Protective exhaust assembly, battery pack and electric device

Abstract

The utility model discloses a protective exhaust assembly, a battery pack and a power utilization device, an expansion part is suitable for being opposite to and abutting against a battery, at least one containing cavity is defined in the expansion part, the at least one containing cavity is provided with a protective supporting part, an exhaust channel is defined in the protective supporting part, and the exhaust channel is suitable for being communicated with an anti-explosion valve of the battery; the adjusting part is arranged on one side, far away from the battery, of the expansion part, and the adjusting part is opposite to and abuts against the side plate of the battery pack. Therefore, by arranging the protective supporting piece and the adjusting piece in the accommodating cavity, the risk that the accommodating cavity is easily damaged by high-temperature gas when thermal runaway occurs can be reduced, the exhaust smoothness can be improved, and the spreading speed of the thermal runaway can be slowed down, so that the battery management system has enough reaction time, a power supply circuit of a battery can be timely cut off, and the service life of the battery is prolonged. Therefore, the safety of the battery pack is improved, platformization arrangement of the protective exhaust assembly can be realized, the development cost is reduced, and the universality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a protection and exhaust assembly, a battery pack, and an electrical device. Background Art

[0002] Currently, 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 at present.

[0003] At the same time, as the product matrix of new energy vehicles becomes more and more abundant, for example, in the same vehicle model or series of vehicle models, generally multiple cruising range versions are set. The battery pack capacities of vehicles with different cruising range versions are different, but the size of the installation position on the vehicle body for fixing the battery pack has been fixed, and battery packs with different cruising range versions need to be platformized to improve versatility. Summary of the Utility Model

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present application provides a protection and exhaust assembly, which can improve the safety of the battery pack and is suitable for the platform design of the battery pack.

[0005] The present application also provides a battery pack having the above protection and exhaust assembly.

[0006] The present application also provides an electrical device having the above battery pack.

[0007] In a first aspect, an embodiment of the present application provides a protection and exhaust assembly for a battery pack, the protection and exhaust assembly including: an expansion member, a protection support member, and an adjustment member. The expansion member is adapted to be disposed opposite to and abut against the battery. At least one accommodation cavity is defined in the expansion member, and at least one protection support member is disposed in the at least one accommodation cavity. An exhaust passage is defined in the protection support member, and the exhaust passage is adapted to communicate with a pressure relief valve of the battery. The adjustment member is disposed on a side of the expansion member away from the battery, and the adjustment member is disposed opposite to and abut against a side plate of the battery pack.

[0008] According to the protective exhaust assembly of the embodiments of the present application, by arranging a protective support member in the accommodation cavity, when the battery undergoes thermal runaway, the protective support member can separate the high-temperature gas from the cavity wall of the accommodation cavity, so as to reduce the risk that the accommodation cavity is easily damaged by the high-temperature gas during thermal runaway; 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 unchanged, and the protective support member can play a good supporting role for the expansion member, so as to improve the structural stability of the exhaust passage and the accommodation cavity, facilitate the exhaust passage to always remain connected when the battery expands, improve the exhaust smoothness, is beneficial to improving the structural stability and bearing capacity of the protective exhaust assembly, can prevent other batteries from contacting the high-temperature gas and continuing to cause more batteries to have thermal runaway, slow down the spread speed of thermal runaway, enable the battery management system to have sufficient reaction time, so as to cut off the power line of the battery in time, thereby improving the safety of the battery pack. On the other hand, through the arrangement of the adjusting member, the platform setting of the protective exhaust assembly can be realized, the development cost can be reduced, and the versatility can be improved.

[0009] According to some embodiments of the present application, the expansion member extends into a strip shape, one side of the width of the expansion member is adapted to be arranged opposite to the battery, the accommodation cavity extends along the length direction of the expansion member to penetrate through both ends of the length of the expansion member, and the adjusting member is arranged on the other side of the width of the expansion member.

[0010] Further, there are a plurality of accommodation cavities, and the plurality of accommodation cavities are arranged at intervals along the height direction and / or the width direction of the expansion member, and at least one protective support member is arranged in at least one accommodation cavity.

[0011] Further, the accommodation cavity includes at least one support member accommodation cavity and at least one partition accommodation cavity, a protective support member is arranged in the support member accommodation cavity, and a partition is arranged in the partition accommodation cavity.

[0012] Further, the extending direction of the partition has an included angle with the extending direction of the protective support member.

[0013] Further, a guiding portion is arranged at one end of the height of the adjusting member and is adapted to perform assembly guiding when the adjusting member is assembled to the battery pack.

[0014] Further, reinforcing ribs are arranged on the side of the adjusting member facing away from the expansion member, and the reinforcing ribs are in a grid shape.

[0015] According to some embodiments of the present application, one side of the width of the accommodation cavity is open, the protective support member is arranged in the accommodation cavity, and a limiting portion cooperating with the protective support member is arranged on the open side of the accommodation cavity.

[0016] In some embodiments, the exhaust protection assembly further includes: a fixing structure configured to fix a wiring harness and a sensor. The accommodating cavity further includes: at least one fixing structure accommodating cavity. The fixing structure is disposed in the fixing structure accommodating cavity, and the wiring harness is electrically connected to the battery. The sensor is configured to measure the operating signal of the battery.

[0017] According to some embodiments of the present application, the adjusting member is provided with a first connecting portion, and the expanding member is provided with a second connecting portion that cooperates with the first connecting portion, so that the adjusting member and the expanding member are detachably connected.

[0018] In some embodiments, the exhaust protection assembly further includes: a diaphragm. One side of the width of the accommodating cavity is open, and the diaphragm is disposed at least between the protective support member and the bottom wall opposite to the open side of the accommodating cavity.

[0019] Further, the diaphragm is configured as a mica member.

[0020] According to some embodiments of the present application, at least one set of limiting structures is provided on both sides of the height of the expanding member, and the limiting structures are adapted to position the heating diaphragm and the limiting rubber strip.

[0021] Further, multiple sets of limiting structures are sequentially arranged in the length direction of the expanding member to be adapted to position heating diaphragms and limiting rubber strips of different sizes respectively.

[0022] Further, the limiting structure is configured as one or more of a limiting groove, a limiting convex column, and a limiting hole.

