Battery apparatus, electric apparatus, and energy storage apparatus

Abstract

A battery apparatus, an electric apparatus, and an energy storage apparatus. The battery apparatus comprises a housing and a first battery cell assembly; the housing comprises a bottom wall and a first side wall, and the first side wall is connected to the bottom wall; the first battery cell assembly is arranged within the housing; the first side wall has a first surface facing the first battery cell assembly, the first side wall is provided with a collection cavity, and the collection cavity is configured for collecting liquid adhering to the first surface. The described solution enables a battery apparatus to have high reliability.

Description

Battery devices, electrical devices and energy storage devices Cross-references to related applications

[0001] This application claims priority to Chinese patent application CN202411943409.7, filed on December 26, 2024, entitled “Battery Device, Power Consumption Device and Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery device technology, and more specifically, to a battery device, an electrical device, and an energy storage device. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] In the manufacturing process of battery devices, the reliability of the battery device is a crucial issue. Therefore, improving the reliability of battery devices is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] This application provides a battery device, an electrical device, and an energy storage device, which enables the battery device to have high reliability.

[0006] This application is achieved through the following technical solution:

[0007] In a first aspect, embodiments of this application provide a battery device, which includes a housing and a first battery cell assembly; the housing includes a bottom wall and a first side wall, the first side wall being connected to the bottom wall; the first battery cell assembly is disposed within the housing; wherein, the first side wall has a first surface facing the first battery cell assembly, and the first side wall is provided with a collection cavity for collecting liquid adhering to the first surface.

[0008] According to the battery device of the present application embodiment, a collection cavity is provided on the first sidewall. The collection cavity is used to collect liquid (such as condensate) adhering to the first surface. For example, when the temperature difference between the inside and outside of the battery device is large, the condensate adhering to the first surface of the first sidewall can be collected by the collection cavity, reducing the risk of condensate flowing to the bottom wall and reducing the risk of condensate causing electrical insulation failure between the bottom wall and other components (such as battery cells), thereby reducing the risk of short circuit causing safety hazards and improving the reliability of the battery device.

[0009] According to some embodiments of this application, the first sidewall is hollow inside and forms a collection cavity, and a first through hole is provided on the first surface, which communicates with the collection cavity.

[0010] In the above scheme, the collection chamber is formed inside the first sidewall, which can reduce the space occupied inside the box; the first through hole is connected to the collection chamber, which facilitates the entry of liquid adhering to the first surface into the collection chamber, thus facilitating the collection of liquid.

[0011] According to some embodiments of this application, the first through hole has a first end close to the collection cavity and a second end away from the collection cavity, and along the thickness direction of the bottom wall, the second end is away from the bottom wall relative to the first end.

[0012] In the above scheme, along the thickness direction of the bottom wall, the second end is farther away from the bottom wall than the first end, so that the liquid collected in the collection chamber is less likely to flow out of the collection chamber, reducing the risk of the collection chamber overflowing and flowing to the bottom wall.

[0013] According to some embodiments of this application, the first through hole is a strip-shaped hole, and the length direction of the strip-shaped hole, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

[0014] In the above scheme, the length direction of the strip hole, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other, which facilitates the rapid entry of liquid into the collection chamber.

[0015] According to some embodiments of this application, there are multiple first through holes, which are spaced apart along a first direction. The first direction, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

[0016] In the above scheme, multiple first through holes are spaced apart along the first direction, and liquid adhering to the first surface can enter the collection chamber at multiple positions in the first direction, which facilitates the rapid entry of liquid into the collection chamber.

[0017] According to some embodiments of this application, the battery device further includes a first adsorption component for adsorbing liquid, at least a portion of which is disposed within a collection chamber.

[0018] In the above scheme, at least a portion of the first adsorption component is disposed in the collection chamber, which can adsorb the liquid located in the collection chamber, facilitating liquid aggregation.

[0019] According to some embodiments of this application, the housing further includes a flow guide connected to the first sidewall and protruding from the first surface, the flow guide being used to guide liquid flow to the first through hole.

[0020] In the above scheme, the guide is disposed on the first sidewall and protrudes from the first surface, which facilitates the flow of liquid adhering to the first surface to the first through hole, and facilitates the flow of liquid to the collection chamber.

[0021] According to some embodiments of this application, the guide extends along a first direction, and the first direction, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

[0022] In the above scheme, the guide extends along the first direction, which facilitates guiding more liquid into the first through hole in the first direction and helps to prevent the liquid from flowing towards the bottom wall.

[0023] According to some embodiments of this application, the guide extends from the first surface in a direction away from the bottom wall, the guide and the first sidewall form a guide groove, and the first through hole connects the guide groove and the collection chamber.

[0024] In the above scheme, the guide extends from the first surface in a direction away from the bottom wall, which has a good guiding effect on the liquid and can collect more liquid to reduce the risk of the liquid flowing towards the bottom wall.

[0025] According to some embodiments of this application, the guide includes a connecting end and a free end. The connecting end is connected to a first sidewall, and the distance between the guide and the first surface gradually increases from the connecting end to the free end.

[0026] In the above scheme, the distance between the guide and the first surface gradually increases from the connecting end to the free end, which facilitates the guide to form a better guiding effect on the liquid and further facilitates the liquid to flow to the first through hole.

[0027] According to some embodiments of this application, a one-way valve is provided at the first through hole. The one-way valve is configured to allow liquid to flow from the guide channel to the collection chamber and to prevent liquid from flowing from the collection chamber to the guide channel.

[0028] In the above scheme, the one-way valve facilitates the flow of liquid in the guide channel to the collection chamber and prevents the liquid in the collection chamber from flowing into the guide channel, thereby reducing the risk of liquid flowing out of the collection chamber.

[0029] According to some embodiments of this application, the battery device further includes a second adsorption component for adsorbing liquid, at least a portion of which is disposed within a flow channel.

[0030] In the above scheme, the second adsorption component facilitates the collection of liquid into the guide channel, while also preventing other components of the box from entering the guide channel and reducing the risk of blockage of the first through hole.

[0031] According to some embodiments of this application, the guide is connected to one end of the first sidewall near the bottom wall.

[0032] In the above scheme, the guide is connected to the end of the first sidewall near the bottom wall, which can gather more liquid and further reduce the risk of liquid adhering to the first surface flowing to the bottom wall.

[0033] According to some embodiments of this application, the guide element is integrally formed with the first sidewall.

[0034] In the above scheme, the flow guide is integrally formed with the first sidewall, which makes the connection between the flow guide and the first sidewall highly reliable and easy to process and manufacture.

[0035] According to some embodiments of this application, the first sidewall and the bottom wall are integrally formed.

[0036] In the above scheme, the first sidewall and the bottom wall are integrally formed, which makes the connection between the first sidewall and the bottom wall more reliable and easier to process and manufacture.

[0037] According to some embodiments of this application, the first sidewall and the bottom wall are integrally extruded.

[0038] In the above scheme, the first sidewall and the bottom wall are integrally extruded, resulting in a dense structure and high overall strength.

[0039] According to some embodiments of this application, the battery device further includes a first thermal management component for heat exchange with the first battery cell assembly.

[0040] In the above scheme, the first thermal management component is used to exchange heat with the first battery cell assembly in order to regulate the temperature of the first battery cell assembly and improve the cycle performance of the first battery cell assembly.

[0041] According to some embodiments of this application, a first flow channel is formed inside the bottom wall, the first flow channel is used to contain the heat exchange medium, and the bottom wall is a first thermal management component.

[0042] In the above scheme, the interior of the bottom wall forms a first flow channel, and the bottom wall is a first thermal management component. It can utilize the internal space of the bottom wall, reduce the waste of internal space of the box, and help improve the energy density of the battery device.

