Electrolyte infiltration performance testing device of pole piece and battery cell production system
By designing an electrolyte wetting performance test device for electrodes and using the ratio of diffusion area to time to calculate the diffusion rate, the problem of high cost and complexity in the existing technology of electrolyte wetting performance evaluation is solved, and low-cost and efficient wetting performance testing is achieved, which is suitable for battery cell production.
Patent Information
- Application Number
- CN202422561078.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-22
AI Technical Summary
In the prior art, the evaluation method of the wettability of the electrolyte on the electrode is costly and complicated to operate, and there is a lack of a simple, efficient and accurate evaluation device.
Provided is a device for testing the electrolyte wetting performance of an electrode, comprising a base plate, a bracket, an electrolyte tank, a detector, and a signal processing device. By monitoring the diffusion area and diffusion time of the electrolyte on the electrode, the diffusion rate is calculated using the ratio of the diffusion area to the time, thereby achieving rapid evaluation of the wetting performance of the electrode.
The device has a simple structure, low cost, and easy operation. It can quickly and efficiently detect the wetting performance of the electrode, does not require special training, saves time, and is suitable for battery cell production systems.
Smart Images
Figure CN223361987U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to a device for testing the electrolyte wetting performance of a pole piece and a battery cell production system. Background Art
[0002] Existing battery cells are composed of positive electrodes, negative electrodes, separators, and electrolytes. The wettability of the electrolyte to the electrode sheets is very critical. On the one hand, it will affect the capacity, cycle, and rate performance of the battery cells. On the other hand, it will also affect the process time of injection, room temperature standing, high temperature standing and other processes.
[0003] Current evaluation methods typically use a wetting angle meter to measure the wetting angle and assess wetting performance. This method has the following issues: 1. It is expensive, requiring the purchase of a wetting angle meter and specialized training; 2. It is inefficient, requiring specialized personnel and complex testing procedures. Consequently, there is currently a lack of a simple, efficient, and accurate device for assessing electrolyte wetting performance on electrodes.
[0004] In view of this, the present utility model is proposed. Utility Model Content
[0005] The purpose of the utility model includes providing an electrolyte infiltration performance testing device for a pole piece and a battery cell production system.
[0006] The embodiment of the present utility model can be implemented as follows:
[0007] In the first aspect, the utility model provides an electrolyte infiltration performance testing device for an electrode, comprising a base plate, a bracket, an electrolyte tank, a detector and a signal processing device, wherein the bracket is fixedly arranged on the base plate, the electrolyte tank and the detector are both arranged on the bracket, the electrolyte tank is provided with an electrolyte dropper and a flow control valve, the flow control valve is provided on the electrolyte dropper, a electrode is provided on the base plate, the opening of the electrolyte dropper is located above the electrode for dripping electrolyte onto the electrode, the detector and the signal processing device are electrically connected, and the detector is configured to monitor and collect data signals of the diffusion area and diffusion time of the electrolyte on the electrode, and transmit the data signals to the signal processing device.
[0008] In an optional embodiment, the electrolyte tank and the corresponding electrode are a group of detection units, and 2-4 groups of the detection units are arranged on the bottom plate.
[0009] In an optional embodiment, the electrolyte in the electrolyte tank of each group of the multiple detection units is different or the electrode pieces are different.
[0010] In an optional embodiment, a pressure plate for fixing the pole piece is further provided on the bracket, and the number of the pressure plates is two and they are symmetrically pressed on both sides of the pole piece.
[0011] In an optional embodiment, a positioning groove for positioning the pole piece is provided on the bottom plate.
[0012] In an optional embodiment, the electrolyte dropper is further provided with a solenoid valve, and the solenoid valve is electrically connected to the signal processing device.
[0013] In an optional embodiment, a lifting assembly for adjusting the installation height of the electrolyte tank and the detector is provided on the bracket.
[0014] In an optional embodiment, the detector is a CCD visual tester.
[0015] In an optional embodiment, the signal processing device is a computer.
[0016] In a second aspect, the present invention provides a battery cell production system, comprising the electrolyte wetting performance testing device for a pole piece according to any one of the aforementioned embodiments.
[0017] The beneficial effects of the electrode electrolyte wettability testing device and battery cell production system provided by the embodiments of the utility model include:
[0018] The electrolyte wetting performance testing device provided by the utility model directly drips the electrolyte onto the electrode, then observes the diffusion area and diffusion time of the electrolyte on the electrode, and then uses the equation "diffusion area ÷ diffusion time = diffusion rate" to quickly calculate the electrode's wettability. The electrolyte wetting performance testing device provided by this embodiment has a simple overall structure and, compared to a wetting angle tester, has a low manufacturing cost and can efficiently and quickly test the electrode's wettability. The electrolyte wetting performance testing device for the electrode is simple to operate and easy to use, requiring no equipment operation training, which helps save time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 This is a schematic diagram of the structure of the electrolyte wetting performance testing device for the electrode provided in this embodiment.
