Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a bottom wall, a side wall connected to the bottom wall, and a containing space defined by the bottom wall and the side wall, the side wall comprises a first inner plate and a first outer plate which are arranged at an interval in the direction away from the containing space, and a first opening is formed in the side, facing the containing space, of the bottom wall; the single battery is arranged in the accommodating space, and the single battery comprises a pressure relief mechanism which is arranged corresponding to the first opening; the exhaust channel comprises a first channel located between the first inner plate and the first outer plate, and the first channel communicates with the first opening; the side wall further comprises a reinforcing plate, the reinforcing plate is connected between the first inner plate and the first outer plate so that the interior of the first channel can be divided into two or more sub-channels, the reinforcing plate is provided with a first communicating opening formed in a penetrating mode, and every two adjacent sub-channels communicate with each other through the corresponding first communicating opening.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device and an electrical device. Background Technology

[0002] Battery devices are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] However, as the demand for energy density and weight reduction in battery devices increases, the spatial layout becomes more compact, and the exhaust system occupies a lot of space, resulting in insufficient internal space for battery devices and consequently, lower energy density. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can improve the energy density of the battery device.

[0005] In a first aspect, this application provides a battery device, comprising: a housing, including a bottom wall, a side wall connected to the bottom wall, and a receiving space formed by the bottom wall and the side wall, the side wall including a first inner plate and a first outer plate spaced apart in a direction away from the receiving space, and a first opening on the side of the bottom wall facing the receiving space; a battery cell, the battery cell being disposed in the receiving space, and the battery cell including a pressure relief mechanism, the pressure relief mechanism being disposed corresponding to the first opening; an exhaust channel, the exhaust channel including a first channel located between the first inner plate and the first outer plate, the first channel communicating with the first opening; wherein, the side wall further includes a reinforcing plate, the reinforcing plate being connected between the first inner plate and the first outer plate to divide the first channel into two or more sub-channels, the reinforcing plate having a through first connecting opening, and two adjacent sub-channels communicating with each other through the first connecting opening.

[0006] In this embodiment, the battery device includes a housing, individual battery cells, and an exhaust channel. The individual battery cells are located within the housing's accommodating space. The housing includes a bottom wall and side walls. The side walls include a first inner plate and a first outer plate. A first channel of the exhaust channel is located between the first inner plate and the first outer plate, reducing the volume of the exhaust channel within the accommodating space and thus reducing the space occupied by the exhaust channel within the housing, thereby increasing the energy density of the battery device. A first opening is provided on the bottom wall, and the first channel communicates with the first opening. A pressure relief mechanism is correspondingly provided with the first opening, allowing the gas discharged by the pressure relief mechanism to be quickly discharged from the first opening to the first channel. A reinforcing plate is also provided inside the side wall to strengthen its structural strength. A first connecting opening on the reinforcing plate allows multiple sub-channels to communicate with each other, facilitating gas flow between the multiple sub-channels and improving exhaust efficiency.

[0007] In some embodiments, the first inner plate and the first outer plate are arranged side by side along the first direction, the first connecting opening penetrates the reinforcing plate along the second direction, the first connecting opening is located at the end of the sidewall in the third direction, and the first connecting opening penetrates the edge of the reinforcing plate, and the first direction, the second direction and the third direction intersect each other.

[0008] In these embodiments, the first connecting opening is disposed at the end of the sidewall. During the preparation of the sidewall, the reinforcing plate can be processed through the opening at the end to form the first connecting opening, which facilitates the preparation and forming of the first connecting opening without damaging the external morphology of the sidewall.

[0009] In some embodiments, a bottom plate is provided on the side of the sidewall facing the bottom wall. The bottom plate is connected between the first outer plate and the first inner plate. A sealing element is provided on the side of the bottom plate away from the first inner plate and the first outer plate. The bottom plate is provided with a second connecting opening. The second connecting opening and the sealing element are misaligned, and the second connecting opening and the first connecting opening are arranged side by side and corresponding to each other.

[0010] In these embodiments, the reinforcing plate can also be processed to form the first connecting opening through the second connecting opening on the base plate. The misalignment of the second connecting opening and the seal can reduce damage to the seal during the processing of the sidewall to form the first and second connecting openings.

[0011] In some embodiments, the bottom wall includes a second inner plate and a second outer plate spaced apart in a direction away from the receiving space, and the exhaust passage includes a second channel located between the second inner plate and the second outer plate, the first opening and the second channel are connected, and the second channel is connected to the first channel.

[0012] In these alternative embodiments, a second channel is provided in the bottom wall, allowing gas to flow through the second channel to the first channel and then out of the box.

[0013] In some embodiments, the second inner plate is provided with a first opening; and / or, the first outer plate is provided with a second opening communicating with the first channel.