[0043] According to some embodiments of this application, the first battery cell assembly includes a plurality of first battery cells stacked along a first direction, the surface of the first battery cell perpendicular to the first direction being the surface with the largest area of ​​the first battery cell; there are two first sidewalls, the two first sidewalls are spaced apart along a second direction, the bottom wall connects the two first sidewalls, the first battery cell assembly is located between the two first sidewalls, and the second direction, the first direction and the thickness direction of the bottom wall are perpendicular to each other.

[0044] In the above scheme, multiple first battery cells are stacked along the first direction, which can improve the space utilization rate inside the box in the first direction, so that the battery device has a high energy density; two first sidewalls are spaced apart along the second direction, the first sidewalls can extend along the first direction, and the collection cavity can be set with a larger size in the first direction in order to collect more liquid.

[0045] According to some embodiments of this application, the housing further includes two second sidewalls spaced apart along a first direction, and two first expansion beams spaced apart along the first direction. The bottom wall connects to the two second sidewalls, the two first expansion beams are located between the two second sidewalls, and the first battery cell assembly is located between the two first expansion beams.

[0046] In the above scheme, the first battery cell assembly is located between the two first expansion beams so that the expansion deformation of the first battery cell assembly can be constrained by the two first expansion beams, which helps to improve the reliability of the battery device; the two second expansion beams are located between the two second side walls so that space for accommodating other electrical components can be formed between the second expansion beams and the corresponding second side walls, which facilitates the rational use of the space inside the box in the first direction.

[0047] According to some embodiments of this application, the battery device further includes a support member and a second battery cell assembly. The support member is disposed inside the housing and divides the interior of the housing into a first accommodating space and a second accommodating space located on both sides of the support member. The first battery cell assembly is disposed in the first accommodating space and supported by the bottom wall. The second battery cell assembly is disposed in the second accommodating space and supported by the support member.

[0048] In the above scheme, the support member divides the interior of the box into a first accommodating space and a second accommodating space. The first battery cell assembly is disposed in the first accommodating space and the second battery cell assembly is disposed in the second accommodating space, so as to improve the space utilization rate of the box in the thickness direction of the bottom wall and facilitate the improvement of the energy density of the battery device.

[0049] According to some embodiments of this application, the battery device further includes a second thermal management component for heat exchange with a second battery cell assembly.

[0050] In the above scheme, the second thermal management component is used to exchange heat with the second battery cell assembly in order to regulate the temperature of the second battery cell assembly and improve the cycle performance of the second battery cell assembly.

[0051] According to some embodiments of this application, a second flow channel is formed inside the support member, the second flow channel is used to contain the heat exchange medium, and the support member is a second thermal management component.

[0052] In the above scheme, the support member is a second thermal management component, which can utilize the internal space of the support member to reduce the waste of internal space of the box and help improve the energy density of the battery device; at the same time, the heat exchange medium inside the support member can also regulate the temperature of the first housing space, which is beneficial to regulate the temperature of the first battery cell assembly.

[0053] According to some embodiments of this application, the battery device further includes a support member and a second battery cell assembly. The support member is disposed in the housing and divides the interior of the housing into a first accommodating space and a second accommodating space located on both sides of the support member. The first battery cell assembly is disposed in the first accommodating space and connected to the support member. The second battery cell assembly is disposed in the second accommodating space and supported by the support member.

[0054] In the above scheme, the first battery cell assembly and the second battery cell assembly are connected together to the support, which facilitates the integration of the first battery cell assembly and the second battery cell assembly and makes reasonable use of the space inside the box in the thickness direction of the bottom wall.

[0055] According to some embodiments of this application, a second flow channel is formed inside the support member, the second flow channel being used to contain a heat exchange medium for heat exchange between the first battery cell assembly and the second battery cell assembly.

[0056] In the above scheme, the temperature of the first battery cell assembly and the second battery cell is regulated by the heat exchange medium set inside the support, which can save components and improve the utilization rate of the internal space of the box.

[0057] According to some embodiments of this application, the battery device further includes an adhesive layer, through which the first battery cell assembly is connected to the bottom wall.

[0058] In the above scheme, the first battery cell assembly is connected to the bottom wall through an adhesive layer, which facilitates assembly and ensures a firm connection between the first battery cell assembly and the bottom wall.

[0059] According to some embodiments of this application, the housing also includes a mounting beam connected to the side of the first side wall away from the first battery cell assembly. The mounting beam is provided with a mounting part for mounting the battery device to the main body of the electrical device.

[0060] In the above scheme, by setting a mounting beam on the side of the first sidewall away from the first battery cell assembly, it is convenient to connect the battery device to the main body of the power-consuming device.

[0061] Secondly, embodiments of this application also provide an electrical device, which includes a battery device according to any of the above embodiments, the battery device being used to provide electrical energy to the electrical device.

[0062] Thirdly, embodiments of this application also provide an energy storage device, which includes a battery device according to any of the above embodiments, the battery device being used to store electrical energy and capable of providing electrical energy.

[0063] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0064] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0066] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0067] Figure 3 is a cross-sectional view of a battery device provided in some embodiments of this application;

[0068] Figure 4 is a schematic diagram of the structure of the collection cavity of the first sidewall provided in some embodiments of this application;

[0069] Figure 5 is a magnified view of part A in Figure 3;

[0070] Figure 6 is a schematic diagram of the structure of the first through hole provided in some embodiments of this application;

[0071] Figure 7 is a schematic diagram of a partial structure of the box provided in some embodiments of this application;

[0072] Figure 8 is a magnified view of part B in Figure 7;

[0073] Figure 9 is a schematic diagram of the assembly of the first adsorption component and the collection chamber provided in some embodiments of this application;

[0074] Figure 10 is a schematic diagram of the assembly of a one-way valve and a first through hole provided in some embodiments of this application;

[0075] Figure 11 is a schematic diagram of the assembly of the second adsorption component and the guide channel provided in some embodiments of this application;

[0076] Figure 12 is a cross-sectional view of a battery device provided in some other embodiments of this application;

[0077] Figure 13 is a cross-sectional view of a battery device provided in some embodiments of this application;

[0078] Figure 14 is a schematic diagram of the assembly of the first battery cell assembly and the bottom wall provided in some embodiments of this application.

[0079] The accompanying drawings are not drawn to scale.

[0080] Markings: 100 - Battery assembly; 10 - Housing; 10a - First sub-housing housing; 10b - Second sub-housing housing; 10c - First receiving space; 10d - Second receiving space; 11 - Bottom wall; 111 - First flow channel; 12 - First side wall; 121 - First surface; 121a - First through hole; 121b - First end; 121c - Second end; 122 - Collection cavity; 123 - Collection structure; 13 - Flow guide; 131 - Connecting end; 132 - Free end; 14 - Flow guide groove; 15 - Second side wall; 16 - First expansion Beam; 17-Mount beam; 171-Mount part; 18-Cover; 20-Battery cell; 20a-First battery cell assembly; 20b-Second battery cell assembly; 21-First battery cell; 30-First adsorption component; 40-One-way valve; 50-Second adsorption component; 61-First thermal management component; 62-Second thermal management component; 70-Support component; 71-Second flow channel; 80-Adhesive layer; 200-Controller; 300-Motor; 1000-Vehicle; X-First direction; Y-Second direction; Z-Thickness direction of bottom wall. Detailed Implementation

[0081] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0082] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0083] The terms "first," "second," etc., in the specification, claims, or the accompanying drawings of this application are used to distinguish different objects, rather than to describe a specific order or primary / secondary relationship.

