Tray, battery pack, and vehicle

Abstract

The embodiment of the application provides a tray, a battery pack and a vehicle, and relates to the field of battery pack technology. The tray provided by the embodiment of the application comprises a frame, a bottom plate and a bottom guard plate; the bottom plate and the frame jointly form a containing cavity for containing a battery cell module; the bottom plate is provided with a pressure relief channel opposite to a battery cell explosion-proof valve; the bottom guard plate comprises a main body and an expansion part connected with each other, the expansion part is opposite to the pressure relief channel, and the expansion part protrudes away from the bottom plate when the battery cell explosion-proof valve is opened. The pressure relief channel is opposite to the battery cell explosion-proof valve, when the battery cell explosion-proof valve is opened, high-temperature injection matters are injected into the pressure relief channel, and the high-temperature injection matters are prevented from being injected onto other battery cell modules; the expansion part is opposite to the pressure relief channel, due to the impact of the high-temperature injection matters, the expansion part can protrude away from the bottom plate, the sectional area of the pressure relief channel is increased, and therefore the pressure relief efficiency is improved, and the safety of the battery pack is further improved.

Description

Technical Field

[0001] This application relates to battery pack technology, and more particularly to a tray, a battery pack, and a vehicle. Background Technology

[0002] With the rapid development of new energy electric vehicles, consumers' demand for them is increasing, and they are paying close attention to issues such as safety. As a crucial component of new energy electric vehicles, the battery pack not only affects their performance and safety but also directly impacts their market competitiveness and sustainable development.

[0003] In related technologies, the battery pack includes a tray and a cell module placed in the tray. Each cell in the cell module is usually equipped with a cell explosion-proof valve. In the event of a thermal runaway event, the cell explosion-proof valve opens to depressurize the inside of the cell module.

[0004] However, in the event of thermal runaway, one cell may eject high-temperature material from the cell's explosion-proof valve. This high-temperature material can easily spread to other cells within the battery pack, potentially causing thermal runaway in those cells and affecting the safety of the battery pack. Utility Model Content

[0005] In view of this, embodiments of this application provide a tray, a battery pack, and a vehicle that can separate high-temperature ejected material from other battery cells in the event of a thermal runaway event, thereby improving the safety of the battery pack.

[0006] To achieve the above objectives, the present application provides a tray, a battery pack, and a vehicle, which employ the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a tray, including a frame, a base plate, and a bottom guard plate;

[0008] The base plate is disposed below the frame, and the base plate and the frame together form a cavity for accommodating the battery cell module; the base plate is provided with a pressure relief channel, which is directed toward the battery cell explosion-proof valve of the battery cell module in the cavity;

[0009] The bottom protective plate is disposed below the bottom plate. The bottom protective plate includes a main body and an expansion portion connected to each other. The main body is connected to at least one of the frame and the bottom plate. The expansion portion is opposite to the pressure relief channel. When the cell explosion-proof valve is opened, the expansion portion protrudes away from the bottom plate.

[0010] In one possible implementation, the tray provided in this application embodiment has the expansion portion integrally disposed with the main body; the expansion portion is located in the middle of the main body, and the expansion portion is configured as follows:

[0011] When the cell explosion-proof valve is not open, the expansion part is flush with the main body; when the cell explosion-proof valve is open, the expansion part protrudes relative to the main body.

[0012] In one possible implementation, the tray provided in this application embodiment has a mounting opening in its main body; the expansion portion is disposed within the mounting opening, and the stiffness of the expansion portion is less than the stiffness of the main body.

[0013] In one possible implementation, the tray provided in this application embodiment further includes an isolation plate, which is connected to the base plate and is used to be disposed on the side of the battery cell module having the battery cell explosion-proof valve;

[0014] The isolation plate is provided with a spray groove, which is used to face the cell explosion-proof valve and to accommodate at least part of the cell explosion-proof valve;

[0015] The bottom wall of the spray tank is provided with a spray hole, which is connected to the pressure relief channel.

[0016] In one possible implementation, the tray provided in this application embodiment has multiple protective plates on the isolation plate and multiple spray grooves, with each protective plate corresponding to a spray hole;

[0017] The protective plate is movably disposed at the corresponding injection hole. The protective plate is configured such that when one of the cell explosion-proof valves is opened, the protective plate corresponding to the opened cell explosion-proof valve moves toward the side away from the isolation plate.

