, thereby improving the installation stability of the sealing element 1 at the light aluminum sheet 2 .

In some embodiments, as shown in FIG. 2 and FIG. 3 , the elastic pre-tensioning portion 13 is configured as a ring shape, the elastic pre-tensioning portion 13 is sleeved outside the screwing portion 11 , and the elastic pre-tensioning portion 13 is pressed against the installation sink. 22 is the area surrounding the injection hole 21. That is to say, the elastic pre-tightening portion 13 can play an elastic pre-tightening effect on each position in the circumferential direction of the screwing portion 11 , that is, after the screwing portion 11 and the liquid injection hole 21 are screwed together, the screw connection can be ensured. The elastic pre-tightening force of the connecting part 11 at each position in the circumferential direction is relatively balanced, so as to avoid the occurrence of excessive elastic pre-tightening force at the local position of the screw-connecting part 11, which may lead to the thread inclination of the screw-connecting part 11, thereby preventing the occurrence of disassembly. Condition of thread structure failure.

In some embodiments, the elastic pre-tensioning portion 13 protrudes from the surface of the sealing portion 12 to fit with the bottom wall of the installation sink 22. As shown in FIG. 2 and FIG. 6 , the lower surface of the elastic pre-tensioning portion 13 faces downward It protrudes from the lower surface of the sealing portion 12 . In this way, during the installation and cooperation of the screwing portion 11 and the injection hole 21 , the elastic preloading portion 13 can effectively contact the bare aluminum sheet 2 , and when the sealing portion 12 is in contact with the bare aluminum sheet 2 , the elastic preloading portion 13 It has a certain amount of compression, so that an effective elastic force can be provided for the screw connection part 11 to keep the screw connection part 11 in a stable structural state.

In some embodiments, the screwing part 11 , the sealing part 12 and the elastic preloading part 13 are integrally injection-molded, especially without the need for separate molding and installation. Compared with the traditional way of combining multiple structural parts, the structure is simple and the installation is simple. lower cost.

The utility model also provides a battery pack.

According to the battery pack according to the embodiment of the present invention, the battery cover plate 100 of any of the above-mentioned embodiments is provided. The connection and sealing at the liquid injection hole 21 only needs to inject one structural part, which reduces the number of structures and reduces the design cost, and the connection between the sealing part 1 and the light aluminum sheet 2 is simple, which is convenient for repeated disassembly, and is convenient for subsequent cell repair and re-repair. Liquid injection, and the installation stability of the sealing element 1 on the light aluminum sheet 2 is better.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features.

In the description of the present invention, "plurality" means two or more.

In the description of the present invention, a first feature being "above" or "under" a second feature may include that the first and second features are in direct contact, or that the first and second features are not in direct contact but through Additional feature contacts between them.

In the description of the present invention, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a high level on the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present invention. Variations, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A battery cover plate (100), characterized in that, comprising: a light aluminum sheet (2), wherein the light aluminum sheet (2) is provided with a liquid injection hole (21); A sealing member (1), the sealing member (1) comprises a screwing part (11) and a sealing part (12), the sealing part (12) is connected with the end of the screwing part (11), the The threaded portion (11) extends into the liquid injection hole (21) to be screwed with the liquid injection hole (21), and the sealing portion (12) is adapted to press against the liquid injection hole (21) ) around ); where The sealing portion (12) is provided with a glue injection hole (14), and the glue injection hole (14) penetrates to the surface of the light aluminum sheet (2). 2 . The battery cover plate ( 100 ) according to claim 1 , wherein the glue injection holes ( 14 ) are plural, and the plurality of glue injection holes ( 14 ) surround the screw connection portion ( 2 . 3 . 11) Settings. 3. The battery cover plate (100) according to claim 1, wherein the glue injection holes (14) are distributed in groups, and each group includes two glue injection holes (14), and each group The two said glue injection holes (14) of the said screw connection part (11) are distributed on both sides of the radial direction facing each other. 4 . The battery cover plate ( 100 ) according to claim 1 , wherein the surface of the light aluminum sheet ( 2 ) is provided with a glue sink ( 23 ) facing the glue injection hole ( 14 ). 5 . . 5. The battery cover plate (100) according to any one of claims 1-4, wherein the light aluminum sheet (2) has an installation sink (22), and the liquid injection hole (21) Located at the bottom of the installation sink (22), the screwing portion (11) is suitable for being installed into the liquid injection hole (21) from the installation sink (22), and the sealing portion (12) ) is located in the installation sink (22). 6 . The battery cover plate ( 100 ) according to claim 5 , further comprising an elastic pre-tensioning portion ( 13 ), wherein the elastic pre-tensioning portion ( 13 ) is located between the screwing portion ( 11 ) and the The joint of the sealing portion (12) is adapted to elastically press against the bottom wall of the installation sink (22). 7 . The battery cover plate ( 100 ) according to claim 6 , wherein the elastic pre-tensioning portion ( 13 ) is configured in an annular shape, and the elastic pre-tensioning portion ( 13 ) is sleeved on the threaded portion. 8 . (11), and the elastic pre-tightening portion (13) is pressed against the area surrounding the liquid injection hole (21) of the installation sink (22). 8 . The battery cover plate ( 100 ) according to claim 6 , wherein the elastic preloading portion ( 13 ) protrudes from the surface of the sealing portion ( 12 ) so as to be connected with the mounting sink ( 22 ). 9 . ) to the bottom wall. 9 . The battery cover plate ( 100 ) according to claim 6 , wherein the screw connection portion ( 11 ), the sealing portion ( 12 ) and the elastic preloading portion ( 13 ) are integrally injection-molded . 10. A battery pack, characterized in that, the battery cover plate (100) according to any one of claims 1-9 is provided.

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