Battery device and power utilization device

Abstract

The utility model discloses a battery device and an electric device. The battery device comprises a battery monomer, a heat management assembly and a box body assembly, wherein the heat management assembly is used for carrying out heat management on the battery monomer; the box body assembly comprises a box body main body and a bottom protection plate, a first space is formed in the box body main body, the battery monomers and the heat management assembly are arranged in the first space, the bottom protection plate is connected to one side, deviating from the first space, of the box body main body, at least part of the bottom protection plate is separated from the box body main body to form a second space, and the box body main body is provided with a hole; the hole communicates the first space and the second space. Therefore, the risk of short circuit in the battery device due to the fact that liquid leaked from the heat management assembly is located in the first space for a long time can be reduced, and the reliability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] The battery device is equipped with a thermal management component, which can exchange heat with the battery cells inside the battery device through liquid. However, if the liquid leaking from the thermal management component is not dealt with in time, it can easily cause the liquid to come into contact with the conductors inside the battery device, resulting in a series of problems such as short circuits. Utility Model Content

[0004] The main objective of this application is to provide a battery device and an electrical device that address the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned problems, this application provides a battery device comprising: a battery cell, a thermal management component, and a housing assembly. The thermal management component manages the thermal performance of the battery cell. The housing assembly includes a housing body and a bottom protective plate. The housing body forms a first space, within which the battery cell and the thermal management component are disposed. The bottom protective plate is connected to the side of the housing body opposite to the first space, and at least partially spaced from the housing body to form a second space. The housing body has a hole connecting the first and second spaces. Thus, both the thermal management component and the battery cell are located in the first space, facilitating heat exchange by the thermal management component. The hole allows liquid leaking from the thermal management component to enter the second space, reducing the risk of short circuits caused by prolonged leakage from the thermal management component into the first space, thereby improving the reliability of the battery device.

[0006] In some embodiments, the battery device includes a filter component connected to the housing body and covering the openings. This filter component covering the openings improves the ability of impurities in the second space to enter the first space through the openings, further enhancing the reliability of the battery device.

[0007] In some embodiments, the filter element is connected to the side of the housing body facing the first space. Therefore, connecting the filter element to the side of the housing body facing the first space reduces the difficulty of installing the filter element and reduces the risk of the filter element detaching from the housing body.

[0008] In some embodiments, the number of holes and filter elements is multiple, with each hole covered by at least one filter element. This multiple number of holes and filter elements, with each hole covered by at least one filter element, improves the efficiency of liquid entering the second space from the first space, further reducing the risk of short circuits occurring inside the battery device due to liquid leaking from the thermal management component remaining in the first space for an extended period.

[0009] In some embodiments, the housing body includes a bottom wall, which comprises a central region and an edge region. The battery cells are fixed in the central region, and the holes are located in the edge region. This arrangement, with the battery cells fixed in the central region and the holes located in the edge region, mitigates the risk of interference between the battery cells and the holes, while also reducing the difficulty of molding the battery housing.

[0010] In some embodiments, the number of holes is multiple, and the multiple holes are spaced apart along the direction extending from the edge region. This improves the efficiency of liquid entering the second space from the first space, further reducing the risk of short circuits inside the battery device caused by liquid leaking from the thermal management components remaining in the first space for an extended period.

[0011] In some embodiments, the thermal management assembly includes a busbar and at least one cooling plate. The cooling plate is connected to the busbar and makes contact with a large surface area of ​​the battery cell, which is larger than the other surface areas of the battery cell. This large surface contact between the cooling plate and the battery cell facilitates better thermal management of the battery cell by the thermal management assembly, improving the efficiency of thermal management of the battery cell.

[0012] In some embodiments, the hole corresponds to the connection between the cooling plate and the manifold in the direction of gravity. This alignment facilitates the entry of liquid leaking from the connection into the hole under its own weight, allowing for more efficient liquid entry into the second space and further reducing the risk of short circuits caused by liquid leaking from the thermal management components remaining in the first space for extended periods.

[0013] In some embodiments, the battery device includes a liquid-absorbing component disposed in the second space. This arrangement facilitates the absorption of liquid within the second space, mitigating the risk of liquid flowing back into the first space through the orifice.

