Battery apparatus, vehicle and electrical apparatus

Abstract

A battery apparatus (100), a vehicle (1000) and an electrical apparatus. The battery apparatus (100) comprises a box body (10), a first cavity (101) being provided in the box body (10); and battery cells (20) accommodated in the first cavity (101), one end of each battery cell (20) in a first direction being connected to the box body (10), and the other end of each battery cell (20) in the first direction being used for supporting the box body (10). Each battery cell (20) comprises a casing (23), an electrode assembly (24), electrode terminals (21) and a first pressure relief structure (22). The electrode terminals (21) and the first pressure relief structure (22) are respectively arranged at two ends of the casing (23) in the first direction. The electrode assembly (24) is arranged in the casing (23), and is connected to the electrode terminals (21). The ends of the battery cells (20) provided with the electrode terminals (21) are used for supporting the box body. The ends of the battery cells (20) having the electrode terminals (21) provide support for the box body (10), so as to improve the bearing capacity of a box cover.

Description

Battery device, vehicle and electric device

[0001] This application claims priority to the Chinese patent application No. 202422155082.9, filed on September 3, 2024, and entitled "Battery device, vehicle and electric device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of power battery devices, and in particular relates to a battery device, a vehicle and an electric device. BACKGROUND

[0003] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery device technology is an important factor for their development.

[0004] In the current battery device, the strength of the top plate of the battery device box is usually low, which leads to poor load-bearing performance of the top of the battery device box and poor protection performance of the battery device. SUMMARY

[0005] In view of the above problems, the present application provides a battery device, a vehicle and an electric device, which can alleviate the problem of low strength and poor load-bearing performance of the cover of the current battery device box.

[0006] In a first aspect, the embodiments of the present application provide a battery device, comprising: a box body, a first cavity being arranged in the box body; a battery monomer, being accommodated in the first cavity, one end of the battery monomer in a first direction being connected to the box body, and the other end of the battery monomer in the first direction being used to support the box body; the battery monomer comprising a shell, an electrode assembly, an electrode terminal and a first pressure relief structure, the electrode terminal and the first pressure relief structure being arranged at two ends of the shell in the first direction respectively, the electrode assembly being arranged in the shell and connected to the electrode terminal; wherein the end of the battery monomer provided with the electrode terminal is used to support the box body.

[0007] In the technical solution of the present embodiment, the end of the battery monomer provided with the electrode terminal is used to support the box body, so as to improve the load-bearing capacity of the cover; the first pressure relief structure is arranged on the side opposite to the electrode terminal, so that the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer is not easy to directly impact the cover.

[0008] In some embodiments, the box body further comprises a second cavity, and the box body is provided with a relief hole communicating the first cavity and the second cavity, and the first pressure relief structure is arranged opposite to the relief hole in the first direction.

[0009] In the technical scheme of the embodiment, the second cavity and the avoiding hole are arranged in the box body, and the first pressure relief structure is opposite to the avoiding hole, so that the high-temperature and high-pressure flue gas generated by thermal runaway of the battery monomer can be discharged to the second cavity through the first pressure relief structure, thereby reducing the high-temperature and high-pressure flue gas remaining in the first cavity, improving the safety performance of the battery device, and reducing the risk of damage to other structures outside the box body caused by thermal runaway of the battery monomer.

[0010] In some embodiments, the box body further comprises a frame structure, a box cover, a bottom structure and a guard plate, the frame structure is arranged through in the first direction, the box cover closes one end of the frame structure in the first direction, the bottom structure closes the other end of the frame structure in the first direction, the avoiding hole is arranged on the bottom structure, and the box cover, the frame structure and the bottom structure enclose the first cavity; the guard plate is arranged on the side of the bottom structure away from the box cover to form the second cavity with the bottom structure.

[0011] The technical scheme of the embodiment provides specific structures of some box bodies, and the first cavity and the second cavity are formed by the bottom structure and the guard plate to reduce the negative influence of the high-temperature and high-pressure flue gas discharged into the second cavity on the battery monomer.

[0012] In some embodiments, the bottom structure comprises a plate structure; the bottom structure is made of a metal material through a casting forming process, or the bottom structure comprises a profile.

[0013] The technical scheme of the embodiment provides specific structures of some bottom structures, so that the bottom structure is made of a metal material through a casting forming process or is a profile, so that the bottom structure can have high strength and can better and more stably support the battery monomer.

[0014] In some embodiments, the bottom structure comprises a heat exchange assembly.

[0015] The technical scheme of the embodiment provides specific structures of another bottom structure, so that the bottom structure comprises a heat exchange assembly, so that the heat exchange assembly can control the temperature of the battery device during normal use of the battery device and can reduce the overall temperature of the battery device in the case of thermal runaway of the battery monomer.

[0016] In some embodiments, the box body is provided with a second pressure relief structure, and the second pressure relief structure is used to communicate the first cavity with a space outside the box body; the second cavity is communicated with the first cavity at a position close to the second pressure relief structure, so as to discharge the substances in the second cavity to the space outside the box body through the second pressure relief structure.

[0017] The technical scheme of the embodiment is characterized in that the second pressure relief structure is arranged, so that the high-temperature and high-pressure flue gas in the second cavity can be discharged to the outside of the box through the second pressure relief structure; meanwhile, the high-temperature and high-pressure flue gas in the box can also be directly discharged to the outside of the box through the second pressure relief structure, so as to reduce the high-temperature and high-pressure flue gas remaining in the box.

[0018] In some embodiments, the battery device further comprises a first support, which is located between the one end of the shell provided with the electrode terminal and the box in the first direction, one side of the first support is connected to the shell, and the other side of the first support is connected to the box.

[0019] The technical scheme of the embodiment is characterized in that the first support is arranged between the battery monomer and the box, so that the box is supported by the first support; meanwhile, the battery monomer is less likely to directly contact the box, so that the damage to the battery monomer caused by the expansion and friction of the box and the battery monomer can be reduced.

[0020] In some embodiments, the first support comprises a first support part and a first extension part connected to the first support part, the first support part is connected to the shell and arranged away from the electrode terminal; the first extension part is arranged on the side of the first support part away from the battery monomer, the first extension part is connected to the box, and the first extension part is arranged opposite to and spaced apart from the electrode terminal.

[0021] The technical scheme of the embodiment is characterized in that the first support part provides support for the first extension part, so that the first extension part can support the box; the first extension part is arranged spaced apart from the electrode terminal, so that the first extension part is less likely to contact the electrode terminal, thereby reducing the risk of the first extension part rubbing against or colliding with the electrode terminal and reducing the damage that the electrode terminal may suffer.

[0022] In some embodiments, the shell comprises a shell body and an end cover connected to the shell body, the end cover is arranged on the side of the shell body facing the box cover, the electrode terminal is arranged on the end cover, and the first pressure relief structure is arranged on the side of the shell body opposite to the end cover; the first support part abuts against the end cover, and the first extension part is arranged spaced apart from the end cover.

[0023] The technical scheme of the embodiment provides specific structures of some battery monomers, so that the first support part abuts against the end cover, so that the battery monomer can be supported by the shell body and the end cover; the first extension part is arranged spaced apart from the end cover, so as to reduce the risk of the first extension part rubbing against or colliding with the electrode terminal and reduce the damage that the electrode terminal may suffer.

[0024] In some embodiments, in the first direction, the projection of the first support part on the end cover is away from the projection of the electrode terminal on the end cover.

[0025] The first support part is staggered with the electrode terminal, so as to reduce the friction and collision damage of the first support part to the electrode terminal, thereby reducing the risk of damage to the electrode terminal and improving the stability of the battery device.

[0026] In some embodiments, in the first direction, the projection of the first support part on the corresponding side wall of the box body at least partially overlaps with the projection of the side wall of the shell body on the corresponding side wall of the box body.

[0027] In the technical solution of the embodiment, at least part of the first support part in the first direction can be opposite to the shell body, so that the first support part can transmit part of the force borne by it to the shell body, thereby enabling the shell body to better support the first support part and further improving the strength of the box body.

[0028] In some embodiments, the first support part is a hard insulating structural part.

[0029] In the technical solution of the embodiment, the first support part is a hard structural part, so that the first support part can better support the box body.

[0030] In some embodiments, the battery device further comprises a second support part, one side of the second support part being connected to the first extension part and / or the box body, and the other side of the second support part being at least partially connected to the electrode terminal.

[0031] In the technical solution of the embodiment, the second support part is arranged between the first extension part and the end cover, and the first extension part and / or the box body is supported by the second support part, so that the first support part can better support the box body, thereby better improving the strength of the box body.

[0032] In some embodiments, the second support part comprises a second support part and a second extension part connected to the second support part, one side of the second support part being connected to the first extension part and / or the box body, and the other side of the second support part being connected to the shell body and being staggered with the electrode terminal; one side of the second extension part being connected to the first extension part and / or the box body, and the other side of the second extension part being opposite to the electrode terminal and being connected to the electrode terminal.

[0033] In the technical solution of the embodiment, the second support part comprises a second support part and a second extension part, the first extension part is supported by the second support part to improve the support performance of the first extension part to the box body, and the space between the first extension part and the electrode terminal is filled by the second extension part to reduce the gap between the box body and the battery monomer, thereby further improving the strength of the box body.

[0034] In some embodiments, at least part of the second support part is a hard insulating structure or a flexible insulating structure.

[0035] The technical solution of the embodiment provides the structure of the second support member, so that the second support member can better support the box body, or the risk of damage to the electrode terminal can be reduced.

[0036] In some embodiments, the hardness of the second support member is less than or equal to the hardness of the first support member.

[0037] In the technical solution of the embodiment, because the second support member is in contact with the electrode terminal, the hardness of the second support member is less than or equal to the hardness of the first support member, so that the risk of damage to the electrode terminal by the second support member can be reduced.

[0038] In some embodiments, the tensile modulus of the first support member is greater than or equal to 30 Gpa; and / or the tensile modulus of the second support member is greater than or equal to 30 Gpa.

[0039] The technical solution of the embodiment provides the strength parameters and ranges of the first support member and / or the second support member, so that the first support member and / or the second support member have high strength, thereby better supporting the box body.

[0040] In some embodiments, the second support part is a hard insulating structure, and the second extension part is a hard insulating structure or a flexible insulating structure.

