CN212273702U - Lithium salt pipeline replacement device - Google Patents
Lithium salt pipeline replacement device Download PDFInfo
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- CN212273702U CN212273702U CN202020531656.7U CN202020531656U CN212273702U CN 212273702 U CN212273702 U CN 212273702U CN 202020531656 U CN202020531656 U CN 202020531656U CN 212273702 U CN212273702 U CN 212273702U
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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
In order to overcome the problem that the performance of the battery is deteriorated due to the mixing of water and oxygen in the production process of the existing electrolyte, the utility model provides a lithium salt pipeline replacement device, which comprises a lithium salt pipeline, a vacuum pipeline and a protective gas pipeline; the vacuum pipeline is communicated with the lithium salt pipeline, and a first control device for controlling the on-off of the vacuum pipeline is arranged on the vacuum pipeline; the protective gas pipeline is communicated with the lithium salt pipeline, and a second control device used for controlling the protective gas pipeline to be switched on or switched off is arranged on the protective gas pipeline. The utility model provides a moisture and oxygen content in the lithium salt pipeline can effectively be reduced to lithium salt pipeline replacement device, avoid electrolyte sneak into moisture or oxygen when adding the lithium salt, improve the quality of electrolyte.
Description
Technical Field
The utility model belongs to the technical field of battery production facility, concretely relates to lithium salt pipeline replacement device.
Background
The lithium ion battery is a green high-energy environment-friendly battery appearing in 90 s of the 20 th century, has the outstanding advantages of high working voltage, large specific energy, small self-discharge, long cycle life, quick charge and discharge, no environmental pollution and the like, is an ideal power supply for small and light electronic devices such as cameras, mobile phones, notebook computers, portable measuring instruments and the like, and is also an ideal light high-energy power source for future electric automobiles.
The electrolyte of the lithium battery is an important component of the lithium ion battery, plays a role in conveying and conducting current between the anode and the cathode of the battery, and is a bridge for connecting the anode and the cathode materials. The selection of the electrolyte greatly affects the safety, cycle performance, rate charge and discharge performance, storage performance and the like of the battery. The electrolyte applied to the current commercial lithium battery is basically LiPF6As main electrolyte, carbonate is used as main solvent, and in addition, a small amount of additive is added to improve the performance of the electrolyte.
The lithium ion battery is a relatively complex chemical system, and the reaction process and the result in the chemical system are closely related to moisture. The moisture is out of control or coarsening control, so that the moisture in the battery exceeds the standard, not only can the decomposition of electrolyte lithium salt generate HF gas and the battery expands, but also can generate adverse effects on the film formation and stability of the anode and cathode materials, so that the electrochemical characteristics of the lithium ion battery are deteriorated, such as capacity, internal resistance and charge-discharge characteristics, are obviously deteriorated. The influence of moisture on the performance of the battery is mainly shown in the following aspects: h2The presence of O promotes LiPF in the electrolyte6The decomposition of (2) shortens the battery discharge time; when the water content is more than the required content of the system to form an SEI film, POF is generated on the surface of the SEI film3And precipitation of LiF, resulting inThe internal resistance of the battery is increased; in the electrolyte solvent system, when the moisture content is excessive, the local lack of density and unevenness of the SEI film may be caused, resulting in an increase in capacity fade.
The harm of oxygen to the electrolyte is mainly as follows: firstly, the electrolyte is combustible liquid, and mixed gas formed by oxygen is easy to ignite and explode. Secondly, the existence of oxygen and part of chemical raw materials react with each other to generate oxidation reaction, so that the performance quality of the electrolyte is abnormal.
At present, lithium salt is butted with a barrel through a pipeline for feeding, and the feeding pipeline can be contacted with air during butt joint, so that the moisture content and the oxygen content of the prepared electrolyte can exceed standards. In the production process of the lithium ion battery electrolyte, the control of moisture, oxygen content and the like is of great importance.
SUMMERY OF THE UTILITY MODEL
Sneak into moisture and oxygen in current electrolyte production process and can lead to the problem of battery performance degradation, the utility model provides a lithium salt pipeline replacement device.
