CN216213972U

CN216213972U - Liquid injection assembly

Info

Publication number: CN216213972U
Application number: CN202121251131.9U
Authority: CN
Inventors: 张智斌; 谭健; 邹凌云
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-04-05
Anticipated expiration: 2031-06-04

Abstract

The application discloses annotate liquid subassembly, including reposition of redundant personnel piece, reposition of redundant personnel piece includes reposition of redundant personnel portion, and reposition of redundant personnel portion has relative feed liquor end and goes out the liquid end, and reposition of redundant personnel portion has a plurality of first minute flow channels and a plurality of second minute flow channels, and first minute flow channel and second divide the flow channel to link up to going out the liquid end by the feed liquor end. Electrolyte is injected from the liquid inlet end and is distributed to the first branched flow channels and the second branched flow channels, the speed of the electrolyte towards different directions can be obtained in the first branched flow channels and the second branched flow channels, and the electrolyte can be sprayed out towards different directions.

Description

Liquid injection assembly

Technical Field

The application relates to the technical field of power batteries, in particular to a liquid injection assembly.

Background

In the production process of the lithium ion battery, a formation process is needed, namely, in the first charging and discharging process, electrolyte needs to be filled into the lithium ion battery, so that the electrolyte is fully contacted with a roll core, and a passivation film is formed on the surface of the roll core, so that the condition that the battery is obviously irreversible in capacity after leaving a factory and the use is influenced is avoided. In the related art, the liquid injection assembly provided with liquid inlet holes in different directions appears, electrolyte can be sprayed in multiple directions, but the electrolyte is not uniformly sprayed, and the electrolyte still needs to be subjected to high-temperature standing for a long time after being injected.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. For this reason, this application provides an annotate liquid subassembly, can spray electrolyte in rolling up the core more evenly.

The utility model provides a annotate liquid subassembly, including the reposition of redundant personnel piece, the reposition of redundant personnel piece includes the reposition of redundant personnel portion, the reposition of redundant personnel portion has relative feed liquor end and goes out the liquid end, the reposition of redundant personnel portion has a plurality of first branch runners and a plurality of second branch runners, first branch runner reaches the second divides the runner by the feed liquor end link up extremely go out the liquid end, it is a plurality of first branch runner encloses to be located the center of reposition of redundant personnel portion, it is a plurality of the second divides the runner to enclose to be located the center of reposition of redundant personnel portion, the second divides the runner relatively first branch runner is kept away from the center of reposition of redundant personnel portion the feed liquor end is close to go up in the direction of going out the liquid end, first branch runner reaches the second branch runner by the feed liquor end to keeping away from the direction slope at the center of reposition of redundant personnel portion, the gradient of second branch runner is greater than the gradient of first branch runner.

The liquid injection assembly provided by the embodiment of the application at least has the following beneficial effects: electrolyte is injected from the liquid inlet end of the shunting part and shunted to each first shunting passage and each second shunting passage, so that the speeds of the electrolyte towards different directions can be obtained in each first shunting passage and each second shunting passage, and the electrolyte can be sprayed out towards different directions.

In some embodiments of this application, the reposition of redundant personnel still includes into liquid portion, it connects in the feed liquor end to advance liquid portion, it has the feed liquor hole to advance liquid portion, the feed liquor hole communicate in a plurality of first reposition of redundant personnel passageway and a plurality of the second reposition of redundant personnel passageway.

In some embodiments of the present application, a width of the liquid inlet portion is smaller than a width of the flow dividing portion.

In some embodiments of the present application, the cross-sectional area of the first sub-flow passage and the cross-sectional area of the second sub-flow passage gradually decrease in a direction in which the liquid inlet end is close to the liquid outlet end.

In some embodiments of the present application, the first branch flow channel comprises at least two first connecting sections connected in sequence, an inclination of the first connecting section near the liquid outlet end is greater than an inclination of the first connecting section far away from the liquid outlet end, and/or the second branch flow channel comprises at least two second connecting sections connected in sequence, and an inclination of the second connecting section near the liquid outlet end is greater than an inclination of the second connecting section far away from the liquid outlet end.

In some embodiments of the present application, the flow dividing portion further has a plurality of first liquid homogenizing passages, and both ends of the first liquid homogenizing passages are respectively communicated with the first flow dividing passage and the second flow dividing passage.

In some embodiments of the present application, in a direction in which the liquid inlet end is close to the liquid outlet end, the first liquid homogenizing passage is inclined to a direction away from a center of the flow dividing portion.

In some embodiments of the present application, the lengths of the plurality of first branch flow paths are the same, the lengths of the plurality of second branch flow paths are the same, and the lengths of the first branch flow paths are the same as the lengths of the second branch flow paths.

