Electrolyte gas concentration detection system and liquid injection machine

Abstract

The utility model discloses an electrolyte gas concentration detection system and a liquid injection machine, the electrolyte gas concentration detection system comprises a liquid injection module, the liquid injection module comprises a liquid injection device, the liquid injection device is provided with one or more liquid injection cavities, the liquid injection cavities are used for placing battery cells, and the liquid injection cavities are provided with first detection ports; and the gas concentration module comprises a gas concentration detection device, the gas concentration detection device is connected with the first detection port through a first connecting pipe, and the first connecting pipe is suitable for conveying the electrolyte gas in the liquid injection cavity to the gas concentration detection device through the first detection port. The electrolyte gas concentration detection system is applied to the liquid injection machine, the liquid outlet of the standing module of the liquid injection machine is connected with the liquid injection module, and the standing module provides the electrolyte with bubbles eliminated for the liquid injection module. And the electrolyte gas concentration is effectively monitored through the electrolyte gas concentration detection system, so that the electrolyte gas can be prevented from leaking to the external environment, and the production and environmental protection benefits are improved.

Description

Technical Field

[0001] This utility model relates to the field of electrolyte injection production technology, and in particular to an electrolyte gas concentration detection system and an injection machine. Background Technology

[0002] The battery manufacturing process includes a cell electrolyte injection step. When the cell is injected, the electrolyte enters the injection chamber. After a negative pressure is formed in the injection chamber, the injection device begins the injection process. After the injection is completed, the chamber door is opened to inject the next set of cells. However, the electrolyte will produce electrolyte gas during the injection process. This electrolyte gas contains gases that can affect the external environment. If it leaks into the external environment, it will cause pollution.

[0003] Therefore, this application proposes a technical solution that solves the above problems. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electrolyte gas concentration detection system that can prevent electrolyte gas leakage into the external environment, achieve effective monitoring of electrolyte gas concentration, and ensure environmentally friendly production. In addition, this application also provides a liquid injection machine that applies the above-mentioned electrolyte gas concentration detection system to improve the environmental benefits of production and provide strong technical support for the battery manufacturing process.

[0005] In a first aspect, an electrolyte gas concentration detection system according to an embodiment of the present invention includes:

[0006] The liquid injection module includes a liquid injection device, which is provided with one or more liquid injection chambers. The liquid injection chambers are used to insert battery cells and are provided with a first detection port.

[0007] The gas concentration module includes a gas concentration detection device, which is connected to a first detection port via a first connecting pipe. The first connecting pipe is adapted to deliver the electrolyte gas in the injection chamber to the gas concentration detection device through the first detection port.

[0008] An electrolyte degassing device according to an embodiment of the present invention has at least the following beneficial effects: When the electrolyte is injected into the battery cell, highly volatile gases in the electrolyte will evaporate into the injection chamber. After one or more sets of battery cells are injected, the injection chamber is filled with gases evaporated from the electrolyte. Since these gases are harmful to the external environment, they cannot be directly discharged and need to be recovered or their emission concentration must meet emission requirements before they can be discharged outside the injection chamber.

[0009] Specifically, after one or more sets of battery cells have been injected with electrolyte, the electrolyte gas in the injection chamber is transported to a gas concentration detection device for sampling and testing through the first detection port of the injection chamber. If the electrolyte gas in the sampled injection chamber passes the test, the next set of battery cells can be processed for the corresponding injection chamber. If the electrolyte gas in the sampled injection chamber fails the test, the electrolyte gas in the corresponding injection chamber needs to be treated before the next set of battery cells can be injected.

[0010] This application, through effective monitoring of electrolyte gas concentration, can prevent electrolyte gas from leaking into the external environment, thus ensuring environmentally friendly production.

[0011] According to an embodiment of the present invention, an electrolyte gas concentration detection system includes an air filter, a first detection port connected to the air filter via a second connecting pipe, and an air inlet of the first connecting pipe connected to an air outlet of the air filter.

[0012] According to an embodiment of the present invention, an electrolyte gas concentration detection system includes a gas concentration detection device comprising a flow meter, the flow meter being connected to a first detection port via a third connecting pipe, and the inlet end of the first connecting pipe being connected to the outlet end of the flow meter.

[0013] An electrolyte gas concentration detection system according to an embodiment of the present invention includes an air filter and a flow meter arranged sequentially along the gas flow direction, wherein the air filter, flow meter, and gas concentration detection device are connected in series.

[0014] According to an embodiment of the present invention, an electrolyte gas concentration detection system is provided with a first valve at the first detection port, and the gas outlet of the first valve is connected to a gas concentration detection device through a first connecting pipe.