The utility model provides an above-mentioned technical problem adopted technical scheme as follows:
the utility model provides a lithium salt pipeline replacement device, which comprises a lithium salt pipeline, a vacuum pipeline and a protective gas pipeline;
the vacuum pipeline is communicated with the lithium salt pipeline, and a first control device for controlling the on-off of the vacuum pipeline is arranged on the vacuum pipeline;
the protective gas pipeline is communicated with the lithium salt pipeline, and a second control device used for controlling the protective gas pipeline to be switched on or switched off is arranged on the protective gas pipeline.
Optionally, the lithium salt pipeline replacement device further includes a controller, the first control device includes a first electromagnetic valve, the second control device includes a second electromagnetic valve, and the controller is electrically connected to the first electromagnetic valve and the second electromagnetic valve respectively.
Optionally, the first control device further comprises a first manual valve, and the first manual valve and the first electromagnetic valve are arranged on the vacuum pipeline at intervals.
Optionally, the second control device further comprises a second manual valve, and the second manual valve and the second electromagnetic valve are arranged on the protective gas pipeline at intervals.
Optionally, the lithium salt pipeline replacement device further comprises an alarm, and the controller is electrically connected with the alarm.
Optionally, the vacuum pipe is connected to a vacuum pump system.
Optionally, the protective gas pipeline is connected to a nitrogen supply system and a filtering device, and the filtering device is connected between the nitrogen supply system and the protective gas pipeline.
Optionally, the filtering device is a 0.1-0.45 micron titanium rod filter.
Optionally, a first gas joint and a second gas joint are arranged on the lithium salt pipeline, the vacuum pipeline is connected with the first gas joint, and the protective gas pipeline is connected with the second gas joint.
Optionally, at least part of the vacuum pipeline is a metal hose, and at least part of the protective gas pipeline is a metal hose.
According to the utility model provides a lithium salt pipeline replacement device inserts vacuum pipe and protective gas pipeline on the lithium salt pipeline, through first controlling means control vacuum pipe is right the lithium salt pipeline carries out the evacuation, then passes through again second controlling means control protective gas pipeline is past inject protective gas in the lithium salt pipeline, through repeated operation many times in order to replace gas in the lithium salt pipeline can effectively reduce moisture and oxygen content in the lithium salt pipeline, avoids electrolyte sneak into moisture or oxygen when adding the lithium salt, improves the quality of electrolyte.
Drawings
Fig. 1 is a lithium salt pipeline replacement device according to an embodiment of the present invention.
The reference numbers in the drawings of the specification are as follows:
1. a vacuum line; 11. a first control device; 111. a first manual valve; 112. a first solenoid valve; 2. a shielding gas conduit; 21. a second control device; 211. a second manual valve; 212. a second solenoid valve; 3. a lithium salt conduit; 31. a first gas joint; 32. and a second air connector.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides a lithium salt pipe replacement device, which includes a lithium salt pipe 3, a vacuum pipe 1 and a shielding gas pipe 2;
the vacuum pipeline 1 is communicated with the lithium salt pipeline 3, and a first control device 11 for controlling the on-off of the vacuum pipeline 1 is arranged on the vacuum pipeline 1;
the protective gas pipeline 2 is communicated with the lithium salt pipeline 3, and a second control device 21 used for controlling the switching-on or switching-off of the protective gas pipeline 2 is arranged on the protective gas pipeline 2.
Lithium salt pipeline replacement device is applied to the lithium salt feeding operation of electrolyte, inserts vacuum pipeline 1 and protective gas pipeline 2 on lithium salt pipeline 3, through first controlling means 11 control vacuum pipeline 1 is right lithium salt pipeline 3 carries out the evacuation, then passes through again second controlling means 21 control protective gas pipeline 2 is past inject protective gas in lithium salt pipeline 3 through multiple repetition operation in order to replace gas in the lithium salt pipeline 3 can effectively reduce moisture and oxygen content in lithium salt pipeline 3, avoids electrolyte to sneak into moisture or oxygen when adding the lithium salt, improves the quality of electrolyte.
In one embodiment, the lithium salt conduit replacing device further comprises a controller (not shown), the first control device 11 comprises a first solenoid valve 112, the second control device 21 comprises a second solenoid valve 212, and the controller is electrically connected to the first solenoid valve 112 and the second solenoid valve 212 respectively.
