Battery potting work cell

Abstract

A battery potting chamber, relating to the field of battery technology, is disclosed. The battery potting chamber includes a shell, a working base plate, an air pressure regulating device, and a potting and dispensing device. A chamber is formed within the shell, and the shell has a door that seals the chamber when closed. The working base plate is located at the bottom of the chamber and supports the battery pack to be potted; the height of the working base plate is locally adjustable. The air pressure regulating device is located within the chamber and is used to change the air pressure within the chamber. The potting and dispensing device is located within the chamber and is used to inject potting material into the battery pack to be potted. This disclosed battery potting chamber is beneficial for improving the potting quality of battery packs.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a battery potting chamber. Background Technology

[0002] Battery potting technology is a key process in battery pack manufacturing. Its core function is to fix the battery modules using potting materials, providing functions such as heat dissipation, moisture protection, shock resistance, and insulation protection. However, a problem exists in the potting process of battery packs: poor potting quality. Summary of the Invention

[0003] This disclosure provides a battery potting chamber, which helps to improve the potting quality of battery packs.

[0004] This disclosure provides a battery filling chamber, comprising:

[0005] The cabin has an outer shell, and a compartment is formed inside the outer shell. The outer shell has a hatch, which seals the compartment when the hatch is closed.

[0006] The working base plate, located at the bottom of the compartment, is used to support the battery pack to be potted. The height of the working base plate can be locally adjusted.

[0007] A pressure regulating device, located inside the cabin, is used to change the air pressure inside the cabin;

[0008] The potting and coating device, located inside the compartment, is used to inject potting material into the battery pack to be potted.

[0009] In one exemplary embodiment of this disclosure, the working base plate has at least two leveling floats, which are supported on different areas of the bottom of the battery pack to be potted; the height of the leveling floats is adjustable.

[0010] In one exemplary embodiment of this disclosure, a locking device is provided on the working base plate; the locking device is used to lock the movement of the battery pack in the horizontal plane.

[0011] In one exemplary embodiment of this disclosure, the battery pack to be potted is supported on a carrier vehicle; a leveling float, a locking device, and the wheels of the carrier vehicle are respectively provided; the locking device is used to lock the wheels of the carrier vehicle to the leveling float respectively.

[0012] In one exemplary embodiment of this disclosure, a visual recognition device is provided on the top and / or sidewall of the compartment. The visual recognition device is used to obtain the form and position tolerances of the upper surface of the liquid cooling plate in the battery pack. The form and position tolerances of the upper surface of the liquid cooling plate include at least one of flatness and profile. The visual recognition device is communicatively connected to a leveling platform. The height of the leveling platform is adjustable according to the form and position tolerances of the upper surface of the liquid cooling plate.

[0013] In one exemplary embodiment of this disclosure, the hatch includes a first hatch and a second hatch disposed opposite to each other at both ends of the outer shell of the cabin; a guide rail is provided on the working base plate connecting the first hatch and the second hatch, the battery pack to be potted is supported on the transport vehicle, and the transport vehicle runs on the guide rail.

[0014] In one exemplary embodiment of this disclosure, the hatch further includes a third hatch, which is disposed on a side wall of the outer shell of the hull adjacent to the first hatch and the second hatch.

[0015] In one exemplary embodiment of this disclosure, a traction control device is provided inside the guide rail; the transport vehicle is connected to the traction control device inside the cavity, and the traction control device is used at least to drive the transport vehicle to leave the cavity through the second door.

[0016] In one exemplary embodiment of this disclosure, the battery filling chamber includes a ventilation duct disposed adjacent to the outer shell of the chamber; the ventilation duct is provided with an inflation duct and an exhaust duct that connect the chamber to the external environment, and external gas enters the chamber through the inflation duct at least and the gas in the chamber is discharged through the exhaust duct at least; the ventilation duct is provided with a gas treatment device, which is located in the gas flow path of the exhaust duct.

[0017] In one exemplary embodiment of this disclosure, the air pressure regulating device includes an air compressor and a vacuum pump; the air compressor is located in the gas flow path of the inflation pipe; the vacuum pump is located in the gas flow path of the exhaust pipe; and the air compressor and the vacuum pump are located inside the ventilation duct.