[0041] In the technical solution of the embodiment, the second support part is a hard insulating structure, so that the second support part can better support the first extension part, thereby better improving the strength of the box cover; the second extension part is a hard or flexible insulating structure, so that the second extension part can support the first extension part, reduce the gap between the first extension part and the battery monomer, and also reduce the risk of damage to the electrode terminal by the second extension part.

[0042] In a second aspect, the embodiment of the application further provides a vehicle comprising the battery device provided by some embodiments of the first aspect, wherein the box cover of the box body is used as at least part of the floor structure of the vehicle.

[0043] In a third aspect, the embodiment of the application further provides a power consumption device comprising the battery device provided by some embodiments of the first aspect.

[0044] The above description is only a summary of the technical solution of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the present application. Like reference numerals designate corresponding parts throughout the several views. In the drawings:

[0046] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0047] Fig. 2 is an exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0048] Fig. 3 is an exploded structural schematic diagram of a battery cell according to some embodiments of the present application;

[0049] Fig. 4 is an exploded structural schematic diagram of a box according to some embodiments of the present application;

[0050] Fig. 5 is a front schematic diagram of a battery device according to some embodiments of the present application;

[0051] Fig. 6 is a sectional schematic diagram along line A-A in Fig. 5;

[0052] Fig. 7 is a partial enlarged schematic diagram at B in Fig. 6;

[0053] Fig. 8 is a partial enlarged schematic diagram at C in Fig. 7;

[0054] Fig. 9 is a partial enlarged schematic diagram at D in Fig. 7.

[0055] The meanings of the reference signs in the drawings are as follows: 1000, vehicle; 100, battery device; 10, box; 101, first cavity; 11, box cover; 12, bottom structure; 121, avoiding hole; 13, guard plate; 131, second cavity; 14, frame structure; 15, second pressure relief structure; 20, battery cell; 21, electrode terminal; 22, first pressure relief structure; 23, shell; 231, shell body; 232, end cover; 24, electrode assembly; 30, first support; 31, first support part; 32, first extension part; 40, second support; 41, second support part; 42, second extension part; 200, motor; 300, controller. Embodiments of the present application

[0056] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0057] 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 be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0059] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0061] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] At present, from the development of market situation, the application of power battery device is more and more widely. The power battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery device, the market demand is also increasing.

[0065] The box body of the battery device usually includes a lower box body and an upper box body. Among them, the lower box body is mainly used for carrying the battery monomer and providing protection for the battery monomer, and the strength of the lower box body is usually high. Compared with the lower box body, the upper box body is mainly used for blocking the interference of the environment outside the box body to the battery monomer, so the upper box body is usually a sheet metal part, a plastic part or other structural part with lower strength. In the battery device in which the battery monomer is placed in the positive direction, the exhaust space for thermal runaway needs to be reserved between the upper box body and the battery monomer, and the electrical gap between the gasket and the upper box body also needs to be reserved. At this time, the battery monomer is difficult to provide support for the upper box body, and the upper box body can only be supported by the lower box body, so the overall strength of the upper box body is low; because the connection part of the upper box body and the lower box body is usually located at the peripheral edge of the upper box body, the strength of the middle part of the upper box body is lower due to the lack of support.

[0066] Accordingly, the upper box body is more likely to deform and other abnormal conditions during the use of the battery device, resulting in poor protection performance of the upper box body to the battery monomer; the force borne by the upper box body is usually transmitted to the lower box body through the connection part of the peripheral edge of the upper box body and the lower box body, and the middle part of the upper box body lacks support, resulting in lower strength and more prone to deformation of the middle part of the upper box body. Especially in the vehicle with the battery device as the floor, the upper box body is used to provide support for the passengers and goods, and the passengers and goods will directly contact the upper box body; in this case, the strength requirement of the upper box body is higher, and the current sheet metal and plastic upper box body is difficult to meet the demand, and the support of the lower box body to the upper box body is also difficult to meet the demand of the vehicle for the support performance of the upper box body.

[0067] In order to improve the strength of the upper box body, the material of the upper box body can be replaced by an alloy or a reinforcing beam is arranged on the upper box body. However, such arrangement will cause the overall weight of the battery device to increase substantially, and will also cause the thickness of the battery device to increase; and the main purpose of using the battery device as the vehicle floor is to reduce the overall weight of the vehicle and increase the passenger cabin space, and arranging the alloy upper box body or the reinforcing beam is contrary to the original design intention of using the battery device as the vehicle floor.

[0068] At present, there are also some structures in which the battery monomer is inverted and installed on the upper box body. In such structures, the battery monomer is fixed to the upper box body, which improves the strength of the upper box body, but the other end of the battery monomer is suspended, and the upper box body is still supported by the lower box body, and the supporting performance of the upper box body still cannot meet the demand of the vehicle on the supporting performance of the upper box body.

[0069] Based on the above considerations, in order to alleviate the problem that the cover strength of the battery device box is low and the load bearing performance is poor, the embodiments of the present application provide a battery device, which makes one end of the battery monomer connected to the bottom structure of the box body, and the other end of the battery monomer provides support for the cover of the box body; at the same time, the pressure relief structure of the battery monomer is arranged on the side of the battery monomer facing the bottom structure.

[0070] In such a battery device, the battery monomers arranged in the box body can all provide support for the cover, greatly improving the strength of the cover and making the supporting performance of the cover more uniform, and the situation that the middle part is low in strength is less likely to occur; the pressure relief structure is arranged on the side of the battery monomer facing the bottom structure, so that the pressure relief structure is away from the cover, i.e. away from the passenger cabin, in the case of thermal runaway of the battery monomer, the high-temperature and high-pressure flue gas generated by thermal runaway is difficult to directly impact the cover, so as to reduce the damage of thermal runaway to passengers and articles, and improve the safety performance of the battery device.

[0071] The battery device disclosed in the embodiments of the present application can be used in various energy storage systems using the battery device as a power source or an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc.; and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0072] The following embodiments take a power consumption device of an embodiment of the present application as a vehicle 1000 for example for convenient description.

[0073] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, and the controller 300 is used to control the battery device 100 to supply power to the motor 200, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0074] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Referring to FIG. 2, FIG. 2 is an exploded view of the battery device 100 according to some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. The box body 10 is used to provide a containing space for the battery cell 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include an upper box body and a lower box body, and the upper box body and the lower box body are mutually covered to jointly define a containing space for containing the battery cell 20. The lower box body can be a hollow structure with one end open, and the upper box body can be a plate-shaped structure, which is covered on the open side of the lower box body to jointly define the containing space with the lower box body. Alternatively, the upper box body and the lower box body can both be hollow structures with one side open, and the open side of the upper box body is covered on the open side of the lower box body. Of course, the box body 10 formed by the upper box body and the lower box body can have various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery device 100, the battery cell 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole of the multiple battery cells 20 is contained in the box body 10. Alternatively, the multiple battery cells 20 can be first connected in series, in parallel, or in a mixed manner to form a battery device 100 module, and then multiple battery device 100 modules are connected in series, in parallel, or in a mixed manner to form a whole, which is contained in the box body 10. The battery device 100 can further include other structures, for example, the battery device 100 can further include a current combiner for realizing electrical connection between the multiple battery cells 20.

[0077] Each battery cell 20 can be a secondary battery cell or a primary battery cell; can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0078] Referring to FIG. 3, FIG. 3 is an exploded structural schematic diagram of the battery cell 20 according to some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery device 100. As shown in the figure, the battery cell 20 includes a shell 23, an electrode assembly 24, and other functional components.

[0079] The shell 23 includes a shell body 231 and an end cap 232. The end cap 232 refers to a component that covers the opening of the shell body 231 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 232 can be adapted to the shape of the shell 23 to fit the shell 23. Alternatively, the end cap 232 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cap 232 is not easy to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cap 232 can be provided with functional components such as the electrode terminal 21. The electrode terminal 21 can be used to electrically connect with the electrode assembly 24 for outputting or inputting the electric energy of the battery cell 20. In some embodiments, the end cap 232 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cap 232 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating piece can also be provided on the inner side of the end cap 232, which can be used to isolate the electrical connection components in the shell 23 from the end cap 232 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0080] The shell body 231 is a component for fitting the end cover 232 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 24, the electrolyte and other components. The shell body 231 and the end cover 232 can be independent components, an opening can be provided on the shell body 231, and the end cover 232 is made to cover the opening to form the shell 23 and form the internal environment of the battery cell 20. Without limitation, the end cover 232 and the shell body 231 can also be integrated, specifically, the end cover 232 and the shell body 231 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the inside of the shell body 231, the end cover 232 is made to cover the shell body 231. The shell body 231 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell body 231 can be determined according to the specific shape and size of the electrode assembly 24. The material of the shell body 231 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations thereto.

[0081] The electrode assembly 24 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 24 can be contained in the shell 23. The electrode assembly 24 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting the main body of the electrode assembly 24, and a portion without active material constituting the tab of the positive electrode sheet and the negative electrode sheet, respectively. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery device 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab connects the electrode terminal 21 to form a current loop.

[0082] In a first aspect, with reference to FIGS. 4-6, the present application provides a battery device 100, comprising a box body 10 and a battery cell 20. The box body 10 is provided with a first cavity 101; the battery cell 20 is accommodated in the first cavity 101, and one end of the battery cell 20 in a first direction is connected to the box body 10, and the other end of the battery cell 20 in the first direction is used to support the box body 10; the battery cell 20 comprises a shell 23, an electrode assembly 24, an electrode terminal 21 and a first pressure relief structure 22, the electrode terminal 21 and the first pressure relief structure 22 are respectively provided at two ends of the shell 23 in the first direction, the electrode assembly 24 is provided in the shell 23, and the electrode assembly 24 is connected to the electrode terminal 21; wherein one end of the battery cell 20 provided with the electrode terminal 21 is used to support the box body 10.

[0083] In the figure, the direction in which the X-axis lies is the length direction of the battery device 100, the direction in which the Y-axis lies is the width direction of the battery device 100, and the direction in which the Z-axis lies is the height direction of the battery device 100.

