Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device.The battery device comprises a box body, a battery monomer assembly and an anti-explosion valve, the box body is provided with a containing space and comprises a side wall, the inner side face of the side wall is provided with a vent hole communicated with the containing space, and the outer side face of the side wall is provided with a mounting hole; the side wall is provided with a cavity communicated with the vent hole and the mounting hole, the battery monomer assembly is arranged in the accommodating space, the anti-explosion valve is mounted in the mounting hole, and the vent hole and the mounting hole which are formed in the same side wall are arranged at an interval in the direction perpendicular to the axial direction of the vent hole. The battery device is beneficial to improving the reliability of the battery device.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The reliability of the battery device is a problem that cannot be ignored. Therefore, how to improve the reliability of the battery device is an urgent technical problem in the battery technology. CONTENT OF THE INVENTION

[0004] Therefore, the embodiments of the present application provide a battery device and a power utilization device to improve the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device, which comprises a box body, a battery monomer assembly and an explosion-proof valve. The box body has a containing space. The box body comprises a side wall. The inner side of the side wall is provided with a ventilation hole in communication with the containing space. The outer side of the side wall is provided with a mounting hole. The side wall has a cavity in communication with the ventilation hole and the mounting hole. The battery monomer assembly is arranged in the containing space. The explosion-proof valve is mounted in the mounting hole. The ventilation hole and the mounting hole arranged on the same side wall are arranged in a direction perpendicular to the axis of the ventilation hole.

[0006] Through the above technical solution, the battery device provided by the present application arranges the ventilation hole and the mounting hole in a spaced manner. The high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas can enter the cavity from the ventilation hole and then be discharged through the explosion-proof valve at the mounting hole. The pressure can be released through the cavity, which is conducive to improving the safety of the explosion-proof valve. Moreover, such arrangement is conducive to cooling the high-temperature gas in the cavity and extinguishing the flame carried by the high-temperature gas in the cavity, thereby avoiding the high-temperature gas and the flame carried thereby from being directly discharged from the explosion-proof valve, avoiding damaging or even igniting other components near the explosion-proof valve, and further improving the reliability of the battery device.

[0007] In some embodiments, the ventilation hole and the mounting hole are arranged in a spaced manner along a direction intersecting the height direction of the box body.

[0008] In this way, the air vent and the mounting hole are arranged in a spaced manner, which can save the size of the battery device in the height direction of the box, thereby reducing the space occupied by the battery device in the height direction of the box. In addition, the size of the battery device in the height direction of the box is small, the air vent and the mounting hole are arranged in a spaced manner in the direction intersecting the height direction of the box, which can increase the spacing distance of the air vent and the mounting hole, thereby increasing the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas in the cavity, cooling the high-temperature gas in the cavity, and extinguishing the flame carried by the high-temperature gas, thereby improving the reliability of the battery device.

[0009] In some embodiments, the center axis of the air vent is a first axis, the center axis of the mounting hole is a second axis, and the distance between the first axis and the second axis is greater than or equal to 200 mm.

[0010] In this way, the battery device provided by the present application can increase the spacing distance of the air vent and the mounting hole, thereby increasing the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas in the cavity, cooling the high-temperature gas in the cavity, and extinguishing the flame carried by the high-temperature gas, thereby improving the reliability of the battery device.

[0011] In some embodiments, the distance between the first axis and the second axis is less than or equal to 500 mm.

[0012] In this way, the battery device provided by the present application can make the path length of the high-temperature gas generated after the thermal runaway of the battery monomer assembly in the cavity within a certain range, thereby avoiding the increase of the pressure in the cavity and the containing space due to the long residence time of the high-temperature gas in the cavity.

[0013] In some embodiments, the air vent is a plurality of air vents arranged in a spaced manner, and the distance between the first axis of the air vent closest to the mounting hole and the second axis is greater than or equal to 200 mm.

[0014] In this way, the battery device provided by the present application can increase the spacing distance of the air vent and the mounting hole, thereby increasing the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas in the cavity, cooling the high-temperature gas in the cavity, and extinguishing the flame carried by the high-temperature gas, thereby improving the reliability of the battery device.

[0015] In some embodiments, the cavity includes a plurality of sub-cavities arranged in parallel in the height direction of the box, and at least one sub-cavity is communicated with the air vent and the mounting hole.

[0016] In this way, the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas can enter at least one sub-cavity from the vent hole, and can be discharged from the explosion-proof valve at the mounting hole, so that the high-temperature gas can be smoothly discharged from the explosion-proof valve.

[0017] In some embodiments, at least one sub-cavity is in communication with the mounting hole and is not in communication with the vent hole, and the sub-cavity not in communication with the vent hole is filled with a blocking material.

[0018] In this way, the high-temperature gas generated after the thermal runaway of the battery monomer assembly will not enter the sub-cavity in communication with the mounting hole and not in communication with the vent hole, which is beneficial to avoid the accumulation of high-temperature gas in the sub-cavity in communication with the mounting hole and not in communication with the vent hole, thereby facilitating the reduction of the pressure in the cavity and the containing space. In addition, if the high-temperature gas enters the sub-cavity in communication with the mounting hole and not in communication with the vent hole, it will cause turbulent flow of the high-temperature gas, which is not easy to discharge from the explosion-proof valve, and may cause the pressure in the cavity and the containing space to increase. Therefore, the battery device provided by the present application blocks the sub-cavity in communication with the mounting hole and not in communication with the vent hole with a blocking material, which can make the high-temperature gas smoothly discharge from the explosion-proof valve, and is beneficial to reduce the pressure in the cavity and the containing space.