[0018] In one possible implementation, the tray provided in this application embodiment further includes a limiting plate, the limiting plate being connected to the bottom plate, the side of the limiting plate facing away from the bottom plate being connected to the isolation plate, and the limiting plate covering the top of the pressure relief channel;

[0019] The extension direction of the limiting plate is consistent with the extension direction of the pressure relief channel.

[0020] In one possible implementation, the tray provided in this application embodiment has a limiting hole on the limiting plate corresponding to the spray groove, and at least a portion of the isolation plate at the position of the spray groove protrudes into the limiting hole;

[0021] The protective plate is located inside the limiting hole.

[0022] In one possible implementation, the pallet provided in this application embodiment has a gap formed between the expansion portion and the bottom plate in the height direction of the pallet;

[0023] The base plate is provided with a vibration damping component, which is located within the gap, and the surface of the vibration damping component away from the base plate abuts against the bottom protective plate.

[0024] Secondly, embodiments of this application provide a battery pack, including a cell module and the aforementioned tray; the cell module is disposed within the receiving cavity of the tray.

[0025] Thirdly, embodiments of this application provide a vehicle, including a vehicle body and a battery pack as described above; the battery pack is used to supply power to the vehicle body.

[0026] The tray, battery pack, and vehicle provided in this application embodiment include a tray comprising a frame, a base plate, and a bottom protective plate; the base plate is disposed below the frame, and the base plate and the frame together form a receiving cavity for accommodating a battery cell module; the base plate is provided with a pressure relief channel for facing the battery cell explosion-proof valve of the battery cell module in the receiving cavity; the bottom protective plate is disposed below the base plate, and the bottom protective plate includes a main body and an expansion portion connected to each other, the main body being connected to at least one of the frame and the base plate; the expansion portion is opposite to the pressure relief channel, and the expansion portion protrudes away from the base plate when the battery cell explosion-proof valve is opened. By setting a pressure relief channel on the base plate, which is opposite to the cell explosion-proof valve (equivalent to the cell explosion-proof valve facing downwards), the cell explosion-proof valve sprays high-temperature material into the pressure relief channel when it opens, preventing the high-temperature material from spraying onto other cell modules and improving the safety of the cell modules. In addition, by setting an expansion part on the bottom plate, which is opposite to the pressure relief channel, the expansion part can protrude away from the base plate due to the impact of the high-temperature material when the cell explosion-proof valve opens. After the expansion part deforms, the cross-sectional area of ​​the pressure relief channel increases, allowing the pressure relief channel to accommodate more high-temperature material, thereby improving the pressure relief efficiency and further improving the safety of the battery pack.

[0027] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the technical solutions provided by the embodiments of this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation. Attached Figure Description

[0028] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0029] Figure 1 This is an exploded structural diagram of the battery pack provided in an embodiment of this application;

[0030] Figure 2A schematic diagram of the pressure relief channel provided in the embodiments of this application;

[0031] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0032] Figure 4 A partial structural schematic diagram of the base plate, bottom protective plate, and battery cell module provided in the embodiments of this application;

[0033] Figure 5 for Figure 4 A magnified structural diagram of part B in the middle section;

[0034] Figure 6 This is a partial structural schematic diagram of the isolation plate provided in an embodiment of this application;

[0035] Figure 7 for Figure 6 A partial cross-sectional view of the CC structure;

[0036] Figure 8 This is a schematic diagram of the battery pack provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10. Battery cell module; 20. Receiving cavity; 30. Battery cell explosion-proof valve; 40. Battery pack explosion-proof valve; 50. Gap; 100. Frame; 110. Front beam; 120. Rear beam; 130. Side beam; 140. Diagonal beam; 200. Base plate; 300. Bottom guard plate; 310. Main body; 320. Expansion section; 400. Pressure relief channel; 500. Isolation plate; 501. Spray groove; 502. Spray hole; 600. Protective plate; 700. Limiting plate; 701. Limiting hole; 800. Vibration damping component.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0041] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly 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 between 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.

[0042] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0043] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0044] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0045] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is 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 apparatus.

[0046] With the rapid development of new energy electric vehicles, consumers' demand for them is increasing, and they are paying close attention to issues such as safety. As a crucial component of new energy electric vehicles, the battery pack not only affects their performance and safety but also directly impacts their market competitiveness and sustainable development.

