Drying test device and battery production equipment

Abstract

The utility model relates to a drying test device and battery production equipment, and the drying test device comprises a main body which is provided with a drying chamber and is configured to be capable of drying a pole piece in the drying chamber; the weight measuring assembly is arranged in the drying chamber and is provided with a bearing surface; the temperature detection assembly is arranged on the bearing surface and is used for detecting the real-time temperature of the surface of the pole piece; wherein the weight measuring assembly is configured to be capable of measuring the real-time weight of the pole piece, and a drying characteristic curve of the pole piece is obtained by combining the real-time temperature of the pole piece. The weight measuring assembly can obtain the real-time weight of the pole piece, and the temperature detection assembly can detect the real-time temperature of the surface of the pole piece, so that the drying characteristic curve of the pole piece can be quickly obtained according to the weight variation and the temperature variation of the pole piece within a certain time; therefore, the drying parameters and environment of the pole piece can be more accurately controlled according to the drying characteristic curve, and the drying test efficiency and drying quality of the pole piece are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a drying test device and battery production equipment. Background Technology

[0002] In the battery manufacturing process, the specific process of battery electrode manufacturing is as follows: First, the positive electrode active material, negative electrode active material, conductive agent, and binder are uniformly mixed to form a mixed slurry; then, the mixed slurry is coated on the current collector, and finally the mixed slurry coated on the current collector is dried.

[0003] The drying process of the electrode is usually carried out in an oven. In order to accurately control the parameters, it is often necessary to use a drying test device to conduct a drying test on the coated current collector to monitor the changes in parameters such as temperature and weight of the electrode.

[0004] However, the current drying test process for electrodes is inefficient, and the drying quality of the electrodes is poor, which affects the final performance of the electrodes. Utility Model Content

[0005] Therefore, it is necessary to provide a drying test device and battery production equipment to address the problems of low efficiency and poor drying quality of current electrode drying test processes, which affect the final performance of the electrodes.

[0006] In a first aspect, this application provides a drying test apparatus, including a main body, a weighing component, and a temperature detection component. The main body has a drying chamber and is configured to dry an electrode sheet in the drying chamber. The weighing component is disposed in the drying chamber and has a bearing surface for supporting the electrode sheet. The temperature detection component is disposed on the bearing surface and is used to detect the real-time temperature of the electrode sheet surface during the drying process. The weighing component is configured to measure the real-time weight of the electrode sheet during the drying process and obtain a drying characteristic curve of the electrode sheet by combining the real-time temperature of the electrode sheet.

[0007] Using the above structure, the drying characteristic curve of the electrode can be quickly obtained within a certain time period by combining the real-time weight and temperature of the electrode. In subsequent production processes, based on the drying characteristic curve, the oven temperature can be better adjusted, the oven structure designed, and the process speed and quality controlled at different locations. This effectively improves the drying efficiency and quality of the electrode.

[0008] In some embodiments, the weighing component is movably disposed relative to the drying chamber and has a closed position and an open position; when the weighing component is in the closed position, the bearing surface is housed in the drying chamber; when the weighing component is in the open position, at least a portion of the bearing surface is exposed outside the drying chamber.

[0009] With the above structure, on the one hand, the switching between the closed and open positions of the weighing component allows for quick replacement of the electrode sheets on the bearing surface, facilitating operation. On the other hand, when the weighing component is in the closed position, the electrode sheets undergo drying in a sealed drying chamber, effectively reducing heat loss during the drying process, allowing for better control of the drying temperature, and improving drying quality.

[0010] In some embodiments, one of the drying chamber wall and the weighing component is provided with a guide rail, and the other is provided with a slider. The slider slides in cooperation with the guide rail to switch the weighing component between a closed position and an open position.

[0011] By using guide rails and sliding parts, the weighing component and the drying chamber together form a drawer structure. The weighing component can be switched between the closed and open positions by pulling it out, which makes it easier to replace the electrode. When the weighing component is pushed into the drying chamber, the drying chamber can better form a sealed space, which is convenient for drying the electrode.

