Manufacturing method of battery device and adhesive curing system

Abstract

This application provides a method for manufacturing a battery device and an adhesive curing system. The method includes providing a housing, which includes a water-cooled plate; applying adhesive to one side of the water-cooled plate; placing a battery cell assembly into the housing, bringing the battery cell assembly into contact with the adhesive; applying pressure towards the water-cooled plate to the battery cell assembly; providing a heat transfer medium filling unit, connecting the heat transfer medium filling unit to the water-cooled plate via a pipeline to form a heat transfer medium circulation loop; introducing heat transfer medium into the flow channels of the water-cooled plate and circulating the heat transfer medium; during the circulation process, detecting whether the heat transfer medium in the heat transfer medium filling unit is maintained at a preset temperature; if the temperature of the heat transfer medium in the heat transfer medium filling unit is not at the preset temperature, issuing a warning; after the adhesive cures, extracting the heat transfer medium from the water-cooled plate and removing the pressure applied towards the battery cell assembly. The technical solution provided by this application can accelerate adhesive curing, shorten storage time, and reduce adhesive usage.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a method for manufacturing a battery device and an adhesive curing system. Background Technology

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries, as the power source, play an irreplaceable and crucial role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also increasing. Among them, battery devices, as core components of new energy vehicles, have high requirements in terms of stability and reliability in use.

[0003] During the manufacturing process of battery devices, adhesive is applied to the water-cooling plate inside the casing. After the battery cells are placed into the casing, they are bonded to the adhesive. In order to meet the initial curing pressure requirements of the adhesive, additional pressure is usually applied to the adhesive surface to ensure the structural strength and pressing area of ​​the adhesive. However, when the pressure is removed, the adhesive surface is prone to springback, resulting in the separation of the adhesive layer. Furthermore, the adhesive requires a long curing time. In order to ensure the initial curing strength of the adhesive, the product needs to be stored for a long time in the warehousing process, which increases warehousing costs and affects the production cycle of the production line. Summary of the Invention

[0004] This application provides a method for manufacturing a battery device and an adhesive curing system, which can shorten the adhesive curing time, reduce the amount of adhesive used, and lower storage costs.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, embodiments of this application provide a method for manufacturing a battery device. The method includes providing a housing, the housing including a water-cooled plate; applying adhesive to one side of the water-cooled plate; placing a battery cell assembly into the housing, so that the battery cell assembly comes into contact with the adhesive; applying pressure toward the water-cooled plate to the battery cell assembly; providing a heat transfer medium filling unit, connecting the heat transfer medium filling unit to the water-cooled plate through a pipeline to form a heat transfer medium circulation loop, introducing heat transfer medium into the flow channel of the water-cooled plate and circulating the heat transfer medium; during the heat transfer medium circulation process, detecting whether the heat transfer medium in the heat transfer medium filling unit is maintained at a preset temperature; if the temperature of the heat transfer medium in the heat transfer medium filling unit is not at the preset temperature, issuing a warning; after the adhesive has cured, extracting the heat transfer medium from the water-cooled plate and removing the pressure applied toward the battery cell assembly.

[0007] In the technical solution of this application embodiment, after the battery cell pack is placed into the box, pressure is applied to the battery cell pack towards the water-cooling plate, and a heat medium is introduced into the flow channel of the water-cooling plate. The heat of the heat medium is transferred to the water-cooling plate, causing the water-cooling plate to heat up rapidly. This accelerates the curing speed of the adhesive on the water-cooling plate and the battery cell pack, shortens the time required for adhesive curing, and thus shortens the storage time in the subsequent battery device storage process, speeds up the production cycle of the battery device, and reduces storage costs. Since the heat of the heat medium in the water-cooling plate is transferred to the water-cooling plate, the temperature of the heat medium in the water-cooling plate will gradually decrease over time. Therefore, by connecting the heat transfer medium filling unit to the water-cooled plate through pipelines, heat transfer medium is introduced into the flow channels of the water-cooled plate and circulated. This circulation draws out the heat transfer medium from the water-cooled plate and continuously injects new heat transfer medium through the filling unit, maintaining a higher temperature within the water-cooled plate. This achieves uniform, stable, rapid, and effective heating of the water-cooled plate, facilitating faster and more uniform curing of the adhesive, shortening curing time, reducing storage costs, and improving the production efficiency of the battery device. By detecting whether the heat transfer medium in the filling unit maintains a preset temperature, it can be determined whether the curing time of the water-cooled plate is as required. When the temperature of the heat transfer medium in the filling unit is not at the preset temperature, it indicates a malfunction in the heating component within the unit, triggering an early warning to prompt personnel to inspect the equipment. This prevents the adhesive from failing to cure properly due to the heat transfer medium temperature not meeting the preset requirements and continuing heating for the preset time. Furthermore, this solution employs a method of continuously applying pressure to the battery cell assembly and heating the adhesive with a water-cooling plate, enabling the adhesive on the water-cooling plate to cure more quickly. Once the adhesive has cured, when the pressure towards the battery cell assembly is removed, the adhesive is less prone to rebound. Consequently, unlike existing technologies that require increasing the thickness of the adhesive to reduce separation due to rebound, the amount of adhesive applied can be reduced, achieving the structural strength between the adhesive and the battery cell assembly. Moreover, secondary adhesive application is not required, further reducing the amount of adhesive used.

[0008] According to some embodiments of this application, the air in the flow channel of the water-cooled plate is evacuated before the heat medium is introduced into the flow channel.

[0009] In the above scheme, by evacuating the air from the flow channels of the water-cooled plate before introducing the heat transfer medium, two advantages are achieved. First, evacuation allows for advance inspection of the airtightness of the flow channels inside the water-cooled plate, reducing the risk of leakage. Second, evacuation increases the vacuum level within the flow channels, facilitating the efficient filling of the heat transfer medium and reducing the impact of gas obstruction on the filling efficiency.

[0010] According to some embodiments of this application, the heat medium includes one of hot water, hot steam, ethylene glycol, or hot oil.