[0084] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0085] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0086] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0087] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0088] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0089] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0090] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0091] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0092] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0093] As an example, the enclosure may include a first sub-enclosure and a second sub-enclosure. The first and second sub-enclosures are interlocked to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed. The first sub-enclosure may be a top cover or a bottom plate.

[0094] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0095] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0096] In some embodiments, the energy storage device includes an energy storage enclosure and a battery unit. At least one side of the energy storage enclosure has a door, and the battery unit is housed within the energy storage enclosure. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0097] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0098] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0099] As an example, a battery cell can be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0100] The development of battery device technology must take into account multiple design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge rate. In addition, the reliability of the battery device also needs to be considered.

[0101] In some embodiments, when there is a large temperature difference between the inside and outside of the battery device housing, condensation is likely to form on the inner surface of the housing wall. The condensation is likely to flow down the side wall to the bottom wall under the action of gravity. After the condensation accumulates on the bottom wall, it is likely to cause electrical insulation failure between the bottom wall and other components connected to the bottom wall (such as battery cells), which can easily cause short circuits and make the battery device less reliable.

[0102] In view of this, to solve the problem of condensate flowing towards the bottom wall, causing electrical insulation failure between the bottom wall and other components and resulting in a short circuit, this application provides a battery device, which includes a housing and a first battery cell assembly; the housing includes a bottom wall and a first side wall, the first side wall being connected to the bottom wall; the first battery cell assembly is disposed within the housing; wherein, the first side wall has a first surface facing the first battery cell assembly, and the first side wall is provided with a collection cavity for collecting liquid adhering to the first surface. This battery device has high reliability.

[0103] In such a battery device, a collection chamber is provided on the first sidewall. The collection chamber is used to collect liquid (such as condensate) adhering to the first surface. For example, when there is a large temperature difference between the inside and outside of the battery device, the condensate adhering to the first surface of the first sidewall can be collected by the collection chamber, reducing the risk of condensate flowing to the bottom wall and reducing the risk of condensate causing electrical insulation failure between the bottom wall and other components (such as battery cells). This reduces the risk of short circuits causing safety hazards and improves the reliability of the battery device.

[0104] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

[0105] The technical solutions described in the embodiments of this application are applicable to various power devices or energy storage devices that use battery devices.

[0106] Electrical devices can include mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, such as airplanes, rockets, space shuttles, and spacecraft.

[0107] Energy storage devices can include energy storage containers or energy storage cabinets. They can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours.

[0108] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0109] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0110] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0111] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0112] Please refer to Figure 2, which is an exploded view of the structure of a battery device provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10. The housing 10 provides space for the battery cells 20, and the housing 10 can adopt various structures.

[0113] In some embodiments, the housing 10 may include a first sub-housing 10a and a second sub-housing 10b, which overlap each other, and together define a receiving space for accommodating the battery cell 20. The second sub-housing 10b may be a hollow structure with one end open, and the first sub-housing 10a may be a plate-like structure, with the first sub-housing 10a covering the open side of the second sub-housing 10b so that the first sub-housing 10a and the second sub-housing 10b together define the receiving space; alternatively, the first sub-housing 10a and the second sub-housing 10b may both be hollow structures with one side open, with the open side of the first sub-housing 10a covering the open side of the second sub-housing 10b.

[0114] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 20 is housed in the housing 10. Alternatively, the battery device 100 can also be formed by first connecting multiple battery cells 20 in series, in parallel, or in a mixed manner to form a battery cell 20 module, and then connecting multiple battery cell 20 modules in series, in parallel, or in a mixed manner to form a whole, which is also housed in the housing 10.

[0115] The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar for realizing electrical connection between multiple battery cells 20.

[0116] Please refer to Figure 2, and further refer to Figures 3 and 5. Figure 3 is a cross-sectional view of a battery device provided in some embodiments of this application, and Figure 4 is a structural schematic diagram of the collection cavity of the first sidewall provided in some embodiments of this application. This application provides a battery device 100, which includes a housing 10 and a first battery cell assembly 20a. The housing 10 includes a bottom wall 11 and a first sidewall 12, the first sidewall 12 being connected to the bottom wall 11. The first battery cell assembly 20a is disposed within the housing 10. The first sidewall 12 has a first surface 121 facing the first battery cell assembly 20a, and the first sidewall 12 is provided with a collection cavity 122 for collecting liquid adhering to the first surface 121.

[0117] The housing 10 is used to provide a storage space in which the first battery cell assembly 20a is housed.

[0118] In some embodiments, the first battery cell assembly 20a may be supported on the bottom wall 11, or the first battery cell assembly 20a may be spaced apart from the bottom wall 11, or the first battery cell assembly 20a may be connected to other walls of the housing 10 or other structures within the housing 10.

[0119] There are various ways to connect the first sidewall 12 and the bottom wall 11. For example, the first sidewall 12 can be welded to the bottom wall 11, or the first sidewall 12 can be integrally formed with the bottom wall 11, such as by stamping or integral extrusion molding.

[0120] The first battery cell assembly 20a may include a plurality of first battery cells 21, which may be connected in series, in parallel, or in a mixed manner.

[0121] The first surface 121 is the surface of the first sidewall 12 facing the first battery cell assembly 20a. That is, when the first sidewall 12, the bottom wall 11, and the other walls of the housing 10 enclose a space for accommodating the first battery cell assembly 20a, the first surface 121 is the surface of the first sidewall 12 that encloses the space.

[0122] The collection chamber 122 is used to collect liquids adhering to the first surface 121. For example, the collection chamber 122 can collect condensate adhering to the first surface 121.

[0123] In some embodiments, referring to FIG3, the collecting cavity 122 can be a cavity disposed inside the first sidewall 12. In other embodiments, referring to FIG4, a collecting structure 123 is disposed on the first surface 121, and the internal space of the collecting structure 123 can form the collecting cavity 122, or the collecting structure 123 can surround the collecting cavity 122 with the first surface 121.

[0124] According to the battery device 100 of the present application embodiment, a collection cavity 122 is provided on the first sidewall 12. The collection cavity 122 is used to collect liquid (such as condensate) adhering to the first surface 121. For example, when the temperature difference between the inside and outside of the battery device 100 is large, the condensate adhering to the first surface 121 of the first sidewall 12 can be collected by the collection cavity 122, reducing the risk of condensate flowing to the bottom wall 11 and reducing the risk of electrical insulation failure between the bottom wall 11 and other components (such as battery cell 20) caused by condensate, thereby reducing the risk of short circuit causing safety hazards and improving the reliability of the battery device 100.

[0125] Please refer to Figure 3, and further refer to Figure 5, which is a partial enlarged view of point A in Figure 3. According to some embodiments of this application, the first sidewall 12 is hollow inside and forms a collection cavity 122, and the first surface 121 is provided with a first through hole 121a, which communicates with the collection cavity 122.

[0126] In some embodiments, the first sidewall 12 may include a first wall and a second wall spaced apart along the thickness direction of the first sidewall 12, the first wall and the second wall defining a collection cavity 122, the first wall being closer to the first battery cell assembly 20a relative to the second wall, the first surface 121 being located on the first body, and the first through hole 121a penetrating the first wall along the thickness direction of the first sidewall 12.

[0127] The first sidewall 12 may also include reinforcing ribs that connect the first wall and the second wall to improve the overall strength of the first sidewall 12.

[0128] In some embodiments, the first sidewall 12 is integrally extruded, for example, the substrate is extruded to form the first sidewall 12 via an extrusion device.

[0129] In the above scheme, the collection chamber 122 is formed inside the first side wall 12, which can reduce the space occupied inside the box 10; the first through hole 121a is connected to the collection chamber 122, which facilitates the liquid adhering to the first surface 121 to enter the collection chamber 122, which is beneficial to the collection of liquid.

