CN116864938A - Electrolyte bubble removing device, electrolyte injecting equipment and battery production line - Google Patents
Electrolyte bubble removing device, electrolyte injecting equipment and battery production line Download PDFInfo
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- CN116864938A CN116864938A CN202311126488.8A CN202311126488A CN116864938A CN 116864938 A CN116864938 A CN 116864938A CN 202311126488 A CN202311126488 A CN 202311126488A CN 116864938 A CN116864938 A CN 116864938A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 214
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 408
- 238000003860 storage Methods 0.000 claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 70
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims 2
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 18
- 238000007872 degassing Methods 0.000 description 17
- 230000037452 priming Effects 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0036—Flash degasification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/673—Containers for storing liquids; Delivery conduits therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The application relates to the technical field of battery manufacturing, and particularly discloses an electrolyte bubble removing device, liquid injection equipment and a battery production line, wherein the electrolyte bubble removing device comprises: a liquid storage tank; an electrolyte delivery line; the sealing tank is communicated with the liquid storage tank through an electrolyte conveying pipeline and is provided with a liquid outlet and an air outlet, the air outlet is positioned above the liquid outlet along the vertical direction, and the bottom of the liquid storage tank is higher than the air outlet; and the exhaust pipe is communicated with the exhaust port and is provided with a stop valve, and the stop valve can be used for switching on or stopping a gas path of the exhaust pipe. According to the electrolyte bubble removing device provided by the application, bubbles separated out again from the electrolyte in the electrolyte conveying pipeline are removed for the second time by utilizing the sealing tank and the exhaust pipe, so that the bubbles in the electrolyte are further removed.
Description
Technical Field
The application relates to the technical field of batteries, in particular to an electrolyte bubble removing device, liquid injection equipment and a battery production line.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.
The liquid injection process of the battery is a key technical process for battery production, in the liquid injection process, the liquid injection amount of the electrolyte is a key index for measuring the quality of the battery, and if the liquid injection amount of the electrolyte does not reach the standard, the performance of the battery can be seriously affected.
In the conventional equipment, bubbles are generally removed from a liquid storage tank, however, in the liquid injection process, bubbles still exist in the electrolyte in an electrolyte conveying pipeline and are precipitated again, and the bubbles precipitated again are accumulated in a pipeline and then injected into a battery along with the electrolyte, so that the liquid injection amount in the battery does not reach the standard.
Disclosure of Invention
In view of the above problems, the present application provides an electrolyte bubble removal device, which solves the problems of separating bubbles from the electrolyte in an electrolyte conveying pipeline and injecting the bubbles into a battery.
The first aspect of the present application provides an electrolyte bubble removal device, comprising: a liquid storage tank; an electrolyte delivery line; the sealing tank is communicated with the liquid storage tank through an electrolyte conveying pipeline and is provided with a liquid outlet and an air outlet, the air outlet is positioned above the liquid outlet along the vertical direction, and the bottom of the liquid storage tank is higher than the air outlet; and the exhaust pipe is communicated with the exhaust port and is provided with a stop valve, and the stop valve is used for switching on or stopping a gas path of the exhaust pipe.
When the electrolyte in the electrolyte conveying pipeline is separated out bubbles again, the bubbles move into the sealing tank under the drive of the electrolyte and move towards the top of the sealing tank under the influence of gravity, the bubbles continuously move to enter the exhaust pipe through the exhaust port, when the exhaust pipe is filled with the bubbles, the stop valve is communicated with the gas path of the exhaust pipe, and the bubbles in the exhaust pipe are discharged under the pressure of the electrolyte so as to further eliminate the bubbles in the electrolyte.
In some embodiments of the application, the electrolyte bubble removal device further comprises a stirring paddle disposed on the liquid storage tank or a vacuum device in communication with the liquid storage tank.
The liquid storage tank is used for carrying out preliminary degassing on the electrolyte, the electrolyte after preliminary degassing flows into the sealing tank through the electrolyte conveying pipeline,
in some embodiments of the present application, the electrolyte bubble removing device further comprises a liquid storage tank, the liquid storage tank and the sealing tank are sequentially communicated, the electrolyte conveying pipeline comprises a first pipeline and a second pipeline, two ends of the first pipeline are respectively communicated with the liquid storage tank and the liquid storage tank, and two ends of the second pipeline are respectively communicated with the liquid storage tank and the sealing tank.
The electrolyte tank is arranged between the sealing tank and the liquid storage tank so as to store the electrolyte after degassing from the liquid storage tank, and the electrolyte can be continuously supplied to the sealing tank, so that the continuity of the liquid injection process of the battery can be maintained.
In some embodiments of the application, the bottom of the reservoir is positioned higher than the vent.
The position of the liquid storage tank is higher than the exhaust port, and a communicating vessel structure is formed among the liquid storage tank, the electrolyte conveying pipe and the sealing tank, so that the pressure difference exists between the liquid level of the liquid storage tank and the liquid level of the sealing tank based on the liquid level difference between the liquid storage tank and the sealing tank, and when the cut-off valve is communicated with the exhaust pipe, the liquid level in the sealing tank can move upwards under the action of the driving force of the pressure difference, so that bubbles stored at the top of the sealing tank are discharged out of the sealing tank and the exhaust pipe.
In some embodiments of the application, the electrolyte bubble removal device further comprises a residual liquid tank, and one end of the exhaust pipe away from the exhaust port is communicated with the residual liquid tank.
The raffinate tank is used for receiving electrolyte flowing out of the exhaust pipe in the exhaust process and recycling the discharged electrolyte.
In some embodiments of the present application, the number of the liquid outlets is plural, and the plural liquid outlets are sequentially arranged at intervals along the circumferential direction of the seal pot.
The sealing tank is provided with a plurality of liquid outlets, so that electrolyte is supplied to a plurality of batteries simultaneously through the liquid outlets, and the liquid injection efficiency in the battery production process is improved.