[0014] In these alternative embodiments, the second inner plate is provided with a first opening, allowing gas to enter the second channel from the first opening. The first outer plate is provided with a second opening, allowing gas to exit the first channel from the second opening.

[0015] In some embodiments, the second inner plate is provided with a first opening communicating with the second channel, and there are multiple battery cells and multiple first openings, with each first opening corresponding to a pressure relief mechanism of each battery cell.

[0016] In these embodiments, there are multiple first openings, and each first opening corresponds to each battery cell, so that the gas discharged from each battery cell can be discharged from the first opening more quickly.

[0017] In some embodiments, the first inner plate is provided with a third opening communicating with the first channel, and the third opening is provided with a sealing component, which is bonded or welded to the first inner plate.

[0018] In these embodiments, the sealing component is located at the third opening, which can improve the problem of gas flowing back into the chamber through the third opening.

[0019] In some embodiments, the first inner plate has a connecting hole, and the first channel and the second channel are connected to each other through the connecting hole.

[0020] In these embodiments, gas can flow between the first and second channels through a connecting hole.

[0021] In some embodiments, the second inner plate includes a body portion and a protrusion portion, the protrusion portion being connected to the side of the body portion facing the sidewall, and the protrusion portion being disposed protruding relative to the body portion toward the receiving space; the second channel includes a first sub-chamber and a second sub-chamber that are interconnected, the first sub-chamber being formed by the protrusion portion and the two outer plates, the second sub-chamber being formed by the body portion and the second outer plates, and the connecting hole being interconnected with the first sub-chamber.

[0022] In these embodiments, a protrusion is provided on the second inner plate, and the second channel includes a first sub-chamber formed by the protrusion and the second outer plate, and a second sub-chamber formed by the body and the second outer plate. The width of the first sub-chamber in the height direction of the battery device is larger than that of the second sub-chamber, which facilitates the appropriate increase of the size of the connecting hole, so that the gas can flow better between the first channel and the second channel.

[0023] In some embodiments, among two or more sub-channels, the sub-channel located on the side of the sidewall facing the bottom wall is connected to the second channel.

[0024] In these embodiments, among the multiple sub-channels, the sub-channel near the bottom wall and the second channel are connected, and the connecting hole is used to connect the sub-channel near the bottom wall and the second channel.

[0025] In some embodiments, the first outer plate is provided with a second opening communicating with the first channel, and the second opening is interconnected with two or more sub-channels.

[0026] In these embodiments, the second opening is simultaneously connected to multiple sub-channels, allowing gas from multiple sub-channels to be directly discharged through the second opening, thereby increasing the gas flow rate.

[0027] Secondly, embodiments of this application provide an electrical device, including the battery device described in the second aspect embodiment above. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the battery pack structure provided in one embodiment of the application;

[0032] Figure 4 This is a schematic diagram of the structure of a battery device housing provided in one embodiment of this application;

[0033] Figure 5 yes Figure 4 A partially enlarged structural diagram;

[0034] Figure 6 This is a top view of the battery device housing provided in one embodiment of this application;

[0035] Figure 7 yes Figure 6 Sectional view at point AA;

[0036] Figure 8 yes Figure 7 A magnified schematic diagram of the local structure at point I;

[0037] Figure 9 yes Figure 7 A magnified view of the structure at point I in another example;

[0038] Figure 10 This is a schematic diagram of the battery device housing provided in one embodiment of this application from another perspective;

[0039] Figure 11 yes Figure 10 A magnified schematic diagram of the local structure at point II;

[0040] Figure 12 This is a partially enlarged structural diagram of the box in another example;

[0041] Figure 13 yes Figure 12 A partial sectional view.

[0042] 10. Vehicle; 110. Motor; 120. Controller; 20. Battery unit; 201. Battery pack; 2021. First housing; 2022. Second housing;

[0043] 1. Housing; 103. First opening; 104. Second opening; 105. Third opening; 11. Bottom wall; 111. Second inner panel; 111a. Main body; 111a1. First segment; 111a2. Second segment; 111b. Protrusion; 112. Second outer panel; 12. Side wall; 121. First inner panel; 121a. Connecting hole; 122. First outer panel; 123. Reinforcing plate; 123a. First connecting opening; 124. Bottom plate; 124a. Second connecting opening; 125. Sealing element;

[0044] 2. Battery cells;

[0045] 3. Exhaust passage; 31. First passage; 311. Sub-passage; 32. Second passage; 321. First sub-chamber; 322. Second sub-chamber;

[0046] 5. Second sealing component; 51. Sealing plate; 52. Extension; 53. First sealing component;

[0047] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0049] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0050] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0055] During the use of a battery device, when a single battery cell experiences thermal runaway and releases gas, the gas needs to be discharged from the battery device in a timely manner. This requires the installation of an exhaust device inside the battery device. However, the installation of an exhaust device can lead to a shortage of internal space in the battery device, which can affect the energy density of the battery device.

