CN214542473U

CN214542473U - Plastic liquid injection structure under power battery top cover and power battery top cover

Info

Publication number: CN214542473U
Application number: CN202120970718.9U
Authority: CN
Inventors: 李新宏; 钟军; 陈洪亮; 邓银桥; 陈圣; 周斌
Original assignee: Chizhou Junz Technology Co ltd
Current assignee: Chizhou Junz Technology Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-10-29
Anticipated expiration: 2031-05-08

Abstract

The utility model discloses a plastic liquid injection structure under a power battery top cover and a power battery top cover, which comprises a plastic plate body, wherein the plastic plate body is provided with a liquid injection hole, and the bottom of the liquid injection hole is provided with a baffle plate component; the baffle component comprises a connecting part extending along a first direction from the lower edge of the liquid injection hole, one end of the connecting part, which is far away from the plastic plate body, is connected with a baffle part, and a first clearance channel for injecting liquid is formed between the baffle part and the plastic plate body; wherein the first direction is the face of perpendicular to plastic board body direction down. During liquid injection, the liquid injection port of the liquid injection device is aligned to the liquid injection hole for liquid injection, and electrolyte with certain pressure directly impacts the baffle part and flows into the battery along the first clearance channel; baffle portion plays the cushioning effect to electrolyte to through the guide effect of first clearance passageway, make electrolyte flow into in the battery from the lateral part of battery apron, avoided electrolyte direct impact battery electricity core, cause the problem that the diaphragm drops.

Description

Plastic liquid injection structure under power battery top cover and power battery top cover

Technical Field

The utility model relates to a power battery technical field especially relates to a plastic annotates liquid structure and power battery top cap under power battery top cap.

Background

With the increasing development of new energy industry, the research and development of a power battery as a key component of the new energy industry are also more and more widely concerned; the power battery has the advantages of light weight, high capacity, long service life, low self-discharge rate, no memory effect, no pollution and the like, and particularly, the power battery is widely applied to equipment such as electric bicycles, electric hardware tools and the like, and the application of the power battery in the equipment has advantages.

Annotate liquid through annotating the liquid pore pair electricity core on the plastic board down among the prior art, its shortcoming is: the conventional liquid injection hole is single in structure, liquid can penetrate directly along the direction of the liquid injection hole during liquid injection, and the generated pressure can directly act on the battery cell structure, so that the anode/cathode is attached to a material and a diaphragm on the diaphragm, and the electrolyte can be broken or broken by the electrolyte with increased pressure, so that the battery cell is NG or scrapped.

In view of this, it is necessary to improve the liquid injection structure in the prior art to solve the technical problem of diaphragm falling caused by excessive pressure during liquid injection.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plastic annotates liquid structure and power battery top cap under power battery top cap solves above technical problem.

To achieve the purpose, the utility model adopts the following technical proposal:

a plastic liquid injection structure under a top cover of a power battery comprises a plastic plate body, wherein a liquid injection hole is formed in the plastic plate body, and a baffle plate assembly is arranged at the bottom of the liquid injection hole;

the baffle assembly comprises a connecting part extending from the lower edge of the liquid injection hole along a first direction, one end, far away from the plastic plate body, of the connecting part is connected with a baffle part, and a first clearance channel for injecting liquid is formed between the baffle part and the plastic plate body; wherein the first direction is perpendicular to the face of the plastic board body is towards the bottom.

Optionally, the baffle part includes a first baffle and a second baffle, the number of the second baffles is even, and the even second baffles are respectively and symmetrically arranged on two sides of the first baffle;

the first baffle and the second baffle are arranged in a stepped mode, and a second gap channel for liquid injection is formed between the first baffle and the second baffle.

Optionally, the number of the second baffles is two, and the two second baffles are symmetrically arranged on two sides of the first baffle respectively.

Optionally, the first baffle and the second baffle are arranged along a direction parallel to the surface of the plastic board body.

Optionally, the baffle plate assembly and the plastic plate body are integrally formed.

Optionally, the hole wall of the liquid injection hole is provided with an internal thread, and the connecting part is in threaded connection with the liquid injection hole.

Optionally, the plastic board body both sides symmetry is provided with one annotate the liquid hole, the quantity of baffle subassembly is two, two the baffle subassembly sets up respectively on the notes liquid hole that corresponds.

The utility model also provides a power battery top cap, include as above power battery top cap down plastic annotate the liquid structure.

Compared with the prior art, the utility model discloses following beneficial effect has: during liquid injection, the liquid injection port of the liquid injection device is aligned to the liquid injection hole for liquid injection, and electrolyte with certain pressure directly impacts the baffle part and flows into the battery along the first clearance channel; baffle portion plays the cushioning effect to electrolyte to through the guide effect of first clearance passageway, make electrolyte flow into in the battery from the lateral part of battery apron, avoided electrolyte direct impact battery electricity core, cause the problem that the diaphragm drops.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose.

FIG. 1 is an overall schematic view of a plastic injection structure under a top cover of a power battery;

FIG. 2 is a schematic view of a bottom view of a plastic injection structure under a top cover of a power battery;

FIG. 3 is a schematic diagram of an oblique view of the bottom of a plastic liquid injection structure under a top cover of a power battery;

FIG. 4 is a second schematic diagram of an oblique bottom view of a plastic liquid injection structure under a top cover of a power battery;

FIG. 5 is a third schematic diagram of a bottom-side oblique view structure of a plastic liquid injection structure under a top cover of a power battery;

fig. 6 is a schematic diagram of a baffle assembly of a plastic liquid injection structure under a top cover of a power battery.

