A lithium ion battery electrolyte quantitative dropping device

Abstract

The utility model provides a kind of lithium ion battery electrolyte quantitative dropping device, it is related to battery manufacturing technical field, including liquid storage cylinder: push rod is slidably arranged in liquid storage cylinder, liquid outlet is equipped in the bottom end of liquid storage cylinder, the top of liquid storage cylinder side wall is equipped with second liquid inlet pipe, filter is equipped with in the end of second liquid inlet pipe away from liquid storage cylinder, inlet is equipped between filter and second liquid inlet pipe, it is openwork structure in filter, filter screen is equipped in filter middle, the top of side wall away from second liquid inlet pipe of filter is equipped with opening, first liquid inlet pipe is equipped on opening, air hole is equipped on the side wall of filter away from second liquid inlet pipe, air permeable membrane is equipped on air hole. The utility model is innovated filter screen air permeable membrane and other components, forms the dropping device of automatic removal bubble and air, realizes the purification of electrolyte dropping link, significantly enhances the stability of battery production process.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, specifically a quantitative dripping device for lithium-ion battery electrolyte. Background Technology

[0002] Against the backdrop of a rapidly increasing global demand for clean energy and sustainable mobility, lithium-ion batteries are widely used in various fields due to their significant advantages such as high energy density, long cycle life, and no memory effect. As a key component of lithium-ion batteries, the electrolyte conducts lithium ions between the positive and negative electrodes, significantly impacting battery performance and safety. High-quality electrolytes must possess characteristics such as high ionic conductivity, good chemical stability, and a wide electrochemical window.

[0003] The current method of electrolyte addition involves placing an undamaged, leak-free lithium-ion battery cell on a dry, clean experimental bench, storing a suitable electrolyte in a dry, sealed container to prevent moisture absorption and deterioration, and then using a syringe to slowly and evenly add electrolyte by pushing the piston or squeezing the rubber head. However, existing electrolyte addition devices often introduce a large amount of air bubbles and air into the syringe or device when adding electrolyte. These bubbles and air are injected into the lithium-ion battery along with the electrolyte, affecting battery performance and lifespan.

[0004] Therefore, there is an urgent need for an electrolyte droplet adding device with automatic bubble removal function to meet the pressing safety requirements of modern battery manufacturing. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a quantitative electrolyte addition device for lithium-ion batteries. It integrates innovative components such as a filter and a breathable membrane to form an automatic drop addition device that removes air bubbles and air, thereby purifying the electrolyte addition process and significantly enhancing the stability of the battery production process.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quantitative dripping device for lithium-ion battery electrolyte, comprising a storage cylinder: A push rod is slidably installed inside the liquid storage cylinder. The liquid storage cylinder has an outlet at the bottom end and an inlet pipe at the top of the side wall of the liquid storage cylinder. A filter is installed at the end of the inlet pipe away from the liquid storage cylinder. An inlet is provided between the filter and the inlet pipe. The filter has a hollow structure and a filter screen in the middle. An opening is provided at the top of the side wall of the filter away from the inlet pipe, and an inlet pipe is provided on the opening. A vent hole is provided on the side wall of the filter away from the inlet pipe, and a vent membrane is provided on the vent hole.

[0007] In some embodiments, the inlet pipe has a funnel structure.

[0008] In some embodiments, a plug is provided at the outlet of the bottom of the liquid storage cylinder. One end of the plug is inserted into the outlet of the bottom of the liquid storage cylinder, and the other end is located outside the liquid storage cylinder. A spring is sleeved on the outer end of the plug, and the two ends of the spring are respectively connected to the liquid storage cylinder and the outer end of the plug.

[0009] In some embodiments, the plug is slightly larger at the end facing the reservoir.

[0010] In some embodiments, the push rod has a handle at the end away from the liquid reservoir shown, and the outer wall of the handle is shaped to match the fingers.