[0056] The reason for the above problem is that the exhaust device is usually installed in the battery pack along with the battery cells. The exhaust device occupies space in the pack, affecting the space available for the battery cells and thus the energy density of the battery pack.

[0057] To address the aforementioned issues, this application provides a battery device comprising a housing, individual battery cells, and an exhaust channel. The housing includes a bottom wall and side walls, which enclose a receiving space. The side walls include a first inner plate and a first outer plate spaced apart in a direction away from the receiving space. At least a portion of the exhaust channel is located between the first inner plate and the first outer plate, thereby reducing the volume of the exhaust channel within the receiving space and consequently reducing the space occupied by the exhaust channel within the housing, thus improving the energy density of the battery device.

[0058] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0059] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0060] In this embodiment of the application, the battery cell can be a secondary battery, which refers to the battery cell 2 that can be used again after being discharged by recharging to activate the active material.

[0061] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell 2 can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0062] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0063] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0064] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including the housing 1 and electrical devices using the battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicle 10 as an example.

[0065] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 10 provided in some embodiments of this application. The vehicle 10 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 20 is provided inside the vehicle 10, and the battery device 20 can be located at the bottom, front, or rear of the vehicle 10. The battery device 20 can be used to power the vehicle 10; for example, the battery device 20 can serve as the operating power source for the vehicle 10. The vehicle 10 may also include a controller 120 and a motor 110. The controller 120 is used to control the battery to supply power to the motor 110, for example, to meet the power needs of the vehicle 10 during starting, navigation, and driving.

[0066] In some embodiments of this application, the battery device 20 can not only serve as the operating power source for the vehicle 10, but also as the driving power source for the vehicle 10, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10.

[0067] Figure 2 A schematic diagram of the structure of a battery device 20 according to an embodiment of this application is shown. Figure 3 A schematic diagram of the structure of a battery pack 201 according to an embodiment of this application is shown.

[0068] like Figure 2 and Figure 3 As shown, in some embodiments, the battery device 20 includes a housing 1 and a battery pack 201. The housing 1 includes an upper housing and a lower housing. The battery pack 201 is located inside the housing 1 and includes a plurality of battery cells 2.

[0069] In some embodiments, the battery device 20 may be a battery pack, which includes a housing 1 and one or more battery cells 2, with the battery cells 2 housed in the housing 1.

[0070] As an example, multiple battery cells 2 can be directly fixed to the housing 1 and housed in the housing 1.

[0071] As an example, the housing 1 may include a first housing 2021 and a second housing 2022. The first housing 2021 and the second housing 2022 are fastened together to form a closed space inside the housing 1 to house the battery pack 201. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 2021 may be a top cover or a bottom wall 11.

[0072] Optionally, multiple individual battery cells 2 can be directly installed inside the housing 1 without forming a battery pack 201.

[0073] Please refer to the following: Figures 4 to 7 The battery device 20 mentioned in the embodiments of this application may include a housing 1, a battery cell 2, and an exhaust channel 3. The housing 1 includes a bottom wall 11, a side wall 12 connected to the bottom wall 11, and an accommodating space formed by the bottom wall 11 and the side wall 12. The side wall 12 includes a first inner plate 121 and a first outer plate 122 spaced apart in a direction away from the accommodating space. The bottom wall 11 has a first opening 103 on the side facing the accommodating space. A battery cell 2 is disposed in the accommodating space and includes a pressure relief mechanism, which is disposed corresponding to the first opening 103. An exhaust channel 3 includes a first channel 31 located between the first inner plate 121 and the first outer plate 122, and the first channel 31 communicates with the first opening 103. The side wall 12 also includes a reinforcing plate 123 connected between the first inner plate 121 and the first outer plate 122 to divide the first channel 31 into two or more sub-channels 311. The reinforcing plate 123 has a through-hole first connecting opening 123a, and two adjacent sub-channels 311 communicate with each other through the first connecting opening 123a.

