Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery box, a heat exchange assembly, at least one battery monomer, a reinforcing lining plate and a mounting piece, the battery box comprises a bottom wall and a side wall surrounding the periphery of the bottom wall, and the bottom wall and the side wall jointly form a containing cavity. The battery monomers are arranged in the accommodating cavities; the heat exchange assembly is arranged in the containing cavity. The battery monomers, the heat exchange assembly and the bottom wall are sequentially arranged in the first direction. The reinforcing lining plate is arranged in the containing cavity, and at least part of the reinforcing lining plate is located on the side, in the first direction, of the heat exchange assembly. The mounting piece is arranged outside the containing cavity, and the battery device is connected with an external device through the mounting piece. And at least part of the mounting piece is positioned on one side, back to the battery monomers, of the bottom wall along the first direction. On the same projection plane perpendicular to the first direction, orthographic projections of the reinforcing lining plate, the heat exchange assembly, the bottom wall and the mounting piece are overlapped. The light weight of the battery device can be realized while the structural strength is improved.

Description

Technical Field

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

[0002] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are being used more and more in the field of energy storage.

[0003] In battery-powered devices, the battery can provide all or part of the power. Therefore, how to improve structural strength while achieving lightweight battery devices has become an important research direction in this field. Utility Model Content

[0004] In view of this, this application aims to provide a battery device and an electrical device that can improve structural strength while achieving a lightweight battery device.

[0005] To achieve the above objectives, embodiments of this application provide a battery device, the battery device comprising:

[0006] A battery box, the battery box including a bottom wall and side walls surrounding the periphery of the bottom wall, the bottom wall and the side walls together forming a receiving cavity;

[0007] At least one battery cell, wherein the at least one battery cell is disposed within the receiving cavity;

[0008] A heat exchange assembly is disposed within the receiving cavity and is used to contain a heat exchange medium. The heat exchange assembly is thermally connected to the battery cell. Along a first direction, the battery cell, the heat exchange assembly, and the bottom wall are arranged sequentially.

[0009] A reinforcing liner is disposed within the receiving cavity, and at least a portion of the reinforcing liner is located on one side of the heat exchange assembly along the first direction;

[0010] A mounting component is disposed outside the receiving cavity, and the battery device is connected to an external device through the mounting component; at least a portion of the mounting component is located on the side of the bottom wall facing away from the battery cell along the first direction; on the same projection plane perpendicular to the first direction, the orthographic projections of the reinforcing liner, the heat exchange assembly, the bottom wall, and the mounting component overlap.

[0011] The battery device provided in this application includes a battery box and at least one battery cell. The battery box has a receiving cavity, and the battery cell is disposed within the receiving cavity, with the battery box providing protection for the battery cell. By placing the heat exchange assembly within the receiving cavity, the heat exchange efficiency of the heat exchange assembly can be improved, thereby enhancing the performance and reliability of the battery device. By providing a reinforcing liner inside the battery box, the reinforcing liner, together with the heat exchange assembly, can support the battery cell, reducing the risk of deformation of the battery box due to the weight of the battery cell. Furthermore, the reinforcing liner is disposed on one side of the battery heat exchange assembly along a first direction, which helps to improve the battery device's resistance to bottom balling and reduces the risk of battery device failure. By providing a mounting member outside the battery box, and disposing at least a portion of the mounting member on the bottom wall along the first direction away from the battery cell, the supporting effect, protective effect, and connection strength of the battery box are improved. In other words, the synergistic effect of the heat exchange assembly, the reinforcing liner, the mounting member, and the battery box helps to improve the structural strength of the battery device. Furthermore, by improving the structural strength of the battery pack, the bottom protective plate can be eliminated, achieving both weight reduction and a decrease in the height dimension, thus enhancing structural compactness. By increasing structural strength and reducing weight, the battery pack's operating frequency can be increased, which to some extent prevents resonance between the battery pack and the power source during operation, thereby improving its reliability.

[0012] In one embodiment, the reinforcing liner includes a main body and a protrusion protruding toward the heat exchange assembly. The main body abuts against or is connected to the bottom wall, and the protrusion abuts against or is connected to the heat exchange assembly.

[0013] By incorporating a main body and protrusions, the reinforcing liner not only enhances its structural strength but also allows it to abut against or connect with the bottom wall and heat exchange components, further improving the structural strength of the battery device. Additionally, a space can be defined between the heat exchange components and the bottom wall for filling with foam components, etc.

[0014] In one embodiment, the reinforcing liner includes a first liner and a second liner connected to each other, the first liner being disposed on one side of the heat exchange assembly along the first direction, and the second liner being disposed on the side of the sidewall facing the battery cell.

[0015] By placing the first liner on one side along the first direction, the battery box and heat exchange components can be protected against impacts and compression, and the heat exchange components can be supported.

[0016] In one embodiment, the heat exchange assembly, the reinforcing liner, and the overlapping portion of the bottom wall along the first direction are connected.

[0017] Here, by connecting the heat exchange components, the reinforcing liner, and the bottom wall, the structural stability of the heat exchange components, the reinforcing liner, and the battery box is improved. Through the synergistic effect between the heat exchange components, the reinforcing liner, and the battery box, the structural strength of the battery device is further improved.

[0018] In one embodiment, the battery device includes at least one connector that passes through the heat exchange assembly, the reinforcing liner, and the bottom wall. The connector is made of a different material than the heat exchange assembly and is welded to the reinforcing liner and the bottom wall.

[0019] By inserting at least one connector through the heat exchange assembly, the reinforcing liner, and the bottom wall, the connection strength between the heat exchange assembly, the reinforcing liner, and the battery box can be improved. Furthermore, by welding the connector to the heat exchange assembly, the reinforcing liner, and the bottom wall, the connection strength between the heat exchange assembly, the reinforcing liner, and the battery box can be further improved.

[0020] In one embodiment, the mounting member is provided with a clearance hole, and the connector is disposed opposite to the clearance hole along the first direction.

[0021] The mounting component is equipped with clearance holes, which allow the connector to be welded to the heat exchange assembly, reinforcing liner, and bottom wall from the outside. During the welding process, welding slag will not fall into the battery box. In other words, the clearance holes can facilitate welding and cleaning of welding slag while reducing the weight of the mounting component.

