Thermal runaway protection assembly, battery and vehicle

Abstract

The utility model discloses a thermal runaway protection assembly, a battery and a vehicle. A battery box body comprises a bottom protection plate, the partition plate is arranged on the bottom protection plate, the partition plate and the bottom protection plate are arranged at an interval, so that an exhaust channel is defined between the partition plate and the bottom protection plate, the partition plate is used for supporting the battery cell group, and exhaust holes corresponding to anti-explosion valves of the battery cell group are formed in the partition plate; the protection plate is arranged on the partition plate and covers the top of the exhaust hole, and the protection plate is configured to be melted through after the battery cell is in thermal runaway; and the sealing pieces are arranged on the protection plate, are distributed on the peripheral sides of the exhaust holes, and are used for sealing a gap between the protection plate and the battery cell group. High-temperature flue gas discharged after thermal runaway of the battery cell can melt through the protection plate and is discharged into the exhaust channel through the exhaust hole, the sealing performance of the exhaust channel is ensured by arranging the protection plate and the sealing piece, adhesive cannot overflow into the exhaust channel when the battery cell is assembled, the smoothness of the exhaust channel is ensured, and the safety of the battery is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a thermal runaway protection component, a battery, and a vehicle. Background Technology

[0002] In the event of thermal runaway in a battery pack, if the high-temperature gases emitted from the cells cannot escape smoothly, it will lead to deterioration of the insulation conditions inside the pack, easily causing short circuits / high-voltage arcing, and subsequently causing heat diffusion throughout the pack, resulting in personal injury and property damage to the driver and passengers. Therefore, protecting the battery pack's venting channels to ensure the smooth escape of high-temperature gases is the primary issue for ensuring battery safety. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a thermal runaway protection component, a battery, and a vehicle to ensure the unobstructed flow of exhaust channels and improve battery safety.

[0004] In a first aspect, this application provides a thermal runaway protection component, comprising:

[0005] Bottom guard plate;

[0006] A partition is provided on the bottom protective plate and spaced apart from the bottom protective plate to define an exhaust channel between the partition and the bottom protective plate. The partition is used to support the battery cell assembly, and the partition is provided with an exhaust hole corresponding to the explosion-proof valve of the battery cell assembly.

[0007] A protective plate is disposed on the partition and covers the top of the vent hole, the protective plate being configured to melt through after thermal runaway of the battery cell;

[0008] A sealing element is disposed on the protective plate and distributed around the vent hole. The sealing element is used to seal the gap between the protective plate and the battery cell assembly.

[0009] According to the thermal runaway protection component of this application, the high-temperature fumes emitted after thermal runaway of the battery cell can melt through the protective plate and be discharged into the exhaust channel through the vent. The protective plate and seals ensure that adhesive does not overflow into the exhaust channel during battery cell assembly, guaranteeing the unobstructed flow of the exhaust channel. Furthermore, the protective plate and seals also ensure the sealing of the exhaust channel, reducing the risk of thermal spread of high-temperature fumes and improving battery safety.

[0010] According to one embodiment of this application, the protective plate extends along the arrangement direction of the battery cell assembly, and the protective plate is provided with a recessed portion corresponding to the vent hole, the recessed portion extending into the vent hole.

[0011] According to one embodiment of this application, the protective panel is a thermoformed panel.

[0012] According to one embodiment of this application, the sealing element includes two sealing strips extending along the arrangement direction of the battery cell assembly, with the two sealing strips distributed at both ends in the width direction of the protective plate.

[0013] According to one embodiment of this application, a plurality of support members are provided between the bottom protective plate and the partition plate, and the plurality of support members are supported on both sides of the vent hole perpendicular to the cell assembly arrangement direction, so as to space the bottom protective plate and the partition plate apart.

[0014] According to one embodiment of this application, the thermal runaway protection component further includes insulating paper, which is disposed at the bottom of the partition and corresponds to the position of the vent hole.

[0015] According to one embodiment of this application, the insulating paper extends along the arrangement direction of the battery cell assembly, and the insulating paper is hollowed out at the position corresponding to the hole wall of the exhaust hole.

[0016] According to one embodiment of this application, a reinforcing plate is provided on the upper surface of the bottom protective plate at a position corresponding to the exhaust valve of the battery cell assembly, and a fire-resistant plate is provided on the reinforcing plate.

