Formation liquid loss on-line detection tool
By using an online electrolyte loss detection fixture, employing a buffer cup, an inclined plane structure, and an electronic scale to monitor electrolyte loss in real time, the problems of electrolyte residue and detection errors are solved, enabling efficient and accurate detection and quality control in battery production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BATTEROTECH CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-05-08
AI Technical Summary
Existing electrolytic loss detection fixtures are prone to electrolyte residue, affecting normal equipment use, and the detection results have large errors, making it impossible to monitor electrolyte loss in real time.
Design an online detection fixture for electrolyte loss during formation. The fixture uses a buffer cup and an inclined plane structure, combined with an electronic scale for real-time weighing to ensure that the electrolyte flows back into the battery and avoids residue. It also features a transparent cup body through a vacuum pipeline for easy observation and cleaning. Corrosion-resistant hoses and straps are used to fix the pipeline, enabling simultaneous detection of multiple batteries.
It effectively avoids electrolyte residue backflow, improves the accuracy of test data, reduces equipment failure rate, improves production quality and efficiency, and ensures the traceability and data reliability of battery production.
Smart Images
Figure CN224216493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and more specifically, to an online detection tool for formation liquid loss. Background Technology
[0002] The continuous development of the new energy industry, along with the increasing demands on equipment and processes due to the joint development of various types of power batteries and energy storage batteries, has led to a surge in requirements. Among these, the formation process, as a crucial step in battery production, plays a pivotal role. A major direction in developing high-capacity batteries is to further improve the compaction effect of battery electrode materials to meet the demand for high energy density. However, while increasing the compaction of the negative electrode reduces its internal porosity, it also increases the difficulty for electrolyte to penetrate the electrode, easily resulting in significant electrolyte loss during the formation degassing process, severely impacting the performance of lithium-ion batteries. Formation liquid loss is a critical indicator in the formation process. Therefore, formation liquid loss detection equipment is indispensable in the formation process.
[0003] However, in current electrochemical liquid loss detection fixtures, electrolyte residue can easily remain inside, potentially causing backflow and affecting the normal operation of other equipment. Furthermore, electrochemical liquid loss can generally only be obtained by final weighing after the equipment has been removed from the machine. Utility Model Content
[0004] This invention provides an online detection fixture for electrolyte loss during formation, which can minimize electrolyte residue in the buffer cup, preventing backflow of electrolyte into the vacuum pipeline and affecting the normal operation of other equipment. It can also monitor the changes in electrolyte loss during the formation process in real time.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] An embodiment of this utility model provides an online detection fixture for liquid loss during formation, comprising:
[0007] A buffer cup includes a cup body and a cup bottom, the cup bottom being located within the cup body and disposed at the bottom of the cup body; the cup body has a receiving cavity, and the cup body is provided with an inlet and an outlet, both of which are used to communicate the receiving cavity with the outside;
[0008] The bottom of the cup has an inclined plane, which has a first end and a second end, the first end being lower than the second end; the position of the injection port is flush with the position of the first end; the position of the injection port is lower than the position of the outlet.
[0009] An electronic scale is disposed below the cup body and is used to weigh the buffer cup in real time.
[0010] In an optional implementation, the cup body is a transparent cup body.
[0011] In an optional embodiment, the volume of the buffer cup is 300ml to 500ml.
[0012] In an optional embodiment, the online detection fixture for liquid loss during formation further includes an inlet pipe and an outlet pipe, wherein the inlet pipe is connected to the injection port and the outlet pipe is connected to the outlet.
[0013] In an optional embodiment, the inlet pipe is a corrosion-resistant hose, and / or the outlet pipe is a corrosion-resistant hose.
[0014] In an optional embodiment, the online liquid loss detection fixture further includes a fixing belt for fixing the inlet pipe and / or the fixing belt for fixing the outlet pipe.
[0015] In an optional implementation, there are multiple buffer cups and multiple electronic scales, with each buffer cup corresponding to one electronic scale; the multiple buffer cups are arranged side by side.
