Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a first battery monomer assembly, a second battery monomer assembly and a box body, the first battery monomer assembly and the second battery monomer assembly are stacked in the box body along a first direction, the first battery monomer assembly comprises a plurality of first battery monomers, the second battery monomer assembly comprises a plurality of second battery monomers, and each first battery monomer comprises a first pressure relief mechanism arranged on one side deviating from the corresponding second battery monomer; wherein the wall body, opposite to the first pressure relief mechanism, of the box body is a first wall, a storage channel is formed in the first wall, a first through hole communicated with the storage channel is formed in the first wall, and the first through hole is opposite to the first pressure relief mechanism. The structure can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the technical field of battery devices, and more particularly, to a battery device and an electrical device. Background Art

[0002] 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 are environmentally friendly to society, and have been widely used in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swapping stations, engineering manufacturing, intelligent devices, etc. At the same time, it also promotes the technological development and research in the fields of communication terminals, medical devices, energy development, etc.

[0003] In battery device technology, how to improve the reliability of battery devices is a technical problem that needs to be solved urgently. Summary of the Utility Model

[0004] Embodiments of this application provide a battery device and an electrical device, which can effectively improve the reliability of the battery device.

[0005] 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 box body; the first battery cell assembly and the second battery cell assembly are stacked along a first direction in the box body. The first battery cell assembly includes a plurality of first battery cells, and the second battery cell assembly includes a plurality of second battery cells. The first battery cell includes a first pressure relief mechanism disposed on a side facing away from the second battery cell; wherein, a wall of the box body opposite to the first pressure relief mechanism is a first wall, a receiving channel is formed in the first wall, and a first through hole communicating with the receiving channel is formed on the first wall, and the first through hole is opposite to the first pressure relief mechanism.

[0006] In the above technical solution, a first pressure relief mechanism is disposed at one end of the first battery cell close to the first wall, so that the first pressure relief mechanism is far away from the second battery cell assembly, thereby alleviating the impact of the emissions of the first battery cell on the second battery cell assembly.

[0007] A receiving channel is formed inside the first wall, and a first through hole opposite to the first pressure relief mechanism is disposed on a side of the first wall facing the first battery cell assembly. The first through hole communicates with the receiving channel. In this way, when the first pressure relief mechanism is actuated, the emissions of the first battery cell can enter the receiving channel to a large extent through the first through hole, and the receiving channel collects the emissions of the first battery cell, thereby reducing or not impacting the second battery cell assembly, and thus improving the reliability of the battery device.

[0008] In some embodiments, a plurality of the first through-holes are provided, and the plurality of the first through-holes correspond to the plurality of the first battery cells one by one.

[0009] In the above technical solution, the plurality of the first through-holes correspond to the plurality of the first battery cells one by one, so that the emissions of each first battery cell can enter the storage channel through the corresponding first through-hole to a great extent, further reducing the impact of the emissions of the first cell on the second battery cell assembly.

[0010] In some embodiments, the first battery cell assembly includes a plurality of first battery cell units, the plurality of first battery cell units are arranged along a second direction, each first battery cell unit includes a plurality of the first battery cells arranged along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0011] In the above technical solution, in the case where the plurality of the first through-holes correspond to the plurality of the first battery cells one by one, the plurality of first battery cell units are arranged along the second direction, and each first battery cell unit includes a plurality of the first battery cells arranged along the third direction. In this arrangement, the first through-holes can also form a corresponding layout, which is beneficial to the arrangement of the first through-holes and reduces the difficulty of arranging the first through-holes.

[0012] In some embodiments, the storage channel includes a plurality of sub-channels, the plurality of sub-channels are arranged at intervals along the second direction, each sub-channel extends along the third direction, the plurality of sub-channels correspond to the plurality of first battery cell units one by one, and each sub-channel is used to collect the emissions of the first battery cell unit corresponding to the sub-channel.

[0013] In the above technical solution, each sub-channel is used to collect the emissions of the first battery cell unit corresponding to the sub-channel. The advantage is that when a first battery cell in one of the first battery cell units is thermally out of control, the emissions of the thermally out-of-control first battery cell enter the corresponding first sub-through-hole, which can reduce the impact of the emissions on the adjacent battery cell units and improve the reliability of the battery device.

[0014] In some embodiments, the first wall is an extruded profile, and the sub-channel is a cavity in the profile.

[0015] In the above technical solution, the first wall being an extruded profile can obtain a first wall with relatively high structural strength. The sub-channel is a cavity in the profile, that is, the cavity of the first wall is used as the storage channel, which saves the preparation process of the storage channel, reduces the preparation difficulty of the sub-channel, and can improve the production efficiency.

[0016] In some embodiments, the battery device further includes a thermal management component, at least a part of the thermal management component is disposed between the first battery cell assembly and the second battery cell assembly to adjust the temperatures of the first battery cell assembly and the second battery cell assembly.

[0017] In the above technical solution, the thermal management component adjusts the temperatures of the first battery cell assembly and the second battery cell assembly. The first battery cell assembly and the second battery cell assembly share the thermal management component, and there is no need to separately configure a thermal management component for each battery cell assembly. Therefore, the number of components is simplified, and the utilization rate of the thermal management component is higher.

[0018] In an embodiment where the first battery assembly and the second battery cell assembly are stacked along the gravity direction, the first battery cell assembly and the second battery cell assembly share the thermal management component, which facilitates the inversion of the first battery cell assembly, so that the first pressure relief mechanism of the first battery cell faces downward, enabling the first pressure relief mechanism to relieve pressure in a direction away from the second battery cell assembly.

[0019] In some embodiments, the battery device further includes a first end plate and a second end plate. The first end plate and the second end plate are accommodated in the box body. The first end plate and the second end plate are spaced apart along a third direction, and the thermal management component is connected to the first end plate and the second end plate. The third direction is perpendicular to the first direction.

[0020] In the above technical solution, the thermal management component is connected to the first end plate and the second end plate. 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 body, thereby improving the overall stability and rigidity of the battery device.

[0021] In some embodiments, the thermal management component has a first surface facing the first battery cell assembly and a second surface facing the second battery cell assembly. Along the first direction, both ends of the first end plate respectively extend beyond the first surface and the second surface, and both ends of the second end plate respectively extend beyond the first surface and the second surface. The first battery cell assembly is located between the first end plate and the second end plate, and the second battery cell assembly is located between the first end plate and the second end plate.