[0130] Referring to Figure 5, according to some embodiments of this application, the first through hole 121a has a first end 121b near the collection cavity 122 and a second end 121c away from the collection cavity 122. Along the thickness direction Z of the bottom wall, the second end 121c is away from the bottom wall 11 relative to the first end 121b.

[0131] The first end 121b and the second end 121c are the two opposite ends of the first through hole 121a in its extending direction. The liquid adhering to the first surface 121 enters the first through hole 121a through the second end 121c and enters the collection chamber 122 from the first end 121b.

[0132] The extension trajectory of the first through hole 121a can be a straight line or a curve. Optionally, the extension trajectory of the first through hole 121a is a straight line, which is convenient for processing and manufacturing.

[0133] The second end 121c is farther away from the bottom wall 11 than the first end 121b. On the one hand, this facilitates the entry of liquid adhering to the first surface 121 into the collection chamber 122 through the first through hole 121a. On the other hand, when the collection chamber 122 contains liquid, the liquid level in the collection chamber 122 can be higher, so that the collection chamber 122 can collect a larger volume of liquid.

[0134] In some embodiments, the bottom wall 11 has a second surface and a third surface disposed opposite to each other along the thickness direction Z of the bottom wall, and the first battery cell assembly 20a is supported on the second surface; the collection cavity 122 extends beyond the second surface in the direction from the second surface to the third surface, so that the collection cavity 122 can have a large capacity.

[0135] In the above scheme, along the thickness direction Z of the bottom wall, the second end 121c is farther away from the bottom wall 11 than the first end 121b, so that the liquid contained in the collection cavity 122 is less likely to flow out of the collection cavity 122, reducing the risk of the collection cavity 122 overflowing and flowing to the bottom wall 11.

[0136] Please refer to Figure 6, which is a schematic diagram of the structure of the first through hole provided in some embodiments of this application. According to some embodiments of this application, the first through hole 121a is a strip-shaped hole, and the length direction of the strip-shaped hole, the thickness direction of the first sidewall 12, and the thickness direction Z of the bottom wall are perpendicular to each other.

[0137] A strip-shaped hole can also be called a waist-shaped hole, an oblong hole, etc.

[0138] In some embodiments, the length direction of the strip hole can be parallel to the length direction of the first sidewall 12, and the first through hole 121a has a larger size in the length direction of the first sidewall 12 so that the liquid adhering to the first surface 121 can enter the first through hole 121a.

[0139] The first through hole 121a is a strip-shaped hole, which allows for a larger size along the length of the strip-shaped hole, facilitating the entry of liquid adhering to the first surface 121 into the first through hole 121a, thereby facilitating the rapid entry of liquid into the collection chamber 122.

[0140] Please refer to Figures 7 and 8. Figure 7 is a schematic diagram of a partial structure of the box provided in some embodiments of this application, and Figure 8 is a partial enlarged view of point B in Figure 7. According to some embodiments of this application, there are multiple first through holes 121a, and the multiple first through holes 121a are spaced apart along the first direction X. The first direction X, the thickness direction of the first sidewall 12, and the thickness direction Z of the bottom wall are perpendicular to each other.

[0141] In some embodiments, the distance between any two adjacent first through holes 121a along the first direction X is equal, which facilitates processing and manufacturing and allows liquid to quickly enter the collection chamber 122.

[0142] In some embodiments, the first direction X may be parallel to the length direction of the first sidewall 12.

[0143] In the above scheme, multiple first through holes 121a are spaced apart along the first direction X, and the liquid adhering to the first surface 121 can enter the collection chamber 122 at multiple positions in the first direction X, which facilitates the rapid entry of the liquid into the collection chamber 122.

[0144] Please refer to Figure 9, which is a schematic diagram of the assembly of the first adsorption component and the collection chamber according to some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a first adsorption component 30 for adsorbing liquid, at least a portion of which is disposed within the collection chamber 122.

[0145] The first adsorption component 30 is a component used to adsorb liquid. The first adsorption component 30 can be a porous structure, such as activated carbon filter cotton, activated carbon filter screen, honeycomb ceramic filter material, etc.

[0146] In some embodiments, the entire first adsorption component 30 may be located inside the collection chamber 122, or a portion of the first adsorption component 30 may be located inside the collection chamber 122 and another portion may be located outside the collection chamber 122.

[0147] In the above scheme, at least a portion of the first adsorption component 30 is disposed in the collection chamber 122, which can adsorb the liquid located in the collection chamber 122, facilitating liquid aggregation.

[0148] Referring to Figures 5 and 7, according to some embodiments of this application, the housing 10 further includes a flow guide 13, which is connected to the first sidewall 12 and protrudes from the first surface 121. The flow guide 13 is used to guide the liquid to flow to the first through hole 121a.

[0149] The flow guide 13 is a component used to guide liquid flow to the first through hole 121a. One end of the flow guide 13 is connected to the first end 121b surface, thereby guiding the liquid flow to the first through hole 121a. For example, the flow guide 13 is set at an angle to the first surface 121, and the end of the flow guide 13 near the bottom wall 11 is connected to the first surface 121. When the liquid adhering to the first surface 121 flows toward the bottom wall 11, the flow guide 13 can prevent the liquid from flowing toward the bottom wall 11 and guide the liquid flow to the first through hole 121a.

[0150] In some embodiments, the flow guide 13 may be integrally formed with the first sidewall 12, or the flow guide 13 may be welded to the first sidewall 12.

[0151] In the above scheme, the guide member 13 is disposed on the first side wall 12 and protrudes from the first surface 121, which facilitates the flow of liquid attached to the first surface 121 to the first through hole 121a, and facilitates the flow of liquid to the collection chamber 122.

[0152] Please refer to Figure 7. According to some embodiments of this application, the guide member 13 extends along the first direction X, and the first direction X, the thickness direction of the first sidewall 12, and the thickness direction Z of the bottom wall are perpendicular to each other.

[0153] The length direction of the guide member 13 can be parallel to the length direction of the first sidewall 12, so that the guide member 13 has a large connection area with the first sidewall 12 in the length direction of the first sidewall 12, which facilitates guiding the liquid attached to the first sidewall 12 to flow to the first through hole 121a.

[0154] In some embodiments, the guide member 13 can be plate-shaped, with a simple structure and easy processing and manufacturing. For example, baffles can be provided at both ends of the guide member 13 in the first direction X. The baffles connect the first sidewall 12 and the guide member 13. The baffles cooperate with the guide member 13 to guide the liquid flow to the first through hole 121a, so as to reduce the risk of liquid flowing from the end of the guide member 13 in the first direction X to the bottom wall 11.

[0155] In the above scheme, the guide member 13 extends along the first direction X, which can facilitate guiding more liquid into the first through hole 121a in the first direction X, and help prevent the liquid from flowing toward the bottom wall 11.

[0156] In some embodiments, the distance between the guide member 13 and the bottom wall 11 decreases and then increases along the first direction X. For example, the guide member 13 may be V-shaped to reduce the risk of liquid flowing from the end of the guide member 13 in the first direction X to the bottom wall 11.

[0157] Referring to Figure 5, according to some embodiments of this application, the guide member 13 extends from the first surface 121 in a direction away from the bottom wall 11, and the guide member 13 and the first side wall 12 form a guide groove 14, and the first through hole 121a connects the guide groove 14 and the collection cavity 122.

[0158] The flow channel 14 is a channel formed by the flow guide 13 and the first surface 121.

[0159] The guide member 13 extends from the first surface 121 in a direction away from the bottom wall 11, which can play a good guiding role for the liquid attached to the first surface 121. At the same time, it can also make the guide groove 14 have a large volume, and the guide groove 14 can hold more liquid, which is conducive to guiding the liquid to the first through hole 121a.