[0047] In related technologies, the battery pack includes a tray and a cell module placed in the tray. Each cell in the cell module is usually equipped with a cell explosion-proof valve. In the event of a thermal runaway event, the cell explosion-proof valve opens to depressurize the inside of the cell module.

[0048] However, in the event of thermal runaway, one cell may eject high-temperature material from the cell's explosion-proof valve. This high-temperature material can easily spread to other cells within the battery pack, potentially causing thermal runaway or explosion in those cells and affecting the safety of the battery pack.

[0049] In addition, consumers not only consider the safety of battery packs for new energy electric vehicles, but also pay close attention to the driving range of new energy electric vehicles, demanding battery packs with higher battery capacity while ensuring battery pack safety.

[0050] Based on the above-mentioned technical problems, this application provides a tray, a battery pack, and a vehicle. In this technical solution, the tray includes a frame, a bottom plate, and a bottom protective plate. The bottom plate is disposed below the frame, and the bottom plate and the frame together form a cavity for accommodating the battery cell module. The bottom plate is provided with a pressure relief channel, which is directed toward the battery cell explosion-proof valve of the battery cell module in the cavity. The bottom protective plate is disposed below the bottom plate, and the bottom protective plate includes a main body and an expansion portion connected to each other. The main body is connected to at least one of the frame and the bottom plate. The expansion portion is opposite to the pressure relief channel, and the expansion portion protrudes away from the bottom plate when the battery cell explosion-proof valve is opened. By setting a pressure relief channel on the base plate, which is opposite to the cell explosion-proof valve (equivalent to the cell explosion-proof valve facing downwards), the cell explosion-proof valve sprays high-temperature material into the pressure relief channel when it opens, preventing the high-temperature material from spraying onto other cell modules and improving the safety of the cell modules. In addition, by setting an expansion part on the bottom plate, which is opposite to the pressure relief channel, the expansion part can protrude away from the base plate due to the impact of the high-temperature material when the cell explosion-proof valve opens. After the expansion part deforms, the cross-sectional area of ​​the pressure relief channel increases, allowing the pressure relief channel to accommodate more high-temperature material, thereby improving the pressure relief efficiency and further improving the safety of the battery pack.

[0051] Furthermore, the battery pack provided in this application embodiment increases the space in the Z direction of the battery pack by reasonably allocating the Z-axis dimensions of the battery pack, which can accommodate larger battery cells, thereby increasing the capacity of the battery cells and thus increasing the capacity of the battery pack and improving the driving range of new energy electric vehicles.

[0052] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0053] Reference Figures 1 to 5 As shown in the embodiment of this application, a tray, a battery pack, and a vehicle are provided, wherein the tray includes a frame 100, a bottom plate 200, and a bottom protective plate 300.

[0054] The base plate 200 is located below the frame 100, and the base plate 200 and the frame 100 together form a receiving cavity 20 for accommodating the battery cell module 10. In related technologies, a battery cell module 10 usually includes multiple battery cells. This application does not limit the connection method between battery cells. The battery cell can be a blade battery cell, a cylindrical battery cell, or a rectangular battery cell. The shape of the battery cell is not limited here. Each battery cell is provided with a battery cell explosion-proof valve 30 for depressurizing the individual battery cell.

[0055] The base plate 200 is provided with a pressure relief channel 400, which is used to direct the cell explosion-proof valve 30 of the cell module 10 inside the receiving cavity 20. This means that the pressure relief channel 400 is located on the base plate 200 and faces the cell explosion-proof valve 30, which is equivalent to the cell explosion-proof valve 30 being located at the bottom of the cell. When the cell explosion-proof valve 30 is open, it sprays high-temperature ejected material downwards, such as gas or electrolyte.

