Battery cover plate

Abstract

The utility model relates to a battery cover plate, which comprises a base plate mechanism, a battery cover plate mechanism, a battery cover plate mechanism, a battery cover plate mechanism, a battery cover plate mechanism, a battery cover plate mechanism and a battery cover plate mechanism, and is characterized in that the base plate mechanism comprises a base plate, an explosion-proof opening, a first liquid injection opening and a plurality of first pole holes; the stop mechanism comprises a bottom plate, a second liquid injection port, a plurality of second pole holes and a stop structure; the bottom plate is in contact with the surface of the substrate; the second liquid injection port is formed in the bottom plate and corresponds to the first liquid injection port; the plurality of second pole holes are formed in the bottom plate and correspond to the first pole holes; the surface of the bottom plate is provided with a first convex ring which surrounds the periphery of each second pole hole and is matched with the first pole hole; the plurality of pole columns are arranged in the second pole column holes in a one-to-one correspondence manner and are supported on the first convex rings; the plurality of metal rings are fixed on the substrate and are sleeved outside the pole columns in a one-to-one correspondence manner; a plurality of insulating parts, wherein each insulating part is formed between the metal ring and the corresponding pole; and the explosion-proof valve is fixed at the position of the explosion-proof opening. Therefore, the metal ring and the pole can be separated by the insulating part; meanwhile, the pole is arranged on the base plate and the bottom plate in a penetrating mode and can be used in cooperation with other accessories, existing mass production equipment tools do not need to be changed, and cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries and relates to a battery cover plate, in particular to a battery cover plate with a simple structure and low cost. Background Art

[0002] Power batteries are power sources for tools, mostly referring to batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries are the core components of new energy vehicles and an important direction for future energy transformation. Power lithium batteries (i.e. lithium power batteries) are new high-energy batteries successfully developed in the 20th century. Due to their high energy, high battery voltage, wide operating temperature range, and long storage life, they have been widely used in military and civilian small electrical appliances, such as mobile phones, portable computers, camcorders, and cameras; in addition, large-capacity lithium batteries have been widely used in electric vehicles and have become one of the main power sources for electric vehicles in the 21st century. Lithium power batteries usually have two shapes: cylindrical and rectangular.

[0003] The Chinese utility model patent with application number 202321756226.5 discloses a battery top cover, including a pole assembly and a cover plate, the cover plate is penetrated to form a pole hole for installing the pole assembly, the pole hole includes a perforation, a bottom wall formed at the periphery of the perforation, and a side wall protruding upward from the periphery of the bottom wall, the side wall is folded inward to form a flange pressed on the covering body, and the clamping ring body is clamped between the fixing ring and the bottom wall. Although the battery top cover does not need to be molded, it contains complex structures such as pole assemblies and pole holes, requires complex preparation and assembly processes, and still has a high cost. Summary of the invention

[0004] The utility model aims to provide a battery cover plate, so that the pole can be used in conjunction with a flat connecting piece, without having to modify the existing mass production equipment and tooling, thereby greatly reducing the cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a battery cover, which includes:

[0006] A substrate mechanism, the substrate mechanism comprising a substrate and an explosion-proof opening, a first liquid injection port and a plurality of first pole holes provided on the substrate;

[0007] A stop mechanism, the stop mechanism comprising a bottom plate in contact with the surface of the substrate, a second liquid injection port provided on the bottom plate and corresponding to the first liquid injection port, a plurality of second pole holes provided on the bottom plate and corresponding to the first pole holes, and a stop structure formed on the bottom plate; a first convex ring is formed on the surface of the bottom plate and surrounds each of the second pole holes and matches the first pole holes;

[0008] A plurality of poles, each of which is disposed in the second pole hole in a one-to-one correspondence and supported on the first convex ring;

[0009] A plurality of metal rings, the metal rings are fixed on the substrate and sleeved outside the poles one by one;

[0010] A plurality of insulating members, each of the insulating members being formed between the metal ring and the corresponding pole;

[0011] An explosion-proof valve is fixed at the explosion-proof port.