[0012] In some embodiments, the weighing component includes a weighing platform and a weighing balance connected to the bottom of the weighing platform, with a bearing surface formed on the side of the weighing platform away from the weighing balance, and the weighing balance is used to measure the real-time weight of the electrode.

[0013] With the above structure, when the electrode is placed on the bearing surface of the weighing platform, the weighing balance can measure the real-time weight of the electrode as the drying process proceeds. This allows for quick and accurate acquisition of the real-time weight of the electrode, which in turn enables the obtaining of the drying characteristic curve based on the real-time weight.

[0014] In some embodiments, the weighing assembly further includes a clamp movably disposed on the weighing platform. The clamp is used to press the electrode against the bearing surface, and the clamp has an clearance opening that corresponds to the area to be tested on the electrode.

[0015] The above structure allows the electrode to be set more stably on the bearing surface, and the clamp presses against the electrode. When hot air is blown onto the electrode during the drying process, the probability of the electrode shifting or even being blown away by the hot air is reduced, making the drying process smoother.

[0016] In some embodiments, the weighing assembly further includes a heat insulation pad disposed at the bottom of the weighing platform. The heat insulation pad at the bottom of the weighing platform reduces the impact of heat conduction from the weighing platform on the temperature rise of the electrode during drying, and reduces energy leakage within the drying chamber.

[0017] In some embodiments, the temperature detection assembly includes a contact temperature sensor disposed on the bearing surface for contacting the surface of the electrode and measuring the temperature.

[0018] By setting up a contact temperature sensor that contacts and measures the temperature of the electrode surface, the real-time temperature of the electrode can be detected during the drying process, so as to obtain the drying characteristic curve of the electrode by combining it with the real-time weight.

[0019] In some embodiments, the main body further includes an air supply component, a heating component, and a connecting pipe. The air outlet of the air supply component is connected to the heating component, and the connecting pipe is connected between the heating component and the drying chamber. The heating component is used to heat the airflow from the air supply component and send it into the drying chamber through the connecting pipe.

[0020] Therefore, the air supply component can supply air to the drying chamber, and at the same time, the heating component can heat the airflow, thereby blowing hot air into the drying chamber to dry the electrode.

[0021] In some embodiments, the heating assembly includes a heater and a control unit connected to each other, wherein the heater is used to heat the airflow and the control unit is used to control the heating temperature of the heater.

[0022] With the above structure, while heating the airflow to blow hot air into the drying chamber, the heating temperature can be regulated and feedback can be provided, thereby better controlling the heating conditions.

[0023] In some embodiments, the main body further includes an air distribution element, which has an inlet and an outlet. The inlet is connected to a connecting pipe, and the outlet is connected to a drying chamber. The size of the outlet is adjustable.

[0024] With the above structure, the size of the air distribution element can be flexibly adjusted according to the actual needs of different electrodes in the drying process, thereby regulating the required airflow environment and improving drying efficiency and quality.

[0025] In some embodiments, the main body is further provided with an exhaust port that communicates with the drying chamber and is used to communicate with an external circulation system.

[0026] With the above structure, on the one hand, the exhaust vent can adjust the exhaust speed according to the airflow conditions inside the drying chamber, thereby regulating the air volume inside the drying chamber. On the other hand, the exhaust vent can maintain a positive pressure state inside the drying chamber, reducing the impact of environmental pressure on the drying results.

[0027] Secondly, this application also provides a battery production apparatus, including the drying test device as described above, which is used to perform drying tests on the electrode sheets.

[0028] During the drying test, the aforementioned drying test device and battery production equipment can obtain the real-time weight of the electrode as the moisture in the electrode evaporates, and the temperature detection component can detect the real-time temperature of the electrode surface. Thus, based on the weight change and temperature change of the electrode over a certain period of time, the drying characteristic curve of the electrode can be quickly obtained. This allows for more accurate control of the drying parameters and environment of the electrode based on the drying characteristic curve, thereby improving the drying test efficiency and drying quality of the electrode. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a drying test apparatus according to one or more embodiments.

