Battery device and electrical device

Abstract

The present application discloses a battery device and an electrical device. The battery device comprises a first battery cell assembly, a second battery cell assembly, and a housing. The first battery cell assembly and the second battery cell assembly are stacked in a first direction within the housing. The first battery cell assembly comprises a plurality of first battery cells. The second battery cell assembly comprises a plurality of second battery cells. Each first battery cell comprises a first pressure relief mechanism disposed on the side facing away from the second battery cells. The wall of the housing facing the first pressure relief mechanisms serves as a first wall. The first wall is internally provided with a collection channel. The first wall is provided with first through-holes in communication with the collection channel, and the first through-holes face the first pressure relief mechanisms. The structure can improve the reliability of the battery device.

Description

Battery devices and electrical appliances Cross-references to related applications

[0001] This application claims priority to Chinese patent application 202421841969.7 entitled "Battery Device and Power Consumption Device", filed on July 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] With the development of new energy technologies, battery devices are being used more and more widely. Battery devices have high energy density, high reliability, long service life and green environmental protection, and have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swapping stations, engineering manufacturing, intelligent equipment and other fields. At the same time, they are also promoting the development and research of technologies in communication terminals, medical devices, energy development and other fields.

[0004] In battery device technology, improving the reliability of battery devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a battery device and an electrical device that can effectively improve the reliability of the battery device.

[0006] In a first aspect, embodiments of this application provide a battery device, which includes a first battery cell assembly, a second battery cell assembly, and a housing; the first battery cell assembly and the second battery cell assembly are stacked in the housing along a first direction, the first battery cell assembly includes a plurality of first battery cells, the second battery cell assembly includes a plurality of second battery cells, and the first battery cell includes a first pressure relief mechanism disposed on a side away from the second battery cell; wherein, the wall of the housing opposite to the first pressure relief mechanism is a first wall, the first wall has a storage channel, and the first wall has a first through hole communicating with the storage channel, the first through hole being opposite to the first pressure relief mechanism.

[0007] In the above technical solution, a first pressure relief mechanism is provided at the end of the first battery cell near the first wall, so that the first pressure relief mechanism is far away from the second battery cell assembly, thereby mitigating the impact of the emissions from the first battery cell on the second battery cell assembly.

[0008] The interior of the first wall is formed with a receiving channel, and the side of the first wall facing the first battery monomer assembly is provided with a first through hole opposite to the first pressure relief mechanism, and the first through hole is communicated with the receiving channel, so that when the first pressure relief mechanism is actuated, the exhaust of the first battery monomer can enter the receiving channel to a large extent through the first through hole, and the receiving channel collects the exhaust of the first battery monomer, so as to reduce or not impact the second battery monomer assembly, thereby improving the reliability of the battery device.

[0009] In some embodiments, the first through hole is provided with a plurality of first through holes, and the plurality of first through holes correspond one-to-one to the plurality of first battery monomers.

[0010] In the above technical solution, the plurality of first through holes correspond one-to-one to the plurality of first battery monomers, so that the exhaust of each first battery monomer can enter the receiving channel to a large extent through the corresponding first through hole, further reducing the impact of the exhaust of the first monomer on the second battery monomer assembly.

[0011] In some embodiments, the first battery monomer assembly includes a plurality of first battery monomer units, and the plurality of first battery monomer units are arranged along a second direction, and each of the first battery monomer units includes a plurality of first battery monomers arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0012] In the above technical solution, in the case that the plurality of first through holes correspond one-to-one to the plurality of first battery monomers, the plurality of first battery monomer units are arranged along the second direction, and each of the first battery monomer units includes a plurality of first battery monomers arranged along the third direction. In this arrangement, the first through hole can also form a corresponding layout, which is conducive to the arrangement of the first through hole and reduces the difficulty of the arrangement of the first through hole.

[0013] In some embodiments, the receiving channel includes a plurality of sub-channels, and the plurality of sub-channels are arranged in the second direction, and each of the sub-channels extends along the third direction, and the plurality of sub-channels correspond one-to-one to the plurality of first battery monomer units, and each of the sub-channels is used to collect the exhaust of the first battery monomer unit corresponding to the sub-channel.

[0014] In the above technical solution, each sub-channel is used to collect the exhaust of the first battery monomer unit corresponding to the sub-channel, which has the advantage that when a first battery monomer in one of the first battery monomer units is in thermal runaway, the exhaust of the thermal runaway first battery monomer enters the corresponding first sub-through hole, which reduces the impact of the exhaust on the adjacent battery monomer unit and improves the reliability of the battery device.

[0015] In some embodiments, the first wall is an extruded profile, and the sub-channel is a cavity in the profile.

[0016] In the technical solution, the first wall is an extruded profile, which can obtain a first wall with high structural strength. The sub-channel is a cavity in the profile, that is, the cavity of the first wall is used as the receiving channel, which eliminates the preparation process of the receiving channel, reduces the preparation difficulty of the sub-channel, and can improve the production efficiency.

[0017] In some embodiments, the battery device further comprises a thermal management component, at least part of the thermal management component is arranged between the first battery monomer assembly and the second battery monomer assembly to adjust the temperature of the first battery monomer assembly and the second battery monomer assembly.

[0018] In the technical solution, the thermal management component adjusts the temperature of the first battery monomer assembly and the second battery monomer assembly, and the first battery monomer assembly and the second battery monomer assembly share the thermal management component, without the need to configure a thermal management component for each battery monomer assembly, thereby simplifying the number of components and improving the utilization rate of the thermal management component.

[0019] In the embodiment in which the first battery assembly and the second battery monomer assembly are arranged in a stacked manner along the gravity direction, the first battery monomer assembly and the second battery monomer assembly share the thermal management component, which facilitates the inversion of the first battery monomer assembly, so that the first pressure relief mechanism of the first battery monomer assembly faces downward to release pressure in a direction away from the second battery monomer assembly.

[0020] In some embodiments, the battery device further comprises a first end plate and a second end plate, the first end plate and the second end plate are accommodated in the box, the first end plate and the second end plate are arranged in a spaced manner along a third direction, the thermal management component connects the first end plate and the second end plate, and the third direction is perpendicular to the first direction.

[0021] In the technical solution, the thermal management component connects the first end plate and the second end plate, and the first end plate and the second end plate are respectively located at both ends of the thermal management component along the third direction, which can improve the structural stability of the thermal management component in the box, thereby improving the stability and rigidity of the entire battery device.

[0022] In some embodiments, the thermal management component has a first surface facing the first battery monomer assembly and a second surface facing the second battery monomer assembly, along the first direction, both ends of the first end plate respectively exceed the first surface and the second surface, both ends of the second end plate respectively exceed the first surface and the second surface, the first battery monomer assembly is located between the first end plate and the second end plate, and the second battery monomer assembly is located between the first end plate and the second end plate.

[0023] In the technical solution, the two ends of the first end plate respectively extend beyond the first surface and the second surface, that is, the two ends of the first end plate along the first direction respectively extend beyond the thermal management component, and the two ends of the second end plate along the first direction respectively extend beyond the thermal management component. The first battery monomer assembly is located between the first end plate and the second end plate, which can alleviate the movement of the first battery monomer assembly in the second direction, and the second battery monomer assembly is located between the first end plate and the second end plate, which can alleviate the movement of the second battery monomer assembly in the second direction, thereby improving the structural stability of the battery device.

[0024] In some embodiments, the box further comprises a second wall, the second wall is located on the side of the first end plate away from the second end plate and is spaced apart from the first end plate along the third direction, and a collection cavity is formed between the first end plate and the second wall; the first wall is provided with a second through hole, and the collection cavity and the receiving channel are communicated through the second through hole.

