CN217641571U

CN217641571U - Battery cover plate assembly, power battery and vehicle

Info

Publication number: CN217641571U
Application number: CN202221215093.6U
Authority: CN
Inventors: 贺智祺
Original assignee: Gree Altairnano New Energy Inc
Current assignee: Gree Altairnano New Energy Inc
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-10-21
Anticipated expiration: 2032-05-20

Abstract

The utility model provides a battery cover plate subassembly, power battery and vehicle, battery cover plate subassembly includes: the base plate is provided with a pole mounting hole; the fixing ring extends along the circumferential direction of the pole mounting hole; the pole terminal extends into the fixing ring at least partially; the sealing portion, the sealing portion includes a plurality of sealing washers, and a plurality of sealing washers all set up in the fixed ring, and wherein, at least one among a plurality of sealing washers sets up along utmost point post terminal's circumference, and another among a plurality of sealing washers is located between utmost point post terminal's tip and the fixed ring, and adjacent sealing washer has the ground setting apart from among a plurality of sealing washers. Use the technical scheme of the utility model, can not only play the effect of location to utmost point post when battery cover plate subassembly assembly, even long-term use of battery cover plate subassembly or also can guarantee the gas tightness of battery under the service environment of higher temperature moreover.

Description

Battery cover plate assembly, power battery and vehicle

Technical Field

The utility model relates to the technical field of vehicles, particularly, relate to a battery cover plate subassembly, power battery and vehicle.

Background

With the rapid development of lithium batteries, the safety of the batteries is also more and more emphasized by people. The existing extremely-simple cover plate is mostly of an encapsulation riveting structure, although the encapsulation riveting structure has a certain confining force on an electrode terminal, in the long-term use process, plastic used for riveting can be aged, softened and invalid under the conditions of bearing thrust, torsion and high-temperature environment, once encapsulation is softened and invalid, the confining force on the electrode terminal can be weakened, and at the moment, a compressed sealing ring can rebound to cause battery leakage.

As shown in fig. 1, the encapsulation riveting structure is obtained by placing the polarity terminal 30 and the sealing ring 40 in the aluminum spacer 20, riveting the opening of the aluminum spacer 20, so that the polarity terminal 30 and the sealing ring 40 cannot be separated, and then performing integral injection molding, i.e., compressing the sealing ring 40, and simultaneously limiting the shaking of the polarity terminal 30, but in the injection molding process, because the polarity terminal 30 cannot be positioned, there may be a risk of short circuit, and meanwhile, because the sealing ring 40 is pressed against the upper plastic 50, under the use environment of long-term use or higher temperature, there may be a risk of softening the upper plastic, thereby reducing the compression ratio of the sealing ring, and leading to poor air tightness of the battery.

As shown in fig. 2, in the riveting structure with positioning plastic, the sealing ring 40 and the polarity terminal 30 are placed in the aluminum spacer 20, then the insulating plastic 70 is placed, the step of the insulating plastic 70 is matched with the step of the polarity terminal 30, and finally the opening of the aluminum spacer 20 is riveted, so that the opening exerts a force on the insulating plastic 70 to push the polarity terminal 30 to press the sealing ring 40. Although after having added insulating plastic 70, utmost point post can not appear utmost point post and rock the phenomenon that leads to the apron shaping back short circuit at integrative injection moulding's in-process, nevertheless insulating plastic 70 still can appear the condition of softening owing to its material property under long-term use or higher temperature service behavior to lead to the gas tightness of battery relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a battery cover plate subassembly, power battery and vehicle to solve the poor problem of battery gas tightness among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a battery cover plate assembly, including: the base plate is provided with a pole mounting hole; the fixing ring extends along the circumferential direction of the pole mounting hole; the pole terminal extends into the fixing ring; the sealing portion, the sealing portion includes a plurality of sealing washers, and a plurality of sealing washers all set up in the fixed ring, and wherein, at least one among a plurality of sealing washers sets up along utmost point post terminal's circumference, and another among a plurality of sealing washers is located between utmost point post terminal's tip and the fixed ring, and adjacent sealing washer has the ground setting apart from among a plurality of sealing washers.

Further, the structure of at least one of the plurality of seal rings is arranged differently from the structure of the remaining seal rings.

Further, at least one sealing ring in the plurality of sealing rings is provided with a large-diameter end and a small-diameter end, wherein a limiting step matched with the stopping step on the peripheral surface of the pole terminal is formed at the joint of the large-diameter end and the small-diameter end.

Further, a plurality of sealing washers include first sealing washer and second sealing washer, first sealing washer sets up in the fixed ring, first sealing washer sets up along utmost point post terminal's outer peripheral face, the first end of first sealing washer with set up in the last plastic butt in the fixed ring outside, the second sealing washer sets up in the fixed ring, and the second sealing washer is located between the tip of fixed ring's bottom and utmost point post terminal, the second end of first sealing washer sets up apart from ground with the second sealing washer between, so that the second end of first sealing washer, the internal surface of fixed ring, form hollow structure between the surface of second sealing washer and partial utmost point post terminal.

