Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, the battery device comprises a box body, the box body is provided with a containing cavity, the box body comprises a middle beam and a frame beam surrounding the containing cavity, a first exhaust channel communicated with the containing cavity is formed in the frame beam, and the middle beam is arranged on the inner side of the frame beam and connected with the frame beam; the frame beam and the middle beam divide the containing cavity into a plurality of containing subareas, a second exhaust channel is formed in the middle beam, the containing subareas communicate with the second exhaust channel, and the second exhaust channel further communicates with the first exhaust channel; the plurality of single batteries are arranged in the accommodating cavity; and the pressure relief mechanism is arranged on the frame beam and communicates with the first exhaust channel. According to the battery device, the backflow and retention probability of high-temperature gas can be effectively reduced, the battery device has good operation stability and reliability, meanwhile, a flue structure does not need to be independently arranged in the accommodating cavity, more battery monomers can be accommodated in the accommodating cavity, and the overall 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 an electrical device. Background Art

[0002] The battery device includes a box body and a plurality of battery cells arranged in the box body. The battery device can be used as a power battery for new energy vehicles to provide power for the power system of the new energy vehicles.

[0003] In the prior art, a battery device is equipped with an explosion-proof valve at the bottom of the housing and a flue inside. When a battery cell within the housing experiences thermal runaway, the high-temperature gases generated by the cell are discharged through the flue to the explosion-proof valve at the bottom of the housing, and then discharged from the valve. However, in this battery device structure, the internal flue increases the overall gravity and structural complexity of the battery device, reducing the energy density of the battery device. Furthermore, the high-temperature gases in the flue near the explosion-proof valve are prone to backflow and stagnation, resulting in poor exhaust efficiency. Utility Model Content

[0004] The present application aims to solve the problems of poor exhaust effect caused by the complex thermal runaway exhaust structure of the current battery device and low energy density of the battery device. To this end, the present application provides a battery device and an electrical device.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] A box body having a accommodating cavity, the box body including a middle beam and a frame beam surrounding the accommodating cavity, a first exhaust channel communicating with the accommodating cavity being formed inside the frame beam, the middle beam being arranged inside the frame beam and connected to the frame beam, the frame beam and the middle beam dividing the accommodating cavity into a plurality of accommodating partitions, a second exhaust channel being formed inside the middle beam, the plurality of accommodating partitions being communicated with the second exhaust channel, and the second exhaust channel being also communicated with the first exhaust channel; a plurality of battery cells are all arranged in the accommodating cavity;

[0007] The pressure relief mechanism is provided on the frame beam and is in communication with the first exhaust channel.

[0008] The battery device according to the first aspect of the present application has at least the following beneficial effects:

[0009] The battery device of the present application forms a first exhaust channel connected to the accommodating cavity inside the frame beam of the box body, and sets a pressure relief mechanism on the frame beam, and makes the pressure relief mechanism connected to the first exhaust channel. The high-temperature gas generated by the battery monomer in the accommodating cavity due to thermal runaway can directly flow into the first exhaust channel, and then the first exhaust channel is guided to the pressure relief mechanism, and finally discharged through the pressure relief mechanism. In the above structure, the first exhaust channel and the pressure relief mechanism for exhaust are integrated on the frame beam. The high-temperature gas at various places in the accommodating cavity can flow to the pressure relief mechanism on the frame beam through the first exhaust channel. The position of the pressure relief mechanism on the frame beam is higher than the bottom of the accommodating cavity, which can effectively reduce the probability of high-temperature gas backflow and retention, improve the exhaust effect, and make the battery device have good operating stability and reliability. At the same time, there is no need to set a flue structure separately inside the accommodating cavity, so that more battery monomers can be placed in the accommodating cavity, thereby improving the overall energy density of the battery device.

[0010] In some embodiments, the frame beam includes a frame beam body and a limiting beam, the limiting beam is arranged on a side of the frame beam body close to the accommodating cavity, and the first exhaust channel is formed inside the frame beam body and / or the limiting beam.

[0011] With this arrangement, the limiting beam, the frame beam body, the first exhaust channel and the pressure relief mechanism are integrated into one, and the displacement of the battery cell in the accommodating cavity is limited by the limiting beam. At the same time, the overall structure of the box body is made more compact, the utilization rate of the internal space of the box body is improved, and the overall energy density of the battery device is correspondingly improved. In addition, the first exhaust channel in the limiting beam and / or the frame beam body cooperates with the pressure relief mechanism to discharge the high-temperature gas in the accommodating cavity in a timely manner, so that the battery device has good operating stability and reliability.

[0012] In some embodiments, the frame beam further includes a first reinforcement strip, which is disposed in the first exhaust channel and divides the first exhaust channel into a plurality of interconnected first sub-air channels, at least one of which is connected to the pressure relief mechanism.

[0013] In this way, the first reinforcement strip divides the first exhaust channel into multiple interconnected first sub-air channels, thereby improving the exhaust efficiency of the high-temperature gas in the accommodating cavity. At the same time, the first reinforcement strip serves as a reinforcement rib structure of the limiting beam and / or the frame beam body, thereby improving the overall structural strength of the frame beam and correspondingly improving the structural strength of the box body.

[0014] In some embodiments, the first reinforcement bar and the frame beam body are constructed as an integrally formed structure; and / or the first reinforcement bar and the limiting beam are constructed as an integrally formed structure.

[0015] Such an arrangement can simplify the manufacturing process and processing error of the frame beam, and further improve the overall structural strength of the frame beam.

[0016] In some embodiments, the middle beam includes a middle beam body and a second reinforcement strip, the second reinforcement strip is arranged in the second exhaust channel and divides the second exhaust channel into a plurality of second sub-air channels that are interconnected, and at least one of the second sub-air channels is connected to the pressure relief mechanism.

[0017] With such an arrangement, on the one hand, the second reinforcement strip divides the second exhaust channel into a plurality of second sub-air channels interconnected with each other, thereby improving the exhaust efficiency of the high-temperature gas in the accommodating cavity. At the same time, the second reinforcement strip serves as a reinforcement rib structure of the middle beam body, thereby improving the overall structural strength of the middle beam and correspondingly improving the structural strength of the box body.

[0018] In some embodiments, the second reinforcement bar and the middle beam body are constructed as an integrally formed structure.

[0019] Such an arrangement can simplify the manufacturing process and processing error of the middle beam, and further improve the overall structural strength of the middle beam.

[0020] In some embodiments, the box body further includes a bottom plate assembly, the bottom plate assembly and the frame beam together surround and form the accommodating cavity, and the plurality of battery cells are fixed to the bottom plate assembly.

