Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, a battery monomer and a battery management assembly, the battery monomers are arranged in the box body; the battery management assembly is arranged in the box body. The battery management assembly comprises a shell, a circuit board and a smoke sensor. The circuit board and the smoke sensor are arranged in the shell. The smoke sensor is electrically connected with the circuit board. The smoke sensor comprises a first ventilation opening and a second ventilation opening. And the first air vent and the second air vent are communicated with the space in the box body. One of the first air vent and the second air vent is an air inlet, and the other one is an air outlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery device technology is an important factor for its development. In the development of battery device technology, how to improve the safety of battery device has always been a research direction in battery device technology. CONTENT OF THE INVENTION

[0003] In view of the above problems, the present application provides a battery device and a power utilization device, which is beneficial to improve the safety of the battery device.

[0004] The present application provides a battery device, which comprises a box body, a battery monomer and a battery management assembly.

[0005] The battery monomer is arranged in the box body. The battery management assembly is arranged in the box body. The battery management assembly comprises a shell, a circuit board and a smoke sensor. The circuit board and the smoke sensor are arranged in the shell. The smoke sensor is electrically connected with the circuit board. The smoke sensor comprises a first air inlet and a second air inlet. The first air inlet and the second air inlet are in communication with the space in the box body. One of the first air inlet and the second air inlet is an air inlet, and the other is an air outlet.

[0006] The smoke sensor of the present application is integrated into the battery management assembly. When assembling the battery device, the battery management assembly comprising the smoke sensor can be installed and fixed as a whole, so that the smoke sensor does not need to be installed and fixed separately, which is beneficial to reduce the assembly complexity and improve the assembly convenience of the battery device. The smoke sensor can multiplex the board surface and the circuit of the circuit board, thereby improving the utilization rate of the circuit board. When the battery monomer is in thermal runaway, the smoke sensor in the battery management assembly can timely and accurately detect the smoke released by the battery monomer into the box body and alarm, which is beneficial to improve the safety of the battery device.

[0007] In some realizable modes, the smoke sensor comprises a shell assembly, and the circuit board and the shell assembly are detachably connected.

[0008] In some realizable modes, one of the circuit board and the shell assembly is provided with a locking portion, and the other is provided with a locking portion, and the locking portion and the locking portion are locked or unlocked to connect or separate the smoke sensor and the circuit board.

[0009] When the circuit board and the flue gas sensor are assembled, the locking portion and the locking portion are locked with each other to fix the position of the flue gas sensor. When the circuit board and the flue gas sensor are separated, the locking portion and the locking portion are unlocked with each other to release the restriction on the flue gas sensor. The circuit board and the shell assembly are connected or separated through the locking portion and the locking portion, so that the circuit board and the shell assembly can be connected without additional connectors, which helps to reduce the number of parts, reduce the complexity of the connection or separation operation between the circuit board and the shell assembly, and improve the efficiency of the connection or separation operation between the circuit board and the shell assembly.

[0010] In some possible implementations, the locking portion includes a first clamping portion, and the locking portion includes a second clamping portion. The first clamping portion and the second clamping portion are locked or unlocked.

[0011] The locking portion and the locking portion are connected or separated through clamping, which helps to ensure the stability of the connection between the locking portion and the locking portion, and the connection between the locking portion and the locking portion is not easy to separate. At the same time, the connection mode between the locking portion and the locking portion is simple and easy to operate, which helps to improve the connection or separation operation efficiency between the locking portion and the locking portion.

[0012] In some possible implementations, the outer surface of the shell is provided with a recess, and the first air inlet is in communication with the recess.

[0013] The recess has the ability to guide the flow of flue gas. When the battery monomer is in thermal runaway, the flow direction of the generated flue gas in the space of the box is not fixed. In the embodiment in which the first air inlet is an air inlet, the recess can guide the flue gas to flow more quickly and accurately to the first air inlet and enter the flue gas sensor from the first air inlet, so as to ensure that the flue gas sensor detects the flue gas in the box in time and accurately, and help to improve the response rate of the flue gas sensor. In the embodiment in which the first air inlet is an air outlet, the recess can guide the flue gas to be discharged more quickly into the space in the box, reducing the possibility that the flue gas in the flue gas sensor is blocked and causes inaccurate detection results.

[0014] In some possible implementations, the shell is provided with a first hole and a second hole, the first air inlet, the first hole, the recess and the space in the box are in communication, and the second air inlet, the second hole and the space in the box are in communication.

[0015] The first hole is in communication with the recess. After the overall structure composed of the circuit board and the flue gas sensor and the shell are assembled, the first hole and the first air inlet are in the same position and aligned with each other, and the second hole and the second air inlet are in the same position and aligned with each other. The shell does not block the first air inlet and the second air inlet, ensuring that the flue gas sensor circulates the flue gas smoothly through the first air inlet and the second air inlet.

[0016] In some possible implementations, the shell has a convex portion located at one side of the concave portion, and an inner side of the convex portion forms a concave cavity, and at least part of the flue gas sensor is located in the concave cavity.

[0017] The shell has a relatively large thickness at the position of the convex portion, so as to facilitate the shell to avoid the flue gas sensor and provide installation space for the flue gas sensor. The shell has a relatively large thickness at the position of the convex portion and a relatively small thickness at a region outside the convex portion, so as to facilitate reduction of the overall volume of the shell and reduction of the space occupancy of the shell in the cabinet.

[0018] The flue gas sensor is located in the concave cavity, so that the shell can limit and constrain the flue gas sensor, and the possibility of shaking or position deviation of the flue gas sensor in the shell is reduced.

[0019] In some possible implementations, the shell includes a bottom shell and a top cover, the circuit board is arranged on the bottom shell, and the bottom shell and the top cover are detachably connected. The top cover is provided with the concave portion, the first hole, the second hole and the convex portion.

[0020] During assembly of the circuit board, the flue gas sensor and the shell, the circuit board and the bottom shell can be connected and fixed after the flue gas sensor and the circuit board are assembled, and then the top cover is buckled to the bottom shell and connected and fixed with the bottom shell. The assembly process of the circuit board, the flue gas sensor and the shell is easy to operate, and the assembly convenience is improved.

[0021] In some possible implementations, the flue gas sensor includes a light emitting element and a light receiving element, the shell assembly includes a first shell and a second shell, the first shell is connected with the circuit board, the first shell and the second shell are connected to form a containing space, an emitting part of the light emitting element and a receiving part of the light receiving element are located in the containing space, the light emitting element and the light receiving element are electrically connected with the circuit board, the first shell is provided with the second air hole, and the second shell is provided with the first air hole.