[0018] In one exemplary embodiment of this disclosure, both the inflation pipe and the deflation pipe are equipped with proportional valves and pressure regulating valves in their gas flow paths to regulate the gas flow rate of the inflation pipe and the deflation pipe.

[0019] In one exemplary embodiment of this disclosure, a temperature and humidity treatment device is provided in the gas flow path of the inflation pipe.

[0020] In one exemplary embodiment of this disclosure, a temperature and humidity treatment device is provided in the gas flow path of the exhaust pipe.

[0021] In one exemplary embodiment of this disclosure, the pressure regulating device includes an overflow valve, which opens when the relative pressure inside the cabin is greater than 45 kPa, allowing the gas inside the cabin to be discharged through the overflow valve.

[0022] The battery potting chamber disclosed herein ensures the battery pack maintains a good level position via a working base plate. This facilitates uniform glue application by the potting and coating device and ensures even distribution of the glue within the battery pack. It avoids uneven foaming rates and inconsistent foaming heights caused by localized glue accumulation, thus improving potting quality. Furthermore, during the foaming process, under the regulation of the air pressure regulating device, the potting material foams at different pressures in different areas along its height direction, resulting in different densities. The battery potting chamber of this disclosure enhances the uniformity of the glue within the battery pack, thereby enabling precise control of the potting density in different potting areas in conjunction with the air pressure regulating device.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0025] Figure 1 This is a schematic diagram of a battery pack.

[0026] Figure 2 This is a schematic diagram of an exemplary embodiment of the battery filling chamber of this disclosure.

[0027] Explanation of reference numerals in the attached figures:

[0028] 101. Battery pack; 1011. Housing shell; 1012. Battery module; 1013. Integrated busbar; 1014. Top cover; 1. Housing shell; 11. First door; 12. Second door; 13. Third door; 2. Working base plate; 3. Transport vehicle; 4. Ventilation duct; 41. Air pressure monitoring sensor. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0030] Unless otherwise specified or stated, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “a,” “an,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “comprising” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to those listed; the terms “first” and “second” are used only as illustrative marks and are not intended to limit the number, importance, or order of the objects.

[0031] Unless otherwise specified, the terms “connection” and “fixed” should be interpreted broadly. For example, “connection” can be a fixed connection, a movable connection, an integral connection, or a detachable connection. It can be a direct connection or an indirect connection through an intermediate medium.

[0032] The phrase "part A is located on part B" as described in this disclosure can mean that part A is directly connected to part B, or that part A is located on part C, and part C is located on part B.

[0033] A "communication connection" can be a wired or a wireless communication connection; it can be direct communication or indirect signal connection through an intermediary medium.

[0034] Furthermore, in this application, directional terms such as "upper / lower" and "top / bottom" are used only to indicate relative positional relationships. For example, for convenience, they are defined based on the actual position and state of the battery filling chamber during operation, or relative to the orientation of the components schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts and can change accordingly depending on the orientation of the components placed in the accompanying drawings.

[0035] This disclosure provides a battery filling chamber, comprising:

[0036] The outer shell 1 has a compartment formed inside it, and the outer shell 1 has a door that seals the compartment when the door is closed.

[0037] The working base plate 2 is located at the bottom of the compartment and is used to support the battery pack 101 to be potted. The height of the working base plate 2 can be locally adjusted.

[0038] A pressure regulating device, located inside the cabin, is used to change the air pressure inside the cabin;

[0039] The potting and coating device, located inside the compartment, is used to inject potting material into the battery pack 101 to be potted.

[0040] For ease of explanation, the potting process of battery pack 101 will be described first, referring to... Figure 1An exploded view of a battery pack 101 is shown. The battery pack 101 may include a housing 1011, a battery module 1012, an integrated busbar 1013, and a top cover 1014. A battery housing cavity is formed within the housing 1011, and the battery module 1012 can be installed within the battery housing cavity. The battery module 1012 includes multiple cells arranged in an array, and an integrated busbar 1013 (Cells Contact System, CCS) is provided on top to realize series and parallel connections between the cells and functions such as battery temperature and voltage sampling. The top cover 1014 can be fastened to the top of the housing to enclose the battery module 1012 within the battery housing cavity.

