CN215732117U - Lithium battery formation device capable of preventing electrolyte from flowing backwards - Google Patents
Lithium battery formation device capable of preventing electrolyte from flowing backwards Download PDFInfo
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- CN215732117U CN215732117U CN202122146763.5U CN202122146763U CN215732117U CN 215732117 U CN215732117 U CN 215732117U CN 202122146763 U CN202122146763 U CN 202122146763U CN 215732117 U CN215732117 U CN 215732117U
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- Prior art keywords
- pipeline
- electrolyte
- infusion
- backflow
- liquid
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 83
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 44
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000001802 infusion Methods 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000002699 waste material Substances 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a lithium battery formation device for preventing electrolyte from flowing backwards, which comprises a transfusion backflow pipeline, a transfusion port and a one-way circulation structure, wherein the transfusion backflow pipeline is connected with the transfusion port; the transfusion port is arranged at one end of the transfusion backflow pipeline and is not communicated with the transfusion backflow pipeline; the infusion port is communicated with the inlet of the infusion pipeline, the outlet of the infusion pipeline is provided with a one-way circulation structure, and the one-way circulation structure enables the electrolyte to flow from the inlet of the infusion pipeline to the outlet of the infusion pipeline only; the liquid conveying backflow pipeline is provided with a first liquid outlet and a second liquid outlet, the first liquid outlet is used for outputting electrolyte to an electric core to be subjected to negative pressure formation, and the second liquid outlet is used for discharging waste electrolyte. The one-way circulation structure is opened when the electrolyte is injected and closed after the electrolyte is injected, so that the electrolyte pumped out during formation can be effectively prevented from flowing back into the infusion pipeline. In addition, the second liquid outlet for discharging the waste electrolyte is arranged on the liquid conveying backflow pipeline, so that the electrolyte is prevented from crystallizing and blocking the formation pipeline.
Description
Technical Field
The utility model relates to the technical field of lithium battery formation devices, in particular to a lithium battery formation device capable of preventing electrolyte from flowing backwards.
Background
In the production and manufacturing process of the lithium battery, the formation of the lithium battery plays a crucial role. At present, lithium battery manufacturers generally adopt negative pressure formation to perform formation activation of lithium batteries. Before negative pressure formation, electrolyte is injected into the battery cell through the formation device. And when the battery cell is formed under negative pressure, vacuumizing, charging and standing the semi-finished battery cell to obtain the formed battery cell. When negative pressure formation is carried out, the electrolyte injected into the battery core is pumped back to the infusion channel of the formation device due to the fact that the interior of the battery core is vacuumized, and when the electrolyte is injected into the next battery core, the electrolyte pumped back to the infusion pipeline can be injected into the next battery core along with new electrolyte, so that the battery subjected to negative pressure formation at the back is polluted. In the past, the battery is polluted, and the electrolyte in the formation pipeline blocks the infusion pipeline due to crystallization. Therefore, there is a need for an improved lithium battery formation device in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lithium battery formation device capable of preventing electrolyte from flowing backwards, and the lithium battery formation device can solve the problem that in the prior art, after the formation of a previous battery core is finished, the extracted electrolyte flows backwards to a liquid conveying channel of the formation device and is injected into the interior of a next battery formed under negative pressure so as to pollute the next battery.
The purpose of the utility model is realized by the following technical scheme:
a lithium battery formation device for preventing electrolyte from flowing backwards comprises a transfusion backflow pipeline, a transfusion port and a one-way circulation structure; the transfusion port is arranged at one end of the transfusion backflow pipeline; the infusion reflux pipeline is communicated with the infusion pipeline; the infusion port is communicated with the inlet of the infusion pipeline, the outlet of the infusion pipeline is provided with a one-way circulation structure, and the one-way circulation structure enables the electrolyte to flow from the inlet of the infusion pipeline to the outlet of the infusion pipeline only; the liquid conveying backflow pipeline is provided with a first liquid outlet and a second liquid outlet, the first liquid outlet is used for outputting electrolyte to an electric core to be subjected to negative pressure formation, and the second liquid outlet is used for discharging waste electrolyte.