[0023] In a second aspect, an embodiment of the present application provides a battery pack, including: a tray, a battery, a protection exhaust assembly, and a spacer beam. The tray defines an accommodating space, and the protection exhaust assembly and the battery are both disposed in the accommodating space. The spacer beam is disposed in the tray, and a communication channel is formed in the spacer beam, and the communication channel communicates with the exhaust channel and the explosion-proof valve.

[0024] According to some embodiments of the present application, a partition plate is disposed in the spacer beam. The partition plate divides the communication channel into a first sub-channel and a second sub-channel that extend along the length direction of the spacer beam and are spaced apart. Batteries and protection exhaust assemblies are disposed on both sides of the width of the spacer beam, and the two protection exhaust assemblies located on both sides of the width of the spacer beam are respectively communicated with the first sub-channel and the second sub-channel.

[0025] Further, there are two explosion-proof valves. The explosion-proof valves are disposed on the tray and are located at both ends of the length of the spacer beam, and are respectively communicated with the first sub-channel and the second sub-channel.

[0026] Further, a diversion cover is provided outside the explosion-proof valve, and the diversion outlet of the diversion cover extends to the bottom side edge of the tray.

[0027] In a third aspect, an embodiment of the present application provides an electrical device, including the above battery pack.

[0028] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the present application from one angle;

[0031] Figure 2 is a schematic diagram of a battery pack according to an embodiment of the present application from another angle;

[0032] Figure 3 is a schematic diagram of an exhaust protection component according to an embodiment of the present application;

[0033] Figure 4 is an exploded schematic diagram of an exhaust protection component according to an embodiment of the present application;

[0034] Figure 5 is a cross-sectional schematic diagram of an exhaust protection component according to an embodiment of the present application;

[0035] Figure 6 is a schematic diagram of the cooperation between an expansion member and a protection support member according to an embodiment of the present application;

[0036] Figure 7 is a cross-sectional schematic diagram of an expansion member and a protection support member according to an embodiment of the present application;

[0037] Figure 8 is a schematic diagram of an exhaust protection component according to an embodiment of the present application from one angle;

[0038] Figure 9 is a schematic diagram of an exhaust protection component according to an embodiment of the present application from another angle;

[0039] Figure 10 is a schematic diagram of a first limiting structure and a second limiting structure according to an embodiment of the present application;

[0040] Figure 11 is a schematic diagram of a third limiting structure according to an embodiment of the present application;

[0041] Figure 12 is a schematic diagram of a tray according to an embodiment of the present application from one angle;

[0042] Figure 13 is a schematic diagram of a tray according to an embodiment of the present application from another angle;

[0043] Figure 14 It is a partial sectional view schematic diagram of a tray according to an embodiment of the present application.

[0044] Reference numerals:

[0045] The protective exhaust assembly 100,

[0046] The expansion member 1, the accommodating cavity 11, the partition plate 111, the limiting portion 12, the second connecting portion 13, the limiting structure 14, the first limiting structure 141, the second limiting structure 142, the third limiting structure 143, the fixing structure 15,

[0047] The protective support member 2, the exhaust passage 21,

[0048] The adjusting member 3, the guiding portion 31, the reinforcing rib 32, the first connecting portion 33,

[0049] The diaphragm 4,

[0050] The battery pack 200, the tray 101, the communication passage 102, the first sub-channel 1021, the second sub-channel 1022, the spacer beam 103, the spacer plate 104, the flow guide cover 105,

[0051] The length direction X, the width direction Y, the height direction Z. Detailed implementation manners

[0052] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0053] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals 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 present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0054] Next, with reference to the drawings, the protective exhaust assembly 100 according to an embodiment of the present application will be described.

[0055] As Figure 1 and Figure 2As shown, an embodiment of the present application provides a protective exhaust assembly 100, and the protective exhaust assembly 100 is used for a battery pack 200.

[0056] Among them, as Figure 3 , Figure 4 and Figure 5 shown, the protective exhaust assembly 100 includes an expansion member 11, a protective support member 2, and an adjusting member 3. The expansion member 11 is adapted to be disposed opposite to and abut against the battery, so that the expansion member 11 is used to at least bear the expansion force of the battery, so that the expansion member 11 can absorb the expansion of the battery, reduce the extrusion force received by the battery, and play a certain role in bearing and protecting. Thus, the expansion member 11 can adaptively absorb the expansion force of the battery to improve the safety of the battery.

[0057] It can be understood that the expansion member 11 can absorb a certain amount of impact energy. When one 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 11, thereby reducing the deformation of the battery and playing a role in protecting the battery.

[0058] Optionally, the expansion member 11 can be a non-metallic member, such as a rubber member or a plastic member, etc.

[0059] Among them, at least one accommodation cavity is defined in the expansion member 11, the protective support member 2 is provided in at least one accommodation cavity, and an exhaust passage 21 is defined in the protective support member 2. The exhaust passage 21 is adapted to communicate with the pressure relief valve of the battery, and the exhaust passage 21 can communicate to the outside of the battery pack 200, so that when the battery undergoes a thermal runaway, the battery discharges high-temperature emission substances (high-temperature gas and fire flow) through the pressure relief valve, and the emission substances can be discharged to the outside of the battery pack 200 through the exhaust passage 21.

[0060] Thus, by providing the protective support member 2 in the accommodation cavity, when the battery undergoes thermal runaway, the protective support member 2 can separate the high-temperature gas from the wall surface of the accommodation cavity, preventing the high-temperature gas from contacting the wall surface of the accommodation cavity, thereby reducing the risk of the accommodation cavity being damaged by the high-temperature gas during thermal runaway, which is beneficial to improving the material selection flexibility of the expansion member 11. At the same time, the protective support member 2 has good structural strength relative to the expansion member 11. When the expansion member 11 is subjected to the expansion force of the battery, the deformation of the protective support member 2 is small or basically unchanged. The protective support member 2 can provide good support for the expansion member 11, enhancing the structural stability of the exhaust passage 21 and the accommodation cavity, facilitating the exhaust passage 21 to remain connected at all times when the battery expands, improving the exhaust smoothness and exhaust stability, reducing the risk of the exhaust passage 21 being blocked due to the battery expansion squeezing the exhaust passage 21 flat, which is beneficial to improving the structural stability and load-bearing capacity of the protective exhaust assembly 100, enabling the high-temperature gas generated when the battery undergoes thermal runaway to be discharged outside the battery pack 200 through the exhaust passage 21 in a timely manner. Furthermore, it can prevent other batteries from contacting the high-temperature gas and triggering thermal runaway in more batteries, slowing down the spread of thermal runaway, allowing the battery management system (BMS) to have sufficient reaction time to cut off the power supply line of the battery in a timely manner, thereby enhancing the safety of the battery pack 200.

