CN218182440U

CN218182440U - Battery filling cup set

Info

Publication number: CN218182440U
Application number: CN202222399041.5U
Authority: CN
Inventors: 常海涛; 瞿艳; 陈娟
Original assignee: Fujian Nanping Nanfu Battery Co Ltd
Current assignee: Fujian Nanping Nanfu Battery Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-12-30
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses a battery liquid injection sleeve cup, which comprises an annular cylinder body; any end of the annular cylinder is a battery shell connecting end; a partition plate is arranged in the annular cylinder body, and the inner cavity of the annular cylinder body is divided into an upper cavity and a lower cavity by the partition plate; the partition board is connected with an electrolyte liquid guide pipe, one end of the electrolyte liquid guide pipe is communicated with the upper cavity, and the other end of the electrolyte liquid guide pipe is inserted into the battery shell end. The utility model discloses a battery annotates liquid retainer cup the epicoele can keep in electrolyte to can be with electrolyte water conservancy diversion to battery shell in through the electrolyte catheter, annotate the liquid and do not receive battery case to exceed the restriction of the space size of rolling up the core, provide the condition for the filling space that improves battery electricity core.

Description

Battery filling cup set

Technical Field

The utility model relates to a battery field especially relates to a battery filling retainer cup.

Background

In recent years, column batteries such as 18650 and 21700 have been widely used. The manufacturing process of different cylindrical batteries is similar: the positive and negative pole pieces and the diaphragm are wound into a cylindrical roll core, the roll core is placed into a cylindrical shell, then electrolyte is injected, and the seal is carried out after the roll core is placed in a vacuum state for a certain time.

At present, the structure of a liquid injection device of a column-type battery is as the Chinese patent with the publication number of CN 209344222U; the cylindrical battery comprises a battery shell, wherein the battery shell comprises a cylindrical battery shell with only an open upper end, a winding type battery cell structure (also called a winding core or a battery winding core) is arranged in the battery shell, and the central axis of the winding type battery cell structure is parallel to the central axis of the battery shell; on the core is rolled up in direct pouring into the battery case with electrolyte when annotating the liquid, the space that exceeds the core through battery case holds electrolyte as the stock solution space, and this liquid mode of annotating needs to add the electrolyte solution that this stock solution space can hold earlier, adds electrolyte once more after waiting to the evacuation lower liquid. The existing liquid injection mode of the column type battery has the following defects: (1) Because the amount of electrolyte which can be contained in the liquid storage space is limited, the electrolyte needs to be injected for multiple times, and the liquid storage space reserved in the battery shell is more limited along with the increasing requirement on the capacity of the battery; (2) Because the aperture of the central hole of the winding core is small, a certain amount of air is usually sealed in the bottom of the central hole during liquid injection, so that electrolyte can only permeate and infiltrate the structure of the battery cell from top to bottom, and the slow liquid discharge and low liquid injection efficiency during liquid injection become challenges for cylindrical battery manufacturing enterprises; (3) Because the stock solution space is limited, electrolyte is easy to splash and overflow during vacuumizing, so that the electrolyte loss is caused, the liquid retaining capacity is influenced, the overflow electrolyte is easy to pollute and corrode the battery, and the difficulty of subsequent cleaning is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid retainer cup is annotated to battery utilizes this retainer cup to annotate the liquid for annotate the liquid no longer receive the restriction that battery case exceeds the space size of rolling up the core, provide the condition for the packing space that improves battery electricity core.

Realize the utility model discloses the technical scheme of purpose is: a battery liquid filling sleeve cup comprises an annular cylinder body; any end of the annular cylinder is a battery shell connecting end; a partition plate is arranged in the annular cylinder body and divides the inner cavity of the annular cylinder body into an upper cavity and a lower cavity through the partition plate; the partition board is connected with an electrolyte liquid guide pipe, one end of the electrolyte liquid guide pipe is communicated with the upper cavity, and the other end of the electrolyte liquid guide pipe is inserted into the battery shell end.

The upper end of the cylindrical battery shell of the battery is arranged in an open mode during liquid injection. The utility model discloses a battery annotates liquid retainer cup the epicoele can keep in electrolyte, the electrolyte catheter passes in battery case's upper end (being "open end") inserts battery case, can with electrolyte water conservancy diversion to battery case internal through this electrolyte catheter, annotates the liquid and do not receive battery case to exceed the restriction of the space size of rolling up the core, provides the condition for the filling space that improves battery electricity core.

Preferably, the end, inserted into the battery shell, of the electrolyte guide pipe extends to the bottom of the inner side of the battery shell during liquid feeding, so that the battery winding core is wetted from bottom to top.

Preferably, the battery shell end of the electrolyte catheter is inserted into the central hole of the battery winding core and is communicated with the central hole, so that the wetting effect from bottom to top can be realized, and the wetting effect from the center to the periphery can also be realized.

