Exhaust assembly, battery pack and electric device

Abstract

The utility model provides an exhaust assembly, a battery pack and a power utilization device.The exhaust assembly comprises an exhaust part, a connecting part and a sealing structure, and the exhaust part is used for receiving emissions from battery monomers; the exhaust assembly is connected to a box body of the battery pack through the connecting part, and the sealing structure is arranged at the connecting position of the connecting part and the box body. According to the battery pack, high-temperature and high-pressure gas and conductive particles discharged by the thermal runaway single battery can enter the exhaust part, and are directionally discharged to the outside of the battery pack through the exhaust part. The connecting part can be connected to the box body of the battery pack by adopting connecting pieces such as bolts and the like, and the sealing structure can block a gap at the connecting position of the connecting part and the box body, so that gas leakage can be avoided, and the problem of thermal runaway of surrounding normal single batteries is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to an exhaust assembly, a battery pack and an electric device. BACKGROUND

[0002] When the battery is in thermal runaway, high-temperature and high-pressure gas will be generated, at this time, the explosion-proof valve needs to be opened quickly to discharge the high-temperature and high-pressure gas through the explosion-proof valve, so as to avoid the battery pack from exploding instantaneously. However, due to the compact arrangement between the battery monomers, the high-temperature and high-pressure gas sprayed by the battery monomer in thermal runaway will have an adverse effect on the nearby normal battery monomers, resulting in thermal-electric separation failure. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide an exhaust assembly, a battery pack and an electric device to solve the problem that the high-temperature and high-pressure gas sprayed by the battery monomer in thermal runaway will cause the nearby normal battery monomers to be in thermal runaway.

[0004] The present application provides an exhaust assembly in the first aspect, wherein the exhaust assembly comprises an exhaust part, a connecting part and a sealing structure, the exhaust part is used for receiving the exhaust from the battery monomer; the exhaust assembly is connected to the box of the battery pack through the connecting part, and the sealing structure is arranged at the connecting position of the connecting part and the box.

[0005] In the present application, the high-temperature and high-pressure gas and conductive particles discharged by the battery in thermal runaway can enter the exhaust part and be discharged to the outside of the battery pack in a directional manner through the exhaust part. The connecting part can be connected to the box of the battery pack by using a bolt or the like, and the sealing structure can seal the gap at the connecting position of the connecting part and the box, so as to avoid gas leakage and prevent the surrounding normal batteries from being in thermal runaway.

[0006] In some embodiments, a first cavity is arranged in the exhaust part, and a side wall of the first cavity is provided with an exhaust hole for cooperating with the battery monomer. The high-temperature and high-pressure gas and conductive particles discharged by the battery in thermal runaway can enter the first cavity through the exhaust hole, so as to be discharged to the outside of the battery pack through the first cavity.

[0007] In some embodiments, the sealing structure comprises a second cavity, the second cavity is not communicated with the first cavity, and the connecting part is formed in the sealing structure. Since the first cavity and the second cavity are not communicated with each other, the high-temperature and high-pressure gas and conductive particles in the first cavity cannot enter the second cavity, that is, the problem of leakage at the connecting position of the connecting part and the box is avoided, so as to prevent the gas and conductive particles from leaking and causing the nearby normal batteries to be in thermal runaway.

[0008] In some embodiments, the connecting portion is a fixing hole provided in the sealing structure, the fixing hole being in communication with the second cavity, and the exhaust assembly is fixed to the box through cooperation of the fixing hole and the connecting member.

[0009] The fixing hole is provided on the side of the second cavity away from the first cavity, and when the connecting member penetrates into the fixing hole from the box, the part of the connecting member penetrating out of the fixing hole can be located in the second cavity without entering the first cavity, so that the second cavity can accommodate the connecting member, and the high-temperature and high-pressure gas and the conductive particles in the first cavity are prevented from entering the second cavity, thereby preventing the thermoelectric separation phenomenon.

[0010] In some embodiments, a partition is provided in the exhaust portion, and the first cavity is separated from the second cavity by the partition.

[0011] The partition can be provided at a position close to the top and / or the bottom of the exhaust assembly in the height direction of the exhaust assembly, so that the second cavity formed on one side of the partition can accommodate the connecting member, and the other side of the partition can form a first cavity with a larger space, which is beneficial to improve the exhaust efficiency.