[0019] In some embodiments, the side wall includes two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the first direction being perpendicular to the second direction, and both the first direction and the second direction being perpendicular to the height direction of the box body;

[0020] The vent hole is arranged on at least one of the first side wall and the second side wall, and the mounting hole is arranged on at least one of the first side wall and the second side wall, the vent hole on the first side wall being a first vent hole, the vent hole on the second side wall being a second vent hole, the mounting hole on the first side wall being a first mounting hole, and the mounting hole on the second side wall being a second mounting hole;

[0021] The cavity is arranged in at least one of the first side wall and the second side wall, the cavity in the first side wall being a first cavity, and the cavity in the second side wall being a second cavity, the first cavity being in communication with the first vent hole and the first mounting hole arranged at intervals, and the second cavity being in communication with the second vent hole and the second mounting hole arranged at intervals;

[0022] The explosion-proof valve includes a first explosion-proof valve mounted in the first mounting hole and a second explosion-proof valve mounted in the second mounting hole.

[0023] In this way, the battery device provided by the application can discharge the high-temperature gas by using the first vent hole, the first cavity, the first mounting hole and the first explosion-proof valve mounted in the first mounting hole of the first side wall, and can also discharge the high-temperature gas by using the second vent hole, the second cavity, the second mounting hole and the second explosion-proof valve mounted in the second mounting hole of the second side wall, which is beneficial to increase the discharge efficiency of the high-temperature gas, thereby being beneficial to release the pressure in the containing space more quickly, and further being beneficial to improve the reliability of the battery device.

[0024] In some embodiments, the first vent hole and the first mounting hole are spaced apart along the second direction, and / or the second vent hole and the second mounting hole are spaced apart along the first direction.

[0025] Such an arrangement can save the size of the battery device in the height direction of the box, thereby being beneficial to reduce the space occupied by the battery device in the height direction of the box. In addition, the size of the battery device in the height direction of the box is small, the first vent hole and the first mounting hole are spaced apart along the second direction perpendicular to the height direction of the box, which can increase the spacing distance of the first vent hole and the first mounting hole, and / or the second vent hole and the second mounting hole are spaced apart along the first direction perpendicular to the height direction of the box, which can increase the spacing distance of the second vent hole and the second mounting hole. Therefore, the battery device provided by the application can increase the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas in the cavity, can cool the high-temperature gas in the cavity, and is also beneficial to extinguish the flame carried by the high-temperature gas, thereby being beneficial to improve the reliability of the battery device.

[0026] In some embodiments, the battery device provided by the application further comprises a plurality of buffer members, the buffer members are arranged in the containing space and on at least one side of the battery monomer assembly in the height direction of the box, and the plurality of buffer members form the first exhaust passage and the second exhaust passage intersecting each other.

[0027] The side wall comprises two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are both perpendicular to the height direction of the box.

[0028] The vent hole is arranged on at least one first side wall and at least one second side wall, the first exhaust passage communicates with the vent hole on the first side wall, and the second exhaust passage communicates with the vent hole on the second side wall.

[0029] In this way, the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas can be discharged to the cavity of the first side wall through the first exhaust channel and the air holes on the first side wall, and can also be discharged to the cavity of the second side wall through the second exhaust channel and the air holes on the second side wall, which is beneficial to improve the discharge efficiency of the high-temperature gas and the flame carried thereby in the containing space, thereby being beneficial to reduce the pressure in the containing space, and further being beneficial to improve the reliability of the battery device.

[0030] In some embodiments, the plurality of buffer members are arranged at intervals along a first direction and at intervals along a second direction, a first exhaust channel is formed between two adjacent buffer members along the first direction, a second exhaust channel is formed between two adjacent buffer members along the second direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are both perpendicular to the height direction of the box body.

[0031] In this way, the first exhaust channel is perpendicular to the second exhaust channel, and the arrangement of the plurality of buffer members is regular, which is beneficial to manufacturing.

[0032] In a second aspect, the present application provides a power utilization device, which comprises the battery device of any of the above embodiments.

[0033] The power utilization device provided by the present application has the same or similar technical effects as the battery device of any of the above embodiments, which will not be described here.

[0034] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0037] Figure 2 is an exploded structural schematic diagram of a battery device provided by some embodiments of the present application;

[0038] Figure 3 is a structural schematic diagram of a battery monomer assembly provided by some embodiments of the present application;

[0039] Figure 4 is one of the schematic diagrams of the top view structure of the battery device provided by some embodiments of the present application, wherein the top cover is not shown;

[0040] Figure 5 is the schematic diagram of the sectional structure along the line A-A in Figure 4

[0041] Figure 6 is one of the schematic diagrams of the three-dimensional structure of the box provided by some embodiments of the present application, wherein the top cover is not shown;

[0042] Figure 7 Figure 6 is the schematic diagram of the sectional structure along the line B-B in

[0043] Figure 8 is the schematic diagram of the sectional structure along the line C in Figure 7

[0044] Figure 9 is the schematic diagram of the sectional structure along the line D in Figure 6

[0045] Figure 10 is the schematic diagram of the sectional structure of the box provided by some embodiments of the present application;

[0046] Figure 11 is the second schematic diagram of the top view structure of the battery device provided by some embodiments of the present application, wherein the top cover is not shown.