[0022] The circuit board can supply power to the light emitting element and the light receiving element. In the case that the battery device works normally, the emitting part of the light emitting element can continuously emit light to the internal space of the flue gas sensor, but the receiving part of the light receiving element cannot receive light. When thermal runaway occurs in the battery monomer and flue gas is generated, the flue gas can enter the flue gas sensor. Since the flue gas has a scattering effect on light, the receiving part can receive scattered light, so that the flue gas sensor can detect the presence of flue gas in the cabinet. The receiving part can generate a photoelectric current after receiving the light, so as to realize conversion of the optical signal to the electrical signal. The receiving part transmits the electrical signal to the circuit board.

[0023] The flue gas sensor adopts the cooperation mode of the light emitting element and the light receiving element, which is beneficial to improve the flue gas detection accuracy and response rate and reduce the possibility of misjudgment or untimely response.

[0024] In some possible implementation manners, the first shell comprises a pin opening, the light emitting member and the light receiving member each comprise a connecting pin, the connecting pin passes through the pin opening and is electrically connected with the circuit board, and the second shell comprises a limiting block, at least part of the limiting block is located in the pin opening, and the limiting block limits the connecting pin.

[0025] In the process of assembling the light emitting member and the light receiving member with the first shell respectively, the connecting pin of each of the light emitting member and the light receiving member can be aligned with and inserted into the corresponding pin opening. The first shell can limit and constrain the light emitting member and the light receiving member through the connecting pin, so that the mounting positions of the light emitting member and the light receiving member are not prone to deviation in the process of assembling the first shell and the second shell, and the position accuracy of the light emitting member and the light receiving member is ensured to meet the requirements. After the light emitting member and the light receiving member are assembled with the first shell respectively, the connecting pin of each of the light emitting member and the light receiving member can be led out of the corresponding pin opening.

[0026] After the first shell and the second shell are assembled, the limiting block limits the connecting pin, thereby facilitating reduction of the possibility of shaking or deviation of the connecting pin, and ensuring that the position accuracy of the light emitting member and the light receiving member meets the requirements.

[0027] If the light emitting member and the light receiving member deviate from the predetermined positions, the light propagation path between the light emitting member and the light receiving member will change, and the light receiving member may not receive the light emitted by the light emitting member, which leads to false judgment or failure of the smoke sensor to detect the smoke in time. In the embodiments of the present application, the first shell and the second shell limit and constrain the light emitting member and the light receiving member through the connecting pin, which is beneficial to solve the above technical problems.

[0028] In some possible implementation manners, the first shell comprises a bottom wall, a first wall body and a second wall body, the bottom wall is provided with a second air vent, the first wall body and the second wall body are connected to the bottom wall, the first wall body and the second wall body are located on two sides of the second air vent respectively, the first wall body is close to the circuit board, and the smoke sensor comprises a first light blocking member, the first light blocking member is located in the first shell and is arranged on the first wall body.

[0029] In the case that the battery device works normally, the emitting part of the light emitting member can continuously emit light to the internal space of the smoke sensor. The first light blocking member can block the light emitted by the emitting part from directly entering the receiving part of the light receiving member, thereby reducing the possibility of false alarm of the smoke sensor caused by the light directly entering the receiving part.

[0030] In some possible implementation manners, the first shell includes a bottom wall, a first wall body and a second wall body, the bottom wall is provided with the second air vent, the first wall body and the second wall body are connected to the bottom wall, the first wall body and the second wall body are located on two sides of the second air vent respectively, and the second wall body is away from the circuit board. The smoke sensor includes a second light blocking piece, and the second light blocking piece is located in the first shell and arranged on the second wall body.

[0031] In the case that the battery device works normally, the emitting part of the light emitting piece can continuously emit light to the internal space of the smoke sensor. The second light blocking piece can block the light emitted by the emitting part from directly entering the receiving part of the light receiving piece after being reflected by the second wall body, thereby reducing the possibility of false alarm of the smoke sensor caused by the light directly entering the receiving part.

[0032] In some possible implementation manners, the included angle between the optical axis of the light emitting piece and the optical axis of the light receiving piece ranges from 100° to 120°.

[0033] In the case that the smoke sensor is in the smoke, after the light emitted by the light emitting piece is scattered by the smoke, the scattered light can enter the light receiving piece more, which is beneficial to improve the detection sensitivity of the smoke sensor.

[0034] In some possible implementation manners, one of the first shell and the second shell is provided with a third clamping part, and the other is provided with a fourth clamping part. The third clamping part and the fourth clamping part are locked or unlocked to connect or separate the first shell and the second shell.

[0035] The first shell and the second shell are connected or separated by clamping, which is beneficial to ensure the stability of the connection between the first shell and the second shell and the difficulty of separation between them. Meanwhile, the connection between the first shell and the second shell is simple and easy to operate, and the operation efficiency of the connection or separation between the first shell and the second shell is improved.

[0036] In some possible implementation manners, at least one of the first air vent and the second air vent is a bar grating hole including a bar grating.

[0037] In the process of assembling the circuit board, the smoke sensor and the shell, the bar grating hole can effectively block the relatively large objects from entering the internal space of the smoke sensor, thereby effectively reducing the possibility of affecting the detection sensitivity and detection accuracy of the smoke sensor due to the objects entering the internal space of the smoke sensor.

[0038] The application provides a kind of power utilization device, it includes the battery device described above. The battery device is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in

[0040] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0041] Figure 2 is a partial structural schematic diagram of a battery device provided by an embodiment of the present application;

[0042] Figure 3 is a structural schematic diagram of a battery module provided by an embodiment of the present application;

[0043] Figure 4 is a partial structural schematic diagram of a battery cell provided by an embodiment of the present application;

[0044] Figure 5 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0045] Figure 6 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0046] Figure 7 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0047] Figure 8 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0048] Figure 9 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0049] Figure 10 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0050] Figure 11 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0051] Figure 12 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0052] Figure 13 is a partial structural schematic diagram of a battery management assembly provided by an embodiment of the present application;

[0053] Figure 14A partial structural schematic view of a smoke sensor provided by an embodiment of the present application is shown in FIG. 1.

[0054] Figure 15 A partial structural schematic view of a first shell provided by an embodiment of the present application is shown in FIG. 2.

[0055] Figure 16 A partial structural schematic view of a smoke sensor provided by an embodiment of the present application is shown in FIG. 3.

[0056] Figure 17 A partial structural schematic view of a second shell provided by an embodiment of the present application is shown in FIG. 4.

