Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a battery monomer and a smoke discharge structure, the battery monomer comprises a shell and an end cover, the end cover covers the shell along a first direction, and the end cover is provided with a first pressure relief part; the smoke exhaust structure is arranged on the end cover, a smoke exhaust channel is formed in the smoke exhaust structure, an inlet of the smoke exhaust channel corresponds to the first pressure relief part, and an outlet of the smoke exhaust channel is used for communicating with the outside; the smoke discharging structure comprises a filtering piece, the filtering piece is partially exposed out of the smoke discharging channel, and the filtering piece is configured to allow part of smoke in the smoke discharging channel to be discharged outwards after being filtered by the filtering piece. According to the technical scheme provided by the invention, when the battery monomers are in thermal runaway, under the action of internal and external pressure difference, the smoke in the smoke exhaust channel can be actively filtered by the filtering piece and then is exhausted outwards, and the exhausted smoke is clean smoke, so that the problem of open smoke leakage when the battery monomers are in thermal runaway in the current battery device is solved, and the reliability of the smoke exhaust structure is improved.

Description

Technical Field

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

[0002] In the battery device of new energy vehicles, the smoke exhaust structure is a key safety structure design, mainly used to deal with the high-temperature and high-pressure flue gas generated when the battery cells in the battery device undergo thermal runaway. However, during the smoke exhaust process of the current smoke exhaust structure, there is still some flue gas leaking out from places other than the smoke exhaust outlet. This part of the flue gas may enter the cockpit and cause harm to the passengers in the cockpit, resulting in the reliability of the current smoke exhaust structure being difficult to meet the requirements. Summary of the Utility Model

[0003] The main purpose of this application is to propose a battery device and an electrical equipment, aiming to improve the problem that the reliability of the smoke exhaust structure of the current battery device is difficult to meet the requirements.

[0004] In a first aspect, the battery device proposed in this application includes:

[0005] A battery cell, including a housing and an end cover, the end cover is covered on the housing along a first direction, and the end cover is provided with a first pressure relief portion; and,

[0006] A smoke exhaust structure, arranged on the end cover, the smoke exhaust structure forms a smoke exhaust channel, the inlet of the smoke exhaust channel is correspondingly arranged corresponding to the first pressure relief portion, and the outlet of the smoke exhaust channel is used to communicate with the outside;

[0007] The smoke exhaust structure includes a filter element, and part of the filter element is exposed in the smoke exhaust channel. The filter element is configured to allow part of the flue gas in the smoke exhaust channel to be discharged outward after being filtered by itself.

[0008] In the technical solution provided by this application, the smoke exhaust structure includes a filter element, and part of the filter element is exposed in the smoke exhaust channel. After the battery cell undergoes thermal runaway, the high-temperature and high-pressure gas ejected from the first pressure relief portion can enter the smoke exhaust channel through the inlet of the smoke exhaust channel, causing the pressure in the smoke exhaust channel to rise sharply. Under the action of the internal and external pressure difference, the high-pressure flue gas in the smoke exhaust channel is easily discharged outward through the filter element. Under the filtering action of the filter element, the particulate matter and toxic substances in the high-pressure flue gas can be filtered out, so that the discharged flue gas is clean flue gas and is not likely to cause harm to the passengers in the cockpit, thereby improving the reliability of the smoke exhaust structure.

[0009] In some embodiments, the filter element forms a partial channel section of the smoke exhaust channel.

[0010] In the above technical solution, the filter element forms a partial channel section of the smoke exhaust channel, so that smoke can be filtered outwards from all directions on the periphery of the smoke exhaust channel, ensuring the smoke filtering efficiency of the filter element.

[0011] In some embodiments, the smoke exhaust structure further includes a smoke exhaust member that presses the filter element along the first direction and abuts the filter element against the end cap.

[0012] The smoke exhaust channel has a first channel section formed in the smoke exhaust member and a second channel section formed in the filter element. The first channel section and the second channel section are connected, and the inlet of the smoke exhaust channel is formed at one end of the second channel section facing away from the first channel section.

[0013] The above technical solution abandons the traditional method of setting a sealing structure between the smoke exhaust member and the end cap. Instead of seeking to achieve complete sealing between the smoke exhaust member and the end cap of the battery cell, a filter element is provided between the smoke exhaust member and the end cap of the battery cell. The high-pressure smoke that is difficult to be completely sealed and overflows is filtered by the filter element and then actively discharged outwards, further reducing the leakage of visible smoke.

[0014] In some embodiments, the battery device further includes a cooling device disposed in the first channel section and configured to discharge a coolant towards the second channel section when the first pressure relief portion erupts.

[0015] In the above technical solution, a cooling device is provided in the first channel section. When the first pressure relief portion erupts, the cooling device can discharge the coolant towards the second channel section, and the coolant can effectively reduce the temperature of the first pressure relief portion, thereby delaying the spread rate of the thermal runaway of the battery cell.

[0016] In some embodiments, the cooling device includes a cooling bag disposed corresponding to the second channel section along the first direction. The cooling bag is used to fill a coolant and is configured to be melted under the eruption action of the first pressure relief portion.

[0017] In the above technical solution, when the first pressure relief portion erupts, the high-temperature and high-pressure smoke can directly act on the cooling bag in the first channel section through the second channel section, thereby melting the cooling bag. The coolant filled in the cooling bag can flow out passively and enter the second channel section, thereby cooling the first pressure relief portion.

[0018] In some embodiments, a plurality of battery cells are arranged along the second direction, and the filter element is formed with a plurality of second channel sections, and the plurality of second channel sections are respectively arranged corresponding to the first pressure relief portions of the plurality of battery cells.

[0019] The first channel section and the cooling bag extend along the second direction respectively, and are arranged corresponding to a plurality of the second channel sections.

[0020] In the above technical solution, the cooling bag is extended along the second direction. When any one or more first pressure relief parts of multiple battery cells erupt, the corresponding position on the cooling bag can be melted, thereby cooling the erupted first pressure relief part. In this way, the cooling bag can provide cooling protection for the first pressure relief part of each battery cell.

[0021] In some embodiments, the smoke exhaust member has a holding end surface, the holding end surface is disposed against the filter member, and an opening communicating between the first channel section and the second channel section is disposed on the holding end surface;

[0022] The pressing end surface forms a limiting protrusion, which surrounds the opening of the first channel section and extends into the second channel section of the filter element.

[0023] In the above technical solution, on the one hand, the limiting protrusion can effectively limit the displacement of the filter element, and on the other hand, the limiting protrusion can also play a role in propping up the second channel section to prevent the second channel section from collapsing after the filter element is compressed by the smoke exhaust element, thereby ensuring the smooth flow of the smoke exhaust channel.

[0024] In some embodiments, the filter element is bonded to the pressing end surface; and / or,

[0025] The filter element is bonded to the end cover.

[0026] In the above technical scheme, the filter element is bonded to the holding end surface, so that the filter element and the smoke exhaust element can be transported and assembled as a whole, and can also prevent the filter element from deviating from its position during use, which is beneficial to ensuring the filtering reliability of the filter element; the filter element is bonded to the end cover, which is beneficial to eliminating the gap between the filter element and the end cover, and reducing the occurrence of high-pressure flue gas escaping out of the gap between the filter element and the end cover without being filtered.

[0027] In some embodiments, the filter element is configured as filter foam.

[0028] In the above technical solution, the filter element is set as filter foam. Since the density of the filter foam is usually low, it is beneficial to control the overall quality of the smoke exhaust structure. Moreover, the filter foam usually has a certain elastic deformation ability, which is beneficial to maintain sufficient contact and sealing performance between the filter foam and other structural parts of the smoke exhaust structure, thereby reducing the situation where high-pressure smoke is discharged outward without being filtered.