[0011] In some embodiments, the outlet end of the liquid storage cylinder has a conical structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention's dripping device filters out mixed-in air through a sidewall filtration structure, improving safety. The funnel structure of the feed pipe effectively reduces the risk of electrolyte dripping onto the ground during filling, saving materials and protecting the environment. Placing a plug at the outlet prevents electrolyte leakage from the bottom outlet during loading, enhancing ease of operation and controllability. The slightly larger plug at one end improves the blocking effect and accuracy. A handle is carefully designed at the end of the push rod furthest from the storage tank; its ergonomic contour perfectly matches the natural shape of the fingers, enhancing comfort and stability during operation. Simultaneously, the conical outlet not only accelerates electrolyte flow but also ensures more uniform flow, reducing instability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the dripping device of this utility model; Figure 2 This is a cross-sectional view of the dripping device of this utility model; Figure 3 This is a detailed structural drawing of the liquid-blocking plug of this utility model; Figure 4 This is a cross-sectional view of the filter of this utility model.

[0014] In the diagram: 1. Liquid reservoir; 2. Push rod; 3. Inlet pipe; 4. Filter; 41. Filter screen; 42. Breathable membrane; 5. Inlet pipe; 6. Plug; 7. Spring; 8. Handle. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, 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. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0019] Please see Figures 1-4 This embodiment provides a quantitative dripping device for lithium-ion battery electrolyte, including a storage cylinder 1: A push rod 2 is slidably installed inside the liquid storage cylinder 1. The liquid storage cylinder 1 has a liquid outlet at its bottom end. A second liquid inlet pipe 3 is installed at the top of the side wall of the liquid storage cylinder 1. The second liquid inlet pipe 3 is installed on the side wall of the liquid storage cylinder 1 by welding. A filter 4 is installed at the end of the second liquid inlet pipe 3 away from the liquid storage cylinder 1. The filter 4 has a flat cylindrical structure. A liquid inlet is provided between the filter 4 and the second liquid inlet pipe 3. The liquid inlet is a circular opening. The filter 4 has a hollow structure. A filter screen 41 is provided in the middle of the filter 4. The filter screen 41 has a structure that allows liquid to enter but prevents gas from entering. The filter screen 41 divides the space inside the filter 4 into two spaces. An opening is provided at the top of the side wall of the filter 4 away from the second liquid inlet pipe 3. A first liquid inlet pipe 5 is provided on the opening. A vent hole is opened on the side wall of the filter 4 away from the second liquid inlet pipe 3. A vent membrane 42 is provided on the vent hole. The vent membrane 42 is glued to the inner side wall of the vent hole by adhesive.

[0020] like Figure 1 , 3 As shown, in actual operation, the electrolyte is first poured into the first inlet pipe 5. The poured electrolyte enters the space near the vent hole along the track of the first inlet pipe 5, then enters the space near the second inlet pipe 3 through the filter screen 41, then enters the second inlet pipe 3 from the space near the second inlet pipe 3, and then enters the interior of the storage tank 1 through the second inlet pipe 3.

[0021] When the electrolyte enters the space near the vent, the small air bubbles mixed in with the liquid will separate due to the pressure difference as the electrolyte enters a larger space from the narrow infusion tube. Since these air bubbles cannot pass through the filter screen 41, they will come out through the vent. The vent connects the space near the vent with the outside atmosphere. A breathable membrane 42 is provided in the vent. Since the electrolyte cannot pass through the breathable membrane 42, it will flow from the filter screen 41 into the space near the second inlet pipe 3.

[0022] Finally, by pushing the push rod 2 downwards to squeeze the electrolyte out of the outlet at the bottom of the reservoir 1, the filtered electrolyte can be injected into the lithium-ion battery.

[0023] In some embodiments, the first inlet pipe 5 is a funnel structure.

[0024] like Figure 2 As shown, the top of the first inlet pipe 5 is larger, while the end closer to the filter 4 is smaller. This structure can reduce the risk of electrolyte dripping onto the ground during the process of filling the electrolyte into the storage tank 1.

[0025] In some embodiments, a plug 6 is provided on the outlet at the bottom of the liquid storage cylinder 1. The plug 6 is made of soft rubber. One end of the plug 6 is inserted into the outlet at the bottom of the liquid storage cylinder 1, and the other end is located on the outside of the liquid storage cylinder 1. A spring 7 is sleeved on the outer end of the plug 6. The two ends of the spring 7 are respectively connected to the liquid storage cylinder 1 and the outer end of the plug 6. One end of the spring 7 is welded to the bottom of the liquid storage cylinder, and the other end is connected to the outer side of the plug 6 by adhesive.