[0015] According to an embodiment of the present invention, an electrolyte gas concentration detection system is provided with a second valve on a first connecting pipe, and the second valve is connected in parallel with a gas concentration detection device.

[0016] According to an embodiment of the present invention, an electrolyte gas concentration detection system includes an injection device comprising a vacuum valve, which is connected to the injection chamber via a pipeline.

[0017] According to an embodiment of the present invention, an electrolyte gas concentration detection system includes an injection device comprising a vacuum breaking valve, which is connected to the injection chamber via a pipeline.

[0018] Secondly, according to an embodiment of the present invention, a liquid injection machine utilizes the aforementioned electrolyte gas concentration detection system.

[0019] According to an embodiment of the present invention, a liquid injection machine has at least the following beneficial effects: When the electrolyte is injected into the battery cell, highly volatile gases in the electrolyte will evaporate into the injection chamber. After one or more sets of battery cells are injected, the injection chamber is filled with gases evaporated from the electrolyte. Since these gases are harmful to the external environment, they cannot be directly discharged and need to be recovered or their emission concentration must meet emission requirements before they can be discharged outside the injection chamber.

[0020] Specifically, after one or more sets of battery cells have been injected with electrolyte, the electrolyte gas in the injection chamber is transported to a gas concentration detection device for sampling and testing through the first detection port of the injection chamber. If the electrolyte gas in the sampled injection chamber passes the test, the next set of battery cells can be processed for the corresponding injection chamber. If the electrolyte gas in the sampled injection chamber fails the test, the electrolyte gas in the corresponding injection chamber needs to be treated before the next set of battery cells can be injected.

[0021] The electrolyte injection machine of this application effectively monitors the electrolyte gas concentration through an electrolyte gas concentration detection system, which can prevent electrolyte gas from leaking into the external environment and improve the environmental benefits of production.

[0022] According to an embodiment of the present invention, a liquid injection machine includes a settling module, the liquid outlet of which is connected to the liquid injection module, and the settling module provides the liquid injection module with an electrolyte that has been de-air-prone.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of an electrolyte gas concentration detection system according to an embodiment of the present invention;

[0026] Figure 2 This is a first structural diagram of an electrolyte degassing device according to an embodiment of the present invention;

[0027] Figure 3 This is a flow diagram of the cleaning fluid according to an embodiment of the present invention;

[0028] Figure 4 This is a flow diagram of the electrolyte being injected into the settling tank according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] Liquid injection chamber 1;

[0031] Gas concentration detection device 2;

[0032] Air filter 3;

[0033] Flow meter 4;

[0034] First valve 5;

[0035] Second valve 6;

[0036] Vacuum valve 7;

[0037] Vacuum breaking valve 8;

[0038] Pressure gauge 9;

[0039] 100 saturation tank;

[0040] First liquid supply pipe 200;

[0041] 300 injection module;

[0042] Vacuum pumping device 400;

[0043] Filter device 500;

[0044] Cleaning fluid storage tank 600;

[0045] Waste liquid tank 700;

[0046] Vacuum tube 800;

[0047] Electrolyte output mechanism 900. Detailed Implementation

[0048] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0049] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0050] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0051] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0052] Reference Figure 1 This utility model provides an electrolyte gas concentration detection system.

[0053] Specifically, such as Figure 1 As shown, the electrolyte gas concentration detection system mainly consists of an injection module 300 and a gas detection module. The injection module 300 has multiple injection chambers 1 to simultaneously inject electrolyte into multiple battery cells, thereby improving production efficiency.

[0054] Optionally, one injection chamber 1 can be configured to correspond to one gas detection module.

[0055] Preferably, this application provides a gas detection module that can provide gas detection for multiple injection chambers 1 in turn. The gas detection module is connected to the multiple injection chambers 1 through a parallel pipeline layout.

[0056] Specifically, as shown in the figure, the gas detection module includes an air filter 3, a flow meter 4, and a gas concentration detection device 2 arranged sequentially along the gas delivery direction. The air filter 3 filters out impurities and particles from the electrolyte gas, while the flow meter 4 measures the flow rate of the electrolyte gas. Together, they ensure the accuracy of the detection.

[0057] Furthermore, each injection chamber 1 is equipped with a first valve 5 at its first detection port. During testing, the user can open the first valve 5 of the corresponding injection chamber 1 to allow the sampled gas to be delivered to the gas detection module, while the first valves 5 of other injection chambers 1 are closed at this time. This prevents the electrolyte gas in other injection chambers 1 from causing data errors to the injection chamber 1 currently being tested, thus ensuring the accuracy of the test.