[0012] In some embodiments, one end of the sealing structure is fixed to the exhaust portion, and the other end of the sealing structure away from the exhaust portion is provided with the connecting portion. The sealing structure and the exhaust portion are separated from each other, so that the high-temperature and high-pressure gas and the conductive particles in the exhaust portion are prevented from being discharged into the sealing structure.

[0013] In some embodiments, the exhaust portion and the sealing structure are integrally formed. Thus, the structural integration of the exhaust assembly can be realized, and the structural reliability can be improved.

[0014] In some embodiments, the sealing structure includes a sealing ring or a sealing glue, and the sealing ring or the sealing glue is sealingly provided at the connecting position of the connecting portion and the box. Thus, the cooperation gap between the screw and the fixing hole can be sealed by the sealing ring or the sealing glue, and the gas leakage can be further prevented.

[0015] In some embodiments, a reinforcing rib is provided in the exhaust portion, and the reinforcing rib separates the inner wall of the exhaust portion into at least two first cavities. The reinforcing rib can strengthen the overall structure of the exhaust portion, ensure the structural reliability, improve the bearing capacity of the exhaust portion to the ejected high-pressure gas, and prolong the service life.

[0016] In some embodiments, the exhaust part further has a third cavity arranged between the first cavity and the second cavity, and a through hole is arranged on the side wall of the third cavity, and the first cavity communicates with the third cavity through the through hole. By arranging the third cavity, part of the gas in the first cavity can flow into the third cavity through the through hole, so that the exhaust assembly can exhaust gas through the first cavity and the third cavity together, thereby reducing the burden of the exhaust assembly and improving the exhaust efficiency.

[0017] In some embodiments, the exhaust part is provided with a fireproof member. The fireproof member can be arranged at a position opposite to the explosion-proof valve of the battery. When the battery is in thermal runaway and releases fluids such as hot air and sparks through the explosion-proof valve, the fireproof member can prevent the fluids from directly impacting the inner wall of the exhaust part and causing damage to the exhaust part, and even fire combustion.

[0018] The second aspect of the present application also provides a battery pack, which comprises a box body and at least one battery monomer arranged in the box body, wherein the battery pack further comprises at least one exhaust assembly provided by the first aspect of the present application, the exhaust assembly is connected to the inner wall of the box body, and the battery monomer is arranged on at least one side of the exhaust assembly in the thickness direction.

[0019] In some embodiments, the exhaust assembly divides the box body into two or more containing spaces, and the battery monomer is arranged in the containing space.

[0020] In some embodiments, the exhaust assembly is welded, riveted or screwed to the box body. Thus, the assembly of the exhaust assembly can be facilitated, and the reliability of the connection between the exhaust assembly and the box body can be improved.

[0021] In some embodiments, the box body further comprises a first part and / or a second part, and the exhaust assembly is connected to the first part and / or the second part through the connecting part. Thus, the flexibility of the connection between the exhaust assembly and the box body can be improved, and appropriate connection modes can be selected according to different exhaust scenarios, thereby improving the versatility of the exhaust assembly.

[0022] In some embodiments, a gas passage is arranged inside the side wall of the box body and / or inside the second part, and the gas passage communicates with the exhaust part.

[0023] In some embodiments, the box body is provided with an exhaust valve, and the exhaust valve communicates with the gas outlet of the gas passage.

[0024] When the box is provided with a gas passage capable of communicating with the exhaust part, the exhaust valve can be connected with the gas outlet of the gas passage and can control the opening and closing of the gas outlet, so that when exhaust is needed, the gas outlet can be opened by the exhaust valve to make the gas passage communicate with the external atmosphere, and when exhaust is not needed, the gas outlet can be closed to realize sealing and prevent external impurities from entering the gas passage.

