A drying device for power battery structural adhesive

Abstract

This utility model discloses a drying device for structural adhesive in power batteries, belonging to the technical field of drying equipment. The drying device includes a drying chamber and an air distribution and circulation assembly. The drying chamber is equipped with a closable door, an air supply vent, and an air return vent. A material rack is installed inside the drying chamber for placing power batteries. The air distribution and circulation assembly includes an air-source heat pump and multiple spaced-apart air distribution ducts. These ducts are horizontally spaced along the inner wall of the drying chamber, and each duct has multiple ventilation openings. The air outlet of the air-source heat pump is sequentially connected to the air supply vent and each air distribution duct, while the air inlet of the air-source heat pump is connected to the air return vent. This utility model provides a drying device for structural adhesive in power batteries that not only effectively reduces energy consumption but also achieves efficient, low-temperature heating of air, preventing fire accidents and ensuring uniform temperature within the drying chamber.

Description

Technical Field

[0001] This utility model belongs to the technical field of drying equipment, specifically relating to a drying device for structural adhesives used in power batteries. Background Technology

[0002] With the rapid development of the global new energy vehicle industry, the manufacturing process of power batteries, as core components, is becoming increasingly demanding. In the manufacturing process of new energy power battery packs, high-strength structural adhesives are widely used for bonding and fixing cells, modules, and housings. The curing quality of these adhesives directly determines the overall structural strength, seismic performance, and service life of the battery pack. Furthermore, the curing quality of the structural adhesive directly affects the overall structural strength, sealing, and safety of the battery pack. Drying and curing is a crucial step in the structural adhesive bonding process, ensuring that the adhesive undergoes a full cross-linking reaction to achieve the designed mechanical properties.

[0003] Currently, existing drying equipment mainly uses resistance electric heaters as the heat source to heat the circulating air, thereby drying and curing the structural adhesive in the power battery pack. However, resistance electric heaters consume a lot of energy, have extremely high surface temperatures, and are highly impactful, which not only easily ignites materials or the equipment itself, causing fire accidents, but also makes it difficult to ensure the uniformity of temperature in the drying chamber, resulting in inconsistent curing of the structural adhesive and internal stress generated inside the power battery. Utility Model Content

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a drying device for structural adhesive of power battery. Its purpose is to not only effectively reduce energy consumption, but also achieve efficient and low-temperature heating of air to avoid fire accidents, and ensure uniform temperature in the drying chamber to avoid the problem of internal stress in the power battery caused by inconsistent curing degree of structural adhesive in different locations.

[0005] To achieve the above objectives, this utility model provides a drying device for structural adhesives in power batteries, the drying device comprising a drying chamber and a uniform air circulation component; The drying chamber is equipped with a closable door, an air inlet, and an air return outlet. A material rack is installed inside the drying chamber for placing the power battery. The air distribution circulation component includes an air source heat pump and multiple spaced air distribution ducts. The air source heat pump is located outside the drying chamber. The multiple air distribution ducts are horizontally spaced on the inner wall of the drying chamber. Each air distribution duct is provided with multiple vents spaced along the axial direction. The air outlet of the air source heat pump is connected to the air supply outlet and each air distribution duct in sequence. The air inlet of the air source heat pump is connected to the air return outlet.

[0006] Optionally, the air distribution circulation assembly further includes a supply air static pressure box, the air inlet of which is connected to the air outlet of the air source heat pump, and the air outlet of which is connected to the supply air outlet.

[0007] Optionally, the air circulation assembly further includes a plurality of turbulence fans, which are spaced apart in the drying chamber and located at the top of the drying chamber.

[0008] Optionally, the drying chamber is equipped with multiple temperature and humidity sensors arranged at intervals.

[0009] Optionally, the bottom of the drying chamber is provided with multiple limiting strips, which together form a limiting space. The material rack is movably arranged within the limiting space, and the limiting space is connected to the opening corresponding to the door of the drying chamber to allow the material rack to enter and exit.

[0010] Optionally, the material rack is detachably equipped with a battery pack placement fixture, which is used to clamp and position the corresponding power battery.

[0011] Optionally, the bottom of the battery pack placement fixture has a support plate with a plurality of spaced positioning holes, and the platform of the material rack has a plurality of spaced positioning pins, each of which is inserted into a corresponding positioning hole.

[0012] Optionally, the material rack is provided with a foldable handle for pushing the material rack to move.

[0013] Optionally, the temperature inside the drying chamber is 35-65°C.

[0014] Optionally, the air supply outlet and the air distribution duct are both located at the bottom of the drying chamber, and the return air outlet is located at the top of the drying chamber.

[0015] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include: In the drying equipment for structural adhesive in power batteries provided in this embodiment of the invention, when drying and curing the structural adhesive in the power battery, the power battery is first transferred through the chamber door, thereby placing the power battery onto the material rack. Then, the chamber door is closed, and the drying chamber is in a sealed state.