[0026] like Figure 2 , 3 As shown, in actual work, in order to prevent the electrolyte from flowing out of the outlet at the bottom of the reservoir 1 when it is first filled into the reservoir 1, the plug 6 is used to block it first. When the required amount is filled, the push rod 2 is pushed forcefully. When the push rod 2 is pushed into the reservoir 1, it will generate air pressure. Since the plug 6 is sliding, the air pressure will squeeze the plug 6 outward. The spring 7 will compress the energy and inject all the electrolyte out of the reservoir 1. After that, the staff releases the push rod 2. The push rod 2 will be pushed back to its original position by the air pressure. One end of the plug 6 will also be pulled back into the reservoir 1 because the energy of the spring 7 is released.

[0027] In some embodiments, the end of the plug 6 facing the reservoir 1 is slightly larger. The slightly larger end of the plug 6 can make the plug 6 more effective in blocking the electrolyte. Since the slightly larger end completely covers the discharge port at the bottom of the reservoir 1, if it were the same size as the discharge port, various external factors, such as vibration and shaking, may cause the plug 6 to not fit completely with the discharge port at the bottom of the reservoir 1, thus failing to achieve a perfect blocking effect.

[0028] In some embodiments, the push rod 2 has a handle 8 at the end away from the liquid reservoir 1 shown, and the outer wall of the handle 8 matches the shape of a finger.

[0029] like Figure 2 As shown, the grip 8 adopts an ergonomic structure, allowing operators to easily perform one-handed operation. At the same time, the thumb structure on the grip 8 not only enhances stability and comfort during gripping but also provides additional gripping points for operators during actual work, making the grip more secure.

[0030] In some embodiments, the outlet end of the liquid storage cylinder 1 has a conical structure.

[0031] like Figure 1 As shown in Figure 1, the conical structure causes the cross-sectional area of ​​the liquid outlet to gradually decrease from the liquid storage end to the outlet end. According to the principles of fluid mechanics, when the pressure is constant, the flow velocity of the liquid increases when it flows through this structure, and it can guide the liquid out more evenly, reducing turbulence and instability.

[0032] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A quantitative dispensing device for lithium-ion battery electrolyte, comprising a storage cylinder (1), characterized in that: The liquid storage cylinder (1) is slidably provided with a push rod (2), the liquid storage cylinder (1) is provided with a liquid outlet at the bottom end, the liquid storage cylinder (1) is provided with a second liquid inlet pipe (3) at the top of the side wall of the liquid storage cylinder (1), the second liquid inlet pipe (3) is provided with a filter (4) at the end away from the liquid storage cylinder (1), the filter (4) is provided with an inlet between the filter (4) and the second liquid inlet pipe (3), the filter (4) has a hollow structure inside, the filter (4) is provided with a filter screen (41) in the middle, the filter (4) is provided with an opening at the top of the side wall away from the second liquid inlet pipe (3), the opening is provided with a first liquid inlet pipe (5), the filter (4) is provided with a vent hole on the side wall away from the second liquid inlet pipe (3), and the vent hole is provided with a vent membrane (42).

2. The lithium-ion battery electrolyte quantitative addition device according to claim 1, characterized in that: The first liquid inlet pipe (5) has a funnel structure.

3. The lithium-ion battery electrolyte quantitative addition device according to claim 2, characterized in that: A plug (6) is provided on the outlet at the bottom of the liquid storage cylinder (1). One end of the plug (6) is inserted into the outlet at the bottom of the liquid storage cylinder (1), and the other end is located outside the liquid storage cylinder (1). A spring (7) is sleeved on the outer end of the plug (6). The two ends of the spring (7) are respectively connected to the outer end of the liquid storage cylinder (1) and the plug (6).

4. The lithium-ion battery electrolyte quantitative addition device according to claim 3, characterized in that: The plug (6) is slightly larger at the end facing the reservoir (1).

5. The lithium-ion battery electrolyte quantitative addition device according to claim 1, characterized in that: The push rod (2) has a handle (8) at one end away from the liquid reservoir (1) shown, and the outer wall of the handle (8) matches the shape of the fingers.

6. The lithium-ion battery electrolyte quantitative addition device according to claim 1, characterized in that: The liquid outlet of the liquid storage cylinder (1) has a conical structure.

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