Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a box body which is internally provided with a containing cavity; the single battery is arranged in the accommodating cavity, and at least one wall part of the single battery is provided with an anti-explosion valve; the heat exchange piece is arranged in the containing cavity, an exhaust channel is formed between the heat exchange piece and the box body, the heat exchange piece is matched with the wall part provided with the anti-explosion valve in a heat exchange mode, the heat exchange piece comprises a heat exchange area and an exhaust area, a heat exchange runner is arranged in the heat exchange area, and the exhaust area is arranged in the heat exchange area. And the exhaust area is configured to be capable of communicating the anti-explosion valve and the exhaust channel when the battery monomers are in thermal runaway. According to the battery device, the heat exchange piece can achieve heat exchange and can also achieve the effects of partition and exhaust in the battery device, that is, the heat exchange piece integrates the heat exchange and exhaust effects at the same time, the overall structure of the battery device can be effectively simplified, and the energy density of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Art

[0002] Battery cells generate heat and gas during the cycle process. A battery device usually includes multiple battery cells. When the internal heat or gas pressure of one or more battery cells reaches a threshold, a valve blowout will occur. At the same time, in order to reduce the impact of the valve blowout process on other normally working battery cells, a structure for isolation and exhaust needs to be set in the battery device.

[0003] However, the structures used for partitioning and exhaust in current battery devices are relatively complex, which not only makes the overall structure of the battery device complex, but also reduces the space utilization inside the battery device, which is not conducive to improving the energy density of the battery device. Utility Model Content

[0004] Based on this, it is necessary to provide a battery device and electrical equipment to address the problem that the structure used for partition and exhaust in the current battery device is relatively complex, which not only makes the overall structure of the battery device complicated, but also reduces the space utilization inside the battery device, which is not conducive to improving the energy density of the battery device.

[0005] In the first aspect, the present application provides a battery device, including a box body, a battery cell and a heat exchanger, wherein the box body has a accommodating cavity inside; the battery cell is arranged in the accommodating cavity, and the bottom wall of the battery cell is provided with an explosion-proof valve; the heat exchanger is arranged in the accommodating cavity, and an exhaust channel is formed between the heat exchanger and the bottom wall of the box body, and the heat exchanger cooperates with the bottom wall of the battery cell for heat exchange. The heat exchanger includes a heat exchange area and an exhaust area, and the heat exchange area has a heat exchange flow channel inside. The exhaust area is configured to be able to connect the explosion-proof valve and the exhaust channel when the battery cell has thermal runaway.

[0006] Through the above structure, the heat exchange element can not only realize the heat exchange of the battery cells, but also play the role of isolation and exhaust in the battery device. In other words, the heat exchange element integrates the functions of heat exchange and exhaust at the same time, which can effectively simplify the overall structure of the battery device and improve the energy density of the battery device.

[0007] Furthermore, the battery cell terminals are typically located on the top cover of the battery cell. Therefore, when the heat exchange element is positioned between the bottom wall of the battery cell and the bottom wall of the casing, on the one hand, the contact area between the heat exchange element and the bottom wall of the battery cell is larger, that is, the heat exchange area is larger, which can improve heat exchange efficiency. On the other hand, the electrolyte inside the battery cell is affected by gravity and tends to accumulate at the bottom of the battery cell. Therefore, when the heat exchange element cooperates with the bottom wall of the battery cell to exchange heat, the heat exchange efficiency can be further improved.

[0008] In some embodiments, the exhaust region is provided with an exhaust hole connected to the exhaust channel along the thickness direction of the heat exchange element, and the exhaust hole is correspondingly arranged to the explosion-proof valve. Thus, the exhaust hole can achieve communication between the explosion-proof valve and the exhaust channel, thereby achieving pressure relief and exhaust of the battery cell.

[0009] In some embodiments, the battery cells include multiple battery cells, all of which are arranged in multiple columns along a first direction and in multiple rows along a second direction intersecting the first direction; wherein, the exhaust holes include multiple exhaust holes, which are arranged one-to-one corresponding to each explosion-proof valve.

[0010] Through the above structure, each exhaust hole is set corresponding to an explosion-proof valve, that is, each exhaust hole realizes the exhaust of the corresponding explosion-proof valve, so that the heat exchange component can isolate the exhaust of each battery cell through different exhaust holes, making the battery cell exhaust process more reliable.

[0011] In some embodiments, the bottom wall of the box is recessed in a direction away from the battery cells to form a plurality of first ribs, each of which extends in the second direction and is spaced apart along the first direction; wherein a first exhaust sub-channel is formed between each first rib and the heat exchange element, and each first rib is arranged corresponding to each explosion-proof valve on a row of battery cells.

[0012] By providing the first concave rib, the gas discharged from the explosion-proof valve is collected and guided, so that the gas can be discharged more quickly and smoothly.

[0013] In some embodiments, in the first direction, the width of each first rib is not less than the width of the corresponding exhaust hole.

[0014] With the above structure, the first exhaust sub-channel formed by the first concave ribs can better adapt to the exhaust volume of the exhaust hole, so that the gas can be smoothly collected through the first concave ribs and discharged from the box.

[0015] In some embodiments, the bottom wall of the box body is recessed in a direction away from the battery cell to form a plurality of second ribs, each of which extends in the first direction and is spaced apart in the second direction; wherein a second exhaust sub-channel is formed between each second rib and the heat exchange element, and each second exhaust sub-channel is connected to at least part of the first exhaust sub-channel and together form an exhaust channel.

[0016] Through the above structure, the second exhaust sub-channel formed by the second concave rib can form a criss-cross exhaust channel together with the first exhaust sub-channel, realizing the connection between all explosion-proof valves and exhaust holes, which can better collect the exhausted gas and discharge it smoothly.

