Bubble removing device for electrolyte

Abstract

The utility model relates to an electrolyte bubble removing device. The electrolyte bubble removing device comprises an electrolyte barrel, a stirring barrel, a standing barrel, a stirring mechanism, a first liquid conveying pipe and a second liquid conveying pipe, the first liquid conveying pipe is communicated with the electrolyte barrel and the stirring barrel, and the second liquid conveying pipe is communicated with the bottom end of the stirring barrel and the standing barrel; the stirring barrel is provided with a first vacuum detector, and the first vacuum detector is used for detecting the vacuum degree in the stirring barrel; a vacuumizing opening is formed in the top end of the stirring barrel; the stirring mechanism comprises a driving motor, a stirring shaft and a stirring paddle, the driving motor is installed on the stirring barrel, the stirring shaft extends into the stirring barrel, the driving motor is in transmission connection with the stirring shaft, the stirring paddle is located in the stirring barrel, the stirring paddle is in transmission connection with the stirring shaft, and the stirring paddle is located in the stirring barrel. A plurality of through holes are formed in the surface of the stirring paddle. According to the scheme provided by the invention, the content of bubbles in the electrolyte can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of battery processing technology, and in particular to an electrolyte degassing device. Background Technology

[0002] Soft-pack batteries are the third generation of lithium batteries developed based on the original steel-cased, aluminum-cased, and plastic-cased batteries. Soft-pack batteries have advantages such as being lighter, thinner, having better safety performance, higher energy density, more stable discharge platform, better power performance, and being environmentally friendly and pollution-free. As a result, soft-pack battery products are widely used in many fields such as electric vehicles, power banks, digital electronic products, smart wearable products, and electric toys.

[0003] In related technologies, during the manufacturing process of pouch batteries, the amount of electrolyte injected into the cells often cannot be effectively controlled. In particular, residual air bubbles often occur, resulting in insufficient precision in the amount of electrolyte injected into the cells and causing under-filling. The error in the amount of electrolyte injected into the cells affects the yield rate of pouch batteries and has a significant impact on the improvement of the energy density of pouch batteries, thus failing to effectively reduce the size of pouch batteries and provide energy density. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an electrolyte degassing device that can effectively reduce the bubble content in the electrolyte.

[0005] The first aspect of this application provides an electrolyte degassing device, which includes an electrolyte tank, a stirring tank, a settling tank, a stirring mechanism, a first infusion pipe, and a second infusion pipe. The first infusion pipe is connected to both the electrolyte tank and the stirring tank, and the second infusion pipe is connected to both the bottom of the stirring tank and the settling tank. The stirring tank is equipped with a first vacuum detector for detecting the vacuum level inside the stirring tank. A vacuum port is provided at the top of the stirring tank. The stirring mechanism includes a drive motor, a stirring shaft, and a stirring paddle. The drive motor is mounted in the stirring tank, the stirring shaft extends into the stirring tank, and the drive motor is drive-connected to the stirring shaft. The stirring paddle is located inside the stirring tank and is drive-connected to the stirring shaft. Multiple through holes are provided on the surface of the stirring paddle.

[0006] Furthermore, the stirring paddle includes a turntable and a plurality of stirring blades. The turntable is connected to one end of the stirring shaft, the stirring blades are connected to the turntable, the stirring blades are distributed at intervals along the circumference of the turntable, and the through holes are located on the stirring blades.

[0007] Furthermore, the stirring blade includes a base plate and a pair of arc-shaped plates. The base plate is connected to the turntable, and the arc-shaped plates are connected to the end of the base plate away from the turntable. The two arc-shaped plates are spaced apart, and the through hole is located on the arc-shaped plates.

[0008] Furthermore, a first liquid level detection tube is provided on the side of the mixing tank, which is used to detect the liquid level height inside the mixing tank.