[0160] In the above scheme, the guide member 13 extends from the first surface 121 in a direction away from the bottom wall 11, which has a good guiding effect on the liquid and can collect more liquid to reduce the risk of the liquid flowing towards the bottom wall 11.

[0161] Referring to Figure 5, according to some embodiments of this application, the flow guide 13 includes a connecting end 131 and a free end 132. The connecting end 131 is connected to the first sidewall 12. From the connecting end 131 to the free end 132, the distance between the flow guide 13 and the first surface 121 gradually increases.

[0162] The connecting end 131 is the end of the guide member 13 used to connect with the first side wall 12, and the free end 132 can be the end of the guide member 13 that forms the opening of the guide groove 14.

[0163] The connection between the connecting end 131 and the first sidewall 12 can be in various ways. For example, the connecting end 131 and the first sidewall 12 can be integrally formed, or the connecting end 131 and the first sidewall 12 can be welded together.

[0164] "From the connecting end 131 to the free end 132, the distance between the guide member 13 and the first surface 121 gradually increases" can mean that the width of the guide groove 14 gradually increases from the connecting end 131 to the free end 132, and the guide groove 14 has a large opening to facilitate the entry of liquid into the guide groove 14.

[0165] In the above scheme, from the connecting end 131 to the free end 132, the distance between the guide member 13 and the first surface 121 gradually increases, which facilitates the guide member 13 to form a better guiding effect on the liquid, and further facilitates the liquid to flow to the first through hole 121a.

[0166] Please refer to Figure 10, which is a schematic diagram of the assembly of a one-way valve and a first through hole provided in some embodiments of this application. According to some embodiments of this application, a one-way valve 40 is provided at the first through hole 121a. The one-way valve 40 is configured to allow liquid to flow from the guide channel 14 to the collection chamber 122 and to prevent liquid from flowing from the collection chamber 122 to the guide channel 14.

[0167] The one-way valve 40, also known as a check valve or non-return valve, only allows liquid to flow from the inlet to the outlet and prevents liquid from flowing from the outlet to the inlet.

[0168] The one-way valve 40 can be located at the first end 121b of the first through hole 121a, or at the second end 121c of the first through hole 121a, or between the first end 121b and the second end 121c.

[0169] In the above scheme, the one-way valve 40 is set to facilitate the flow of liquid in the guide channel 14 to the collection chamber 122 and prevent the liquid in the collection chamber 122 from flowing to the guide channel 14, so as to reduce the risk of liquid flowing out of the collection chamber 122.

[0170] Please refer to Figure 11, which is a schematic diagram of the assembly of the second adsorption component and the guide channel provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a second adsorption component 50 for adsorbing liquid, at least a portion of which is disposed within the guide channel 14.

[0171] The second adsorption component 50 is a component used to adsorb liquid. The second adsorption component 50 can be a porous structure, such as activated carbon filter cotton, activated carbon filter screen, honeycomb ceramic filter material, etc.

[0172] In some embodiments, the entire second adsorption component 50 may be located within the flow channel 14, or a portion of the second adsorption component 50 may be located within the flow channel 14, while another portion of the second adsorption component 50 may be located outside the flow channel 14.

[0173] In some embodiments, the second adsorption component 50 may be disposed at the opening of the guide channel 14, and may form a blocking structure at the opening of the guide channel 14 to block impurities (such as dust, solid particles, adhesives, etc.) from entering the guide channel 14.

[0174] In some embodiments, the first battery cell assembly 20a is bonded to the bottom wall 11 with insulating adhesive. When the first battery cell assembly 20a is assembled with the bottom wall 11, the insulating adhesive is fluid before it solidifies. The second adsorption component 50 can prevent the insulating adhesive from entering the guide groove 14, reducing the risk of the insulating adhesive clogging the first through hole 121a.

[0175] In the above scheme, the second adsorption component 50 is provided to facilitate the collection of liquid into the guide channel 14. At the same time, it can also prevent other components of the box 10 from entering the guide channel 14, reducing the risk of blockage of the first through hole 121a.

[0176] Please refer to Figures 5, 9 to 11. According to some embodiments of this application, the guide member 13 is connected to one end of the first sidewall 12 near the bottom wall 11.

[0177] In some embodiments, the connecting end 131 of the guide member 13 can be connected to the connection between the first sidewall 12 and the bottom wall 11, which can largely block the liquid adhering to the first surface 121 from flowing toward the bottom wall 11.

[0178] In the above scheme, the guide 13 is connected to the end of the first sidewall 12 near the bottom wall 11, which can gather more liquid and further reduce the risk of liquid adhering to the first surface 121 flowing to the bottom wall 11.

[0179] According to some embodiments of this application, the flow guide 13 is integrally formed with the first sidewall 12.

[0180] The flow guide 13 can be cast with the first sidewall 12, or the flow guide 13 can be integrally extruded with the first sidewall 12.

[0181] Optionally, the guide member 13 and the first sidewall 12 can be made of aluminum alloy, which has good processing properties, facilitating the integral extrusion molding of the guide member 13 and the first sidewall 12. After the integral extrusion molding of the guide member 13 and the first sidewall 12, a first through hole 121a is formed on the first surface 121 of the first sidewall 12 to connect the collection chamber 122 and the guide channel 14. For example, the guide member 13 and the first sidewall 12 are extruded from the substrate along the first direction X. The first sidewall 12 has openings at both ends in the first direction X, which are sealed by a sealing plate to reduce the risk of liquid leakage from the collection chamber 122.

[0182] In the above scheme, the flow guide 13 is integrally formed with the first side wall 12, which makes the connection between the flow guide 13 and the first side wall 12 highly reliable and easy to process and manufacture.

[0183] According to some embodiments of this application, the first sidewall 12 and the bottom wall 11 are integrally formed.

[0184] The first sidewall 12 can be cast together with the bottom wall 11, or the first sidewall 12 can be integrally extruded together with the bottom wall 11.

[0185] In the above scheme, the first sidewall 12 and the bottom wall 11 are integrally formed, which makes the connection between the first sidewall 12 and the bottom wall 11 highly reliable and easy to process and manufacture.

[0186] According to some embodiments of this application, the first sidewall 12 and the bottom wall 11 are integrally extruded.

[0187] The first sidewall 12 and the bottom wall 11 can be made of aluminum alloy, which has good processing performance, so that the first sidewall 12 and the bottom wall 11 can be integrally extruded.

[0188] In the above scheme, the first sidewall 12 and the bottom wall 11 are integrally extruded and formed, resulting in a dense structure and high overall strength.

[0189] Referring to Figure 3, according to some embodiments of this application, the battery device 100 further includes a first thermal management component 61, which is used for heat exchange with the first battery cell assembly 20a.

[0190] The first thermal management component 61 can be constructed as a tubular structure or a plate structure. The interior of the first thermal management component 61 has a flow channel for containing the heat exchange medium. The heat exchange medium flows in the flow channel in the first thermal management component 61 to regulate the temperature of the first battery cell assembly 20a.

[0191] In some embodiments, the first thermal management component 61 may be a water-cooled plate.

[0192] In the above scheme, the first thermal management component 61 is used to exchange heat with the first battery cell assembly 20a in order to regulate the temperature of the first battery cell assembly 20a and improve the cycle performance of the first battery cell assembly 20a.

[0193] In some embodiments, referring to Figure 3, the first battery cell assembly 20a can be supported on the bottom wall 11. During the assembly of the battery device 100, the first battery cell assembly 20a is disposed inside the housing 10 and is supported by the bottom wall 11.

[0194] Referring to Figure 3, according to some embodiments of this application, a first flow channel 111 is formed inside the bottom wall 11. The first flow channel 111 is used to contain the heat exchange medium, and the bottom wall 11 is a first thermal management component 61.