[0029] In some embodiments, the smoke exhaust structure is provided with a smoke exhaust nozzle at the outlet of the smoke exhaust passage, and a second pressure relief portion is arranged in the smoke exhaust nozzle.

[0030] In the above technical solution, after thermal runaway occurs in the battery cell, the high-pressure flue gas discharged by the first pressure relief portion will cause the pressure in the smoke exhaust passage to rise sharply. Due to the presence of the filter element, a part of the high-pressure flue gas can be filtered out, so that the rising rate of the pressure in the smoke exhaust passage is delayed. The second pressure relief portion can retain the high-temperature and high-pressure flue gas in the smoke exhaust passage for a longer time, thereby giving the driver and passengers more time to escape.

[0031] In some embodiments, the smoke exhaust member includes a first structural portion and a second structural portion. The first structural portion and the second structural portion are arranged along the first direction and jointly define the first channel segment. An opening for the first channel segment to communicate with the second channel segment is formed in the second structural portion.

[0032] Wherein, the second structural portion presses the filter element.

[0033] In the above technical solution, the smoke exhaust member is set to be composed of a first structural portion and a second structural portion. By jointly defining the first channel segment by the first structural portion and the second structural portion, the first channel segment can be formed in a simpler manner, and the first channel segment has higher processing accuracy.

[0034] In some embodiments, one of the first structural portion and the second structural portion is formed with an annular groove, and the other is formed with an annular protrusion. The annular protrusion surrounds the first channel segment and is embedded in the annular groove.

[0035] In the above technical solution, the first structural portion and the second structural portion can be structurally connected through the engagement of the annular groove and the annular protrusion. Since the annular protrusion is arranged around the first channel segment, it also has the function of sealing the first channel segment.

[0036] In some embodiments, a sealant is further arranged between the annular protrusion and the groove wall of the annular groove.

[0037] In the above technical solution, through the arrangement of the sealant, the gap between the annular protrusion and the groove wall of the annular groove can be eliminated, thereby further improving the sealing performance between the first structural portion and the second structural portion.

[0038] In some embodiments, a partial area of the first structural portion is recessed away from the second structural portion, and a smoke exhaust protrusion is formed on the side away from the second structural portion. The smoke exhaust protrusion is provided with a smoke exhaust nozzle, and the smoke exhaust nozzle communicates with the first channel segment and extends along the second direction.

[0039] In the above technical solution, the smoke exhaust nozzle is connected to the first channel section and extends along the second direction, so that the smoke exhaust direction of the smoke exhaust structure can be changed to the second direction, thereby reducing the space occupied by the smoke exhaust structure in the first direction of the battery device. Moreover, since the smoke exhaust nozzle is arranged on the smoke exhaust protrusion, and the smoke exhaust protrusion is formed by the local area of the first structural part being recessed away from the second structural part, the flue gas in the first channel section can more easily enter the smoke exhaust protrusion and reach the smoke exhaust nozzle, which is beneficial to reducing the smoke exhaust resistance of the smoke exhaust channel.

[0040] In some embodiments, the second structural part is arranged as a wire harness board.

[0041] In the above technical solution, by arranging the second structural part as a wire harness board, the wire harness board is integrated on the smoke exhaust structure. The smoke exhaust structure can not only exhaust smoke outward directionally through its smoke exhaust channel, but also manage high-voltage wire harnesses, low-voltage signal lines, communication cables, etc. in the battery device through the wire harness board.

[0042] In some embodiments, a plurality of battery cells are arranged along the second direction, and a heat exchange partition is arranged between two adjacent battery cells. At least one end of at least part of the heat exchange partition close to the end cover is provided with a first locking part;

[0043] At least one of the first structural part and the second structural part is connected to the first locking part.

[0044] In the above technical solution, by providing the first locking part at one end of the heat exchange partition close to the end cover, the first locking part can provide an installation basis for the first structural part and the second structural part, thereby improving the structural stability of the battery device.

[0045] In some embodiments, the plurality of heat exchange partitions include a first partition at the middle position, and the first locking part is provided at least on the first partition;

[0046] The thickness of the first partition along the second direction is greater than that of the other heat exchange partitions; and / or,

[0047] The material of the first partition is a metal material.

[0048] In the above technical solution, the heat exchange partition at the middle position among the plurality of heat exchange partitions is set as the first partition. Since the first partition is provided with the first locking part, and the thickness of the first partition along the second direction is greater than that of the other heat exchange partitions and the material of the first partition is a metal material, the first partition can withstand a greater locking pressure, and the smoke exhaust part can obtain a more stable installation basis through the first locking part on the first partition.

[0049] In some embodiments, a plurality of the battery cells are arranged along a second direction, and end plates are provided at both ends of the plurality of battery cells along the second direction. A second locking portion is provided at one end of the end plate close to the end cover.

[0050] At least one of the first structural portion and the second structural portion is connected to the second locking portion.

[0051] In the above technical solution, end plates are further provided at both ends of the plurality of battery cells along the second direction. The end plates can play a certain role in restraining the thermal expansion of the battery cells. Moreover, a second locking portion is provided at one end of the end plate close to the end cover. The second locking portion can provide an installation basis for the first structural portion and the second structural portion, thereby improving the structural stability of the battery device.

[0052] In a second aspect, the present application further provides an electrical equipment, and the electrical equipment includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0054] Figure 1 It is a schematic structural diagram of an embodiment of a vehicle which is the electrical equipment provided by the present application;

[0055] Figure 2 It is an exploded structural schematic diagram of an embodiment of the battery device provided by the present application;

[0056] Figure 3 It is an exploded structural schematic diagram of another embodiment of the battery device provided by the present application;

[0057] Figure 4 For Figure 3 It is an enlarged structural schematic diagram of a partial A;

[0058] Figure 5 It is a side view structural schematic diagram of an embodiment of the battery device provided by the present application;

[0059] Figure 6 For Figure 5 It is a structural schematic diagram of a section B-B;

[0060] Figure 7 For Figure 6 It is an enlarged structural schematic diagram of a partial C;

[0061] Figure 8 is Figure 5 the three-dimensional structure schematic diagram of the smoke exhaust structure in

[0062] Figure 9 is Figure 5 the exploded structure schematic diagram of one perspective of the smoke exhaust structure in

[0063] Figure 10 is Figure 9 the enlarged structure schematic diagram of the local part D in

[0064] Figure 11 is Figure 9 the structure schematic diagram of another perspective of the first structural part in

[0065] Figure 12 is Figure 9 the bottom view structure schematic diagram of the first structural part;

[0066] Figure 13 is Figure 5 the bottom view structure schematic diagram of the smoke exhaust structure in

[0067] Figure 14 is Figure 5 the exploded structure schematic diagram of another perspective of the smoke exhaust structure in

[0068] Figure 15 is Figure 14 the enlarged structure schematic diagram of the local part E in

[0069] Explanation of the reference numerals in the attached drawings:

[0070] 1000, vehicle;

[0071] 100, battery device; 200, controller; 300, motor;

[0072] 1, box body; 11, box main body; 12, box cover; 2, battery cell; 21, housing; 22, end cover; 23, first pressure relief part; 3, smoke exhaust structure; 3a, smoke exhaust channel; 31a, first channel section; 32a, second channel section; 31, smoke exhaust part; 311, first structural part; 311a, smoke exhaust protrusion; 311b, smoke exhaust nozzle; 311c, annular protrusion; 311d, ear plate; 312, second structural part; 312a, wire harness board; 312b, pressing end face; 312c, limiting protrusion; 312d, annular groove; 32, filter part; 321, filter foam; 33, cooling device; 33a, cooling bag; 34, second pressure relief part; 4, heat exchange partition; 4a, first partition; 41, first locking part; 5, end plate; 51, second locking part;

[0073] X, first direction; Y, second direction.