In some embodiments of the application, a liquid outlet is provided near the bottom of the sealed can, the liquid outlet being for outputting electrolyte. The liquid outlet is arranged near the bottom of the sealing tank to reduce the probability of bubble discharge through the liquid outlet.
In some embodiments of the application, each liquid outlet is provided with a liquid outlet pipe communicated with the liquid outlet, and one end of the liquid outlet pipe away from the liquid outlet pipe is inclined towards the lower part of the sealing tank. Through the one end slope that deviates from the liquid outlet with the drain pipe towards the bottom of seal pot, when making there is the bubble in the drain pipe, can follow the inner wall of drain pipe and remove to the liquid outlet and get into the seal pot under the effect of gravity, reduce the bubble and pour into the probability in the battery through liquid outlet and drain pipe.
In some embodiments of the application, the sealing tank is provided with a liquid inlet, the electrolyte conveying pipe is communicated with the sealing tank through the liquid inlet, and the liquid inlet and the liquid outlet are arranged at intervals of a preset angle along the circumferential direction of the sealing tank, and the preset angle ranges from 120 degrees to 180 degrees.
The liquid inlet and the liquid outlet are arranged along the circumferential direction of the sealing tank at intervals, so that the liquid inlet and the liquid outlet are kept at a long distance, and the bubbles mixed with the electrolyte flowing out of the liquid inlet are directly brought into the liquid outlet.
In some embodiments of the application, the bottom wall of the seal pot is configured as a first raised structure raised towards the interior of the seal pot, the first raised structure facing the interior side of the seal pot being configured as a convex arc surface; and/or the liquid inlet is higher than the liquid outlet.
In the process that the electrolyte entering the sealing tank from the liquid inlet flows to the liquid outlet, the convex cambered surface has a certain blocking effect on the flow of the electrolyte so as to slow down the flow rate of the electrolyte entering the sealing tank from the liquid inlet when flowing to the liquid outlet, and reduce the probability that bubbles mixed in the electrolyte enter the liquid outlet and the liquid outlet pipe under the driving of the electrolyte. The convex cambered surface has a certain guiding function on the electrolyte flowing through the convex cambered surface, and reduces the flow rate change rate of the electrolyte flowing through the convex cambered surface, so that the electrolyte flows smoothly in the sealing tank and has stable flow rate. The position of the liquid inlet is higher than that of the liquid outlet, and the electrolyte flowing into the sealing tank from the liquid inlet needs to move downwards to enter the liquid outlet, so that bubbles mixed in the electrolyte can move upwards under the influence of gravity in the process of flowing downwards of the electrolyte, and the moving direction of the bubbles is opposite to that of the electrolyte, so that the probability of the bubbles moving into the liquid outlet is reduced.
In some embodiments of the application, the electrolyte bubble removal device further comprises a throttle valve, the throttle valve being provided in the exhaust pipe.
The throttle valve is used for adjusting the exhaust speed of the exhaust pipe, so as to control the flow rate of the electrolyte in the exhaust pipe, reduce the discharge amount of the electrolyte passing through the exhaust pipe, and indirectly control the flow rate of the electrolyte in the electrolyte conveying pipe by controlling the flow rate of the electrolyte in the exhaust pipe, so that the flow rate of the electrolyte is uniform and stable, and the pressure of the electrolyte in the electrolyte conveying pipe is stable, thereby reducing the discharge amount of bubbles in the electrolyte conveying pipe.
In some embodiments of the application, the top wall of the seal pot is configured as a second protruding structure protruding towards the outside of the seal pot, the side of the second protruding structure facing the inside of the seal pot is configured as a concave arc surface, and the exhaust port is arranged at the arc bottom position of the concave arc surface.
The inner top surface of the sealing tank is configured into a concave arc structure, so that bubbles can smoothly move upwards to the top of the sealing tank and converge towards the exhaust port, and the bubbles can smoothly enter the exhaust pipe through the exhaust port.
In some embodiments of the application, the exhaust pipe comprises a first section and a second section which are sequentially communicated, wherein the first section extends along a first direction and is communicated with the exhaust port, and the first direction is parallel to the vertical direction or forms an included angle smaller than 90 degrees with the vertical direction; the electrolyte bubble removing device further comprises a liquid level detecting device, wherein the liquid level detecting device is arranged on the first section and located between the cut-off valve and the exhaust port, and the liquid level detecting device is used for detecting liquid level information of electrolyte in the first section.
Through setting up the liquid level information in the blast pipe of liquid level detection device detection first section, can judge the bubble memory space in the first section according to liquid level information, when the memory space of bubble is great, the blast pipe is carried out in stop valve intercommunication blast pipe, and after the bubble in the first section was discharged, the blast pipe was stopped to the stop valve stop blast.
In some embodiments of the present application, the number of the liquid level detecting devices is two, the two liquid level detecting devices include a first liquid level detecting device and a second liquid level detecting device which are arranged at intervals in the first direction on the first section, the first liquid level detecting device is located between the air outlet and the second liquid level detecting device, and the liquid level information includes a lower liquid level limit measured by the first liquid level detecting device and an upper liquid level limit measured by the second liquid level detecting device.
Whether the exhaust pipe of the first section is full of bubbles or electrolyte can be judged more accurately through the lower liquid level limit and the upper liquid level limit, and the cut-off valve is communicated or cuts off the exhaust pipe according to the lower liquid level limit and the upper liquid level limit so that the exhaust control process is more accurate.
In some embodiments of the present application, the electrolyte bubble removing device further includes a control device electrically connected to the liquid level detecting device and the cut-off valve, respectively, and the control device can control the cut-off valve to switch on or cut off the gas path of the exhaust pipe based on the liquid level information.
The control device automatically controls the cut-off valve to switch between a communicating state and a cut-off state based on the liquid level information, so that the automatic control of the exhaust process is realized.
