Battery device and electric device

Abstract

The utility model relates to the field of batteries, and provides a battery device and a power utilization device, and the battery device comprises a box body, a heat management part, a battery monomer assembly and a foaming filling structure. The box body comprises a surrounding wall and a base plate, and the surrounding wall and the base plate define a containing space. The heat management component is arranged in the box body and is opposite to the substrate at an interval, the peripheral side of the heat management component is connected to the box body, the heat management component divides the accommodating space into a first cavity and a second cavity, and the first cavity is an enclosed space among the heat management component, the enclosure bulkhead and the substrate. The battery monomer assembly is arranged in the second cavity, and the heat management part bears the battery monomer assembly and is connected with the battery monomer assembly in a heat exchange manner. The first cavity is filled with the foaming filling structure. Based on the structure, the foaming filling structure can provide a buffering effect, so that the bottom ball performance of the box body and the battery device is improved, the production difficulty is reduced, the production and manufacturing procedures are simplified, the production efficiency is improved, the weight and the cost of the battery device are reduced, and the lightweight design requirement is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] The battery device generally comprises a box body and a battery monomer assembly accommodated in the box body. The new national standard requires that the box body of the battery device needs to meet the 150J (joule) bottom ball performance. Based on this, in some cases, the bottom ball performance of the box body can be improved by additionally arranging a bottom guard plate at the bottom of the box body along the direction of gravity, but in this way, the processing, transmission, assembly, sealing and other complex processes of the bottom guard plate need to be increased, thereby affecting the production efficiency of the box body, and the weight and cost of the box body are increased. CONTENT OF THE UTILITY MODEL

[0003] The application embodiment provides a battery device, aiming to solve the problems of low production efficiency, high weight and high cost of the box body while meeting the bottom ball performance requirement.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application embodiment is:

[0005] In a first aspect, a battery device is provided, comprising:

[0006] The box body comprises a surrounding wall and a base plate connected to the surrounding wall, and the surrounding wall and the base plate form an accommodation space;

[0007] The heat management component is arranged in the box body and is spaced opposite to the base plate, the peripheral side of the heat management component is connected to the box body, the heat management component divides the accommodation space into a first chamber and a second chamber, and the first chamber is the surrounding space between the heat management component, the surrounding wall and the base plate;

[0008] The battery monomer assembly is arranged in the second chamber, the heat management component carries the battery monomer assembly, and the heat management component is in heat exchangeable connection with the battery monomer assembly;

[0009] The foamed filling structure is filled in the first chamber.

[0010] The battery device provided in this application embodiment, by placing a thermal management component inside the housing and spaced apart from the substrate, and by connecting the periphery of the thermal management component to the housing, allows the thermal management component to be stably installed relative to the walls and the substrate. This enables the thermal management component to divide the accommodating space into a first chamber "located between the thermal management component and the substrate" and a second chamber "located on the side of the thermal management component facing away from the substrate and used to accommodate battery cell modules." Furthermore, by molding and filling a foamed filling structure into the first chamber, a cushioning effect is provided through the foamed filling structure, thereby improving the bottom ball performance of the housing and the battery device. Moreover, the foamed filling structure can be automatically produced based on online foaming technology; since the housing does not need to have an additional bottom protective plate to improve bottom ball performance, complex processes such as bottom protective plate processing, transportation, assembly, and sealing can be eliminated; and since the housing does not need to have increased thickness and strength to improve bottom ball performance, the molding difficulty of the housing can be reduced; thus, production difficulty is reduced, manufacturing processes are simplified, and production efficiency is improved. Furthermore, the foam filling structure is characterized by low cost and light weight, thus reducing the weight and cost of the battery device and meeting the requirements of lightweight design. In addition, while filling the first chamber, the foam filling structure also bonds to at least part of the walls of the first chamber, enabling the casing and thermal management components to be firmly integrated, thereby improving the integration and enhancing the mechanical properties (such as mechanical strength, impact resistance, stability, and reliability) and thermal insulation performance of the battery device. It also reduces abnormal noise issues during transportation and use.

[0011] In some embodiments, at least one of the thermal management component and the housing is provided with a gating hole, and / or a gating hole is formed between the thermal management component and the housing;

[0012] At least one of the thermal management component and the housing is provided with an exhaust port, and / or an exhaust port is formed between the thermal management component and the housing;

[0013] Both the pouring hole and the vent are configured to connect the first chamber to the outside of the first chamber, and the pouring hole is used to inject the foam material that forms the foamed filling structure.

[0014] By adopting the above scheme, a stable and precise injection channel for the foaming material can be provided through the pouring hole, facilitating the smooth and unobstructed entry of the foaming material into the relatively enclosed first chamber. This approach is compatible with online foaming technology, facilitates automated production, and improves production efficiency. Furthermore, the vent outlet creates a relatively low-pressure area at its location, using the pressure difference to guide the foaming material to automatically flow towards the lower pressure area within the first chamber. This allows for control of the foaming material's flow direction, reduces localized accumulation or flow obstruction, and promotes full flow of the foaming material within the first chamber. Furthermore, during the foaming reaction and curing process of the foamed material in the first chamber, a large amount of gas is generated during the foaming reaction. Since the expansion and filling of the foamed material requires space within the first chamber, the exhaust port facilitates the timely removal of gas from the first chamber. This reduces the risk of gas stagnation leading to excessive voids in the foamed filling structure and weakening its strength. It also reduces the risk of gas pressure hindering the flow of the foamed material and preventing the filling of the first chamber. This promotes the full filling of the first chamber, maintains and improves the density, stability, and reliability of the foamed filling structure, maintains and improves the bottom ball performance, mechanical properties, and thermal insulation performance of the casing and battery device, adapts to online foaming technology and automated production requirements, and maintains and improves production quality consistency.

[0015] In some embodiments, the pouring hole is closer to the center of the first chamber than the vent.

[0016] By adopting the above scheme, and by placing the pouring hole closer to the center of the first chamber than the vent, the distance from the pouring hole to each side of the first chamber can be made relatively balanced. By placing the vent further away from the center of the first chamber than the pouring hole, the air pressure in the area far from the center of the first chamber can be lower than the air pressure in the area near the center of the first chamber, thus creating a pressure gradient guidance of "high air pressure in the center and low air pressure on the periphery". Based on this, after the foaming material is injected through the pouring hole, it can be made to flow radially and uniformly from the pouring hole to the surrounding vents. This allows the foaming material to diffuse evenly and flow smoothly from the center to the periphery within the first chamber, reducing local accumulation or flow obstruction. Furthermore, compared to a scheme where the foaming material flows in one direction (e.g., the pouring hole is located on one side and the vents are located on the other side), the radial flow path allows the foaming material to diffuse in multiple directions simultaneously, shortening the flow distance and reducing the time required for the foaming material to cover the first chamber. This enables the foaming material to quickly, reliably, and fully fill the first chamber within the foaming reaction time. Consequently, it improves the uniformity, sufficiency, and density of the foam filling structure within the first chamber, increases the filling efficiency of the foam filling structure, improves production cycle time and efficiency, and is suitable for mass automated production.

[0017] In some embodiments, the battery device includes a first beam disposed in a second chamber and separating the second chamber;

[0018] Multiple battery cell modules are provided, and the multiple battery cell modules are distributed on both sides of the first beam perpendicular to its extension direction;

[0019] There are multiple pouring holes, which are distributed on both sides of the first beam perpendicular to its extension direction;

[0020] Multiple exhaust ports are provided, and the multiple exhaust ports are distributed on both sides of the first beam perpendicular to its extension direction.

[0021] By adopting the above scheme, multiple pouring holes can be distributed on both sides of the first beam perpendicular to its extension direction, using the first beam as a boundary. This allows the foaming material to be injected into the two sections of the first chamber located on either side of the first beam perpendicular to its extension direction via the pouring holes in those sections, facilitating uniform diffusion of the foaming material in the corresponding sections. Furthermore, the design of multiple pouring holes can balance the air pressure distribution within the first chamber, reducing local accumulation or flow obstruction caused by excessive concentration of injection volume from a single pouring hole. This improves the uniformity of diffusion and filling of the foaming material in different areas of the first chamber, enhancing the uniformity, sufficiency, and density of the foam filling structure within the first chamber. Moreover, the design of multiple pouring holes reduces the impact of blockage or abnormal injection from a single pouring hole on the filling effect, thereby maintaining and improving the stability of the production process and the consistency of production quality.

[0022] By adopting the above scheme, multiple exhaust ports can be set on both sides of the first beam perpendicular to its extension direction, with the first beam as the boundary. This allows the first chamber, located in two sections on either side of the first beam perpendicular to its extension direction, to discharge gas promptly through the exhaust ports located in those sections. Furthermore, the design of multiple exhaust ports increases the number of exhaust holes and improves the exhaust rate. This reduces the risk of gas stagnation leading to excessive voids in the foamed filling structure and weakening its strength. It also reduces the risk of gas volume pressure hindering the flow of foam material and the filling of the first chamber. This promotes the full filling of the first chamber by the foamed filling structure, maintains and improves the density, stability, and reliability of the foamed filling structure, maintains and improves the bottom ball performance, mechanical properties, and thermal insulation performance of the casing and battery device, adapts to online foaming technology and automated production requirements, and maintains and improves the consistency of production quality.

[0023] In some embodiments, up to three pouring holes are provided.

[0024] By adopting the above solution and setting a maximum of three pouring holes, the total time for the foaming equipment to switch holes and complete full injection does not exceed the foaming reaction time. All pouring hole injection operations can be completed by a single foaming equipment within the foaming reaction time (i.e., before the foam material cures). This largely avoids the problem of some foam material failing to cure and fully fill the first chamber due to excessive time spent switching holes. It promotes uniform flow and complete filling of the first chamber by the foam material. Furthermore, it eliminates the need for additional foaming equipment to accommodate more holes, reducing equipment investment costs. Thus, it balances foam filling quality, production efficiency, and cost control, enabling stable and feasible online foaming processes. Moreover, it reduces the impact of openings on the structure of the housing or thermal management components, maintaining their structural reliability.

[0025] In some embodiments, the pouring hole is provided through the thermal management component and avoids the flow channel of the thermal management component.

[0026] By adopting the above-described scheme, and by ensuring that the pouring hole passes through the thermal management component while avoiding the flow channel, the foaming material can be smoothly injected into the first chamber through the pouring hole of the thermal management component. This also largely avoids the pouring hole disrupting the integrity of the flow channel and affecting the thermal management function of the thermal management component. Furthermore, since the pouring hole connects the first and second chambers, it does not affect the airtightness of the housing after foaming, eliminating the need for an additional sealing process. Compared to schemes where the pouring hole is located within the housing and requires an additional sealing process, this embodiment reduces processing steps, simplifies the production process, and improves production efficiency. It also reduces the consumption of sealing materials, lowering costs, and reduces the risk of seal failure, thus achieving a balance between functionality (e.g., thermal management performance) and process economy.

[0027] In some embodiments, the enclosure includes two first side portions disposed opposite to each other along a first direction, and two support portions respectively connected to the inner sides of the two first side portions, the support portions extending along a second direction perpendicular to the first direction;

[0028] The thermal management component includes a main body and a first connecting part connected to the side of the main body corresponding to the support part, the first connecting part being connected to the side of the support part facing away from the substrate.

[0029] By adopting the above solution, and by connecting the first connecting portions of the thermal management component on two opposite sides along the first direction to the supporting portions of the two opposite inner walls of the enclosure along the first direction, the thermal management component can be stably installed relative to the enclosure and the substrate. The thermal management component can be supported and raised by the two supporting portions, ensuring a smooth, spaced relative position to the substrate. This improves the connection stability, reliability, and robustness between the thermal management component and the housing, facilitating the stable and reliable division of the accommodating space into a first chamber and a second chamber. Furthermore, because the connection between the thermal management component and the housing is peripheral, avoiding a connection structure in the center of the first chamber, the first chamber remains empty before the foaming material is filled. This facilitates the smooth flow of the foaming material within the first chamber, enabling the foaming reaction and curing process. Furthermore, based on the multi-directional connection between the thermal management components and the housing, and combined with the adhesive effect of the foam filling structure, the housing, thermal management components, and substrate can be tightly connected to form a stable overall structure, thereby improving the mechanical and thermal insulation performance of the battery device and reducing abnormal noise problems during transportation and use.

[0030] In some embodiments, the first connecting portion is connected to the support portion by a first fastener, and the first connecting portion is recessed relative to the main body portion toward the support portion, so that the first fastener does not protrude from the surface of the main body portion facing away from the substrate.

[0031] By adopting the above solution, and by making the first connecting portion recessed relative to the main body towards the support portion, the side of the first connecting portion facing away from the support portion is lower than the surface of the main body facing away from the substrate. Furthermore, if the first connecting portion is connected and fixed to the support portion via a first fastener, the portion of the first fastener located on the side of the first connecting portion facing away from the support portion can be accommodated between the side of the first connecting portion facing away from the support portion and the surface of the main body facing away from the substrate, without protruding from the surface of the main body facing away from the substrate. This ensures that the flat and close contact between the thermal management component and the battery cell assembly is not affected, which is beneficial for improving the thermal conduction effect and efficiency between the thermal management component and the battery cell assembly.

[0032] In some embodiments, the support portion has a first exhaust port in the area away from the first connection portion, and the first exhaust port connects the first chamber and the second chamber.

