Tray assembly, battery pack, and electric device

Abstract

A tray assembly, a battery pack, and an electric device. The tray assembly comprises a tray body. The tray body is provided with a first accommodating recess for accommodating a battery assembly, an exhaust channel, and an air inlet and an exhaust port that are communicated with the exhaust channel, so that at least part of the gas in the first accommodating recess can be discharged to the outside of the tray body through the air inlet, the exhaust channel, and the exhaust port in sequence. In the height direction of the tray body, the air inlet is higher than the exhaust port.

Description

Tray assembly, battery pack and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202420442302.3, filed with the Patent Office of China on March 6, 2024, entitled “Tray Assembly, Battery Pack and Electrical Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of battery heat dissipation, and in particular to a tray assembly, a battery pack, and an electrical device. Background Art

[0004] In related technologies, a large amount of high-temperature and high-pressure gas is usually generated in the battery pack when the battery pack experiences thermal runaway. Therefore, how to efficiently discharge the high-temperature and high-pressure gas to reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, while reducing the risk of backflow and improving the safety of the entire battery pack has become the research goal of industry insiders. Summary of the Invention

[0005] The purpose of the present disclosure is to provide a tray assembly, a battery pack and an electrical device, which can efficiently discharge high-temperature and high-pressure gas when the battery pack is thermally runaway, and is not prone to the problem of gas and / or liquid reflux, thereby improving the safety of the entire battery pack.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a tray assembly, which includes a tray body, and the tray body is provided with a first receiving groove for receiving a battery assembly, an exhaust channel, and an air inlet and an exhaust port connected to the exhaust channel, so that at least part of the gas in the first receiving groove can be discharged to the outside of the tray body through the air inlet, the exhaust channel and the exhaust port in sequence; along the height direction of the tray body, the air inlet is higher than the exhaust port.

[0007] Optionally, the tray body includes a bottom plate and a frame arranged on the bottom plate, the bottom plate and the frame enclose the first receiving groove, and the frame is provided with the exhaust channel and the air inlet and the exhaust port connected to the exhaust channel.

[0008] Optionally, the frame includes two side beams arranged opposite to each other along the width direction of the tray body, and at least one of the two side beams is provided with at least one exhaust port on an outer side wall.

[0009] Optionally, the side beam includes a plurality of first cavities, and at least one first cavity is used to form the exhaust channel.

[0010] Optionally, a plurality of first transverse reinforcing ribs extending along the length direction of the pallet body and arranged at intervals along the height direction of the pallet body are provided in the side beam to form a plurality of first cavities extending along the length direction of the pallet body and arranged side by side along the height direction of the pallet body.

[0011] Optionally, baffles are provided at both ends of the at least one first cavity to block the two ends of the first cavity to form the exhaust channel.

[0012] Optionally, the first receiving groove has a plurality of sub-receiving grooves that are not connected to each other, and the sub-receiving grooves are used to accommodate the battery assembly. The tray body is provided with a plurality of the exhaust channels. The sub-receiving grooves are connected to at least one exhaust channel through at least one air inlet, and the exhaust channels connected to different sub-receiving grooves are not connected to each other.

[0013] Optionally, the frame includes two side beams arranged opposite to each other along the width direction of the tray body, the first accommodating groove has two mutually unconnected sub-accommodating grooves arranged at intervals along the width direction of the tray body, the sub-accommodating grooves are used to accommodate the battery assembly, and the side beams are provided with the exhaust channel connected to the adjacent sub-accommodating grooves through at least one air inlet, and the exhaust channels connected to different sub-accommodating grooves are not connected to each other.

[0014] Optionally, a plurality of the air inlets are provided on the inner side wall of the side beam facing the first receiving groove and are spaced apart along the length direction of the tray body.

[0015] Optionally, the frame also includes a front beam and a rear beam arranged between the two side beams, the two side beams, the front beam and the rear beam together form the first accommodating groove, the two sub-accommodating grooves include a first sub-accommodating groove and a second sub-accommodating groove, and the two side beams include a first side beam adjacent to the first sub-accommodating groove and a second side beam adjacent to the second sub-accommodating groove; at least one of the front beam and the rear beam is provided with a first intermediate transmission channel and a first inlet and a first outlet connected to the first intermediate transmission channel, the first inlet and the first outlet are both connected to the first sub-accommodating groove, and the first outlet is close to the first side beam relative to the first inlet; and / or, at least one of the front beam and the rear beam is provided with a second intermediate transmission channel and a second inlet and a second outlet connected to the second intermediate transmission channel, the second inlet and the second outlet are both connected to the second sub-accommodating groove, and the second outlet is close to the second side beam relative to the second inlet.