[0057] Legend of reference signs:

[0058] 1, vehicle; 10, battery device; 10a, box body; 10b, first box body part; 10c, second box body part; 11, controller; 12, motor; 20, battery module; 30, battery cell; 40, end cover; 41, electrode terminal; 50, shell; 60, electrode assembly; 70, battery management assembly; 80, housing; 801, first hole; 802, second hole; 80a, recess; 80b, protrusion; 80c, recess cavity; 81, bottom shell; 82, top cover; 90, circuit board; 91, second clamping part; 100, smoke sensor; 101, first air vent; 102, second air vent; 110, shell assembly; 1101, first clamping part; 111, first shell; 111a, pin opening; 1111, bottom wall; 1112, first wall body; 1113, second wall body; 1114, third wall body; 1115, fourth wall body; 1116, first support; 1117, second support; 112, second shell; 1121, limiting block; 1122, third support; 1123, fourth support; 120, clamping leg; 121, top flange; 130, clamping hole; 140, clamping surface; 150, light emitting element; 160, light receiving element; 170, connecting pin; 180, first light blocking element; 190, second light blocking element; 200, third clamping part; 210, fourth clamping part; 220, bar grating. DETAILED DESCRIPTION

[0059] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0060] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meanings understood by the skilled in the art to which the embodiments of the present application belong.

[0061] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0062] In addition, the technical terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0063] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0065] At present, from the development of market situation, the application of battery device is more and more widely. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0066] In the present application, the battery cell 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 can be in the shape of a flat body, a cuboid, or other shapes, etc. The embodiments of the present application are not limited thereto.

[0067] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery device mentioned in the present application can be a battery pack. For example, the battery device mentioned in the present application can include a battery module, etc. The battery device generally includes a box for packaging one or more battery cells. The box can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cell.

[0068] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work.

[0069] The positive electrode tab 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 includes a positive electrode current collecting portion and a positive electrode tab connected to the positive electrode current collecting portion. The positive electrode current collecting portion is coated with the positive electrode active material layer. The positive electrode tab is not coated with the positive electrode active material layer. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum. The positive electrode active material layer includes a positive electrode active material. The positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc.

[0070] The negative electrode tab 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 includes a negative electrode current collecting portion and a negative electrode tab connected to the negative electrode current collecting portion. The negative electrode current collecting portion is coated with the negative electrode active material layer. The negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material can be carbon or silicon, etc.

[0071] The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0072] During use of the battery device, there is a possibility that the battery cell in the box will experience thermal runaway. When the battery cell in the battery device experiences thermal runaway, the battery cell will generate smoke. At the same time, the battery cell experiencing thermal runaway will cause the pressure or temperature inside the box to rise. If the situation of the battery cell experiencing thermal runaway is not discovered in time and corresponding measures are not taken, the heat generated by the battery cell experiencing thermal runaway will cause the battery device to have a possibility of overall combustion or explosion, affecting the safety of the battery device.

[0073] In order to alleviate the problem that the thermal runaway of the battery cell cannot be found in time, a flue gas sensor can be arranged in the box. When the battery cell is in thermal runaway, the flue gas sensor can detect the flue gas generated by the battery cell, so that the thermal runaway can be found in time, and the battery device can be disposed accordingly, such as cooling by a fire extinguishing system, thereby improving the safety of the battery device.

[0074] Based on the above considerations, the inventors have designed a battery device after deep research. The battery management assembly is arranged in the box of the battery device. The battery management assembly includes a circuit board and a flue gas sensor. When the battery cell is in thermal runaway, the flue gas sensor can timely and accurately detect the flue gas released by the battery cell into the box and alarm, which is beneficial to improve the safety of the battery device. The flue gas sensor is integrated on the circuit board, which can multiplex the surface of the circuit board, improve the utilization rate of the circuit board, and improve the integration of the flue gas sensor and the circuit board, which is beneficial to reduce the assembly difficulty of the battery management assembly.

[0075] The technical solutions described in the embodiments of the present application are applicable to battery devices and electric devices using battery devices.

[0076] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not specially limit the above electric devices.

[0077] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above described battery devices and electric devices, but also applicable to all battery devices including a box and electric devices using battery devices, but for the sake of simplicity, the following embodiments are described taking an electric vehicle as an example.

[0078] Referring to Figure 1As shown, the vehicle 1 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, or a range extended vehicle, etc. The vehicle 1 is internally provided with a battery device 10. The battery device 10 can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1. For example, the battery device 10 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12. For example, the working power demand for starting, navigation, and driving of the vehicle 1.

[0079] In some embodiments of the present application, the battery device 10 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1 to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0080] In order to meet different power demand, the battery device 10 can include a plurality of battery cells. The battery cell refers to the smallest unit constituting a battery module or a battery pack. The plurality of battery cells can be connected in series and / or in parallel via electrode terminals to be applied to various application occasions. The battery device mentioned in the present application includes a battery module or a battery pack. Among them, the plurality of battery cells can be connected in series or in parallel or in a mixed manner. The mixed connection refers to a mixture of series connection and parallel connection. In the embodiments of the present application, the plurality of battery cells can directly constitute a battery pack, or first constitute a battery module 20, and then the battery module 20 constitutes a battery pack.

[0081] Referring to Figure 2 As shown, the battery device 10 includes a box body 10a and battery cells (not shown in the figure). The battery cells are accommodated in the box body 10a.

[0082] The box body 10a can be a simple solid structure such as a cuboid or a cylinder or a sphere, or a complex solid structure composed of a cuboid or a cylinder or a sphere, which is not limited in the embodiments of the present application. The material of the box body 10a can be an alloy material such as aluminum alloy or iron alloy, a high polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiments of the present application.

[0083] The housing 10a is used to accommodate individual battery cells, and the housing 10a can have various structures. In some embodiments, the housing 10a may include a first housing portion 10b and a second housing portion 10c. The first housing portion 10b and the second housing portion 10c overlap each other. The first housing portion 10b and the second housing portion 10c together define a receiving space for accommodating the individual battery cells. The second housing portion 10c may be a hollow structure with one open end. In some embodiments, the first housing portion 10b is a plate-like structure. The first housing portion 10b overlaps the open side of the second housing portion 10c to form a housing 10a with a receiving space. In some embodiments, both the first housing portion 10b and the second housing portion 10c may also be hollow structures with one open side. The open side of the first housing portion 10b overlaps the open side of the second housing portion 10c to form a housing 10a with a receiving space. Of course, the first housing portion 10b and the second housing portion 10c can have various shapes, such as cylinders, cuboids, etc.