[0025] In the technical solution, due to the limited space of the receiving channel, the exhaust of the first battery device accumulates in the receiving channel, and uneven pressure can cause the first wall to deform. By forming a collection cavity between the first end plate and the second wall, the collection cavity and the receiving channel are communicated through the second through hole, so that the receiving channel can guide the exhaust to the collection cavity through the second through hole, thereby alleviating the risk of deformation of the first wall, and at the same time, the exhaust is away from the first battery monomer assembly, reducing the influence of the exhaust temperature on the first battery monomer assembly.

[0026] In some embodiments, the receiving channel comprises a plurality of sub-channels, and the plurality of sub-channels are spaced apart along the second direction, each of the sub-channels extends along the third direction, the second through hole is provided with a plurality of second through holes, and the plurality of second through holes correspond to the plurality of sub-channels one by one, and the first direction, the second direction and the third direction are perpendicular to each other.

[0027] In the technical solution, the plurality of second through holes correspond to the plurality of sub-channels one by one, so that each sub-channel can guide the exhaust to the collection cavity through the corresponding second through hole, thereby greatly improving the flow efficiency of the receiving channel.

[0028] In some embodiments, along the first direction, the orthogonal projection of the first end plate on the first wall is a first projection, and the orthogonal projection of the second end plate on the first wall is a second projection; along the third direction, the second through hole is located on the side of the first projection away from the second projection.

[0029] In the technical solution, by locating the second through hole on the side of the first projection away from the second projection, the shielding degree of the first end plate and the second wall to the second through hole can be reduced, so that the exhaust in the receiving channel is more easily guided to the collection cavity through the second through hole, thereby improving the flow efficiency.

[0030] In some embodiments, the battery device further comprises a pressure relief valve disposed on the second wall, the pressure relief valve configured to discharge the discharge collected in the collection cavity.

[0031] In the above technical solution, the pressure relief valve can discharge the discharge collected in the collection cavity from the box, further improving the reliability of the battery device.

[0032] In some embodiments, the first end plate is integrally formed with the thermal management component; and / or, the second end plate is integrally formed with the thermal management component.

[0033] In the above technical solution, the first end plate is integrally formed with the thermal management component, the connection stability between the first end plate and the thermal management component is high, and the assembly work of the first end plate and the thermal management component is saved in the battery device assembly process, which can improve the assembly efficiency of the battery device.

[0034] The second end plate is integrally formed with the thermal management component, the connection stability between the second end plate and the thermal management component is high, and the assembly work of the second end plate and the thermal management component is saved in the battery device assembly process, which can improve the assembly efficiency of the battery device.

[0035] In some embodiments, a first cavity is formed in the interior of the first end plate; and / or, a second cavity is formed in the interior of the second end plate.

[0036] In the above technical solution, the first cavity enables the first end plate to have the ability to resist deformation, and the first end plate can absorb external impact force, improving the reliability of the battery device.

[0037] The second cavity enables the second end plate to have the ability to resist deformation, and the second end plate can absorb external impact force, improving the reliability of the battery device.

[0038] In some embodiments, the box further comprises a third wall, the third wall being located on a side of the second end plate away from the first end plate along the third direction, and the second end plate being connected to the third wall.

[0039] In the above technical solution, the third wall is located on the side of the second end plate away from the first end plate, i.e., the second end plate is arranged close to the third wall, and the connection of the second end plate to the third wall can improve the structural stability of the battery device.

[0040] In some embodiments, the box further comprises a fourth wall and a fifth wall opposite to each other along a second direction, one end of the thermal management component being connected to the fourth wall and the other end being connected to the fifth wall, and the second direction being perpendicular to a plane formed by the first direction and the third direction.

[0041] In the technical solution, one end of the heat management component is connected to the fourth wall and the other end is connected to the fifth wall, which can improve the assembly stability of the heat management component and the box body, and further improve the structural stability of the battery device.

[0042] In some embodiments, the first battery monomer assembly and the second battery monomer assembly are both connected to the heat management component, and the heat management component is used to simultaneously bear the first battery monomer assembly and the second battery monomer assembly.

[0043] In the technical solution, the heat management component is used to simultaneously bear the first battery monomer assembly and the second battery monomer assembly, that is, the heat management component simultaneously provides an action force to overcome gravity for the first battery monomer assembly and the second battery monomer assembly.

[0044] In some embodiments, along the first direction, the second battery monomer includes a second pressure relief mechanism arranged on the side away from the first battery monomer.

[0045] In some embodiments, the second battery monomer is provided with a second pressure relief mechanism at the end away from the heat management component.

[0046] In the technical solution, the second pressure relief mechanism is arranged at the end of the second battery monomer away from the heat management component, so that the second pressure relief mechanism is arranged away from the first battery monomer assembly, reducing the impact of the emissions of the second battery monomer on the first battery monomer assembly, and improving the reliability of the battery device.

[0047] In some embodiments, along the first direction, the first battery monomer further includes a first electrode terminal arranged on the side away from the second battery monomer, and the second battery monomer further includes a second electrode terminal arranged on the side away from the first battery monomer.

[0048] In the technical solution, the first electrode terminal is arranged away from the heat management component, facilitating heat exchange between the first battery monomer and the heat management component, and improving the heat exchange efficiency. The second electrode terminal is arranged away from the heat management component, facilitating heat exchange between the second battery monomer and the heat management component, and improving the heat exchange efficiency.

[0049] In some embodiments, the first direction is parallel to the direction of gravity.

[0050] In the technical solution, the first direction is parallel to the direction of gravity, that is, the first battery monomer assembly is located below the heat management component, and the second battery monomer assembly is located above the heat management component. In this structure, the first wall is provided with a receiving channel, which can especially alleviate the impact of the emissions of the first battery monomer on the second battery monomer assembly due to high temperature or high pressure.

[0051] The embodiment of the present application provides a kind of electric device, including the battery device of any embodiment described above, and the battery device is used to power supply electric device. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0053] Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0054] Fig. 2 is a schematic structural diagram of a battery device according to some embodiments of the present application from one perspective;

[0055] Fig. 3 is an exploded schematic diagram of a battery device according to some embodiments of the present application;

[0056] Fig. 4 is an exploded schematic diagram of a battery cell according to some embodiments of the present application;

[0057] Fig. 5 is a schematic structural diagram of a battery device according to some embodiments of the present application from another perspective;

[0058] Fig. 6 is a sectional view of Fig. 5 along A-A;

[0059] Fig. 7 is an enlarged view of portion A in Fig. 6;

[0060] Fig. 8 is a sectional view of Fig. 5 along C-C;

[0061] Fig. 9 is an assembly schematic diagram of a first end plate, a second end plate, a first battery cell assembly, a second battery cell assembly and a thermal management component according to some embodiments of the present application;

[0062] Fig. 10 is an assembly schematic diagram of a thermal management component, a first end plate and a second end plate according to some embodiments of the present application.

[0063] Icon: 100 - battery device; 10 - battery cell; 12 - end cap; 11 - housing; 13 - electrode assembly; 14 - electrode terminal; 15 - pressure relief mechanism; 20 - box body; 21 - bottom plate; 22 - top cover; 23 - frame; 24 - sealing member; 25 - second mounting member; 26 - third mounting member; 20a - first wall; 20b - second wall; 20c - third wall; 20d - fourth wall; 20e - fifth wall; 211 - receiving channel; 2111 - sub-channel; 212 - first through hole; 213 - second through hole; 10a - first battery cell assembly; 101a - first battery cell unit; 1011a - first battery cell; 14a - first electrode terminal; 15a - first pressure relief mechanism; 10b - second battery cell assembly; 101b - second battery cell unit; 1011b - second battery cell; 14b - second electrode terminal; 15b - second pressure relief mechanism; 30 - thermal management component; 31 - first surface; 32 - second surface; 40 - first end plate; 41 - first cavity; 42 - communication portion; 43 - first mounting member; 50 - second end plate; 51 - second cavity; 60 - collection cavity; 70 - pressure relief valve; 1000 - vehicle; 200 - motor; 300 - controller; Z - first direction; X - second direction; Y - third direction.