[0014] In some embodiments, the main body of the housing includes a side frame and a bottom plate. The side frame is annular, and the bottom plate covers one opening of the side frame. Both the bottom plate and the bottom protective plate are connected to the side frame, and holes are provided in the side frame. Therefore, the connection of the bottom plate and the bottom protective plate to the side frame, with holes located in the side frame, reduces the molding difficulty of the second space, improves production efficiency, and facilitates the disassembly and maintenance of the battery device.

[0015] In some embodiments, the side frame includes a main side frame and a transverse connecting frame. The transverse connecting frame is connected to the main side frame and extends into the first space. The bottom plate of the housing is connected to the transverse connecting frame, and the bottom guard plate is connected to the transverse connecting frame and / or the main side frame. Holes are provided in the transverse connecting frame. Thus, the bottom plate and bottom guard plate are respectively connected to the transverse connecting frame, and the holes are provided in the transverse connecting frame, which can further reduce the forming difficulty of the second space and the holes, and improve production efficiency.

[0016] To address the aforementioned problems, this application provides an electrical device that includes the battery device described above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments;

[0019] Figure 2 This is a schematic diagram of the structure of a battery device according to one or more embodiments of this application;

[0020] Figure 3 It is based on Figure 2 The diagram shows a cross-sectional view of the battery device along the AA direction.

[0021] Figure 4 yes Figure 3 Enlarged view of the structure of the dashed box B in the middle;

[0022] Figure 5 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application;

[0023] Figure 6 yes Figure 5 The diagram shown is a structural schematic of the battery device without the individual battery cells and thermal management components.

[0024] Reference numerals: 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 100. Housing assembly; 110. Housing body; 111. Side frame; 1111. Side frame main frame; 1112. Transverse connecting frame; 112. Housing bottom plate; 113. Housing top cover; 120. Bottom guard plate; 101. First space; 102. Second space; 103. Hole; 130. Bottom wall; 131. Central area; 132. Edge area; 200. Thermal management assembly; 210. Busbar component; 220. Cooling plate; 300. Battery cell; 310. Large surface; 400. Filter component; 500. Liquid absorption component; G. Gravity direction. Detailed Implementation

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular 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 separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0031] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0033] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0034] The battery device is equipped with a thermal management component, which can exchange heat with the battery cells inside the battery device through liquid. However, if the liquid leaking from the thermal management component is not dealt with in time, it can easily cause the liquid to come into contact with the conductors inside the battery device, resulting in a series of problems such as short circuits.

[0035] To address the technical problems existing in related technologies, this application provides an electrical device and a battery device. The battery device includes a battery cell, a thermal management component, and a housing assembly. The housing assembly is provided with a first space for accommodating the battery cell. The battery cell and the thermal management component are located in the first space. The housing assembly is also provided with a second space and a hole that connects the second space and the first space. This can reduce the risk of short circuits caused by liquid leaking from the thermal management component remaining in the first space for a long time, thereby improving the reliability of the battery device.

[0036] This application provides an electrical device, which may include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. The electrical device may include a battery, which can provide electrical power to achieve the corresponding function.

[0037] This application also provides an electric vehicle that may include a battery device.

[0038] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments.

[0039] Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 2 is installed inside vehicle 1, and the battery device 2 can be located at the bottom, front, or rear of vehicle 1. The battery device 2 can be used to power vehicle 1; for example, it can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 3 and a motor 4. The controller 3 controls the battery device 2 to supply power to the motor 4, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0040] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0041] Specifically, see Figures 2 to 4 , Figure 2 This is a schematic diagram of the structure of a battery device according to one or more embodiments of this application. Figure 3 It is based on Figure 2 The diagram shows a cross-sectional view of the battery device along the AA direction. Figure 4 yes Figure 3 Enlarged view of the structure of the dashed box B.

[0042] The battery device 2 includes a battery cell 300, a thermal management component 200, and a housing assembly 100. The thermal management component 200 is used to perform thermal management on the battery cell 300. The housing assembly 100 includes a housing body 110 and a bottom protective plate 120. The housing body 110 forms a first space 101. The battery cell 300 and the thermal management component 200 are disposed in the first space 101. The bottom protective plate 120 is connected to the side of the housing body 110 away from the first space 101. The bottom protective plate 120 is at least partially spaced from the housing body 110 to form a second space 102. The housing body 110 is provided with a hole 103, which connects the first space 101 and the second space 102.