[0047] The meanings of the marks in the figures are as follows:

[0048] Vehicle 1000; battery device 100; controller 200; motor 300;

[0049] Box 10; accommodation space 1001; air hole 101; mounting hole 102; cavity 103; sub-cavity 1031; first sub-cavity 10311; second sub-cavity 10312; third sub-cavity 10313; fourth sub-cavity 10314; first exhaust passage 104; second exhaust passage 105; first box 11; second box 12; side wall 13; support rib 1301; first side wall 131; second side wall 132; bottom plate 14; top cover 15;

[0050] First axis 01; second axis 02; first path 03; second path 04;

[0051] Battery cell assembly 20; battery cell 21; busbar component 22;

[0052] Explosion-proof valve 30; sealing material 40; buffer 50. DETAILED DESCRIPTION

[0053] ​​​​The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including," "comprising," "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Use of the term "about" in relation to a geographic location refers to a location within a 10 km radius of the geographic location.

[0055] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0056] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0058] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0059] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. The devices or elements indicated by the orientation or position must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0062] Unless otherwise specified, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0063] The reliability of the battery device is a problem that cannot be ignored. The battery device generally includes a box body and at least one battery monomer assembly arranged in the box body. The battery monomer assembly includes a plurality of battery monomers. After the battery monomers are in thermal runaway, high-temperature gas is generated and released into the box body. The high-temperature gas can also carry a flame, which can cause a certain air pressure in the interior of the box body. To ensure the safety of the battery device, a pressure relief mechanism (for example, an explosion-proof valve) is generally arranged on the side wall of the box body. The high-temperature gas generated in the interior of the box body is discharged through the pressure relief mechanism, and the pressure is released to ensure the safety of the battery device.

[0064] In the battery device, the inner side of the side wall of the box body is provided with a vent hole, and the outer side of the side wall of the box body is provided with a mounting hole. The explosion-proof valve is mounted in the mounting hole, and the vent hole and the mounting hole are oppositely arranged. The high-temperature gas generated after the battery monomers are in thermal runaway can directly pass through the vent hole and be discharged from the explosion-proof valve. The high-temperature and high-pressure gas can cause damage to the explosion-proof valve and the components near the explosion-proof valve. The flame carried by the high-temperature gas can ignite the components near the explosion-proof valve, and the reliability is poor.

[0065] Therefore, the embodiments of the present application provide a battery device. The battery device includes a box body, a battery monomer assembly, and an explosion-proof valve. The box body has an accommodation space. The box body includes a side wall. The inner side of the side wall is provided with a vent hole in communication with the accommodation space. The outer side of the side wall is provided with a mounting hole. The side wall has a cavity in communication with the vent hole and the mounting hole. The battery monomer assembly is arranged in the accommodation space. The explosion-proof valve is mounted in the mounting hole. The vent hole and the mounting hole are spaced apart.

[0066] It can be understood that the battery device provided in the application is provided with the ventilation hole and the mounting hole, and the high-temperature gas generated after the thermal runaway of the battery monomer assembly and the flame carried by the high-temperature gas can enter the cavity through the ventilation hole and then be discharged through the explosion-proof valve at the mounting hole, and the pressure can be released through the cavity, which is beneficial to improve the safety of the explosion-proof valve. Moreover, the arrangement is beneficial to the cooling of the high-temperature gas in the cavity and the extinguishing of the flame carried by the high-temperature gas in the cavity, thereby being beneficial to avoid the direct discharge of the high-temperature gas and the flame carried by the high-temperature gas from the explosion-proof valve, being beneficial to avoid the damage or even ignition of other components near the explosion-proof valve, and further being beneficial to improve the reliability of the battery device.

[0067] The technical solutions described in the embodiments of the application are suitable for the battery device and the energy storage device and the power consumption device using the battery device.

[0068] In the embodiments of the application, the battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging to continue to be used.

[0069] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., for example, a high-nickel ternary battery, and the application embodiments are not limited thereto.

[0070] The battery device disclosed in the embodiments of the application can be used in various energy storage devices, energy storage systems and charging networks using the battery device as an energy storage element or a power consumption device using the battery device as a power source. The power consumption device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, for example, a game machine, an electric car toy, an electric ship toy and an electric aircraft toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0071] The following embodiments take a power consumption device in some embodiments of the application, i.e., a vehicle 1000, as an example for illustration.

[0072] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery apparatus 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery apparatus 100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 is used to control the battery apparatus 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0073] In some embodiments of the present application, the battery apparatus 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0074] Please refer to 2 and 3, Figure 2 An exploded structural schematic diagram of the battery apparatus 100 is provided for some embodiments of the present application, Figure 3 A structural schematic diagram of a battery cell assembly 20 is provided for some embodiments of the present application. The battery apparatus 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 can include a plurality of battery cells 21, and the plurality of battery cells 21 are connected in series, parallel or mixed connection through busbar components 22.

