Protective exhaust assembly, battery pack and electric device

Abstract

The utility model discloses a protective exhaust assembly, a battery pack and an electric device, the protective exhaust assembly is used for the battery pack and comprises an expansion piece and a protective support piece, the expansion piece is suitable for being opposite to a battery and arranged in a propping manner, and at least one accommodating cavity is defined in the expansion piece; at least one containing cavity is provided with a protection supporting piece, an exhaust channel is defined in the protection supporting piece, and the exhaust channel is suitable for being communicated with an anti-explosion valve of the battery. According to the protective exhaust assembly disclosed by the embodiment of the utility model, the safety of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a protective exhaust component, a battery pack and an electrical device. Background Art

[0002] At present, thermal runaway problems frequently occur in electrical devices such as new energy vehicles. Thermal runaway can lead to property losses and safety problems. Therefore, how to reduce or avoid the occurrence of thermal runaway and how to avoid safety problems in battery packs are still the most important issues for batteries. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a protective exhaust assembly, which can improve the safety of the battery pack.

[0004] The utility model also provides a battery pack having the protective exhaust assembly.

[0005] The utility model also provides an electrical device having the battery pack.

[0006] According to the protective exhaust assembly of the first aspect of the utility model, the protective exhaust assembly is used for a battery pack and includes: an expansion piece, the expansion piece is suitable for being opposite to the battery and being set to abut against it, and at least one accommodating cavity is defined in the expansion piece; a protective support piece, at least one of the accommodating cavities is provided with the protective support piece, and an exhaust channel is defined in the protective support piece, and the exhaust channel is suitable for being connected to the explosion-proof valve of the battery.

[0007] According to the protective exhaust assembly of the embodiment of the utility model, by arranging a protective support member in the accommodating chamber, when thermal runaway occurs in the battery, the protective support member can separate the high-temperature gas and the cavity wall of the accommodating chamber to reduce the risk that the accommodating chamber is easily damaged by the high-temperature gas when thermal runaway occurs; at the same time, the protective support member has good structural strength relative to the expansion member, so that when the expansion member is subjected to the expansion force of the battery, the deformation of the protective support member is small or basically not deformed, and the protective support member can play a good supporting role for the expansion member to improve the structural stability of the exhaust channel and the accommodating chamber, so that the exhaust channel always remains connected when the battery expands, and the exhaust smoothness is improved, which is beneficial to improving the structural stability and carrying capacity of the protective exhaust assembly, and can prevent other batteries from contacting with the high-temperature gas and continuing to cause more batteries to experience thermal runaway, slow down the speed of heat spread, and enable the battery management system to have sufficient response time so that the power line of the battery can be cut off in time, thereby improving the safety of the battery pack.

[0008] In some embodiments, the expansion member extends into a long strip shape, a width side of the expansion member is suitable for being arranged opposite to the battery, and the accommodating cavity extends along the length direction of the expansion member to pass through both ends of the length of the expansion member.

[0009] In some embodiments, in the height direction of the expansion member, the central axis of the accommodating cavity is disposed offset from the height center of the expansion member.

[0010] In some embodiments, there are multiple accommodating cavities, and the multiple accommodating cavities are arranged at intervals along the height direction and / or width direction of the expansion member.

[0011] In some embodiments, at least two of the plurality of accommodating cavities are respectively provided with the protective support member.

[0012] In some embodiments, the expansion member defines a honeycomb structure, which includes a plurality of cavities, the shape of the cavities enclosed by the peripheral walls is a prism or a pyramid, and the central axis of the cavity extends along the width direction of the expansion member.

[0013] In some embodiments, the expansion member and the protective support member are connected by injection molding.

[0014] In some embodiments, the expansion member is a plastic member, and the protective support member is a metal member, a ceramic member, a composite material member, or a mica member.

[0015] In some embodiments, the expansion member further defines an installation cavity, the installation cavity is spaced apart from the accommodating cavity, and the protective exhaust assembly further includes: a connecting row, the connecting row is suitable for being electrically connected to the battery, and a portion of the connecting row is fixed to the installation cavity.

[0016] In some embodiments, the expansion member extends into a long strip shape, a width side of the expansion member is suitable for being arranged opposite to the battery, and the installation cavity extends along the length direction of the expansion member to pass through both ends of the length of the expansion member.

[0017] In some embodiments, the width side of the expansion member is a first side, and in the width direction of the expansion member, the central axis of the mounting cavity is located at a side of the width center of the expansion member that is away from the first side; and / or, in the width direction of the expansion member, the connecting row is arranged adjacent to the cavity wall of the mounting cavity that is away from the first side.

[0018] In some embodiments, there are multiple accommodating cavities, and in the height direction of the expansion member, at least one accommodating cavity is provided on both sides of the installation cavity, and the accommodating cavities on both sides of the installation cavity are respectively located on both sides of the height center of the expansion member.