A second aspect of the present application proposes a liquid injection apparatus comprising a liquid injection pipe and the electrolyte bubble removal device of any one of the first aspects, the liquid injection pipe communicating with a liquid outlet of a seal pot in the electrolyte bubble removal device.
The liquid injection device provided in the second aspect of the present application includes the electrolyte bubble removing apparatus according to the first aspect, so that the liquid injection device has the technical effects of any of the above embodiments, and will not be described herein.
In some embodiments of the application, the priming device further comprises: the liquid injection pump is arranged on the liquid injection pipe; the liquid injection cup is communicated with the liquid injection pipe.
The liquid filling pump is used for sucking the electrode liquid after degassing in the sealed tank into the liquid filling cup so as to perform the liquid filling process of the battery.
A third aspect of the application proposes a battery production line including the liquid injection apparatus in the second aspect.
An embodiment of the present application provides a battery production line, which includes the liquid injection device according to the embodiment of the first aspect, so that the battery production line has the technical effects of any one of the above embodiments, and is not described herein again.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Fig. 1 schematically shows a schematic structure of an electrolytic solution bubble removal device according to an embodiment of the present application;
FIG. 2 schematically shows a schematic structural view of a seal pot according to an embodiment of the present application;
FIG. 3 schematically shows a schematic cross-sectional view of the portion A-A of FIG. 2;
FIG. 4 schematically shows a schematic structure of a liquid injection apparatus according to an embodiment of the present application;
fig. 5 schematically shows a block diagram of the electrical connections of the control device, the liquid level detection device and the shut-off valve according to an embodiment of the application.
The reference numerals are as follows:
100. bubble removing device for electrolyte; 1001. a liquid storage cabinet;
10. a liquid storage tank; 11. An electrolyte delivery line; 111. a first pipeline; 112. a second pipeline; 12. a sealed tank; 121. an exhaust port; 122. a liquid outlet; 124. a first bump structure; 1241. a convex cambered surface; 125. a second bump structure; 1251. a concave cambered surface; 1201. a top wall; 1202. a bottom wall; 1203. a sidewall;
13. A liquid storage tank; 14. an exhaust pipe; 141. a first segment; 142. a second segment;
15. a shut-off valve; 16. a residue tank; 17. a liquid outlet pipe; 18. a throttle valve;
21. a first liquid level detection device; 22. a second liquid level detection device;
70. a control device; 71. a memory; 72. a processor;
200. a liquid injection device;
201. a liquid injection pipe; 202. a liquid injection pump; 203. and a liquid injection cup.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.
The liquid injection procedure is an important link in the manufacturing process of the lithium ion battery, and the liquid injection precision is directly related to the cycle performance, the safety performance, the consistency and the like of lithium ions. Because the electrolyte is a mixture composed of a plurality of substances, a lot of gas and entrained bubbles exist in the electrolyte due to the uneven dispersion among the substances, different proportions, additives and the like, and the injection pump sucks the solution with the same volume but the quality is deviated. The liquid injection pump can not discharge bubbles in the pipe, and repeated liquid discharge causes electrolyte waste and cost increase. In particular to a liquid injection system with long liquid injection pipelines and small liquid injection amount, in the liquid injection process, the electrolyte in the electrolyte conveying pipeline still has the condition of re-precipitation of bubbles, and the re-precipitated bubbles are accumulated in the pipeline and then injected into a battery along with the electrolyte, so that the liquid injection amount in the battery does not reach the standard.
According to the electrolyte bubble removing device provided by the application, the sealing tank is additionally arranged on the electrolyte conveying pipeline, the exhaust port and the exhaust pipe for exhausting are arranged at the top of the sealing tank, bubbles which are separated out again in the electrolyte conveying pipeline are exhausted through the exhaust port and the exhaust pipe, the electrolyte is subjected to secondary degassing, the gas capacity in the electrolyte is further reduced, the probability that the bubbles are injected into the battery along with the electrolyte is reduced, and the product quality of the battery is improved.
According to some embodiments of the present application, referring to fig. 1, 2 and 3, an electrolyte bubble removal device 100 is provided, wherein the electrolyte bubble removal device 100 includes a liquid storage tank 10, a seal tank 12, an electrolyte delivery line 11, an exhaust pipe 14 and a shut-off valve 15. Specifically, the sealed can 12 includes a top wall 1201, a side wall 1203, and a bottom wall 1202 that are connected in sequence, and a sealed can body structure is enclosed by the top wall 1201, the side wall 1203, and the bottom wall 1202 together. The seal pot 12 is communicated with the liquid storage pot 10 through the electrolyte conveying pipeline 11, the seal pot 12 is provided with a liquid outlet 122 and an exhaust port 121, the exhaust port 121 is positioned above the liquid outlet 122, specifically, the liquid outlet 122 is arranged close to the bottom of the seal pot 12, the exhaust port 121 is positioned at the top of the seal pot 12, and the bottom of the liquid storage pot 10 is higher than the exhaust port 121. The exhaust pipe 14 communicates with the exhaust port 121, and the shutoff valve 15 is provided in the exhaust pipe 14, and the shutoff valve 15 can switch on or off the gas path of the exhaust pipe 14.
The shut-off valve 15 is also called a closed valve, and the shut-off valve 15 is used for switching on or shutting off the gas path of the exhaust pipe 14, and the shut-off valve 15 comprises, but is not limited to, a gate valve, a shut-off valve, a plug valve, a ball valve, a butterfly valve and a pneumatic diaphragm valve, and it is understood that the shut-off valve 15 can be a manual shut-off valve or an automatic shut-off valve.
The arrangement that the bottom of the liquid storage tank 10 is higher than the exhaust port 121 means that the liquid storage tank 10 is located at a position higher than the exhaust port 121 along the vertical direction, so that the liquid level of the electrolyte in the liquid storage tank 10 and the liquid level of the electrolyte in the sealing tank 12 have a height difference, and further, a pressure difference exists between the liquid level of the liquid storage tank 10 and the liquid level of the sealing tank 12, when the cut-off valve 15 is communicated with the exhaust pipe 14, the liquid level of the electrolyte in the sealing tank 12 moves upwards under the action of the pressure difference, and bubbles accumulated at the top of the sealing tank 12 are discharged through the exhaust port 121 and the exhaust pipe 14.