[0021] With this arrangement, the bottom plate assembly constitutes the main supporting framework of the box, providing a firm and rigid support for the battery cells, and cooperates with the frame beams to give the box good structural stability.

[0022] In some embodiments, the bottom plate assembly includes a supporting bottom plate and a bottom guard plate, a storage cavity is formed between the supporting bottom plate and the bottom guard plate, a plurality of exhaust holes are provided on the supporting bottom plate, the exhaust end of the battery cell faces the corresponding exhaust hole and is connected to the storage cavity through the exhaust hole, and the storage cavity is also connected to the first exhaust channel.

[0023] This arrangement allows the storage chamber between the support base and the bottom guard plate to temporarily store high-temperature gas, reducing its flow rate. Furthermore, the bottom guard plate prevents the high-temperature gas from directly impacting the remaining structures within the chamber. The exhaust port of each battery cell can release pressure into the storage chamber through its corresponding vent, reducing the likelihood of high-temperature gas concentration and backflow, and improving exhaust efficiency.

[0024] In some embodiments, the base plate assembly further includes a first thermal insulation sheet, which is disposed on the supporting base plate and covers the exhaust hole, and the first thermal insulation sheet is configured to break at a preset pressure or melt at a preset temperature.

[0025] With this arrangement, relying on the structural characteristics of the first thermal insulation sheet being able to break at a preset pressure or melt at a preset temperature, the high-temperature gas generated by the thermally runaway battery cell can break through the first thermal insulation sheet and conduct to the exhaust hole, completing the pressure release in a shorter path without affecting the normal operation of the remaining battery cells, thereby improving the overall operational reliability of the battery device.

[0026] In some embodiments, the base plate assembly further includes an insulating plate, which is disposed on a side of the supporting base plate away from the bottom guard plate, and a plurality of rubber retaining rings are formed on the insulating plate, and the rubber retaining rings correspondingly surround the exhaust holes.

[0027] With this arrangement, the glue retaining ring on the insulating plate can prevent the structural glue between the battery cell and the supporting base plate from overflowing to the exhaust hole, and prevent the structural glue from contacting the exhaust end of the battery cell, so that the exhaust end of the battery cell can be exhausted smoothly. At the same time, the insulating plate as a whole provides insulation protection for the battery cell.

[0028] In some embodiments, the base plate assembly also includes a second thermal insulation sheet, which is arranged on the side of the bottom guard plate close to the supporting base plate, and the vertical projection of all the exhaust holes relative to the bottom guard plate is located within the vertical projection of the second thermal insulation sheet relative to the bottom guard plate.

[0029] With this arrangement, when a battery cell experiences thermal runaway, the high-temperature gas ejected from its exhaust end will first impact the second thermal insulation plate on the bottom guard plate. The second thermal insulation plate provides buffering protection for the bottom guard plate, reducing the probability of the bottom guard plate being damaged by the impact of the high-temperature gas, and also reducing the risk of the bottom guard plate catching fire.

[0030] In a second aspect, the present application provides an electrical device, which includes a battery device as described in any one of the above items, and the battery device is used to provide electrical energy.

[0031] The electrical equipment according to the second aspect of the present application has at least the following beneficial effects:

[0032] The electrical equipment of the present application has good stability and reliability in use because it is equipped with the above-mentioned battery device.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0035] Figure 1 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0036] Figure 2 This is another structural schematic diagram of a vehicle according to an embodiment of the present application.

[0037] Figure 3 This is an exploded view of the structure of the battery device according to an embodiment of the present application.

[0038] Figure 4 Schematic diagram of the structure of a battery device according to an embodiment of the present application.

[0039] Figure 5 This is a partial structural diagram of the box body of an embodiment of the present application.

[0040] Figure 6 This is a schematic diagram of the top view of the box body of an embodiment of the present application.

[0041] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at AA.

[0042] Figure 8 for Figure 7 A partial enlarged view of point C in the middle.

[0043] Figure 9 for Figure 7 A partial enlarged view of point D in the middle.

[0044] Figure 10 for Figure 6 Corresponding partial structural decomposition diagram.

[0045] Figure 11 for Figure 6 Schematic diagram of the cross-sectional structure at BB.

[0046] Figure 12 for Figure 11 A partial enlarged view of point E in the middle.

[0047] Explanation of the accompanying drawings: battery device 10; vehicle 20; controller 30; motor 40; box 100; accommodating chamber 110; accommodating partition R; side frame beam 120; first exhaust channel 121; first sub-air channel 1211; side frame beam body 122; first reinforcing strip 123; limiting beam 124; middle beam 130; second exhaust channel 131; second sub-air channel 1311; middle beam body 132; second reinforcing strip 133; bottom plate assembly 140; supporting bottom plate 141; bottom guard plate 142; storage chamber 143; exhaust hole 144; first thermal insulation sheet 145; insulating plate 146; rubber retaining ring 147; second thermal insulation sheet 148; cover plate 150; battery cell 200; pressure relief mechanism 300; length direction X; width direction Y; height direction Z. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Currently, market developments indicate that batteries are increasingly being used. 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 like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0055] A battery is composed of one or more battery cells. For each battery, the battery cells can be connected in series, in parallel, or in a hybrid connection. Hybrid connection means that the battery cells are connected in both series and parallel.

[0056] A battery cell is the smallest unit of a battery. Its structure includes a housing, electrolyte, and electrode assemblies. The electrode assembly is the component where the electrochemical reaction occurs in the battery cell and includes a positive electrode sheet, a negative electrode sheet, and a separator. The housing may contain one or more electrode assemblies, which are primarily formed by winding or stacking positive and negative electrode sheets, with a separator typically placed between the positive and negative electrodes.

[0057] The shell is a structure with one end open and an interior hollow. The electrode assembly is arranged inside the shell, and the end cover is arranged at the opening of the shell. The internal environment of the battery cell is formed by covering the opening with the end cover. Of course, the end cover and the shell can also be integrated. Specifically, the end cover and the shell can form a common connection surface before other components are put into the shell. When the interior of the shell needs to be encapsulated, the end cover is covered with the shell. The shell can be of various shapes and sizes, such as rectangular, cylindrical, hexagonal, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the electrode assembly. The material of the shell can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0058] In the prior art, a battery device is equipped with an explosion-proof valve at the bottom of the housing and a flue inside. When a battery cell within the housing experiences thermal runaway, the high-temperature gases generated by the cell are discharged through the flue to the explosion-proof valve at the bottom of the housing, and then discharged from the valve. However, in this battery device structure, the internal flue increases the overall gravity and structural complexity of the battery device, reducing the energy density of the battery device. Furthermore, the high-temperature gases in the flue near the explosion-proof valve are prone to backflow and stagnation, resulting in poor exhaust efficiency.