[0019] In some embodiments, the width side of the installation cavity facing the expansion member is open to form an opening, and the connecting row is suitable for fitting into the installation cavity through the opening.

[0020] A battery pack according to an embodiment of the second aspect of the utility model comprises: a tray, which defines a accommodating cavity; a battery and a protective exhaust assembly, wherein the protective exhaust assembly is the protective exhaust assembly according to the embodiment of the first aspect of the utility model, the protective exhaust assembly and the battery are both arranged in the accommodating cavity, and at least one length end of the protective exhaust assembly is spaced from the cavity wall of the accommodating cavity to define a connecting channel, and the connecting channel connects the exhaust channel and the explosion-proof valve of the battery.

[0021] According to the battery pack of the embodiment of the utility model, the safety of the battery pack can be improved by adopting the above-mentioned protective exhaust assembly.

[0022] The electrical device according to the embodiment of the third aspect of the utility model comprises the battery pack according to the embodiment of the second aspect of the utility model.

[0023] According to the electric device of the embodiment of the utility model, the safety of the electric device can be improved by adopting the above-mentioned battery pack.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of a protective exhaust assembly according to some embodiments of the present utility model;

[0027] Figure 2 yes Figure 1 Another schematic diagram of the protective exhaust assembly shown in;

[0028] Figure 3 is a schematic diagram of a protective support member according to some embodiments of the utility model;

[0029] Figure 4 yes Figure 1 Another schematic diagram of the protective exhaust assembly shown in ;

[0030] Figure 5 yes Figure 1 Still another schematic diagram of the protective exhaust assembly shown in ;

[0031] Figure 6 yes Figure 4 A cross-sectional view of the protective exhaust assembly shown in ;

[0032] Figure 7 is a partial schematic diagram of a battery pack according to some embodiments of the utility model;

[0033] Figure 8 yes Figure 7 A partial enlarged view of the battery pack shown in ;

[0034] Fig. 9 It is a partial schematic diagram of a battery pack according to some embodiments of the utility model.

[0035] Reference numerals:

[0036] Battery pack 200, tray 101, accommodating chamber 101a, connecting passage 102,

[0037] Protective exhaust assembly 100,

[0038] expansion member 1, cavity 1a, first side 1b, accommodating cavity 11, mounting cavity 12, opening 12a,

[0039] Protective support 2, exhaust channel 21,

[0040] Connect row 3. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0043] Hereinafter, with reference to the accompanying drawings, a protective exhaust assembly 100 according to an embodiment of the present invention will be described. The protective exhaust assembly 100 is used in a battery pack 200 to improve the safety of the battery pack 200.

[0044] like Figure 1 and Figure 2 As shown, the protective exhaust assembly 100 includes an expansion member 1 and a protective support member 2. The expansion member 1 is adapted to be opposite to the battery and abutted against the battery, so that the expansion member 1 is used to at least bear the expansion force of the battery, so that the expansion member 1 can absorb the expansion of the battery, reduce the extrusion force on the battery, and play a certain role in bearing and protection. Therefore, the expansion member 1 can adaptively absorb the expansion force of the battery to improve the safety of the battery.

[0045] It is understandable that the expansion member 1 can absorb a certain amount of impact energy. When the side of the battery pack 200 provided with the protective exhaust assembly 100 is impacted, the impact energy can be absorbed by the expansion member 1, thereby reducing the deformation of the battery and playing a role in protecting the battery.

[0046] Optionally, the expansion member 1 may be a non-metallic member, such as a rubber member or a plastic member.

[0047] Among them, at least one accommodating cavity 11 is defined in the expansion member 1, and the accommodating cavity 11 is suitable for connecting the inside and outside of the battery pack 200. At least one accommodating cavity 11 is provided with a protective support member 2, and an exhaust channel 21 is defined in the protective support member 2. The exhaust channel 21 is suitable for connecting with the explosion-proof valve of the battery. The exhaust channel 21 can be connected to the outside of the battery pack 200, so that the battery can discharge high-temperature exhaust substances through the explosion-proof valve when thermal runaway occurs in the battery, and the exhaust substances can be discharged to the outside of the battery pack 200 through the exhaust channel.

[0048] Therefore, by arranging the protective support member 2 in the accommodating chamber 11, when the battery has thermal runaway, the protective support member 2 can separate the high-temperature gas from the cavity wall of the accommodating chamber 11, so that the high-temperature gas does not contact the wall surface of the accommodating chamber 11, so as to reduce the risk of the accommodating chamber 11 being easily damaged by the high-temperature gas when thermal runaway occurs, which is conducive to improving the flexibility of material selection of the expansion member 1; at the same time, the protective support member 2 has good structural strength relative to the expansion member 1, so that when the expansion member 1 is subjected to the expansion force of the battery, the deformation of the protective support member 2 is small or basically not deformed, and the protective support member 2 can play a good supporting role for the expansion member 1, so as to improve the structural stability of the exhaust channel 21 and the accommodating chamber 11, and facilitate When the battery expands, the exhaust channel 21 always remains connected, which improves the exhaust smoothness and stability, reduces the risk of the exhaust channel 21 being blocked due to the battery expansion squeezing the exhaust channel 21, and is beneficial to improving the structural stability and carrying capacity of the protective exhaust assembly 100, so that the high-temperature gas generated by the battery when thermal runaway occurs can be discharged out of the battery pack 200 through the exhaust channel 21 in a timely manner, thereby preventing other batteries from contacting the high-temperature gas and continuing to cause more batteries to experience thermal runaway, slowing down the speed of heat spread, and allowing the battery management system (BMS) to have sufficient response time so that the battery power line can be cut off in time, thereby improving the safety of the battery pack 200.