[0009] Furthermore, the mixing tank is equipped with a first upper liquid level alarm and a first lower liquid level alarm, with the first upper liquid level alarm positioned above the first lower liquid level alarm; when the liquid level in the mixing tank is higher than the first upper liquid level alarm, the first upper liquid level alarm will sound an alarm; when the liquid level in the mixing tank is lower than the first lower liquid level alarm, the first lower liquid level alarm will sound an alarm.

[0010] Furthermore, the settling tank is equipped with a liquid sensor, which is used to detect the moisture content of the liquid in the settling tank.

[0011] Furthermore, the electrolyte degassing device also includes a waste container and a waste pipe, wherein the waste pipe is connected to the bottom end of the settling container and the waste container, respectively.

[0012] Furthermore, the settling container is equipped with a second vacuum detector, which is used to detect the vacuum level inside the settling container.

[0013] Furthermore, a second liquid level detection tube is provided on the side of the settling tank, which is used to detect the liquid level height inside the settling tank.

[0014] Furthermore, the settling tank is equipped with a second upper liquid level alarm and a second lower liquid level alarm, with the second upper liquid level alarm positioned above the second lower liquid level alarm; when the liquid level in the settling tank is higher than the second upper liquid level alarm, the second upper liquid level alarm will sound an alarm; when the liquid level in the settling tank is lower than the second lower liquid level alarm, the second lower liquid level alarm will sound an alarm.

[0015] The technical solution provided in this application can include the following beneficial effects: by opening multiple through holes on the surface of the stirring paddle, the electrolyte in the stirring tank is stirred by the stirring paddle, so that the electrolyte can be stirred more evenly, and the air bubbles in the electrolyte are removed faster. The air bubbles are discharged by the vacuum port at the top of the stirring tank, thereby effectively solving the problem of excessive air bubbles in the electrolyte. Combined with the detection of the vacuum degree in the stirring tank by the first vacuum detector, gas is prevented from flowing back into the stirring tank, thereby ensuring that the quality of the electrolyte flowing into the settling tank meets the standard, improving the accuracy of electrolyte injection, improving the reliability of soft-pack battery performance, and improving the energy density of the cell.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0018] Figure 1 This is a schematic diagram of the structure of the electrolyte degassing device shown in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the stirring paddle shown in the embodiment of this application.

[0020] Reference numerals: Electrolyte tank 1; Third vacuum detector 11; Stirring tank 2; First vacuum detector 21; Vacuum extraction port 22; First liquid level detection tube 23; First upper liquid level alarm 24; First lower liquid level alarm 25; Settling tank 3; Liquid sensor 31; Second vacuum detector 32; Second upper liquid level alarm 33; Second lower liquid level alarm 34; Second liquid level detection tube 35; Stirring mechanism 4; Drive motor 41; Stirring shaft 42; Stirring paddle 43; Through hole 431; Turntable 432; Stirring blade 433; Base plate 434; Arc plate 435; First delivery pipe 5; Second delivery pipe 6; Waste tank 7; Waste pipe 8. Detailed Implementation

[0021] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0022] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In related technologies, during the manufacturing process of pouch batteries, the electrolyte injection volume of the cells often cannot be effectively controlled. One common issue is the presence of residual air bubbles, leading to insufficient electrolyte injection accuracy and under-filling. This error in electrolyte injection volume affects the yield rate of pouch batteries and significantly impacts their energy density, hindering the reduction of pouch battery size and the improvement of energy density. To address these issues, this application provides an electrolyte degassing device that effectively reduces the air bubble content in the electrolyte.

[0026] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of the electrolyte degassing device shown in the embodiments of this application.