The liquid storage tank 10 is used for primarily degassing electrolyte in the liquid storage tank 10, the electrolyte after the primary degassing flows into the sealing tank 12 through the electrolyte conveying pipeline 11, when bubbles are separated out again from the electrolyte in the electrolyte conveying pipeline 11, the bubbles move into the sealing tank 12 under the driving of the electrolyte and move towards the top of the sealing tank 12 under the influence of gravity, the bubbles continuously move into the exhaust pipe 14 through the exhaust port 121, when the exhaust pipe 14 is filled with the bubbles, the gas path of the exhaust pipe 14 is communicated by the cut-off valve 15, and the bubbles in the exhaust pipe 14 are discharged under the pressure of the electrolyte so as to further eliminate the bubbles in the electrolyte.
In some embodiments of the application, the electrolyte bubble removal device further comprises a stirring paddle disposed on the liquid storage tank or a vacuum device in communication with the liquid storage tank.
The liquid storage tank 10 is used for preliminary degassing of the electrolyte, and specifically, the degassing method of the liquid storage tank 10 may employ at least one of a stirring method and a vacuum degassing method. For example, in some embodiments, the tank body of the liquid storage tank 10 for containing the electrolyte is provided with a stirring paddle, the stirring paddle is rotatably arranged inside the tank body, and the electrolyte in the tank body is stirred by the stirring paddle to perform preliminary degassing on the electrolyte.
In some embodiments, the preliminary degassing of the electrolyte is achieved by evacuating the reservoir with an evacuating device.
The electrolyte delivery line 11 connects the liquid storage tank 10 and the seal tank 12, so that the electrolyte after preliminary degassing of the liquid storage tank 10 can flow into the seal tank 12 through the electrolyte delivery line 11 to perform secondary degassing.
In some embodiments of the present application, as shown in fig. 1, the electrolyte bubble removal device 100 further includes a liquid storage tank 13, and the liquid storage tank 10, the liquid storage tank 13, and the sealing tank 12 are sequentially connected. Specifically, the electrolyte delivery pipe 11 includes a first pipe 111 and a second pipe 112, both ends of the first pipe 111 are respectively communicated with the liquid storage tank 10 and the liquid storage tank 13, and both ends of the second pipe 112 are respectively communicated with the liquid storage tank 13 and the seal tank 12.
The reservoir tank 13 is for receiving and storing the electrolyte after preliminary degassing from the reservoir tank 10, and since the reservoir tank 10 interrupts the outward output of the electrolyte during degassing, there is a problem in that the outward output of the electrolyte from the reservoir tank 10 is discontinuous, so that the electrolyte after the degassing from the reservoir tank 10 can be stored and the electrolyte can be continuously supplied to the seal tank 12 by providing the reservoir tank 13 between the seal tank 12 and the reservoir tank 10, so that the continuity of the filling process of the battery can be maintained.
In some embodiments of the present application, as shown in fig. 1 and 3, the liquid storage tank 13 is higher than the air outlet 121. The liquid storage tank 13 is arranged at a position higher than the exhaust port 121, so that a communicating vessel structure is formed among the liquid storage tank 13, the electrolyte conveying pipe and the sealing tank 12, and therefore, based on the liquid level difference between the liquid storage tank 13 and the sealing tank 12, a pressure difference exists between the liquid level of the liquid storage tank 13 and the liquid level of the sealing tank 12, when the cut-off valve 15 is communicated with the gas path of the exhaust pipe 14, the liquid level in the sealing tank 12 can move upwards under the action of the driving force of the pressure difference, and bubbles stored at the top of the sealing tank 12 are discharged out of the sealing tank 12 and the exhaust pipe 14.
In some embodiments of the present application, as shown in fig. 1, the electrolyte bubble removal device 100 further includes a raffinate tank 16, and an end of the vent tube 14 facing away from the vent 121 communicates with the raffinate tank 16. The residual liquid tank 16 is used for receiving the electrolyte flowing out of the exhaust pipe 14 during the exhaust process and recycling the discharged electrolyte.
In some embodiments of the present application, as shown in fig. 1 and 3, the number of the liquid outlets 122 is plural, and the plural are sequentially arranged at intervals along the circumferential direction of the seal pot 12. In the present embodiment, the seal pot 12 has a cylindrical structure, the number of the liquid outlets 122 is 6, and the 6 liquid outlets 122 are sequentially arranged at intervals along the circumferential direction of the seal pot 12, and the intervals between any two adjacent liquid outlets 122 are equal.
Providing a plurality of liquid outlets 122 in the sealed pot 12 is beneficial to supplying electrolyte to a plurality of batteries through the plurality of liquid outlets 122 at the same time, and improves the liquid injection efficiency in the battery production process.
In some embodiments of the present application, a liquid outlet 122 is provided near the bottom of the sealed can 12, the liquid outlet 122 being used to output electrolyte to the battery. The liquid outlet 122 is positioned near the bottom of the sealed pot 12 to reduce the probability of air bubbles being expelled through the liquid outlet 122.
In some embodiments of the present application, as shown in fig. 1, 2 and 3, each of the liquid outlets 122 is provided with a liquid outlet pipe 17 communicating with the liquid outlet 122, and an end of the liquid outlet pipe 17 facing away from the liquid outlet 122 is inclined toward the lower side of the sealed pot 12.