[0064] The accompanying drawings are not drawn to scale. DETAILED DESCRIPTION

[0065] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0066] 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 in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including", "comprising" and "having" in the specification herein are meant to encompass the inclusion of one or more elements, not the exclusion of any other elements; the use of the terms "first", "second", and the like in the specification herein is intended to distinguish between similar objects only and is not intended to imply any order or priority.

[0067] Reference to "an embodiment" or "the embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" or "in the embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive.

[0068] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] In the description of the application, it is necessary to point out that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0070] The term "and / or" in this application 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 can represent: A exists alone, B exists alone, and A and B exist at the same time.

[0071] In the embodiments of the application, the same reference signs represent the same components, and for the sake of brevity, detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of integrated devices, are only exemplary and should not constitute any limitation on the application.

[0072] "Multiple" appearing in the application means more than two (including two).

[0073] In the present application, the battery cell can include, but is not limited to, a lithium-ion secondary battery device, a lithium-ion primary battery device, a lithium-sulfur battery device, a sodium lithium-ion battery device, a sodium-ion battery device, or a magnesium-ion battery device, etc. The battery cell includes, but is not limited to, a cylinder, a flat body, a cuboid, or other shapes, etc. The battery cell generally includes, in the form of packaging, a cylindrical battery cell, a square battery cell, and a soft-pack battery cell, etc.

[0074] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work, and the metal ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive electrode sheet and the negative electrode sheet from short-circuiting to a certain extent, and at the same time can make the active ions pass through.

[0075] The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab.

[0076] Taking a lithium-ion battery device as an example, the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The positive electrode current collector can adopt a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver surface plating treatment, stainless steel with silver surface plating treatment, stainless steel, copper, aluminum, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a high polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a high polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0077] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab.

[0078] The negative electrode current collector can adopt a metal foil or a composite current collector. For example, as a metal foil, aluminum with silver surface plating treatment, stainless steel with silver surface plating treatment, stainless steel, copper, aluminum, a carbon electrode, carbon, nickel, or titanium, etc. can be used. The negative electrode active material can be carbon or silicon, etc.

[0079] In order to reduce the risk of fusing caused by a large current to some extent, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the isolation film can be PP (polypropylene), PE (polyethylene), or the like. In addition, the electrode assembly can be a winding type structure or a stacked type structure.

[0080] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0081] In some embodiments, the battery apparatus refers to an energy storage device, which includes an energy storage box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0082] The pressure relief mechanism mentioned in the embodiments of the present application refers to an element or component that is actuated to release the internal pressure or temperature of the battery cell when the internal pressure or temperature of the battery cell reaches a predetermined threshold. The threshold value is different according to different design requirements. The threshold value can depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte, and the isolation film in the battery cell. The pressure relief mechanism can take the form of an explosion-proof valve, an explosion-proof sheet, an air valve, a pressure relief valve, or a safety valve, and can specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e., when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is broken, thereby forming an opening or passage for the internal pressure or temperature to be released.

[0083] The "actuation" mentioned in the present application refers to the pressure relief mechanism producing an action or being activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The action produced by the pressure relief mechanism can include but is not limited to: at least a part of the pressure relief mechanism being broken, broken, torn, or opened, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged outward from the actuated part as the discharge. In this way, the battery cell can be relieved of pressure and temperature under controllable pressure or temperature, thereby reducing the possibility of a more serious accident.

[0084] The discharge from the battery cell mentioned in the present application includes but is not limited to: electrolyte, dissolved or split positive and negative electrode tabs, fragments of isolation film, high-temperature and high-pressure gas generated by reaction, flame, etc.

[0085] The development of battery device technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and the reliability of the battery device.

[0086] In the battery device technology, two battery cell assembly layers are stacked to improve space utilization. In the battery device with such a structure, the emissions of the battery cells in the two battery cell assemblies are prone to impact each other, especially in the structure in which the two battery cell assemblies are stacked in an up-down manner, the emissions of the lower battery cell assembly directly impact the upper battery cell assembly under the action of high temperature or high pressure, causing secondary damage and reducing the reliability of the battery device.

[0087] In view of this, in order to solve the problem that in the battery device of two battery cell assemblies, the emissions of one battery cell assembly impact the other battery cell assembly, reducing the reliability of the battery device, the embodiments of the present application provide a technical solution, in which the pressure relief mechanism of the battery cell in one of the battery cell assemblies is arranged on the side facing away from the other battery cell assembly, and a receiving channel is arranged on the wall of the box body close to the pressure relief mechanism, so that the emissions of the battery cell in the battery cell assembly enter the receiving channel, thereby less impacting or not impacting the other battery cell assembly, and thus the reliability of the battery device can be improved.

[0088] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0089] The following embodiments are described for convenience with the electric device being a vehicle 1000.

[0090] Please refer to FIG. 1, which is a structural schematic diagram of the vehicle 1000 according to some embodiments of the present application. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or 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 the operating power supply of the vehicle 1000.

[0091] 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.

[0092] In some embodiments of the present application, the battery device 100 can not only serve as the power source for operating the vehicle 1000, but also serve as the driving power source for the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0093] In some embodiments, referring to FIG. 2 and FIG. 3, FIG. 2 is a structural schematic diagram of the battery device 100 in some embodiments of the present application from one perspective; and FIG. 3 is an exploded schematic diagram of the battery device 100 in some embodiments of the present application. The battery device 100 includes a plurality of battery monomers 10. The plurality of battery monomers 10 can be connected in series, in parallel, or in a mixed connection. Among them, the mixed connection means that there are both series connection and parallel connection among the plurality of battery monomers 10.

[0094] In some embodiments, the battery device 100 can further include a busbar component (not shown in the figure), and the plurality of battery monomers 10 can be electrically connected through the busbar component to realize the series connection, parallel connection, or mixed connection of the plurality of battery monomers 10.

[0095] The busbar component can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0096] In some embodiments, the battery device 100 can further include a box 20 for accommodating the battery monomers 10. The box 20 can include a bottom plate 21, a top cover 22, and a frame 23, the bottom wall of the frame 23 forms a first opening, the top of the frame 23 forms a second opening, the bottom plate 21 covers the first opening, and the top cover 22 covers the second opening to define an accommodation space for accommodating the battery monomers 10.

[0097] The bottom plate 21 and the frame 23 can be connected by welding, bolt locking, etc. to form the lower box 20. The top cover 22 and the frame 23 can be connected by bolt locking, facilitating the disassembly of the top cover 22. The connection between the top cover 22 and the frame 23 can be sealed by a sealing element 24 (not shown in the figure), which can be a sealing ring, sealing glue, etc.

[0098] Among them, the bottom plate 21 and the top cover 22 can be various shapes, such as a cuboid, a cylinder, etc. The bottom plate 21 can be a hollow structure with one side open, and the top cover 22 can also be a hollow structure with one side open. The open side of the top cover 22 covers the second opening, and the open side of the top cover 22 covers the first opening to form the box 20 with the accommodation space. Of course, the top cover 22 can also be a hollow structure with one side open, and the bottom plate 21 can be a plate structure. The open side of the top cover 22 covers the second opening, and the open side of the top cover 22 covers the first opening to form the box 20 with the accommodation space.