Illustration of the drawings: the plastic plate comprises a plastic plate body 1, a liquid injection hole 2, a baffle plate assembly 3, a connecting part 31, a baffle plate part 32, a first gap channel 4, a first baffle plate 321, a second baffle plate 322 and a second gap channel 5.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The first embodiment is as follows:

a plastic liquid injection structure under a top cover of a power battery comprises a plastic plate body 1, wherein a liquid injection hole 2 is formed in the plastic plate body 1, and a baffle plate assembly 3 is arranged at the bottom of the liquid injection hole 2;

the baffle plate component 3 comprises a connecting part 31 extending from the lower edge of the liquid injection hole 2 along a first direction, one end of the connecting part 31 far away from the plastic plate body 1 is connected with a baffle plate part 32, and a first clearance channel 4 for injecting liquid is formed between the baffle plate part 32 and the plastic plate body 1; wherein the first direction is perpendicular to the direction that the face of the plastic board body 1 is downward.

The utility model discloses a theory of operation does: during liquid injection, a liquid injection port of the liquid injection device is aligned with the liquid injection hole 2 for liquid injection, and electrolyte with certain pressure directly impacts the baffle part 32 and flows into the battery along the first clearance channel 4; baffle portion 32 plays the cushioning effect to electrolyte to through the guide effect of first clearance passageway 4, make electrolyte flow into in the battery from the lateral part of battery apron, avoided electrolyte direct impact battery electricity core, cause the problem that the diaphragm drops.

In this embodiment, the baffle portion 32 includes a first baffle 321 and a second baffle 322, the number of the second baffles 322 is an even number, and the even number of the second baffles 322 are respectively and symmetrically arranged at two sides of the first baffle 321;

the first baffle 321 and the second baffle 322 are arranged in a stepped manner, and a second clearance channel 5 for liquid injection is formed between the first baffle 321 and the second baffle 322. With reference to fig. 3, the first baffle 321 is disposed below the second baffle 322, and the first baffle 321 and the second baffle 322 have a height difference, so that the second gap channel 5 is formed between the first baffle 321 and the second baffle 322, during liquid injection, the first baffle 321 and the second baffle 322 buffer the electrolyte, and guide the electrolyte to flow out from the first gap channel 4 and the second gap channel 5, so as to perform double buffering and pressure reduction, and achieve a better buffering effect.

Specifically, the number of the second baffles 322 is two, and the two second baffles 322 are symmetrically disposed on two sides of the first baffle 321, respectively.

Further, the first baffle 321 and the second baffle 322 are both disposed along a direction parallel to the surface of the plastic board body 1. The first baffle 321 and the second baffle 322 are preferably arranged in parallel, and similarly, the first baffle 321 and the second baffle 322 can also be inclined at a preset angle, so that the electrolyte can be guided and shunted and flows out from multiple directions, and liquid backflow is avoided.

As a preferred item of this embodiment, the baffle plate assembly 3 and the plastic plate body 1 are integrally formed. When the plastic plate is injection molded, the baffle plate assembly 3 and the plastic plate body 1 are integrally molded in an injection mold, and then a finished product is taken out.

Optionally, the hole wall of the liquid injection hole 2 is provided with an internal thread, and the connecting part 31 is screwed to the liquid injection hole 2. Through the mode of combination assembly, make baffle subassembly 3 with plastic board body 1 is connected to the drawing die degree of difficulty when reducing injection moulding.

As a preferred item of this embodiment, two sides of the plastic board body 1 are symmetrically provided with one liquid injection hole 2, the number of the baffle assemblies 3 is two, and the two baffle assemblies 3 are respectively disposed on the corresponding liquid injection holes 2. The positive and negative electrodes of the plastic plate are symmetrically distributed, so that the problem of reverse assembly during production due to the fact that the plastic needs to distinguish the directions of the positive and negative electrodes is solved.

Example two:

the utility model also provides a power battery top cap, include as embodiment one the power battery top cap down plastic annotate the liquid structure.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A plastic liquid injection structure under a top cover of a power battery is characterized by comprising a plastic plate body, wherein a liquid injection hole is formed in the plastic plate body, and a baffle plate assembly is arranged at the bottom of the liquid injection hole;

2. The plastic liquid injection structure under the top cover of the power battery as claimed in claim 1, wherein the baffle portion comprises a first baffle and a second baffle, the number of the second baffles is even, and the even second baffles are symmetrically arranged at two sides of the first baffle respectively;

3. The plastic liquid injection structure under power battery top cap according to claim 2, wherein the number of the second baffles is two, and the two second baffles are symmetrically disposed on two sides of the first baffle respectively.

4. The plastic liquid injection structure under power battery top cover according to claim 3, wherein the first baffle and the second baffle are both disposed along a direction parallel to the plate surface of the plastic plate body.

5. The plastic liquid injection structure under power battery top cover according to claim 1, wherein the baffle assembly is integrally formed with the plastic plate body.

6. The plastic liquid injection structure under power battery top cover according to claim 1, characterized in that the hole wall of the liquid injection hole is provided with an internal thread, and the connecting part is connected to the liquid injection hole in a threaded manner.

7. The plastic liquid injection structure under the top cover of the power battery as claimed in claim 1, wherein two sides of the plastic plate body are symmetrically provided with one liquid injection hole, and the number of the baffle assemblies is two, and the two baffle assemblies are respectively disposed on the corresponding liquid injection holes.

8. A power battery top cover, characterized by comprising the power battery top cover lower plastic liquid injection structure according to any one of claims 1 to 7.