The liquid outlet pipe 17 is an inner tooth pipe welded at the liquid outlet 122, and the liquid outlet pipe 17 is inclined downwards by 10-15 degrees. By inclining the end of the liquid outlet pipe 17 away from the liquid outlet 122 towards the lower side of the sealed tank 12, when bubbles exist in the liquid outlet pipe 17, the bubbles can move towards the liquid outlet 122 along the inner wall of the liquid outlet pipe 17 under the action of gravity and enter the sealed tank 12, so that the probability of injecting the bubbles into the battery through the liquid outlet 122 and the liquid outlet pipe 17 is reduced.
In some embodiments of the present application, as shown in fig. 3, the bottom wall 1202 of the seal pot 12 is configured as a first protrusion structure 124 protruding toward the interior of the seal pot, one side of the first protrusion structure 124 facing the interior of the seal pot 12 is configured as a convex arc surface 1241, the inner bottom surface of the seal pot 12 is configured as a convex arc surface 1241, the seal pot 12 is provided with a liquid inlet, an electrolyte delivery pipe is communicated with the seal pot 12 through the liquid inlet, the liquid inlet and the liquid outlet 122 are respectively located at two sides of the convex arc surface 1241 along the radial direction of the seal pot, or are arranged at intervals of preset angles along the circumferential direction of the seal pot, and the preset angles have values ranging from 120 ° to 180 °, for example, the preset angles may be 120 °, 125 °, 130 °, 135 °, 140 °, 150 °, 165 °, 180 °, etc.
The convex arc surface 1241 is a hemispherical shell-like structure formed by integrally protruding the bottom shell of the sealed pot 12 toward the inside of the sealed pot 12. In the process that the electrolyte entering the sealing tank 12 from the liquid inlet flows to the liquid outlet 122, the convex cambered surface 1241 has a certain blocking effect on the flow of the electrolyte so as to slow down the flow rate of the electrolyte entering the sealing tank 12 from the liquid inlet when flowing to the liquid outlet 122, and reduce the probability that bubbles mixed in the electrolyte enter the liquid outlet 122 and the liquid outlet pipe 17 under the driving of the electrolyte. The side of the convex arc surface 1241, which is positioned in the sealing tank 12, is a spherical surface, so that the electrolyte flowing through the convex arc surface 1241 has a certain guiding function, and the flow rate change rate of the electrolyte flowing through the convex arc surface 1241 is reduced, so that the electrolyte flows smoothly in the sealing tank 12 and the flow rate is stable.
In some embodiments of the present application, as shown in fig. 3, the inlet is located higher than the outlet 122. The purpose of the liquid inlet being higher than the liquid outlet 122 is that the electrolyte flowing into the sealed pot 12 from the liquid inlet needs to move downwards to enter the liquid outlet 122, and in the process of the electrolyte flowing downwards, bubbles mixed in the electrolyte move upwards under the influence of gravity, so that the moving direction of the bubbles is opposite to the moving direction of the electrolyte, and the probability of the bubbles moving into the liquid outlet 122 is reduced.
In some embodiments of the present application, as shown in fig. 1, the electrolyte bubble removal device 100 further includes a throttle valve 18, the throttle valve 18 being provided in the exhaust pipe 14.
The throttle valve 18 is a valve that controls the flow rate of gas or electrolyte in the exhaust pipe 14 by changing the throttle cross section or throttle length. The throttle valve 18 includes, but is not limited to, a plug type throttle valve 18, an orifice plate type throttle valve 18, a needle type throttle valve 18.
The throttle valve 18 is used for adjusting the exhaust speed of the exhaust pipe 14, so as to control the flow rate of the electrolyte in the exhaust pipe 14, so as to reduce the discharge amount of the electrolyte passing through the exhaust pipe 14, and indirectly control the flow rate of the electrolyte in the electrolyte conveying pipe by controlling the flow rate of the electrolyte in the exhaust pipe 14, so that the flow rate of the electrolyte is uniform and stable, and the pressure of the electrolyte in the electrolyte conveying pipe is stable, so that the precipitation amount of bubbles in the electrolyte conveying pipe is reduced.
In some embodiments of the present application, as shown in fig. 1 and 3, the top wall 1201 of the sealing can 12 is configured as a second protrusion structure 125 protruding toward the outside of the sealing can 12, a side of the second protrusion structure 125 facing the inside of the sealing can is configured as a concave arc surface, and the exhaust port 121 is provided at an arc bottom position of the concave arc surface 1251.
The concave arc surface 1251 is a hemispherical shell-shaped structure formed by integrally protruding the inner top surface of the sealing tank 12 from the inside to the outside of the sealing tank 12, so that the arc bottom position of the concave arc surface 1251 is positioned at the center of the concave arc surface 1251, and bubbles at various positions in the sealing tank 12 are gathered towards the top position positioned at the center of the concave arc surface 1251 under the guidance of the inner wall of the concave arc surface 1251. The top position of the concave arc surface 1251 is the highest position of the concave arc surface 1251 along the vertical direction.
The configuration of the top of the seal pot 12 as the concave arc surface 1251 is advantageous in that bubbles move upward to the top of the seal pot 12 more smoothly and converge toward the exhaust port 121, so that the bubbles can enter into the exhaust pipe 14 through the exhaust port 121 more smoothly.
In some embodiments of the present application, as shown in fig. 1 and 3, the exhaust pipe 14 includes a first section 141 and a second section 142 that are sequentially communicated, the first section 141 extending in a first direction and communicating with the exhaust port 121, the first direction being parallel to the vertical direction or forming an angle smaller than 90 ° with the vertical direction; the electrolyte bubble removing device 100 further includes a liquid level detecting device disposed between the first segment 141 and the exhaust port 121 and configured to detect liquid level information of the electrolyte in the first segment 141, and the valve 15 is configured to switch on or off the gas path of the exhaust pipe 14 based on the liquid level information.
The first section 141 and the second section 142 are different parts along the axial direction of the exhaust pipe 14, the first section 141 is arranged along the vertical direction, when bubbles in the first section 141 are mixed with electrolyte, the bubbles can move to the upper position of the exhaust pipe 14 of the first section 141 under the influence of gravity, and the electrolyte is positioned below the exhaust pipe 14, so that the separation of the bubbles in the first section 141 from the electrolyte is realized.