[0099] In some embodiments, the frame 23 can be omitted, and the bottom plate 21 and the top cover 22 can be coupled to each other to define a receiving space for receiving the battery cell 10. The connection between the bottom plate 21 and the top cover 22 can be sealed by a sealing element, such as a sealing ring or sealing glue.

[0100] Referring to FIG. 4, which is an exploded view of the battery cell 10 according to some embodiments of the present application, the battery cell 10 can include a housing 11, an electrode assembly 13, an end cover 12, an electrode terminal 14, a pressure relief mechanism 15, and other functional components.

[0101] The housing 11 is a component for receiving the electrode assembly 13. The housing 11 can be a hollow structure with an opening at one end, or a hollow structure with openings at both ends. The housing 11 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing 11 can have various shapes, such as a cylinder or a cuboid. For example, in FIG. 3, the housing 11 is a cuboid.

[0102] The end cover 12 is a component that covers the opening of the housing 11 to isolate the internal environment of the battery cell 10 from the external environment. The end cover 12 covers the opening of the housing 11, and the end cover 12 and the housing 11 together define a sealed space for receiving the electrode assembly 13, the electrolyte, and other functional components. The shape of the end cover 12 can be adapted to the shape of the housing 11, such as a rectangular plate structure adapted to a cuboid structure of the housing 11, or a circular plate structure adapted to a cylindrical structure of the housing 11. The end cover 12 can be made of various materials, such as metal materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cover 12 can be the same as or different from the material of the housing 11.

[0103] In the battery cell 10, there can be one or two end covers 12. If the housing 11 is a hollow structure with an opening at one end, one end cover 12 is provided. If the housing 11 is a hollow structure with openings at both ends, two end covers 12 are provided, and the two end covers 12 cover the two openings of the housing 11, respectively.

[0104] The pressure relief mechanism 15 can be provided on the end cover 12. The pressure relief mechanism 15 is used to release the discharge of the battery cell 10 when the temperature or pressure inside the battery cell 10 reaches a threshold value.

[0105] The electrode terminal 14 is a bridge for connecting the electrodes inside the battery cell 10 to the external circuit, and the electrode terminal 14 can achieve input and output of current. The material of the electrode terminal 14 includes but is not limited to copper, aluminum, copper alloy, aluminum alloy, etc.

[0106] The embodiment of the present application provides a battery device 100 which can improve the reliability of the battery device 100, and the specific structure of the battery device 100 is described in detail below in combination with the drawings.

[0107] Fig. 5 is a structural schematic view of the battery device 100 in another perspective according to some embodiments of the present application; Fig. 6 is a sectional view of Fig. 5 along A-A; Fig. 7 is an enlarged view of part A in Fig. 6; and Fig. 8 is a sectional view of Fig. 5 along C-C.

[0108] The embodiment of the present application provides a battery device 100, referring to Fig. 3, the battery device 100 comprises a first battery monomer assembly 10a, a second battery monomer assembly 10b and a box 20. The first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a first direction Z in the box 20, the first battery monomer assembly 10a comprises a plurality of first battery monomers 1011a, the second battery monomer assembly 10b comprises a plurality of second battery monomers 1011b, and the first battery monomer 1011a comprises a first pressure relief mechanism 15a arranged on a side facing away from the second battery monomer 1011b. Wherein, the wall body opposite to the first pressure relief mechanism 15a is a first wall, the first wall 20a has a receiving channel 211 therein, the first wall 20a is provided with a first through hole in communication with the receiving channel 211, and the first through hole 212 is opposite to the first pressure relief mechanism 15a.

[0109] The first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a first direction Z, which can be a gravity direction, a direction having a certain angle with the gravity direction, or a horizontal direction. If the first direction Z is the gravity direction, the first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a vertical direction. If the first direction Z is the horizontal direction, the first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a horizontal direction. For example, as shown in Fig. 3, the first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a vertical direction, the first battery monomer assembly 10a is below, and the second battery monomer assembly 10b is above.

[0110] The first battery monomer assembly 10a can also include a plurality of first battery monomer units 101a arranged along the second direction X, each of the first battery monomer units 101a including a plurality of first battery monomers 1011a arranged along the third direction Y. Correspondingly, the second battery monomer assembly 10b can also include a plurality of second battery monomer units 101b arranged along the second direction X, each of the second battery monomer units 101b including a plurality of second battery monomers 1011b arranged along the third direction Y. For example, as shown in FIG. 3, the first battery monomer assembly 10a includes three first battery monomer units 101a, and the second battery monomer assembly 10b includes three second battery monomer units 101b.

[0111] The first wall 20a can be a bottom plate 21, or can be another wall of the box 20, in correspondence with the position of the first battery monomer assembly 10a.

[0112] The first wall 20a can be a bottom plate 21, or can be another wall of the box 20, in correspondence with the position of the first battery monomer assembly 10a.

[0113] The first wall 20a can be a bottom plate 21, or can be another wall of the box 20, in correspondence with the position of the first battery monomer assembly 10a.

[0114] The first wall 20a can be a bottom plate 21, or can be another wall of the box 20, in correspondence with the position of the first battery monomer assembly 10a.

[0115] In this embodiment, the first battery monomer 1011a is provided with the first pressure relief mechanism 15a at one end close to the first wall 20a, so that the first pressure relief mechanism 15a is away from the second battery monomer assembly 10b, thereby relieving the impact of the discharge of the first battery monomer 1011a on the second battery monomer assembly 10b.

[0116] The first wall 20a is internally formed with a receiving channel 211, and a first through hole 212 opposite to the first pressure relief mechanism 15a is arranged on the side of the first wall 20a facing the first battery monomer assembly 10a, and the first through hole 212 is in communication with the receiving channel 211, so that when the first pressure relief mechanism 15a is actuated, the exhaust of the first battery monomer 1011a can enter the receiving channel 211 to a large extent through the first through hole 212, thereby reducing or not impacting the second battery monomer assembly 10b, thereby improving the reliability of the battery device 100.

[0117] Referring to FIG. 3, in some embodiments, the first through hole 212 is provided with a plurality of first through holes 212, and the plurality of first through holes 212 correspond one-to-one to the plurality of first battery monomers 1011a.

[0118] It can be understood that the plurality of first through holes 212 correspond one-to-one to the battery monomers 10 provided with the first pressure relief mechanism 15a.

[0119] The first through hole 212 can be configured as a circular hole, a rectangular hole, a waist-shaped hole, etc.

[0120] In the present embodiment, the plurality of first through holes 212 correspond one-to-one to the plurality of first battery monomers 1011a, so that the exhaust of each first battery monomer 1011a can enter the receiving channel 211 to a large extent through the corresponding first through hole 212, further reducing the impact of the exhaust of the first monomer on the second battery monomer assembly 10b.

[0121] In some embodiments, the first through hole 212 is provided with a plurality of first through holes 212, and the plurality of first through holes 212 correspond one-to-one to the plurality of first battery monomers 1011a. The first battery monomer assembly 10a includes a plurality of first battery monomer units 101a, and the plurality of first battery monomer units 101a are arranged along a second direction X, each first battery monomer unit 101a includes a plurality of first battery monomers 1011a arranged along a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0122] In the case where the plurality of first through holes 212 correspond one-to-one to the plurality of first battery monomers 1011a, the plurality of first battery monomer units 101a are arranged along the second direction X, and each first battery monomer unit 101a includes a plurality of first battery monomers 1011a arranged along the third direction Y. In this arrangement, the first through hole 212 can also form a corresponding layout, which is conducive to the arrangement of the first through hole 212 and reduces the difficulty of arranging the first through hole 212.

