Explosion-proof valve assembly, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of battery packs, and provides an anti-explosion valve assembly, a battery pack and electric equipment. The anti-explosion valve assembly comprises a mounting seat and an anti-explosion valve, a mounting groove is formed in the mounting seat, and the mounting groove comprises a bottom wall and a side wall connected to the peripheral side of the bottom wall; the anti-explosion valve is connected with the bottom wall, and the side wall is arranged on the periphery of the anti-explosion valve in a surrounding mode. According to the anti-explosion valve assembly, the mounting groove is formed, and the anti-explosion valve is arranged in the mounting groove, so that the anti-explosion valve can be protected, and damage to the anti-explosion valve is reduced.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and more particularly to an explosion-proof valve assembly, a battery pack, and an electrical device. Background Technology

[0002] The battery pack includes a housing, on which an explosion-proof valve is installed on the outer wall. In the event of thermal runaway of the battery pack, if the internal pressure becomes excessive, the explosion-proof valve can open, allowing the overpressured gas to escape. This facilitates the timely removal of excess gas from the housing and prevents the battery pack from exploding due to thermal runaway.

[0003] In related technologies, explosion-proof valves are prone to damage. Utility Model Content

[0004] This application provides an explosion-proof valve assembly, a battery pack, and an electrical device. By providing an installation groove in the explosion-proof valve assembly and placing the explosion-proof valve in the installation groove, the explosion-proof valve can be protected, reducing damage to the explosion-proof valve.

[0005] This application provides an explosion-proof valve assembly, including a mounting base and an explosion-proof valve. The mounting base has a mounting groove, which includes a bottom wall and a side wall connected to the periphery of the bottom wall. The explosion-proof valve is connected to the bottom wall, and the side wall surrounds the periphery of the explosion-proof valve.

[0006] In one possible implementation, the explosion-proof valve assembly provided in this application has a side wall facing away from the bottom wall with a distance greater than or equal to 0.5 times the distance between the side wall facing away from the bottom wall and the bottom wall, and less than or equal to 1.5 times the distance between the side wall facing away from the bottom wall and the bottom wall.

[0007] In one possible implementation, the explosion-proof valve assembly provided in this application has a side wall facing away from the bottom wall with a distance of 2mm-20mm from the bottom wall.

[0008] In one possible implementation, the explosion-proof valve assembly provided in this application has at least a portion of its sidewalls coaxially disposed with the explosion-proof valve.

[0009] In one possible implementation, the explosion-proof valve assembly provided in this application has a sidewall distance from the axis that is greater than or equal to 1.25 times the distance between the outer ring of the explosion-proof valve and the axis, and less than or equal to 2 times the distance between the outer ring of the explosion-proof valve and the axis.

[0010] In one possible implementation, the explosion-proof valve assembly provided in this application has an angle α between the line connecting the side of the sidewall facing away from the bottom wall and the axis and the plane containing the bottom wall, which is greater than or equal to 25° and less than or equal to 80°.

[0011] In one possible implementation, the explosion-proof valve assembly provided in this application has a first through hole on its bottom wall, and the explosion-proof valve passes through the first through hole.

[0012] In one possible implementation, the explosion-proof valve assembly provided in this application further includes a vent valve, which is disposed in the bottom wall.

[0013] This application also provides a battery pack, including a housing and at least one of the above-mentioned explosion-proof valve assemblies. The housing has a receiving cavity for accommodating battery cells. The mounting base of the explosion-proof valve assembly is connected to the housing, and the explosion-proof valve of the explosion-proof valve assembly is in communication with the receiving cavity.

[0014] In one possible implementation, the battery pack provided in this application includes a housing comprising a side beam and a bottom plate, the side beam and the bottom plate forming the receiving cavity, the side beam comprising an inner wall and an outer wall, a cavity between the inner wall and the outer wall, the cavity communicating with the receiving cavity, a mounting base connected to the outer wall, and an explosion-proof valve communicating with the cavity.

[0015] In one possible implementation, the battery pack provided in this application further includes a partition beam that divides the receiving cavity into multiple sub-receiving cavities. The inner wall has multiple exhaust ports that are connected to the sub-receiving cavities one by one, so that the sub-receiving cavities are connected to the cavity.