[0017] Secondly, this application provides a battery comprising:

[0018] Battery housing;

[0019] The thermal runaway protection component as described in any one of the first aspects is connected to the battery housing;

[0020] The battery cell assembly is installed inside the battery box and located above the thermal runaway protection component. The battery cell assembly includes multiple battery cells, and each battery cell has an explosion-proof valve at its bottom.

[0021] The beneficial effects of the battery provided in the second aspect of this application are the same as those of the battery housing provided in the first aspect, and will not be repeated here.

[0022] Thirdly, this application provides a vehicle that includes a battery as described in the second aspect, the battery being used to power the vehicle.

[0023] The beneficial effects of the vehicle provided in the third aspect of this application are the same as those of the battery provided in the first aspect, and will not be repeated here.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

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

[0026] Figure 1 This is a schematic diagram of the exploded structure of the battery provided in the embodiments of this application;

[0027] Figure 2 This is a partial cross-sectional structural diagram of the battery provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of a partial explosion structure of a battery provided in an embodiment of this application.

[0029] Figure label:

[0030] 100. Battery;

[0031] 110. Battery housing; 111. Upper housing; 112. Lower housing;

[0032] 120. Exhaust duct; 121. Bottom guard plate; 122. Partition plate; 1221. Exhaust hole; 123. Protective plate; 1231. Recessed section; 124. Sealing element; 125. Support element; 126. Fire-resistant plate; 127. Reinforcing plate; 128. Insulating paper;

[0033] 130. Battery cell assembly. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] The following is for reference. Figures 1-3 This application describes thermal runaway protection components, batteries, and vehicles according to embodiments thereof.

[0036] Please see Figure 1 This application provides a battery 100, which includes a battery housing 110, a cell pack 130, and a thermal runaway protection component.

[0037] The battery housing 110 includes an upper housing 111 and a lower housing 112.

[0038] The upper housing 111 can be flat or concave, and the lower housing 112 can be a frame. The upper housing 111 covers the top of the lower housing 112, and the periphery of the upper housing 111 is sealed to the top periphery of the lower housing 112. The thermal runaway protection assembly is connected to the battery housing 110. Specifically, the thermal runaway protection assembly is connected to the bottom of the lower housing 112, and the periphery of the thermal runaway protection assembly is sealed to the bottom periphery of the lower housing 112, so that the upper housing 111, the lower housing 112, and the thermal runaway protection assembly together form a sealed space for installing the cell assembly 130.

[0039] The cell assembly 130 includes a plurality of cells arranged sequentially. Exemplarily, the cells of a cell assembly 130 can be arranged along the length of the battery housing 110. In some examples, to increase the capacity of the battery 100, multiple cell assemblies 130 can be provided within the battery housing 110, and these multiple cell assemblies 130 can be distributed along the width of the battery housing 110. For ease of description, the arrangement direction of the multiple cells in the cell assembly 130 will be referred to as the first direction, and the arrangement direction of the multiple cell assemblies 130 will be referred to as the second direction. It is understood that the first direction is perpendicular to the second direction.

[0040] The bottom of the battery cell is equipped with an explosion-proof valve. In the event of thermal runaway, the high-temperature and high-pressure gas inside the battery cell can be discharged to the outside of the battery cell through the explosion-proof valve.

[0041] Please see Figure 1 and Figure 2 The thermal runaway protection assembly includes a bottom guard plate 121, a partition plate 122, a protective plate 123, and a seal 124.

[0042] A partition 122 is disposed on the bottom protective plate 121 and spaced apart from the bottom protective plate 121 to define an exhaust channel 120 between the partition 122 and the bottom protective plate 121. The partition 122 is used to support the battery cell assembly 130. The partition 122 is provided with an exhaust hole 1221 corresponding to the explosion-proof valve of the battery cell assembly 130.

[0043] The bottom guard plate 121 is the outermost layer of protection for the bottom of the battery box 110. It can withstand various impacts from the road surface during vehicle operation and effectively protect the internal structure of the battery box 110.