[0041] After the battery module 1012 is installed into the casing 1011, gaps exist between the battery module 1012 and the side walls of the casing 1011, as well as between the individual battery cells. By filling some or all of these gaps with potting material, allowing it to foam and expand to form a potted section, the overall structural strength and rigidity of the battery pack 101 can be improved. For example, the potting material can include polyurethane foam, silicone foam, epoxy resin foam, etc. After the potting material is poured in, it foams and expands within a certain period of time, filling the corresponding gaps inside the battery pack.

[0042] refer to Figure 2 This diagram illustrates an exemplary embodiment of the battery potting chamber of this disclosure. The battery potting chamber is used to pot the battery pack 101. After the battery module 1012 and integrated busbar 1013 are assembled in the housing 1011, the battery pack 101, in its potting state, can enter the battery potting chamber for potting operations. After potting, the top cover 1014 can be fastened either inside or outside the chamber, completing the battery pack assembly.

[0043] After the battery pack 101 to be potted enters the chamber, the door can be closed to create a sealed environment. The chamber may have an injection station where the battery pack 101 is placed, and potting material is injected into it via a potting and coating device within the chamber. During the foaming process, higher air pressure acting on the upper surface of the potting material inhibits the foaming process, reducing the foaming rate; lower air pressure, on the other hand, promotes the foaming process, increasing the foaming rate. The air pressure within the sealed chamber can be adjusted using an air pressure regulating device, thereby regulating the foaming rate during the potting process.

[0044] For example, after filling the battery pack 101 with potting material, the potting material is first foamed under a lower pressure, resulting in a lower density of the formed potting area compared to the density of foamed adhesive in its naturally foamed state under normal pressure. This increases production speed and reduces the weight of the battery pack 101. When foaming reaches the middle region along the cell height, the chamber pressure can be controlled to rise to normal pressure or a positive pressure higher than normal pressure, resulting in a higher density of the formed potting area compared to the density of foamed adhesive in its naturally foamed state under normal pressure. This improves the strength and hardness of the potting area near the middle of the cell height. Furthermore, after the potting area near the middle of the cell height has foamed, the chamber pressure can be controlled to decrease again, forming a lower density potting area that corresponds to the top region along the cell height, as well as the top of the cell and the top of the integrated busbar 1013. This further increases production speed and reduces the weight of the battery pack 101.

[0045] The battery pack 101 to be potted is placed on the working base plate 2. Before and during the injection of potting material into the battery pack 101 by the potting and coating device, the height of the working base plate 2 can be locally adjusted, so that the battery pack 101 can be tilted in a certain direction or the tilt angle of the battery pack 101 can be adjusted to make it horizontal. For example, due to the production and assembly errors of the battery pack 101 itself, as well as the unevenness or non-levelness of the production environment, the bottom and top surfaces of the battery pack 101 may not be horizontal when it is in the glue injection station. When the potting material is injected, and in the initial stage of initiation, the potting material has strong fluidity. The battery potting working chamber of this disclosure can make the battery pack 101 have a good horizontal state through the working base plate 2, which is conducive to the uniform glue injection of the potting and coating device and the uniform distribution of glue in the battery pack 101. It avoids the problem of uneven initiation rate and inconsistent initiation height caused by local accumulation of glue, thus improving the potting quality. Furthermore, during the foaming process, under the regulation of the air pressure regulating device, the potting material foams in different areas along its height direction at different pressures, resulting in different densities. The battery potting chamber disclosed herein can improve the uniformity of the adhesive within the battery pack 101, thereby facilitating precise control of the potting density in different potting areas in conjunction with the air pressure regulating device.