The liquid level detection device is used for detecting the liquid level information of the electrolyte in the first section 141, and the liquid level detection device comprises, but is not limited to, a magnetic flap liquid level meter, a pressure liquid level transmitter, a capacitance liquid level meter, an electric contact liquid level meter, a magnetic-sensitive bicolor electronic liquid level meter and a differential pressure liquid level meter. For example, if the liquid level detection device is a capacitive liquid level meter, the capacitive liquid level meter has a metal rod inserted into the first section 141 of the exhaust pipe 14, the metal rod being one pole of the capacitance, and the pipe wall of the exhaust pipe 14 being the other pole of the capacitance. The medium between the two electrodes is electrolyte and the gas on the electrolyte. Because the dielectric constant of the electrolyte is different from that of the gas on the liquid surface, when the liquid level rises, the total dielectric constant value between the two electrodes of the capacitance type liquid level meter is increased, and thus the capacitance is increased. Conversely, as the liquid level decreases, the dielectric constant value decreases and the capacitance decreases. Therefore, the capacitance type liquid level meter can measure the liquid level by the change of the capacitance between the two electrodes, and thus can measure the reserve of bubbles in the exhaust pipe 14 in the first section 141.
In some embodiments, the stop valve 15 is a manual stop valve capable of being manually operated, the liquid level detection device is a liquid level meter with a display unit, such as a magnetic flap liquid level meter or a magnetic-sensitive electronic dual-color liquid level meter, and the like, taking the magnetic-sensitive electronic dual-color liquid level meter as an example, the display part of the magnetic-sensitive electronic dual-color liquid level meter adopts a high-brightness LED dual-color luminous tube to form a columnar display screen, the upper limit and the lower limit of the liquid level can be realized through the red-green change of an LED light column, the upper limit of the liquid level indicates that the exhaust pipe 14 of the first section 141 is filled with electrolyte, the lower limit of the liquid level indicates that the exhaust pipe 14 of the first section 141 is filled with bubbles, therefore, an operator can manually operate the stop valve 15 to communicate with the gas path of the exhaust pipe 14 according to the lower limit of the liquid level displayed by the display screen to realize the exhaust, or manually operate the stop valve 15 to stop the gas path of the exhaust pipe 14 according to the upper limit of the liquid level displayed by the display screen.
By arranging the liquid level detection device to detect the liquid level information in the exhaust pipe 14 of the first section 141, the storage amount of bubbles in the first section 141 can be judged according to the liquid level information, when the storage amount of bubbles is large, the cut-off valve 15 is communicated with the gas path of the exhaust pipe 14 to exhaust, and when the bubbles in the first section 141 are exhausted, the cut-off valve 15 cuts off the gas path of the exhaust pipe 14 to stop exhausting.
In some embodiments of the present application, as shown in fig. 1, the number of the liquid level detecting devices is two, the two liquid level detecting devices include a first liquid level detecting device 21 and a second liquid level detecting device 22 which are arranged at intervals along a first direction in a first section 141, the first liquid level detecting device 21 is located between the air outlet 121 and the second liquid level detecting device 22, the liquid level information includes a lower liquid level limit measured by the first liquid level detecting device 21 and an upper liquid level limit measured by the second liquid level detecting device 22, the gas path of the exhaust pipe 14 is connected based on the lower liquid level limit cut-off valve 15, and the gas path of the exhaust pipe 14 is cut off based on the upper liquid level limit cut-off valve 15.
The lower liquid level limit means that the liquid level of the electrolyte in the exhaust pipe 14 of the first section 141 is lower than the first liquid level detecting device 21, and at this time, the first liquid level detecting device 21 is out of contact with the electrolyte and is in contact with the gas in the exhaust pipe 14, and when the liquid level in the exhaust pipe 14 is at the lower liquid level limit, it is indicated that the exhaust pipe 14 in the first section 141 is filled with the gas.
The upper liquid level limit refers to that the liquid level of the electrolyte in the exhaust pipe 14 of the first section 141 is higher than the second liquid level detecting device 22, and at this time, the second liquid level detecting device 22 contacts with the electrolyte, and when the liquid level in the exhaust pipe 14 is at the upper liquid level limit, it is indicated that the exhaust pipe 14 in the first section 141 is full of the electrolyte.
Whether the exhaust pipe 14 of the first section 141 is full of bubbles or electrolyte can be more accurately judged through the lower liquid level limit and the upper liquid level limit, and the cut-off valve 15 controls the gas path communicated with or cut off the exhaust pipe 14 according to the lower liquid level limit and the upper liquid level limit so that the exhaust control process is more accurate.
In some embodiments of the present application, as shown in fig. 5, the electrolyte bubble removing apparatus 100 further includes a control device electrically connected to the liquid level detecting device and the cut-off valve 15, respectively, and the control device can control the cut-off valve 15 to switch on or cut off the gas path of the exhaust pipe 14 based on the liquid level information.
The control device 70 comprises a memory 71 and at least one processor 72, wherein the memory 71 stores programs or instructions that are executable on the processor 72, the processor 72 is electrically connected with the liquid level detection device and the shut-off valve 15 respectively,
to facilitate the transmission of electrical signals, which may be data signals, such as information about a lower or upper level limit, between the processor 72 and the level detection device and the shut-off valve 15, or control signals, such as signals controlling the operation of the shut-off valve 15. In detail, the processor 72 controls the cut-off valve 15 to perform the operation of the gas path of the communicating or segment exhaust pipe 14 based on the liquid level information measured by the liquid level detecting device when executing the program or instruction.
The control device automatically controls the cut-off valve 15 to switch between the two states of connection and cut-off based on the liquid level information, and realizes the automatic control of the exhaust process.