[0012] Optimally, it further comprises a sealing ring, which is located between the substrate and the pole and is sleeved outside the first convex ring.

[0013] Furthermore, the insulating member is formed on the pole by injection molding, and the metal ring is welded on the substrate.

[0014] Further, each of the poles comprises a first flat cylinder, a second flat cylinder formed on any surface of the first flat cylinder and matched with the first convex ring, and a third flat cylinder formed on the other surface of the first flat cylinder, and the end surface area of ​​the first flat cylinder is greater than the end surface area of ​​the second flat cylinder and the end surface area of ​​the third flat cylinder;

[0015] Furthermore, the free end of the third flat cylinder is provided with an inwardly recessed countersunk hole.

[0016] Furthermore, each of the first pole holes includes a receiving groove which is opened on the substrate and recessed inwardly, and a through hole which is located in the receiving groove and penetrates the substrate, and the receiving groove is formed on a surface of the substrate which is away from the bottom plate.

[0017] Furthermore, each of the first pole holes further includes a sinking groove which is opened on the substrate and connected to the accommodating groove, and the sinking groove is located on the outer circle of the accommodating groove.

[0018] Furthermore, each of the metal rings includes a ring body, a supporting ring body formed on one end surface of the ring body and fixed in the accommodating groove, and a clamping ring body formed on the other end surface of the ring body and extending toward the pole;

[0019] Each of the insulating parts includes a first ring body sleeved on the third flat cylinder and matched with the snap ring body, a second ring body abutting against the inner wall of the ring body and the supporting ring body and contacting the circumference of the first flat cylinder, and a third ring body connecting the first ring body and the second ring body.

[0020] Optimally, the stop structure includes two convex strips formed at the edge of the outer surface of the bottom plate, convex blocks formed at both ends of each convex strip, and a limiting convex block formed on the surface of the bottom plate and located between the two convex blocks.

[0021] Furthermore, an arc-shaped connecting groove is formed between the limiting protrusion and the protrusion, and the limiting protrusion has at least one stopping groove recessed outward from the inner surface.

[0022] Due to the application of the above technical scheme, the utility model has the following advantages compared with the prior art: the battery cover of the utility model, by adopting a substrate mechanism, a stop mechanism, a pole, a metal ring and an insulating member of a specific structure for coordination, can utilize the insulating member to separate the metal ring and the pole; at the same time, the pole is passed through the substrate and the bottom plate, and can be used in conjunction with other auxiliary parts (such as flat sheet connecting pieces, etc.), without having to change the existing mass production equipment tooling, thereby greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0024] Figure 1 This is an exploded view of the battery cover of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the battery cover of the utility model;

[0026] Figure 3 This is a bottom view of the battery cover of the utility model;

[0027] Figure 4 for Figure 3 AA section view. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1 to 4 The battery cover mainly includes a stopper mechanism 1, a base plate mechanism 2, a metal ring 3, a pole 5, an insulating member 6 and other structures.

[0032] Among them, the substrate mechanism 2 includes a substrate 21 and an explosion-proof port 22, a first liquid injection port 20 and a plurality of first pole holes 23 opened on the substrate 21. Specifically, the positions of the explosion-proof port 22, the first liquid injection port 20 and the first pole hole 23 are not limited, as long as the corresponding functions can be realized, and can be set accordingly according to actual needs. In this embodiment, the explosion-proof port 22 is located at the center of the substrate 21; the number of the first pole holes 23 is determined according to the number of poles 5, so that the first pole holes 23 and the poles 5 need to correspond one to one to achieve matching, preferably two (can be selected according to the actual battery cover structure design, such as some special-shaped battery covers may have three, four or even more poles 5), which are respectively located at the two ends of the substrate 21 to serve as the positive pole hole and the negative pole hole respectively (the number of the metal ring 3, the insulating member 6 and the second pole hole 12 described later is also consistent with the number of poles 5, the principle is the same as above); the first liquid injection port 20 is located in the middle of the substrate 21 and is adjacent to the explosion-proof port 22 and is arranged at intervals.