[0017] In some embodiments, all the second ribs include one main rib and at least one secondary rib, and each secondary rib is arranged on opposite sides of the main rib along the second direction; wherein, in the second direction, the width of the main rib is greater than the width of all the secondary ribs.

[0018] Therefore, by setting the width of the main concave rib to be larger than that of the secondary concave rib, all the gas can be gathered in the main concave rib, and then the gas is gathered through the main concave rib and finally discharged.

[0019] In some embodiments, a balancing valve is provided on the bottom wall of the box body. The balancing valve is communicated with the accommodating chamber and is used to balance the air pressure between the accommodating chamber and the external environment.

[0020] Through the above structure, the heat exchange component cooperates with the bottom wall of the battery cell to increase the heat exchange area, improve the heat exchange efficiency, and enable the gas ejected from the explosion-proof valve to eventually converge to the balancing valve through the main concave rib and be smoothly discharged out of the box through the balancing valve.

[0021] In some embodiments, the bottom wall of the main rib is recessed in a direction away from the battery cell to form a sunken portion, the sunken portion forms a groove communicating with the accommodating cavity, and a mounting hole for mounting a balancing valve is provided on the bottom wall of the groove.

[0022] This structure allows the gas inside the box to be more smoothly collected in the groove and then discharged out of the box through the balancing valve. Furthermore, the balancing valve is set lower than the bottom wall of the box, which allows it to be better accommodated in the groove and reduces the probability of interference between the balancing valve and the battery cells in the height direction of the box.

[0023] In some embodiments, the sunken portion is centrally located on the bottom wall of the box. This shortens and makes the distances between the explosion-proof valves, exhaust holes, and the balancing valve more uniform, allowing gas to flow more quickly and smoothly from the exhaust holes into the grooves and ultimately be discharged smoothly from the box through the balancing valve.

[0024] In some embodiments, a thermally conductive structural adhesive is filled between the bottom wall of each battery cell and the heat exchange element for adhesive connection. Thus, the thermally conductive structural adhesive not only serves to connect and secure the bottom wall of the battery cell and the heat exchange element, but also improves the thermal conductivity of the battery cell.

[0025] In some embodiments, the battery device also includes a plurality of rubber strips arranged between the bottom wall of each battery cell and the heat exchange element, and each rubber strip extends along the second direction; wherein, every two rubber strips form a group, and each group of rubber strips is arranged at intervals along the first direction at the opposite ends of a corresponding row of explosion-proof valves.

[0026] In this way, the two rubber strips in each group can isolate the explosion-proof valve between the two, reduce the probability of the thermal conductive structural adhesive between the battery cell and the heat exchange component overflowing to the exhaust hole, and improve the sealing reliability between the battery cell and the heat exchange component.

[0027] In some embodiments, the space between the bottom wall of the housing and the heat exchange area is filled with expansion adhesive. Initially, the expansion adhesive is soft and can effectively absorb contour tolerances, providing sufficient expansion space for the battery cells. Furthermore, after curing, the expansion adhesive provides a stable connection between the heat exchange element and the housing, while also providing excellent sealing performance.

[0028] In a second aspect, the present application also provides an electrical device comprising the battery device as described above.

[0029] In some embodiments, the electrical equipment includes a vehicle, the body of the vehicle has a bottom plate with an opening on the bottom plate; the bottom wall of the box body is recessed in a direction away from the battery cell to form a sunken portion, the sunken portion forms a groove connected to the accommodating cavity, and a balancing valve is provided on the bottom wall of the groove; wherein, at least part of the sunken portion is arranged in the opening so that the balancing valve connects the accommodating cavity with the external environment of the vehicle body.

[0030] With the above structure, the gas in the battery device can be directly discharged outside the vehicle body through the balancing valve, so that the gas can be kept away from the passenger compartment of the vehicle, thereby improving the performance of the battery device.

[0031] In some embodiments, the electrical device further includes a sealant disposed around the outer periphery of the sunken portion and sealingly connected between the sunken portion and the bottom plate. Thus, the provision of the sealant can improve the sealing performance between the battery device and the bottom plate.

[0032] In the above-mentioned battery device and electrical equipment, an exhaust channel is formed between the heat exchange component and the box body, and the heat exchange component cooperates with the battery cell for heat exchange, which can exchange heat for the battery cell and improve the stability of the battery cell; at the same time, an exhaust hole is also provided on the heat exchange component, and the exhaust hole is arranged corresponding to the explosion-proof valve. In this way, while achieving heat exchange, the heat exchange component can also guide the gas discharged from the explosion-proof valve into the exhaust channel, thereby playing the role of isolation and exhaust. In other words, the heat exchange component integrates the functions of heat exchange and exhaust at the same time, which can effectively simplify the overall structure of the battery device and improve the energy density of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments.

[0034] Figure 2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments.

[0035] Figure 3is a schematic diagram of the exploded structure of a battery cell according to one or more embodiments.

[0036] Figure 4 is a top view of a battery device according to one or more embodiments.

[0037] Figure 5 is a cross-sectional view of a battery device according to one or more embodiments.

[0038] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0039] Figure 7 Schematic diagram of the structure of a heat exchange element in a battery device according to one or more embodiments.

[0040] Figure 8 FIG1 is a schematic diagram of a partial structure of a battery device according to one or more embodiments applied to a vehicle.

[0041] Figure 9 Schematic diagram of the structure of a box in a battery device according to one or more embodiments.