[0059] Based on the above situation, in order to solve the problem of poor exhaust effect caused by the complex exhaust structure of the thermal runaway of the current battery device and low energy density of the battery device, one or more embodiments of the present application provide a battery device 10, which forms a first exhaust channel connected to the accommodating cavity inside the frame beam of the box body and sets a pressure relief mechanism on the frame beam, and connects the pressure relief mechanism to the first exhaust channel. The high-temperature gas generated by the battery cells in the accommodating cavity due to thermal runaway can directly flow into the first exhaust channel, and then the first exhaust channel is guided to the pressure relief mechanism, and finally discharged through the pressure relief mechanism. In the above structure, the first exhaust channel and the pressure relief mechanism for exhaust are integrated on the frame beam, and the high-temperature gas at various places in the accommodating cavity can flow to the pressure relief mechanism on the frame beam through the first exhaust channel. The position of the pressure relief mechanism on the frame beam is higher than the bottom of the accommodating cavity, which can effectively reduce the probability of high-temperature gas backflow and retention, improve the exhaust effect, and make the battery device have good operating stability and reliability. At the same time, there is no need to set a flue structure separately inside the accommodating cavity, so that more battery cells can be placed in the accommodating cavity, thereby improving the overall energy density of the battery device.

[0060] In the embodiments of the present application, the battery device can be used in electrical devices that use the battery device as a power source, or various energy storage systems that use the battery device as an energy storage element. The electrical devices may include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0061] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. Figure 2 This is another structural schematic diagram of a vehicle according to an embodiment of the present application. The vehicle 20 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 10 is provided inside the vehicle 20. The battery device 10 may be provided at the bottom, head or tail of the vehicle 20. The battery device 10 may be used to power the vehicle 20. For example, the battery device 10 may serve as an operating power source for the vehicle 20. The vehicle 20 may further include a controller 30 and a motor 40. The controller 30 is used to control the battery device 10 to power the motor 40, for example, to meet the power requirements for starting, navigating and driving the vehicle 20.

[0062] Of course, in other embodiments, the battery device 10 can serve not only as an operating power source for the vehicle 20 , but also as a driving power source for the vehicle 20 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 20 .

[0063] See also Figure 3 The battery device 10 mentioned in this application may include a battery module or a battery pack, etc., and the battery cell 200 may constitute the smallest unit of the battery device 10.

[0064] See also Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 An embodiment of the present application provides a battery device 10 , which includes a box 100 , a pressure relief mechanism 300 , and a plurality of battery cells 200 .

[0065] The housing 100 has a receiving chamber 110 and includes a frame beam 120 surrounding the receiving chamber 110. The frame beam 120 defines a first exhaust passage 121 in communication with the receiving chamber 110. Multiple battery cells 200 are disposed within the receiving chamber 110. A pressure relief mechanism 300 is disposed within the frame beam 120 and communicates with the first exhaust passage 121.

[0066] It should be noted that, in this application, the housing 500 refers to a structure that houses and mechanically supports multiple battery cells 100. The housing 100 of the battery device 10 may also integrate a BMS (Battery Management System), a thermal management system, etc. All battery cells 200 are arranged in a predetermined direction within the housing 100, such as in an array or in a single row or column.

[0067] In this application, the frame beam 120 of the housing 100 refers to the peripheral structure of the housing 100. It is the skeleton structure of the housing 100 and surrounds the accommodating cavity 110. The frame beam 120 is annular in shape, such as rectangular or cylindrical. The frame beam 120 can be made of high-strength metal or composite materials, taking into account both lightweight and rigid requirements. When the battery device 10 is hit from the side, the frame beam 120 protects the battery cells 200 in the accommodating cavity 110 by deforming to absorb energy or by providing rigid resistance.

[0068] The first exhaust channel 121 formed inside the frame beam 120 and connected to the accommodating cavity 110 can be understood as follows: the frame beam 120 is hollow inside, forming an annular channel surrounding the accommodating cavity 110, and the annular channel is the first exhaust channel 121. One or more first air inlets (not shown in the figure) are opened on the outer wall of the frame beam 120 to connect the first exhaust channel 121 with the accommodating cavity 110, or the outer wall of the frame beam 120 directly forms an air intake gap surrounding the accommodating cavity 110, and the first exhaust channel 121 is connected to the accommodating cavity 110 through the air intake gap, so that the gas at various places in the accommodating cavity 110 can flow into the first exhaust channel 121 through the corresponding position of the air intake gap.

[0069] When the box body 100 is a rectangular body, the frame beam 120 includes two parallel and spaced-apart side beams and two parallel and spaced-apart side beams, the side beams being connected between the two side beams, the side beams extending along the length direction X of the accommodating cavity 110, and the side beams extending along the width direction Y of the accommodating cavity 110. The interior of the side beams and the interior of the side beams both form corresponding first exhaust channels 121, and the first exhaust channels 121 inside the side beams are connected to the first exhaust channels 121 inside the side beams, thereby forming an overall annular first exhaust channel 121. Multiple pressure relief mechanisms 300 can be respectively arranged at the ends of the side beams or the side beams, that is, at the corners of the frame beam 120, to facilitate the discharge of high-temperature gas in the first exhaust channel 121.

[0070] In the present application, the pressure relief mechanism 300 can be configured as an explosion-proof valve, which is installed on the outer wall of the frame beam 120 and communicates with the first exhaust channel 121 inside the frame beam 120. Multiple pressure relief mechanisms 300 can be provided, and the multiple pressure relief mechanisms 300 are spaced apart along the extension trajectory of the frame beam 120, so that the gas entering the first exhaust channel 121 from the accommodating cavity 110 can be discharged through the nearest pressure relief mechanism 300.

[0071] The pressure relief principle of the pressure relief mechanism 300 is: when a single or multiple battery cells 200 in the accommodating cavity 110 generate high-temperature gas due to faults such as overheating, short circuit, overcharging, etc., the high-temperature gas flows into the first exhaust channel 121 inside the frame beam 120 through the accommodating cavity 110, and is introduced into the pressure relief mechanism 300 through the first exhaust channel 121. The pressure relief mechanism 300 releases the high-temperature gas and pressure through controllable pressure relief, so that the battery device 10 can operate reliably and stably.