[0022] In the above technical solution, both ends of the first end plate extend beyond the first surface and the second surface respectively, that is, both ends of the first end plate along the first direction extend beyond the thermal management component respectively, and both ends of the second end plate along the first direction extend beyond the thermal management component respectively. The first battery cell assembly is located between the first end plate and the second end plate, which can alleviate the movement of the first battery cell assembly in the second direction, and the second battery cell assembly is located between the first end plate and the second end plate, which can alleviate the movement of the second battery cell assembly in the second direction, thereby improving the structural stability of the battery device.

[0023] In some embodiments, the box body also includes a second wall. Along the third direction, 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. A collecting chamber is formed between the first end plate and the second wall. The first wall is provided with a second through hole, and the collecting chamber is connected to the storage channel through the second through hole.

[0024] In the above technical solution, due to the limited space of the storage channel, the discharge of the first battery device enters the storage channel and accumulates, and the uneven pressure will 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 storage channel are connected through the second through hole, so that the storage channel can guide the discharge to the collection cavity through the second through hole, thereby alleviating the risk of deformation of the first wall, and at the same time keeping the discharge away from the first battery monomer assembly, reducing the impact of the discharge temperature on the first battery monomer assembly.

[0025] In some embodiments, the storage channel includes a plurality of sub-channels, the plurality of sub-channels are arranged at intervals along the second direction, each of the sub-channels extends along the third direction, a plurality of second through holes are provided, a plurality of the second through holes correspond one-to-one to a plurality of the sub-channels, and the first direction, the second direction and the third direction are perpendicular to each other.

[0026] In the above technical solution, the multiple second through holes correspond one-to-one to the multiple sub-channels, so that each sub-channel can guide the discharge to the collection chamber through the corresponding second through hole, thereby greatly improving the guiding efficiency of the receiving channel.

[0027] In some embodiments, along the first direction, the orthographic projection of the first end plate on the first wall is a first projection, and the orthographic 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.

[0028] In the above technical solution, by locating the second through hole on the side of the first projection away from the second projection, the degree of shielding of the second through hole by the first end plate and the second wall can be reduced, so that the discharge in the receiving channel can be more easily guided to the collection chamber through the second through hole, thereby improving the guidance efficiency.

[0029] In some embodiments, the battery device further includes a pressure relief valve disposed on the second wall, and the pressure relief valve is used to discharge the exhaust from the collection chamber.

[0030] In the above technical solution, the pressure relief valve can discharge the emissions collected in the collection chamber out of the box body, further improving the reliability of the battery device.

[0031] 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.

[0032] In the above technical solution, the first end plate and the thermal management component are integrally formed, 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 omitted in the battery device assembly process, which can improve the battery device assembly efficiency.

[0033] The second end plate and the thermal management component are integrally formed, 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 omitted in the battery device assembly process, which can improve the battery device assembly efficiency.

[0034] In some embodiments, a first cavity is formed inside the first end plate; and / or a second cavity is formed inside the second end plate.

[0035] In the above technical solution, the first cavity enables the first end plate to resist deformation, and the first end plate can absorb external impact force, thereby improving the reliability of the battery device.

[0036] The second cavity enables the second end plate to resist deformation, and the second end plate can absorb external impact force, thereby improving the reliability of the battery device.

[0037] In some embodiments, the box body further includes a third wall, and along the third direction, the third wall is located on a side of the second end plate away from the first end plate, and the second end plate is connected to the third wall.

[0038] In the above technical solution, the third wall is located on the side of the second end plate away from the first end plate, that is, the second end plate is arranged close to the third wall, and the second end plate is connected to the third wall to improve the structural stability of the battery device.

[0039] In some embodiments, the box body also includes a fourth wall and a fifth wall opposite to each other along a 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.

[0040] In the above technical solution, one end of the thermal 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 thermal management component and the box body, and further improve the structural stability of the battery device.

[0041] In some embodiments, the first battery cell assembly and the second battery cell assembly are both connected to the thermal management component, and the thermal management component is used to carry the first battery cell assembly and the second battery cell assembly simultaneously.

[0042] In the above technical solution, the thermal management component is used to carry the first battery cell assembly and the second battery cell assembly simultaneously, that is, the thermal management component provides the acting force to overcome gravity for the first battery cell assembly and the second battery cell assembly at the same time.

[0043] In some embodiments, along the first direction, the second battery cell includes a second pressure relief mechanism disposed on a side facing away from the first battery cell.

[0044] In some embodiments, a second pressure relief mechanism is disposed at an end of the second battery cell away from the thermal management component.

[0045] In the above technical solution, the second pressure relief mechanism is disposed at an end of the second battery cell away from the thermal management component, so that the second pressure relief mechanism is disposed away from the first battery cell assembly, reducing the impact of the emissions of the second battery cell on the first battery cell assembly, and improving the reliability of the battery device.

[0046] In some embodiments, along the first direction, the first battery cell further includes a first electrode terminal disposed on a side facing away from the second battery cell, and the second battery cell further includes a second electrode terminal disposed on a side facing away from the first battery cell.

[0047] In the above technical solution, the first electrode terminal is disposed away from the thermal management component, facilitating heat exchange between the first battery cell and the thermal management component and improving the heat exchange efficiency. The second electrode terminal is disposed away from the thermal management component, facilitating heat exchange between the second battery cell and the thermal management component and improving the heat exchange efficiency.

[0048] In some embodiments, the first direction is parallel to the direction of gravity.

[0049] In the above technical solution, the first direction is parallel to the direction of gravity, that is, the first battery cell assembly is located below the thermal management component, and the second battery cell assembly is located above the thermal management component. In this structure, the first wall is provided with a receiving channel, which can especially relieve the upward impact of the emissions of the first battery cell on the second battery cell assembly due to high temperature or high pressure.

[0050] An embodiment of the present application provides an electrical device, including the battery device of any of the above embodiments, and the battery device is used to supply power to the electrical device. Description of the Drawings

[0051] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use 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 should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0052] Figure 1 Structural schematic diagram of a vehicle according to some embodiments of the present application;

[0053] Figure 2 Structural schematic diagram of a battery device according to some embodiments of the present application from one perspective;

[0054] Figure 3 Exploded schematic diagram of a battery device according to some embodiments of the present application;

[0055] Figure 4 Exploded schematic diagram of a battery cell according to some embodiments of the present application;

[0056] Figure 5 Structural schematic diagram of a battery device according to some embodiments of the present application from another perspective;

[0057] Figure 6 For Figure 5 Cross-sectional view along A-A;

[0058] Figure 7 For Figure 6 Enlarged view of part A in

[0059] Figure 8 For Figure 5 Cross-sectional view along C-C;

[0060] Figure 9 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;

[0061] Figure 10 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.

[0062] Icons: 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 body; 24 - seal; 25 - second mounting member; 26 - third mounting member; 20a - first wall; 20b - second wall; 20c - third wall; 20d - fourth wall; 20e - fifth wall; 211 - storage 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 part; 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.