Furthermore, prevent lithium cellization of electrolyte refluence become device still include useless electrolyte discharge tube, the one end of useless electrolyte discharge tube passes through second liquid outlet and infusion backflow pipeline intercommunication.
Furthermore, the infusion pipeline is arranged inside the infusion backflow pipeline, the inlet of the infusion pipeline is arranged at one end, close to the infusion port, of the infusion backflow pipeline, and the outlet of the infusion pipeline extends into the inner cavity of the infusion backflow pipeline.
Further, when electrolyte is injected into the battery core, the one-way circulation structure is opened by the internal air pressure of the infusion pipeline, and the internal cavity of the infusion pipeline is communicated with the internal cavity of the infusion backflow pipeline through the outlet of the infusion pipeline.
Furthermore, the one-way circulation structure is a spherical shell consisting of a plurality of check valves; the wide end of the check valve is rotationally connected with the infusion pipeline, and the tip of the check valve opens outwards around the rotational connection part under the action of the air pressure in the infusion pipeline.
Furthermore, when electrolyte is not required to be injected, the tips of the check valves are gathered to form a sealed spherical shell, so that the infusion pipeline is not communicated with the infusion backflow pipeline.
Further, the non-return valve is petal-shaped.
Furthermore, an infusion port ball valve is arranged at the infusion port and used for controlling the opening or closing of the infusion port.
Further, a liquid outlet ball valve is arranged at the second liquid outlet and used for controlling the opening or closing of the second liquid outlet.
Further, the other end of the waste electrolyte discharge pipeline is provided with a liquid outlet ball valve for controlling the opening or closing of the second liquid outlet.
The lithium battery formation device for preventing the electrolyte from flowing backwards comprises a one-way circulation structure. When electrolyte is injected into the battery, the one-way circulation structure is opened to enable the electrolyte to pass through. When carrying out the evacuation operation to the battery, one-way circulation structure is closed, and the electrolyte of being taken out is isolated outside one-way conduction structure, can effectively avoid being flowed back into the infusion pipeline by the electrolyte of being taken out when becoming, is injected into next electric core along with new electrolyte together to pollute the battery of next treating becoming. In addition, the second liquid outlet of the waste electrolyte is arranged on the liquid conveying backflow pipeline, air is pumped from the second liquid outlet, so that the electrolyte in the formation pipeline is pumped out, and the electrolyte is prevented from being crystallized and blocked to form the pipeline.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the lithium battery formation device of the present invention in an operating state when a one-way flow structure is opened;
fig. 2 is a schematic view of the lithium battery formation device of the present invention in an operating state when the one-way flow structure is closed.
The reference numerals are explained below:
1: infusion return line, 11: first liquid outlet, 12: second liquid outlet, 2: infusion tube, 3: infusion port, 31: transfusion port ball valve, 4: one-way flow structure, 41: check flap, 5: waste electrolyte discharge line, 51: a liquid outlet ball valve.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The lithium battery formation device for preventing the backflow of the electrolyte, disclosed by the utility model, comprises a transfusion backflow pipeline 1, a transfusion pipeline 2, a transfusion port 3 and a one-way circulation structure 4, as shown in figure 1; the transfusion port 3 is arranged at one end of the transfusion backflow pipeline 1. The transfusion reflux pipeline 1 is communicated with the transfusion pipeline 2. The transfusion port 3 is communicated with the inlet of the transfusion pipeline 2, the outlet of the transfusion pipeline 2 is provided with a one-way circulation structure 4, and the one-way circulation structure 4 enables electrolyte to flow to the outlet of the transfusion pipeline 2 only from the inlet of the transfusion pipeline 2. When electrolyte is injected into the battery core, the one-way circulation structure 4 is opened, and the inner cavity of the infusion pipeline 2 is communicated with the inner cavity of the infusion backflow pipeline 1 through the outlet of the infusion pipeline 2. The infusion reflux pipeline 1 is provided with a first liquid outlet 11 and a second liquid outlet 12, the first liquid outlet 11 is used for outputting electrolyte to an electric core to be formed by negative pressure, and the second liquid outlet 12 is used for discharging waste electrolyte.