[0061] It can be seen that the provision of the protective support member 2 can, to a certain extent, reduce the risk of the expansion member 11 being damaged or crushed by the battery expansion force, improving the reliability of use of the protective exhaust assembly 100.

[0062] It can be understood that an accommodation cavity is defined within the expansion member 11, and the protective support member 2 is provided in the accommodation cavity. When multiple accommodation cavities are defined within the expansion member 11, at least one of the multiple accommodation cavities is provided with the protective support member 2.

[0063] Optionally, the cross-sectional shape of the accommodation cavity is not limited. For example, the cross-sectional shape of the accommodation cavity can be circular, elliptical, square, or the like.

[0064] It can be understood that when there are multiple accommodation cavities, the arrangement of the multiple accommodation cavities is not specifically limited. Whether there is one or multiple accommodation cavities, for a single accommodation cavity, the position of the accommodation cavity is not limited. For example, in the height direction of the expansion member 11 (such as the up and down direction in the figure), the accommodation cavity can be located at the end or in the middle of the expansion member 11. In the width direction of the expansion member 11 (such as the left and right direction in the figure), the accommodation cavity can be located at the end or in the middle of the expansion member 11.

[0065] Furthermore, on the side of the expansion member 11 away from the battery, an adjustment member 3 can be further provided. The adjustment member 3 can fill the gap between the expansion member 11 and the side plate of the battery pack 200 (such as the tray 101 and the side plate of the box body) on the back side of the expansion member 11 (i.e., the side away from the battery), so as to improve the installation stability and reliability of the protection and exhaust assembly 100 in the battery pack 200, enable the expansion member 11 to stably and reliably push against the battery, effectively push against the battery, and exhaust and relieve pressure in time when thermal runaway occurs, reducing the spread speed of thermal runaway.

[0066] It can be understood that the adjustment member 3 is suitable for filling the gap between the expansion member 11 and the side plate of the battery pack 200. For example, an adjustment member 3 with elasticity is selected, or the adjustment member 3 is set in multiple sizes and one of them is selected for use, so that the expansion member 11 and the protection and support member 2 can be constructed as general components, which are universal for multiple platforms. The adjustable adjustment member 3 or the adjustment member 3 with multiple replaceable sizes can make the exhaust and protection assembly 100 of the embodiment of the present application applicable to multiple battery packs 200 and batteries with different specifications and sizes, which can reduce the development cost and improve the versatility.

[0067] For the protection and exhaust assembly 100 according to the embodiment of the present application, on the one hand, by providing the protection and support member 2 in the accommodation cavity, when thermal runaway occurs in the battery, the protection and support member 2 can separate the high-temperature gas from the cavity wall of the accommodation cavity, so as to reduce the risk that the accommodation cavity is easily damaged by the high-temperature gas during thermal runaway; at the same time, the protection and support member 2 has good structural strength relative to the expansion member 11. When the expansion member 11 is subjected to the expansion force of the battery, the deformation of the protection and support member 2 is small or basically unchanged. The protection and support member 2 can play a good supporting role for the expansion member 11, so as to improve the structural stability of the exhaust channel 21 and the accommodation cavity, facilitate the exhaust channel 21 to always remain connected when the battery expands, improve the exhaust smoothness, be beneficial to improving the structural stability and load-bearing capacity of the protection and exhaust assembly 100, avoid other batteries from contacting the high-temperature gas and continuing to cause more batteries to have thermal runaway, slow down the spread speed of thermal runaway, enable the battery management system to have enough reaction time, so as to cut off the power line of the battery in time, thereby improving the safety of the battery pack 200. On the other hand, through the setting of the adjustment member 3, the platform setting of the protection and exhaust assembly 100 can be realized, the development cost can be reduced, and the versatility can be improved.

[0068] It should be noted that as the product matrix of new energy vehicles becomes more and more abundant, for example, for the same model or series of models, generally multiple endurance versions are set. The battery pack capacities of vehicles with different endurance versions are different, but the sizes of the installation positions on the vehicle body for fixing the battery pack have been fixed. Different endurance version battery packs need to be platformized to improve the versatility.

[0069] Based on this, the present application further makes the adjusting members 3 be of multiple types, and the sizes of the multiple adjusting members 3 in the width direction are different, so as to selectively select one or more of the adjusting members 3 to adapt to batteries and battery packs of different specifications.

[0070] It should be noted that for a battery pack 200 of the same specification, based on different usage scenarios, the battery specifications placed in the battery pack 200 may be different. When using batteries of different specification sizes, the gaps between the batteries and the side plates are different. By selecting an adjusting member 3 with a suitable width size, the fixation of batteries of multiple different specification sizes in the same battery pack 200 can be realized, achieving the platformization of the battery pack 200 and reducing costs. For battery packs 200 of different specifications, the protection and exhaust assembly 100 of the embodiment of the present application can also be used for each of them. By selecting a suitable adjusting member 3, the stable and reliable stopping of the protection and exhaust assembly 100 against the battery in the battery pack 200 can be realized, and the emission protection during thermal runaway can be achieved. In other words, through the setting of the adjusting member 3, the adaptability of the protection and exhaust assembly 100 is stronger, and it can be made common among multiple battery packs 200 on the same platform, and can also match multiple battery packs 200 of different specifications.

[0071] That is to say, the expansion member 11 and the protection and support member 2 can be constructed as common components. When multiple types of batteries are used in the same battery pack, the reuse of the expansion member 11 and the protection and support member 2 can be realized by selecting adjusting members 3 of different sizes. When the battery packs are different and the battery sizes in each battery are different, different sizes of adjusting members 3 can also be selected respectively to improve the adaptability of the exhaust protection assembly 100, making the generalization degree of the expansion member 11 and the protection and support member 2 of the embodiment of the present application higher.