[0042] Explanation of the accompanying drawings: 1000, vehicle; 100, battery device; 200, controller; 300, motor; 400, bottom plate; 500, opening; 600, seal; 10, box body; 20, battery cell; 30, heat exchange component; 40, rubber strip; 11, first part; 12, second part; 13, accommodating chamber; 14, balancing valve; 15, sinking part; 16, groove; 17, mounting hole; 18, first concave rib; 19, second concave rib; 21, top cover; 22, shell; 23, electrode assembly; 24, explosion-proof valve; 31, heat exchange area; 32, exhaust area; 33, heat exchange flow channel; 34, exhaust hole; 191, main concave rib; 192, secondary concave rib; 331, main flow channel; 332, branch flow channel; 333, outlet; 334, inlet; a, first direction; b, second direction. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] Currently, market developments indicate that battery applications are becoming increasingly widespread. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. As the power battery market continues to expand, market demand is also growing.

[0050] Among them, the battery cell is the smallest unit that makes up the battery device. The battery cell usually includes a shell, a top cover and an electrode assembly. The top cover and the shell can be combined to form a storage space for accommodating the electrode assembly, and the storage space is filled with electrolyte to allow the electrolyte to penetrate the electrode assembly to achieve normal operation of the battery cell.

[0051] During the cycling of a battery cell, chemical reactions occur between the electrode assembly and the electrolyte within it, generating heat and gas. To facilitate the discharge of these gases, a pressure relief structure, such as an explosion-proof valve, is typically installed within the cell. When the pressure inside the cell reaches a threshold, the explosion-proof valve opens under the impact of the gas, releasing pressure and venting the cell.

[0052] A battery system may include one or more battery cells, typically arranged within a housing. When the internal heat or pressure of one or more battery cells reaches a threshold, the explosion-proof valve opens, causing a blowout. The high-temperature fluid ejected from the explosion-proof valve may affect the functioning of other nearby battery cells.

[0053] Therefore, a barrier and exhaust structure is typically installed inside the battery device. This structure can block the high-temperature medium ejected by one or more battery cells, reducing the possibility of the high-temperature medium affecting the normal operation of other battery cells nearby. At the same time, this structure can also discharge the gas ejected from the battery cells into the casing, allowing the battery device to continue operating.

[0054] However, the structures used for partitioning and exhaust in current battery devices are relatively complex, which not only makes the overall structure of the battery device complex, but also reduces the space utilization inside the battery device, which is not conducive to improving the energy density of the battery device.

[0055] Based on the above considerations, in order to solve the problem that the structure used for isolation and exhaust in the current battery device is relatively complex, which not only makes the overall structure of the battery device complicated, but also reduces the space utilization rate inside the battery device, which is not conducive to improving the energy density of the battery device, a battery device is proposed in one or more embodiments of the present application, in which an exhaust channel is formed between the heat exchanger and the housing, and the heat exchanger cooperates with the battery cell for heat exchange, which can exchange heat with the battery cell and improve the stability of the battery cell. At the same time, an exhaust hole is also provided on the heat exchanger, and the exhaust hole is arranged corresponding to the explosion-proof valve. In this way, while achieving heat exchange, the heat exchanger can also guide the gas discharged from the explosion-proof valve into the exhaust channel, thereby playing the role of isolation and exhaust. In other words, the heat exchanger integrates the functions of heat exchange and exhaust at the same time, which can effectively simplify the overall structure of the battery device and improve the energy density of the battery device.

[0056] It should be noted that the battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0057] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells into a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0058] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0059] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0060] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0061] The battery device disclosed in the embodiments of the present application can be used in, but is not limited to, electrical equipment such as vehicles, ships, or aircraft.

[0062] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may include, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0063] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0064] Please refer to Figure 1 The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0065] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0066] Please refer to Figure 2 The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 is used to provide a storage space for the battery cell 20, and the housing 10 can have a variety of structures. In some embodiments, the housing 10 can include a first portion 11 and a second portion 12, which cover each other and together define a storage space for the battery cell 20. The second portion 12 can be a hollow structure with one end open, and the first portion 11 can be a plate-like structure, with the first portion 11 covering the open side of the second portion 12, so that the first portion 11 and the second portion 12 together define a storage space. The first portion 11 and the second portion 12 can also be hollow structures with one end open, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have a variety of shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0067] In the battery device 100, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 20 may be housed within the housing 10. Alternatively, the battery device 100 may comprise multiple battery cells 20 connected in series, in parallel, or in a hybrid connection to form a battery module, which is then further connected in series, in parallel, or in a hybrid connection to form a single unit and housed within the housing 10. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0068] Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0069] Please refer to Figure 3 A battery cell 20 is the smallest unit that makes up a battery. A battery cell 20 typically includes a top cover 21, a housing 22, an electrode assembly 23, and other functional components. The top cover 21 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the top cover 21 can be adapted to the shape of the housing 22 to match the housing 22. Functional components such as electrode terminals, also known as electrode posts, can be provided on the top cover 21. The electrode terminals can be used to electrically connect to the electrode assembly 23 to output or input electrical energy from the battery cell 20. In some embodiments, the top cover 21 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In some embodiments, an insulating member can also be provided on the inner side of the top cover 21 to isolate the electrical connection components in the housing 22 from the top cover 21 to reduce the risk of short circuits. Exemplary insulating members can be made of plastic, rubber, etc.

[0070] The shell 22 is a component used to cooperate with the top cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The shell 22 and the top cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the top cover 21. Without limitation, the top cover 21 and the shell 22 can also be integrated. Specifically, the top cover 21 and the shell 22 can form a common connection surface before other components are put into the shell. When the interior of the shell 22 needs to be encapsulated, the top cover 21 is covered with the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23.