[0016] This application also provides an electrical device including the aforementioned battery pack.

[0017] In one possible implementation, the electrical equipment provided in this application is a vehicle, the battery pack includes side beams disposed opposite each other along a second direction, the mounting seat of the explosion-proof valve assembly is connected to the side beams, and the second direction intersects with the vehicle's direction of travel.

[0018] The explosion-proof valve assembly provided in this application includes a mounting base and an explosion-proof valve. The mounting base has a mounting groove, which includes a bottom wall and a side wall connected to the periphery of the bottom wall. The explosion-proof valve is connected to the bottom wall, thereby enabling a reliable connection between the explosion-proof valve and the mounting base. The side wall surrounds the periphery of the explosion-proof valve and can block some impacting objects or reduce the impact force of impacting objects on the explosion-proof valve. Thus, the explosion-proof valve can be protected and damage can be reduced. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0021] Figure 2 This is another structural schematic diagram of the battery pack provided in an embodiment of this application;

[0022] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 4 for Figure 3 An explosion diagram;

[0024] Figure 5 For along Figure 3 A cross-sectional view of the BB plane;

[0025] Figure 6 This is a schematic diagram of the structure of the mounting base in the explosion-proof valve assembly provided in the embodiments of this application;

[0026] Figure 7 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 1 ;

[0027] Figure 8 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 2 ;

[0028] Figure 9 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 3 .

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Battery Pack;

[0031] 100-Explosion-proof valve assembly;

[0032] 110 - Mounting base; 111 - Mounting groove; 1111 - Bottom wall; 1111a - First mounting hole; 1111b - First through hole; 1111c - Third through hole; 1112 - Side wall;

[0033] 120-Explosion-proof valve;

[0034] 121-Outer shell; 1211-Outer shell body; 1211a-Mounting lug; 1211b-Second mounting hole; 1212-Shell cover;

[0035] 122 - Explosion-proof parts;

[0036] 130 - Fasteners;

[0037] 140 - Vent valve;

[0038] 200- Enclosure;

[0039] 210 - Side beam; 210a - First side beam; 210b - Second side beam;

[0040] 211 - Second via;

[0041] 212 - Inner wall; 2121 - Exhaust port;

[0042] 213-Exterior wall;

[0043] 214 - Cavity;

[0044] 220 - Base Plate;

[0045] 230 - Receiving cavity; 231 - Sub-receiving cavity;

[0046] 240 - Separator beam;

[0047] 300 - Top Cover;

[0048] D1 - First spacing; D2 - Second spacing;

[0049] H1 - First altitude; H2 - Second altitude;

[0050] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0054] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0055] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0056] The battery pack includes a housing and multiple cell modules, with the multiple cell modules located inside the housing.

[0057] The enclosure is equipped with an explosion-proof valve, which is installed on the outer wall of the enclosure. In the event of thermal runaway of the battery pack, when the gas pressure inside the enclosure becomes too high, the passage of the explosion-proof valve can be opened under the gas pressure, allowing the overpressurized gas to be discharged through the passage of the explosion-proof valve. This facilitates the timely removal of overpressurized gas from the enclosure and prevents problems such as explosion of the battery pack due to thermal runaway.

[0058] In related technologies, the explosion-proof valve is completely exposed on the outside of the enclosure, making it susceptible to damage. For example, when the battery pack is used in a vehicle, it is usually installed at the bottom of the vehicle. During vehicle operation, splashed water or gravel can impact the explosion-proof valve, causing it to open abnormally or leak at the connection between the explosion-proof valve and the battery pack.

[0059] Based on this, embodiments of this application provide an explosion-proof valve assembly, a battery pack, and an electrical device. By providing an installation groove in the explosion-proof valve assembly and placing the explosion-proof valve in the installation groove, the explosion-proof valve can be protected, reducing damage to the explosion-proof valve.

[0060] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application; Figure 2 This is another structural schematic diagram of the battery pack provided in an embodiment of this application, wherein, in Figure 2 The top cover of the battery pack has been omitted.

[0061] See Figure 1 and Figure 2 As shown, the battery pack 10 includes a housing 200, a cell module (not shown in the figure), a top cover 300, and an explosion-proof valve assembly 100. The housing 200 includes a side beam 210 and a bottom plate 220, which together form a receiving cavity 230. The cell module is located in the receiving cavity 230, and the explosion-proof valve assembly 100 is connected to the side beam 210.