[0084] The box body 10 refers to a structure in the battery device 100 for providing a containing space for the battery monomer 20; the box body 10 is internally provided with a first cavity 101, which refers to a space in the box body 10 for containing the battery monomer 20 or other structures; the first cavity 101 can be a cuboid space, or a prismatic, cylindrical or other shaped space.

[0085] The battery monomer 20 is contained in the first cavity 101, and the number of the battery monomer 20 can be one, two or more; when the number of the battery monomer 20 is two or more, the plurality of battery monomers 20 can be arranged in an array along the length direction X and / or the width direction Y of the box body 10.

[0086] The battery monomer 20 is connected to the box body 10 at one end in the first direction, that is, the side of the box body 10 connected to the battery monomer 20 can bear the battery monomer 20 and provide support for the battery monomer 20; the battery monomer 20 can be directly connected to the box body 10, or indirectly connected to the box body 10 through an intermediate structure; the battery monomer 20 can be fixedly connected to the box body 10 by welding, bonding or other means, or can be detachably connected to the box body 10 by screwing, clamping or other means.

[0087] The other end of the battery monomer 20 in the first direction is used to provide support for the corresponding side wall of the box body 10; the battery monomer 20 can directly abut against the corresponding side wall of the box body 10 to provide support for the box body 10, or an intermediate structure can be provided between the battery monomer 20 and the box body 10, so that the battery monomer 20 can provide support for the intermediate structure and indirectly provide support for the box body 10 through the intermediate structure; according to the arrangement mode of the battery monomer 20 and the orientation of the first direction, the corresponding side wall of the box body 10 can be the top plate or the bottom plate of the box body 10, or the side structure of the box body 10.

[0088] For example, the battery device 100 usually includes a plurality of battery monomers 20, and the plurality of battery monomers 20 are arranged in an array along the length direction X and the width direction Y of the battery device 100, and each battery monomer 20 can provide support for the box body 10; at this time, each position of the box body 10 opposite to the battery monomer 20 can be supported, thereby greatly improving the strength of the corresponding side wall of the box body 10, and the plurality of battery monomers 20 can uniformly provide support for the corresponding side wall of the box body 10, so that the strength of each part of the corresponding side wall of the box body 10 can be improved more uniformly.

[0089] The electrode terminal 21 refers to a structure in the battery monomer 20 for electrically connecting with the electrode assembly 24 and other structures outside, and is used for outputting or inputting the electric energy of the battery monomer 20.

[0090] The first pressure relief structure 22 refers to a structure in the battery monomer 20 for relieving the internal pressure when the internal pressure or temperature of the battery monomer 20 reaches a threshold value, which can be an explosion-proof valve or other pressure relief structure.

[0091] The first pressure relief structure 22 is located on the opposite side of the electrode terminal 21 along the first direction, and the side of the battery monomer 20 provided with the electrode terminal 21 is used to provide support for the box body 10, while the end of the battery monomer 20 provided with the first pressure relief structure 22 is connected to the box body 10, that is, the two sides of the battery monomer 20 along the first direction are connected to the two sides of the box body 10 along the first direction, so that the battery monomer 20 can provide support for the box body 10 along the first direction.

[0092] The first direction can be the height direction Z of the box body 10, or the length direction X or the width direction Y of the box body 10, and can also be other directions; for example, the first direction is the height direction Z of the box body 10.

[0093] Since the battery monomer 20 is provided with the electrode terminal 21, the electrode terminal 21 can be directly abutted to the box body 10, or an intermediate structure can be provided between the electrode terminal 21 and the box body 10.

[0094] For example, the first direction is the height direction Z of the box body 10, and the battery monomer 20 can provide support for the top plate of the box body 10, the electrode terminal 21 is located at the upper end of the battery monomer 20, and the first pressure relief structure 22 is located at the lower end of the battery monomer 20; since the top plate of the box body 10 is supported by the battery monomer 20 and has strong bearing capacity, the box body 10 can serve as the floor of the vehicle 1000, and the end of the battery monomer 20 provided with the electrode terminal 21 faces the inside of the vehicle 1000; in the case of thermal runaway of the battery monomer 20, this arrangement can make the high-temperature and high-pressure flue gas generated by the battery monomer 20 first erupt to the bottom of the box body 10, so as to reduce the impact of the high-temperature and high-pressure flue gas on the top plate of the box body 10, thereby protecting the top plate of the box body 10 and reducing the damage to other structures of the vehicle 1000 and the inside of the vehicle 1000.

[0095] In the embodiment, the battery monomer 20 provides a fixed base for the box body 10 to improve the carrying capacity of the box body 10. In the case of the box cover 11 as the floor of the vehicle 1000, the setting enables the box body 10 to better support the passengers and articles in the passenger compartment of the vehicle 1000. The first pressure relief structure 22 is arranged on the side opposite to the electrode terminal 21. In the case of the box cover 11 as the floor of the vehicle 1000, the setting can reduce the damage that the thermal runaway of the battery monomer 20 may cause to the passengers and articles in the passenger compartment of the vehicle 1000.

[0096] Referring to FIGS. 5-9, in some embodiments, the box body 10 further comprises a second cavity 131, and the box body 10 is provided with an avoidance hole 121 communicating the first cavity 101 and the second cavity 131, and the first pressure relief structure 22 is arranged opposite to the avoidance hole 121 in the first direction.

[0097] The second cavity 131 refers to a space in the box body 10 for accommodating high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer 20. The second cavity 131 can be a cuboid space, a cylindrical space or a space of other shapes. The shape of the second cavity 131 can also be set according to the shape of the box body 10. The second cavity 131 can be enclosed by part of the structural members of the box body 10, and the first cavity 101 and the second cavity 131 are separated by part of the structural members of the box body 10 to reduce the damage of the high-temperature and high-pressure flue gas in the second cavity 131 to the battery monomer 20.

[0098] The avoidance hole 121 refers to a structure in the box body 10 for communicating the first cavity 101 and the second cavity 131. The avoidance hole 121 can be arranged on the structural member separating the first cavity 101 and the second cavity 131. The avoidance hole 121 can be formed by opening a channel structure on the corresponding structural member, or by embedding a pipeline on the corresponding structural member. The avoidance hole 121 can extend along a straight line or curve along a virtual reference straight line. The cross-sectional shape of the avoidance hole 121 along its radial direction can be circular, square or other shapes.

[0099] The avoidance hole 121 is opposite to the first pressure relief structure 22 in the first direction, so that the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer 20 is discharged from the first pressure relief structure 22 to the avoidance hole 121, and then discharged to the second cavity 131 through the avoidance hole 121.

[0100] Since the avoidance hole 121 is opposite to the first pressure relief structure 22 in the first direction, and the first pressure relief structure 22 and the electrode terminal 21 are arranged along the first direction, the second cavity 131 and the first cavity 101 can also be arranged along the first direction.

[0101] The avoiding hole 121 can have one, two or more, and one avoiding hole 121 can be opposite to one first pressure relief structure 22 or two or more first pressure relief structures 22.

[0102] It can be understood that, in the case of the bottom structure 12 including a liquid cooling pipeline or other structure, the avoiding hole 121 can avoid the liquid cooling pipeline or other structure to reduce the interference and damage to the liquid cooling pipeline or other structure.

[0103] In the embodiment, the second cavity 131 and the avoiding hole 121 are arranged in the box body 10, and the first pressure relief structure 22 is opposite to the avoiding hole 121, so that the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer 20 can be discharged to the second cavity 131 through the first pressure relief structure 22, thereby reducing the high-temperature and high-pressure flue gas remaining in the first cavity 101 and improving the safety performance of the battery device 100, and reducing the risk of damage to other structures outside the box body 10 caused by the thermal runaway of the battery monomer 20; in the case of the box body 10 as the floor of the vehicle 1000, the setting also reduces the risk of damage to the passengers and articles in the passenger compartment of the vehicle 1000 caused by the thermal runaway of the battery monomer 20.

[0104] Referring to FIGS. 4-7, in some embodiments, the box body 10 further includes a frame structure 14, a box cover 11, a bottom structure 12 and a guard plate 13, the frame structure 14 is arranged through in the first direction, the box cover 11 closes one end of the frame structure 14 in the first direction, the bottom structure 12 closes the other end of the frame structure 14 in the first direction, the avoiding hole 121 is arranged on the bottom structure, and the box cover 11, the frame structure 14 and the bottom structure 12 form the first cavity 101; the guard plate 13 is arranged on the side of the bottom structure 12 away from the box cover 11 to form the second cavity 131 with the bottom structure 12.

[0105] The box cover 11 refers to part of the structure of the box body 10, and the box cover 11 can be a plate structure, a box structure or other structures; the box cover 11 can include a plate body or other structural members, and can further include a heat exchange structure (such as a cold plate) or other devices; the shape of the box cover 11 can be square, circular or other shapes.

[0106] The bottom structure 12 refers to part of the structure of the box body 10, and the bottom structure 12 is opposite to the box cover 11, and the bottom structure 12 can be used to bear the battery monomer 20 or other structures in the box body 10; the bottom structure 12 can be a plate structure, a box structure or other structures; the bottom structure 12 can include a plate body or other structural members, and can further include a heat exchange structure (such as a cold plate) or other devices; the shape of the bottom structure 12 can be square, circular or other shapes.

[0107] The frame structure 14 refers to the side structure in the box body 10, and the frame structure 14 can include a plurality of side beams connected in sequence to form a square or other shape frame structure; the frame structure 14 is provided through in the first direction, that is, the frame structure 14 has two openings in the first direction, and the opposite sides of the frame structure 14 in the first direction are connected to the box cover 11 and the bottom structure 12 respectively, that is, the box cover 11 and the bottom structure 12 respectively close the opposite ends of the frame structure 14 in the first direction, at this time, the box cover 11, the bottom structure 12 and the frame structure 14 form a first cavity 101 to accommodate the battery monomer 20.

[0108] Because the box cover 11 and the bottom structure 12 respectively close the opposite ends of the frame structure 14 in the first direction, the battery monomer 20 also provides support for the box body 10 in the first direction, that is, the two ends of the battery monomer 20 correspond to the box cover 11 and the bottom structure 12 respectively. For example, one end of the battery monomer 20 provided with the first pressure relief structure 22 is connected to the bottom structure 12, and the bottom structure 12 supports and provides support for the battery monomer 20; one end of the battery monomer 20 provided with the electrode terminal 21 is connected to the box cover 11 to provide support for the box cover 11, at this time, the box cover 11 can serve as the floor of the vehicle 1000.