[0084] To improve the sealing performance after the first housing part 10b and the second housing part 10c are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 10b and the second housing part 10c.

[0085] In some embodiments, the first housing portion 10b covers the top of the second housing portion 10c. The first housing portion 10b may also be referred to as the upper housing cover, and the second housing portion 10c may also be referred to as the lower housing.

[0086] In the battery device 10, there can be one or more battery cells. When there are multiple battery cells, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells are connected in both series and parallel. Multiple battery cells can be directly connected in series, parallel, or in a mixed configuration and then housed within the housing 10a. Alternatively, multiple battery cells can first be connected in series, parallel, or in a mixed configuration to form a battery module. Multiple battery modules can then be connected in series, parallel, or in a mixed configuration to form a whole and housed within the housing 10a.

[0087] In some embodiments, see Figure 3 As shown, there can be multiple battery cells 30. Multiple battery cells 30 are first connected in series, parallel, or in a mixed connection to form a battery module 20. Multiple battery modules 20 are then connected in series, parallel, or in a mixed connection to form a whole, which is housed in the casing 10a.

[0088] Multiple battery cells 30 in the battery module 20 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 30 in the battery module 20.

[0089] In the embodiments of the present application, the battery cell 30 can include a lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, etc., and the embodiments of the present application are not limited thereto. The battery cell 30 can be in the shape of a flat body, a cuboid, or other shapes, etc., and the embodiments of the present application are not limited thereto. However, for the sake of simplicity, the following embodiments will be described by taking a square cuboid battery cell 30 as an example.

[0090] Referring to Figure 4 As shown in the drawings, the battery cell 30 refers to the smallest unit that constitutes the battery device 10. The battery cell 30 includes an end cover 40, a shell 50, and an electrode assembly 60.

[0091] The end cover 40 refers to a component that covers the opening of the shell 50 to isolate the internal environment of the battery cell 30 from the external environment. For example, the shape of the end cover 40 can be adapted to the shape of the shell 50 to fit the shell 50. For example, the end cover 40 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 40 is not easy to deform when subjected to extrusion and impact, so that the battery cell 30 can have higher structural strength, and the safety performance can also be improved. The end cover 40 can be provided with functional components such as electrode terminals 41. The electrode terminals 41 can be used to electrically connect with the electrode assembly 60 for outputting or inputting the electrical energy of the battery cell 30.

[0092] In some embodiments, the end cover 40 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 30 when the internal pressure or temperature of the battery cell 30 reaches a threshold value. The material of the end cover 40 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application are not specially limited thereto. In some embodiments, an insulating component can also be provided on the inner side of the end cover 40, which can be used to isolate the electrical connection components in the shell 50 from the end cover 40 to reduce the risk of short circuit. For example, the insulating component can be plastic, rubber, etc.

[0093] The shell 50 is a component for cooperating with the end cover 40 to form an internal environment of the battery cell 30. The formed internal environment can be used to accommodate the electrode assembly 60, electrolyte (not shown in the figure), and other components. The shell 50 and the end cover 40 can be independent components. An opening can be provided on the shell 50, and the end cover 40 is made to cover the opening to form the internal environment of the battery cell 30 at the opening. Without limitation, the end cover 40 and the shell 50 can also be integrated. Specifically, the end cover 40 and the shell 50 can form a common connecting surface before other components enter the shell. When it is necessary to seal the inside of the shell 50, the end cover 40 is made to cover the shell 50. The shell 50 can be of various shapes and sizes, such as a cuboid, a hexagonal prism, etc. Specifically, the shape of the shell 50 can be determined according to the specific shape and size of the electrode assembly 60. The material of the shell 50 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0094] The electrode assembly 60 is a component where electrochemical reactions occur in the battery cell 30. One or more electrode assemblies 60 can be contained in the shell 50. The electrode assembly 60 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and an insulating member is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials, which constitute the main body of the electrode assembly. The portions of the positive electrode sheet and the negative electrode sheet without active materials each constitute a tab (not shown in the figure). The positive tab and the negative tab can be located together at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0095] Referring to Figures 5 to 8 The embodiments of the present application provide a battery device 10, which includes a box 10a, a battery cell 30, and a battery management assembly 70 (BMS).

[0096] The battery cell 30 is arranged in the box 10a. The battery management assembly 70 is arranged in the box 10a. The battery management assembly 70 includes a housing 80, a circuit board 90, and a smoke sensor 100. The circuit board 90 and the smoke sensor 100 are arranged in the housing 80. The smoke sensor 100 is electrically connected to the circuit board 90. The smoke sensor 100 includes a first air vent 101 and a second air vent 102. The first air vent 101 and the second air vent 102 are in communication with the space in the box 10a. One of the first air vent 101 and the second air vent 102 is an air inlet, and the other is an air outlet.

[0097] In this embodiment, the smoke sensor 100 is disposed within the housing 80. The smoke sensor 100 can reuse the space within the housing 80, improving the utilization rate of the internal space of the housing 80. The housing 80 can protect the smoke sensor 100. The circuit board 90 and the smoke sensor 100 are interconnected and integrated. Signal interaction can be achieved between the circuit board 90 and the smoke sensor 100. When thermal runaway occurs in the battery cell 30 within the housing 10a, the smoke generated by the battery cell 30 can enter the smoke sensor 100 through one of the first vent 101 and the second vent 102, and exit the smoke sensor 100 through the other. For example, the first vent 101 can be an inlet, and the second vent 102 can be an outlet. After the smoke enters the smoke sensor 100, the smoke sensor 100 can detect the smoke and interact with the circuit board 90. The smoke sensor 100 can promptly detect and alarm for thermal runaway, which is beneficial to improving the safety of the battery device 10.

[0098] In this embodiment, the smoke sensor 100 is integrated into the battery management assembly 70. When assembling the battery device 10, the battery management assembly 70, including the smoke sensor 100, can be installed and fixed as a whole, eliminating the need for separate installation and fixing of the smoke sensor 100. This reduces assembly complexity and improves the ease of assembly of the battery device 10. The smoke sensor 100 can reuse the surface and circuitry of the circuit board 90, improving the utilization rate of the circuit board 90. When a battery cell 30 experiences thermal runaway, the smoke sensor 100 in the battery management assembly 70 can promptly and accurately detect the smoke released from the battery cell 30 into the housing 10a and issue an alarm, thus improving the safety of the battery device 10.