[0063] The drawings are not drawn to scale. Detailed implementation manners

[0064] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0066] References to "embodiments" in this application mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0067] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect", "join", and "attach" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In the description of this application, it should be noted that unless otherwise stated, "a plurality of" means two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0069] The term "and / or" in this application is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, B exists alone, and A and B exist simultaneously.

[0070] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed descriptions of the same components are omitted. It should be understood that the thicknesses, lengths, widths, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0071] The "a plurality of" that appears in this application refers to two or more (including two).

[0072] In this application, the battery cell may include, but is not limited to, lithium-ion secondary battery devices, lithium-ion primary battery devices, lithium-sulfur battery devices, sodium-lithium-ion battery devices, sodium-ion battery devices, magnesium-ion battery devices, etc. The battery cell includes, but is not limited to, cylinders, flat bodies, cuboids, or other shapes, etc. Generally, the battery cell includes cylindrical battery cells, square battery cells, pouch battery cells, etc. in a packaged manner.

[0073] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. Metal ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can play a role in preventing the positive electrode sheet and the negative electrode sheet from short-circuiting to a certain extent, and at the same time can allow active ions to pass through.

[0074] 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. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer. The positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode tab.

[0075] Taking the lithium-ion battery device as an example, the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, etc. The positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as substrates of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0076] 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. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer. The negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode tab.

[0077] The negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. can be used. The negative electrode active material can be carbon or silicon, etc.

[0078] To ensure, to a certain extent, that a large current can pass through without fusing, the number of positive electrode tabs is multiple and they are stacked together, and the number of negative electrode tabs is multiple and they are stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be of a wound structure or a laminated structure.

[0079] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0080] In some embodiments, the battery apparatus refers to an energy storage device, and the energy storage device includes an energy storage box body, and a door is provided on at least one side of the energy storage box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0081] The pressure relief mechanism mentioned in the embodiments of the present application refers to an element or component that actuates to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. This threshold design varies according to different design requirements. The threshold may depend on one or several of the materials of the positive electrode plate, negative electrode plate, electrolyte and separator in the battery cell. The pressure relief mechanism can be in the form of, for example, an explosion-proof valve, an explosion-proof sheet, a gas valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, 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 damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0082] The "actuation" mentioned in the present application means that the pressure relief mechanism generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The actions generated by the pressure relief mechanism may include, but are not limited to: at least a part of the pressure relief mechanism ruptures, breaks, is 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 emissions. In this way, the battery cell can be depressurized and cooled under a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0083] The emissions from the battery cell mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0084] The development of battery device technology needs to consider various design factors simultaneously. For example, performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the reliability of the battery device also needs to be considered.

[0085] In battery device technology, two battery cell components are stacked to improve space utilization. In a battery device with this structure, the emissions of the battery cells in the two battery cell components are likely to impact each other. Especially in the structure where the two battery cell components are stacked vertically, the emissions of the lower battery cell component will directly impact the upper battery cell component under the action of high temperature or high pressure, causing secondary hazards and reducing the reliability of the battery device.

[0086] In view of this, in order to solve the problem that the emissions of one battery cell component impact another battery cell component in a battery device composed of two battery cell components, resulting in a reduction in the reliability of the battery device, the embodiments of the present application provide a technical solution. In this technical solution, it is considered to arrange the pressure relief mechanism of the battery cells in one of the battery cell components on the side facing away from the other battery cell component, and a storage channel is arranged on the wall of the box body close to the pressure relief structure, so that the emissions of the battery cells in this battery cell component enter the storage channel, thereby reducing or not impacting the other battery cell component, and thus improving the reliability of the battery device.

[0087] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices. For example, mobile phones, portable devices, laptop computers, battery cars, electric toys, power tools, vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spaceships, etc.

[0088] For the convenience of description, the following embodiments take the electrical device as vehicle 1000 as an example for illustration.

[0089] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of vehicle 1000 according to some embodiments of the present application. A battery device 100 is arranged inside vehicle 1000, and the battery device 100 can be arranged at the bottom, head, or tail of vehicle 1000. The battery device 100 can be used for power supply of vehicle 1000. For example, the battery device 100 can be used as the operating power source of vehicle 1000.

[0090] Vehicle 1000 may further include a controller 300 and a motor 200. The controller 300 is used to control the battery device 100 to supply power to the motor 200. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1000.

[0091] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0092] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 2 which is a schematic structural diagram of the battery device 100 according to some embodiments of the present application from a perspective; Figure 3 which is an exploded schematic diagram of the battery device 100 according to some embodiments of the present application. The battery device 100 includes a plurality of battery cells 10. The plurality of battery cells 10 can be connected in series, in parallel, or in a series-parallel combination. Among them, the series-parallel combination means that there are both series and parallel connections among the plurality of battery cells 10.

[0093] In some embodiments, the battery device 100 may further include a busbar component (not shown in the figure), and the plurality of battery cells 10 can be electrically connected through the busbar component to achieve series, parallel, or series-parallel connection of the plurality of battery cells 10.

[0094] The busbar component can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0095] In some embodiments, the battery device 100 may further include a box body 20 for accommodating the battery cells 10. The box body 20 may include a bottom plate 21, a top cover 22, and a frame body 23. The bottom wall of the frame body 23 forms a first opening, and the top of the frame body 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 cells 10.

[0096] The bottom plate 21 and the frame body 23 can be connected by welding, bolt fastening, etc. to form the lower box body 20. The top cover 22 and the frame body 23 can be bolt-fastened, which is convenient for disassembling the top cover 22. The connection between the top cover 22 and the frame body 23 can be sealed by a sealing member 24 (not shown in the figure), and the sealing element can be a sealing ring, sealant, etc.

[0097] Among them, the bottom plate 21 and the top cover 22 can be of 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, then a box body 20 with an accommodation space is formed. Of course, it can also be that the top cover 22 is a hollow structure with one side open, the bottom plate 21 is a plate-like 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, thereby forming a box body 20 with an accommodation space.

[0098] In some other embodiments, the housing 23 may not be provided. For example, the bottom plate 21 and the top cover 22 are covered with 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 is also sealed by a sealing element, and the sealing element may be a sealing ring, a sealant, etc.

[0099] Please refer to Figure 4 , Figure 4 which is an exploded view of the battery cell 10 according to some embodiments of the present application. The battery cell 10 may include a housing 11, an electrode assembly 13, an end cap 12, an electrode terminal 14, a pressure relief mechanism 15, and other functional components.