[0030] Figure 2 This is a schematic diagram of the structure of the weighing component in a drying test apparatus according to one or more embodiments.

[0031] Explanation of reference numerals in the attached drawings: 100, Drying test device; 10, Main body; 20, Weighing component; 30, Temperature detection component; 11, Air supply component; 12, Heating component; 13, Connecting pipe; 14, Electrode temperature display screen; 15, Wind speed display screen; 16, Air distribution component; 17, Observation window; 18, Exhaust vent; 21, Bearing surface; 22, Guide rail; 23, Weighing platform; 24, Lock; 25, Handle; 26, Clamp; 27, Heat insulation pad; 31, Contact temperature sensor; 121, Heating temperature display instrument; 261, Clearance opening. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0039] A battery cell is the smallest unit that makes up a battery. A battery cell typically includes a casing, a top cover, and electrode assemblies. The top cover is a sealing cap located at the opening of the casing. The top cover and the casing together enclose a cavity in which the electrode assemblies are placed.

[0040] The electrode assembly typically includes a stacked positive electrode, a separator, and a negative electrode. The positive electrode is formed by coating a current collector with a positive active material, and the negative electrode is formed by coating a current collector with a negative active material. It should be noted that the positive or negative active material is a slurry formed by mixing the positive and negative active materials with solvents and other materials. Therefore, after coating the slurry onto the current collector, a drying process is required to remove water and organic solvents from the slurry.

[0041] Specifically, the drying process of the coated current collector (hereinafter referred to as the electrode to be tested) usually includes the following two stages: the first is the solvent evaporation stage, in which the water and organic solvent in the mixed slurry on the current collector will gradually evaporate over time, so that the weight of the coated current collector gradually decreases, while the temperature does not gradually rise; the second is the temperature rise stage, which mainly occurs after the solvent evaporation stage. Compared with the solvent evaporation stage, the weight of the electrode to be tested no longer decreases significantly, but its temperature rises significantly.

[0042] Therefore, drying test devices are commonly used to perform drying tests on coated current collectors to monitor changes in parameters such as temperature and weight of the electrode. However, during the current drying test process, due to factors such as the test environment, it is impossible to accurately monitor related parameters such as electrode temperature and solvent evaporation rate, thus affecting the drying test efficiency and drying quality of the electrode.

[0043] Based on the above considerations, in order to solve the problems of low efficiency and poor drying quality of current electrode drying testing processes, which affect the final performance of the electrode, one or more embodiments of this application provide a drying testing device. During the drying test, as the moisture in the electrode evaporates, the weighing component can obtain the real-time weight of the electrode, and the temperature detection component can detect the real-time temperature of the electrode surface. Thus, based on the weight change and temperature change of the electrode over a certain period of time, the drying characteristic curve of the electrode can be quickly obtained, so as to more accurately control the drying parameters and environment of the electrode according to the drying characteristic curve, thereby improving the drying testing efficiency and drying quality of the electrode.

[0044] Please refer to the following: Figure 1 and Figure 2One embodiment of this application provides a drying test apparatus 100, including a main body 10, a weighing component 20, and a temperature detection component 30. The main body 10 has a drying chamber (not shown) and is configured to dry electrodes within the drying chamber. The weighing component 20 is disposed within the drying chamber and has a bearing surface 21 for supporting the electrodes. The temperature detection component 30 is disposed on the bearing surface 21 and is used to detect the real-time temperature of the electrode surface during the drying process. The weighing component 20 is configured to measure the real-time weight of the electrodes during the drying process and, in conjunction with the real-time temperature of the electrodes, obtain a drying characteristic curve of the electrodes.