[0049] It can be seen that the provision of the protective support member 2 can reduce the possibility of the expansion member 1 being crushed by the battery expansion force to a certain extent, thereby improving the reliability of the protective exhaust assembly 100.

[0050] It can be understood that a receiving cavity 11 is defined in the expansion member 1 , and the receiving cavity 11 is provided with a protective support member 2 ; when a plurality of receiving cavities 11 are defined in the expansion member 1 , at least one of the plurality of receiving cavities 11 is provided with a protective support member 2 .

[0051] Optionally, the cross-sectional shape of the accommodating cavity 11 is not limited. For example, the cross-sectional shape of the accommodating cavity 11 may be circular, elliptical, or square.

[0052] It is understandable that when there are multiple accommodating cavities 11, the arrangement of the multiple accommodating cavities 11 is not specifically limited; whether there are one or more accommodating cavities 11, for a single accommodating cavity 11, the position of the accommodating cavity 11 is not limited, for example, in the height direction of the expansion member 1 (for example Figure 1 In the vertical direction of the expansion member 1, the accommodating cavity 11 may be located at the end or the middle of the expansion member 1, and in the width direction of the expansion member 1 (for example Figure 1 In the left-right direction), the accommodating cavity 11 may be located at the end or the middle of the expansion member 1.

[0053] According to the protective exhaust assembly 100 of the embodiment of the utility model, by arranging the protective support member 2 in the accommodating chamber 11, when the battery has thermal runaway, the protective support member 2 can separate the high-temperature gas and the cavity wall of the accommodating chamber 11, so as to reduce the risk that the accommodating chamber 11 is easily damaged by the high-temperature gas when thermal runaway occurs; at the same time, the protective support member 2 has good structural strength relative to the expansion member 1, so that when the expansion member 1 is subjected to the expansion force of the battery, the deformation of the protective support member 2 is small or basically not deformed, and the protective support member 2 can play a good supporting role for the expansion member 1, so as to improve the structural stability of the exhaust channel 21 and the accommodating chamber 11, so that the exhaust channel 21 always remains connected when the battery expands, and the exhaust smoothness is improved, which is beneficial to improving the structural stability and carrying capacity of the protective exhaust assembly 100, and can prevent other batteries from contacting with the high-temperature gas to continue to cause more batteries to have thermal runaway, slow down the speed of heat spread, and enable the battery management system to have sufficient response time, so that the power line of the battery can be cut off in time, thereby improving the safety of the battery pack 200.

[0054] In some embodiments, Figure 1 and Figure 3 As shown, the expansion member 1 extends into a long strip, and the width side of the expansion member 1 is suitable for being arranged opposite to the battery. When the battery expands, the battery can expand along the width direction of the expansion member 1 (for example Figure 1The accommodating cavity 11 extends along the length direction of the expansion member 1 to both ends of the length of the expansion member 1, which is conducive to simplifying the assembly of the protective support member 2 and the expansion member 1; at the same time, it is convenient for the accommodating cavity 11 to have a sufficient length for setting the protective support member 2, so that the protective support member 2 can adapt to the size of the battery and the position of the explosion-proof valve, so that the exhaust channel 21 is suitable for communicating with the explosion-proof valve of the battery, and the high-temperature gas can be discharged out of the battery through the exhaust channel 21 in the event of thermal runaway.

[0055] In addition, when the number of accommodating cavities 11 is greater than the number of protective support members 2, the accommodating cavities 11 are suitable for being connected to the explosion-proof valve of the battery and connected to the outside of the battery pack 200. The accommodating cavities 11 without protective support members 2 can also be used as exhaust chambers to guide the exhaust substances of the battery from one end of the length of the accommodating cavities 11 to the other end so as to be discharged from the battery pack 200.

