Electrolyte lithium salt concentration regulator for lithium ion battery preparation

Abstract

The utility model provides an electrolyte lithium salt concentration regulator for lithium ion battery preparation, which belongs to the technical field of lithium salt preparation and comprises a stirring disc, a connecting shaft, a plurality of stirring rods and a plurality of plugging sleeves. A plurality of mixing holes penetrating through the cavity are formed in the length direction of the stirring rod. The multiple plugging sleeves are arranged on the outer sides of the corresponding mixing holes in a sleeving mode, the top edges and the bottom edges of the plugging sleeves are fixed to the opposite side walls of the stirring rod respectively, a closed cavity is defined by the multiple plugging sleeves and the stirring rod, and the plugging sleeves are made of flexible materials; the plugging sleeves are used for plugging the corresponding mixing holes by means of deformation of gas flowing in from the gas inlet channels. And when the plurality of mixing holes in the two stirring rods are blocked, a closed stirring space is defined between the two stirring rods and the stirring disc. According to the electrolyte lithium salt concentration regulator for preparing the lithium ion battery, provided by the utility model, liquid with different concentrations can be prepared in one stirring disc, so that the applicability and the production efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium salt preparation, and more specifically relates to an electrolyte lithium salt concentration regulator for lithium ion battery preparation. Background Art

[0002] Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996. Their safety, specific capacity, self-discharge rate and performance-price ratio are better than lithium ion batteries. Lithium batteries are carriers of ion transmission in batteries and are generally composed of lithium salts and organic solvents. In the preparation process of the electrolyte, an appropriate amount of organic solvent needs to be added to adjust the lithium salt concentration inside the electrolyte.

[0003] At present, there are still some defects and shortcomings in the use of lithium-ion battery preparation equipment. The existing lithium-ion battery concentration regulator can only prepare liquid of one concentration at a time, but the reality is that batteries of different specifications and parameters require different lithium salt concentrations. This requires manufacturers to purchase multiple concentration regulators or adjust the concentration in sequence, which greatly affects production efficiency and cost. Utility Model Content

[0004] The utility model aims to provide an electrolyte lithium salt concentration regulator for preparing lithium ion batteries, aiming to solve the problem that only one concentration of liquid can be prepared at a time, which affects production efficiency and cost.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an electrolyte lithium salt concentration regulator for lithium ion battery preparation, comprising:

[0006] A stirring plate, wherein a stirring chamber is provided in the stirring plate; a feeding port and a discharging port communicating with the stirring chamber are respectively provided at the top and the bottom of the stirring plate;

[0007] A connecting shaft is installed in the stirring disk; a plurality of air inlet channels are arranged in the connecting shaft;

[0008] A plurality of stirring rods are fixed at intervals along the circumference of the connecting shaft; a cavity connected to the corresponding air inlet channel is provided in the stirring rod; and a plurality of mixing holes penetrating the cavity are provided along the length direction of the stirring rod;

[0009] A plurality of plugging sleeves are sleeved on the outer sides of the corresponding mixing holes, and the top edge and the bottom edge of the plugging sleeves are respectively fixed on the side walls opposite to the stirring rod. The plurality of plugging sleeves and the stirring rods enclose the closed cavity, and the plugging sleeves are made of flexible material. The plugging sleeves are deformed by the gas flowing in from the air inlet channel to plug the corresponding mixing holes.

[0010] When the plurality of mixing holes on the two stirring rods are blocked, a closed stirring space is enclosed between the two stirring rods and the stirring disk.

[0011] In a possible implementation, a plurality of air outlet holes for mixing materials are provided on the inner wall of the stirring disk.

[0012] In a possible implementation, the plurality of air outlet holes are distributed on both sides of the discharge port.

[0013] In a possible implementation, a one-way flow limiting member is provided in the air outlet.

[0014] In a possible implementation, a sealing strip is provided on the outer edge of the stirring rod, and the sealing strip is used to seal the gap between the stirring rod and the inner wall of the stirring plate.