[0074] In this embodiment, the battery device 20 includes a housing 1, a battery cell 2, and an exhaust channel 3. The battery cell 2 is located within the housing 1. The housing 1 includes a bottom wall 11 and a side wall 12. The side wall 12 includes a first inner plate 121 and a first outer plate 122. The first channel 31 of the exhaust channel 3 is located between the first inner plate 121 and the first outer plate 122, which reduces the volume of the exhaust channel 3 within the housing 1, thereby reducing the space occupied by the exhaust channel 3 within the housing 1 and improving the energy density of the battery device 20. A first opening 103 is provided on the bottom wall 11, and the first channel 31 is connected to the first opening 103. A pressure relief mechanism is correspondingly provided with the first opening 103, so that the gas discharged by the pressure relief mechanism can be discharged from the first opening 103 to the first channel 31 as quickly as possible. A reinforcing plate 123 is also provided inside the side wall 12 to enhance the structural strength of the side wall 12. The first connecting opening 123a provided on the reinforcing plate 123 allows multiple sub-channels 311 to be interconnected, facilitating the flow of gas between the multiple sub-channels 311 and improving exhaust efficiency.

[0075] As an example, the housing 1 may include a top cover, a frame, and a bottom wall 11. The top cover and the bottom wall 11 are respectively connected to the frame, so that the interior of the housing 1 forms a closed space to accommodate the battery pack 201.

[0076] In some embodiments, the housing 1 may be part of the chassis structure of the vehicle 10. For example, a portion of the housing 1 may be at least a portion of the floor of the vehicle 10, or a portion of the housing 1 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 10.

[0077] Optionally, the first inner plate 121 and the first outer plate 122 are spaced apart, so that a gap is formed between the first inner plate 121 and the first outer plate 122, and this gap is reused as the first channel 31 of the exhaust channel 3.

[0078] There are various ways to arrange the housing 1. For example, the housing 1 may include a side wall 12 and a bottom wall 11. The side wall 12 may be part of the frame mentioned above, and the top cover and bottom wall 11 are both connected to the side wall 12. The side wall 12 is located between the top cover and the bottom wall 11.

[0079] Optionally, the number of reinforcing plates 123 can be one or more. When the number of reinforcing plates 123 is two or more, the two or more reinforcing plates 123 can be spaced apart between the first inner plate 121 and the first outer plate 122. For example, the two or more reinforcing plates 123 can be spaced apart along the second direction Y. Optionally, the extension length of the reinforcing plate 123 in the third direction Z is equal to the extension length of the second inner plate 111 and the second outer plate 112 in the third direction Z.

[0080] Optionally, the reinforcing plate 123, the first inner plate 121, and the first outer plate 122 can be integrally formed to improve the structural strength of the sidewall 12.

[0081] In some embodiments, such as Figures 5 to 8 As shown, the first inner plate 121 and the first outer plate 122 are arranged side by side along the first direction X. The first connecting opening 123a penetrates the reinforcing plate 123 along the second direction Y. The first connecting opening 123a is located at the end of the side wall 12 in the third direction Z, and the first connecting opening 123a penetrates the edge of the reinforcing plate 123, that is, the first connecting opening 123a extends to the edge of the reinforcing plate 123. The first direction X, the second direction Y and the third direction Z intersect each other.

[0082] In these embodiments, the first connecting opening 123a is disposed at the end of the side wall 12. During the preparation of the side wall 12, the reinforcing plate 123 can be processed through the opening at the end to form the first connecting opening 123a, which facilitates the preparation and forming of the first connecting opening 123a without damaging the external morphology of the side wall 12.

[0083] Optionally, one or more sidewalls 12 may be provided at one end of the battery device 20, with the two or more sidewalls 12 spaced apart along a third direction Z. A first connecting opening 123a is provided at the end of the sidewall 12 in the third direction Z. Optionally, the two sidewalls 12 are spaced apart along the third direction Z to form a clearance gap between the two sidewalls 12 for accommodating components such as a high-voltage box.

[0084] In some embodiments, such as Figure 9 As shown, a bottom plate 124 is also provided on the side of the sidewall 12 facing the bottom wall 11. The bottom plate 124 is connected between the first outer plate 122 and the first inner plate 121. A sealing element 125 is provided on the side of the bottom plate 124 away from the first inner plate 121 and the first outer plate 122. The bottom plate 124 is provided with a second connecting opening 124a. The second connecting opening 124a and the sealing element 125 are misaligned, and the second connecting opening 124a and the first connecting opening 123a are arranged side by side and correspondingly.

[0085] In these embodiments, the reinforcing plate 123 can also be processed to form the first connecting opening 123a through the second connecting opening 124a on the base plate 124. The second connecting opening 124a and the seal 125 are misaligned, which can reduce the damage to the seal 125 during the processing of the side wall 12 to form the first connecting opening 123a and the second connecting opening 124a.

[0086] Optional, such as Figure 8 and Figure 9As shown, the base plate 124, the first outer plate 122, the first inner plate 121, and the reinforcing plate 123 can be integrally formed. Optionally, the size and shape of the base plate 124 and the reinforcing plate 123 can be the same, except that the reinforcing plate 123 is located inside the first inner plate 121 and the first outer plate 122, and the base plate 124 is located at the ends of the first inner plate 121 and the first outer plate 122 facing the bottom wall 11.