The controller is used for controlling the opening or closing of the first electromagnetic valve 112 and the second electromagnetic valve 212, and automatic replacement can be realized, so that manpower is greatly saved, and multiple effects of improving efficiency, saving labor, optimizing operation, reducing cost and improving quality are achieved.
In one embodiment, the controller is a PLC program controller.
In an embodiment, the first control device 11 further includes a first manual valve 111, and the first manual valve 111 and the first electromagnetic valve 112 are disposed on the vacuum pipe 1 at an interval.
First manual valve 111 is used for right vacuum tube 1 switch on or close and carry out manual control, avoid first solenoid valve 112 appears unable the closing under the condition of damage vacuum tube 1's problem, simultaneously, first manual valve 111 also plays master switch's effect, works as when first manual valve 111 is in the on-state, first solenoid valve 112 open stop just can act on vacuum tube 1.
In an embodiment, the second control device 21 further includes a second manual valve 211, and the second manual valve 211 and the second electromagnetic valve 212 are disposed on the shielding gas pipe 2 at an interval.
The second manual valve 211 is used for manually controlling the connection or the disconnection of the protective gas pipeline 2, so that the problem that the protective gas pipeline 2 cannot be closed when the second electromagnetic valve 212 is damaged is avoided, meanwhile, the second manual valve 211 also plays a role of a master switch, and when the second manual valve 211 is in an open state, the start and the stop of the second electromagnetic valve 212 can only act on the protective gas pipeline 2.
In one embodiment, the lithium salt conduit replacement device further comprises an alarm (not shown), and the controller is electrically connected with the alarm.
The alarm is used for right lithium salt pipeline 3's replacement state is indicateed, works as the evacuation of lithium salt or fill behind the operation completion of protective gas can by the controller control the alarm is reported to the police and is indicateed, and is concrete, the alarm is audible-visual annunciator.
In an embodiment, a vacuum pump system (not shown) is connected to the vacuum pipe 1.
The vacuum pump system is used for providing the required vacuum degree of the vacuum pipeline 1.
The shielding gas in the shielding gas pipe 2 may be selected from non-reactive gases in the cell such as nitrogen gas or inert gas, and preferably nitrogen gas is used.
In one embodiment, the shielding gas pipe 2 is connected to a nitrogen gas supply system (not shown) and a filtering device (not shown) connected between the nitrogen gas supply system and the shielding gas pipe 2.
The nitrogen supply system is used for supplying nitrogen for the protective gas pipeline 2, the supplied nitrogen needs to be high in purity and extremely low in water oxygen content, specifically, the main content of the nitrogen is required to be more than or equal to 99.99%, the water content is less than or equal to 20ppm, and the oxygen content is less than or equal to 20ppm, and the filtering device is used for filtering the nitrogen to avoid introducing impurities or ions into the nitrogen.
In a more preferred embodiment, the filter device is a 0.1-0.45 micron titanium rod filter.
In one embodiment, the lithium salt pipe 3 is provided with a first gas joint 31 and a second gas joint 32, the vacuum pipe 1 is connected with the first gas joint 31, and the protective gas pipe 2 is connected with the second gas joint 32.
The vacuum pipeline 1 is detachably connected with the first gas joint 31, and the protective gas pipeline 2 is detachably connected with the second gas joint.
In one embodiment, the vacuum pipe 1 is at least partially a metal hose, and the shielding gas pipe 2 is at least partially a metal hose.
By providing the vacuum pipe 1 and the shielding gas pipe 2 as metal hoses, it is possible to reduce the difficulty of joining the vacuum pipe 1 and the shielding gas pipe 2 to the first air joint 31 and the second air joint 32.
The operation of the lithium salt conduit replacement device according to the above preferred embodiment will be described below.