[0075] In some embodiments, the plurality of battery cells 21 in the battery apparatus 100 can be electrically connected through the busbar components 22 to realize parallel, series or mixed connection of the plurality of battery cells 21 in the battery apparatus 100.

[0076] In some embodiments, the battery cell assembly 20 is usually formed by arranging a plurality of battery cells 21; as an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing a plurality of battery cells 21 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 with a cable tie.

[0077] In some embodiments, the battery apparatus 100 can be a battery pack, which includes a box body 10 and one or more battery cell assemblies 20, and the battery cell assemblies 20 are accommodated in the box body 10.

[0078] As an example, the battery cell assembly 20 can be a battery module, and the battery cell assembly 20 can be accommodated in the case 10 by fixing the battery module in the case 10.

[0079] As an example, the battery cell assembly 20 can also be accommodated in the case 10 by fixing a plurality of battery cells 21 directly to the case 10.

[0080] As an example, the case 10 can include a first case 11 (e.g., a lower case) and a second case 12 (e.g., an upper case). The first case 11 and the second case 12 are fastened so that an enclosed accommodation space is formed inside the case 10 to accommodate the battery cell assembly 20. Here, enclosed means covered or closed, which can be sealed or unsealed.

[0081] As an example, the case 10 can include a top cover 15, a side wall 13, and a bottom plate 14. The top cover 15 and the bottom plate 14 are connected to the side wall 13, respectively, so that an enclosed accommodation space is formed inside the case 10 to accommodate the battery cell assembly 20.

[0082] As an example, the case 10 can be part of a chassis structure of the vehicle 1000. For example, the top cover 15 of the case 10 can be at least part of a floor of the vehicle 1000, or the side wall 13 of the case 10 can be at least part of a cross beam and a longitudinal beam of the vehicle 1000.

[0083] Please refer to Figure 4 and Figure 5 , Figure 4 is a top view structural schematic diagram of the battery device 100 provided by some embodiments of the present application, in which the top cover 15 is not shown, Figure 5 is a sectional view structural schematic diagram along the A-A line in Figure 4 The battery device 100 provided by the present application includes a case 10 and a rupture disc 30, the case 10 has an accommodation space, the case 10 includes a side wall 13, an inner side surface of the side wall 13 is provided with a vent hole 101 communicating with the accommodation space, an outer side surface of the side wall 13 is provided with a mounting hole 102, the vent hole 101 and the mounting hole 102 communicate, and the rupture disc 30 is mounted in the mounting hole 102.

[0084] In the related art, the vent hole 101 and the mounting hole 102 are arranged oppositely, the battery cell assembly 20 is arranged in the accommodation space, and the high-temperature gas generated after the thermal runaway of the battery cell 21 can directly enter the vent hole 101 from the accommodation space and be discharged from the rupture disc 30. The high-temperature and high-pressure gas can cause damage to the rupture disc 30 and components near the rupture disc 30, and the flame carried by the high-temperature gas can ignite the components near the rupture disc 30, which has poor reliability.

[0085] Please refer to Figure 6 , Figure 7 andFigure 8 , Figure 6 is a perspective view of the box 10 provided by some embodiments of the present application, wherein the top cover 15 is not shown, Figure 7 is a sectional view structure schematic diagram along the B-B line in Figure 6 Figure 8 is a sectional view structure schematic diagram along the C-C line in Figure 7 It should be noted that the spaced arrangement of the vent hole 101 and the mounting hole 102 means that the central axis (first axis 01) of the vent hole 101 and the central axis (second axis 02) of the mounting hole 102 are parallel, and in a cross section perpendicular to the first axis 01, the orthographic projection of the vent hole 101 and the orthographic projection of the mounting hole 102 are spaced apart.

[0086] It can be understood that the battery device 100 provided by the embodiments of the present application allows the vent hole 101 and the mounting hole 102 to be spaced apart, and the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas can enter the cavity 103 from the vent hole 101, and then be discharged through the explosion-proof valve 30 at the mounting hole 102, and the pressure can be released through the cavity 103, which is conducive to improving the safety of the explosion-proof valve 30. And this arrangement is conducive to cooling the high-temperature gas in the cavity 103, and conducive to extinguishing the flame carried by the high-temperature gas in the cavity 103, thereby avoiding the high-temperature gas and the flame carried by the high-temperature gas from being directly discharged from the explosion-proof valve 30, avoiding damaging even igniting other components near the explosion-proof valve 30, and thereby improving the reliability of the battery device 100.