[0016] In an optional embodiment, the online detection fixture for liquid loss during formation further includes a vacuum manifold; the outlets of the plurality of buffer cups are all connected through the vacuum manifold.
[0017] In an optional embodiment, the online detection fixture for liquid loss during formation further includes a vacuum tube, which is used to connect the vacuum manifold and the negative pressure pumping device.
[0018] In an optional embodiment, the online detection fixture for liquid loss during formation further includes an information collection and processing device, which is electrically connected to the electronic scale.
[0019] The beneficial effects of the online detection fixture for liquid loss during formation according to this embodiment of the present invention include, for example:
[0020] This online electrolyte loss detection fixture includes a buffer cup and an electronic scale. The buffer cup consists of a body and a bottom, with the bottom located within the body and positioned at the bottom of the body. The body has a receiving cavity and is equipped with an injection port and an outlet, both used to connect the receiving cavity to the outside. The injection port connects the buffer cup to the battery, and the outlet connects to vacuum equipment. The bottom of the cup has an inclined plane with a first end and a second end, the first end being lower than the second end. The injection port is flush with the first end and lower than the outlet. By having an inclined plane at the bottom and positioning the injection port flush with the first end of the inclined plane, it is ensured that during the atmospheric pressure settling step, the electrolyte can flow back to the battery to the maximum extent due to gravity, minimizing electrolyte residue in the buffer cup and preventing backflow of electrolyte into the vacuum pipeline, which could affect the normal operation of other equipment. The electronic scale is located below the body and is used for real-time weighing of the buffer cup. By placing an electronic scale directly below the buffer cup, the amount of electrolyte loss during the formation process can be monitored in real time, thereby improving the accuracy of data detection and ensuring battery production quality. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram from a first-view perspective of the online detection fixture for liquid loss during formation provided in an embodiment of this utility model.
[0023] Figure 2 This is a schematic diagram from a second perspective of the online detection fixture for liquid loss during formation provided in an embodiment of this utility model;
[0024] Figure 3 This is a schematic diagram of the AA cross-section provided in an embodiment of this utility model.
[0025] Icons: 1000 - Online detection fixture for liquid loss during formation; 100 - Buffer cup; 110 - Cup body; 111 - Injection port; 112 - Outlet port; 120 - Cup bottom; 121 - Inclined plane; 1211 - First end; 1212 - Second end; 130 - Receiving cavity; 200 - Electronic scale; 300 - Inlet pipe; 400 - Outlet pipe; 500 - Vacuum manifold; 600 - Vacuum tube. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0029] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, 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, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0031] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0032] The continuous development of the new energy industry, along with the increasing demands on equipment and processes due to the joint development of various types of power batteries and energy storage batteries, has led to a surge in requirements. Among these, the formation process, as a crucial step in battery production, plays a pivotal role. A major direction in developing high-capacity batteries is to further improve the compaction effect of battery electrode materials to meet the demand for high energy density. However, while increasing the compaction of the negative electrode reduces its internal porosity, it also increases the difficulty of electrolyte penetration into the electrode, easily resulting in significant electrolyte loss during the formation degassing process, severely impacting the performance of lithium-ion batteries. Formation liquid loss is a critical indicator in the formation process. Therefore, formation liquid loss detection fixtures are indispensable in the formation process. However, current formation liquid loss detection fixtures often retain electrolyte within them, potentially causing backflow and affecting the normal operation of other equipment. Furthermore, formation liquid loss can generally only be obtained through final weighing after the battery is removed from the machine. The liquid loss during negative pressure formation in conventional processes is calculated by subtracting the weight of the material from the weight of the material fed into the next process after the formation process is completed. Only the final result data is available, and the data may contain some errors.
[0033] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 The online electrolyte loss detection fixture 1000 provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. This online electrolyte loss detection fixture 1000 can minimize electrolyte residue in the buffer cup 100, preventing electrolyte residue from being drawn back into the vacuum tube 600 and affecting the normal operation of other equipment. Furthermore, it can monitor the changes in electrolyte loss during the formation process in real time, allowing technicians to develop subsequent optimization plans and thus ensure battery production quality.