[0022] In one embodiment, a portion of the reinforcing liner is located on the side of the heat exchange assembly facing away from the battery cell along the first direction.

[0023] In this way, the surface of the heat exchange components facing the battery cells can be made as flat as possible, which facilitates the stable placement of the battery cells and helps to improve heat exchange efficiency.

[0024] In one embodiment, the mounting bracket, the reinforcing liner, and the overlapping portion of the bottom wall along the first direction are connected.

[0025] Here, by connecting the heat exchange components, reinforcing liner, and bottom wall, and connecting the mounting components, reinforcing liner, and bottom wall, it is beneficial to increase the constraint between the heat exchange components, reinforcing liner, mounting components, and bottom wall, thereby improving the rigidity of the battery device.

[0026] In one embodiment, there are two reinforcing liner plates and two mounting brackets. The two reinforcing liner plates are respectively disposed on both sides of the battery box along the second direction, and the two mounting brackets are respectively disposed on both sides of the battery box along the second direction, wherein the first direction is perpendicular to the second direction.

[0027] By placing two reinforcing liner plates on both sides of the battery box along the second direction, and placing two mounting components on both sides of the battery box along the second direction, the reinforcing liner plates and mounting components can work together to strengthen the battery box, improving its ability to resist side impacts, compression and other working conditions, as well as its supporting and protective functions for the battery device.

[0028] In one embodiment, the reinforcing liner is provided with weight-reducing holes.

[0029] It is possible to reduce the weight of the reinforcing liner while maintaining structural strength.

[0030] In one embodiment, the mounting component includes a first mounting plate, the first mounting plate including a first sub-part and a second sub-part connected to each other, the first sub-part being disposed on the side of the bottom wall facing away from the battery cell along the first direction, the second sub-part being disposed on the side of the side wall facing away from the battery cell along the second direction, the second sub-part, the reinforcing liner and the side wall overlapping and connected along the second direction; the first direction is perpendicular to the second direction;

[0031] The first sub-part, the reinforcing liner, and the overlapping portion of the bottom wall along the first direction are connected.

[0032] By connecting the first sub-part, the reinforcing liner, and the bottom wall, and connecting the second sub-part, the reinforcing liner, and the side wall, the connection strength of the mount can be improved, thereby preventing the weld from cracking under test conditions such as vibration test and impact test of the battery device.

[0033] In one embodiment, the mounting member includes a second mounting plate, the second sub-part folds away from the sidewall to form a first flange, the second mounting plate folds away from the sidewall to form a second flange, the first mounting plate and the second mounting plate are arranged along a third direction, the first flange and the second flange overlap along the third direction and are connected to each other and used for connection with an external device, a portion of the reinforcing liner overlaps with the sidewall along the second direction and is connected to the sidewall and the second mounting plate; the first direction, the second direction and the third direction are perpendicular to each other.

[0034] In other words, the first mounting plate and the second mounting plate together constitute at least part of the mounting components of the battery device, which are used to connect with external devices. The first mounting plate and the second mounting plate are the main structures that support the battery device. The first mounting plate and the second mounting plate are arranged along a third direction. Both the first mounting plate and the second mounting plate have the ability to resist side collisions, preventing the battery device body from being deformed or damaged due to collisions, and reducing the probability of battery device failure.

[0035] In one embodiment, the battery device further includes a coating applied to the outer surface of the mount and / or the battery case.

[0036] This will help to further improve the structural strength of the mounting components, thereby enhancing the protection of the battery box.

[0037] In one embodiment, the battery device further includes a foaming element that is at least filled between the heat exchange assembly and the bottom wall.

[0038] By filling at least the space between the heat exchange components and the bottom wall of the battery box with foam, the impact resistance of the battery device can be further improved.

[0039] In one embodiment, the sidewall and the bottom wall are configured to be integrally stamped from a metallic material.

[0040] A second aspect of this application provides an electrical device, including the battery device described above.

[0041] The electrical device provided in this application includes a battery device. By providing a reinforcing liner inside the battery box, the liner, together with the heat exchange assembly, supports the individual battery cells, reducing the risk of deformation of the battery box due to the weight of the cells. Furthermore, the reinforcing liner is located on one side of the heat exchange assembly along the first direction, which improves the battery device's resistance to bottom balling and reduces the risk of battery device failure. By providing a mounting member outside the battery box, with at least a portion of the mounting member located on the bottom wall along the first direction away from the individual battery cells, the support, protection, and connection strength of the battery box are improved. In other words, the synergistic effect of the heat exchange assembly, reinforcing liner, mounting member, and battery box enhances the structural strength of the battery device. Additionally, due to the improved structural strength, the bottom protective plate can be eliminated, achieving both lightweighting and a reduction in the height dimension of the battery device, improving structural compactness. By improving the structural strength and reducing the weight of the battery device, the main frequency of the battery device is increased, which to some extent avoids resonance between the battery device and the electrical device during use, improving the reliability of the battery device. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0043] Figure 2 This is an exploded view of the battery device according to the first embodiment of this application;

[0044] Figure 3 This is a partial structural diagram of the battery device according to the second embodiment of this application;

[0045] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0046] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0047] Figure 6 for Figure 3 Cross-sectional view along the BB direction;

[0048] Figure 7 for Figure 6 Enlarged view of point D in the middle;

[0049] Figure 8 for Figure 4 Exploded view.

[0050] Explanation of reference numerals in the attached figures

[0051] 10. Battery cell; 20. Battery box; 21. Lower box; 22. Upper box; 23. Bottom wall; 24. Side wall; 30. Reinforcing liner; 31. First liner; 311. Main body; 312. First protrusion; 32. Second liner; 40. Mounting component; 41. First mounting plate; 411. First sub-part; 412. Second sub-part; 413. First flange; 42. Second mounting plate; 421. Second flange; 43. Clearance hole; 44. Mounting sleeve; 50. Heat exchange assembly; 51. Heat exchange plate; 52. Medium flow channel; 60. Connector; 70. Foaming component; 80. Coating; 90. Expansion beam; 100. Battery unit; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0052] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of this application, technical terms such as "first," "second," "third," and "fourth" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0055] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. Unless otherwise specified, all embodiments and optional embodiments of this application may be combined with each other to form new technical solutions. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments. Unless otherwise specified, all technical features and optional technical features of this application may be combined with each other to form new technical solutions.