[0123] Referring to FIG. 8, in some embodiments, the receiving channel 211 includes a plurality of sub-channels 2111, the plurality of sub-channels 2111 are arranged at intervals along the second direction X, each of the sub-channels 2111 extends along the third direction Y, the plurality of sub-channels 2111 correspond to the plurality of first battery monomer units 101a one by one, and each of the sub-channels 2111 is used to collect the emissions of the first battery monomer unit 101a corresponding to the sub-channel 2111.

[0124] Understandably, one sub-channel 2111 corresponds to one battery monomer 10 assembly in the present embodiment. Exemplarily, as shown in FIG. 3 and FIG. 8, the first battery monomer assembly 10a includes three first battery monomer units 101a, and the receiving channel 211 includes three sub-channels 2111.

[0125] It should be understood that, in other embodiments, the plurality of sub-channels 2111 and the plurality of first battery monomer units 101a can also not be in a one-to-one correspondence, for example, two or more sub-channels 2111 can correspond to one first battery monomer unit 101a, and two or more first battery monomer units 101a can also correspond to one sub-channel 2111.

[0126] Each of the sub-channels 2111 can extend linearly along the third direction Y, and the cross section (the section on the XZ plane) of the sub-channel 2111 can be configured as a rectangle, an arc, or a special shape, etc.

[0127] In the present embodiment, each of the sub-channels 2111 is used to collect the emissions of the first battery monomer unit 101a corresponding to the sub-channel 2111, and the advantage is that, when thermal runaway occurs in one of the first battery monomer units 101a, the emissions of the thermal runaway first battery monomer 1011a enter the corresponding first sub-hole, which can reduce the impact of the emissions on the adjacent battery monomer 10 assembly, and improve the reliability of the battery device 100.

[0128] In some embodiments, the first wall 20a is an extrusion profile, and the sub-channel 2111 is a cavity in the profile.

[0129] The first wall 20a being an extrusion profile can obtain a first wall 20a with high structural strength. The sub-channel 2111 being a cavity in the profile, i.e., using the cavity as the receiving channel 211, the receiving channel 211 and the first wall 20a are prepared and formed at one time, which eliminates the preparation process of the receiving channel 211, reduces the preparation difficulty of the sub-channel 2111, and can improve the production efficiency.

[0130] In some embodiments, the battery device 100 further comprises a thermal management component 30, at least a portion of the thermal management component 30 is disposed between the first battery cell assembly 10a and the second battery cell assembly 10b to regulate the temperature of the first battery cell assembly 10a and the second battery cell assembly 10b.

[0131] It can be understood that the first battery cell assembly 10a and the second battery cell assembly 10b share the thermal management component 30. By sharing the thermal management component 30 by the first battery cell assembly 10a and the second battery cell assembly 10b, the number of thermal management components 30 is reduced.

[0132] The thermal management component 30 is a component for containing a fluid to regulate the temperature of the first battery cell assembly 10a and the second battery cell assembly 10b.

[0133] The fluid here can be a liquid or a gas, and the temperature regulation refers to heating or cooling the plurality of battery cells 10. In the case of cooling or lowering the temperature of the battery cells 10, the thermal management component 30 is used to contain a cooling fluid to lower the temperature of the plurality of battery cells 10, at this time, the thermal management component 30 can also be referred to as a cooling component, a cooling system, or a cooling plate, etc., and the fluid contained therein can also be referred to as a cooling medium or a cooling fluid, and more specifically, can be referred to as a cooling liquid or a cooling gas. In addition, the thermal management component 30 can also be used for heating to warm the plurality of battery cells 10. Optionally, the fluid can be circulated to achieve better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0134] The first battery cell assembly 10a can be connected to the thermal management component 30 by a thermal conductive adhesive, and the second battery cell assembly 10b can be connected to the thermal management component 30 by a thermal conductive adhesive.

[0135] FIG. 9 is an assembly diagram of the first end plate 40, the second end plate 50, the first battery cell assembly 10a, the second battery cell assembly 10b, and the thermal management component 30 according to some embodiments of the present application; and FIG. 10 is an assembly diagram of the thermal management component 30, the first end plate 40, and the second end plate 50 according to some embodiments of the present application.

[0136] Referring to FIGS. 9 and 10, in some embodiments, the battery device 100 further comprises a first end plate 40 and a second end plate 50, the first end plate 40 and the second end plate 50 are contained in the box 20, the first end plate 40 and the second end plate 50 are spaced apart along a third direction Y, the thermal management component 30 is connected to the first end plate 40 and the second end plate 50, and the third direction Y is perpendicular to the first direction Z.

[0137] The material of the first end plate 40 and the thermal management component 30 can be the same or different, and the material of the second end plate 50 and the thermal management component 30 can be the same or different.

[0138] In some embodiments, the thermal management component 30 can be configured as a rectangular plate. In some embodiments, along the thickness direction of the thermal management component 30, both ends of the first thermal management component 30 can each extend beyond the thermal management component 30, both ends of the second thermal management component 30 can also each extend beyond the thermal management component 30, and the first end plate 40, the thermal management component 30, and the second end plate 50 are connected to form an H-shaped structure (as shown in FIGS. 9 and 10). In some embodiments, along the thickness direction of the thermal management component 30, the first thermal management component 30 can extend beyond the thermal management component 30 only near one end of the first wall 20a, and the second thermal management component 30 can also extend beyond the thermal management component 30 only near one end of the first wall 20a, and the first end plate 40, the thermal management component 30, and the second end plate 50 are connected to form an n-shaped structure (not shown in the figure).

[0139] The first end plate 40, the thermal management component 30, and the second end plate 50 can be integrally formed to improve the connection strength, and the first end plate 40, the thermal management component 30, and the second end plate 50 can be integrally formed by an extrusion process, an injection molding process, or the like. The first end plate 40, the thermal management component 30, and the second end plate 50 can also be prepared separately and then fixedly connected, and the first end plate 40, the thermal management component 30, and the second end plate 50 can be fixedly connected by bonding, welding, or the like.

[0140] In the present embodiment, the thermal management component 30 connects the first end plate 40 and the second end plate 50, and the first end plate 40 and the second end plate 50 are respectively located at both ends of the thermal management component 30 along the third direction Y, which can improve the structural stability of the thermal management component 30 in the box body 20, thereby improving the stability and rigidity of the entire battery device 100.

[0141] In some embodiments, the thermal management component 30 has a first surface 31 facing the first battery monomer assembly 10a and a second surface 32 facing the second battery monomer assembly 10b, along the first direction Z, both ends of the first end plate 40 extend beyond the first surface 31 and the second surface 32, respectively, and both ends of the second end plate 50 extend beyond the first surface 31 and the second surface 32, respectively, the first battery monomer assembly 10a is located between the first end plate 40 and the second end plate 50, and the second battery monomer assembly 10b is located between the first end plate 40 and the second end plate 50.

[0142] In embodiments in which the first direction Z is parallel to the direction of gravity, it can be understood that the lower surface of the thermal management component 30 is the first surface 31, and the upper surface of the thermal management component 30 is the second surface 32.

[0143] The two ends of the first end plate 40 respectively protrude out of the first surface 31 and the second surface 32, that is, the two ends of the first end plate 40 along the first direction Z respectively protrude out of the thermal management component 30, and the two ends of the second end plate 50 along the first direction Z respectively protrude out of the thermal management component 30. The first battery monomer assembly 10a is located between the first end plate 40 and the second end plate 50, which can alleviate the movement of the first battery monomer assembly 10a in the second direction X, and the second battery monomer 1011b is located between the first end plate 40 and the second end plate 50, which can alleviate the movement of the second battery monomer assembly 10b in the second direction X, thereby improving the structural stability of the battery device 100.