[0033] By adopting the above solution, and by placing the first exhaust port in the area of ​​the support portion that avoids the first connecting portion, on the one hand, the first connecting portion can be basically avoided from blocking the first exhaust port and affecting the exhaust of the first exhaust port. On the other hand, the first exhaust port can conform to the design of "connecting the first chamber to the periphery of the first chamber" and meet the air pressure gradient requirements of "peripheral exhaust". This is conducive to guiding the foamed material to flow and diffuse to the periphery of the first chamber (especially the side of the first chamber along the first direction), which is conducive to promoting the smooth discharge of gas inside the first chamber, which is conducive to promoting the full filling of the first chamber by the foamed filling structure, which is conducive to reducing the risk of gas volume pressure hindering the flow of foamed material and hindering the filling of the first chamber by the foamed filling structure, and which is conducive to reducing the risk of the foamed filling structure forming too many voids and resulting in weak strength of the foamed filling structure. On the other hand, the first exhaust port can be connected to the first chamber and the second chamber. After foaming, the first exhaust port will not affect the airtightness of the box. There is no need to add an additional sealing process for the first exhaust port. Compared with the solution where the first exhaust port is connected to the outside of the box, this embodiment can reduce the sealing process, simplify the production process and improve production efficiency, reduce the consumption of sealing materials and reduce costs, reduce the risk of sealing failure, and adapt to the needs of automated production.

[0034] In some embodiments, the battery device includes a second beam disposed in a second chamber, the second beam being located on one side of the battery cell assembly and abutting against the battery cell assembly, and the second beam being connected to a substrate;

[0035] The thermal management component includes a main body and a second connecting part connected to the side of the main body corresponding to the second beam. The second connecting part is inserted between the second beam and the substrate and is disposed away from the connection between the second beam and the substrate.

[0036] By adopting the above solution, and by inserting the second connecting part between the second beam and the substrate, while avoiding the connection point between the second beam and the substrate, on the one hand, the second beam can enhance the fixing effect on the thermal management component, thereby stabilizing and securing the installation position and state of the thermal management component relative to the housing, and improving the connection stability, reliability, and stability between the thermal management component and the housing. On the other hand, it ensures that the second connecting part does not interfere with the connection between the second beam and the substrate, and does not hinder the reinforcement effect of the second beam on the housing, thus contributing to improving the overall structural stability, reliability, and mechanical performance of the housing and battery device.

[0037] In some embodiments, the second connecting portion is connected to the substrate.

[0038] By adopting the above solution, the connection between the second connecting part and the substrate can facilitate the connection and fixation of the thermal management component to the corresponding side of the enclosure along the circumferential direction. This stabilizes and secures the installation position and state of the thermal management component relative to the enclosure and the substrate, improving the connection stability, reliability, and robustness between the thermal management component and the enclosure. Furthermore, since the connection between the thermal management component and the enclosure is peripheral, avoiding the connection structure in the middle of the first chamber, the first chamber can be empty before the foaming material is filled. This facilitates the smooth flow of the foaming material within the first chamber, enabling the foaming reaction to complete and the material to solidify.

[0039] In some embodiments, a plurality of second connecting portions are provided, and the plurality of second connecting portions are spaced apart on the side of the main body corresponding to the second beam. A second exhaust port is formed between two adjacent second connecting portions, and the second exhaust port connects the first chamber and the second chamber.

[0040] By adopting the above scheme, by forming a second exhaust port between two adjacent second connecting parts to connect the first chamber to the second chamber, on the one hand, the second exhaust port can fit the design of "connecting the first chamber to the periphery of the first chamber" and can fit the pressure gradient requirement of "peripheral exhaust". This is conducive to guiding the foamed material to flow and diffuse to the periphery of the first chamber (especially the side of the first chamber along the second direction), which is conducive to promoting the smooth discharge of gas inside the first chamber, which is conducive to promoting the full filling of the first chamber by the foamed filling structure, which is conducive to reducing the risk of gas volume pressure hindering the flow of foamed material and hindering the filling of the first chamber by the foamed filling structure, and which is conducive to reducing the risk of the foamed filling structure forming too many voids and resulting in weak strength of the foamed filling structure. On the other hand, the second exhaust port can connect the first chamber and the second chamber. After foaming, the second exhaust port will not affect the airtightness of the box. There is no need to add an additional sealing process for the second exhaust port. Compared with the solution where the second exhaust port is connected to the outside of the box, this embodiment can reduce the sealing process, simplify the production process and improve production efficiency, reduce the consumption of sealing materials and reduce costs, reduce the risk of sealing failure, and adapt to the needs of automated production.

[0041] In some embodiments, the thermal management component includes a third connecting portion recessed on the side of the main body away from the second beam, the third connecting portion being connected to the substrate by a second fastener, the second fastener not protruding from the surface of the main body facing away from the substrate.

[0042] By adopting the above solution, the connection between the third connecting part and the substrate can facilitate the connection and fixation of the thermal management component to the corresponding side of the enclosure along the circumference. This stabilizes and secures the installation position and state of the thermal management component relative to the enclosure and the substrate, improving the connection stability, reliability, and robustness between the thermal management component and the enclosure. Furthermore, since the connection between the thermal management component and the enclosure is peripheral, avoiding the connection structure in the middle of the first chamber, the first chamber can be empty before the foaming material is filled. This facilitates the smooth flow of the foaming material within the first chamber, enabling the foaming reaction to complete and the material to solidify.

[0043] By adopting the above solution, on the basis that the side of the third connecting part facing away from the substrate is lower than the surface of the main body facing away from the substrate, if the third connecting part is connected and fixed to the substrate by the second fastener, the part of the second fastener located on the side of the third connecting part facing away from the substrate can be accommodated between the side of the third connecting part facing away from the substrate and the surface of the main body facing away from the substrate, without protruding from the surface of the main body facing away from the substrate. This does not affect the flat contact and bonding contact between the thermal management component and the battery cell assembly, which is beneficial to improving the thermal conduction effect and thermal conduction efficiency between the thermal management component and the battery cell assembly.

[0044] In some embodiments, the foam-filled structure is bonded to the walls of the first chamber.

[0045] By adopting the above solution, and by bonding the foam filling structure to the walls of the first chamber in a conformal manner, the foam filling structure can be precisely filled and shaped according to the actual contours of the walls of the first chamber. Based on this, the foam filling structure has extremely high shape adaptability, which can promote the formation of a gapless connection between the foam filling structure and the walls of the first chamber, which can basically eliminate gaps in the cavity, reduce structural weak points caused by loose bonding, significantly improve connection stability, connection tightness, and connection reliability, strengthen the integration of the housing, thermal management components and foam filling structure, significantly enhance the mechanical properties, impact resistance, deformation resistance and thermal insulation performance of the overall structure, and reduce abnormal noise problems of battery devices during transportation and use.

[0046] In some embodiments, the thermal management component includes a first plate and a second plate that overlap each other, the first plate and the second plate being stacked in a direction close to the first chamber, a portion of the second plate being protruding toward the first chamber to form a protrusion, and the protrusion forming a flow channel toward the interior of the first plate.

[0047] By adopting the above solution, by setting a protrusion on the side of the thermal management component facing the first chamber, the protrusion of the thermal management component can be embedded in the foam filling structure to form a physical interlock, thereby significantly increasing the connection area and connection depth between the thermal management component and the foam filling structure. Combined with the design of the foam filling structure and the walls of the first chamber, the integration of the thermal management component, the foam filling structure and the housing can be strengthened, which can enhance the mechanical properties, impact resistance, deformation resistance and heat insulation performance of the overall structure, and reduce the abnormal noise problem of the battery device during transportation and use. Furthermore, the protrusion facilitates the flow channel design of the thermal management component, allowing the flow channel to be located within the protrusion to maintain its thermal management performance and efficiency. This design also helps to ensure that the side of the thermal management component facing away from the first chamber is relatively flat, thus facilitating smooth and close contact between the thermal management component and the battery cell assembly via this side, which improves the heat transfer effect and efficiency between the thermal management component and the battery cell assembly. In addition, the protrusion and its flow channel do not need to occupy the space of the second chamber, thereby maintaining and expanding the effective space within the housing that can accommodate the battery cell assembly, and maintaining and improving the energy density of the battery device.

[0048] In some embodiments, the substrate has reinforcing ribs on the side facing the first chamber.

[0049] By adopting the above-mentioned solution, and by setting reinforcing ribs on the side of the substrate facing the first chamber, the structural strength and deformation resistance of the substrate itself can be directly improved through the reinforcing ribs. This reduces the risk of the substrate denting or breaking due to bottom impact or heavy pressure, and can enhance the overall impact resistance of the battery device in conjunction with the buffering and energy absorption effect of the foam filling structure. On the other hand, the reinforcing ribs can create an uneven contour on the corresponding wall of the first chamber, which facilitates the foam filling structure to tightly interlock with the reinforcing ribs through conformal bonding. This increases the connection area between the substrate and the foam filling structure, enhances the tightness and firmness of the connection between the substrate and the foam filling structure, strengthens the integration of the housing, the foam filling structure, and the thermal management components, and enhances the overall mechanical properties, impact resistance, deformation resistance, and thermal insulation performance of the structure. This can also reduce abnormal noise problems during the transportation and use of the battery device.

[0050] In some embodiments, the outer surfaces of both the housing and the thermal management component located outside the first chamber are provided with a protective layer, which includes at least one of an electrophoretic layer, a powder coating layer, and a spray coating layer.

[0051] By adopting the above solution, the surfaces of the housing and thermal management components located outside the first chamber can be jointly protected while the housing and thermal management components are assembled and fixed, forming a protective layer comprising at least one of electrophoretic layer, powder coating layer, and spray coating layer. Based on this, the protective layer can effectively isolate external moisture, dust, corrosive substances, etc., reducing the risk of corrosion to the outer surfaces of both the housing and thermal management components, thereby improving the reliability of the battery device and extending its service life. Furthermore, in the production process, there is no need to separately protect the housing and thermal management components, simplifying the protection and production processes and improving production efficiency. Moreover, integrated protection reduces equipment usage and manual operation costs, allowing for cost control while maintaining the protective effect, thus reducing overall costs.

[0052] In some embodiments, the enclosure and the substrate are integrally stamped structures.

[0053] By adopting the above-described solution, which integrates the enclosure and the substrate through integral stamping, the complex manufacturing processes of the enclosure can be reduced, the draft angle and forming difficulty of the enclosure can be lowered, and the processing accuracy and structural consistency of the enclosure and the substrate can be maintained and improved, making it suitable for mass production. Furthermore, compared to existing solutions that "improve the bottom ball performance by increasing the thickness and strength of the enclosure," the enclosure in this embodiment does not require a large draft angle. Since the enclosure and thermal management components can be integrated through a foam filling structure, the integration is improved, thereby maintaining and expanding the effective space within the enclosure for accommodating individual battery cells, and maintaining and improving the energy density of the battery device.

[0054] Secondly, an electrical device is provided, including the battery device provided in the embodiments of this application.

[0055] By adopting the above solution, the electrical device can improve its bottom ball performance, usage performance, usage reliability, and service life by applying the battery device provided in the embodiments of this application. Attached Figure Description

[0056] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0058] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

[0059] Figure 3 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0060] Figure 4 for Figure 3 A top view of the provided battery device;

[0061] Figure 5 for Figure 4 The provided sectional view along AA;

[0062] Figure 6 for Figure 5 A magnified view of region B is provided.

[0063] Figure 7 for Figure 3 A partial structural diagram of the provided battery device;

[0064] Figure 8 for Figure 7 A magnified view of region C is provided.

[0065] Figure 9 for Figure 7 An exploded view of the provided battery device;

[0066] Figure 10 for Figure 7 A magnified view of region D is provided.

[0067] The following are the labeling elements in the figure:

[0068] 1-Battery unit, 2-Controller, 3-Motor, 10-Battery cell assembly, 20-Casing, 21-First part, 22-Second part, 23-Enclosure, 231-First side, 232-Support, 24-Base plate, 241-Reinforcing rib, 25-Accommodation space, 251-First chamber, 252-Second chamber, 26-Exhaust port, 26a-First exhaust port, 26b-Second exhaust port, 30-Thermal management component, 31-First plate, 32-Second plate, 321-Protrusion, 33-Flow channel, 34-Gating hole, 35-Main body, 36-First connecting part, 37-Second connecting part, 38-Third connecting part, 39-Positioning hole, 40-Foam filling structure, 50-Fixing strip, 60-First fastener, 70-Second fastener, 80-First beam, 90-Second beam, x-First direction, y-Second direction. Detailed Implementation

[0069] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0070] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0072] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] A battery pack is a modular structure comprising at least two individual battery cells to provide higher voltage and capacity; it can be a battery module, battery assembly, or battery pack. A battery pack typically includes a housing and the individual battery cells housed within it. The new national standard "Safety Requirements for Power Batteries for Electric Vehicles" (GB 38031-2025) requires the battery pack housing to meet a bottom impact performance requirement of 150J (joules). Specifically, in a bottom impact test, a 10kg steel hemisphere with a diameter of 30mm is used to impact the battery pack housing at three points along the direction of gravity with an energy of (150J±3J). The battery pack must withstand this impact without leakage, housing rupture, fire, or explosion.