[0071] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly composed of a positive electrode sheet, a separator, and a negative electrode sheet. Specifically, the positive electrode active material and the negative electrode active material are coated on the current collector respectively, thereby forming a positive electrode sheet and a negative electrode sheet respectively. The positive electrode sheet and the negative electrode sheet are wound or stacked, and the separator is arranged between the positive electrode sheet and the negative electrode sheet, thereby forming the electrode assembly 23. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 23, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the tab. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current circuit.

[0072] Please also refer to Figure 4 、 Figure 5 、 Figure 6 as well as Figure 7 An embodiment of the present application provides a battery device 100, comprising a housing 10, a battery cell 20, and a heat exchanger 30. The housing 10 has an interior containing a chamber 13, the battery cell 20 is disposed within the chamber 13, and an explosion-proof valve 24 is provided on the bottom wall of the battery cell 20. The heat exchanger 30 is disposed within the chamber 13 and forms an exhaust passage with the bottom wall of the housing 10. The heat exchanger 30 cooperates with the bottom wall of the battery cell 20 for heat exchange. The heat exchanger 30 includes a heat exchange area 31 and an exhaust area 32. The heat exchange area 31 has a heat exchange flow channel 33. The exhaust area 32 is configured to connect the explosion-proof valve 24 and the exhaust passage when the battery cell 20 experiences thermal runaway.

[0073] It should be noted that the interior of the box body 10 is hollow to form a receiving cavity 13 . The battery cells 20 and other functional components can be disposed in the receiving cavity 13 and assembled together to form the battery device 100 .

[0074] The battery cell 20 may include one or more cells, all of which are disposed within the accommodating cavity 13. The battery cell 20 generally includes a housing 22, a top cover 21, and an electrode assembly 23. The housing 22 and the top cover 21 together form a space for accommodating the electrode assembly 23. The top cover 21 is configured as one of the walls of the battery cell 20. The housing 22 includes a bottom wall and side walls surrounding the bottom wall. The bottom wall and side walls of the housing 22 are respectively configured as the walls of the battery cell 20.

[0075] Furthermore, at least one wall portion of the battery cell 20 is provided with an explosion-proof valve 24 . For example, the explosion-proof valve 24 may be provided on the top cover 21 , or on the bottom wall or side wall of the housing 22 .

[0076] When each battery cell 20 is disposed in the accommodating cavity 13 , the bottom wall of each battery cell 20 is supported on the bottom wall of the box body 10 , and the top cover 21 of each battery cell 20 is disposed toward the top wall of the box body 10 .

[0077] The heat exchanger 30 is a component that exchanges heat with each battery cell 20 within the housing 10 to maintain the temperature of the battery cells 20 within a suitable range. Specifically, the heat exchanger 30 can be, but is not limited to, a water-cooled plate, which is placed in contact with the wall of the battery cell 20 provided with the explosion-proof valve 24 to achieve heat exchange coordination.

[0078] The heat exchange element 30 can be spaced apart from the wall of the housing 10 to form an exhaust passage between the two. That is, when a battery cell 20 explodes, gas ejected from the explosion-proof valve 24 enters the exhaust passage between the heat exchange element 30 and the housing 10 through the corresponding exhaust holes 34, then gathers in the exhaust passage and is discharged outside the housing 10.

[0079] When the explosion-proof valve 24 is disposed on the top cover 21 of the battery cell 20, the heat exchange element 30 can be disposed between the top cover 21 of the battery cell 20 and the top wall of the housing 10. When the explosion-proof valve 24 is disposed on the bottom wall of the battery cell 20, the heat exchange element 30 can be disposed between the bottom wall of the battery cell 20 and the bottom wall of the housing 10.

[0080] Furthermore, the heat exchange element 30 includes a heat exchange area 31 and an exhaust area 32. The heat exchange area 31 has a heat exchange channel 33 inside. A heat exchange medium, such as condensed water, can be passed into the heat exchange channel 33. When the heat exchange medium flows in the heat exchange channel 33, it can exchange heat with the battery cell 20.

[0081] Through the above structure, the heat exchange element 30 can not only realize the heat exchange of the battery cell 20, but also play the role of isolation and exhaust in the battery device 100. In other words, the heat exchange element 30 integrates the functions of heat exchange and exhaust at the same time, which can effectively simplify the overall structure of the battery device 100 and improve the energy density of the battery device 100.

[0082] In some embodiments, an exhaust hole 34 communicating with the exhaust channel is provided through the heat exchange element 30 along its thickness direction, and the exhaust hole 34 is provided corresponding to the explosion-proof valve 24 .

[0083] Specifically, the exhaust area 32 is provided with exhaust holes 34 extending through the thickness of the heat exchange element 30. This allows the exhaust holes 34 to align with the explosion-proof valves 24 when the heat exchange element 30 is positioned correspondingly to the wall portion of the battery cell 20 where the explosion-proof valves 24 are located. When a corresponding battery cell 20 experiences a valve failure, the expelled gas can be discharged through the corresponding exhaust holes 34 into the space between the heat exchange element 30 and the housing 10, and ultimately out of the housing 10.

[0084] That is, a corresponding exhaust channel can be defined between each exhaust hole 34 and the box body 10, and the gas in the explosion-proof valve 24 can be discharged outside the box body 10 through the corresponding exhaust channel, reducing the impact on other battery cells 20 that are working normally around it.

[0085] In addition, since the heat exchange channel 33 and the exhaust hole 34 are respectively arranged in the heat exchange area 31 and the exhaust area 32, the heat exchange channel 33 and the exhaust hole 34 are not connected and do not affect each other.

[0086] Thus, the explosion-proof valve 24 and the exhaust passage can be connected through the exhaust hole 34 , thereby achieving pressure relief and exhaust of the battery cell 20 .