[0028] See Figure 1The electrolyte degassing device includes an electrolyte tank 1, a stirring tank 2, a settling tank 3, a stirring mechanism 4, a first delivery pipe 5, and a second delivery pipe 6. The electrolyte tank 1 stores the electrolyte before degassing. The electrolyte tank 1 is equipped with a third vacuum detector 11, which detects the vacuum level inside the electrolyte tank 1. The first delivery pipe 5 is connected to both the electrolyte tank 1 and the stirring tank 2, allowing the electrolyte tank 1 to supply the electrolyte before degassing to the stirring tank 2 via the first delivery pipe 5. The stirring tank 2 can stir the electrolyte. The second infusion pipe 6 is connected to the bottom of the stirring tank 2 and the settling tank 3. The stirring tank 2 can deliver the stirred electrolyte to the settling tank 3 through the second infusion pipe 6. Since the bottom of the stirring tank 2 is connected to the second infusion pipe 6, when the electrolyte is stirred in the stirring tank 2, bubbles in the electrolyte rise, and some bubbles may float on the surface of the electrolyte. Delivering electrolyte from the bottom of the stirring tank 2 to the settling tank 3 through the second infusion pipe 6 avoids these bubbles from being transported to the settling tank 3. The settling tank 3 can be connected to an external injection needle via a pipe to inject electrolyte into the pouch battery.

[0029] The mixing tank 2 is equipped with a first vacuum detector 21, which is used to detect the vacuum level inside the mixing tank 2. Operators can check the air pressure inside the mixing tank 2 through the first vacuum detector 21, facilitating monitoring of the air pressure situation. The pressure inside the mixing tank 2 must be controlled above 0.2 MPa to prevent water vapor from being drawn in due to negative pressure, which would affect the quality of the electrolyte. A vacuum port 22 is located at the top of the mixing tank 2. This port can be connected to an external suction pipe and a vacuum pump to remove gas from the mixing tank 2, accelerating the removal of air bubbles from the electrolyte.

[0030] Figure 2 This is a schematic diagram of the structure of the stirring paddle shown in the embodiment of this application.

[0031] See Figure 1 and Figure 2 The stirring mechanism 4 includes a drive motor 41, a stirring shaft 42, and a stirring paddle 43. The drive motor 41 is mounted on the stirring tank 2, and the stirring shaft 42 extends into the stirring tank 2. The drive motor 41 is connected to the stirring shaft 42, and can drive the stirring shaft 42 to rotate. The stirring paddle 43 is located inside the stirring tank 2 and is connected to the stirring shaft 42. The stirring shaft 42 extends vertically, and the stirring paddle 43 rotates with the stirring shaft 42, thus stirring the electrolyte in the stirring tank 2. The surface of the stirring paddle 43 has multiple through holes 431. When the stirring paddle 43 stirs in the stirring tank 2, the electrolyte can flow through the through holes 431, allowing the electrolyte to be stirred more thoroughly.

[0032] This application utilizes multiple through holes 431 on the surface of the stirring paddle 43 to stir the electrolyte in the stirring tank 2, making the electrolyte more uniform and accelerating the removal of air bubbles. The vacuum port 22 at the top of the stirring tank 2 is used to expel air bubbles, thereby effectively solving the problem of excessive air bubbles in the electrolyte. Combined with the first vacuum detector 21 to detect the vacuum level in the stirring tank 2, gas backflow into the stirring tank 2 is prevented, thus ensuring that the quality of the electrolyte flowing into the settling tank 3 meets the standards, improving the accuracy of electrolyte injection, enhancing the reliability of soft-pack battery performance, and increasing the energy density of the battery cell.

[0033] See Figure 1 and Figure 2 The stirring paddle 43 includes a turntable 432 and multiple stirring blades 433. The turntable 432 is connected to one end of the stirring shaft 42, and the stirring blades 433 are connected to the turntable 432. The stirring blades 433 are distributed at intervals along the circumference of the turntable 432, and through holes 431 are located in the stirring blades 433. When the stirring paddle 43 rotates, the through holes 431 move along the circumference of the stirring shaft 42, and the electrolyte can pass through the stirring blades 433 along the through holes 431. Preferably, there are six stirring blades 433, which are evenly distributed at intervals along the circumference of the turntable 432, and the stirring blades 433 are plate-shaped. The plate surface of the stirring blades 433 is perpendicular to the plate surface of the turntable 432, so that the contact area between the stirring blades 433 and the electrolyte is larger when the stirring blades 433 rotate, and the electrolyte can be stirred more evenly by the stirring blades 433.