[0025] The third aspect of the present application also provides a battery pack, comprising the battery pack provided in the second aspect of the present application.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0028] Figure 2 An exploded structural schematic diagram of a battery pack is provided for some embodiments of the present application;

[0029] Figure 3 An exploded structural schematic diagram of a battery cell is provided for some embodiments of the present application;

[0030] Figure 4 A schematic diagram of the application of the exhaust assembly in the battery pack is provided for the embodiments of the present application (I);

[0031] Figure 5 A schematic diagram of the application of the exhaust assembly in the battery pack is provided for the embodiments of the present application (II);

[0032] Figure 6 A schematic diagram of the application of the exhaust assembly in the battery pack is provided for the embodiments of the present application (III);

[0033] Figure 7 A schematic diagram of the application of the exhaust assembly in the battery pack is provided for the embodiments of the present application (IV);

[0034] Figure 8 A Figure 4 An enlarged view at A in FIG. 8;

[0035] Figure 9 A side view of the application of the exhaust assembly in the battery pack is provided for the embodiments of the present application;

[0036] Figure 10 A schematic diagram of the connection of the exhaust assembly with the box (I);

[0037] Figure 11 A schematic diagram of the connection of the exhaust assembly with the box (II).

[0038] Reference Signs:

[0039] 100 - battery pack

[0040] 1 - box

[0041] 11 - first part

[0042] 12 - second part

[0043] 2 - battery cell

[0044] 21 - end cover

[0045] 22 - shell

[0046] 23 - battery cell assembly

[0047] 3 - exhaust assembly

[0048] 31 - connecting part

[0049] 32 - exhaust part

[0050] 321 - first cavity

[0051] 321a - exhaust hole

[0052] 322 - third cavity

[0053] 322a - through hole

[0054] 323 - reinforcing rib

[0055] 324 - partition

[0056] 33 - sealing structure

[0057] 331 - second cavity

[0058] 4 - connecting piece

[0059] 1000 - vehicle

[0060] 1100 - controller

[0061] 1200 - motor

[0062] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. DETAILED DESCRIPTION

[0063] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used in the present application 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 of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, not to describe a specific order or primary and secondary relationship.

[0065] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0066] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists, A and B exist, and B exists. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0068] In the present application, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0069] From the development of market situation, power battery as the main storage energy device is more and more widely used, not only be applied to the water, fire, wind and solar power station and other energy storage power system, but also be widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as military equipment and aerospace and other fields.

[0070] The application provides a battery pack 100, which comprises a plurality of energy modules, each of which can provide electrical energy to ensure that the battery meets the actual power supply demand. The energy module comprises at least one battery monomer 2, that is, one energy module can be composed of one battery monomer, or two, three or more battery monomers can be connected in series or parallel or mixed connection to form an energy module. The mixed connection means that there are both series and parallel connections among the plurality of battery monomers.

[0071] The plurality of energy modules in the battery can be connected in series, parallel or mixed connection. The mixed connection means that there are both series and parallel connections among the plurality of energy modules. Among them, the plurality of energy modules can be connected in series to form an energy module to obtain higher voltage. The battery further comprises a module frame and a module frame, wherein each energy module is provided with a module frame, and the module frame is connected with the energy module to fix the energy module; a plurality of module frames are connected together on a module frame to fix the plurality of module frames, at this time, the battery becomes a complete whole structure.

[0072] In order to ensure that the structure strength of the module frame and the module frame meets the use demand, the module frame and the module frame are usually made of metal material, for example, the material of the module frame and the module frame can be steel or aluminum alloy. An insulating film is arranged between the energy module and the module frame to prevent the module frame from conducting electricity and causing safety hazards.

[0073] When the battery is in normal operation, it can stably and safely continuously provide electrical energy for the equipment. However, when the battery is in an abnormal operating state, such as misuse, short circuit, over rate and other abnormal use conditions, the energy module inside the battery will cause thermal runaway. When the energy module causes thermal runaway, high-temperature and high-pressure gas and conductive particles will be sprayed out, which will cause the insulating film between the thermal runaway energy module and the corresponding module frame to be damaged, that is, the insulation fails, and then the thermal runaway energy module and the corresponding module frame are connected, so that the corresponding module frame is electrified. Moreover, since the module frame is connected with the module frame, the thermal runaway energy module, the corresponding module frame and the module frame are connected, at this time, the energy module, the corresponding module frame and the module frame maintain the same potential. At the same time, since the module frame corresponding to each normal energy module is connected with the module frame, the module frame corresponding to each normal energy module is also electrified, and the module frame corresponding to the normal energy module and the module frame maintain the same potential.