[0072] The battery device 10 of the embodiment of the present application forms a first exhaust channel 121 connected to the accommodating cavity 110 inside the side frame beam 120 of the box body 100, and sets a pressure relief mechanism 300 in the side frame beam 120, and makes the pressure relief mechanism 300 connected to the first exhaust channel 121. The high-temperature gas generated by the battery cell 200 in the accommodating cavity 110 due to thermal runaway can directly flow into the first exhaust channel 121, and then guide the first exhaust channel 121 to the pressure relief mechanism 300, and finally be discharged through the pressure relief mechanism 300. In the above structure, the first exhaust channel 121 for exhaust and the pressure relief mechanism 300 are integrated on the frame beam 120, and the high-temperature gas at each location in the accommodating cavity 110 can flow to the pressure relief mechanism 300 on the frame beam 120 through the first exhaust channel 121. The position of the pressure relief mechanism 300 on the frame beam 120 is higher than the bottom of the accommodating cavity 110, which can effectively reduce the probability of high-temperature gas backflow and retention, improve the exhaust effect, and make the battery device 10 have good operating stability and reliability. At the same time, there is no need to set a separate flue structure inside the accommodating cavity 110, so that more battery cells 200 can be placed in the accommodating cavity 110, thereby improving the overall energy density of the battery device 10.

[0073] In some embodiments of this application, see Figure 6 、 Figure 7 and Figure 8 The frame beam 120 includes a frame beam body 122 and a limiting beam 124 . The limiting beam 124 is arranged on one side of the frame beam body 122 close to the accommodating cavity 110 . A first exhaust channel 121 is formed inside the frame beam body 122 and / or the limiting beam 124 .

[0074] Specifically, see Figure 8 The frame beam body 122 is constructed as a hollow beam structure with a rectangular or circular cross section, and a first exhaust channel 121 is formed inside the frame beam body. Similarly, the limiting beam 124 can also be constructed as a hollow beam structure with a rectangular or circular cross section, and a first exhaust channel 121 is formed inside the frame beam body 122. It should be noted that the two opposite sides of the frame beam body 122 along its own thickness direction are the inner side and the outer side respectively. The side of the frame beam body 122 close to the accommodating cavity 110 corresponds to the inner side of the frame beam body 122, and the side of the frame beam body 122 away from the accommodating cavity 110 corresponds to the outer side of the frame beam body 122.

[0075] The limiting beam 124 is attached to the side of the frame beam body 122 near the accommodating cavity 110, and the extension trajectory of the limiting beam 124 is consistent with the extension trajectory of the frame beam body 122, both of which are ring-shaped and surround the accommodating cavity 110. The limiting beam 124 and the frame beam body 122 are constructed as an integrally formed structure, and can be formed into an integral structure through a die-casting process or an extrusion process to improve the overall structural strength of the frame beam 120.

[0076] The limiting beams 124 are used to limit and stop the battery cells 200 within the accommodating cavity 110, preventing the battery cells 200 from moving along the length direction X or width direction Y of the accommodating cavity 110. This ensures that the battery cells 200 remain stable during the transfer, transportation, and operation of the battery device 10. Furthermore, the limiting beams 124 can disperse the expansion force and mechanical impact force of the battery cells 200 within the accommodating cavity 110, thereby reducing the direct impact of the battery cells 200 on the frame beam body 122.

[0077] A first exhaust channel 121 is formed inside the limiting beam 124 and the frame beam body 122, and the first exhaust channel 121 in the limiting beam 124 is connected to the first exhaust channel 121 in the frame beam body 122. The pressure relief mechanism 300 is arranged on the frame beam body 122, so that the high-temperature gas in the accommodating cavity 110 flows to the pressure relief mechanism 300 through the corresponding first exhaust channel 121.

[0078] In the above structure, the limiting beam 124, the frame beam body 122, the first exhaust channel 121 and the pressure relief mechanism 300 are integrated into one. The limiting beam 124 is used to limit the displacement of the battery cell 200 in the accommodating cavity 110. At the same time, the overall structure of the box body 100 is made more compact, the internal space utilization of the box body 100 is improved, and the overall energy density of the battery device 10 is correspondingly improved. In addition, the limiting beam 124 and / or the first exhaust channel 121 in the frame beam body 122 cooperates with the pressure relief mechanism 300 to discharge the high-temperature gas in the accommodating cavity 110 in time, so that the battery device 10 has good operating stability and reliability.

[0079] In some embodiments of this application, see Figure 6 、 Figure 7 and Figure 8 The frame beam 120 also includes a first reinforcement strip 123 , which is arranged in the first exhaust channel 121 and divides the first exhaust channel 121 into a plurality of interconnected first sub-air channels 1211 , at least one of which is connected to the pressure relief mechanism 300 .

[0080] Specifically, see Figure 8The frame beam body 122 is constructed as a hollow beam structure with a rectangular or circular cross-section, forming a first exhaust channel 121 therein. A plurality of first reinforcement bars 123 are provided, all of which are spaced apart within the first exhaust channel 121 along the height direction Z of the frame beam body 122. Adjacent first reinforcement bars 123 are arranged in parallel, thereby dividing the first exhaust channel 121 into a plurality of first sub-air channels 1211. Each first reinforcement bar 123 has a first connecting port (not shown) on a side adjacent to the adjacent first reinforcement bar 123, connecting two adjacent first sub-air channels 1211. A pressure relief mechanism 300 is provided at an end or corner of the frame beam body 122 and is connected to all first sub-air channels 1211.

[0081] At least one of the first sub-air channels 1211 is connected to the accommodating chamber 110. For example, in one embodiment, along the height direction Z of the frame beam body 122, the first sub-air channel 1211 at the bottom is connected to the accommodating chamber 110, and the high-temperature gas generated in the accommodating chamber 110 due to thermal runaway of the battery cell 200 can first enter the first sub-air channel 1211 at the bottom. Since the high-temperature gas is a relatively high-temperature gas, it will continue to diffuse upward to the remaining first sub-air channels 1211, and finally be introduced into the pressure relief mechanism 300 along the first sub-air channel 1211 for discharge. In this way, the high-temperature gas in the accommodating chamber 110 can be diffused and discharged through multiple first sub-air channels 1211, reducing the risk of high-temperature gas concentration and improving the exhaust effect.

[0082] For example, in another embodiment, each first sub-air channel 1211 is provided with a plurality of second connecting ports (not shown in the figure) on one side close to the accommodating chamber 110, and the plurality of second connecting ports are spaced apart along the extension trajectory of the accommodating chamber 110. The high-temperature gas in the accommodating chamber 110 can enter the corresponding first sub-air channel 1211 through the second connecting port nearby, and then be introduced into the pressure relief mechanism 300 along the corresponding first sub-air channel 1211 for discharge. In this way, the high-temperature gas at different positions in the accommodating chamber 110 can be more comprehensively diffused and discharged through each first sub-air channel 1211, thereby reducing the risk of high-temperature gas concentration and improving the exhaust effect.