[0015] In a possible implementation, the sealing strip is made of a flexible material, and the sealing strip, the sealing sleeve and the stirring rod surround the cavity; the sealing strip deforms itself by means of changes in air pressure in the cavity to generate or seal the gap between the stirring rod and the stirring plate.

[0016] In a possible implementation, a barrier net for limiting deformation of the blocking sleeve is provided on the outer side of the stirring rod.

[0017] In a possible implementation, a gas outlet is provided on the top of the stirring plate, and the gas outlet is connected to a purification tank.

[0018] In a possible implementation, the stirring disk is arranged vertically.

[0019] In a possible implementation manner, the stirring rod is welded and fixed on the connecting shaft.

[0020] The beneficial effect of the lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries provided by the utility model is that: compared with the prior art, the lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries provided by the utility model has a stirring chamber in the stirring disk, and the feed port and the discharge port are respectively arranged at the top and the bottom of the stirring disk and are both connected to the stirring chamber. The connecting shaft is installed in the stirring disk; the stirring rod is provided with a cavity connected to the corresponding air inlet channel; and a plurality of mixing holes penetrating the cavity are provided along the length direction of the stirring rod. The plugging sleeve is arranged on the outside of the corresponding mixing hole, and the top edge and the bottom edge of the plugging sleeve are respectively fixed on the opposite side walls of the stirring rod.

[0021] In actual application, the cavity is sealed by multiple sealing sleeves. When the gas in the air inlet channel enters the cavity, the sealing sleeve is deformed and eventually blocks the mixing hole because it is made of flexible material. There are multiple mixing holes on the stirring rod. When multiple mixing holes on two stirring rods are blocked, a closed stirring space is enclosed between the two stirring rods and the stirring disk. Through the above arrangement, not only the lithium salt concentration of the electrolyte can be adjusted, but more importantly, liquids of different concentrations can be prepared in one stirring disk, which improves applicability and production efficiency and saves volume and the cost of purchasing the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a lithium salt concentration regulator for an electrolyte for preparing a lithium-ion battery provided by an embodiment of the utility model;

[0024] Figure 2 This is a connection diagram of the plugging sleeve provided in the first embodiment of the utility model when the mixing hole is not plugged;

[0025] Figure 3 This is a connection diagram of the plugging sleeve provided in the second embodiment of the utility model when plugging the mixing hole.

[0026] In the figure: 1. stirring plate; 2. feed port; 3. purification tank; 4. stirring rod; 5. sealing strip; 6. connecting shaft; 7. sealing cover; 8. one-way flow limiting part; 9. barrier net; 10. sealing sleeve; 11. cavity. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please also read Figures 1 to 3, the lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries provided by the utility model is now described. The lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries comprises: a stirring disk 1, a connecting shaft 6, a plurality of stirring rods 4 and a plurality of sealing sleeves 10. A stirring chamber is provided in the stirring disk 1; a feed port 2 and a discharge port connected to the stirring chamber are respectively provided at the top and the bottom of the stirring disk 1. The connecting shaft 6 is installed in the stirring disk 1; a plurality of air inlet channels are provided in the connecting shaft 6. A plurality of stirring rods 4 are fixed at intervals along the circumference of the connecting shaft 6; a cavity 11 connected to the corresponding air inlet channel is provided in the stirring rod 4; a plurality of mixing holes penetrating the cavity 11 are provided along the length direction of the stirring rod 4. A plurality of plugging sleeves 10 are sleeved on the outside of the corresponding mixing holes, and the top and bottom edges of the plugging sleeves 10 are respectively fixed on the opposite side walls of the stirring rod 4. The plurality of plugging sleeves 10 and the stirring rod 4 are enclosed to form a closed cavity 11. The plugging sleeves 10 are made of flexible materials. The plugging sleeves 10 are deformed by the gas flowing in from the air inlet channel to plug the corresponding mixing holes. When the plurality of mixing holes on the two stirring rods 4 are blocked, a closed stirring space is enclosed between the two stirring rods 4 and the stirring disk 1.