[0045] It should be noted that the drying test device 100 refers to a device capable of drying the electrode sheet and monitoring its state and various parameters during the drying process. After conducting a drying test on the electrode sheet using the drying test device 100, conditions such as air speed and temperature can be adjusted during production based on the test results, thereby better controlling the drying conditions of the electrode sheet and improving its drying efficiency and quality.

[0046] The main body 10 refers to the main body 10 portion of the drying test apparatus 100, which has a drying chamber inside. The drying chamber can accommodate the electrode to be tested, so that the main body 10 can perform drying treatment on the electrode inside the drying chamber. The drying treatment can be, but is not limited to, evaporating the solvent and other moisture in the slurry coated on the electrode by supplying hot air to the electrode, thereby achieving the drying of the electrode. That is, the electrode is placed in the drying chamber, and the main body 10 can supply hot air into the drying chamber to achieve the drying treatment of the electrode.

[0047] The weighing component 20 refers to the result of measuring the real-time weight of the electrode. As the drying process proceeds, the solvent and other moisture in the slurry coated on the electrode gradually evaporate, causing the weight of the electrode to change continuously. The change in the real-time weight of the electrode reflects the evaporation rate of the solvent and other moisture in the electrode.

[0048] Furthermore, the weighing component 20 is disposed within the drying chamber, and the weighing component 20 has a bearing surface 21. When the electrode is housed within the drying chamber, the electrode can be placed on the bearing surface 21. In this way, while achieving the bearing of the electrode, it is more convenient to measure the real-time weight of the electrode.

[0049] The temperature detection component 30 refers to a structure capable of detecting the real-time temperature of the electrode surface during the drying process. During the drying process, hot air is blown onto the electrode or the electrode is heated to evaporate solvents and other moisture, causing the electrode temperature to gradually increase.

[0050] Within a certain timeframe, by combining the real-time weight and temperature of the electrode, its drying characteristic curve can be quickly obtained. In subsequent production processes, based on this curve, the oven temperature can be better adjusted, the oven structure designed, and the process speed and quality controlled at different points. This effectively improves the drying efficiency and quality of the electrode.

[0051] In some embodiments, the weighing assembly 20 is movably disposed relative to the drying chamber and has a closed position and an open position. When the weighing assembly 20 is in the closed position, the bearing surface 21 is housed within the drying chamber. When the weighing assembly 20 is in the open position, at least a portion of the bearing surface 21 is exposed outside the drying chamber.

[0052] Specifically, the weighing component 20 is movably disposed in the drying chamber, and the weighing component 20 has a closed position and an open position during movement. When the weighing component 20 is in the closed position, the weighing component 20 is located in the drying chamber, that is, the bearing surface 21 is housed in the drying chamber, and at this time, the electrode plate placed on the bearing surface 21 is also housed in the drying chamber.

[0053] When the weighing component 20 is in the open position, at least a portion of the weighing component 20 moves outside the drying chamber. At this time, at least a portion of the bearing surface 21 is exposed outside the drying chamber, which facilitates the placement of new electrodes to be tested on the bearing surface 21.

[0054] Specifically, in actual operation, the weighing component 20 is initially in the closed position. The weighing component 20 is moved to the open position, and the electrode to be tested is fixed on the bearing surface 21. Then the weighing component 20 is moved to the closed position. At this time, the electrode and the bearing surface 21 are stored together in the drying chamber, so that the electrode can be dried in the sealed drying chamber.

[0055] With the above structure, on the one hand, the switching between the closed and open positions of the weighing component 20 allows for quick replacement of the electrode sheets on the bearing surface 21, facilitating operation. On the other hand, when the weighing component 20 is in the closed position, the electrode sheets undergo drying in a sealed drying chamber, which effectively reduces heat loss during the drying process, facilitates better control of the drying temperature, and improves the drying quality.