[0083] Of course, in other embodiments, all the first reinforcement strips 123 are arranged in the first exhaust channel 121 at intervals along the extension trajectory of the frame beam body 122, the first reinforcement strips 123 are perpendicular to the first exhaust channel 121, and a third connecting port (not shown in the figure) is opened in the middle of the first reinforcement strip 123, thereby dividing the first exhaust channel 121 into a plurality of interconnected first sub-air channels 1211, and the plurality of first sub-air channels 1211 are distributed at intervals along the extension trajectory of the frame beam body 122. At least one of all the first sub-air channels 1211 is connected to the accommodating cavity 110, and the pressure relief mechanism 300 is arranged at the end or corner of the frame beam body 122 and is connected to the corresponding first sub-air channel 1211. In this way, the high-temperature gas in the accommodating cavity 110 can also be diffused and discharged through the plurality of first sub-air channels 1211, thereby reducing the risk of high-temperature gas concentration and improving the exhaust effect.

[0084] When the first reinforcement strip 123 is disposed in the first exhaust channel 121 of the limiting beam 124 , its embodiment is consistent with the embodiment in which the first reinforcement strip 123 is disposed in the first exhaust channel 121 of the frame beam body 122 , and is not repeated here.

[0085] It can be understood that in the above structure, the first reinforcement strip 123 divides the first exhaust channel 121 into multiple interconnected first sub-air channels 1211, thereby improving the exhaust efficiency of the high-temperature gas in the accommodating cavity 110. At the same time, the first reinforcement strip 123 serves as a reinforcement rib structure of the limiting beam 124 and / or the frame beam body 122, thereby improving the overall structural strength of the frame beam 120 and correspondingly improving the structural strength of the box body 100.

[0086] Furthermore, the first reinforcement strip 123 and the frame beam body 122 are constructed as an integrally formed structure; and / or the first reinforcement strip 123 and the limiting beam 124 are constructed as an integrally formed structure.

[0087] Specifically, the first reinforcement strip 123 and the frame beam body 122 can be extruded as a whole, such as designing an extrusion die with an inner cavity, and causing metal to flow through the extrusion die under high temperature and high pressure to form an integrated structure of the first reinforcement strip 123 and the frame beam body 122.

[0088] Alternatively, a hollow frame beam body 122 is first processed, the first reinforcement strip 123 is then stamped out, and the first reinforcement strip 123 is then fixedly connected to the inside of the frame beam body 122 by welding, thereby forming an integrated structure of the first reinforcement strip 123 and the frame beam body 122.

[0089] By constructing the first reinforcing strip 123 and the frame beam body 122 into an integrally formed structure, the manufacturing process and processing error of the frame beam 120 can be simplified, and the overall structural strength of the frame beam 120 can be further improved.

[0090] The first reinforcing strip 123 and the limiting beam 124 are formed in the same manner and will not be described again here.

[0091] By constructing the first reinforcing bar 123 and the limiting beam 124 into an integrally formed structure, the manufacturing process and processing error of the frame beam 120 can also be simplified, and the overall structural strength of the frame beam 120 can be further improved.

[0092] In addition, in some embodiments, in the frame beam 120 structure, a plurality of first reinforcement strips 123 are spaced apart in the first exhaust channel 121 of the frame beam body 122, and the inner wall of the frame beam body 122 and the two adjacent first reinforcement strips 123 form a cavity structure with a triangular cross-section, which is the first sub-air channel 1211. In this way, the overall structural strength of the frame beam 120 is further improved.

[0093] Alternatively, in the frame beam 120 structure, see Figure 8 A plurality of first reinforcement strips 123 are arranged at intervals in the first exhaust channel 121 of the frame beam body 122. Among two adjacent first reinforcement strips 123, one first reinforcement strip 123 is inclined relative to the height direction of the frame beam body 122, and the other first reinforcement strip 123 is perpendicular to the height direction of the frame beam body 122. The inner wall of the frame beam body 122 and the two adjacent first reinforcement strips 123 constitute a cavity structure with a trapezoidal cross-section, which is the first sub-air channel 1211. In this way, the overall structural strength of the frame beam 120 can also be improved.

[0094] The matching structure of the limiting beam 124 and the first reinforcing bar 123 is similar and will not be described again here.

[0095] In some embodiments of this application, see Figure 5 、 Figure 6 、 Figure 7 and Figure 9 The box body 100 also includes a middle beam 130, which is arranged on the inner side of the frame beam 120 and connected to the frame beam 120. The frame beam 120 and the middle beam 130 divide the accommodating cavity 110 into multiple accommodating partitions R. A second exhaust channel 131 is formed inside the middle beam 130. The multiple accommodating partitions R are connected to the second exhaust channel 131, and the second exhaust channel 131 is also connected to the first exhaust channel 121.

[0096] Specifically, see Figure 6 and Figure 7The middle beam 130 has opposite ends connected to the frame beams 120, dividing the accommodating chamber 110 into four accommodating sections R. Each accommodating section R accommodates and installs multiple battery cells 200. The middle beam 130 is constructed as a hollow structure, forming a second exhaust channel 131 extending along the length direction X or width direction Y of the accommodating chamber 110. The outer wall of the middle beam 130 defines multiple second air inlets (not shown in the figure), connecting the second exhaust channel 131 with each accommodating section R.

[0097] In this way, the high-temperature gas generated by the thermal runaway of the battery cells 200 in each accommodating partition R can enter the second exhaust channel 131 or the first exhaust channel 121 nearby. The high-temperature gas entering the second exhaust channel 131 flows into the first exhaust channel 121, and finally flows to the pressure relief mechanism 300 for discharge. The high-temperature gas entering the first exhaust channel 121 flows directly to the pressure relief mechanism 300 for discharge.

[0098] Of course, a pressure relief mechanism 300 may also be provided at the joint between the first exhaust channel 121 and the second exhaust channel 131 so that the high-temperature gas in the second exhaust channel 131 can be quickly discharged through the pressure relief mechanism 300, thereby improving the exhaust efficiency.

[0099] The above structure, through the coordinated arrangement of the middle beam 130 and the frame beam 120, on the one hand, divides the accommodating cavity 110 into multiple accommodating partitions R, which is conducive to the management and monitoring of the operating status of each battery cell 200; on the other hand, the high-temperature gas generated by the battery cell 200 in each accommodating partition R due to thermal runaway can flow to the first exhaust channel 121 or the second exhaust channel 131 nearby, and then flow along the first exhaust channel 121 or the second exhaust channel 131 to the corresponding pressure relief mechanism 300. In this way, the prevention and control response efficiency of the battery device 10 in response to thermal runaway of the battery cell 200 can be improved, and the operating reliability and stability of the battery device 10 can be further improved.

