Novel simple liquid injection device and liquid injection equipment
By designing a new simple liquid injection device, the principle of hydraulic and pneumatic pressure balance of the syringe syringe is used to solve the problem of electrolyte rehydration and compatibility of multiple models in lithium-ion batteries, achieving an efficient and accurate liquid injection process, and improving production efficiency and product consistency.
Patent Information
- Application Number
- CN202420774258.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-04-12
AI Technical Summary
During the assembly process of lithium-ion batteries, it is difficult for the prior art to simply and efficiently realize the rehydration of electrolyte in the battery and compatibility with various types of batteries, resulting in low production efficiency and poor product consistency.
A new simple liquid injection device is designed, including a base, a liquid injection mechanism and optional weighing and data entry mechanism. The liquid injection mechanism obtains electrolyte from the outside through the liquid extraction pipeline, conveying components and liquid injection pipeline, and uses the principle of hydraulic and air pressure balance of the syringe to achieve compatible liquid injection for various types of batteries.
This device simplifies the battery liquid injection process, improves production efficiency, ensures the accuracy of the electrolyte injection volume, improves product consistency and cycle life, and reduces manufacturing costs and process complexity.
Smart Images
Figure CN222775560U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of battery liquid injection, in particular to a novel simple liquid injection device and liquid injection equipment. Background Art
[0002] In daily life, lithium-ion batteries have been widely used and popularized in various fields. During the assembly process of lithium-ion batteries, a certain amount of electrolyte needs to be injected into the battery. The injection process must be carried out by a high-precision injection machine. However, during the production process, it is inevitable that the amount of electrolyte injected into the battery is insufficient and needs to be replenished, or a production line needs to be compatible with the production of multiple models of products at the same time.
[0003] In order to ensure the compatibility of various production line models or different process paths, it was usually adopted in the past to add a semi-automatic liquid injection device outside the automatic line for liquid injection. The semi-automatic liquid injection is generally equipped with a set of parts such as a liquid injection pump, a liquid injection tank, and a vacuum pump. The equipment investment cost is relatively high and occupies a large area. How to solve the battery replenishment problem in a simple way is an important issue in the current lithium battery manufacturing field. Utility Model Content
[0004] The embodiment of the utility model provides a novel simple liquid injection device and liquid injection equipment, which solves the problem of simply replenishing liquid to a battery.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a novel simple liquid injection device on the one hand, and the liquid injection device comprises:
[0006] A base, the base comprising a supporting mechanism and a placing platform, the placing platform being arranged on one side of the supporting mechanism;
[0007] The liquid injection mechanism is arranged on the supporting mechanism, and the liquid injection mechanism comprises:
[0008] A liquid collection pipeline, one end of which is connected to an external liquid inlet for obtaining electrolyte from the outside;
[0009] A conveying assembly, the conveying assembly comprising a conveying pipeline, one end of which is connected to the other end of the liquid extraction pipeline and is used to transport the electrolyte;
[0010] An injection pipe, one end of which is connected to the other end of the delivery pipe, and the other end of which is connected to the injection port of the battery, for injecting the electrolyte into the battery.
[0011] Optionally, the delivery component includes a syringe barrel, one end of which is connected to the delivery pipeline for storing the electrolyte.
[0012] Optionally, the delivery assembly includes a piston shaft handle, which is disposed in the syringe barrel and is used to squeeze the electrolyte in the syringe barrel into the delivery pipe.
[0013] Optionally, the conveying assembly includes a blocking cylinder, one end of which is connected to the other end of the piston shaft handle for controlling the compression and rebound of the piston shaft handle.
[0014] Optionally, the conveying assembly comprises:
[0015] A first regulating valve, disposed at the connection between the liquid extraction pipeline and the delivery pipeline, for controlling the electrolyte to enter the syringe barrel;
[0016] The second regulating valve is arranged at the connection between the delivery pipeline and the injection pipeline, and is used to control the electrolyte in the syringe barrel to enter the injection pipeline.
[0017] Optionally, the conveying assembly further comprises:
[0018] An air injection pipeline, one end of which is connected to the other end of the blocking cylinder and is used to transport air;
[0019] A pressure reducing valve is connected to the other end of the gas injection pipeline and is used to detect the gas pressure in the gas injection pipeline.
[0020] Optionally, the liquid injection device comprises:
[0021] A control valve, disposed at the connection between one end of the liquid intake pipeline and the external liquid inlet, for controlling the opening or closing of the electrolyte injection into the liquid intake pipeline;
[0022] The liquid injection nozzle is connected to the other end of the liquid injection pipe and is used to extend into the battery to inject electrolyte.