[0046] For example, the working base plate 2 can be provided with multiple leveling floating platforms. These platforms can support different areas of the bottom of the battery pack 101 to be potted. By adjusting the height of the leveling floating platforms, the horizontal state of the battery pack 101 can be adjusted. For instance, the working base plate 2 can be provided with two leveling floating platforms, respectively supporting the two ends of the bottom of the battery pack 101 along its length. The height of the two leveling floating platforms can be adjusted independently. By changing the difference in height between the two leveling floating platforms, the horizontal tilt angle of the battery pack 101 along its length can be changed. Alternatively, the working base plate 2 can be provided with four leveling floating platforms, respectively supporting the four corners of the bottom of the battery pack 101 along its length and width. The height of the four leveling floating platforms can be adjusted independently, thereby allowing for more precise adjustment of the horizontal state of the battery pack 101 in its length and width directions.

[0047] For example, refer to Figure 2 As shown, the battery pack 101 to be potted is supported by a transport vehicle 3, which can be an Automated Guided Vehicle (AGV). The transport vehicle 3 runs on guide rails, enters the compartment through the hatch, and after reaching the potting station, the wheels of the transport vehicle 3 correspond one-to-one with the leveling floats. For example, the transport vehicle 3 has four wheels, and four leveling floats support the four wheels respectively, so the height of the four wheels of the transport vehicle 3 can be adjusted independently, ensuring that the battery pack 101 has a good level during potting.

[0048] In one exemplary embodiment of this disclosure, the working base plate 2 is provided with a locking device for locking the movement of the battery pack 101 in the horizontal plane. For example, the locking device may include a positioning pin, which, after the battery pack 101 is transferred to the glue injection station, falls manually or automatically to fix the position of the battery pack 101 in the horizontal plane, preventing the battery pack 101 from moving during the adjustment of its horizontal state and the glue injection process. Alternatively, the locking device may include grippers, arranged adjacent to the glue injection station, for example, distributed around the glue injection station, to clamp and fix the battery pack 101 hydraulically, pneumatically, or mechanically, ensuring that the battery pack 101 does not undergo relative displacement with the working base plate 2 in the horizontal plane.

[0049] For example, the battery pack 101 to be potted is mounted on a transfer platform on the transport vehicle 3. The transfer platform may be equipped with positioning pins and / or fixing claws around its perimeter, thereby securing the battery pack 101 to the transfer platform and ensuring that the heavy battery pack 101 does not experience relative displacement with the transport vehicle 3's transfer platform during transport and potting. The locking device may include wheel locking devices, for example, mounted on the working base plate 2 or guide rails, for locking the wheels of the transport vehicle 3 to prevent movement of the transport vehicle 3 during adjusting the level of the battery pack 101 and during potting, such as rolling along the guide rails.

[0050] In one embodiment, the leveling platform, locking device and the wheels of the carrier vehicle 3 are arranged in a one-to-one correspondence; the locking device can lock the wheels of the carrier vehicle 3 to the leveling platform in a one-to-one correspondence, thereby converting the height change of the leveling platform into the tilt angle change of the battery pack 101.

[0051] A visual recognition device may be installed inside the compartment to obtain the dimensional and positional tolerances of the upper surface of the liquid cooling plate inside the battery pack 101. The visual recognition device is communicatively connected to a leveling platform, the height of which is adjustable according to the dimensional and positional tolerances of the upper surface of the liquid cooling plate. For example, the visual recognition device may be located at one or more positions on the top and side walls of the compartment.

[0052] Specifically, the form and position tolerances of the upper surface of the liquid cooling plate may include at least one of flatness and profile. The visual recognition device may include a non-contact 3D visual recognition and ranging system. Based on the actual measurement results of the flatness and profile of the upper surface of the liquid cooling plate in each battery pack 101 to be filled, the visual recognition device can automatically calculate in real time by computer to independently adjust the height of each of the four wheels of the carrier vehicle 3, ensuring that the battery pack 101 has a good level state during filling.