[0074] The realization of the purpose of this application, its functional features and advantages will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners

[0075] The embodiments of the technical solution of this application will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to illustrate the technical solution of this application more clearly, and therefore are only examples and cannot be used to limit the protection scope of this application.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein 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.

[0077] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0078] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0079] In the description of the embodiments of this application, the term "a plurality of" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0080] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of 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 therefore cannot be understood as a limitation to the embodiments of this application.

[0081] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0082] The battery device disclosed in the embodiments of the present application can be used to provide electrical energy for electrical equipment. Among them, the electrical equipment can be, but is not limited to, battery cars, electric vehicles, ships, spacecraft, and the like. Among them, the spacecraft can include airplanes, rockets, space shuttles, and spaceships, and so on.

[0083] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical equipment in an embodiment of the present application.

[0084] Please refer to Figure 1 , Figure 1 FIG. 13 is a structural schematic diagram of an embodiment of a vehicle 1000 provided by the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, or the like. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0085] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used 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.

[0086] For the convenience of understanding the battery device 100 provided by the present application, please refer to Figure 2 , Figure 2Schematic exploded view of an embodiment of the battery device 100 provided by the present application. The battery device 100 generally includes a box body 1 and battery cells 2. An installation cavity is formed in the box body 1, and the battery cells 2 are loaded through the installation cavity. The basic structure of the box body 1 generally includes a box main body 11 and a box cover 12. The box cover 12 is arranged on the box main body 11 and jointly defines the installation cavity with the box main body 11. Generally speaking, the battery cells 2 are generally arranged in the box main body 11. After the battery device 100 is mounted on the vehicle 1000, the box cover 12 is generally close to the vehicle 1000, and the box main body 11 is generally away from the vehicle 1000; the installation cavity can be mainly formed in the box main body 11. At this time, the box main body 11 can be understood as a basin-like structure, and the box cover 12 is covered on the box main body 11 to cover the installation cavity; the installation cavity can also be mainly formed in the box cover 12. At this time, the box cover 12 can be understood as a cover-like structure, and the box cover 12 covers the box main body 11 to cover the battery cells 2 carried on the box main body 11 into the box cover 12. Of course, the structure of the box body 1 is not limited to this.

[0087] The number of battery cells 2 in the box body 1 can be one or multiple. Among them, when multiple battery cells 2 are provided, the multiple battery cells 2 can be connected in series, parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 2. The multiple battery cells 2 can be directly connected in series, parallel or in a hybrid connection to form a battery unit. Of course, the multiple battery cells 2 can also be in the form that the battery cells 2 are first connected in series, parallel or in a hybrid connection to form battery modules, and then the multiple battery modules are connected in series, parallel or in a hybrid connection to form a battery unit. The battery device 100 can also include other structures, such as a busbar component, for realizing the electrical connection between multiple battery cells 2 or multiple battery modules. Among them, each battery cell 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 2 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0088] Of course, other embodiments of the battery device 100 provided by the present application may not include the box body 1, but are presented in the form of the above-mentioned battery modules.

[0089] In the present application, the battery cell 2 can include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc. The embodiments of the present application are not limited thereto. The battery cell 2 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are also not limited thereto. The battery cell 2 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells. The embodiments of the present application are also not limited thereto.

[0090] The structure of the battery cell 2 usually includes a shell, an end cover, an electrode assembly and an electrode terminal. The end cover is set on the opening of the shell and defines a receiving cavity together with the shell. The electrode assembly is set in the receiving cavity. The electrode terminal penetrates the end cover and is electrically connected to the pole ear of the electrode assembly through the adapter component. Among them, the electrode assembly is a component in the battery cell 2 where an electrochemical reaction occurs. It is mainly formed by a positive electrode sheet and a negative electrode sheet through a winding or stacking process, and a separation film is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear can be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte filled in the shell.

[0091] In the battery device of new energy vehicles, the smoke exhaust structure is a key safety structural design, which is mainly used to deal with the high-temperature and high-pressure flue gas generated when the battery cell in the battery device has thermal runaway. When the battery cell causes thermal runaway due to overcharging, short circuit or mechanical damage, a large amount of flammable and toxic gases (such as CO, HF, etc.) will quickly accumulate inside, accompanied by a sharp temperature rise. The pressure relief part set on the battery cell will automatically open when the pressure reaches the threshold, quickly release the internal pressure, and avoid the battery cell shell bursting or causing secondary accidents. At the same time, the smoke exhaust structure will exhaust the high-temperature and high-pressure smoke to a safe area (such as the bottom of the vehicle) through its internal preset smoke exhaust channel, preventing the open smoke containing harmful substances from entering the passenger compartment, buying time for personnel escape and system emergency response, and is an important part of the battery passive safety system.

[0092] Since the current smoke exhaust structure is difficult to be directly integrally formed with the battery cell, a sealing structure usually needs to be provided between the interface of the smoke exhaust structure and the battery cell. The sealing structure is arranged around the pressure relief part of the battery cell to prevent high-temperature and high-pressure flue gas from discharging outward through the interface gap between the smoke exhaust structure and the battery cell. Among them, the sealing effect of the sealing structure is affected by many factors, such as the sealing pressure and the sealing thickness. The sealing structure requires the smoke exhaust structure to apply sufficient sealing pressure towards the battery cell, and at the same time needs to have a relatively large sealing thickness (for example, when the sealing structure is a sealing ring arranged around the pressure relief part of the battery cell, the sealing thickness refers to the thickness in the radial direction of the sealing ring). However, in the current battery device, it is difficult for the smoke exhaust structure to apply sufficient sealing pressure to the sealing structure, and the setting of the sealing structure is affected by the electrode terminals on the battery cell, and an ideal sealing thickness cannot be obtained, resulting in an unsatisfactory sealing effect of the sealing structure. There are still smoke leakage points. After the pressure relief part of the battery cell is opened, the internal pressure of the smoke exhaust channel of the smoke exhaust structure rises sharply, and the high-pressure flue gas does not have enough time to be completely discharged outward through the smoke exhaust structure. Part of the high-pressure flue gas can still leak outward from the gap between the sealing structure and the battery cell. This part of the flue gas is visible smoke, which may enter the cockpit and is likely to cause harm to the passengers in the cockpit, resulting in the reliability of the smoke exhaust structure being difficult to meet the requirements.

[0093] Analyzing the above problems, it is less likely to completely seal the smoke exhaust channel through the sealing structure. It can be considered to "transform blockage into dredging", change the current sealing scheme, and set a filter element on the smoke exhaust structure. After the pressure relief part of the battery cell is opened and the internal pressure of the smoke exhaust channel of the smoke exhaust structure rises sharply, the filter element can be used as a weak sealing point to actively guide part of the high-pressure flue gas to be discharged outward after filtration, thereby reducing the sealing pressure of the sealing structure (the high-pressure flue gas is more likely to be discharged outward through the filter element rather than the sealing structure). At the same time, the discharged flue gas is clean flue gas and is not likely to cause harm to the passengers in the cockpit, so as to improve the reliability of the smoke exhaust structure.