[0062] The housing 200 can be a cuboid structure, including a first direction X, a second direction Y, and a third direction Z. The base plate 220 is rectangular, and side beams 210 are connected to the four sides of the base plate 220. The side beams 210 can extend along the first direction X or the second direction Y. The side beams 210 are connected to the periphery of the base plate 220 to form a receiving cavity 230 with the base plate 220, in which the battery cell module can be placed. The top cover 300 is placed on the receiving cavity 230 to protect the battery cell module. The top cover 300 may also include a cold plate to dissipate heat from the battery cell module.

[0063] exist Figure 2 In the middle, the two side beams 210 extending along the first direction X are the first side beams 210a, and the two side beams 210 extending along the second direction Y are the second side beams 210b.

[0064] The explosion-proof valve assembly 100 can be mounted on the first side beam 210a and / or the second side beam 210b. Figure 2 In the middle, the explosion-proof valve assembly 100 is disposed on the first side beam 210a. When the battery cell module in the housing 200 experiences thermal runaway, the overpressure gas in the housing 200 applies pressure to the explosion-proof valve assembly 100, and the overpressure gas pushes open the explosion-proof valve assembly 100 to discharge the gas outside the containment cavity 230.

[0065] Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 for Figure 3 An explosion diagram; Figure 5 For along Figure 3 A cross-sectional view of the BB plane; Figure 6 This is a schematic diagram of the mounting base in the explosion-proof valve assembly provided in this application embodiment.

[0066] See Figures 3 to 6As shown, the explosion-proof valve assembly 100 provided in this application embodiment includes a mounting base 110 and an explosion-proof valve 120. The mounting base 110 has a mounting groove 111, which includes a bottom wall 1111 and a side wall 1112 connected to the periphery of the bottom wall 1111. The explosion-proof valve 120 is connected to the bottom wall 1111, and the side wall 1112 surrounds the periphery of the explosion-proof valve 120.

[0067] Please continue reading Figure 4 and Figure 5 As shown, the explosion-proof valve 120 includes a housing 121 and an explosion-proof component 122. The housing 121 includes a housing body 1211 and a housing cover 1212, with the explosion-proof component 122 and the housing cover 1212 disposed on opposite sides of the housing body 1211. When the gas pressure on the side of the explosion-proof component 122 is too high, the overpressured gas pushes open the explosion-proof component 122 and the housing cover 1212 to be discharged to the side of the housing cover 1212. The explosion-proof component 122 faces the inside of the receiving cavity 230 of the housing 200, and the housing cover 1212 faces the outside of the receiving cavity 230 of the housing 200.

[0068] Please continue reading Figure 4 and Figure 6 As shown, the mounting groove 111 is a recess formed on the mounting base 110. The bottom wall 1111 of the mounting groove 111 has a first mounting hole 1111a, and the outer shell body 1211 has a mounting lug 1211a. The mounting lug 1211a has a second mounting hole 1211b. The explosion-proof valve assembly 100 also includes a fastener 130, which is inserted into the second mounting hole 1211b and the first mounting hole 1111a to connect the explosion-proof valve 120 to the bottom wall 1111 of the mounting groove 111. The explosion-proof valve 120 can also be connected to the bottom wall 1111 by other connection methods, such as snap-fit, which will not be described in detail here. The bottom wall 1111 also has a first through hole 1111b, and the explosion-proof component 122 can be partially inserted into the first through hole 1111b. A second through hole 211 can be provided on the first side beam 210a. The bottom wall 1111 or the side wall 1112 of the mounting base 110 can be welded to the edge of the second through hole 211, thereby connecting the explosion-proof valve assembly 100 to the housing 200.

[0069] The bottom wall 1111 is connected to a side wall 1112. When the explosion-proof valve 120 is installed on the bottom wall 1111, the side wall 1112 surrounds the periphery of the explosion-proof valve 120. Therefore, when an impacting object is incident from the periphery of the explosion-proof valve assembly 100, some of the impacting object will hit the side wall 1112 and be bounced off by the side wall 1112, and some of the impacting object will hit the side wall 1112 and have its path changed and its impact force reduced by the side wall 1112. Only a small portion of the impacting object will directly impact the explosion-proof valve 120 in the mounting groove 111. Therefore, the side wall 1112 will reduce the impact force of the impacting object on the explosion-proof valve 120, thereby protecting the explosion-proof valve 120 and reducing damage to the explosion-proof valve 120.