[0100] Furthermore, the middle beam 130 includes a middle beam body 132 and a second reinforcement strip 133 . The second reinforcement strip 133 is arranged in the second exhaust channel 131 and divides the second exhaust channel 131 into a plurality of second sub-air channels 1311 that are interconnected. At least one second sub-air channel 1311 is connected to the pressure relief mechanism 300 .

[0101] Specifically, see Figure 7 and Figure 9The middle beam body 132 is a hollow beam structure with a rectangular or circular cross-section. A second exhaust channel 131 is formed within it. Multiple second reinforcement bars 133 are provided. All second reinforcement bars 133 are spaced apart within the second exhaust channel 131 along the height direction Z of the middle beam body 132. Adjacent second reinforcement bars 133 are arranged in parallel, thereby dividing the two exhaust channels 131 into multiple second sub-channels 1311. Each second reinforcement bar 133 has a fourth connecting port (not shown) on the side adjacent to the adjacent second reinforcement bar 133, connecting two adjacent second sub-channels 1311. Each first sub-channel 1211 on the first exhaust channel 121 is connected to the corresponding end of each second sub-channel 1311.

[0102] At least one of the second sub-gas channels 1311 is connected to the accommodating cavity 110. For example, in one embodiment, along the height direction Z of the intermediate beam body 132, the second sub-gas channel 1311 located at the bottom is connected to the accommodating partition R. High-temperature gas generated by thermal runaway of the battery cells 200 in the accommodating partition R can first enter the bottom-most second sub-gas channel 1311. Since the high-temperature gas is a relatively high-temperature gas, it will continue to diffuse upward to the remaining second sub-gas channels 1311, and ultimately be introduced into the first exhaust channel 121 through the second sub-gas channels 1311. Then, it will flow through the first exhaust channel 121 to the pressure relief mechanism 300 for discharge. In this way, the high-temperature gas in each accommodating partition R can diffuse through multiple second sub-gas channels 1311 and be guided to the first exhaust channel 121, thereby reducing the risk of high-temperature gas concentration and improving the exhaust effect.

[0103] For example, in another embodiment, each second sub-air channel 1311 is provided with a plurality of fifth connecting ports (not shown in the figure) on the side close to the accommodating partition R, and the plurality of second connecting ports are spaced apart along the extension trajectory of the middle beam body 132. The high-temperature gas in the accommodating partition R can enter the corresponding second sub-air channel 1311 through the fifth connecting port nearby, and then be introduced into the first exhaust channel 121 along the corresponding second sub-air channel 1311. In this way, the high-temperature gas at different positions in each accommodating partition R can be diffused and discharged more comprehensively through each second sub-air channel 1311, thereby reducing the risk of high-temperature gas concentration and improving the exhaust effect.

[0104] Of course, in other embodiments, all second reinforcement strips 133 are disposed at intervals within the second exhaust channel 131 along the extension of the middle beam body 132. The second reinforcement strips 133 are perpendicular to the second exhaust channel 131, and a sixth communication opening (not shown) is defined in the middle of the second reinforcement strip 133. This divides the second exhaust channel 131 into a plurality of interconnected second sub-channels 1311. The plurality of second sub-channels 1311 are spaced apart along the extension of the middle beam body 132. At least one of the second sub-channels 1311 is aligned with the accommodation section R. This allows the high-temperature gas within each accommodation section R to be diffused and discharged to the first exhaust channel 121 through the plurality of second sub-channels 1311, reducing the risk of high-temperature gas concentration and improving exhaust efficiency.

[0105] It can be understood that by setting the middle beam 130 as a matching structure of the middle beam body 132 and the second reinforcement strip 133, on the one hand, the second reinforcement strip 133 divides the second exhaust channel 131 into a plurality of interconnected second sub-air channels 1311, thereby improving the exhaust efficiency of the high-temperature gas in the accommodating cavity 110. At the same time, the second reinforcement strip 133 serves as a reinforcement rib structure of the middle beam body 132, thereby improving the overall structural strength of the middle beam 130 and correspondingly improving the structural strength of the box body 100.

[0106] Furthermore, the second reinforcement bar 133 and the middle beam body 132 are constructed as an integrally formed structure.

[0107] Specifically, the second reinforcement strip 133 and the middle beam body 132 can be extruded integrally, such as by designing an extrusion die with an inner cavity, and causing metal to flow through the extrusion die under high temperature and high pressure to form an integral structure of the second reinforcement strip 133 and the middle beam body 132 .

[0108] Alternatively, a hollow middle beam body 132 is first processed, the second reinforcement bar 133 is then stamped out, and the second reinforcement bar 133 is then fixedly connected to the inside of the middle beam body 132 by welding, thereby forming an integrated structure of the second reinforcement bar 133 and the middle beam body 132.

[0109] By constructing the second reinforcing bar 133 and the middle beam body 132 into an integrally formed structure, the manufacturing process and processing error of the middle beam 130 can be simplified, and the overall structural strength of the middle beam 130 can be further improved.

[0110] In addition, in some embodiments, in the structure of the middle beam 130, a plurality of second reinforcement strips 133 are arranged at intervals in the second exhaust channel 131, and the inner wall of the middle beam body 132 and the two adjacent second reinforcement strips 133 form a cavity structure with a triangular cross-section, which is the second sub-air channel 1311. In this way, the overall structural strength of the middle beam 130 is further improved.

[0111] Alternatively, in the structure of the middle beam 130, a plurality of second reinforcement strips 133 are arranged at intervals in the second exhaust channel 131. Among two adjacent second reinforcement strips 133, one second reinforcement strip 133 is inclined relative to the height direction of the middle beam body 132, and the other second reinforcement strip 133 is perpendicular to the height direction of the middle beam body 132. The inner wall of the middle beam body 132 and the two adjacent second reinforcement strips 133 constitute a cavity structure with a trapezoidal cross-section, which is the second sub-air channel 1311. In this way, the overall structural strength of the middle beam 130 can also be improved.

[0112] In some embodiments of this application, see Figure 5 and Figure 6 The box body 100 further includes a bottom plate assembly 140 , which together with the frame beam 120 surrounds and forms the accommodating cavity 110 , and a plurality of battery cells 200 are fixed to the bottom plate assembly 140 .

[0113] It should be noted that the bottom plate assembly 140 refers to a protective structure on the box body 100 for directly supporting multiple battery cells 200. The bottom plate assembly 140 can be welded with the frame beam 120 to form an integral structure, and the two surround and define a receiving cavity 110 with an opening. Figure 4 The box body 100 may further include a cover plate 150 , which is connected to the frame beam 120 and covers the opening of the accommodating cavity 110 to seal the accommodating cavity 110 .