[0087] A sealing element 125 is provided on the outside of the base plate 124. The base plate 124 and the sealing element 125 can be connected to the bottom wall 11 via a connector. By providing the sealing element 125, the sealing performance of the connection between the side wall 12 and the bottom wall 11 can be improved. Optionally, the base plate 124, the bottom wall 11, and the sealing element 125 can be provided with interconnected connecting holes, and connecting bolts can pass through the connecting holes on the base plate 124, the bottom wall 11, and the sealing element 125 to connect the base plate 124, the bottom wall 11, and the sealing element 125.

[0088] Optional, such as Figure 8 As shown, when the first connecting opening 123a is located at one end of the reinforcing plate 123 in the third direction Z, the second connecting opening 124a may not be provided on the base plate 124. The first connecting opening 123a can be formed by cutting or other processing of the reinforcing plate 123 through one end of the side wall 12. Alternatively, as Figure 9 As shown, when the first connecting opening 123a is located on the reinforcing plate 123 and is not connected to the edge of the reinforcing plate 123, the bottom plate 124 and the reinforcing plate 123 can be simultaneously drilled from the side of the bottom plate 124 facing the bottom wall 11 to form the second connecting opening 124a and the first connecting opening 123a. At this time, the second connecting opening 124a and the seal 125 are misaligned to improve the damage to the seal 125 during the processing.

[0089] Optionally, the second connecting opening 124a is located on the side of the seal 125 facing the receiving space to ensure the sealing effect of the seal 125.

[0090] In some embodiments, such as Figures 7 to 9 As shown, the bottom wall 11 includes a second inner plate 111 and a second outer plate 112 spaced apart in a direction away from the accommodating space. The exhaust channel 3 also includes a second channel 32 located between the second inner plate 111 and the second outer plate 112. The first opening 103 and the second channel 21 are connected, and the second channel 32 is connected to the first channel 31.

[0091] In these alternative embodiments, a second channel 32 is provided in the bottom wall 11, allowing gas to flow through the second channel 32 to the first channel 31 and be discharged outside the housing 1.

[0092] When one of the multiple sub-channels 311 is connected to the second channel 32, due to the presence of the first connecting opening 123a, the multiple sub-channels 311 are interconnected, and gas can flow from one of the sub-channels 311 to the other sub-channels 311.

[0093] Optionally, the base plate 124, the second outer plate 112, and the seal 125 may be provided with interconnected connecting holes, and connecting bolts may be passed through the connecting holes on the base plate 124, the second outer plate 112, and the seal 125 to connect the base plate 124, the second outer plate 112, and the seal 125.

[0094] Optionally, the battery device 20 has a first direction X, a second direction Y, and a third direction Z that intersect each other. For example, the first direction X can be the thickness direction of the sidewall 12, and the first inner plate 121 and the first outer plate 122 can be spaced apart along the first direction X. The second direction Y can be the height direction of the battery device 20, and the sidewall 12 can be connected to one side of the bottom wall 11 in the second direction Y. The second direction Y is also the thickness direction of the bottom wall 11, and the second inner plate 111 and the second outer plate 112 are spaced apart along the second direction Y. The third direction Z can be the length direction of the sidewall 12, and the sidewall 12 extends along the third direction Z.

[0095] The first inner plate 121 and the second inner plate 111 can be separately disposed from each other, or a part of the first inner plate 121 and the second inner plate 111 can be integrally disposed. The first outer plate 122 and the second outer plate 112 can be separately disposed from each other, or a part of the first outer plate 122 and the second outer plate 112 can be integrally formed.

[0096] In some embodiments, such as Figures 4 to 11 As shown, the second inner plate 111 is provided with a first opening 103 communicating with the second channel 32; and / or, the first outer plate 122 is provided with a second opening 104 communicating with the first channel 31. That is, the first opening 103 is provided on the second inner plate 111.

[0097] In these alternative embodiments, the second inner plate 111 is provided with a first opening 103, allowing gas to enter the second channel 32 through the first opening 103. The first outer plate 122 is provided with a second opening 104, allowing gas to exit the first channel through the second opening 104.

[0098] The first opening 103 is located on the second inner plate 111 of the bottom wall 11, and the second opening 104 is located on the first outer plate 122 of the side wall 12. That is, the first opening 103 is located on the bottom wall 11 and the second opening 104 is located on the side wall 12, so that the gas discharged from the bottom of the battery cell 2 can enter the exhaust channel 3 through the closer first opening 103 and be discharged through the second opening 104 of the side wall 12, which can improve the exhaust effect.