[0056] In some embodiments, Figure 1 As shown, in the height direction of the expansion member 1, the central axis of the accommodating cavity 11 is set away from the height center of the expansion member 1, and the position of the accommodating cavity 11 in the expansion member 1 can be deviated from the middle of the battery in the height direction of the expansion member 1, so that the accommodating cavity 11 deviates from the position where the battery volume expands the most (the middle of the battery), which can reduce the expansion force of the battery on the accommodating cavity 11, thereby reducing the expansion force of the battery on the protective support member 2. As a result, when the battery thermal runaway occurs, the risk of the battery expansion force damaging the accommodating cavity 11 and the protective support member 2 can be reduced. Even if the accommodating cavity 11 and the protective support member 2 are deformed under the action of the battery expansion force, since the accommodating cavity 11 and the protective support member 2 avoid the position where the battery expands the most, the deformation of the accommodating cavity 11 and the protective support member 2 can be reduced to a certain extent, so that the exhaust channel 21 always remains open to discharge the high-temperature gas generated by the battery thermal runaway out of the battery pack 200.

[0057] It can be understood that in the height direction of the expansion piece 1, the height of the expansion piece 1 and the battery are usually the same, so that the expansion piece 1 can adapt to the height of the battery to ensure reliable and complete cooperation. At the same time, the height center position of the expansion piece 1 corresponds to the middle of the battery in the height direction (the position where the battery expansion force is the largest), and the central axis of the accommodating cavity 11 deviates from the height center setting of the expansion piece 1, that is, the accommodating cavity 11 deviates from the middle of the battery in the height direction.

[0058] In some embodiments, in combination Figure 1 There are multiple accommodating cavities 11, and the multiple accommodating cavities 11 are arranged at intervals along the height direction and / or width direction of the expansion member 1.

[0059] 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, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] Therefore, the cooperation of multiple accommodating chambers 11 can improve the exhaust volume and exhaust efficiency of the protective exhaust assembly 100 to a certain extent, so that the high-temperature gas can be discharged from the battery pack 200 faster and in a shorter time, which can effectively reduce the intensity of thermal runaway, delay or inhibit the occurrence of thermal runaway of other batteries, and reduce the probability of heat diffusion to a certain extent, thereby improving the safety of the battery pack 200. Among them, at least one of the multiple accommodating chambers 11 is provided with a protective support 2. At this time, if the number of accommodating chambers 11 provided with protective support 2 is less than the total number of accommodating chambers 11, the high-temperature gas during the thermal runaway of the battery can be discharged through at least one accommodating chamber 11 and at least one exhaust channel 21; if each accommodating chamber 11 is provided with a protective support 2, the high-temperature gas during the thermal runaway of the battery can be discharged through multiple exhaust channels 21.

[0061] It can be understood that when the number of accommodating cavities 11 provided with protective support members 2 is less than the total number of accommodating cavities 11, even if the expansion member 1 is subjected to the expansion force of the battery and causes the accommodating cavities 11 without protective support members 2 to be deformed and blocked, high-temperature gas can still be discharged through the exhaust channel 21, thereby improving the safety of the battery pack 200.

[0062] In some embodiments, Figure 1 As shown, in the height direction of the expansion member 1, a plurality of accommodating cavities 11 are respectively located on both sides of the height of the expansion member 1, so that each accommodating cavity 11 deviates from the middle position in the height direction of the expansion member 1, so that the accommodating cavity 11 deviates from the position where the battery expansion volume is the largest (that is, the middle of the battery corresponds to the position of the middle of the expansion member 1), so as to reduce the expansion force applied to the accommodating cavity 11 when the battery expands, thereby reducing the risk of the accommodating cavity 11 being squeezed and damaged by the expansion force of the battery when the battery thermal runaway occurs, which is beneficial to improving the stability of the accommodating cavity 11, so that the high-temperature gas is stably discharged out of the battery through the accommodating cavity 11; in the width direction of the expansion member 1, a plurality of accommodating cavities 11 are located on the side of the expansion member 1 away from the battery, so that the width center of the accommodating cavity 11 is away from the battery, which can reduce the expansion force on the accommodating cavity 11 when the battery expands, thereby reducing the risk of the accommodating cavity 11 being squeezed and damaged by the expansion force of the battery when the battery thermal runaway occurs, which is beneficial to improving the stability of the accommodating cavity 11, so that the high-temperature gas is stably discharged out of the battery through the accommodating cavity 11.

[0063] In some embodiments, in combination Figure 1At least two of the multiple accommodating cavities 11 are respectively provided with protective support members 2, thereby, the accommodating cavity 11 provided with the protective support member 2 can discharge high-temperature gas through the exhaust channel 21. When the battery thermal runaway occurs, the battery pack 200 can discharge the high-temperature gas through at least two exhaust channels 21 to reduce the intensity of the thermal runaway, which is beneficial to delay or inhibit the continued occurrence of thermal runaway of other batteries and improve the safety of the battery pack 200.

[0064] In some embodiments, Figure 1 As shown, the expansion member 1 defines a honeycomb structure, which includes a plurality of cavities 1a, and the shape enclosed by the peripheral wall of each cavity 1a is a prism or a pyramid, and the central axis of the cavity 1a extends along the width direction of the expansion member 1. Thus, the structural strength of the expansion member 1 can be improved, and the expansion member 1 can be made to withstand more expansion force, which is conducive to reducing the risk of damage to the accommodating cavity 11 under the expansion force of the battery. At the same time, the expansion member 1 can be made to withstand more impact energy, which is conducive to reducing the damage to the battery caused by the impact, thereby improving the safety of the battery.