[0053] In one exemplary embodiment of this disclosure, a traction control device is also provided within the guide rail. The traction control device can provide constant-speed and directional traction for the transport vehicle 3. For example, after the transport vehicle 3 enters the compartment, it connects to the traction control device, and the motion control program of the transport vehicle 3 is temporarily suspended, allowing its movement to be taken over by the traction control device. The traction control device can adjust the speed and control the speed of the transport vehicle 3 according to the air pressure and status within the compartment, matching the production cycle.

[0054] The transport vehicle 3 is connected to the traction control device within the chamber. Specifically, the transport vehicle 3 can be connected to the traction control device immediately after the battery pack 101 to be potted is delivered into the chamber and before it reaches the glue injection station; alternatively, the transport vehicle 3 can be connected to the traction control device after it reaches the glue injection station. For example, after the transport vehicle 3 enters the chamber and reaches the glue injection station, the motion control program of the transport vehicle 3 is taken over by the traction control device. After glue injection is completed, the traction control device can pull the transport vehicle 3 and the battery pack 101 on it along the guide rail direction to move according to the set operating program. This achieves a precise and coupled effect between the transport vehicle 3's operating speed and time and the potting process and air pressure regulation process, which is beneficial for improving production cycle time.

[0055] For example, a process of filling a battery in a battery filling chamber includes:

[0056] Step S100: The battery pack 101 to be potted is sent into the compartment via the transport vehicle 3.

[0057] Step S200: The transport vehicle 3 moves to the glue injection station and is locked by the locking device.

[0058] Step S300: Adjust the horizontal state of the battery pack 101 to be potted using the working base plate 2.

[0059] Step S400: Inject potting compound into various parts of the battery pack 101 using a potting and coating device according to a set program.

[0060] Step S500: The transport vehicle 3 is towed out of the compartment by the traction control device.

[0061] The air pressure inside the cabin is regulated by an air pressure regulating device. One air pressure change process can be:

[0062] Before step S400, the cabin pressure is lowered to a first pressure. The first pressure is negative; for example, the relative pressure of the first pressure is no greater than -20 kPa. Relative pressure is the difference between absolute pressure and atmospheric pressure. For example, with atmospheric pressure as a reference of 101.325 kPa, the absolute pressure of the first pressure is no greater than 81.325 kPa. In the following description of embodiments, for ease of description and understanding by those skilled in the art, unless otherwise specified, all pressure parameters in the experiment refer to relative pressure.

[0063] For example, the first air pressure is -40 kPa. Before step S400, the air pressure inside the chamber is reduced to the first air pressure, which allows the potting material to foam under negative pressure from the beginning, realizing rapid foaming and molding of the bottom potting area of ​​the battery pack 101.

[0064] Specifically, in step S100, after the carrier 3 carrying the battery pack 101 to be potted enters the compartment, the compartment door is closed, the air pressure regulating device is activated to start generating a negative pressure environment inside the compartment, and at the same time, the carrier 3 runs along the guide rail to the glue injection station and locks itself after it is in place, thereby improving the efficiency of the potting process.

[0065] When the potting material is launched to a specific altitude, the air pressure inside the cabin is increased to a second pressure. The second pressure can be atmospheric pressure or positive pressure, that is, the relative pressure of the second pressure is not less than 0.

[0066] For example, the second pressure is 40 kPa. The overall height of the potting area is H. When the potting material foams to 0.05H to 0.15H, the air pressure inside the chamber increases to the second pressure, which inhibits the foaming speed of the potting material, forming a potting area with higher density, and improving the strength and stiffness of the corresponding area.

[0067] When the potting material is launched to a specific altitude, it can reduce the air pressure inside the cabin to a third atmosphere. The third atmosphere can be negative or atmospheric pressure, that is, the relative air pressure of the third atmosphere is not greater than 0.

[0068] For example, the third pressure is 0 kPa (normal pressure). The overall height of the potting area is H. When the potting material foams to 0.8-0.9H, the air pressure inside the chamber drops to the third pressure, which increases the foaming speed of the potting material and allows the top potting area to quickly foam and form.