[0074] Other normal energy modules generate a potential difference with the corresponding charged module frame and charged module frame, and due to the sequential connection between multiple energy modules, the voltage of the energy modules in the series connection path is sequentially superimposed to form a high-voltage system. Therefore, in the series connection path, the farther the normal energy module corresponding to the position from the energy module that has thermal runaway, the higher the voltage at the position, so that the normal energy module generates a larger potential difference with the charged module frame and the charged module frame at the position. When the potential difference exceeds the critical value, the high voltage will break down the electrical gap between the energy module and the module frame or the module frame, thereby generating an arc; when the arc occurs, a spark will be generated, thereby generating a dangerous level of thermal energy and mechanical energy (explosion sound, air wave, shock wave, etc.), which may break down other normal energy modules, cause more thermal runaway and insulation failure, accelerate the spread of heat inside the battery, and further cause the battery to catch fire or explode.

[0075] Based on the above considerations, in order to solve the problem of insulation failure caused by thermal runaway of energy modules and the resulting arc phenomenon, the prior art generally uses an exhaust beam to direct the high-temperature and high-pressure gas and conductive particles ejected by the thermal runaway battery to be discharged. However, the exhaust beam needs to be connected to the box of the battery pack by screws or other connecting members. Installation gaps inevitably occur at the positions connected by screws. Such installation gaps can cause high-temperature and high-pressure gas and conductive particles to leak and flow to surrounding normal batteries, thereby causing the risk of thermal runaway of normal batteries.

[0076] Therefore, the inventor has designed a new exhaust assembly 3 after deep research. The exhaust assembly 3 includes an exhaust part 32, a connecting part 31, and a sealing structure 33. The exhaust part 32 is used to receive exhaust from the battery monomer. The exhaust assembly 3 is connected to the box 1 of the battery pack through the connecting part 31, and the sealing structure 33 is arranged at the connecting position of the connecting part 31 and the box 1.

[0077] The exhaust from the battery monomer can be high-temperature and high-pressure gas and conductive particles. The high-temperature and high-pressure gas and conductive particles ejected by the thermal runaway battery monomer 2 can enter the exhaust part 32 and be directed to be discharged to the outside of the battery pack through the exhaust part 32. The connecting part 31 can be connected to the box 1 of the battery pack by bolts or other connecting members 4. The sealing structure 33 can seal the gap at the connecting position of the connecting part 31 and the box 1, thereby avoiding gas leakage and preventing the problem of thermal runaway of surrounding normal battery monomers 2.

[0078] The battery pack 100 disclosed in the embodiments of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship, or an aircraft. The power supply system of the electric device can be composed of the battery monomer 2, the battery pack 100, and the like disclosed in the present application. In this way, the risk of thermal runaway of the battery pack 100 can be reduced, thereby improving the safety of the battery pack 100.

[0079] The embodiments of the present application provide a power consumption device using the battery pack 100 as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0080] The following embodiments are described by taking a power consumption device of an embodiment of the present application as a vehicle 1000 for convenience of description.

[0081] Please refer to Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile. The vehicle 1000 is internally provided with the battery pack 100. The battery pack 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery pack 100 can be used for power supply of the vehicle 1000. For example, the battery pack 100 can be used as an 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 pack 100 to supply power to the motor 300. For example, the controller 200 is used for power consumption demand of the vehicle 1000 during starting, navigation, and driving.

[0082] In some embodiments of the present application, the battery pack 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0083] As Figure 2As shown, the battery pack 100 provided by the present application includes a box body 1 and battery monomers 2, and the battery monomers 2 are accommodated in the box body 1. The box body 1 is used to provide an accommodation space for the battery monomers 2, and the box body 1 can adopt various structures. In some embodiments, the box body 1 can include a first part 11 and a second part 12, and the first part 11 and the second part 12 are mutually covered to jointly define an accommodation space for accommodating the battery monomers 2. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, which is covered on the open side of the second part 12 to jointly define the accommodation space with the second part 12. The first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the box body 1 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0084] In the battery pack 100, the battery monomers 2 can be multiple, and the multiple battery monomers 2 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple battery monomers 2 are connected in series and in parallel. The multiple battery monomers 2 can be directly connected in series, in parallel, or in a mixed manner, and then the whole of the multiple battery monomers 2 is accommodated in the box body 1. Of course, the battery pack 100 can also be that the multiple battery monomers 2 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box body 1. The battery pack 100 can also include other structures, for example, the battery pack 100 can also include a current collecting component for realizing the electrical connection between the multiple battery monomers 2.