[0043] A battery cell 300 refers to the smallest unit constituting the battery device 2. A battery cell 300 can be, but is not limited to, cylindrical, square, blade-shaped, etc. In the battery device 2, there can be multiple battery cells 300, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells 300 are connected in both series and parallel configurations. Multiple battery cells 300 can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of multiple battery cells 300 is housed within the housing assembly 100. Alternatively, the battery device 2 can also consist of multiple battery cells 300 first connected in series, parallel, or a combination thereof to form battery modules, and then these battery modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within the housing assembly 100. The battery device 2 may also include other structures; for example, it may include a busbar component 210 for electrical connection between multiple battery cells 300. The battery cells 300 are manufactured using two methods: stacked and wound. Stacked batteries offer uniform current collection, low internal resistance, and high specific power. However, achieving high precision requires extremely precise molds, resulting in high equipment investment, complex processes, and low production efficiency. Wound batteries, on the other hand, are simpler to manufacture, with less stringent precision requirements for equipment during sheet fabrication and assembly. They offer high production efficiency and lower costs. In terms of performance, wound batteries boast excellent high and low temperature performance, very rapid charging, ultra-long lifespan, stable high output voltage, and a robust, shock-resistant structure.

[0044] In some cases, the thermal management component 200 may be located at the bottom of the housing assembly 100 and fixedly mounted on the side wall of the housing assembly 100. In other cases, the thermal management component 200 may be at least partially located between adjacent battery cells 300, in close contact with the large surface of the battery cells 300. The battery cells 300 are generally connected to the thermal management component 200 by thermally conductive adhesive to allow heat exchange between the battery cells 300 and the thermal management component 200. When the temperature of the thermal management component 200 changes, the temperature of the battery cells 300 in contact with it also changes, thereby improving the operational reliability and stability of the battery device 2 through the thermal management component 200. Generally, the thermal management component 200 has a fluid that can regulate the temperature of multiple battery cells 300. Here, the fluid can be a liquid, and temperature regulation refers to heating or cooling multiple battery cells 300. When cooling or dissipating heat from the battery cells 300, the thermal management component 200 may be referred to as a cooling component, a cooling system, or a cooling plate 220, etc., and the fluid it contains may also be referred to as a cooling medium or cooling fluid. In addition, the thermal management component 200 can also be used to heat up multiple battery cells 300. The fluid can also be called the heat exchange medium. Optionally, the fluid can be circulated to achieve better temperature regulation. For example, the fluid can be, but is not limited to, water, oil or other liquid fluids.

[0045] The shape of the main body 110 can be set according to actual conditions; for example, the main body 110 can be square, cylindrical, etc. The first space 101 can be a sealed space with good sealing effect, and both the battery cell 300 and the thermal management component 200 can be located in the first space 101. The battery cell 300 can be supported on the bottom of the main body 110, and the thermal management component 200 can be partially fixed to the side wall of the main body 110. At the same time, the remaining part of the thermal management component 200 can contact the battery cell 300; for example, part of the thermal management component 200 can be sandwiched between the large surfaces of two adjacent battery cells 300. The bottom protective plate 120 can be fixedly connected to the main body 110; for example, the bottom protective plate 120 can be integrally formed or welded to the main body 110. The bottom protective plate 120 can also be detachably connected to the main body 110; for example, the bottom protective plate 120 can be detachably connected to the main body 110 by fixing bolts. The bottom protective plate 120 may be located outside the first space 101. For example, the bottom protective plate 120 may be connected to the bottom of the main body 110 of the box. At least a portion of the surface of the bottom protective plate 120 facing the main body 110 of the box may be spaced apart from the main body 110 of the box to form a second space 102. The volume of the second space 102 may be much smaller than the volume of the first space 101. In some embodiments, the second space 102 may be a completely sealed space. The shape and size of the hole 103 may be set according to the actual situation. For example, the shape of the hole 103 may include, but is not limited to, a circle, a square, or an oblong shape.

[0046] The hole 103 can be located on the plate opposite to the bottom guard plate 120 of the housing body 110. The hole 103 can penetrate the opposite surfaces of the plate of the housing body 110, thereby facilitating the connection between the first space 101 and the second space 102. In the event of internal liquid leakage in the thermal management component 200 or the presence of other liquids in the first space 101, the liquid can flow into the second space 102 in a timely manner through the hole 103, reducing the risk of liquid contacting conductive components such as the battery cell 300 due to untreated liquid in the first space 101. In some embodiments, a guide channel can also be formed on the inner sidewall of the housing body 110 facing the first space 101. The guide channel connects to the hole 103, guiding liquids located at different positions into the hole 103.