[0109] It can be understood that the frame structure 14 can serve as part of the upper box body, at this time, the frame structure 14 and the box cover 11 can be regarded as the upper box body; the frame structure 14 can also serve as part of the lower box body, at this time, the frame structure 14 and the bottom structure 12 can be regarded as the lower box body.

[0110] The guard plate 13 refers to a structure in the box body 10 mainly used for providing external protection, and the guard plate 13 is arranged on the side of the bottom structure 12 away from the box cover 11, so that the guard plate 13 can protect the bottom structure 12; the guard plate 13 can cover only part of the bottom structure 12 to protect part of the bottom structure 12, or the guard plate 13 can completely cover the entire bottom structure 12, in addition to the bottom structure 12, the guard plate 13 can also be bent to the side of the box body 10 to cover part of the side structure of the box body 10 (for example, the frame structure 14), at this time, the guard plate 13 can also be used to protect part of the side of the box body 10.

[0111] The guard plate 13 can be a square plate, a circular plate or other shape structure; the guard plate 13 can be detachably connected to the bottom structure 12 by screwing, clamping or other means, or the guard plate 13 can be fixedly connected to the bottom structure 12 by welding, bonding or other means; the material of the guard plate 13 can include metal, plastic or other materials.

[0112] In the case that the box cover 11 is used as the floor of the vehicle 1000, the bottom structure 12 faces the ground, and the bottom structure 12 is easily damaged by flying gravel, road bumps, and the like during the travel of the vehicle 1000; therefore, the guard plate 13 is arranged on the side of the bottom structure 12 away from the box cover 11 to protect the bottom structure 12 by the guard plate 13.

[0113] The second cavity 131 refers to the space formed between the bottom structure 12 and the guard plate 13, and the bottom structure 12 can separate the first cavity 101 and the second cavity 131; the second cavity 131 can be a complete space, or can be divided into multiple pipeline-shaped spaces by structural members.

[0114] The avoidance hole 121 is arranged on the bottom structure 12, and in the case that the battery monomer 20 in the first cavity 101 is in thermal runaway, the high-temperature and high-pressure flue gas generated by the battery monomer 20 can be discharged to the second cavity 131 through the avoidance hole 121, so as to reduce the high-temperature and high-pressure flue gas in the first cavity 101 and reduce the negative impact of the high-temperature and high-pressure flue gas on the battery monomer 20.

[0115] The embodiment provides specific structures of the bottom structure 12, and the first cavity 101 and the second cavity 131 are formed by the bottom structure 12 and the guard plate 13 to be separated from each other, so as to reduce the negative impact of the high-temperature and high-pressure flue gas discharged into the second cavity 131 on the battery monomer 20.

[0116] In some embodiments, the bottom structure 12 includes a plate structure; the bottom structure 12 is made of a metal material by a casting forming process, or the bottom structure 12 includes a profile.

[0117] The bottom structure 12 can include a plate structure, and the bottom structure 12 can be a planar plate structure or a bent plate structure; the plate structure can be square, circular, or other shapes, and the shape of the plate structure can be set according to the shape of the box body 10; the plate structure can be fixedly connected to the frame structure 14 by welding, bonding, or other means, or can be detachably connected to the frame structure 14 by screwing, riveting, or other means.

[0118] The bottom structure 12 can be made of a metal material by a casting forming process, and the casting forming process is a processing technology of pouring and forming a molten metal material or a non-metal material; the bottom structure 12 is processed by the casting forming process of the metal material, so as to improve the strength of the bottom structure 12 by adjusting the processing technology.

[0119] The bottom structure 12 can also include a profile, which refers to a structure formed by plastic processing of metal and having a certain cross-sectional shape and size. The cross-section of the profile can be a solid structure or have a cavity structure. The bottom plate can include one profile or multiple profiles. According to the shape of the cross-section of the profile, the bottom structure 12 generally has good strength and energy absorption performance to provide support for the battery monomer 20.

[0120] When the bottom structure 12 is made of metal material by casting process or is a profile, the material of the bottom structure 12 can include iron, iron-carbon alloy, aluminum or other metal materials.

[0121] In addition to the plate structure, the bottom structure 12 can also include other structures, such as a liquid cooling structure.

[0122] The embodiment provides specific structures of the bottom structure 12, so that the bottom structure 12 is made of metal material by casting process or is a profile, so that the bottom structure 12 can have high strength and can better and more stably provide support for the battery monomer 20.

[0123] Referring to FIG. 7, in some embodiments, the bottom structure 12 includes a heat exchange assembly.

[0124] The heat exchange assembly refers to a structure in the battery device 100 for controlling the temperature of the first cavity 101 and the battery monomer 20. The heat exchange assembly can include a liquid cooling structure, an air cooling structure or other structures for controlling the temperature. The bottom structure 12 can only include the heat exchange assembly, in which case the heat exchange assembly is used to control the temperature of the first cavity 101 and the battery monomer 20, and also to carry the battery monomer 20 or other structures. The bottom structure 12 can only include the heat exchange assembly, and the bottom structure 12 can also include other structures.

[0125] The heat exchange assembly can be directly connected to the frame structure 14 or indirectly connected to the frame structure 14 through an intermediate structure.

[0126] When the bottom structure 12 includes the heat exchange assembly, the avoidance hole 121 can pass through the heat exchange assembly. The avoidance hole 121 can be formed in a pipeline embedded in the heat exchange assembly, or a passage structure can be formed on a structural member in the heat exchange assembly to form the avoidance hole 121. The avoidance hole 121 can avoid the liquid cooling pipeline or other structures to reduce interference and damage to the liquid cooling pipeline or other structures.

[0127] In the case of thermal runaway of the battery monomer 20, the high-temperature and high-pressure flue gas generated by the thermal runaway can be discharged into the avoidance hole 121. Since the avoidance hole 121 penetrates the heat exchange assembly, the high-temperature and high-pressure flue gas discharged into the avoidance hole 121 can be timely heat exchanged with the heat exchange assembly and be treated and cooled by the heat exchange assembly, thereby reducing the damage that the high-temperature and high-pressure flue gas can cause to other structures of the battery device 100 or other structures outside, and improving the safety performance of the battery device 100.

[0128] The embodiment provides another specific structure of the bottom structure 12, that is, the bottom structure 12 comprises the heat exchange assembly, so that the heat exchange assembly can not only control the temperature of the battery device 100 in the normal use process of the battery device 100, but also reduce the overall temperature of the battery device 100 in the case of thermal runaway of the battery monomer 20; the avoidance hole 121 is arranged on one side of the heat exchange assembly or in the heat exchange assembly, so that the heat exchange assembly can also be used to reduce the temperature of the high-temperature and high-pressure flue gas, thereby better reducing the risk of damage to the occupants and articles in the passenger compartment of the vehicle 1000 caused by the thermal runaway of the battery monomer 20.

[0129] Referring to FIGS. 6 and 7, in some embodiments, the second pressure relief structure 15 is arranged on the box body 10, and the second pressure relief structure 15 is used to communicate the first cavity 101 with a space outside the box body 10; the second cavity 131 is in communication with the first cavity 101 at a position close to the second pressure relief structure 15, so as to discharge the substances in the second cavity 131 to the space outside the box body 10 through the second pressure relief structure 15.

[0130] The second pressure relief structure 15 refers to a structure in the battery device 100 for relieving the internal pressure when the internal pressure or temperature of the first cavity 101 reaches a threshold value. The second pressure relief structure 15 can be a pressure relief valve or other pressure relief structure. Therefore, one end of the second pressure relief structure 15 faces the first cavity 101, and the other end of the second pressure relief structure 15 can face the space outside the box body 10, so that the second pressure relief structure 15 can discharge the air in the first cavity 101 to the space outside the box body 10 when the pressure or temperature in the first cavity 101 reaches the threshold value. The second pressure relief structure 15 is arranged on the box body 10. The second pressure relief structure 15 can be arranged on the box cover 11, or on the bottom structure 12, or on the frame structure 14 or other structural members. The second pressure relief structure 15 can be completely accommodated in the first cavity 101, or completely located outside the box body 10 and connected to the surface of the box body 10 facing the outside, or partially located in the first cavity 101 and partially penetrating the box body 10 and extending to the outside.

[0131] The substance discharged from the second cavity 131 to the outside of the box body 10 through the second pressure relief structure 15 can include gas, liquid, solid or mixture, and mainly includes the substance generated by thermal runaway of the battery cell 20, and can include high-temperature and high-pressure gas, debris of part of the internal structure of the battery cell 20, electrolyte or other substances.

[0132] The second cavity 131 is in communication with the first cavity 101 at a position close to the second pressure relief structure 15, so that the substance in the second cavity 131 can be moved to the vicinity of the second pressure relief structure 15 and be discharged to the space outside the box body 10 through the second pressure relief structure 15; the second cavity 131 can be in communication with the first cavity 101 through a pipeline structure or other structure.

[0133] For example, in the case where the second cavity 131 is formed between the bottom structure 12 and the guard plate 13, a through hole can be formed on the side of the bottom structure 12 close to the second pressure relief structure 15, so that the second cavity 131 can be in communication with the first cavity 101.

[0134] For example, the second pressure relief structure 15 can be arranged on the frame structure 14 of the box body 10, at this time, a through hole can be arranged on the side of the bottom structure 12 close to the frame structure 14 and close to the second pressure relief structure 15, so that the second cavity 131 can be in communication with the first cavity 101; a beam body (such as an expansion beam, etc.) can be arranged in the box body 10, so as to separate the through hole from the battery cell 20 through the beam body, so as to reduce the possible negative effects of the high-temperature and high-pressure flue gas discharged from the second cavity 131 on the battery cell 20.

[0135] It can be understood that a pipeline can also be arranged, one end of the pipeline is in communication with the second cavity 131, and the other end of the pipeline faces the second pressure relief structure 15, so as to reduce the possible negative effects of the high-temperature and high-pressure flue gas discharged from the second cavity 131 on the battery cell 20.