[0044] A separator 122 is arranged on the upper side of the bottom protective plate 121 and spaced apart from the bottom protective plate 121 in the height direction to form an exhaust channel 120 between the separator 122 and the bottom protective plate 121. The high-temperature and high-pressure gas discharged from the battery cell can be discharged from the battery box 110 through the exhaust channel 120 and exited through the explosion-proof valve. The battery cell assembly 130 is supported on the separator 122 and can be fixed to the top of the separator 122 and / or the protective plate 123 by adhesive. The separator 122 can be made of metal material, such as aluminum plate, to ensure that the separator 122 has the structural strength to support the battery cell assembly 130. The surface of the separator 122 can be coated with an insulating coating to ensure insulation.

[0045] The partition 122 is provided with an exhaust hole 1221. It can be understood that the position of the exhaust hole 1221 is arranged according to the arrangement of the battery cell group 130, and the size of the exhaust hole 1221 is designed according to the exhaust port diameter of the explosion-proof valve. Generally, the size of the exhaust hole 1221 is slightly larger than the exhaust port diameter of the explosion-proof valve to ensure that the high-temperature gas generated during thermal runaway can be discharged smoothly.

[0046] In some examples, the number of vent holes 1221 corresponds one-to-one with the number of battery cells, meaning that each battery cell's explosion-proof valve has a separate vent hole 1221. In other examples, one vent hole 1221 can correspond to the explosion-proof valves of multiple battery cells, meaning that in the event of thermal runaway of multiple battery cells, venting occurs through the same vent hole 1221.

[0047] A protective plate 123 is disposed on the partition 122 and covers the top of the vent 1221. The protective plate 123 is configured to be melted through after thermal runaway of the battery cell.

[0048] The protective plate 123 is made of a material with a low melting point, lower than the temperature of the thermal runaway flue gas (approximately 700°C). It can be rapidly melted through in the high-temperature environment generated by the thermal runaway of the battery cell, thereby opening the exhaust channel 120. Simultaneously, the protective plate 123 needs to possess sufficient strength and corrosion resistance to effectively protect the exhaust port 1221 under normal use, preventing dust, debris, and other contaminants from entering the exhaust channel 120. Furthermore, the protective plate 123 is relatively thin and has poor high-temperature resistance, allowing the nearby high-temperature gas to melt through it in a very short time. For example, the thickness of the protective plate 123 can be 0.4mm, 0.5mm, 0.6mm, 0.7mm, or other values ​​between 0.4mm and 0.7mm.

[0049] The protective plate 123 can be fixed to the partition 122 by adhesive or snap-fit, and covers the top of the vent 1221 to separate the vent 1221 from the space where the cell assembly 130 is located. During the assembly of the cell assembly 130, the protective plate 123 can prevent adhesive from entering the vent 1221, thereby preventing adhesive from entering the vent channel 120 through the vent 1221 and ensuring the unobstructed flow of the vent channel 120. Furthermore, in the event of thermal runaway of the cell, the high-temperature and high-pressure gas discharged from the explosion-proof valve quickly melts and enters the corresponding area of ​​the protective plate 123 into the vent channel 120. The pressure of the high-temperature and high-pressure gas is released, and it is quickly discharged through the vent channel 120. Due to the protection and sealing of the protective plate 123, the gas in the vent channel 120 is less likely to affect the explosion-proof valves of other cells through other vents 1221, reducing the probability of thermal runaway propagation.

[0050] A sealing element 124 is disposed on the protective plate 123 and distributed on the periphery of the vent hole 1221 along the second direction. The sealing element 124 is used to seal the gap between the protective plate 123 and the battery cell assembly 130.

[0051] The seals 124 are distributed around the vents 1221, meaning that each vent 1221 is located within the area surrounded by the seals 124. The seals 124 can be fixed to the protective plate 123 by adhesive or snap-fit, sealing the gap between the protective plate 123 and the battery cell assembly 130. During the assembly of the battery cell assembly 130, adhesive is applied to the outer side of the area surrounded by the seals 124 on the protective plate 123. The seals 124 prevent adhesive from entering the area surrounding them, further reducing the likelihood of adhesive overflowing into the vent channel 120.

[0052] In some embodiments, the seal 124 may be foam; see [link to documentation]. Figure 2 , Figure 2 In the uncompressed state of the seal 124, adhesive is typically applied to the upper surface of the partition 122 and / or the protective plate 123 before installing the battery cell assembly 130. The foam serves to isolate the adhesive from the area where the vent 1221 is located. When installing the battery cell assembly 130, the bottom surface of the battery cell assembly 130 first contacts the foam to form a sealing surface. As the battery cell assembly 130 is assembled downwards, the foam is compressed, causing it to adhere even more tightly to the bottom surface of the battery cell assembly 130 and the surface of the protective plate 123, ensuring the seal between the protective plate 123 and the battery cell assembly 130. The adhesive is blocked by the foam outside the area enclosed by the foam, thereby reducing the probability of adhesive overflowing into the area corresponding to the protective plate 123 and the vent 1221.

