Threaded battery end cover and battery

Abstract

The utility model provides a threaded battery end cover and a battery, the threaded battery end cover comprises a cover plate, and two pole assemblies are arranged in the cover plate; the pole assembly comprises a pole which comprises a connecting part located on the first side of the cover plate and a pole body part penetrating through a mounting hole in the cover plate and extending to the second side of the cover plate; a first thread structure is arranged on the peripheral surface of the cylinder part; a second thread structure corresponding to the first thread structure is arranged in the connecting ring; when the connecting ring is in threaded connection with the pole, the connecting ring is located on the second side of the cover plate and abuts against the cover plate; the injection molding part is arranged on the second side of the cover plate and wraps all the outer wall surfaces of the connecting ring and the extension peripheral surface of the pole; and the sealing element is arranged between the pole and the cover plate to seal the mounting hole. According to the threaded battery end cover provided by the utility model, the production cost of the threaded battery end cover can be reduced on the premise of ensuring the structural stability and functionality.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a threaded battery end cover and a battery. Background Art

[0002] Secondary batteries, also known as rechargeable batteries or storage batteries, are batteries that can be recharged to activate the active materials after the battery is discharged and continue to be used. Compared with primary batteries, secondary batteries have become a widely used chemical "power source" in the world, with advantages such as stable voltage, safety and reliability, low price, wide application range, abundant raw materials and high recycling rate. In recent years, in order to cope with environmental problems, gasoline price problems and energy storage problems, the application of secondary batteries has rapidly expanded to hybrid vehicles, electric vehicles and energy storage systems.

[0003] In order to lead the electric energy inside the secondary battery to the outside, the battery top cover will have a mounting through hole, and the electrode terminal will be fixed in the mounting through hole. At present, the pole is generally fixed by injection molding on the outside of the top cover corresponding to the pole. In order to ensure the stability of the fixation, the pole needs to have a more complex circumferential structure, the manufacturing process is complex, and the manufacturing cost is high. At the same time, it is necessary to use an insulating material with high toughness and good insulation performance for injection molding, and the material cost is high. Therefore, how to reduce the production cost of the battery cover while ensuring the structural stability and functionality has become an urgent problem to be solved. Utility Model Content

[0004] Therefore, in order to overcome the above problems, the utility model provides a threaded battery end cover which is connected to the pole by a connecting ring and then fixed by an injection molded part, and has a low production cost of the pole and a low injection molding cost of the injection molded part, and provides a battery corresponding to the threaded battery end cover.

[0005] According to a first aspect, the utility model provides a threaded battery end cover, comprising a cover plate, in which two pole assemblies are installed; the pole assemblies include:

[0006] The pole comprises a connecting portion located on a first side of the cover plate, and a column portion penetrating through a mounting hole in the cover plate and extending to a second side of the cover plate; a first thread structure is provided on a peripheral surface of the column portion;

[0007] A connecting ring, wherein a second thread structure corresponding to the first thread structure is arranged inside; when the connecting ring is threadedly connected to the pole, the connecting ring is located on the second side of the cover plate and abuts against the cover plate;

[0008] The injection molded part is arranged on the second side of the cover plate and covers the entire outer wall surface of the connecting ring and the outer peripheral surface of the pole;

[0009] The sealing member is arranged between the pole and the cover plate to seal the mounting hole.

[0010] Optionally, a plurality of reinforcement holes are provided on the end surface of the connecting ring away from the cover plate, and the injection molded part has reinforcement columns formed in the reinforcement holes.

[0011] Optionally, the cover plate is further provided with a first sunken platform surrounding the outer circumference of the mounting hole, and the first sunken platform is communicated with the mounting hole; when the connecting ring is threadedly connected to the pole, the connecting ring abuts against the bottom of the first sunken platform.

[0012] Optionally, the injection molded part has an injection molding step corresponding to the first sinking platform.

[0013] Optionally, the sealing member includes a sealing ring, which includes a first ring portion and a second ring portion formed by flanging outward from one end of the first ring portion. When the column portion is inserted into the mounting hole, the first ring portion is pressed between the column portion and the mounting hole, and the second ring portion is pressed between the connecting portion and the cover plate.

[0014] Optionally, the sealing member further comprises a sealing gasket which is sleeved outside the column body of the pole, and when the connecting ring is threadedly connected to the pole, the sealing gasket is pressed between the connecting ring and the cover plate.

[0015] Optionally, the threaded battery end cap further comprises:

[0016] The insulating member is arranged on the second side of the cover plate to isolate the connecting portion of the pole from the cover plate.