[0100] The housing 11 is a component for receiving the electrode assembly 13. The housing 11 may be a hollow structure with an opening formed at one end, or the housing 11 may be a hollow structure with openings formed at both ends. The material of the housing 11 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The housing 11 may be in various shapes, such as a cylinder, a cuboid, etc. Exemplarily, in Figure 3 it, the housing 11 is a cuboid.

[0101] The end cap 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 cap 12 covers the opening of the housing 11, and the end cap 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 cap 12 may be adapted to the shape of the housing 11. For example, if the housing 11 is a cuboid structure, the end cap 12 is a rectangular plate-like structure adapted to the housing 11. Another example is that if the housing 11 is a cylinder structure, the end cap 12 is a circular plate-like structure adapted to the housing 11. The material of the end cap 12 may also be various. Exemplarily, the end cap 12 may be made of a metal material, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 12 and the material of the housing 11 may be the same or different.

[0102] In the battery cell 10, there may be one or two end caps 12. If the housing 11 is a hollow structure with an opening formed at one end, then one end cap 12 is correspondingly provided; if the housing 11 is a hollow structure with openings formed at both ends, then two end caps 12 are correspondingly provided, and the two end caps 12 respectively cover the two openings of the housing 11.

[0103] The pressure relief mechanism 15 may be provided on the end cap 12. The pressure relief mechanism 15 is used to release the emissions of the battery cell 10 when the temperature or pressure inside the battery cell 10 reaches a threshold value.

[0104] The electrode terminal 14 is a bridge for connecting the internal electrode of the battery cell 10 to the external circuit, and the electrode terminal 14 can realize the 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.

[0105] An embodiment of the present application provides a battery device 100, which can improve the reliability of the battery device 100. The specific structure of the battery device 100 will be described in detail below with reference to the accompanying drawings.

[0106] Figure 5 It is a schematic structural view of the battery device 100 according to some embodiments of the present application from another perspective; Figure 6 is Figure 5 a cross-sectional view taken along A-A; Figure 7 is Figure 6 an enlarged view of part A in Figure 8 is Figure 5 a cross-sectional view taken along C-C.

[0107] An embodiment of the present application provides a battery device 100. Referring to Figure 3 , the battery device 100 includes a first battery cell assembly 10a, a second battery cell assembly 10b, and a box body 20. The first battery cell assembly 10a and the second battery cell assembly 10b are stacked in the first direction Z in the box body 20. The first battery cell assembly 10a includes a plurality of first battery cells 1011a, and the second battery cell assembly 10b includes a plurality of second battery cells 1011b. The first battery cell 1011a includes a first pressure relief mechanism 15a provided on the side facing away from the second battery cell 1011b. Wherein, the wall of the box body 20 opposite to the first pressure relief mechanism 15a is the first wall. A receiving channel 211 is provided in the first wall 20a, and a first through hole communicating with the receiving channel 211 is opened on the first wall 20a. The first through hole 212 faces the first pressure relief mechanism 15a.

[0108] The first battery cell assembly 10a and the second battery cell assembly 10b are stacked in the first direction Z. The first direction Z can be the gravity direction, a direction with a certain angle to the gravity direction, or a horizontal direction. If the first direction Z is the gravity direction, the first battery cell assembly 10a and the second battery cell assembly 10b are stacked up and down. If the first direction Z is the horizontal direction, the first battery cell assembly 10a and the second battery cell assembly 10b are stacked horizontally. Exemplarily, as Figure 3 shown, the first battery cell assembly 10a and the second battery cell assembly 10b are stacked up and down, with the first battery cell assembly 10a at the bottom and the second battery cell assembly 10b at the top.

[0109] The first battery cell assembly 10a may further include a plurality of first battery cell units 101a, which are arranged along the second direction X. Each first battery cell unit 101a includes a plurality of first battery cells 1011a arranged along the third direction Y. Correspondingly, the second battery cell assembly 10b may further include a plurality of second battery cell units 101b, which are arranged along the second direction X. Each second battery cell unit 101b includes a plurality of second battery cells 1011b arranged along the third direction Y. Exemplarily, as Figure 3 shown, the first battery cell assembly 10a includes three first battery cell units 101a, and the second battery cell assembly 10b includes three second battery cell units 101b.

[0110] The first wall 20a corresponds to the position of the first battery cell assembly 10a. The first wall 20a may be the bottom plate 21, or the first wall 20a may also be other wall portions of the box body 20.

[0111] A storage channel 211 is formed inside the first wall 20a. The storage channel 211 is a channel for collecting the emissions of the first battery cells 1011a when the first pressure relief mechanism 15a is actuated. The emissions may be stored in the storage channel 211, or the emissions may also be diverted outside the box body 20 through the storage channel 211.

[0112] The first wall 20a may be formed by laminating two plate bodies. A groove is stamped on one of the plate bodies, and the other plate body covers the groove to form the storage channel 211. The first wall 20a may also be formed by extrusion molding or injection molding, etc. The first wall 20a may form the storage channel 211 inside during a single manufacturing process.

[0113] The first pressure relief mechanism 15a is disposed opposite to the first through hole 212. Among them, one first pressure relief mechanism 15a may correspond to one first through hole 212, or one pressure relief mechanism 15 may correspond to two or more first through holes 212. It is also possible that one first through hole 212 corresponds to two, three, etc. first pressure relief mechanisms 15a.

[0114] In this embodiment, the first pressure relief mechanism 15a is disposed at one end of the first battery cell 1011a close to the first wall 20a, so that the first pressure relief mechanism 15a is far away from the second battery cell assembly 10b, thereby alleviating the impact of the emissions of the first battery cells 1011a on the second battery cell assembly 10b.

[0115] An accommodation channel 211 is formed inside the first wall 20a. A first through hole 212 opposite to the first pressure relief mechanism 15a is provided on the side of the first wall 20a facing the first battery cell assembly 10a. The first through hole 212 communicates with the accommodation channel 211. In this way, when the first pressure relief mechanism 15a is actuated, the emissions of the first battery cell 1011a can enter the accommodation channel 211 to a greater extent through the first through hole 212, thereby impacting the second battery cell assembly 10b less or not at all, and thus the reliability of the battery device 100 can be improved.

[0116] Referring to Figure 3 , in some embodiments, a plurality of first through holes 212 are provided, and the plurality of first through holes 212 correspond to the plurality of first battery cells 1011a one by one.

[0117] It can be understood that the plurality of first through holes 212 correspond to the battery cells 10 provided with the first pressure relief mechanism 15a one by one.

[0118] The first through hole 212 can be configured as a circular hole, a rectangular hole, a waist-shaped hole, etc.