[0087] It is understandable that in some other embodiments, the exhaust area 32 may also be provided with other pressure relief structures, such as a weak portion. When the battery cell 20 undergoes thermal runaway, the internal air pressure rushes out and destroys the weak portion, allowing the exhaust area 32 to smoothly connect to the explosion-proof valve 24 and the exhaust channel.

[0088] like Figure 4 As shown, in some embodiments, a plurality of battery cells 20 are provided, and all of the battery cells 20 are arranged in multiple columns along a first direction a and in multiple rows along a second direction b intersecting the first direction a. The explosion-proof valve 24 is disposed on the bottom wall of the corresponding battery cell 20, the heat exchange element 30 is located between the bottom wall of the battery cell 20 and the bottom wall of the housing 10, and a plurality of exhaust holes 34 are provided, one corresponding to each explosion-proof valve 24.

[0089] Specifically, the first direction a and the second direction b can be perpendicular to each other and parallel to the bottom wall of the box body 10. When the battery cells 20 are arranged in the accommodating cavity 13, the battery cells 20 are arranged in multiple columns along their width direction and in multiple rows along their thickness direction. In this way, the first direction a can be the width direction of each battery cell 20, and the second direction b can be the thickness direction of each battery cell 20.

[0090] It should be noted that a battery cell 20 typically includes two large surfaces, two side surfaces, a bottom surface, and a top surface. The two large surfaces are parallel to each other, the two side surfaces are parallel to each other, the bottom surface and the top surface are parallel to each other, and the large surfaces are perpendicular to the side surfaces, bottom surface, and top surface. In other words, the two large surfaces, two side surfaces, bottom surface, and top surface together enclose a rectangular structure.

[0091] The large surface refers to the largest surface of the battery cell 20. The thickness of the battery cell 20 is perpendicular to the large surface, the width of the battery cell 20 is perpendicular to the side surface, and the height of the battery cell 20 is perpendicular to the bottom and top surfaces.

[0092] When all battery cells 20 are arranged in the accommodating cavity 13, the heat exchange element 30 also includes multiple exhaust holes 34, and each exhaust hole 34 is corresponding to an explosion-proof valve 24. In other words, each exhaust hole 34 is aligned with an explosion-proof valve 24 along the height direction of the battery cells 20, so that the gas in the explosion-proof valve 24 can be discharged through the corresponding exhaust hole 34.

[0093] Through the above structure, each exhaust hole 34 is set corresponding to an explosion-proof valve 24, that is, each exhaust hole 34 realizes the exhaust of the corresponding explosion-proof valve 24, so that the heat exchange component 30 can isolate the exhaust of each battery cell 20 through different exhaust holes 34, making the exhaust process of the battery cell 20 more reliable.

[0094] like Figure 9 As shown, in some embodiments, the bottom wall of the housing 10 is recessed in a direction away from the battery cells 20 to form a plurality of first ribs 18. Each first rib 18 extends along the second direction b and is spaced apart along the first direction a. A first exhaust sub-channel is formed between each first rib 18 and the heat exchange element 30, and each first rib 18 is corresponding to each explosion-proof valve 24 on a row of battery cells 20.

[0095] Specifically, the bottom wall of the housing 10 is recessed in a direction away from the battery cells 20 to form a plurality of first ribs 18. That is, the bottom wall of the housing 10 protrudes downward to form a plurality of convex portions, and the interior of each convex portion is recessed downward relative to the bottom wall of the accommodating cavity 13, forming a first rib 18. Thus, the interior of each first rib 18 can communicate with each vent hole 34, forming a first vent sub-channel for gas circulation.

[0096] By providing the first concave rib 18 , the gas discharged from the explosion-proof valve 24 is collected and guided, so that the gas can be discharged more quickly and smoothly.

[0097] In some embodiments, in the first direction, the width of each first rib 18 is not less than the width of the corresponding exhaust hole 34 .

[0098] Specifically, each first concave rib 18 corresponds to a column of battery cells 20 , and each first concave rib 18 is aligned with the explosion-proof valve 24 on the battery cells 20 in the corresponding column.

[0099] Therefore, through the above structure, the first exhaust sub-channel formed by the first concave ribs 18 can better adapt to the exhaust volume of the exhaust hole 34, so that the gas can be smoothly collected and discharged from the box body 10 through each first concave rib 18.

[0100] In some embodiments, the bottom wall of the housing 10 is recessed in a direction away from the battery cells 20 to form a plurality of second ribs 19. Each second rib 19 extends along the first direction a and is spaced apart along the second direction b. A second exhaust sub-channel is formed between each second rib 19 and the heat exchange element 30. Each second exhaust sub-channel communicates with at least a portion of the first exhaust sub-channel to form an exhaust channel.

[0101] Specifically, the bottom wall of the box body 10 is recessed in a direction away from the battery cells 20 to form a plurality of second ribs 19. That is, the bottom wall of the box body 10 protrudes downward to form a plurality of convex portions, and the interior of each convex portion is recessed downward relative to the bottom wall of the accommodating cavity 13 to form a second rib 19. Thus, the interior of each second rib 19 forms a second exhaust sub-channel for gas circulation.

[0102] Furthermore, each first concave rib 18 extends along the second direction b, and each second concave rib 19 extends along the first direction a. In other words, each first concave rib 18 and each second concave rib 19 are disposed transversely and longitudinally with respect to each other, and each first exhaust sub-channel and each second exhaust sub-channel are interconnected and connected to each exhaust hole 34.

[0103] In this way, when the explosion-proof valves 24 of one or more battery cells 20 are opened, the gas is discharged from the corresponding explosion-proof valves 24 to the corresponding exhaust holes 34, and then enters the first exhaust sub-channel or the second exhaust sub-channel from the corresponding exhaust holes 34, and is collected and discharged through the first exhaust sub-channel or the second exhaust sub-channel.