[0017] Next, the air source heat pump is activated. This heat pump absorbs low-grade heat energy from the ambient air and converts it into high-grade heat energy suitable for drying. This not only effectively reduces energy consumption but also achieves efficient, low-temperature heating of the air. The hot air at the outlet is uniformly heated and kept at a low temperature, effectively preventing fire accidents. The hot air discharged from the air source heat pump outlet flows through the air supply vents and distribution ducts, ultimately exiting through multiple horizontally spaced ventilation openings. This forms a uniform airflow layer, stably and evenly delivering the hot air into the drying chamber, ensuring uniform temperature throughout the drying chamber and preventing internal stress caused by inconsistent curing of the structural adhesive at different locations. Simultaneously, after heating the power battery, the residual hot air flows back to the air source heat pump through the return air vent, is reheated, and then circulates, thus achieving heat recovery and improving energy utilization efficiency.

[0018] In other words, the drying equipment for structural adhesive of power batteries provided by this utility model embodiment can not only effectively reduce energy consumption, but also achieve efficient and low-temperature heating of air to avoid fire accidents. It can also ensure uniform temperature in the drying chamber and avoid the problem of internal stress in the power battery caused by inconsistent curing degree of structural adhesive at different locations. Attached Figure Description

[0019] Figure 1 This is a top view of a drying device for structural adhesive in power batteries provided in an embodiment of this utility model; Figure 2 This is a cross-sectional view of a drying device for structural adhesive in power batteries provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the arrangement of the temperature and humidity sensor provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the material rack cart provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the battery pack placement fixture provided in an embodiment of the present invention.

[0020] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Drying chamber; 11. Chamber door; 12. Air inlet; 13. Air outlet; 14. Material rack; 141. Handle; 142. Casters; 143. Directional casters; 15. Limiting strip; 16. Battery pack placement fixture; 161. Positioning hole; 2. Air source heat pump; 3. Air distribution duct; 31. Ventilation outlet; 4. Turbulence fan; 5. Temperature and humidity sensor; 6. Control module. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0026] Example: Figure 1 This is a top view of a drying device for structural adhesive in power batteries, provided in an embodiment of this utility model. Figure 2 This is a cross-sectional view of a drying device for structural adhesive in power batteries provided in an embodiment of this utility model, combined with... Figure 1 and Figure 2 As shown, the drying equipment includes a drying chamber 1 and an air circulation assembly.

[0027] The drying chamber 1 is equipped with a closable door 11, an air inlet 12 and an air return outlet 13. The drying chamber 1 is equipped with a material rack 14, which is used to place the power battery.

[0028] The air distribution circulation component includes an air source heat pump 2 and multiple spaced air distribution ducts 3. The air source heat pump 2 is located outside the drying chamber 1. The multiple air distribution ducts 3 are horizontally spaced on the inner wall of the drying chamber 1. Each air distribution duct 3 is provided with multiple vents 31 spaced along the axial direction. The air outlet of the air source heat pump 2 is connected to the air supply outlet 12 and each air distribution duct 3 in sequence. The air inlet of the air source heat pump 2 is connected to the return air outlet 13.

[0029] In the drying equipment for structural adhesive in power batteries provided in this embodiment of the present invention, when drying and curing the structural adhesive in the power battery, the power battery is first transferred through the chamber door 11, thereby placing the power battery onto the material rack 14. Then, the chamber door 11 is closed, at which point the drying chamber 1 is in a sealed state.

[0030] Next, the air source heat pump 2 is activated. The air source heat pump 2 absorbs low-grade heat energy from the ambient air and converts it into high-grade heat energy suitable for drying. This not only effectively reduces energy consumption but also achieves efficient, low-temperature heating of the air. The hot air at its outlet has a uniform and low temperature, effectively preventing fire accidents. The hot air discharged from the air source heat pump 2's outlet flows through the air supply vent 12 and the air distribution duct 3, ultimately exiting through multiple horizontally spaced ventilation openings 31. This hot air forms a uniform airflow layer, stably and evenly delivered into the drying chamber 1, ensuring uniform temperature throughout the chamber and preventing internal stress caused by inconsistent curing of the structural adhesive at different locations. Simultaneously, after heating the power battery, the residual hot air flows back to the air source heat pump 2 through the return air vent 13, is reheated, and then circulates, thus achieving heat recovery and improving energy utilization efficiency.

[0031] In other words, the drying equipment for structural adhesive of power battery provided by this utility model embodiment can not only effectively reduce energy consumption, but also achieve efficient and low-temperature heating of air to avoid fire accidents. It can also ensure uniform temperature in the drying chamber 1 and avoid the problem of internal stress in the power battery caused by inconsistent curing degree of structural adhesive at different locations.