[0099] See also some of the possible implementation methods. Figure 8 As shown, the flue gas sensor 100 includes a housing assembly 110. The circuit board 90 and the housing assembly 110 are detachably connected. The circuit board 90 and the flue gas sensor 100 are manufactured separately, and then the circuit board 90 and the flue gas sensor 100 can be assembled. After the circuit board 90 and the flue gas sensor 100 are assembled, the overall structure formed by the circuit board 90 and the flue gas sensor 100 is then assembled with the housing 80. When the flue gas sensor 100 needs inspection, maintenance, or replacement, it can be removed from the circuit board 90. The detachable connection between the circuit board 90 and the housing assembly 110 improves the ease of installation and removal of the flue gas sensor 100 from the circuit board 90.

[0100] In some examples, one of the circuit board 90 and the housing assembly 110 is provided with a locking part, and the other is provided with a locking part. The locking part and the locking part are locked or unlocked to connect or disconnect the flue gas sensor 100 and the circuit board 90.

[0101] When the circuit board 90 and the smoke sensor 100 are assembled, the locking part and the locking part lock together to fix the position of the smoke sensor 100. When the circuit board 90 and the smoke sensor 100 are separated, the locking part and the locking part unlock each other to release the restriction on the smoke sensor 100. The way in which the circuit board 90 and the housing assembly 110 are connected or separated by the locking part and the locking part allows the circuit board 90 and the housing assembly 110 to be connected without the need for additional connectors. This helps to reduce the number of parts used, reduce the complexity of the connection or separation operation between the circuit board 90 and the housing assembly 110, and improve the efficiency of the connection or separation operation between the circuit board 90 and the housing assembly 110.

[0102] See in some examples Figure 9 and Figure 10 As shown, the locking part includes a first latching part 1101. The locking part includes a second latching part 91. The first latching part 1101 and the second latching part 91 are locked or unlocked.

[0103] The locking part and the engaging part are connected or separated by a snap-fit ​​mechanism, which helps to ensure a stable connection between the locking part and the engaging part and makes it difficult for them to separate. At the same time, the connection method between the locking part and the engaging part is simple and easy to operate, which helps to improve the efficiency of the connection or separation operation between the locking part and the engaging part.

[0104] Exemplarily, the first latching portion 1101 may include a latching foot 120. The latching foot 120 includes a top flange 121. The second latching portion 91 includes a latching hole 130 and a latching surface 140 adjacent to the latching hole 130. During the assembly of the smoke sensor 100 and the circuit board 90, the smoke sensor 100 is placed on one side of the circuit board 90, and the latching foot 120 is aligned with the latching hole 130. When the smoke sensor 100 is moved, the top of the latching foot 120 inserts into and protrudes from the latching hole 130. The top flange 121 of the latching foot 120 overlaps with the latching surface 140, and the first latching portion 1101 and the second latching portion 91 are locked together. During the separation of the flue gas sensor 100 and the circuit board 90, a force is applied to the snap-fit ​​foot 120, causing the top flange 121 of the snap-fit ​​foot 120 to disengage from the snap-fit ​​surface 140. Then, the top of the snap-fit ​​foot 120 is pulled out from the snap-fit ​​hole 130, and the first snap-fit ​​part 1101 and the second snap-fit ​​part 91 are unlocked.

[0105] For example, the housing assembly 110 includes a locking portion. The circuit board 90 includes a locking portion.

[0106] See also some of the possible implementation methods. Figure 8 As shown, a recess 80a is provided on the outer surface of the outer casing 80. The first vent 101 is connected to the recess 80a.

[0107] The recess 80a has the ability to guide the flow of smoke. When thermal runaway occurs in the battery cell 30, the flow direction of the generated smoke in the space of the box 10a is not fixed. In the embodiment in which the first air vent 101 is an air inlet, the recess 80a can guide the smoke to flow more quickly and accurately to the first air vent 101 and enter the smoke sensor 100 from the first air vent 101, thereby ensuring that the smoke sensor 100 detects the smoke in the box 10a in time and accurately, which is conducive to improving the response rate of the smoke sensor 100. In the embodiment in which the first air vent 101 is an air outlet, the recess 80a can guide the smoke to be discharged more quickly into the space of the box 10a, reducing the possibility that the flow of smoke in the smoke sensor 100 is blocked and the detection result is inaccurate.

[0108] In some examples, referring to Figs. 8A and 8B, the housing 80 is provided with a first hole 801 and a second hole 802. The first air vent 101, the first hole 801, the recess 80a, and the space in the box 10a are in communication. The second air vent 102, the second hole 802, and the space in the box 10a are in communication. Figure 8 The first hole 801 is in communication with the recess 80a. After the overall structure composed of the circuit board 90 and the smoke sensor 100 is assembled with the housing 80, the first hole 801 and the first air vent 101 are in the same position and aligned with each other, while the second hole 802 and the second air vent 102 are in the same position and aligned with each other. The housing 80 does not block the first air vent 101 and the second air vent 102, ensuring that the smoke sensor 100 can smoothly circulate the smoke through the first air vent 101 and the second air vent 102.

[0109] Exemplarily, the recess 80a includes a bottom surface and four side surfaces. The side surfaces are connected to the bottom surface. The opening of the first hole 801 is provided on one of the side surfaces.

[0110] Exemplarily, the first hole 801 can be a circular through hole. The second hole 802 can be a circular through hole.

[0111] In some examples, referring to Figs. 8A and 8B, the housing 80 has a protrusion 80b. The protrusion 80b is located on one side of the recess 80a. The inner side of the protrusion 80b forms a recessed cavity 80c. At least part of the smoke sensor 100 is located in the recessed cavity 80c.

[0112] Figure 6 Figure 8 Exemplarily, the protrusion 80b is provided with a first protrusion 80b1 and a second protrusion 80b2. The first protrusion 80b1 is located on one side of the recess 80a. The second protrusion 80b2 is located on the other side of the recess 80a. The first protrusion 80b1 and the second protrusion 80b2 are connected to each other.

[0113] ​​The thickness of the shell 80 is relatively large at the position of the convex portion 80b, so as to facilitate the shell 80 to avoid the flue gas sensor 100, thereby providing installation space for the flue gas sensor 100. The thickness of the shell 80 is relatively large at the position of the convex portion 80b, and the thickness of the shell 80 is relatively small at the position outside the convex portion 80b, thereby facilitating the reduction of the overall volume of the shell 80, and facilitating the reduction of the space occupancy of the shell 80 in the cabinet 10a.

[0114] The flue gas sensor 100 is at least partially located in the concave cavity 80c, so that the shell 80 can limit and constrain the flue gas sensor 100, thereby reducing the possibility of the flue gas sensor 100 shaking or deviating in the shell 80.