[0070] The explosion-proof valve assembly 100 provided in this application embodiment includes a mounting base 110 and an explosion-proof valve 120. The mounting base 110 has a mounting groove 111, which includes a bottom wall 1111 and a side wall 1112 connected to the periphery of the bottom wall 1111. The explosion-proof valve 120 is connected to the bottom wall 1111, thereby enabling a reliable connection between the explosion-proof valve 120 and the mounting base 110. The side wall 1112 surrounds the periphery of the explosion-proof valve 120 and can block part of the impact or reduce the impact force of the impact on the explosion-proof valve 120. Thus, the explosion-proof valve 120 can be protected and damage can be reduced.

[0071] Please continue reading Figure 5 As shown, the distance between the side of the sidewall 1112 facing away from the bottom wall 1111 and the bottom wall 1111 is greater than or equal to 0.5 times the distance between the side of the explosion-proof valve 120 facing away from the bottom wall 1111 and the bottom wall 1111, and less than or equal to 1.5 times the distance between the side of the explosion-proof valve 120 facing away from the bottom wall 1111 and the bottom wall 1111.

[0072] The distance between the side wall 1112 and the bottom wall 1111 is the height of the side wall 1112 extending from the bottom wall 1111, shown as the first height H1. The side of the explosion-proof valve 120 facing away from the bottom wall 1111 is the height of the cover 1212 from the bottom wall 1111, shown as the second height H2.

[0073] When the first height H1 is too large, the height of the side wall 1112 is too high, resulting in an excessively large dimension of the mounting base 110 along the extension direction of the side wall 1112. This leads to a larger volume of the mounting base 110 and makes it inconvenient to connect the explosion-proof valve 120 to the bottom wall 1111. When the first height H1 is too small, the amount of impact material blocked is limited, resulting in a lower protective capability for the explosion-proof valve 120. Therefore, the following relationship can be satisfied between the first height H1 and the second height H2:

[0074] 0.5H2≤H1≤1.5H2

[0075] Therefore, it is convenient to install the explosion-proof valve 120 on the bottom wall 1111, and the side wall 1112 can provide good protection for the explosion-proof valve 120.

[0076] The second height H2 of the explosion-proof valve 120 is typically 4mm-15mm. Therefore, the first height H1 between the side of the side wall 1112 facing away from the bottom wall 1111 and the bottom wall 1111 can be 2mm-20mm. For example, the first height H1 can be 5mm.

[0077] Figure 7 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 1 ; Figure 8 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 2 ; Figure 9 This is a schematic diagram showing the relative positions of the explosion-proof valve and the base in the explosion-proof valve assembly provided in this application embodiment. Figure 3 .

[0078] See Figures 7 to 9 As shown, at least part of the sidewall 1112 is coaxially arranged with the explosion-proof valve 120.

[0079] exist Figure 7 In this context, the projection of the explosion-proof valve 120 onto the bottom wall 1111 is circular. The coaxial arrangement of the side wall 1112 and the explosion-proof valve 120 means that the projection of the side wall 1112 onto the bottom wall 1111 can also be approximately circular. The area of ​​the projection of the side wall 1112 onto the bottom wall 1111 is larger than the area of ​​the projection of the explosion-proof valve 120 onto the bottom wall 1111, and the center of the projection of the side wall 1112 onto the bottom wall 1111 coincides with the center of the projection of the explosion-proof valve 120 onto the bottom wall 1111, which is the coaxial axis O.

[0080] exist Figure 8 In the diagram, the projection of the explosion-proof valve 120 onto the bottom wall 1111 is a polygon. The coaxial arrangement of the side wall 1112 and the explosion-proof valve 120 means that the projection of the side wall 1112 onto the bottom wall 1111 can also be approximately a polygon. The area of ​​the projection of the side wall 1112 onto the bottom wall 1111 is larger than the area of ​​the projection of the explosion-proof valve 120 onto the bottom wall 1111, and the geometric center of the projection of the side wall 1112 onto the bottom wall 1111 coincides with the geometric center of the projection of the explosion-proof valve 120 onto the bottom wall 1111, which is the coaxial axis O.