[0065] Optionally, for a single cavity 1a, the shape formed by the peripheral walls of the cavity 1a is a prism or a pyramid. It is understandable that the shapes formed by the peripheral walls of multiple cavities 1a can be the same or different. For example, the shape formed by the peripheral walls of all cavities 1a is a hexagonal prism; for another example, the shape formed by the peripheral walls of at least one of the multiple cavities 1a is a hexagonal prism, and the shape formed by the peripheral walls of at least one of the remaining cavities 1a is a quadrangular prism.

[0066] Of course, the structure of the expansion member 1 is not limited thereto; for example, the expansion member 1 may also be constructed such that a plurality of deformation cavities spaced apart are defined in the expansion member 1 , and each deformation cavity extends along the length direction of the expansion member 1 .

[0067] Optionally, the accommodating chamber 1 is connected to at least two of the multiple cavities 1a so that a portion of the protective support 2 is exposed to the corresponding cavity 1a, which is beneficial for saving the material of the protective exhaust component 100 while ensuring that the protective exhaust component 100 has suitable structural strength.

[0068] In some embodiments, Figure 1 As shown, the expansion member 1 and the protective support member 2 are injection-molded together, which can improve the connection strength between the protective support member 2 and the expansion member 1, so that the protective support member 2 and the expansion member 1 are better connected into an integrated structure, thereby improving the stability and structural strength of the protective exhaust assembly 100.

[0069] Among them, the expansion member 1 and the protective support member 2 are connected by injection molding, which can be understood as wrapping the entire protective support member 2 through an injection mold, and then forming the expansion member 1 through an injection molding process, so that the expansion member 1 is formed as an injection molded part, and the protective support member 2 is pre-embedded in the expansion member 1 as an insert.

[0070] In some embodiments, in combination Figure 1 , the protective support member 2 has better anti-deformation performance than the expansion member 1; and / or, the protective support member 2 has better high temperature resistance than the expansion member 1.

[0071] In some examples, combined Figure 1 If the anti-deformation performance of the protective support member 2 is better than that of the expansion member 1, then the protective support member 2 is arranged in the accommodating cavity 11, which can improve the structural strength of the accommodating cavity 11, so that the exhaust channel 21 can withstand a larger battery expansion force and improve the structural stability of the exhaust channel 21, so that the exhaust channel 21 can remain connected to discharge high-temperature gas when the battery has thermal runaway, thereby improving the safety of the battery pack 200.

[0072] In some examples, combined Figure 1 , the high temperature resistance of the protective support 2 is better than that of the expansion member 1. Therefore, the protective support 2 is arranged in the accommodating cavity 11, which can improve the high temperature resistance of the accommodating cavity 11, so that the exhaust channel 21 can withstand the high temperature gas and prevent the high temperature gas from damaging the accommodating cavity 11 (such as melting, etc.), thereby improving the performance of the protective scheduling component, improving the stability of the exhaust channel 21 and the stability of the exhaust efficiency, which is beneficial to slowing down the speed of thermal runaway of the battery, so that the battery management system has a suitable response time to cut off the battery power supply, thereby improving the safety of the battery pack 200.

[0073] In some embodiments, the expansion member 1 is a plastic member so that the expansion member 1 can better absorb the expansion force of the battery to adapt to the expansion of the battery, reduce the extrusion force on the battery, and protect the battery; the protective support member 2 is a metal member, a ceramic member, a composite material member or a mica member, so that the protective support member 2 has suitable structural strength and high temperature resistance. In addition, the protective support member 2 has a variety of options, which can adapt to the needs of the battery structure and the protective exhaust assembly 100 to select suitable materials and improve the safety of the battery pack 200.

[0074] In some embodiments, Figure 1 and Figure 7As shown, an installation cavity 12 is further defined in the expansion member 1, and the installation cavity 12 is spaced apart from the accommodating cavity 11. The protective exhaust assembly 100 also includes a connecting row 3, and the connecting row 3 is suitable for being electrically connected to the battery. A portion of the connecting row 3 is fixedly arranged in the installation cavity 12, so that a portion of the connecting row 3 is arranged in the installation cavity 12, which facilitates the arrangement and installation of the connecting row 3 and helps to save the occupied space of the protective exhaust assembly 100; at the same time, separating the installation cavity 12 and the accommodating cavity 11 can effectively prevent high-temperature gas from affecting the connecting row 3, thereby improving the safety of the connecting row 3.