According to a second aspect of the present application, there is provided a liquid injection apparatus 200, as shown in fig. 4, the liquid injection apparatus 200 includes a liquid injection pipe 201 and the electrolyte bubble removal device 100 of any one of the first aspect, and the liquid injection pipe 201 communicates with the liquid outlet 122 of the seal pot 12 in the electrolyte bubble removal device 100. The electrolyte bubble removal device 100 according to the embodiment of the first aspect has the technical effects of any of the above embodiments, and will not be described in detail herein.
In some embodiments of the present application, the priming apparatus 200 further comprises a priming pump 202 and a priming cup 203, the priming pump 202 being provided to the priming tube 201, the priming cup 203 being in communication with an end of the priming tube 201 facing away from the sealed pot 12. The liquid filling pump 202 pumps the degassed electrode liquid in the sealed can 12 into a liquid filling cup 203 to perform a liquid filling process of the battery.
A third aspect of the present application proposes a battery production line including the liquid injection apparatus 200 in the second aspect, and may further include a coating apparatus, a drying apparatus, a winding apparatus, and the like. The battery production line provided in the third embodiment of the present application includes the liquid injection device 200 according to the first embodiment, so that the technical effects of any of the above embodiments are achieved, and will not be described herein.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
According to some embodiments of the present application, referring to fig. 1, 2 and 3, an electrolyte bubble removal device 100 is provided, wherein the electrolyte bubble removal device 100 includes a liquid storage tank 10, a liquid storage tank 13, an electrolyte delivery pipe, a seal tank 12, an exhaust pipe 14, a shut-off valve 15, a first liquid level detection device 21, a second liquid level detection device 22, a throttle valve 18 and a residual liquid tank 16. Specifically, the seal tank 12 is made of stainless steel, the electrolyte conveying pipe comprises a first pipeline 111 and a second pipeline 112, two ends of the first pipeline 111 are respectively communicated with the liquid storage tank 10 and the liquid storage tank 13, two ends of the second pipeline 112 are respectively communicated with the liquid storage tank 13 and the seal tank 12, after the liquid storage tank 10 performs primary degassing on the electrolyte, the electrolyte flows into the liquid storage tank 13 through the first pipeline 111, and the electrolyte in the liquid storage tank 13 can flow into the seal tank 12 through the second pipeline 112. Wherein, seal pot 12 is equipped with inlet, liquid outlet 122 and gas vent 121 respectively, and gas vent 121 sets up in seal pot 12's top, and liquid outlet 122 is close to seal pot 12's bottom setting, and second pipeline 112 passes through inlet and seal pot 12 intercommunication.
The exhaust pipe 14 includes a first section 141 and a second section 142 which are sequentially communicated, the first section 141 extends in a vertical direction and is communicated with the exhaust port 121, the second section 142 is communicated with the residual liquid tank 16, and the residual liquid tank 16 is used for receiving electrolyte flowing out of the exhaust pipe 14 in an exhaust process and recycling the discharged electrolyte. The stop valve 15, the first liquid level detection device 21 and the second liquid level detection device 22 are all arranged on the exhaust pipe 14 of the first section 141, the stop valve 15 is arranged near the top of the first section 141, the first liquid level detection device 21 and the second liquid level detection device 22 are both arranged between the stop valve 15 and the exhaust port 121, the first liquid level detection device 21 is arranged between the second liquid level detection device 22 and the exhaust port 121, the first liquid level detection device 21 is arranged near the exhaust port 121, and the second liquid level detection device 22 is arranged near the stop valve 15. The first liquid level detecting means 21 is for detecting data of a lower liquid level limit of the exhaust pipe 14 of the first section 141, and the second liquid level detecting means 22 is for detecting an upper liquid level limit of the exhaust pipe 14 of the first section 141. The electrolyte bubble removing device 100 further comprises a control device, the control device is respectively and electrically connected with the liquid level detecting device and the cut-off valve 15, the control device controls the cut-off valve 15 to be connected with the gas path of the exhaust pipe 14 according to the liquid level lower limit information so as to exhaust, and the control device controls the cut-off valve 15 to cut off the gas path of the exhaust pipe 14 according to the liquid level upper limit information so as to stop the exhaust action.
Wherein, the liquid storage tank 10 and the liquid storage tank 13 are higher than the exhaust port 121, so that a communicating vessel structure is formed among the liquid storage tank 13, the electrolyte conveying pipe and the sealing tank 12, therefore, based on the liquid level difference between the liquid storage tank 13 and the sealing tank 12, a pressure difference exists between the liquid level of the liquid storage tank 13 and the liquid level of the sealing tank 12, when the cut-off valve 15 is communicated with the exhaust pipe 14, the liquid level in the sealing tank 12 can move upwards under the driving force of the pressure difference, and bubbles stored at the top of the sealing tank 12 are discharged out of the sealing tank 12 and the exhaust pipe 14.
A throttle valve 18 is provided on the exhaust pipe 14 of the second segment 142, the throttle valve 18 being used to adjust the exhaust speed of the exhaust pipe 14.
The steps of bubble removal of the electrolyte bubble removal device 100 according to the present application are as follows:
the electrolyte flows to the liquid storage tank 13 after preliminary bubble removal by the liquid storage tank 10 in the liquid storage tank 1001, and flows to the sealing tank 12 by the electrolyte conveying pipeline 11. The overall height of the sealing tank 12 and the exhaust pipe 14 is lower than the bottom height of the liquid storage tank 13, so that the sealing tank 12, the exhaust pipe 14 and the liquid storage tank 13 are ensured to have a height difference directly.