[0072] In other words, there can be multiple types of adjusting members 3, so that the expansion member 11 and the protection and support member 2 can be constructed as common components. Furthermore, according to the gap between the battery and the side plate of the battery pack 200, an adjusting member 3 with a suitable thickness can be selected, and the platformization setting of the protection and exhaust assembly 100 can be realized, reducing the development cost and improving the generality.

[0073] It can be understood that the expansion member 11 and the protection and support member 2 can be made general, and just by selecting a suitable adjusting member 3, the number of molds can be reduced, the mold opening cost can be reduced, the types of production line materials are few, the risk of mixing materials in the co-platform and co-line production of battery packs 200 can also be reduced, and the processing efficiency and accuracy can be improved.

[0074] Meanwhile, the overall exhaust scheme can achieve platform design. The exhaust effects of different products can seek their rules according to minor custom modifications outside the standardized design, and quantitative analysis can be carried out on the results of the thermal diffusion test. It has predictability and reference value for the risk assessment of subsequent platform projects, eliminating the need to re-verify the scheme each time, shortening the test cycle, and reducing the test cost.

[0075] It should be noted that the length direction of the embodiment of the present application corresponds to the X direction in the attached drawings, the width direction corresponds to the Y direction in the attached drawings, and the height direction corresponds to the Z direction in the attached drawings.

[0076] In some embodiments, such as Figure 6 and Figure 7 shown, the expansion member 11 extends in a long strip shape, and one side of the width of the expansion member 11 is adapted to be disposed opposite to the battery. When the battery expands, the battery can squeeze the expansion member 11 along the width direction of the expansion member 11 (for example, Figure 4 the Y direction in ). The accommodating cavity extends along the length direction of the expansion member 11 to penetrate through both ends of the length of the expansion member 11, which is beneficial to simplifying the assembly of the protective support member 2 and the expansion member 11. At the same time, it is convenient for the accommodating cavity to have sufficient length for arranging 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 pressure relief valve, so that the exhaust passage 21 is adapted to communicate with the pressure relief valve of the battery, and high-temperature gas can be discharged out of the battery through the exhaust passage 21 during thermal runaway.

[0077] In addition, when the number of accommodating cavities is greater than the number of protective support members 2, the accommodating cavities are adapted to communicate with the pressure relief valve of the battery and communicate to the outside of the battery pack 200. The accommodating cavities without the protective support member 2 can also be used as exhaust cavities to guide the discharged substances of the battery from one end of the length of the accommodating cavity to the other end for discharging out of the battery pack 200.

[0078] Furthermore, the adjusting member 3 is located on the other side of the expansion member 11, so that the expansion member 11 can be pushed against, reducing the gap between the expansion member 11 and the exhaust passage 21 in the battery pack 200, improving the exhaust effect and exhaust efficiency.

[0079] In some embodiments, in combination with Figure 5 , Figure 6 and Figure 7 shown, 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 11, and at least one accommodating cavity is provided with a protective support member 2.

[0080] Accordingly, at least one of the plurality of accommodating cavities is provided with a protective support member 2. At this time, if the number of accommodating cavities provided with the protective support member 2 is less than the total number of accommodating cavities, the high-temperature gas during battery thermal runaway can be discharged through at least one accommodating cavity and at least one exhaust passage 21; if each accommodating cavity is respectively provided with the protective support member 2, the high-temperature gas during battery thermal runaway can be discharged through a plurality of exhaust passages 21.

[0081] It can be understood that when the number of accommodating cavities provided with the protective support member 2 is less than the total number of accommodating cavities, even if the expansion member 11 is deformed due to the battery expansion force, resulting in blockage in the accommodating cavity without the protective support member 2, the high-temperature gas can still be discharged through the exhaust passage 21, improving the safety of the battery pack 200.

[0082] Furthermore, the accommodating cavity includes: at least one support member accommodating cavity and at least one partition accommodating cavity. The protective support member 2 is arranged in the support member accommodating cavity, and the partition 111 is arranged in the partition accommodating cavity.

[0083] That is to say, among the plurality of accommodating cavities, there can be at least one partition accommodating cavity and at least one support member accommodating cavity. Except for the accommodating cavity provided with the protective support member 2, the partition 111 can be further arranged in other accommodating cavities, so as to achieve support in the accommodating cavity through the partition 111, improve the structural strength of the expansion member 11, reduce the deformation of the expansion member 11, reduce the probability of deformation of the accommodating cavity without the protective support member 2, reduce the deformation and displacement of the expansion member 11, so that the connection stability between the exhaust passage 21 and the protective support member 2 is higher and the exhaust reliability is higher.

[0084] Exemplarily, the expansion member 11 defines three accommodating cavities arranged in sequence along the height direction. The first accommodating cavity and the third accommodating cavity are configured as partition accommodating cavities, and the partition 111 is arranged inside them. The second accommodating cavity (i.e., the middle accommodating cavity) is configured as a support member accommodating cavity, and the protective support member 2 is arranged inside it. Through the two partition accommodating cavities on both sides of the support member accommodating cavity, the structural strength of the expansion member 11 can be further improved, and the probability of deformation of the accommodating cavity after being squeezed can be reduced, especially the probability of deformation of the support member accommodating cavity, so that the exhaust passage 21 can exhaust stably and reliably.

[0085] In some embodiments, as Figure 4 and Figure 6 shown, the extending direction of the partition 111 has an included angle with the extending direction of the protective support member 2.

[0086] Specifically, the protective support member 2 can extend along the length direction of the expansion member 11, while the partition 111 is located in the accommodation cavity, and can extend along the width direction and the height direction. By means of the partition 111 having an included angle with the protective support member 2, while improving the structural strength of the expansion member 11, it is possible to support and limit the protective support member 2 on both sides of the height of the protective support member 2, and reduce the probability of deformation of the protective support member 2 when the expansion beam is heated and deformed.