[0195] The heat exchange medium can be liquid or gas.

[0196] The heat exchange medium can be water, alcohol, or other liquid mixtures.

[0197] The bottom wall 11 can be a hollow structure, so that the interior of the bottom wall 11 forms a first flow channel 111. The heat exchange medium is contained in the first flow channel 111. The bottom wall 11 can have good thermal conductivity, and the temperature of the heat exchange medium is transferred to the first battery cell assembly 20a through the bottom wall 11 to regulate the temperature of the first battery cell assembly 20a.

[0198] For example, in an embodiment where the first battery cell assembly 20a is disposed on the bottom wall 11, the bottom wall 11 supports the first battery cell assembly 20a, and the heat exchange medium disposed inside the bottom wall 11 can regulate the temperature of the first battery cell assembly 20a through the bottom wall 11, which is beneficial for the first battery cell assembly 20a to dissipate heat or heat.

[0199] In the above scheme, a first flow channel 111 is formed inside the bottom wall 11, and the bottom wall 11 is a first thermal management component 61. The internal space of the bottom wall 11 can be utilized to reduce the waste of internal space of the housing 10, which is conducive to improving the energy density of the battery device 100.

[0200] Referring to Figures 2 and 7, according to some embodiments of this application, the first battery cell assembly 20a includes a plurality of first battery cells 21 stacked along the first direction X, and the surface of the first battery cell 21 perpendicular to the first direction X is the surface with the largest area of ​​the first battery cell 21; there are two first sidewalls 12, which are spaced apart along the second direction Y, and the bottom wall 11 connects the two first sidewalls 12. The first battery cell assembly 20a is located between the two first sidewalls 12, and the second direction Y, the first direction X and the thickness direction Z of the bottom wall are perpendicular to each other.

[0201] Multiple first battery cells 21 are stacked along the first direction X, and the surface of the first battery cell 21 perpendicular to the first direction X is the surface with the largest area of ​​the first battery cell 21. The first battery cell assembly 20a has a compact structure and high energy density.

[0202] Two first sidewalls 12 are spaced apart along a second direction Y, which can be parallel to the thickness direction of the first sidewalls 12.

[0203] The bottom wall 11 is connected to two first side walls 12 at both ends in the second direction Y, so that the space enclosed by the bottom wall 11 and the two first side walls 12 has a large capacity.

[0204] The first battery cell assembly 20a is located between two first sidewalls 12. The two first sidewalls 12 can form a protective structure for the first battery cell assembly 20a in the second direction Y, so as to reduce the risk of damage to the first battery cell assembly 20a.

[0205] In the above scheme, multiple first battery cells 21 are stacked along the first direction X, which can improve the space utilization rate inside the housing 10 in the first direction X, so that the battery device 100 has a higher energy density; two first sidewalls 12 are spaced apart along the second direction Y, the first sidewalls 12 can extend along the first direction X, and the collection cavity 122 can be set with a larger size in the first direction X, so as to collect more liquid.

[0206] Referring to Figures 2 and 7, according to some embodiments of this application, the housing 10 further includes two second sidewalls 15 spaced apart along the first direction X, and two first expansion beams 16 spaced apart along the first direction X. The bottom wall 11 connects the two second sidewalls 15, the two first expansion beams 16 are located between the two second sidewalls 15, and the first battery cell assembly 20a is located between the two first expansion beams 16.

[0207] The two second sidewalls 15, the two first sidewalls 12, and the bottom wall 11 form a space with an opening at one end, so that the first battery cell assembly 20a can enter the space.

[0208] Along the first direction X, two first expansion beams 16 are located between two second sidewalls 15. The two first expansion beams 16 are parallel to each other, and the first expansion beams 16 and the second sidewalls 15 are parallel to each other, so that there is a large space between the two first expansion beams 16 and between the first expansion beams 16 and the second sidewalls 15.

[0209] The first battery cell assembly 20a is located between two first expansion beams 16. The two first expansion beams 16 can absorb the expansion force of the first battery cell assembly 20a and constrain the deformation of the first battery cell assembly 20a.

[0210] In the embodiment where the guide member 13 and the first sidewall 12 form a guide channel 14, the two opposite ends of the guide member 13 along the first direction X can be sealed to the two first expansion beams 16 respectively, so as to reduce the risk of liquid contained in the guide channel 14 flowing toward the bottom wall 11 through the end of the guide member 13 in the first direction X.

[0211] In the above scheme, the first battery cell assembly 20a is located between the two first expansion beams 16 so as to constrain the expansion deformation of the first battery cell assembly 20a by the two first expansion beams 16, which helps to improve the reliability of the battery device 100; the two second expansion beams are located between the two second side walls 15 so as to form a space to accommodate other electrical components between the second expansion beams and the corresponding second side walls 15, which facilitates the rational use of the space inside the housing 10 in the first direction X.

[0212] In some embodiments, the battery device 100 may have a single-layer battery cell assembly, or the battery device 100 may have a multi-layer battery cell assembly, wherein the multi-layer battery cell assembly is arranged along the thickness direction Z of the bottom wall.

[0213] Please refer to Figure 12, which is a cross-sectional view of a battery device provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a support member 70 and a second battery cell assembly 20b. The support member 70 is disposed within the housing 10 and divides the interior of the housing 10 into a first receiving space 10c and a second receiving space 10d located on both sides of the support member 70. The first battery cell assembly 20a is disposed in the first receiving space 10c and supported by the bottom wall 11. The second battery cell assembly 20b is disposed in the second receiving space 10d and supported by the support member 70.

[0214] The support member 70 is disposed inside the box 10 and connected to the box 10. The support member 70 and the bottom wall 11 are spaced apart along the thickness direction Z of the bottom wall. The support member 70 cooperates with the box 10 to divide the interior of the box 10 into a first accommodating space 10c and a second accommodating space 10d. The thickness direction of the support member 70 is parallel to the thickness direction Z of the bottom wall. The first accommodating space 10c and the second accommodating space 10d are distributed along the thickness direction Z of the bottom wall.

[0215] The support member 70 is a component used to support the second battery cell assembly 20b, which is housed within the second receiving space 10d and supported by the support member 70, facilitating the assembly and positioning of the second battery cell assembly 20b. In some embodiments, the second battery cell assembly 20b and the support member 70 are bonded together with an adhesive layer, which is simple to operate and easy to assemble; wherein, the adhesive layer can be an insulating adhesive.

[0216] In some embodiments, the support member 70 has a certain strength, and the material of the support member 70 can be metal, such as steel, aluminum, aluminum alloy, etc.

[0217] In some embodiments, the second battery cell assembly 20b may include a plurality of second battery cells 20, which may be connected in series, parallel, or mixed. The second battery cells 20 may be the same as the first battery cell 21.

[0218] In the above scheme, the support member 70 divides the interior of the housing 10 into a first accommodating space 10c and a second accommodating space 10d. The first battery cell assembly 20a is disposed in the first accommodating space 10c, and the second battery cell assembly 20b is disposed in the second accommodating space 10d, so as to improve the space utilization rate of the interior of the housing 10 in the thickness direction Z of the bottom wall and facilitate the improvement of the energy density of the battery device 100.

[0219] According to some embodiments of this application, the battery device 100 further includes a second expansion beam disposed on the support member 70. There are two second expansion beams, which are spaced apart along the first direction X. The second battery cell assembly 20b is located between the two second expansion beams. The two second expansion beams are used to absorb the expansion force of the second battery cell assembly 20b and constrain the expansion deformation of the second battery cell assembly 20b.