[0115] Exemplarily, as shown in Figure 6 and Figure 8 , the flue gas sensor 100 is arranged on the edge-adjacent area of the circuit board 90. The shell 80 includes a bottom shell 81 and a top cover 82. The top cover 82 includes a top plate and a side plate. The side plate can be connected with the bottom shell 81. The top plate is provided with a concave portion 80a and a convex portion 80b. The convex portion 80b is arranged close to the edge of the top plate. The concave portion 80a is located on the side of the convex portion 80b away from the edge of the top plate.

[0116] In some examples, as shown in Figure 6 , Figure 7 and Figure 8 , the shell 80 includes a bottom shell 81 and a top cover 82. The bottom shell 81 and the top cover 82 are detachably connected. The circuit board 90 is arranged on the bottom shell 81. The top cover 82 is provided with a concave portion 80a, a first hole 801, a second hole 802, and a convex portion 80b.

[0117] During the assembly of the circuit board 90, the flue gas sensor 100, and the shell 80, the circuit board 90 and the bottom shell 81 can be connected and fixed after the assembly of the flue gas sensor 100 and the circuit board 90 is completed, and then the top cover 82 is buckled to the bottom shell 81 and connected and fixed with the bottom shell 81. The assembly process of the circuit board 90, the flue gas sensor 100, and the shell 80 is easy to operate, which facilitates the improvement of the assembly convenience.

[0118] Exemplarily, the bottom shell 81 and the top cover 82 are clamped with each other, which facilitates the improvement of the connection stability and the connection convenience between the bottom shell 81 and the top cover 82.

[0119] Exemplarily, the bottom shell 81 of the shell 80 is detachably connected with the cabinet 10a. For example, fasteners such as screws and bolts can be used to connect the bottom shell 81 and the cabinet 10a.

[0120] Exemplarily, the top cover 82 includes a top plate and a side plate. The side plate can be detachably connected with the bottom shell 81. For example, the side plate can be clamped with the bottom shell 81.

[0121] In some implementable manners, referring to Figure 11 and Figure 12 , the smoke sensor 100 comprises a light emitting member 150 and a light receiving member 160. The shell assembly 110 comprises a first shell 111 and a second shell 112. The first shell 111 is connected with the circuit board 90. The first shell 111 and the second shell 112 are connected to form a containing space. The emitting part of the light emitting member 150 and the receiving part of the light receiving member 160 are located in the containing space. The light emitting member 150 and the light receiving member 160 are both electrically connected with the circuit board 90. The first shell 111 is provided with the second air vent 102. The second shell 112 is provided with the first air vent 101.

[0122] The circuit board 90 can supply power for the light emitting member 150 and the light receiving member 160. In the case that the battery device 10 is working normally, the emitting part of the light emitting member 150 can continuously emit light to the internal space of the smoke sensor 100, but the receiving part of the light receiving member 160 cannot receive light. When the battery monomer 30 occurs thermal runaway and generates smoke, the smoke can enter the smoke sensor 100. Since the smoke has scattering effect on light, the receiving part can receive scattered light, so that the smoke sensor 100 can detect the existence of smoke in the box 10a. After the receiving part receives light, a photoelectric current can be generated to realize the conversion of optical signal to electrical signal. The receiving part transmits the electrical signal to the circuit board 90.

[0123] The smoke sensor 100 adopts the cooperation mode of the light emitting member 150 and the light receiving member 160, which is beneficial to improve the smoke detection accuracy and response rate, and reduce the possibility of misjudgment or untimely response.

[0124] In some examples, the light emitting member 150 can be an infrared light emitting member. The light receiving member 160 can be an infrared light receiving member. Illustratively, the light emitting member 150 can be an LED light emitting device. The light receiving member 160 can be an LED light emitting device.

[0125] In some examples, the first shell 111 is detachably connected with the circuit board 90. Illustratively, the first shell 111 of the shell assembly 110 is provided with a locking part. The circuit board 90 comprises a locking part.

[0126] In some examples, referring to Figure 11 , Figure 12 and Figure 13 , the first shell 111 comprises a pin opening 111a. The light emitting member 150 and the light receiving member 160 both comprise a connecting pin 170. The connecting pin 170 penetrates through the pin opening 111a and is electrically connected with the circuit board 90. The second shell 112 comprises a limiting block 1121. At least part of the limiting block 1121 is located in the pin opening 111a. The limiting block 1121 limits the connecting pin 170.

[0127] In the process of assembling the light emitting member 150 and the light receiving member 160 with the first shell 111 respectively, the connecting pin 170 of each of the light emitting member 150 and the light receiving member 160 can be aligned with and inserted into the corresponding pin opening 111a. The first shell 111 can limit the light emitting member 150 and the light receiving member 160 by the connecting pin 170, so that the mounting position of each of the light emitting member 150 and the light receiving member 160 is not easy to deviate during the assembly of the first shell 111 and the second shell 112, and the position accuracy of the light emitting member 150 and the light receiving member 160 meets the requirements. After the light emitting member 150 and the light receiving member 160 are assembled with the first shell 111 respectively, the connecting pin 170 of each of the light emitting member 150 and the light receiving member 160 can be led out from the corresponding pin opening 111a.

[0128] After the first shell 111 and the second shell 112 are assembled, the limiting block 1121 limits the connecting pin 170, so as to reduce the possibility of shaking or deviation of the connecting pin 170, and ensure that the position accuracy of the light emitting member 150 and the light receiving member 160 meets the requirements.

[0129] If the light emitting member 150 and the light receiving member 160 deviate from the predetermined position, the light propagation path between the light emitting member 150 and the light receiving member 160 will change, and there is a possibility that the light receiving member 160 cannot receive the light emitted by the light emitting member 150, which leads to the smoke sensor 100 misjudging or failing to detect the smoke in time. In the embodiment of the application, the first shell 111 and the second shell 112 limit the light emitting member 150 and the light receiving member 160 by the connecting pin 170, which is beneficial to solve the above technical problems.

[0130] Exemplarily, the connecting pin 170 is welded with the circuit board 90.

[0131] Exemplarily, the pin opening 111a is a groove. The pin opening 111a has an opening facing the second shell 112. The limiting block 1121 of the second shell 112 can be inserted into the pin opening 111a through the opening.

[0132] In some examples, referring to Figure 9 and Figure 14As shown, the first shell 111 includes a bottom wall 1111, a first wall body 1112 and a second wall body 1113. The bottom wall 1111 is provided with the second air vent 102. The first wall body 1112 and the second wall body 1113 are both connected to the bottom wall 1111. The first wall body 1112 and the second wall body 1113 are respectively located on two sides of the second air vent 102. The first wall body 1112 is close to the circuit board 90. The second wall body 1113 is away from the circuit board 90. The smoke sensor 100 includes a first light blocking piece 180. The first light blocking piece 180 is located in the first shell 111 and is arranged on the first wall body 1112.