[0034] In some embodiments, the stirring blade 433 includes a base plate 434 and a pair of arc-shaped plates 435. The base plate 434 is connected to the turntable 432 and extends radially along the stirring shaft 42. The arc-shaped plates 435 are connected to the end of the base plate 434 away from the turntable 432 and are curved circumferentially from the base plate 434 toward the stirring shaft 42. The two arc-shaped plates 435 are spaced apart, and through holes 431 are located on the arc-shaped plates 435. Preferably, the two arc-shaped plates 435 are arranged side by side and parallel. When the electrolyte passes through the through hole 431 on one of the arc-shaped plates 435, it reaches the space between the two arc-shaped plates 435 and then passes through the through hole 431 on the other arc-shaped plate 435. By setting two parallel arc-shaped plates 435, the stirring effect of the stirring blade 433 on the electrolyte can be further improved, thereby reducing residual bubbles in the electrolyte.

[0035] See Figure 1 The side of the mixing tank 2 is provided with a first liquid level detection tube 23, which is used to detect the liquid level in the mixing tank 2. Preferably, the first liquid level detection tube 23 is a glass tube that extends vertically, and the operator can directly see the liquid level in the mixing tank 2 through the first liquid level detection tube 23.

[0036] The mixing tank 2 is equipped with a first upper liquid level alarm 24 and a first lower liquid level alarm 25, with the first upper liquid level alarm 24 located above the first lower liquid level alarm 25. When the liquid level in the mixing tank 2 is higher than the first upper liquid level alarm 24, the first upper liquid level alarm 24 will sound an alarm; when the liquid level in the mixing tank 2 is lower than the first lower liquid level alarm 25, the first lower liquid level alarm 25 will sound an alarm. By setting the first upper liquid level alarm 24 and the first lower liquid level alarm 25, the liquid level in the mixing tank 2 is monitored to avoid the liquid level in the mixing tank 2 being too high or too low, which would affect the normal operation of the mixing tank 2. Preferably, the first upper liquid level alarm 24 is located at the top of the first liquid level detection tube 23, and the first lower liquid level alarm 25 is located at the bottom of the first liquid level detection tube 23.

[0037] The settling tank 3 is equipped with a liquid sensor 31, which is used to detect the moisture content of the liquid in the settling tank 3. The liquid sensor 31 is connected to an alarm. When the liquid sensor 31 detects that the moisture content exceeds the standard, the alarm will sound an alarm signal to prevent the electrolyte in the produced soft-pack batteries from being of substandard quality. The electrolyte degassing device also includes a waste tank 7 and a waste pipe 8. The waste pipe 8 is connected to the bottom of the settling tank 3 and the waste tank 7, respectively. When the liquid sensor 31 detects that the moisture content of the electrolyte in the settling tank 3 exceeds the standard, the water valve on the waste pipe 8 opens, and the substandard electrolyte in the settling tank 3 flows into the waste tank 7 through the waste pipe 8 for temporary storage.

[0038] The settling tank 3 is equipped with a second vacuum detector 32, which is used to detect the vacuum level inside the settling tank 3. The staff can check the air pressure inside the settling tank 3 through the second vacuum detector 32, which makes it convenient for the staff to monitor the air pressure inside the settling tank 3. The second vacuum detector 32 also has an alarm function. When the pressure in the settling tank 3 needs to be controlled below -20 kPa, the second vacuum detector 32 will issue an alarm to prevent unqualified electrolyte from being injected into the soft pack battery through the injection needle.

[0039] A second liquid level detection tube 35 is provided on the side of the settling tank 3. The second liquid level detection tube 35 is used to detect the liquid level in the settling tank 3. Preferably, the second liquid level detection tube 35 is a glass tube and extends vertically. The staff can directly see the liquid level in the settling tank 3 through the second liquid level detection tube 35.

