Battery device and electric device

Abstract

The utility model relates to the technical field of battery structures, and provides a battery device and a power utilization device.The battery device comprises a box body, the box body comprises a box body, an outer lining structure and a reinforcing structure, the reinforcing structure is arranged in a containing cavity of the box body and covers at least part of the inner surface of the box body, and a first hanging part is arranged on the outer lining structure; the outer lining structure is arranged outside the containing cavity, a part of the outer lining structure is arranged on the outer surface of the box body, the part of the outer lining structure, the box body and the reinforcing structure are stacked, and the outer lining structure, the box body and the reinforcing structure are fixed at the stacking position through welding and jointly form a welding part; according to the battery device provided by the embodiment of the invention, the outer lining structure, the box body and the reinforcing structure can be mutually connected into a whole, so that the connection strength between the outer lining structure and the box body and the overall strength of the box body can be effectively improved, and the probability that the battery device is damaged when being hung and used is low.

Description

Technical Field

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

[0002] Battery devices are widely used in new energy vehicles, electronic devices, and other fields. In related technologies, battery devices need to be mounted, for example, on the underside of the vehicle body. However, vehicles experience varying degrees of vibration during operation. If the overall structural strength of the battery device is insufficient, there is a risk of the battery device cracking or being damaged. Utility Model Content

[0003] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem that the battery device is prone to damage when it is mounted and used.

[0004] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery cell and a housing. The housing includes a housing body, an outer liner structure, and a reinforcing structure. The housing body has an internal cavity for accommodating the battery cell. The reinforcing structure is disposed within the cavity and covers at least a portion of the inner surface of the housing body. The outer liner structure has a first mounting portion for connecting the battery device to an external device. The outer liner structure is disposed outside the cavity, and a portion of the outer liner structure is disposed on the outer surface of the housing body. The portion of the outer liner structure overlaps with the housing body and the reinforcing structure. The outer liner structure, the housing body, and the reinforcing structure are fixed together by welding at the overlap point and together form a welded portion.

[0006] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application provides a reinforcing structure inside the receiving cavity and an outer liner structure outside the receiving cavity. In this way, the outer liner structure, the box body and the reinforcing structure can form a multi-layered stacked structure and be connected to each other at the stacking points to form an integral whole. This can effectively improve the connection strength between the outer liner structure and the box body and the overall strength of the box body. When the first mounting part provided on the outer liner structure is used for mounting, the probability of damage between the outer liner structure and the box body is lower, thereby effectively improving the reliability of the box body. The probability of damage to the battery device when it is used for mounting is also lower.

[0007] In some embodiments, the housing body includes a bottom plate and a side enclosure surrounding the outer periphery of the bottom plate, the bottom plate and the side enclosure together forming a receiving cavity, the bottom plate carrying a battery cell; a reinforcing structure is disposed on the inner surface of the bottom plate, a portion of the outer liner structure is disposed on the outer surface of the bottom plate, a portion of the outer liner structure is stacked with the bottom plate and the reinforcing structure, the outer liner structure, the bottom plate and the reinforcing structure are fixed by welding at the stacking point and together form a welded part; and / or, the reinforcing structure is disposed on the inner surface of the side enclosure, a portion of the outer liner structure is disposed on the outer surface of the side enclosure, a portion of the outer liner structure is stacked with the side enclosure and the reinforcing structure, the outer liner structure, the side enclosure and the reinforcing structure are fixed by welding at the stacking point and together form a welded part.

[0008] By adopting the above technical solution, the outer liner structure can be combined with the bottom plate and reinforcing structure of the box body to form a multi-layer structure and be connected, and / or the outer liner structure can be combined with the side wall and reinforcing structure of the box body to form a multi-layer structure and be connected. This can effectively improve the connection strength between the outer liner structure and the bottom plate and / or side wall of the box body, thereby improving the overall strength of the box body and improving the stability of the battery device when it is mounted and used.

[0009] In some embodiments, the outer liner structure includes a first outer liner plate and a second outer liner plate. A portion of the first outer liner plate is disposed on the outer surface of the base plate portion and overlaps with the base plate portion and the reinforcing structure. The first outer liner plate, the base plate portion, and the reinforcing structure are fixed by welding at the overlap and together form a welded portion. A portion of the second outer liner plate is disposed on the outer surface of the side enclosure portion and overlaps with the side enclosure portion and the reinforcing structure. The second outer liner plate, the side enclosure portion, and the reinforcing structure are fixed by welding at the overlap and together form a welded portion. Another portion of the first outer liner plate and another portion of the second outer liner plate are connected on the outside of the side enclosure portion and connected to the first mounting portion.

[0010] By adopting the above technical solution, the first outer liner can be connected to the bottom plate and the corresponding reinforcing structure to achieve a reinforcing effect, and the second outer liner can be connected to the side wall and the corresponding reinforcing structure to achieve a reinforcing effect. The first and second outer liners are respectively connected to different positions of the box body, thereby effectively improving the stability of the box body when it is mounted and used.

[0011] In some embodiments, a portion of the first outer liner is disposed on the outer surface of the side enclosure and overlaps with the side enclosure and the reinforcing structure. The first outer liner, the side enclosure, and the reinforcing structure are fixed by welding at the overlap and together form a welded portion.

[0012] By adopting the above technical solution, the first outer liner is connected to the bottom plate and the reinforcing structure on the outer surface of the bottom plate, and the first outer liner is also connected to the side wall and the reinforcing structure on the outer surface of the side wall. This can further improve the overall strength of the box, thereby further improving the stability of the battery device when it is mounted and used, and reducing the probability of damage to the battery device when it is mounted and used.

[0013] In some embodiments, a portion of the first outer liner and a portion of the second outer liner form a reinforcing cavity and are connected and fixed together; the first mounting part is a mounting sleeve, a portion of the mounting sleeve is disposed in the reinforcing cavity, and the other portion of the first mounting part passes through the second outer liner and is exposed in the reinforcing cavity.

[0014] By adopting the above technical solution, the connection strength between the first outer liner plate and the second outer liner plate is improved by forming a reinforcing cavity through the enclosing of a portion of the first outer liner plate and a portion of the mounting sleeve is set in the reinforcing cavity for assembly. This can improve the connection strength between the outer liner structure and the mounting sleeve, thereby improving the stability of the battery device when it is mounted and used.

[0015] In some embodiments, the reinforcing structure includes a heat exchange plate, a portion of which is disposed on the inner surface of the base plate; the portion of the heat exchange plate is stacked with the base plate and the first outer liner, and the heat exchange plate, the base plate and the first outer liner are fixed together by welding at the stacking point to form a welded portion.

[0016] By adopting the above technical solution, the heat exchange plate is partially set on the inner surface of the bottom plate, so that the heat exchange plate, the bottom plate and the first outer liner are stacked and fixed by welding at the stacking point to form a multi-layer structure, which can effectively improve the overall strength of the box.

[0017] In some embodiments, the reinforcing structure includes an inner liner, a portion of which is disposed on the inner surface of the side enclosure; a portion of the inner liner is overlapped with the side enclosure and a second outer liner, and the inner liner, the side enclosure and the second outer liner are fixed together by welding at the overlap and together form a welded portion.

[0018] By adopting the above technical solution, the inner lining plate is partially set on the inner surface of the side enclosure, so that the inner lining plate, the side enclosure and the second outer lining plate are stacked and fixed by welding at the stacking point to form a multi-layer structure, which can effectively improve the overall strength of the box.

[0019] In some embodiments, a portion of the inner liner is further disposed on the inner surface of the base plate portion, and the portion of the inner liner is stacked with the base plate portion and the first outer liner. The inner liner, the base plate portion and the first outer liner are fixed by welding at the stacking point and together form a welded portion.

[0020] By adopting the above technical solution, the inner lining plate is partially set on the inner surface of the bottom plate, so that the inner lining plate, the bottom plate and the first outer lining plate are stacked and fixed by welding at the stacking point to form a multi-layer structure. Thus, the inner lining plate can simultaneously strengthen the connection strength of the first outer lining plate and the second outer lining plate, thereby further improving the overall strength of the box.

[0021] In some embodiments, a portion of the first outer liner is disposed on the outer surface of the side enclosure, and a portion of the inner liner is stacked with the side enclosure and the first outer liner. The inner liner, the side enclosure, and the first outer liner are fixed together by welding at the stacking point and together form a welded portion.

[0022] By adopting the above technical solution, the first outer liner can be welded and fixed to the bottom plate and the inner liner on the outer surface of the bottom plate, and can also be welded and fixed to the side wall and the inner liner on the outer surface of the side wall. This can further improve the connection points between the first outer liner and the box body, thereby further improving the connection strength between the first outer liner and the box body.

[0023] In some embodiments, the reinforcing structure further includes a heat exchange plate disposed on the inner surface of the base plate portion. A portion of the heat exchange plate is stacked with the base plate portion and the first outer liner plate. The heat exchange plate, the base plate portion, and the first outer liner plate are fixed together by welding at the stacking point and together form a welded portion.