[0133] In the case that the battery device 10 is working normally, the emitting part of the light emitting piece 150 can continuously emit light to the internal space of the smoke sensor 100. The first light blocking piece 180 can block the light emitted by the emitting part from directly entering the receiving part of the light receiving piece 160, thereby reducing the possibility of false alarm of the smoke sensor 100 caused by the light directly entering the receiving part.

[0134] Exemplarily, the optical axis of the light emitting piece 150 and the optical axis of the light receiving piece 160 intersect to form an intersection point, and the first light blocking piece 180 is located below the intersection point.

[0135] Exemplarily, the first light blocking piece 180 can include a cylindrical base and a baffle. The cylindrical base is connected to the first wall body 1112 of the first shell 111. The baffle is located on the side of the cylindrical base away from the first wall body 1112. Exemplarily, the cylindrical base can be a circular cylindrical base.

[0136] In some examples, referring to Figure 9 and Figure 14 As shown, the smoke sensor 100 includes a second light blocking piece 190. The second light blocking piece 190 is located in the first shell 111 and is arranged on the second wall body 1113.

[0137] In the case that the battery device 10 is working normally, the emitting part of the light emitting piece 150 can continuously emit light to the internal space of the smoke sensor 100. The second light blocking piece 190 can block the light emitted by the emitting part from directly entering the receiving part of the light receiving piece 160 after being reflected by the second wall body 1113, thereby reducing the possibility of false alarm of the smoke sensor 100 caused by the light directly entering the receiving part.

[0138] Exemplarily, the optical axis of the light emitting piece 150 and the optical axis of the light receiving piece 160 intersect to form an intersection point, and the second light blocking piece 190 is located above the intersection point.

[0139] Exemplarily, the second light blocking piece 190 can include a baffle.

[0140] Exemplarily, the first wall body 1112 is provided with a pin opening 111a. The first shell 111 includes a third wall body 1114 and a fourth wall body 1115. The third wall body 1114 and the fourth wall body 1115 are both connected to the bottom wall 1111. The third wall body 1114 connects the first wall body 1112 and the second wall body 1113. The fourth wall body 1115 connects the first wall body 1112 and the second wall body 1113. The third wall body 1114 and the fourth wall body 1115 are respectively located on two sides of the second air vent 102. The outer surfaces of the third wall body 1114 and the fourth wall body 1115 are respectively provided with locking portions.

[0141] In some examples, referring to Figs. 1 and 2, the first shell 111 includes a first support 1116 and a second support 1117. The second shell 112 includes a third support 1122 and a fourth support 1123. Before the first shell 111 and the second shell 112 are assembled, the light emitting member 150 is arranged on the first support 1116, and the light receiving member 160 is arranged on the second support 1117. After the first shell 111 and the second shell 112 are assembled, the first support 1116 and the third support 1122 jointly press the light emitting member 150 to fix the light emitting member 150, and the second support 1117 and the fourth support 1123 jointly press the light receiving member 160 to fix the light receiving member 160. Figure 9 Figure 14 In some examples, referring to Figs. 1 and 2, the first shell 111 includes a first support 1116 and a second support 1117. The second shell 112 includes a third support 1122 and a fourth support 1123. Before the first shell 111 and the second shell 112 are assembled, the light emitting member 150 is arranged on the first support 1116, and the light receiving member 160 is arranged on the second support 1117. After the first shell 111 and the second shell 112 are assembled, the first support 1116 and the third support 1122 jointly press the light emitting member 150 to fix the light emitting member 150, and the second support 1117 and the fourth support 1123 jointly press the light receiving member 160 to fix the light receiving member 160.

[0142] Exemplarily, the light emitting member 150 can be an LED light emitting device. The light receiving member 160 can be an LED light emitting device. The first support 1116, the second support 1117, the third support 1122 and the fourth support 1123 are respectively provided with a groove. After the first shell 111 and the second shell 112 are assembled, the groove of the first support 1116 and the groove of the third support 1122 jointly form a space for accommodating the light emitting member 150, and the groove of the second support 1117 and the groove of the fourth support 1123 jointly form a space for accommodating the light receiving member 160.

[0143] In some examples, referring to Figs. 1 and 2, the first shell 111 includes a first support 1116 and a second support 1117. The second shell 112 includes a third support 1122 and a fourth support 1123. Before the first shell 111 and the second shell 112 are assembled, the light emitting member 150 is arranged on the first support 1116, and the light receiving member 160 is arranged on the second support 1117. After the first shell 111 and the second shell 112 are assembled, the first support 1116 and the third support 1122 jointly press the light emitting member 150 to fix the light emitting member 150, and the second support 1117 and the fourth support 1123 jointly press the light receiving member 160 to fix the light receiving member 160. Figure 12

[0144] When the smoke sensor 100 is in the smoke entering state, the light emitted by the light emitting member 150 can enter the light receiving member 160 after scattering by the smoke, which is conducive to improving the detection sensitivity of the smoke sensor 100.

[0145] Exemplarily, the angle K between the optical axis of the light emitting member 150 and the optical axis of the light receiving member 160 is 110°.

[0146] In some examples, referring to Figs. 1 and 2, the first shell 111 includes a first support 1116 and a second support 1117. The second shell 112 includes a third support 1122 and a fourth support 1123. Before the first shell 111 and the second shell 112 are assembled, the light emitting member 150 is arranged on the first support 1116, and the light receiving member 160 is arranged on the second support 1117. After the first shell 111 and the second shell 112 are assembled, the first support 1116 and the third support 1122 jointly press the light emitting member 150 to fix the light emitting member 150, and the second support 1117 and the fourth support 1123 jointly press the light receiving member 160 to fix the light receiving member 160. Figure 15 ,​​Figure 16 and Figure 17 As shown, one of the first housing 111 and the second housing 112 is provided with a third latching part 200, and the other is provided with a fourth latching part 210. The third latching part 200 and the fourth latching part 210 are locked or unlocked to connect or separate the first housing 111 and the second housing 112.

[0147] The first shell 111 and the second shell 112 are connected or separated by a snap-fit ​​mechanism, which helps to ensure a stable connection between the first shell 111 and the second shell 112 and makes it difficult for them to separate. At the same time, the connection method between the first shell 111 and the second shell 112 is simple and easy to operate, improving the efficiency of the connection or separation operation between the first shell 111 and the second shell 112.

