Pole with sealing ring forward mounting structure and battery cover plate

Abstract

The utility model discloses a pole with a sealing ring forward mounting structure and a battery cover plate, the pole comprises a cylindrical body and a hanging disc which are integrally formed, one end of the cylindrical body penetrates through a through hole in a top cover sheet, a flange for sleeving a sealing ring is formed at the joint of the other end of the cylindrical body and the hanging disc, and the axial height of the flange is smaller than the thickness of the sealing ring; a concave inverted buckling part and a guide part are also formed on the outer peripheral surface of the cylindrical body; the inverted buckling part is used for being embedded into plastic to limit the pole from falling off from the top cover plate; the guide part is arranged between the flange and the reverse buckling part and is used for guiding the sealing ring into the flange; the outer diameter of the hanging disc is larger than the diameter of the through hole of the top cover piece, and the upper surface of the hanging disc and the lower surface of the top cover piece are matched to abut against the sealing ring. According to the pole and the battery cover plate provided by the utility model, the problem that the sealing ring cannot achieve a good sealing effect due to the fact that the sealing ring is easily clamped by the existing pole structure and cannot be mounted in the forward direction is solved.

Description

Technical Field

[0001] The utility model relates to the field of battery production, in particular to a pole and a battery cover with a sealing ring forward installation structure. Background Art

[0002] In existing battery covers, the pole and the top cover of the battery cover are made of different materials. The pole is made of copper with better conductivity, while the top cover is made of aluminum. The pole and the top cover need to be insulated, and a seal is provided between them. The pole is also configured in an inverted stepped structure or an I-shaped structure, and a circle of hard plastic is injection-molded around the pole to lock the pole on the top cover. At the same time, the entire pole is pulled outward to compress the seal to ensure sealing.

[0003] However, in the above structure, the undercut in the middle of the terminal easily causes the seal to get stuck during installation, causing the seal to shift or tilt at the undercut, preventing it from falling into the correct position. This also makes it impossible to ensure that the seal and the terminal are coaxial, resulting in the seal between the top cover and the terminal failing to achieve an effective sealing function, seriously affecting the safety and stability of the battery. More importantly, the above-mentioned shift or tilt is difficult to observe from the outside and can only be detected using expensive optical transmission equipment, which significantly increases the detection cost.

[0004] In summary, the existing poles and battery covers need further improvement. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology, and to provide a pole and a battery cover with a sealing ring forward installation structure, which has a simple structure, is easy to manufacture, easy to implement and has low cost, and solves the problem that the existing pole structure is easy to get stuck in the sealing ring, and the sealing ring cannot be installed forward, resulting in the sealing ring not being able to achieve a good sealing effect.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A pole with a positive installation structure for a sealing ring, which is installed on a top cover sheet and cooperates with the top cover sheet to clamp the sealing ring; the pole includes an integrally formed columnar body and a hanging plate, one end of the columnar body passes through a through hole on the top cover sheet, and the other end forms a flange for the sealing ring to be sleeved at the connection with the hanging plate, and the axial height of the flange is less than the thickness of the sealing ring; the outer peripheral surface of the columnar body also forms an inwardly concave undercut portion and a guide portion, the undercut portion is used to embed plastic to limit the pole from falling off the top cover sheet; the guide portion is provided between the flange and the undercut portion, and is used to guide the sealing ring into the flange; the outer diameter of the hanging plate is larger than the diameter of the through hole of the top cover sheet, and the upper surface of the hanging plate cooperates with the lower surface of the top cover sheet to press against the sealing ring.

[0008] Furthermore, the thickness of the sealing ring is greater than the axial spacing of the undercut portions on the columnar body.

[0009] Furthermore, a plurality of embedding grooves are formed on the inner peripheral wall of the columnar body corresponding to the undercut portion, and the embedding grooves are continuously arranged in a ring shape along the circumferential direction.

[0010] Furthermore, the columnar body is provided with two or more undercut portions along the axial direction, and the spacing between the undercut portions is smaller than the thickness of the sealing ring.

[0011] Furthermore, the guide portion on the pole is an inclined surface, and the inclined surface is arranged in a circumferential ring shape; in the axial direction, the inclined surface is inclined outward toward the flange from the side connected to the undercut portion to guide the sealing ring to slide along the inclined surface into the outer periphery of the flange and stop.