[0081] exist Figure 9In the middle, the explosion-proof valve 120 includes two lugs 1211a, such that the outer contour of the projection of the explosion-proof valve 120 on the bottom wall 1111 is approximately elliptical, and the outer contour of the projection of the side wall 1112 on the bottom wall 1111 can also be approximately elliptical. The area of ​​the projection of the side wall 1112 on the bottom wall 1111 is larger than the area of ​​the projection of the explosion-proof valve 120 on the bottom wall 1111, and the center of the projection of the side wall 1112 on the bottom wall 1111 coincides with the center of the projection of the explosion-proof valve 120 on the bottom wall 1111, that is, the coaxial axis O.

[0082] Therefore, the distance between each point on the side wall 1112 and the outer ring of the explosion-proof valve 120 is approximately the same. Thus, the side wall 1112 can provide good protection for the explosion-proof valve 120 in multiple directions.

[0083] Please continue reading Figure 9 As shown, the distance between the side wall 1112 and the axis is greater than or equal to 1.25 times the distance between the outer ring of the explosion-proof valve 120 and the axis, and less than or equal to 2 times the distance between the outer ring of the explosion-proof valve 120 and the axis.

[0084] The distance between the side wall 1112 and the axis O is shown by the first distance D1, and the distance between the outer ring of the explosion-proof valve 120 and the axis O is shown by the second distance D2. When the first distance D1 is too large, the distance between the side wall 1112 and the outer ring of the explosion-proof valve 120 is also large, making it easier for impacting materials to enter between the side wall 1112 and the outer ring of the explosion-proof valve 120 and impact the explosion-proof valve 120. When the distance between the side wall 1112 and the outer ring of the explosion-proof valve 120 is small, the distance between the side wall 1112 and the outer ring of the explosion-proof valve 120 is small, which is inconvenient for the installation of the explosion-proof valve 120. Therefore, the first distance D1 and the second distance D2 can satisfy the following relationship:

[0085] 1.25D²≤D¹≤2D²

[0086] Therefore, it is convenient to install the explosion-proof valve 120 on the bottom wall 1111, and the side wall 1112 can provide good protection for the explosion-proof valve 120.

[0087] Please continue reading Figure 5 As shown, in one possible implementation, the angle α between the line connecting the side of the sidewall 1112 away from the bottom wall 1111 and the axis O and the plane containing the bottom wall 1111 is greater than or equal to 25° and less than or equal to 80°.

[0088] When the included angle α is too large, the first height H1 is also too large, resulting in a large first height H1 of the side wall 1112. This makes the dimension of the mounting base 110 along the extension direction of the side wall 1112 too large, leading to a large volume of the mounting base 110 and making it inconvenient to connect the explosion-proof valve 120 to the bottom wall 1111. When the included angle α is too small, the first height H1 of the side wall 1112 is also small, limiting the amount of impact that can be blocked and reducing the protective capability of the explosion-proof valve 120. Therefore, the included angle α is greater than or equal to 25° and less than or equal to 80°. For example, the included angle α can be 25°, 30°, 40°, 50°, 60°, 70°, or 80°.

[0089] Please continue reading Figure 3 and Figure 4 As shown, the explosion-proof valve assembly 100 also includes a vent valve 140, which is inserted into the bottom wall 1111.

[0090] The vent valve 140 can prevent moisture from passing through while allowing gas to pass through, and can discharge gas in the battery pack 10 when it is working normally. In this embodiment, the vent valve 140 can also be disposed in the mounting groove 111. The bottom wall 1111 of the mounting groove 111 also has a third through hole 1111c. The vent valve 140 can be installed in the third through hole 1111c. Thus, the side wall 1112 can also protect the vent valve 140.

[0091] Please continue reading Figure 5 As shown, the side beam 210 includes an inner wall 212 and an outer wall 213. A cavity 214 is provided between the inner wall 212 and the outer wall 213. The cavity 214 is connected to the receiving cavity 230. The mounting seat 110 is connected to the outer wall 213, and the explosion-proof valve 120 is used to communicate with the cavity 214.