[0029] The beneficial effect of the lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries provided by the utility model is that: compared with the prior art, the lithium salt concentration regulator of the electrolyte for preparing lithium-ion batteries provided by the utility model has a stirring chamber in the stirring disk 1, and the feed port 2 and the discharge port are respectively arranged at the top and the bottom of the stirring disk 1 and are both connected to the stirring chamber. The connecting shaft 6 is installed in the stirring disk 1; the stirring rod 4 is provided with a cavity 11 connected to the corresponding air inlet channel; and a plurality of mixing holes penetrating the cavity 11 are provided along the length direction of the stirring rod 4. The plugging sleeve 10 is sleeved on the outside of the corresponding mixing hole, and the top edge and the bottom edge of the plugging sleeve 10 are respectively fixed on the opposite side walls of the stirring rod 4.

[0030] In actual application, the cavity 11 is sealed by a plurality of sealing sleeves 10. When the gas in the air inlet channel enters the cavity 11, the sealing sleeve 10 is deformed and eventually blocks the mixing hole because the sealing sleeve 10 is made of flexible material. There are multiple mixing holes on the stirring rod 4. When the multiple mixing holes on the two stirring rods 4 are blocked, a closed stirring space is enclosed between the two stirring rods 4 and the stirring disk 1. Through the above arrangement, not only the lithium salt concentration of the electrolyte can be adjusted, but more importantly, liquids of different concentrations can be prepared in one stirring disk 1, which improves applicability and production efficiency and saves volume and the cost of purchasing the device.

[0031] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1A plurality of vent holes for mixing materials are provided on the inner wall of the stirring plate 1. When the mixing holes on the corresponding stirring rods 4 are blocked, a closed space is formed between the two corresponding stirring rods 4 and the inner wall of the stirring plate 1. More importantly, the position of this space is always changing.

[0032] In order to further improve the mixing effect of lithium salt and avoid a series of problems such as material precipitation, a plurality of air outlets are provided on the inner wall of the stirring disk 1. The air outlets can inject inert gas into the formed space to enhance the mixing effect through the inert gas.

[0033] Usually, the air outlet is used to discharge gas in the early stage of stirring to improve the mixing effect. When the mixing reaches a certain degree, the air outlet is closed.

[0034] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 , multiple air outlets are distributed on both sides of the discharge port. In order to improve the mixing effect of different materials, the number of air outlets is large and they are arranged at intervals along the circumference of the stirring disk 1. Since the space may be in a closed state at this time, it is necessary to open the air outlets at the corresponding positions at the appropriate time, and the feed port 2 on the stirring disk 1 can be used as a channel for gas discharge. Another implementation method is that the gas can be discharged from some of the air outlets.

[0035] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 A one-way flow restrictor 8 is provided in the air outlet. The gas discharged from the air outlet is used for mixing different materials, and the air outlet is usually located below the central axis of the stirring disk 1. If there is no cooperation with other structures and components, the liquid in the stirring chamber is easy to flow back into the air outlet, causing a series of problems. For this reason, a one-way flow restrictor 8 is installed in the air outlet. The one-way flow restrictor 8 can be a one-way valve. The function of the one-way flow restrictor 8 is to allow the gas to be discharged only from the air outlet, and the external gas and liquid cannot flow into the air outlet through the one-way flow restrictor 8.

[0036] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 , Figure 2 and Figure 3 The outer edge of the stirring rod 4 is provided with a sealing strip 5, which is used to seal the gap between the stirring rod 4 and the inner wall of the stirring disk 1. Due to manufacturing and installation errors, there is inevitably a gap between the stirring rod 4 and the inner wall of the stirring disk 1, and this gap makes it impossible to ensure the airtightness of the space even if the mixing hole on the corresponding stirring rod 4 is sealed, because the liquid may flow out through the gap between the stirring rod 4 and the stirring disk 1.