[0075] Optionally, the installation cavity 12 is spaced apart from the accommodating cavity 11. When the spacing between the accommodating cavity 11 and the installation cavity 12 is less than a preset spacing, the electrical clearance between the protective support member 2 and the connecting row 3 is insufficient. The protective support member 2 may be a non-metallic member, such as a ceramic member, a non-metallic composite member, or a mica member. When the spacing between the accommodating cavity 11 and the installation cavity 12 is greater than or equal to a preset spacing, there is sufficient electrical clearance and creepage distance between the protective support member 2 and the connecting row 3. The protective support member 2 may be a metal member or a non-metal member. Of course, optionally, the connecting row 3 may also be insulated to avoid the risk of electrical breakdown or short circuit between the protective support member 2 and the connecting row 3 when the protective support member 2 is a metal member, which is beneficial to improving the safety of the battery pack 200.

[0076] In the embodiment of the present application, the material of the connecting bar 3 is not limited, for example, it can be copper or aluminum, etc.; the fixing method between the connecting bar 3 and the expansion member 1 is also not limited, for example, the connecting piece 3 and the expansion member 1 are fixed by snapping.

[0077] Optionally, combined Figure 7-Figure 9 The expansion member 1 can form a plurality of mounting cavities 12, and at least one of the plurality of mounting cavities 12 is provided with a connection row 3, which facilitates the arrangement of the connection row 3 to meet the requirements of battery electrical connection. Fig. 9 In the example, there are two mounting cavities 12 , and each mounting cavity 12 is provided with a corresponding connection row 3 .

[0078] In some technologies, an installation cavity is formed in the expansion member, and a connecting row is provided in the installation cavity. The gap between the connecting row and the installation cavity is usually used as an exhaust channel. However, the exhaust channel is easily damaged by the expansion force of the battery or high-temperature gas, etc., which may result in the high-temperature gas not being discharged in time, affecting the safety of the battery. In the embodiment of the present application, the expansion member 1 has an installation cavity 12 and a accommodating cavity 11, the installation cavity 12 is used to set the connecting row 3, and the accommodating cavity 11 is provided with a protective support member 2, which can avoid interference between the installation cavity 12 and the accommodating cavity 11; the protective support member 2 defines an exhaust channel 21, and the exhaust channel 21 is suitable for being connected to the explosion-proof valve of the battery, so that when the battery has thermal runaway, the high-temperature gas can be discharged from the battery through the exhaust channel 21 in time, and the protective support member 2 has good structural strength, which can play a good supporting role for the expansion member 1, so as to improve the structural stability of the exhaust channel 21 and the accommodating cavity 11, so as to facilitate the exhaust channel 21 to always remain connected when the battery expands, thereby improving the smoothness of exhaust, and the protective support member 2 has good high temperature resistance, so that the exhaust channel 21 can withstand high-temperature gas well, thereby improving the stable flow of the exhaust channel 21.

[0079] In some embodiments, Figure 1 As shown, the expansion member 1 extends into a long strip, and one side of the width of the expansion member 1 is suitable for being arranged opposite to the battery. Then, the above-mentioned width side of the expansion member 1 is suitable for directly or indirectly abutting against the battery, and when the battery expands, a force is applied to the expansion member 1 along the width direction of the expansion member 1; and the installation cavity 12 extends along the length direction of the expansion member 1 to both ends of the length of the expansion member 1, so that the installation cavity 12 has a suitable length, and it is convenient to set the connection row 3, so that the connection row 3 is suitable for connecting the battery and corresponding components (such as electrical equipment, etc.), and at the same time, the extension direction of the connection row 3 is basically perpendicular to the direction of the force applied by the battery to the expansion member 1, which is beneficial to reduce the influence of the expansion member 1 on the connection row 3 when the battery expansion force is applied.

[0080] In some embodiments, Figure 1 As shown, one side of the expansion member 1 is the first side 1b, and the other side of the expansion member 1 is the second side. When the battery expands, the battery can apply a squeezing force along the first side 1b toward the second side to the expansion member 1.

[0081] Among them, in the width direction of the expansion member 1, the central axis of the installation cavity 12 is located on the side of the width center of the expansion member 1 away from the first side 1b, so as to appropriately increase the distance between the installation cavity 12 and the battery, which can reduce the expansion force acting on the installation cavity 12 when the battery expands, which is beneficial to reduce the deformation of the installation cavity 12, and is beneficial to reduce the damage of the expansion force of the battery to the connecting row 3, thereby improving the safety of the connecting row 3; and / or, in the width direction of the expansion member 1, the connecting row 3 is arranged adjacent to the cavity wall of the installation cavity 12 away from the first side 1b, so as to appropriately increase the distance between the connecting row 3 and the battery, which can reduce the expansion force acting on the connecting row 3 when the battery expands, which is beneficial to reduce the damage of the expansion force of the battery to the connecting row 3, thereby improving the safety of the connecting row 3.