[0017] Optionally, the cover plate is further provided with a second sunken platform surrounding the outer circumference of the mounting hole, and the second sunken platform is connected to the mounting hole;

[0018] The insulating member is provided with a boss corresponding to the second sunken platform, and the connecting portion of the pole is arranged in the recess of the boss.

[0019] According to the second aspect, the utility model also provides a battery, comprising:

[0020] The shell, the electrode assembly and the threaded battery end cap in any one of the embodiments of the first aspect above, the electrode assembly is arranged in the shell, and the threaded battery end cap covers the opening of the shell; the pole is electrically connected to the electrode assembly.

[0021] The technical solution of the utility model has the following advantages:

[0022] The threaded battery end cap provided by the utility model provides a connecting ring which can be threadedly connected to the pole on the second side of the cover plate (that is, the outer side of the cover plate away from the corresponding battery shell), so that the connecting ring can be connected to the connecting portion of the pole located on the first side of the cover plate (that is, the inner side of the cover plate facing the corresponding battery shell), thereby preliminarily fixing the pole in the mounting hole, and then further fixing it based on the injection molded part. Compared with the method of fixing only by injection molding in the prior art, the requirement for injection molding fixing strength is reduced, that is, the pole does not need to form a complex appearance, thereby reducing its production cost (the pole with a connecting portion and a columnar portion in the threaded battery end cap can be produced by cold heading and thread rolling processes), so that the injection molded part does not need to meet the high-level requirements of high toughness and good insulation performance, thereby reducing its material cost; thereby, the effect of reducing its production cost under the premise of ensuring the structural stability and performance of the battery cover is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a threaded battery end cap provided by an embodiment of the utility model;

[0025] Figure 2 An exploded schematic diagram of a threaded battery end cap provided by an embodiment of the utility model;

[0026] Figure 3 A partial cross-sectional view of a threaded battery end cap provided by an embodiment of the utility model;

[0027] Description of reference numerals:

[0028] 100-cover plate; 101-mounting hole; 102-first sinking platform; 103-second sinking platform;

[0029] 200-pole assembly;

[0030] 210-pole; 211-connecting portion; 212-column portion;

[0031] 220-connecting ring; 221-reinforcement hole;

[0032] 230-injection molded part; 231-reinforcement column; 232-injection molded step;

[0033] 240 - sealing member; 241 - sealing ring; 241a - first ring portion; 241b - second ring portion; 242 - sealing gasket; 300 - insulating member; 301 - boss. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0038] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the present invention, or those features that are not relevant to the implementation of the present invention) may be described. Moreover, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0039] The embodiment of the utility model provides a battery, which can be applied to the fields of oil-electric hybrid vehicles or electric vehicles. Specifically, the battery includes a shell, an electrode assembly and a threaded battery end cap, wherein the electrode assembly is arranged in the shell, the threaded battery end cap is arranged to cover the opening of the shell, and the poles in the threaded battery end cap (that is, the two poles in the two pole assembly, respectively the positive pole and the negative pole) are electrically connected to the electrode assembly.

[0040] Please refer to Figure 1-Figure 3 , is a schematic structural diagram of a threaded battery end cover provided in an embodiment of the utility model, wherein the threaded battery end cover comprises a cover plate 100 and two pole assemblies 200 , and the two pole assemblies 200 are installed in the cover plate 100 .

[0041] Please refer to Figure 2 and Figure 3The pole assembly 200 includes a pole 210, a connecting ring 220, an injection molded part 230 and a sealing part 240. The pole 210 includes a connecting part 211 located on the first side of the cover plate 100, and a column part 212 penetrating the mounting hole 101 in the cover plate 100 and extending to the second side of the cover plate 100, and the circumference of the column part 212 is provided with a first thread structure; the interior of the connecting ring 220 is provided with a second thread structure corresponding to the first thread structure, and when the connecting ring 220 is threadedly connected to the pole 210, the connecting ring 220 is located on the second side of the cover plate 100 and abuts against the cover plate 100; the injection molded part 230 is provided on the second side of the cover plate 100, and covers the entire outer wall surface of the connecting ring 220 and the outer peripheral surface of the pole 210; the sealing part 240 is provided between the pole 210 and the cover plate 100 to seal the mounting hole 101.

[0042] Specifically, the outer peripheral surface of the pole 210 refers to the peripheral surface of the portion of the pole 210 extending from the second side of the cover plate 100; however, those skilled in the art should understand that the connecting ring 220 will cover part of the outer peripheral surface of the pole 210, and the injection molded part 230 does not directly cover this part of the outer peripheral surface.