[0053] According to the battery housing 110 provided in this application embodiment, the high-temperature fumes emitted after thermal runaway of the battery cell can melt through the protective plate 123 and be discharged into the exhaust channel 120 through the exhaust port 1221. By setting the protective plate 123 and the sealing element 124, the airtightness of the exhaust channel 120 is ensured, and the adhesive will not overflow into the exhaust channel 120 during battery cell assembly, ensuring the unobstructed flow of the exhaust channel 120. Furthermore, the protective plate 123 and the sealing element 124 can also ensure the airtightness of the exhaust channel 120, reduce the risk of thermal spread of high-temperature fumes, and improve the safety of the battery 100.

[0054] The battery 100 provided according to the embodiments of this application has the same beneficial effects as the battery housing 110 described above, as it uses the battery housing 110 described above, which will not be repeated here.

[0055] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, the protective plate 123 can extend along the arrangement direction of the battery cell group 130, and the protective plate 123 is provided with a recessed portion 1231 corresponding to the exhaust hole 1221, the recessed portion 1231 extending into the exhaust hole 1221.

[0056] The protective plate 123 extends along the arrangement direction of the cell assembly 130, that is, the protective plate 123 extends along the length direction of the battery box 110. The length of the protective plate 123 can be adapted to the length of the cell assembly 130 in the arrangement direction. In actual manufacturing, the extension length of the protective plate 123 is first accurately measured according to the size of the cell assembly 130 to ensure that it can fully cover the vent hole 1221.

[0057] The protective plate 123 is provided with a recessed portion 1231 corresponding to the vent 1221. Taking the vent 1221 as a plurality of cells corresponding one-to-one with the cells of the cell group 130 as an example, when there is one cell group 130 in the battery box 110, the vent 1221 is a plurality of cells corresponding one-to-one with the explosion-proof valves of the plurality of cells of the cell group 130, and the recessed portion 1231 on the protective plate 123 can be a plurality of cells corresponding one-to-one with the vent 1221.

[0058] When multiple cell groups 130 are provided inside the battery box 110, the exhaust port 1221 is provided in multiple rows corresponding to the multiple cell groups 130. At this time, the protective plate 123 can be multiple corresponding to the cell groups 130, and each protective plate 123 is provided with multiple recessed parts 1231 corresponding to a row of exhaust ports 1221.

[0059] The shape of the recessed part 1231 can match the shape of the vent 1221. When the protective plate 123 is installed on the partition 122, the recessed part 1231 is precisely embedded in the corresponding vent 1221. The bottom surface of the recessed part 1231 forms a certain gap with the explosion-proof valve at the bottom of the battery cell. While ensuring the sealing of the vent 1221, it provides a distance for the normal opening and spraying of the explosion-proof valve, ensuring that the explosion-proof valve can be opened smoothly when the battery cell is thermally runaway.

[0060] According to some embodiments of this application, the protective plate 123 may be a thermoformed plate.

[0061] Vacuum forming sheets have low processing costs and are easy to form into recessed sections. Vacuum forming sheets generally have good chemical corrosion resistance and electrical insulation, ensuring safety while being suitable for large-scale production.

[0062] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, the sealing member 124 may include two sealing strips extending along the arrangement direction of the battery cell assembly 130, and the two sealing strips may be distributed at both ends in the width direction of the protective plate 123.

[0063] It is understood that the end of the protective plate 123 can be connected to the crossbeam used to fix the end of the battery cell assembly 130, and the end of the sealing strip can also be connected to the crossbeam at the end of the battery cell assembly 130, so that the sealing strip is set at both ends in the width direction of the protective plate 123, which can cooperate with the crossbeam to form a closed area surrounding the vent hole 1221, preventing adhesive from entering the area corresponding to the vent hole 1221.

[0064] Specifically, two sealing strips can be distributed on both sides of the recessed part 1231. While isolating the adhesive, the sealing strips ensure the overall sealing and the venting effect in case of thermal runaway of the battery cell.