[0056] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0057] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "projection" refers to an orthographic projection in which parallel projection lines are perpendicular to the projection plane.

[0061] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace, robotics, and many other fields.

[0062] In related technologies, electric vehicles and other electrical devices may experience battery deformation when subjected to external impacts such as gravel or debris, potentially leading to problems like battery box cracking and individual battery cell damage. Taking sheet metal stamping housings as an example, commonly used bottom-ball protective structures include the battery box, heat exchange components, and a bottom protective plate. The bottom protective plate is positioned outside the battery box, while the heat exchange components are located between the bottom protective plate and the battery box. While the bottom protective plate improves the structural strength of the battery device, it also increases its cost and weight. Therefore, achieving both lightweighting and structural strength of the battery device has become an important research direction in this field.

[0063] In view of this, in order to achieve both lightweighting and structural strength of the battery device, embodiments of this application provide a battery device including a battery box, a heat exchange assembly, at least one battery cell, a reinforcing liner, and a mounting member. The battery box includes a bottom wall and side walls surrounding the periphery of the bottom wall, the bottom wall and side walls together forming a receiving cavity. At least one battery cell is disposed within the receiving cavity. The heat exchange assembly is disposed within the receiving cavity and is used to contain a heat exchange medium; the heat exchange assembly is thermally connected to the battery cell. Along a first direction, the battery cell, heat exchange assembly, and bottom wall are arranged sequentially. The reinforcing liner is disposed within the receiving cavity, and at least a portion of the reinforcing liner is located on one side of the heat exchange assembly along the first direction. The mounting member is disposed outside the receiving cavity, and the battery device is connected to an external device via the mounting member. At least a portion of the mounting member is located on the side of the bottom wall facing away from the battery cell along the first direction. On the same projection plane perpendicular to the first direction, the orthographic projections of the reinforcing liner, heat exchange assembly, bottom wall, and mounting member overlap.

[0064] The battery device provided in this application includes a battery box and at least one battery cell. The battery box has a receiving cavity, and the battery cell is disposed within the receiving cavity, with the battery box providing protection for the battery cell. By placing the heat exchange assembly within the receiving cavity, the heat exchange efficiency of the heat exchange assembly can be improved, thereby enhancing the performance and reliability of the battery device. By providing a reinforcing liner inside the battery box, the reinforcing liner, together with the heat exchange assembly, can support the battery cell, reducing the risk of deformation of the battery box due to the weight of the battery cell. Furthermore, the reinforcing liner is disposed on one side of the battery heat exchange assembly along a first direction, which helps to improve the battery device's resistance to bottom balling and reduces the risk of battery device failure. By providing a mounting member outside the battery box, and disposing at least a portion of the mounting member on the bottom wall along the first direction away from the battery cell, the supporting effect, protective effect, and connection strength of the battery box are improved. In other words, the synergistic effect of the heat exchange assembly, the reinforcing liner, the mounting member, and the battery box helps to improve the structural strength of the battery device. Furthermore, by improving the structural strength of the battery pack, the bottom protective plate can be eliminated, achieving both weight reduction and a decrease in the height dimension, thus enhancing structural compactness. By increasing structural strength and reducing weight, the battery pack's operating frequency can be increased, which to some extent prevents resonance between the battery pack and the power source during operation, thereby improving its reliability.

[0065] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical device includes the battery device according to any embodiment of this disclosure, and the battery device is used to provide electrical energy.

[0066] The battery devices provided in this application can be used, but are not limited to, in vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, robots, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This disclosure does not impose any special limitations on the above-mentioned electrical equipment.

[0067] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices.

[0068] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0069] Please see Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may 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, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment 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, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0070] 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.

[0071] Figure 2 This is an exploded view of a battery device according to a first embodiment of this application. The battery device 100 mentioned in the embodiments of this application may include multiple battery cells 10 for providing voltage and capacity. The multiple battery cells 10 are connected in series, parallel, or mixed via a busbar.

[0072] In some embodiments, the battery apparatus 100 may include one or more battery cell assemblies. A battery cell assembly may include multiple battery cells 10, which are connected in series, parallel, or mixed connections via a busbar.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 10; as an example, one or more battery cell assemblies can constitute a battery module, which is formed by arranging and fixing multiple battery cell assemblies into a single module. As an example, a battery module can be formed by bundling multiple battery cell assemblies together with cable ties.

[0074] In some embodiments, the battery device 100 may be a battery pack, which includes a battery case 20 and one or more individual battery cells housed in the battery case 20.

[0075] As an example, one or more battery cell components can constitute a battery module, and the battery cell components can be housed in the battery case 20 by fixing the battery module in the battery case 20.

[0076] As an example, the battery cell assembly can also be housed in the battery box 20 by directly fixing multiple battery cells 10 to the battery box 20.

[0077] As an example, the battery box 20 may include an upper box 22 and a lower box 21. The upper box 22 and the lower box 21 are fastened together to form a closed space inside the battery box 20 to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first box may be a top cover or a bottom plate.

[0078] As an example, the battery box 20 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 box forms an enclosed space to accommodate individual battery cells.

[0079] In some embodiments, the battery box 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the battery box 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the battery box 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0080] Please see Figures 3 to 8 This application provides a battery device 100, which includes a battery case 20, a heat exchange assembly 50, at least one battery cell 10, a reinforcing liner 30, and a mounting member 40. The battery case 20 includes a bottom wall 23 and side walls 24 surrounding the periphery of the bottom wall 23, forming a receiving cavity. At least one battery cell 10 is disposed within the receiving cavity. The heat exchange assembly 50 is disposed within the receiving cavity and is used to contain a heat exchange medium; the heat exchange assembly 50 is thermally connected to the battery cell 10. The battery cell 10, heat exchange assembly 50, and bottom wall 23 are sequentially arranged along a first direction. The reinforcing liner 30 is disposed within the receiving cavity, and at least a portion of the reinforcing liner 30 is located on one side of the heat exchange assembly 50 along the first direction. The mounting member 40 is disposed outside the receiving cavity, and the battery device 100 is connected to an external device via the mounting member 40. At least a portion of the mounting member 40 is located on the side of the bottom wall 23 facing away from the battery cell 10 along the first direction. On the same projection plane perpendicular to the first direction, the orthographic projections of the reinforcing liner 30, heat exchange assembly 50, bottom wall 23, and mounting component 40 overlap.