[0016] Optionally, the frame also includes a front beam and a rear beam arranged between the two side beams, the two side beams, the front beam and the rear beam together form the first accommodating groove, the two sub-accommodating grooves include a first sub-accommodating groove and a second sub-accommodating groove, and the two side beams include a first side beam adjacent to the first sub-accommodating groove and a second side beam adjacent to the second sub-accommodating groove; at least one of the front beam and the rear beam is provided with a first intermediate transmission channel and a first inlet, the first intermediate transmission channel is connected to the first sub-accommodating groove through the first inlet, and the first intermediate transmission channel is connected to the exhaust channel on the first side beam; and / or, at least one of the front beam and the rear beam is provided with a second intermediate transmission channel and a second inlet, the second intermediate transmission channel is connected to the second sub-accommodating groove through the second inlet, and the second intermediate transmission channel is connected to the exhaust channel on the second side beam.

[0017] Optionally, at least one of the front beam and the rear side beam includes a plurality of second cavities extending along the width direction of the pallet body and arranged side by side along the height direction of the pallet body, the first intermediate transmission channel and the second intermediate transmission channel on the front beam are formed by different second cavities on the front beam, and the first intermediate transmission channel and the second intermediate transmission channel on the rear side beam are formed by different second cavities on the rear side beam.

[0018] Optionally, the two sub-accommodating slots are separated by an intermediate beam arranged in the first accommodating slot, the intermediate beam having a first notch and a first blocking member arranged at the first notch, the first blocking member being used for allowing a first wiring harness connecting the two battery assemblies in the two sub-accommodating slots to pass through.

[0019] Optionally, the frame is divided into the first accommodating slot and the second accommodating slot by the front beam, the second accommodating slot is used to accommodate the power distribution assembly, a second notch and a second blocking piece arranged at the second notch are formed on the front beam, and the second blocking piece is used for the second wiring harness connecting the battery assembly and the power distribution assembly to pass through.

[0020] Optionally, an insulating layer is provided on the inner wall surface of the first accommodating groove.

[0021] Optionally, the tray assembly further includes a first explosion-proof valve, which is disposed at the exhaust port.

[0022] A second aspect of the present disclosure provides a battery pack, comprising the tray assembly and a battery assembly as described above.

[0023] Optionally, a second explosion-proof valve is provided on the battery assembly, and along the height direction of the tray body, the second explosion-proof valve is higher or lower than the air inlet.

[0024] Optionally, the battery assembly includes multiple battery cells, the length direction of the battery cells is parallel to the width direction of the tray body, a second explosion-proof valve is provided at the end of the battery cell adjacent to the frame of the tray body, and the air inlet is provided on the inner side wall of the frame adjacent to the end.

[0025] A third aspect of the present disclosure provides an electric device, comprising the battery pack as described above.

[0026] Through the above-described technical solution, the tray assembly provided by the present disclosure has an air inlet connected to the exhaust channel positioned higher than the exhaust port along the height of the tray body. This allows for efficient discharge of high-temperature, high-pressure gases, such as those discharged through the second explosion-proof valve of the battery assembly within the first receiving tank, to the exterior of the tray body in the event of thermal runaway of the battery pack. This reduces the likelihood of fire within the battery pack or prolongs the time it takes for an abnormality to ignite within the battery pack. Furthermore, when the gases discharged after thermal runaway enter the exhaust channel, the lower temperature outside the tray body compared to the temperature within the first receiving tank allows them to condense within the exhaust channel, forming condensed liquid that accumulates at the bottom of the exhaust channel. Therefore, by positioning the air inlet higher than the exhaust port, the condensed liquid is prevented from flowing back into the first receiving tank through the air inlet. Consequently, the tray assembly provided by the present disclosure efficiently discharges high-temperature, high-pressure gases in the event of thermal runaway while minimizing the risk of gas and / or liquid backflow, thereby enhancing the safety of the entire battery pack.