[0065] Further, please refer to Figure 2 The width of the recessed portion 1231 is smaller than the width of the vent 1221, and the sealing strip can partially overlap with the projection of the vent 1221 in the height direction. By setting the portion of the sealing strip to overlap with the vent 1221, high-temperature and high-pressure gas can enter the vent 1221 more smoothly when the explosion-proof valve is opened, reducing the probability of high-temperature and high-pressure gas leaking from the sealing strip and improving the overall safety of the battery 100.

[0066] Please see Figure 1 , Figure 2 and Figure 3According to some embodiments of this application, a plurality of support members 125 are provided between the bottom protective plate 121 and the partition plate 122. The plurality of support members 125 are supported on both sides of the exhaust hole 1221 perpendicular to the arrangement direction of the battery cell group 130, so that the bottom protective plate 121 and the partition plate 122 are spaced apart.

[0067] A support member 125 is provided between the bottom protective plate 121 and the partition plate 122 to form an exhaust channel 120 at the bottom of the battery box 110. The support member 125 is preferably made of insulating, flame-retardant, and high-temperature resistant material so that it can still function normally after high-temperature and high-pressure gas enters the exhaust channel 120. For example, the support member 125 can be a flame-retardant polyurethane board or other composite material.

[0068] Support members 125 are placed on both sides of the vent holes 1221 perpendicular to the arrangement direction of the cell pack 130. It is understood that the arrangement of the vent holes 1221 has a certain impact on the overall structural strength of the separator 122. By placing support members 125 on both sides of the vent holes 1221, the stability of the entire separator 122 is ensured without affecting the smooth flow of exhaust. Specifically, the support members 125 can be evenly arranged along the arrangement direction of the vent holes 1221, so as to a certain extent, together with the separator 122 and the bottom protective plate 121, define the exhaust channel 120 extending along the arrangement direction of the cell pack 130, improving the exhaust efficiency of the exhaust channel 120, and ensuring that the bottom protective plate 121 and the separator 122 are stably supported along the entire length of the exhaust channel 120. In areas where the vent holes 1221 are densely packed, the number of support members 125 can be appropriately increased to improve the support effect in that area.

[0069] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, the thermal runaway protection assembly further includes insulating paper 128, which is disposed at the bottom of the partition 122 and corresponds to the position of the vent 1221.

[0070] Insulating paper 128 is disposed at the bottom of partition 122, that is, at the top of exhaust channel 120. Insulating paper 128 can be fixed by adhesive to the bottom of partition 122 or by clamping it to the bottom of partition 122 by support member 125.

[0071] Insulating paper 128 covers the bottom of vent 1221, and protective plate 123 covers the top of vent 1221. After the high-temperature gas melts through the protective plate 123 and enters the vent 1221, it will burn through the insulating paper 128 before entering the vent channel 120. By further setting the insulating paper 128, in conjunction with the protective plate 123, the vent 1221 is given double protection. This can prevent the high-temperature gas discharged from the thermal runaway cell from entering the cavity and flowing back to the cell area. This ensures that the vent channel 120 is unobstructed, while also preventing other cells from experiencing thermal runaway and preventing thermal diffusion of the entire package.

[0072] Among them, the insulating paper 128 can be mica paper or aramid insulating paper 128, etc., and there is no specific limitation.

[0073] Please see Figure 1 and Figure 3 According to some embodiments of this application, the insulating paper 128 extends along the arrangement direction of the battery cell assembly 130, and the insulating paper 128 is hollowed out at the position corresponding to the hole wall of the vent hole 1221.

[0074] The insulating paper 128 extends along the arrangement direction of the battery cell assembly 130, so that one insulating paper 128 can be correspondingly covered at the bottom of a row of vent holes 1221. It is understood that when there are multiple rows of vent holes 1221, the insulating paper 128 has multiple corresponding rows of vent holes 1221. In the event of thermal runaway of the battery cell, the ejected high-temperature gas needs to break through the insulating paper 128 in the area corresponding to its explosion-proof valve. By forming a weak area on the insulating paper 128 corresponding to the vent hole 1221, when the high-temperature, high-pressure gas impacts the weak area, it can be quickly torn along the perforated position, allowing the gas to be smoothly and quickly discharged into the exhaust channel 120. In some embodiments, the weak area can be formed by setting perforations at the positions corresponding to the holes in the insulating paper 128 and the vent hole 1221, or by thinning the insulating paper 128 at the positions corresponding to the vent hole 1221 to form a weak area.