[0058] It is understandable that the first valve 5 can independently switch the connection between the corresponding injection chamber 1 and the gas detection module.

[0059] Once the gas detection is passed, the user can open the second valve 6 at the exhaust end of the injection chamber 1 to release the gas in the injection chamber 1 to the outside or other recovery devices. After the gas is released, the user can directly open the hatch of the injection chamber 1 to carry out the next set of cell injection operations.

[0060] Optionally, the user can set a second valve 6 separately for venting through the injection chamber 1, or multiple injection chambers 1 can share a second valve 6, with the second valve 6 connected in parallel to the injection chamber 1 through a pipeline.

[0061] Furthermore, after completing one gas detection, it is necessary to wait for the residual electrolyte gas in the first connecting pipe and the gas detection module to be completely discharged before proceeding, in order to avoid large errors in the detection results of other injection chambers 1 and to ensure the accuracy of the detection.

[0062] Preferably, an exhaust fan can be connected to the gas outlet of the gas detection module and the gas outlet of the first valve 5 to assist in the discharge and improve efficiency.

[0063] According to some embodiments of this application, the injection chamber 1 is also connected to a vacuum valve 7 and a vacuum breaking valve 8. The vacuum valve 7 is connected to an external vacuum device 400, while the vacuum breaking valve 8 can directly connect the injection chamber 1 to the outside.

[0064] Specifically, after a set of battery cells is filled with electrolyte, the electrolyte gas fills the filling chamber 1, creating a pressure difference between the filling chamber 1 and the first valve 5. Therefore, to ensure that the sampled gas can smoothly enter the gas detection module, the user needs to open the vacuum breaking valve 8 before opening the first valve 5 to increase the gas pressure in the filling chamber 1. This allows the sampled gas to be delivered to the gas detection module for detection after the user opens the first valve 5.

[0065] After the user places the next set of battery cells to be injected into the injection chamber 1 and closes the chamber door, the user opens the vacuum valve 7 and uses the vacuum device 400 to create a negative pressure environment inside the injection chamber 1. The injection machine can then begin the injection operation. After injection is complete, the gas detection step is repeated.

[0066] Furthermore, each injection chamber 1 is connected to a pressure gauge 9 to monitor the pressure inside the injection chamber 1 and ensure the quality of the battery cell injection.

[0067] Furthermore, such as Figures 2 to 4 This application also provides a liquid injection machine that uses the above-mentioned electrolyte gas concentration detection system.

[0068] Specifically, the liquid injection machine mainly includes an electrolyte gas concentration detection system, a settling module, a liquid supply module, and a liquid injection module 300, all connected by pipelines.

[0069] The settling module includes two or more settling tanks 100 for loading electrolyte. The settling tanks 100 are connected in parallel to enable simultaneous or alternating operation. The settling tanks 100 are used to settling electrolyte to eliminate bubbles. The supply module is equipped with a supply pipe for supplying electrolyte to the settling tanks 100 to eliminate bubbles. The outlet end of the supply pipe is connected to the settling tanks 100. The injection module 300 is connected to the outlet of the settling tanks 100 to inject electrolyte to the battery cells to eliminate bubbles.

[0070] To shorten the efficiency of bubble elimination in the settling tank 100, preferably, when the settling tank 100 is in operation, the interior of the settling tank 100 is a vacuum working environment, so that the electrolyte containing bubbles can accelerate the bubble elimination speed under vacuum conditions. Specifically, as shown in the figure, a vacuum pumping device 400 is connected to the settling tank 100.

[0071] Optionally, multiple vacuum devices 400 may be provided, with the specific number set according to the actual number of settling tanks 100, so that one vacuum device 400 is independently connected to one settling tank 100.

[0072] Preferably, as shown in the figure, only one vacuum pumping device 400 is provided. This device is connected in parallel to multiple settling tanks 100 via pipelines, allowing it to operate simultaneously or in rotation for all tanks 100, thus reducing equipment costs. Furthermore, each settling tank 100 is equipped with an independent control valve on its connecting pipeline, enabling individual operation for each tank requiring vacuuming. Optionally, the vacuum valve 7 on the injection chamber 1 can share the same vacuum pumping device 400 with the settling tanks 100.

[0073] Furthermore, to ensure the product quality of the battery cells, this application preferably filters the electrolyte entering the settling tank 100. As shown in the figure, a filter device 500 is connected to the inlet of the settling tank 100. Specifically, the electrolyte supply tank delivers the electrolyte with unremoved air bubbles to the filter device 500 through the first supply pipe 200, and after filtration, it is then delivered to the settling tank 100 for settling treatment.