[0094] To facilitate understanding of the battery device provided in this application, the following will be described with reference to the accompanying drawings. Among them, Figure 3 is an exploded structural schematic diagram of another embodiment of the battery device provided in this application; Figure 4 is Figure 3 an enlarged structural schematic diagram of the partial area A in Figure 5 is a side view structural schematic diagram of an embodiment of the battery device provided in this application; Figure 6 is Figure 5 a structural schematic diagram of the section B-B in Figure 7 is Figure 6 an enlarged structural schematic diagram of the partial area C in Figure 8 is Figure 5 a three-dimensional structural schematic diagram of the smoke exhaust structure in Figure 9 isFigure 5 Exploded structure schematic diagram of a perspective of the middle smoke exhaust structure; Figure 10 is Figure 9 Enlarged structure schematic diagram of the local part D in the middle; Figure 11 is Figure 9 Structure schematic diagram of another perspective of the first structure part in the middle; Figure 12 is Figure 9 Bottom view structure schematic diagram of the first structure part; Figure 13 is Figure 5 Bottom view structure schematic diagram of the smoke exhaust structure in the middle; Figure 14 is Figure 5 Exploded structure schematic diagram of another perspective of the smoke exhaust structure in the middle; Figure 15 is Figure 14 Enlarged structure schematic diagram of the local part E in the middle.

[0095] Please refer to Figures 5 to 7 , in an embodiment of the present application, the battery device 100 includes battery cells 2 and a smoke exhaust structure 3. The battery cells 2 include a housing 21 and an end cover 22. The end cover 22 is covered on the housing 21 along the first direction X. The end cover 22 is provided with a first pressure relief part 23. The smoke exhaust structure 3 is arranged on the end cover 22. The smoke exhaust structure 3 forms a smoke exhaust passage 3a. The inlet of the smoke exhaust passage 3a is arranged corresponding to the first pressure relief part 23. The outlet of the smoke exhaust passage 3a is used for communicating with the outside. The smoke exhaust structure 3 includes a filter element 32. The filter element 32 is partially exposed in the smoke exhaust passage 3a. The filter element 32 is configured to allow part of the smoke in the smoke exhaust passage 3a to pass through itself and be discharged outwards after filtration.

[0096] It should be noted that the first direction X mentioned in this embodiment and the second direction Y mentioned in the following embodiments belong to two intersecting directions. In principle, the included angle between the two directions can be any value between 0° and 180° (excluding 0° and 180°), but generally speaking, the first direction X and the second direction Y are perpendicular to each other. The "first pressure relief part 23" is arranged on the end cover 22 of the battery cell 2. When the pressure inside the battery cell 2 rises sharply due to abnormal working conditions (such as thermal runaway, overcharging, short circuit, etc.) and reaches the threshold value of the first pressure relief part 23, the first pressure relief part 23 can be actively opened to release the internal pressure of the battery cell 2, avoiding violent explosion or rupture of the battery cell 2. This embodiment will not elaborate on the pressure relief part.

[0097] The "smoke exhaust structure 3" forms a smoke exhaust passage 3a. In this embodiment, the extension mode of the smoke exhaust passage 3a is not limited. The smoke exhaust passage 3a can extend linearly or bend. The smoke exhaust passage 3a usually has an inlet and an outlet. "The inlet of the smoke exhaust passage 3a corresponds to the first pressure relief part 23 on the battery cell 2" means that the inlet of the smoke exhaust passage 3a is conductively connected to the first pressure relief part 23 on the battery cell 2. When thermal runaway occurs in the battery cell 2, the high-temperature and high-pressure flue gas discharged from the first pressure relief part 23 can enter the smoke exhaust passage 3a through the inlet of the smoke exhaust passage 3a.

[0098] The smoke exhaust structure 3 includes a filter element 32, and part of the filter element 32 is exposed in the smoke exhaust passage 3a. In this embodiment, the specific position where the filter element 32 is exposed in the smoke exhaust passage 3a is not limited. The filter element 32 may be exposed in the middle of the smoke exhaust extension path of the smoke exhaust passage 3a, or may be exposed at both ends of the smoke exhaust extension path of the smoke exhaust passage 3a. For example, the smoke exhaust structure 3 further includes a main structure, the smoke exhaust passage 3a is formed in the main structure, and the main structure is correspondingly provided with an exposure opening in the middle of the smoke exhaust passage 3a, and the exposure opening is communicated with the smoke exhaust passage 3a, and the filter element 32 can be filled in the exposure opening; "the filter element 32" is configured to allow part of the flue gas in the smoke exhaust passage 3a to be discharged outward after being filtered by itself, which means that on the one hand, the filter element 32 is exposed in the smoke exhaust passage 3a, and on the other hand, it is also exposed to the outside, so that part of the high-pressure flue gas in the smoke exhaust passage 3a can be discharged outward through the filter element 32 (instead of being completely discharged outward through the outlet of the smoke exhaust passage 3a). The filter element 32 can be soot filter paper, non-woven fabric, etc. In this embodiment, the specific structural form of the filter element 32 is not limited.

[0099] In this embodiment, the connection mode between the smoke exhaust structure 3 and the end cover 22 of the battery cell 2 is not limited. The smoke exhaust structure 3 and the end cover 22 can be hermetically arranged through a sealing structure, or the smoke exhaust structure 3 can be directly abutted against the end cover 22. It is worth mentioning that the function of the "filter element 32" is to filter the smoke exhaust, not to seal. Even if there is a partial gap between the smoke exhaust structure 3 and the end cover 22, under the action of the pressure difference inside and outside the smoke exhaust passage 3a, the high-pressure flue gas in the smoke exhaust passage 3a is more likely to be actively discharged outward from the filter element 32. Anyway, through the setting of the filter element 32, at least the amount of visible smoke overflowing between the smoke exhaust structure 3 and the end cover 22 can be reduced, thereby improving the problem of visible smoke leakage.

[0100] In the technical solution provided in the present application, the smoke exhaust structure 3 includes a filter element 32, and a portion of the filter element 32 is exposed in the smoke exhaust channel 3a. After the battery cell 2 undergoes thermal runaway, the high-temperature and high-pressure gas ejected from the first pressure relief portion 23 can enter the smoke exhaust channel 3a through the entrance of the smoke exhaust channel 3a, causing the pressure in the smoke exhaust channel 3a to rise sharply. Under the action of the internal and external pressure difference, the high-pressure flue gas in the smoke exhaust channel 3a can be easily discharged to the outside through the filter element 32. Under the filtering action of the filter element 32, particulate matter and toxic substances in the high-pressure flue gas can be filtered out, so that the exhausted smoke is clean smoke, which is not easy to cause harm to the driver and passengers in the cockpit, thereby improving the reliability of the smoke exhaust structure 3.

[0101] See also Figure 13 and Figure 14 In some embodiments, the filter element 32 forms a partial channel section of the smoke exhaust channel 3a.

[0102] The "smoke exhaust channel 3a" usually has a corresponding smoke exhaust extension path from the entrance to the exit, and the "partial channel section of the smoke exhaust channel 3a" refers to the partial channel section of the smoke exhaust channel 3a on its smoke exhaust extension path. It can also be understood that the filter 32 is located on the smoke exhaust extension path of the smoke exhaust channel 3a and is provided for the smoke exhaust channel 3a to pass through, so that the partial channel section of the smoke exhaust channel 3a is formed on the filter 32. In this way, the filter 32 can be located in the middle of the smoke exhaust channel 3a. In this case, the smoke exhaust structure 3 also needs to have two smoke exhaust members 31 that are connected to the two ends of the filter 32. The filter 32 can also be located at the end of the entrance or exit of the smoke exhaust channel 3a. In this case, the smoke exhaust structure 3 also needs to have a smoke exhaust member 31 that is connected to one end of the filter 32.