In some embodiments of the present application, the flow dividing portion further has a center flow channel and a second homogenizing channel, the center flow channel is located at the center of the flow dividing portion, one end of the second homogenizing channel is communicated with the center flow channel, and the other end of the second homogenizing channel is communicated with the first flow dividing channel.

In some embodiments of this application, annotate the liquid subassembly and still include a liquid spare, a liquid spare includes apron and inserted bar, the apron connect in the inserted bar, the apron can cover in the feed liquor end, the inserted bar can insert central flow channel.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic perspective view of a liquid injection assembly provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of the priming assembly shown in FIG. 1;

FIG. 3 is a cross-sectional view of another priming assembly provided in accordance with an embodiment of the present application;

FIG. 4 is a top view of a flow splitter of the priming assembly shown in FIG. 1;

fig. 5 is a cross-sectional view of a single battery to which a liquid injection assembly according to an embodiment of the present application is applied.

Reference numerals:

the liquid distribution device comprises a flow distribution member 100, a flow distribution part 110, a liquid inlet end 111, a liquid outlet end 112, a first flow distribution channel 113, a first connecting section 1131, a second flow distribution channel 114, a second connecting section 1141, a first liquid homogenizing channel 115, a central flow channel 116, a second liquid homogenizing channel 117, a liquid inlet part 120, a liquid inlet hole 121, a liquid sealing member 200, a cover plate 210, an inserted bar 220, a battery top cover 1, a shell 2 and a battery cell 3.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated above, below, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

Reference throughout this specification to the description of "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The liquid injection assembly provided by the embodiment of the application, including reposition of redundant personnel 100, reposition of redundant personnel 100 includes reposition of redundant personnel portion 110, reposition of redundant personnel portion 110 has relative inlet end 111 and goes out liquid end 112, reposition of redundant personnel portion 110 has a plurality of first branch runners 113 and a plurality of second branch runners 114, first branch runner 113 and second branch runner 114 link up to going out liquid end 112 by inlet end 111, a plurality of first branch runners 113 enclose the center of locating reposition of redundant personnel portion 110, a plurality of second branch runners 114 enclose the center of locating reposition of redundant personnel portion 110, the center of reposition of redundant personnel portion 110 is kept away from to first branch runner 113 to second branch runner 114, on inlet end 111 is close to the direction of going out liquid end 112, first branch runner 113 and second branch runner 114 are by inlet end 111 to the direction slope of keeping away from the center of reposition of redundant personnel portion 110, the slope of second branch runner 114 is greater than the slope of first branch runner 113.

For example, as shown in fig. 1 to 3, the liquid injection assembly includes a flow divider 100, the flow divider 100 includes a flow divider 110, the flow divider 110 has an opposite liquid inlet end 111 and an opposite liquid outlet end 112, the flow divider 110 has a plurality of first flow dividing channels 113 and a plurality of second flow dividing channels 114, both the first flow dividing channels 113 and the second flow dividing channels 114 penetrate through the liquid inlet end 111 to the liquid outlet end 112, the plurality of first flow dividing channels 113 surround the center of the flow divider 110, the plurality of second flow dividing channels 114 surround the center of the flow divider 110, the second flow dividing channels 114 are far from the center of the flow divider 110 relative to the first flow dividing channels 113, in a direction in which the liquid inlet end 111 is close to the liquid outlet end 112, both the first flow dividing channels 113 and the second flow dividing channels 114 are inclined in a direction far from the center of the flow divider 110 by the liquid inlet end 111, and an inclination of the second flow dividing channels 114 is greater than an inclination of the first flow dividing channels 113. Referring to fig. 5, annotate the liquid subassembly and set up on battery top cap 1, 1 lock of battery top cap is on shell 2, electric core 3 holding in the inside of shell 2, electrolyte is through annotating the liquid subassembly and pour into in shell 2, electrolyte is poured into by the feed liquor end 111 of reposition of redundant personnel portion 110, and shunt to in each first minute runner 113 and the second minute runner 114, can obtain the speed towards not equidirectional in each first minute runner 113 and each second minute runner 114, guarantee that electrolyte can spray to electric core 3 towards not equidirectional on, electric core 3 can contact comparatively fully with electrolyte, do benefit to and form the passive film, thereby can shorten the time of follow-up high temperature process of stewing, and is labor-saving and production cost is reduced.