[0056] In some embodiments, one of the drying chamber wall and the weighing component 20 is provided with a guide rail 22, and the other is provided with a slider (not shown in the figure). The slider is slidably engaged with the guide rail 22 to switch the weighing component 20 between a closed position and an open position.

[0057] Understandably, the above embodiments specifically include the following two implementation methods:

[0058] In the first method, a guide rail 22 is installed on the wall of the drying chamber. The drying chamber can be configured with an opening on one side, and the guide rail 22 extends along the opening direction. Simultaneously, a slider is installed on the weighing component 20. The slider can be, but is not limited to, a slider that slides into the guide rail 22. The slider is engaged with the guide rail 22, and the slider can drive the weighing component 20 to move along the extension direction of the guide rail 22, thereby enabling the weighing component 20 to be pulled out of or pushed into the drying chamber, that is, to switch the weighing component 20 between a closed position and an open position.

[0059] The second method involves setting a guide rail 22 on the weighing component 20 and setting a sliding member on the wall of the drying chamber that slides in cooperation with the guide rail 22. The sliding member is snapped into the guide rail 22, which can also realize the extraction and insertion of the weighing component 20, that is, realize the switching of the weighing component 20 between the closed position and the open position.

[0060] Understandably, the guide rail 22 and the sliding parts enable the weighing component 20 and the drying chamber to form a drawer structure. By pulling out the drawer, the weighing component 20 can be switched between the closed and open positions, making it easier to replace the electrode. Furthermore, when the weighing component 20 is pushed into the drying chamber, the drying chamber can better form a sealed space, which is convenient for drying the electrode.

[0061] Furthermore, it should be noted that in some other embodiments, the weighing component 20 can also switch between the closed and open positions in other ways, such as by rotation. That is, the weighing component 20 rotates around a pivot, and can switch between the closed and open positions during the rotation process, which will not be elaborated here.

[0062] In some embodiments, the weighing assembly 20 includes a weighing platform 23 and a weighing balance (not shown) connected to the bottom of the weighing platform 23. The bearing surface 21 is formed on the side of the weighing platform 23 away from the weighing balance. The weighing balance is used to measure the real-time weight of the electrode.

[0063] Specifically, the weighing platform 23 can support the electrode sheet, that is, the upper surface of the weighing platform 23 is formed as the bearing surface 21, and the electrode sheet is placed on the bearing surface 21. At the same time, the weighing balance is a high-precision balance, which is set at the bottom of the weighing platform 23. When the electrode sheet is placed on the weighing platform 23, the weighing balance can weigh the electrode sheet.

[0064] Furthermore, a weight display can be installed on the outer surface of the weighing component 20. The weight display can show the weighing result of the weighing balance in real time, thereby enabling better monitoring of the real-time weight of the electrode.

[0065] The weighing assembly 20 also includes a locking buckle 24. When the weighing assembly 20 is in the closed position, it can be locked by the locking buckle 24 so that the weighing assembly 20 can be more stably in the closed position, so that the electrode can be stably dried in the drying chamber.

[0066] In addition, a handle 25 can be provided on the outer surface of the weighing component 20. The handle 25 can be used to pull the weighing component 20 more conveniently, so that it can be quickly switched between the closed position and the open position, making it easy to operate.

[0067] With the above structure, when the electrode is placed on the bearing surface 21 of the weighing platform 23, the weighing balance can measure the real-time weight of the electrode as the drying process proceeds, and can quickly and accurately obtain the real-time weight of the electrode so as to obtain the drying characteristic curve based on the real-time weight.

[0068] In some embodiments, the weighing assembly 20 further includes a clamp 26 movably disposed on the weighing platform 23. The clamp 26 is used to press the electrode against the bearing surface 21, and the clamp 26 has an avoidance opening 261, which is correspondingly disposed to the area to be tested on the electrode.