[0104] With this structure, the second exhaust sub-channels formed by the second ribs 19 can, together with the first exhaust sub-channels, form a crisscross pattern of exhaust channels, ensuring connectivity between all explosion-proof valves 24 and exhaust holes 34. This allows for better collection and smooth discharge of exhausted gas. In some embodiments, all second ribs 19 include a primary rib 191 and at least one secondary rib 192, with each secondary rib 192 positioned on opposite sides of the primary rib 191 along the second direction b. In the second direction b, the width of the primary rib 191 is greater than the width of all secondary ribs 192.

[0105] Specifically, the second ribs 19 may include a plurality of ribs spaced apart from each other along the second direction b, including a main rib 191 and secondary ribs 192 in addition to the main rib 191. The main rib 191 is centrally located along the second direction b, and the secondary ribs 192 are located on opposite sides of the main rib 191 along the second direction b.

[0106] The main concave ribs 191 and the secondary concave ribs 192 are both connected to the first concave ribs 18 , and the gas is finally collected to the main concave ribs 191 through the cooperation between the secondary concave ribs 192 and the first concave ribs 18 . The gas is then collected by the main concave ribs 191 and finally discharged.

[0107] Therefore, by setting the width of the primary concave rib 191 to be larger than the secondary concave rib 192 , all the gas can be collected in the primary concave rib 191 , and then the gas is collected through the primary concave rib 191 and finally discharged.

[0108] Please also refer to Figure 5 、 Figure 6 as well as Figure 8 In some embodiments, a balancing valve 14 is provided on the bottom wall of the box body 10. The balancing valve 14 is communicated with the accommodating chamber 13 and is used to balance the air pressure between the accommodating chamber 13 and the external environment.

[0109] Specifically, the balancing valve 14 refers to a component that can achieve air pressure balance inside and outside the box body 10. That is, when the air pressure in the accommodating chamber 13 is too high, the balancing valve 14 can discharge the gas in the accommodating chamber 13 to the outside of the box body 10, and when the air pressure in the accommodating chamber 13 is too low, the balancing valve 14 can allow the gas outside the box body 10 to enter the accommodating chamber 13.

[0110] The explosion-proof valve 24 is disposed on the bottom wall of the corresponding battery cell 20 . When the battery cell 20 is disposed in the accommodating cavity 13 , the explosion-proof valve 24 on the battery cell 20 is disposed toward the bottom wall of the box body 10 .

[0111] The heat exchange element 30 is positioned between the bottom wall of the battery cell 20 and the bottom wall of the housing 10, with the heat exchange element 30 and the bottom wall of the battery cell 20 in close contact. This increases the contact area between the heat exchange element 30 and the bottom wall of the battery cell 20, resulting in a larger heat exchange area and improved heat exchange efficiency. Furthermore, the electrolyte within the battery cell 20 is affected by gravity and tends to accumulate at the bottom of the cell 20. Therefore, the heat exchange element 30 and the bottom wall of the battery cell 20, when working together to exchange heat, can further improve heat exchange efficiency.

[0112] Therefore, through the above structure, the heat exchange component 30 cooperates with the bottom wall of the battery cell 20 to increase the heat exchange area, improve the heat exchange efficiency, and enable the gas ejected from the explosion-proof valve 24 to finally converge from the main concave rib 191 to the balancing valve 14 and be smoothly discharged outside the box body 10 through the balancing valve 14.

[0113] In some embodiments, the bottom wall of the main rib 191 is recessed in a direction away from the battery cell 20 to form a sinking portion 15, and the sinking portion 15 forms a groove 16 connected to the accommodating cavity 13, and the bottom wall of the groove 16 is provided with an installation hole 17 for installing the balancing valve 14.

[0114] Specifically, the bottom wall of the box body 10 is recessed in a direction away from the battery cell 20 to form a sinking portion 15, that is, the bottom wall of the box body 10 is recessed downward to form the sinking portion 15, and the interior of the sinking portion 15 is recessed compared to the bottom wall of the box body 10 to form a groove 16 connected to the accommodating cavity 13, and the sinking portion 15 is convex compared to the outer surface of the bottom wall of the box body 10.

[0115] Furthermore, a mounting hole 17 is formed in the bottom wall of the groove 16, and the balancing valve 14 is disposed in the mounting hole 17. Thus, the balancing valve 14 is sunken relative to the bottom wall of the housing 10, which allows the balancing valve 14 to be better accommodated in the groove 16 and reduces the probability of the balancing valve 14 interfering with the battery cells 20 in the height direction of the housing 10.

[0116] In addition, the provision of the groove 16 can also provide a larger accommodation space for the gas, so that the gas can be better collected in the groove 16 and smoothly discharged to the outside of the box body 10 through the balancing valve 14.

[0117] Thus, through the above structure, the gas in the housing 10 can be more smoothly collected in the groove 16 and then smoothly discharged out of the housing 10 through the balancing valve 14. At the same time, the balancing valve 14 is set lower than the bottom wall of the housing 10, which can better accommodate the balancing valve 14 in the groove 16 and reduce the probability of the balancing valve 14 interfering with the battery cells 20 in the height direction of the housing 10.

[0118] In some embodiments, the sinking portion 15 is centrally located on the bottom wall of the box body 10 .

[0119] Specifically, the central arrangement of the sinking portion 15 means that the sinking portion 15 is located in the middle area of ​​the bottom wall, that is, the groove 16 and the balancing valve 14 are located in the middle area of ​​the bottom wall.