It is understood that the sizes of the first branched flow passage 113 and the second branched flow passage 114 are not limited and may be set according to actual requirements. The inclination angles of the first branched flow passage 113 and the second branched flow passage 114 are not limited, and may be set according to actual requirements. Referring to fig. 4, a plurality of first diverging passages 113 may be uniformly distributed around the center of the diverging part 110, and a plurality of second diverging passages 114 may be uniformly distributed around the center of the diverging part 110, to improve the uniformity of the electrolyte spray in all directions.

The flow divider 100 may further include a liquid inlet portion 120, the liquid inlet portion 120 is connected to the liquid inlet end 111, the liquid inlet portion 120 has a liquid inlet hole 121, and the liquid inlet hole 121 is communicated with the plurality of first flow dividing channels 113 and the plurality of second flow dividing channels 114.

For example, as shown in fig. 1 to fig. 3, the flow divider 100 further includes a liquid inlet portion 120, the liquid inlet portion 120 is connected to the liquid inlet end 111, the liquid inlet portion 120 has a liquid inlet hole 121, and the liquid inlet hole 121 is communicated with the plurality of first flow dividing channels 113 and the plurality of second flow dividing channels 114. The liquid inlet hole 121 can provide a containing space for the external liquid inlet pipe, and during liquid injection, the external liquid inlet pipe can be inserted into the liquid inlet hole 121 of the liquid inlet portion 120 to inject liquid into the flow dividing portion 110.

It is understood that the size of the liquid inlet portion 120 is not limited, and the sectional area of the liquid inlet portion 120 may be set smaller than that of the flow dividing portion 110, and the liquid inlet hole 121 may be communicated with each of the first flow dividing channel 113 and each of the second flow dividing channels 114, so as to ensure the injection pressure of the electrolyte.

The width of the liquid inlet portion 120 is smaller than the width of the flow dividing portion 110.

For example, as shown in fig. 4, the width of the liquid inlet portion 120 is smaller than the width of the flow dividing portion 110. In the flow dividing part 110, the first flow dividing channel 113 and the second flow dividing channel 114 are inclined outwards from the center of the flow dividing part 110, the first flow dividing channel 113 and the second flow dividing channel 114 are more gathered at the liquid inlet end 111 relative to the liquid outlet end 112, the liquid inlet part 120 is connected to the liquid inlet end 111, the width of the liquid inlet part 120 is smaller than that of the flow dividing part 110, the electrolyte injected into the liquid inlet hole 121 can flow into the first flow dividing channel 113 and the second flow dividing channel 114 as soon as possible, so that the retention of the electrolyte in the liquid inlet hole 121 is reduced, and the liquid injection efficiency is improved.

In the direction in which the liquid inlet end 111 is close to the liquid outlet end 112, the cross-sectional area of the first sub-flow passage 113 and the cross-sectional area of the second sub-flow passage 114 are gradually reduced.

For example, as shown in fig. 2 and fig. 3, in the direction in which the liquid inlet end 111 is close to the liquid outlet end 112, the cross-sectional area of the first branch flow channel 113 and the cross-sectional area of the second branch flow channel 114 are gradually decreased, referring to fig. 5, when the electrolyte passes through the first branch flow channel 113 and the second branch flow channel 114, the pressure is gradually increased, the range of the sprayed electrolyte is further extended, the electrolyte is more favorably sprayed on both sides of the battery cell 3, and the uniformity of the contact between the surface of the battery cell 3 and the electrolyte is improved.

It is understood that the decreasing cross-sectional area gradient of the first sub-runner 113 and the second sub-runner 114 is not limited, and may be set according to the actual use requirement.

It should be noted that the first sub-channel 113 includes at least two first connecting sections 1131 connected in sequence, and an inclination of the first connecting section 1131 near the liquid outlet end 112 is greater than an inclination of the first connecting section 1131 far from the liquid outlet end 112, and/or the second sub-channel 114 includes at least two second connecting sections 1141 connected in sequence, and an inclination of the second connecting section 1141 near the liquid outlet end 112 is greater than an inclination of the second connecting section 1141 far from the liquid outlet end 112.

For example, as shown in fig. 3, the first diversion channel 113 includes two first connecting sections 1131 connected in sequence, an inclination of the first connecting section 1131 near the liquid outlet end 112 is greater than an inclination of the first connecting section 1131 far from the liquid outlet end 112, and the electrolyte flows through the first diversion channel 113 and is ejected from the first connecting section 1131 with a greater inclination, so that the range is farther, which is more favorable for spraying the electrolyte to two sides of the battery cell 3; the second branch flow channel 114 includes two second connection sections 1141 connected in sequence, the inclination of the second connection section 1141 close to the liquid outlet end 112 is greater than the inclination of the second connection section 1141 far away from the liquid outlet end 112, the electrolyte flows through the second branch flow channel 114 and is ejected from the second connection section 1141 with greater inclination, the range is farther, and the electrolyte is more favorably sprayed to the two sides of the battery cell 3.