[0033] The stopper mechanism 1 comprises a bottom plate 11 in contact with the surface of the substrate 21, a second liquid injection port 10 provided on the bottom plate 11 and corresponding to the first liquid injection port 20, a plurality of second pole holes 12 provided on the bottom plate 11 and corresponding to the first pole holes 23, and a stopper structure formed on the bottom plate 11. The side of the battery cover facing away from the battery housing when in use is defined as the outer side, and the side inserted into the battery housing is defined as the inner side. Figure 1 The upper side and the lower side observed in the figure correspond to each other, that is, the substrate mechanism 2 is located outside (upper side) of the stop mechanism 1, so the upper surface of the bottom plate 11 contacts the lower surface of the substrate 21. Figure 4It can be seen that the first liquid injection port 20 and the second liquid injection port 10 form a complete liquid injection port; there are also two second pole holes 12, and one second pole hole 12 and one first pole hole 23 form a complete pole hole. In this embodiment, a first convex ring 13 is formed on the surface of the bottom plate 11, which is arranged around each second pole hole 12 and matches the first pole hole 23; that is, the first convex ring 13 is located on the upper surface of the bottom plate 11 and surrounds the edge of the second pole hole 12. When the stop mechanism 1 and the base plate mechanism 2 are assembled together, the first convex ring 13 just penetrates the first pole hole 23, so that when the pole 5 is installed at the second pole hole 12, the first convex ring 13 can play a certain supporting and limiting role on the pole 5. The stop structure is usually designed according to the structure of the battery shell, and the existing conventional one can be adopted.

[0034] There are multiple poles 5, and the specific number is selected according to the structural design of the battery cover. In this embodiment, the most common two poles are used. Each pole 5 is arranged in the second pole hole 12 in a one-to-one correspondence and supported on the first convex ring 13 (part of the protruding structure is supported by the first convex ring 13). The number of metal rings 3 is consistent with the number of poles 5. They are fixed on the substrate 21 and are sleeved on the outside of the pole 5 in a one-to-one correspondence; the fixing method adopts the existing conventional method, such as welding, etc. The number of insulating members 6 is also consistent with the number of poles 5, and each insulating member 6 is formed between the metal ring 3 and the corresponding pole 5 to separate the corresponding metal ring 3 and pole 5; the insulating member 6 can be assembled between the metal ring 3 and the pole 5 in a detachable manner, but it is more preferably formed integrally on the pole 5 by injection molding. At this time, the upper and lower end faces of the pole 5 do not need to be designed with complex structures, and the conventional plane can be maintained. It can be used with other auxiliary parts (such as flat sheet connecting pieces, etc.), and there is no need to change the existing mass production equipment tooling, which greatly reduces the cost.

[0035] In this embodiment, each pole 5 includes a first flat cylinder 51, a second flat cylinder 52 formed on any surface (lower surface) of the first flat cylinder 51 and matched with the first convex ring 13, and a third flat cylinder 53 formed on the other surface (upper surface) of the first flat cylinder 51 (they are usually integrally formed to reduce resistance, and the above-mentioned cylinder is not limited to a cylindrical body, and any existing cylinder structure can also be used according to actual needs); the end surface area of ​​the first flat cylinder 51 is larger than the end surface area of ​​the second flat cylinder 52 and the end surface area of ​​the third flat cylinder 53 (that is, the end surface area of ​​the first flat cylinder 51 is larger than the end surface area of ​​the third flat cylinder 53). The end surface area of ​​the second flat cylinder 52 is also greater than the end surface area of ​​the third flat cylinder 53; the end surface area of ​​the second flat cylinder 52 and the end surface area of ​​the third flat cylinder 53 are usually not limited and can be selected according to actual conditions. In this embodiment, the end surface area of ​​the third flat cylinder 53 is greater than the end surface area of ​​the second flat cylinder 52, which is conducive to simplifying the structure of the metal ring 3 and the insulating member 6). In this way, the circumferential surface of the first flat cylinder 51 protrudes from the second flat cylinder 52 and the third flat cylinder 53, so that a double step structure is formed on the circumferential surface of the pole 5 to cooperate with the first convex ring 13, the insulating member 6, etc. (see Figure 4 A countersunk hole 54 which is recessed inwards is formed at the free end (ie, the upper end, usually at the center of the upper end) of the third flat cylinder 53 .