[0114] Along the height Z of the housing 100, the floor assembly 140 comprises an outer floor, a middle floor, and an inner floor, forming a three-layer composite structure. The outer floor is used for mounting to the vehicle chassis, the middle floor serves as a heat shield or liquid cooling plate, and the inner floor directly contacts the battery cells 200, providing excellent structural strength. All battery cells 200 are secured to the floor assembly 140 with structural adhesive, ensuring a secure fit.

[0115] It is easy to understand that the bottom plate assembly 140 constitutes the main supporting skeleton of the box body 100, provides a stable rigid support for the battery cells 200, and cooperates with the frame beam 120 to give the box body 100 good structural stability.

[0116] Further, see Figure 5 、 Figure 10 、 Figure 11 and Figure 12The bottom plate assembly 140 includes a supporting bottom plate 141 and a bottom guard plate 142. A storage cavity 143 is formed between the supporting bottom plate 141 and the bottom guard plate 142. A plurality of exhaust holes 144 are provided on the supporting bottom plate 141. The exhaust end of the battery cell 200 (not shown in the figure) faces the corresponding exhaust hole 144 and is connected to the storage cavity 143 through the exhaust hole 144. The storage cavity 143 is also connected to the first exhaust channel 121.

[0117] Specifically, along the height direction Z of the housing 100, the bottom guard plate 142 is the outer bottom plate of the housing 100, which is used for assembly and connection with the vehicle chassis. The support bottom plate 141 is the inner bottom plate of the housing 100, which is used to directly support the battery cells 200. The support bottom plate 141 and the bottom guard plate 142 are stamped and then welded together to form a storage cavity 143 between them. The storage cavity 143 is the same shape and size as the accommodating cavity 110, and the two are coaxially distributed.

[0118] The arrangement of all exhaust holes 144 on the support base plate 141 is the same as the arrangement of all battery cells 200 within the accommodating chamber 110. The exhaust end of a battery cell 200 refers to the outlet end of the explosion-proof valve of the battery cell 200, and the exhaust end of each battery cell 200 faces the corresponding exhaust hole 144. A first exhaust channel 121 formed within the frame beam 120 surrounds and communicates with the storage chamber 143.

[0119] It is not difficult to understand that when the battery cell 200 experiences thermal runaway, the exhaust end of the battery cell 200 discharges the high-temperature gas into the storage chamber 143 through the corresponding exhaust hole 144, and then flows from the storage chamber 143 into the first exhaust channel 121, and finally flows through the first exhaust channel 121 to the pressure relief mechanism 300 for discharge.

[0120] The storage chamber 143 between the support base 141 and the bottom guard plate 142 temporarily stores high-temperature gas, reducing its flow rate. The bottom guard plate 142 also prevents the high-temperature gas from directly impacting the remaining structures within the accommodating chamber 110. The exhaust end of each battery cell 200 can release pressure into the storage chamber 143 through the corresponding exhaust hole 144, reducing the possibility of high-temperature gas concentration and backflow, and improving exhaust efficiency.

[0121] Further, see Figure 10 and Figure 12 The bottom plate assembly 140 further includes a first heat insulating sheet 145 , which is disposed on the supporting bottom plate 141 and covers the exhaust hole 144 . The first heat insulating sheet 145 is configured to break under a preset pressure or melt at a preset temperature.

[0122] Specifically, the first thermal insulation sheet 145 can be a single piece, covering all of the exhaust holes 144. Alternatively, the first thermal insulation sheet 145 can be multiple pieces, each of which covers a corresponding exhaust hole 144. Adjacent first thermal insulation sheets 145 are spaced apart, independent of each other, and do not interfere with each other. The first thermal insulation sheet 145 can be directly bonded to the inner wall of the exhaust hole 144, thereby blocking the exhaust hole 144.

[0123] The first thermal insulation sheet 145 may be a mica sheet, which can maintain a relatively stable structural form under normal temperature and pressure. When the battery cell 200 experiences thermal runaway, high-temperature and high-pressure gas is ejected from the exhaust end of the battery cell 200, and the first thermal insulation sheet 145 at the corresponding exhaust hole 144 is broken by the high pressure or directly melted by the high temperature, thereby opening the exhaust hole 144 and allowing the battery cell 200 in thermal runaway to quickly complete pressure relief.

[0124] The high-temperature and high-pressure gas is depressurized through the corresponding exhaust holes 144 and enters the storage chamber 143, and the gas temperature and pressure are reduced. The remaining first thermal insulation sheets 145 separate the normal battery cells 200 from the storage chamber 143, so that the high-temperature gas in the storage chamber 143 will not affect the normal battery cells 200.

[0125] The above structure relies on the structural characteristics of the first thermal insulation sheet 145 that can break at a preset pressure or melt at a preset temperature. The high-temperature gas generated by the battery cell 200 in thermal runaway can break through the first thermal insulation sheet 145 and pass through the exhaust hole 144, completing the pressure release in a shorter path without affecting the normal operation of the remaining battery cells 200, thereby improving the overall operational reliability of the battery device 10.

[0126] Further, see Figure 10 and Figure 12 The base plate assembly 140 further includes an insulating plate 146 , which is disposed on a side of the supporting base plate 141 away from the bottom guard plate 142 , and a plurality of rubber retaining rings 147 are formed on the insulating plate 146 , and the rubber retaining rings 147 correspond to and surround the exhaust holes 144 .

[0127] Specifically, the insulating plate 146 can be an insulating plate-like structure such as a ceramic plate or mica plate. The arrangement of all the rubber retaining rings 147 on the insulating plate 146 is consistent with the arrangement of all the exhaust holes 144 on the supporting base plate 141. The insulating plate 146 is laid on the surface of the supporting base plate 141 facing away from the bottom guard plate 142, and the rubber retaining rings 147 thereon surround the corresponding exhaust holes 144. It should be noted that the middle of the rubber retaining ring 147 is through-hole, providing exhaust clearance for the exhaust end of the battery cell 200.

[0128] In the above structure, the glue retaining ring 147 on the insulating plate 146 can prevent the structural glue between the battery cell 200 and the supporting base plate 141 from overflowing to the exhaust hole 144, and prevent the structural glue from contacting the exhaust end of the battery cell 200, so that the exhaust end of the battery cell 200 can be exhausted smoothly. At the same time, the insulating plate 146 as a whole provides insulation protection for the battery cell 200.