[0074] Therefore, in some cases, a bottom protective plate can be added to the bottom of the enclosure along the direction of gravity to improve its bottom spherical bearing capacity. However, this increases the complexity of processing, transporting, assembling, and sealing the bottom protective plate, affecting production efficiency and increasing weight and cost. In other cases, the bottom spherical bearing capacity can be improved by increasing the thickness and strength of the enclosure. However, this makes the enclosure more difficult to mold, affecting production efficiency and increasing weight and cost.

[0075] Therefore, some embodiments of this application provide a battery device that, by placing a thermal management component within a housing and spaced apart from a substrate, and by connecting the periphery of the thermal management component to the housing, allows the thermal management component to be stably positioned and installed relative to the walls and substrate. This enables the thermal management component to divide the accommodating space into a first chamber "located between the thermal management component and the substrate" and a second chamber "located on the side of the thermal management component facing away from the substrate and used to accommodate battery cell modules." Furthermore, by molding and filling a foamed filling structure into the first chamber, a cushioning effect is provided through the foamed filling structure, thereby improving the bottom ball performance of the housing and the battery device. Moreover, the foamed filling structure can be automatically produced based on online foaming technology; since the housing does not require an additional bottom protective plate to improve bottom ball performance, complex processes such as bottom protective plate processing, transportation, assembly, and sealing are eliminated; and since the housing does not require increased thickness and strength to improve bottom ball performance, the molding difficulty of the housing is reduced; thus, production difficulty is reduced, manufacturing processes are simplified, and production efficiency is improved. Furthermore, the foam filling structure is characterized by low cost and light weight, thus reducing the weight and cost of the battery device and meeting the requirements of lightweight design. In addition, while filling the first chamber, the foam filling structure also bonds to at least part of the walls of the first chamber, enabling the casing and thermal management components to be firmly integrated, thereby improving the integration and enhancing the mechanical properties (such as mechanical strength, impact resistance, stability, and reliability) and thermal insulation performance of the battery device. It also reduces abnormal noise issues during transportation and use.

[0076] The battery devices disclosed in this application can be used in electrical devices that use the battery device as a power source, or in various energy storage systems that use the battery device as an energy storage element. Electrical devices can be, but are not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0077] To illustrate the technical solution provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments, taking "an electrical device as a vehicle" as an example.

[0078] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 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 1 is installed inside the vehicle, and the battery device 1 can be located at the bottom, front, or rear of the vehicle. The battery device 1 is used to supply power to the vehicle; for example, the battery device 1 can serve as the vehicle's operating power source. The vehicle may also include a controller 2 and a motor 3. The controller 2 is used to control the battery device 1 to supply power to the motor 3, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0079] In some embodiments of this application, the battery device 1 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0080] Please see Figure 2 , Figure 2 This is an exploded view of a battery device 1 provided in some embodiments of this application. The battery device 1 includes a battery cell assembly 10 and a housing 20, wherein the battery cell assembly 10 is housed within the housing 20.

[0081] The housing 20 provides a space 25 for housing components such as the battery cell assembly 10. The housing 20 can protect the battery cell assembly 10 and other components housed within it from dust, water, and dirt, and can reduce the impact of external liquids or other foreign objects on the effectiveness and performance of the battery cell assembly 10 and other components, thereby effectively extending the service life of the battery device 1.

[0082] The housing 20 can adopt various structures. In some embodiments, the housing 20 may include a first part 21 and a second part 22, which overlap each other, and together define a receiving space 25 for accommodating the battery cell assembly 10. The second part 22 may be a hollow structure with one end open, and the first part 21 may be a plate-like structure, with the first part 21 covering the open side of the second part 22 so that the first part 21 and the second part 22 together define the receiving space 25; the first part 21 and the second part 22 may also be hollow structures with one side open, with the open side of the first part 21 covering the open side of the second part 22.

[0083] The box 20 can be of various shapes, such as a cylinder or a cuboid.

[0084] The enclosure 20 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0085] In the battery device 1, there may be one battery cell assembly 10 or at least two battery cell assemblies 10. When there are at least two battery cell assemblies 10, the at least two battery cell assemblies 10 may be connected in series, in parallel, or in a mixed manner. A mixed manner means that at least two battery cell assemblies 10 are connected in both series and parallel.

[0086] The battery cell assembly 10 may include at least two battery cells. These at least two battery cells can be directly connected in series, parallel, or a combination thereof, and then the assembly of the at least two battery cells is housed within the casing 20. The battery cells may be lithium-ion rechargeable battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc. The battery cells may be cylindrical, flat, cuboid, or other shapes, etc. The battery cells may employ different packaging methods to form cylindrical battery cells, square battery cells, or pouch battery cells, etc.

[0087] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6Some embodiments of this application provide a battery device 1, including a housing 20, a thermal management component 30, a battery cell assembly, and a foam filling structure 40. The housing 20 includes a surrounding wall 23 and a substrate 24 connected to the surrounding wall 23, the surrounding wall 23 and the substrate 24 enclosing a receiving space 25. The thermal management component 30 is disposed within the housing 20 and spaced apart from the substrate 24. The peripheral side of the thermal management component 30 is connected to the housing 20. The thermal management component 30 divides the receiving space 25 into a first chamber 251 and a second chamber 252. The first chamber 251 is the enclosed space between the thermal management component 30, the surrounding wall 23, and the substrate 24. The battery cell assembly is disposed within the second chamber 252. The thermal management component 30 carries the battery cell assembly and is thermally connected to the battery cell assembly. The foam filling structure 40 fills the first chamber 251.

[0088] It should be noted that the housing 20 is the basic load-bearing structure of the battery device 1. The housing 20 includes a surrounding wall 23 and a base plate 24. The surrounding wall 23 has two openings arranged opposite each other, and the base plate 24 covers one opening of the surrounding wall 23 and is connected and fixed to the surrounding wall 23. The surrounding wall 23 and the base plate 24 together define a receiving space 25 for accommodating the battery cell assembly and the thermal management component 30. The specific shape of the surrounding wall 23 can be designed according to the actual application scenario, for example, it can be a regular or irregular three-dimensional frame structure such as a rectangle or polygon, and the specific shape of the base plate 24 can be adapted to the specific shape of the surrounding wall 23. The specific materials of the surrounding wall 23 and the base plate 24 can be set as needed, for example, materials with certain strength and corrosion resistance (such as metal alloys (such as sheet metal)) can be selected to maintain the overall structural stability of the housing 20. The surrounding wall 23 and the base plate 24 can be integrally formed and connected, or they can be connected separately (such as by welding).

[0089] The thermal management component 30 is a key component for achieving thermal regulation of the battery device 1. The thermal management component 30 is located inside the housing 20. The thermal management component 30 is peripherally connected to the housing 20, meaning it is connected to the housing 20 on multiple circumferential sides (e.g., the enclosure 23 or the substrate 24), ensuring a stable installation position and state of the thermal management component 30 relative to the enclosure 23 and the substrate 24. This allows the thermal management component 30 and the substrate 24 to be spaced apart and aligned, enabling the thermal management component 30, the enclosure 23, and the substrate 24 to collectively enclose a relatively closed first chamber 251. The thermal management component 30 can divide the accommodating space 25 into the first chamber 251 and a second chamber 252 located on the side of the thermal management component 30 facing away from the substrate 24 and used to accommodate individual battery cells. The thermal management component 30 and the housing 20 can be connected and fixed using, but not limited to, methods such as bonding, welding, riveting, screw fastening, and snap-fitting.

[0090] The battery cell assembly is disposed within the second chamber 252 and is supported and carried by the thermal management component 30. The thermal management component 30 is heat-exchangeably connected to the battery cell assembly, enabling heat exchange between the thermal management component 30 and the battery cell assembly to regulate the temperature of the battery cell. In some embodiments, the thermal management component 30 includes a first plate 31 and a second plate 32 that are separately formed and overlap each other. At least one of the first plate 31 and the second plate 32 is provided with a flow channel 33. The flow channel 33 can extend in a straight line, bend, or zigzag. The width, extension path, etc., of the flow channel 33 can be flexibly set as needed. The flow channel 33 can be used to flow a heat exchange fluid, which can be used to regulate the temperature of the battery cell. The heat exchange fluid can be a liquid or a gas, and can be, but is not limited to, water, a mixture of water and ethylene glycol, or air. The first plate 31 and the second plate 32 can be formed into plates by methods such as hot rolling, but are not limited to this. At least one of the first plate 31 and the second plate 32 can be formed into the flow channel 33 by methods such as stamping or blow forming, but are not limited to this. The connection between the first plate 31 and the second plate 32 can be made by methods such as welding, and the welding method can be made by methods such as brazing or laser welding, but are not limited to this.

[0091] The foam filling structure 40 is filled into the first chamber 251. The foam filling structure 40 can be formed and filled into the first chamber 251 using online foaming technology. Online foaming technology is an integrated process technology in the product manufacturing process, in which foaming material is injected on-site and allowed to flow in a specific space (the first chamber 251 in this embodiment) to complete the foaming reaction and curing. Since the thermal management component 30 and the housing 20 are connected peripherally without a central connection structure, the first chamber 251 is empty before the foaming material is filled. After the foaming material is injected into the first chamber 251, it facilitates the smooth flow of the foaming material within the first chamber 251, completing the foaming reaction and curing. Based on online foaming technology, the foaming process of the foam filling structure 40 can be integrated with the overall assembly or molding process of the product, omitting the intermediate step of "reassembly of prefabricated foamed parts" in traditional foaming processes, thereby improving production efficiency and achieving structural integration. Based on online foaming technology, the foam filling structure 40 fills the first chamber 251 and adheres to at least a portion of the walls of the first chamber 251. The walls of the first chamber 251 include the side of the thermal management component 30 facing the substrate 24, the side of the substrate 24 facing the thermal management component 30, and the portion of the inner peripheral wall of the surrounding wall 23 located between the thermal management component 30 and the substrate 24. The foaming material used in the foam filling structure 40 can be foamed online at room temperature. The foaming time and curing time can be adjusted according to requirements. The foam filling structure 40, after curing, has a loose foam form with pores, a fluffy and relatively hard texture, and lacks the elasticity of elastic rubber. The foaming material can be, but is not limited to, polyurethane (PU), reactive polyurethane (RPU), polyethylene (PE), expandable polystyrene (EPS), expanded polypropylene (EPP), etc.

[0092] In summary, the battery device 1 provided in this application embodiment, by placing the thermal management component 30 within the housing 20 and spaced apart from the substrate 24, and by connecting the peripheral side of the thermal management component 30 to the housing 20, allows the thermal management component 30 to be stably installed relative to the enclosure wall 23 and the substrate 24. This enables the thermal management component 30 to divide the accommodating space 25 into a first chamber 251 "located between the thermal management component 30 and the substrate 24," and a second chamber 252 "located on the side of the thermal management component 30 facing away from the substrate 24 and used to accommodate battery cell assemblies." Furthermore, by molding and filling the first chamber 251 with a foam filling structure 40, a cushioning effect can be provided via the foam filling structure 40, thereby improving the bottom ball performance of the housing 20 and the battery device 1. Furthermore, the foam filling structure 40 can be automatically produced based on online foaming technology; and since the housing 20 does not require an additional bottom protective plate to improve the bottom ball performance, complex processes such as bottom protective plate processing, transportation, assembly, and sealing can be eliminated; and since the housing 20 does not require increased thickness and strength to improve the bottom ball performance, the molding difficulty of the housing 20 can be reduced; thus, production difficulty can be reduced, manufacturing processes can be simplified, and production efficiency can be improved. Moreover, the foam filling structure 40 has the characteristics of low cost and light weight, therefore, the weight and cost of the battery device 1 can be reduced, meeting the requirements of lightweight design. Furthermore, while the foam filling structure 40 fills the first chamber 251, it also adheres to at least a portion of the walls of the first chamber 251. This allows the housing 20 and the thermal management component 30 to be firmly integrated through the foam filling structure 40, thereby improving the integration and enhancing the mechanical properties (such as mechanical strength, impact resistance, stability, and reliability) and thermal insulation performance of the battery device 1. It can also reduce the abnormal noise problems of the battery device 1 during transportation and use.

[0093] like Figure 3 , Figure 4 , Figure 7 As shown, in some embodiments, the thermal management component 30 is provided with positioning holes 39, which are used to position and cooperate with the housing 20 to determine the installation position and state of the thermal management component 30 relative to the housing 20. The positioning holes 39 can be, but are not limited to, circular holes, oblong holes, polygonal holes (e.g., rectangular holes), irregularly shaped holes, etc. One or more positioning holes 39 can be provided, and the number and size of the positioning holes 39 can be set as needed. For example, two positioning holes 39 can be provided, with the two positioning holes 39 respectively located near two opposite corners of the thermal management component 30.

[0094] Please see Figure 6 , Figure 7 , Figure 8In some embodiments of this application, at least one of the thermal management component 30 and the housing 20 is provided with a pouring hole 34, and / or a pouring hole 34 is formed between the thermal management component 30 and the housing 20. At least one of the thermal management component 30 and the housing 20 is provided with an vent 26, and / or a vent 26 is formed between the thermal management component 30 and the housing 20. Both the pouring hole 34 and the vent 26 are configured to communicate the first chamber 251 to the outside of the first chamber 251. The pouring hole 34 is used to inject the foaming material forming the foamed fill structure 40.