It is understood that the first sub-channel 113 having a plurality of first connecting sections 1131 connected in sequence can be separately disposed, or the second sub-channel 114 having a plurality of second connecting sections 1141 connected in sequence can be separately disposed, or both the first sub-channel 113 having a plurality of first connecting sections 1131 connected in sequence and the second sub-channel 114 having a plurality of second connecting sections 1141 connected in sequence can be disposed according to the requirement of the electrolyte range. The number of the first connecting sections 1131 included in the first branch flow channel 113 is not limited, and the number of the second connecting sections 1141 included in the second branch flow channel 114 is not limited, and may be set according to the use requirement, the processing difficulty, and the like.

The flow dividing portion 110 further includes a plurality of first leveling channels 115, and both ends of the first leveling channels 115 are respectively communicated with the first flow dividing channel 113 and the second flow dividing channel 114.

For example, as shown in fig. 2 and 3, the flow dividing portion 110 further includes a plurality of first liquid-uniformizing passages 115, and both ends of the first liquid-uniformizing passages 115 are respectively communicated with the first sub-flow passage 113 and the second sub-flow passage 114. The electrolyte is injected from the liquid inlet end 111 of the flow dividing part 110 and divided into the first branch flow channel 113 and the second branch flow channel 114, because the inclination of the second branch flow channel 114 is greater than that of the first branch flow channel 113, the flow rate of the electrolyte in the first branch flow channel 113 is greater than that in the second branch flow channel 114, the electrolyte in the first branch flow channel 113 can flow to the second branch flow channel 114 along the first liquid homogenizing channel 115, so that the flow rates of the electrolyte in the first branch flow channel 113 and the second branch flow channel 114 tend to be consistent, and the electrolyte can be sprayed out more uniformly.

It is understood that the size of the first leveling channel 115 is not limited, and can be set according to actual requirements.

In the direction in which the liquid inlet end approaches the liquid outlet end, the first liquid uniformizing passage 115 is inclined in a direction away from the center of the flow dividing portion 110.

For example, as shown in fig. 2 and 3, the first homogenizing passage 115 is inclined in a direction away from the center of the flow dividing part 110 in a direction in which the liquid inlet end approaches the liquid outlet end, and since the inclined direction of the first homogenizing passage 115 approaches the direction in which the electrolyte flows, the electrolyte can smoothly flow into the second flow dividing passage 114 from the first flow dividing passage 113 after the electrolyte is injected, and the effect of equalizing the flow rates of the electrolyte in the first flow dividing passage 113 and the second flow dividing passage 114 by the first homogenizing passage 115 is further improved.

The lengths of the first branched ducts 113 are the same, the lengths of the second branched ducts 114 are the same, and the length of the first branched duct 113 is the same as the length of the second branched duct 114.

For example, as shown in fig. 2, the lengths of the first branch channels 113 are the same, the lengths of the second branch channels 114 are the same, the lengths of the first branch channels 113 are the same as the lengths of the second branch channels 114, and under the action of the first liquid-homogenizing channel 115, the flow rates of the electrolyte in the first branch channels 113 and the second branch channels 114 tend to be the same, so that the electrolyte can be ejected more closely to be ejected simultaneously after passing through the first branch channels 113 and the second branch channels 114 with the same lengths, and the uniformity of the electrolyte spraying in all directions is improved.

The flow dividing portion 110 further includes a center flow passage 116 and a second liquid homogenizing passage 117, the center flow passage 116 is located at the center of the flow dividing portion 110, one end of the second liquid homogenizing passage 117 is communicated with the center flow passage 116, and the other end of the second liquid homogenizing passage 117 is communicated with the first flow dividing passage 113.

For example, as shown in fig. 2, the flow dividing portion 110 further includes a center flow path 116 and a second liquid homogenizing path 117, the center flow path 116 is located at the center of the flow dividing portion 110, one end of the second liquid homogenizing path 117 is communicated with the center flow path 116, and the other end of the second liquid homogenizing path 117 is communicated with the first flow dividing path 113. The electrolyte flow rate in the central flow channel 116 is relatively high, and the second electrolyte homogenizing channel 117 can introduce the electrolyte in the central flow channel 116 into the first sub-flow channel 113, so that the electrolyte flow rates in the central flow channel 116 and the first sub-flow channel 113 tend to be consistent.