[0129] Further, see Figure 10 and Figure 12 The bottom plate assembly 140 also includes a second thermal insulation sheet 148, which is arranged on the side of the bottom guard plate 142 close to the supporting bottom plate 141, and the vertical projection of all the exhaust holes 144 relative to the bottom guard plate 142 is located within the vertical projection of the second thermal insulation sheet 148 relative to the bottom guard plate 142.

[0130] Specifically, the second heat insulating sheet 148 can also be an insulating plate structure such as a ceramic plate or a mica plate, which can be fixed to the bottom guard plate 142 by bonding or screws. The second heat insulating sheet 148 is provided on the bottom guard plate 142 near the surface of the supporting bottom plate 141.

[0131] When thermal runaway occurs in the battery cell 200, the high-temperature gas ejected from its exhaust end will first impact the second thermal insulation sheet 148 on the bottom guard plate 142. The second thermal insulation sheet 148 provides buffering protection for the bottom guard plate 142, reducing the probability of the bottom guard plate 142 being damaged by the impact of the high-temperature gas, and also reducing the risk of the bottom guard plate 142 catching fire.

[0132] In addition, an embodiment of the present application further provides an electrical device, which includes the battery device 10 of any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0133] Specifically, see Figure 1 and Figure 2 , electrical equipment can be vehicles 20, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0134] The electrical equipment of the embodiment of the present application has good stability and reliability in use because it is equipped with the above-mentioned battery device 10.

[0135] See also Figures 1 to 12 The present invention provides a battery device 10 and an electrical device. The battery device 10 includes a housing 100 having a housing cavity 110. The housing 100 includes a frame beam 120 surrounding the housing cavity 110. The frame beam 120 defines a first exhaust passage 121 communicating with the housing cavity 110. A plurality of battery cells 200 are disposed in the housing cavity 110. A pressure relief mechanism 300 is disposed in the frame beam 120 and communicates with the first exhaust passage 121. The electrical device includes the battery device 10.

[0136] The battery device 10 of the embodiment of the present application forms a first exhaust channel 121 connected to the accommodating cavity 110 inside the side frame beam 120 of the box body 100, and sets a pressure relief mechanism 300 in the side frame beam 120, and makes the pressure relief mechanism 300 connected to the first exhaust channel 121. The high-temperature gas generated by the battery cell 200 in the accommodating cavity 110 due to thermal runaway can directly flow into the first exhaust channel 121, and then guide the first exhaust channel 121 to the pressure relief mechanism 300, and finally be discharged through the pressure relief mechanism 300. In the above structure, the first exhaust channel 121 for exhaust and the pressure relief mechanism 300 are integrated on the frame beam 120, and the high-temperature gas at each location in the accommodating cavity 110 can flow to the pressure relief mechanism 300 on the frame beam 120 through the first exhaust channel 121. The position of the pressure relief mechanism 300 on the frame beam 120 is higher than the bottom of the accommodating cavity 110, which can effectively reduce the probability of high-temperature gas backflow and retention, improve the exhaust effect, and make the battery device 10 have good operating stability and reliability. At the same time, there is no need to set a separate flue structure inside the accommodating cavity 110, so that more battery cells 200 can be placed in the accommodating cavity 110, thereby improving the overall energy density of the battery device 10.

[0137] The electrical equipment of the embodiment of the present application has good stability and reliability in use because it is equipped with the above-mentioned battery device 10.

[0138] 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.

[0139] 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: A box body having a accommodating cavity, the box body including a middle beam and a frame beam surrounding the accommodating cavity, a first exhaust channel communicating with the accommodating cavity being formed inside the frame beam, the middle beam being arranged inside the frame beam and connected to the frame beam, the frame beam and the middle beam dividing the accommodating cavity into a plurality of accommodating partitions, a second exhaust channel being formed inside the middle beam, the plurality of accommodating partitions being communicated with the second exhaust channel, and the second exhaust channel being further communicated with the first exhaust channel; A plurality of battery cells are arranged in the accommodating cavity; The pressure relief mechanism is provided on the frame beam and is communicated with the first exhaust channel.

2. The battery device according to claim 1, wherein: The frame beam includes a frame beam body and a limiting beam. The limiting beam is arranged on a side of the frame beam body close to the accommodating cavity. The first exhaust channel is formed inside the frame beam body and / or the limiting beam.

3. The battery device according to claim 2, characterized in that The frame beam further includes a first reinforcement strip, which is disposed in the first exhaust channel and divides the first exhaust channel into a plurality of first sub-air channels that are interconnected, and at least one of the first sub-air channels is connected to the pressure relief mechanism.

4. The battery device according to claim 3, characterized in that The first reinforcement strip and the frame beam body are constructed as an integrally formed structure; and / or the first reinforcement strip and the limiting beam are constructed as an integrally formed structure.

5. The battery device according to claim 1, wherein: The middle beam includes a middle beam body and a second reinforcement strip. The second reinforcement strip is arranged in the second exhaust channel and divides the second exhaust channel into a plurality of second sub-air channels that are interconnected. At least one of the second sub-air channels is connected to the pressure relief mechanism.

6. The battery device according to claim 5, characterized in that The second reinforcement bar and the middle beam body are constructed as an integrally formed structure.

7. The battery device according to any one of claims 1 to 6, characterized in that: The box body further includes a bottom plate assembly, which is surrounded by the frame beam to form the accommodating cavity, and the plurality of battery cells are fixed to the bottom plate assembly.

8. The battery device according to claim 7, characterized in that The bottom plate assembly includes a supporting bottom plate and a bottom guard plate, a storage cavity is formed between the supporting bottom plate and the bottom guard plate, a plurality of exhaust holes are provided on the supporting bottom plate, the exhaust end of the battery cell faces the corresponding exhaust hole and is connected to the storage cavity through the exhaust hole, and the storage cavity is also connected to the first exhaust channel.

9. The battery device according to claim 8, characterized in that The base plate assembly further includes a first heat insulating sheet, which is disposed on the supporting base plate and covers the exhaust hole. The first heat insulating sheet is configured to break at a preset pressure or melt at a preset temperature.

10. The battery device according to claim 9, characterized in that The base plate assembly further includes an insulating plate, which is arranged on a side of the supporting base plate away from the bottom guard plate, and a plurality of rubber retaining rings are formed on the insulating plate, and the rubber retaining rings correspondingly surround the exhaust holes.

11. The battery device according to claim 8, characterized in that The base plate assembly also includes a second thermal insulation sheet, which is arranged on the side of the base plate close to the supporting base plate, and the vertical projections of all the exhaust holes relative to the base plate are located within the vertical projection of the second thermal insulation sheet relative to the base plate.

12. An electrical device, characterized in that: The battery device according to any one of claims 1 to 11 is used to provide electrical energy.

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