The working principle and the beneficial effects of the lithium battery formation device shown in fig. 1 are as follows:
and (3) injecting electrolyte into the battery core: in the normal state, the one-way flow structure 4 is closed. When electrolyte is injected from the inlet of the infusion pipeline 2, the air pressure of the inner cavity of the infusion pipeline 2 is increased, the one-way circulation structure 4 is opened after being subjected to the internal pressure of the pipeline 2, the electrolyte is injected into the infusion backflow pipeline 1 from the outlet of the infusion pipeline 2, namely the electrolyte is injected from the infusion port 3 and sequentially passes through the inner cavity of the infusion pipeline 2, the inner cavity of the infusion backflow pipeline 1 and the electric core injected from the first liquid outlet 11.
And (3) formation stage: after the battery core is injected with the electrolyte, the one-way circulation structure 4 is recovered to be in a closed state. And (3) starting to perform negative pressure formation, performing vacuum-pumping treatment on the inside of the battery cell, pumping out part of electrolyte in the battery cell due to vacuum-pumping operation, and refluxing the electrolyte into the inner cavity of the infusion reflux pipeline 1, wherein the refluxed electrolyte is waste electrolyte and has impurities, and cannot be injected into other battery cells again. At this time, since the one-way flow structure 4 is in the closed state, the returned electrolyte does not flow into the transfusion tube 2. The inside of the infusion tube 2 is kept clean. In addition, air is drawn from the second outlet 12, and the returned spent electrolyte is drawn from the second outlet 12. The waste electrolyte is prevented from crystallizing in the infusion reflux pipeline 1 to block the infusion pipeline.
Further, the infusion tube 2 is arranged inside the infusion reflux tube 1, the inlet of the infusion tube 2 is arranged at one end of the infusion reflux tube 1, and the outlet of the infusion tube 2 extends into the inner cavity of the infusion reflux tube 1. The arrangement can reduce the external dimension of the formation device, so that the structure is more compact.
Further, the one-way flow structure 4 is a spherical shell composed of a plurality of petal-shaped check petals 41. The wide end of the check flap 41 is rotatably connected with the infusion tube 2 and is opened outwards or closed inwards under the action of the air pressure inside the infusion tube 2. When the infusion pipeline is opened outwards, the outlet of the infusion pipeline 2 is communicated with the inner cavity of the infusion backflow pipeline 1, when the infusion pipeline is closed inwards, the outlet of the infusion pipeline 2 is closed, and one ends of the tips of the petal-shaped non-return petals 41 are gathered together to form a sealed spherical shell, so that the infusion pipeline is not communicated with the infusion backflow pipeline. The backflow of the waste electrolyte into the infusion pipeline 2 is prevented, and the backflow of the waste electrolyte into the next battery cell along with the next injection operation is further prevented.
Furthermore, the formation device of the utility model also comprises a waste electrolyte discharge pipeline 5, and one end of the waste electrolyte discharge pipeline 5 is communicated with the infusion reflux pipeline 1 through a second liquid outlet 12.
Further, an infusion port ball valve 31 is arranged at the infusion port 3 and used for controlling the opening or closing of the infusion port 3. A liquid outlet ball valve is arranged at the second liquid outlet 12 and used for controlling the opening or closing of the second liquid outlet 12.
Further, the other end of the waste electrolyte discharge pipe 5 is provided with a port ball valve 51 for controlling the opening or closing of the second liquid port 12.
The working principle of matching the transfusion port ball valve and the liquid outlet ball valve is as follows:
opening the ball valve of the transfusion port, and closing the ball valve of the liquid outlet; the electrolyte enters the infusion pipeline from the infusion port; the check valve is opened by the infusion pressure; the electrolyte enters a transfusion backflow pipeline from a transfusion pipeline; electrolyte gets into inside the electric core from infusion return line through first liquid outlet 1, and the second liquid outlet is in the closed condition because the reason of liquid outlet ball valve this moment, and electrolyte can't flow from the second liquid outlet. After the electrolyte is injected, the ball valve of the infusion port is closed, and the ball valve of the liquid outlet is opened. The check valve is not subjected to the internal pressure of the infusion pipeline and cannot be opened when being pressed reversely. And the waste electrolyte pumped out during the vacuum pumping inside the battery core is discharged through a second liquid outlet of the liquid conveying backflow pipeline.