[0082] Optionally, in the width direction of the expansion member 1, the position of the installation cavity 12 in the expansion member 1 is not limited thereto, for example, the central axis of the installation cavity 12 is arranged in a direction close to the first side 1b, deviating from the width center of the expansion member 1, or, the central axis of the installation cavity 12 coincides with the width center of the expansion member 1, etc.; in the width direction of the expansion member 1, the position of the connection row 3 in the installation cavity 12 is not limited thereto, for example, the connection row 3 is arranged adjacent to the cavity wall of the installation cavity 12 close to the first side 1b, or, the connection row 3 is located at the center of the installation cavity 12, etc.

[0083] In some embodiments, Figure 1 As shown, there are multiple accommodating cavities 11, and in the height direction of the expansion member 1, at least one accommodating cavity 11 is respectively provided on both sides of the installation cavity 12, and the accommodating cavities 11 on both sides of the installation cavity 12 are respectively located on both sides of the height center of the expansion member 1, which is conducive to the reasonable arrangement of the installation cavity 12 and the accommodating cavity 11. On the premise that the accommodating cavity 11 and the installation cavity 12 do not interfere with each other, the central axis of the accommodating cavity 11 can be deviated from the height center of the expansion member 1 in the height direction of the expansion member 1, thereby reducing the battery expansion force on the accommodating cavity 11 and the corresponding protective support member 2, which is conducive to improving the structural stability of the accommodating cavity 11 and the corresponding protective support member 2.

[0084] In some embodiments, Figure 1 As shown, the above-mentioned width side (i.e., the first side 1b) of the installation cavity 12 facing the expansion member 1 is opened to form an opening 12a, and the connecting row 3 is suitable for being matched with the installation cavity 12 through the opening 12a, so that the connecting row 3 can be arranged in the installation cavity 12 through the opening 12a for easy installation.

[0085] For example, combined with Figure 1 and Figure 6In the width direction of the expansion member 1, the first side 1b is located on the right side of the expansion member 1, the battery is adapted to cooperate with the first side 1b, the central axis of the mounting cavity 12 is arranged in a direction away from the first side 1b and deviates from the width center of the expansion member 1, and the side of the mounting cavity 12 facing the expansion member 1 away from the first side 1b is open to form an opening 12a, and the connecting row 3 is suitable for being arranged in the mounting cavity 12 through the opening 12a; in the height direction of the expansion member 1, the two accommodating cavities 11 are respectively located on both sides of the mounting cavity 12, and a protective support member 2 is arranged in each accommodating cavity 11, and the protective support member 2 is formed with an exhaust channel 21, and the exhaust channel 21 is suitable for being connected to the explosion-proof valve of the battery; when the battery has thermal runaway, the two exhaust channels 21 can discharge the high-temperature gas out of the battery pack 200.

[0086] The battery pack 200 according to the embodiment of the second aspect of the utility model includes a tray 101, a battery and a protective exhaust assembly 100, the tray 101 defines a accommodating chamber 101a, the protective exhaust assembly 100 is the protective exhaust assembly 100 according to the embodiment of the first aspect of the utility model, the protective exhaust assembly 100 and the battery are both arranged in the accommodating chamber 101a, and at least one length end of the protective exhaust assembly 100 is spaced from the cavity wall of the accommodating chamber 101a to define a connecting channel 102, the connecting channel 102 connects the exhaust channel 21 and the explosion-proof valve of the battery; when the battery has thermal runaway, the high-temperature gas flows through the explosion-proof valve to the connecting channel 102 and to the exhaust channel 21, and then the high-temperature gas is discharged from the exhaust channel 21 out of the battery pack 200.

[0087] According to the battery pack 200 of the embodiment of the present invention, the safety of the battery pack 200 can be improved by adopting the above-mentioned protective exhaust assembly 100.

[0088] For example, combined with Figure 7-Figure 9 , the width direction of the tray 101 is the width direction of the expansion member 1 (for example Figure 7 The length direction of the tray 101 is the length direction of the expansion member 1 (for example Figure 7Take the front-to-back direction in the expansion member 1) as an example: the battery pack 200 includes a tray 101, a plurality of batteries and a protective exhaust assembly 100, the tray 101 defines at least one accommodating chamber 101a, each accommodating chamber 101a is provided with a protective exhaust assembly 100 and a plurality of batteries, the protective exhaust assembly 100 is arranged on one side of the corresponding accommodating chamber 101a in the width direction of the tray 101, the plurality of batteries can be connected in series, in parallel or in mixed connection, and the plurality of batteries are arranged in sequence along the width direction of the expansion member 1, each battery extends along the length direction of the expansion member 1, wherein the width side of the protective exhaust assembly 1 is suitable for being arranged opposite to the battery, in the length direction of the tray 101, one end of the length of the protective exhaust assembly 100 is spaced from the corresponding cavity wall of the accommodating chamber 101a to define a connecting channel 102, an explosion-proof valve is arranged at one end of the battery, and the exhaust channel 21 is connected to the explosion-proof valves of the plurality of batteries through the connecting channel 102. When there are multiple accommodating chambers 101a, the plurality of accommodating chambers 101a can be arranged in sequence along the length direction of the tray 101. Among them, Figure 7 The left-right, front-back, and other directions are only used to simplify the description, and do not indicate or imply that the tray 101 must have a specific orientation, be constructed and operated in a specific orientation.