[0047] In the above-described embodiments, both the thermal management component 200 and the battery cell 300 are located in the first space 101, which facilitates the thermal management component 200 to perform heat exchange treatment on the battery cell 300. The main body 110 of the housing is provided with a hole 103, which connects the first space 101 and the second space 102. The hole 103 allows the liquid leaked from the thermal management component 200 to enter the second space 102, which can reduce the risk of short circuits caused by the liquid leaked from the thermal management component 200 being in the first space 101 for a long time, thereby improving the reliability of the battery device 2.

[0048] The battery device 2 includes a filter component 400, which is connected to the main body 110 and covers the holes 103. The filter component 400 can be configured to allow liquid to pass through but not solid particles. The core principle of the filter component 400 is physical sieving, utilizing the uniform, tiny pores in the material to allow liquid molecules (or small molecule solutes) smaller than the pore size to pass through, while solid particles larger than the pore size are retained. For example, the filter component 400 can include, but is not limited to, filter screens, filter paper, filter cloth, microfiltration membranes, ultrafiltration membranes, reverse osmosis membranes, water-soluble membranes, etc. The filter component 400 can be glued to the main body 110 by adhesive or by heat fusion. The filter component 400 covering the holes 103 improves the entry of impurities in the second space 102 into the first space 101 through the holes 103, further enhancing the reliability of the battery device 2.

[0049] In some embodiments, the filter element 400 is connected to the side of the housing body 110 facing the first space 101. Connecting the filter element 400 to the side of the housing body 110 facing the first space 101 reduces the installation difficulty of the filter element 400 and the risk of the filter element 400 detaching from the housing body 110. Exemplarily, the surface of the housing body 110 facing the first space 101 may have a recessed platform, which surrounds the hole 103. The height of the recessed platform is lower than the inner surface of the adjacent housing body 110. The edge of the filter element 400 can be supported on the recessed platform, and the middle of the filter element 400 covers the hole 103. In some other embodiments, filter elements 400 may be provided at both openings of the hole 103 to further reduce the risk of impurities in the second space 102 entering the first space 101 through the hole 103.

[0050] In some embodiments, there are multiple holes 103 and multiple filter elements 400, with each hole 103 covering at least one filter element 400. The number of holes 103 can be set according to actual conditions; for example, the number of holes 103 can be two, three, four, five, or other more. Multiple holes 103 can be arranged according to specific rules, such as a regular arrangement of multiple holes 103, or holes 103 can be provided at specific positions on the housing body 110. Each hole 103 can be provided with a filter element 400, which can be connected to the side of the housing body 110 facing the first space 101, or the side of the housing body 110 facing the second space 102, or the filter element 400 can be connected to both the side of the housing body 110 facing the first space 101 and the side of the housing body 110 facing the second space 102. Multiple filter elements 400 can also be stacked on top of each hole 103 to further reduce the risk of impurities in the second space 102 entering the first space 101 through the holes 103.

[0051] See further Figure 2 and Figure 3The thermal management assembly 200 includes a busbar 210 and at least one cooling plate 220. The cooling plate 220 is connected to the busbar 210 and contacts the large surface 310 of the battery cell 300. The area of ​​the large surface 310 is larger than the other surface areas of the battery cell 300. The busbar 210 can resemble a pipe structure and is located close to the inner wall of the housing body 110. The busbar 210 can be connected to an external heat exchange system. For example, the busbar 210 may include an inlet and an outlet, which are respectively connected to the heat exchange system. The busbar 210 can receive liquid from the heat exchange system through the inlet and allow the liquid to flow into the heat exchange system through the outlet. The cooling plate 220 can be primarily flat, with one end connected to the busbar 210 and the other end extending to contact the battery cell 300, for example, extending between the large surfaces 310 of two adjacent battery cells 300. The battery cell 300 can be a prismatic cell. For example, the battery cell 300 may include two large surfaces 310 arranged opposite each other and other surfaces connected to the two large surfaces 310. The surface area of ​​the large surfaces 310 is larger than the surface area of ​​the other outer surfaces of the battery cell 300. The cooling plate 220 is in contact with the large surfaces 310 of the battery cell 300, which facilitates the thermal management component 200 in thermal management of the battery cell 300 and improves the thermal management efficiency of the battery cell 300. In some embodiments, the cooling plate 220 may be provided with an inlet and an outlet at the connection point with the manifold 210, and other locations of the cooling plate 220 may be provided with liquid channels. The outlet and inlet of the cooling plate 220 are both connected to the liquid channels and the manifold 210. Liquid in the manifold 210 can enter the liquid channels of the cooling plate 220 through the inlet, and liquid in the liquid channels of the cooling plate 220 can enter the manifold 210 through the outlet, thereby achieving the purpose of replacing the liquid in the cooling plate 220.