[0023] Optionally, the liquid injection device includes a weighing mechanism, which is disposed on the placement platform and is used to weigh the battery before and after liquid injection.
[0024] Optionally, the liquid injection device includes a data entry mechanism, which is arranged on the other side of the supporting mechanism and is used to record weight information of the battery before and after liquid injection.
[0025] On the other hand, the utility model provides a liquid injection device, which includes an electrolyte storage bottle and any of the liquid injection devices described above.
[0026] Through the above technical scheme, the utility model provides a new type of simple liquid injection device and liquid injection equipment, which obtains electrolyte from the outside through a liquid collection pipe, transports the electrolyte through a conveying pipe of a conveying component, and injects the electrolyte into the battery through the liquid injection pipe. It also adopts the hydraulic and air pressure balance principle of the syringe barrel, and can achieve compatibility with various types of batteries without adjusting the structural parts, thereby improving production efficiency and ensuring the accuracy of the electrolyte injection amount in the battery, thereby improving a series of performance such as product consistency, cycle life, high and low temperature charging and discharging, while reducing manufacturing costs and simplifying the process. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a schematic diagram of a liquid injection device according to one embodiment of the utility model;
[0028] Figure 2 It is a schematic diagram of a partial structure of a liquid injection device according to an embodiment of the utility model.
[0029] Description of Reference Numerals
[0030] 1. Base 2. Support mechanism
[0031] 3. Placement platform 4. Liquid injection mechanism
[0032] 5. Liquid collection pipeline 6. Transport components
[0033] 7. Delivery pipeline 8. Liquid injection pipeline
[0034] 9. Syringe barrel 10. Piston shaft handle
[0035] 11. Blocking cylinder 12. First regulating valve
[0036] 13. Second regulating valve 14. Gas injection pipeline
[0037] 15. Pressure reducing valve 16. Control valve
[0038] 17. Weighing mechanism 18. Data entry mechanism
[0039] 19. Liquid injection nozzle DETAILED DESCRIPTION
[0040] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0041] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.
[0042] In addition, if there are descriptions involving "first", "second", etc. in the implementation of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various implementations can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0043] Figure 1 is a schematic diagram of a liquid injection device according to an embodiment of the utility model, Figure 2 It is a schematic diagram of a partial structure of a liquid injection device according to an embodiment of the utility model. In the figure, the liquid injection device includes a base 1 and a liquid injection mechanism 4. Among them, the base 1 includes a support mechanism 2 and a placement platform 3, and the placement platform 3 is arranged on one side of the support mechanism 2. The liquid injection mechanism 4 is arranged on the support mechanism 2, and the liquid injection mechanism 4 includes a liquid collection pipe 5, a conveying component 5 and a liquid injection pipe 8. Further, the conveying component 5 includes a conveying pipe 7. One end of the liquid collection pipe 5 is connected to the external liquid inlet, one end of the conveying pipe 7 is connected to the other end of the liquid collection pipe 5, one end of the liquid injection pipe 8 is connected to the other end of the conveying pipe 7, and the other end of the liquid injection pipe 8 is connected to the liquid injection port of the battery. When the battery is injected, the electrolyte is obtained from the outside through the liquid collection pipe 5, the electrolyte is transported to the liquid injection pipe 8 through the conveying pipe 7, and finally the electrolyte is injected into the battery by the liquid injection pipe 8. The utility model greatly reduces the equipment investment cost and simplifies the production process through the selection and assembly of simple materials. The important liquid injection process requirements in lithium-ion batteries can be achieved with extremely low cost investment, and a single production line can also achieve the function of being compatible with the simultaneous production of multiple types of batteries and different process paths.
[0044] In this embodiment, the amount of electrolyte temporarily stored in the delivery pipe 7 is limited and small. Considering that the amount of electrolyte injected into the battery at a single time needs to be increased to meet the injection requirements of batteries of different models, the delivery assembly 5 may include a syringe barrel 9 for storing electrolyte. The position of the syringe barrel 9 may be any of a variety of positions known to those skilled in the art, provided that one end of the syringe barrel 9 is connected to the delivery pipe 7. In one example of the present utility model, the syringe barrel 9 is located in the middle of the delivery pipe 7.
[0045] In this embodiment, in order to transport the electrolyte in the syringe barrel 9 to the delivery pipe 7, the delivery assembly 5 includes a piston shaft handle 10, and the piston shaft handle 10 is arranged in the syringe barrel 9. The piston shaft handle 10 squeezes the electrolyte in the syringe barrel 9 into the delivery pipe 7, realizing an automated injection process, improving production efficiency and the automation level of the production line.