[0034] Figure 1 This is a first-view schematic diagram of the online liquid loss detection fixture 1000 provided in an embodiment of this utility model; Figure 2 for Figure 1 A diagram from another perspective; Figure 3 This is a schematic diagram of the AA cross-section provided in an embodiment of this utility model.
[0035] like Figure 1 , Figure 2 and Figure 3As shown, the online liquid loss detection fixture 1000 provided in the embodiment of this utility model includes a buffer cup 100 and an electronic scale 200. The buffer cup 100 includes a cup body 110 and a cup bottom 120. The cup bottom 120 is located inside the cup body 110 and is disposed at the bottom of the cup body 110. The cup body 110 has a receiving cavity 130 and is provided with an injection port 111 and an outlet port 112. Both the injection port 111 and the outlet port 112 are used to communicate the receiving cavity 130 with the outside. The cup bottom 120 has an inclined plane 121. The inclined plane 121 has a first end 1211 and a second end 1212. The first end 1211 is lower than the second end 1212. The position of the injection port 111 is flush with the position of the first end 1211. The position of the injection port 111 is lower than the position of the outlet port 112. An electronic scale 200 is positioned below the cup body 110 and is used for real-time weighing of the buffer cup 100. The filling port 111 connects the buffer cup 100 to the battery, and the outlet 112 connects to the vacuum equipment. By making the cup bottom 120 have an inclined plane 121, and positioning the filling port 111 flush with the first end 1211 of the inclined plane 121, it is ensured that during the atmospheric pressure settling step, the electrolyte can flow through the inclined plane 121 to the filling port 111 under gravity, and then flow back into the battery to the greatest extent possible. This minimizes electrolyte residue in the buffer cup 100, preventing backflow of electrolyte into the vacuum tube 600 and affecting the normal operation of other equipment. By directly placing the electronic scale 200 below the buffer cup 100, the loss and change of electrolyte during the formation process can be monitored in real time, improving the accuracy of data detection and thus ensuring battery production quality. Data is monitored throughout the entire process, and each step is traceable. By recording the current weight data in real time during the formation process, the liquid loss data is transformed from indirect to direct data, improving data reliability. Furthermore, real-time data monitoring allows for the elimination of liquid loss caused by the consumption of electrolyte during film formation and spillage during material handling when calculating liquid loss, thus enhancing data accuracy.
[0036] The electronic scale 200 can be set with a data acquisition cycle of 1s to 10s according to the device's accuracy, and uploads the current weighing data every second, summarizing it to a designated folder for storage. Of course, the data acquisition cycle of the electronic scale 200 can also be set to other cycle lengths, which are not limited here.
[0037] In the formation process, electrolyte extraction may result in incomplete removal of residual electrolyte after production. To facilitate technicians' observation of liquid residue in the buffer cup 100, the cup body 110 in this embodiment is transparent. By making the cup body 110 transparent, technicians can easily observe the residue and dirt inside the cup body 110 when completing production or inspecting the equipment, facilitating cleaning and subsequent maintenance. Furthermore, using a transparent cup body 110 also allows technicians to easily observe changes in the liquid level, reducing the risk of electrolyte being drawn into the vacuum tube 600. In addition, this design improves the operability of tooling rework. Of course, the cup body 110 can also be made non-transparent; changes in the data from the electronic scale 200 can still be monitored in real time to see if any residual liquid remains in the buffer cup 100.
[0038] To further reduce the risk of electrolyte backflow into the 600th vacuum tube, the volume of the buffer cup 100 in this embodiment is 300ml to 500ml. For example, 300ml, 350ml, 400ml, 450ml, 500ml, etc. Increasing the volume of the buffer cup 100 can reduce the risk of electrolyte backflow into the 600th vacuum tube, thereby reducing the equipment failure rate and increasing the equipment's service life. Of course, the volume of the buffer cup 100 can also be other values, as long as it ensures that electrolyte is not easily backflowed into the 600th vacuum tube; this is not limited here.