[0012] A battery cover comprises a top cover, a pole, a sealing ring and a lower cover; the pole has a positive mounting structure for the sealing ring, one end of the pole is hung on the lower surface of the top cover and cooperates with it to clamp and seal; the other end passes through the top cover and is formed into a locking ring by plastic injection molding to lock the pole.

[0013] Furthermore, the upper surface of the top cover plate has a plurality of limiting grooves and protrusions, each of which is arranged at intervals along the circumferential edge of the through hole and cooperates with the locking ring to limit the circumferential rotation of the locking ring.

[0014] Furthermore, it also includes an explosion-proof valve plate, which is installed in the middle position of the top cover plate.

[0015] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention provides a pole and a battery cover with a sealing ring forward installation structure, which has a simple structure, is easy to manufacture, easy to implement and low in cost, and solves the problem that the existing pole structure is easy to get stuck with the sealing ring, and the sealing ring cannot be installed forward, resulting in the sealing ring not being able to achieve a good sealing effect; the present invention optimizes and improves the structure of the pole, so that the sealing ring can be installed forward, avoiding the sealing ring being unable to fall into its sealing position (i.e., the flange periphery position) due to tilting and not being installed in place during manual installation, thereby improving installation efficiency and accuracy, thereby ensuring the sealing reliability between the top cover and the pole, effectively preventing the battery liquid from leaking inside the battery, and improving the safety of battery use; not only that, the pole is less likely to loosen and fall off, and the sealing ring is not easy to get stuck in the undercut part and affect the secondary injection molding of hard glue, which cannot be filled due to the obstruction of the sealing ring, resulting in failure of the undercut, and then the pole becomes loose, and cannot withstand the situation where the pole is detached due to battery expansion during subsequent use.

[0017] (2) The thickness of the sealing ring of the present invention is greater than the axial distance of the undercut portion on the columnar body. Thus, when the sealing ring is installed, the sealing ring is ensured not to be radially offset into the undercut portion. This effectively prevents the installer from installing the seal incorrectly or by mistake, and has a good positive installation guide effect.

[0018] (3) The new type forms a plurality of embedded grooves in the undercut part, and the grooves are continuously arranged in a ring shape along the circumference. This provides more glue space when injecting hard glue during the secondary injection molding. At the same time, it can reduce the gap between the upper and lower surfaces of the undercut part due to shrinkage, thereby ensuring stability and reliability after injection.

[0019] (4) The new type is provided with two or more undercut parts, which plays a role of multiple glue injection and has a better anti-slip effect.

[0020] (5) The present invention provides an inclined surface on the guide portion of the pole, so that even if the sealing ring deflects when being inserted, it can be smoothly guided along the inclined surface to the flange for installation, thus ensuring that the sealing ring is installed in a positive and flat manner.

[0021] (6) The battery cover described in the present invention adopts a pole with a forward installation structure to ensure the reliability of the sealing ring installation, reduce the risks caused by installation errors, and eliminate the need for secondary inspection through expensive inspection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are 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.

[0023] Figure 1 This is a schematic diagram of the three-dimensional exploded structure of the battery cover in Example 1 of the present utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the pole in the first embodiment of the present utility model;

[0025] Figure 3 This is a cross-sectional view of the battery cover in Example 1 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional exploded structure of the battery cover in the second embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the pole in the second embodiment of the present utility model;

[0028] Figure 6This is a cross-sectional view of the battery cover in the second embodiment of the present invention. DETAILED DESCRIPTION

[0029] 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 described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] In the claims, description and drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0031] In the claims, specification and above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0032] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0033] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0034] See also Figure 1-3 , Example 1:

[0035] This embodiment is described by taking a battery cover plate equipped with a pole with a positive sealing ring installation structure as an example, which mainly includes the following parts: a top cover plate 1, a pole 2, a sealing ring 3, a locking ring 4, an explosion-proof valve 5 and a lower cover plate 6;

[0036] The top cover sheet 1 is made of aluminum material and forms at least three through holes 11, which are respectively used to install the positive electrode 2, the negative electrode 2 and the explosion-proof valve 5; the upper surface 1A of the top cover sheet 1 in this embodiment is formed with a plurality of limiting grooves 12 and protrusions 13 on the edge of the through hole 11 for installing the electrode 2, and each of the limiting grooves 12 and protrusions 13 is arranged at intervals along the circumference of the through hole 11, and cooperates with the locking ring 4 to limit the circumferential rotation of the electrode 2.