[0087] In some embodiments, as shown in Figure 4 and Figure 5 a guiding portion 31 is provided at one end of the height of the adjusting member 3 and is adapted to perform assembly guiding when the adjusting member 3 is assembled to the battery pack 200.

[0088] It should be noted that, in order to improve the fixing stability of the protective exhaust assembly 100 in the battery pack 200 and improve the clamping and fixing effect on the battery, the gap between the side plate of the battery pack 200 and the battery can be equal to or slightly smaller than the width of the protective exhaust assembly 100. For example, the gap size is 15 mm, while the width of the protective exhaust assembly 100 is 15 mm or 16 mm, so as to achieve a slightly interference fit or a gapless fit.

[0089] Based on this, in the present application, a guiding portion 31 is provided at one end of the height of the adjusting member 3. For example, when assembling from top to bottom, the guiding portion 31 is provided at the lower end; when assembling from bottom to top, the guiding portion 31 is provided at the lower end. The projection profile of the guiding portion 31 in the length direction can be an inclined surface, and in the region where the guiding portion 31 is located, the cross-sectional width of the adjusting member 3 in the assembly direction gradually increases. By preferentially assembling the end with a smaller cross-sectional width, the assembly guiding effect can be achieved, the assembly difficulty can be reduced, and the assembly accuracy can be improved.

[0090] In some embodiments, as shown in Figure 4 a reinforcing rib 32 is provided on the side of the adjusting member 3 facing away from the expansion member 11, and the reinforcing rib 32 is in a grid shape.

[0091] Specifically, the reinforcing rib 32 can include a first reinforcing rib 32 extending along a first direction and a second reinforcing rib 32 extending along a second direction. The first direction can be any direction such as the length direction, the width direction, the height direction, etc., and the second direction can also be any direction among the length direction, the width direction, and the height direction. And the first direction and the second direction have an included angle, so that the first reinforcing rib 32 and the second reinforcing rib 32 are arranged in a staggered manner to define a grid-like structure, improve the structural strength of the adjusting member 3, reduce the buckling of the adjusting member 3 after bearing pressure, enable the protective exhaust assembly 100 to bear greater pressure, and have a certain impact resistance, thereby improving the protection effect on the battery.

[0092] Of course, the structure of the reinforcing rib 32 on the adjusting member 3 in the embodiments of the present application is not limited to this setting. In some other embodiments, the reinforcement may only define a honeycomb structure, and the honeycomb structure includes a plurality of cavities, and the shape enclosed by the peripheral walls of each cavity is a prism or a pyramid. Thus, the structural strength of the adjusting member 3 can also be improved, enabling the adjusting member 3 to withstand more expansion force, which is beneficial to reducing the risk of damage to the protection and exhaust assembly 100 under the action of the expansion force of the battery. At the same time, the exhaust protection assembly can withstand more impact energy, which is beneficial to reducing the damage to the battery caused by the impact, thereby improving the safety of the battery.

[0093] Optionally, for a single cavity, the shape enclosed by the peripheral wall of the cavity is a prism or a pyramid. It can be understood that the shapes enclosed by the peripheral walls of multiple cavities can be the same or different. For example, the shapes enclosed by the peripheral walls of all cavities are hexagonal prisms; or, for another example, the shape enclosed by the peripheral wall of at least one of the multiple cavities is a hexagonal prism, and the shape enclosed by the peripheral wall of at least one of the remaining cavities is a quadrangular prism.

[0094] In some embodiments, the anti-deformation performance of the protection and support member 2 is better than that of the expansion member 11; and / or, the high-temperature resistance performance of the protection and support member 2 is better than that of the expansion member 11.

[0095] Among them, if the anti-deformation performance of the protection and support member 2 is better than that of the expansion member 11, then setting the protection and support member 2 in the accommodation cavity can improve the structural strength of the accommodation cavity, enabling the exhaust passage 21 to withstand a greater expansion force of the battery and enhancing the structural stability of the exhaust passage 21, so that the exhaust passage 21 can remain connected to discharge high-temperature gas during battery thermal runaway, thereby improving the safety of the battery pack 200.

[0096] In some examples, if the high-temperature resistance performance of the protection and support member 2 is better than that of the expansion member 11, then setting the protection and support member 2 in the accommodation cavity can improve the high-temperature resistance of the accommodation cavity, enabling the exhaust passage 21 to withstand high-temperature gas and preventing the high-temperature gas from damaging the accommodation cavity (such as melting, etc.), thereby improving the performance of the protection and exhaust assembly, enhancing the stability of the exhaust passage 21 and the stability of the exhaust efficiency, which is beneficial to slowing down the occurrence speed of battery thermal runaway, so that the battery management system has an appropriate reaction time to cut off the battery power supply, and further improving the safety of the battery pack 200.

[0097] In some embodiments, both the expansion member 11 and the adjustment member 3 are plastic parts, so that the expansion member 11 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 play a role in protecting the battery; the protective support member 2 can be a metal part, a ceramic part, a composite material part or a mica part, so that the protective support member 2 has appropriate structural strength and high temperature resistance. In addition, there are various choices for the protective support member 2, which can adapt to the battery structure and the requirements of the protective exhaust assembly 100 to select appropriate materials and improve the safety of the battery pack 200.

[0098] Further, in an embodiment where the protective support member 2 is configured as a metal part, the protective exhaust assembly 100 further includes a diaphragm 4. One side of the width of the accommodation cavity is open, and the diaphragm 4 is at least disposed between the protective support member 2 and the bottom wall opposite to the open side of the accommodation cavity.

[0099] Specifically, the bottom wall of the accommodation cavity refers to the side wall surface of the expansion member 11 opposite to the battery, that is, the side wall surface opposite to the open side. The diaphragm 4 is disposed on this side, which can achieve insulation protection for the protective support member 2 configured as a metal part and improve the safety and reliability of the battery pack 200.

[0100] In some embodiments, the diaphragm 4 can be configured as a mica part, and the diaphragm 4 is located inside the accommodation cavity and can separate the protective support member 2 from the expansion member 11 to achieve good insulation protection.

[0101] It should be noted that the material of the diaphragm 4 is not limited to mica material, and can also be other polymer material parts, composite material parts, etc. with good insulation performance, high temperature resistance performance and corrosion resistance performance.