[0085] The battery monomer 2 in the present application can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiments of the present application are not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc., and the embodiments of the present application are not limited thereto. The battery monomer is generally divided into three types according to the packaging manner: cylindrical battery monomers, square battery monomers, and soft package battery monomers, and the embodiments of the present application are not limited thereto.

[0086] Please refer to Figure 3 , Figure 3 The exploded structural view of the battery monomer 20 provided by some embodiments of the present application is shown. The battery monomer 2 refers to the smallest unit that constitutes a battery. As shown, the battery monomer 2 includes an end cover 21, a shell 22, a cell assembly 23, and other functional components. Figure 3

[0087] ​The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery monomer 2 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Alternatively, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is not easily deformed when subjected to extrusion collision, so that the battery monomer 2 can have higher structural strength, and the safety performance can also be improved. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery monomer 2 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0088] The shell 22 is a component for fitting the end cover 21 to form the internal environment of the battery monomer 2, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is covered on the opening to form the internal environment of the battery monomer 2. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 22, the end cover 21 is covered on the shell 22. The shell 22 can be various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations.

[0089] As shown in Figures 4 to 7 The battery pack provided by the present application also includes a box body 1 and at least one exhaust assembly 3, and the battery monomer 2 and the exhaust assembly 3 can be arranged in the box body 1, the exhaust assembly 3 is connected to the inner wall of the box body 1, and the battery monomer 2 is arranged on at least one side of the exhaust assembly 3 in the thickness direction. The exhaust assembly 3 can separate the box body 1 into multiple spaces for accommodating the battery monomer 2 or the battery monomer 2 module, the explosion-proof valve on the battery monomer 2 can communicate with the exhaust part 32 of the exhaust assembly 3, when the battery monomer 2 fails, high-temperature and high-pressure gas and conductive particles can be discharged to the exhaust part 32 through the explosion-proof valve, and the exhaust part 32 can directionally discharge the received high-temperature and high-pressure gas and conductive particles.

[0090] The application provides a power consumption device using the battery pack 100 as a power supply, which can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0091] Specifically, as shown in Figure 8 , the exhaust part 32 is provided with a first cavity 321, and the side wall of the first cavity 321 is provided with an exhaust hole 321a for cooperating with the battery monomer.

[0092] The exhaust part 32 can be a plate-shaped structure of a rectangular parallelepiped, and the first cavity 321 inside can pass through both ends in the length direction, or can not pass through. Specifically, as shown in Figure 10 , when the battery pack has a cavity for exhaust in the side wall of the box body 1, the first cavity 321 can pass through both ends in the length direction of the exhaust part 32 to communicate with the cavity inside the box body 1. As shown in Figure 2 and Figure 11 , when the battery pack has no cavity for exhaust in the side wall of the box body 1, but has a cavity for exhaust in the first part 11 or the second part 12 of the box body 1, both ends of the first cavity 321 can not pass through both ends in the length direction of the exhaust part 32, but an exhaust port is provided at the top or bottom of the exhaust part 32, which can communicate with the cavity in the first part 11 or the second part 12 of the box body 1 to exhaust. When the battery monomer 2 fails, the high-temperature and high-pressure gas and conductive particles discharged by the battery monomer 2 can enter the first cavity 321 through the exhaust hole 321a, so that they can be discharged outside the battery pack through the first cavity 321.

[0093] Specifically, as shown in Figure 8 , the sealing structure 33 includes a second cavity 331, the second cavity 331 is not communicated with the first cavity 321, and the connecting part 31 is formed in the sealing structure 33.

[0094] When the exhaust assembly 3 is installed on the box body 1 of the battery pack, it can be fixed to the box body 1 through the connecting part 31. Since the connecting part 31 is formed in the sealing structure 33, i.e. the connecting part 31 is part of the sealing structure 33, after the connecting part 31 is connected with the box body 1, the second cavity 331 can be aligned with the connecting part 31 and the position where the box body 1 cooperates, since the first cavity and the second cavity 331 are not communicated with each other, the high-temperature and high-pressure gas and conductive particles in the first cavity cannot enter the second cavity 331, i.e. cannot leak through the position where the connecting part 31 cooperates with the box body 1, thereby preventing the gas and conductive particles from leaking and causing the nearby normal battery monomer 2 to heat runaway.