[0040] The settling tank 3 is equipped with a second upper liquid level alarm 33 and a second lower liquid level alarm 34, with the second upper liquid level alarm 33 positioned above the second lower liquid level alarm 34. When the liquid level in the settling tank 3 is higher than the second upper liquid level alarm 33, the second upper liquid level alarm 33 will sound an alarm; when the liquid level in the settling tank 3 is lower than the second lower liquid level alarm 34, the second lower liquid level alarm 34 will sound an alarm. The liquid level in the settling tank 3 is monitored by setting the second upper liquid level alarm 33 and the second lower liquid level alarm 34. Preferably, the second upper liquid level alarm 33 is located at the top of the second liquid level detection tube 35, and the second lower liquid level alarm 34 is located at the bottom of the second liquid level detection tube 35.

[0041] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0042] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electrolyte bubble removing device characterized by comprising: The utility model provides an electrolyte tank, a stirring tank, a standing tank, a stirring mechanism, a first liquid pipe and a second liquid pipe, the first liquid pipe is linked with electrolyte tank and stirring tank respectively, the second liquid pipe is linked with the bottom of stirring tank and standing tank respectively, the stirring tank is equipped with the first vacuum detector, and the first vacuum detector is used for detecting the vacuum degree in stirring tank, the top of stirring tank is equipped with the vacuum extraction mouth, the stirring mechanism includes drive motor, stirring shaft and stirring paddle, drive motor is installed in stirring tank, stirring shaft extends in stirring tank, drive motor and stirring shaft transmission connection, and the surface of stirring paddle is equipped with a plurality of through -hole.

2. The electrolyte bubble removal device of claim 1, wherein: The stirring paddle includes a rotating disc and a plurality of stirring blades, the rotating disc is connected with one end of the stirring shaft, the stirring blades are connected with the rotating disc, the stirring blades are distributed along the circumferential direction of the rotating disc, and the through holes are located in the stirring blades.

3. The electrolyte deaerator of claim 2, wherein: The stirring blade includes a base plate and a pair of arc-shaped plates, the base plate is connected with the rotating disc, the arc-shaped plates are connected with the ends of the base plate away from the rotating disc, the two arc-shaped plates are arranged at intervals, and the through holes are located in the arc-shaped plates.

4. The electrolyte bubble removal device of claim 1, wherein: The side of the stirring tank is provided with a first liquid level detection tube, and the first liquid level detection tube is used for detecting the liquid level in the stirring tank.

5. The electrolyte deaerator of claim 4, wherein: The stirring tank is provided with a first upper liquid level alarm and a first lower liquid level alarm, the first upper liquid level alarm is located above the first lower liquid level alarm, when the liquid level of the stirring tank is higher than the first upper liquid level alarm, the first upper liquid level alarm alarms, and when the liquid level of the stirring tank is lower than the first lower liquid level alarm, the first lower liquid level alarm alarms.

6. The electrolyte deaerator of claim 1, wherein: The standing tank is provided with a liquid sensor, and the liquid sensor is used for detecting the moisture content of the liquid in the standing tank.

7. The electrolyte deaerator of claim 6, wherein: It also includes a scrap tank and a scrap pipe, and the scrap pipe is connected with the bottom of the standing tank and the scrap tank respectively.

8. The electrolyte deaerator of claim 1, wherein: The standing tank is provided with a second vacuum detector, and the second vacuum detector is used for detecting the vacuum degree in the standing tank.

9. The electrolyte deaerator of claim 1, wherein: The side of the standing tank is provided with a second liquid level detection tube, and the second liquid level detection tube is used for detecting the liquid level in the standing tank.

10. The electrolyte deaeration device of claim 9, wherein: The standing tank is provided with a second upper liquid level alarm and a second lower liquid level alarm, the second upper liquid level alarm is located above the second lower liquid level alarm, when the liquid level of the standing tank is higher than the second upper liquid level alarm, the second upper liquid level alarm alarms, and when the liquid level of the standing tank is lower than the second lower liquid level alarm, the second lower liquid level alarm alarms.

Images