[0056] The pressure relief channel 400 here can at least be positioned towards the cell explosion-proof valve 30. In related technologies, the pressure relief channel 400 is usually connected to the outside of the battery pack so that the high-temperature ejected material inside the battery pack can be ejected to the outside of the battery pack. In some specific implementations, such as Figure 1 , Figure 2 and Figure 8 As shown, the frame 100 is typically a profile with a cavity. The pressure relief channel 400 on the base plate 200 communicates with the cavity inside the frame 100. At the end of the tray, a battery pack explosion-proof valve 40 is usually provided. The frame 100 includes a front side beam 110, a rear side beam 120, and two side beams 130. The ends of the front side beam 110 and the rear side beam 120 are connected through the side beams 130. In some other implementations, a diagonal beam 140 is also provided between the side beam 130 and the front side beam 110 or the rear side beam 120. The front-rear relationship between the front side beam 110 and the rear side beam 120 is not limited here. Generally, the front side beam 110 is closer to the front of the vehicle than the rear side beam 120. The battery pack explosion-proof valve 40 is provided on the diagonal beam 140 and the front beam 110. It is understood that when the battery pack explosion-proof valve 40 is opened, it can prevent high-temperature spray from spraying onto other parts of the vehicle, thereby improving vehicle safety.

[0057] Reference Figure 4 and Figure 5 As shown, the bottom guard plate 300 is disposed below the bottom plate 200. The bottom guard plate 300 includes a main body 310 and an expansion part 320 connected to each other. The main body 310 is connected to at least one of the frame 100 and the bottom plate 200. The expansion part 320 is opposite to the pressure relief channel 400. When the cell explosion-proof valve 30 is opened, the expansion part 320 protrudes away from the bottom plate 200. Figure 4 and Figure 5 The dashed line represents the expansion section 320 protruding away from the base plate 200 after the cell explosion-proof valve 30 is opened. The protruding expansion section 320 can at least increase the cross-sectional area of ​​the pressure relief channel 400, thereby improving the flow efficiency of the high-temperature ejected material and thus improving the pressure relief efficiency.

[0058] Reference Figure 2 and Figure 3 As shown, Figure 2 The direction indicated by the middle arrow is the flow direction of the high-temperature ejected material within the pressure relief channel 400. The pressure relief channel 400 connects the explosion-proof valves 30 of each cell and the explosion-proof valve 40 of the battery pack. The high-temperature ejected material from the cell explosion-proof valves 30 passes through the pressure relief channel 400 and is ejected to the outside of the battery pack via the explosion-proof valve 40 of the battery pack.

[0059] In the above embodiment, by providing a pressure relief channel 400 on the base plate 200, the pressure relief channel 400 is opposite to the cell explosion-proof valve 30, which is equivalent to the cell explosion-proof valve 30 being set downwards. When the cell explosion-proof valve 30 is opened, it sprays high-temperature spray material into the pressure relief channel 400, preventing the high-temperature spray material from spraying onto other cell modules 10. In addition, it can also prevent the high-temperature spray material from spraying into the vehicle interior, improving the safety of the cell modules 10 and the vehicle. Furthermore, by providing an expansion part 320 on the bottom guard plate 300, the expansion part 320 is opposite to the pressure relief channel 400. When the cell explosion-proof valve 30 is opened, due to the impact of the high-temperature spray material, the expansion part 320 can protrude away from the base plate 200. After the expansion part 320 deforms, the cross-sectional area of ​​the pressure relief channel 400 can be increased, allowing the pressure relief channel 400 to accommodate more high-temperature spray material, thereby improving the pressure relief efficiency and further improving the safety of the battery pack.

[0060] In one possible implementation, the expansion portion 320 is integrally disposed with the main body 310; the expansion portion 320 is located in the middle of the main body 310, and the expansion portion 320 is configured such that: when the cell explosion-proof valve 30 is not opened, the expansion portion 320 is flush with the main body 310; when the cell explosion-proof valve 30 is opened, the expansion portion 320 protrudes relative to the main body 310.

[0061] In the above embodiments, the expansion portion 320 is integrally formed with the main body 310, which simplifies the manufacturing process of the bottom protective plate 300. The expansion portion 320 is located in the middle of the main body 310, which facilitates rapid deformation and improves pressure relief efficiency. Here, the main body 310 and the expansion portion 320 can be a composite bottom protective plate 300 made of steel plate, which has good flexibility and can be easily deformed. Furthermore, the composite bottom protective plate 300 made of steel plate has good hardness and can resist the impact of external foreign objects, thereby protecting the bottom plate 200 and the battery cell module 10.