[0075] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, a reinforcing plate 127 is provided on the upper surface of the bottom protective plate 121 at the position corresponding to the exhaust valve of the battery cell assembly 130, and a fire-resistant plate 126 is provided on the reinforcing plate 127.

[0076] By adding a reinforcing plate 127 to the upper surface of the bottom protective plate 121 and making the reinforcing plate 127 correspond to the exhaust valve of the cell assembly 130, the structural strength of the local area is enhanced while ensuring the lightweight design. In the event of thermal runaway of the cell, the bottom protective plate 121 at the bottom of the battery box 110 is less likely to burn through, thereby enhancing the structural stability of the exhaust channel 120.

[0077] The reinforcing plate 127 is typically a metal plate to ensure its structural strength; for example, it can be an aluminum plate. The gases emitted during thermal runaway of the battery cell may contain metal debris. By installing a fire-resistant plate 126 on the reinforcing plate 127, the fire resistance of the exhaust channel 120 is ensured, reducing the risk of thermal runaway propagation. The fire-resistant plate 126 can be a mica plate, which possesses fire-resistant and insulating properties, further enhancing the safety of the battery 100.

[0078] This application embodiment also provides a vehicle, which includes a battery 100 as described in any of the above technical solutions, the battery 100 being used to supply power to the vehicle.

[0079] It is understood that since the vehicle provided in this application embodiment includes a battery 100 as described in any of the above technical solutions, it has the technical features and beneficial effects of a battery 100 as described in any of the above technical solutions, which will not be repeated here.

[0080] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0081] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0082] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0083] In the description of this application, "multiple" means two or more.

[0084] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0085] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A thermal runaway protection assembly, comprising: include: Bottom guard plate; A partition is provided on the bottom protective plate and spaced apart from the bottom protective plate to define an exhaust channel between the partition and the bottom protective plate. The partition is used to support the battery cell assembly, and the partition is provided with an exhaust hole corresponding to the explosion-proof valve of the battery cell assembly. A protective plate is disposed on the partition and covers the top of the vent hole, the protective plate being configured to melt through after thermal runaway of the battery cell; A sealing element is disposed on the protective plate and distributed around the vent hole to seal the gap between the protective plate and the battery cell assembly.

2. The thermal runaway protection assembly of claim 1, wherein, The protective plate extends along the arrangement direction of the battery cell assembly, and the protective plate is provided with a recessed part corresponding to the vent hole, the recessed part extending into the vent hole.

3. The thermal runaway protection assembly of claim 2, wherein, The protective panel is a vacuum-formed panel.

4. The thermal runaway protection assembly of claim 2, wherein, The sealing element includes two sealing strips extending along the arrangement direction of the battery cell assembly, with the two sealing strips distributed at both ends in the width direction of the protective plate.

5. The thermal runaway protection assembly of any one of claims 1-4, wherein, Multiple support members are provided between the bottom protective plate and the partition plate. The multiple support members are supported on both sides of the exhaust hole perpendicular to the cell assembly direction, so as to keep the bottom protective plate and the partition plate apart.

6. The thermal runaway protection assembly of any one of claims 1-4, wherein, The thermal runaway protection component also includes insulating paper, which is disposed at the bottom of the partition and corresponds to the position of the vent hole.

7. The thermal runaway protection assembly of claim 6, wherein, The insulating paper extends along the arrangement direction of the battery cell assembly, and the insulating paper is cut out at the position corresponding to the hole wall of the exhaust hole.

8. The thermal runaway protection assembly of any one of claims 1-4, wherein, A reinforcing plate is provided on the upper surface of the bottom protective plate at the position corresponding to the exhaust valve of the battery cell assembly, and a fire-resistant plate is provided on the reinforcing plate.

9. A battery, characterized by include: Battery housing; The thermal runaway protection component as described in any one of claims 1-8 is connected to the battery housing; The battery cell assembly is installed inside the battery box and located above the thermal runaway protection component. The battery cell assembly includes multiple battery cells, and each battery cell has an explosion-proof valve at its bottom.

10. A vehicle characterized by comprising: Includes the battery as described in claim 9, the battery being used to power the vehicle.

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