[0043] Specifically, the first side refers to the side of the cover plate 100 facing the shell when the threaded battery end cover is covered at the opening of the battery shell, that is, the second side can also be called the inner side of the cover plate 100; the second side is opposite to the first side, that is, the second side can also be called the outer side of the cover plate 100.

[0044] Specifically, the connection portion 211 of the pole 210 may be prepared by a cold heading process, and the first thread structure on the column portion 212 may be prepared by a thread rolling process.

[0045] Specifically, in order to improve the fixing effect of the injection molded part 230 on the connecting ring 220, thereby further improving the fixing effect on the pole 210, as shown in FIG. Figure 2 and Figure 3 As shown, a plurality of reinforcing holes 221 may be provided on the end surface of the connecting ring 220 away from the cover plate 100, and accordingly, the injection molded part 230 has reinforcing columns 231 formed in the reinforcing holes 221. In a specific implementation, the reinforcing holes 221 may be blind holes or through holes; Figure 3 In the figure, the reinforcing hole 221 is taken as a through hole for example. At this time, the corresponding reinforcing column 231 passes through the connecting ring 220 .

[0046] Specifically, in order to reduce the thickness of the threaded battery end cap in this embodiment and further improve the fixing effect of the injection molded part 230 on the pole 210, as shown in FIG. Figure 2 and Figure 3As shown, a first sink 102 surrounding the outer periphery of the mounting hole 101 may be provided on the cover plate 100, and the first sink 102 is connected to the mounting hole 101. At this time, when the connecting ring 220 is threadedly connected to the pole 210, the connecting ring 220 abuts against the bottom of the first sink 102. In this embodiment, in order to further improve the fixing effect of the injection molded part 230 on the pole 210, as shown in FIG. Figure 3 As shown, a gap can be provided between the outer periphery of the connecting ring 220 and the inner wall of the first sinker 102 , and an injection molded part 230 is provided to fill the gap, that is, the injection molded part 230 is provided with an injection molding step 232 corresponding to the first sinker 102 , so as to improve the injection molding strength of the injection molded part 230 .

[0047] Specifically, the seal 240 may be a sealing ring disposed between the column portion 212 of the pole 210 and the mounting hole 101 . The outer periphery of the column portion 212 and the inner wall of the mounting hole 101 jointly squeeze the sealing ring to achieve sealing of the mounting hole 101 .

[0048] Specifically, Figure 2 and Figure 3 As shown, the sealing member 240 may also be a sealing ring 241 including a first ring portion 241a and a second ring portion 241b. Specifically, the second ring portion 241b is formed by flanging outward from one end of the first ring portion 241a. When the column portion 212 is inserted into the mounting hole 101, the first ring portion 241a is pressed between the column portion 212 and the mounting hole 101, and the second ring portion 241b is pressed between the connecting portion 211 and the cover plate 100.

[0049] Specifically, on the basis of the above-mentioned sealing ring 241, in order to further improve the sealing effect of the sealing member 240, as Figure 2 and Figure 3 As shown, the sealing member 240 may further include a sealing gasket 242, which is sleeved outside the column portion 212 of the pole 210, and when the connecting ring 220 is threadedly connected to the pole 210, the sealing gasket 242 is pressed between the connecting ring 220 and the cover plate 100. In this embodiment, the compression amount of the sealing gasket 242 can be controlled based on the screwing of the threads between the connecting ring 220 and the column portion 212, that is, the compression amount of the sealing gasket 242 can be adjusted to the optimal state according to the needs in the specific application scenario, thereby ensuring the stability of its sealing performance.

[0050] Those skilled in the art should understand that Figure 3The figure shows the state of the sealing ring 241 and the sealing gasket 242 before being compressed. When the pole 210 and the connecting ring 220 are assembled, the sealing ring 241 and the sealing gasket 242 will be compressed in the axial direction, produce radial and axial deformation, and squeeze into the gap between the cover plate 100 and the pole 210, and the gap between the connecting ring 220, the cover plate 100 and the pole 210, forming a tight abutment to seal the mounting hole 101.

[0051] Specifically, when the cap plate 100 is a non-insulating cap plate 100, in order to achieve electrical isolation between the pole 210 and the cap plate 100, and between the electrode assembly inside the battery and the cap plate 100, and to prevent short circuit, as shown in FIG. Figure 1-Figure 3 As shown, the threaded battery end cover in this embodiment may further include an insulating member 300 , which is disposed on the second side of the cover plate 100 and isolates the connecting portion 211 of the pole 210 from the cover plate 100 .