[0099] In some embodiments, such as Figures 4 to 6 As shown, the second inner plate 111 is provided with a first opening 103 communicating with the second channel 32. There are multiple battery cells 2 and multiple first openings 103. Each first opening 103 is provided with a pressure relief mechanism corresponding to each battery cell 2.

[0100] In these embodiments, there are multiple first openings 103, and each first opening 103 is correspondingly set with each battery cell 2, so that the gas discharged from each battery cell 2 can be discharged from the first opening 103 more quickly.

[0101] Optionally, multiple battery cells 2 are arranged along a third direction Z to form a battery pack 201, and the multiple battery packs 201 are arranged side by side along a first direction X. Correspondingly, multiple first openings 103 are arranged along a third direction Z to form an opening column, and each opening in the opening column corresponds one-to-one with each battery cell 2 in the battery pack 201. The multiple opening columns are arranged side by side along the first direction X.

[0102] There are various ways to set the shape of the first opening 103. The shape of the first opening 103 can be at least one of a circle, an ellipse, a polygon, or a combination thereof. For example, the shape of the first opening 103 is waist-shaped, and the length of the first opening 103 in the first direction X is greater than its length in the third direction Z. The battery cell 2 covers the first opening 103, and the shape of the first opening 103 is more compatible with the shape of the battery cell 2.

[0103] In some embodiments, such as Figure 12 and Figure 13 As shown, the first inner plate 121 is provided with a third opening 105 that communicates with the first channel. The third opening 105 is provided with a first sealing component 53, which is bonded or welded to the first inner plate 121.

[0104] In these embodiments, the first sealing component 53 is disposed at the third opening 105, which can improve the problem of gas flowing back into the housing 1 through the third opening 105.

[0105] In some embodiments, such as Figures 7 to 9 As shown, the first inner plate 121 has a connecting hole 121a, and the first channel 31 and the second channel 32 are connected to each other through the connecting hole 121a.

[0106] In these embodiments, gas can flow through the connecting hole 121a between the first channel 31 and the second channel 32.

[0107] Optionally, the connecting hole 121a on the first inner plate 121 can be positioned in various ways, as long as the connecting hole 121a can connect the first channel 31 and the second channel 32.

[0108] In some embodiments, such as Figures 7 to 9 As shown, among the two or more sub-channels 311, the sub-channel 311 located on the side of the sidewall 12 facing the bottom wall 11 is connected to the second channel 32.

[0109] In these embodiments, among the multiple sub-channels 311, the sub-channel 311 near the bottom wall 11 is connected to the second channel 32, and the connecting hole 121a is used to connect the sub-channel 311 near the bottom wall 11 and the first channel 31.

[0110] Optional, such as Figures 7 to 9 As shown, when the first inner plate 121 is provided with a connecting hole 121a, the connecting hole 121a of the first inner plate 121 and the second connecting opening 124a of the bottom plate 124 can be provided alternately, or the connecting hole 121a and the second connecting opening 124a can be connected to each other to simplify the structure of the side wall 12.

[0111] In some embodiments, such as Figures 7 to 9 As shown, the second inner plate 111 includes a body portion 111a and a protrusion 111b. The protrusion 111b is connected to the side of the body portion 111a facing the side wall 12, and the protrusion 111b protrudes towards the accommodating space relative to the body portion 111a. The second channel 32 includes a first sub-chamber 321 and a second sub-chamber 322 that are interconnected. The first sub-chamber 321 is formed by the protrusion 111b and the second outer plate 112, and the second sub-chamber 322 is formed by the body portion 111a and the second outer plate 112. The connecting hole 121a and the first sub-chamber 321 are interconnected.

[0112] In these embodiments, a protrusion 111b is provided on the second inner plate 111, and the second channel 32 includes a first sub-chamber 321 formed by the protrusion 111b and the second outer plate 112, and a second sub-chamber 322 formed by the body portion 111a and the second outer plate 112. The width of the first sub-chamber 321 in the height direction of the battery device 20 is larger than that of the second sub-chamber 322, which facilitates the appropriate increase of the size of the connecting hole 121a, so that the gas can flow better between the first channel 31 and the second channel 32.

[0113] Optionally, the extension length of the protrusion 111b in the third direction Z and the extension length of the sidewall 12 in the third direction Z can be the same, and the protrusion 111b can be used to strengthen the structural strength of the bottom wall 11 and / or the sidewall 12.

[0114] Optionally, the protrusion 111b and the first inner plate 121 can be integrally formed to improve the structural strength of the sidewall 12. Optionally, the body portion 111a includes a first segment 111a1 and a second segment 111a2. The first segment 111a1 can be connected to the protrusion 111b, and the second segment 111a2 and the second segment 111a2 can be separately arranged. That is, a part of the body portion 111a, the protrusion 111b and the first inner plate 121 can be integrally formed, while the other part of the body portion 111a and the first inner plate 121 are separately arranged.