[0120] In this way, the distances between each explosion-proof valve 24 and the exhaust holes 34 and the balancing valve 14 are shorter and more uniform, so that the gas can be collected into the groove 16 more quickly and smoothly from each exhaust hole 34 and finally discharged from the box 10 smoothly through the balancing valve 14.

[0121] In some embodiments, a thermally conductive structural adhesive is filled between the bottom wall of each battery cell 20 and the heat exchange element 30 for adhesive connection.

[0122] Specifically, the thermally conductive structural adhesive can not only connect and fix the bottom wall of the battery cell 20 and the heat exchange element 30 , but also improve the thermal conductivity of the battery cell 20 .

[0123] Please see again Figure 6 In some embodiments, the battery device 100 further includes a plurality of rubber barriers 40 disposed between the bottom wall of each battery cell 20 and the heat exchange element 30 . Each rubber barrier 40 extends along the second direction b. Two rubber barriers 40 form a group, and each group of rubber barriers 40 is spaced apart along the first direction a at opposite ends of a corresponding row of explosion-proof valves 24 .

[0124] Specifically, in the height direction of the battery cell 20 , each rubber barrier strip 40 is connected between the bottom wall of the battery cell 20 and the heat exchange element 30 .

[0125] Furthermore, each rubber blocking strip 40 is extended along the second direction b, and every two rubber blocking strips 40 form a group. Each group of rubber blocking strips 40 is arranged at opposite ends of a corresponding row of explosion-proof valves 24 along the first direction a.

[0126] In this way, the two rubber strips 40 in each group can isolate the explosion-proof valve 24 between the two, reduce the probability of the thermal conductive structural adhesive between the battery cell 20 and the heat exchange component 30 overflowing to the exhaust hole 34, and improve the sealing reliability between the battery cell 20 and the heat exchange component 30.

[0127] In some embodiments, expansion glue is filled between the bottom wall of the box body 10 and the heat exchange area 31 .

[0128] Specifically, expansion glue is filled between the bottom wall of the housing 10 and the heat exchange area 31 of the heat exchange element 30. Initially, the expansion glue is soft and can effectively absorb contour tolerances, providing sufficient expansion space for the battery cells 20. Furthermore, after hardening, the expansion glue ensures a stable connection between the heat exchange element 30 and the housing 10, while also providing excellent sealing performance.

[0129] In some embodiments, the battery cell 20 further includes a top wall (not shown in the figures) disposed opposite to the bottom wall, and an electrode terminal is disposed on the top wall.

[0130] Specifically, the top wall and bottom wall are arranged opposite each other and parallel to each other. In other words, the top wall is configured as the top cover 21 of the battery cell 20. Electrode terminals are protruding from the top cover 21, which are used to electrically connect to external structures to enable the input and output of power from the battery cell 20.

[0131] Thus, the electrode terminals are formed on the top wall, and the explosion-proof valve 24 is provided on the bottom wall of the battery cell 20 , so that the contact area between the bottom wall and the heat exchange element 30 is larger, thereby improving the heat exchange efficiency.

[0132] Please see again Figure 7 In some embodiments, the heat exchange channel 33 includes a main channel 331 and at least two branch channels 332 . The branch channels 332 are connected in parallel to each other and are connected between the main channel 331 and the outlet 333 and / or inlet 334 of the heat exchange channel 33 .

[0133] Specifically, the number of branch channels 332 can be two, or three or more, and all branch channels 332 are connected in parallel. That is, one end of all branch channels 332 is connected to the main channel 331, and the other end is connected to the outlet 333 or the inlet 334 of the heat exchange channel 33.

[0134] In this manner, the heat exchange medium in the heat exchange channel 33 first enters the branch channels 332 from the inlet 334 and then flows from each branch channel 332 into the main channel 331. The heat exchange medium flows in the main channel 331 and exchanges heat with the battery cells 20. After the heat exchange is completed, the heat exchange medium flows from the main channel 331 into the branch channels 332 and then from each main channel 331 into the outlet 333, where it flows out.

[0135] Through the above structure, the heat exchange medium can be dispersed in each branch channel 332, which can better balance the flow resistance of the heat exchange medium in the heat exchange element 30.

[0136] Based on the same concept as the above-mentioned battery device 100 , the present application further provides an electrical device, including the above-mentioned battery device 100 .

[0137] like Figure 8As shown, in some embodiments, the electrical device includes a vehicle. The vehicle body has a bottom plate 400 with an opening 500 defined therein. The bottom wall of the housing 10 is recessed away from the battery cell 20 to form a sunken portion 15. The sunken portion 15 forms a groove 16 that communicates with the accommodating cavity 13. A balancing valve 14 is disposed on the bottom wall of the groove 16. At least a portion of the sunken portion 15 is disposed within the opening 500, allowing the balancing valve 14 to communicate with the accommodating cavity 13 and the environment outside the vehicle body.

[0138] Specifically, the electric device may include a vehicle. The vehicle generally includes a vehicle body, and the vehicle body has a bottom plate 400. When the vehicle is in use, the bottom plate 400 is generally disposed toward the ground.

[0139] An opening 500 is formed in the bottom plate 400. When the battery device 100 is installed in the vehicle body, the bottom wall of the box body 10 is supported on the bottom plate 400. The bottom wall of the box body 10 protrudes downward to form a sunken portion 15, which is equipped with a balancing valve 14. Thus, the placement of the sunken portion 15 in the opening 500 allows the balancing valve 14 to directly discharge the gas in the accommodating chamber 13 through the opening 500 to the outside of the vehicle body, effectively reducing the impact of the gas on the passenger compartment.

[0140] Thus, through the above structure, the gas in the battery device 100 can be directly discharged outside the vehicle body through the balancing valve 14, so that the gas can be kept away from the passenger compartment of the vehicle, thereby improving the performance of the battery device 100.