[0052] Furthermore, the hole 103 corresponds to the connection point between the cooling plate 220 and the manifold 210 in the direction of gravity G. The manifold 210 may include multiple pipes and a current collector. The multiple pipes can be interconnected through the current collector, and the cooling plate 220 can be connected to the current collector. Correspondingly, the connection point between the manifold 210 and the cooling plate 220 is also the connection point between the cooling plate 220 and the manifold 210. The connection point between the cooling plate 220 and the manifold 210 is more prone to liquid leakage. The hole 103 corresponds to the connection point between the cooling plate 220 and the manifold 210 in the direction of gravity G. That is, it can be understood that the hole 103 is directly below the connection point between the cooling plate 220 and the manifold 210. This facilitates the liquid leaking from the connection point between the cooling plate 220 and the manifold 210 to enter the hole 103 under its own gravity, which can more efficiently allow the liquid to enter the second space 102. This further reduces the risk of short circuits caused by the liquid leaking from the thermal management component 200 remaining in the first space 101 for a long time. In some application scenarios, there can be multiple cooling plates 220. Multiple cooling plates 220 are connected to the confluence component 210 respectively. At least one hole 103 can be provided at the connection point between each cooling plate 220 and the confluence component 210 below the direction of gravity G.

[0053] The battery device 2 includes a liquid-absorbing component 500 disposed in the second space 102. The liquid-absorbing component 500 may be, but is not limited to, cellulose cotton, non-woven fabric, highly absorbent polymer cotton, composite core, sponge, or microfiber, etc. The number of liquid-absorbing components 500 can be set according to actual conditions; for example, there may be one, two, three, or other quantities. The liquid-absorbing component 500 can be fixed in the second space 102 by means of adhesive bonding, or it can be sandwiched between the main body 110 and the bottom protective plate 120. The liquid-absorbing component 500 is disposed in the second space 102 to facilitate the absorption of liquid within the second space 102, reducing the risk of liquid flowing back into the first space 101 through the hole 103.

[0054] The main body 110 of the box includes a side frame 111 and a bottom plate 112. The side frame 111 is annular, and the bottom plate 112 covers one opening of the side frame 111. Both the bottom plate 112 and the bottom guard plate 120 are connected to the side frame 111. A hole 103 is provided in the side frame 111. The specific shape of the side frame 111 can be set according to the actual situation. The internal contour of the side frame 111 is annular, thus making the side frame 111 form a cylindrical structure. The bottom plate 112 can cover one opening of the side frame 111 so that the bottom plate 112 and the side frame 111 can cooperate to form a first space 101. Both the bottom plate 112 and the bottom protective plate 120 of the enclosure can be fixedly connected to the side frame 111. For example, the bottom plate 112, the side frame 111, and the bottom protective plate 120 can be integrally formed, or the bottom plate 112 and the bottom protective plate 120 can be separately formed, and both can be fixedly connected to the side frame 111 by welding, snap-fit, or bolts. The hole 103 is provided in the side frame 111, which can reduce the molding difficulty of the second space 102, improve production efficiency, and facilitate the disassembly and maintenance of the battery device 2.