[0092] Taking the first side beam 210a as an example, the outer wall 213 is fitted onto the outside of the inner wall 212, and there is a gap between the outer wall 213 and the bottom wall. This gap forms a cavity 214, thereby increasing the strength of the first side beam 210a. The mounting base 110 is connected to the outer wall 213, and the second through hole 211 is also located on the outer wall 213.

[0093] The overpressure gas in the receiving cavity 231 first enters the mold cavity 214, and then pushes open the explosion-proof valve 120 to discharge it outside the box 200. Thus, the pressure of the overpressure gas can be reduced by extending the path of the overpressure gas, and the impact force when the overpressure gas is discharged from the box 200 is avoided to be too large.

[0094] Please continue reading Figure 2As shown, the housing 200 also includes a partition beam 240, which divides the receiving cavity 230 into multiple sub-receiving cavities 231. Each sub-receiving cavity 231 is provided with a battery cell module. The inner wall 212 has multiple exhaust ports 2121, which are connected to the sub-receiving cavities 231 one by one, so that the sub-receiving cavities 231 are connected to the cavity 214.

[0095] The partition beam 240 can extend along either the first direction X or the second direction Y. Figure 2 In the middle, the partition beam 240 extends along the second direction Y, and the two ends of the partition beam 240 along the second direction Y are connected to two first side beams 210a arranged opposite to each other along the second direction Y. The partition beam 240 and the side beams 210 divide the receiving cavity 230 into multiple sub-receiving cavities 231, and each sub-receiving cavity 231 can be equipped with a battery cell module.

[0096] The inner wall 212 of the first side beam 210 is provided with an exhaust port 2121 at a position corresponding to each sub-accommodating cavity 231. There can be one or more exhaust ports 2121. Figure 2 In the first side beam 210, the inner wall 212 is provided with two exhaust ports 2121 at positions corresponding to each sub-receiving cavity 231. When the battery cell module in the sub-receiving cavity 231 experiences thermal runaway, gas can enter the cavity 214 of the first side beam 210a located on both sides from the exhaust ports 2121.

[0097] The exhaust ports 2121 in the multiple sub-accommodating cavities 231 are all connected to the cavity 214. That is to say, the multiple sub-accommodating cavities 231 can share the cavity 214 located in the first side beam 210a. Therefore, it is only necessary to install an explosion-proof valve 120 on the outer wall 213 of the first side beam 210a to meet the exhaust requirements of the cell modules in the multiple sub-accommodating cavities 231. Compared with the related technology that requires an explosion-proof valve to be installed in each sub-accommodating cavity, the number of explosion-proof valves 120 can be reduced, thereby reducing the cost of the battery pack 10.

[0098] The connection between the partition beam 240 and the base plate 220, as well as the connection between the partition beam 240 and the side beam 210, are equipped with seals.

[0099] The sealant can be a sealant, and sealant can be applied to the connection between the partition beam 240 and the base plate 220, and to the connection between the partition beam 240 and the side beam 210. Sealant is also applied to the connection between the partition beam 240 and the top cover 300, so that each sub-cavity 231 forms a relatively sealed chamber. Therefore, when a cell module in one sub-cavity 231 experiences thermal runaway, the pressurized gas in that sub-cavity 231 can enter the cavity 214 through the exhaust port 2121 located at the corresponding position of that sub-cavity 231, without entering the adjacent sub-cavity 231. This avoids mutual interference between the cell modules in the sub-cavities 231.

[0100] This application also provides an electrical device, including the battery pack 10 provided in the above embodiments.

[0101] The structure of the battery pack 10 has been described in detail in the above embodiments and will not be repeated here. The battery pack is used to supply power to electrical devices, which may include one or more battery packs.

[0102] Electrical equipment can be vehicles, aircraft, ferries, computers, or energy storage cabinets that use battery packs for power. Vehicles can be electric vehicles (EVs), pure electric vehicles (PEVs / BEVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), or new energy vehicles.

[0103] When the electrical equipment is a vehicle, the battery pack 10 includes a side beam 210 disposed opposite to each other along the second direction Y, and the mounting seat 110 of the explosion-proof valve assembly 100 is connected to the side beam 210.