[0119] In this embodiment, the plurality of first through holes 212 correspond to the plurality of first battery cells 1011a one by one, so that the emissions of each first battery cell 1011a can enter the accommodation channel 211 to a greater extent through the corresponding first through hole 212, further reducing the impact of the emissions of the first cell on the second battery cell assembly 10b.

[0120] In some embodiments, a plurality of first through holes 212 are provided, and the plurality of first through holes 212 correspond to the plurality of first battery cells 1011a one by one. The first battery cell assembly 10a includes a plurality of first battery cell units 101a, and the plurality of first battery cell units 101a are arranged along the second direction X. Each first battery cell unit 101a includes a plurality of first battery cells 1011a arranged along the third direction Y. The first direction Z, the second direction X, and the third direction Y are perpendicular to each other in pairs.

[0121] In the case where the plurality of first through holes 212 correspond to the plurality of first battery cells 1011a one by one, the plurality of first battery cell units 101a are arranged along the second direction X, and each first battery cell unit 101a includes a plurality of first battery cells 1011a arranged along the third direction Y. In this arrangement, the first through holes 212 can also form a corresponding layout, which is beneficial to the arrangement of the first through holes 212 and reduces the difficulty of arranging the first through holes 212.

[0122] Referring to Figure 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 sub-channel 2111 extends along the third direction Y, and the plurality of sub-channels 2111 correspond to the plurality of first battery cell units 101a one by one. Each sub-channel 2111 is used to collect the emissions of the first battery cell unit 101a corresponding to the sub-channel 2111.

[0123] Understandably, in this embodiment, one sub-channel 2111 corresponds to one battery cell 10 component. Exemplarily, as Figure 3 and Figure 8 shown, the first battery cell assembly 10a includes three first battery cell units 101a, and the receiving channel 211 includes three sub-channels 2111.

[0124] It should be understood that in other embodiments, the plurality of sub-channels 2111 and the plurality of first battery cell units 101a may not be in a one-to-one correspondence relationship. For example, two or more sub-channels 2111 may correspond to one first battery cell unit 101a, or two or more first battery cell units 101a may correspond to one sub-channel 2111.

[0125] Each sub-channel 2111 may extend linearly along the third direction Y, and the cross-section of the sub-channel 2111 (the cross-section in the XZ plane) may be configured as a rectangle, an arc, or a special shape, etc.

[0126] In this embodiment, each sub-channel 2111 is used to collect the emissions of the first battery cell unit 101a corresponding to the sub-channel 2111. The advantage is that when the first battery cell 1011a in one of the first battery cell units 101a undergoes thermal runaway, the emissions of the thermally runaway first battery cell 1011a enter the corresponding first through-hole, which can reduce the impact of the emissions on the adjacent battery cell 10 components and improve the reliability of the battery device 100.

[0127] In some embodiments, the first wall 20a is an extruded profile, and the sub-channel 2111 is a cavity inside the profile.

[0128] The first wall 20a being an extruded profile can obtain a first wall 20a with relatively high structural strength. The sub-channel 2111 is a cavity inside the profile, that is, the cavity is used as the receiving channel 211. The receiving channel 211 and the first wall 20a are prepared and formed at one time, which saves the preparation process of the receiving channel 211, reduces the preparation difficulty of the sub-channel 2111, and can improve production efficiency.

[0129] In some embodiments, the battery device 100 further includes a thermal management component 30, and at least a part 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 temperatures of the first battery cell assembly 10a and the second battery cell assembly 10b.

[0130] Understandably, 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 between the first battery cell assembly 10a and the second battery cell assembly 10b, the number of thermal management components 30 is reduced.

[0131] The thermal management component 30 is a component for accommodating a fluid to regulate the temperatures of the first battery cell assembly 10a and the second battery cell assembly 10b.

[0132] The fluid here can be a liquid or a gas, and regulating the temperature means heating or cooling a 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 accommodate a cooling fluid to lower the temperature of a 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, a cooling plate, etc., and the fluid it accommodates can also be referred to as a cooling medium or a cooling fluid, and more specifically, it can be referred to as a coolant or a cooling gas. In addition, the thermal management component 30 can also be used for heating to raise the temperature of a plurality of battery cells 10. Optionally, the fluid can flow in a cycle to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0133] The first battery cell assembly 10a can be connected to the thermal management component 30 through a thermal conductive adhesive, and the second battery cell assembly 10b can be connected to the thermal management component 30 through a thermal conductive adhesive.

[0134] Figure 9 Schematic assembly diagrams 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; Figure 10 Schematic assembly diagrams 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.

[0135] Refer to Figure 9 and Figure 10 , in some embodiments, the battery device 100 further includes a first end plate 40 and a second end plate 50. The first end plate 40 and the second end plate 50 are accommodated in the box body 20. The first end plate 40 and the second end plate 50 are spaced apart along a third direction Y, and the thermal management component 30 is connected to the first end plate 40 and the second end plate 50. The third direction Y is perpendicular to the first direction Z.

[0136] The materials of the first end plate 40 and the thermal management component 30 may be the same or different, and the materials of the second end plate 50 and the thermal management component 30 may be the same or different.

[0137] In some embodiments, the thermal management component 30 may 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 may extend beyond the thermal management component 30, and both ends of the second thermal management component 30 may also extend beyond the thermal management component 30. 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 Figure 9 and Figure 10 shown). In some embodiments, along the thickness direction of the thermal management component 30, only the end of the first thermal management component 30 close to the first wall 20a may extend beyond the thermal management component 30, and only the end of the second thermal management component 30 close to the first wall 20a may extend beyond the thermal management component 30. 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).

[0138] The first end plate 40, the thermal management component 30, and the second end plate 50 may be integrally formed to improve the connection strength. The first end plate 40, the thermal management component 30, and the second end plate 50 may be integrally formed by extrusion process, injection molding process, etc. The first end plate 40, the thermal management component 30, and the second end plate 50 may also be separately prepared and then fixedly connected. The first end plate 40, the thermal management component 30, and the second end plate 50 may be fixedly connected by bonding, welding, etc.

[0139] In this embodiment, the thermal management component 30 connects the first end plate 40 and the second end plate 50. 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 overall stability and rigidity of the battery device 100.

[0140] In some embodiments, the thermal management component 30 has a first surface 31 facing the first battery cell assembly 10a and a second surface 32 facing the second battery cell assembly 10b. Along 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 cell assembly 10a is located between the first end plate 40 and the second end plate 50, and the second battery cell assembly 10b is located between the first end plate 40 and the second end plate 50.

[0141] In the embodiment where the first direction Z is parallel to the gravity direction, 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.