[0039] Please see Figure 1 and Figure 2 and combined Figure 3 The online detection fixture 1000 for formation loss in this embodiment also includes an inlet pipe 300 and an outlet pipe 400. The inlet pipe 300 is connected to the injection port 111, and the outlet pipe 400 is connected to the outlet port 112. The inlet pipe 300 facilitates connection of the buffer cup 100 to the battery, and the outlet pipe 400 facilitates connection of the receiving cavity 130 within the buffer cup 100 to a vacuum device for negative pressure evacuation, thereby drawing the electrolyte from the battery into the buffer cup 100. To precisely control the inflow of liquid, a valve can be installed on the inlet pipe 300 to control the flow rate and volume of the electrolyte. Furthermore, to prevent the electrolyte from being drawn back into the vacuum tube 600 via the outlet pipe 400, a valve can also be installed on the outlet pipe 400.
[0040] Because the electrolyte is highly corrosive, the inlet pipe 300 and / or outlet pipe 400 in this embodiment are made of corrosion-resistant flexible tubing. Flexible tubing offers better flexibility, allowing for bending and shape adjustment during installation to adapt to different spaces and angles, providing good flexibility and ease of installation. Furthermore, the tubing has a smooth inner wall, reducing fluid friction within the pipe and thus improving fluid transport efficiency. Its strong wear resistance prevents damage during repeated bending and movement, reducing maintenance costs. The corrosion-resistant tubing is made of special materials, effectively resisting corrosion from chemicals, acids, alkalis, and other corrosive media, reducing the need for frequent tubing replacements and significantly extending its service life, thus lowering maintenance and replacement costs. Corrosion-resistant tubing also prevents electrolyte corrosion from causing tubing rupture or leakage, thereby preventing safety issues. Of course, the inlet pipe 300 and outlet pipe 400 can also be made of rigid tubing; this is not a limitation.
[0041] Furthermore, to prevent the inlet pipe 300 and outlet pipe 400 from shaking during the test and affecting the weighing accuracy, the online liquid loss detection fixture 1000 in this embodiment also includes a fixing strap. The fixing strap is used to fix the inlet pipe 300, and / or the fixing strap is used to fix the outlet pipe 400. The inlet pipe 300 and outlet pipe 400 are completely fixed by the fixing strap, which can reduce abnormal shaking of the inlet pipe 300 and outlet pipe 400 during the test, thereby ensuring the accuracy of the weighing value. In this embodiment, the fixing strap is a tie; of course, the fixing strap can also be replaced by buckles or other fasteners, which are not limited here.
[0042] Please see Figure 1 and Figure 2 In this embodiment, there are multiple buffer cups 100 and electronic scales 200, with each buffer cup 100 corresponding to one electronic scale 200; the multiple buffer cups 100 are arranged side by side. By setting multiple buffer cups 100 and electronic scales 200, the formation loss of multiple batteries can be detected simultaneously, and multiple batteries can be produced at the same time, improving the detection rate and thus improving production efficiency.
[0043] To enable the detection of liquid loss in multiple batteries using a single vacuum device, thereby reducing costs and equipment space requirements, the online liquid loss detection fixture 1000 in this embodiment further includes a vacuum manifold 500; the outlets 112 of multiple buffer cups 100 are all connected through the vacuum manifold 500. The online liquid loss detection fixture 1000 also includes a vacuum tube 600, which connects the vacuum manifold 500 and the negative pressure pumping device. Specifically, the vacuum manifold 500 simultaneously connects to the outlet pipes 400 of multiple buffer cups 100.
[0044] Furthermore, the online liquid loss detection fixture 1000 in this embodiment also includes an information collection and processing device, which is electrically connected to the electronic scale 200. The information collection and processing device can collect the weighing data from the electronic scale 200 in real time, process the data, and calculate the liquid loss at each step. This allows technicians to analyze the causes of liquid loss at different steps and formulate optimization plans to improve the production quality of subsequent batteries.