[0069] For example, after the potting material is injected and begins to launch, step S500 can be executed, in which the transport vehicle 3 is moved toward the hatch by the traction control device. By adjusting the speed of the traction control device, the potting material can be launched to 0.8-0.9H just as the transport vehicle 3 reaches the hatch, and the transport vehicle 3 exits the hatch and enters the atmospheric pressure environment. The subsequent launch process can be completed outside the hatch, which helps to improve the efficiency of the potting process.

[0070] For example, refer to Figure 2 As shown, the hatch may include a first hatch 11 and a second hatch 12 disposed opposite each other at both ends of the outer shell 1 of the cabin, with a guide rail connecting the first hatch 11 and the second hatch 12. The first hatch 11 and the second hatch 12 may be directly opposite each other, and the guide rail may be arranged in a straight line; or the first hatch 11 and the second hatch 12 may be staggered, and the guide rail may be curved. The transport vehicle 3 may enter the cabin through the first hatch 11 and leave the cabin through the second hatch 12. For example, the first hatch 11 and the second hatch 12 may be controlled to open simultaneously, so that the next transport vehicle 3 enters the cabin at the same time as the previous transport vehicle 3 leaves the cabin, which is beneficial to improving the working efficiency of the battery filling work cabin.

[0071] refer to Figure 2 As shown, the hatch may also include a third hatch 13, which is located on a side wall of the outer shell 1 adjacent to the first hatch 11 and the second hatch 12. Exemplarily, the first hatch 11 and the second hatch 12 are used for passage of the transport vehicle 3. The opening and closing of the first hatch 11 and the second hatch 12 can be program-controlled via folding or sliding rails, which is beneficial for the flexible construction of the production line and improving production efficiency. The third hatch 13 can be manually verified and opened for personnel entry and exit, facilitating manual troubleshooting and handling when abnormalities occur in the battery filling work compartment.

[0072] For example, the outer shell 1 and the hatches can be made of high-strength, high-rigidity metal or non-metal materials, such as high-strength alloy steel, aluminum alloy, stainless steel, or fiber-reinforced composite materials. All hatches have strong sealing capabilities; for example, the first hatch 11, the second hatch 12, and the third hatch 13 can ensure that the cabin maintains a pressure difference of -40 kPa to +40 kPa with the external environment when closed.

[0073] In one exemplary embodiment of this disclosure, the battery filling chamber includes a ventilation duct 4 disposed adjacent to the outer shell 1. (Reference) Figure 2As shown, the ventilation duct 4 can be installed vertically. The ventilation duct 4 can contain an inflation duct and an exhaust duct connecting the compartment to the external environment. External air can enter the compartment through the inflation duct, and air inside the compartment can be exhausted through the exhaust duct.

[0074] For example, an air compressor can be installed in the gas flow path of the inflation duct. When the air pressure inside the cabin needs to be increased, such as to create a positive pressure environment or to restore from a negative pressure environment, the air compressor compresses the air, draws in outside air, pressurizes it, and sends it into the cabin to increase the cabin pressure. Similarly, a vacuum pump can be installed in the gas flow path of the exhaust duct. When the air pressure inside the cabin needs to be decreased, such as to create a negative pressure environment or to restore from a positive pressure environment, the vacuum pump extracts air from the cabin to reduce the cabin pressure. Both the air compressor and the vacuum pump can be installed within the ventilation duct 4.

[0075] In some exemplary embodiments, a gas temperature and humidity control device can be installed in the gas flow path of the inflation duct. This device can adjust the temperature and humidity of the gas entering the chamber in real time to ensure that the temperature and humidity inside the chamber meet the process requirements. A gas temperature and humidity control device can also be installed in the gas flow path of the exhaust duct, thereby adjusting the temperature and humidity of the gas exiting the chamber in real time, which is beneficial for maintaining a stable external environment. In some exemplary embodiments, a first temperature and humidity control device is installed in the gas flow path of the inflation duct to adjust the temperature and humidity of the gas entering the chamber; a second temperature and humidity control device is installed in the gas flow path of the exhaust duct to adjust the temperature and humidity of the gas exiting the chamber.