[0024] By adopting the above technical solution, the heat exchange plate can form a heat exchange with the battery cell. At the same time, the heat exchange plate can be stacked on the inner surface of the bottom plate and the bottom plate and the first outer liner plate, and the stacked parts can be fixed by welding to form a multi-layer structure. This can effectively improve the overall strength of the box and reduce the area of ​​the inner liner plate.

[0025] In some embodiments, the housing further includes a heat exchange plate disposed on the inner surface of the bottom plate portion, and a portion of the inner liner plate is stacked between the bottom plate portion and the heat exchange plate portion; the heat exchange plate, the inner liner plate and the bottom plate portion are fixed together by welding at the stacking point and together form a welded portion.

[0026] By adopting the above technical solution, the heat exchange plate can be placed on the inner surface of the base plate to form heat exchange with the battery cells. At the same time, the inner liner can be stacked between the base plate and the heat exchange plate, so that the heat exchange plate, the inner liner, and the base plate are fixed by welding at the stacking point and form a welded part. This allows the inner liner to connect to the first outer liner, the second outer liner, and the heat exchange plate at the same time and form a reinforcing effect. This can further improve the overall strength of the box and improve the stability of the battery device when it is mounted and used, and reduce the probability of damage to the battery device during the mounting and use process.

[0027] In some embodiments, the heat exchange plate includes a heat exchange body portion and a connecting portion connected to each other. The heat exchange body portion forms a heat exchange channel, which contains a heat exchange medium. The material of the connecting portion is different from that of the heat exchange body portion. The connecting portion, the inner liner plate, and the bottom plate portion are made of the same material. The heat exchange plate is welded and fixed to the inner liner plate and the bottom plate portion through the connecting portion.

[0028] By adopting the above technical solution, the heat exchange plate is welded and fixed to the inner lining plate and the bottom plate of the same material through the connecting part. In this way, the material of the heat exchange body can be different from the material of the inner lining plate and the bottom plate, which can further optimize the design of the heat exchange plate.

[0029] In some embodiments, the heat exchange body is provided with mounting holes, the connecting part is an insert structure, the insert structure is installed in the mounting holes, and the insert structure is welded and fixed to the inner liner and the bottom plate.

[0030] By adopting the above technical solution, the insert structure is installed in the mounting hole of the heat exchange body, and then the insert structure is welded and fixed to the inner liner and the bottom plate of the same material. In this way, the material of the heat exchange body is different from that of the inner liner and the bottom plate.

[0031] In some embodiments, at least a portion of the heat exchange plate is stacked with the inner liner, the bottom plate, and the first outer liner, and the heat exchange plate, the inner liner, the bottom plate, and the first outer liner are fixed together by welding at the stacking point to form a welded portion.

[0032] By adopting the above technical solution, the heat exchange plate, inner lining plate, bottom plate and first outer lining plate can be stacked and fixed by welding at the stacking point to form a welded part. This can form a multi-layer reinforced structure to further improve the overall strength of the box.

[0033] In some embodiments, a gap space is formed between the heat exchange plate and the base plate, and a filling layer is disposed in the gap space.

[0034] By adopting the above technical solution, the filling layer can fill the gap between the heat exchange plate and the bottom plate, which can reduce the occurrence of abnormal noise and also play a role in buffering and absorbing energy.

[0035] In some embodiments, the housing further includes a mounting member, wherein at least a portion of the first outer liner is provided with a mounting member on the side opposite to the second outer liner, the mounting member is connected to the first outer liner, and the mounting member is used to fix the pipeline structure.

[0036] By adopting the above technical solution, by setting a mounting component on the side of the first outer liner plate away from the second outer liner plate and connecting the mounting component to the first outer liner plate, the mounting component can be used to support the wiring harness structure, pipeline structure, etc. of the battery device to improve the neatness; at the same time, when the battery device is mounted and used, the mounting component can also be used to fill and shield the external components.

[0037] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0038] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device. When the structure strength of the battery device is superior, the reliability of the electrical device using the battery device is better. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies 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.

[0040] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0041] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0042] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the overall structure of the box provided in the embodiments of this application;

[0044] Figure 5 for Figure 4 A magnified view of part A;

[0045] Figure 6 A top view of the housing provided in an embodiment of this application;

[0046] Figure 7 for Figure 6 A partial sectional view at BB;

[0047] Figure 8 for Figure 6 Another partial sectional view at BB.

[0048] The following are the labeling elements in the figure:

[0049] 1000, vehicles;

[0050] 100. Battery device;

[0051] 10. Housing; 10a. Receiving cavity; 11. First housing; 12. Second housing; 101. Housing body; 1011. Bottom plate; 1012. Side panel; 102. Outer lining structure; 1021. First outer lining plate; 1022. Second outer lining plate; 1023. Reinforcing cavity; 103. Reinforcing structure; 1031. Inner lining plate; 1032. Heat exchange plate; 1032a. Heat exchange body; 104. Mounting component;

[0052] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0053] 30. First mounting part; 40. Connecting part; 50. Filling layer. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0055] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in industrial equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0059] In related technologies, battery devices require mounting. Taking the application of battery devices in vehicles as an example, the battery device can be mounted on the bottom of the vehicle body using a mounting structure. However, vehicles experience varying degrees of vibration due to different road conditions during operation. During this vibration, the battery device tends to move relative to the vehicle body, resulting in significant forces acting on the battery device at the mounting point. Under these forces, the battery device's casing is prone to damage, deformation, or breakage, thus affecting the normal operation of the battery device.

[0060] Based on the above considerations, in order to solve the problem of battery devices being easily damaged during use, a battery device is designed. By setting a reinforcing structure inside the housing cavity of the battery device and covering at least part of the inner surface of the housing body, and simultaneously setting part of the outer liner structure located outside the housing cavity on the outer surface of the housing body and overlapping the housing body and the reinforcing structure, and welding and fixing it at the overlap, the reinforcing structure, housing body and outer liner structure can be stacked to form a multi-layer structure to achieve a reinforcing effect. When connected to an external device through the first mounting part set on the outer liner structure, the probability of damage between the outer liner structure and the housing body is lower, thus the reliability of the housing is higher and the probability of damage to the battery device during use is lower.

[0061] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0062] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0063] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0064] 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.

[0065] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0066] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0067] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0068] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10.

[0069] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0070] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0071] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0072] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to accommodate the battery cell assembly.

[0073] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0075] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0076] The battery cell 20 can be a 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., and the embodiments of this application are not limited to this.

[0077] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery device. For example... Figure 3The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0078] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment; the shape of end cap 21 can be adapted to the shape of housing 22 to fit housing 22. Optionally, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed when subjected to compression and impact, so that battery cell 20 can have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used to electrically connect with electrode assembly 23 for outputting or inputting electrical energy of battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0079] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0080] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The housing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, active ions (e.g., lithium ions) reversibly insert and extract between the positive and negative electrode sheets to achieve charging and discharging, and the tabs connect to the electrode terminals to form a current loop.

[0081] According to some embodiments of this application, refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 This application provides a battery device 100, including a battery cell 20 and a housing 10. The housing 10 includes a housing body 101, an outer liner structure 102, and a reinforcing structure 103. The housing body 101 has an internal cavity 10a for accommodating the battery cell 20. The reinforcing structure 103 is disposed within the cavity 10a and covers at least a portion of the inner surface of the housing body 101. The outer liner structure 102 has a first mounting portion 30 for connecting the battery device 100 to an external device. The outer liner structure 102 is disposed outside the cavity 10a, and a portion of the outer liner structure 102 is disposed on the outer surface of the housing body 101. The portion of the outer liner structure 102 overlaps with the housing body 101 and the reinforcing structure 103. The outer liner structure 102, the housing body 101, and the reinforcing structure 103 are fixed by welding at the overlapping point and together form a welded part.

[0082] Among them, the box body 101 of the box body 10 refers to the main part of the box body 10; the inside of the box body 101 forms a receiving cavity 10a, and the battery cell 20 can be accommodated in the receiving cavity 10a to realize the accommodating assembly.

[0083] Optionally, the box body 101 may be, but is not limited to, a circular, triangular, or rectangular structure box body, or a polygonal structure box body. The material of the box body 101 may be, but is not limited to, steel, aluminum alloy, steel-aluminum composite, or copper-aluminum composite.

[0084] The outer liner structure 102 refers to a structural component disposed outside the receiving cavity 10a and connected to the box body 101. It is understood that the outer liner structure 102 is provided with a first mounting part 30, which is used for mounting, for example, mounting and assembling it to a vehicle body using the first mounting part 30; thereby, the outer liner structure 102 can connect and support the box body 101 to achieve the purpose of overall mounting and connection assembly of the battery device 100.

[0085] The first mounting part 30 refers to a structural component used to connect and fix to an external structure to achieve mounting assembly. Optionally, the first mounting part 30 may be, but is not limited to, a block structure, a bracket structure, a beam structure, etc.; for example, in some embodiments, the first mounting part 30 may be a cylindrical structure with threaded holes, such as a sleeve structure; in this way, bolts or other locking accessories are passed through the threaded holes and locked to the corresponding external device (such as the body of a vehicle) to achieve mounting assembly.

[0086] Optionally, the outer lining structure 102 may include, but is not limited to, various structures used for support and connection, such as plate structures, block structures, and bracket structures.