[0011] In the above schemes, when hot water is used as the heat medium, its high specific heat capacity means that the temperature change is minimal after the heat is transferred to the water-cooled plate, allowing for continuous and effective heating. Furthermore, hot water does not contaminate the flow channels of the water-cooled plate. When steam is used as the heat medium, it can also heat the water-cooled plate. However, steam has a lower specific heat capacity than hot water, making a circulating heat medium more suitable for heating the plate. Steam also avoids contaminating the flow channels. Using ethylene glycol or hot oil as the heat medium also effectively heats the water-cooled plate. The specific heat medium can be chosen from hot water, steam, ethylene glycol, or hot oil depending on the specific circumstances.

[0012] Secondly, embodiments of this application also provide an adhesive curing system, which includes a water-cooled plate and a heat medium injection unit. The water-cooled plate has a flow channel. The heat medium injection unit includes a storage tank and a first pump. The storage tank stores heat medium. One end of the first pump is connected to the storage tank, and the other end is connected to the inlet of the flow channel of the water-cooled plate to provide heat medium to the water-cooled plate.

[0013] In the above scheme, a heat medium is stored in the liquid storage tank. One end of the first pump is connected to the liquid storage tank, and the other end is connected to the inlet of the flow channel of the water-cooled plate. The first pump provides power to pump the medium in the liquid storage tank into the flow channel in the water-cooled plate, thereby heating the water-cooled plate and allowing the adhesive on the water-cooled plate to cure faster, thus shortening the time required for the adhesive to cure.

[0014] According to some embodiments of this application, a heating element is provided in the liquid storage tank, which is used to heat the heat medium in the liquid storage tank.

[0015] In the above scheme, by installing a heating component inside the storage tank, on the one hand, the heating component can heat the medium in the storage tank to obtain a heat medium, eliminating the need for external input of the heat medium and optimizing the structure of the heat medium filling unit. On the other hand, the heating component can control the temperature of the heat medium in the storage tank, maintaining it at a preset temperature, which is beneficial for subsequent circulation of the heat medium and allows it to better heat and control the water-cooled plate.

[0016] According to some embodiments of this application, a first temperature detection component is provided in the liquid storage tank. The first temperature detection component is used to detect the temperature of the heat medium in the liquid storage tank. The glue curing system also includes a control module. The first temperature detection component and the heating component are both electrically connected to the control module. The control module is used to control the heating component to open and close according to the temperature information detected by the first temperature detection component, so as to maintain the temperature of the heat medium in the liquid storage tank at a preset temperature.

[0017] In the above solution, a first temperature detection component is installed in the liquid storage tank. The first temperature detection component can detect the temperature of the heat medium in the liquid storage tank. Both the first temperature detection component and the heating component are electrically connected to the control module. The control module can control the opening and closing of the heating component according to the temperature information detected by the first temperature detection component, so that the temperature of the heat medium in the liquid storage tank is always maintained at the preset temperature. The temperature consistency of the heat medium in the flow channel of the water-cooled plate is better, and the time required for the adhesive to cure on the water-cooled plate is at a more stable value, so that the degree of curing of the adhesive is more constant and more controllable.

[0018] According to some embodiments of this application, the adhesive curing system further includes a vacuum pump connected to the inlet of the flow channel of the water-cooled plate, and the vacuum pump is used to extract air from the flow channel of the water-cooled plate.

[0019] In the above scheme, the vacuum pump can evacuate the air inside the flow channels of the water-cooled plate. On the one hand, evacuation allows for advance inspection of the airtightness of the flow channels inside the water-cooled plate, reducing the risk of leakage. On the other hand, evacuation increases the vacuum level inside the flow channels of the water-cooled plate, which is more conducive to the charging of the heat transfer medium, improving the charging efficiency and reducing the impact of gas obstruction on the charging efficiency.

[0020] According to some embodiments of this application, a first valve is provided between the vacuum pump and the inlet of the water-cooled plate's flow channel, and a second valve is provided between the first pump and the inlet of the water-cooled plate's flow channel.

[0021] In the above scheme, the opening and closing of the first valve and the second valve can be controlled by setting the first valve and the second valve, so as to realize the vacuuming and heat medium injection of the water cooling plate. The control is convenient and quick, and the two do not interfere with each other.

[0022] According to some embodiments of this application, the first pump is a bidirectional water pump.

[0023] In the above scheme, by using a bidirectional water pump as the first pump, the first pump can transfer the heat medium in the storage tank to the flow channel of the water-cooled plate, and can also pump the heat medium in the water-cooled plate back to the storage tank. In actual use, the first pump can realize the circulation of the heat medium. During the process of using the heat medium to cure and heat the adhesive on the water-cooled plate, since the temperature of the heat medium will decrease over time, the first pump can periodically pump a portion of the heat medium in the water-cooled plate back to the storage tank, and pump the heat medium with a higher temperature in the storage tank to the water-cooled plate, realizing the circulation supply of the heat medium. The circulation heating of the heat medium can be achieved using only one first pump and a single pipeline, making the structure of the heat medium filling unit simpler and the cost lower.

[0024] According to some embodiments of this application, the flow channel outlet of the water-cooled plate is connected to the liquid storage tank.

[0025] In the above scheme, the outlet of the water-cooled plate is connected to the liquid storage tank, and the first pump continuously introduces heat medium into the flow channel in the water-cooled plate. Excess heat medium in the water-cooled plate can flow back to the liquid storage tank from the outlet of the flow channel, thereby realizing the circulation of heat medium.

[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0029] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0030] Figure 3 This is a schematic diagram showing the interaction between a heat medium injection unit and a water-cooled plate in an adhesive curing system provided in some embodiments of this application;

[0031] Figure 4 A top view of the liquid storage tank in a heat medium filling unit provided in some embodiments of this application;

[0032] Figure 5 This is a schematic diagram showing the interaction between a heat medium injection unit and a water-cooled plate in an adhesive curing system provided in other embodiments of this application;

[0033] Figure 6 A schematic diagram of the heat medium injection unit and water cooling plate in an adhesive curing system provided in some embodiments of this application;

[0034] Figure 7 This is a schematic diagram of the control logic of an adhesive curing system provided in some embodiments of this application.