[0095] It should be noted that the thermal management component 30 can be provided with a pouring hole 34, the housing 20 can be provided with a pouring hole 34, or the gap between the thermal management component 30 and the housing 20 can be used to form the pouring hole 34. These three options can be selected, two options can be selected, or all three options can be combined. The pouring hole 34 can connect the first chamber 251 to the outside of the first chamber 251, so that the foaming material for forming the foamed filling structure 40 can be injected into the first chamber 251 from the outside of the first chamber 251 through the pouring hole 34; wherein, "the outside of the first chamber 251" can be the second chamber 252 "located outside the first chamber 251 and inside the housing 20", or it can be the outside of the housing 20.

[0096] For example, such as Figure 6 , Figure 7 As shown, in some embodiments, the thermal management component 30 is provided with a casting hole 34, which connects the first chamber 251 to the second chamber 252. In other embodiments, the support portion 232 or other parts of the housing 20 are provided with casting holes 34, which connect the first chamber 251 to the second chamber 252. In other embodiments, the gap between the thermal management component 30 and the housing 20 forms the casting hole 34, which connects the first chamber 251 to the second chamber 252. In other embodiments, the base plate 24 or the enclosure wall 23 of the housing 20 is provided with casting holes 34, which connect the first chamber 251 to the outside of the housing 20.

[0097] Based on this, with the housing 20 and the thermal management component 30 assembled and fixed, the entire structure can be placed on the foaming material filling workbench. The thermal management component 30 can be limited and positioned using tooling. Then, the glue gun of the foaming equipment (also known as the foaming material filling equipment) is aligned with the pouring hole 34, and the foaming material is injected into the first chamber 251 through the pouring hole 34. The unfoamed state of the foaming material is liquid. After the foaming material injection operation is completed and the glue gun is removed, a plug can be used to block the pouring hole 34 to promote the foaming material to flow fully in the first chamber 251, maintain pressure and foam until the foaming reaction is completed and the material is cured, and to prevent the foaming material from overflowing from the pouring hole 34. After the foamed material has solidified into a foamed filling structure 40, the plug of the pouring hole 34 can be removed. If the pouring hole 34 is connected to the second chamber 252, there is no need to perform an additional sealing process for the pouring hole 34. However, if the pouring hole 34 is connected to the outside of the box 20, an additional sealing process for the pouring hole 34 is required to maintain the airtightness of the box 20.

[0098] The pouring hole 34 can be, but is not limited to, a circular hole, an oblong hole, a polygonal hole (e.g., a rectangular hole), an irregularly shaped hole, etc. One or more pouring holes 34 can be provided, and the number and size of the pouring holes 34 can be set as needed. For example, the size of the pouring hole 34 can be designed to match the size of the glue gun. When multiple pouring holes 34 are provided, they can be uniformly located in the thermal management component 30, the housing 20, or "between the thermal management component 30 and the housing 20," or they can be separately located in at least two of the following: the thermal management component 30, the housing 20, or "between the thermal management component 30 and the housing 20." The multiple pouring holes 34 can be uniformly connected to the second chamber 252 or the outside of the housing 20, or partly connected to the second chamber 252 and partly connected to the outside of the housing 20. The shape and size of the multiple pouring holes 34 can be the same or different.

[0099] It should also be noted that the thermal management component 30 can be equipped with an exhaust port 26, the housing 20 can be equipped with an exhaust port 26, or the gap between the thermal management component 30 and the housing 20 can form an exhaust port 26. These three options can be selected, two options can be selected, or all three options can be combined. The exhaust port 26 can connect the first chamber 251 to the outside of the first chamber 251. The "outside of the first chamber 251" can be the second chamber 252, which is "located outside the first chamber 251 and inside the housing 20", or it can be the outside of the housing 20.

[0100] For example, such as Figure 6 , Figure 8As shown, in some embodiments, the support portion 232 and other parts of the housing 20 are provided with an exhaust port 26, which connects the first chamber 251 to the second chamber 252. In other embodiments, the gap between the thermal management component 30 and the housing 20 forms the exhaust port 26, which connects the first chamber 251 to the second chamber 252. In other embodiments, the thermal management component 30 is provided with an exhaust port 26, which connects the first chamber 251 to the second chamber 252. In other embodiments, the base plate 24 or the enclosure wall 23 of the housing 20 is provided with an exhaust port 26, which connects the first chamber 251 to the outside of the housing 20.

[0101] Based on this, during the flow of the foaming material in the first chamber 251, the completion of the foaming reaction, and the curing, the air pressure at the exhaust port 26 is relatively low. The foaming material can automatically flow towards the lower air pressure area within the first chamber 251, which helps control the flow direction of the foaming material, promotes its full flow within the first chamber 251, and facilitates the full filling of the first chamber 251 by the foamed filling structure 40. Since a large amount of gas (such as carbon dioxide) is generated during the foaming reaction, and the expansion and filling of the foaming material requires occupying space within the first chamber 251, the gas can be discharged from the first chamber 251 through the exhaust port 26. This reduces the risk of gas stagnation leading to excessive voids in the foamed filling structure 40 and weakening its strength. It also reduces the risk of gas volume pressure hindering the flow of the foaming material and preventing the foamed filling structure 40 from filling the first chamber 251. After the foam material is cured and formed into a foam filling structure 40, if the exhaust port 26 is connected to the second chamber 252, there is no need to perform an additional sealing process for the exhaust port 26; however, if the exhaust port 26 is connected to the outside of the box 20, an additional sealing process for the exhaust port 26 is required to maintain the airtightness of the box 20.

[0102] The vent 26 can be a perforated structure (e.g., circular, oblong, polygonal, or irregularly shaped) or a grooved structure. One or more vents 26 can be provided, and the number and size of the vents 26 can be set as needed, for example, according to the expansion ratio of the foaming material and the size of the first chamber 251. The expansion ratio of the foaming material is a key indicator for measuring the degree of foam expansion, usually referring to the ratio of the volume of the foamed material to the volume of the raw material before foaming. It can also be expressed as the inverse ratio of the density after foaming to the density before foaming (since the mass remains essentially unchanged, volume and density are inversely proportional). When there are multiple exhaust ports 26, the multiple exhaust ports 26 can be uniformly set in the thermal management component 30 or the housing 20 or "between the thermal management component 30 and the housing 20", or they can be separately set in at least two of the thermal management component 30, the housing 20, or "between the thermal management component 30 and the housing 20"; the multiple exhaust ports 26 can be uniformly connected to the second chamber 252 or the outside of the housing 20, or part of them can be connected to the second chamber 252 and the other part can be connected to the outside of the housing 20; the multiple exhaust ports 26 can be set in the same shape and size or they can be set in different ways.

[0103] By adopting the above scheme, a stable and precise injection channel for the foaming material can be provided through the pouring hole 34, facilitating the smooth and unobstructed entry of the foaming material into the relatively enclosed first chamber 251. This is compatible with online foaming technology, facilitates automated production, and improves production efficiency. Furthermore, the vent 26 creates a relatively low-pressure area at its location, using the pressure difference to guide the foaming material to automatically flow towards the low-pressure area within the first chamber 251. This controls the flow direction of the foaming material, reduces local accumulation or flow obstruction, and promotes full flow of the foaming material within the first chamber 251. Furthermore, during the foaming reaction and curing process of the foaming material in the first chamber 251, a large amount of gas is generated during the foaming reaction. Since the expansion and filling of the foaming material requires squeezing the internal space of the first chamber 251, the gas in the first chamber 251 can be easily discharged in time through the exhaust port 26. This reduces the risk of gas retention leading to excessive voids in the foam filling structure 40 and weakening its strength. It also reduces the risk of gas volume pressure hindering the flow of the foaming material and preventing the foam filling structure 40 from filling the first chamber 251. This promotes the full filling of the first chamber 251 by the foam filling structure 40, maintains and improves the density, stability, and reliability of the foam filling structure 40, maintains and improves the bottom ball performance, mechanical performance, and thermal insulation performance of the housing 20 and battery device 1, adapts to online foaming technology and automated production requirements, and maintains and improves the consistency of production quality.

[0104] Please see Figure 6 , Figure 7 , Figure 8In some embodiments of this application, the pouring hole 34 is closer to the center of the first chamber 251 than the vent 26.

[0105] It should be noted that the pouring hole 34 is relatively close to the center of the first chamber 251, while the vent 26 is relatively far from the center of the first chamber 251. For example, in some embodiments, the pouring hole 34 communicates with the first chamber 251 at the middle, for example, the pouring hole 34 is located at the middle of the thermal management component 30, or for example, the pouring hole 34 is located at the middle of the substrate 24; the vent 26 communicates with the first chamber 251 at its periphery, for example, the vent 26 is located on the surrounding wall 23, or for example, the vent 26 is located at the periphery of the thermal management component 30 or the substrate 24, or for example, the vent 26 is located in the gap between the thermal management component 30 and the housing 20.

[0106] By adopting the above scheme, by making the pouring hole 34 closer to the center of the first chamber 251 than the vent 26, the distance from the pouring hole 34 to each side of the first chamber 251 can be made relatively balanced. By making the vent 26 farther away from the center of the first chamber 251 than the pouring hole 34, the air pressure in the area far from the center of the first chamber 251 can be lower than the air pressure in the area near the center of the first chamber 251, thus forming a pressure gradient guidance of "high air pressure in the middle and low air pressure on the periphery". Based on this, after the foaming material is injected through the pouring hole 34, it can be made to form a radial and uniform flow from the pouring hole 34 to the surrounding exhaust ports 26. This can promote the uniform diffusion and smooth flow of the foaming material from the center to the periphery within the first chamber 251, reducing local accumulation or flow obstruction of the foaming material. Furthermore, compared to a scheme where the foaming material flows in one direction (e.g., the pouring hole 34 is located on one side and the exhaust ports 26 are located on the other side), the radial flow path allows the foaming material to diffuse in multiple directions simultaneously, shortening the flow distance of the foaming material and reducing the time required for the foaming material to cover the first chamber 251. This allows the foaming material to quickly, reliably, and fully fill the first chamber 251 within the foaming reaction time. As a result, the uniformity, sufficiency, and density of the foam filling structure 40 within the first chamber 251 can be improved, the filling efficiency of the foam filling structure 40 can be increased, the production cycle and efficiency can be improved, and it can be adapted to mass automated production.

[0107] Of course, in other embodiments, the pouring hole 34 may communicate with the first chamber 251 at its periphery as needed. In other embodiments, the vent 26 may communicate with the first chamber 251 at its center as needed.

[0108] Please see Figure 3 , Figure 4In some embodiments of this application, the battery device 1 includes a first beam 80, which is disposed in and divides the second chamber 252. Multiple battery cell assemblies are provided, distributed on both sides of the first beam 80 perpendicular to its extending direction.

[0109] It should be noted that the first beam 80 is disposed within the second chamber 252, and both ends of the first beam 80 along its extension direction are connected to the enclosure wall 23, thereby enabling the first beam 80 to separate the second chamber 252. Battery cell assemblies can be arranged in both sides of the first beam 80 perpendicular to its extension direction, i.e., in the two partitions of the second chamber 252 separated by the first beam 80. The first beam 80 can at least resist and constrain the expansion of the battery cell assemblies. The connection between the first beam 80 and the enclosure wall 23 can be achieved, but is not limited to, welding, bonding, riveting, and screw fastening. In some embodiments, the extension direction of the first beam 80 is parallel to the first direction x, and correspondingly, the direction perpendicular to the extension direction of the first beam 80 is the second direction y; in other embodiments, the extension direction of the first beam 80 may intersect with the first direction x, for example, the extension direction of the first beam 80 may be perpendicular to the first direction x (i.e., parallel to the second direction y), in which case the direction perpendicular to the extension direction of the first beam 80 is the first direction x. In some embodiments, the first beam 80 may be located in the middle of the second chamber 252 along the second direction y, so that the first beam 80 can serve as an intermediate expansion beam.

[0110] Please see Figure 3 , Figure 4 , Figure 6 In some embodiments of this application, multiple pouring holes 34 are provided, and the multiple pouring holes 34 are distributed on both sides of the first beam 80 perpendicular to its extension direction.

[0111] It should be noted that when there are multiple pouring holes 34, some pouring holes 34 may be located on one side of the first beam 80 perpendicular to its extension direction, and other pouring holes 34 may be located on the other side of the first beam 80 perpendicular to its extension direction. Based on this, the first chamber 251 is located in two partitions on both sides of the first beam 80 perpendicular to its extension direction, and foaming material can be injected nearby through the pouring holes 34 provided in the partition.

[0112] By adopting the above scheme, multiple pouring holes 34 can be distributed on both sides of the first beam 80 perpendicular to its extension direction, using the first beam 80 as a boundary. This allows the first chamber 251, located in two sections on either side of the first beam 80 perpendicular to its extension direction, to inject foaming material through the pouring holes 34 located in those sections, facilitating uniform diffusion of the foaming material in the corresponding sections. Furthermore, the design of multiple pouring holes 34 can balance the air pressure distribution within the first chamber 251, reducing local accumulation or flow obstruction caused by excessive concentration of injection volume in a single pouring hole 34. This improves the uniformity of diffusion and filling of the foaming material in different areas of the first chamber 251, and enhances the uniformity, sufficiency, and density of the foam filling structure 40 within the first chamber 251. Moreover, the design of multiple pouring holes 34 reduces the impact of blockage or abnormal injection in a single pouring hole 34 on the filling effect, thereby maintaining and improving the stability of the production process and the consistency of production quality.