[0136] In the embodiment, the second pressure relief structure 15 is arranged, so that the high-temperature and high-pressure flue gas in the second cavity 131 can be discharged to the outside of the box body 10 through the second pressure relief structure 15; at the same time, the high-temperature and high-pressure flue gas in the box body 10 can also be directly discharged to the outside of the box body 10 through the second pressure relief structure 15, so as to reduce the high-temperature and high-pressure flue gas remaining in the box body 10.

[0137] Referring to FIGS. 7 and 8, in some embodiments, the battery device 100 further comprises a first support 30, which is located between the end of the shell 23 provided with the electrode terminal 21 and the box body 10 in the first direction, one side of the first support 30 is connected to the shell 23, and the other side of the first support 30 is connected to the box body 10.

[0138] The first support 30 refers to a structure in the battery device 100 for being arranged between the battery monomer 20 and the box body 10, and the first support 30 is used for providing support for the corresponding side wall of the box body 10; the first support 30 can include a solid columnar structure, or a hollow frame structure or other structures; the number of the first support 30 can be one, or two or more; one first support 30 can be connected to only one battery monomer 20, that is, the first support 30 and the battery monomer 20 are one-to-one corresponding; one first support 30 can also be connected to multiple battery monomers 20 at the same time; the material of the first support 30 can include metal, plastic or other materials.

[0139] The first support 30 is arranged between the one end of the shell 23 having the electrode terminal 21 and the corresponding side wall of the box body 10, so that the shell 23 can provide support for the box body 10 through the first support 30, and at the same time, the direct contact of the shell 23, the electrode terminal 21 and the box body 10 can be reduced, thereby reducing the damage that the battery monomer 20 can suffer.

[0140] In the case that the box cover 11 is supported by the one end of the shell 23 having the electrode terminal 21, the first support 30 is located between the box body 10 and the shell 23.

[0141] One side of the first support 30 is connected to the shell 23, and the side of the first support 30 connected to the shell 23 can be connected to the end cover 232 of the battery monomer 20, or to the electrode terminal 21 of the battery monomer 20, or to the connecting structure (such as a busbar) between the adjacent two battery monomers 20; on the surface of the shell 23 in contact with the first support 30, the first support 30 can only cover part of the surface, or can completely cover the surface.

[0142] The side of the first support 30 connected to the battery monomer 20 can be detachably connected to the shell 23 through screwing, clamping or other means, or can be fixedly connected to the shell 23 through welding, bonding or other means; for example, the first support 30 is fixedly connected to the shell 23 through gluing.

[0143] The first support 30 can also be connected only with the battery monomer 20, and be pressed on the shell 23 through the pressure of the box body 10, so as to fix the first support 30 in the box body 10.

[0144] The other side of the first support 30 is connected to the box body 10, and the side of the first support 30 connected to the box body 10 can be fixedly connected to the box body 10 through welding, bonding or other means, or can be detachably connected to the box body 10 through screwing, clamping or other means.

[0145] The first support 30 can also prevent the electrode terminal 21 and the connection structure (such as a tab, etc.) between adjacent battery cells 20 from directly contacting the box 10, thereby reducing the friction and collision between the box 10 and the electrode terminal 21 or other structures of the battery cell 20, and protecting the battery cell 20, reducing damage to the battery cell 20, and prolonging the service life of the battery device 100.

[0146] In the case where the box cover 11 is supported at one end of the shell 23 by the electrode terminal 21, the battery cell 20 can support the box cover 11 by the first support 30, and in the case where the box cover 11 is pressed, part of the pressure borne by the box cover 11 can be transmitted to the battery cell 20 through the first support 30; since the battery cells 20 are usually closely arranged inside the box 10, and the edge portion of the box cover 11 is usually supported by the frame structure 14 or other structures, at this time, each battery cell 20 can support each position of the box cover 11 by the first support 30, thereby improving the overall strength of the box cover 11 and the support performance of the middle portion of the box cover 11.

[0147] It can be understood that another part of the pressure borne by the box cover 11 can be directly transmitted to the connected frame structure 14 and / or bottom structure 12.

[0148] In the present embodiment, the first support 30 is arranged between the battery cell 20 and the box 10 to support the box 10 by the first support 30; at the same time, the battery cell 20 is not easy to directly contact the box 10, thereby reducing the damage that the expansion and friction between the box 10 and the battery cell 20 can cause to the battery cell 20.

[0149] Referring to FIGS. 7 and 8, in some embodiments, the first support 30 includes a first support portion 31 and a first extension portion 32 connected to the first support portion 31, the first support portion 31 is connected to the shell 23 and arranged away from the electrode terminal 21; the first extension portion 32 is arranged on the side of the first support portion 31 away from the battery cell 20, the first extension portion 32 is connected to the box 10, and the first extension portion 32 is arranged opposite and spaced apart from the electrode terminal 21.

[0150] The first support portion 31 refers to the portion of the first support 30 connected to the shell 23, and the first support portion 31 can be a solid columnar structure, a hollow frame structure, or other structures; one first support 30 can have only one first support portion 31, or two or more first support portions 31, one first support portion 31 can be connected to only one battery cell 20, i.e., the first support portion 31 and the battery cell 20 are one-to-one corresponding, or can be connected to multiple battery cells 20 at the same time; the material of the first support portion 31 can include metal, plastic, or other materials.

[0151] The first support part 31 can be connected to the end cover 232 of the shell 23, to the electrode terminal 21 of the battery monomer 20, or to the connecting structure (e.g., a busbar) between two adjacent battery monomers 20. The first support part 31 can cover only part of the surface of the shell 23, or can cover the entire surface.

[0152] The first support part 31 can be detachably connected to the shell 23 by screwing, clamping, or other means, or can be fixedly connected to the shell 23 by welding, bonding, or other means. The first support part 31 can be connected to the shell 23 only by contact. For example, the first support part 31 is fixedly connected to the shell 23 by bonding.

[0153] The first extension part 32 refers to the part of the first support part 30 that is connected to the box 10. The first extension part 32 can be a solid plate structure, a hollow plate structure, or other structures. One first extension part 32 can be connected to one or more first support parts 31, and one first support part 31 can be connected to one or more first extension parts 32. The first extension part 32 can be integrally formed with the first support part 31, or can be fixedly connected to the first support part 31 by welding, bonding, or other means. The first extension part 32 can be detachably connected to the first support part 31 by screwing, clamping, or other means. The material of the first extension part 32 can include metal, plastic, or other materials. The material of the first extension part 32 can be the same as or different from that of the first support part 31.

[0154] The first extension part 32 can extend away from the first support part 31 in the vertical first direction to make the projection area of the first extension part 32 on the corresponding side of the box 10 larger than that of the first support part 31. This allows the first extension part 32 to cover a larger area of the box 10, so that the first support part 30 can better support the box 10. The projection area of the first extension part 32 on the corresponding side of the box 10 can also be similar to that of the first support part 31.

[0155] The first extension part 32 is arranged opposite to the electrode terminal 21 and is spaced apart from the electrode terminal 21. In the case where the first direction is the height direction Z of the battery device 100, the first extension part 32 is located above the electrode terminal 21, and a gap exists between the first extension part 32 and the electrode terminal 21. At this time, the first extension part 32 is also arranged spaced apart from the connecting structure (for example, a tab or the like) of the adjacent battery monomer 20. This arrangement can reduce the friction and collision damage of the first extension part 32 to the electrode terminal 21 and the connecting structure of the adjacent battery monomer 20, thereby reducing the interference of the first extension part 32 to the input of electric energy to the battery monomer 20 and reducing the interference of the first extension part 32 to the transmission of electric energy. At the same time, the gap can also serve as an electrical gap between the electrode terminal 21, the connecting structure of the adjacent battery monomer 20, and the first extension part 32, so as to reduce the interference of the first extension part 32 to the electrode terminal 21 and the connecting structure of the adjacent battery monomer 20, and to reduce the risk of discharge and improve the safety performance of the battery device 100.

[0156] For example, in the case where the housing 23 is provided with the end cover 11 to support one end of the electrode terminal 21, in the case where the projection area of the first extension part 32 on the end cover 11 is greater than the projection area of the first support part 31 on the end cover 11, due to the gap between the first extension part 32 and the electrode terminal 21, part of the first extension part 32 extends beyond the first support part 31 and is in a suspended state. At this time, part of the pressure of the end cover 11 is transmitted to the first support part 31 through the first extension part 32, and is transmitted to the housing 23 through the first support part 31. Due to the gap between the first extension part 32 and the electrode terminal 21, the first extension part 32 is not easy to contact or collide with the electrode terminal 21, thereby reducing the possible damage to the electrode terminal 21.

[0157] In this embodiment, the first support part 31 provides support for the first extension part 32, so that the first extension part 32 can provide support for the box body 10. The first extension part 32 is arranged spaced apart from the electrode terminal 21, so that the first extension part 32 is difficult to contact the electrode terminal 21, thereby reducing the risk of the first extension part 32 rubbing or colliding with the electrode terminal 21 and reducing the possible damage to the electrode terminal 21.

[0158] Referring to FIGS. 3, 7, and 8, in some embodiments, the housing 23 includes a housing main body 231 and an end cover 232 connected to the housing main body 231. The end cover 232 is arranged on one side of the housing main body 231 along the first direction. The electrode terminal 21 is arranged on the end cover 232. The first pressure relief structure 22 is arranged on the side of the housing main body 231 opposite to the end cover 232. The first support part 31 abuts against the end cover 232. The first extension part 32 is arranged spaced apart from the end cover 232.

[0159] The end cover 232 refers to a component that covers the opening of the shell body 231 to isolate the internal environment of the battery monomer 20 from the external environment; the shell body 231 is an assembly for cooperating with the end cover 232 to form the internal environment of the battery monomer 20.

[0160] The end cover 232 is arranged on one side of the shell body 231 in the first direction, and the electrode terminal 21 is arranged on the end cover 232. In the case where the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the battery monomer 20 is placed in the box 10 in the positive direction; the first pressure relief structure 22 is arranged on the side of the shell body 231 opposite to the end cover 232. In the case where the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the first pressure relief structure 22 is located on the side of the shell body 231 facing the bottom structure 12, so that the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer 20 can be discharged towards the bottom structure 12, thereby reducing the negative impact of the thermal runaway of the battery monomer 20 on the box cover 11, and also reducing the damage to the electrode terminal 21 and other structures caused by the high-temperature and high-pressure flue gas generated by the thermal runaway; in the case where the box cover 11 is the floor of the vehicle 1000, this arrangement can also reduce the negative impact of the thermal runaway of the battery monomer 20 on the passenger compartment.