[0027] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0029] FIG1 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure;

[0030] FIG2 is a cross-sectional view of a side beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0031] FIG3 is a partial enlarged schematic diagram of position A in FIG2 ;

[0032] FIG4 is a cross-sectional view of a rear side beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0033] FIG5 is a cross-sectional view of a front beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0034] FIG6 is a schematic structural diagram of a tray assembly provided in an exemplary embodiment of the present disclosure;

[0035] FIG7 is a cross-sectional view of a side beam provided in an exemplary embodiment of the present disclosure;

[0036] FIG8 is a cross-sectional view of a tray assembly provided in an exemplary embodiment of the present disclosure;

[0037] FIG9 is a partial enlarged schematic diagram of position B in FIG8;

[0038] FIG10 is a partial enlarged schematic diagram of position C in FIG8;

[0039] FIG11 is a schematic structural diagram of a rear side beam provided in an exemplary embodiment of the present disclosure;

[0040] FIG. 12 is a cross-sectional view of a rear side sill provided in an exemplary embodiment of the present disclosure.

[0041] Explanation of Reference Numerals 1-tray body; 110-bottom plate; 120-frame; 121-side beam; 1211-first side beam; 1212-second side beam; 122-first cavity; 123-baffle; 124-front beam; 1241-second notch; 125-rear beam; 126-second cavity; 127-middle beam; 1271-first notch; 128-front beam; 130-first receiving slot; 131-sub receiving slot; 1311-first sub receiving slot; 1312-second sub receiving slot; 1 40-second accommodating tank; 2-battery assembly; 210-battery cell; 220-second explosion-proof valve; 3-exhaust channel; 310-air inlet; 320-exhaust port; 330-first wall; 4-first intermediate transmission channel; 410-first inlet; 420-first outlet; 5-second intermediate transmission channel; 510-second inlet; 520-second outlet; 6-first blocking piece; 7-power distribution assembly; 8-second blocking piece; 9-first explosion-proof valve; 10-first transverse reinforcing rib; 11-second transverse reinforcing rib. DETAILED DESCRIPTION

[0042] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0043] In the present disclosure, for the convenience of description, three coordinates are defined for the tray body of the battery pack, namely the XYZ coordinate system, wherein, as shown in FIG2 , the X direction corresponds to the width direction of the tray body, and may also refer to the length direction of the battery cells of the battery assembly in the tray body, or may also refer to the width direction of the vehicle; the Y direction corresponds to the length direction of the tray body, and may also refer to the thickness direction of the battery cells of the battery assembly in the tray body, or may also refer to the length direction of the vehicle; the Z direction corresponds to the height direction of the tray body, and may also refer to the height direction of the battery cells of the battery assembly in the tray body, or may also refer to the height direction of the vehicle. Unless otherwise specified, "inside and outside" refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first, second", etc., are used to distinguish one element from another, and do not have sequentiality or importance. In addition, in the description with reference to the accompanying drawings, the same marks in different drawings represent the same elements.

[0044] According to a first aspect of the present disclosure, a tray assembly is provided, as shown in Figures 1 to 12, the tray assembly includes a tray body 1, and the tray body 1 is provided with a first receiving groove 130 for receiving a battery assembly 2, an exhaust channel 3, and an air inlet 310 and an exhaust port 320 connected to the exhaust channel 3, so that at least part of the gas in the first receiving groove 130 can be discharged to the outside of the tray body 1 through the air inlet 310, the exhaust channel 3 and the exhaust port 320 in sequence; along the height direction of the tray body 1, the air inlet 310 is higher than the exhaust port 320.

[0045] Through the above-described technical solution, the tray assembly provided by the present disclosure, by configuring the air inlet 310 connected to the exhaust duct 3 higher than the exhaust duct 320 connected to the exhaust duct 3 along the height direction of the tray body 1, can effectively discharge high-temperature, high-pressure gas discharged from, for example, the second explosion-proof valve 220 of the battery assembly 2 within the first receiving tank 130 to the exterior of the tray body 1 in the event of thermal runaway of the battery pack, thereby reducing the risk of fire within the battery pack or prolonging the time from abnormality to fire within the battery pack. Furthermore, when the gas discharged after thermal runaway enters the exhaust duct 3, the gas is likely to condense within the exhaust duct 3, for example, because the temperature outside the tray body 1 is lower than that within the first receiving tank 130, forming condensed liquid that accumulates at the bottom of the exhaust duct 3. Therefore, by configuring the air inlet 310 higher than the exhaust duct 320, the condensed liquid is prevented from flowing back into the first receiving tank 130 through the air inlet 310. Therefore, the tray assembly provided by the present disclosure can efficiently discharge high-temperature and high-pressure gas when the battery pack thermally runs away, and is not prone to gas and / or liquid reflux problems, making the entire battery pack safer.