[0113] Of course, in other embodiments, only one pouring hole 34 may be provided. In other embodiments, multiple pouring holes 34 may be provided, and the multiple pouring holes 34 may be flexibly arranged as needed.

[0114] Please see Figure 3 , Figure 4 , Figure 6 In some embodiments of this application, multiple exhaust ports 26 are provided, and the multiple exhaust ports 26 are distributed on both sides of the first beam 80 perpendicular to its extension direction.

[0115] It should be noted that when there are multiple exhaust ports 26, some exhaust ports 26 may be located on one side of the first beam 80 perpendicular to its extension direction, and other exhaust ports 26 may be located on the other side of the first beam 80 perpendicular to its extension direction. Based on this, the first chamber 251 is located in two partitions on both sides of the first beam 80 perpendicular to its extension direction, and exhaust can be vented nearby through the exhaust ports 26 provided in the partition.

[0116] By adopting the above scheme, multiple exhaust ports 26 can be set on both sides of the first beam 80 perpendicular to its extension direction, with the first beam 80 as the boundary. This allows the first chamber 251 to be located in two partitions on both sides of the first beam 80 perpendicular to its extension direction, so that gas can be discharged in a timely manner through the exhaust ports 26 set in the partitions. Furthermore, based on the design of multiple exhaust ports 26, the number of exhaust holes can be increased and the exhaust rate can be improved. This reduces the risk of gas retention leading to excessive voids in the foam filling structure 40 and resulting in weak strength of the foam filling structure 40. It also reduces the risk of gas volume pressure hindering the flow of foam material and hindering the filling of the first chamber 251 by the foam filling structure 40. This promotes the full filling of the first chamber 251 by the foam filling structure 40, maintains and improves the density, stability, and reliability of the foam filling structure 40, maintains and improves the bottom ball performance, mechanical performance, and thermal insulation performance of the housing 20 and battery device 1, adapts to online foaming technology and automated production requirements, and maintains and improves the consistency of production quality.

[0117] Of course, in other embodiments, only one exhaust port 26 may be provided. In other embodiments, multiple exhaust ports 26 may be provided, and the multiple exhaust ports 26 may be flexibly arranged as needed.

[0118] Please see Figure 4 , Figure 6 , Figure 7 In some embodiments of this application, a plurality of casting holes 34 are located in the middle of the first chamber 251 along the first direction x, and are spaced apart along the second direction y.

[0119] It should be noted that the multiple pouring holes 34 are all located in the middle of the first chamber 251 along the first direction x, and the multiple pouring holes 34 are spaced apart along the second direction y. For example, as shown... Figure 4 As shown, in some embodiments, a plurality of casting holes 34 are all located at the middle of the thermal management component 30 along the first direction x, and are spaced apart along the second direction y. In other embodiments, a plurality of casting holes 34 are all located at the middle of the substrate 24 along the first direction x, and are spaced apart along the second direction y. In still other embodiments, a portion of the casting holes 34 are located at the middle of the thermal management component 30 along the first direction x, and another portion of the casting holes 34 are located at the middle of the substrate 24 along the first direction x, with the projections of each casting hole 34 onto the same plane parallel to the substrate 24 spaced apart along the second direction y.

[0120] By adopting the above scheme, the layout of multiple pouring holes 34 can be optimized, which facilitates the radiation and diffusion of foaming material from multiple pouring holes 34 to the periphery, shortens the flow distance of foaming material from multiple pouring holes 34 to each area of ​​the first chamber 251, and significantly reduces the time for foaming material to cover the entire first chamber 251. This can optimize and improve filling efficiency, increase production cycle and efficiency, and adapt to high-cycle automated production.

[0121] Of course, in other embodiments, the pouring holes 34 are located in the middle of the first chamber 251 along other directions (e.g., the second direction y, or a direction intersecting the first direction x and the second direction y, etc.). In other embodiments, a plurality of pouring holes 34 may be spaced apart along other directions (e.g., the first direction x, or a direction intersecting the first direction x and the second direction y, etc.).

[0122] Please see Figure 4 , Figure 6 , Figure 7 In some embodiments of this application, up to three pouring holes 34 are provided. That is, one, two, or three pouring holes 34 may be provided.

[0123] To reduce production costs, a single foaming device could be used to inject the foaming material. In this case, the foaming device would need to inject the foaming material into each pouring hole 34 sequentially. However, the foaming material has a foaming reaction time, and exceeding this time would lead to curing failure. Therefore, by adopting the above solution, and by setting the pouring hole 34 to a maximum of three, the total time for the foaming device to switch hole positions and complete full injection does not exceed the foaming reaction time. All pouring holes 34 can be injected using a single foaming device within the foaming reaction time (i.e., before the foaming material cures). This largely avoids the problem of some foaming material curing failure and incomplete filling of the first chamber 251 due to excessive time spent switching hole positions. It promotes uniform flow and complete filling of the first chamber 251 with the foaming material. Furthermore, it eliminates the need for additional foaming devices to accommodate more holes, reducing equipment investment costs. Thus, it balances foaming filling quality, production efficiency, and cost control, enabling a stable and feasible online foaming process. Furthermore, it can reduce the impact of openings on the structure of the housing 20 or thermal management component 30, and maintain the structural reliability of the housing 20 or thermal management component 30.

[0124] Of course, in other embodiments, the number of pouring holes 34 may be at least four as needed.

[0125] Please see Figure 4 , Figure 6 , Figure 7 In some embodiments of this application, the pouring hole 34 is disposed through the thermal management component 30 and avoids the flow channel 33 of the thermal management component 30.

[0126] It should be noted that the pouring hole 34 is disposed in the thermal management component 30 and passes through the thermal management component 30 to connect the first chamber 251 and the second chamber 252. The pouring hole 34 is disposed away from the flow channel 33 of the thermal management component 30 to avoid the pouring hole 34 from damaging the integrity of the flow channel 33 and affecting the thermal management function of the thermal management component 30.

[0127] By adopting the above-described scheme, and by setting the pouring hole 34 through the thermal management component 30 while avoiding the flow channel 33, the foaming material can be smoothly injected into the first chamber 251 through the pouring hole 34 of the thermal management component 30. This also largely avoids the pouring hole 34 damaging the integrity of the flow channel 33 and affecting the thermal management function of the thermal management component 30. Furthermore, since the pouring hole 34 connects the first chamber 251 and the second chamber 252, after foaming, the pouring hole 34 will not affect the airtightness of the housing 20. Therefore, there is no need to add an additional sealing process for the pouring hole 34. Compared to the scheme where the pouring hole 34 is located in the housing 20 and requires an additional sealing process, this embodiment reduces processing steps, simplifies the production process and improves production efficiency, reduces sealing material consumption and lowers costs, and reduces the risk of seal failure. Thus, it balances functionality (e.g., thermal management performance) and process economy.

[0128] Of course, in other embodiments, the pouring hole 34 can be provided at the support portion 232 of the housing 20, or at the gap between the thermal management component 30 and the housing 20, to connect the first chamber 251 to the second chamber 252. In other embodiments, the pouring hole 34 can be provided on the substrate 24 or the surrounding wall 23 of the housing 20, and connect the first chamber 251 to the outside of the housing 20. In this case, after foaming, the pouring hole 34 will affect the airtightness of the housing 20, and an additional sealing process for the pouring hole 34 is required.

[0129] Please see Figure 6 , Figure 7 , Figure 8 In some embodiments of this application, the enclosure 23 includes two first side portions 231 disposed opposite to each other along a first direction x, and two support portions 232 respectively connected to the inner sides of the two first side portions 231. The support portions 232 extend along a second direction y, which is perpendicular to the first direction x. The thermal management component 30 includes a main body 35 and a first connecting portion 36 connected to the side of the main body 35 corresponding to the support portion 232. The first connecting portion 36 is connected to the side of the support portion 232 facing away from the substrate 24.

[0130] It should be noted that the enclosure 23 includes two first side portions 231, which are arranged opposite each other along a first direction x and both extend along a second direction y. A support portion 232 is connected to the inner side of each first side portion 231, and the support portion 232 also extends along the second direction y. The support portion 232 and the first side portion 231 can be integrally connected or separately connected. Therefore, the side of the support portion 232 facing away from the substrate 24 will be spaced a certain distance from the substrate 24. In some embodiments, the side of the support portion 232 facing the substrate 24 can abut against and be fixed to the substrate 24 to enhance the structural strength and reliability of the enclosure 20.

[0131] The thermal management component 30 includes a main body 35 and a first connecting portion 36. The main body 35 is the primary part of the thermal management component 30 that supports the battery cell assembly and is connected to the battery cell assembly for heat exchange. The first connecting portion 36 is connected to the side of the main body 35 corresponding to the support portion 232, and is a protrusion extending outward relative to the main body 35. The first connecting portion 36 overlaps with the support portion 232 provided on the same side, and is connected and fixed to the support portion 232, so that the thermal management component 30 is stably installed in a position and state relative to the enclosure wall 23 and the substrate 24, and so that the thermal management component 30 and the substrate 24 are stably spaced apart and opposite each other. The thermal management component 30 may have one first connecting portion 36 or multiple first connecting portions 36 spaced apart on the same side as needed. The first connecting part 36 and the support part 232 can be connected and fixed by means of, but not limited to, bonding, welding, riveting, screw fastening, snap-fitting, etc. For example, in some embodiments, the first connecting part 36 and the support part 232 are connected and fixed by a combination of adhesive bonding and riveting spot welding to achieve a stable and reliable connection and fixation.

[0132] By adopting the above solution, by connecting the first connecting portions 36 of the two opposite sides of the thermal management component 30 along the first direction x to the support portions 232 of the two opposite inner walls of the enclosure 23 along the first direction x, the thermal management component 30 can be stably installed in a position and state relative to the enclosure 23 and the substrate 24. The thermal management component 30 can be supported and raised by the two support portions 232, so that the thermal management component 30 and the substrate 24 are stably spaced apart, thereby improving the connection stability, reliability, and robustness between the thermal management component 30 and the housing 20. This facilitates the thermal management component 30 in stably and reliably dividing the accommodating space 25 into a first chamber 251 and a second chamber 252. Furthermore, since the thermal management component 30 and the housing 20 are connected peripherally, avoiding a connection structure in the middle of the first chamber 251, the first chamber 251 is empty before being filled with foaming material. This facilitates the smooth flow of the foaming material within the first chamber 251, enabling the foaming reaction to complete and the material to solidify. Furthermore, based on the multi-directional connection between the thermal management component 30 and the housing 20, and combined with the adhesive effect of the foam filling structure 40, the housing 20, the thermal management component 30, and the substrate 24 can be tightly connected to form a stable overall structure, thereby improving the mechanical performance and thermal insulation performance of the battery device 1 and reducing the abnormal noise problem of the battery device 1 during transportation and use.

[0133] Please see Figure 7 , Figure 8 , Figure 9In some embodiments of this application, the first connecting portion 36 is connected to the support portion 232 by the first fastener 60. The first connecting portion 36 is recessed relative to the main body portion 35 toward the support portion 232, so that the first fastener 60 does not protrude from the surface of the main body portion 35 away from the substrate 24.

[0134] It should be noted that the first connecting portion 36 is recessed relative to the main body portion 35 toward the support portion 232. For example, in some embodiments, the first connecting portion 36 can be stamped so that the side of the first connecting portion 36 facing away from the support portion 232 is lower than the surface of the main body portion 35 facing away from the substrate 24, so that the first connecting portion 36 is recessed relative to the main body portion 35 toward the support portion 232.

[0135] In this configuration, the first connecting portion 36 is connected and fixed to the support portion 232 by a first fastener 60. The portion of the first connecting portion 36 facing away from the support portion 232 is accommodated between the side of the first connecting portion 36 facing away from the support portion 232 and the surface of the main body 35 facing away from the substrate 24, without protruding from the surface of the main body 35 facing away from the substrate 24. The first fastener 60 can be, but is not limited to, a rivet, pin, screw, etc. A first connecting portion 36 can be connected to the support portion 232 as needed via one first fastener 60 or multiple first fasteners 60 spaced apart.

[0136] By adopting the above solution, by making the first connecting portion 36 recessed relative to the main body 35 towards the support portion 232, the side of the first connecting portion 36 facing away from the support portion 232 can be lower than the surface of the main body 35 facing away from the substrate 24. Furthermore, if the first connecting portion 36 is connected and fixed to the support portion 232 via the first fastener 60, the portion of the first fastener 60 located on the side of the first connecting portion 36 facing away from the support portion 232 can be accommodated between the side of the first connecting portion 36 facing away from the support portion 232 and the surface of the main body 35 facing away from the substrate 24, without protruding from the surface of the main body 35 facing away from the substrate 24. This ensures that the flat and close contact between the thermal management component 30 and the battery cell assembly is not affected, which is beneficial for improving the thermal conduction effect and efficiency between the thermal management component 30 and the battery cell assembly.

[0137] Of course, in other embodiments, if the battery cell assembly is disposed away from the first connection portion 36, or if the first connection portion 36 and the support portion 232 are not connected via the first fastener 60 (but are connected via bonding, welding or other means), then the first connection portion 36 may be disposed flush with the main body portion 35, without needing to be recessed relative to the main body portion 35 toward the support portion 232.