[0035] Icons: 1000 - Vehicle; 100 - Battery Unit; 200 - Controller; 300 - Motor; 10 - Housing; 11 - First Sub-Housing; 12 - Second Sub-Housing; 13 - Water-Cooling Plate; 131 - Adhesive; 20 - Battery Cell; 24 - Battery Cell Pack; 400 - Adhesive Curing System; 410 - Heat Transfer Unit; 411 - Storage Tank; 412 - First Pump; 413 - Heating Component; 414 - First Temperature Detection Component; 415 - Second Valve; 416 - First Pipeline; 420 - Control Module; 430 - Vacuum Pump; 431 - First Valve; 432 - Second Pipeline; 440 - Third Pipeline. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0038] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0042] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0043] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0044] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell groups housed within the housing.

[0045] As an example, a battery cell pack can be a battery module, and the battery cell pack can be housed in a housing by fixing the battery module in the housing.

[0046] As an example, battery cell packs can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0047] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0048] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0049] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0050] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0051] A single battery cell typically includes an electrode assembly. The electrode assembly comprises a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0052] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0053] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0054] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, carbon electrodes, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0055] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery cells may also be used.

[0056] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0057] As an example, the negative electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc.

[0058] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0059] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials in battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0060] In some embodiments, the diaphragm is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0061] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0062] In some embodiments, the membrane is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0063] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0064] In some implementations, the electrode assembly is a stacked structure.

[0065] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0066] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The casing may have one or more openings. The end cap may also be provided one or more times.

[0067] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0068] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0069] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. There are no particular limitations in the embodiments of this application.

[0070] During the manufacturing process of battery devices, adhesive is applied to the water-cooling plate inside the casing. After the battery cells are placed into the casing, they are bonded to the adhesive. In traditional production methods, additional pressure is usually applied to the adhesive surface to ensure the structural strength and bonding area of ​​the adhesive. However, when the pressure is removed, the adhesive surface is prone to springback, resulting in adhesive layer separation (dendritic bonding). Adhesive curing takes time. In the current production model, the bottom of the casing is at room temperature after adhesive application. To ensure the initial strength of the adhesive, the product needs to be stored for more than 12 hours in the warehousing process, significantly increasing storage costs and affecting the production cycle of battery products.

[0071] In view of this, in order to shorten the curing time of the adhesive and reduce storage costs, some embodiments of this application provide a method for manufacturing a battery device. The method includes providing a housing, the housing including a water-cooled plate; applying adhesive to one side of the water-cooled plate; placing a battery cell assembly into the housing so that the battery cell assembly comes into contact with the adhesive; applying pressure toward the water-cooled plate to the battery cell assembly; providing a heat medium filling unit, connecting the heat medium filling unit to the water-cooled plate through a pipeline to form a heat medium circulation loop, and introducing heat medium into the flow channel of the water-cooled plate to circulate the heat medium; during the heat medium circulation process, detecting whether the heat medium in the heat medium filling unit is maintained at a preset temperature; if the temperature of the heat medium in the heat medium filling unit is not at the preset temperature, issuing a warning; after the adhesive has cured, extracting the heat medium from the water-cooled plate and removing the pressure applied toward the battery cell assembly.

[0072] The battery device provided in this application applies pressure to the battery cells towards the water-cooled plate after they are placed in the casing. A heat transfer medium is then introduced into the water-cooled plate's flow channels, transferring heat to the plate and causing it to heat up rapidly. This accelerates the curing of the adhesive bonded to the battery cells, shortening the curing time and consequently reducing storage time in the subsequent battery device storage process. This speeds up the production cycle and reduces storage costs. However, the temperature of the heat transfer medium within the water-cooled plate gradually decreases over time. Therefore, by connecting the heat transfer medium filling unit to the water-cooled plate through pipelines, heat transfer medium is introduced into the flow channels of the water-cooled plate and circulated. This circulation allows the heat transfer medium inside the water-cooled plate to be extracted and continuously injected through the filling unit, maintaining a high temperature within the plate. This achieves uniform, stable, rapid, and effective heating of the water-cooled plate, facilitating faster and more uniform curing of the adhesive, shortening curing time, reducing storage costs, and improving the production efficiency of the battery device. Furthermore, this solution utilizes continuous pressure applied to the battery cells and heating of the adhesive by the water-cooled plate, enabling faster curing of the adhesive on the water-cooled plate. Once cured, the adhesive is less prone to springback when the pressure is released from the battery cells. This eliminates the need to increase the adhesive thickness as in existing technologies to reduce separation due to springback, reducing the amount of adhesive applied while maintaining structural strength between the adhesive and the battery cells. It also eliminates the need for secondary adhesive application, further reducing adhesive usage.

[0073] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery device disclosed in this application.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0075] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0076] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0077] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0078] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first sub-housing 11 and a second sub-housing 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second sub-housing 12 may be a hollow structure with one open end, while the first sub-housing 11 may be a plate-like structure, covering the open side of the second sub-housing 12 so that the first sub-housing 11 and the second sub-housing 12 jointly define the space. Alternatively, both the first sub-housing 11 and the second sub-housing 12 may be hollow structures with one open side, with the open side of the first sub-housing 11 covering the open side of the second sub-housing 12.

[0080] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also be composed of multiple battery cells 20 first connected in series, in parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10.

[0081] The battery device 100 may also include other structures, such as a busbar for electrical connection between multiple battery cells 20.

[0082] This application provides a method for manufacturing a battery device. Please follow the instructions. Figures 3 to 7 The manufacturing method includes providing a housing 10, which includes a water-cooled plate 13; applying adhesive 131 to one side of the water-cooled plate 13; placing a battery cell assembly 24 into the housing 10, so that the battery cell assembly 24 comes into contact with the adhesive 131; applying pressure to the battery cell assembly 24 toward the water-cooled plate 13; providing a heat transfer medium filling unit 410, connecting the heat transfer medium filling unit 410 to the water-cooled plate 13 through a pipeline to form a heat transfer medium circulation loop; introducing heat transfer medium into the flow channel of the water-cooled plate 13 and circulating the heat transfer medium; during the circulation of the heat transfer medium, detecting whether the heat transfer medium in the heat transfer medium filling unit 410 is maintained at a preset temperature; if the temperature of the heat transfer medium in the heat transfer medium filling unit 410 is not at the preset temperature, issuing a warning; after the adhesive 131 has cured, extracting the heat transfer medium from the water-cooled plate 13 and removing the pressure applied toward the battery cell assembly 24.