[0095] Specifically, the connecting part 31 is a fixing hole provided on the sealing structure 33, the fixing hole is in communication with the second cavity 331, and the exhaust assembly 3 is fixed to the box body 1 through cooperation of the fixing hole and the connecting part 4.

[0096] The connecting part 4 can be a bolt, a screw, a rivet, a buckle or the like, so that the exhaust assembly 3 can be assembled. The fixing hole is arranged on the side of the second cavity 331 away from the first cavity 321. When the connecting part 4 penetrates into the fixing hole from the box body 1, the part of the connecting part 4 penetrating out of the fixing hole can be located in the second cavity 331, without entering the first cavity 321. Thus, the second cavity 331 can accommodate the connecting part 4, and can prevent the high-temperature and high-pressure gas and the conductive particles in the first cavity 321 from entering the second cavity 331, thereby preventing the thermoelectric separation phenomenon.

[0097] Specifically, as shown in Figure 8 The first cavity 321 is separated from the second cavity 331 by the partition part 324.

[0098] The partition part 324 can be a flat plate structure and can extend in the length direction of the exhaust assembly 3. The partition part 324 can be arranged at the position close to the top and / or the bottom of the exhaust assembly 3 in the height direction of the exhaust assembly 3, so that the second cavity 331 formed on one side of the partition part 324 can accommodate the connecting part 4, and the other side of the partition part 324 can form the first cavity 321 with a larger space, which is beneficial to improve the exhaust efficiency.

[0099] Specifically, one end of the sealing structure 33 is fixed to the exhaust part 32, and the other end of the sealing structure 33 away from the exhaust part 32 is provided with the connecting part 31.

[0100] The sealing structure 33 can be a separate structure, one end of the sealing structure 33 can be fixed to the exhaust part 32 through the connecting part 4 such as a bolt, a screw, a rivet or a buckle, and the other end of the sealing structure 33 can also be fixed to the box body 1 through the connecting part 4. The sealing structure 33 is separated from the exhaust part 32, so that the high-temperature and high-pressure gas and the conductive particles in the exhaust part 32 cannot be discharged into the sealing structure 33. The sealing structure 33 can also be connected to the box body 1 by welding, bonding or the like.

[0101] Specifically, the exhaust part 32 and the sealing structure 33 can be integrally formed. That is, the sealing structure 33 can be directly formed during the forming of the exhaust part 32, so that the structure of the exhaust assembly 3 can be integrated, and the structural reliability can be improved.

[0102] Specifically, the sealing structure 33 can include a sealing ring or sealing glue, which is arranged at the connecting position of the connecting part 31 and the box body 1. When the connecting part 4 is screwed into the fixing hole, the nut of the screw can press the sealing ring or sealing glue on the box body 1 or at the position around the fixing hole, so that the cooperation gap between the screw and the fixing hole can be sealed by the sealing ring or sealing glue, and further gas leakage can be prevented. Of course, the sealing structure 33 can also include other sealing members made of heat-resistant materials or insulating materials.

[0103] Specifically, as shown in Figure 8 and Figure 9 , the exhaust part 32 is provided with a reinforcing rib 323, which divides the inner wall of the exhaust part 32 into at least two first cavities 321.

[0104] Wherein, when the exhaust part 32 is formed, the reinforcing rib 323 can be integrally formed, which can strengthen the overall structure of the exhaust part 32, ensure the structural reliability, improve the bearing capacity of the exhaust part 32 to the high-pressure gas ejected, and prolong the service life. In an embodiment, the reinforcing rib 323 can divide the exhaust assembly 3 into two first cavities in the thickness direction, so that the high-temperature and high-pressure gas ejected by the battery monomer 2 on both sides of the exhaust assembly 3 can be exhausted through the two first cavities, and the influence of the high-temperature and high-pressure gas on one side on the battery monomer 2 on the other side can be prevented.