[0138] Please see Figure 6 , Figure 7 , Figure 8In some embodiments of this application, the support portion 232 is provided with a first exhaust port 26a in the area away from the first connecting portion 36, and the first exhaust port 26a connects the first chamber 251 and the second chamber 252.

[0139] It should be noted that the first exhaust port 26a is an exhaust port 26 located on the support portion 232. The first exhaust port 26a is located away from the first connecting portion 36, that is, away from the connection between the first connecting portion 36 and the support portion 232. The first exhaust port 26a connects the first chamber 251 to the second chamber 252 on the periphery of the first chamber 251.

[0140] By adopting the above solution, by placing the first exhaust port 26a in the area of ​​the support portion 232 that avoids the first connecting portion 36, on the one hand, the first connecting portion 36 can be basically avoided from blocking the first exhaust port 26a and affecting the exhaust of the first exhaust port 26a. On the other hand, the first exhaust port 26a can fit the design of "connecting the first chamber 251 to the periphery of the first chamber 251", which can meet the pressure gradient requirements of "peripheral exhaust". This is conducive to guiding the foaming material to flow and diffuse to the periphery of the first chamber 251 (especially the side of the first chamber 251 along the first direction x), which is conducive to promoting the smooth discharge of gas inside the first chamber 251, which is conducive to promoting the full filling of the first chamber 251 by the foam filling structure 40, which is conducive to reducing the risk of gas volume pressure hindering the flow of foaming material and hindering the filling of the first chamber 251 by the foam filling structure 40, and which is conducive to reducing the risk of the foam filling structure 40 forming too many voids and resulting in weak strength of the foam filling structure 40. On the other hand, the first exhaust port 26a can be connected to the first chamber 251 and the second chamber 252. After foaming, the first exhaust port 26a will not affect the airtightness of the box 20. There is no need to add an additional sealing process for the first exhaust port 26a. Compared with the solution where the first exhaust port 26a is connected to the outside of the box 20, this embodiment can reduce the sealing process, simplify the production process and improve production efficiency, reduce the consumption of sealing materials and reduce costs, reduce the risk of sealing failure, and adapt to the needs of automated production.

[0141] Please see Figure 7 , Figure 9 , Figure 10 In some embodiments of this application, the battery device 1 includes a second beam 90 disposed in the second chamber 252. The second beam 90 is located on one side of the battery cell assembly and abuts against the battery cell assembly. The second beam 90 is connected to the substrate 24. The thermal management component 30 includes a main body 35 and a second connecting portion 37 connected to the side of the main body 35 corresponding to the second beam 90. The second connecting portion 37 is inserted between the second beam 90 and the substrate 24 and is disposed away from the connection point between the second beam 90 and the substrate 24.

[0142] It should be noted that the second beam 90 is disposed within the second chamber 252, with both ends of the second beam 90 connected to the enclosure wall 23 along its extension direction, and the side of the second beam 90 facing the substrate 24 connected to the substrate 24. The connection between the second beam 90 and the enclosure wall 23, and between the second beam 90 and the substrate 24, can be achieved, but is not limited to, welding, bonding, riveting, and screw fastening. The second beam 90 is located on one side of the battery cell assembly and abuts against the battery cell assembly, and the second beam 90 can at least resist and constrain the expansion of the battery cell assembly. In some embodiments, the second beam 90 is located at the end of the second chamber 252 along the second direction y, so that the second beam 90 can serve as an end expansion beam. In some embodiments, the extension direction of the second beam 90 is parallel to the first direction x; in other embodiments, the extension direction of the second beam 90 may intersect the first direction x, for example, the extension direction of the second beam 90 may be perpendicular to the first direction x (i.e., parallel to the second direction y).

[0143] It should also be noted that the thermal management component 30 includes a main body 35 and a second connecting part 37. The main body 35 is the main part of the thermal management component 30 that carries the battery cell assembly and is connected to the battery cell assembly for heat exchange. The second connecting part 37 is connected to the side of the main body 35 corresponding to the second beam 90, and is a protrusion extending outward relative to the main body 35. The second connecting part 37 is inserted between the second beam 90 and the substrate 24, and is disposed away from the connection point between the second beam 90 and the substrate 24; in other words, the connection point between the second beam 90 and the substrate 24 can be disposed away from the second connecting part 37, and is disposed using the space between two adjacent second connecting parts 37. The second connecting part 37 can be clamped and limited between the second beam 90 and the substrate 24, or it can be connected and fixed to the substrate 24, and is connected and fixed relative to the housing 20. The side of the main body 35 corresponding to the second beam 90 can be provided with one second connecting part 37 or multiple second connecting parts 37 distributed at intervals as needed. Since the second connecting portion 37 is inserted between the second beam 90 and the substrate 24 and clearly avoids the battery cell assembly, the second connecting portion 37 can be flush with the main body 35 without being recessed relative to the main body 35 toward the substrate 24.

[0144] By adopting the above solution, and by inserting the second connecting part 37 between the second beam 90 and the substrate 24, while avoiding the connection point between the second beam 90 and the substrate 24, on the one hand, the second beam 90 can enhance the fixing effect on the thermal management component 30, thereby stabilizing and securing the installation position and state of the thermal management component 30 relative to the housing 20, and improving the connection stability, reliability, and stability between the thermal management component 30 and the housing 20. On the other hand, the second connecting part 37 does not interfere with the connection between the second beam 90 and the substrate 24, and does not hinder the reinforcement effect of the second beam 90 on the housing 20, thereby improving the overall structural stability, reliability, and mechanical performance of the housing 20 and the battery device 1.

[0145] Please see Figure 6 , Figure 7 , Figure 10 In some embodiments of this application, the second connecting portion 37 is connected to the substrate 24. The second connecting portion 37 may be directly connected to the substrate 24 by means of, but not limited to, welding, bonding, riveting, screw fastening, snap-fitting, etc., or may be indirectly connected and fixed to the substrate 24 by other structures (such as bosses) connected to it.

[0146] By adopting the above solution, the connection between the second connecting part 37 and the substrate 24 enables the thermal management component 30 to be connected and fixed to the corresponding side of the housing 20 along the circumferential direction. This stabilizes and secures the installation position and state of the thermal management component 30 relative to the enclosure 23 and the substrate 24, improving the connection stability, reliability, and robustness between the thermal management component 30 and the housing 20. Furthermore, since the connection between the thermal management component 30 and the housing 20 is peripheral, avoiding a connection structure in the middle of the first chamber 251, the first chamber 251 is empty before being filled with foaming material. This facilitates the smooth flow of the foaming material within the first chamber 251, enabling the foaming reaction to complete and the material to solidify.

[0147] This embodiment is particularly suitable for use in conjunction with embodiments where "the first connecting part 36 is connected to the side of the support part 232 facing away from the substrate 24". This configuration allows for a multi-directional connection between the thermal management component 30 and the housing 20, thereby stabilizing and securing the installation position and state of the thermal management component 30 relative to the enclosure 23 and the substrate 24. This improves the connection stability, reliability, and robustness between the thermal management component 30 and the housing 20, and facilitates the stable and reliable division of the accommodating space 25 into a first chamber 251 and a second chamber 252 by the thermal management component 30. Furthermore, based on the multi-directional connection between the thermal management component 30 and the housing 20, and combined with the adhesive effect of the foam filling structure 40, the housing 20, the thermal management component 30, and the substrate 24 are tightly connected to form a stable overall structure. This improves the mechanical and thermal insulation performance of the battery device 1 and reduces abnormal noise issues during transportation and use.

[0148] Please see Figure 6 , Figure 7 , Figure 10 In some embodiments of this application, a plurality of second connecting portions 37 are provided, and the plurality of second connecting portions 37 are spaced apart on the side of the main body 35 corresponding to the second beam 90. A second exhaust port 26b is formed between two adjacent second connecting portions 37, and the second exhaust port 26b connects the first chamber 251 and the second chamber 252.

[0149] It should be noted that the main body 35 is provided with a plurality of second connecting parts 37 spaced apart on the side of the second beam 90. Based on the fact that each second connecting part 37 is inserted between the second beam 90 and the base plate 24, a second exhaust port 26b can be formed between two adjacent second connecting parts 37 to connect the first chamber 251 to the second chamber 252. The exhaust port 26 includes the second exhaust port 26b.

[0150] By adopting the above scheme, by forming a second exhaust port 26b between two adjacent second connecting parts 37 to connect the first chamber 251 to the second chamber 252, on the one hand, the second exhaust port 26b can fit the design of "connecting the first chamber 251 to the periphery of the first chamber 251", which can meet the pressure gradient requirement of "peripheral exhaust", thereby facilitating the flow and diffusion of foamed material to the periphery of the first chamber 251 (especially the side of the first chamber 251 along the second direction y), which is conducive to the smooth discharge of gas inside the first chamber 251, which is conducive to the full filling of the first chamber 251 by the foamed filling structure 40, which is conducive to reducing the risk of gas volume pressure hindering the flow of foamed material and hindering the filling of the first chamber 251 by the foamed filling structure 40, and which is conducive to reducing the risk of the foamed filling structure 40 forming too many voids and thus resulting in weak strength of the foamed filling structure 40. On the other hand, the second exhaust port 26b can be connected to the first chamber 251 and the second chamber 252. After foaming, the second exhaust port 26b will not affect the airtightness of the box 20. There is no need to add an additional sealing process for the second exhaust port 26b. Compared with the solution where the second exhaust port 26b is connected to the outside of the box 20, this embodiment can reduce the sealing process, simplify the production process and improve production efficiency, reduce the consumption of sealing materials and reduce costs, reduce the risk of sealing failure, and adapt to the needs of automated production.

[0151] Please see Figure 4 , Figure 6 , Figure 9 In some embodiments of this application, the thermal management component 30 includes a third connecting portion 38 recessed on the side of the main body 35 away from the second beam 90, and the third connecting portion 38 is connected to the substrate 24.

[0152] It should be noted that a third connecting portion 38 is recessed on the side of the main body 35 away from the second beam 90. The third connecting portion 38 is a region that is flattened relative to the main body 35, and the side of the third connecting portion 38 facing away from the substrate 24 is lower than the surface of the main body 35 facing away from the substrate 24. For example, in some embodiments, the third connecting portion 38 can be formed by stamping a local area on the side of the main body 35 away from the second beam 90.

[0153] The third connecting part 38 can be directly connected to the substrate 24 by means of welding, bonding, riveting, screw fastening, snap-fitting, etc., or can be indirectly connected and fixed to the substrate 24 by other structures (such as bosses) connected to it.

[0154] By adopting the above solution, the connection between the third connecting part 38 and the substrate 24 enables the thermal management component 30 to be connected and fixed to the corresponding side of the housing 20 along the circumferential direction. This stabilizes and secures the installation position and state of the thermal management component 30 relative to the enclosure 23 and the substrate 24, improving the connection stability, reliability, and robustness between the thermal management component 30 and the housing 20. Furthermore, since the connection between the thermal management component 30 and the housing 20 is peripheral, avoiding the connection structure in the middle of the first chamber 251, the first chamber 251 is empty before the foaming material is filled. This facilitates the smooth flow of the foaming material within the first chamber 251, enabling the foaming reaction to complete and the material to solidify.

[0155] This embodiment is particularly suitable for use in conjunction with related embodiments such as "the first connecting part 36 is connected to the side of the support part 232 facing away from the substrate 24" and "the second connecting part 37 is connected to the substrate 24". This arrangement enables multi-directional connection between the thermal management component 30 and the housing 20, thereby stabilizing and securing the installation position and state of the thermal management component 30 relative to the enclosure 23 and the substrate 24. It improves the connection stability, reliability, and robustness between the thermal management component 30 and the housing 20, and facilitates the stable and reliable division of the accommodating space 25 into the first chamber 251 and the second chamber 252 by the thermal management component 30. In particular, when the thermal management component 30 is connected to the housing 20 in a full circumferential direction, the bonding effect of the foam filling structure 40 promotes a tight connection between the housing 20, the thermal management component 30, and the substrate 24, forming a stable overall structure. This improves the mechanical and thermal insulation performance of the battery device 1 and reduces abnormal noise problems during transportation and use.

[0156] Please see Figure 4 , Figure 9 In some embodiments of this application, the third connecting portion 38 is connected to the substrate 24 via a second fastener 70, the second fastener 70 not protruding from the surface of the main body 35 facing away from the substrate 24. The second fastener 70 may be, but is not limited to, a rivet, pin, screw, etc. A third connecting portion 38 may be connected to the substrate 24 via one second fastener 70 or a plurality of spaced second fasteners 70 as needed.

[0157] By adopting the above solution, on the basis that the side of the third connecting part 38 facing away from the substrate 24 is lower than the surface of the main body 35 facing away from the substrate 24, if the third connecting part 38 is connected and fixed to the substrate 24 by the second fastener 70, the part of the second fastener 70 located on the side of the third connecting part 38 facing away from the substrate 24 can be accommodated between the side of the third connecting part 38 facing away from the substrate 24 and the surface of the main body 35 facing away from the substrate 24, without protruding from the surface of the main body 35 facing away from the substrate 24. This does not affect the flat contact and fit between the thermal management component 30 and the battery cell assembly, which is beneficial to improving the thermal conduction effect and thermal conduction efficiency between the thermal management component 30 and the battery cell assembly.