[0046] In this embodiment, the method for driving the piston shaft handle 10 can be various methods known to those skilled in the art. In a preferred example of the present invention, the delivery assembly 5 further includes a blocking cylinder 11. One end of the blocking cylinder 11 is connected to the other end of the piston shaft handle 10. The compression and rebound of the piston shaft handle 10 are controlled by the blocking cylinder 11, thereby realizing the automatic adjustment function of the electrolyte level in the syringe barrel 9 and improving the working efficiency.
[0047] In this embodiment, the specific structure of the conveying component 5 can be various known to those skilled in the art, provided that the electrolyte is transported. In a preferred example of the present invention, the conveying component 5 may include a first regulating valve 12 and a second regulating valve 13. The first regulating valve 12 is disposed at the connection between the liquid extraction pipeline 5 and the delivery pipeline 7, and is used to control the electrolyte to enter the syringe barrel 9; the second regulating valve 13 is disposed at the connection between the delivery pipeline 7 and the injection pipeline 8, and is used to control the electrolyte in the syringe barrel 9 to enter the injection pipeline 8. During the injection process, at the beginning, the first regulating valve 12 is opened and the second regulating valve 13 is closed, and the electrolyte is injected into the syringe barrel 9. When the electrolyte is filled inside the syringe barrel 9, the first regulating valve 12 is closed and the second regulating valve 13 is opened, so that the electrolyte in the syringe barrel 9 enters the delivery pipeline 7 and the injection pipeline 8.
[0048] In this embodiment, the specific structure of the delivery component 5 can be various known to those skilled in the art under the premise of satisfying the transportation of electrolyte. In a preferred example of the present utility model, the delivery component 5 can include an injection pipeline 14 and a pressure reducing valve 15. Among them, one end of the injection pipeline 14 is connected to the other end of the blocking cylinder 11 for transporting air. The pressure reducing valve 15 is connected to the other end of the injection pipeline 14 for detecting the air pressure in the injection pipeline 14. By adopting the hydraulic and air pressure balance principle of the syringe barrel 9, the accuracy of the electrolyte injection amount in the battery is guaranteed. Further, for the type of pipeline, it can be various known to those skilled in the art. In an example of the present utility model, the liquid collection pipeline 5 is a polyvinyl fluoride pipeline with a diameter of 10mm, the half of the delivery pipeline 7 connected to the liquid collection pipeline 5 is a polyvinyl fluoride pipeline with a diameter of 10mm, the delivery pipeline 7 connecting the syringe barrel 9 and the injection pipeline 8 is a polyvinyl fluoride pipeline with a diameter of 4mm, the injection pipeline 8 is a polyvinyl fluoride pipeline with a diameter of 4mm, and the injection pipeline 14 is a PU hose with a diameter of 10mm.
[0049] In this embodiment, the specific structure of the injection device can be any of the various structures known to those skilled in the art, provided that the electrolyte is injected into the battery. In one example of the present invention, the injection device includes a control valve 16 and an injection nozzle 19. The control valve 16 is disposed at the connection between one end of the liquid extraction pipe 5 and the external liquid inlet to control the opening or closing of the electrolyte injection into the liquid extraction pipe 5. The injection nozzle 19 is connected to the other end of the injection pipe 8 and is used to extend into the battery to inject the electrolyte, and the injection nozzle 19 is made of a polycarbonate material with high transparency, extremely high temperature resistance, and chemical corrosion resistance. Through the bending and extension of the injection pipe 8, the alignment function of the injection nozzle 19 and the injection port of the battery to be injected can be achieved without adjusting or modifying the equipment mechanism, and the injection requirements of various battery models can be compatible.
[0050] In this embodiment, the injection device includes a weighing mechanism 17, which is arranged on the placement platform 3 and is used to weigh the battery before and after the injection. The specific composition of the weighing mechanism 17 can be a variety of known to those skilled in the art, provided that the battery can be weighed. In one example of the present utility model, the weighing mechanism 17 can be an electronic scale. The weighing range of the electronic scale is 10kg, the repeated weighing accuracy is ±0.1g, and it has an automatic zeroing function. The touch screen has zeroing and calibration functions for easy calibration. At the same time, the electronic scale can be selected with a model with a data transmission interface to realize the automatic reception and automatic upload of data, and the internal gravity sensor is installed with effective protection to prevent electrolyte corrosion.