[0083] The housing 10 provides space for the battery cell pack 24, and the housing 10 can adopt various structures. The water-cooled plate 13 is part of the housing 10. For example, for bottom water cooling of CTP battery modules (module-less power battery module packs), the water-cooled plate 13 can be directly integrated into the housing frame. The battery unit 100 is suitable for CTP batteries or lower housings containing the water-cooled plate 13 that require adhesive application. The water-cooled plate 13 is a key component for cooling the battery system, mainly using liquid cooling technology to reduce the heat generated by the battery during operation, ensuring that the battery operates within its optimal operating temperature range. The water-cooled plate 13 has internal channels for the flow of working fluid, thereby achieving heat transfer between the working fluid and the battery, and achieving the purpose of controlling the battery temperature. The channels of the water-cooled plate 13 refer to the channels formed within the water-cooled plate 13 itself, which allow coolant circulation during the operation of the battery unit, achieving cooling of the battery unit.

[0084] Adhesive 131 is an adhesive layer applied to the side of the water-cooled plate 13 facing the battery cell assembly 24. Adhesive 131 can be a structural adhesive. Adhesive curing can refer to initial curing or curing for a period of time after initial curing and reaching a preset bonding strength. Initial curing refers to the initial degree of curing of the adhesive 131 after application, i.e., the adhesive begins to dry, the surface is no longer sticky to the touch, but the interior may not yet be fully cured. At this stage, the adhesive gradually changes from a liquid state to a gel state; pressing will leave marks, but the surface has hardened and is no longer sticky.

[0085] The heat medium injection unit 410 refers to the injection mechanism that can introduce heat medium into the flow channel inside the water-cooled plate 13. The heat medium injection unit 410 is connected to the water-cooled plate 13 through pipelines to form a heat medium circulation loop. This means that the heat medium injection unit 410 can realize the heat medium circulation loop through the flow channel of the water-cooled plate 13 through pipelines, so that the heat medium injected into the water-cooled plate 13 and the heat medium in the heat medium injection unit 410 can circulate with each other, so that the heat medium in the water-cooled plate 13 is at a higher temperature, which accelerates the curing speed of the adhesive 131.

[0086] After the water-cooled plate 13 is filled with heat medium, the heat medium inside the water-cooled plate 13 is circulated with the external heat medium supply unit. This avoids the problem of prolonged curing time of adhesive 131 due to heat exchange and cooling of the heat medium inside the water-cooled plate 13. It can further accelerate the heating and temperature rise of the water-cooled plate 13 by the heat medium and shorten the curing time of adhesive 131.

[0087] The heat medium filling unit 410 is equipped with a heating element 413, which continuously controls the temperature of the heat medium in the heat medium filling unit 410. To detect whether the heat medium in the heat medium filling unit 410 is maintained at a preset temperature, a temperature sensor is installed in the heat medium filling unit 410, and the temperature of the heat medium provided by the heat medium filling unit 410 is detected in real time by the temperature sensor.

[0088] If the temperature of the heat medium in the heat medium filling unit 410 is not at the preset temperature, and the glue 131 is still cured according to the preset time, the glue 131 will not be fully cured before the battery device is transferred, resulting in the problem of glue layer separation. Therefore, by issuing a warning, it can serve as a reminder and warning to the staff.

[0089] In existing technologies, when bonding battery cells to the adhesive 131 on the water-cooling plate 13, the coating thickness of the adhesive 131 and the pressure applied under the adhesive layer are typically increased to ensure the bonding area, thereby improving the structural strength of the adhesive 131 and the battery cells. However, when the pressure is released, because the adhesive 131 has not yet reached its initial curing state, a phenomenon of adhesive 131 rebounding and separation of the adhesive layer (dendritic bonding) often occurs, requiring additional adhesive or increasing the adhesive layer thickness to achieve the desired structural strength, which also increases the cost of adhesive. Furthermore, since the adhesive 131 inside the battery device is not fully cured, the storage time for transferring the battery device to the initial curing stage may reach more than 12 hours, depending on the ambient temperature, which significantly increases storage costs and affects production efficiency.

[0090] In the technical solution of this application embodiment, after the battery cell pack 24 is placed in the box, pressure is applied to the battery cell pack 24 towards the water-cooled plate 13, and a heat medium is introduced into the flow channel of the water-cooled plate 13. The heat of the heat medium is transferred to the water-cooled plate 13, causing the water-cooled plate 13 to heat up rapidly. This accelerates the curing speed of the adhesive 131 on the water-cooled plate 13 and the battery cell pack 24, shortens the curing time required for the adhesive 131, and thus shortens the storage time in the subsequent storage stage of the battery device 100, speeds up the production cycle of the battery device 100, and reduces storage costs. Since the heat of the heat medium in the water-cooled plate 13 is transferred to the water-cooled plate 13, the temperature of the heat medium in the water-cooled plate 13 will gradually decrease over time. Therefore, by connecting the heat transfer medium filling unit 410 to the water-cooled plate 13 through a pipeline, heat transfer medium is introduced into the flow channel of the water-cooled plate 13 and circulated. The heat transfer medium circulation can extract the heat transfer medium in the water-cooled plate 13 and continuously inject new heat transfer medium through the heat transfer medium filling unit 410, so that the heat transfer medium in the water-cooled plate 13 is at a higher temperature, thereby achieving uniform, stable, rapid and effective heating of the water-cooled plate 13. This is more conducive to the rapid and uniform curing of the adhesive 131 of the water-cooled plate 13, shortening the curing time of the adhesive 131, reducing storage costs, and improving the production efficiency of the battery device. By detecting whether the heat medium in the heat medium filling unit 410 is maintained at the preset temperature, it can be determined whether the curing time of the water-cooled plate 13 is cured according to the preset time. When the temperature of the heat medium in the heat medium filling unit 410 is not at the preset temperature, it indicates that the heating component 413 in the heat medium filling unit 410 has malfunctioned. An early warning prompt can be issued to remind the staff to check the equipment to avoid the problem that the curing effect of the glue 131 does not meet the requirements due to the heat medium temperature not meeting the preset requirements continuing to heat and cure according to the preset time. Furthermore, by continuously applying pressure to the battery cell assembly 24 and heating the adhesive 131 on the water-cooling plate 13, the adhesive 131 on the water-cooling plate 13 can be cured more quickly. When the adhesive 131 is cured and the pressure towards the battery cell assembly 24 is removed, the adhesive 131 is less likely to rebound. Therefore, it is not necessary to increase the thickness of the adhesive 131 as in the prior art to reduce the separation of the adhesive layer due to rebound. The amount of adhesive 131 can be reduced, thus achieving the structural strength of the adhesive 131 and the battery cell assembly 24. Moreover, secondary glue application is not required, which can reduce the amount of adhesive 131 used.