[0089] The electric device according to the embodiment of the third aspect of the utility model comprises the battery pack 200 according to the embodiment of the second aspect of the utility model.

[0090] According to the electric device of the embodiment of the present invention, the safety of the electric device can be improved by adopting the above-mentioned battery pack 200.

[0091] Optionally, the electrical device may be, but is not limited to, a vehicle or an energy storage device; the vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle is provided with a battery pack 200, and the battery pack 200 may be arranged at the bottom, head or tail of the vehicle. The battery pack 200 may be used to power the vehicle, for example, the battery pack 200 may be used as an operating power source for the vehicle. In some embodiments of the present application, the battery pack 200 may be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0092] In the description of the present utility model, it should be understood that the terms "center", "length", "width", "up", "down", "front", "back", "left", "right", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0093] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A protective exhaust assembly, characterized in that: The protective exhaust assembly is used for a battery pack and includes: An expansion member, the expansion member is adapted to be opposite to and abut against the battery, and at least one accommodating cavity is defined in the expansion member; A protective support member is provided in at least one of the accommodating cavities, and an exhaust channel is defined in the protective support member, and the exhaust channel is suitable for communicating with the explosion-proof valve of the battery.

2. The protective exhaust assembly according to claim 1, characterized in that The expansion piece extends into a long strip shape, and a width side of the expansion piece is suitable for being arranged opposite to the battery. The accommodating cavity extends along the length direction of the expansion piece to pass through both ends of the length of the expansion piece.

3. The protective exhaust assembly according to claim 2, characterized in that: In the height direction of the expansion member, the central axis of the accommodating cavity is arranged to deviate from the height center of the expansion member.

4. The protective exhaust assembly according to claim 2, characterized in that: There are a plurality of accommodating cavities, and the plurality of accommodating cavities are spaced apart along the height direction and / or the width direction of the expansion member.

5. The protective exhaust assembly according to claim 4, characterized in that: At least two of the plurality of accommodating cavities are respectively provided with the protective support members.

6. The protective exhaust assembly according to claim 2, characterized in that: The expansion member defines a honeycomb structure, which includes a plurality of cavities. The shape formed by the peripheral walls of the cavities is a prism or a pyramid, and the central axis of the cavity extends along the width direction of the expansion member.

7. The protective exhaust assembly according to claim 1, characterized in that: The expansion member and the protective support member are connected by injection molding.

8. The protective exhaust assembly according to claim 1, characterized in that The expansion piece is a plastic piece, and the protective support piece is a metal piece, a ceramic piece, a composite material piece or a mica piece.

9. The protective exhaust assembly according to any one of claims 1 to 8, characterized in that: The expansion member further defines an installation cavity, the installation cavity is spaced apart from the accommodating cavity, and the protective exhaust assembly further includes: A connection bar, wherein the connection bar is suitable for being electrically connected to the battery, and a portion of the connection bar is fixedly disposed in the mounting cavity.

10. The protective exhaust assembly according to claim 9, characterized in that The expansion piece extends into a long strip shape, and a width side of the expansion piece is suitable for being arranged opposite to the battery. The installation cavity extends along the length direction of the expansion piece to pass through both ends of the length of the expansion piece.

11. The protective exhaust assembly according to claim 10, characterized in that The width side of the expansion member is a first side, In the width direction of the expansion member, the central axis of the installation cavity is located on a side of the width center of the expansion member away from the first side; and / or, In the width direction of the expansion member, the connection row is disposed adjacent to a cavity wall of the installation cavity away from the first side.

12. The protective exhaust assembly according to claim 10, characterized in that There are multiple accommodating cavities. In the height direction of the expansion member, at least one accommodating cavity is respectively provided on both sides of the installation cavity, and the accommodating cavities on both sides of the installation cavity are respectively located on both sides of the height center of the expansion member.

13. The protective exhaust assembly according to claim 10, characterized in that The width side of the installation cavity facing the expansion member is open to form an opening, and the connecting row is suitable for being matched with the installation cavity through the opening.

14. A battery pack, characterized in that: include: a tray, wherein the tray defines a receiving cavity; A battery and a protective exhaust assembly, wherein the protective exhaust assembly is the protective exhaust assembly according to any one of claims 1 to 13, wherein the protective exhaust assembly and the battery are both arranged in the accommodating cavity, and at least one length end of the protective exhaust assembly is spaced from the cavity wall of the accommodating cavity to define a connecting channel, and the connecting channel connects the exhaust channel and the explosion-proof valve of the battery.

15. An electrical device, characterized in that: Comprising the battery pack according to claim 14.

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