[0087] The number of outer lining structures 102 can be one. For example, a completely uninterrupted outer lining structure 102 can be arranged around the outer periphery of the box body 101 and connected to the box body 101, and mounted and assembled through the first mounting part 30 provided on the outer lining structure 102. Alternatively, the number of outer lining structures 102 can be multiple, such as two, three or more. Multiple outer lining structures 102 can be arranged sequentially around the outer periphery of the box body 101 and connected to the box body 101, and mounted and connected simultaneously through the first mounting part 30 provided on each of the multiple outer lining structures 102 to achieve assembly.

[0088] Optionally, the outer lining structure 102 can be connected to any or more parts of the box body 101; for example, the outer lining structure 102 can be connected to the bottom of the box body 101 to achieve the effect of supporting and supporting the box body 101, or the outer lining structure 102 can be connected to the side of the box body 101 to achieve the effect of strengthening the connection of the box body 101, or the outer lining structure 102 can be connected to both the bottom and the side of the box body 101 to further enhance the connection strength between the two.

[0089] The reinforcing structure 103 refers to a structure that strengthens the overall strength of the box body 101 and the connection strength between the box body 101 and the outer lining structure 102. Optionally, the reinforcing structure 103 can be a single or multiple plate structure, such as a lining structure, a cold-rolled plate structure, etc.

[0090] The reinforcing structure 103 is applied to at least a portion of the inner surface of the box body 101; alternatively, the reinforcing structure 103 may apply to the entire inner surface of the box body 101; or, the reinforcing structure 103 may apply to a portion of the inner surface of the box body 101, for example, by applying it together with the outer lining structure 102 at the same location on the box body 101, so that the outer lining structure 102 and the reinforcing structure 103 are overlapped at the same location on the box body 101.

[0091] The inner surface of the box body 101 mentioned above refers to the side wall of the box body 101 facing the inside of the receiving cavity 10a. Correspondingly, the other side wall of the box body 101 facing the outside of the receiving cavity 10a is the outer surface of the box body 101.

[0092] In this embodiment, the reinforcing structure 103 can be covered on at least a portion of the inner surface of the box body 101, while a portion of the outer lining structure 102 is disposed on the outer surface of the box body 101. Thus, the reinforcing structure 103, the box body 101, and the portion of the outer lining structure 102 can be stacked and combined to form a multi-layered structure. Furthermore, the outer lining structure 102, the box body 101, and the reinforcing structure 103 are fixed by welding at the stacking point and together form a welded part. That is, the outer lining structure 102, the box body 101, and the reinforcing structure 103 are welded at the stacking point through a welding process to form a weld connecting the three, so that the outer lining structure 102, the box body 101, and the reinforcing structure 103 are fixed by welding, thereby improving the connection strength of the outer lining structure 102 and the overall strength of the box body 10.

[0093] It should be noted that the welded part refers to the description of the structure formed after the partial melting, mixing and solidification of multiple components. The welded part can be dot-shaped, strip-shaped or other shapes.

[0094] Optionally, the connection method of the reinforcing structure 103, the box body 101, and the outer lining structure 102 can be as follows: the reinforcing structure 103, the box body 101, and the outer lining structure 102 are welded together at the overlapping point to form a welded part, so that the three are fixed together by welding; or, based on the welding fixation of the reinforcing structure 103, the box body 101, and the outer lining structure 102, the reinforcing structure 103, the box body 101, and the outer lining structure 102 can be fixed by fastening fasteners (such as bolts, screws, etc.) and welding at the same time; or, the reinforcing structure 103 and the box body 101 can be welded together, the outer lining structure 102 and the box body 101 can be welded together, and the three are further welded together to form a welded part, so that the three are fixed together by welding.

[0095] The battery device 100 provided in this application embodiment provides a reinforcing structure 103 inside the receiving cavity 10a and an outer liner structure 102 outside the receiving cavity 10a. In this way, the outer liner structure 102, the box body 101 and the reinforcing structure 103 can form a multi-layered stacked structure and be connected to each other at the stacking points to form an integral unit. This can effectively improve the connection strength between the outer liner structure 102 and the box body 101 as well as the overall strength of the box body 10. When the first mounting part 30 provided on the outer liner structure 102 is used for mounting, the probability of damage between the outer liner structure 102 and the box body 101 is lower, thereby effectively improving the reliability of the box body 10. The probability of damage to the battery device 100 during mounting is also lower.

[0096] Please refer to Figure 4 , Figures 6 to 8 In some embodiments, the housing body 101 includes a bottom plate 1011 and a side circumference 1012 surrounding the bottom plate 1011. The bottom plate 1011 and the side circumference 1012 together form a receiving cavity 10a. The bottom plate 1011 carries the battery cell 20. A reinforcing structure 103 is disposed on the inner surface of the bottom plate 1011, and a portion of the outer lining structure 102 is disposed on the outer surface of the bottom plate 1011. A portion of the outer lining structure 102 overlaps with the bottom plate 1011 and the reinforcing structure 103. The outer lining structure 102, the base plate portion 1011, and the reinforcing structure 103 are fixed together by welding at the overlapping point and together form a welded portion; and / or, the reinforcing structure 103 is disposed on the inner surface of the side enclosure portion 1012, a portion of the outer lining structure 102 is disposed on the outer surface of the side enclosure portion 1012, a portion of the outer lining structure 102 is overlapped with the side enclosure portion 1012 and the reinforcing structure 103, and the outer lining structure 102, the side enclosure portion 1012, and the reinforcing structure 103 are fixed together by welding at the overlapping point and together form a welded portion.

[0097] The housing body 101 includes a bottom plate 1011 and a side plate 1012. The side plate 1012 is arranged around the outer periphery of the bottom plate 1011 and is combined to form a basin-shaped structure. Thus, the internal area enclosed by the bottom plate 1011 and the side plate 1012 is the receiving cavity 10a for accommodating the battery cell 20.

[0098] The reinforcing structure 103 is located within the receiving cavity 10a; optionally, the reinforcing structure 103 may be disposed on the inner surface of the base plate portion 1011, and the reinforcing structure 103 may cover at least a portion of the inner surface of the base plate portion 1011; or, the reinforcing structure 103 may be disposed on the inner surface of the side enclosure portion 1012, and the reinforcing structure 103 may cover at least a portion of the inner surface of the side enclosure portion 1012; or, the reinforcing structure 103 may be disposed on both the inner surface of the base plate portion 1011 and the inner surface of the side enclosure portion 1012, and simultaneously cover at least a portion of the inner surface of the base plate portion 1011 and at least a portion of the inner surface of the side enclosure portion 1012.

[0099] Optionally, a portion of the outer lining structure 102 may be disposed on the outer surface of the bottom plate portion 1011 and overlapped with the bottom plate portion 1011 and the reinforcing structure 103, and connected at the overlap; or, a portion of the outer lining structure 102 may be disposed on the outer surface of the side enclosure portion 1012 and overlapped with the bottom plate portion 1011 and the reinforcing structure 103, and connected at the overlap; or, a portion of the outer lining structure 102 may be disposed on the outer surface of the bottom plate portion 1011, while another portion of the outer lining structure 102 may be disposed on the outer surface of the side enclosure portion 1012. In this way, the outer lining structure 102 can overlap with the box body 101 at both the side enclosure portion 1012 and the bottom plate portion 1011, and connect with the reinforcing structure 103 at the overlap, thereby effectively improving the connection strength between the outer lining structure 102 and the box body 101.

[0100] For example, in some embodiments, the reinforcing structure 103 may be disposed on the inner surface of the side enclosure 1012, and a portion of the outer lining structure 102 may be disposed on the outer surface of the side enclosure 1012, so that the outer lining structure 102, the side enclosure 1012 and the reinforcing structure 103 can form a multi-layered stacked structure, and the outer lining structure 102, the side enclosure 1012 and the reinforcing structure 103 are fixed by welding at the stacking point and together form a welded part, so as to strengthen the connection strength between the outer lining structure 102 and the box body 101 and optimize the overall strength of the box body 10.

[0101] Alternatively, in other embodiments, the reinforcing structure 103 may be disposed on the inner surface of the base plate portion 1011, and a portion of the outer lining structure 102 may be disposed on the outer surface of the base plate portion 1011, so that the outer lining structure 102, the base plate portion 1011 and the reinforcing structure 103 can form a multi-layered stacked structure, and the outer lining structure 102, the base plate portion 101 and the reinforcing structure 103 are fixed by welding at the stacking point and together form a welded part, so as to strengthen the connection strength between the outer lining structure 102 and the box body 101 and optimize the overall strength of the box body 10.

[0102] Alternatively, in other embodiments, the reinforcing structure 103 may be simultaneously applied to at least a portion of the inner surface of the base plate portion 1011 and at least a portion of the inner surface of the side enclosure portion 1012. A portion of the outer lining structure 102 is disposed on the outer surface of the base plate portion 1011, and another portion of the outer lining structure 102 is disposed on the outer surface of the side enclosure portion 1012. This allows a portion of the outer lining structure 102 to be welded to the base plate portion 1011 and the reinforcing structure 103 at the overlapping point to form a welded portion. The other portion of the outer lining structure 102 to be welded to the side enclosure portion 1012 and the reinforcing structure 103 at the overlapping point to form a welded portion. This further optimizes the connection strength between the outer lining structure 102 and the box body 101, as well as the overall strength of the box body 10.