[0081] In this embodiment of the application, the battery cell 10 can be a secondary battery, which refers to the battery cell 10 that can be used again after being discharged by recharging to activate the active material.

[0082] The battery cell 10 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.

[0083] A battery cell 10 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and / or discharging process of the battery cell 10, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator is disposed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0084] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0085] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0086] In some embodiments, the battery cell 10 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application embodiment does not specifically limit the type of electrolyte and can select one according to requirements. The electrolyte can be liquid, gel, or solid.

[0087] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0088] In some embodiments, the electrode assembly has a stacked structure.

[0089] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0090] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0091] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0092] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0093] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0094] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0095] In some embodiments, the electrode assembly has tabs (not shown) that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0096] In some embodiments, the battery cell 10 may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (such as a polypropylene housing), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc.

[0097] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells. Multi-prismatic battery cells are, for example, hexagonal prismatic battery cells. There are no particular limitations in the embodiments of this application.

[0098] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal pressure of the battery cell 10.

[0099] In other embodiments, the pressure relief mechanism may also be referred to as an explosion-proof valve.

[0100] As an example, the internal pressure or temperature of the battery cell 10 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 10 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 10.

[0101] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0102] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0103] The term "actuation" as used in this application refers to the pressure relief mechanism being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 10. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances inside the battery cell 10 are discharged outwards from the actuated portion as waste. This method enables the battery cell 10 to release pressure and temperature under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0104] The emissions from the battery cell 10 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0105] In some embodiments, the housing is provided with electrode terminals, which pass through the housing and are electrically connected to the electrode assembly via tabs.

[0106] In some specific embodiments, the electrode terminals are made of conductive metal, such as copper or aluminum.

[0107] The "multiple" mentioned in the embodiments of this application refers to two or more.

[0108] The battery box 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres.

[0109] The battery box 20 is used to install the battery cell 10. The battery box 20 can carry the battery cell 10, and the battery cell 10 is installed to the electrical equipment through the battery box 20.

[0110] For example, the battery box 20 is typically a cuboid structure. Both its length and width directions are parallel to the horizontal plane, and its length direction is parallel to the longest side of the cuboid structure. The height direction of the battery box 20 is perpendicular to the ground. For example, the length direction of the battery box 20 may be a first direction, the width direction a second direction, and the height direction a third direction; or the length direction may be the second direction, the width direction the first direction, and the height direction a third direction.

[0111] For example, such as Figure 3 and Figure 4 As shown, the first direction is represented by X, the second direction by Y, and the third direction by Z.

[0112] In some embodiments, the battery box 20 includes a bottom wall 23 and a side wall 24 surrounding the periphery of the bottom wall 23, the bottom wall 23 and the side wall 24 together forming a receiving cavity.

[0113] In some embodiments, the battery box 20 includes a lower box 21, which is constructed by stamping sheet metal. That is, the side walls 24 and the bottom wall 23 are configured to be integrally stamped from metal material.

[0114] For example, the lower housing 21 can be a basin-shaped structure formed by stamping sheet metal parts, that is, the internal space of the basin-shaped structure at least constitutes a partial receiving cavity for accommodating the battery cell 10.

[0115] By constructing the lower housing 21 as a sheet metal stamping, the structure is simple, easy to form, and the weight of the battery box 20 can be reduced to a certain extent.

[0116] In some embodiments, the battery box 20 includes an upper box 22, which is constructed by stamping sheet metal.

[0117] For example, the upper housing 22 can be a basin-shaped structure formed by stamping sheet metal parts, that is, the internal space of the basin-shaped structure at least constitutes a partial receiving cavity for accommodating the battery cell 10.

[0118] In other embodiments, the battery box 20 includes an upper box 22, which is constructed as a plate-like structure formed of sheet metal.

[0119] In some embodiments, the upper housing 22 may also be made of composite material.

[0120] In the embodiments of this application, by placing the heat exchange component 50 at the bottom of the battery cell 10, it is convenient to exchange heat between multiple battery cells 10, which helps to improve the heat exchange efficiency of the heat exchange component 50 to the battery cell 10.

[0121] By providing a reinforcing liner 30 inside the battery box 20, the reinforcing liner 30 can support the battery cell 10 together with the heat exchange assembly 50, reducing the risk of deformation of the battery box 20 due to the weight of the battery cell 10. Furthermore, the reinforcing liner 30 is located on one side of the battery heat exchange assembly 50 along the first direction, which helps to improve the bottom ball resistance of the battery device 100 and reduce the failure risk of the battery device 100.

[0122] For example, the reinforcing liner 30 is constructed by stamping sheet metal. In this way, both the structural strength and lightweight design of the reinforcing liner 30 can be achieved.

[0123] At least a portion of the reinforcing liner 30 is located on one side of the heat exchange assembly 50 along the first direction, which can enhance the supporting and protective functions of the heat exchange assembly 50.

[0124] As an example, in some implementations, a portion of the reinforcing liner 30 may be located on the side of the heat exchange assembly 50 facing away from the battery cell 10 along the first direction.

[0125] In this way, the surface of the heat exchange component 50 facing the battery cell 10 can be made as flat as possible, which facilitates the stable placement of the battery cell 10 and helps to improve the heat exchange efficiency.

[0126] In other embodiments, a portion of the reinforcing liner 30 may be located on the side of the heat exchange assembly 50 facing the battery cell 10 along the first direction.

[0127] The battery device 100 is connected to an external device via a mounting member 40. In other words, the mounting member 40 is used to support at least part of the weight of the battery device 100. Therefore, by placing at least part of the mounting member 40 on the side of the bottom wall 23 facing away from the battery cell 10 in the first direction, the mounting member 40 can resist side and bottom impacts, preventing excessive deformation and damage to the battery device 100 body due to impacts, and improving the structural strength and reliability of the battery device 100.

[0128] On the same projection plane perpendicular to the first direction, the orthographic projections of the reinforcing liner 30, heat exchange component 50, bottom wall 23 and mounting component 40 overlap. In this way, while improving the supporting and protective functions of the heat exchange component 50, the overall structural strength of the battery device 100 can also be improved.

[0129] In some implementations, please refer to Figure 4 and Figure 5 The heat exchange component 50 is configured as a metal plate. For example, the material of the heat exchange component 50 may be aluminum alloy, aluminum, etc.