[0091] According to some embodiments of this application, the air in the flow channel of the water-cooled plate 13 is evacuated before the heat medium is introduced into the flow channel of the water-cooled plate 13.

[0092] Vacuuming refers to removing the air from the flow channels of the water-cooled plate 13 to achieve a preset vacuum level, such as ≤5 mbar. Of course, the actual vacuum level can be set according to specific requirements. Vacuuming can be performed using a vacuum pump 430, with its pumping end connected to the flow channels of the water-cooled plate 13 to remove the air.

[0093] By evacuating the air from the flow channels of the water-cooled plate 13 before introducing the heat transfer medium, two advantages are achieved. First, evacuation allows for advance inspection of the airtightness of the flow channels inside the water-cooled plate 13, reducing the risk of leakage. Second, evacuation increases the vacuum level within the flow channels of the water-cooled plate 13, facilitating the efficient addition of the heat transfer medium and reducing the impact of gas obstruction on the efficiency of heat transfer.

[0094] According to some embodiments of this application, the heat medium includes one of hot water, hot steam, ethylene glycol, or hot oil. In this embodiment, hot water is selected as the heat medium, and the temperature of the heat medium can be between 50°C and 90°C, with the specific temperature depending on the actual situation.

[0095] When hot water is used as the heat transfer medium, its high specific heat capacity means that the temperature change of the hot water after it is transferred to the water-cooled plate 13 is not significant. This allows for sustained and effective heating of the water-cooled plate 13, resulting in good heating performance. Furthermore, the hot water does not contaminate the flow channels of the water-cooled plate 13. When steam is used as the heat transfer medium, it can also heat the water-cooled plate 13. However, steam has a lower specific heat capacity than hot water, making a circulating heat transfer medium a more suitable method for heating the water-cooled plate 13. Steam also does not contaminate the flow channels of the water-cooled plate 13. Using ethylene glycol or hot oil as the heat transfer medium also effectively heats the water-cooled plate 13. The specific heat transfer medium can be selected from hot water, steam, ethylene glycol, or hot oil depending on the actual situation.

[0096] This application also provides an adhesive curing system; please refer to... Figures 3 to 7 The adhesive curing system 400 includes a water-cooled plate 13 and a heat medium injection unit 410. The water-cooled plate 13 has a flow channel. The heat medium injection unit 410 includes a liquid storage tank 411 and a first pump 412. The liquid storage tank 411 stores heat medium. One end of the first pump 412 is connected to the liquid storage tank 411, and the other end is connected to the inlet of the flow channel of the water-cooled plate 13 to provide heat medium to the water-cooled plate 13.

[0097] The storage tank 411 refers to a closed or semi-closed container for storing the medium; for example, the storage tank 411 can be a barrel. The first pump 412 can be a water pump, which provides the power to pump the medium in the storage tank 411 to the flow channel in the water-cooled plate 13.

[0098] The storage tank 411 contains a heat medium. One end of the first pump 412 is connected to the storage tank 411, and the other end is connected to the inlet of the flow channel of the water-cooled plate 13. The first pump 412 provides power to pump the medium in the storage tank 411 into the flow channel in the water-cooled plate 13, thereby heating the water-cooled plate 13 and allowing the adhesive 131 on the water-cooled plate 13 to cure faster, thus shortening the curing time required for the adhesive 131.

[0099] According to some embodiments of this application, a heating element 413 is provided in the liquid storage tank 411, and the heating element 413 is used to heat the heat medium in the liquid storage tank 411.

[0100] The heating element 413 can be a resistance wire, a tubular heating element, or a non-metallic heating element. When the heating element 413 is a resistance wire, please refer to... Figure 4 The resistance wire can be wound around the liquid storage tank 411. When the resistance wire is energized, the heat generated by the resistance heats up the medium in the liquid storage tank 411.

[0101] By providing a heating element 413 within the storage tank 411, the heating element 413 can heat the medium within the storage tank 411 to obtain a heat medium, eliminating the need for external input of the heat medium and optimizing the structure of the heat medium filling unit 410. Furthermore, the heating element 413 can control the temperature of the heat medium within the storage tank 411, maintaining it at a preset temperature. This facilitates subsequent circulation of the heat medium and allows for better heating and temperature control of the water-cooled plate 13.

[0102] According to some embodiments of this application, please refer to Figure 3 , Figure 4 and Figure 7 The liquid storage tank 411 is equipped with a first temperature detection component 414, which is used to detect the temperature of the heat medium in the liquid storage tank 411. The glue curing system 400 also includes a control module 420. The first temperature detection component 414 and the heating component 413 are both electrically connected to the control module 420. The control module 420 is used to control the heating component 413 to open and close according to the temperature information detected by the first temperature detection component 414, so as to maintain the temperature of the heat medium in the liquid storage tank 411 at a preset temperature.

[0103] The first temperature detection component 414 refers to a detection component capable of detecting the temperature of the thermal medium in the storage tank 411. The first temperature detection component 414 can be a temperature sensor.

[0104] The control module 420 refers to a digital computing controller with a microprocessor for automated control. It can load control instructions into memory for storage and execution at any time. The control module 420 can be a microcontroller.

[0105] The control module 420 controls the heating element 413 to start and stop based on the temperature information detected by the first temperature detection element 414. Specifically, when the temperature detected by the first temperature detection element 414 is lower than a preset temperature, the heating element 413 is controlled to operate to heat the medium in the storage tank 411 to the preset temperature. When the temperature detected by the first temperature detection element 414 is higher than the preset temperature, the heating element 413 is controlled to stop operating.