[0069] Specifically, when the electrode is placed on the bearing surface 21, the clamp 26 can fix and press the electrode, allowing it to adhere more stably to the bearing surface 21. The clamp 26 can be a flat plate with a clearance opening 261 in the middle. When the clamp 26 presses against the electrode, it contacts the peripheral area of ​​the electrode, for example, the uncoated area of ​​the electrode, while the clearance opening 261 corresponds to the coated area on the electrode, i.e., the area to be tested. This allows the area to be tested to be exposed through the clearance opening 261, enabling hot air to be better delivered to the tested area for drying.

[0070] Furthermore, the clamp 26 can be movably mounted on the weighing platform 23 via a rotating shaft. That is, a rotating shaft is provided on the weighing platform 23, and the clamp 26 rotates around the rotating shaft. When the clamp 26 is lifted by rotation, the electrode is placed on the bearing surface 21. Then the clamp 26 is lowered by rotation so that it presses against the electrode to fix the electrode.

[0071] Of course, the clamp 26 can also be movably set on the weighing platform 23 in other ways, such as being detachably set on the weighing platform 23 by bolt connection, or being set on the weighing platform 23 by snap-fit. In the same way, the electrode can be placed or removed between the clamp 26 and the bearing surface 21. This will not be elaborated here.

[0072] The above structure allows the electrode to be set more stably on the bearing surface 21, and the clamp 26 presses against the electrode. When hot air is blown onto the electrode during the drying process, the probability of the electrode shifting or even being blown away by the hot air is reduced, making the drying process smoother.

[0073] In some embodiments, the weighing assembly 20 further includes a heat insulation pad 27 disposed at the bottom of the weighing platform 23.

[0074] Specifically, when the weighing assembly 20 is in the closed position, the weighing assembly 20 and the drying chamber together form a sealed space, at which time the electrode sheets in the drying chamber are dried. At the same time, the heat insulation pad 27 at the bottom of the weighing platform 23 can reduce the impact of heat conduction from the weighing platform 23 on the temperature rise of the electrode sheets during the drying process, and reduce energy leakage in the drying chamber.

[0075] In some embodiments, the temperature detection assembly 30 includes a contact temperature sensor 31, which is disposed on the bearing surface 21 and is used to contact the surface of the electrode and measure the temperature.

[0076] When the electrode is placed on the bearing surface 21, the probe of the contact temperature sensor 31 contacts the surface of the electrode. At the same time, the clamp 26 further presses the electrode against the bearing surface 21, making the contact between the electrode and the contact temperature sensor 31 tighter. This improves the accuracy and stability of the detection results.

[0077] By setting a contact temperature sensor 31 to contact the surface of the electrode and measure the temperature, the real-time temperature of the electrode can be detected during the drying process, so as to obtain the drying characteristic curve of the electrode by combining it with the real-time weight.

[0078] In some embodiments, the main body 10 further includes an air supply assembly 11, a heating assembly 12, and a connecting pipe 13. The air outlet of the air supply assembly 11 is connected to the heating assembly 12, and the connecting pipe 13 is connected between the heating assembly 12 and the drying chamber. The heating assembly 12 is used to heat the airflow from the air supply assembly 11 and send it into the drying chamber through the connecting pipe 13.

[0079] Specifically, the air supply assembly 11 can be, but is not limited to, a blower. The blower can blow air under the drive of a motor and blow it out through the air outlet into the heating assembly 12. The heating assembly 12 heats the air and then blows the heated air into the drying chamber through the connecting pipe 13 to dry the electrode sheet with hot air.

[0080] Furthermore, an electrode temperature display screen 14 can be provided on the main body 10. The electrode temperature display screen 14 can provide real-time feedback on the real-time temperature of the electrode surface detected by the contact temperature sensor 31, so as to facilitate regulation.

[0081] In addition, a wind speed display screen 15 can be installed on the main body 10, and a wind speed detector can be installed at the air inlet of the drying chamber. The wind speed detector can detect the wind speed blown into the drying chamber and display the detection result on the wind speed display screen 15. In this way, the wind speed of the hot air can be flexibly adjusted according to the drying status of the electrode, thereby controlling the drying result.