[0130] Here, by setting the heat exchange component 50 as a metal plate, the metal plate has both good structural strength and good thermal conductivity. In other words, while ensuring that the heat exchange component 50 has a certain heat exchange efficiency, the heat exchange plate 51 can also have a certain structural strength.

[0131] For example, the heat exchange assembly 50 includes two heat exchange plates 51 stacked together, with a medium flow channel 52 defined between the two heat exchange plates 51.

[0132] Here, along the first direction, the battery cell 10, the heat exchange assembly 50 and the bottom wall 23 are arranged in sequence. That is, the heat exchange assembly 50 is arranged inside the cavity, which helps to improve the heat exchange efficiency.

[0133] The main frequency of the battery device 100 refers to its inherent frequency. Increasing the main frequency is to avoid resonance during driving and to protect the mechanical structure of the battery cells 10 and the battery device 100. The main frequency is positively correlated with the stiffness of the battery device 100 and negatively correlated with its weight. Therefore, increasing the main frequency of the battery device 100 can be mainly achieved by increasing its structural stiffness and reducing its weight.

[0134] For example, by adding an internal reinforcing liner 30 and a mounting member 40, with at least a portion of the reinforcing liner 30 located on one side of the heat exchange assembly 50 along the first direction and at least a portion of the mounting member 40 located on the side of the bottom wall 23 facing away from the battery cell 10 along the first direction, the rigidity of the battery device 100 is improved. Simultaneously, by eliminating the bottom protective plate structure, the overall weight of the battery device 100 is reduced, and the main frequency of the battery device 100 is increased. Furthermore, it is also beneficial to reduce the dimensions of the battery device 100 in the height direction.

[0135] The battery device 100 provided in this application embodiment includes a battery case 20 and at least one battery cell 10. The battery case 20 has a receiving cavity, and the battery cell 10 is disposed within the receiving cavity, providing protection for the battery cell 10. By disposing of the heat exchange assembly 50 within the receiving cavity, the heat exchange efficiency of the heat exchange assembly 50 can be improved, thereby enhancing the performance and reliability of the battery device 100. By providing a reinforcing liner 30 within the battery case 20, the reinforcing liner 30, together with the heat exchange assembly 50, can support the battery cell 10, reducing the risk of deformation of the battery case 20 due to the weight of the battery cell 10. Furthermore, the reinforcing liner 30 is disposed on one side of the battery heat exchange assembly 50 along a first direction, which helps to improve the battery device 100's resistance to bottom balling and reduces the risk of battery device 100 failure. By providing a mounting bracket 40 outside the battery box 20, and positioning at least a portion of the mounting bracket 40 on the bottom wall 23 facing away from the battery cell 10 along the first direction, the supporting, protective, and connection strength of the battery box 20 are enhanced. In other words, the synergistic effect of the heat exchange assembly 50, the reinforcing liner 30, the mounting bracket 40, and the battery box 20 contributes to improved structural strength of the battery device 100. Furthermore, due to the increased structural strength of the battery device 100, the bottom protective plate can be eliminated, achieving weight reduction of the battery device 100 and a decrease in its height dimension, thus improving structural compactness. By increasing the structural strength and reducing the weight of the battery device 100, the main frequency of the battery device 100 is increased, which to some extent prevents resonance between the battery device 100 and the electrical device during use, thereby improving the reliability of the battery device 100.

[0136] It should be noted that the reinforcing liner 30 has various structural forms.

[0137] In some embodiments, please refer to Figures 5 to 8 The reinforcing liner 30 includes a first liner 31 and a second liner 32 connected to each other. The first liner 31 is disposed on one side of the heat exchange assembly 50 along the first direction, and the second liner 32 is disposed on the side of the sidewall 24 facing the battery cell 10.

[0138] For example, the shape of the second liner 32 is adapted to the shape of the side wall 24 of the battery box 20, which helps to improve the support of the side wall 24 of the battery box 20 and further enhances the ability of the battery box 20 to resist side impacts, compression and other working conditions.

[0139] By placing the first liner 31 on one side of the heat exchange assembly 50 along the first direction, the ability of the battery box 20 and the heat exchange assembly 50 to resist impacts, compressions and other working conditions can be improved, and the heat exchange assembly 50 can be supported.

[0140] For example, the connection between the first liner 31 and the second liner 32 can form an arc surface adapted to the battery box 20. This helps to strengthen the fit of the liner 30 against the inner wall of the battery box 20, thereby improving the structural strength of the battery box 20.

[0141] There are multiple ways to connect the reinforcing liner 30.

[0142] In some embodiments, please refer to Figures 5 to 7 The heat exchange assembly 50, the reinforcing liner 30, and the bottom wall 23 are connected at overlapping portions along a first direction. For example, the heat exchange assembly 50, the reinforcing liner 30, and the bottom wall 23 are riveted or welded.

[0143] In some embodiments, the reinforcing liner 30 includes a main body 311 and a first protrusion 312 protruding toward the heat exchange assembly 50. The main body 311 abuts against or is connected to the bottom wall 23, and the first protrusion 312 abuts against or is connected to the heat exchange assembly.

[0144] The bottom wall 23 of the battery box 20 protrudes towards the heat exchange assembly 50 to form a second protrusion, and the heat exchange assembly 50, the first protrusion 312 and the second protrusion abut or connect.

[0145] Here, the reinforcing liner 30 is provided with a main body 311 and a first protrusion 312 protruding from the main body 311, so that the reinforcing liner 30 abuts or connects to both the heat exchange assembly 50 and the bottom wall 23, thereby further improving the structural strength of the battery device 100. At the same time, a space for filling foam or the like can be defined between the heat exchange assembly 50 and the bottom wall 23.

[0146] Here, by connecting the heat exchange assembly 50, the first liner 31 and the bottom wall 23, it is beneficial to improve the structural stability of the heat exchange assembly 50, the first liner 31 and the bottom wall 23. Through the synergistic effect between the heat exchange assembly 50, the first liner 31 and the bottom wall 23, it is beneficial to further improve the structural strength of the battery device 100.

[0147] In some embodiments, please refer to Figures 5 to 7 The battery device 100 includes at least one connector 60, which passes through the heat exchange assembly 50, the reinforcing liner 30 and the bottom wall 23. The material of the connector is different from that of the heat exchange assembly 50. The connector 60 is welded to the reinforcing liner 30 and the bottom wall 23.