[0142] Both ends of the first end plate 40 extend beyond the first surface 31 and the second surface 32, respectively, that is, both ends of the first end plate 40 along the first direction Z extend beyond the thermal management component 30, and both ends of the second end plate 50 along the first direction Z extend beyond the thermal management component 30. The first battery cell 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 cell assembly 10a in the second direction X. The second battery cell 1011b is located between the first end plate 40 and the second end plate 50, which can alleviate the movement of the second battery cell assembly 10b in the second direction X, thereby improving the structural stability of the battery device 100.

[0143] Reference Figure 6 In some embodiments, the box body 20 further includes a second wall 20b and a third wall 20c, the second wall 20b and the third wall 20c are arranged opposite to each other along the third direction Y, and the first end plate 40 and the second end plate 50 are located between the second wall 20c and the third wall 20c.

[0144] Reference Figure 6 and Figure 3 In some embodiments, the box body 20 further includes a second wall 20b. 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. A collecting chamber 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 collecting chamber 60 is communicated with the receiving channel 211 through the second through hole 213.

[0145] The first wall 20a is provided with a second through hole 213, and the second through hole 213 is used to connect the receiving channel 211 with the collecting chamber 60. The second through hole 213 can be provided on a side of the first wall 20a facing the first battery monomer assembly 10a (such as Figure 6 and Figure 3 The second through hole 213 may also be disposed on the end wall of the first wall 20a close to the second wall 20b, as long as the receiving channel 211 is connected to the collecting chamber 60.

[0146] The number of the second through holes 213 can be set as needed, and one or more second through holes 213 can be provided.

[0147] The second through hole 213 may be configured as a circular hole, a waist-shaped hole, a rectangular hole, or the like.

[0148] Due to the limited space of the storage channel 211, the emissions of the first battery device 100 enter the storage channel 211 and accumulate. Uneven pressure can cause the deformation of the first wall 20a. By forming a collection cavity 60 between the first end plate 40 and the second wall 20b, and connecting the collection cavity 60 with the storage channel 211 through the second through hole 213, the storage channel 211 can divert the emissions to the collection cavity 60 through the second through hole 213, thus alleviating the risk of the first wall 20a and keeping the emissions away from the first battery cell assembly 10a, reducing the impact of the emissions temperature on the first battery cell assembly 10a.

[0149] In some embodiments, the storage channel 211 includes a plurality of sub-channels 2111, which are arranged at intervals along the second direction X. Each sub-channel 2111 extends along the third direction Y. There are a plurality of second through holes 213, and the plurality of second through holes 213 correspond to the plurality of sub-channels 2111 one by one. The first direction Z, the second direction X, and the third direction Y are perpendicular to each other in pairs.

[0150] Understandably, each sub-channel 2111 is connected to the collection cavity 60 through a second through hole 213.

[0151] In this embodiment, the plurality of second through holes 213 correspond to the plurality of sub-channels 2111 one by one. In this way, each sub-channel 2111 can divert the emissions to the collection cavity 60 through the corresponding second through hole 213, greatly improving the diversion efficiency of the storage channel 211.

[0152] In some embodiments, along the first direction Z, the orthographic projection of the first end plate 40 on the first wall 20a is the first projection, and the orthographic projection of the second end plate 50 on the first wall 20a is the 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.

[0153] Understandably, the first projection is located between the second projection and the first through hole 212.

[0154] In this embodiment, by making the second through hole 213 located on the side of the first projection away from the second projection, the shielding degree of the first end plate 40 and the second wall 20b on the second through hole 213 can be reduced, so that the emissions in the storage channel 211 are more likely to be diverted to the collection cavity 60 through the second through hole 213, improving the diversion efficiency.

[0155] To further improve the reliability of the battery device 100, it can be considered to discharge the emissions outside the box body 20. Therefore, in some embodiments, the battery device 100 may further include a pressure relief valve 70, which is arranged on the second wall 20b and is used to discharge the emissions in the collection cavity 60.

[0156] The pressure relief valve 70 includes but is not limited to a piston-type pressure relief valve 70, a pin-type pressure relief valve 70, an electromagnetic pressure relief valve 70, etc. Specifically, the pressure relief valve 70 may include a valve body and a valve core (not shown in the figure), a mounting hole may be provided in 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.

[0157] The pressure relief valve 70 can discharge the exhaust collected in the collection chamber 60 out of the housing 20 , further improving the reliability of the battery device 100 .

[0158] In some embodiments, the first end plate 40 is integrally formed with the thermal management component 30 .

[0159] In this embodiment, the first end plate 40 and the thermal management component 30 are integrally formed, the connection stability between the first end plate 40 and the thermal management component 30 is high, and 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, which can improve the assembly efficiency of the battery device 100.

[0160] In some embodiments, the second end plate 50 is integrally formed with the thermal management component 30 .

[0161] In this embodiment, the second end plate 50 and the thermal management component 30 are integrally formed, the connection stability between the second end plate 50 and the thermal management component 30 is high, and 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, which can improve the assembly efficiency of the battery device 100.

[0162] In some embodiments, a first cavity 41 is formed inside the first end plate 40 .

[0163] The first end plate 40 may be an expansion beam.

[0164] In this embodiment, the first cavity 41 enables the first end plate 40 to resist deformation, and the first end plate 40 can absorb external impact force, thereby improving the reliability of the battery device 100 .

[0165] In some embodiments, a second cavity 51 is formed inside the second end plate 50 .

[0166] The second end wall may be an expansion beam.

[0167] In this embodiment, the second cavity 51 enables the second end plate 50 to resist deformation, and the second end plate 50 can absorb external impact force, thereby improving the reliability of the battery device 100 .

[0168] In some embodiments, the box body 20 further includes a third wall 20c. Along the third direction Y, the third wall 20c is located on a side of the second end plate 50 away from the first end plate 40, and the second end plate 50 is connected to the third wall 20c.

[0169] The second end plate 50 and the third wall 20c may be detachably connected. The detachable connection method includes but is not limited to screw connection, clamping connection, etc.

[0170] The second end plate 50 may abut against the third wall 20 c.

[0171] In this 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. The second end plate 50 is connected to the third wall 20c to improve the structural stability of the battery device 100.

[0172] Reference Figure 8 In some embodiments, the housing 20 further includes a fourth wall 20d and a fifth wall 20e opposite to each other along the second direction X, and 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.

[0173] The connection methods between the heat management component 30 and the fourth wall 20d include but are not limited to screw connection, clamping connection, etc.

[0174] The connection methods between the heat management component 30 and the fifth wall 20e include but are not limited to screw connection, clamping connection, etc.

[0175] In this 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.

[0176] Reference Figure 10 In some embodiments, along the second direction X, first mounting members 43 may be provided on both sides of the thermal management component 30 , and both ends of the thermal management component 30 are respectively connected to the fourth wall 20 d and the fifth wall 20 e through the first mounting members 43 .