The electrolyte collects in the sealed pot 12 the air which has re-evolved in the electrolyte feed line 11 into the exhaust pipe 14 of the first segment 141 at the top of the sealed pot 12. When the first liquid level detection device 21 senses that the exhaust pipe 14 of the first section 141 is filled with air, the pneumatic diaphragm valve (i.e. the stop valve 15) is automatically opened, the electrolyte in the seal tank 12 flows into the exhaust pipe 14 due to the influence of pressure difference, and when the liquid level is increased to the first liquid level detection device 21, the pneumatic diaphragm valve is automatically closed, and the air is discharged to the residual liquid tank 16 along the exhaust pipe 14 of the second section 142, so that the whole automatic exhaust flow is completed. The exhaust process may control the exhaust speed by adjusting the throttle valve 18.
Electrolyte in the sealed pot 12 is injected into the electrolyte injection cup 203 through the liquid injection pump 202 from the liquid outlet 122 at the bottom of the sealed pot 12, and then is injected into the battery through a subsequent electrolyte injection flow.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (18)
1. An electrolyte bubble removal apparatus, comprising:
A liquid storage tank;
an electrolyte delivery line;
the sealing tank is communicated with the liquid storage tank through the electrolyte conveying pipeline and is provided with a liquid outlet and an air outlet, the air outlet is positioned above the liquid outlet along the vertical direction, and the bottom of the liquid storage tank is higher than the air outlet;
and the exhaust pipe is communicated with the exhaust port and is provided with a cut-off valve, and the cut-off valve is used for switching on or cutting off a gas path of the exhaust pipe.
2. The electrolyte bubble removal apparatus of claim 1, further comprising a paddle disposed in the reservoir or a vacuum device in communication with the reservoir.
3. The electrolyte bubble removal apparatus as recited in claim 2, further comprising a liquid storage tank, wherein the liquid storage tank, the liquid storage tank and the seal tank are sequentially communicated, wherein the electrolyte delivery pipeline comprises a first pipeline and a second pipeline, two ends of the first pipeline are respectively communicated with the liquid storage tank and the liquid storage tank, and two ends of the second pipeline are respectively communicated with the liquid storage tank and the seal tank.
4. The electrolyte bubble removal apparatus as recited in claim 3, wherein the bottom of said reservoir tank is disposed higher than said exhaust port.
5. The electrolyte bubble removal apparatus of claim 1, further comprising a raffinate tank, wherein an end of the vent tube facing away from the vent port communicates with the raffinate tank.
6. The electrolyte bubble removal apparatus according to claim 1, wherein the number of the liquid outlets is plural, and the plural liquid outlets are sequentially arranged at intervals in the circumferential direction of the seal pot.
7. The electrolyte bubble removal apparatus of claim 6, wherein the liquid outlet is disposed proximate to a bottom of the seal pot, the liquid outlet being configured to output electrolyte.
8. The electrolyte bubble apparatus of claim 6, wherein each of the liquid outlets is provided with a liquid outlet pipe communicated with the liquid outlet, and one end of the liquid outlet pipe away from the liquid outlet pipe is inclined towards the lower side of the sealing tank.
9. The electrolyte bubble removal apparatus as claimed in claim 6, wherein the sealing tank is provided with a liquid inlet, the electrolyte delivery pipe is communicated with the sealing tank through the liquid inlet, the liquid inlet and the liquid outlet are arranged at intervals of a preset angle along the circumferential direction of the sealing tank, and the preset angle has a value ranging from 120 ° to 180 °.
10. The electrolyte bubble removal apparatus of claim 9, wherein,
a bottom wall of the seal pot is configured as a first protruding structure protruding toward an inside of the seal pot, and a side surface of the first protruding structure facing the inside of the seal pot is configured as a convex arc surface;
and/or the liquid inlet is higher than the liquid outlet.
11. The electrolyte bubble removal apparatus of claim 1, further comprising a throttle valve disposed in the exhaust pipe.
12. The electrolyte bubble removal apparatus of claim 1, wherein the top wall of the seal pot is configured as a second convex structure convex toward the outside of the seal pot, the second convex structure facing the inside side of the seal pot is configured as a concave arc surface, and the exhaust port is provided at an arc bottom position of the concave arc surface.
13. The electrolyte bubble removal apparatus of any one of claims 1-12, wherein the exhaust pipe comprises a first segment and a second segment in series communication, the first segment extending in a first direction and in communication with the exhaust port, the first direction being parallel to or at an angle of less than 90 ° to the vertical;
The electrolyte bubble removing device further comprises a liquid level detecting device, wherein the liquid level detecting device is arranged on the first section and located between the cut-off valve and the exhaust port, and the liquid level detecting device is used for detecting liquid level information of electrolyte in the first section.
14. The electrolyte bubble apparatus of claim 13, wherein the number of liquid level detection devices is two, the two liquid level detection devices include a first liquid level detection device and a second liquid level detection device disposed at intervals along the first direction in the first section, the first liquid level detection device is located between the gas outlet and the second liquid level detection device, and the liquid level information includes a lower liquid level limit measured by the first liquid level detection device and an upper liquid level limit measured by the second liquid level detection device.
15. The electrolyte bubble removal apparatus as recited in claim 13, further comprising a control device electrically connected to the liquid level detection device and the shut-off valve, respectively, the control device controlling the shut-off valve to switch on or off the gas path of the exhaust pipe based on the liquid level information.
16. A liquid injection device, characterized in that the liquid injection device comprises a liquid injection pipe and the electrolyte bubble removal device according to any one of claims 1 to 15, wherein the liquid injection pipe is communicated with a liquid outlet of a sealing tank in the electrolyte bubble removal device.
17. The fluid injection apparatus of claim 16, wherein the fluid injection apparatus further comprises:
the liquid injection pump is arranged on the liquid injection pipe;
and the liquid injection cup is communicated with the liquid injection pipe.
18. A battery production line comprising the liquid injection apparatus according to claim 16 or 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311126488.8A CN116864938A (en) | 2023-09-04 | 2023-09-04 | Electrolyte bubble removing device, electrolyte injecting equipment and battery production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311126488.8A CN116864938A (en) | 2023-09-04 | 2023-09-04 | Electrolyte bubble removing device, electrolyte injecting equipment and battery production line |
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