A preparation stage: firstly, a nitrogen supply system is connected with a 0.1-0.45 micron titanium rod filter and a protective gas pipeline 2, the whole pipeline system needs to be cleaned and replaced by nitrogen, the nitrogen pressure is controlled within 0.2MPa, then a vacuum pump system and a vacuum pipeline 1 are connected and need to be cleaned and replaced for later use, a first electromagnetic valve 112 and a first manual valve 111 are additionally arranged on the vacuum pipeline 1, a second electromagnetic valve 212 and a second manual valve 211 are additionally arranged on the protective gas pipeline 2, the vacuum pipeline 1 is arranged on a first air connector 31 of a lithium salt pipeline 3, the protective gas pipeline 2 is arranged on a second air connector 32 of the lithium salt pipeline 3, a PLC program controller is debugged in advance, the requirements of vacuumizing replacement are met, and corresponding time is tested for later use.
The working process is as follows: starting the PLC program controller to start automatic vacuum pumping and nitrogen supplement replacement. Specifically, the method comprises the following steps: vacuumizing (-95 to-100 kpa) - -nitrogen supplement (10 to-50 kpa) -, -vacuumizing (-95 to-100 kpa) -, -nitrogen supplement (10 to-50 kpa), controlling the vacuumizing and nitrogen supplement by time, and controlling an alarm to automatically alarm by sound and light after the program is finished by a PLC (programmable logic controller).
It should be noted that: the nitrogen can be evaporated by liquid nitrogen or used after bottled high-pressure nitrogen is decompressed, and the nitrogen pressure is not limited to only 0.2MPa and can be other pressure values which can be borne by a device system; the pressure of the vacuum pumping and nitrogen supplementing is not limited to the above specified pressure, and may be other pressure values which can be replaced by clean pressure values; the steps and times of the vacuum pumping and nitrogen supplementing are not limited to the steps and times specified above, and other steps or times may be used to meet the process requirements.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A lithium salt pipeline replacement device is characterized by comprising a lithium salt pipeline, a vacuum pipeline and a protective gas pipeline;
the vacuum pipeline is communicated with the lithium salt pipeline, and a first control device for controlling the on-off of the vacuum pipeline is arranged on the vacuum pipeline;
the protective gas pipeline is communicated with the lithium salt pipeline, and a second control device used for controlling the protective gas pipeline to be switched on or switched off is arranged on the protective gas pipeline.
2. The lithium salt conduit displacing device of claim 1, further comprising a controller, wherein the first control device comprises a first solenoid valve, wherein the second control device comprises a second solenoid valve, and wherein the controller is electrically connected to the first solenoid valve and the second solenoid valve, respectively.
3. The lithium salt conduit displacing device of claim 2, wherein the first control means further comprises a first manual valve, and the first manual valve and the first solenoid valve are disposed on the vacuum conduit at a distance.
4. The lithium salt conduit displacing device of claim 2, wherein the second control device further comprises a second manual valve, and the second manual valve and the second solenoid valve are disposed at a distance from each other on the shielding gas conduit.
5. The lithium salt conduit replacement device of claim 2, further comprising an alarm, wherein the controller is electrically connected to the alarm.
6. The lithium salt conduit displacing device of claim 1, wherein a vacuum pump system is connected to the vacuum conduit.
7. The lithium salt conduit displacing device of claim 1, wherein the shielding gas conduit is connected with a nitrogen gas supply system and a filtering device, and the filtering device is connected between the nitrogen gas supply system and the shielding gas conduit.
8. The lithium salt conduit displacement device of claim 7, wherein the filter device is a 0.1-0.45 micron titanium rod filter.
9. The lithium salt conduit displacement device of claim 1, wherein the lithium salt conduit is provided with a first gas connector and a second gas connector, the vacuum conduit is connected to the first gas connector, and the shielding gas conduit is connected to the second gas connector.
10. The lithium salt conduit replacement device of claim 1, wherein the vacuum conduit is at least partially a metal hose, and the shielding gas conduit is at least partially a metal hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020531656.7U CN212273702U (en) | 2020-04-10 | 2020-04-10 | Lithium salt pipeline replacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020531656.7U CN212273702U (en) | 2020-04-10 | 2020-04-10 | Lithium salt pipeline replacement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212273702U true CN212273702U (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020531656.7U Active CN212273702U (en) | 2020-04-10 | 2020-04-10 | Lithium salt pipeline replacement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212273702U (en) |
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2020
- 2020-04-10 CN CN202020531656.7U patent/CN212273702U/en active Active
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