[0104] For example, when the vehicle is traveling in the first direction X, the explosion-proof valve assembly 100 can be located on two first side beams 210a extending in the first direction X (that is, opposite in the second direction Y). The impacting object along the first direction X has a large impact force. The side wall 1112 in the explosion-proof valve assembly 100 can reduce the impacting object on the explosion-proof valve 120, thereby protecting the explosion-proof valve 120.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An explosion-proof valve assembly, characterized in that, include: Mounting base (110), wherein a mounting groove (111) is provided in the mounting base (110), the mounting groove (111) includes a bottom wall (1111) and a side wall (1112) connected to the periphery of the bottom wall (1111); An explosion-proof valve (120) is connected to the bottom wall (1111), and the side wall (1112) surrounds the periphery of the explosion-proof valve (120).

2. The explosion-proof valve assembly according to claim 1, characterized in that, The distance between the sidewall (1112) facing away from the bottom wall (1111) and the bottom wall (1111) is greater than or equal to 0.5 times the distance between the sidewall (120) facing away from the bottom wall (1111) and the bottom wall (1111), and less than or equal to 1.5 times the distance between the sidewall (120) facing away from the bottom wall (1111) and the bottom wall (1111).

3. The explosion-proof valve assembly according to claim 2, characterized in that, The distance between the sidewall (1112) facing away from the bottom wall (1111) and the bottom wall (1111) is 2mm-20mm.

4. The explosion-proof valve assembly according to claim 1, characterized in that, At least a portion of the sidewall (1112) is coaxially arranged with the explosion-proof valve (120).

5. The explosion-proof valve assembly according to claim 4, characterized in that, The distance between the sidewall (1112) and the axis is greater than or equal to 1.25 times the distance between the outer ring of the explosion-proof valve (120) and the axis, and less than or equal to 2 times the distance between the outer ring of the explosion-proof valve (120) and the axis.

6. The explosion-proof valve assembly according to claim 5, characterized in that, The angle α between the line connecting the side of the sidewall (1112) away from the bottom wall (1111) and the axis and the plane containing the bottom wall (1111) is greater than or equal to 25° and less than or equal to 80°.

7. The explosion-proof valve assembly according to claim 1, characterized in that, The bottom wall (1111) has a first through hole (1111b), and the explosion-proof valve (120) passes through the first through hole (1111b).

8. The explosion-proof valve assembly according to any one of claims 1 to 7, characterized in that, It also includes a vent valve (140) which is disposed through the bottom wall (1111).

9. A battery pack, characterized in that, The device includes a housing (200) and at least one explosion-proof valve assembly (100) as described in any one of claims 1 to 8, the housing (200) having a receiving cavity (230) for accommodating a battery cell, the mounting base (110) of the explosion-proof valve assembly (100) being connected to the housing (200), and the explosion-proof valve (120) of the explosion-proof valve assembly (100) being in communication with the receiving cavity (230).

10. The battery pack according to claim 9, characterized in that, The housing (200) includes a side beam (210) and a bottom plate (220), the side beam (210) and the bottom plate (220) enclosing the receiving cavity (230), the side beam (210) includes an inner wall (212) and an outer wall (213), a cavity (214) is formed between the inner wall (212) and the outer wall (213), the cavity (214) is connected to the receiving cavity (230), the mounting base (110) is connected to the outer wall (213), and the explosion-proof valve (120) is connected to the cavity (214).

11. The battery pack according to claim 10, characterized in that, The housing (200) also includes a partition beam (240) that divides the receiving cavity (230) into multiple sub-receiving cavities (231); The inner wall (212) has a plurality of vents (2121), and the vents (2121) are connected to the sub-accommodating cavity (231) in a one-to-one correspondence, so that the sub-accommodating cavity (231) is connected to the cavity (214).

12. An electrical appliance, characterized in that, Includes the battery pack (10) as described in any one of claims 9 to 11.

13. The electrical equipment according to claim 12, characterized in that, The electrical equipment is a vehicle, the battery pack (10) includes a side beam (210) arranged opposite to each other along a second direction, the mounting seat (110) of the explosion-proof valve assembly (100) is connected to the side beam (210), and the second direction intersects with the vehicle's direction of travel.

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