Preferably, the one end that deviates from the battery case link of annular barrel is non-battery case link, non-battery case link opens the setting, just the port of non-battery case link is the electrolyte inlet. During liquid injection, electrolyte is supplied to the upper cavity and the electrolyte liquid guide pipe through the electrolyte liquid inlet.

Preferably, the partition board is provided with a plurality of through holes, and the connection end of the battery shell of the annular cylinder body is arranged in an open manner. During liquid injection, a part of electrolyte temporarily stored in the upper cavity of the annular cylinder body flows into the lower cavity through the through hole and then flows into the battery shell through the port of the connecting end of the battery shell. Further preferably, the battery shell connecting end of the annular cylinder is in seamless butt joint with the opening end of the battery shell, so that the inner cavity of the annular cylinder and the inner cavity of the battery shell are connected into an integrated electrolyte storage space, the electrolyte storage space is increased during electrolyte injection, the electrolyte injection frequency is reduced, and the electrolyte injection efficiency is further improved; in addition, when the non-battery shell connecting end of the annular cylinder is opened, the inner cavity of the annular cylinder and the inner cavity of the battery shell can be vacuumized at the electrolyte inlet, and at the moment, the design of the partition plate can reduce the overflow of electrolyte during vacuumizing, so that the pollution of the battery shell by the overflow electrolyte is avoided. In a specific implementation process, a sealing ring is clamped between the connecting end of the battery shell of the annular cylinder and the opening end of the battery shell to realize sealing between the connecting end of the battery shell and the opening end of the battery shell.

Preferably, the edge portion of the partition plate is provided with a plurality of notches at intervals along the circumferential direction of the edge portion. When the annular cylinder body and the partition plate are circular, each notch extends along the circumferential direction of the partition plate to form an arc. At this moment, the inner wall of annular barrel with can correspond between the edge part of baffle and form several arc clearances, do benefit to electrolyte more quick from the epicoele flow direction cavity of resorption.

Drawings

Fig. 1 is a schematic longitudinal sectional structural view of a battery liquid injection sleeve of example 1 or example 2;

FIG. 2 is a schematic top view of the separator according to example 1;

fig. 3 is a schematic top view of the separator according to embodiment 2.

Detailed Description

The preferred embodiment of the battery liquid filling sleeve of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1 and 2, a battery liquid filling sleeve comprises an annular cylinder 10; one end of the annular cylinder 10 is a battery shell connecting end 11; a partition plate 20 is arranged in the annular cylinder 10, and the inner cavity of the annular cylinder 10 is divided into an upper cavity 12 and a lower cavity 13 through the partition plate 20; an electrolyte liquid guide pipe 30 is connected to the partition plate 20, one end of the electrolyte liquid guide pipe 30 is communicated with the upper cavity 12, and the other end of the electrolyte liquid guide pipe 30 is inserted into a battery shell end 31; the separator 20 is provided with a plurality of through holes 21, the cell case connecting end 11 of the annular cylinder 10 is open, and the cell case connecting end 11 of the electrolyte liquid guide tube 30 is inserted into the central hole 51 of the cell roll core 50 and is communicated with the central hole 51 during liquid injection.

During liquid injection, the cell shell connecting end 11 of the annular cylinder 10 is in contact with the open end of the cell shell 40, the annular cylinder 10 is vertically placed above the open end of the cell shell, and the electrolyte in the upper cavity 12 of the annular cylinder 10 flows into the central hole 51 of the cell winding core 50 in the cell shell 40 through the electrolyte liquid guide pipe 30; meanwhile, the electrolyte in the upper chamber 12 of the annular cylinder 10 flows into the lower chamber 13 through the through hole 21, and then flows into the battery case 40 through the port of the battery case connection end 11.

Example 2

The difference between the battery liquid filling sleeve cup of the embodiment 2 and the battery liquid filling sleeve cup of the embodiment 1 is that: with reference to fig. 1 and 3, the partition plate 20 is a solid plate, and the partition plate 20 and the annular cylinder 10 are in seamless fit.

The electrolyte in the upper cavity 12 can be introduced into the battery shell 40 through the electrolyte guide tube 30 in the battery filling sleeve cups of the embodiments 1 and 2, so that the filling is no longer limited by the space of the battery shell 40 higher than the battery winding core 50, and conditions are provided for improving the filling space of the battery core. Meanwhile, gas in the center hole 51 of the battery roll core is discharged in time, and meanwhile, the effect that the battery roll core 50 is soaked by electrolyte from bottom to top is improved, and liquid injection efficiency is improved.

Of course, the battery liquid filling sleeve of the present invention can be inserted into the center hole 51 of the battery roll core 50 but not limited to the battery shell connecting end 11 of the electrolyte liquid guiding tube 30 when filling liquid, and can also be inserted into the annular gap between the outer wall of the battery roll core 50 and the inner wall of the battery shell 40 and communicated with the annular gap. However, when the case connection end 11 of the electrolyte guide 30 is inserted into the center hole 51 of the battery core 50, not only the wetting effect from the bottom to the top but also the wetting effect from the center to the outer periphery can be achieved.