[0087] Please continue to refer to

[0088] In some embodiments, the vent hole 101 and the mounting hole 102 are spaced apart along a direction intersecting the height direction Z of the box 10, that is, the spacing direction of the vent hole 101 and the mounting hole 102 intersects the height direction Z of the box 10, in other words, the included angle between the spacing direction of the vent hole 101 and the mounting hole 102 and the height direction Z of the box 10 is greater than 0° and less than or equal to 90°. The spacing direction of the vent hole 101 and the mounting hole 102 can be the distribution direction of the vent hole 101 and the mounting hole 102, and can be a direction parallel to the line connecting the center of the vent hole 101 and the center of the mounting hole 102. Figure 8

[0089] ​​Optionally, the vent hole 101 and the mounting hole 102 are spaced apart in a direction perpendicular to the height direction Z of the box body 10, that is, the spacing direction of the vent hole 101 and the mounting hole 102 is perpendicular to the height direction Z of the box body 10, in other words, the included angle between the spacing direction of the vent hole 101 and the mounting hole 102 and the height direction Z of the box body 10 is equal to 90°.

[0090] In the case where the axial direction of the vent hole 101 is the first direction X, the direction perpendicular to the axial direction of the vent hole 101 can be the second direction Y, and in the case where the axial direction of the vent hole 101 is the second direction Y, the direction perpendicular to the axial direction of the vent hole 101 can be the first direction X.

[0091] In this way, the battery device 100 provided by the embodiments of the present application can save the size of the battery device 100 in the height direction Z of the box body 10, thereby facilitating the reduction of the space occupied by the battery device 100 in the height direction Z of the box body 10. In addition, the size of the battery device 100 in the height direction Z of the box body 10 is small, the vent hole 101 and the mounting hole 102 are spaced apart in the direction intersecting the height direction Z of the box body 10, which can increase the spacing distance of the vent hole 101 and the mounting hole 102, thereby facilitating the increase of the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas in the cavity 103, which can cool the high-temperature gas in the cavity 103, and also facilitates the extinguishing of the flame carried by the high-temperature gas, thereby facilitating the improvement of the reliability of the battery device 100.

[0092] In some embodiments, the center axis of the vent hole 101 is the first axis 01, the center axis of the mounting hole 102 is the second axis 02, and the distance between the first axis 01 and the second axis 02 is greater than or equal to 200 mm. For example, the distance between the first axis 01 and the second axis 02 can be 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, 260 mm, 270 mm, 280 mm, 290 mm, 300 mm, etc. Wherein the sum of the radial dimensions of the vent hole 101 and the mounting hole 102 is less than 200 mm.

[0093] In this way, the battery device 100 provided by the embodiments of the present application can increase the spacing distance of the vent hole 101 and the mounting hole 102, thereby facilitating the increase of the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas in the cavity 103, which can cool the high-temperature gas in the cavity 103, and also facilitates the extinguishing of the flame carried by the high-temperature gas, thereby facilitating the improvement of the reliability of the battery device 100.

[0094] Optionally, the distance between the first axis 01 and the second axis 02 is less than or equal to 500 mm. For example, the distance between the first axis 01 and the second axis 02 can be 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, etc.

[0095] In this way, the battery device 100 provided by the application can make the path length of the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 in the cavity 103 within a certain range, which is beneficial to avoid the pressure increase in the cavity 103 and the containing space caused by the high-temperature gas staying for too long.

[0096] Please refer to Figure 9 , and in combination with Figure 8 In some embodiments, the vent hole 101 is multiple and is arranged at intervals, and among the multiple vent holes 101, the distance between the first axis 01 and the second axis 02 of the vent hole 101 closer to the mounting hole 102 is greater than or equal to 200 mm.

[0097] It can be understood that the multiple vent holes 101 are located on the same side of the mounting hole 102, and the minimum distance between the first axis 01 and the second axis 02 is greater than or equal to 200 mm.

[0098] Optionally, the interval direction of the vent hole 101 and the mounting hole 102 is consistent with the interval direction of the multiple vent holes 101, and when the multiple vent holes 101 are arranged at intervals along the first direction, the vent hole 101 and the mounting hole 102 are arranged at intervals along the first direction, and when the multiple vent holes 101 are arranged at intervals along the second direction, the vent hole 101 and the mounting hole 102 are arranged at intervals along the second direction.

[0099] In this way, the battery device 100 provided by the embodiments of the application can further increase the interval distance of the vent hole 101 and the mounting hole 102, thereby being beneficial to increasing the path of the high-temperature gas and the flame carried by the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 in the cavity 103, can make the high-temperature gas cool down in the cavity 103, and is also beneficial to extinguishing the flame carried by the high-temperature gas, thereby being beneficial to improving the reliability of the battery device 100.

[0100] Please refer to Figure 10 , Figure 10 is a partial cross-sectional structural schematic view of the box 10 provided by some embodiments of the application, and in some embodiments, the cavity 103 includes multiple sub-cavities 1031 arranged side by side along the height direction Z of the box 10, and at least one sub-cavity 1031 is communicated with the vent hole 101 and the mounting hole 102. Two adjacent sub-cavities 1031 are separated by a support rib 1301 inside the cavity 103. Among them, the cavity 103 can save the material of the side wall 13, and the support rib 1301 can improve the strength of the side wall 13.

[0101] Optionally, the plurality of sub-cavities 1031 can be a first sub-cavity 10311, a second sub-cavity 10312, a third sub-cavity 10313 and a fourth sub-cavity 10314 respectively, wherein at least one of the first sub-cavity 10311, the second sub-cavity 10312, the third sub-cavity 10313 and the fourth sub-cavity 10314 is in communication with both the vent hole 101 and the mounting hole 102, for example, the third sub-cavity 10313 is in communication with both the vent hole 101 and the mounting hole 102.