[0177] The first mounting member 43 may include a first connecting portion and a second connecting portion, 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 body 20 .

[0178] Reference Figure 10 , Figure 8 and Figure 3 In some embodiments, a second mounting member 25 may be further provided inside the box 20, the first mounting member 43 is provided with a first connection hole, the second mounting member 25 is provided with a second connection hole, and a locking member is passed through the first connection hole and the second connection hole to connect the first mounting member 43 and the second mounting member 25, thereby achieving connection between the thermal management component 30 and the box 20. The locking member includes but is not limited to bolts, screws, etc.

[0179] Of course, in other embodiments, the thermal management component 30 may also be connected to only one of the fourth wall 20d and the fifth wall 20e.

[0180] In some embodiments, both the first battery cell assembly 10a and the second battery cell assembly 10b are connected to the thermal management component 30, and the thermal management component 30 is configured to carry the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously.

[0181] Understandably, the thermal management component 30 not only adjusts the temperatures of the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously, but also carries the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously.

[0182] In this embodiment, the thermal management component 30 is configured to carry the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously, that is, the thermal management component 30 provides a force to overcome gravity for the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously.

[0183] Refer to Figure 8 , in some embodiments, along the first direction Z, a second pressure relief mechanism 15b is provided at an end of the second battery cell 1011b away from the thermal management component 30.

[0184] The second pressure relief mechanism 15b is configured to release the emissions of the second battery cell 1011b when the temperature or pressure inside the second battery cell 1011b reaches a threshold. The structure of the second pressure relief mechanism 15b may be the same as or different from that of the first pressure relief mechanism 15a.

[0185] In this embodiment, the second pressure relief mechanism 15b is provided at an end of the second battery cell 1011b away from the thermal management component 30, so that the second pressure relief mechanism 15b is disposed away from the first battery cell assembly 10a, reducing the impact of the emissions of the second battery cell 1011b on the first battery cell assembly 10a, and improving the reliability of the battery device 100.

[0186] Refer to Figure 10 , and with reference to Figure 8 , in an embodiment where the battery device 100 includes a first end plate 40 and a second end plate 50, and a collection cavity 60 is formed between the first end plate 40 and the second wall 20b, the first end plate 40 may further be provided with a communication portion 42. The communication portion 42 penetrates through both sides of the first end plate 40 along the third direction Y, and the communication portion 42 communicates with the collection cavity 60, so that the emissions of the second battery cell 1011b can also enter the collection cavity 60.

[0187] In some embodiments, the second battery cell 1011b includes a second pressure relief mechanism 15b disposed on a side facing away from the first battery cell 1011a.

[0188] In this embodiment, the second pressure relief mechanism 15b is disposed away from the first battery cell assembly 10a, which can relieve the impact of the emissions of the second battery cell 1011b on the first battery cell assembly 10a, further improving the reliability of the battery device 100.

[0189] In some embodiments, along the first direction Z, the first battery cell 1011a further includes a first electrode terminal 14a disposed on a side facing away from the second battery cell 1011b, and the second battery cell 1011b further includes a second electrode terminal 14b disposed on a side facing away from the first battery cell 1011a.

[0190] In this embodiment, the first electrode terminal 14a is disposed away from the thermal management component 30, facilitating heat exchange between the first battery cell 1011a and the thermal management component 30 and improving the heat exchange efficiency. The second electrode terminal 14b is disposed away from the thermal management component 30, facilitating heat exchange between the second battery cell 1011b and the thermal management component 30 and improving the heat exchange efficiency.

[0191] In some embodiments, the first direction Z is parallel to the direction of gravity.

[0192] The first direction Z is parallel to the direction of gravity, that is, the first battery cell assembly 10a is located below the thermal management component 30, and the second battery cell assembly 10b is located above the thermal management component 30. In this structure, the first wall 20a is provided with a receiving channel 211, which can particularly relieve the impact of the emissions of the first battery cell 1011a upward on the second battery cell assembly 10b due to high temperature or high pressure.

[0193] An embodiment of the present application provides an electrical device, including the above-mentioned battery device 100, and the battery device 100 is used to supply power to the electrical device.

[0194] Refer to Figures 2 to 10, an embodiment of the present application further provides a battery device 100. The battery device 100 includes a box body 20, a first battery cell assembly 10a, a second battery cell 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 body 20 includes a bottom plate 21, a top cover 22, and a frame body 23. A first opening is formed at the bottom of the frame body 23, and a second opening is formed at the top of the frame body 23. 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 cell assembly 10a, the second battery cell assembly 10b, the thermal management component 30, the first end plate 40, and the second end plate 50 are all accommodated in the box body 20. The first battery cell assembly 10a and the second battery cell assembly 10b are stacked along a first direction Z, and the first direction Z is parallel to the gravity direction. The thermal management component 30 is located between the first battery cell assembly 10a and the second battery cell assembly 10b. The second battery cell assembly 10b is located above the thermal management component 30, and the first battery cell assembly 10a is located below the thermal management component 30. Along the first direction Z, the thermal management component 30 has a first surface 31 facing the first battery cell assembly 10a and a second surface 32 facing the second battery cell assembly 10b. The first battery cell assembly 10a is thermally connected to the first surface 31, and the second battery cell assembly 10b is thermally connected to the second surface 32. The thermal management component 30 is used to carry the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously, and the thermal management component 30 adjusts the temperatures of the first battery cell assembly 10a and the second battery cell assembly 10b simultaneously. The first battery cell assembly 10a includes a plurality of first battery cell units 101a, and the plurality of first battery cell units 101a are arranged along a second direction X. Each first battery cell unit 101a includes a plurality of first battery cells 1011a arranged along a third direction Y. The second battery cell assembly 10b includes a plurality of second battery cell units 101b, and the plurality of second battery cell units 101b are arranged along the second direction X. Each second battery cell unit 101b includes a plurality of second battery cells 1011b arranged along the third direction Y. The first direction Z, the second direction X, and the third direction Y are perpendicular to each other pairwise. The first end plate 40 and the second end plate 50 are spaced apart along the third direction Y. The thermal management component 30 is connected to 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. Along 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 cell assembly 10a is located between the first end plate 40 and the second end plate 50, and the second battery cell assembly 10b is located between the first end plate 40 and the second end plate 50. Both the first end plate 40 and the second end plate 50 are expansion beams.One end of the first battery cell 1011a away from the thermal management component 30 is provided with a first electrode terminal 14a, and one end of the second battery cell 1011b away from the thermal management component 30 is further provided with a second electrode terminal 14b. One end of the first battery cell 1011a close to the bottom plate 21 is provided with a first pressure relief mechanism 15a, and one end of the second battery cell 1011b away from the thermal management component 30 is provided with a second pressure relief mechanism 15b. Along the second direction X, first mounting members 43 are respectively arranged at both ends of the thermal management component 30, and a second mounting member 25 is arranged inside the frame body 23. The second mounting member 25 supports the first mounting member 43. The first mounting member 43 is provided with a first connection hole, and the second mounting member 25 is provided with a second connection hole opposite to the first connection hole. A locking accessory is inserted through the first connection hole and the second connection hole to connect the first mounting member 43 and the second mounting member 25, so as to realize the connection between the thermal management component 30 and the frame body 23. A third mounting member 26 is arranged outside the frame body 23, and the third mounting member 26 is used to connect to the vehicle body to realize the installation of the battery device 100. The second end plate 50 is connected to the frame body 23. The box body 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 cell 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. A collection cavity 60 is formed between the first end plate 40 and the second wall 20b. A storage channel 211 is formed inside the first wall 20a, 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 cell assembly 10a. The first through hole 212 is communicated with the storage channel 211. There are multiple first through holes 212, and the multiple first through holes 212 correspond to the multiple first battery cells 1011a one by one. A second through hole 213 is arranged on the side of the first wall 20a facing the collection cavity 60, and the collection cavity 60 is communicated with the storage channel 211 through the second through hole 213. A pressure relief valve 70 is arranged on the second wall 20b, and the pressure relief valve 70 is used to discharge the emissions in the collection cavity 60. Among them, the first wall 20a is the bottom plate 21. The storage channel 211 includes multiple sub-channels 2111. The multiple sub-channels 2111 are arranged at intervals along the second direction X. Each sub-channel 2111 extends along the third direction Y. The multiple sub-channels 2111 correspond to the multiple first battery cell units 101a one by one. Each sub-channel 2111 is used to collect the emissions of the first battery cell unit 101a corresponding to the sub-channel 2111. The sub-channel 2111 is a cavity formed inside the first wall 20a. There are multiple second through holes 213, and the multiple second through holes 213 correspond to the multiple sub-channels 2111 one by one. The orthographic projection of the first end plate 40 on the first wall 20a is the first projection, and the orthographic projection of the second end plate 50 on the first wall 20a is the 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.