[0148] For example, the third snap-fit ​​portion 200 includes two snap-fit ​​holes 130, a snap-fit ​​surface 140 near the snap-fit ​​holes 130, and a snap-fit ​​protrusion. The fourth snap-fit ​​portion 210 includes two snap-fit ​​legs 120 and a buckle with a connection hole. The snap-fit ​​legs 120 include a top flange 121. After the first housing 111 and the second housing 112 are assembled, the snap-fit ​​legs 120 are inserted into and protrude from the corresponding snap-fit ​​holes 130, the top flanges 121 of the snap-fit ​​legs 120 overlap the snap-fit ​​surface 140, and the snap-fit ​​protrusion is inserted into the connection hole of the buckle, so that the third snap-fit ​​portion 200 and the fourth snap-fit ​​portion 210 are locked, and the first housing 111 and the second housing 112 are in a mutually connected state.

[0149] When the first shell 111 and the second shell 112 are separated, the snap-fit ​​foot 120 is pulled out from the snap-fit ​​hole 130, and the snap-fit ​​protrusion is disengaged from the buckle connection hole, thereby unlocking the third snap-fit ​​part 200 and the fourth snap-fit ​​part 210, and the first shell 111 and the second shell 112 are in a state of mutual separation.

[0150] For example, the first housing 111 is provided with a third latching portion 200. The second housing 112 is provided with a fourth latching portion 210.

[0151] See also some of the possible implementation methods. Figure 16 and Figure 17 As shown, at least one of the first vent 101 and the second vent 102 is a bar grid hole including a bar grid 220.

[0152] During the assembly of the circuit board 90, the flue gas sensor 100, and the housing 80, the grid holes can effectively block relatively large objects from entering the flue gas sensor 100, effectively reducing the possibility that objects entering the flue gas sensor 100 may affect the detection sensitivity and accuracy of the flue gas sensor 100.

[0153] In some examples, the number of the strip grids 220 is more than two. The distance between the adjacent strip grids 220 can be greater than or equal to 1 millimeter. Exemplarily, the distance between the adjacent strip grids 220 can be less than or equal to 3 millimeters.

[0154] In some examples, the first vent 101 and the second vent 102 are both strip grid holes.

[0155] According to some embodiments of the present application, the present application further provides a battery device 10 comprising the battery cell of any of the above solutions.

[0156] According to some embodiments of the present application, the present application further provides a battery device 10 comprising the battery cell of any of the above solutions.

[0157] The battery device 10 can be used in any of the above applications.

[0158] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, each technical feature 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 falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; The battery cell is housed within the casing. A battery management component is disposed within the housing. The battery management component includes a housing, a circuit board, and a smoke sensor. The circuit board and the smoke sensor are disposed within the housing. The smoke sensor is electrically connected to the circuit board. The smoke sensor includes a first vent and a second vent. The first vent and the second vent are connected to the space within the housing. One of the first vent and the second vent is an air inlet, and the other is an air outlet.

2. The battery device according to claim 1, characterized in that, The flue gas sensor includes a housing assembly, and the circuit board and the housing assembly are detachably connected.

3. The battery device according to claim 2, characterized in that, One of the circuit board and the housing assembly is provided with a locking part, and the other is provided with a locking part. The locking part and the locking part are locked or unlocked to connect or separate the flue gas sensor and the circuit board.

4. The battery device according to claim 3, characterized in that, The locking part includes a first latching part, and the locking part includes a second latching part, wherein the first latching part and the second latching part lock or unlock.

5. The battery device according to any one of claims 1 to 4, characterized in that, The outer surface of the housing is provided with a recess, and the first vent is connected to the recess.

6. The battery device according to claim 5, characterized in that, The outer shell is provided with a first hole and a second hole. The first vent, the first hole, the recess and the space inside the box are connected. The second vent, the second hole and the space inside the box are also connected.

7. The battery device according to claim 6, characterized in that, The housing has a protrusion located on one side of the recess, and a cavity is formed on the inner side of the protrusion, with at least a portion of the flue gas sensor located within the cavity.

8. The battery device according to claim 7, characterized in that, The housing includes a bottom shell and a top cover. The circuit board is disposed on the bottom shell. The bottom shell and the top cover are detachably connected. The top cover is provided with the recess, the first hole, the second hole, and the protrusion.

9. The battery device according to any one of claims 2 to 4, characterized in that, The flue gas sensor includes a light emitter and a light receiver. The housing assembly includes a first housing and a second housing. The first housing is connected to the circuit board. The first housing and the second housing are connected to form an accommodating space. The emitting part of the light emitter and the receiving part of the light receiver are located in the accommodating space. The light emitter and the light receiver are both electrically connected to the circuit board. The first housing is provided with a second vent, and the second housing is provided with a first vent.

10. The battery device according to claim 9, characterized in that, The first housing includes a pin opening, and both the light emitting element and the light receiving element include connection pins. The connection pins extend through the pin opening and are electrically connected to the circuit board. The second housing includes a limiting block, at least a portion of which is located within the pin opening, and the limiting block limits the connection pins.

11. The battery device according to claim 9, characterized in that, The first housing includes a bottom wall, a first wall body, and a second wall body. The bottom wall body is provided with the second vent. The first wall body and the second wall body are both connected to the bottom wall body. The first wall body and the second wall body are respectively located on both sides of the second vent. The first wall body is close to the circuit board. The smoke sensor includes a first light-blocking element. The first light-blocking element is located inside the first housing body and is disposed on the first wall body.

12. The battery device according to claim 9, characterized in that, The first housing includes a bottom wall, a first wall body, and a second wall body. The bottom wall body is provided with the second vent. The first wall body and the second wall body are both connected to the bottom wall body. The first wall body and the second wall body are respectively located on both sides of the second vent. The second wall body is away from the circuit board. The smoke sensor includes a second light-blocking element. The second light-blocking element is located inside the first housing body and is disposed on the second wall body.

13. The battery device according to claim 9, characterized in that, The angle between the optical axis of the light emitter and the optical axis of the light receiver ranges from 100° to 120°.

14. The battery device according to claim 9, characterized in that, One of the first shell and the second shell is provided with a third latching part, and the other is provided with a fourth latching part. The third latching part and the fourth latching part are locked or unlocked to connect or separate the first shell and the second shell.

15. The battery device according to any one of claims 1 to 4, characterized in that, At least one of the first vent and the second vent is a bar grid hole including a bar grid.

16. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 15, the battery device being used to provide electrical energy.

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