Further, the outer peripheral surface of the second seal ring abuts against the inner surface of the fixed ring.

Further, the outer diameter of the second sealing ring is larger than the diameter of the pole terminal.

According to the utility model discloses another aspect provides a power battery, including the battery cover plate subassembly, the battery cover plate subassembly is above-mentioned battery cover plate subassembly.

According to another aspect of the utility model, a vehicle is provided, including the battery cover plate subassembly, the battery cover plate subassembly is above-mentioned battery cover plate subassembly.

Use the technical scheme of the utility model, battery cover plate subassembly includes a plurality of sealing washers, through setting up a plurality of sealing washers in the solid fixed ring, at least one in a plurality of sealing washers sets up along the circumference of utmost point post terminal, another tip that then is located utmost point post terminal and solid fixed ring between, and set up adjacent sealing washer in with a plurality of sealing washers with apart from ground, can not only play the effect of location to utmost point post when battery cover plate subassembly assembles, and carry out the in-process of riveting to solid fixed ring, can all compress a plurality of sealing washers, nevertheless even one of them sealing washer breaks, all the other sealing washers also can exert a role, and because the sealing washer is high temperature resistant, wear-resisting damage and corrosion-resistant characteristic, even if battery cover plate subassembly uses for a long time or also can guarantee the gas tightness of battery under the service environment of higher temperature.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of a prior art encapsulated riveted structure;

FIG. 2 is a schematic diagram of a riveting structure with positioning plastic in the prior art;

fig. 3 shows a schematic structural diagram of an embodiment of a battery cover plate assembly according to the present invention.

Wherein the figures include the following reference numerals:

10. a substrate; 11. pole mounting holes;

20. a fixing ring;

30. a pole terminal; 31. a stopping step;

40. a sealing part; 41. a first seal ring; 42. a second seal ring;

50. plastic is coated;

60. and (3) a hollow structure.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, and in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same reference numerals are used to designate the same devices, and thus the description thereof will be omitted.

Referring to fig. 3, according to an embodiment of the present application, a battery cover plate assembly is provided.

Specifically, the battery cover plate assembly includes: base plate 10, solid fixed ring 20, utmost point post terminal 30 and sealing 40, base plate 10 has utmost point post mounting hole 11, gu fixed ring 20 extends the setting along utmost point post mounting hole 11's circumference, at least partial utmost point post terminal 30 extends to solid fixed ring 20 in, sealing 40 includes a plurality of sealing washers, a plurality of sealing washers all set up in solid fixed ring 20, wherein, at least one among a plurality of sealing washers sets up along utmost point post terminal 30's circumference, another among a plurality of sealing washers is located between utmost point post terminal 30's tip and solid fixed ring 20, and adjacent sealing washer has the ground setting apart from in a plurality of sealing washers.

By applying the technical scheme of the embodiment, the battery cover plate assembly comprises a plurality of sealing rings, the plurality of sealing rings are arranged in the fixing ring 20, at least one of the plurality of sealing rings is arranged along the circumferential direction of the pole terminal 30, the other sealing ring is arranged between the end part of the pole terminal 30 and the fixing ring 20, and the adjacent sealing rings in the plurality of sealing rings are arranged at a distance, so that not only can the pole be positioned when the battery cover plate assembly is assembled, but also the plurality of sealing rings can be compressed in the process of riveting the fixing ring 20, and the rest sealing rings can also play a role even if one of the sealing rings is broken, and due to the characteristics of high temperature resistance, wear resistance and corrosion resistance of the sealing rings, the battery cover plate assembly can also ensure the air tightness of the battery even if being used for a long time or in a high-temperature use environment.

At least one of the plurality of seal rings is configured differently from the remaining seal rings. Further, at least one of the plurality of seal rings has a large diameter end and a small diameter end, wherein a connecting portion of the large diameter end and the small diameter end forms a limit step matched with the stop step 31 on the outer peripheral surface of the pole terminal 30. In this embodiment, the positioning of the terminal post can be ensured when the battery cover plate assembly is assembled.

The plurality of seal rings include a first seal ring 41 and a second seal ring 42, the first seal ring 41 is disposed in the fixing ring 20, the first seal ring 41 is disposed along the outer peripheral surface of the pole terminal 30, a first end of the first seal ring 41 abuts against an upper plastic 50 disposed outside the fixing ring 20, the second seal ring 42 is disposed in the fixing ring 20, the second seal ring 42 is disposed between the bottom of the fixing ring 20 and the end of the pole terminal 30, a distance is provided between a second end of the first seal ring 41 and the second seal ring 42, so that a second end of the first seal ring 41, the inner surface of the fixing ring 20, and a hollow structure 60 is formed between the second seal ring 42 and the outer surface of part of the pole terminal 30. The arrangement is carried out the riveting process to the fixed ring 20, the first sealing ring 41 and the second sealing ring 42 are compressed, even if the first sealing ring 41 is broken, the second sealing ring 42 still can play a sealing role, even if the pole post outer encapsulation is softened, the polar terminal still can be subjected to the confining force, and therefore the use of the battery cannot be influenced.