[0037] The pole 2 is made of copper and is cylindrical or square; one end of the pole 2 is hung on the lower surface 1B of the top cover sheet 1 and cooperates with it to clamp and seal; the other end passes through the top cover sheet 1 and is locked by a plastic injection-molded lock ring 4; the pole 2 of this embodiment includes an integrally formed columnar body 21 and a hanging plate 22, one end of the columnar body 21 passes through the through hole 11 on the top cover sheet 1, and the other end forms a flange 23 for the sealing ring 3 to be mounted at the junction with the hanging plate 22, and the axial height of the flange 23 is less than the thickness of the sealing ring 3 (in this embodiment, the axial height of the flange 23 is set less than the thickness of the sealing ring 3, so as to avoid the flange 23 and the top cover sheet 1 from interfering with each other, so that the sealing ring 3 cannot be compressed and deformed, and thus cannot achieve a sealing effect).

[0038] The outer periphery of the columnar body 21 also forms an inwardly concave undercut portion 24 and a guide portion 25;

[0039] The undercut portion 24 is used to embed plastic to prevent the pole 2 from falling off the top cover 1. It should be noted that in this embodiment, the axial spacing of the undercut portions 24 on the columnar body 21 is set to be smaller than the thickness of the sealing ring 3. In this way, the sealing ring 3 is not easily misplaced when installed and is installed in the undercut portion 24 and cannot reach the flange 23. In addition, in order to ensure that the locking ring 4 can stably fix and insulate the pole 2, a plurality of embedding grooves 241 are formed on the inner peripheral wall of the undercut portion 24 (see Figure 5 ), each of the embedding grooves 241 is continuously arranged in a ring shape along the circumferential direction, and when the secondary injection molding is performed to form the lock ring 4, the plastic can be poured into the embedding groove 241 to form an axial anti-slip effect and prevent circumferential rotation;

[0040] In addition, in order to further enhance the anti-slip function, two or more undercut portions 24 may be provided in the columnar body 21 along the axial direction, and the spacing between the undercut portions 24 is smaller than the thickness of the sealing ring 3 .

[0041] The guide portion 25 is provided between the flange 23 and the undercut portion 24 and is used to guide the sealing ring 3 into the flange 23;

[0042] The outer diameter of the hanging plate 22 is larger than the diameter of the through hole 11 of the top cover sheet 1, and its upper surface 1A and the lower surface 1B of the top cover sheet 1 cooperate to press against the sealing ring 3. In this way, the sealing ring 3 is squeezed and deformed by the hanging plate 22 and the lower surface 1B of the top cover sheet 1, thereby achieving a sealing effect and preventing the battery liquid in the battery case from leaking from the gap between the terminal 2 and the top cover sheet 1.

[0043] The lock ring 4 is injection molded and is injected into the undercut portion 24 of the pole 2 and the upper surface 1A of the top cover 1 by secondary injection molding.

[0044] In this embodiment, an explosion-proof valve 5 is also included. It is installed in the through hole 11 in the middle of the top cover plate 1 and is connected as a whole by laser welding. It is used to crack when the internal pressure of the motor is too high to prevent explosion, thereby ensuring the safety of the entire battery.

[0045] During actual production and assembly,

[0046] (1) An aluminum top cover sheet 1 is first prepared by die casting. A plurality of limiting grooves 12 and protrusions 13 are formed on the upper surface 1A of the top cover sheet 1, and the limiting grooves 12 and protrusions 13 are spaced apart.

[0047] (2) The copper rod is turned to form a pole 2, which is formed with at least two undercut portions 24, a guide portion, a flange 23, and a hanging plate 22. It should be noted that an embedding groove 241 is also pressed into the inner wall of the undercut portion 24;

[0048] (3) A sealing ring 3 made of a high-temperature resistant material is sleeved along one end of the pole 2. During the sleeve installation process, since the thickness of the sealing ring 3 is greater than the spacing of the undercut portion 24, the sealing ring 3 will not be stuck in the undercut portion 24, and then slides into the flange 23 along the axial direction of the pole 2;

[0049] (4) The pole 2 with the sealing ring 3 is directly installed into the through hole 11 of the top cover 1, and the sealing ring 3 is located between the top cover 1 and the hanging plate 22. Due to the application of a certain force on the hanging plate 22, the sealing ring 3 is squeezed and deformed;