[0161] Since the end cover 232 is located on the side of the shell body 231 facing the box 10, and the first support 30 is located between the box 10 and the battery monomer 20 in the first direction, the first support part 31 of the first support 30 is connected to the end cover 232; the first support part 31 can only cover part of the end cover 232, or can cover the entire end cover 232.

[0162] Since the electrode terminal 21 is located on the end cover 232, the first extension 32 is also spaced apart from the end cover 232, so that the first extension 32 is difficult to directly contact the electrode terminal 21, thereby reducing the friction and collision damage that the first extension 32 can cause to the electrode terminal 21; the projection of the first extension 32 on the end cover 232 can only cover part of the end cover 232, or can cover the entire end cover 232.

[0163] The present embodiment provides some specific structures of the battery monomer 20, so that the first support part 31 abuts against the end cover 232, so that the battery monomer 20 can provide support for the first support part 31 through the shell body 231 and the end cover 232; the first extension 32 is spaced apart from the end cover 232 to reduce the risk of the first extension 32 rubbing or colliding with the electrode terminal 21, and to reduce the damage that the electrode terminal 21 can suffer.

[0164] Referring to FIGS. 7 and 8, in some embodiments, in the first direction, the projection of the first support part 31 on the end cover 232 is staggered with the projection of the electrode terminal 21 on the end cover 232.

[0165] In the case where the battery cell 20, the first support 30, and the corresponding side wall of the box body 10 are arranged in sequence along the first direction, the projection of the first support portion 31 on the end cover 232 refers to the area of the end cover 232 covered by the connecting position of the first support portion 31 and the end cover 232, and the projection of the electrode terminal 21 on the end cover 232 refers to the area of the end cover 232 covered by the electrode terminal 21.

[0166] The projection of the first support portion 31 on the end cover 232 is staggered with the projection of the electrode terminal 21 on the end cover 232, that is, the first support portion 31 and the electrode terminal 21 are arranged staggered and do not interfere with each other, so that the first support portion 31 is difficult to rub or collide with the electrode terminal 21, thereby reducing the damage that the first support portion 31 may cause to the electrode terminal 21, and at the same time, the arrangement can also make the force on the first support portion 31 not easily transmitted directly to the electrode terminal 21, thereby reducing the force borne by the electrode terminal 21, and thus reducing the damage that the electrode terminal 21 may suffer.

[0167] In the embodiment, the first support portion 31 and the electrode terminal 21 are arranged staggered to reduce the rubbing and collision damage that the first support portion 31 may cause to the electrode terminal 21, thereby reducing the risk of damage to the electrode terminal 21 and improving the stability of the battery device 100.

[0168] Referring to FIGS. 7 and 8, in some embodiments, in the first direction, the projection of the first support portion 31 on the corresponding side wall of the box body 10 at least partially overlaps with the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10.

[0169] In the case where the battery cell 20, the first support 30, and the corresponding side wall of the box body 10 are arranged in sequence along the first direction, the projection of the first support portion 31 on the corresponding side wall of the box body 10 refers to the area of the corresponding side wall of the box body 10 covered by the first support portion 31 in the first direction, and the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10 refers to the area of the corresponding side wall of the box body 10 covered by the side wall of the shell body 231 in the first direction.

[0170] For example, in the case where the first direction is the height direction Z of the battery device 100 and the electrode terminal 21 faces the box cover 11, the projection of the first support portion 31 on the corresponding side wall of the box body 10 refers to the area of the box cover 11 covered by the first support portion 31 in the height direction Z, and the projection of the side wall of the shell body 231 on the corresponding side wall of the box body 10 refers to the area of the box cover 11 covered by the side wall of the shell body 231 in the height direction Z.

[0171] The first support part 31 is at least partially opposite to the side wall of the shell main body 231, and in the case that the corresponding side wall of the box 10 bears pressure, part of the pressure can be transmitted to the first support part 31 through the first extension part 32, and then transmitted to the side wall of the shell main body 231 through the first support part 31, and then transmitted to other parts of the battery monomer 20 and other positions of the box 10 through the side wall of the shell main body 231. At this time, the first support 30, the battery monomer 20, other positions of the box 10 or other structures in the battery device 100 can share part of the pressure borne by the corresponding side wall of the box 10, thereby improving the bearing capacity and support performance of the box 10, and also improving the stability of the whole battery device 100.

[0172] It can be understood that the first support part 31 can be made to have a larger overlapping area with the side wall of the shell main body 231, so that the force on the first support part 31 can be better transmitted to the side wall of the shell main body 231, and the local stress concentration can be reduced, thereby reducing the damage to the first support part 31 and the shell main body 231.

[0173] In the embodiment, at least part of the first support part 31 in the height direction of the battery device 100 can be opposite to the shell main body 231, so that the first support part 31 can transmit part of the force it bears to the shell main body 231, thereby enabling the shell main body 231 to better support the first support part 31, and further improving the strength of the box 10.

[0174] In some embodiments, the first support 30 is a hard and insulating structural member.

[0175] The first support 30 is a hard structural member, so that the first support 30 can better support the corresponding side wall of the box 10, and part of the pressure borne by the corresponding side wall of the box 10 can be directly transmitted to the first support 30 and then transmitted to the battery monomer 20 and the bottom structure 12. The hard first support 30 can bear more force during force transmission, thereby better sharing the pressure borne by the corresponding side wall of the box 10 and improving the support performance of the corresponding side wall of the box 10.

[0176] The first support 30 is also an insulating structural member. Since the first support 30 is located near the electrode terminal 21, and the connection structure (such as a tab) between the electrode terminal 21 and the adjacent battery monomer 20 carries electric energy, this arrangement can reduce the interference of the first support 30 with the electrode terminal 21 and the connection structure of the adjacent battery monomer 20, and also reduce the risk of discharge and improve the safety performance of the battery device 100.

[0177] The material of the first support 30 can include metal, plastic or other materials.

[0178] For example, the material of the first support 30 can include phenolic plastic, which has excellent insulation performance and mechanical strength, and can provide better support performance for the corresponding side wall of the box 10, and can improve the safety performance and stability of the battery device 100.

[0179] For example, the material of the first support 30 can also include a composite material of polyvinyl chloride (PVC) and epoxidized natural rubber (ENR), which has high toughness and mechanical strength, and also has excellent insulation performance, which can provide better support performance for the corresponding side wall of the box 10, and can improve the safety performance and stability of the battery device 100.

[0180] For example, the material of the first support 30 can also include alumina ceramic, which has good insulation performance, high mechanical strength and good wear resistance, and can provide better support performance for the corresponding side wall of the box 10, and can improve the safety performance and stability of the battery device 100, and also has a long service life.

[0181] It can be understood that the material of the first support 30 can also include other hard insulating materials, and is not limited to phenolic plastic, a composite material of polyvinyl chloride (PVC) and epoxidized natural rubber (ENR), and alumina ceramic.

[0182] In the embodiment, the first support 30 is a hard structure, so that the first support 30 can better support the box 10.

[0183] Referring to FIGS. 7 and 8, in some embodiments, the battery device 100 further includes a second support 40, one side of the second support 40 being connected to the first extension 32 and / or the box 10, and at least part of the other side of the second support 40 being connected to the electrode terminal 21.

[0184] The second support 40 refers to a structure in the battery device 100 arranged between the battery monomer 20 and the first extension 32, and the corresponding side wall of the box body 10. The second support 40 is used to provide support for the first extension 32. In the case that the first extension 32 is partially extended outward from the first support 31 and suspended, the second support 40 can provide support for the suspended part of the first extension 32, so that the first extension 32 can better support the corresponding side wall of the box body 10 under the support of the second support 40. The second support 40 can also be connected to the corresponding side wall of the box body 10 at a position not covered by the first extension 32 to provide support for the corresponding side wall of the box body 10. The second support 40 can include a solid columnar structure, a hollow frame structure or other structures. The number of second supports 40 can be one, two or more. One second support 40 can be connected to only one battery monomer 20, i.e., one-to-one correspondence between the second support 40 and the battery monomer 20. One second support 40 can also be connected to multiple battery monomers 20 at the same time. The material of the second support 40 can include metal, plastic or other materials.

[0185] One side of the second support 40 is connected to the first extension 32 and / or the corresponding side wall of the box body 10. The side of the second support 40 connected to the first extension 32 can be fixedly connected to the first extension 32 and / or the corresponding side wall of the box body 10 by welding, bonding or other means. It can also be detachably connected to the first extension 32 and / or the corresponding side wall of the box body 10 by screwing, clamping or other means.

[0186] At least part of the other side of the second support 40 is connected to the electrode terminal 21, i.e., part of the other side of the second support 40 can be connected to the electrode terminal 21 of the battery monomer 20, or to the connecting structure (such as the busbar) between the adjacent two battery monomers 20, or to the end cover 232 of the battery monomer 20.

[0187] The side of the second support 40 connected to the electrode terminal 21 can be detachably connected to the electrode terminal 21 or the end cover 232 by screwing, clamping or other means. It can also be fixedly connected to the electrode terminal 21 or the end cover 232 by welding, bonding or other means.

[0188] The second support 40 can also be connected only in contact with the electrode terminal 21 or the end cover 232, and be pressed on the electrode terminal 21 or the end cover 232 by the pressure of the first extension 32 to fix the second support 40 in the box body 10.

[0189] The second support 40 can fill the gap between the first extension 32 and the end cover 232, the electrode terminal 21 and other structures, so that the battery monomer 20 can be better supported by the second support 40 and the first support 30 for the corresponding side wall of the box 10, thereby better improving the support performance of the box 10.

[0190] The arrangement of the second support 40 can also make it difficult for the electrode terminal 21 and the connecting structure (such as a tab) between adjacent battery monomers 20 to directly contact the first extension 32, thereby reducing friction and collision of the first extension 32 with the electrode terminal 21 or other structures of the battery monomer 20, and thus protecting the battery monomer 20, reducing damage to the battery monomer 20, and improving the service life of the battery device 100.