[0144] Referring to FIG. 6, in some embodiments, the box 20 further comprises a second wall 20b and a third wall 20c, the second wall 20b and the third wall 20c are oppositely arranged along the third direction Y, and the first end plate 40 and the second end plate 50 are located between the second wall 20b and the third wall 20c.

[0145] Referring to FIG. 6 and FIG. 3, in some embodiments, the box 20 further comprises a second wall 20b, which is located on the side of the first end plate 40 away from the second end plate 50 and is spaced apart from the first end plate 40 along the third direction Y, and a collection cavity 60 is formed between the first end plate 40 and the second wall 20b. The first wall 20a is provided with a second through hole 213, and the collection cavity 60 and the receiving channel 211 are communicated through the second through hole 213.

[0146] The first wall 20a is provided with a second through hole 213 for communicating the receiving channel 211 with the collection cavity 60. The second through hole 213 can be arranged on the side of the first wall 20a facing the first battery monomer assembly 10a (as shown in FIG. 6 and FIG. 3). The second through hole 213 can also be arranged on the end wall of the first wall 20a close to the second wall 20b. As long as the receiving channel 211 and the collection cavity 60 can be communicated.

[0147] The number of second through holes 213 can be set as needed, and one or more second through holes 213 can be provided.

[0148] The second through hole 213 can be configured as a circular hole, a waist-shaped hole, a rectangular hole, etc.

[0149] Due to the limited space of the receiving channel 211, the exhaust of the first battery device 100 enters the receiving channel 211 and accumulates, and uneven pressure can cause the first wall 20a to deform. By forming a collection cavity 60 between the first end plate 40 and the second wall 20b, the collection cavity 60 and the receiving channel 211 are communicated through the second through hole 213, so that the receiving channel 211 can guide the exhaust to the collection cavity 60 through the second through hole 213, thereby alleviating the risk of the first wall 20a, and at the same time, the exhaust is away from the first battery monomer assembly 10a, reducing the influence of the exhaust temperature on the first battery monomer assembly 10a.

[0150] In some embodiments, the receiving channel 211 includes a plurality of sub-channels 2111, the plurality of sub-channels 2111 are arranged at intervals along the second direction X, each of the sub-channels 2111 extends along the third direction Y, the second through hole 213 is provided in plurality, and the plurality of second through holes 213 correspond to the plurality of sub-channels 2111 one by one, the first direction Z and the second direction X and the third direction Y are perpendicular to each other.

[0151] Understandably, each of the sub-channels 2111 is communicated with the collection cavity 60 through one of the second through holes 213.

[0152] In the present embodiment, the plurality of second through holes 213 correspond to the plurality of sub-channels 2111 one by one, so that each of the sub-channels 2111 can guide the discharge to the collection cavity 60 through the corresponding second through hole 213, and the flow guiding efficiency of the receiving channel 211 is greatly improved.

[0153] In some embodiments, along the first direction Z, the orthographic projection of the first end plate 40 on the first wall 20a is a first projection, and the orthographic projection of the second end plate 50 on the first wall 20a is a second projection. Along the third direction Y, the second through hole 213 is located on the side of the first projection away from the second projection.

[0154] Understandably, the first projection is located between the second projection and the first through hole 212.

[0155] In the present embodiment, by locating the second through hole 213 on the side of the first projection away from the second projection, the degree of shielding of the second through hole 213 by the first end plate 40 and the second wall 20b can be reduced, so that the discharge in the receiving channel 211 is more easily guided to the collection cavity 60 through the second through hole 213, and the flow guiding efficiency is improved.

[0156] In order to further improve the reliability of the battery device 100, it can be considered to discharge the discharge to the outside of the box 20. Therefore, in some embodiments, the battery device 100 can further include a pressure relief valve 70, the pressure relief valve 70 is arranged on the second wall 20b, and the pressure relief valve 70 is used to discharge the discharge collected by the collection cavity 60.

[0157] The pressure relief valve 70 includes but is not limited to a piston type pressure relief valve 70, a thimble type pressure relief valve 70, an electromagnetic pressure relief valve 70, etc. Specifically, the pressure relief valve 70 can include a valve body and a valve core (not shown in the figure), a mounting hole can be opened on the second wall 20b, the valve body is mounted in the mounting hole, the valve body has a pressure relief channel, and the valve core is used to close or open the pressure relief channel.

[0158] The pressure relief valve 70 can discharge the discharge collected by the collection cavity 60 out of the box 20, further improving the reliability of the battery device 100.

[0159] In some embodiments, the first end plate 40 is integrally formed with the thermal management component 30.

[0160] In the present embodiment, the first end plate 40 is integrally formed with the thermal management component 30, and the connection stability between the first end plate 40 and the thermal management component 30 is high. In addition, the assembly work of the first end plate 40 and the thermal management component 30 is omitted in the assembly process of the battery device 100, and the assembly efficiency of the battery device 100 can be improved.

[0161] In some embodiments, the second end plate 50 is integrally formed with the thermal management component 30.

[0162] In the present embodiment, the second end plate 50 is integrally formed with the thermal management component 30, and the connection stability between the second end plate 50 and the thermal management component 30 is high. In addition, the assembly work of the second end plate 50 and the thermal management component 30 is omitted in the assembly process of the battery device 100, and the assembly efficiency of the battery device 100 can be improved.

[0163] In some embodiments, the first end plate 40 is internally formed with a first cavity 41.

[0164] The first end plate 40 can be an expansion beam.

[0165] In the present embodiment, the first cavity 41 enables the first end plate 40 to have the ability to resist deformation, and the first end plate 40 can absorb external impact force, thereby improving the reliability of the battery device 100.

[0166] In some embodiments, the second end plate 50 is internally formed with a second cavity 51.

[0167] The second end plate 50 can be an expansion beam.

[0168] In the present embodiment, the second cavity 51 enables the second end plate 50 to have the ability to resist deformation, and the second end plate 50 can absorb external impact force, thereby improving the reliability of the battery device 100.

[0169] In some embodiments, the box body 20 further comprises a third wall 20c, which is located on the side of the second end plate 50 away from the first end plate 40 along the third direction Y, and the second end plate 50 is connected to the third wall 20c.

[0170] The second end plate 50 and the third wall 20c can be detachably connected. The detachable connection mode includes but is not limited to screwing, clamping, etc.

[0171] The second end plate 50 can abut against the third wall 20c.

[0172] In the embodiment, the third wall 20c is located on the side of the second end plate 50 away from the first end plate 40, that is, the second end plate 50 is arranged close to the third wall 20c, and the connection of the second end plate 50 to the third wall 20c can improve the structural stability of the battery device 100.

[0173] Referring to FIG. 8, in some embodiments, the box 20 further includes a fourth wall 20d and a fifth wall 20e opposite in the second direction X, one end of the thermal management component 30 is connected to the fourth wall 20d, and the other end is connected to the fifth wall 20e.

[0174] The connection mode of the thermal management component 30 to the fourth wall 20d includes but is not limited to screwing, clamping, etc.

[0175] The connection mode of the thermal management component 30 to the fifth wall 20e includes but is not limited to screwing, clamping, etc.

[0176] In the embodiment, one end of the thermal management component 30 is connected to the fourth wall 20d, and the other end is connected to the fifth wall 20e, which can improve the assembly stability of the thermal management component 30 and the box 20, and further improve the structural stability of the battery device 100.

[0177] Referring to FIG. 10, in some embodiments, along the second direction X, the thermal management component 30 can be provided with a first mounting member 43 on both sides, and the two ends of the thermal management component 30 are connected to the fourth wall 20d and the fifth wall 20e respectively through the first mounting member 43.