[0158] Of course, in other embodiments, if the battery cell assembly is disposed away from the third connection portion 38, or if the third connection portion 38 is not connected to the substrate 24 via the first fastener 60 (but is connected via bonding, welding or other means), then the third connection portion 38 may be disposed flush with the main body portion 35, without needing to be recessed relative to the main body portion 35 toward the substrate 24.

[0159] Please see Figure 6 , Figure 9 In some embodiments of this application, the foam filling structure 40 is bonded to each wall of the first chamber 251.

[0160] It should be noted that each wall of the first chamber 251 includes the side of the thermal management component 30 facing the substrate 24, the side of the substrate 24 facing the thermal management component 30, and the portion of the inner peripheral wall of the enclosure 23 located between the thermal management component 30 and the substrate 24. The foam filling structure 40 is bonded to each wall of the first chamber 251, that is, in the molded state of the foam filling structure 40, the outer surface of the foam filling structure 40 will be in complete contact and bonded to each wall of the first chamber 251 without obvious gaps or cavities. In particular, the foam filling structure 40 can adapt to the non-flat shape of the wall surface of the first chamber 251 and bond to each wall of the first chamber 251 in a conformal manner.

[0161] By adopting the above solution, and by bonding the foam filling structure 40 to each wall of the first chamber 251 in a conformal manner, the foam filling structure 40 can be precisely filled and shaped according to the actual contours of each wall of the first chamber 251. Based on this, the foam filling structure 40 has extremely high shape adaptability, which can promote the formation of a gapless connection between the foam filling structure 40 and each wall of the first chamber 251, which can basically eliminate gaps in the cavity, reduce structural weak points caused by loose bonding, and significantly improve connection stability, connection tightness, and connection reliability. It can also strengthen the integration of the housing 20, the thermal management component 30, and the foam filling structure 40, and significantly enhance the mechanical properties, impact resistance, deformation resistance, and thermal insulation performance of the overall structure. It can also reduce abnormal noise problems of the battery device 1 during transportation and use.

[0162] Please see Figure 6 , Figure 9 In some embodiments of this application, the thermal management component 30 includes a first plate 31 and a second plate 32 that overlap each other. The first plate 31 and the second plate 32 are stacked in a direction close to the first chamber 251. A portion of the second plate 32 protrudes toward the first chamber 251 to form a protrusion 321. The protrusion 321 forms a flow channel 33 toward the interior of the first plate 31.

[0163] It should be noted that the thermal management component 30 includes a first plate 31 and a second plate 32 that are separately formed and overlap each other. The first plate 31 and the second plate 32 are stacked along the direction close to the first chamber 251. A portion of the second plate 32 protrudes towards the first chamber 251 to form a protrusion 321. Correspondingly, a recess is formed on the side of the protrusion 321 facing the first plate 31, and the recess can serve as a flow channel 33, that is, a flow channel 33 is provided inside the protrusion 321. The first plate 31 is connected and fixed to the second plate 32, and the first plate 31 covers the flow channel 33 of the second plate 32. The second plate 32 can be formed by, but is not limited to, stamping, blow molding, etc. The protrusion 321 and its flow channel 33 can be extended in a straight line, or extended in a curved line, or extended in a zigzag line. The width and extension path of the protrusion 321 and its flow channel 33 can be flexibly set as needed.

[0164] By adopting the above solution, by providing a protrusion 321 on the side of the thermal management component 30 facing the first chamber 251, the protrusion 321 of the thermal management component 30 can be embedded in the foam filling structure 40 to form a physical interlock, thereby significantly increasing the connection area and connection depth between the thermal management component 30 and the foam filling structure 40. Combined with the design of the foam filling structure 40 and the walls of the first chamber 251, the integration of the thermal management component 30, the foam filling structure 40 and the housing 20 can be strengthened, which can enhance the mechanical properties, impact resistance, deformation resistance and heat insulation performance of the overall structure, and reduce the abnormal noise problem of the battery device 1 during transportation and use. Furthermore, the protrusion 321 facilitates the design of the flow channel 33 of the thermal management component 30, allowing the flow channel 33 to be placed within the protrusion 321 to maintain the thermal management performance and efficiency of the thermal management component 30. This arrangement also helps to make the side of the thermal management component 30 facing away from the first chamber 251 relatively flat, thereby facilitating the flat and close contact between the thermal management component 30 and the battery cell assembly via its side facing away from the first chamber 251, which helps to improve the heat conduction effect and efficiency between the thermal management component 30 and the battery cell assembly. In addition, it allows the protrusion 321 and its flow channel 33 to avoid occupying the space of the second chamber 252, thereby maintaining and expanding the effective space within the housing 20 that can be used to accommodate the battery cell assembly, and maintaining and improving the energy density of the battery device 1.

[0165] like Figure 3 , Figure 4 , Figure 6 As shown, in some embodiments, a fixing strip 50 may be provided on the side of the thermal management component 30 facing away from the first chamber 251, so as to position and connect the battery cell assembly via the fixing strip 50.

[0166] Of course, in other embodiments, the protrusion 321 may be omitted from the side of the thermal management component 30 facing the first chamber 251.

[0167] Please see Figure 6 , Figure 9 In some embodiments of this application, the substrate 24 is provided with reinforcing ribs 241 on the side facing the first chamber 251.

[0168] It should be noted that a reinforcing rib 241 is provided on the side of the substrate 24 facing the first chamber 251. The reinforcing rib 241 can be a convex rib or a concave rib. The reinforcing rib 241 can be extended in a straight line, or it can be extended in a bent line or a zigzag line. The width and extension path of the reinforcing rib 241 can be flexibly set as needed.

[0169] By adopting the above-mentioned scheme, and by providing reinforcing ribs 241 on the side of the substrate 24 facing the first chamber 251, on the one hand, the reinforcing ribs 241 can directly improve the structural strength and deformation resistance of the substrate 24 itself, reducing the risk of the substrate 24 denting or breaking due to bottom impact or heavy pressure. It can also enhance the overall impact resistance of the battery device 1 in conjunction with the buffering and energy absorption effect of the foam filling structure 40. On the other hand, the reinforcing ribs 241 can make the corresponding wall of the first chamber 251 form a concave-convex profile, which can facilitate the foam filling structure 40 to be tightly engaged with the reinforcing ribs 241 through conformal bonding. This can increase the connection area between the substrate 24 and the foam filling structure 40, enhance the connection tightness and firmness between the substrate 24 and the foam filling structure 40, strengthen the integration of the housing 20, the foam filling structure 40 and the thermal management component 30, enhance the mechanical properties, impact resistance, deformation resistance and thermal insulation performance of the overall structure, and reduce abnormal noise problems of the battery device 1 during transportation and use.

[0170] Of course, in other embodiments, the reinforcing rib 241 may be omitted from the side of the substrate 24 facing the first chamber 251.

[0171] Please see Figure 6 , Figure 7 In some embodiments of this application, the surfaces of both the housing 20 and the thermal management component 30 located outside the first chamber 251 are provided with protective layers, including at least one of an electrophoretic layer, a powder coating layer, and a spray coating layer.

[0172] It should be noted that when the thermal management component 30 is located inside the housing 20 and fixedly connected to the housing 20, both the housing 20 and the thermal management component 30 can be protected together, so that the surfaces of both the housing 20 and the thermal management component 30 located outside the first chamber 251 are provided with protective layers. The surfaces of both the housing 20 and the thermal management component 30 located outside the first chamber 251 include: the side of the thermal management component 30 facing away from the first chamber 251, the portion of the inner peripheral wall of the enclosure 23 located outside the first chamber 251 (i.e., inside the second chamber 252), the outer surface of the enclosure 23, and the outer surface of the substrate 24.

[0173] The protective layer includes at least one of an electrophoretic layer, a powder coating layer, and a spray coating layer. In some embodiments, the protective layer may include all three: an electrophoretic layer, a powder coating layer, and a spray coating layer. In other embodiments, the protective layer may include only one of the electrophoretic layer, a powder coating layer, and a spray coating layer; or, the protective layer may include any two of the electrophoretic layer, a powder coating layer, and a spray coating layer.

[0174] The electrophoretic layer is a protective layer formed by electrophoresis. Electrophoresis is a process that uses an electric field to deposit charged paint particles onto a corresponding surface to form a uniform coating. The electrophoretic layer has good coating uniformity and comprehensive coverage, enabling the surfaces of the housing 20 and the thermal management component 30 located outside the first chamber 251 to have rust and corrosion resistance.

[0175] Powder coating is a protective layer formed by powder spraying. Powder spraying is a process in which solid powder coating is electrostatically adsorbed onto a corresponding surface and then cured at high temperature to form a uniform coating. Powder coating has strong wear resistance and impact resistance, effectively resisting mechanical scratches; it also has excellent chemical corrosion resistance, which helps to isolate water, air, acids, alkalis, etc.; and it has high powder utilization and good environmental performance.

[0176] A spray coating is a protective layer formed by spraying. Spraying is a process in which a paste-like coating is applied to a corresponding surface and then heated and plasticized to form a coating. In some embodiments, the spray coating may be made of polyvinyl chloride (PVC), which gives the spray coating excellent sealing and waterproof properties, fills tiny gaps, and prevents liquids and dust from entering the interior; it may also be an elastic coating that absorbs vibration and cushions impact, protecting the housing 20, thermal management components 30, and internal components; and it may have strong weather resistance, adapting to environments with high and low temperatures and humidity changes, thereby improving reliability and extending service life.

[0177] By adopting the above solution, the surfaces of the housing 20 and the thermal management component 30 located outside the first chamber 251 can be jointly protected while the housing 20 and the thermal management component 30 are assembled and fixed, forming a protective layer comprising at least one of an electrophoretic layer, a powder coating layer, and a spray coating layer. Based on this, external moisture, dust, corrosive substances, etc., can be effectively isolated through the protective layer, reducing the risk of corrosion on the outer surfaces of both the housing 20 and the thermal management component 30, thereby improving the reliability of the battery device 1 and extending its service life. Furthermore, in the production process, it is not necessary to separately protect the housing 20 and the thermal management component 30, thus simplifying the protection and production processes and improving production efficiency. Moreover, integrated protection treatment reduces equipment usage and manual operation costs, thereby controlling costs while maintaining the protective effect and reducing overall costs.

[0178] Please see Figure 7 , Figure 9 In some embodiments of this application, the enclosure 23 and the substrate 24 are integrally formed. That is, the enclosure 23 and the substrate 24 are integrally formed and integrally connected.

[0179] By adopting the above solution, and making the enclosure 23 and the substrate 24 a single molded structure, the assembly process between the enclosure 23 and the substrate 24 can be omitted in the production process, reducing the number of parts and assembly time. This can be combined with online foaming technology to optimize and improve overall production efficiency. It also facilitates standardized production through molds, improving the molding consistency of the housing 20. Furthermore, the single-piece molding essentially eliminates the seams between the enclosure 23 and the substrate 24, reducing the risk of loosening or leakage at the joints due to vibration or impact. This improves the overall rigidity and sealing of the housing 20, reduces the need for additional sealing components, lowers the risk of long-term reliability issues due to seal aging, and reduces the weight of the housing 20.

[0180] Of course, in other embodiments, the enclosure 23 and the substrate 24 can be separately formed and separately connected.

[0181] Please see Figure 6 , Figure 7 , Figure 9 In some embodiments of this application, the enclosure 23 and the substrate 24 are integrally stamped structures. It should be noted that the enclosure 23 and the substrate 24 are integrally stamped structures, that is, the enclosure 23 and the substrate 24 are integrally stamped.

[0182] By adopting the above-described solution, and by integrally stamping the enclosure 23 and the substrate 24, the complex manufacturing process of the housing 20 can be reduced, the draft angle and forming difficulty of the housing 20 can be lowered, and the processing accuracy and structural consistency of the enclosure 23 and the substrate 24 can be maintained and improved, making it suitable for mass production and batch production. Furthermore, compared with the existing solution of "improving the bottom ball performance by increasing the thickness and strength of the housing 20", the housing 20 in this embodiment does not need to be provided with a large draft angle. Since the housing 20 and the thermal management component 30 can be integrated through the foam filling structure 40, the integration can be improved, thereby maintaining and expanding the effective space inside the housing 20 that can be used to accommodate battery cells, and maintaining and improving the energy density of the battery device 1.

[0183] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 Based on the above embodiments, this application provides a specific example of a battery device 1. The battery device 1 includes a housing 20, a thermal management component 30, a battery cell assembly, a foam filling structure 40, a first beam 80, and a second beam 90.

[0184] The housing 20 includes a surrounding wall 23 and a base plate 24. The base plate 24 is connected to and covers the surrounding wall 23, and the surrounding wall 23 and the base plate 24 enclose and form an accommodating space 25. The surrounding wall 23 and the base plate 24 are integrally stamped structures.

[0185] A thermal management component 30 is disposed within the housing 20 and spaced apart from the substrate 24. The periphery of the thermal management component 30 is connected to the housing 20. The thermal management component 30 divides the accommodating space 25 into a first chamber 251 and a second chamber 252. The first chamber 251 is the enclosed space between the thermal management component 30, the surrounding wall 23, and the substrate 24. The second chamber 252 is the enclosed space between the side of the thermal management component 30 facing away from the substrate 24 and the surrounding wall 23. A battery cell assembly is disposed within the second chamber 252, and the thermal management component 30 supports and thermally connects to the battery cell assembly.