[0105] Specifically, the exhaust part 32 is further provided with a third cavity 322, which is arranged between the first cavity 321 and the second cavity 331, and the side wall of the third cavity 322 is provided with a through hole 322a, and the third cavity 322 communicates with the first cavity 321 through the through hole 322a.

[0106] When there is too much high-temperature and high-pressure gas in the first cavity 321, it will cause great burden to the overall exhaust assembly 3, for example, the gas cannot be exhausted in time, and the excessive accumulation of high-temperature and high-pressure gas will cause excessive pressure on the inner wall of the first cavity 321, which is easy to cause deformation and damage of the exhaust assembly 3, and reduce the service life. Therefore, in the embodiment, by arranging the third cavity 322, part of the gas in the first cavity 321 can flow into the third cavity 322 through the through hole 322a, so that the exhaust can be realized through the first cavity 321 and the third cavity 322, the burden of the exhaust assembly 3 is reduced, and the exhaust efficiency is improved.

[0107] Specifically, the exhaust part 32 is provided with a fireproof member. The fireproof member can be arranged at a position opposite to the explosion-proof valve of the battery monomer 2, so that when the battery monomer 2 occurs thermal runaway and releases hot air and fire sparks through the explosion-proof valve, the fluid can be prevented from directly impacting the inner wall of the exhaust part 32, causing damage to the exhaust part 32, and even causing fire combustion.

[0108] The fireproof member can be made of a material with a high melting point, so that the fire will not melt the fireproof member. Specifically, the material of the fireproof member in this embodiment is mica, which has a very high melting point (about 1723 DEG C), so that the fireproof member can meet the fire resistance requirement. In addition, the mica plate has excellent processing performance. However, the application is not limited to the embodiment of mica.

[0109] The battery pack according to some embodiments of the application also includes a box body 1 and at least one battery cell 2. The battery cell 2 is arranged in the box body 1, and an exhaust assembly 3 is connected to the inner wall of the box body 1. The battery cell 2 is arranged on at least one side of the exhaust assembly 3 in the thickness direction. The exhaust assembly 3 can be welded, riveted or screwed to the box body 1, so that the assembly of the exhaust assembly 3 can be facilitated, and the reliability of the connection between the exhaust assembly 3 and the box body 1 can be improved.

[0110] Specifically, as shown in Figures 4 to 7 The box body 1 of the battery pack also includes a first part 11 and / or a second part 12. The exhaust assembly 3 is connected to the first part 11 and / or the second part 12 through a connecting part 31. Thus, the flexibility of the connection between the exhaust assembly 3 and the box body 1 can be improved, and the exhaust assembly 3 can be selected according to different exhaust scenarios, so that the versatility of the exhaust assembly 3 is improved.

[0111] The inner wall of the box body 1 and / or the inner part of the second part 12 is provided with a gas passage, which is in communication with the exhaust part 32. That is, the inner part of the first part 11 or the second part 12 can be provided with a cavity for gas flow. When the exhaust assembly 3 is connected to the first part 11 or the second part 12 through the connecting part 31, the exhaust part 32 can be in communication with the cavity in the first part 11 or the second part 12. The gas discharged from the exhaust part 32 can enter the cavity in the first part 11 or the second part 12, and can be further discharged to the outside of the battery pack through the cavity in the first part 11 or the second part 12.

[0112] Specifically, the box body can also be provided with an exhaust valve. When the box body is provided with a gas passage in communication with the exhaust part, the exhaust valve can be connected to the gas outlet of the gas passage, and can control the opening and closing of the gas outlet of the gas passage. Thus, when external exhaust is needed, the gas outlet can be opened through the exhaust valve, so that the gas passage is in communication with the external atmosphere. When exhaust is not needed, the gas outlet can be closed to achieve sealing, so that external impurities cannot enter the gas passage.

[0113] According to some embodiments of the application, the application also provides a power consumption device, which includes the battery pack according to any one of the above-mentioned embodiments, and the battery pack is used to provide electric energy for the power consumption device.