[0103] With this configuration, a portion of the outer liner structure 102 can be combined with the bottom plate portion 1011 and the reinforcing structure 103 of the box body 101 to form a multi-layer structure and be connected. And / or, a portion of the outer liner structure 102 can be combined with the side wall portion 1012 and the reinforcing structure 103 of the box body 101 to form a multi-layer structure and be connected. This can effectively improve the connection strength between the outer liner structure 102 and the bottom plate portion 1011 and / or the side wall portion 1012 of the box body 101, thereby improving the overall strength of the box body 10 and enhancing the stability of the battery device 100 when it is mounted and used.

[0104] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the outer lining structure 102 includes a first outer lining plate 1021 and a second outer lining plate 1022. A portion of the first outer lining plate 1021 is disposed on the outer surface of the bottom plate portion 1011 and overlaps with the bottom plate portion 1011 and the reinforcing structure 103. The first outer lining plate 1021, the bottom plate portion 1011 and the reinforcing structure 103 are fixed by welding at the overlap and together form a welded portion. A portion of the second outer lining plate 1022 is disposed on the outer surface of the side wall portion 1012 and overlaps with the side wall portion 1012 and the reinforcing structure 103. The second outer lining plate 1022, the side wall portion 1012 and the reinforcing structure 103 are fixed by welding at the overlap and together form a welded portion. Another portion of the first outer lining plate 1021 and another portion of the second outer lining plate 1022 are connected to the outside of the side wall portion 1012 and connected to the first mounting portion 30.

[0105] The outer lining structure 102 includes a first outer lining plate 1021 and a second outer lining plate 1022. The first outer lining plate 1021 may be, but is not limited to, a plate structure made of various materials such as steel plate, aluminum plate, composite plate (steel-aluminum alloy, copper-aluminum alloy, etc.). Similarly, the second outer lining plate 1022 may be, but is not limited to, a plate structure made of various materials such as steel plate, aluminum plate, composite plate (steel-aluminum alloy, copper-aluminum alloy, etc.).

[0106] In some embodiments, the first outer liner 1021 and the second outer liner 1022 can be made of the same material, which facilitates the welding operation between the first outer liner 1021 and the second outer liner 1022. In other embodiments, the first outer liner 1021 and the second outer liner 1022 can also be made of the same material as the box body 101, which facilitates the welding operation between the first outer liner 1021 and the second outer liner 1022 and the corresponding parts of the box body 101.

[0107] A portion of the first outer liner 1021 is disposed on the outer surface of the base plate 1011. The first outer liner 1021 overlaps with the base plate 1011 and the reinforcing structure 103 and is fixed by welding at the overlap. In this way, the first outer liner 1021 can provide a supporting effect for the box body 101, thereby improving the stability of the box body 10 during loading and use.

[0108] Optionally, the first outer liner 1021, the base plate 1011, and the reinforcing structure 103 can be welded together to form an integral unit, so that the first outer liner 1021, the base plate 1011, and the reinforcing structure 103 can form a welded part at least at one location; or, in the case of fixing the three parts by welding, locking accessories (such as bolts, screws, rivets, etc.) can be used to connect the first outer liner 1021, the base plate 1011, and the reinforcing structure 103 to form an integral unit. In some embodiments, an adhesive layer (such as structural adhesive) can be provided between the first outer liner 1021 and the base plate 1011, and the adhesive layer can be used to surround the welded or locked parts, which can further improve the connection strength between the first outer liner 1021 and the base plate 1011, and at the same time protect the welded or locked parts between the first outer liner 1021 and the base plate 1011, reducing the probability of corrosion at that location.

[0109] Optionally, in some embodiments, the first outer liner 1021 may also be connected to the base plate 1011. For example, the first outer liner 1021 may be connected and fixed to the base plate 1011 by means of bonding, welding or other methods.

[0110] In other embodiments, the reinforcing structure 103 may also be connected to the base plate portion 1011. For example, the reinforcing structure 103 may be connected and fixed to the base plate portion 1011 by means of bonding, welding or other methods.

[0111] The second outer liner 1022 is partially disposed on the outer surface of the side enclosure 1012. The second outer liner 1022 overlaps with the side enclosure 1012 and the reinforcing structure 103 and is fixed by welding at the overlap point to form a welded part. In this way, the second outer liner 1022 can provide a connecting and supporting effect to the box body 101. The first outer liner 1021 and the second outer liner 1022 are respectively connected to different parts of the box body 101, thereby further improving the connection strength between the outer liner structure 102 and the box body 101, and improving the overall structural strength of the box body 10.

[0112] Optionally, the second outer liner 1022, the side wall portion 1012, and the reinforcing structure 103 can be welded together to form an integral unit, so that the first outer liner 1021, the side wall portion 1012, and the reinforcing structure 103 can form a welded part at least at one location; or, based on the above-mentioned welding to fix the three together, locking accessories (such as bolts, screws, rivets, etc.) can be used to connect the second outer liner 1022, the side wall portion 1012, and the reinforcing structure 103 into an integral unit. In some embodiments, an adhesive layer (such as structural adhesive) can be provided between the second outer liner 1022 and the side wall portion 1012, and the adhesive layer can be used to surround the welded or locked area, which can further improve the connection strength between the second outer liner 1022 and the side wall portion 1012, and at the same time protect the welded or locked area between the second outer liner 1022 and the side wall portion 1012, reducing the probability of corrosion at that location.

[0113] Optionally, in some embodiments, the second outer liner 1022 may also be connected to the side panel 1012. For example, the second outer liner 1022 may be connected and fixed to the side panel 1012 by means of bonding, welding or other methods.

[0114] In other embodiments, the reinforcing structure 103 may also be connected to the side enclosure 1012. For example, the reinforcing structure 103 may be connected and fixed to the side enclosure 1012 by means of bonding, welding or other methods.

[0115] The other part of the first outer liner 1021 that is not connected to the bottom plate 1011 and the side wall 1012, and the other part of the second outer liner 1022 that is not connected to the bottom plate 1011 and the side wall 1012, can be connected and fixed to the side of the side wall 1012 located outside the receiving cavity 10a.

[0116] The first outer liner 1021 and the second outer liner 1022 can be fixedly connected by, but not limited to, welding, locking, or bonding. For example, in some embodiments, the first outer liner 1021 and the second outer liner 1022 can be fixedly connected by interface adhesive dispensing and spot welding.

[0117] Meanwhile, the first outer liner 1021 and the second outer liner 1022 are located on the outside of the side enclosure 1012 and connected to the first mounting part 30. Thus, the first mounting part 30 can be distributed on the side of the side enclosure 1012 outside the receiving cavity 10a and used to connect with external devices, thereby improving the stability of the battery device 100 when mounted.

[0118] With this configuration, the first outer liner 1021 can be connected to the bottom plate 1011 and the corresponding reinforcing structure 103 to achieve a reinforcing effect. At the same time, the second outer liner 1022 can be connected to the side wall 1012 and the corresponding reinforcing structure 103 to achieve a reinforcing effect. The first outer liner 1021 and the second outer liner 1022 are respectively connected to different positions of the box body 101, and the first mounting part 30 is distributed on the outside of the side wall 1012. Therefore, when the battery device 100 is connected to an external device using the first mounting part 30, the stability of the battery device 100 during use can be effectively improved.

[0119] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, a portion of the first outer liner 1021 is disposed on the outer surface of the side enclosure 1012 and overlaps with the side enclosure 1012 and the reinforcing structure 103. The first outer liner 1021, the side enclosure 1012 and the reinforcing structure 103 are fixed by welding at the overlap and together form a welded part.

[0120] In this embodiment, based on the first outer liner 1021 being disposed on the bottom plate portion 1011 and stacked with the bottom plate portion 1011 and the reinforcing structure 103 and fixed by welding to form a welded portion, the first outer liner 1021 is also disposed on the outer surface of the side enclosure portion 1012, and the first outer liner 1021 is stacked with the side enclosure portion 1012 and the reinforcing structure 103 and fixed by welding at the stacking point to jointly form a welded portion.

[0121] Optionally, the first outer liner 1021, the side wall portion 1012, and the reinforcing structure 103 can be welded together to form an integral unit, so that the first outer liner 1021, the side wall portion 1012, and the reinforcing structure 103 can form a welded part at least at one location; or, based on the above-mentioned welding to fix the three parts, locking accessories (such as bolts, screws, rivets, etc.) can be used to connect the first outer liner 1021, the side wall portion 1012, and the reinforcing structure 103 to form an integral unit. In some embodiments, an adhesive layer (such as structural adhesive) can be provided between the first outer liner 1021 and the side wall portion 1012, and the adhesive layer can be used to surround the welded or locked parts, which can further improve the connection strength between the first outer liner 1021 and the side wall portion 1012, and at the same time protect the welded or locked parts between the first outer liner 1021 and the side wall portion 1012, reducing the probability of corrosion at that location.