[0074] Optionally, multiple filter units can be set up, and a settling tank 100 can be set up with a filter device 500 for individual filtration operations.

[0075] Preferably, as shown in the figure, there may be only one filter device 500, which is connected in parallel to multiple settling tanks 100 via pipelines. Furthermore, each settling tank 100 is equipped with an independent control valve on the connecting pipeline between the filter device 500 and each settling tank 100, so that the settling tank 100 that needs to be injected with electrolyte can be operated individually.

[0076] According to some embodiments of this application, this application also includes a cleaning module for cleaning the liquid injection module 300. Specifically, as shown in the figure, the cleaning module includes a cleaning device and a waste liquid collection device. The outlet of the cleaning device is connected to the cleaning liquid inlet of the liquid injection module 300, while the waste liquid tank 700 is connected to the outlet of the liquid injection module 300.

[0077] It is understandable that when the injection module 300 needs to be cleaned, the cleaning device will deliver the cleaning fluid containing the cleaning agent into the injection module 300, and then discharge the cleaning fluid into the waste liquid tank 700 after the cleaning fluid stays in the injection module 300 for a period of time.

[0078] Alternatively, the cleaning fluid can be filled into the injection module 300 and then discharged into the waste liquid tank 700, where the continuous flow of liquid carries away any residual liquid inside the injection module 300. The waste liquid tank 700 recycles the used cleaning fluid, preventing environmental pollution.

[0079] Optionally, the cleaning device includes a pump and a cleaning fluid storage tank 600, the pump being able to deliver the cleaning fluid in the cleaning fluid storage tank 600 to the injection module 300.

[0080] Preferably, as shown in the figure, the waste liquid collection device includes a waste liquid tank 700 and a vacuum tube 800, wherein one end of the vacuum tube is connected to the bottom of the waste liquid tank 700, and the other end is connected to the vacuum device 400. The vacuum device 400 creates a pressure difference between the waste liquid tank 700 and the cleaning fluid storage tank 600, allowing the cleaning fluid to be drawn and transported into the injection module 300 and discharged into the waste liquid tank 700.

[0081] Specifically, as shown in the figure, one end of the vacuum tube 800 extends from the bottom of the waste liquid tank 700 and passes through the bottom of any of the settling tanks 100. After passing through the settling tank 100, it is connected to the vacuum device 400, so as to make the overall structure of the equipment more compact and reduce the space occupancy rate.

[0082] Furthermore, the electrolyte injection module 300 is connected to multiple electrolyte output mechanisms 900. Correspondingly, each electrolyte output mechanism 900 is connected to the electrolyte injection chamber 1, and each electrolyte output mechanism 900 and the electrolyte injection module 300 can be provided with a corresponding outlet valve, so that the electrolyte output mechanism 900 can inject electrolyte into multiple cells at the same time or facilitate the user to use any one electrolyte output mechanism 900 individually according to actual needs.

[0083] The electrolyte injection machine of this application effectively monitors the electrolyte gas concentration through an electrolyte gas concentration detection system, preventing electrolyte gas leakage into the external environment and improving environmental benefits. Simultaneously, the injection machine uses two or more parallel-connected settling tanks 100 to simultaneously settle the electrolyte and eliminate air bubbles. The working modes of the settling tanks 100 can be adjusted according to actual production conditions, allowing them to work simultaneously or alternately. This ensures that the injection process is not affected by the settling time, guaranteeing the efficiency of the injection machine, ensuring production efficiency, and improving equipment utilization and flexibility.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrolyte gas concentration detection system characterized by comprising: The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system.

2. The electrolyte gas concentration detection system according to claim 1, wherein The application relates to an electrolyte gas concentration detection system.

3. The electrolyte gas concentration detection system according to claim 2, wherein The application relates to an electrolyte gas concentration detection system.

4. The electrolyte gas concentration detection system of claim 1, wherein The application relates to an electrolyte gas concentration detection system.

5. The electrolyte gas concentration detection system of claim 1, wherein The application relates to an electrolyte gas concentration detection system.

6. The electrolyte gas concentration detection system according to claim 5, wherein The application relates to an electrolyte gas concentration detection system.

7. The electrolyte gas concentration detection system of claim 1, wherein The application relates to an electrolyte gas concentration detection system.

8. The electrolyte gas concentration detection system of claim 1, wherein The application relates to an electrolyte gas concentration detection system.

9. A liquid injection machine characterized by comprising: The application relates to an electrolyte gas concentration detection system.

10. The liquid injection machine of claim 9, wherein, The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. The application relates to an electrolyte gas concentration detection system. 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