[0055] In some embodiments, the side frame 111 includes a main side frame 1111 and a transverse connecting frame 1112. The transverse connecting frame 1112 is connected to the main side frame 1111 and extends into the first space 101. The bottom plate 112 of the housing is connected to the transverse connecting frame 1112. The bottom guard plate 120 is connected to the transverse connecting frame 1112 and / or the main side frame 1111. A hole 103 is provided in the transverse connecting frame 1112. The internal contour of the side frame 111 is annular, thus forming a cylindrical structure. The transverse connecting frame 1112 is connected to the main side frame 1111 and extends into the first space 101, so that the cross-section formed by the transverse connecting frame 1112 and the main side frame 1111 is L-shaped. The bottom plate 112 of the enclosure can be connected to the surface of the transverse connecting frame 1112 facing the first space 101, or the bottom plate 112 can be connected to the side wall of the transverse connecting frame 1112 away from the main side frame 1111, or the bottom plate 112 can be connected to the surface of the transverse connecting frame 1112 facing the second space 102. The bottom guard plate 120 can be connected to the surface of the transverse connecting frame 1112 facing the second space 102, or the bottom guard plate 120 can be connected to the surface of the main side frame 1111 facing the second space 102, or the bottom guard plate 120 can be connected to both the surface of the main side frame 1111 facing the second space 102 and the surface of the transverse connecting frame 1112 facing the second space 102. The surface of the bottom guard plate 120 facing the second space 102 can be recessed, and / or the surface of the bottom plate 112 facing the second space 102 can be recessed to facilitate the formation of the second space 102. Hole 103 is set in the transverse connecting frame 1112. The specific position of hole 103 can avoid the bottom guard plate 120 and the box bottom plate 112, reducing the interference of the bottom guard plate 120 and the box bottom plate 112 with hole 103. This can further reduce the molding difficulty of the second space 102 and hole 103 and improve production efficiency.

[0056] In some embodiments, the housing body 110 further includes a housing cover 113, which is located on the side of the side frame 111 away from the housing bottom plate 112. The housing cover 113 covers the opening on the other side of the side frame 111 and is connected to the side frame 111 to form a first space 101. The housing cover 113 covering the opening on the other side of the side frame 111 and being connected to the side frame 111 to form the first space 101 facilitates the assembly of the battery cell 300 and the thermal management component 200 with the housing body 110 to form the battery device 2, further improving the production efficiency of the battery device 2. The housing cover 113 can be fixedly connected to the side frame 111 by welding, snap-fitting, or bolting, or the housing cover 113 can be integrally formed with the side frame 111. In some applications, a sealing element can be clamped onto the surface of the housing cover 113 and the side frame 111 facing away from the housing bottom plate 112 to improve the sealing of the first space 101.

[0057] See Figure 5 and Figure 6 , Figure 5 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application. Figure 6 yes Figure 5 The diagram shown is a structural schematic of the battery device without the individual battery cells and thermal management components.

[0058] The main body 110 of the housing includes a bottom wall 130, which includes a central region 131 and an edge region 132. A battery cell 300 is fixed in the central region 131, and a hole 103 is located in the edge region 132. The bottom wall 130 may include a surface for supporting the battery cell 300. The shape of the bottom wall 130 can be set according to actual conditions; for example, the bottom wall 130 can be circular, square, rectangular, or elliptical, etc. The bottom wall 130 can be divided into a central region 131 and an edge region 132. The central region 131 can be understood as a region with a certain distance from the outer periphery of the bottom wall 130, and the edge region 132 can be understood as a region closer to the outer periphery of the bottom wall 130 than the central region 131. Adhesive can be applied to the central region 131, and the battery cell 300 can be fixed to the central region 131 by adhesive. In some applications, the central region 131 can also have a vent hole corresponding to the pressure relief mechanism of the battery cell 300, so that the gas leaking from the pressure relief mechanism of the battery cell 300 can flow out of the first space 101 through the vent hole. The hole 103 is located in the edge region 132, which can reduce the risk of the battery cell 300 interfering with the hole 103, and also reduce the molding difficulty of the battery box. In some applications, the second space 102 can be set corresponding to the edge region 132, that is, the projection of the second space 102 on the bottom wall 130 is located within the edge region 132, which can reduce the impact of the second space 102 on the pressure relief of the battery device 2.