[0122] Optionally, in some embodiments, the first outer liner 1021 may also be connected to the side panel 1012. For example, the first outer liner 1021 may be connected and fixed to the side panel 1012 by means of bonding, welding or other methods.

[0123] In other embodiments, the reinforcing structure 103 may also be connected to the side enclosure 1012. For example, the reinforcing structure 103 may be connected and fixed to the side enclosure 1012 by means of bonding, welding or other methods.

[0124] With this configuration, the first outer liner 1021 is welded to the bottom plate 1011 and the reinforcing structure 103 on the outer surface of the bottom plate 1011 to form a welded part. Furthermore, the first outer liner 1021 is also welded to the side wall and the reinforcing structure 103 on the outer surface of the side wall 1012 to form a welded part. In this way, the first outer liner 1021 provides better support for the bottom of the box body 101 and can further improve the overall strength of the box body 10, thereby further improving the stability of the battery device 100 when it is mounted and used, and thus reducing the probability of damage to the battery device 100 when it is mounted and used.

[0125] Please refer to Figure 4 and Figure 5 In some embodiments, a portion of the first outer liner 1021 and a portion of the second outer liner 1022 enclose and form a reinforcing cavity 1023 and are connected and fixed together; the first mounting part 30 is a mounting sleeve, a portion of which is disposed in the reinforcing cavity 1023, and the other portion of the first mounting part 30 passes through the second outer liner 1022 and is exposed in the reinforcing cavity 1023.

[0126] In this embodiment, a portion of the first outer liner 1021 and a portion of the second outer liner 1022 can be enclosed to form a reinforcing cavity 1023, which can improve the connection strength between the first outer liner 1021 and the second outer liner 1022.

[0127] For example, in some embodiments, a portion of the first outer liner 1021 may be recessed away from the second outer liner 1022, while the corresponding portion of the second outer liner 1022 is recessed away from the first outer liner 1021; after the first outer liner 1021 and the second outer liner 1022 are joined together and fixed by welding to form an integral unit, the recesses of the first outer liner 1021 and the second outer liner 1022 can be combined to form a reinforcing cavity 1023.

[0128] The first mounting part 30 is a mounting sleeve. The mounting sleeve can be partially disposed in the reinforcing cavity 1023, and the other part passes through the second outer liner 1022 and is exposed in the reinforcing cavity 1023. Thus, the mounting sleeve can be connected to the first outer liner 1021 and the second outer liner 1022 in the reinforcing cavity 1023 by welding or other means. The mounting sleeve is exposed after passing through the second outer liner 1022, so as to facilitate the connection with the external device through the mounting hole at the end of the mounting sleeve, thereby realizing the mounting connection of the battery device 100.

[0129] The reinforcing cavity 1023 formed between the first outer liner 1021 and the second outer liner 1022, and the part of the mounting sleeve disposed in the reinforcing cavity 1023 and simultaneously connected to the first outer liner 1021 and the second outer liner 1022, can effectively improve the connection strength between the first mounting part 30 and the first outer liner 1021 and the second outer liner 1022.

[0130] With this configuration, the reinforcement cavity 1023 is formed by the enclosing part of the first outer liner 1021 and the second outer liner 1022 to improve the connection strength between the first outer liner 1021 and the second outer liner 1022. The part of the mounting sleeve is placed in the reinforcement cavity 1023 for assembly. This can improve the connection strength between the outer liner structure 102 and the mounting sleeve, thereby improving the stability of the battery device 100 when it is mounted and used.

[0131] Please refer to Figures 4 to 8 In some embodiments, the reinforcing structure 103 includes an inner liner 1031, a portion of which is disposed on the inner surface of the side enclosure 1012; a portion of the inner liner 1031 is overlapped with the side enclosure 1012 and the second outer liner 1022, and the inner liner 1031, the side enclosure 1012 and the second outer liner 1022 are fixed together by welding at the overlap point and together form a welded part.

[0132] Understandably, the inner lining plate 1031 refers to the plate structure that is disposed inside the box body 101 and is used to structurally reinforce the box body 101.

[0133] Optionally, the inner lining plate 1031 can be, but is not limited to, various alloy plates such as steel plates and aluminum plates. The number of inner lining plates 1031 can be one, used to cover a designated area inside the box body 101 to form a multi-layered structure for structural reinforcement; or, the number of inner lining plates 1031 can be multiple, with multiple inner lining plates 1031 respectively installed on corresponding parts inside the box body 101 to achieve structural reinforcement in specific areas.

[0134] Optionally, in some embodiments, weight-reducing holes may be provided on the inner lining plate 1031 to reduce the impact of the inner lining plate 1031 on the overall weight of the box 10.

[0135] In this embodiment, a portion of the inner lining plate 1031 can be disposed on the inner surface of the side enclosure 1012, and a portion of the inner lining plate 1031 can be stacked with the side enclosure 1012 and the second outer lining plate 1022; at the same time, the inner lining plate 1031, the side enclosure 1012 and the second outer lining plate 1022 are fixed by welding at the stacking point and together form a welded part, so that the inner lining plate 1031, the side enclosure 1012 and the second outer lining plate 1022 can be connected to form a three-layer plate stacked structure, which can effectively improve the structural strength at this point and improve the connection strength between the second outer lining plate 1022 and the box body 101.

[0136] The inner lining plate 1031, the side wall portion 1012, and the second outer lining plate 1022 can be connected and fixed at the overlapping point by welding. For example, one or more welded portions can be formed by spot welding to simultaneously connect the inner lining plate 1031, the side wall portion 1012, and the second outer lining plate 1022. Optionally, in addition to welding, an adhesive layer can be provided between the inner lining plate 1031 and the side wall portion 1012, or between the side wall portion 1012 and the second outer lining plate 1022, to further enhance the connection strength between the inner lining plate 1031, the side wall portion 1012, and the second outer lining plate 1022.

[0137] With this configuration, a portion of the inner lining plate 1031 is placed on the inner surface of the side enclosure 1012, so that the inner lining plate 1031, the side enclosure 1012, and the second outer lining plate 1022 are stacked and fixed by welding at the stacking point to form a multi-layer structure, which can effectively improve the overall strength of the box 10.

[0138] Please refer to Figures 4 to 7In some embodiments, a portion of the inner lining plate 1031 is also disposed on the inner surface of the bottom plate portion 1011. The portion of the inner lining plate 1031 is stacked with the bottom plate portion 1011 and the first outer lining plate 1021. The inner lining plate 1031, the bottom plate portion 1011 and the first outer lining plate 1021 are fixed by welding at the stacking point and together form a welded part.

[0139] In this embodiment, in addition to a portion of the inner lining plate 1031 being disposed on the inner surface of the side wall portion 1012, another portion of the inner lining plate 1031 is also disposed on the inner surface of the bottom plate portion 1011; that is, the inner lining plate 1031 can simultaneously cover at least a portion of the bottom plate portion 1011 and at least a portion of the side wall portion 1012.

[0140] For example, in some embodiments, the inner lining 1031 may include a first plate portion and a second plate portion connected to each other and arranged at an angle, and the inner lining 1031 is disposed inside the box body 101 such that the first plate portion abuts against the inner surface of the side panel portion 1012 and the second plate portion abuts against the inner surface of the bottom plate portion 1011.

[0141] The portion of the inner lining plate 1031 disposed on the bottom plate portion 1011 can be stacked with the bottom plate portion 1011 and the first outer lining plate 1021. At the same time, the inner lining plate 1031, the bottom plate portion 1011 and the first outer lining plate 1021 are fixed by welding at the stacking point and together form a welded part, so that the inner lining plate 1031, the bottom plate portion 1011 and the first outer lining plate 1021 can be connected to form a three-layer plate stacked structure. This can effectively improve the structural strength at this point and improve the connection strength between the first outer lining plate 1021 and the box body 101.

[0142] The inner lining plate 1031, the bottom plate portion 1011, and the first outer lining plate 1021 can be connected and fixed at the overlapping point by welding. For example, one or more common welded portions that simultaneously connect the inner lining plate 1031, the bottom plate portion 1011, and the first outer lining plate 1021 can be formed by spot welding. Optionally, in addition to welding, an adhesive layer can be provided between the inner lining plate 1031 and the bottom plate portion 1011, or between the bottom plate portion 1011 and the first outer lining plate 1021, to further enhance the connection strength between the inner lining plate 1031, the bottom plate portion 1011, and the first outer lining plate 1021.

[0143] With this configuration, a portion of the inner lining plate 1031 is placed on the inner surface of the bottom plate 1011, so that the inner lining plate 1031, the bottom plate 1011, and the first outer lining plate 1021 are stacked and welded together to form a multi-layer structure. Thus, the inner lining plate 1031 can simultaneously strengthen the connection between the first outer lining plate 1021 and the second outer lining plate 1022, thereby further improving the overall strength of the housing 10.

[0144] Please refer to Figures 4 to 7 In some embodiments, a portion of the first outer liner 1021 is disposed on the outer surface of the side enclosure 1012, and a portion of the inner liner 1031 is stacked with the side enclosure 1012 and the first outer liner 1021. The inner liner 1031, the side enclosure 1012 and the first outer liner 1021 are fixed by welding at the stacking point and together form a welded part.