[0051] In this embodiment, the injection device includes a data entry mechanism 18, which is arranged on the other side of the support mechanism 2 and is used to record the weight information of the battery before and after injection. The specific composition of the data entry mechanism 18 can be a variety known to those skilled in the art, provided that the battery weight is recorded. In one example of the utility model, the data entry mechanism 18 can be an electronic barcode scanner. The electronic barcode scanner can upload information to a local database or MES system, and at the same time, through the data transmission port of the electronic scale, correspond the weighing data to the corresponding battery barcode for later data tracing.
[0052] On the other hand, the utility model provides a liquid injection device, which includes an electrolyte storage bottle and any of the liquid injection devices described above.
[0053] Through the above technical scheme, the utility model provides a new type of simple liquid injection device and liquid injection equipment, which obtains electrolyte from the outside through a liquid collection pipe, transports the electrolyte through a conveying pipe of a conveying component, and injects the electrolyte into the battery through the liquid injection pipe. It also adopts the hydraulic and air pressure balance principle of the syringe barrel, and can achieve compatibility with various types of batteries without adjusting the structural parts, thereby improving production efficiency and ensuring the accuracy of the electrolyte injection amount in the battery, thereby improving a series of performance such as product consistency, cycle life, high and low temperature charging and discharging, while reducing manufacturing costs and simplifying the process.
[0054] The optional implementation modes of the utility model examples are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the utility model, various simple modifications can be made to the technical solutions of the implementation modes of the utility model. These simple modifications all belong to the protection scope of the implementation modes of the utility model.
[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of the embodiments of the present utility model will not be described separately.
[0056] In addition, various different embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.
Claims
1. A new type of simple liquid injection device, characterized in that: The liquid injection device comprises: A base, the base comprising a supporting mechanism and a placing platform, the placing platform being arranged on one side of the supporting mechanism; The liquid injection mechanism is arranged on the supporting mechanism, and the liquid injection mechanism comprises: A liquid collection pipeline, one end of which is connected to an external liquid inlet for obtaining electrolyte from the outside; A conveying assembly, the conveying assembly comprising a conveying pipeline, one end of which is connected to the other end of the liquid extraction pipeline and is used to transport the electrolyte; An injection pipe, one end of which is connected to the other end of the delivery pipe, and the other end of which is connected to the injection port of the battery, for injecting the electrolyte into the battery.
2. The liquid injection device according to claim 1, characterized in that: The delivery assembly comprises a syringe barrel, one end of which is connected to the delivery pipeline and is used to store the electrolyte.
3. The liquid injection device according to claim 2, characterized in that: The delivery assembly comprises a piston shaft handle, which is disposed in the syringe barrel and is used to squeeze the electrolyte in the syringe barrel into the delivery pipeline.
4. The liquid injection device according to claim 3, characterized in that: The conveying assembly comprises a blocking cylinder, one end of which is connected to the other end of the piston shaft handle and is used to control the compression and rebound of the piston shaft handle.
5. The liquid injection device according to claim 2, characterized in that: The conveying assembly comprises: A first regulating valve, disposed at the connection between the liquid extraction pipeline and the delivery pipeline, for controlling the electrolyte to enter the syringe barrel; The second regulating valve is arranged at the connection between the delivery pipeline and the injection pipeline, and is used to control the electrolyte in the syringe barrel to enter the injection pipeline.
6. The liquid injection device according to claim 4, characterized in that: The conveying assembly also includes: An air injection pipeline, one end of which is connected to the other end of the blocking cylinder and is used to transport air; A pressure reducing valve is connected to the other end of the gas injection pipeline and is used to detect the gas pressure in the gas injection pipeline.
7. The liquid injection device according to claim 1, characterized in that: The liquid injection device includes a control valve, which is arranged at the connection between one end of the liquid extraction pipeline and the external liquid inlet, and is used to control opening or closing of the electrolyte injection into the liquid extraction pipeline; The liquid injection nozzle is connected to the other end of the liquid injection pipe and is used to extend into the battery to inject electrolyte.
8. The liquid injection device according to claim 1, characterized in that: The liquid injection device comprises a weighing mechanism, which is arranged on the placement platform and is used to weigh the battery before and after liquid injection.
9. The liquid injection device according to claim 1, characterized in that: The liquid injection device comprises a data entry mechanism, which is arranged on the other side of the supporting mechanism and is used to record the weight information of the battery before and after liquid injection.
10. A liquid injection device, characterized in that: The liquid injection equipment comprises an electrolyte storage bottle and a liquid injection device as described in any one of claims 1-9.