[0032] It is easy to understand that the air source heat pump 2 includes a refrigerant circuit consisting of a compressor, an evaporator, a condenser, and a throttling device. The condenser is used as a heater. The above structures are all conventional technical means in this field and will not be described in detail here.

[0033] In this embodiment, the air supply outlet 12 and the air distribution duct 3 are both located at the bottom of the drying chamber 1, and the return air outlet 13 is located at the top of the drying chamber 1. At this time, the hot air flows from bottom to top, thereby increasing the residence time and drying range of the hot air in the drying chamber 1, and thus ensuring the full drying of the structural adhesive. There are two air distribution ducts 3, which are symmetrically arranged at the bottom of the inner wall of the drying chamber 1.

[0034] To increase the efficiency of hot air circulation, fans are installed in the air supply outlet 12 and the return air outlet 13 respectively.

[0035] In addition, the air circulation assembly also includes a power supply static pressure box (not shown in the figure). The air inlet of the power supply static pressure box is connected to the air outlet of the air source heat pump 2, and the air outlet of the power supply static pressure box is connected to the air outlet 12. The power supply static pressure box can regulate the pressure and reduce the noise of the hot air output by the air source heat pump 2, and control the airflow stability of the hot air entering the drying chamber 1.

[0036] In addition, the air circulation assembly also includes multiple turbulence fans 4, which are spaced apart in the drying chamber 1 and located at the top of the drying chamber 1.

[0037] It is easy to understand that at the top of the drying chamber 1, multiple turbulence fans 4 are used to powerfully agitate the air inside the chamber, especially targeting the space in the lower part of the material rack 14, effectively breaking the temperature stratification caused by the natural rising effect of hot air, and ensuring that the temperature gradient from top to bottom is minimized.

[0038] For example, the number of turbulence fans 4 is 4.

[0039] Figure 3 This is a schematic diagram of the arrangement of the temperature and humidity sensors provided in an embodiment of this utility model, as shown below. Figure 3 As shown, multiple temperature and humidity sensors 5 are arranged at intervals inside the drying chamber 1. These sensors 5 can detect the temperature and humidity at various locations within the drying chamber 1, ensuring consistent temperature and humidity inside the drying chamber 1.

[0040] Specifically, in this embodiment, the drying equipment also includes a control module 6, which comprises a controller and a touchscreen. The touchscreen is used to input control commands. An automatic start / stop dehumidification valve and a humidification module are installed in the hot air circulation pipeline. The controller is electrically connected to the air source heat pump 2, the temperature and humidity sensor 5, the automatic start / stop dehumidification valve, and the humidification module, thereby achieving automated closed-loop control of the temperature and humidity inside the drying chamber 1, ensuring that the temperature and humidity are within a reasonable range. Furthermore, the controller can also achieve multi-stage process control, such as target temperature and humidity values ​​and times for multiple stages including heating, heat preservation, and cooling. Moreover, the air source heat pump 2 can also achieve frequency conversion control.

[0041] For example, the temperature inside the drying chamber 1 is 35-65°C, which meets the requirements for drying structural adhesives.

[0042] See also Figure 1 and Figure 2 The bottom of the drying chamber 1 is equipped with multiple limiting strips 15, which together form a limiting space. The material rack 14 can be movably arranged within the limiting space, and the limiting space is connected to the corresponding opening of the upper chamber door 11 of the drying chamber 1 to allow the material rack 14 to enter and exit. The limiting strips 15 limit the material rack 14, ensuring that it is positioned in a suitable area. The material rack 14 can then easily enter the limiting space through the chamber door 11 for drying.

[0043] For example, there are four limiting spaces and four door 11s, which are separated from each other. Each limiting space corresponds to one door 11, thereby enabling loading and unloading from the corresponding door 11.

[0044] Figure 4 This is a schematic diagram of the structure of the material rack cart provided in an embodiment of this utility model, as shown below. Figure 4As shown, a battery pack placement fixture 16 is detachably mounted on the material rack 14. The battery pack placement fixture 16 is used to clamp and position the corresponding power battery. The battery pack placement fixture 16 serves to position the power battery, preventing the material rack 14 from moving or the power battery from falling off or moving relative to the material rack 14 during the drying and curing process.

[0045] Figure 5 This is a schematic diagram of the battery pack placement fixture provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the bottom of the battery pack placement fixture 16 has a support plate with multiple spaced positioning holes 161. The platform of the material rack 14 has multiple spaced positioning pins, each of which is inserted into a corresponding positioning hole 161. Thus, the battery pack placement fixture 16 can be easily installed and removed from the material rack 14 through the insertion and cooperation of the positioning pins and positioning holes 161. The battery pack placement fixture 16 can be replaced according to different battery pack models of the power battery, thus realizing the universality of the material rack 14 to adapt to different battery packs.