[0102] As Figure 4 shown, in order to ensure that the diaphragm 4 can effectively separate the protective support member 2, the diaphragm 4 can include a first film, and second films on both sides of the height of the first film. The second films are attached to the surface of the protective support member 2 facing the battery, and at least part of the second films are attached to the two side surfaces of the height of the protective support member 2 to improve the insulation protection effect.

[0103] As Figure 5 、 Figure 6 and Figure 7 shown, one side of the width of the accommodation cavity is open, the protective support member 2 is disposed in the accommodation cavity, and a limiting portion 12 cooperating with the protective support member 2 is provided on the open side of the accommodation cavity.

[0104] Specifically, the protective support member 2 can be inserted into the accommodation cavity from the left and right ends of the expansion member 11, or can be assembled into the accommodation cavity from the open side. The limiting portion 12 is provided on the open side, and the protective support member 2 can be limited by the limiting portion 12 to improve the fixing stability of the protective support member 2 and reduce the assembly difficulty between the expansion member 11 and the protective support member 2.

[0105] It should be noted that the limiting part 12 can be configured as a limiting buckle, and the limiting buckles are arranged in pairs. Each pair of limiting buckles is arranged oppositely in the height direction, and multiple pairs of limiting buckles are arranged at intervals in the length direction. The buckling parts of each pair of limiting buckles are each formed with an inclined surface and a pushing surface. The inclined surface is suitable for assembly guiding to facilitate the entry of the protective support member 2 into the accommodation cavity, and the stopping surface is suitable for pushing and limiting the protective support member 2 in the width direction.

[0106] As Figure 6 and Figure 7 shown, the protective exhaust assembly 100 further includes: a fixing structure, and the accommodation cavity further includes: at least one fixing structure accommodation cavity. The fixing structure is used for fixing the wire harness and the sensor, and the fixing structure is arranged in the fixing structure accommodation cavity. The wire harness is electrically connected to the battery, and the sensor is used for measuring the working signal of the battery.

[0107] Specifically, the wire harness can be configured to be electrically connected to the battery, can also be configured as a collecting wire harness, or can also be configured as a power supply wire harness for the sensor. The sensor can be one or more of a power sensor, a current sensor, and a temperature sensor to be used for measuring different working signals of the battery, such as voltage signals, current signals, temperature signals, etc. One of the corresponding multiple accommodation cavities can be formed as a fixing structure accommodation cavity, and the fixing structure can be arranged in the fixing structure accommodation cavity. The fixing structure can include two oppositely arranged baffle plates and a limiting plate located at one width end of a baffle plate. The two baffle plates define a wire routing space, and the wire harness can be arranged in the wire routing space and is limited by the limiting plate. The sensor can be located at the end of the wire harness, penetrate the wire routing space, and can extend out of the expansion member 11 to be adjacent to the battery.

[0108] Exemplarily, the expansion member 11 defines three accommodation cavities arranged in sequence along the height direction. Among them, from top to bottom, the first accommodation cavity is configured as a partition accommodation cavity, and a partition 111 is arranged inside it. The second accommodation cavity (i.e., the middle accommodation cavity) is configured as a support member accommodation cavity, and a protective support member 2 is arranged inside it. The third accommodation cavity is configured as a fixing structure accommodation cavity, and a fixing structure is formed inside it, and the wire harness and the sensor are fixed through the fixing structure.

[0109] See Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown, the adjusting member 3 is provided with a first connecting portion 33, and the expansion member 11 is provided with a second connecting portion 13 that cooperates with the first connecting portion 33 so that the adjusting member 3 and the expansion member 11 are detachably connected.

[0110] Specifically, the first connecting parts 33 and the second connecting parts 13 are arranged in one-to-one correspondence. The adjusting member 3 can be provided with a plurality of first connecting parts 33 in the length direction. The plurality of first connecting parts 33 are arranged at intervals, and at least the first connecting parts 33 are provided at the end of the adjusting member 3 and in the middle area of the adjusting member 3. The expansion member 11 can be provided with a plurality of second connecting parts 13 in the length direction. The plurality of second connecting parts 13 are arranged at intervals, and at least the second connecting parts 13 are provided at the end of the expansion member 11 and in the middle area of the expansion member 11.

[0111] Among them, the first connecting part 33 is configured as a buckle, and the second connecting part 13 is configured as a clamping hole, or the first connecting part 33 is configured as a clamping hole, and the second connecting part 13 is configured as a buckle. Through the clamping cooperation between the first connecting part 33 and the second connecting part 13, the detachable connection between the adjusting member 3 and the expansion member 11 is realized, the assembly difficulty between the adjusting member 3 and the expansion member 11 is reduced, and the phenomenon that the adjusting member 3 is locally warped relative to the expansion member 11 can be avoided, thereby improving the connection stability.

[0112] As Figure 8 and Figure 9 shown, at least one set of limiting structures 14 are provided on both sides of the height of the expansion member 11. The limiting structures 14 are suitable for positioning the heating film and the limiting rubber strip.

[0113] Among them, multiple sets of limiting structures 14 are arranged in sequence in the length direction of the expansion member 11 to be suitable for positioning heating films and limiting rubber strips of different sizes respectively.

[0114] That is to say, multiple sets of limiting structures 14 can be provided on both sides of the height. Each set of limiting structures 14 can be used for limiting a component fixed on the protection exhaust assembly 100. Multiple sets of limiting structures 14 can realize the limiting of multiple components, or realize the limiting of the same component in multiple areas fixed on the protection exhaust assembly 100.

[0115] Exemplarily, two limiting rubber strips are provided on the expansion member 11 and are respectively arranged at both ends of the expansion member 11. Then, the limiting structures 14 for fixing the limiting rubber strips can be provided at both ends of the expansion member 11. The heating film can heat the battery, and multiple heating films are connected in series. Two, three or more series-connected heating films can be simultaneously provided on the expansion member 11. Corresponding multiple limiting structures 14 are provided on the expansion member 11. The multiple limiting structures 14 are spaced apart in the length direction and are all used for limiting the heating film.