[0102] In this way, the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas can enter at least one sub-cavity 1031 from the vent hole 101, and can be discharged from the explosion-proof valve 30 at the mounting hole 102, so that the high-temperature gas can be smoothly discharged from the explosion-proof valve 30.

[0103] Optionally, the plurality of sub-cavities 1031 are not in communication with each other, which is conducive to avoiding the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 from moving between different sub-cavities 1031 (causing airflow turbulence), and is conducive to the smooth discharge of the high-temperature gas from the explosion-proof valve 30 at the mounting hole 102, thereby facilitating the smoothness of the high-temperature gas discharge.

[0104] In some embodiments, at least one sub-cavity 1031 is in communication with the mounting hole 102 and not in communication with the vent hole 101. For example, the second sub-cavity 10312 and the fourth sub-cavity 10314 are both in communication with the mounting hole 102, but the second sub-cavity 10312 and the fourth sub-cavity 10314 are both not in communication with the vent hole 101.

[0105] It can be understood that when the size of the sub-cavity 1031 in the height direction Z of the box body 10 is small, in order to install the explosion-proof valve 30 and make the high-temperature gas discharge smoothly, the aperture of the mounting hole 102 is large, and the mounting hole 102 will be in communication with the adjacent sub-cavity 1031 at the same time, which may cause the high-temperature gas to enter the sub-cavity 1031 in communication with the mounting hole 102 and not in communication with the vent hole 101, thereby avoiding the accumulation of high-temperature gas in the sub-cavity 1031 in communication with the mounting hole 102 and not in communication with the vent hole 101.

[0106] To solve the above technical problems, in the battery device 100 provided in the present application, the sub-cavity 1031 not in communication with the vent hole 101 is filled with a sealing material 40, for example, the second sub-cavity 10312 and the fourth sub-cavity 10314 are both filled with a sealing material 40. Wherein, the sealing material 40 can be a sealing glue.

[0107] In this way, the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 cannot enter the sub-cavity 1031 that is in communication with the mounting hole 102 and not in communication with the vent hole 101, which is conducive to avoiding the accumulation of high-temperature gas in the sub-cavity 1031 that is in communication with the mounting hole 102 and not in communication with the vent hole 101, thereby facilitating the prevention of pressure rise in the cavity 103, thereby facilitating the improvement of reliability. In addition, if the high-temperature gas enters the sub-cavity 1031 that is in communication with the mounting hole 102 and not in communication with the vent hole 101, it will cause airflow turbulence, and the high-temperature gas will not be easily discharged from the explosion-proof valve 30, which may cause the pressure in the cavity 103 and the containing space to increase. Therefore, the battery device 100 provided by the embodiment of the present application blocks the sub-cavity 1031 that is in communication with the mounting hole 102 and not in communication with the vent hole 101 by using the blocking material 40, which can make the high-temperature gas be smoothly discharged from the explosion-proof valve 30, and is conducive to reducing the pressure in the cavity 103 and the containing space.

[0108] It can be understood that the sub-cavity 1031 that is not in communication with the mounting hole 102 and the vent hole 101 does not need to be filled with the blocking material 40, for example, the first sub-cavity 10311 is not in communication with the mounting hole 102 and the vent hole 101, and the high-temperature gas cannot enter the first sub-cavity 10311, so that the blocking material 40 does not need to be filled.

[0109] Please continue to refer to Figure 7 , Figure 8 and Figure 10 In some embodiments, the side wall 13 includes two first side walls 131 arranged opposite to each other along a first direction X and two second side walls 132 arranged opposite to each other along a second direction Y, the first direction X is perpendicular to the second direction Y, and the first direction X and the second direction Y are both perpendicular to the height direction Z of the box body 10.

[0110] The vent hole 101 is arranged on at least one of the first side wall 131 and the second side wall 132, and the mounting hole 102 is arranged on at least one of the first side wall 131 and the second side wall 132. The vent hole 101 on the first side wall 131 is a first vent hole, the vent hole 101 on the second side wall 132 is a second vent hole, the mounting hole 102 on the first side wall 131 is a first mounting hole, and the mounting hole 102 on the second side wall 132 is a second mounting hole.

[0111] The cavity 103 is arranged in the at least one first side wall 131 and the at least one second side wall 132, the cavity 103 in the first side wall 131 is a first cavity, the cavity 103 in the second side wall 132 is a second cavity, the first cavity is communicated with the spaced first air hole and the first mounting hole, the second cavity is communicated with the spaced second air hole and the second mounting hole, and the explosion-proof valve 30 comprises a first explosion-proof valve arranged in the first mounting hole and a second explosion-proof valve arranged in the second mounting hole. Optionally, the first cavity and the second cavity are not communicated, so that the high-temperature gas in the first cavity and the second cavity can be prevented from moving back and forth (air flow is turbulent), and the high-temperature gas can be smoothly discharged from the explosion-proof valve 30.