[0106] By installing a first temperature detection component 414 inside the liquid storage tank 411, the first temperature detection component 414 can detect the temperature of the heat medium inside the liquid storage tank 411. Both the first temperature detection component 414 and the heating component 413 are electrically connected to the control module 420. The control module 420 can control the opening and closing of the heating component 413 according to the temperature information detected by the first temperature detection component 414, so that the temperature of the heat medium inside the liquid storage tank 411 is always maintained at the preset temperature. The temperature consistency of the heat medium in the flow channel inside the water-cooled plate 13 is better, and the time required for the adhesive 131 on the water-cooled plate 13 to cure is at a more stable value, so that the degree of curing of the adhesive 131 is more constant and more controllable.

[0107] According to some embodiments of this application, please refer to Figure 3 The adhesive curing system 400 also includes a vacuum pump 430, which is connected to the inlet of the flow channel of the water-cooled plate 13 and is used to extract air from the flow channel of the water-cooled plate 13.

[0108] A vacuum pump 430 refers to a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container to obtain a vacuum. In simpler terms, a vacuum pump 430 is a device that uses various methods to improve, generate, and maintain a vacuum in a closed space.

[0109] The vacuum pump 430 can be connected to the inlet of the flow channel of the water-cooled plate 13 through an independent pipeline, or it can share the pipeline of the first pump 412 and the inlet of the flow channel of the water-cooled plate 13. A switching valve needs to be installed on the first pump 412 and the vacuum pump 430 respectively.

[0110] For example, please refer to Figure 3The inlet of the flow channel of the first pump 412 and the water-cooled plate 13 are connected through the first pipe 416, and the vacuum pump 430 can also be connected to the inlet of the flow channel of the water-cooled plate 13 through the first pipe 416. Of course, please refer to... Figure 5 The inlet of the flow channel of the first pump 412 and the water-cooled plate 13 is connected through the first pipe 416, and the vacuum pump 430 is connected to the inlet of the flow channel of the water-cooled plate 13 through the second pipe 432. At this time, an adapter can be set at the inlet of the flow channel of the water-cooled plate 13, and both the first pipe 416 and the second pipe 432 can be connected to the inlet of the flow channel of the water-cooled plate 13 through the adapter.

[0111] By using vacuum pump 430, the air inside the flow channels of water-cooled plate 13 can be evacuated. On the one hand, evacuation allows for advance inspection of the airtightness of the flow channels inside water-cooled plate 13, reducing the risk of leakage. On the other hand, evacuation increases the vacuum level inside the flow channels of water-cooled plate 13, which is more conducive to improving the charging efficiency of the heat transfer medium and reducing the impact of gas obstruction on the charging efficiency of the heat transfer medium inside water-cooled plate 13.

[0112] According to some embodiments of this application, a first valve 431 is provided between the vacuum pump 430 and the inlet of the flow channel of the water-cooled plate 13, and a second valve 415 is provided between the first pump 412 and the inlet of the flow channel of the water-cooled plate 13.

[0113] The first valve 431 and the second valve 415 can be manual valves, controlled manually. Of course, the first valve 431 and the second valve 415 can also be solenoid valves. They are electrically controlled by the control module 420 of the glue curing system 400. The first pump 412, the vacuum pump 430, the first valve 431 and the second valve 415 are all electrically connected to the control module 420 to realize the opening, closing and switching control of the first pump 412, the vacuum pump 430, the first valve 431 and the second valve 415, and to complete the vacuuming and heat medium filling operations of the water-cooled plate 13.

[0114] Additionally, please refer to Figure 3 Vacuum pump 430 and first pump 412 can be connected to the inlet of the flow channel of water-cooled plate 13 through the same first pipe 416, or they can be connected to the inlet of the flow channel of water-cooled plate 13 through different pipes. Please refer to [reference needed]. Figure 5 For example, the inlet of the flow channel of the first pump 412 is connected to the inlet of the flow channel of the water-cooled plate 13 through the first pipe 416, and the vacuum pump 430 is connected to the inlet of the flow channel of the water-cooled plate 13 through the second pipe 432.

[0115] With both vacuum pump 430 and the first pump 412 connected to the inlet of the flow channel of the water-cooled plate 13 via the first pipe 416, the first valve 431 is located between the inlet of vacuum pump 430 and the inlet of the first pipe 416, and the second valve 415 is located between the inlet of the first pump 412 and the inlet of the first pipe 416. When a vacuuming step is required for the water-cooled plate 13, the first valve 431 is opened and the second valve 415 is closed. When a heat medium filling operation is required, the first valve 431 is closed and the second valve 415 is opened.

[0116] When the vacuum pump 430 and the first pump 412 are connected to the inlet of the flow channel of the water-cooled plate 13 through different pipelines, the first valve 431 is installed on the second pipeline 432, and the second valve 415 is installed on the first pipeline 416. Similarly, when a vacuuming step is required for the water-cooled plate 13, the first valve 431 is opened, the second valve 415 is closed, or the first pump 412 is stopped. When a heat medium filling operation is required, the first valve 431 is closed, or the vacuum pump 430 is stopped, and the second valve 415 is opened.

[0117] By setting the first valve 431 and the second valve 415, the opening and closing of the first valve 431 and the second valve 415 can be controlled to realize the vacuuming and heat medium injection operations of the water-cooled plate 13. The control is convenient and quick, and the two do not interfere with each other.

[0118] According to some embodiments of this application, the first pump 412 is a bidirectional water pump.

[0119] A bidirectional water pump mainly consists of inlet and outlet valves, an impeller, a pump body, and a motor. In forward operation, the inlet and outlet valves are open, the motor drives the impeller to rotate, drawing water from the inlet. The centrifugal force generated by the impeller's rotation then propels the water towards the outlet. In reverse operation, the inlet and outlet valves are closed, the inlet and outlet positions are reversed, the motor drives the impeller to rotate in the opposite direction, drawing water from the outlet, and then using centrifugal force to propel the water towards the inlet. In this way, the bidirectional water pump can adjust the direction of water delivery to meet different water circulation needs.