[0220] Referring to Figure 12, according to some embodiments of this application, the battery device 100 further includes a second thermal management component 62, which is used for heat exchange with the second battery cell assembly 20b.

[0221] The second thermal management component 62 can be constructed as a tubular structure or a plate structure. The interior of the second thermal management component 62 has a flow channel for containing the heat exchange medium. The heat exchange medium flows in the flow channel within the second thermal management component 62 to regulate the temperature of the second battery cell assembly 20b.

[0222] In some embodiments, the second thermal management component 62 may be a water-cooled plate.

[0223] In the above scheme, the second thermal management component 62 is used to exchange heat with the second battery cell assembly 20b in order to regulate the temperature of the second battery cell assembly 20b and improve the cycle performance of the second battery cell assembly 20b.

[0224] Referring to Figure 12, according to some embodiments of this application, a second flow channel 71 is formed inside the support member 70, the second flow channel 71 is used to contain the heat exchange medium, and the support member 70 is a second thermal management component 62.

[0225] The support member 70 can be a hollow structure, so that a second flow channel 71 is formed inside the support member 70. The heat exchange medium is contained in the second flow channel 71. The support member 70 can have good thermal conductivity, and the temperature of the heat exchange medium is transferred to the second battery cell assembly 20b through the support member 70 to regulate the temperature of the second battery cell assembly 20b.

[0226] In the above scheme, the support member 70 is the second thermal management component 62, which can utilize the internal space of the support member 70 to reduce the waste of internal space of the housing 10 and help improve the energy density of the battery device 100; at the same time, the heat exchange medium inside the support member 70 can also regulate the temperature of the first housing space 10c, which helps to regulate the temperature of the first battery cell assembly 20a.

[0227] According to some embodiments of this application, please refer to Figures 2, 7 and 12. The bottom wall 11, the two first side walls 12 and the two second side walls 15 constitute the lower housing. The housing 10 also includes a cover 18, which is connected to the two first side walls 12 and the two second side walls 15. The cover 18 and the lower housing are interlocked to form a first housing space 10c for accommodating the first battery cell assembly 20a and a second housing space 10d for accommodating the second battery cell assembly 20b.

[0228] Please refer to Figure 13, which is a cross-sectional view of a battery device provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a support member 70 and a second battery cell assembly 20b. The support member 70 is disposed within the housing 10 and divides the interior of the housing 10 into a first receiving space 10c and a second receiving space 10d located on both sides of the support member 70. The first battery cell assembly 20a is disposed in the first receiving space 10c and connected to the support member 70. The second battery cell assembly 20b is disposed in the second receiving space 10d and supported by the support member 70.

[0229] The support member 70 is disposed inside the housing 10. The support member 70 and the bottom wall 11 are spaced apart along the thickness direction Z of the bottom wall. The first accommodating space 10c and the second accommodating space 10d are distributed spaced apart along the thickness direction Z of the bottom wall.

[0230] In some embodiments, the first battery cell assembly 20a is spaced apart from the bottom wall 11 along the thickness direction Z of the bottom wall to reduce the risk of interference between the first battery cell assembly 20a and the bottom wall 11.

[0231] During the assembly of the battery device 100, the first battery cell assembly 20a and the second battery cell assembly 20b are respectively disposed on both sides of the support member 70, and the first battery cell assembly 20a and the second battery cell assembly 20b can be mirrored.

[0232] In some embodiments, the first battery cell assembly 20a may be bonded to the support member 70, and the second battery cell assembly 20b may be bonded to the support member 70, so as to facilitate the positioning of the first battery cell assembly 20a and the second battery cell assembly 20b.

[0233] In the above scheme, the first battery cell assembly 20a is connected to the support member 70, and the second battery cell assembly 20b is supported on the support member 70, so that the first battery cell assembly 20a and the second battery cell assembly 20b are integrated into the support member 70, which can make reasonable use of the space inside the housing 10 in the thickness direction Z of the bottom wall.

[0234] According to some embodiments of this application, a second flow channel 71 is formed inside the support member 70. The second flow channel 71 is used to contain a heat exchange medium for heat exchange between the first battery cell assembly 20a and the second battery cell assembly b.

[0235] The second flow channel 71 contains a heat exchange medium, making the support member 70 a thermal management component, and the first battery cell assembly 20a and the second battery cell assembly 20b share the same thermal management component.

[0236] In the above scheme, the first battery cell assembly 20a and the second battery cell assembly 20b are connected to the support member 70, and the temperature of the first battery cell assembly 20a and the second battery cell assembly 20b is regulated by the support member 70, which can save parts and improve the utilization rate of the internal space of the housing 10.

[0237] Please refer to Figure 14, which is a schematic diagram of the assembly of the first battery cell assembly and the bottom wall according to some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes an adhesive layer 80, through which the first battery cell assembly 20a and the bottom wall 11 are connected.

[0238] The adhesive layer 80 can be an insulating adhesive layer to reduce the risk of short circuit between the first battery cell assembly 20a and the bottom wall 11.

[0239] When assembling the first battery cell assembly 20a with the bottom wall 11, an insulating adhesive can be applied to the second surface of the bottom wall 11 first, and then the first battery cell assembly 20a can be placed on the insulating adhesive. After the insulating adhesive solidifies, an adhesive layer 80 is formed, so that the first battery cell assembly 20a and the bottom wall 11 are connected through the adhesive layer 80.

[0240] In the above scheme, the first battery cell assembly 20a is connected to the bottom wall 11 through the adhesive layer 80, which facilitates assembly and ensures that the first battery cell assembly 20a is firmly connected to the bottom wall 11.

[0241] Referring to Figures 2 and 7, according to some embodiments of this application, the housing 10 further includes a mounting beam 17, which is connected to the side of the first side wall 12 away from the first battery cell assembly 20a. The mounting beam 17 is provided with a mounting part 171, which is used to mount the battery device 100 to the power device body.

[0242] In some embodiments, the mounting beam 17 extends along the first direction X so that the battery device 100 has a large connection area with the power device body in the first direction X, so as to improve the connection stability between the battery device 100 and the power device body.

[0243] In some embodiments, the mounting beam 17 and the first side wall 12 can be integrally formed so that the mounting beam 17 and the first side wall 12 are firmly connected and the structure formed by the mounting beam 17 and the first side wall 12 has high overall strength.

[0244] In some embodiments, the mounting beam 17 may be welded to the first sidewall 12 so that the mounting beam 17 is securely connected to the first sidewall 12.

[0245] The mounting part 171 is a part of the battery device 100 used to connect to the main body of the power device. The mounting part 171 can be a hole, a protrusion, a buckle, etc.

[0246] When the battery device 100 is applied to the vehicle 1000, the main body of the electrical device can be the frame of the vehicle 1000, that is, the mounting beam 17 is connected to the frame, for example, by bolting the mounting beam 17 to the frame.

[0247] In the above scheme, by setting a mounting beam 17 on the side of the first sidewall 12 away from the first battery cell assembly 20a, it is convenient to connect the battery device 100 to the power device body.

[0248] According to some embodiments of this application, this application also provides an electrical device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to provide electrical energy to the electrical device.

[0249] According to some embodiments of this application, this application also provides an energy storage device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to store electrical energy and capable of providing electrical energy.

[0250] According to some embodiments of this application, please refer to Figures 2 to 14. This application provides a battery device 100, which includes a housing 10 and a first battery cell assembly 20a, the first battery cell assembly 20a being disposed inside the housing 10.

[0251] The housing 10 includes a bottom wall 11 and two first side walls 12 spaced apart along the second direction Y. The bottom wall 11 connects the two first side walls 12, and the first battery cell assembly 20a is located between the two first side walls 12. The bottom wall 11 and the first side walls 12 are integrally extruded.