[0062] In one possible implementation, the main body 310 is provided with a mounting port (not shown in the figure); the expansion portion 320 is disposed within the mounting port, and the stiffness of the expansion portion 320 is less than that of the main body 310. For example, when the materials of the expansion portion 320 and the main body 310 are the same, the thickness at the location of the expansion portion 320 is less than the thickness of the main body 310, which facilitates the deformation of the expansion portion 320. By setting the expansion portion 320 and the main body 310 separately, the design flexibility of the expansion portion 320 can be increased, and the inspection and replacement of the expansion portion 320 can be facilitated. In addition, the separate arrangement of the expansion portion 320 and the main body 310 means that when the cell expansion valve is opened, the expansion portion 320 corresponding to this cell explosion-proof valve 30 deforms, which facilitates accurate identification of the location of the cell that has experienced thermal runaway, and helps to improve the maintenance efficiency of the battery pack.

[0063] In other possible implementations, when the cell explosion-proof valve 30 is not open, the expansion portion 320 protrudes towards the cell module 10; when the cell explosion-proof valve 30 is open, the expansion portion 320 protrudes away from the cell module 10. This can further increase the deformable area of ​​the expansion portion 320 and improve the pressure relief efficiency.

[0064] In one possible implementation, to improve the safety of the cell explosion-proof valve 30, refer to Figures 5 to 7 As shown, it also includes an isolation plate 500, which is connected to the base plate 200, and the isolation plate 500 is used to be installed on the side of the cell module 10 with the cell explosion-proof valve 30.

[0065] The isolation plate 500 is provided with a spray groove 501, which is used to be opposite to the cell explosion-proof valve 30. The spray groove 501 is used to accommodate at least part of the cell explosion-proof valve 30, or it can be understood that at least part of the cell explosion-proof valve 30 is inserted into the spray groove 501.

[0066] The bottom wall of the spray tank 501 is provided with a spray hole 502, which is connected to the pressure relief channel 400.

[0067] In practice, the isolation plate 500 can be a mica isolation plate 500.

[0068] In the above embodiment, by setting the isolation plate 500, it is equivalent to covering the outside of the cell explosion-proof valve 30, improving the stability and safety of the cell explosion-proof valve 30, and preventing damage to the cell explosion-proof valve 30 due to vibration and pressure from other components. Furthermore, by setting the spray groove 501, at least a portion of the structure of the cell explosion-proof valve 30 is inserted into the spray groove 501, which has a certain limiting effect on the cell explosion-proof valve 30, preventing vibration or displacement. By opening the spray hole 502, the cell explosion-proof valve 30 can spray high-temperature material into the pressure relief channel 400 after opening, guiding the high-temperature material to move in an orderly manner and preventing large-scale disorderly diffusion. By guiding the material to a specific channel, the chance of the high-temperature material contacting other cells is reduced, thereby reducing the risk of cascading thermal runaway events.

[0069] In one possible implementation, the isolation plate 500 is also provided with a plurality of protective plates 600, and the spray groove 501 is provided with a plurality of protective plates 600 corresponding one-to-one with the spray hole 502.

[0070] A protective plate 600 is movably disposed at the corresponding injection port 502. The protective plate 600 is configured such that when one of the cell explosion-proof valves 30 is opened, the protective plate 600 corresponding to the opened cell explosion-proof valve 30 moves towards the side away from the isolation plate 500. The protective plate 600 and the isolation plate 500 can be flexibly connected, for example, by a rope-like connecting rope. When the protective plate 600 is subjected to an impact from the cell explosion-proof valve 30, the protective plate 600 moves towards the side away from the isolation plate 500, thereby opening the injection port 502. (Refer to...) Figure 7 As shown, when one of the protective plates 600 moves toward the side away from the isolation plate 500, the protective plate 600 at the position of the unopened cell explosion-proof valve 30 will come into close contact with the isolation plate 500 under the action of the reverse impact force, preventing high-temperature sprayed material from entering the cell that has not experienced thermal runaway and avoiding a chain thermal propagation event.

[0071] In the above embodiment, each protective plate 600 corresponds to one injection hole 502. This one-to-one design allows for more precise control of the high-temperature ejected material from the explosion-proof valve. The movement of the protective plate 600 can effectively seal or guide the high-temperature ejected material, preventing its disorderly spread. The movement of the protective plate 600 confines the high-temperature ejected material to a specific area, reducing its impact on the entire battery pack. This localization helps maintain the stability and safety of the battery pack. By precisely controlling the ejected material from each injection hole 502, the possibility of the high-temperature ejected material triggering thermal runaway in other cells is reduced, thereby lowering the risk of a chain reaction.