[0120] By using a bidirectional water pump as the first pump 412, the first pump 412 can transfer the heat medium in the storage tank 411 to the flow channel of the water-cooled plate 13, and can also pump the heat medium in the water-cooled plate 13 back to the storage tank 411. In actual use, the first pump 412 can realize the circulation of the heat medium. During the process of using the heat medium to cure and heat the glue 131 on the water-cooled plate 13, since the temperature of the heat medium will decrease over time, the first pump 412 can periodically pump a portion of the heat medium in the water-cooled plate 13 back to the storage tank 411, and pump the heat medium with a higher temperature in the storage tank 411 to the water-cooled plate 13, realizing the circulation supply of the heat medium. The circulation heating of the heat medium can be realized by using only one first pump 412 and a single pipeline, making the structure of the heat medium filling unit 410 simpler and the cost lower.

[0121] According to some embodiments of this application, please refer to Figure 6 The flow channel outlet of the water-cooled plate 13 is connected to the liquid storage tank 411.

[0122] The flow channel outlet of the water-cooled plate 13 is connected to the liquid storage tank 411, meaning that the flow channel outlet of the water-cooled plate 13 can be connected to the liquid storage tank 411 through the third pipe 440. The height of the flow channel outlet of the water-cooled plate 13 can be higher than the height of the liquid in the storage tank, so that excess heat medium can flow back into the liquid storage tank 411 under the action of gravity after flowing out of the flow channel outlet. Of course, a second pump can also be installed on the third pipe 440, without considering the positional relationship between the liquid storage tank 411 and the water-cooled plate 13. The second pump can provide power, and after the water-cooled plate 13 is filled with heat medium, the flow rates of the first pump 412 and the second pump are equal, that is, the amount of liquid delivered by the pumps per unit time is equal. This can realize the circulation supply of heat medium, accelerate the curing of the adhesive 131 on the water-cooled plate 13, and shorten the curing time of the adhesive 131.

[0123] The flow channel outlet of the water-cooled plate 13 is connected to the liquid storage tank 411. The first pump 412 continuously pumps heat medium into the flow channel in the water-cooled plate 13. Excess heat medium in the water-cooled plate 13 can flow back from the flow channel outlet to the liquid storage tank 411, thereby realizing the circulation of heat medium.

[0124] In some embodiments, the manufacturing method includes providing a housing 10, the housing 10 including a water-cooled plate 13; applying adhesive 131 to one side of the water-cooled plate 13; placing a battery cell assembly 24 into the housing 10, so that the battery cell assembly 24 contacts the adhesive 131; applying pressure toward the water-cooled plate 13 to the battery cell assembly 24, evacuating the air in the flow channel of the water-cooled plate 13, providing a heat medium filling unit 410, connecting the heat medium filling unit 410 to the water-cooled plate 13 through a pipeline to form a heat medium circulation loop; introducing a heat medium into the flow channel of the water-cooled plate 13 and circulating the heat medium, the heat medium being hot water; after the adhesive 131 has cured, extracting the heat medium from the water-cooled plate 13 and removing the pressure applied toward the battery cell assembly.

[0125] By evacuating the air from the flow channels of the water-cooled plate 13 before introducing the heat transfer medium, two advantages are achieved. First, evacuation allows for advance inspection of the airtightness of the flow channels, reducing the risk of leakage. Second, evacuation increases the vacuum level within the flow channels, facilitating efficient heat transfer and reducing the impact of gas blockage on heat transfer efficiency. Introducing the heat transfer medium into the flow channels of the water-cooled plate 13 allows for rapid heating, accelerating the curing of the adhesive 131 bonded to the battery cells. This reduces the curing time required for the adhesive 131, thereby shortening the storage time in the subsequent battery assembly 100 storage phase, accelerating the production cycle of the battery assembly 100, and reducing storage costs. Furthermore, by continuously applying pressure to the battery cell assembly 24 and heating the adhesive 131 on the water-cooling plate 13, the adhesive 131 on the water-cooling plate 13 can be initially cured more quickly. When the adhesive 131 is cured and the pressure towards the battery cell assembly 24 is removed, the adhesive 131 will not rebound. Therefore, it is not necessary to increase the thickness of the adhesive 131 as in the prior art to reduce the separation of the adhesive layer due to rebound. The amount of adhesive 131 can be reduced, and the structural strength of the adhesive 131 and the battery cell assembly can be achieved. Moreover, there is no need for secondary glue application, which can reduce the amount of adhesive 131 used.

[0126] As the heat from the heat transfer medium within the water-cooled plate 13 is transferred to the water-cooled plate 13, the temperature of the heat transfer medium within the water-cooled plate 13 gradually decreases over time. Therefore, by connecting the heat transfer medium filling unit 410 to the water-cooled plate 13 through a pipeline, heat transfer medium is introduced into the flow channel of the water-cooled plate 13 and circulated. This circulation allows the heat transfer medium within the water-cooled plate 13 to be extracted and continuously injected through the heat transfer medium filling unit 410, maintaining a higher temperature for the heat transfer medium within the water-cooled plate 13. This achieves uniform, stable, rapid, and effective heating of the water-cooled plate 13, which is more conducive to the rapid and uniform curing of the adhesive 131 on the water-cooled plate 13, shortening the curing time of the adhesive 131, reducing storage costs, and improving the production efficiency of the battery device. Using hot water as the heat transfer medium, given its high specific heat capacity, ensures that the temperature change of the hot water after heat transfer to the water-cooled plate 13 is not significant. This allows for effective and continuous heating of the water-cooled plate 13, resulting in good heating performance, and the hot water does not contaminate the flow channel of the water-cooled plate 13.

[0127] In some embodiments, the adhesive curing system 400 includes a water-cooled plate 13 and a heat medium dispensing unit 410. The water-cooled plate 13 has a flow channel. The heat medium dispensing unit 410 includes a liquid storage tank 411 and a first pump 412. The liquid storage tank 411 stores heat medium and a heating component 413 is provided in the liquid storage tank 411. The heating component 413 is used to heat the heat medium in the liquid storage tank 411. One end of the first pump 412 is connected to the liquid storage tank 411, and the other end is connected to the inlet of the flow channel of the water-cooled plate 13 to provide heat medium to the water-cooled plate 13. A first temperature detection component 414 is provided inside the liquid storage tank 411. The first temperature detection component 414 is used to detect the temperature of the heat medium inside the liquid storage tank 411. The glue curing system 400 also includes a control module 420. The first temperature detection component 414 and the heating component 413 are both electrically connected to the control module 420. The control module 420 is used to control the heating component 413 to open and close according to the temperature information detected by the first temperature detection component 414, so that the temperature of the heat medium inside the liquid storage tank 411 is maintained at a preset temperature.