[0037] In order to improve the airtightness, a sealing strip 5 is provided between the stirring rod 4 and the stirring disk 1. The sealing strip 5 moves with the stirring rod 4, and the sealing strip 5 and the stirring disk 1 always keep in contact with each other, thereby ensuring the airtightness.

[0038] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 , Figure 2 and Figure 3 , the sealing strip 5 is made of flexible material, and the sealing strip 5, the blocking sleeve 10 and the stirring rod 4 are surrounded by a cavity 11; the sealing strip 5 is deformed by the change of air pressure in the cavity 11 to generate or block the gap between the stirring rod 4 and the stirring disk 1. The sealing strip 5 can effectively block the airtightness between the stirring rod 4 and the stirring disk 1, but due to the long length of the sealing strip 5 and the certain friction between the sealing strip 5 and the stirring disk 1, the resistance of the stirring rod 4 to run is large, and the energy waste is serious. For this reason, in the early stage of stirring, the gas in the cavity 11 can be extracted to make the sealing strip 5 shrink and deform toward the inside of the stirring rod 4. After the sealing strip 5 is deformed, the force between the sealing strip 5 and the stirring disk 1 is reduced or even disappears. When different concentrations are required, gas is introduced into the cavity 11 again, so that the sealing strip 5 separates the stirring chamber. At this time, after the stirring rod 4 rotates a certain angle at the right time, the corresponding amount of material can be added through the feed port 2 to achieve the preparation of materials of different concentrations in one stirring disk 1. A blocking cover 7 is hinged at the bottom of the stirring disc 1 , and the blocking cover 7 is used to block the discharge port.

[0039] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 , Figure 2 and Figure 3 , a barrier net 9 for limiting the deformation of the sealing sleeve 10 is provided on the outer side of the stirring rod 4. First, the interior of the stirring rod 4 is in a hollow state, and the top and bottom edges of the sealing sleeve 10 are respectively fixed on the two opposite inner walls of the stirring rod 4, and it can be approximately understood that the sealing sleeve 10 is coaxially arranged with the mixing hole. When the gas is introduced into the cavity 11, the sealing sleeve 10 will deform toward the central axis of the mixing hole. In order to avoid too much gas injected into the cavity 11 or due to some other reasons, resulting in irregular deformation of the sealing sleeve 10, the most serious result is that the sealing sleeve 10 is severely deformed and the mixing hole cannot be effectively blocked. In order to avoid the above problems, a barrier net 9 is fixed on the stirring rod 4, and the two barrier nets 9 are arranged relative to each other, that is, the sealing sleeve 10 can only deform within the range between the two barrier nets 9, that is, the maximum deformation range of the barrier net 9 is limited.

[0040] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1The top of the stirring disk 1 is provided with an air outlet, which is connected to a purification tank 3. The gas discharged from the air outlet into the stirring disk 1 needs to be discharged in time, so an air outlet is provided on the top of the stirring disk 1, and the air outlet can discharge the gas in the stirring chamber. In order to achieve resource recycling and avoid damage to the environment, a filler for adsorbing substances in the gas is provided in the purification tank 3, and the gas discharged from the stirring disk 1 will enter the purification tank 3 and then be discharged.

[0041] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 , the stirring disk 1 is arranged vertically. Driven by the connecting shaft 6, the multiple stirring rods 4 rotate in the stirring chamber. At the beginning, the multiple mixing holes on the stirring rods 4 are all in an open state. It is precisely because of the existence of the mixing holes that the electrolyte and the organic solvent can be better mixed. After mixing to a certain extent, it is necessary to inject gas into the cavity 11 through the air inlet channel to separate the stirring chamber, and after separation, mixing can still be achieved by the flow of liquid and the like. At this time, it is necessary to add the corresponding volume of organic solvent and electrolyte according to the actual use requirements, so as to complete the preparation of lithium salts with different concentrations.