[0103] In the above technical solution, the filter element 32 forms a partial channel section of the smoke exhaust channel 3 a , so that smoke can be filtered and exhausted outward from all directions around the smoke exhaust channel 3 a to ensure the smoke filtering and exhaust efficiency of the filter element 32 .

[0104] As described above, in the existing battery device 100, the smoke exhaust structure 3 and the battery cell 2 are sealed by a sealing structure, but the sealing effect of the sealing structure is difficult to meet the requirements due to many reasons. Figure 13 and Figure 14 In some embodiments, the smoke exhaust structure 3 also includes a smoke exhaust member 31, which presses the filter member 32 along the first direction X and abuts the filter member 32 against the end cover 22; the smoke exhaust channel 3a has a first channel section 31a formed on the smoke exhaust member 31, and a second channel section 32a formed on the filter member 32, the first channel section 31a and the second channel section 32a are connected, and the entrance of the smoke exhaust channel 3a is formed at one end of the second channel section 32a facing away from the first channel section 31a.

[0105] "The smoke exhaust member 31", as the main structure of the smoke exhaust structure 3 other than the filter member 32, can press the filter member 32 along the first direction X, so that the filter member 32 abuts against the end cover 22. It is worth mentioning that the greater the pressing force exerted by the smoke exhaust member 31 on the filter member 32, the closer the filter member 32 abuts against the end cover 22, and the less likely it is for the high-pressure flue gas to overflow from the gap between the filter member 32 and the end cover 22. Regarding the installation base of the smoke exhaust member 31, this embodiment does not limit it. For example, the smoke exhaust member 31 can be installed on the horizontal and vertical beams of the battery device 100. It can be understood that the smoke exhaust passage 3a includes a first passage section 31a and a second passage section 32a. The inlet of the smoke exhaust passage 3a is formed in the second passage section 32a, then the outlet of the smoke exhaust passage 3a is usually formed in the first passage section 31a.

[0106] Combined with "the second passage section 32a is formed in the filter member 32" and "the inlet of the smoke exhaust passage 3a is formed at one end of the second passage section 32a facing away from the first passage section 31a", it can be understood that the filter member 32 is arranged around the first pressure relief portion 23 of the battery cell 2 and abuts against the end cover 22, so that the pressure relief portion is exposed in the second passage section 32a.

[0107] The above technical solution abandons the traditional method of setting a sealing structure between the smoke exhaust member 31 and the end cover 22. Instead of seeking to achieve complete sealing between the smoke exhaust member 31 and the end cover 22 of the battery cell 2, a filter member 32 is selected to be arranged between the smoke exhaust member 31 and the end cover 22 of the battery cell 2. The high-pressure flue gas that is originally difficult to be completely sealed and overflows is filtered by the filter member 32 and then actively discharged outward, further reducing the leakage of visible smoke.

[0108] Please refer to Figure 7 and Figure 12 , in some embodiments, the battery device 100 further includes a cooling device 33. The cooling device 33 is arranged in the first passage section 31a and is configured to discharge a coolant into the second passage section 32a when the first pressure relief portion 23 erupts.

[0109] The "cooling device 33" refers to a device that can cool the first pressure relief portion 23. The cooling device 33 generally cools the first pressure relief portion 23 by spraying a coolant. The spraying of the "coolant" can be executed actively or passively. For example, a temperature sensor is arranged in the smoke exhaust passage 3a. The temperature sensor is electrically connected to the cooling device 33 through a control device. When the temperature sensor senses high-temperature flue gas, it can feedback and control the cooling device 33 to spray the coolant through the control device. There are many specific structural types of the cooling device 33. Specifically, it can refer to the active fire extinguishing device for fire protection. This embodiment does not limit the specific composition of the coolant. The cooling device 33 can be arranged at any position in the first passage section 31a. Of course, it can be as Figure 12In the illustrated embodiment, the temperature reduction device 33 is disposed on the inner wall of the first channel section 31a opposite to the second channel section 32a in the first direction X.

[0110] In the above technical solution, a temperature reduction device 33 is provided in the first channel section 31a. When the first pressure relief portion 23 erupts, the temperature reduction device 33 can discharge the coolant into the second channel section 32a. The coolant can effectively reduce the temperature of the first pressure relief portion 23, thereby delaying the spread rate of the thermal runaway of the battery cell 2.

[0111] Please refer to Figure 12 and Figure 13 , in some embodiments, the temperature reduction device 33 includes a temperature reduction bag 33a. The temperature reduction bag 33a is disposed corresponding to the second channel section 32a along the first direction X. The temperature reduction bag 33a is used to fill the coolant and is configured to be melted under the action of the eruption of the first pressure relief portion 23.

[0112] This embodiment does not limit the specific material of the temperature reduction bag 33a, but the temperature reduction bag 33a should at least be melted under the action of the high-temperature flue gas erupting from the first pressure relief portion 23.

[0113] The purpose of defining that "the temperature reduction bag 33a is disposed corresponding to the second channel section 32a along the first direction X" is that when the first pressure relief portion 23 erupts, the high-temperature and high-pressure flue gas can directly act on the temperature reduction bag 33a in the first channel section 31a through the second channel section 32a, thereby melting the temperature reduction bag 33a. The coolant filled in the temperature reduction bag 33a can flow out and enter the second channel section 32a, thereby cooling the first pressure relief portion 23.

[0114] In some embodiments, a plurality of battery cells 2 are arranged in the second direction Y. The filter element 32 is formed with a plurality of second channel sections 32a. The plurality of second channel sections 32a are respectively disposed corresponding to the first pressure relief portions 23 of the plurality of battery cells 2; wherein, the first channel section 31a and the temperature reduction bag 33a respectively extend along the second direction Y and are disposed corresponding to the plurality of second channel sections 32a.

[0115] The above embodiments have defined that the first channel section 31a communicates with the second channel section 32a. On this basis, this embodiment defines a plurality of second channel sections 32a. Without a doubt, the plurality of second channel sections 32a should respectively communicate with the first channel section 31a.

[0116] In the above technical solution, the temperature reduction bag 33a is disposed to extend along the second direction Y. When the first pressure relief portion 23 of any one or more of the plurality of battery cells 2 erupts, the corresponding position on the temperature reduction bag 33a can be melted, thereby cooling the erupting first pressure relief portion 23. With such a setting, the temperature reduction bag 33a can provide temperature reduction guarantee for the first pressure relief portion 23 of each battery cell 2.

[0117] See also Figures 14 to 15 In some embodiments, the smoke exhaust element 31 has a pressing end surface 312b, which is arranged to abut the filter element 32, and the opening for connecting the first channel section 31a and the second channel section 32a is arranged on the pressing end surface 312b; the pressing end surface 312b forms a limiting protrusion 312c, which surrounds the opening of the first channel section 31a and extends into the second channel section 32a of the filter element 32.

[0118] Since the first channel section 31a and the second channel section 32a are formed on the smoke exhaust member 31 and the filter member 32 respectively, and the first channel section 31a and the second channel section 32a are connected to each other, the first channel section 31a has a corresponding opening on at least the smoke exhaust member 31, and is connected to the second channel section 32a through the opening; the smoke exhaust member 31 has a pressing end surface 312b, and applies a pressing force to the filter member 32 through the pressing end surface 312b, and the opening corresponding to the first channel section 31a is opened on the pressing end surface 312b. A limiting protrusion 312c is provided, which can extend into the second channel section 32a, which is equivalent to the filter element 32 being sleeved on the limiting protrusion 312c through the second channel section 32a. On the one hand, the limiting protrusion 312c can effectively limit the displacement of the filter element 32, and on the other hand, the limiting protrusion 312c can also play a role in propping up the second channel section 32a to prevent the second channel section 32a from collapsing after the filter element 32 is compressed by the smoke exhaust element 31, thereby ensuring the smooth flow of the smoke exhaust channel 3a.