[0021] Icon: 100 - Electrolyte wetting performance test device of electrode; 110 - Base plate; 111 - Electrode; 112 - Press plate; 120 - Bracket; 130 - Electrolyte tank; 131 - Electrolyte dropper; 132 - Flow control valve; 133 - Solenoid valve; 140 - Detector; 150 - Signal processing equipment. DETAILED DESCRIPTION
[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0023] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.
[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0025] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0026] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.
[0027] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.
[0028] Example
[0029] Please refer to Figure 1 The electrode electrolyte infiltration performance testing device 100 provided by the present invention is used to test the wettability of the electrode 111 and can compare the wettability of different electrode pieces 111.
[0030] Specifically, the electrolyte wetting performance testing device 100 of the electrode includes a base plate 110, a bracket 120, an electrolyte tank 130, a detector 140 and a signal processing device 150. The bracket 120 is fixedly arranged on the base plate 110, the electrolyte tank 130 and the detector 140 are both arranged on the bracket 120, the electrolyte tank 130 is provided with an electrolyte dropper 131 and a flow control valve 132, the flow control valve 132 is provided on the electrolyte dropper 131, and the electrode 111 is provided on the base plate 110. The opening of the electrolyte dropper 131 is located above the electrode 111 for dripping electrolyte onto the electrode 111. The detector 140 and the signal processing device 150 are electrically connected. The detector 140 is configured to monitor and collect data signals of the diffusion area and diffusion time of the electrolyte on the electrode 111, and transmit the data signals to the signal processing device 150.
[0031] In this embodiment, the electrolyte tank 130 is filled with electrolyte, and the electrolyte can be dripped onto the electrode 111 on the bottom plate 110 through the electrolyte dropper 131. The electrolyte will diffuse on the electrode 111. In this embodiment, the detector 140 is used to monitor the diffusion area and diffusion time of the electrolyte on the electrode 111, and the monitored data signal is transmitted to the signal processing device 150. The signal processing device 150 can record the diffusion area at different diffusion times, and then use the equation "diffusion area ÷ diffusion time = diffusion rate" to quickly calculate the wetting performance of the electrode 111.
[0032] The electrode electrolyte wetting performance testing device 100 provided in this embodiment has a simple overall structure, a low manufacturing cost compared to a wetting angle tester, and can efficiently and quickly detect the wetting performance of the electrode 111. The electrode electrolyte wetting performance testing device 100 is simple to operate and easy to use, does not require equipment operation training, and is conducive to saving time.
[0033] Furthermore, the electrolyte tank 130 and its corresponding electrode 111 form a group of detection units, and 2-4 groups of detection units are provided on the bottom plate 110. The electrolyte in each group of electrolyte tanks 130 in the multiple detection units is different or the electrode 111 is different. In this embodiment, by providing multiple groups of detection units, it is possible to quickly compare the wettability of different electrode 111 at the same time, and it is also possible to perform repetitive tests on the same electrode 111 using the same electrolyte, or to test the wettability of different electrolytes on the same electrode 111 using different electrolytes. This embodiment can achieve a variety of test conditions, which is convenient for operators to choose according to actual conditions.
[0034] Furthermore, in order to prevent the pole piece 111 from shaking or shifting when placed on the base plate 110, in this embodiment, the bracket 120 is further provided with a pressure plate 112 for fixing the pole piece 111. The pressure plates 112 are two and symmetrically pressed on both sides of the pole piece 111. The pressure plates 112 can fix the pole piece 111 and ensure the stability of the pole piece 111.
[0035] In addition, in order to ensure that each electrode 111 is placed exactly below the opening of the electrolyte dropper 131, in this embodiment, a positioning groove (not shown) for positioning the electrode 111 is provided on the bottom plate 110. The electrode 111 is placed in the positioning groove to achieve positioning of the electrode 111.
[0036] Furthermore, the electrolyte dropper 131 is also provided with a solenoid valve 133, which is electrically connected to the signal processing device 150. In this embodiment, by simultaneously configuring the solenoid valve 133 and the flow control valve 132 on the electrolyte dropper 131, the solenoid valve 133 can control the opening and closing of the electrolyte dropper 131, thereby achieving a large-scale adjustment of the flow rate of the electrolyte dropper 131, while the flow control valve 132 can adjust the electrolyte dropper 131 to discharge the electrolyte dropper drop by drop, thereby achieving a small-scale adjustment of the flow rate of the electrolyte dropper 131. Through the cooperation of the solenoid valve 133 and the flow control valve 132, the amount of electrolyte added to the electrolyte dropper 131 can be precisely controlled.