[0145] Understandably, while a portion of the first outer liner 1021 is disposed on the outer surface of the bottom plate portion 1011, another portion of the first outer liner 1021 can also be disposed on the outer surface of the side portion 1012. In this way, the first outer liner 1021 can simultaneously form connection points with both the bottom plate portion 1011 and the side portion 1012 of the box body 101. The first outer liner 1021 can cover the corner between the bottom plate portion 1011 and the corresponding side portion 1012, which can effectively improve the bottom support effect of the first outer liner 1021 on the box body 101 and further enhance the connection strength between the first outer liner 1021 and the box body 101.

[0146] The inner lining plate 1031, the side wall portion 1012, and the first outer lining plate 1021 can be connected and fixed at the overlapping point by welding. For example, one or more common welded portions that simultaneously connect the inner lining plate 1031, the side wall portion 1012, and the first outer lining plate 1021 can be formed by spot welding. Optionally, in addition to welding, an adhesive layer can be provided between the inner lining plate 1031 and the side wall portion 1012, or between the side wall portion 1012 and the first outer lining plate 1021, to further enhance the connection strength between the inner lining plate 1031, the side wall portion 1012, and the first outer lining plate 1021.

[0147] Thus, the connection between the outer lining structure 102 and the box body 101 includes: a fixed connection between the first outer lining plate 1021 and the bottom plate portion 1011 and the inner lining plate 1031; a fixed connection between the first outer lining plate 1021 and the side circumference portion 1012 and the inner lining plate 1031; and a fixed connection between the second outer lining plate 1022 and the side circumference portion 1012 and the inner lining plate 1031. As a result, there are more connection points between the outer lining structure 102 and the box body 101 and the inner lining plate 1031, the connection strength between the outer lining structure 102 and the box body 101 and the inner lining plate 1031 is better, and the overall strength of the box body 10 is also better.

[0148] Please refer to Figures 4 to 6 as well as Figure 8 In some embodiments, the reinforcing structure 103 further includes a heat exchange plate 1032, which is disposed on the inner surface of the base plate portion 1011. A portion of the heat exchange plate 1032 is stacked with the base plate portion 1011 and the first outer liner plate 1021. The heat exchange plate 1032, the base plate portion 1011 and the first outer liner plate 1021 are fixed by welding at the stacking point and together form a welded part.

[0149] The heat exchange plate 1032 refers to a component used to form heat exchange with the battery cell 20 to realize thermal management operation of the battery cell 20. The heat exchange plate 1032 is disposed on the inner surface of the base plate 1011, and the battery cell 20 can be disposed on the heat exchange plate 1032, for example, by being bonded to the heat exchange plate 1032 with thermally conductive adhesive, so as to improve the heat exchange efficiency between the heat exchange plate 1032 and the battery cell 20.

[0150] For example, in some embodiments, a heat exchange channel may be provided inside the heat exchange plate 1032, and heat exchange media such as water and heat transfer oil may be circulated into the heat exchange channel to achieve heat exchange.

[0151] In this embodiment, the heat exchange plate 1032 can be disposed inside the base plate portion 1011, and a portion of the heat exchange plate 1032 can be stacked with the base plate portion 1011 and the first outer liner plate 1021 disposed on the outer surface of the base plate portion 1011; in this way, the heat exchange plate 1032 can be used to form a multi-layer structure with the base plate portion 1011 and the first outer liner plate 1021 to achieve optimization of structural strength.

[0152] The heat exchange plate 1032, the base plate 1011, and the first outer liner 1021 are connected and fixed at their stacked locations. Optionally, the heat exchange plate 1032, the base plate 1011, and the first outer liner 1021 can be connected by welding, for example, by spot welding to form one or more welded portions that simultaneously connect the heat exchange plate 1032, the base plate 1011, and the first outer liner 1021. Optionally, in addition to welding, an adhesive layer can be provided between the heat exchange plate 1032 and the base plate 1011, or between the base plate 1011 and the first outer liner 1021, to further enhance the connection strength between the heat exchange plate 1032, the base plate 1011, and the first outer liner 1021.

[0153] With this configuration, the heat exchange plate 1032 can exchange heat with the battery cell 20. At the same time, the heat exchange plate 1032 can be stacked on the inner surface of the bottom plate 1011 and the bottom plate 1011 and the first outer liner 1021, and welded and fixed at the stacking point to form a multi-layer structure. This can effectively improve the overall strength of the housing 10 and reduce the area of ​​the inner liner 1031.

[0154] Please refer to Figures 4 to 7 In some embodiments, the housing 10 further includes a heat exchange plate 1032, which is disposed on the inner surface of the bottom plate portion 1011, and a portion of the inner lining plate 1031 is stacked between the bottom plate portion 1011 and the heat exchange plate 1032; the heat exchange plate 1032, the inner lining plate 1031 and the bottom plate portion 1011 are fixed by welding at the stacking point and together form a welded part.

[0155] In this embodiment, a heat exchange plate 1032 can be provided on the inner surface of the base plate 1011, and a portion of the inner liner 1031 can be extended onto the base plate 1011, so that a portion of the inner liner 1031 is stacked between the base plate 1011 and the heat exchange plate 1032.

[0156] Thus, the inner lining plate 1031 can be simultaneously disposed on the inner surface of the bottom plate 1011 and the inner surface of the side plate 1012, and the inner lining plate 1031 can be connected with the side plate 1012 and the second outer lining plate 1022 to form a multi-layer structure. The inner lining plate 1031 can be connected with the side plate 1012 and the first outer lining plate 1021 to form a multi-layer structure, and the inner lining plate 1031 can be connected with the bottom plate 1011 and the first outer lining plate 1021 to form a multi-layer structure. At the same time, the heat exchange plate 1032 can be connected with the inner lining plate 1031 and the bottom plate 1011 to form a multi-layer structure. By using the inner lining plate 1031 to reinforce the overall structure of the housing 10, and by using the inner lining plate 1031 to form a multi-layer structure with the corresponding structure at different positions to achieve the strengthening effect, the overall strength of the housing 10 can be effectively improved.

[0157] The heat exchange plate 1032, the inner liner plate 1031, and the base plate 1011 can be connected by welding. For example, one or more welded portions can be formed by spot welding to simultaneously connect the heat exchange plate 1032, the inner liner plate 1031, and the base plate 1011. Optionally, in addition to welding, an adhesive layer can be provided between the heat exchange plate 1032 and the inner liner plate 1031, or between the inner liner plate 1031 and the base plate 1011, to further enhance the connection strength between the heat exchange plate 1032, the inner liner plate 1031, and the base plate 1011.

[0158] With this configuration, the heat exchange plate 1032 can be placed on the inner surface of the base plate 1011 to form heat exchange with the battery cell 20. At the same time, the inner liner plate 1031 can be stacked between the base plate 1011 and the heat exchange plate 1032, so that the heat exchange plate 1032, the inner liner plate 1031 and the base plate 1011 are welded and fixed at the stacking point. This allows the inner liner plate 1031 to connect and reinforce the first outer liner plate 1021, the second outer liner plate 1022 and the heat exchange plate 1032. This can further improve the overall strength of the housing 10 and enhance the stability of the battery device 100 during use, reducing the probability of damage to the battery device 100 during use.

[0159] Please refer to Figures 6 to 8 In some embodiments, the reinforcing structure 103 includes a heat exchange plate 1032, a portion of which is disposed on the inner surface of the base plate portion 1011; a portion of the heat exchange plate 1032 is stacked with the base plate portion 1011 and the first outer liner plate 1021, and the heat exchange plate 1032, the base plate portion 1011 and the first outer liner plate 1021 are fixed by welding at the stacking point and together form a welded part.

[0160] In this embodiment, the reinforcing structure 103 may include a heat exchange plate 1032; thus, a portion of the heat exchange plate 1032 may be stacked with the bottom plate 1011 and the first outer liner 1021; at the same time, the heat exchange plate 1032, the bottom plate 1011 and the first outer liner 1021 are welded and fixed at the stacking point, so that the heat exchange plate 1032, the bottom plate 1011 and the first outer liner 1021 can be connected to form a three-layer plate stacking structure, which can effectively improve the structural strength at this point and improve the connection strength between the first outer liner 1021 and the box body 101.

[0161] The heat exchange plate 1032, the base plate 1011, and the first outer liner 1021 can be connected and fixed at the stacking point by welding. For example, one or more welded portions can be formed by spot welding to simultaneously connect the heat exchange plate 1032, the base plate 1011, and the first outer liner 1021. Optionally, in addition to welding, an adhesive layer can be provided between the heat exchange plate 1032 and the base plate 1011, or between the base plate 1011 and the first outer liner 1021, to further improve the connection strength between the heat exchange plate 1032, the base plate 1011, and the first outer liner 1021.

[0162] With this configuration, a portion of the heat exchange plate 1032 is placed on the inner surface of the base plate 1011, so that the heat exchange plate 1032, the base plate 1011 and the first outer liner 1021 are stacked and welded together to form a multi-layer structure, which can effectively improve the overall strength of the housing 10.