[0082] Thus, the air supply assembly 11 can supply air to the drying chamber, while the heating assembly 12 can heat the airflow, thereby blowing hot air into the drying chamber to dry the electrode sheet.

[0083] In some embodiments, the heating assembly 12 includes a heater (not shown) and a control unit connected to each other, the heater being used to heat the airflow and the control unit being used to control the heating temperature of the heater.

[0084] Specifically, the heating assembly 12 may also include a housing, in which a heater is disposed. The housing is connected between the air outlet of the air supply assembly 11 and the connecting pipe 13. Airflow enters the housing from the air outlet, the heater heats the airflow, and the heated airflow can be sent into the drying chamber through the connecting pipe 13.

[0085] The control unit may include a heating temperature display 121, which is mounted on the housing and can regulate and display the heating temperature, thereby providing better feedback on the heating status.

[0086] With the above structure, while heating the airflow to blow hot air into the drying chamber, the heating temperature can be regulated and feedback can be provided, thereby better controlling the heating conditions.

[0087] In some embodiments, the main body 10 further includes an air distribution element 16, which has an inlet and an outlet. The inlet is connected to the connecting pipe 13, and the outlet is connected to the drying chamber. The size of the outlet is adjustable.

[0088] Specifically, the air distribution element 16 can be, but is not limited to, a nozzle. The nozzle has an inlet and an outlet. The inlet is connected to the end of the connecting pipe 13 away from the heating assembly 12, and the outlet is connected to the drying chamber. The outlet of the nozzle is larger than the inlet, that is, the airflow enters the nozzle from the smaller inlet and then blows out from the larger outlet, which can better achieve airflow diffusion and make the airflow more evenly blown to the surface of the electrode.

[0089] Furthermore, the size of the nozzle outlet is adjustable. This can be achieved by replacing the nozzle with a different size, or by making the nozzle outlet a retractable structure.

[0090] Of course, the inlet of the nozzle can also be set to be adjustable in size to better adapt to the wind field environment requirements of different electrodes.

[0091] With the above structure, the size of the uniform air distribution element 16 can be flexibly adjusted according to the actual needs of different electrodes in the drying process, thereby adjusting the required airflow environment and improving drying efficiency and drying quality.

[0092] In addition, the main body 10 is also provided with an observation window 17, which can facilitate the observation of the drying status inside the drying chamber, and can also be opened to replace the air distribution component 16.

[0093] In some embodiments, the main body 10 is also provided with an exhaust port 18 that communicates with the drying chamber, and the exhaust port 18 is used to communicate with an external circulation system.

[0094] Specifically, the exhaust vent 18 can be connected to an external circulation system to collect the exhaust gas in the drying chamber into the external circulation system, thereby achieving air return circulation.

[0095] With the above structure, on the one hand, the exhaust vent 18 can adjust the exhaust speed according to the airflow conditions inside the drying chamber, thereby regulating the air volume inside the drying chamber. On the other hand, the exhaust vent 18 can maintain a positive pressure state inside the drying chamber, reducing the impact of environmental pressure on the drying results.

[0096] Based on the same concept as the structure described above, this application also provides a battery production apparatus, including a drying test device 100 as described above, which is used to perform drying tests on the electrode sheets.

[0097] According to one or more embodiments, when performing a drying test on the electrode, the weighing platform 23 is first pulled out to the open position, the electrode is placed on the bearing surface 21, and then the clamp 26 is pressed against the electrode so that the electrode can better fit with the contact temperature sensor 31 on the bearing surface 21, which facilitates more accurate detection of the real-time temperature of the electrode during the drying process.

[0098] Meanwhile, the electrode is placed on the bearing surface 21, and the weighing balance at the bottom of the weighing platform 23 can measure the real-time weight of the electrode.