[0128] One end of the first pump 412 is connected to the liquid storage tank 411, and the other end is connected to the inlet of the flow channel of the water-cooled plate 13. The first pump 412 provides power to pump the medium in the liquid storage tank 411 into the flow channel in the water-cooled plate 13, thereby heating the water-cooled plate 13 and allowing the adhesive 131 on the water-cooled plate 13 to cure faster, shortening the curing time required for the adhesive 131. By providing a heating element 413 in the liquid storage tank 411, on the one hand, the heating element 413 can heat the medium in the liquid storage tank 411 to obtain a heat medium, eliminating the need for external input of heat medium and optimizing the structure of the heat medium filling unit 410. On the other hand, the heating element 413 can control the temperature of the heat medium in the liquid storage tank 411, maintaining the heat medium in the liquid storage tank 411 at a preset temperature, which is beneficial for the subsequent circulation of the heat medium and allows the heat medium to better heat and control the water-cooled plate 13. The first temperature detection component 414 can detect the temperature of the heat medium in the liquid storage tank 411. Both the first temperature detection component 414 and the heating component 413 are electrically connected to the control module 420. The control module 420 can control the opening and closing of the heating component 413 according to the temperature information detected by the first temperature detection component 414, so that the temperature of the heat medium in the liquid storage tank 411 is always maintained at the preset temperature. The temperature consistency of the heat medium in the flow channel of the water-cooled plate 13 is better, and the time required for the curing of the adhesive 131 on the water-cooled plate 13 is at a relatively stable value, so that the curing degree of the adhesive 131 is more constant and more controllable.

[0129] In some embodiments, the adhesive curing system 400 further includes a vacuum pump 430, which is connected to the inlet of the flow channel of the water-cooled plate 13 and is used to extract air from the flow channel of the water-cooled plate 13. A first valve 431 is provided between the vacuum pump 430 and the inlet of the flow channel of the water-cooled plate 13, and a second valve 415 is provided between the first pump 412 and the inlet of the flow channel of the water-cooled plate 13. The flow channel outlet of the water-cooled plate 13 is connected to the liquid storage tank 411.

[0130] The vacuum pump 430 can evacuate the air from the flow channels of the water-cooled plate 13. On one hand, evacuation allows for advance checks of the airtightness of the flow channels inside the water-cooled plate 13, reducing the risk of leakage. On the other hand, evacuation increases the vacuum level within the flow channels of the water-cooled plate 13, facilitating the efficient addition of the heat transfer medium and reducing the impact of gas obstruction on the efficiency of heat transfer. The first valve 431 and the second valve 415 can be controlled to perform both evacuation and heat transfer operations on the water-cooled plate 13, offering convenient and quick control without interference between the two systems. The flow channel outlet of the water-cooled plate 13 is connected to the liquid storage tank 411. The first pump 412 continuously pumps heat medium into the flow channel in the water-cooled plate 13. Excess heat medium in the water-cooled plate 13 can flow back from the flow channel outlet to the liquid storage tank 411, thereby realizing the circulation of heat medium.

[0131] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for manufacturing a battery device, characterized in that, The manufacturing method includes: A housing is provided, the housing including a water-cooled plate; Apply adhesive to one side of the water-cooled plate; The battery cell assembly is placed into the housing, so that the battery cell assembly comes into contact with the adhesive; Apply pressure toward the water-cooling plate to the battery cell assembly; A heat transfer medium filling unit is provided, comprising a storage tank and a first pump. The storage tank stores heat transfer medium. One end of the first pump is connected to the storage tank, and the other end is connected to the inlet of the flow channel of the water-cooled plate to supply heat transfer medium to the water-cooled plate. A first temperature detection component is provided in the storage tank to detect the temperature of the heat transfer medium in the storage tank. The heat transfer medium filling unit is connected to the water-cooled plate through a pipeline to form a heat transfer medium circulation loop. Before introducing heat transfer medium into the flow channel of the water-cooled plate, the air in the flow channel of the water-cooled plate is evacuated. Heat transfer medium is introduced into the flow channel of the water-cooled plate and circulated. A heating component is provided in the heat transfer medium filling unit to continuously control the temperature of the heat transfer medium in the heat transfer medium filling unit. During the circulation of the heat transfer medium, it is detected whether the heat transfer medium in the heat transfer medium filling unit is maintained at a preset temperature. If the temperature of the heat transfer medium in the heat transfer medium filling unit is not at the preset temperature, an early warning is issued. After the adhesive has cured, the heat medium inside the water-cooled plate is extracted, and the pressure applied to the battery cell assembly is removed.

2. The method for manufacturing the battery device according to claim 1, characterized in that, The heat medium includes one of hot water, hot steam, ethylene glycol, or hot oil.

3. An adhesive curing system, characterized in that, include: Water-cooled plate with flow channels; A heat medium filling unit includes a storage tank and a first pump. The storage tank stores heat medium. One end of the first pump is connected to the storage tank, and the other end is connected to the inlet of the flow channel of the water-cooled plate to provide heat medium to the water-cooled plate. A heating component is provided in the storage tank to heat the heat medium in the storage tank. A vacuum pump is connected to the inlet of the flow channel of the water-cooled plate, and the vacuum pump is used to extract air from the flow channel of the water-cooled plate; a first valve is provided between the vacuum pump and the inlet of the flow channel of the water-cooled plate, and a second valve is provided between the first pump and the inlet of the flow channel of the water-cooled plate. The liquid storage tank is equipped with a first temperature detection component, which is used to detect the temperature of the heat medium in the liquid storage tank. The adhesive curing system also includes: The control module is electrically connected to both the first temperature detection component and the heating component. The control module is used to control the opening and closing of the heating component based on the temperature information detected by the first temperature detection component, so as to maintain the temperature of the heat medium in the liquid storage tank at a preset temperature.

4. The adhesive curing system according to claim 3, characterized in that, The first pump is a bidirectional water pump.

5. The adhesive curing system according to claim 3, characterized in that, The flow channel outlet of the water-cooled plate is connected to the liquid storage tank.

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