[0148] For example, the connector 60 may include, but is not limited to, rivets, screws, bolts, etc.

[0149] In some embodiments, the heat exchange assembly 50 is made of a different material than the reinforcing liner 30 and the bottom wall 23. For example, the heat exchange assembly 50 may be made of one material, while the reinforcing liner 30 and the bottom wall 23 may be made of another material; or the heat exchange assembly 50 may be made of one material, the reinforcing liner 30 of another material, and the bottom wall 23 of yet another material, but the melting points of the materials of the reinforcing liner 30 and the bottom wall 23 are close. In this case, by connecting a connector 60 to the heat exchange assembly 50 with a melting point close to or the same as that of the reinforcing liner 30 and the bottom wall 23, the connector 60 can be welded to the reinforcing liner 30 and the bottom wall 23, thereby improving the connection strength between the heat exchange assembly 50, the reinforcing liner 30, and the bottom wall 23. The connector 60 can be riveted, interference-fitted, or welded to the heat exchange assembly 50.

[0150] In some embodiments, please refer to Figure 5 The mounting member 40 is provided with a clearance hole 43, and the connector 60 is disposed opposite to the clearance hole 43 along the first direction. That is to say, the clearance hole 43 is used to avoid the connector 60.

[0151] On the projection plane perpendicular to the height direction of the battery device 100, the projection of the connector 60 is located within the projection range of the clearance hole 43.

[0152] For example, the clearance hole 43 corresponds one-to-one with the connector 60.

[0153] The mounting component 40 is provided with a clearance hole 43, through which the connector 60 can be welded to the first liner 31 and the bottom wall 23 from the outside of the battery box 20, reducing the risk of welding slag falling into the battery box 20 during the welding process. In other words, the clearance hole 43 can facilitate welding and cleaning of welding slag while reducing the weight of the mounting component 40.

[0154] In other embodiments, the connector 60 can be welded to the reinforcing liner 30 and the bottom wall 23 from the inside of the battery box 20.

[0155] In some embodiments, please refer to Figures 6 to 7 The mounting component 40, the reinforcing liner 30, and the bottom wall 23 are connected to each other along the first direction.

[0156] For example, the overlapping portions of the mounting plate 40, the reinforcing liner 30, and the bottom wall 23 along the first direction are riveted or welded.

[0157] For example, the main body 311 of the first liner 31 (excluding the first protrusion 312), the main body 311 of the battery box 20 (excluding the second protrusion), and the mounting member 40 are connected, wherein the connection points of the mounting member 40, the first liner 31, and the battery box 20 are as follows: Figure 7 As shown at point E in the diagram.

[0158] For example, the mount 40, the first liner 31, and the battery box 20 are connected by three-layer spot welding.

[0159] The mounting member 40 is used to support at least part of the weight of the battery device 100. Therefore, by setting at least part of the mounting member 40 on the side of the bottom wall 23 facing away from the battery cell 10 in the first direction, and connecting the mounting member 40, the reinforcing liner 30, and the bottom wall 23, the weld cracking of the battery device 100 under test conditions such as vibration and impact tests can be avoided to a certain extent, thereby further improving the structural strength and reliability of the battery device 100. In addition, since the heat exchange component 50 does not directly contact or connect with the mounting member 40, the possibility of tearing of the heat exchange component 50 under conditions such as side impact and compression is reduced.

[0160] Here, by connecting the heat exchange assembly 50, the reinforcing liner 30 and the bottom wall 23, and connecting the mounting member 40, the reinforcing liner 30 and the bottom wall 23, it is beneficial to increase the constraint between the heat exchange assembly 50, the reinforcing liner 30, the mounting member 40 and the battery box 20, thereby improving the rigidity of the battery device 100.

[0161] In some embodiments, please refer to Figures 6 to 8 The number of reinforcing liner 30 and mounting piece 40 are both two. The two reinforcing liner 30 are respectively set on both sides of the battery box 20 along the second direction, and the two mounting pieces 40 are respectively set on both sides of the battery box 20 along the second direction.

[0162] In other words, the reinforcing liner 30 and the mounting component 40 correspond one-to-one.

[0163] By placing two reinforcing liner plates 30 on both sides of the battery box 20 along the second direction, and placing two mounting members 40 on both sides of the battery box 20 along the second direction, the reinforcing liner plates 30 and the mounting members 40 can work together to strengthen the battery box 20, improve the battery device 100's ability to resist side impacts, compression and other working conditions, and provide support and protection for the battery device 100.

[0164] In some embodiments, please refer to Figures 3 to 5 The battery device 100 includes a plurality of connectors 60, each connector 60 passing through the heat exchange assembly 50, the reinforcing liner 30, and the battery box 20, and the connectors 60 are welded to the heat exchange assembly 50, the reinforcing liner 30, and the battery box 20. The heat exchange assembly 50 has a plurality of connectors 60 spaced apart along at least one side of a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other.

[0165] The heat exchange component 50 may have multiple connectors 60 spaced apart on one side along the first direction, or multiple connectors 60 spaced apart on both sides along the first direction.

[0166] By providing a plurality of connectors 60 at intervals along at least one side of the heat exchange assembly 50 in the first direction, it is beneficial to improve the constraint on the heat exchange assembly 50, thereby improving the stability of the connection structure of the heat exchange assembly 50.

[0167] For example, the first direction is perpendicular to the second direction.

[0168] For example, the connection position between the reinforcing liner 30 and the mounting member 40 is spaced apart from the connection member 60, that is, the connection position between the reinforcing liner 30 and the mounting member 40 is spaced apart from the connection position between the reinforcing liner 30 and the heat exchange assembly 50.

[0169] For example, the connection point between the battery box 20 and the mount 40 is spaced apart from the connection point 60, that is, the connection point between the battery box 20 and the mount 40 is spaced apart from the connection point between the battery box 20 and the heat exchange assembly 50.

[0170] In some embodiments, please refer to Figures 3 to 5 The reinforcing liner 30 is provided with weight reduction holes.

[0171] The number of weight-reducing holes can be one or more.

[0172] Weight reduction holes can be set in areas where the structural strength requirement of the reinforcing liner 30 is not so high, which can reduce the weight of the reinforcing liner 30 while taking into account structural strength.