[0072] In one possible implementation, a limiting plate 700 is also included, which is connected to the base plate 200. The side of the limiting plate 700 facing away from the base plate 200 is connected to the isolation plate 500, and the limiting plate 700 covers the top of the pressure relief channel 400.

[0073] The extension direction of the limit plate 700 is consistent with the extension direction of the pressure relief channel 400.

[0074] In the above embodiment, the limiting plate 700 covers the top of the pressure relief channel 400, effectively guiding the high-temperature ejected material from the cell explosion-proof valve 30 along a predetermined path and preventing its disorderly diffusion. This helps reduce the impact of the ejected material on other cells, further reducing the risk of cascading thermal runaway events. As part of the tray, the limiting plate 700 enhances the stability and strength of the overall structure. This helps maintain the integrity of the battery pack in the event of a thermal runaway event, reducing the risk of structural damage. (Refer to...) Figure 5 It can be seen that the isolation plate 500 is connected to the base plate 200 through the limiting plate 700. The limiting plate 700 increases the connection area between the isolation plate 500 and the base plate 200, which helps to improve the stability of the isolation plate 500.

[0075] In one possible implementation, the limiting plate 700 has a limiting hole 701 corresponding to the spray groove 501, and at least a portion of the partition plate 500 at the position of the spray groove 501 protrudes into the limiting hole 701.

[0076] The protective plate 600 is located inside the limiting hole 701.

[0077] In the above embodiment, the separator 500 protrudes into the limiting hole 701, which can further guide and restrict the diffusion direction of the ejected material, ensuring that it flows along a preset path, thereby improving the accuracy of control. Through the protruding design of the limiting hole 701 and the separator 500, the high-temperature ejected material can be confined to a specific area, precisely controlling the diffusion path of the high-temperature ejected material, reducing the possibility of the high-temperature ejected material causing thermal runaway in other cells, thereby reducing the risk of a chain reaction. This helps maintain the stability and safety of the battery pack.

[0078] In one possible implementation, a gap 50 is formed between the expansion portion 320 and the base plate 200 in the height direction of the tray. By providing the gap 50, the expansion portion 320 can be easily deformed, thereby achieving rapid pressure relief.

[0079] The base plate 200 is provided with a vibration damping component 800, which is located within the gap 50, and the surface of the vibration damping component 800 away from the base plate 200 abuts against the bottom protective plate 300.

[0080] Here, the damping component 800 can be made of foam or rubber, and the surface of the damping component 800 away from the base plate 200 abuts against the bottom guard plate 300. When the bottom guard plate 300 vibrates, it can prevent the bottom guard plate 300 from directly contacting the base plate 200 and generating slapping noise, which helps to improve the safety of the base plate 200 and the user's experience.

[0081] In one possible implementation, the bottom protection plate 300 includes a fireproof plate, a steel plate, and an alloy plate stacked sequentially from top to bottom. The fireproof plate can be a fireproof plate coated with fire-retardant material to prevent the spread of fire inside the battery pack. The steel plate and alloy plate can increase the hardness of the bottom protection plate 300 and give it a certain degree of deformation capability. The base plate 200 can be an aluminum alloy profile plate or an aluminum alloy stamped plate, which can reduce the weight and volume of the base plate 200, thereby increasing the volume of the receiving cavity 20 to accommodate a larger capacity battery cell module 10, thereby increasing the energy density and improving the vehicle's driving range.

[0082] Optionally, this application embodiment provides a battery pack, including a cell module 10 and the aforementioned tray, wherein the cell module 10 is disposed within the receiving cavity 20 of the tray. The specific structure of the tray has been described above and will not be elaborated upon here. The battery pack provided in this application embodiment has high safety.

[0083] Here, this application embodiment also provides a vehicle, including a vehicle body and the aforementioned battery pack. By providing a vehicle with the aforementioned battery pack, vehicle safety and driving range can be improved. This application embodiment does not limit the type of vehicle.