[0119] In some embodiments, the filter element 32 is bonded to the pressing end surface 312b.

[0120] In the above technical solution, the filter element 32 is bonded to the holding end surface 312b, so that the filter element 32 and the smoke exhaust element 31 can be transported and assembled as a whole, and can also prevent the filter element 32 from deviating from its position during use, which is beneficial to ensuring the filtering reliability of the filter element 32.

[0121] In other embodiments, the filter element 32 is bonded to the end cover 22 .

[0122] In the above technical solution, the filter element 32 is bonded to the end cover 22, which is conducive to eliminating the gap between the filter element 32 and the end cover 22, and reducing the occurrence of high-pressure flue gas leaking out from the gap between the filter element 32 and the end cover 22 without being filtered.

[0123] It should be noted that the above two parallel technical features "the filter element 32 is bonded to the holding end surface 312b" and "the filter element 32 is bonded to the end cover 22" can be set either one or at the same time. Obviously, more beneficial effects can be obtained when they are set at the same time.

[0124] In some embodiments, the filter element 32 is provided as a filter foam 321.

[0125] The "filter foam 321" is usually made of porous polymer foam (such as polyurethane PU, polyester PE, silica gel, etc.), and has characteristics such as air permeability, flame retardancy, and chemical corrosion resistance.

[0126] In the above technical solution, the filter element 32 is provided as the filter foam 321. Since the density of the filter foam 321 is usually low, it is beneficial to control the overall mass of the smoke exhaust structure 3. Moreover, the filter foam 321 usually also has a certain elastic deformation ability, which is beneficial to maintaining sufficient contact sealing performance between the filter foam 321 and other structural components of the smoke exhaust structure 3, thereby reducing the situation of high-pressure flue gas escaping without filtration.

[0127] Specifically, in combination with the above "cooling bag 33a" solution, the coolant ejected by melting the cooling bag 33a can cool the first pressure relief part 23, and can also be absorbed by the filter foam 321, thereby preventing the cooling liquid from flowing turbulently.

[0128] Please refer to Figures 9 to 11 , in some embodiments, the smoke exhaust structure 3 is provided with a smoke exhaust nozzle 311b at the outlet of the smoke exhaust passage 3a, and a second pressure relief part 34 is arranged in the smoke exhaust nozzle 311b.

[0129] The "second pressure relief part 34" is arranged in the smoke exhaust nozzle 311b. When the pressure in the smoke exhaust passage 3a rises sharply due to the eruption of the first pressure relief part 23 of the battery cell 2 and reaches the threshold value of the second pressure relief part 34, the second pressure relief part 34 can actively open and release the internal pressure of the smoke exhaust passage 3a. The specific structure of the second pressure relief part 34 is not limited in this embodiment.

[0130] In the above technical solution, after the battery cell 2 has a thermal runaway, the high-pressure flue gas discharged from the first pressure relief part 23 will cause the pressure in the smoke exhaust passage 3a to rise sharply. Due to the presence of the filter element 32, a part of the high-pressure flue gas can be filtered out, so that the rising rate of the pressure in the smoke exhaust passage 3a can be delayed, and the second pressure relief part 34 can retain the high-temperature and high-pressure flue gas in the smoke exhaust passage 3a for a longer time, thereby giving the vehicle occupants more time to react and escape.

[0131] Please refer to Figures 7 to 9 , in some embodiments, the smoke exhaust part 31 includes a first structural part 311 and a second structural part 312. The first structural part 311 and the second structural part 312 are arranged along the first direction X and jointly define a first channel segment 31a. The opening where the first channel segment 31a communicates with the second channel segment 32a is formed in the second structural part 312; wherein, the second structural part 312 is arranged to press the filter element 32.

[0132] "The first structural part 311 and the second structural part 312 jointly define a first channel section 31a", which includes that "concave cavities are formed at opposite ends of the first structural part 311 and the second structural part 312. After the first structural part 311 and the second structural part 312 are combined in the first direction X, the two concave cavities are connected and combined into the first channel section 31a", "concave cavities are formed at the ends of the first structural part 311 facing the second structural part 312. After the second structural part 312 is used as a cover plate and combined with the first structural part 311 in the first direction X, the concave cavities are covered to form the first channel section 31a", and "concave cavities are formed at the ends of the second structural part 312 facing the first structural part 311. After the first structural part 311 is used as a cover plate and combined with the second structural part 312 in the first direction X, the concave cavities are covered to form the first channel section 31a".

[0133] Compared with the solution where the first structural part 311 and the second structural part 312 are integrally connected (in this solution, the first channel section 31a is usually formed only by casting), in the above technical solution, the smoke exhaust part 31 is arranged to be composed of the first structural part 311 and the second structural part 312. By jointly defining the first channel section 31a by the first structural part 311 and the second structural part 312, the first channel section 31a can be formed in a simpler way (such as ordinary demoulding molding), and the first channel section 31a has higher processing accuracy.

[0134] Please refer to Figures 10 to 11 , in some embodiments, one of the first structural part 311 and the second structural part 312 forms an annular groove 312d, and the other forms an annular protrusion 311c. The annular protrusion 311c surrounds the first channel section 31a and is embedded in the annular groove 312d.

[0135] The above technical solution includes two solutions: "the first structural part 311 forms an annular groove 312d and the second structural part 312 forms an annular protrusion 311c" and "the second structural part 312 forms an annular groove 312d and the first structural part 311 forms an annular protrusion 311c". Since the first structural part 311 and the second structural part 312 are arranged in the first direction X and are connected by the annular protrusion 311c and the annular groove 312d, it can be understood that the annular protrusion 311c and the annular groove 312d extend along the circumferential side of the axis in the first direction X.

[0136] In the above technical solution, the first structural part 311 and the second structural part 312 can achieve structural connection through the engagement of the annular groove 312d and the annular protrusion 311c. Since the annular protrusion 311c surrounds the first channel section 31a, it also has the function of sealing the first channel section 31a.

[0137] In some embodiments, a sealant is further provided between the annular protrusion 311c and the wall of the annular groove 312d.

[0138] There are many types of "sealant", such as silicone sealant, polyurethane sealant, epoxy resin sealant, etc. The specific type of sealant is not limited in this embodiment. Although the sealant is not shown in Figure 7 it exists in the actual product.

[0139] In the above technical solution, by providing the sealant, the gap between the annular protrusion 311c and the wall of the annular groove 312d can be eliminated, thereby further improving the sealing performance between the first structural part 311 and the second structural part 312.

[0140] Please refer to Figure 11 and Figure 12 In some embodiments, a partial area of the first structural part 311 is recessed away from the second structural part 312, and a smoke exhaust protrusion 311a is formed on the side away from the second structural part 312. A smoke exhaust nozzle 311b is provided on the smoke exhaust protrusion 311a. The smoke exhaust nozzle 311b communicates with the first channel section 31a and extends along the second direction Y.

[0141] "A partial area of the first structural part 311 is recessed away from the second structural part 312", this partial area presents as a groove on the side of the first structural part 311 facing the second structural part 312, as shown in Figure 12 and presents as a smoke exhaust protrusion 311a on the side away from the second structural part 312. This partial area can be at any position on the first structural part 311, and of course can also be at the end in the second direction Y as shown in Figure 11 .