[0163] Please refer to Figures 4 to 7 In some embodiments, the heat exchange plate 1032 includes a heat exchange body portion 1032a and a connecting portion 40 connected to each other. The heat exchange body portion 1032a forms a heat exchange channel, which contains a heat exchange medium. The material of the connecting portion 40 is different from that of the heat exchange body portion 1032a. The connecting portion 40, the inner liner plate 1031, and the bottom plate portion 1011 are made of the same material. The heat exchange plate 1032 is welded and fixed to the inner liner plate 1031 and the bottom plate portion 1011 through the connecting portion 40.

[0164] In this embodiment, the heat exchange plate 1032 may include a heat exchange body part 1032a and a connecting part 40 made of different materials. Meanwhile, the material of the connecting part 40 is the same as the material of the inner liner plate 1031 and the bottom plate part 1011.

[0165] Understandably, the heat exchange body 1032a refers to the portion of the structure used to form a heat exchange with the battery cell 20. In some embodiments, the heat exchange body 1032a is provided with a heat exchange channel, and the heat exchange medium contained inside the heat exchange channel is used to achieve heat exchange with the battery cell 20.

[0166] The heat exchange medium mentioned above can be, but is not limited to, liquids with high specific heat capacity such as water and oil, or it can also be a phase change material medium.

[0167] The connecting part 40 refers to the connection structure used to weld with the inner liner plate 1031 and the bottom plate 1011. Optionally, the connecting part 40 can be provided on the heat exchange plate 1032 by means of, but not limited to, embedding, riveting, hot pressing and bonding.

[0168] Optionally, the heat exchange body 1032a may be made of, but is not limited to, metals or alloys such as steel, copper, and aluminum, and the connecting part 40 may be made of, but is not limited to, one of a group of metals or alloys such as steel and aluminum alloy. Similarly, the inner liner 1031 and the base plate 1011 may also be made of one of a group of metals or alloys such as steel and aluminum alloy.

[0169] It should be understood that by setting the materials of the connecting part 40, the inner liner plate 1031, and the base plate 1011 to be the same, the connecting part 40, the inner liner plate 1031, and the base plate 1011 have the same properties, such as approximately the same melting point. Therefore, the welding operation of the connecting part 40, the inner liner plate 1031, and the base plate 1011 is more convenient, and the problem of difficulty in successfully welding the connecting part 40, the inner liner plate 1031, and the base plate 1011 due to large differences in melting point can be effectively reduced.

[0170] For example, in some embodiments, the heat exchanger body 1032a can be made of aluminum, the connecting part 40 can be made of steel, and the inner liner 1031 and the bottom plate 1011 are also made of steel. The connecting part 40 can be fixed to the heat exchanger body 1032a by embedding. Thus, the heat exchanger plate 1032 is fixed by welding the connecting part 40 to the inner liner 1031 and the bottom plate 1011. Furthermore, the aluminum heat exchanger body 1032a is lighter, thus ensuring the overall heat exchange performance of the heat exchanger plate 1032 while reducing its weight, thereby effectively reducing the total weight of the battery device 100.

[0171] With this configuration, the heat exchange plate 1032 is welded and fixed to the inner liner plate 1031 and the bottom plate 1011, which are made of the same material, through the connecting part 40. In this way, the material of the heat exchange body part 1032a can be different from the material of the inner liner plate 1031 and the bottom plate 1011, which can further optimize the design of the heat exchange plate 1032 to meet the corresponding requirements.

[0172] Please refer to Figures 6 to 8 In some embodiments, the heat exchange body 1032a is provided with mounting holes, the connecting part 40 is an insert structure, the insert structure is installed in the mounting holes, and the insert structure is welded and fixed to the inner liner 1031 and the bottom plate 1011.

[0173] In this embodiment, mounting holes can be provided on the heat exchange body 1032a, so that the insert structure can be fitted into the mounting holes to achieve a fixed connection between the insert structure and the heat exchange body 1032a.

[0174] With this configuration, by inserting the insert structure into the mounting hole of the heat exchange body 1032a, and then welding the insert structure to the inner liner 1031 and the bottom plate 1011, which are made of the same material, it is possible to achieve the purpose of having a different material for the heat exchange body 1032a from that for the inner liner 1031 and the bottom plate 1011.

[0175] Please refer to Figures 4 to 7 In some embodiments, at least a portion of the heat exchange plate 1032 is stacked with the inner liner plate 1031, the bottom plate portion 1011 and the first outer liner plate 1021, and the heat exchange plate 1032, the inner liner plate 1031, the bottom plate portion 1011 and the first outer liner plate 1021 are fixed by welding at the stacking point and together form a welded part.

[0176] In this embodiment, at least a portion of the heat exchange plate 1032 can be stacked and connected with the inner liner plate 1031, the bottom plate portion 1011, and the first outer liner plate 1021. Optionally, the heat exchange plate 1032, the inner liner plate 1031, the bottom plate portion 1011, and the first outer liner plate 1021 at the stacking point can be connected by welding, so that any two or three of the heat exchange plate 1032, the inner liner plate 1031, the bottom plate portion 1011, and the first outer liner plate 1021 arranged adjacently can be welded together. Optionally, in addition to the welding operation, an adhesive layer can be provided between any two adjacent pairs of the heat exchange plate 1032, inner liner plate 1031, bottom plate 1011 and first outer liner plate 1021 to further improve the connection strength between the heat exchange plate 1032, inner liner plate 1031, bottom plate 1011 and first outer liner plate 1021.

[0177] With this arrangement, the heat exchange plate 1032, inner liner plate 1031, bottom plate 1011 and first outer liner plate 1021 can be stacked and fixed by welding at the stacking point to form a welded part. This can form a multi-layer reinforced structure 103 to further improve the overall strength of the housing 10.

[0178] Please refer to Figures 6 to 8 In some embodiments, a gap space is formed between the heat exchange plate 1032 and the base plate 1011, and a filling layer 50 is provided in the gap space.

[0179] Optionally, the base plate portion 1011 may be recessed away from the heat exchange plate 1032, thereby forming a gap space between the base plate portion 1011 and the heat exchange plate 1032.

[0180] Here, the filling layer 50 refers to the structure used to fill the gap space. Optionally, the filling layer 50 may be, but is not limited to, a foam layer, a cushioning layer, a resin filling layer, etc.

[0181] With this configuration, the filling layer 50 can fill the gap between the heat exchange plate 1032 and the bottom plate 1011, which can reduce abnormal noise and also play a role in buffering and absorbing energy.

[0182] Please refer to Figures 6 to 8 In some embodiments, the housing 10 further includes a mounting member 104, at least a portion of the first outer liner 1021 is provided with the mounting member 104 on the side opposite to the second outer liner 1022, the mounting member 104 is connected to the first outer liner 1021, and the mounting member 104 is used to fix the pipeline structure.

[0183] Among them, mounting component 104 refers to a structural component used for bundling and binding wire harnesses, pipeline structures, etc.

[0184] Optionally, the mounting component 104 can be, but is not limited to, a plate structure, a support structure, a beam structure, or other configurations; the number of mounting components 104 can be one or more; the mounting component 104 can be located on the side of the first outer liner 1021 opposite to the second outer liner 1022 at any location.

[0185] The material of the mounting component 104 may be, but is not limited to, any metal or alloy such as steel alloy, aluminum alloy, or copper alloy; the mounting component 104 may be fixedly connected to the first outer liner plate 1021 by means of bonding, attachment, welding, etc.

[0186] Optionally, the mounting member 104 can be connected to any part of the first outer liner 1021; for example, the mounting member 104 can be connected to the portion of the first outer liner 1021 that abuts against the outer surface of the bottom plate portion 1011, or the mounting member 104 can be connected to the portion of the first outer liner 1021 that abuts against the outer surface of the side circumference portion 1012, or the mounting member 104 can be connected to the portion where the first outer liner 1021 and the second outer liner 1022 are connected.

[0187] For example, in some embodiments, a plurality of battery cells 20 may be arranged sequentially in the receiving cavity 10a. In a direction perpendicular to the arrangement direction of the plurality of battery cells 20, the aforementioned mounting member 104 may be provided on the first outer liner plate 1021 of the outer liner structure 102 connected to the outer surface of the box body 101. The mounting member 104 may be fixed by welding to the portion of the first outer liner plate 1021 that is provided on the outer surface of the bottom plate portion 1011.

[0188] With this configuration, by setting a mounting member 104 on the side of the first outer liner 1021 opposite to the second outer liner 1022 and connecting the mounting member 104 to the first outer liner 1021, the mounting member 104 can provide wiring support for the relevant wiring harness structure and pipeline structure of the battery device 100, thereby improving the neatness; at the same time, when the battery device 100 is mounted and used, the mounting member 104 can also serve as an external filling and shielding function.

[0189] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0190] Please refer to Figure 2 , Figures 4 to 8 In this embodiment, the battery device 100 includes a housing 10 and a battery cell 20; wherein, the housing 10 includes a housing body 101, a reinforcing structure 103 and an outer liner structure 102.

[0191] The box body 101 includes a bottom plate 1011 and a side wall 1012 surrounding the outer periphery of the bottom plate 1011. The bottom plate 1011 and the side wall 1012 together form a receiving cavity 10a for accommodating the battery cell 20.