[0036] In this embodiment, each first pole hole 23 includes a receiving groove 231 which is provided on the substrate 21 and is recessed inward, and a through hole 232 which is located in the receiving groove 231 and penetrates the substrate 21. The receiving groove 231 is formed on the surface (i.e., the upper surface) of the substrate 21 which is away from the bottom plate 11. In this way, when the pole 5 is assembled with the stop mechanism 1 and the substrate mechanism 2, the receiving groove 231 can be used to limit the metal ring 3 and the pole 5, which is conducive to improving the compactness of the structure of the entire battery cover. Each first pole hole 23 can also include a sink 233 which is provided on the substrate 21 and connected to the receiving groove 231 (the sink 233 is also provided on the upper surface of the substrate 21), and the sink 233 is located on the outer circle of the receiving groove 231. Other assembly components can be arranged in the sink 233 to further improve the assembly tightness or firmness of the battery cover.

[0037] In the present embodiment, the metal ring 3 and the insulating member 6 are also designed with corresponding structures according to the structure of the pole 5. Specifically, each metal ring 3 includes a ring body 31, a support ring body 32 formed on one end face (lower end face) of the ring body 31 and fixed in the accommodating groove 231, and a snap-on ring body 33 formed on the other end face (upper end face) of the ring body 31 and extending toward the pole 5; each insulating member 6 includes a first ring body 63 sleeved on the third flat cylinder 53 and matched with the snap-on ring body 33, a second ring body 62 resting on the inner wall of the ring body 31 and the support ring body 32 and in contact with the circumference of the first flat cylinder 51, and a third ring body 61 connecting the first ring body 63 and the second ring body 62. Since the insulating member 6 is injection molded on the pole 5 and the metal ring 3 is fixed on the substrate 21, the structure of the metal ring 3 and the insulating member 6 can be snap-fitted so that the pole 5 is fastened to the stop mechanism 1 and the substrate mechanism 2 (such as Figures 2 to 4 ).

[0038] In this embodiment, the battery cover also includes a sealing ring 4, which is located between the substrate 21 and the pole 5 and is sleeved outside the first convex ring 13. At this time, the sealing ring 4 is located in the accommodating groove 231 and contacts the lower end surface of the first flat cylinder 51, and the outer peripheral surface of the sealing ring 4 contacts the inner wall of the second ring body 62. In this way, not only can the sealing between the substrate mechanism 2 and the pole 5 be achieved, but also the substrate mechanism 2 and the pole 5 can be isolated to play a certain insulating role.

[0039] In this embodiment, the battery cover also includes an explosion-proof valve 7, which is fixed at the explosion-proof opening 22 (the fixing method adopts the existing conventional method, which can be a one-piece molding and then scored or stamped to obtain a scratch, or can be welded, etc.). An explosion-proof structure is provided in the middle of the stopper mechanism 1, which is not the invention of this application and can adopt the existing conventional method.

[0040] However, the stopping structure includes two convex strips 14 formed (usually integrated, the same below) at the edge of the outer surface of the bottom plate 11, protrusions 15 formed at both ends of each convex strip 14, and a limiting protrusion 16 formed on the surface (i.e., the lower surface) of the bottom plate 11 and located between the two protrusions 15; an arc-shaped connecting groove 17 is formed between the limiting protrusion 16 and the protrusion 15, and the limiting protrusion 16 has at least one stopping groove 161 recessed outward from the inner surface, so that the battery cover and the battery housing can be positioned and installed by using the stopping structure to obtain a complete power battery unit.