[0052] At this time, the injection molded part 230 has the function of fixing the pole 210 and isolating the pole 210 and the cover plate 100 to achieve insulation of the cover plate 100; at this time, since the connecting ring 220 in this embodiment can be set as a weak guide ring, the injection molded part 230 can use a double insulating material with relatively weak insulation performance; compared with insulating materials with high insulation performance such as PP material, the cost of double insulating materials is lower, thereby further reducing the cost of the threaded battery end cap in this embodiment. Exemplarily, the double insulating material can be set as a mixed material of PP and PETG.

[0053] Specifically, a buckle groove and a buckle block may be correspondingly provided on the cover plate 100 and the insulating member 300 , respectively, and the connection between the cover plate 100 and the insulating member 300 is achieved by buckling the buckle block into the buckle groove.

[0054] In this embodiment, Figure 3 As shown, in order to further reduce the thickness of the threaded battery end cover in this embodiment, a second recessed platform 103 can be provided on the cover plate 100 and is ringed around the outer periphery of the mounting hole 101. The second recessed platform 103 is connected to the mounting hole 101, and a boss 301 corresponding to the second recessed platform 103 is provided on the insulating member 300. When the pole 210 is installed in the mounting hole 101, the connecting portion 211 of the pole 210 is arranged in the recess of the boss 301.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A threaded battery end cap, comprising a cover plate (100), wherein two pole assemblies (200) are installed in the cover plate (100); characterized in that: The pole assembly (200) comprises: A pole (210) comprising a connecting portion (211) located on a first side of the cover plate (100), and a columnar portion (212) penetrating a mounting hole (101) in the cover plate (100) and extending to a second side of the cover plate (100); a first thread structure is provided on a circumferential surface of the columnar portion (212); A connecting ring (220) having a second thread structure corresponding to the first thread structure disposed therein; when the connecting ring (220) is threadedly connected to the pole (210), the connecting ring (220) is located on the second side of the cover plate (100) and abuts against the cover plate (100); An injection molded part (230) is disposed on the second side of the cover plate (100) and covers the entire outer wall surface of the connecting ring (220) and the outer peripheral surface of the pole (210); A sealing member (240) is arranged between the pole (210) and the cover plate (100) to seal the mounting hole (101).

2. The threaded battery end cap according to claim 1, characterized in that: The end surface of the connecting ring (220) away from the cover plate (100) is provided with a plurality of reinforcement holes (221), and the injection molded part (230) has reinforcement columns (231) formed in the reinforcement holes (221).

3. The threaded battery end cap according to claim 1, characterized in that: The cover plate (100) is also provided with a first sunken platform (102) surrounding the outer circumference of the mounting hole (101), and the first sunken platform (102) is connected to the mounting hole (101); when the connecting ring (220) is threadedly connected to the pole (210), the connecting ring (220) abuts against the bottom of the first sunken platform (102).

4. The threaded battery end cap according to claim 3, characterized in that: The injection molded part (230) has an injection molding step (232) corresponding to the first sink (102).

5. The threaded battery end cap according to claim 1, characterized in that: The sealing member (240) comprises a sealing ring (241), wherein the sealing ring (241) comprises a first ring portion (241a) and a second ring portion (241b) formed by flanging outward from one end of the first ring portion (241a); when the column portion (212) is inserted into the mounting hole (101), the first ring portion (241a) is pressed between the column portion (212) and the mounting hole (101), and the second ring portion (241b) is pressed between the connecting portion (211) and the cover plate (100).

6. The threaded battery end cap according to claim 5, characterized in that: The sealing member (240) further comprises a sealing gasket (242) which is sleeved outside the column portion (212) of the pole (210), and when the connecting ring (220) is threadedly connected to the pole (210), the sealing gasket (242) is pressed between the connecting ring (220) and the cover plate (100).

7. The threaded battery end cap according to claim 1, characterized in that: Also includes: An insulating member (300) is disposed on the second side of the cover plate (100) to isolate the connection portion (211) of the pole (210) from the cover plate (100).

8. The threaded battery end cap according to claim 7, characterized in that: The cover plate (100) is also provided with a second sunken platform (103) surrounding the outer circumference of the mounting hole (101), and the second sunken platform (103) is connected to the mounting hole (101); The insulating member (300) is provided with a boss (301) corresponding to the second sink (103), and the connecting portion (211) of the pole (210) is arranged in a recess of the boss (301).

9. A battery, characterized in that: include: A shell, an electrode assembly and a threaded battery end cap as described in any one of claims 1 to 8, wherein the electrode assembly is arranged in the shell, and the threaded battery end cap covers the opening of the shell; the pole (210) is electrically connected to the electrode assembly.

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