[0050] (5) By means of secondary injection molding, molten plastic is injected into the undercut portion 24 between the top cover sheet 1 and the pole 2, so that the space between the pole 2 and the top cover sheet 1 is filled with plastic, and the plastic also forms a ring on the upper surface 1A of the top cover sheet 1, which becomes the lock ring 4 after cooling and hardening; it should be noted that the lock ring 4 is also wrapped and matched with the limit groove 12 and the protrusion 13 in the molten state, thereby preventing the pole 2 from moving in the axial direction and preventing the loose displacement from affecting the sealing performance of the sealing ring 3;

[0051] (6) The lower cover plate 6 is then installed on the lower surface 1B of the top cover plate 1, and the explosion-proof valve 5 is welded to the top cover plate 1 by laser welding to complete the assembly of the battery cover plate.

[0052] Example 2:

[0053] The same parts of the second embodiment as those of the first embodiment will not be repeated here. The difference is as follows:

[0054] As shown in Figures 4-6, the guide portion 25 on the pole 2 is an inclined surface 25A, and the inclined surface 25A is arranged in a circumferential ring. In the axial direction, the inclined surface 25A is inclined outward from the side connected to the undercut portion 24 toward the flange 23 to guide the sealing ring 3 to slide along the inclined surface 25A into the outer periphery of the flange 23.

[0055] During actual installation,

[0056] Even if the sealing ring 3 mistakenly enters the undercut portion 24, it can slide along the inclined surface 25A to the flange 23 during the assembly process. Under the guidance of the inclined surface 25A, it can accurately press against the flange 23 without tilting, so that the sealing ring 3 can fit tightly with the top cover piece 1 and the hanging plate 22, ensuring a stable and reliable seal and achieving an effective seal.

[0057] The above description of the specification and embodiments is used to explain the protection scope of the present utility model, but does not constitute a limitation on the protection scope of the present utility model.

Claims

1. A pole with a seal ring forward mounting structure, which is mounted on a top cover and cooperates with the top cover to clamp the seal ring; characterized in that: The pole includes an integrally formed columnar body and a hanging plate, one end of the columnar body passes through the through hole on the top cover sheet, and the other end forms a flange for the sealing ring to be mounted at the connection with the hanging plate, and the axial height of the flange is less than the thickness of the sealing ring; the outer peripheral surface of the columnar body also forms an inwardly concave undercut portion and a guide portion, the undercut portion is used to embed plastic to limit the pole from falling off the top cover sheet; the guide portion is provided between the flange and the undercut portion, and is used to guide the sealing ring into the flange; the outer diameter of the hanging plate is larger than the diameter of the through hole of the top cover sheet, and the upper surface of the hanging plate and the lower surface of the top cover sheet cooperate to press against the sealing ring.

2. The pole with a seal ring forward installation structure according to claim 1, characterized in that: The thickness of the sealing ring is greater than the axial spacing of the undercut portions on the columnar body.

3. The pole with a seal ring forward installation structure according to claim 2, characterized in that: A plurality of embedding grooves are formed on the inner peripheral wall of the columnar body corresponding to the undercut portion, and the embedding grooves are continuously arranged in a ring shape along the circumferential direction.

4. The pole with a seal ring forward installation structure according to claim 3, characterized in that: The columnar body is provided with two or more undercut portions along the axial direction, and the interval between the undercut portions is smaller than the thickness of the sealing ring.

5. The pole with a seal ring forward installation structure according to claim 1, 2 or 3, characterized in that: The guide portion on the pole is an inclined surface, and the inclined surface is arranged in a circumferential ring; in the axial direction, the inclined surface is inclined outwardly toward the flange from the side connected to the undercut portion to guide the sealing ring to slide along the inclined surface into the outer periphery of the flange and stop.

6. A battery cover, comprising a top cover, a terminal, a sealing ring, and a bottom cover; characterized in that: The pole is a pole with a positive sealing ring installation structure as described in any one of claims 1 to 5, one end of the pole is hung on the lower surface of the top cover plate and cooperates with it to clamp the seal; the other end passes through the top cover plate and is formed into a locking ring by plastic injection molding to lock the pole.

7. The battery cover according to claim 6, wherein: The upper surface of the top cover plate is provided with a plurality of limiting grooves and protrusions, each of which is arranged at intervals along the circumferential edge of the through hole and cooperates with the locking ring to limit the circumferential rotation of the locking ring.

8. The battery cover according to claim 7, wherein: It also includes an explosion-proof valve plate, which is installed in the middle position of the top cover plate.

Images