[0042] Normally, there are four stirring rods 4. When the mixing holes on two stirring rods 4 in the same straight line are blocked, the stirring chamber is divided into two, while the mixing holes on the remaining stirring rods 4 are open, so that the liquid can continue to be mixed during the rotation.

[0043] In some embodiments of the lithium salt concentration regulator for preparing lithium ion batteries provided in this application, please refer to Figure 1 The stirring rod 4 is welded and fixed on the connecting shaft 6. By welding and fixing, the structural strength between the stirring rod 4 and the connecting shaft 6 can be ensured, and the risks of cracks or even breakage between the two can be avoided.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrolyte lithium salt concentration regulator for lithium ion battery preparation, characterized in that: include: A stirring plate, wherein a stirring chamber is provided in the stirring plate; The top and bottom of the stirring plate are respectively provided with a feed inlet and a discharge outlet connected to the stirring chamber; A connecting shaft is installed in the stirring disk; a plurality of air inlet channels are arranged in the connecting shaft; A plurality of stirring rods are fixed at intervals along the circumference of the connecting shaft; a cavity connected to the corresponding air inlet channel is provided in the stirring rod; and a plurality of mixing holes penetrating the cavity are provided along the length direction of the stirring rod; A plurality of plugging sleeves are sleeved on the outer sides of the corresponding mixing holes, and the top edge and the bottom edge of the plugging sleeves are respectively fixed on the side walls opposite to the stirring rod. The plurality of plugging sleeves and the stirring rods enclose the closed cavity, and the plugging sleeves are made of flexible material. The plugging sleeves are deformed by the gas flowing in from the air inlet channel to plug the corresponding mixing holes. When the plurality of mixing holes on the two stirring rods are blocked, a closed stirring space is enclosed between the two stirring rods and the stirring disk.

2. The lithium salt concentration regulator for electrolyte for preparing lithium ion batteries according to claim 1, characterized in that: The inner wall of the stirring plate is provided with a plurality of air outlet holes for mixing materials.

3. The lithium salt concentration regulator for electrolyte used in the preparation of lithium ion batteries according to claim 2, characterized in that: The plurality of air outlets are distributed on both sides of the discharge port.

4. The lithium salt concentration regulator for electrolyte for preparing lithium ion batteries according to claim 3, characterized in that: A one-way flow limiting component is arranged in the air outlet.

5. The lithium salt concentration regulator for electrolyte used in the preparation of lithium ion batteries according to claim 1, characterized in that: A sealing strip is provided on the outer edge of the stirring rod, and the sealing strip is used to seal the gap between the stirring rod and the inner wall of the stirring plate.

6. The lithium salt concentration regulator for electrolyte for preparing lithium ion batteries according to claim 5, characterized in that: The sealing strip is made of a flexible material, and the sealing strip, the sealing sleeve and the stirring rod surround the cavity; the sealing strip deforms itself by means of changes in air pressure in the cavity to generate or seal the gap between the stirring rod and the stirring disk.

7. The lithium salt concentration regulator for electrolyte used in the preparation of lithium ion batteries according to claim 1, characterized in that: The outer side surface of the stirring rod is provided with a barrier net for limiting the deformation of the sealing sleeve.

8. The lithium salt concentration regulator for electrolyte used in the preparation of lithium ion batteries according to claim 1, characterized in that: An air outlet is arranged on the top of the stirring plate, and the air outlet is connected with a purification tank.

9. The lithium salt concentration regulator for electrolyte for preparing lithium ion batteries according to claim 1, characterized in that: The stirring disc is arranged vertically.

10. The lithium salt concentration regulator for electrolyte used in the preparation of lithium ion batteries according to claim 1, characterized in that: The stirring rod is welded and fixed on the connecting shaft.

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