[0059] In some embodiments, an edge region 132 surrounds at least a portion of the outer periphery of a central region 131. The edge region 132 can be one or more; for example, the edge region 132 can be annular, and the annular edge region 132 can be disposed around the outer periphery of the central region 131. Figure 6 As shown, the edge region 132 also includes two linear regions, which can be located on opposite sides of the central region 131. Figure 5As shown, in this embodiment, the thermal management component 200 may include a manifold component 210 and at least one cooling plate 220. The manifold component 210 may include two manifolds, each corresponding to an edge region 132. At least one cooling plate 220 is connected between the two manifolds. One of the manifolds is provided with a liquid inlet, and the other is provided with a liquid outlet. The liquid inlet and outlet are respectively connected to the heat exchange system. The cooling plate 220 is also provided with a liquid inlet, a liquid outlet, and a liquid flow channel. The liquid outlet and the liquid inlet of the cooling plate 220 are both connected to the liquid flow channel. The liquid inlet of the cooling plate 220 is connected to one of the two manifolds, and the liquid outlet of the cooling plate 220 is connected to the other of the two manifolds. Liquid in one manifold can enter the liquid flow channel of the cooling plate 220 through the liquid inlet of the cooling plate 220, and liquid in the liquid flow channel of the cooling plate 220 can enter the other manifold through the liquid outlet of the cooling plate 220, thereby achieving the purpose of replacing the liquid in the cooling plate 220. The edge region 132 surrounds at least part of the outer periphery of the central region 131 to facilitate a more comprehensive arrangement of the holes 103, thereby improving the efficiency of liquid entering the second space 102 from the first space 101.

[0060] In some embodiments, the number of holes 103 is plurality of, and the plurality of holes 103 are spaced apart along the direction extending from the edge region 132. The number of holes 103 can be set according to actual conditions; for example, the number of holes 103 can be two, three, four, or other numbers. Figure 6 As shown, there are two edge regions 132, which are located on opposite sides of the central region 131. Each edge region 132 is provided with four holes 103. The four holes 103 are spaced apart along the length of the edge region 132, which can improve the efficiency of liquid entering the second space 102 from the first space 101 and further reduce the risk of short circuit inside the battery device 2 caused by liquid leaking from the thermal management component 200 being in the first space 101 for a long time.

[0061] In summary, both the thermal management component 200 and the battery cell 300 are located in the first space 101, which facilitates the thermal management component 200 to perform heat exchange on the battery cell 300. The main body 110 of the housing is provided with a hole 103, which connects the first space 101 and the second space 102. This can reduce the risk of short circuits caused by liquid leaking from the thermal management component 200 remaining in the first space 101 for a long time, thereby improving the reliability of the battery device 2.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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, characterized in that, The battery device includes: Battery cell; A thermal management component for thermal management of the battery cell; The enclosure assembly includes an enclosure body and a bottom protective plate. The enclosure body forms a first space, and the battery cell and the thermal management component are disposed in the first space. The bottom protective plate is connected to the side of the enclosure body opposite to the first space. The bottom protective plate is at least partially spaced from the enclosure body to form a second space. The enclosure body is provided with a hole that connects the first space and the second space.

2. The battery device according to claim 1, characterized in that, The battery device includes a filter component connected to the main body of the housing and covering the opening.

3. The battery device according to claim 2, characterized in that, The filter component is connected to the side of the main body of the housing facing the first space.

4. The battery device according to claim 2, characterized in that, The number of holes and the number of filter elements are both multiple, and each hole is covered by at least one filter element.

5. The battery device according to claim 1, characterized in that, The main body of the housing includes a bottom wall, which includes a central region and an edge region. The battery cell is fixed in the central region, and the hole is located in the edge region.

6. The battery device according to claim 5, characterized in that, The number of holes is multiple, and the multiple holes are spaced apart along the direction extending from the edge region.

7. The battery device according to claim 1, characterized in that, The thermal management component includes a busbar and at least one cooling plate, at least one of the cooling plates being connected to the busbar and the cooling plate being in contact with the large surface area of ​​the battery cell, the large surface area being larger than the other surface areas of the battery cell.

8. The battery device according to claim 7, characterized in that, The hole corresponds to the connection between the cooling plate and the manifold in the direction of gravity.

9. The battery device according to claim 1, characterized in that, The battery device includes a liquid-absorbing component disposed in the second space.

10. The battery device according to any one of claims 1 to 9, characterized in that, The main body of the box includes a side frame and a bottom plate. The side frame is ring-shaped, and the bottom plate covers one side opening of the side frame. Both the bottom plate and the bottom guard plate are connected to the side frame, and the hole is provided in the side frame.

11. The battery device according to claim 10, characterized in that, The side frame includes a main side frame and a transverse connecting frame. The transverse connecting frame is connected to the main side frame and extends into the first space. The bottom plate of the box is connected to the transverse connecting frame. The bottom guard plate is connected to the transverse connecting frame and / or the main side frame. The hole is provided in the transverse connecting frame.

12. An electrical appliance, characterized in that, The electrical device includes the battery device as described in any one of claims 1 to 11.

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