[0099] After the electrode is placed on the bearing surface 21, the weighing platform 23 is pushed into the drying chamber and placed in the closed position. The blower is turned on to blow airflow into the heating assembly 12. The heater heats the airflow to form hot air, which is then blown onto the electrode in the drying chamber to achieve the drying process of the electrode.

[0100] In the above structure, the weighing component 20 can be switched between the closed and open positions by pulling it out, making it easier and faster to replace the electrode to be tested. In addition, the airflow environment inside the drying chamber can be adjusted by changing the air nozzles of different sizes.

[0101] Thus, by setting up a pull-out weighing platform 23, a uniform air distribution component 16, a blower, a heating component 12, and a drying chamber, the drying process environment during electrode production can be better simulated. This allows for better control of parameters such as heating temperature, wind speed, and electrode evaporation rate during the drying test, resulting in a more accurate drying characteristic curve for the electrode. This facilitates improved drying efficiency and quality of the electrode during production.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A drying test apparatus, characterized in that, include: The main body has a drying chamber and is configured to dry the electrode sheets in the drying chamber; The weighing assembly is disposed within the drying chamber and has a bearing surface for supporting the electrode sheet; and A temperature detection component is disposed on the bearing surface and is used to detect the real-time temperature of the electrode surface during the drying process; The weighing component is configured to measure the real-time weight of the electrode during the drying process and obtain the drying characteristic curve of the electrode by combining the real-time temperature of the electrode.

2. The drying test apparatus according to claim 1, characterized in that, The weighing component is movably disposed relative to the drying chamber and has a closed position and an open position; When the weighing component is in the closed position, the bearing surface is housed in the drying chamber; When the weighing component is in the open position, at least a portion of the bearing surface is exposed outside the drying chamber.

3. The drying test apparatus according to claim 2, characterized in that, The drying chamber wall and the weighing component are provided with a guide rail and a sliding component, respectively. The sliding component slides with the guide rail to allow the weighing component to switch between the closed position and the open position.

4. The drying test apparatus according to any one of claims 1-3, characterized in that, The weighing component includes a weighing platform and a weighing balance connected to the bottom of the weighing platform. The bearing surface is formed on the side of the weighing platform away from the weighing balance. The weighing balance is used to measure the real-time weight of the electrode.

5. The drying test apparatus according to claim 4, characterized in that, The weighing assembly also includes a clamp movably mounted on the weighing platform. The clamp is used to press the electrode against the bearing surface, and the clamp has an clearance opening that corresponds to the area to be tested on the electrode.

6. The drying test apparatus according to claim 4, characterized in that, The weighing assembly also includes a heat insulation pad, which is disposed at the bottom of the weighing platform.

7. The drying test apparatus according to claim 1, characterized in that, The temperature detection component includes a contact temperature sensor, which is disposed on the bearing surface and is used to contact the surface of the electrode and measure the temperature.

8. The drying test apparatus according to claim 1, characterized in that, The main body also includes an air supply component, a heating component, and a connecting pipe. The air outlet of the air supply component is connected to the heating component, and the connecting pipe is connected between the heating component and the drying chamber. The heating component is used to heat the airflow from the air supply component and send it into the drying chamber through the connecting pipe.

9. The drying test apparatus according to claim 8, characterized in that, The heating assembly includes a heater and a control unit connected to each other. The heater is used to heat the airflow, and the control unit is used to control the heating temperature of the heater.

10. The drying test apparatus according to claim 8, characterized in that, The main body also includes an air distribution component, which has an inlet and an outlet. The inlet is connected to the connecting pipe, and the outlet is connected to the drying chamber. The size of the outlet is adjustable.

11. The drying test apparatus according to claim 1, characterized in that, The main body is also provided with an exhaust port that communicates with the drying chamber, and the exhaust port is used to communicate with an external circulation system.

12. A battery manufacturing apparatus, characterized in that, Includes the drying test apparatus as described in any one of claims 1-11, the drying test apparatus being used to perform a drying test on an electrode sheet.

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