[0114] According to some embodiments of the application, as shown inFigure 7 and Figure 8 The application provides an exhaust assembly arranged in the battery pack 100, which can separate the battery pack 100 into two or more accommodation spaces for accommodating the battery monomer 2. The exhaust assembly is provided with a first cavity 321, a second cavity 331 and a third cavity 322, the third cavity 322 is arranged between the first cavity 321 and the second cavity 331, the battery monomer 2 can be arranged on both sides of the exhaust assembly and can be communicated with the corresponding first cavity 321 through the respective explosion-proof valve, the battery monomer 2 in thermal runaway can discharge high-temperature and high-pressure gas and conductive particles into the first cavity 321, and the first cavity 321 can discharge the gas to the outside of the battery pack 100. Meanwhile, the third cavity 322 is communicated with the first cavity 321 through the through hole 322a, which can improve the gas discharge efficiency and the safety of the exhaust. The second cavity 331 is arranged at both ends of the exhaust assembly in the height direction, and the end of the second cavity 331 away from the first cavity 321 can be fixed on the box body 1 of the battery pack 100 through the connecting member such as a screw, and the second cavity 331 is not communicated with the first cavity 321 and the third cavity 322, so that the gas in the first cavity 321 or the third cavity 322 cannot enter the second cavity 331, thereby preventing the gas leakage at the fastening position of the connecting member.

[0115] The above only describes the preferred embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An exhaust assembly characterized by, The exhaust assembly comprises an exhaust part, a connecting part and a sealing structure, the exhaust part is used for receiving exhaust from a battery monomer, and a fireproof part is arranged in the exhaust part; The exhaust assembly is connected to a box of a battery pack through the connecting part, and the sealing structure is arranged at a connecting position of the connecting part and the box.

2. The exhaust assembly of claim 1, wherein, A first cavity is arranged in the exhaust part, and a side wall of the first cavity is provided with an exhaust hole used for cooperating with the battery monomer.

3. The exhaust assembly of claim 2, wherein, The sealing structure comprises a second cavity, the second cavity is not communicated with the first cavity, and the connecting part is formed in the sealing structure.

4. The exhaust assembly of claim 3, wherein, The connecting part is a fixing hole arranged in the sealing structure, the fixing hole is communicated with the second cavity, and the exhaust assembly is fixed to the box through cooperation of the fixing hole and a connecting piece.

5. The exhaust assembly of claim 3, wherein, A partition part is arranged in the exhaust part, and the first cavity is separated from the second cavity through the partition part.

6. The exhaust assembly of claim 1, wherein, One end of the sealing structure is fixed to the exhaust part, and the other end of the sealing structure away from the exhaust part is provided with the connecting part.

7. The exhaust assembly of any one of claims 1-6, wherein, The exhaust part and the sealing structure are integrally formed.

8. The exhaust assembly of any one of claims 1-6, wherein, The sealing structure comprises a sealing ring or a sealing glue, and the sealing ring or the sealing glue is sealingly arranged at the connecting position of the connecting part and the box.

9. The exhaust assembly of any of claims 2-6, wherein, A reinforcing rib is arranged in the exhaust part, and the reinforcing rib separates an inner wall of the exhaust part into at least two first cavities.

10. The exhaust assembly of any of claims 3-5, wherein, A third cavity is further arranged in the exhaust part, the third cavity is arranged between the first cavity and the second cavity, a side wall of the third cavity is provided with a through hole, and the third cavity is communicated with the first cavity through the through hole.

11. A battery pack comprising a case and at least one battery cell disposed within the case, characterized by, The battery pack further comprises at least one exhaust assembly according to any one of claims 1-10, the exhaust assembly is connected to an inner wall of the box, and the battery monomer is arranged on at least one side of the exhaust assembly in a thickness direction.

12. The battery pack of claim 11, wherein, The exhaust assembly separates the box into two or more containing spaces, and the battery monomer is arranged in the containing spaces.

13. The battery pack of claim 11, wherein, The exhaust assembly is welded, riveted or screwed to the box.

14. The battery pack of claim 11, wherein, The box further comprises a first part and / or a second part, the first part covers the second part, and the exhaust assembly is connected to the first part and / or the second part through the connecting part.

15. The battery pack of claim 14, wherein, An inner wall of a side wall of the box and / or an inner wall of the second part is provided with a gas passage, and the gas passage is communicated with the exhaust part.

16. The battery pack of claim 15, wherein, The box is provided with an exhaust valve, and the exhaust valve is communicated with an air outlet of the gas passage.

17. An electrical device, comprising: The battery pack comprises the battery pack according to any one of claims 11-16.

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