[0115] Optionally, the second segment 111a2 can be used to carry the battery cell 2, and the first opening 103 can be opened in the second segment 111a2 so that the gas discharged from the battery cell 2 can be discharged into the exhaust channel 3 more quickly through the first opening 103.

[0116] In some embodiments, among two or more sub-channels 311, the sub-channel 311 located on the side of the sidewall 12 facing the bottom wall 11 and the second channel 32 are connected.

[0117] In these embodiments, among the multiple sub-channels 311, the sub-channel 311 near the bottom wall 11 and the second channel 32 are connected, and the connecting hole 121a is used to connect the sub-channel 311 near the bottom wall 11 and the second channel 32.

[0118] In some embodiments, such as Figure 10 and Figure 11 As shown, the first outer plate 122 is provided with a second opening 104 that communicates with the first channel, and the second opening 104 is interconnected with two or more sub-channels 311.

[0119] In these embodiments, the second opening 104 is simultaneously connected to multiple sub-channels 311, so that the gas in the multiple sub-channels 311 can be directly discharged through the second opening 104, thereby increasing the gas flow rate.

[0120] Optionally, the second opening 104 can be formed at the location of the reinforcing plate 123, and the second opening 104 can expose a portion of the reinforcing plate 123 and the sub-channels 311 located on both sides of the reinforcing plate 123. For example, the second opening 104 can expose portions of the two reinforcing plates 123, portions of the sub-channels 311 located between the two reinforcing plates 123, and portions of the sub-channels 311 located on both sides of the two reinforcing plates 123.

[0121] In some embodiments, the battery cell 2 includes a pressure relief mechanism, which is disposed on the side of the battery cell 2 facing the first opening 103.

[0122] In these embodiments, when the first opening 103 is provided on the bottom wall 11, the pressure relief mechanism can be provided on the side of the battery cell 2 facing the bottom wall 11, which can reduce the distance between the pressure relief mechanism and the first opening 103, so that the gas leaking from the pressure relief mechanism can be discharged from the first opening 103 more quickly.

[0123] In some embodiments, such as Figures 12 to 13 As shown, the second opening 104 is provided with a second sealing component 5, which is bonded or welded to the second wall panel 102. The second sealing component 5 can be an explosion-proof valve. Optionally, when the second opening 104 is located on the first outer panel 122, the second sealing component 5 is bonded or welded to the first outer panel 122.

[0124] In these embodiments, the second sealing component 5 is disposed at the second opening 104, which can improve the problem of dust and other impurities entering the exhaust passage 3 through the second opening 104.

[0125] Optionally, the second sealing component 5 may include a sealing plate 51 and an extension 52 connected to each other, the extension 52 extending into the second opening 104, and a portion of the extension 52 may be located between the first inner plate 121 and the first outer plate 122. The sealing plate 51 covers the second opening 104.

[0126] Secondly, embodiments of this application provide an electrical device, including the battery device 20 described in the second aspect embodiment above.

[0127] Please see Figures 4 to 13As shown, this application embodiment provides a battery device 20, including: a housing 1, including a bottom wall 11, a side wall 12 connected to the bottom wall 11, and an accommodating space formed by the bottom wall 11 and the side wall 12, the side wall 12 including a first inner plate 121 and a first outer plate 122 spaced apart in a direction away from the accommodating space; a battery cell 2, the battery cell 2 being disposed in the accommodating space, and the battery cell 2 including a pressure relief mechanism, the pressure relief mechanism being disposed corresponding to a first opening 103; an exhaust channel 3, the exhaust channel 3 including a first channel 31 located between the first inner plate 121 and the first outer plate 122; wherein, the side wall 12 also includes a reinforcing plate 123, the reinforcing plate 123 being connected between the first inner plate 121 and the first outer plate 122 to divide the first channel 31 into two or more sub-channels 311, the reinforcing plate 123 having a through first connecting opening 123a, and two adjacent sub-channels 311 being interconnected through the first connecting opening 123a. The bottom wall 11 includes a second inner plate 111 and a second outer plate 112 spaced apart in a direction away from the receiving space. The exhaust channel 3 also includes a second channel 32 located between the second inner plate 111 and the second outer plate 112, and the second channel 32 is interconnected with the first channel 31. The second inner plate 111 is provided with a first opening 103 communicating with the second channel 32; the first outer plate 122 is provided with a second opening 104 communicating with the first channel 31. There are multiple battery cells 2, and multiple first openings 103, with each first opening 103 corresponding to each battery cell 2. The second inner plate 111 includes a body portion 111a and a protrusion 111b. The protrusion 111b is connected to the side of the body portion 111a facing the side wall 12, and protrudes towards the receiving space. The second channel 32 includes a first sub-chamber 321 and a second sub-chamber 322 that are interconnected. The first sub-chamber 321 is formed by the protrusion 111b and the second outer plate 112. The second sub-chamber 322 is formed by the body portion 111a and the second outer plate 112. The connecting hole 121a is interconnected with the first sub-chamber 321. The second opening 104 is interconnected with two or more sub-channels 311.