[0191] In the embodiment, the second support 40 is arranged between the first extension 32 and the end cover 232, and the first extension 32 is supported by the second support 40, so that the first support 30 can better support the corresponding side wall of the box 10, thereby better improving the strength of the box 10.

[0192] Referring to FIGS. 7 and 8, in some embodiments, the second support 40 includes a second support portion 41 and a second extension 42 connected to the second support portion 41. One side of the second support portion 41 is connected to the first extension 32 and / or the box 10, and the other side of the second support portion 41 is connected to the shell 23 and arranged offset from the electrode terminal 21. One side of the second extension 42 is connected to the first extension 32 and / or the box 10, and the other side of the second extension 42 is opposite to and connected to the electrode terminal 21.

[0193] The second support portion 41 refers to the part of the second support 40 connected to the shell 23. The second support portion 41 can be a solid columnar structure, a hollow frame structure or other structures. One second support 40 can have only one second support portion 41, or two or more second support portions 41. One second support portion 41 can be connected to only one battery monomer 20, i.e., the second support portion 41 and the battery monomer 20 are one-to-one corresponding, or can be connected to multiple battery monomers 20 at the same time. The material of the second support portion 41 can include metal, plastic or other materials.

[0194] The one side of the second support part 41 is connected to the shell 23 and is arranged staggered with the electrode terminal 21 to reduce the friction and collision damage that the second support part 41 may cause to the electrode terminal 21, at this time, the second support part 41 can be connected to the end cover 232; the second support part 41 can be detachably connected to the end cover 232 by screwing, clamping or other means, or can be fixedly connected to the end cover 232 by welding, bonding or other means, the second support part 41 can also only contact the end cover 232 and be pressed on the end cover 232 by the pressure of the first extension part 32, so as to realize the fixation of the second support part 41.

[0195] The other side of the second support part 41 can be connected to the first extension part 32 to provide support for the overhanging part of the first extension part 32, so that the first extension part 32 can better support the box body 10; the other side of the second support part 41 can also be connected to the corresponding side wall of the box body 10 at the position not covered by the first extension part 32 to provide support for the box body 10.

[0196] The second extension part 42 refers to the part structure of the second support part 40 opposite and connected to the connecting structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery monomer 20, in the case that the electrode terminal 21 of the battery monomer 20 faces the box cover 11 in the first direction which is the height direction Z of the battery device 100, the second extension part 42 is located above the connecting structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery monomer 20; the second extension part 42 can be a solid plate structure, or a hollow plate structure or other structure; one second extension part 42 can be connected to one or more second support parts 41, and one second support part 41 can also be connected to one or more second extension parts 42; the second extension part 42 can be integrally formed with the second support part 41, or can be fixedly connected to the second support part 41 by welding, bonding or other means, or can be detachably connected to the second support part 41 by screwing, clamping or other means; the material of the second extension part 42 can include metal, plastic or other materials, and the material of the second extension part 42 can be the same as or different from that of the second support part 41.

[0197] The second extension part 42 can extend in the direction away from the second support part 41 in the plane perpendicular to the first direction to fill the space between the first extension part 32 and the electrode terminal 21, and fill the space between the first extension part 32 and the connecting structure (such as a tab, etc.) of the adjacent battery monomer 20, so that the second extension part 42 can provide support for the overhanging part of the first extension part 32.

[0198] The second extending part 42 can be connected to the electrode terminal 21 by welding, bonding or other means, or can only contact the electrode terminal 21 and be pressed against the electrode terminal 21 by the pressure of the first extending part 32, so as to fix the second extending part 42.

[0199] The second extending part 42 is connected to the first extending part 32 on one side and connected to the electrode terminal 21 and the connecting structure (such as a busbar or the like) between the adjacent battery monomers 20 on the other side, so as to provide support for the overhanging part of the first extending part 32, so that the first extending part 32 can better support the corresponding side wall of the box body 10; at the same time, the second extending part 42 can also make the electrode terminal 21 difficult to directly contact the first extending part 32, so as to play a protective role for the electrode terminal 21; one side of the second extending part 42 can also be connected to the corresponding side wall of the box body 10 at a position not covered by the first extending part 32, so as to fill the space between the corresponding side wall of the box body 10 and the end cover 232 and directly support the corresponding side wall of the box body 10.

[0200] In the embodiment, the second support part 40 includes the second support part 41 and the second extending part 42, the first extending part 32 provides support through the second support part 41, so as to improve the support performance of the first extending part 32 for the corresponding side wall of the box body 10; the second extending part 42 fills the space between the first extending part 32 and the electrode terminal 21, so as to reduce the gap between the corresponding side wall of the box body 10 and the battery monomer 20 and further improve the strength of the box body 10.

[0201] In some embodiments, at least part of the second support part 40 is a hard insulating structure or a flexible insulating structure.

[0202] The second support part 40 is an insulating structure, and the second support part 40 is located near the electrode terminal 21, and the connecting structure (such as a busbar or the like) between the electrode terminal 21 and the adjacent battery monomer 20 carries electric energy, so that the arrangement can reduce the interference of the second support part 40 on the electrode terminal 21 and the connecting structure of the adjacent battery monomer 20, and can reduce the risk of discharge and improve the safety performance of the battery device 100.

[0203] The second support 40 can be a rigid structure to better support the first extension 32, so that the second support 40 can better share the pressure on the corresponding side wall of the box 10 and improve the support performance of the corresponding side wall of the box 10; the second support 40 can also be a flexible structure, so that the second support 40 can fill the space between the first extension 32 and the end cover 232 to provide certain support for the extension, and the second support 40 can also protect the connecting structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery monomer 20, reduce the friction and collision damage it may suffer, and improve the stability of the battery device 100.

[0204] The second support 40 can be only partially rigid and insulated, and the other part can be flexible and insulated; the entire second support 40 can also be rigid and insulated or flexible and insulated.

[0205] The material of the second support 40 can include metal, plastic or other materials. For example, the material of the second support 40 can include phenolic plastic, which has excellent insulation performance and mechanical strength, can provide better support performance for the corresponding side wall of the box 10, and can improve the safety performance and stability of the battery device 100. For example, the material of the second support 40 can also include insulating foam, such as polyethylene foam, polyurethane foam, etc. The insulating foam has good insulation performance and high elasticity, can deform and absorb part of the force during the transmission of the force from the first extension 32 to the second support 40, thereby reducing the force on the connecting structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery monomer 20, and protecting the connecting structure (such as a tab, etc.) between the electrode terminal 21 and the adjacent battery monomer 20. It can be understood that the material of the second support 40 can also include other rigid or flexible insulating materials, not limited to the above two.

[0206] The present embodiment provides some structures of the second support 40 to better support the box 10 or to reduce the risk of damage to the electrode terminal 21.

[0207] Referring to FIGS. 7 and 8, in some embodiments, the hardness of the second support 40 is less than or equal to the hardness of the first support 30.

[0208] The hardness of the second support 40 can be less than the hardness of the first support 30, and the hardness of the second support 40 can also be equal to the hardness of the first support 30.

[0209] Since the second support 40 directly contacts the electrode terminal 21 and the connecting structure (for example, a tab, etc.) between the adjacent battery cells 20, the hardness of the second support 40 is less than or equal to the hardness of the first support 30, so as to reduce the damage of the second support 40 to the electrode terminal 21 and the connecting structure (for example, a tab, etc.) between the adjacent battery cells 20, and the second support 40 can also provide certain support performance.

[0210] In the embodiment, since the second support 40 contacts the electrode terminal 21, the hardness of the second support 40 is less than or equal to the hardness of the first support 30, which can reduce the risk of damage of the second support 40 to the electrode terminal 21.

[0211] In some embodiments, the tensile modulus of the first support 30 is greater than or equal to 30 Gpa (gigapascal), and / or the tensile modulus of the second support 40 is greater than or equal to 30 Gpa.

[0212] The tensile modulus of the first support 30 is greater than or equal to 30 Gpa, that is, the tensile modulus of the first support 30 can be 30 Gpa, or 40 Gpa, 50 Gpa, 360 Gpa, 70 Gpa, 100 Gpa or other parameters.

[0213] The tensile modulus of the second support 40 is greater than or equal to 30 Gpa, that is, the tensile modulus of the second support 40 can be 30 Gpa, or 40 Gpa, 50 Gpa, 360 Gpa, 70 Gpa, 100 Gpa or other parameters.

[0214] For example, the tensile modulus of the first support 30 and the second support 40 can both be 50 Gpa, so that the first support 30 and the second support 40 have high strength.

[0215] The tensile modulus of the first support 30 and the second support 40 reflects the strength of the first support 30 and the second support 40, and the greater the value of the tensile modulus, the higher the strength of the first support 30 and the second support 40, and the better the support performance of the box 10.

[0216] Since the first support 30 and the second support 40 can both provide support for the box 10, the tensile modulus of only one of the first support 30 or the second support 40 can be greater than or equal to 30 Gpa, or the tensile modulus of the first support 30 and the second support 40 can both be greater than 30 Gpa.

[0217] In the case where the hardness of the second support 40 is less than or equal to the hardness of the first support 30, the tensile modulus of the first support 30 and the second support 40 can both be greater than 30 Gpa, or only the tensile modulus of the first support 30 can be greater than 30 Gpa.

[0218] The embodiments provide some strength parameters and ranges of the first support 30 and / or the second support 40, so that the first support 30 and / or the second support 40 have higher strength, thereby better supporting the box.

[0219] Referring to FIG. 7 and FIG. 8, in some embodiments, the second support part 41 is a hard insulating structure, and the second extension part 42 is a hard or flexible insulating structure.

[0220] Since one end of the second support part 41 is connected to the end plate and the other end is connected to the first extension part 32, and since the second support part 41 is mainly used to support the part of the first extension part 32 extending out of the first support part 31, the second support part 41 is a hard structure, so that the second support part 41 can better support the first extension part 32, thereby enabling the first extension part 32 to better support the corresponding side wall of the box 10 and further improve the support performance of the box 10.

[0221] The material of the second support part 41 can include phenolic plastic, alumina ceramic, or other insulating hard materials.