Preferably, as shown in fig. 1, the case connecting end 11 of the electrolyte conduit 30 extends to the bottom of the inside of the case 40 when the liquid is supplied.

Preferably, as shown in fig. 1, one end of the annular cylinder 10 away from the battery case connection end 11 is a non-battery case connection end 14, the non-battery case connection end 14 is open, and a port of the non-battery case connection end is an electrolyte inlet. During liquid injection, the electrolyte is supplied to the upper chamber 12 and the electrolyte guide tube 30 through the electrolyte inlet in real time. Of course, the non-battery-case connection end 14 of the annular cylinder 10 may be closed, and the electrolyte needs to be stored in the upper chamber 12 in advance.

Preferably, as shown in fig. 1, the battery case connecting end 11 of the annular cylinder 10 is in seamless butt joint with the opening end of the battery case 40, so that the inner cavity of the annular cylinder 10 and the inner cavity of the battery case 40 are connected into an integrated electrolyte storage space, the electrolyte storage space is increased during electrolyte injection, the number of times of liquid injection is reduced, and the liquid injection efficiency is further improved; in addition, when the non-battery shell connecting end 14 of the annular cylinder 10 is opened, the inner cavity of the annular cylinder 10 and the inner cavity of the battery shell 40 can be vacuumized at the electrolyte inlet, and at this time, the design of the partition plate 20 can also reduce the overflow of the electrolyte during the vacuuming, so as to prevent the overflow electrolyte from polluting the battery shell 40. In a specific implementation process, as shown in fig. 1, a sealing ring 60 is interposed between the cell housing connection end 11 of the annular cylinder 10 and the open end of the cell housing 40 to realize sealing therebetween.

Example 1 can also be modified as follows: as shown in fig. 2, the edge of the partition board 20 is provided with a plurality of notches 22 along the circumferential direction. When the annular cylinder 10 and the partition plate 20 are circular, each of the notches 22 extends in an arc shape along the circumferential direction of the partition plate 20. At this time, a plurality of arc gaps are correspondingly formed between the inner wall of the annular cylinder 10 and the edge of the partition plate 20, which is beneficial to the electrolyte to flow from the upper chamber 12 to the lower chamber 13 more quickly. Of course, the notch 22 may not be provided on the partition plate 20 of the present invention. Also, when the notch 22 is provided, the shape of the notch 22 may be, but is not limited to, an arc shape in the drawings.

In one embodiment, the electrolyte conduit 30 is a hollow tube.

Of course, the battery liquid injection sleeve cup of the present invention is particularly suitable for injecting liquid into a cylindrical battery (for example, a battery with a cylindrical shape or a square column shape), and meanwhile, is also suitable for injecting liquid into other types of batteries (for example, a soft package battery).

The above only be the embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all utilize the equivalent flow transform that the content of the specification was made, or direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses a patent protection within range.

Claims

1. A battery liquid filling sleeve cup is characterized in that: comprises an annular cylinder body; any end of the annular cylinder is a battery shell connecting end; a partition plate is arranged in the annular cylinder body and divides the inner cavity of the annular cylinder body into an upper cavity and a lower cavity through the partition plate; the partition board is connected with an electrolyte liquid guide pipe, one end of the electrolyte liquid guide pipe is communicated with the upper cavity, and the other end of the electrolyte liquid guide pipe is inserted into the battery shell end.

2. The battery electrolyte injection sleeve cup of claim 1, wherein: and the end of the electrolyte guide pipe inserted into the battery shell extends to the bottom of the inner side of the battery shell during liquid feeding.

3. The battery electrolyte injection sleeve cup of claim 1, wherein: the end of the electrolyte liquid guide pipe inserted into the battery shell is inserted into a central hole of a battery roll core in the battery shell and is communicated with the central hole.

4. The battery electrolyte injection sleeve cup of claim 1, wherein: the one end that deviates from the battery case link of annular barrel is non-battery case link, non-battery case link opens the setting, just the port of non-battery case link is the electrolyte inlet.

5. The battery electrolyte injection sleeve cup of claim 1, wherein: a plurality of through holes are formed in the partition plate, and the connecting end of the battery shell of the annular cylinder body is arranged in an open mode.

6. The battery electrolyte injection sleeve cup of claim 5, wherein: the battery shell connecting end of the annular cylinder body is in seamless butt joint with the opening end of the battery shell.

7. The battery electrolyte injection sleeve cup of claim 6, wherein: and a sealing ring is clamped between the connecting end of the battery shell of the annular cylinder and the opening end of the battery shell.

8. The battery electrolyte injection sleeve cup of claim 5, wherein: the edge part of the clapboard is provided with a plurality of notches at intervals along the circumferential direction of the clapboard.

9. The battery electrolyte injection sleeve cup of claim 8, wherein: when the annular cylinder body and the partition plate are circular, each notch extends along the circumferential direction of the partition plate to form an arc.