[0112] Wherein, the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 can enter the first cavity from the first air hole, the high-temperature gas can be cooled in the first cavity, and the flame carried by the high-temperature gas can be extinguished in the first cavity, and then the high-temperature gas can be discharged from the first explosion-proof valve at the first mounting hole; the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 can also enter the second cavity from the second air hole, the high-temperature gas can be cooled in the second cavity, and the flame carried by the high-temperature gas can be extinguished in the second cavity, and then the high-temperature gas can be discharged from the second explosion-proof valve at the second mounting hole.

[0113] In this way, the battery device 100 provided by the embodiment of the present application can discharge the high-temperature gas by using the first air hole, the first cavity, the first mounting hole of the first side wall 131 and the first explosion-proof valve arranged in the first mounting hole, and can also discharge the high-temperature gas by using the second air hole, the second cavity, the second mounting hole of the second side wall 132 and the second explosion-proof valve arranged in the second mounting hole, which is beneficial to increase the discharge efficiency of the high-temperature gas, so as to facilitate faster release of the pressure in the containing space, and further facilitate improvement of the reliability of the battery device 100.

[0114] In some embodiments, the first air hole and the first mounting hole are spaced apart along the second direction Y, and / or the second air hole and the second mounting hole are spaced apart along the first direction X.

[0115] For example, the first air hole and the first mounting hole are spaced apart along the second direction Y.

[0116] For example, the second air hole and the second mounting hole are spaced apart along the first direction X.

[0117] For example, the first air hole and the first mounting hole are spaced apart along the second direction Y, and the second air hole and the second mounting hole are spaced apart along the first direction X.

[0118] Such an arrangement can save the size of the battery device 100 in the height direction Z of the box body 10, thereby facilitating reduction of the space occupied by the battery device 100 in the height direction Z of the box body 10.

[0119] In addition, the battery device 100 has a small size along the height direction Z of the box 10, the first ventilation holes and the first mounting holes are arranged along the second direction Y perpendicular to the height direction Z of the box 10, the interval distance of the first ventilation holes and the first mounting holes can be increased, the second ventilation holes and the second mounting holes are arranged along the first direction X perpendicular to the height direction Z of the box 10, and the interval distance of the second ventilation holes and the second mounting holes can be increased. Therefore, the battery device 100 provided by the embodiments of the present application can increase the path of the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas in the cavity 103, can cool the high-temperature gas in the cavity 103, is also beneficial to extinguishing the flame carried by the high-temperature gas, and thus is beneficial to improving the reliability of the battery device 100.

[0120] Please refer to Figure 11 , Figure 11 is a second schematic top view of the battery device 100 provided by some embodiments of the present application, wherein the top cover 15 is not shown, and in combination with Figure 10 In some embodiments, the battery device 100 provided by the embodiments of the present application further comprises a plurality of buffer members 50, the buffer members 50 are arranged in the accommodation space, and the buffer members 50 are arranged on at least one side of the battery monomer assembly 20 along the height direction Z of the box 10.

[0121] For example, the buffer members 50 can be arranged on the side of the battery monomer assembly 20 along the height direction Z of the box 10 towards the bottom plate 14.

[0122] For example, the buffer members 50 can be arranged on the side of the battery monomer assembly 20 along the height direction Z of the box 10 towards the top cover 15.

[0123] For example, the buffer members 50 can be arranged on the side of the battery monomer assembly 20 along the height direction Z of the box 10 towards the bottom plate 14 and on the side of the battery monomer assembly 20 along the height direction Z of the box 10 towards the top cover 15.

[0124] Among them, the plurality of buffer members 50 form intersecting first exhaust passages 104 and second exhaust passages 105, the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 and the flame carried by the high-temperature gas can flow along the first path 03 in the first exhaust passage 104, and can also flow along the second path 04 in the second exhaust passage 105.

[0125] It can be understood that the first exhaust passage 104 is in communication with the air vent hole 101 on the first side wall 131, the second exhaust passage 105 is in communication with the air vent hole 101 on the second side wall 132, and the high-temperature gas and the flame carried by the high-temperature gas generated after the thermal runaway of the battery monomer assembly 20 can be discharged from the first exhaust passage 104 and the air vent hole 101 (the first air vent hole) on the first side wall 131 to the cavity 103 (the first cavity) of the first side wall 131, and can also be discharged from the second exhaust passage 105 and the air vent hole 101 (the second air vent hole) on the second side wall 132 to the cavity 103 (the second cavity) of the second side wall 132. Therefore, the battery device 100 provided by the embodiment of the present application is beneficial to improve the discharge efficiency of the high-temperature gas and the flame carried by the high-temperature gas in the containing space, thereby being beneficial to reduce the pressure in the containing space, and further being beneficial to improve the reliability of the battery device 100.

[0126] Optionally, the plurality of buffer members 50 are arranged at intervals along the first direction X and at intervals along the second direction Y, and the first exhaust passage 104 is formed between two adjacent buffer members 50 along the first direction X, and the second exhaust passage 105 is formed between two adjacent buffer members 50 along the second direction Y.