[0222] Since the second extension part 42 is arranged between the electrode terminal 21 and the first extension part 32, between the connecting structure (such as the tab, etc.) of the adjacent battery monomer 20 and the first extension part 32 to fill the pores and provide certain support for the first extension part 32, the second extension part 42 can be a hard structure, so that the second extension part 42 can better support the first extension part 32; at this time, the material of the second extension part 42 can be phenolic plastic, alumina ceramic, or other insulating hard materials.

[0223] Since the second extension part 42 is also used to protect the electrode terminal 21, the connecting structure (such as the tab, etc.) of the adjacent battery monomer 20, or other structures, the second extension part 42 can be a flexible structure, in which case the second extension part 42 can better protect the electrode terminal 21, the connecting structure (such as the tab, etc.) of the adjacent battery monomer 20, or other structures; at this time, the material of the second extension part 42 can be insulating foam, glass fiber, or other insulating flexible materials.

[0224] In the embodiment, the second support part 41 is in a hard and insulating structure, so that the second support part 41 can better support the first extension part 32, thereby better improving the strength of the corresponding side wall of the box body 10; the second extension part 42 is in a hard or flexible and insulating structure, so that the second extension part 42 can not only support the first extension part 32 and reduce the gap between the first extension part 32 and the battery monomer 20, but also reduce the risk of damaging the electrode terminal 21.

[0225] In some embodiments, the battery device 100 includes the box body 10, the battery monomer 20, the first pressure relief structure 22, the second pressure relief structure 15, the first support part 30, and the second support part 40.

[0226] The box body 10 includes a box cover 11, a frame structure 14, and a bottom structure 12, and the three can enclose a first cavity 101 to accommodate the battery monomer 20; the box cover 11 is toward the interior of the passenger compartment of the vehicle 1000, and the box cover 11 is used as at least part of the floor of the vehicle 1000; the bottom structure 12 is toward the ground, and the bottom structure 12 is provided with an avoidance hole 121; the bottom structure 12 is also provided with a guard plate 13 on the side toward the ground, and a second cavity 131 is further provided between the bottom structure 12 and the guard plate 13, one end of the second cavity 131 is in communication with the avoidance hole 121, and the other end of the second cavity 131 is in communication with the first cavity 101 at a position close to the second pressure relief structure 15, so that the high-temperature and high-pressure flue gas in the second cavity 131 can be discharged to the space outside the box body 10 through the second pressure relief structure 15.

[0227] The second pressure relief structure 15 is provided on the box body 10, and the second pressure relief structure 15 is in communication with the first cavity 101, the second cavity 131, and the space outside the box body 10, so that the high-temperature and high-pressure flue gas in the first cavity 101 and the second cavity 131 can be discharged to the space outside the box body 10.

[0228] The battery monomer 20 is accommodated in the first cavity 101, and the battery monomer 20 includes a shell 23, the shell 23 includes a shell main body 231 and an end cover 232, the side of the shell main body 231 toward the box cover 11 is provided with the end cover 232, the electrode terminal 21 is provided on the end cover 232, the side of the shell main body 231 toward the bottom structure 12 is provided with the first pressure relief structure 22, and the first pressure relief structure 22 is toward and opposite to the avoidance hole 121, so that the high-temperature and high-pressure flue gas generated by the thermal runaway of the battery monomer 20 can be discharged into the avoidance hole 121.

[0229] The first support 30 is arranged between the end cover 232 and the box cover 11, and the first support 30 comprises a first support part 31 and a first extension part 32 connected to the first support part 31; one end of the first support part 31 is connected to the end cover 232, and the other end of the first support part 31 is connected to the box cover 11, and the first support part 31 is staggered with the electrode terminal 21; the first extension part 32 extends from the first support part 31 in a direction away from the first support part 31 along a plane perpendicular to the height direction Z of the box body 10, one side of the first extension part 32 is connected to the box cover 11, and the other side of the first extension part 32 is arranged in a spaced-apart manner opposite to the end cover 232.

[0230] The second support 40 is arranged between the first extension part 32 and the end cover 232, and the second support 40 comprises a second support part 41 and a second extension part 42; the second support part 41 is arranged between the first extension part 32 and the end cover 232, one side of the second support part 41 is connected to the first extension part 32, and the other side of the second support part 41 is connected to the end cover 232; the second extension part 42 is arranged between the electrode terminal 21, the gasket and the first extension part 32, one side of the second extension part 42 is connected to the electrode terminal 21 and / or the gasket, and the other end of the second extension part 42 is connected to the first extension part 32.

[0231] In the second aspect, some embodiments of the present application further provide a vehicle 1000 comprising the battery device 100 provided by some embodiments of the first aspect; in the vehicle 1000, the box cover 11 of the box body 10 of the battery device 100 can serve as at least part of the floor structure of the vehicle 1000, and the box cover 11 can serve as the entire floor of the vehicle 1000 or only as part of the floor of the vehicle 1000; at this time, the side of the box cover 11 facing the passenger compartment can be directly used to carry passengers and articles, and passengers can directly step on the box cover 11 of the box body 10, and articles can also be directly placed on the box cover 11 of the box body 10; the vehicle 1000 can be provided with only part of the floor structure or no floor structure, so as to reduce the overall weight of the vehicle 1000 and save the space of the original floor structure to increase the space of the passenger compartment.

[0232] In the third aspect, some embodiments of the present application further provide a power consumption device comprising the battery device 100 provided by some embodiments of the first aspect; in the power consumption device, the box cover 11 of the box body 10 of the battery device 100 has high strength and good support performance, the box body 10 has stronger protection performance for the battery monomer 20, and the box body 10 can also be used to carry other structures or articles.

[0233] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, wherein, The battery device comprises: a box body, a first cavity being arranged in the box body; a battery cell, the battery cell being arranged in the first cavity, one end of the battery cell in a first direction being connected to the box body, and the other end of the battery cell in the first direction being used for supporting the box body; the battery cell comprises a shell, an electrode assembly, an electrode terminal and a first pressure relief structure, the electrode terminal and the first pressure relief structure being arranged at two ends of the shell in the first direction respectively, the electrode assembly being arranged in the shell and connected to the electrode terminal; wherein the end of the battery cell provided with the electrode terminal is used for supporting the box body.

2. The battery device of claim 1, wherein, The box body further comprises a second cavity, the box body being provided with a relief hole communicating the first cavity and the second cavity, the first pressure relief structure being arranged opposite to the relief hole in the first direction.

3. The battery device of claim 2, wherein, The box body further comprises a frame structure, a box cover, a bottom structure and a protective plate, the frame structure being arranged through in the first direction, the box cover being arranged at one end of the frame structure in the first direction, the bottom structure being arranged at the other end of the frame structure in the first direction, the relief hole being arranged on the bottom structure, the box cover, the frame structure and the bottom structure forming the first cavity; the protective plate being arranged on the side of the bottom structure away from the box cover to form the second cavity with the bottom structure.

4. The battery device of claim 3, wherein, The bottom structure comprises a plate structure; the bottom structure being made of metal material by casting forming process, or the bottom structure comprising a profile.

5. The battery device according to claim 3 or 4, wherein The bottom structure comprises a heat exchange assembly.

6. The battery device according to any one of claims 3-5, wherein, The box body is provided with a second pressure relief structure, the second pressure relief structure being used for communicating the first cavity and a space outside the box body; the second cavity being communicated with the first cavity at a position close to the second pressure relief structure to discharge the substances in the second cavity to the space outside the box body through the second pressure relief structure.

7. The battery device according to any one of claims 1-6, wherein, The battery device further comprises a first support, in the first direction, the first support being located between the end of the shell provided with the electrode terminal and the box body, one side of the first support being connected to the shell, and the other side of the first support being connected to the box body.

8. The battery device of claim 7, wherein, The first support comprises a first support part and a first extension part connected to the first support part, the first support part being connected to the shell and arranged staggered with the electrode terminal; the first extension part being arranged on the side of the first support part away from the battery cell, the first extension part being connected to the box body, the first extension part being arranged opposite to and spaced apart from the electrode terminal.

9. The battery device of claim 8, wherein, The shell comprises a shell main body and an end cover connected to the shell main body, the end cover being arranged on one side of the shell main body in the first direction, the electrode terminal being arranged on the end cover, the first pressure relief structure being arranged on the side of the shell main body opposite to the end cover; the first support part abutting against the end cover, the first extension part being arranged spaced apart from the end cover.

10. The battery device of claim 9, wherein, In the first direction, the projection of the first support part on the end cover is staggered with the projection of the electrode terminal on the end cover.

11. The battery device according to claim 9 or 10, wherein In the first direction, a projection of the first support portion on the corresponding side wall of the box at least partially overlaps with a projection of the side wall of the housing main body on the corresponding side wall of the box.

12. The battery device of any one of claims 8-11, wherein, The first support member is a rigid and insulating structural member.

13. The battery device of any one of claims 8-12, wherein, The battery device further comprises a second support member, one side of the second support member is connected to the first extension portion and / or the box, and the other side of the second support member is at least partially connected to the electrode terminal.

14. The battery device of claim 13, wherein, The second support member comprises a second support portion and a second extension portion connected to the second support portion, one side of the second support portion is connected to the first extension portion and / or the box, and the other side of the second support portion is connected to the housing and is arranged staggered with the electrode terminal. One side of the second extension portion is connected to the first extension portion and / or the box, and the other side of the second extension portion is opposite to and connected to the electrode terminal.

15. The battery device according to claim 13 or 14, wherein At least part of the second support member is a rigid and insulating structural member or a flexible and insulating structural member.

16. The battery device of claim 15, wherein, The rigidity of the second support member is less than or equal to the rigidity of the first support member.

17. The battery device of claim 16, wherein, The tensile modulus of the first support member is greater than or equal to 30 Gpa; and / or The tensile modulus of the second support member is greater than or equal to 30 Gpa.

18. The battery device of claim 14, wherein, The second support portion is a rigid and insulating structural member, and the second extension portion is a rigid and insulating structural member or a flexible and insulating structural member.

19. A vehicle, wherein, The battery device as claimed in any one of claims 1-18; wherein a box cover of the box is used as at least part of a floor structure of the vehicle.

20. An electrical device, comprising: The battery device as claimed in any one of claims 1-18.

Images