[0076] For example, both the inflation and deflation pipes can be equipped with proportional valves and pressure regulating valves in their gas flow paths. The pressure regulating valves can automatically adjust the gas flow rate entering or exiting the chamber according to a set value. When it is necessary to increase the chamber pressure, the intake flow rate can be increased; when it is necessary to decrease the pressure, the exhaust flow rate can be increased to maintain the chamber pressure stable at the target value, achieving precise control of positive or negative pressure. The proportional valves can adjust the gas flow rate proportionally according to the input electrical signal, thereby precisely controlling the pressure changes within the chamber. When used in conjunction with pressure regulating valves, different pressure values ​​can be set and controlled more flexibly and accurately. Safety valve components such as check valves can also be installed in the gas flow paths of the inflation and deflation pipes to protect the gas source, prevent gas backflow, and ensure the safety and normal operation of the equipment.

[0077] In other embodiments, when it is necessary to restore pressure from a negative or positive pressure environment, the gas in the inflation or exhaust pipe may not pass through an air compressor or vacuum pump, but may be directly connected to the outside air to restore pressure by utilizing the pressure difference.

[0078] Furthermore, it should be noted that although this disclosure describes the gas flow path of the battery filling chamber as an inflation pipe and an exhaust pipe, the inflation pipe and the exhaust pipe are distinguished by their functions and gas flow direction. In practical applications, the inflation pipe and the exhaust pipe can also share some or even all of the flow paths. For example, the gas flow direction can be changed by a reversing valve, so that the same pipe can have different functions in different scenarios.

[0079] A gas treatment device can be installed inside the ventilation duct to purify the exhaust gases from inside and outside the cabin. The gas treatment device can be located in the flow path of the exhaust duct. For example, during the potting process, the gases that may be volatilized during the potting and curing of polyurethane foam potting compound may include volatile organic compounds (VOCs), such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polyol volatile substances, and small amounts of organic solvents such as acetone and toluene. The gas treatment device can purify the exhaust gases, which helps improve the environmental friendliness of the equipment and helps protect the health and safety of personnel.

[0080] For example, the gas treatment device may purify the exhaust gas by means of adsorption, such as using an adsorbent with a large specific surface area and porous structure, such as activated carbon or molecular sieve, to adsorb the volatile organic compounds onto its surface.

[0081] Gas treatment devices can purify exhaust gases by means of absorption, such as using water, organic solvents, or surfactant solutions to absorb volatile organic compounds in the gas.

[0082] Gas treatment devices can purify exhaust gases by means of condensation, for example, by installing condensers, compressors, etc., and by reducing the temperature of the exhaust gas and / or increasing the pressure of the exhaust gas, the volatile organic compounds are liquefied, thereby achieving the purpose of separation and purification.

[0083] Gas treatment devices can also purify exhaust gases through catalytic combustion, where, for example, a catalyst causes the volatile organic compounds to undergo oxidation at a relatively low temperature (generally 200–400°C) to produce carbon dioxide and water, thus achieving purification.

[0084] In addition, the gas treatment device can purify the exhaust gas in ways including but not limited to the above embodiments. Depending on the different volatile substances that the potting material may produce, different treatment methods or a combination of treatment methods can be selected.

[0085] In one exemplary embodiment of this disclosure, the pressure regulating device includes an overflow valve that can open when the relative pressure inside the cabin exceeds 45 kPa, allowing gas inside the cabin to escape through the overflow valve. The overflow valve can limit the maximum pressure inside the cabin, preventing excessive pressure from damaging the equipment and battery pack 101.

[0086] In one exemplary embodiment of this disclosure, the air pressure regulating device may further include a plurality of air pressure monitoring sensors 41, which may be arranged inside and outside the cabin and communicate with the main control computer in real time to achieve closed-loop regulation of the air pressure inside the cabin.

[0087] In addition, equipment control panels and alarm devices may be installed outside the compartment, such as on the outer wall of the outer shell 1 and / or on the outer wall of the ventilation duct. For example, the equipment control panel and alarm devices are arranged adjacent to the third door 13 to facilitate operators in monitoring the equipment's operating status and promptly detecting and intervening in alarm signals.