[0037] In some embodiments, the installation height of the electrolyte tank 130 and the detector 140 needs to be adjusted according to actual conditions. Therefore, in this embodiment, a lifting assembly (not shown) for adjusting the installation height of the electrolyte tank 130 and the detector 140 is provided on the bracket 120. There are many forms of lifting assemblies, including but not limited to the cooperation of a lead screw and a nut block, the cooperation of a slide groove and a slider, the cooperation of a cylinder and a slider, or the cooperation of a chain and a gear, etc. As long as it can achieve the lifting and lowering of the electrolyte tank 130 and the detector 140 on the bracket 120, it can be used as a lifting assembly of the present invention. It should also be noted that the electrolyte tank 130 and the detector 140 can be installed on the same bracket 120, or they can be installed on two independent brackets 120 respectively, and the lifting assembly for controlling the electrolyte tank 130 and the detector 140 can be one, or two independent lifting assemblies can be controlled separately, which is more flexible in operation.
[0038] In this embodiment, the detector 140 is a CCD visual tester, and the signal processing device 150 is a computer.
[0039] In addition, the present invention provides a battery cell production system including the above-mentioned electrode electrolyte wetting performance testing device 100. After testing the electrolyte wetting performance of the electrode 111, a suitable electrode 111 is selected to prepare the battery cell, thereby ensuring the capacity, cycle and rate performance of the battery cell.
[0040] Taking the electrode electrolyte infiltration performance testing device 100 provided with two sets of detection units as an example, the working principle of the electrode electrolyte infiltration performance testing device 100 provided in this embodiment is as follows:
[0041] By adding electrolyte into two electrolyte tanks 130, placing the electrode 111 on the base plate 110 and fixing it with a pressure plate 112, using a signal processing device 150 to control the opening of the two solenoid valves 133, and at the same time adjusting the flow control valve 132 to adjust the electrolyte dropper 131 to discharge the electrolyte drop by drop, the electrolyte drips onto the electrode 111, and the diffusion area and diffusion time of the electrolyte on the electrode 111 are monitored. The data is transmitted to the computer to record the diffusion area under different diffusion times, and the diffusion area ÷ diffusion time = diffusion rate is used, so that the wetting performance of different electrodes 111 can be quickly compared.
[0042] In summary, the electrolyte wetting performance testing device provided by the present invention directly drips the electrolyte onto the electrode 111, then observes the diffusion area and diffusion time of the electrolyte on the electrode 111, and then uses the equation "diffusion area ÷ diffusion time = diffusion rate" to quickly calculate the wetting performance of the electrode 111. The electrolyte wetting performance testing device 100 for the electrode provided in this embodiment has a simple overall structure and, compared to a wetting angle tester, has a low manufacturing cost and can efficiently and quickly detect the wetting performance of the electrode 111. The electrolyte wetting performance testing device 100 for the electrode is simple to operate and easy to use, and does not require equipment operation training, which helps save time.
[0043] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.
Claims
1. A device for testing the electrolyte wettability of a pole piece, characterized in that: It includes a base plate, a bracket, an electrolyte tank, a detector and a signal processing device, the bracket is fixedly arranged on the base plate, the electrolyte tank and the detector are both arranged on the bracket, the electrolyte tank is provided with an electrolyte dropper and a flow control valve, the flow control valve is provided on the electrolyte dropper, an electrode is provided on the base plate, the opening of the electrolyte dropper is located above the electrode for dripping electrolyte onto the electrode, the detector is electrically connected to the signal processing device, and the detector is configured to monitor and collect data signals of the diffusion area and diffusion time of the electrolyte on the electrode, and transmit the data signals to the signal processing device.
2. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The electrolyte tank and the corresponding electrode form a group of detection units, and 2-4 groups of the detection units are arranged on the bottom plate.
3. The electrode electrolyte wettability testing device according to claim 2, characterized in that: The electrolyte in each electrolyte tank of each group of the multiple detection units is different or the electrode pieces are different.
4. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The bracket is also provided with a pressing plate for fixing the pole piece, and the pressing plates are two and symmetrically pressed on both sides of the pole piece.
5. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The bottom plate is provided with a positioning groove for positioning the pole piece.
6. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The electrolyte dropper is also provided with a solenoid valve, which is electrically connected to the signal processing device.
7. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The bracket is provided with a lifting component for adjusting the installation height of the electrolyte tank and the detector.
8. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The detector is a CCD visual tester.
9. The electrode electrolyte wettability testing device according to claim 1, characterized in that: The signal processing device is a computer.
10. A battery cell production system, characterized in that: An electrolyte wetting performance testing device for a pole piece comprising the device described in any one of claims 1 to 9.