[0186] The enclosure 23 includes two first side portions 231 disposed opposite each other along a first direction x, and two support portions 232 respectively connected to the inner sides of the two first side portions 231. The support portions 232 extend along a second direction y, which is perpendicular to the first direction x. A second beam 90 is disposed within the second chamber 252 and extends along the first direction x. Both ends of the second beam 90 along the first direction x are connected to the enclosure 23. The side of the second beam 90 facing the substrate 24 is connected to the substrate 24. The second beam 90 is located at the end of the second chamber 252 along the second direction y. The thermal management component 30 includes a main body 35, a first connecting portion 36, a second connecting portion 37, and a third connecting portion 38. The first connecting portion 36 is connected to the side of the main body 35 corresponding to the support portion 232. The first connecting portion 36 is connected to the side of the support portion 232 facing away from the substrate 24 via a first fastener 60. The first connecting portion 36 is recessed relative to the main body 35 toward the support portion 232, so that the first fastener 60 does not protrude from the surface of the main body 35 facing away from the substrate 24. The second connecting portion 37 is connected to the side of the main body 35 corresponding to the second beam 90. The second connecting portion 37 is inserted between the second beam 90 and the substrate 24, and is positioned away from the connection point between the second beam 90 and the substrate 24, and is connected to the substrate 24. The third connecting portion 38 is recessed on the side of the main body 35 away from the second beam 90. The third connecting portion 38 is connected to the substrate 24 via a second fastener 70, and the second fastener 70 does not protrude from the surface of the main body 35 facing away from the substrate 24. Based on this, the periphery of the thermal management component 30 can be circumferentially connected to the housing 20.

[0187] A first beam 80 is disposed within the second chamber 252 and extends along the first direction x. Both ends of the first beam 80 along the first direction x are connected to the enclosure wall 23. The first beam 80 is located in the middle of the second chamber 252 along the second direction y and separates the second chamber 252. A heat management component 30 has two pouring holes 34, which are disposed away from the flow channel 33 of the heat management component 30. Both pouring holes 34 are located in the middle of the first chamber 251 along the first direction x, and are respectively disposed on both sides of the first beam 80 along the second direction y, spaced apart along the second direction y. Both pouring holes 34 connect the first chamber 251 to the second chamber 252 at the middle of the first chamber 251. The exhaust port 26 includes multiple first exhaust ports 26a and multiple second exhaust ports 26b. The first exhaust port 26a is located in the area of ​​the support portion 232 that avoids the first connecting portion 36. Multiple first exhaust ports 26a are distributed on both sides of the first beam 80 along the second direction y. The first exhaust ports 26a connect the first chamber 251 to the second chamber 252 around its periphery. The main body 35 has multiple second connecting portions 37 spaced apart on the side of the second beam 90. A second exhaust port 26b is formed between two adjacent second connecting portions 37. The second exhaust port 26b connects the first chamber 251 to the second chamber 252 around its periphery.

[0188] The substrate 24 has a reinforcing rib 241 on the side facing the receiving space 25. The thermal management component 30 includes a first plate 31 and a second plate 32 that are separately formed and overlap each other. The first plate 31 and the second plate 32 are stacked in a direction close to the first chamber 251. A portion of the second plate 32 protrudes towards the first chamber 251 to form a protrusion 321. Correspondingly, a recess is formed on the side of the protrusion 321 facing the first plate 31. The recess can serve as a flow channel 33, that is, a flow channel 33 is provided inside the protrusion 321. The first plate 31 is connected and fixed to the second plate 32, and the first plate 31 covers the flow channel 33 of the second plate 32. The flow channel 33 can be used to flow a heat exchange fluid, which can be used to regulate the temperature of the battery cell. The heat exchange fluid can be a liquid or a gas, and can be, but is not limited to, water, a mixture of water and ethylene glycol, or air.

[0189] Based on this, the foam filling structure 40 can be filled into the first chamber 251 using online foaming technology, and the foam filling structure 40 can be bonded to the walls of the first chamber 251. Specifically, when the housing 20 and the thermal management component 30 are assembled and fixed, the whole structure can be placed on the foam material filling workbench, and the thermal management component 30 can be limited and positioned by tooling. Then, the glue gun of the foaming equipment (also known as the foam material filling equipment) is aligned with the pouring hole 34, and the foam material is injected into the first chamber 251 through the pouring hole 34. The unfoamed state of the foam material is liquid. After the foaming material injection is completed and the glue gun is removed, a plug can be used to block the pouring hole 34 to prevent the foaming material from overflowing from the pouring hole 34. Since the thermal management component 30 and the housing 20 are connected peripherally and the connection structure is avoided in the middle of the first chamber 251, the foaming material can flow smoothly and fully in the first chamber 251, maintain pressure and foam until the foaming reaction is completed and the material is cured and formed. During the process of the foaming material flowing fully within the first chamber 251, the distance from the pouring hole 34 to each side of the first chamber 251 is relatively balanced, and the air pressure on the periphery of the first chamber 251 is lower than that in the center of the first chamber 251. This allows the foaming material to flow radially and uniformly from the pouring hole 34 to the surrounding exhaust ports 26. This promotes the uniform diffusion and smooth flow of the foaming material from the center to the periphery within the first chamber 251, thereby reducing local accumulation or flow obstruction of the foaming material. It also allows the foaming material to diffuse in multiple directions simultaneously, shortens the flow distance of the foaming material, and reduces the time required for the foaming material to cover the first chamber 251. This enables the foaming material to quickly, reliably, and fully fill the first chamber 251 within the foaming reaction time. When the foam material is cured and molded into a foam filling structure 40, the foam filling structure 40 will adhere and bond to each wall of the first chamber 251, allowing the housing 20 and the thermal management component 30 to be integrated into one unit through the foam filling structure 40, thereby improving the integration. In this case, the plug of the pouring hole 34 can be pulled out. Since each pouring hole 34 and each vent 26 is connected to the first chamber 251 and the second chamber 252, it will not affect the airtightness of the housing 20, and there is no need to add an additional sealing process for the pouring hole 34 and the vent 26.

[0190] Therefore, the foam filling structure 40 provides a cushioning effect, thereby improving the bottom ball performance of the housing 20 and the battery device 1. Furthermore, the foam filling structure 40 can be automatically produced based on online foaming technology; since the housing 20 does not require an additional bottom protective plate to improve bottom ball performance, complex processes such as processing, transportation, assembly, and sealing related to the bottom protective plate can be eliminated; since the housing 20 does not require increased thickness and strength to improve bottom ball performance, the difficulty of demolding and molding of the housing 20 can be reduced; and since there is no need to add additional sealing processes for the pouring hole 34 and vent 26, the production difficulty can be reduced, the manufacturing process can be simplified, and production efficiency can be improved. Moreover, the foam filling structure 40 has the characteristics of low cost and light weight, thus reducing the weight and cost of the battery device 1 and meeting the requirements of lightweight design. Furthermore, the housing 20 and the thermal management component 30 can be firmly integrated through the foam filling structure 40, thereby improving the mechanical properties (such as mechanical strength, impact resistance, stability, and reliability) and thermal insulation performance of the battery device 1, and reducing abnormal noise problems during transportation and use. Moreover, since the housing 20 does not require a large draft angle, and since the housing 20 and the thermal management component 30 can be integrated through the foam filling structure 40 to improve integration, and since the protrusion 321 and its internal flow channel 33 do not occupy the space of the second chamber 252, the effective space within the housing 20 that can accommodate individual battery cells can be maintained and expanded, thus maintaining and improving the energy density of the battery device 1.

[0191] When the housing 20 and the thermal management component 30 are assembled and fixed, the surfaces of both the housing 20 and the thermal management component 30 located outside the first chamber 251 are jointly protected to form a protective layer comprising at least one of an electrophoretic layer, a powder coating layer, and a spray coating layer. Based on this, external moisture, dust, corrosive substances, etc., can be effectively isolated through the protective layer, reducing the risk of corrosion on the outer surfaces of both the housing 20 and the thermal management component 30, thereby improving the reliability of the battery device 1 and extending its service life. Furthermore, in the production process, it is not necessary to separately protect the housing 20 and the thermal management component 30, thus simplifying the protection and production processes and improving production efficiency. Moreover, the integrated protection treatment reduces equipment usage and manual operation costs, thereby controlling costs while maintaining the protective effect and reducing overall costs.

[0192] Please see Figure 1 , Figure 3 Some embodiments of this application provide an electrical device, including the battery device 1 provided in the embodiments of this application.

[0193] By adopting the above solution, the electrical device can improve its bottom ball performance, usage performance, usage reliability, and service life by applying the battery device 1 provided in the embodiments of this application.

[0194] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a surrounding wall and a base plate connected to the surrounding wall, the surrounding wall and the base plate enclosing a containing space; a thermal management component arranged in the box body and spaced apart from the base plate, a peripheral side of the thermal management component being connected to the box body, the thermal management component dividing the containing space into a first chamber and a second chamber, the first chamber being an enclosed space between the thermal management component, the surrounding wall and the base plate; a battery cell assembly arranged in the second chamber, the thermal management component carrying the battery cell assembly and being in heat exchangeable connection with the battery cell assembly; a foamed filling structure filled in the first chamber.

2. The battery device of claim 1, wherein At least one of the thermal management component and the box body is provided with a pouring hole, and / or a pouring hole is formed between the thermal management component and the box body; At least one of the thermal management component and the box body is provided with an exhaust port, and / or an exhaust port is formed between the thermal management component and the box body; The pouring hole and the exhaust port are both configured to communicate the first chamber to the outside of the first chamber, and the pouring hole is used for injecting a foaming material to form the foamed filling structure.

3. The battery device of claim 2, wherein The pouring hole is closer to the center of the first chamber than the exhaust port.

4. The battery device of claim 2, wherein The battery device comprises a first beam arranged in the second chamber and dividing the second chamber; The battery cell assembly is provided in plurality, and the plurality of battery cell assemblies are distributed on both sides of the first beam perpendicular to the extension direction of the first beam; The pouring hole is provided in plurality, and the plurality of pouring holes are distributed on both sides of the first beam perpendicular to the extension direction of the first beam; The exhaust port is provided in plurality, and the plurality of exhaust ports are distributed on both sides of the first beam perpendicular to the extension direction of the first beam.

5. The battery device of claim 2, wherein The pouring hole is provided in at most three.

6. The battery device of claim 2, wherein The pouring hole is arranged through the thermal management component and avoids the flow channel of the thermal management component.

7. The battery device of any one of claims 1-6, wherein, The surrounding wall comprises two first side portions arranged opposite in a first direction, and two support portions connected to the inner sides of the two first side portions respectively, the support portions being arranged extending in a second direction perpendicular to the first direction; The thermal management component comprises a main body portion, and a first connecting portion connected to the side of the main body portion corresponding to the support portion, the first connecting portion being connected to the side of the support portion away from the base plate.

8. The battery device of claim 7, wherein The first connecting portion is connected to the support portion by a first fastener, the first connecting portion is recessed towards the support portion relative to the main body portion, so that the first fastener does not protrude from the surface of the main body portion away from the base plate.

9. The battery device of claim 7, wherein The area of the support portion avoiding the first connecting portion is provided with a first exhaust port, and the first exhaust port communicates the first chamber and the second chamber.

10. The battery device of any one of claims 1-6, wherein, The battery device comprises a second beam arranged in the second chamber, the second beam being located on one side of the battery cell assembly and abutting the battery cell assembly, and the second beam being connected to the base plate; The heat management component comprises a main body part and a second connecting part connected to the side of the main body part corresponding to the second beam body, the second connecting part is inserted between the second beam body and the substrate, and is arranged away from the connecting part of the second beam body and the substrate.

11. The battery device of claim 10, wherein, The second connecting part is connected to the substrate.

12. The battery device of claim 10, wherein, The second connecting part is provided in plurality, and the plurality of second connecting parts are arranged at intervals between the side of the main body part corresponding to the second beam body, a second exhaust port is formed between two adjacent second connecting parts, and the second exhaust port communicates the first chamber and the second chamber.

13. The battery device of claim 10, wherein, The heat management component comprises a third connecting part recessed away from the side of the main body part corresponding to the second beam body, the third connecting part is connected to the substrate through a second fastener, and the second fastener does not protrude from the surface of the main body part away from the substrate.

14. The battery device of any one of claims 1-6, wherein, The foamed filling structure is adhered to each wall of the first chamber.

15. The battery device of claim 14, wherein, The heat management component comprises a first plate part and a second plate part that are overlapped with each other, the first plate part and the second plate part are arranged in a stacked manner in a direction close to the first chamber, a part of the second plate part is arranged protruding towards the first chamber to form a protruding part, and the protruding part forms a flow channel towards the inside of the first plate part.

16. The battery device of claim 14, wherein, The substrate is provided with a reinforcing rib on the side close to the first chamber.

17. The battery device of any one of claims 1-6, wherein, The surfaces of the box body and the heat management component outside the first chamber are provided with a protective layer, and the protective layer comprises at least one of an electrophoretic layer, a powder spraying layer and a spraying layer.

18. The battery device of any one of claims 1-6, wherein, The surrounding wall and the substrate are an integrated stamping structure.

19. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1-18. The battery device comprises the battery device according to any one of claims 1-18.

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