[0141] In some embodiments, the electrical device further includes a seal 600 , which is disposed around the outer periphery of the sinking portion 15 and is sealed between the sinking portion 15 and the bottom plate 400 .

[0142] Specifically, the sealing member 600 may be configured as a sealing ring, surrounding the outer circumference of the sinking portion 15 , and sealingly disposed between the sinking portion 15 and the bottom plate 400 .

[0143] Thus, by providing the sealing member 600 , the sealing performance between the battery device 100 and the base plate 400 can be improved.

[0144] According to one or more embodiments, when the present application is used, the battery device 100 is first mounted on the vehicle body so that the battery device 100 is supported on the bottom plate 400 and the sinking portion 15 is disposed in the opening 500 of the bottom plate 400 .

[0145] When the battery device 100 is in use, the heat exchange element 30 and the bottom wall of the battery cell 20 are in contact with each other, thereby exchanging heat with the battery cell 20 .

[0146] When one or more battery cells 20 explode, gas flows from the explosion-proof valve 24 into the corresponding exhaust hole 34 and is discharged through the exhaust hole 34 into the exhaust passage between the heat exchange element 30 and the bottom wall of the housing 10. Furthermore, the gas, guided by the first and second ribs 18 and 19, converges into the groove 16 and is then discharged directly to the outside of the vehicle body through the balancing valve 14.

[0147] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery device, characterized in that: include: The box body has a receiving cavity inside; A battery cell is disposed in the accommodating cavity, and an explosion-proof valve is provided on the bottom wall of the battery cell; and A heat exchange component is arranged in the accommodating cavity and forms an exhaust channel between the heat exchange component and the bottom wall of the box body. The heat exchange component cooperates with the bottom wall of the battery cell for heat exchange. The heat exchange component includes a heat exchange area and an exhaust area. The heat exchange area has a heat exchange flow channel inside. The exhaust area is configured to connect the explosion-proof valve and the exhaust channel when the battery cell has thermal runaway.

2. The battery device according to claim 1, wherein: The exhaust area is provided with an exhaust hole communicating with the exhaust channel along the thickness direction of the heat exchange member, and the exhaust hole is provided corresponding to the explosion-proof valve.

3. The battery device according to claim 2, characterized in that The battery cells include a plurality of battery cells, all of which are arranged into a plurality of columns along a first direction and into a plurality of rows along a second direction intersecting the first direction; There are multiple exhaust holes, which are arranged in one-to-one correspondence with the explosion-proof valves.

4. The battery device according to claim 3, characterized in that The bottom wall of the box body is recessed in a direction away from the battery cell to form a plurality of first concave ribs, each of the first concave ribs extends along the second direction and is spaced apart along the first direction; A first exhaust sub-channel is formed between each of the first concave ribs and the heat exchange element, and each of the first concave ribs is correspondingly arranged to each of the explosion-proof valves on a row of the battery cells.

5. The battery device according to claim 4, characterized in that In the first direction, the width of each of the first concave ribs is not less than the width of the corresponding exhaust hole.

6. The battery device according to claim 4, characterized in that The bottom wall of the box body is recessed in a direction away from the battery cell to form a plurality of second ribs, each of the second ribs extending along the first direction and spaced apart along the second direction; A second exhaust sub-channel is formed between each of the second concave ribs and the heat exchange element, and each of the second exhaust sub-channels is connected to at least part of the first exhaust sub-channels to form the exhaust channel together.

7. The battery device according to claim 6, characterized in that All of the second concave ribs include one main concave rib and at least one secondary concave rib, and each of the secondary concave ribs is arranged on opposite sides of the main concave rib along the second direction; Wherein, in the second direction, the width of the primary rib is greater than the width of all the secondary ribs.

8. The battery device according to claim 7, characterized in that A balancing valve is provided on the bottom wall of the box body. The balancing valve is communicated with the accommodating cavity and is used to balance the air pressure between the accommodating cavity and the external environment.

9. The battery device according to claim 8, characterized in that The bottom wall of the main concave rib is recessed in a direction away from the battery cell to form a sunken portion, the sunken portion forms a groove communicating with the accommodating cavity, and a mounting hole for mounting the balancing valve is provided on the bottom wall of the groove.

10. The battery device according to claim 9, characterized in that The sinking portion is centrally arranged on the bottom wall of the box body.

11. The battery device according to claim 3, wherein: A heat-conducting structural adhesive is filled between the bottom wall of each battery cell and the heat exchange component for adhesive connection.

12. The battery device according to claim 11, wherein: The battery device further includes a plurality of rubber blocking strips disposed between the bottom wall of each battery cell and the heat exchange element, each of the rubber blocking strips extending along the second direction; Wherein, every two of the rubber blocking strips form a group, and each group of the rubber blocking strips is arranged at intervals along the first direction at opposite ends of a corresponding column of the explosion-proof valves.

13. The battery device according to claim 3, characterized in that Expansion glue is filled between the bottom wall of the box and the heat exchange area.

14. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 13.

15. The electrical equipment according to claim 14, characterized in that: The electrical equipment includes a vehicle, the vehicle body having a bottom plate with an opening; the bottom wall of the box body is recessed in a direction away from the battery cell to form a sunken portion, the sunken portion forming a groove communicating with the accommodating cavity, and a balancing valve is provided on the bottom wall of the groove; Wherein, at least a portion of the sunken portion is disposed in the opening, so that the balancing valve communicates with the accommodating cavity and the external environment of the vehicle body.

16. The electrical equipment according to claim 15, characterized in that: The electrical equipment further includes a sealing member, which is arranged around the outer periphery of the sinking portion and is sealed between the sinking portion and the bottom plate.

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