[0045] In summary, the online liquid loss detection fixture 1000 includes a buffer cup 100 and an electronic scale 200. The buffer cup 100 includes a cup body 110 and a cup bottom 120, with the cup bottom 120 located inside the cup body 110 and positioned at the bottom of the cup body 110. The cup body 110 has a receiving cavity 130 and is provided with an injection port 111 and an outlet port 112, both of which are used to connect the receiving cavity 130 to the outside. The cup bottom 120 has an inclined plane 121, which has a first end 1211 and a second end 1212, with the first end 1211 being lower than the second end 1212. The position of the injection port 111 is flush with the position of the first end 1211, and the position of the injection port 111 is lower than the position of the outlet port 112. The electronic scale 200 is positioned below the cup body 110 and is used to weigh the buffer cup 100 in real time. By making the bottom 120 of the cup have an inclined plane 121, and setting the position of the liquid injection port 111 flush with the first end 1211 of the inclined plane 121, it can be ensured that the electrolyte can flow back into the battery to the maximum extent by gravity during the atmospheric pressure static step, so as to minimize the amount of electrolyte remaining in the buffer cup 100 and prevent the electrolyte residue from being drawn back into the vacuum tube 600, affecting the normal operation of other equipment. By directly installing an electronic scale 200 below the buffer cup 100, the amount of electrolyte loss during the formation process can be monitored in real time, thereby improving the accuracy of data detection and ensuring the quality of battery production.
[0046] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.
Claims
1. An online detection fixture for liquid loss during chemical formation, characterized in that, include: A buffer cup (100) includes a cup body (110) and a cup bottom (120), the cup bottom (120) being located inside the cup body (110) and disposed at the bottom of the cup body (110); the cup body (110) has a receiving cavity (130), the cup body (110) being provided with an injection port (111) and an outlet port (112), the injection port (111) and the outlet port (112) being used to communicate the receiving cavity (130) with the outside; The bottom of the cup (120) has an inclined plane (121), the inclined plane (121) has a first end (1211) and a second end (1212), the first end (1211) is lower than the second end (1212); the position of the injection port (111) is flush with the position of the first end (1211); the position of the injection port (111) is lower than the position of the outlet (112); An electronic scale (200) is disposed below the cup body (110) and is used to weigh the buffer cup (100) in real time.
2. The online detection fixture for liquid loss during chemical formation according to claim 1, characterized in that, The cup body (110) is made of transparent material.
3. The online detection fixture for liquid loss during formation according to claim 1, characterized in that, The volume of the buffer cup (100) is 300ml to 500ml.
4. The online detection fixture for liquid loss during formation according to claim 1, characterized in that, The online liquid loss detection fixture (1000) further includes an inlet pipe (300) and an outlet pipe (400), wherein the inlet pipe (300) is connected to the injection port (111) and the outlet pipe (400) is connected to the outlet port (112).
5. The online detection fixture for liquid loss during formation according to claim 4, characterized in that, The inlet pipe (300) is made of corrosion-resistant hose, and / or the outlet pipe (400) is made of corrosion-resistant hose.
6. The online detection fixture for liquid loss during chemical formation according to claim 5, characterized in that, The online liquid loss detection fixture (1000) further includes a fixing belt for fixing the inlet pipe (300) and / or the fixing belt for fixing the outlet pipe (400).
7. The online detection fixture for liquid loss during formation according to any one of claims 1-6, characterized in that, The number of the buffer cups (100) and the electronic scales (200) are both multiple, and each buffer cup (100) corresponds to one electronic scale (200); the multiple buffer cups (100) are arranged side by side.
8. The online detection fixture for liquid loss during formation according to claim 7, characterized in that, The online liquid loss detection fixture (1000) further includes a vacuum manifold (500); the outlets (112) of the multiple buffer cups (100) are all connected through the vacuum manifold (500).
9. The online detection fixture for liquid loss during chemical formation according to claim 8, characterized in that, The online liquid loss detection fixture (1000) further includes a vacuum tube (600), which is used to connect the vacuum manifold (500) and the negative pressure pumping device.
10. The online detection fixture for liquid loss during formation according to claim 1, characterized in that, The online detection fixture (1000) for liquid loss during formation also includes an information collection and processing device, which is electrically connected to the electronic scale (200).