[0084] The implementation principle of a tray, battery pack, and vehicle according to an embodiment of this application is as follows: The tray includes a frame 100, a base plate 200, and a bottom protective plate 300; the base plate 200 is disposed below the frame 100, and the base plate 200 and the frame 100 together form a receiving cavity 20 for accommodating the cell module 10; the base plate 200 is provided with a pressure relief channel 400, which is used to face the cell explosion-proof valve 30 of the cell module 10 in the receiving cavity 20; the bottom protective plate 300 is disposed below the base plate 200, and the bottom protective plate 300 includes a main body 310 and an expansion portion 320 connected to each other, the main body 310 being connected to at least one of the frame 100 and the base plate 200; the expansion portion 320 is opposite to the pressure relief channel 400, and the expansion portion 320 protrudes away from the base plate 200 when the cell explosion-proof valve 30 is opened. By providing a pressure relief channel 400 on the base plate 200, which is opposite to the cell explosion-proof valve 30 (equivalent to the cell explosion-proof valve 30 being set downwards), the cell explosion-proof valve 30 sprays high-temperature spray material into the pressure relief channel 400 when it is opened, preventing the high-temperature spray material from spraying onto other cell modules 10 and improving the safety of the cell modules 10. In addition, by providing an expansion part 320 on the bottom protective plate 300, which is opposite to the pressure relief channel 400, the expansion part 320 can protrude away from the base plate 200 due to the impact of the high-temperature spray material when the cell explosion-proof valve 30 is opened. After the expansion part 320 deforms, the cross-sectional area of ​​the pressure relief channel 400 can be increased, allowing the pressure relief channel 400 to accommodate more high-temperature spray material, thereby improving the pressure relief efficiency and further improving the safety of the battery pack.

[0085] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0086] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0087] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A tray, characterized in that, Includes frame, base plate, and bottom guard plate; The base plate is disposed below the frame, and the base plate and the frame together form a cavity for accommodating the battery cell module; the base plate is provided with a pressure relief channel, which is directed toward the battery cell explosion-proof valve of the battery cell module in the cavity; The bottom protective plate is disposed below the bottom plate. The bottom protective plate includes a main body and an expansion portion connected to each other. The main body is connected to at least one of the frame and the bottom plate. The expansion portion is opposite to the pressure relief channel. When the cell explosion-proof valve is opened, the expansion portion protrudes away from the bottom plate.

2. The pallet according to claim 1, characterized in that, The expansion portion is integrally formed with the main body; the expansion portion is located in the middle of the main body, and the expansion portion is configured as follows: When the cell explosion-proof valve is not open, the expansion part is flush with the main body; when the cell explosion-proof valve is open, the expansion part protrudes relative to the main body.

3. The tray according to claim 1, characterized in that, The main body is provided with an installation port; the expansion part is disposed in the installation port, and the stiffness of the expansion part is less than the stiffness of the main body.

4. The tray according to claim 1, characterized in that, It also includes an isolation plate, which is connected to the base plate and is used to be disposed on the side of the battery cell module having the battery cell explosion-proof valve; The isolation plate is provided with a spray groove, which is used to face the cell explosion-proof valve and to accommodate at least part of the cell explosion-proof valve; The bottom wall of the spray tank is provided with a spray hole, which is connected to the pressure relief channel.

5. The tray according to claim 4, characterized in that, The isolation plate is also provided with multiple protective plates, and the spray groove is provided with multiple spray grooves, with each protective plate corresponding to a spray hole; The protective plate is movably disposed at the corresponding injection hole. The protective plate is configured such that when one of the cell explosion-proof valves is opened, the protective plate corresponding to the opened cell explosion-proof valve moves toward the side away from the isolation plate.

6. The pallet according to claim 5, characterized in that, It also includes a limiting plate, which is connected to the bottom plate. The side of the limiting plate opposite to the bottom plate is connected to the isolation plate. The limiting plate covers the top of the pressure relief channel. The extension direction of the limiting plate is consistent with the extension direction of the pressure relief channel.

7. The pallet according to claim 6, characterized in that, The limiting plate has a limiting hole corresponding to the spray groove, and at least a portion of the isolation plate at the position of the spray groove protrudes into the limiting hole; The protective plate is located inside the limiting hole.

8. The pallet according to claim 1, characterized in that, A gap is formed between the expansion portion and the bottom plate in the height direction of the tray; The base plate is provided with a vibration damping component, which is located within the gap, and the surface of the vibration damping component away from the base plate abuts against the bottom protective plate.

9. A battery pack, characterized in that, It includes a battery cell module and a tray as described in any one of claims 1-8; the battery cell module is disposed within a receiving cavity of the tray.

10. A vehicle, characterized in that, It includes a vehicle body and a battery pack as described in claim 9; the battery pack is used to power the vehicle body.

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