[0173] In some embodiments, please refer to Figures 5 to 8The mounting component 40 includes a first mounting plate 41, which includes a first sub-part 411 and a second sub-part 412 connected to each other. The first sub-part 411 is disposed on the side of the bottom wall 23 facing away from the battery cell 10 along a first direction, and the second sub-part 412 is disposed on the side wall 24 facing away from the battery cell 10 along a second direction. The second sub-part 412, the second liner 32, and the side wall 24 overlap and connect along the second direction; the first direction is perpendicular to the second direction. The overlapping portions of the first sub-part 411, the reinforcing liner 30, and the bottom wall 23 along the first direction are connected.

[0174] The connection points connecting the second sub-part 412, the second liner 32, and the side wall 24 are as follows: Figure 7 As shown at point F in the diagram.

[0175] For example, the shape of at least a portion of the second sub-part 412 is adapted to the shape of the side wall 24 of the battery box 20, which helps to improve the support of the side wall 24 of the battery box 20 and further enhances the ability of the battery box 20 to resist side impacts, compression and other working conditions.

[0176] By placing the first sub-part 411 at the bottom of the battery box 20, the battery box 20 and the bottom of the heat exchange assembly 50 can be protected against impacts, compressions and other working conditions, and the battery box 20 can be supported.

[0177] For example, the connection between the first sub-part 411 and the second sub-part 412 can form an arc surface adapted to the battery box 20. This facilitates the mounting member 40 to fit against the outer wall of the battery box 20, thereby improving the support and protection of the battery box 20.

[0178] By connecting the first sub-part 411, the first liner 31 and the bottom wall 23 of the battery box 20, and connecting the second sub-part 412, the second liner 32 and the side wall 24 of the battery box 20, the connection strength of the mount 40 is improved, thereby preventing the mount 40 from cracking under test conditions such as vibration test and impact test of the battery device 100.

[0179] In some embodiments, please refer to Figure 5 On a projection plane perpendicular to the height direction of the battery device 100, the projection of the first liner 31 is located within the projection range of the first sub-part 411.

[0180] In other words, the distance between the end of the first sub-part 411 away from the side wall 24 of the battery box 20 and the side wall 24 of the battery box 20 is greater than or equal to the distance between the end of the first liner 31 away from the side wall 24 of the battery box 20 and the side wall 24 of the battery box 20.

[0181] This will help to further improve the support and protection of the mounting component 40 for the battery box 20.

[0182] In some embodiments, please refer to Figures 3 to 5 In the first direction, the first sub-part 411 is connected to the battery box 20 in the area beyond the first liner 31. This can further constrain the first sub-part 411, which is beneficial to further improve the connection strength of the mount 40. This can further prevent the mount 40 from cracking at the weld during vibration testing, impact testing and other test conditions of the battery device 100.

[0183] Wherein, the connection position of the first sub-part 411 to the battery box 20 in the area extending beyond the first liner 31 is as follows: Figure 7 As shown at point G in the diagram.

[0184] In some embodiments, please refer to Figures 3 to 8 The mounting member 40 includes a second mounting plate 42, a second sub-part 412 folded away from the side wall 24 to form a first flange 413, and the second mounting plate 42 folded away from the side wall 24 to form a second flange 421. The first mounting plate 41 and the second mounting plate 42 are arranged along a first direction. The overlapping portions of the first flange 413 and the second flange 421 along the first direction are connected and used for connection with an external device. A portion of the reinforcing liner 30 overlaps with the side wall 24 along a second direction and is connected to the side wall 24 and the second mounting plate 42.

[0185] In other words, the first mounting plate 41 and the second mounting plate 42 together constitute at least part of the mounting component 40 of the battery device 100, which is used to connect with external devices. The first mounting plate 41 and the second mounting plate 42 are the main structures that support the battery device 100. The first mounting plate 41 and the second mounting plate 42 are arranged along the height direction of the battery box 20. Both the first mounting plate 41 and the second mounting plate 42 have the ability to resist side collisions, preventing the battery device 100 body from being deformed or damaged due to collisions, and reducing the probability of battery device 100 failure.

[0186] For example, the first flange 413 and the second flange 421 are stacked along the height direction of the battery box 20, so as to facilitate the connection between the first flange 413 and the second flange 421.

[0187] For example, the mount 40 also includes a mount sleeve 44, which is a fixed support structure for fixing the battery device 100 to the vehicle.

[0188] For example, the mounting sleeve 44 passes through the first flange 413 and the second flange 421.

[0189] In some embodiments, please refer to Figure 8 The battery device 100 also includes a coating 80, which is applied to the outer surface of the mount 40 and / or the battery box 20.

[0190] This helps to further improve the structural strength of the mounting component 40, thereby enhancing the protection of the battery box 20.

[0191] Coating 80 can be a stone-impact resistant coating, such as a polyurea coating.

[0192] In some embodiments, please refer to Figures 7 to 8 The battery assembly 100 also includes a foaming element 70, which is at least filled between the heat exchange assembly 50 and the bottom wall 23 of the battery box 20.

[0193] By filling at least the space between the heat exchange component 50 and the bottom wall 23 of the battery box 20 with foam 70, it is beneficial to further improve the impact resistance of the battery device 100.

[0194] The heat exchange component 50 is fixed on the internal reinforcing liner 30 on both sides along the first direction. The stamping structure of the reinforcing liner 30 provides the foaming component 70 with overflow space and venting space, ensuring that the foaming component 70 is fully foamed, evenly distributed, and fully filled between the heat exchange component 50 and the housing body, meeting the impact resistance requirements of the battery device 100. At the same time, the gas generation problem of the foaming component 70 can be discharged through the internal balance valve of the battery device 100 to improve the problem of bulging of the battery box 20.