The outer peripheral surface of the second seal ring 42 abuts against the inner surface of the fixed ring 20. Further, the outer diameter of the second seal ring 42 is larger than the diameter of the pole terminal 30. Because second sealing washer 42 compares in location plastic, outsourcing glue more wear-resisting, the more ageing resistance's characteristic, under the long-term condition of using of battery cover plate subassembly, second sealing washer 42 also can not soften easily to make battery cover plate subassembly comparatively firm in the use, further guaranteed the gas tightness of battery, reduced the risk of battery weeping.

In another embodiment of the present application, the first sealing ring 41 and the second sealing ring 42 may also be in other forms, wherein the first sealing ring 41 and the second sealing ring 42 may be of the same structure.

According to another specific embodiment of the application, a power battery is also provided, and the power battery comprises a battery cover plate assembly, and the battery cover plate assembly is the battery cover plate assembly in the above embodiment. The battery cover plate assembly in the embodiment realizes the technical effect of ensuring the air tightness of the battery in long-term use or a higher-temperature use environment, so that the power battery adopting the battery cover plate assembly in the embodiment also has the characteristic of good air tightness, and the safety performance of the power battery is improved.

According to another specific embodiment of this application, still provide a vehicle, including battery cover plate assembly, battery cover plate assembly is the battery cover plate assembly in above-mentioned embodiment. Because the technical effect that the air tightness of the battery can be ensured even in long-term use or in a high-temperature use environment is realized by the battery cover plate assembly in the embodiment, the reliability of the vehicle is also improved by applying the battery cover plate assembly in the embodiment to the vehicle.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

adopt the battery cover plate subassembly of this application structure, even under the soft condition of the outer rubber coating of utmost point post, the polarity terminal still can receive the confinement power and not influence the use of battery, under battery cover plate subassembly is in abominable or extreme environment of using, still can guarantee the gas tightness of battery.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cover plate assembly, comprising:

a substrate (10), the substrate (10) having a post mounting hole (11);

the fixing ring (20) extends along the circumferential direction of the pole mounting hole (11);

a pole terminal (30), at least part of the pole terminal (30) extending into the fixing ring (20);

sealing portion (40), sealing portion (40) include a plurality of sealing washers, and is a plurality of the sealing washer all set up in gu fixed ring (20), wherein, it is a plurality of at least one in the sealing washer is followed utmost point post terminal (30)'s circumference sets up, and is a plurality of another one in the sealing washer is located utmost point post terminal (30) the tip with gu between fixed ring (20), and a plurality of adjacent in the sealing washer has the ground of distance to set up.

2. The battery cover plate assembly of claim 1, wherein the structure of at least one of said seal rings is arranged differently from the structure of the remaining seal rings.

3. The battery cover plate assembly according to claim 1 or 2, wherein at least one of the plurality of sealing rings has a large diameter end and a small diameter end, wherein a junction of the large diameter end and the small diameter end forms a limit step which is matched with a stop step (31) on the outer peripheral surface of the pole terminal (30).

4. The battery cover plate assembly according to claim 1, wherein the plurality of sealing rings include a first sealing ring (41) and a second sealing ring (42), the first sealing ring (41) is disposed in the fixing ring (20), the first sealing ring (41) is disposed along an outer circumferential surface of the terminal post (30), a first end of the first sealing ring (41) abuts against an upper plastic (50) disposed outside the fixing ring (20), the second sealing ring (42) is disposed in the fixing ring (20), the second sealing ring (42) is disposed between a bottom of the fixing ring (20) and an end of the terminal post (30), a second end of the first sealing ring (41) and the second sealing ring (42) are disposed with a distance therebetween, so that a hollow structure (60) is enclosed between a second end of the first sealing ring (41), an inner surface of the fixing ring (20), the second sealing ring (42) and a part of an outer surface of the terminal post (30).

5. The battery cover plate assembly according to claim 4, wherein an outer circumferential surface of the second seal ring (42) abuts an inner surface of the fixing ring (20).

6. The battery cover plate assembly of claim 4, wherein the outer diameter of the second sealing ring (42) is larger than the diameter of the pole terminal (30).

7. A power battery, comprising a battery cover plate component, wherein the battery cover plate component is the battery cover plate component in any one of claims 1 to 6.

8. A vehicle comprising a battery cover plate assembly, wherein the battery cover plate assembly is as claimed in any one of claims 1 to 6.