[0128] In some embodiments, such as Figure 8 As shown, the first inner plate 121 and the first outer plate 122 are arranged side by side along the first direction X. The first connecting opening 123a penetrates the reinforcing plate 123 along the second direction Y. The first connecting opening 123a is located at the end of the side wall 12 in the third direction Z, and the first connecting opening 123a and the edge of the reinforcing plate 123 are connected. The first direction X, the second direction Y and the third direction Z intersect each other.

[0129] In other embodiments, such as Figure 9As shown, a bottom plate 124 is also provided on the side of the sidewall 12 facing the bottom wall 11. The bottom plate 124 is connected between the first outer plate 122 and the first inner plate 121. A sealing element 125 is provided on the side of the bottom plate 124 away from the first inner plate 121 and the first outer plate 122. The bottom plate 124 is provided with a second connecting opening 124a. The second connecting opening 124a and the sealing element 125 are misaligned, and the second connecting opening 124a and the first connecting opening 123a are arranged side by side and correspondingly.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall enclosing a containing space, the side wall comprising a first inner plate and a first outer plate arranged in a spaced manner away from the containing space, the bottom wall being provided with a first opening on a side facing the containing space; a battery cell arranged in the containing space, the battery cell comprising a pressure relief mechanism corresponding to the first opening; an exhaust passage comprising a first passage between the first inner plate and the first outer plate, the first passage being in communication with the first opening; wherein the side wall further comprises a reinforcing plate connected between the first inner plate and the first outer plate to divide the first passage into two or more sub-passages, the reinforcing plate having a first communication opening arranged therethrough, and adjacent two of the sub-passages being in communication with each other through the first communication opening.

2. The battery device according to claim 1, characterized by The first inner plate and the first outer plate are arranged side by side along a first direction, the first communication opening penetrates the reinforcing plate along a second direction, the first communication opening is arranged at an end of the side wall in a third direction, and the first communication opening penetrates an edge of the reinforcing plate, the first direction, the second direction and the third direction intersecting with each other.

3. The battery device of claim 1, wherein The side wall further comprises a bottom plate arranged on a side facing the bottom wall, the bottom plate being connected between the first outer plate and the first inner plate, a sealing member being arranged on a side of the bottom plate facing away from the first inner plate and the first outer plate, the bottom plate being provided with a second communication opening, the second communication opening being staggered with the sealing member, and the second communication opening and the first communication opening being arranged side by side correspondingly.

4. The battery device of claim 1, wherein The bottom wall comprises a second inner plate and a second outer plate arranged in a spaced manner away from the containing space, the exhaust passage further comprises a second passage between the second inner plate and the second outer plate, the first opening and the second passage being in communication, and the second passage and the first passage being in communication with each other.

5. The battery device of claim 4, wherein, The second inner plate is provided with the first opening; and / or, the first outer plate is provided with a second opening in communication with the first passage.

6. The battery device of claim 5, wherein, The second inner plate is provided with the first opening in communication with the second passage, the number of battery cells is a plurality, and the number of first openings is a plurality, each of the first openings corresponding to the pressure relief mechanism of each of the battery cells.

7. The battery device of claim 4, wherein The first inner plate is provided with a third opening in communication with the first passage, and the third opening is provided with a first blocking member bonded or welded to the first inner plate.

8. The battery device of claim 4, wherein The first inner plate is provided with a communication hole, and the first passage and the second passage are in communication with each other through the communication hole.

9. The battery device according to claim 8, wherein the second inner plate comprises a body portion and a protruding portion connected to a side of the body portion facing the side wall, and the protruding portion is arranged protruding towards the containing space relative to the body portion; The second channel comprises a first sub-chamber and a second sub-chamber in communication with each other, the first sub-chamber being formed by the protruding portion and the second outer plate, and the second sub-chamber being formed by the body portion and the second outer plate, the communication hole and the first sub-chamber being in communication with each other.

10. The battery device of claim 4, wherein Among the two or more sub-channels, the sub-channels located on the side of the side wall facing the bottom wall are in communication with the second channel.

11. The battery device of claim 1, wherein The first outer plate is provided with a second opening in communication with the first channel, and the second opening and the two or more sub-channels are in communication with each other.

12. An electrical device, characterized by A battery device comprising any one of claims 1-11.

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