[0041] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery cover, characterized in that it include: A substrate structure (2), the substrate structure (2) comprising a substrate (21), an explosion-proof opening (22), a first liquid injection opening (20), and a plurality of first pole holes (23) provided on the substrate (21); A stop mechanism (1), the stop mechanism (1) comprising a bottom plate (11) in contact with the surface of the substrate (21), a second liquid injection port (10) provided on the bottom plate (11) and corresponding to the first liquid injection port (20), a plurality of second pole holes (12) provided on the bottom plate (11) and corresponding to the first pole holes (23), and a stop structure formed on the bottom plate (11); a first convex ring (13) is formed on the surface of the bottom plate (11) and is arranged around each of the second pole holes (12) and matches the first pole holes (23); A plurality of poles (5), the poles (5) being arranged in a one-to-one correspondence in the second pole holes (12) and supported on the first convex ring (13); A plurality of metal rings (3), the metal rings (3) being fixed on the substrate (21) and sleeved outside the poles (5) in a one-to-one correspondence; A plurality of insulating members (6), each of the insulating members (6) being formed between the metal ring (3) and the corresponding pole (5); An explosion-proof valve (7), wherein the explosion-proof valve (7) is fixed at the explosion-proof opening (22).

2. The battery cover according to claim 1, characterized in that: It also comprises a sealing ring (4), wherein the sealing ring (4) is located between the base plate (21) and the pole (5) and is sleeved outside the first convex ring (13).

3. The battery cover according to claim 1 or 2, characterized in that: The insulating member (6) is formed on the pole (5) by injection molding, and the metal ring (3) is welded on the substrate (21).

4. The battery cover according to claim 1 or 2, characterized in that: Each of the poles (5) comprises a first flat column (51), a second flat column (52) formed on any surface of the first flat column (51) and matched with the first convex ring (13), and a third flat column (53) formed on the other surface of the first flat column (51), wherein the end surface area of ​​the first flat column (51) is greater than the end surface area of ​​the second flat column (52) and the end surface area of ​​the third flat column (53).

5. The battery cover according to claim 4, characterized in that: The free end of the third flat cylinder (53) is provided with an inwardly recessed countersunk hole (54).

6. The battery cover according to claim 4, characterized in that: Each of the first pole holes (23) comprises a receiving groove (231) formed on the substrate (21) and recessed inwardly, and a through hole (232) located in the receiving groove (231) and penetrating the substrate (21); the receiving groove (231) is formed on a surface of the substrate (21) facing away from the bottom plate (11).

7. The battery cover according to claim 6, characterized in that: Each of the first pole holes (23) further comprises a sink groove (233) opened on the substrate (21) and connected to the accommodating groove (231), wherein the sink groove (233) is located on the outer circle of the accommodating groove (231).

8. The battery cover according to claim 6, characterized in that: Each of the metal rings (3) comprises a ring body (31), a supporting ring body (32) formed on one end surface of the ring body (31) and fixed in the accommodating groove (231), and a clamping ring body (33) formed on the other end surface of the ring body (31) and extending toward the pole (5); Each of the insulating members (6) comprises a first ring body (63) sleeved on the third flat column (53) and matched with the snap ring body (33), a second ring body (62) abutting against the inner walls of the ring body (31) and the supporting ring body (32) and in contact with the circumferential surface of the first flat column (51), and a third ring body (61) connecting the first ring body (63) and the second ring body (62).

9. The battery cover according to claim 1, characterized in that: The stop structure comprises two convex strips (14) formed at the edge of the outer surface of the bottom plate (11), convex blocks (15) formed at both ends of each convex strip (14), and a limiting convex block (16) formed on the surface of the bottom plate (11) and located between the two convex blocks (15).

10. The battery cover according to claim 9, characterized in that: An arc-shaped connecting groove (17) is formed between the limiting protrusion (16) and the protrusion (15), and the limiting protrusion (16) has at least one stop groove (161) recessed outward from the inner surface.

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