[0116] Furthermore, referring to Figure 10 and Figure 11As shown, the setting positions of the heating membranes in battery packs 200 of different specifications are different, and the setting positions of the limiting rubber strips are different. In the present application, a variety of limiting structures 14 can be set on the expansion member 11, such as the first limiting structure 141, the second limiting structure 142 and the third limiting structure 143, so as to limit the components that need to be set at different positions of the expansion member 11 respectively, such as: the first limiting structure 141 can realize the limiting of the first limiting rubber strip, the second limiting structure 142 can realize the limiting of the second limiting rubber strip, and so on.

[0117] In this way, the exhaust protection assembly of the embodiment of the present application can be adapted to fix and limit components such as limiting strips and heating diaphragms of various battery pack 200 items.

[0118] At the same time, since other components of the module, such as the heating diaphragm, the limiting rubber strip, the temperature sensor, etc., rely on the limiting structure 14 on the adjusting part 3 for feature positioning, at the beginning of the design, all possible positioning features in the platform are integrated on the adjusting part 3 with the same or different limiting structures 14, which can not only shorten the design cycle and streamline the design personnel, but also control the risks and reliability of the exhaust channels 21 of all projects from the platform perspective; in addition, if a new project is required, a new positioning groove can be repaired and made. In theory, the same side panel can be used for battery pack 200 projects with the same battery cell platform (same battery size).

[0119] It can be understood that the limiting structure 14 is constructed as one or more of a limiting groove, a limiting protrusion, and a limiting hole.

[0120] Combination Figure 2 , Figure 12 , Figure 13 as well as Figure 14 As shown, the battery pack 200 according to the second embodiment of the present application includes a tray 101, a battery and protective exhaust assembly 100, and a spacer beam 103.

[0121] Among them, the tray 101 defines a accommodating space, an explosion-proof valve is arranged on the tray 101, the protective exhaust component 100 is the protective exhaust component 100 according to the above-mentioned first aspect embodiment of the present application, the protective exhaust component 100 and the battery are both arranged in the accommodating space, the spacing beam 103 is arranged in the tray 101, a connecting channel 102 is formed in the spacing beam 103, and the connecting channel 102 connects the exhaust channel and the explosion-proof valve.

[0122] Specifically, the pressure relief valve of the battery is communicated with the exhaust passage 21. When the battery has a thermal runaway, the pressure relief valve opens and exhausts to the exhaust passage 21. The exhaust passage 21 is communicated with the communication passage 102, and the communication passage 102 is communicated with the explosion-proof valve, so that the high-temperature and high-pressure gas flow (gas-liquid mixture, gas-liquid-solid mixture, etc.) generated by the thermal runaway of the battery can be discharged through the exhaust path composed of the pressure relief valve, the exhaust passage 21, the communication passage 102 and the expansion valve.

[0123] For the battery pack 200 according to the embodiment of the present application, by adopting the above-mentioned protection exhaust assembly 100, the safety of the battery pack 200 can be improved.

[0124] It can be understood that in some embodiments, the tray 101 can be integrally formed with the protection support member 2, and the expansion member 11 and the adjustment member 3 clamp the protection support member 2.

[0125] See Figure 12 、 Figure 13 and Figure 14 As shown, a partition plate 104 is arranged in the spacer beam 103. The partition plate 104 divides the communication passage 102 into a first sub-channel 1021 and a second sub-channel 1022 that extend along the length direction of the spacer beam 103 and are spaced apart. Battery and protection exhaust assemblies are arranged on both width sides of the spacer beam 103, and the two protection exhaust assemblies 100 located on both width sides of the spacer beam 103 are respectively communicated with the first sub-channel 1021 and the second sub-channel 1022.

[0126] That is to say, the tray 101 batteries can be placed in groups or modules, and a spacer beam 103 is arranged between two adjacent groups or battery modules to separate the adjacent battery groups or battery modules. Then, a partition plate 104 is arranged inside the spacer beam 103, and the partition plate 104 can divide the communication passage 102 into two sub-channels, namely the first sub-channel 1021 and the second sub-channel 1022. Then, when a battery group or battery module on one width side of the spacer beam 103 has a thermal runaway, the generated high-temperature gas can be discharged into the first sub-channel 1021 through the corresponding exhaust passage 21, and then discharged from the battery pack through the explosion-proof valve corresponding to the first sub-channel 1021. When a battery group or battery module on the other width side of the spacer beam 103 has a thermal runaway, the generated high-temperature gas can be discharged into the second sub-channel 1022 through the corresponding exhaust passage 21, and then discharged from the battery pack through the explosion-proof valve corresponding to the second sub-channel 1022.

[0127] Thus, through the spacer 104, two spaced exhaust paths are defined between two adjacent battery packs or battery modules. The two exhaust paths correspond to the two battery packs or battery modules respectively, so that the exhaust paths are spaced apart, preventing high-temperature gas from acting on another battery pack or battery module through the exhaust channel 21 or the communication channel 102 when a certain battery pack or battery module has a thermal runaway, thereby further reducing the thermal runaway spread speed of the battery pack, effectively delaying the spread of thermal runaway, and improving the safety of the battery pack.

[0128] It can be understood that there are two explosion-proof valves. The explosion-proof valves are arranged on the tray 101 and are located at the two length ends of the spacer beam 103, and are respectively communicated with the first sub-channel 1021 and the second sub-channel 1022.

[0129] As Figure 12 and Figure 13 shown, a flow guide cover 105 is provided on the explosion-proof valve housing. The flow outlet of the flow guide cover 105 extends to the bottom side edge of the tray 101.

[0130] It should be noted that the flow outlet extending to the bottom side edge of the tray 101 means that the flow outlet is flush with the bottom side edge of the tray 101 in the height direction or can slightly protrude from the bottom side edge of the tray 101, so that the high-temperature gas discharged from the flow guide cover 105 can be discharged towards the ground or towards the bottom of the battery pack, rather than towards the periphery of the battery pack, which can reduce the probability of the high-temperature gas acting on the components around the battery pack and reduce the impact of the high-temperature gas discharge on the surrounding components, so as to further improve safety.

[0131] Exemplarily, in the embodiment where the battery pack is applied to a vehicle, the battery pack is arranged on the chassis of the vehicle. When a thermal runaway occurs, directly exhausting towards the ground can effectively reduce the probability of damage or even combustion of the components arranged around the battery pack caused by high-temperature gas, further delay the thermal runaway spread speed, and improve the safety of the vehicle.