[0252] The first battery cell assembly 20a includes a plurality of first battery cells 21 spaced apart along the first direction X, and the surface of the first battery cell 21 perpendicular to the first direction X is the surface with the largest area of ​​the first battery cell 21.

[0253] The first sidewall 12 has a first surface 121 facing the first battery cell assembly 20a. The interior of the first sidewall 12 is hollow and forms a collection cavity 122. The first surface 121 is provided with a first through hole 121a, which communicates with the collection cavity 122.

[0254] The housing 10 also includes a flow guide 13, which is connected to the first sidewall 12 and protrudes from the first surface 121. The length direction of the flow guide 13 is parallel to the first direction X. The flow guide 13 extends from the first surface 121 in a direction away from the bottom wall 11, forming a flow channel 14 with the first sidewall 12. A first through hole 121a connects the flow channel 14 and the collection chamber 122. The flow guide 13 guides the liquid adhering to the first surface 121 to flow towards the first through hole 121a, so that the collection chamber 122 collects the liquid. The flow guide 13 extends from the first surface 121 in a direction away from the bottom wall 11, providing good flow guidance and collecting more liquid to reduce the risk of liquid flowing towards the bottom wall 11. The flow guide 13 is integrally formed with the first sidewall 12, resulting in high reliability of the connection between the flow guide 13 and the first sidewall 12 and facilitating manufacturing.

[0255] According to the battery device 100 of this application embodiment, the collection cavity 122 is formed inside the first sidewall 12, which can reduce the space occupied inside the housing 10; the first through hole 121a communicates with the collection cavity 122, and the guide member 13 guides the liquid (such as condensate) attached to the first surface 121 to flow to the first through hole 121a, so that the liquid is collected by the collection cavity 122, reducing the risk of condensate flowing to the bottom wall 11, reducing the risk of condensate causing electrical insulation failure between the bottom wall 11 and other components (such as battery cell 20), thereby reducing the risk of short circuit causing safety hazards and improving the reliability of the battery device 100.

[0256] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: The enclosure includes a bottom wall and a first side wall, the first side wall being connected to the bottom wall; The first battery cell assembly is disposed within the housing; The first sidewall has a first surface facing the first battery cell assembly, and the first sidewall is provided with a collection cavity for collecting liquid adhering to the first surface.

2. The battery device according to claim 1, wherein, The first sidewall is hollow inside to form the collection cavity, and the first surface is provided with a first through hole, which communicates with the collection cavity.

3. The battery device according to claim 2, wherein, The first through hole has a first end close to the collection cavity and a second end away from the collection cavity. Along the thickness direction of the bottom wall, the second end is away from the bottom wall relative to the first end.

4. The battery device according to claim 2 or 3, wherein, The first through hole is a strip-shaped hole, and the length direction of the strip-shaped hole, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

5. The battery device according to any one of claims 2-4, wherein, The number of first through holes is multiple, and the multiple first through holes are spaced apart along a first direction, wherein the first direction, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

6. The battery device according to any one of claims 2-5, wherein, The battery device further includes a first adsorption component for adsorbing the liquid, at least a portion of which is disposed within the collection chamber.

7. The battery device according to any one of claims 2-6, wherein, The housing also includes a flow guide, which is connected to the first side wall and protrudes from the first surface. The flow guide is used to guide the liquid to flow to the first through hole.

8. The battery device according to claim 7, wherein, The flow guide extends along a first direction, and the first direction, the thickness direction of the first sidewall, and the thickness direction of the bottom wall are perpendicular to each other.

9. The battery device according to claim 7 or 8, wherein, The flow guide extends from the first surface in a direction away from the bottom wall, and the flow guide and the first side wall form a flow guide groove. The first through hole connects the flow guide groove and the collection cavity.

10. The battery device according to claim 9, wherein, The flow guide includes a connecting end and a free end. The connecting end is connected to the first sidewall, and the distance between the flow guide and the first surface gradually increases from the connecting end to the free end.

11. The battery device according to claim 9 or 10, wherein, A one-way valve is provided at the first through hole. The one-way valve is configured to allow the liquid to flow from the guide channel to the collection chamber and to prevent the liquid from flowing from the collection chamber to the guide channel.

12. The battery device according to any one of claims 9-11, wherein, The battery device further includes a second adsorption component for adsorbing the liquid, at least a portion of which is disposed within the flow channel.

13. The battery device according to any one of claims 7-12, wherein, The flow guide is connected to one end of the first sidewall near the bottom wall.

14. The battery device according to any one of claims 7-13, wherein, The flow guide is integrally formed with the first sidewall.

15. The battery device according to any one of claims 1-14, wherein, The first sidewall is integrally formed with the bottom wall.

16. The battery device according to claim 15, wherein, The first sidewall and the bottom wall are integrally extruded.

17. The battery device according to any one of claims 1-16, wherein, The battery device further includes a first thermal management component, which is used for heat exchange with the first battery cell assembly.

18. The battery device according to claim 17, wherein, The bottom wall has a first flow channel formed inside, which is used to contain the heat exchange medium. The bottom wall is the first thermal management component.

19. The battery device according to any one of claims 1-18, wherein, The first battery cell assembly includes a plurality of first battery cells stacked along a first direction, wherein the surface of the first battery cell perpendicular to the first direction is the surface with the largest area of ​​the first battery cell; The number of first sidewalls is two, and the two first sidewalls are spaced apart along the second direction. The bottom wall connects the two first sidewalls, and the first battery cell assembly is located between the two first sidewalls. The second direction, the first direction, and the thickness direction of the bottom wall are perpendicular to each other.

20. The battery device according to claim 19, wherein, The housing also includes two second side walls spaced apart along the first direction, and two first expansion beams spaced apart along the first direction. The bottom wall connects to the two second side walls, the two first expansion beams are located between the two second side walls, and the first battery cell assembly is located between the two first expansion beams.

21. The battery device according to any one of claims 1-20, wherein, The battery device further includes a support member and a second battery cell assembly. The support member is disposed inside the housing and divides the interior of the housing into a first accommodating space and a second accommodating space located on both sides of the support member. The first battery cell assembly is disposed in the first accommodating space and supported by the bottom wall. The second battery cell assembly is disposed in the second accommodating space and supported by the support member.

22. The battery device according to claim 21, wherein, The battery device further includes a second thermal management component for heat exchange with the second battery cell assembly.

23. The battery device according to claim 22, wherein, The support member has a second flow channel formed inside, which is used to contain the heat exchange medium. The support member is the second thermal management component.

24. The battery device according to any one of claims 1-20, wherein, The battery device further includes a support member and a second battery cell assembly. The support member is disposed inside the housing and divides the interior of the housing into a first accommodating space and a second accommodating space located on both sides of the support member. The first battery cell assembly is disposed in the first receiving space and connected to the support member. The second battery cell assembly is disposed in the second receiving space and supported by the support member.

25. The battery device according to claim 24, wherein, The support member has a second flow channel inside, which is used to contain a heat exchange medium for heat exchange between the first battery cell assembly and the second battery cell assembly.

26. The battery device according to any one of claims 1-23, wherein, The battery device further includes an adhesive layer, through which the first battery cell assembly is connected to the bottom wall.

27. The battery device according to any one of claims 1-26, wherein, The housing also includes a mounting beam, which is connected to the side of the first side wall away from the first battery cell assembly. The mounting beam is provided with a mounting part, which is used to mount the battery device to the main body of the electrical device.

28. An electrical device comprising a battery device as claimed in any one of claims 1-27, the battery device being used to provide electrical energy to the electrical device.

29. An energy storage device comprising a battery device as claimed in any one of claims 1-27, the battery device being used to store electrical energy and capable of providing electrical energy.

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