[0046] In addition, the material rack 14 is equipped with a foldable handle 141, which is used to push the material rack 14 to move. Therefore, when not in use, the handle 141 is folded, thereby reducing the space occupied.

[0047] For example, the bottom of the material rack 14 is provided with directional wheels 143 and universal wheels 142 with brakes, so as to facilitate sliding and locking within the limited space.

[0048] This drying equipment has the following beneficial effects: 1. Absolutely safe, eliminating the risk of fire. The condenser heat exchange surface of the air source heat pump 2 is a low-temperature heat source (usually below 65℃), which is far below the ignition point of adhesives or other flammable materials, eliminating the risk of ignition at the source. It is particularly suitable for production scenarios with extremely high safety requirements, such as power batteries.

[0049] 2. Extreme energy saving and drastic cost reduction. It makes full use of the free heat energy in the air, with a coefficient of performance (COP) of up to 3.0-4.0. Compared with electric heating equipment, it can save 60%-75% of operating energy consumption, resulting in extremely significant economic benefits.

[0050] 3. Zero pollution emissions, green and environmentally friendly. The drying equipment produces no waste gas, wastewater, or waste residue during operation, making it a pure energy transporter.

[0051] 4. Precise process, improved quality. Intelligent staged temperature and humidity control ensures that each batch of products undergoes a completely consistent curing process, significantly improving the stability and reliability of product quality.

[0052] 5. High efficiency and reliability. Integrated heat recovery optimizes energy utilization efficiency, shortens the overall production cycle, and improves overall equipment efficiency. It also ensures uniform temperature within the drying chamber, preventing internal stress in the power battery caused by inconsistent curing of the structural adhesive at different locations.

[0053] 6. High level of intelligence. The system adopts multi-parameter feedback closed-loop control, which can automatically adjust according to real-time operating conditions, achieving refined and adaptive control.

[0054] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying device for structural adhesive in power batteries, characterized in that, The drying equipment includes a drying chamber (1) and a uniform air circulation component; The drying chamber (1) is equipped with a closable door (11), an air inlet (12) and an air return outlet (13). The drying chamber (1) is equipped with a material rack (14) for placing power batteries. The air circulation assembly includes an air source heat pump (2) and multiple spaced air circulation ducts (3). The air source heat pump (2) is located outside the drying chamber (1). The multiple air circulation ducts (3) are arranged horizontally at intervals on the inner wall of the drying chamber (1). Each air circulation duct (3) is provided with multiple vents (31) arranged at intervals along the axial direction. The air outlet of the air source heat pump (2) is connected to the air supply outlet (12) and each air circulation duct (3) in sequence. The air inlet of the air source heat pump (2) is connected to the return air outlet (13).

2. The drying equipment for structural adhesive in power batteries according to claim 1, characterized in that, The air circulation assembly also includes an air supply static pressure box, the air inlet of which is connected to the air outlet of the air source heat pump (2), and the air outlet of which is connected to the air supply port (12).

3. The drying equipment for structural adhesive in power batteries according to claim 1, characterized in that, The uniform air circulation assembly also includes multiple turbulence fans (4), which are spaced apart in the drying chamber (1) and located at the top of the drying chamber (1).

4. The drying equipment for structural adhesive in power batteries according to claim 1, characterized in that, The drying chamber (1) is equipped with multiple temperature and humidity sensors (5) arranged at intervals.

5. A drying device for structural adhesive in power batteries according to claim 1, characterized in that, The bottom of the drying chamber (1) is provided with multiple limiting strips (15), and the multiple limiting strips (15) form a limiting space. The material rack (14) is movably arranged in the limiting space, and the limiting space is connected to the opening corresponding to the chamber door (11) on the drying chamber (1) so as to allow the material rack (14) to enter and exit.

6. A drying device for structural adhesive in power batteries according to claim 5, characterized in that, The material rack (14) is detachably equipped with a battery pack placement fixture (16), which is used to clamp and position the corresponding power battery.

7. A drying device for structural adhesive in power batteries according to claim 6, characterized in that, The bottom of the battery pack placement fixture (16) has a support plate with a plurality of spaced positioning holes (161). The platform of the material rack (14) has a plurality of spaced positioning pins, each of which is inserted into the corresponding positioning hole (161).

8. A drying device for structural adhesive in power batteries according to claim 5, characterized in that, The material rack (14) is provided with a foldable handle (141), which is used to push the material rack (14) to move.

9. A drying device for structural adhesive in power batteries according to any one of claims 1-8, characterized in that, The temperature inside the drying chamber (1) is 35-65℃.

10. A drying apparatus for structural adhesive in power batteries according to any one of claims 1-8, characterized in that, The air supply outlet (12) and the air distribution duct (3) are both located at the bottom of the drying chamber (1), and the return air outlet (13) is located at the top of the drying chamber (1).

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