In the description of the present invention, it is to be understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature may be "on" the second feature in direct contact with the second feature, or the first and second features may be in indirect contact via an intermediate. "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is for the purpose of illustrating embodiments of the utility model and is not intended to limit the utility model, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the utility model shall fall within the protection scope of the utility model.
Claims (9)
1. A lithium battery formation device for preventing electrolyte from flowing backwards is characterized by comprising a transfusion backflow pipeline, a transfusion port and a one-way circulation structure; the transfusion port is arranged at one end of the transfusion backflow pipeline; the infusion reflux pipeline is communicated with the infusion pipeline; the infusion port is communicated with the inlet of the infusion pipeline, the outlet of the infusion pipeline is provided with a one-way circulation structure, and the one-way circulation structure enables the electrolyte to flow from the inlet of the infusion pipeline to the outlet of the infusion pipeline only; the liquid conveying backflow pipeline is provided with a first liquid outlet and a second liquid outlet, the first liquid outlet is used for outputting electrolyte to an electric core to be subjected to negative pressure formation, and the second liquid outlet is used for discharging waste electrolyte.
2. A lithium battery formation device for preventing reverse flow of electrolyte as claimed in claim 1, further comprising a waste electrolyte discharge pipe, one end of which is connected to the feed liquid return pipe through a second liquid outlet.
3. The lithium battery formation device for preventing the backflow of electrolyte as claimed in claim 1 or 2, wherein a liquid delivery pipeline is arranged inside the liquid delivery backflow pipeline, an inlet of the liquid delivery pipeline is arranged at one end of the liquid delivery backflow pipeline close to the liquid delivery port, and an outlet of the liquid delivery pipeline extends into the inner cavity of the liquid delivery backflow pipeline.
4. The lithium battery formation device for preventing the backflow of the electrolyte as claimed in claim 1 or 2, wherein when the electrolyte is injected into the battery cell, the one-way circulation structure is opened by the internal air pressure of the liquid conveying pipeline, and the internal cavity of the liquid conveying pipeline is communicated with the internal cavity of the liquid conveying backflow pipeline through the outlet of the liquid conveying pipeline.
5. The lithium battery formation device for preventing the backflow of electrolyte as claimed in claim 4, wherein the one-way flow structure is a spherical shell composed of a plurality of check flaps; the wide end of the check valve is rotationally connected with the infusion pipeline, and the tip of the check valve opens outwards around the rotational connection part under the action of the air pressure in the infusion pipeline.
6. The lithium battery formation device for preventing the backflow of electrolyte as claimed in claim 5, wherein the check valve is petal-shaped.
7. The lithium battery formation device for preventing the backflow of electrolyte as claimed in claim 1 or 2, wherein an infusion port ball valve is provided at the infusion port for controlling the opening or closing of the infusion port.
8. The lithium battery formation device for preventing the backflow of the electrolyte as claimed in claim 1, wherein a second liquid outlet is provided with a liquid outlet ball valve for controlling the opening or closing of the second liquid outlet.
9. The lithium battery formation device for preventing the backflow of the electrolyte as claimed in claim 2, wherein a liquid outlet ball valve is provided at the other end of the waste electrolyte discharge pipe for controlling the opening or closing of the second liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122146763.5U CN215732117U (en) | 2021-09-07 | 2021-09-07 | Lithium battery formation device capable of preventing electrolyte from flowing backwards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122146763.5U CN215732117U (en) | 2021-09-07 | 2021-09-07 | Lithium battery formation device capable of preventing electrolyte from flowing backwards |
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| Publication Number | Publication Date |
|---|---|
| CN215732117U true CN215732117U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122146763.5U Active CN215732117U (en) | 2021-09-07 | 2021-09-07 | Lithium battery formation device capable of preventing electrolyte from flowing backwards |
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| Country | Link |
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| CN (1) | CN215732117U (en) |
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2021
- 2021-09-07 CN CN202122146763.5U patent/CN215732117U/en active Active
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