[0132] The electrical device according to the third aspect embodiment of the present application includes the battery pack 200 according to the second aspect embodiment of the present application above.

[0133] By adopting the above battery pack 200, the safety of the electrical device according to the embodiment of the present application can be improved.

[0134] 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, an extended-range vehicle, etc. The vehicle is provided with a battery pack 200, and the battery pack 200 may be disposed at the bottom, head, or tail of the vehicle. The battery pack 200 can be used for power supply of the vehicle. For example, the battery pack 200 can be used as the operating power source of the vehicle. In some embodiments of the present application, the battery pack 200 can not only be used as the operating power source of the vehicle, but also be used as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0135] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0136] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0138] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application 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 (11), the expansion member (11) being adapted to be opposite to and abutting against the battery, and at least one accommodating cavity being defined in the expansion member (11); A protective support member (2), wherein at least one of the accommodating chambers is provided with the protective support member (2), and an exhaust channel (21) is defined in the protective support member (2), and the exhaust channel (21) is suitable for communicating with a pressure relief valve of the battery; An adjusting member (3) is arranged on a side of the expansion member (11) away from the battery, and the adjusting member (3) is arranged opposite to and abuts against a side plate of the battery pack.

2. The protective exhaust assembly according to claim 1, characterized in that: The expansion piece (11) extends into a long strip shape, and one side of the width of the expansion piece (11) is suitable for being arranged opposite to the battery. The accommodating cavity extends along the length direction of the expansion piece (11) to both ends of the length of the expansion piece (11), and the adjusting piece (3) is arranged on the other side of the width of the expansion piece (11).

3. The protective exhaust assembly according to claim 2, characterized in that: There are a plurality of accommodating cavities, which are arranged at intervals along the height direction and / or width direction of the expansion member (11), and the protective support member (2) is arranged in at least one of the accommodating cavities.

4. The protective exhaust assembly according to claim 1, characterized in that: The accommodating cavity comprises: at least one support member accommodating cavity and at least one partition plate accommodating cavity, the protective support member (2) being arranged in the support member accommodating cavity, and the partition plate (111) being arranged in the partition plate accommodating cavity.

5. The protective exhaust assembly according to claim 4, characterized in that: An extension direction of the partition plate (111) and an extension direction of the protective support member (2) form an included angle.

6. The protective exhaust assembly according to claim 1, characterized in that A guide portion (31) is provided at one end of the height of the adjusting member (3) and is suitable for providing assembly guidance when the adjusting member (3) is assembled to the battery pack.

7. The protective exhaust assembly according to claim 6, characterized in that: A reinforcing rib (32) is provided on a side of the adjusting member (3) facing away from the expansion member (11), and the reinforcing rib (32) is in a grid shape.

8. The protective exhaust assembly according to claim 1, characterized in that One side of the accommodating cavity is open, the protective support member (2) is arranged in the accommodating cavity, and a limiting portion (12) cooperating with the protective support member (2) is arranged on the open side of the accommodating cavity.

9. The protective exhaust assembly according to claim 1, characterized in that: Also includes: A fixed structure, the fixed structure is used to fix the wiring harness and the sensor, the accommodating cavity also includes: at least one fixed structure accommodating cavity, the fixed structure is arranged in the fixed structure accommodating cavity, and the wiring harness is electrically connected to the battery, and the sensor is used to measure the working signal of the battery.

10. The protective exhaust assembly according to claim 1, characterized in that The adjusting member (3) is provided with a first connecting portion (33), and the expanding member (11) is provided with a second connecting portion (13) cooperating with the first connecting portion (33), so that the adjusting member (3) and the expanding member (11) are detachably connected.

11. The protective exhaust assembly according to claim 1, characterized in that Also includes: A diaphragm (4) is open on one side of the width of the accommodating cavity, and the diaphragm (4) is at least arranged between the protective support member (2) and the bottom wall opposite to the open side of the accommodating cavity.

12. The protective exhaust assembly according to claim 11, characterized in that The diaphragm (4) is constructed as a mica piece.

13. The protective exhaust assembly according to claim 1, characterized in that At least one set of limiting structures (14) is provided on both sides of the height of the expansion member (11), and the limiting structures (14) are suitable for positioning the heating diaphragm and the limiting rubber strip.

14. The protective exhaust assembly according to claim 13, characterized in that A plurality of groups of the limiting structures (14) are arranged in sequence in the length direction of the expansion member (11), so as to be suitable for positioning the heating diaphragms and the limiting rubber strips of different sizes respectively.

15. The protective exhaust assembly according to claim 13, characterized in that The limiting structure (14) is constructed as one or more of a limiting groove, a limiting convex column, and a limiting hole.

16. A battery pack, characterized in that: include: A tray (101), the tray (101) defining a storage space, and the tray (101) being provided with an explosion-proof valve; 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 15, and the protective exhaust assembly and the battery are both arranged in the accommodating space; A spacing beam (103), wherein the spacing beam (103) is arranged in the tray (101), a connecting channel (102) is formed in the spacing beam (103), and the connecting channel (102) connects the exhaust channel (21) and the explosion-proof valve.

17. The battery pack according to claim 16, characterized in that: A partition plate (104) is arranged inside the partition beam (103), and the partition plate (104) divides the connecting channel (102) into a first sub-channel (1021) and a second sub-channel (1022) extending along the length direction of the partition beam (103) and separated from each other. The battery and the protective exhaust assembly are arranged on both sides of the width of the partition beam (103), and the two protective exhaust assemblies located on both sides of the width of the partition beam (103) are respectively connected to the first sub-channel (1021) and the second sub-channel (1022).

18. The battery pack according to claim 17, characterized in that: There are two explosion-proof valves, which are arranged on the tray (101) and located at both ends of the length of the spacing beam (103), and are respectively connected to the first sub-channel (1021) and the second sub-channel (1022).

19. The battery pack according to claim 16, characterized in that: The explosion-proof valve outer cover is provided with a flow guide cover (105), and the flow guide outlet of the flow guide cover (105) extends to the bottom side edge of the tray (101).

20. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 16-19.

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