[0178] The first mounting member 43 can include a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are connected to form an L shape, the first connecting portion is connected to the thermal management component 30, and the second connecting portion is connected to the box 20.

[0179] Referring to FIG. 10, FIG. 8 and FIG. 3, in some embodiments, the inner side of the box 20 can also be provided with a second mounting member 25, the first mounting member 43 is provided with a first connecting hole, the second mounting member 25 is provided with a second connecting hole, and a locking member is arranged in the first connecting hole and the second connecting hole to connect the first mounting member 43 and the second mounting member 25, so as to realize the connection of the thermal management component 30 and the box 20. The locking member includes but is not limited to bolts, screws, etc.

[0180] Of course, in other embodiments, the thermal management component 30 can also be connected to only one of the fourth wall 20d and the fifth wall 20e.

[0181] In some embodiments, the first battery monomer assembly 10a and the second battery monomer assembly 10b are both connected to the thermal management component 30, and the thermal management component 30 is used to simultaneously carry the first battery monomer assembly 10a and the second battery monomer assembly 10b.

[0182] Understandably, the thermal management component 30 simultaneously adjusts the temperature of the first battery monomer assembly 10a and the second battery monomer assembly 10b, and simultaneously carries the first battery monomer assembly 10a and the second battery monomer assembly 10b.

[0183] In the embodiment, the thermal management component 30 is used to simultaneously carry the first battery monomer assembly 10a and the second battery monomer assembly 10b, that is, the thermal management component 30 simultaneously provides the first battery monomer assembly 10a and the second battery monomer assembly 10b with a force to overcome gravity.

[0184] Referring to FIG. 8, in some embodiments, along the first direction Z, the second battery monomer 1011b is provided with a second pressure relief mechanism 15b at one end away from the thermal management component 30.

[0185] The second pressure relief mechanism 15b is used to release the emissions of the second battery monomer 1011b when the temperature or pressure inside the second battery monomer 1011b reaches a threshold value. The structure of the second pressure relief mechanism 15b can be the same as or different from that of the first pressure relief mechanism 15a.

[0186] In the embodiment, the second pressure relief mechanism 15b is arranged at one end of the second battery monomer 1011b away from the thermal management component 30, so that the second pressure relief mechanism 15b is arranged away from the first battery monomer assembly 10a, reducing the impact of the emissions of the second battery monomer 1011b on the first battery monomer assembly 10a, and improving the reliability of the battery device 100.

[0187] Referring to FIG. 10, and in combination with FIG. 8, in the embodiment in which the battery device 100 includes the first end plate 40 and the second end plate 50, and the first end plate 40 and the second wall 20b form the collection cavity 60, the first end plate 40 can also be provided with a communication part 42, the communication part 42 penetrates through both sides of the first end plate 40 along the third direction Y, and the communication part 42 communicates the collection cavity 60, so that the emissions of the second battery monomer 1011b can also enter the collection cavity 60.

[0188] In some embodiments, the second battery monomer 1011b includes the second pressure relief mechanism 15b arranged on the side away from the first battery monomer 1011a.

[0189] In the embodiment, the second pressure relief mechanism 15b is arranged away from the first battery monomer assembly 10a, which can alleviate the impact of the emissions of the second battery monomer 1011b on the first battery monomer assembly 10a, and further improve the reliability of the battery device 100.

[0190] In some embodiments, along the first direction Z, the first battery monomer 1011a further comprises a first electrode terminal 14a arranged on the side facing away from the second battery monomer 1011b, and the second battery monomer 1011b further comprises a second electrode terminal 14b arranged on the side facing away from the first battery monomer 1011a.

[0191] In the embodiment, the first electrode terminal 14a is arranged away from the heat management component 30, facilitating heat exchange between the first battery monomer 1011a and the heat management component 30, and improving heat exchange efficiency. The second electrode terminal 14b is arranged away from the heat management component 30, facilitating heat exchange between the second battery monomer 1011b and the heat management component 30, and improving heat exchange efficiency.

[0192] In some embodiments, the first direction Z is parallel to the direction of gravity.

[0193] The first direction Z is parallel to the direction of gravity, i.e., the first battery monomer assembly 10a is located below the heat management component 30, and the second battery monomer assembly 10b is located above the heat management component 30. In this structure, the first wall 20a is arranged to accommodate the channel 211, which can especially alleviate the impact of the exhaust of the first battery monomer 1011a on the second battery monomer assembly 10b due to high temperature or high pressure.

[0194] The embodiments of the present application provide a power consumption device, which comprises the above-mentioned battery device 100, and the battery device 100 is used to supply power for the power consumption device.

[0195] Referring to FIGS. 2-10, the embodiments of the present application also provide a battery device 100, which comprises a box 20, a first battery monomer assembly 10a, a second battery monomer assembly 10b, a thermal management component 30, a first end plate 40, a second end plate 50, and a pressure relief valve 70. The box 20 comprises a bottom plate 21, a top cover 22, and a frame 23, the bottom of the frame 23 forms a first opening, the top of the frame 23 forms a second opening, the bottom plate 21 covers the first opening, and the top cover 22 covers the second opening. The bottom plate 21 is an extruded profile. The first battery monomer assembly 10a, the second battery monomer assembly 10b, the thermal management component 30, the first end plate 40, and the second end plate 50 are all accommodated in the box 20. The first battery monomer assembly 10a and the second battery monomer assembly 10b are arranged in a first direction Z, the thermal management component 30 is located between the first battery monomer assembly 10a and the second battery monomer assembly 10b, the second battery monomer assembly 10b is located above the thermal management component 30, and the first battery monomer assembly 10a is located below the thermal management component 30. In the first direction Z, the thermal management component 30 has a first surface 31 facing the first battery monomer assembly 10a and a second surface 32 facing the second battery monomer assembly 10b. The first battery monomer assembly 10a is in thermal conductive connection with the first surface 31, and the second battery monomer assembly 10b is in thermal conductive connection with the second surface 32. The thermal management component 30 is used to simultaneously bear the first battery monomer assembly 10a and the second battery monomer assembly 10b, and simultaneously adjust the temperature of the first battery monomer assembly 10a and the second battery monomer assembly 10b. The first battery monomer assembly 10a comprises a plurality of first battery monomer units 101a arranged in a second direction X, each first battery monomer unit 101a comprising a plurality of first battery monomers 1011a arranged in a third direction Y. The second battery monomer assembly 10b comprises a plurality of second battery monomer units 101b arranged in the second direction X, each second battery monomer unit 101b comprising a plurality of second battery monomers 1011b arranged in the third direction Y, the first direction Z, the second direction X, and the third direction Y being perpendicular to each other. The first end plate 40 and the second end plate 50 are arranged in the third direction Y, the thermal management component 30 connects the first end plate 40 and the second end plate 50, and the first end plate 40, the second end plate 50, and the thermal management component 30 are integrally formed. In the first direction Z, both ends of the first end plate 40 respectively extend beyond the first surface 31 and the second surface 32, and both ends of the second end plate 50 respectively extend beyond the first surface 31 and the second surface 32, the first battery monomer assembly 10a is located between the first end plate 40 and the second end plate 50, and the second battery monomer assembly 10b is located between the first end plate 40 and the second end plate 50. The first end plate 40 and the second end plate 50 are both expansion beams.The first battery monomer 1011a is provided with a first electrode terminal 14a at one end away from the thermal management component 30, and the second battery monomer 1011b is also provided with a second electrode terminal 14b at one end away from the thermal management component 30. The first battery monomer 1011a is provided with a first pressure relief mechanism 15a at one end close to the bottom plate 21, and the second battery monomer 1011b is provided with a second pressure relief mechanism 15b at one end away from the thermal management component 30. Along the second direction X, the two ends of the thermal management component 30 are respectively provided with first mounting parts 43, and the inner side of the frame 23 is provided with second mounting parts 25, which support the first mounting parts 43. The first mounting parts 43 are provided with first connecting holes, and the second mounting parts 25 are provided with second connecting holes opposite to the first connecting holes. The locking members are arranged in the first connecting holes and the second connecting holes to connect the first mounting parts 43 with the second mounting parts 25, so as to realize the connection of the thermal management component 30 and the frame 23. The outer side of the frame 23 is provided with third mounting parts 26 for connecting the vehicle body to realize the installation of the battery device 100. The second end plate 50 connects the frame 23. The box 20 includes a first wall 20a and a second wall 20b. Along the first direction Z, the first wall 20a is located on the side of the first battery monomer assembly 10a away from the thermal management component 30. Along the third direction Y, the second wall 20b is located on the side of the first end plate 40 away from the second end plate 50 and is spaced apart from the first end plate 40, and a collection cavity 60 is formed between the first end plate 40 and the second wall 20b. The inside of the first wall 20a is formed with a receiving channel 211, and the side of the first wall 20a facing the first battery monomer assembly 10a is provided with first through holes 212 opposite to the first pressure relief mechanisms 15a. The first through holes 212 communicate with the receiving channel 211, and the first through holes 212 are provided in plurality and correspond to the plurality of first battery monomers 1011a in one-to-one correspondence. The side of the first wall 20a facing the collection cavity 60 is provided with second through holes 213, and the collection cavity 60 communicates with the receiving channel 211 through the second through holes 213. The pressure relief valve 70 is arranged on the second wall 20b, and the pressure relief valve 70 is used for discharging the discharge of the collection cavity 60. Wherein, the first wall 20a is the bottom plate 21. The receiving channel 211 includes a plurality of sub-channels 2111, and the plurality of sub-channels 2111 are spaced apart along the second direction X. Each sub-channel 2111 extends along the third direction Y, and the plurality of sub-channels 2111 correspond to the plurality of first battery monomer units 101a in one-to-one correspondence. Each sub-channel 2111 is used for collecting the discharge of the first battery monomer unit 101a corresponding to the sub-channel 2111. The sub-channel 2111 is a cavity formed in the first wall 20a. The second through holes 213 are provided in plurality and correspond to the plurality of sub-channels 2111 in one-to-one correspondence. The orthographic projection of the first end plate 40 on the first wall 20a is a first projection, and the orthographic projection of the second end plate 50 on the first wall 20a is a second projection. Along the third direction Y, the second through holes 213 are located on the side of the first projection away from the second projection.