[0088] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A battery filling chamber, characterized in that, include: A cabin shell (1) is provided, a compartment is formed inside the cabin shell (1), and the cabin shell (1) has a door that seals the compartment when the door is closed; A working base plate (2) is located at the bottom of the compartment and is used to support the battery pack (101) to be filled. The height of the working base plate (2) can be locally adjusted. A pressure regulating device is installed inside the cabin to change the air pressure inside the cabin; A potting and coating device, located in the chamber, is used to inject potting material into the battery pack (101) to be potted.

2. The battery potting chamber according to claim 1, characterized in that, The working base plate (2) has no less than two leveling floats, which are supported on different areas of the bottom of the battery pack (101) to be potted; the height of the leveling floats is adjustable.

3. The battery potting chamber according to claim 2, characterized in that, The working base plate (2) is provided with a locking device; the locking device is used to lock the movement of the battery pack (101) in the horizontal plane.

4. The battery potting chamber according to claim 3, characterized in that, The battery pack (101) to be filled is supported on the transport vehicle (3); the leveling platform, the locking device and the wheels of the transport vehicle (3) are arranged in a one-to-one correspondence; the locking device is used to lock the wheels of the transport vehicle (3) to the leveling platform in a one-to-one correspondence.

5. The battery potting chamber according to claim 2, characterized in that, The top and / or sidewalls of the compartment are provided with a visual recognition device, which is used to obtain the form and position tolerance of the upper surface of the liquid cooling plate in the battery pack (101). The form and position tolerance of the upper surface of the liquid cooling plate includes at least one of flatness and profile. The visual recognition device is communicatively connected to the leveling platform, and the height of the leveling platform is adjustable according to the form and position tolerance of the upper surface of the liquid cooling plate.

6. The battery potting chamber according to claim 1, characterized in that, The hatch includes a first hatch (11) and a second hatch (12) disposed opposite to each other at both ends of the outer shell (1) of the cabin; the working base plate (2) is provided with a guide rail connecting the first hatch (11) and the second hatch (12), the battery pack (101) to be filled is supported on the transport vehicle (3), and the transport vehicle (3) runs on the guide rail.

7. The battery potting chamber according to claim 6, characterized in that, The hatch includes a third hatch (13), which is located on a side wall of the outer shell (1) of the cabin adjacent to the first hatch (11) and the second hatch (12).

8. The battery potting chamber according to claim 6, characterized in that, The guide rail is equipped with a traction control device; the transport vehicle (3) is located in the cabin and is connected to the traction control device, which is used at least to drive the transport vehicle (3) to leave the cabin through the second door (12).

9. The battery potting chamber according to claim 1, characterized in that, The battery filling chamber includes a ventilation duct (4) arranged adjacent to the outer shell (1) of the chamber; the ventilation duct (4) is provided with an inflation duct and an exhaust duct that connect the chamber to the external environment, and external gas enters the chamber through the inflation duct at least, and the gas in the chamber is discharged through the exhaust duct at least; the ventilation duct (4) is provided with a gas treatment device, which is located in the gas flow path of the exhaust duct.

10. The battery potting chamber according to claim 9, characterized in that, The air pressure regulating device includes an air compressor and a vacuum pump; the air compressor is located in the gas flow path of the inflation pipe; the vacuum pump is located in the gas flow path of the exhaust pipe; the air compressor and the vacuum pump are located inside the ventilation pipe (4).

11. The battery potting chamber according to claim 9, characterized in that, Both the inflation pipe and the exhaust pipe are equipped with proportional valves and pressure regulating valves in their gas flow paths to regulate the gas flow rate of the inflation pipe and the exhaust pipe.

12. The battery potting chamber according to claim 9, characterized in that, The gas flow path of the inflation pipe is provided with a gas temperature and humidity treatment device; and / or, the gas flow path of the exhaust pipe is provided with a gas temperature and humidity treatment device.

13. The battery potting chamber according to claim 1, characterized in that, The pressure regulating device includes an overflow valve, which opens when the relative pressure inside the cabin is greater than 45 kPa, allowing the gas inside the cabin to be discharged through the overflow valve.

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