[0142] In the above technical solution, by connecting the smoke exhaust nozzle 311b to the first channel section 31a and extending it along the second direction Y, the smoke exhaust direction of the smoke exhaust structure 3 can be changed to the second direction Y, thereby reducing the space occupied by the smoke exhaust structure 3 in the first direction X of the battery device 100. Moreover, since the smoke exhaust nozzle 311b is provided on the smoke exhaust protrusion 311a, and the smoke exhaust protrusion 311a is formed by the partial area of the first structural part 311 being recessed away from the second structural part 312, the flue gas in the first channel section 31a can more easily enter the smoke exhaust protrusion 311a and reach the smoke exhaust nozzle 311b, which is beneficial to reducing the smoke exhaust resistance of the smoke exhaust channel 3a.

[0143] Please refer to Figure 8 and Figure 9 In some embodiments, the second structural part 312 is provided as a wire harness board 312a.

[0144] "The wire harness board 312a" refers to an integrated structural component within the battery device 100 for fixing, protecting, and arranging high-voltage wire harnesses, low-voltage signal lines, and communication cables in an orderly manner. It is usually made of insulating and flame-retardant materials (such as fiberglass-reinforced plastics, PC / ABS, etc.).

[0145] In the above technical solution, the second structural part 312 is set as the wire harness board 312a, so that the wire harness board 312a is integrated on the smoke exhaust structure 3. The smoke exhaust structure 3 can not only exhaust smoke outward directionally through its smoke exhaust channel 3a, but also manage high-voltage wire harnesses, low-voltage signal lines, communication cables, etc. within the battery device 100 through the wire harness board 312a.

[0146] Please refer to Figures 3 to 5 , in some embodiments, a plurality of battery cells 2 are arranged along the second direction Y. A heat exchange partition 4 is arranged between two adjacent battery cells 2. At least one end of at least part of the heat exchange partitions 4 close to the end cover 22 is provided with a first locking part 41; at least one of the first structural part 311 and the second structural part 312 is connected to the first locking part 41.

[0147] "The heat exchange partition 4" refers to a partition structure that can perform heat exchange with adjacent battery cells 2. The functions of the heat exchange partition 4 in the embodiments of the present application include at least one of cooling and heating. Its functions can be specifically realized through the circulation of heat exchange liquid or through the circulation of heat exchange air flow. The specific structure and heat exchange method of the heat exchange partition 4 in this embodiment are not limited.

[0148] Since a plurality of battery cells 2 are provided, then a plurality of heat exchange partitions 4 will also be provided. "At least one end of at least part of the heat exchange partitions 4 close to the end cover 22 is provided with a first locking part 41" means that among the plurality of heat exchange partitions 4, only one heat exchange partition 4 may be provided with the first locking part 41, or two or more heat exchange partitions 4 may be provided with the first locking part 41. There are many structural types of the "first locking part 41". In some examples, the first locking part 41 includes an injection molding matrix made of the same material as the heat exchange partition 4, and a nut is embedded in the injection molding matrix. The first locking part 41 is connected to a bolt on the first structural part 311 or the second structural part 312 through this nut.

[0149] "At least one of the first structural part 311 and the second structural part 312 is connected to the first locking part 41" means that only the first structural part 311 can be connected to the first locking part 41, or only the second structural part 312 can be connected to the first locking part 41, or both the first structural part 311 and the second structural part 312 can be connected to the first locking part 41 simultaneously.

[0150] In the above technical solution, by providing a first locking portion 41 at one end of the heat exchange partition plate 4 close to the end cover 22, the first locking portion 41 can provide an installation basis for the first structural portion 311 and the second structural portion 312, thereby improving the structural stability of the battery device 100.

[0151] Specifically, in Figure 11 and Figure 12 In the illustrated embodiment, ear plates 311d are formed on the peripheral side of the first structural portion 311, and the first structural portion 311 is locked and connected to the first locking portion 41 through the ear plates 311d.

[0152] Please refer to Figure 3 and Figure 4 , in some embodiments, a plurality of heat exchange partition plates 4 include a first partition plate 4a at the middle position, and at least the first locking portion 41 is provided on the first partition plate 4a; the thickness of the first partition plate 4a along the second direction Y is greater than that of the remaining heat exchange partition plates 4.

[0153] Since a plurality of battery cells 2 are arranged along the second direction Y, and the smoke exhaust member 31 needs to be provided corresponding to the first pressure relief portions 23 of the plurality of battery cells 2, the smoke exhaust member 31 has a relatively large span in the second direction Y. In the above technical solution, the heat exchange partition plate 4 at the middle position among the plurality of heat exchange partition plates 4 is set as the first partition plate 4a. Since the first partition plate 4a is provided with the first locking portion 41, it can provide an installation basis for the first structural portion 311 or the second structural portion 312 in the smoke exhaust member 31. Since the thickness of the first partition plate 4a along the second direction Y is greater than that of the remaining heat exchange partition plates 4, the first partition plate 4a can bear a greater locking pressure, and the smoke exhaust member 31 can obtain a more stable installation basis through the first locking portion 41 on the first partition plate 4a.

[0154] In other embodiments, a plurality of heat exchange partition plates 4 include a first partition plate 4a at the middle position, and at least the first locking portion 41 is provided on the first partition plate 4a; the material of the first partition plate 4a is a metal material.

[0155] In the above technical solution, the heat exchange partition plate 4 at the middle position among the plurality of heat exchange partition plates 4 is set as the first partition plate 4a. Since the first partition plate 4a is provided with the first locking portion 41, it can provide an installation basis for the first structural portion 311 or the second structural portion 312 in the smoke exhaust member 31. Since the material of the first partition plate 4a is a metal material, the first partition plate 4a can bear a greater locking pressure, and the smoke exhaust member 31 can obtain a more stable installation basis through the first locking portion 41 on the first partition plate 4a.

[0156] It should be noted that the above two parallel technical features, "the thickness of the first partition plate 4a in the second direction Y is greater than that of the other heat exchange partition plates 4" and "the material of the first partition plate 4a is a metal material", can be set alternatively or simultaneously. Obviously, more beneficial effects can be obtained when they are set simultaneously.

[0157] Please refer to Figure 3 , in some embodiments, a plurality of battery cells 2 are arranged along the second direction Y. End plates 5 are further provided at both ends of the plurality of battery cells 2 along the second direction Y. A second locking portion 51 is provided at one end of the end plate 5 close to the end cover 22; at least one of the first structural portion 311 and the second structural portion 312 is connected to the second locking portion 51.

[0158] There are many structural types of the "second locking portion 51". In some examples, the second locking portion 51 includes an injection molding matrix made of the same material as the end plate 5, and a nut is embedded in the injection molding matrix. The second locking portion 51 is connected to a bolt on the first structural portion 311 or the second structural portion 312 through the nut. In other examples, the second locking portion 51 includes a threaded hole provided in the end plate 5, and the threaded hole is connected to a bolt on the first structural portion 311 or the second structural portion 312.

[0159] During the charging and discharging process of the battery device 100, the battery cells 2 usually undergo thermal expansion, which is harmful to the battery device 100. In the above technical solution, end plates 5 are further provided at both ends of the plurality of battery cells 2 along the second direction Y, and the end plates 5 can play a certain role in suppressing the thermal expansion of the battery cells 2; moreover, a second locking portion 51 is provided at one end of the end plate 5 close to the end cover 22, and the second locking portion 51 can provide an installation basis for the first structural portion 311 and the second structural portion 312, thereby improving the structural stability of the battery device 100.

[0160] The present application also proposes an electrical device, which includes a battery device 100 for providing electrical energy. The specific structure of the battery device 100 refers to the above embodiments. Since this electrical device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the battery device 100 is used to provide electrical energy for the electrical device. The electrical device includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid vehicles, and range-extended vehicles, and may also include aircraft such as electric drones and electric passenger aircraft.