It can be understood that the second liquid homogenizing channel 117 can be inclined towards the direction away from the center of the flow dividing part 110 and close to the liquid outlet end 112, and since the inclined direction of the second liquid homogenizing channel 117 approaches the flowing direction of the electrolyte, the electrolyte can smoothly flow into the first sub-channel 113 from the central channel 116 after being injected, so as to further improve the effect of the second liquid homogenizing channel 117 in equalizing the flow rates of the electrolyte in the central channel 116 and the first sub-channel 113.

The liquid injection assembly can further comprise a liquid sealing part 200, wherein the liquid sealing part 200 comprises a cover plate 210 and an insertion rod 220, the cover plate 210 is connected to the insertion rod 220, the cover plate 210 can cover the liquid inlet end 111, and the insertion rod 220 can be inserted into the central flow passage 116.

For example, as shown in fig. 1 to fig. 2, the liquid injection assembly further includes a liquid sealing member 200, the liquid sealing member 200 includes a cover plate 210 and an insertion rod 220, the cover plate 210 is connected to the insertion rod 220, the cover plate 210 can cover the liquid inlet end 111, and the insertion rod 220 can be inserted into the central flow channel 116. After the liquid injection is completed, the liquid sealing member 200 is inserted into the central flow channel 116 of the flow dividing portion 110 through the insertion rod 220, and the cover plate 210 can cover the liquid inlet end 111, that is, the openings of the first flow dividing channel 113, the second flow dividing channel 114 and the central flow channel 116, so as to prevent the electrolyte from flowing out of the first flow dividing channel 113, the second flow dividing channel 114 and the central flow channel 116 in the subsequent high-temperature standing process.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims

1. Annotate liquid subassembly, its characterized in that includes:

reposition of redundant personnel piece, including reposition of redundant personnel portion, reposition of redundant personnel portion has relative feed liquor end and goes out the liquid end, reposition of redundant personnel portion has a plurality of first minute runners and a plurality of second minute runners, first minute runner reaches the second divide the runner by the feed liquor end link up extremely go out the liquid end, it is a plurality of first minute runner encloses to be located the center of reposition of redundant personnel portion, it is a plurality of the second divides the runner to enclose to be located the center of reposition of redundant personnel portion, the second divides the runner relatively first minute runner is kept away from the center of reposition of redundant personnel portion the feed liquor end is close to go out in the direction of liquid end, first minute runner reaches the second divides the runner all to keeping away from the direction slope at the center of reposition of redundant personnel portion, the gradient that the second divides the runner is greater than the gradient of first minute runner.

2. The liquid injection assembly according to claim 1, wherein the flow divider further comprises a liquid inlet portion, the liquid inlet portion is connected to the liquid inlet end, the liquid inlet portion has a liquid inlet hole, and the liquid inlet hole is communicated with the plurality of first flow dividing channels and the plurality of second flow dividing channels.

3. The priming assembly of claim 2, wherein a width of the priming portion is less than a width of the diverter portion.

4. The priming assembly of claim 1, wherein a cross-sectional area of the first bypass passage and a cross-sectional area of the second bypass passage decrease in a direction from the inlet end to the outlet end.

5. The liquid injection assembly according to claim 1, wherein the first branch flow passage comprises at least two first connecting sections connected in sequence, the first connecting section near the liquid outlet end has a larger inclination than the first connecting section far away from the liquid outlet end, and/or the second branch flow passage comprises at least two second connecting sections connected in sequence, and the second connecting section near the liquid outlet end has a larger inclination than the second connecting section far away from the liquid outlet end.

6. The liquid injection assembly according to claim 1, wherein the flow dividing portion further has a plurality of first liquid homogenizing passages, and both ends of the first liquid homogenizing passages are respectively communicated with the first sub-flow passage and the second sub-flow passage.

7. The liquid injection assembly according to claim 6, wherein the first liquid homogenizing passage is inclined in a direction away from the center of the flow dividing portion in a direction in which the liquid inlet end is close to the liquid outlet end.

8. The priming assembly of claim 6, wherein the plurality of first shunt channels are the same length, the plurality of second shunt channels are the same length, and the first shunt channels are the same length as the second shunt channels.

9. The liquid injection assembly according to claim 1, wherein the flow dividing portion further has a central flow channel and a second liquid homogenizing channel, the central flow channel is located at the center of the flow dividing portion, one end of the second liquid homogenizing channel is communicated with the central flow channel, and the other end of the second liquid homogenizing channel is communicated with the first flow dividing channel.

10. The liquid injection assembly according to claim 9, further comprising a liquid sealing member, wherein the liquid sealing member comprises a cover plate and an insertion rod, the cover plate is connected to the insertion rod, the cover plate can cover the liquid inlet end, and the insertion rod can be inserted into the central flow channel.