[0195] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0196] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: A box body; A first battery cell assembly and a second battery cell assembly, which are stacked in a first direction in the box body. 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 facing away from the second battery cell; Wherein, a wall of the box body opposite to the first pressure relief mechanism is a first wall, and a receiving channel is provided in the first wall. A first through hole communicating with the receiving channel is provided on the first wall, and the first through hole is opposite to the first pressure relief mechanism.

2. The battery device according to claim 1, wherein A plurality of the first through holes are provided, and the plurality of first through holes correspond to the plurality of first battery cells one by one.

3. The battery device according to claim 2, characterized in that, The first battery cell assembly includes a plurality of first battery cell units, and the plurality of first battery cell units are arranged in a second direction. Each first battery cell unit includes a plurality of first battery cells arranged in a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other in pairs.

4. The battery device according to claim 3, wherein The receiving channel includes a plurality of sub-channels, and the plurality of sub-channels are arranged at intervals in the second direction. Each sub-channel extends in the third direction, and the plurality of sub-channels correspond to the plurality of first battery cell units one by one. Each sub-channel is used to collect the emissions of the first battery cell unit corresponding to the sub-channel.

5. The battery device according to 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 3, characterized in that The battery device further includes: A thermal management component, at least partially disposed between the first battery cell assembly and the second battery cell assembly to adjust the temperatures of the first battery cell assembly and the second battery cell assembly.

7. The battery device according to claim 6, wherein The battery device further includes: A first end plate and a second end plate, which are accommodated in the box body. The first end plate and the second end plate are arranged at intervals in the 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.

8. The battery device according to claim 7, characterized in that, The thermal management component has a first surface facing the first battery cell assembly and a second surface facing the second battery cell assembly. Along the first direction, both ends of the first end plate respectively exceed the first surface and the second surface, and both ends of the second end plate respectively exceed the first surface and the second surface. The first battery cell assembly is located between the first end plate and the second end plate, and the second battery cell assembly is located between the first end plate and the second end plate.

9. The battery device according to claim 8, characterized in that, The box body further includes a second wall, which is located on a side of the first end plate facing away from the second end plate in the third direction and is spaced from the first end plate. 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 is communicated with the receiving channel through the second through hole.

10. The battery device according to claim 9, characterized in that, The storage channel includes a plurality of sub-channels, the plurality of sub-channels are arranged at intervals along the second direction, each of the sub-channels extends along the third direction, a plurality of second through holes are provided, a plurality of the second through holes correspond one-to-one to the plurality of sub-channels, and the first direction, the second direction and the third direction are perpendicular to each other.

11. The battery device according to claim 9, characterized in that, Along the first direction, the orthographic projection of the first end plate on the first wall is a first projection, and the orthographic 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 a side of the first projection that is away from the second projection.

12. The battery device according to claim 9, characterized in that, 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 from the collection chamber.

13. The battery device according to claim 7, characterized in that, The first end plate and the thermal management component are integrally formed; and / or the second end plate and the thermal management component are integrally formed.

14. The battery device according to claim 7, characterized in that, A first cavity is formed inside the first end plate; and / or a second cavity is formed inside the second end plate.

15. The battery device according to claim 7, characterized in that, The box body further includes a third wall. Along the third direction, the third wall is located on a side of the second end plate away from the first end plate, and the second end plate is connected to the third wall.

16. The battery device according to claim 7, wherein The box body also includes a fourth wall and a fifth wall opposite to each other along a 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 a plane formed by the first direction and the third direction.

17. The battery device according to claim 6, characterized in that, The first battery cell assembly and the second battery cell assembly are both connected to the thermal management component, and the thermal management component is used to simultaneously support the first battery cell assembly and the second battery cell assembly.

18. The battery device according to any one of claims 1-5, characterized in that, Along the first direction, the second battery cell includes a second pressure relief mechanism disposed on a side away from the first battery cell.

19. The battery device according to claim 18, characterized in that, Along the first direction, the first battery cell further includes a first electrode terminal disposed on a side away from the second battery cell, and the second battery cell further includes a second electrode terminal disposed on a side away from the first battery cell.

20. The battery device according to any one of claims 1-5, characterized in that, The first direction is parallel to the direction of gravity.

21. An electrical device, characterized in that, It comprises the battery device according to any one of claims 1 to 20, wherein the battery device is used to supply power to the electrical device.

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