[0161] The present application provides a battery device 100, which includes a plurality of battery cells 2 and a smoke exhaust structure 3. A plurality of battery cells 2 are arranged along the second direction Y. Each battery cell 2 includes a housing 21 and an end cover 22. The end cover 22 covers the housing 21 along the first direction X. The end cover 22 is provided with a first pressure relief portion 23. A heat exchange partition 4 is arranged between two adjacent battery cells 2. At least one end of the heat exchange partition 4 close to the end cover 22 is provided with a first locking portion 41. The smoke exhaust structure 3 forms a smoke exhaust passage 3a, which includes a first passage segment 31a and a second passage segment 32a. The smoke exhaust structure 3 includes a smoke exhaust member 31 and a filter member 32. The smoke exhaust member 31 includes a first structural portion 311 and a second structural portion 312. The first structural portion 311 and the second structural portion 312 are arranged along the first direction X and jointly define the first passage segment 31a. The second structural portion 312 has a pressing end face 312b facing the end cover 22 of the battery cell 2. The pressing end face 312b presses the filter member 32 along the first direction X and abuts the filter member 32 against the end cover 22 of the battery cell 2. The filter member 32 forms a plurality of second passage segments 32a, and the plurality of second passage segments 32a are respectively arranged corresponding to the first pressure relief portions 23 of the plurality of battery cells 2. The first passage segment 31a has a plurality of openings at the pressing end face 312b. The first passage segment 31a is communicated with the second passage segment 32a through the openings. A cooling bag 33a is arranged in the first passage segment 31a. The cooling bag 33a extends along the second direction Y and is arranged corresponding to the plurality of second passage segments 32a along the first direction X. The cooling bag 33a is used to fill with coolant and is configured to be able to be melted under the eruption action of the first pressure relief portion 23. The pressing end face 312b forms a limiting protrusion 312c. The limiting protrusion 312c surrounds the opening of the first passage segment 31a and extends into the second passage segment 32a. At least one of the first structural portion 311 and the second structural portion 312 is connected to the first locking portion 41. One of the first structural portion 311 and the second structural portion 312 forms an annular groove 312d, and the other forms an annular protrusion 311c. The annular protrusion 311c surrounds the first passage segment 31a and is embedded in the annular groove 312d. A sealant is also arranged between the annular protrusion 311c and the groove wall of the annular groove 312d. A partial area of the first structural portion 311 is recessed away from the second structural portion 312 and forms a smoke exhaust protrusion 311a on the side away from the second structural portion 312. The smoke exhaust protrusion 311a is provided with a smoke exhaust nozzle 311b. The smoke exhaust nozzle 311b is communicated with the first passage segment 31a and extends along the second direction Y. A second pressure relief portion 34 is arranged in the smoke exhaust nozzle 311b. The second structural portion 312 is set as a wire harness board 312a. The filter member 32 is set as a filter foam 321.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery cell, including a housing and an end cap, the end cap covering the housing along a first direction, and the end cap being provided with a first pressure relief portion; And A smoke exhaust structure, disposed on the end cap, the smoke exhaust structure forming a smoke exhaust passage, an inlet of the smoke exhaust passage being correspondingly disposed with respect to the first pressure relief portion, and an outlet of the smoke exhaust passage being configured to communicate with the outside; The smoke exhaust structure includes a filter element, a part of the filter element being exposed in the smoke exhaust passage, and the filter element being configured to allow a part of the flue gas in the smoke exhaust passage to be discharged to the outside after passing through its own filtration.

2. The battery device according to claim 1, wherein The filter element forms a partial passage section of the smoke exhaust passage.

3. The battery device according to claim 2, characterized in that, The smoke exhaust structure further includes a smoke exhaust member, the smoke exhaust member pressing the filter element along the first direction and abutting the filter element against the end cap; The smoke exhaust passage has a first passage section formed in the smoke exhaust member and a second passage section formed in the filter element, the first passage section and the second passage section being communicatively arranged, and an inlet of the smoke exhaust passage being formed at one end of the second passage section facing away from the first passage section.

4. The battery device according to claim 3, characterized in that, The battery device further includes a cooling device, the cooling device being disposed in the first passage section and being configured to discharge a coolant to the second passage section when the first pressure relief portion erupts.

5. The battery device according to claim 4, characterized in that, The cooling device includes a cooling bag, the cooling bag being correspondingly disposed with respect to the second passage section along the first direction, the cooling bag being used to fill a coolant therein and being configured to be melted under the eruption action of the first pressure relief portion.

6. The battery device according to claim 5, wherein, A plurality of battery cells are arranged along a second direction, the filter element forms a plurality of second passage sections, and the plurality of second passage sections are respectively correspondingly disposed with respect to the first pressure relief portions of the plurality of battery cells; Wherein, the first passage section and the cooling bag respectively extend along the second direction and are correspondingly disposed with respect to the plurality of second passage sections.

7. The battery device according to claim 3, wherein The smoke exhaust member has a pressing end face, the pressing end face abutting against the filter element, and an opening where the first passage section and the second passage section communicate is disposed on the pressing end face; The pressing end face forms a limiting protrusion, the limiting protrusion surrounding the opening of the first passage section and extending into the second passage section of the filter element.

8. The battery device according to claim 7, characterized in that, The filter element is adhesively disposed with the pressing end face; and / or The filter element is adhesively disposed with the end cap.

9. The battery device according to any one of claims 1 to 8, characterized in that, The filter element is provided as filter foam.

10. The battery device according to any one of claims 1 to 8, characterized in that, The smoke exhaust structure is provided with a smoke exhaust nozzle at the outlet of the smoke exhaust passage, and a second pressure relief portion is disposed in the smoke exhaust nozzle.

11. The battery device according to any one of claims 3 to 8, characterized in that, The smoke exhaust member includes a first structural portion and a second structural portion, the first structural portion and the second structural portion being arranged along the first direction and jointly defining the first passage section, and an opening where the first passage section and the second passage section communicate is formed in the second structural portion; Wherein, the second structural portion presses the filter element.

12. The battery device according to claim 11, wherein One of the first structural portion and the second structural portion forms an annular groove, and the other forms an annular protrusion, the annular protrusion surrounding the first passage section and being embedded in the annular groove.

13. The battery device according to claim 12, wherein A sealant is further disposed between the annular protrusion and the groove wall of the annular groove.

14. The battery device according to claim 11, wherein, A local area of the first structural part is recessed away from the second structural part, and a smoke exhaust protrusion is formed on a side away from the second structural part. The smoke exhaust protrusion is provided with a smoke exhaust nozzle, and the smoke exhaust nozzle communicates with the first channel section and extends along a second direction.

15. The battery device according to claim 11, characterized in that, The second structural part is arranged as a wire harness board.

16. The battery device according to claim 11, wherein, A plurality of the battery cells are arranged in a row along the second direction. A heat exchange partition is arranged between two adjacent battery cells, and at least a part of one end of the heat exchange partition close to the end cover is provided with a first locking part; At least one of the first structural part and the second structural part is connected to the first locking part.

17. The battery device according to claim 16, wherein The plurality of heat exchange partitions include a first partition plate at a middle position, and at least the first locking part is arranged on the first partition plate; The thickness of the first partition plate along the second direction is greater than that of the other heat exchange partitions; And / or The material of the first partition plate is a metal material.

18. The battery device according to claim 11, wherein, A plurality of the battery cells are arranged in a row along the second direction. End plates are further arranged at both ends of the plurality of battery cells along the second direction, and a second locking part is arranged at one end of the end plate close to the end cover; At least one of the first structural part and the second structural part is connected to the second locking part.

19. An electrical device, characterized in that, A battery device according to any one of claims 1 to 18 is included.

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