[0195] In one specific embodiment, please refer to Figures 3 to 8 The second mounting plate 42, the side wall 24 of the battery box 20, and the reinforcing liner 30 are connected by three layers of spot welding. The first mounting plate 41, the side wall 24 of the battery box 20, and the reinforcing liner 30 are connected by three layers of spot welding. The first mounting plate 41, the bottom wall 23 of the battery box 20, and the reinforcing liner 30 are connected by three layers of spot welding. The heat exchange component, the bottom wall 23 of the battery box 20, and the reinforcing liner 30 are connected by three layers of spot welding. The first mounting plate 41 and the bottom wall 23 of the battery box 20 are connected by two layers of spot welding. Through the synergistic effect of the heat exchange component 50, the reinforcing liner 30, the mounting component 40, and the battery box 20, the rigidity of the battery device 100 is improved by increasing internal constraints and support. At the same time, the bottom protective plate structure is eliminated, reducing the overall weight of the battery device 100 and increasing the main frequency of the battery device 100. To a certain extent, this can prevent the welds of the battery device 100 from cracking under test conditions such as vibration and impact tests. The battery cell 10 is placed on top of the heat exchange assembly 50, replacing the supporting function of the battery box 20. At the same time, when subjected to external impact, the coating 80, battery box 20, foaming part 70, reinforcing liner 30 and mounting part 40 can ensure that the heat exchange assembly 50 is not damaged, and at the same time ensure that the internal module is not damaged.

[0196] In some embodiments, please refer to Figure 3Multiple battery cells 10 are arranged along a third direction, and the battery device 100 includes at least one expansion beam 90, which extends along a second direction and intersects with the third direction.

[0197] For example, the battery device 100 includes a plurality of expansion beams 90, which are spaced apart along a third direction of the battery box 20.

[0198] Multiple battery cells 10 are arranged along a third direction to form a battery pack, and expansion beams 90 are provided at both ends of the battery pack along the third direction.

[0199] Here, the expansion beam 90 is used to constrain the battery pack in the third direction and at least to withstand the expansion force of the individual battery cells 10. Specifically, the expansion force refers to the force exerted on the housing due to the expansion and deformation of the individual battery cells 10. As an example, the expansion beam 90 primarily withstands the expansion force along the third direction.

[0200] In some embodiments, please refer to Figure 3 The heat exchange assembly 50, the battery box 20, and the expansion beam 90 are connected. Exemplarily, the heat exchange assembly 50, the battery box 20, and the expansion beam 90 are connected by three-layer spot welding.

[0201] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0202] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a battery box comprising a bottom wall and a side wall surrounding a periphery of the bottom wall, the bottom wall and the side wall jointly forming a containing cavity; at least one battery cell arranged in the containing cavity; a heat exchange assembly arranged in the containing cavity, the heat exchange assembly being used for containing a heat exchange medium, the heat exchange assembly being in heat conduction connection with the battery cell; in a first direction, the battery cell, the heat exchange assembly and the bottom wall are arranged in sequence; a reinforcing lining plate arranged in the containing cavity, and at least part of the reinforcing lining plate is located on one side of the heat exchange assembly in the first direction; a mounting member arranged outside the containing cavity, the battery device being connected with an external device through the mounting member; at least part of the mounting member is located on one side of the bottom wall away from the battery cell in the first direction; in the same projection plane perpendicular to the first direction, the reinforcing lining plate, the heat exchange assembly, the bottom wall and the mounting member have overlapping projections.

2. The battery device according to claim 1, characterized by The reinforcing lining plate comprises a main body portion and a first protruding portion protruding towards the heat exchange assembly, the main body portion being in abutment or connection with the bottom wall, and the first protruding portion being in abutment or connection with the heat exchange assembly.

3. The battery device of claim 1, wherein The reinforcing lining plate comprises a first lining plate arranged on one side of the heat exchange assembly in the first direction and a second lining plate arranged on one side of the side wall facing the battery cell.

4. The battery device of claim 1, wherein The heat exchange assembly, the reinforcing lining plate and the bottom wall are connected at the portion overlapping in the first direction.

5. The battery device of claim 1, wherein The battery device comprises at least one connecting member penetrating the heat exchange assembly, the reinforcing lining plate and the bottom wall, the connecting member being made of a material different from that of the heat exchange assembly, and the connecting member being welded to the reinforcing lining plate and the bottom wall.

6. The battery device of claim 5, wherein The mounting member is provided with a relief hole, and the connecting member is arranged opposite to the relief hole in the first direction.

7. The battery device according to any one of claims 1 to 6, characterized by Part of the reinforcing lining plate is located on one side of the heat exchange assembly away from the battery cell in the first direction.

8. The battery device according to any one of claims 1 to 6, characterized by The mounting member, the reinforcing lining plate and the bottom wall are connected at the portion overlapping in the first direction.

9. The battery device according to any one of claims 1 to 6, characterized by The number of the reinforcing lining plates and the number of the mounting members are both two, two reinforcing lining plates are arranged on two sides of the battery box in a second direction respectively, two mounting members are arranged on two sides of the battery box in the second direction respectively, and the first direction is perpendicular to the second direction.

10. The battery device according to any one of claims 1 to 6, characterized by The reinforcing lining plate is provided with a weight-reducing hole.

11. The battery device according to any one of claims 1 to 6, characterized by The mounting member comprises a first mounting plate comprising a first sub-portion and a second sub-portion connected to each other, the first sub-portion being arranged on one side of the bottom wall away from the battery cell in the first direction, the second sub-portion being arranged on one side of the side wall away from the battery cell in a second direction, and the second sub-portion, the reinforcing lining plate and the side wall overlapping and being connected in the second direction; The first direction is perpendicular to the second direction; The first sub-portion, the reinforcing lining plate and the bottom wall are connected at the portion overlapping in the first direction.

12. The battery device of claim 11, wherein, The mounting member comprises a second mounting plate, the second sub-portion is folded in a direction away from the side wall to form a first folded edge portion, the second mounting plate is folded in a direction away from the side wall to form a second folded edge portion, the first mounting plate and the second mounting plate are arranged along the first direction, the first folded edge portion is connected to a portion of the second folded edge portion which overlaps along the first direction, and is used to connect with an external device; a portion of the reinforcing lining plate overlaps the side wall along the second direction, and is connected with the side wall and the second mounting plate.

13. The battery device according to any one of claims 1 to 6, characterized by The battery device further comprises a coating layer coated on an outer surface of the mounting member and / or the battery box.

14. The battery device according to any one of claims 1 to 6, wherein The battery device further comprises a foaming member at least filled between the heat exchange assembly and the bottom wall.

15. The battery device according to any one of claims 1 to 6, wherein The side wall and the bottom wall are configured to be integrally punched by a metal material.

16. An electrical device, comprising: The battery device comprises any one of claims 1 to 15.

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