[0196] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict.

[0197] The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; a first battery monomer assembly and a second battery monomer assembly arranged in a first direction in the box body, the first battery monomer assembly comprising a plurality of first battery monomers, the second battery monomer assembly comprising a plurality of second battery monomers, the first battery monomer comprising a first pressure relief mechanism arranged on a side facing away from the second battery monomer; wherein a wall of the box body opposite to the first pressure relief mechanism is a first wall, the first wall having a receiving channel therein, the first wall being provided with a first through hole in communication with the receiving channel, the first through hole being opposite to the first pressure relief mechanism.

2. The battery device according to claim 1, characterized by The first through hole is provided with a plurality of first through holes corresponding to the plurality of first battery monomers.

3. The battery device of claim 2, wherein, The first battery monomer assembly comprises a plurality of first battery monomer units arranged in a second direction, each of the first battery monomer units comprising a plurality of first battery monomers arranged in a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

4. The battery device of claim 3, wherein The receiving channel comprises a plurality of sub-channels arranged in the second direction, each of the sub-channels extending in the third direction, the plurality of sub-channels corresponding to the plurality of first battery monomer units, and each of the sub-channels being used for collecting the exhaust of the first battery monomer unit corresponding to the sub-channel.

5. The battery device of claim 4, wherein, The first wall is an extruded profile, and the sub-channel is a cavity in the profile.

6. The battery device according to any one of claims 1 to 5, wherein The battery device further comprises: a heat management component arranged at least partially between the first battery monomer assembly and the second battery monomer assembly to regulate the temperature of the first battery monomer assembly and the second battery monomer assembly.

7. The battery device of claim 6, wherein The battery device further comprises: a first end plate and a second end plate accommodated in the box body, the first end plate and the second end plate being arranged in a third direction, the heat management component connecting the first end plate and the second end plate, the third direction being perpendicular to the first direction.

8. The battery device of claim 7, wherein, The heat management component has a first surface facing the first battery monomer assembly and a second surface facing the second battery monomer assembly, in the first direction, both ends of the first end plate exceeding the first surface and the second surface, both ends of the second end plate exceeding the first surface and the second surface, the first battery monomer assembly being located between the first end plate and the second end plate, and the second battery monomer assembly being located between the first end plate and the second end plate.

9. The battery device of claim 8, wherein, The box body further comprises a second wall, in the third direction, the second wall being located on a side of the first end plate away from the second end plate and being arranged in a spaced manner with the first end plate, a collection cavity being formed between the first end plate and the second wall; the first wall is provided with a second through hole, the collection cavity and the receiving channel being in communication through the second through hole.

10. The battery device of claim 9, wherein, The receiving channel comprises a plurality of sub-channels, the plurality of sub-channels are arranged in a second direction, each of the sub-channels extends in a third direction, the second through hole is provided in plurality, the plurality of second through holes correspond to the plurality of sub-channels one by one, the first direction, the second direction and the third direction are perpendicular to each other in pairs.

11. The battery device according to claim 9 or 10, characterized by In the first direction, the first end plate projects on the first wall as a first projection, and the second end plate projects on the first wall as a second projection. In the third direction, the second through hole is located on the side of the first projection away from the second projection.

12. The battery device according to any one of claims 9-11, characterized by The battery device further comprises: A pressure relief valve is arranged on the second wall, and the pressure relief valve is used to discharge the discharge of the collection cavity.

13. The battery device according to any one of claims 7 to 12, characterized by, The first end plate is integrally formed with the thermal management component; and / or, the second end plate is integrally formed with the thermal management component.

14. The battery device of any one of claims 7-13, wherein, The first end plate is integrally formed with the thermal management component; and / or, the second end plate is integrally formed with the thermal management component.

15. The battery device of any one of claims 7-14, wherein, The first end plate is integrally formed with the thermal management component; and / or, the second end plate is integrally formed with the thermal management component.

16. The battery device of any one of claims 7-15, wherein, The box further comprises a third wall, in the third direction, the third wall is located on the side of the second end plate away from the first end plate, and the second end plate is connected to the third wall.

17. The battery device of any one of claims 6-16, wherein, The box further comprises a fourth wall and a fifth wall opposite in the second direction, one end of the thermal management component is connected to the fourth wall, and the other end is connected to the fifth wall, and the second direction is perpendicular to the plane formed by the first direction and the third direction.

18. The battery device of any one of claims 1-17, wherein, The first battery monomer assembly and the second battery monomer assembly are both connected to the thermal management component, and the thermal management component is used to simultaneously carry the first battery monomer assembly and the second battery monomer assembly.

19. The battery device of claim 18, wherein, In the first direction, the second battery monomer comprises a second pressure relief mechanism arranged on the side away from the first battery monomer.

20. The battery device of any one of claims 1-19, wherein, In the first direction, the first battery monomer further comprises a first electrode terminal arranged on the side away from the second battery monomer, and the second battery monomer further comprises a second electrode terminal arranged on the side away from the first battery monomer.

21. An electrical device, comprising: The first direction is parallel to the direction of gravity. The battery device comprises the battery device of any one of claims 1-20, and the battery device is used to power the power device.

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