[0192] The reinforcing structure 103 includes an inner liner 1031 and a heat exchange plate 1032. The inner liner 1031 is disposed within the receiving cavity 10a and is disposed on both the inner surface of the bottom plate portion 1011 and the inner surface of the side portion 1012. The heat exchange plate 1032 is disposed on the inner surface of the bottom plate portion 1011, and a portion of the inner liner 1031 is stacked between the heat exchange plate 1032 and the bottom plate portion 1011. A gap space is formed between the central region of the heat exchange plate 1032 and the bottom plate portion 1011, and a filling layer 50 is disposed in the gap space to fill it, thus achieving a buffering effect and reducing abnormal noise.

[0193] The outer lining structure 102 includes a first outer lining plate 1021 and a second outer lining plate 1022. A portion of the first outer lining plate 1021 and a portion of the second outer lining plate 1022 enclose the outer side of the side enclosure 1012 to form a reinforcing cavity 1023 and are welded and fixed. A first mounting portion 30 is also welded to the first outer lining plate 1021 and the second outer lining plate 1022 at the fixing point. Another portion of the first outer lining plate 1021 abuts against the outer surface of the bottom plate 1011, and the first outer lining plate 1021 can also abut against the outer surface of the side enclosure 1012, so that the first outer lining plate 1021 covers the corresponding connecting portions 40 of the bottom plate 1011 and the side enclosure 1012. Another portion of the second outer lining plate 1022 abuts against the outer surface of the side enclosure 1012.

[0194] The first outer liner 1021 can be welded to the bottom plate 1011 and the inner liner 1031 at the overlapping point to form a welded part to fix and form a three-layer plate structure. The first outer liner 1021 can be welded to the side wall 1012 and the inner liner 1031 at the overlapping point to form a welded part to fix and form a three-layer plate structure. The second outer liner 1022 can be welded to the side wall 1012 and the inner liner 1031 at the overlapping point to form a welded part to fix and form a three-layer plate structure. At the same time, the heat exchange plate 1032 can be welded to the inner liner 1031 and the bottom plate 1011 at the overlapping point to form a welded part to fix and form a three-layer plate structure.

[0195] Meanwhile, a mounting component 104 is provided on the side of the first outer liner 1021 opposite to the second outer liner 1022. The mounting component 104 can be welded to the part of the first outer liner 1021 that abuts against the bottom plate 1011, and the mounting component 104 is used to bind and restrain wire harnesses, pipeline structures, etc.

[0196] Please refer to Figure 1 , Figure 2 and Figure 4 This application embodiment also provides an electrical device, including the battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0197] In this embodiment, the vehicle 1000 is used as an example for the description of the electrical device. The vehicle 1000 includes a body structure, and the battery device 100 can be mounted and connected to the body structure through the first mounting part 30 provided on the outer liner structure 102 of the housing 10, so as to realize the mounting and assembly of the battery device 100.

[0198] The electrical device provided in this application includes the battery device 100 described above. When the battery device 100 has superior structural strength, the electrical device using the battery device 100 has better reliability.

[0199] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by, include: Battery cell; as well as The enclosure includes a main body, an outer liner structure, and a reinforcing structure. The main body has an internal cavity for accommodating the battery cells. The reinforcing structure is disposed within the cavity and covers at least a portion of the inner surface of the main body. The outer liner structure has a first mounting portion for connecting the battery assembly to an external device. The outer liner structure is disposed outside the cavity, with a portion of it disposed on the outer surface of the main body. The portion of the outer liner structure overlaps with the main body and the reinforcing structure. The outer liner structure, the main body, and the reinforcing structure are fixed together by welding at the overlap point, forming a welded section.

2. The battery device of claim 1, wherein: The box body includes a bottom plate and a side enclosure surrounding the outer periphery of the bottom plate. The bottom plate and the side enclosure together form the receiving cavity, and the bottom plate carries the battery cell. The reinforcing structure is disposed on the inner surface of the base plate, and a portion of the outer lining structure is disposed on the outer surface of the base plate. The portion of the outer lining structure overlaps with the base plate and the reinforcing structure. The outer lining structure, the base plate, and the reinforcing structure are fixed by welding at the overlap and together form a welded part. And / or, the reinforcing structure is disposed on the inner surface of the side enclosure, a portion of the outer lining structure is disposed on the outer surface of the side enclosure, a portion of the outer lining structure overlaps with the side enclosure and the reinforcing structure, and the outer lining structure, the side enclosure and the reinforcing structure are fixed by welding at the overlap and together form a welded part.

3. The battery device of claim 2, wherein: The outer lining structure includes a first outer lining plate and a second outer lining plate. A portion of the first outer lining plate is disposed on the outer surface of the bottom plate and overlaps with the bottom plate and the reinforcing structure. The first outer lining plate, the bottom plate, and the reinforcing structure are fixed by welding at the overlap point and together form a welded part. A portion of the second outer lining plate is disposed on the outer surface of the side wall and overlaps with the side wall and the reinforcing structure. The second outer lining plate, the side wall, and the reinforcing structure are fixed by welding at the overlap point and together form a welded part. Another portion of the first outer lining plate and another portion of the second outer lining plate are connected to the outside of the side wall and connected to the first mounting part.

4. The battery device of claim 3, wherein: A portion of the first outer liner is disposed on the outer surface of the side enclosure and overlaps with the side enclosure and the reinforcing structure. The first outer liner, the side enclosure, and the reinforcing structure are fixed by welding at the overlap and together form a welded part.

5. The battery device of claim 4, wherein: A portion of the first outer liner plate and a portion of the second outer liner plate enclose a reinforcing cavity and are connected and fixed together; the first mounting part is a mounting sleeve, a portion of the mounting sleeve is disposed in the reinforcing cavity, and the other portion of the mounting sleeve passes through the second outer liner plate and is exposed in the reinforcing cavity.

6. The battery device according to any one of claims 3 to 5, characterized by: The reinforcing structure includes a heat exchange plate, a portion of which is disposed on the inner surface of the base plate; the portion of which is stacked with the base plate and the first outer liner, and the heat exchange plate, the base plate and the first outer liner are fixed together by welding at the stacking point to form a welded part.

7. The battery device according to any one of claims 3 to 5, characterized by: The reinforcing structure includes an inner lining plate, a portion of which is disposed on the inner surface of the side enclosure; a portion of which overlaps with the side enclosure and the second outer lining plate, and the inner lining plate, the side enclosure and the second outer lining plate are fixed together by welding at the overlap point to form a welded part.

8. The battery device of claim 7, wherein: A portion of the inner lining plate is also disposed on the inner surface of the base plate portion. The portion of the inner lining plate overlaps with the base plate portion and the first outer lining plate. The inner lining plate, the base plate portion, and the first outer lining plate are fixed by welding at the overlapping point and together form a welded part.

9. The battery device of claim 8, wherein: A portion of the first outer liner is disposed on the outer surface of the side enclosure, and a portion of the inner liner is overlapped with the side enclosure and the first outer liner. The inner liner, the side enclosure, and the first outer liner are fixed together by welding at the overlap point and together form a welded part.

10. The battery device of claim 9, wherein: The reinforcing structure also includes a heat exchange plate disposed on the inner surface of the base plate. A portion of the heat exchange plate is stacked with the base plate and the first outer liner. The heat exchange plate, the base plate, and the first outer liner are fixed together by welding at the stacking point to form a welded part.

11. The battery device of claim 9, wherein: The housing also includes a heat exchange plate disposed on the inner surface of the bottom plate, and a portion of the inner lining plate is stacked between the bottom plate and the heat exchange plate; the heat exchange plate, the inner lining plate, and the bottom plate are fixed together by welding at the stacking point to form a welded part.

12. The battery device of claim 11, wherein: The heat exchange plate includes a heat exchange body and a connecting part connected to each other. The heat exchange body has a heat exchange channel, which contains a heat exchange medium. The material of the connecting part is different from that of the heat exchange body. The connecting part, the inner liner, and the bottom plate are made of the same material. The heat exchange plate is welded and fixed to the inner liner and the bottom plate through the connecting part.

13. The battery device of claim 12, wherein: The heat exchanger body is provided with mounting holes, and the connecting part is an insert structure. The insert structure is installed in the mounting holes and is welded and fixed to the inner liner and the bottom plate.

14. The battery device of claim 11, wherein: At least a portion of the heat exchange plate is stacked with the inner liner plate, the bottom plate portion, and the first outer liner plate. The heat exchange plate, the inner liner plate, the bottom plate portion, and the first outer liner plate are fixed together by welding at the stacking point to form a welded part.

15. The battery device of any one of claims 10-14, wherein: A gap space is formed between the heat exchange plate and the base plate, and a filling layer is provided in the gap space.

16. The battery device according to any one of claims 3 to 5, characterized by: The enclosure also includes a mounting component, at least a portion of the first outer liner plate is provided with the mounting component on the side opposite to the second outer liner plate, the mounting component is connected to the first outer liner plate, and the mounting component is used to fix the pipeline structure.

17. An electrical device, comprising: Includes the battery device as described in any one of claims 1 to 16, the battery device being used to provide electrical energy.

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