[0127] In other words, the plurality of buffer members 50 can include a plurality of arrangement groups, the plurality of arrangement groups are arranged at intervals along the first direction X, the buffer members 50 in each arrangement group are multiple, the plurality of buffer members 50 in each arrangement group are arranged at intervals along the second direction Y, the first exhaust passage 104 is formed between two adjacent arrangement groups along the first direction X, and two adjacent buffer members 50 in each arrangement group are respectively located on two sides of the second exhaust passage 105 along the second direction Y. That is, the first exhaust passage is perpendicular to the second exhaust passage, and such arrangement can make the arrangement of the plurality of buffer members 50 regular, facilitate the arrangement of the buffer members in the box body 10, and thus facilitate the manufacture of the battery device 100.

[0128] Optionally, the buffer member 50 can be elastically supported between the battery monomer assembly 20 and the bottom plate 14.

[0129] Optionally, the buffer member 50 can be elastically supported between the battery monomer assembly 20 and the top cover 15.

[0130] Optionally, the buffer member 50 can be foam, silica gel, rubber, etc., that is, the buffer member 50 can produce elastic deformation to produce a buffering effect on the battery monomer assembly 20.

[0131] Optionally, the buffer 50 comprises at least one of high foaming polypropylene foam, silica foam and melamine foam, and each of the high foaming polypropylene foam, the silica foam and the melamine foam is flexible, so that the buffer 50 can have a buffering effect. It can be understood that when the buffer 50 comprises at least two of the high foaming polypropylene foam, the silica foam and the melamine foam, the at least two of the high foaming polypropylene foam, the silica foam and the melamine foam are stacked.

[0132] The embodiment of the present application further provides a power consuming device, which comprises the battery device 100 of any of the above embodiments.

[0133] The power consuming device provided by the embodiment of the present application has the same or similar technical effects as the battery device 100 of any of the above embodiments, and details are not described herein.

[0134] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body having a receiving space, the box body comprising a side wall, an inner side of the side wall being provided with a vent hole in communication with the receiving space, an outer side of the side wall being provided with a mounting hole, the side wall having a cavity in communication with the vent hole and the mounting hole; a battery cell assembly arranged in the receiving space; an explosion-proof valve arranged in the mounting hole; the vent hole and the mounting hole arranged on the same side wall are arranged in a direction perpendicular to the axial direction of the vent hole.

2. The battery device of claim 1, wherein The vent hole and the mounting hole are arranged in a direction intersecting the height direction of the box body.

3. The battery device of claim 1, wherein The central axis of the vent hole is a first axis, the central axis of the mounting hole is a second axis, and the distance between the first axis and the second axis is greater than or equal to 200 mm.

4. The battery device of claim 3, wherein The distance between the first axis and the second axis is less than or equal to 500 mm.

5. The battery device of claim 3, wherein The vent hole is a plurality of and is arranged in a plurality of, and the distance between the first axis of the vent hole closest to the mounting hole and the second axis is greater than or equal to 200 mm.

6. The battery device of claim 1, wherein The cavity comprises a plurality of sub-cavities arranged side by side in the height direction of the box body, and at least one of the sub-cavities is in communication with the vent hole and the mounting hole.

7. The battery device of claim 6, wherein At least one of the sub-cavities is in communication with the mounting hole and is not in communication with the vent hole, and the sub-cavity not in communication with the vent hole is filled with a sealing material.

8. The battery device according to any one of claims 1 to 7, wherein The side wall comprises two first side walls arranged opposite in a first direction and two second side walls arranged opposite in a second direction, the first direction being perpendicular to the second direction, and both the first direction and the second direction being perpendicular to the height direction of the box body. The vent hole is arranged on at least one of the first side walls and at least one of the second side walls, and the mounting hole is arranged on at least one of the first side walls and at least one of the second side walls, the vent hole on the first side wall is a first vent hole, the vent hole on the second side wall is a second vent hole, the mounting hole on the first side wall is a first mounting hole, and the mounting hole on the second side wall is a second mounting hole. The cavity is arranged in at least one of the first side walls and at least one of the second side walls, the cavity in the first side wall is a first cavity, and the cavity in the second side wall is a second cavity, the first cavity is in communication with the first vent hole and the first mounting hole arranged in a spaced manner, and the second cavity is in communication with the second vent hole and the second mounting hole arranged in a spaced manner. The explosion-proof valve comprises a first explosion-proof valve arranged in the first mounting hole and a second explosion-proof valve arranged in the second mounting hole.

9. The battery device of claim 8, wherein, The first vent hole and the first mounting hole are arranged in a spaced manner along the second direction, and / or the second vent hole and the second mounting hole are arranged in a spaced manner along the first direction.

10. The battery device according to any one of claims 1 to 7, wherein The battery device further comprises a plurality of buffers arranged in the receiving space and arranged on at least one side of the battery cell assembly in the height direction of the box body, and the plurality of buffers form intersecting first and second exhaust channels. The side walls include two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the first direction being perpendicular to the second direction, and both the first direction and the second direction being perpendicular to a height direction of the box body; The vent holes are arranged on at least one of the first side walls and at least one of the second side walls, the first exhaust passage communicates with the vent holes on the first side walls, and the second exhaust passage communicates with the vent holes on the second side walls.

11. The battery device of claim 10, wherein The plurality of buffer members are arranged spaced apart along the first direction and spaced apart along the second direction, the first exhaust passage is formed between two adjacent buffer members along the first direction, and the second exhaust passage is formed between two adjacent buffer members along the second direction.

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

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