[0046] It should be noted that, when the pallet assembly is used in a vehicle, for example, the height of the pallet body 1 may also refer to the height of the vehicle, the length of the pallet body 1 may also refer to the length of the vehicle, and the width of the pallet body 1 may also refer to the width of the vehicle. This disclosure is specifically described using the example of a pallet assembly being used in a vehicle.

[0047] In some embodiments, referring to Figures 1 to 12, the tray body 1 may include a bottom plate 110 and a frame 120 arranged on the bottom plate 110, the bottom plate 110 and the frame 120 enclose a first receiving groove 130 for receiving the battery assembly 2, and the frame 120 is provided with an exhaust channel 3 and an air inlet 310 and an exhaust port 320 connected to the exhaust channel 3, so that at least part of the gas in the first receiving groove 130 is discharged to the outside of the tray body 1 through the air inlet 310, the exhaust channel 3 and the exhaust port 320 in sequence. Since the second explosion-proof valve 220 on the battery assembly 2 is usually arranged on both sides of the battery assembly 2 along the width direction or length direction of the tray body 1, the present disclosure is more conducive to the efficient discharge of high-temperature and high-pressure gas discharged from the second explosion-proof valve 220 of the battery assembly 2 in the first receiving groove 130, for example, to the outside of the tray body 1 by arranging the exhaust channel 3, the air inlet 310 and the exhaust port 320 on the frame 120 arranged along the width direction and length direction of the tray body 1.

[0048] It should be noted that, with reference to Figure 3, the air inlet 310 along the height direction of the pallet body 1 can be, for example, a second height b of the air inlet 310 relative to the bottom plate 110 along the height direction of the pallet body 1, that is, the vertical height distance between the center point of the air inlet 310 and the bottom plate 110 as shown in Figure 3; the exhaust port 320 along the height direction of the pallet body 1 can be, for example, a first height c of the exhaust port 320 relative to the bottom plate 110 along the height direction of the pallet body 1, that is, the vertical height distance between the center point of the exhaust port 320 and the bottom plate 110 as shown in Figure 3.

[0049] In addition, it should be noted that after the battery pack thermal runaway, the high-temperature and high-pressure gas discharged through the second explosion-proof valve 220 of the battery assembly 2 enters the exhaust channel 3 through the air inlet 310. Since the temperature inside the first receiving groove 130 is higher, and the temperature outside the frame 120, that is, the external temperature of the tray body 1 is lower than the temperature inside the first receiving groove 130, the high-temperature gas is easy to condense at, for example, the first wall 330 of the exhaust channel 3 close to the outside of the tray body 1 to produce condensed liquid, and accumulate at the bottom of the exhaust channel 3 under the action of gravity. Therefore, by constructing the first height c of the exhaust port 320 relative to the bottom plate 110 to be smaller than the second height b of the air inlet 310 connected to the exhaust channel 3 relative to the bottom plate 110, it is beneficial to discharge the condensed liquid through the exhaust port 320, and can prevent the condensed liquid from flowing back into the first receiving groove 130 through the air inlet 310. In addition, since the air pressure inside the tray body 1 is much higher than the air pressure outside the tray body 1 after the battery pack thermally runs away, the gas can be efficiently discharged to the outside of the tray body 1 through the exhaust channel 3 under the action of pressure, which can reduce the risk of the gas in the exhaust channel 3 flowing back into the first receiving groove 130, thereby effectively improving the safety of the entire battery pack.

[0050] Of course, the specific embodiment in which the exhaust duct 3, the air inlet 310, and the exhaust outlet 320 are arranged on the frame 120 is exemplary. In other embodiments not shown, the exhaust duct 3, the air inlet 310, and the exhaust outlet 320 may also be arranged on the bottom plate 110. Alternatively, the exhaust duct 3 and the air inlet 310 may be arranged on the frame 120, and the exhaust outlet 320 may be arranged on the bottom plate 110 and communicate with the exhaust duct 3 in the frame. The present disclosure does not specifically limit this variation. The purpose is to enable the height of the air inlet 310 to be configured to be higher than the height of the exhaust outlet 320 along the height direction of the tray body 1. The present disclosure is not limited to this.

[0051] In some embodiments, as shown in Figures 1 to 6, the frame 120 may include two side beams 121 arranged opposite to each other along the width direction of the pallet body 1, and at least one of the two side beams 121 is provided with at least one exhaust port 320 on the outer wall. In this way, since the pallet body 1 is protected by the frame on both sides in the width direction (or the vehicle in the width direction), by arranging the exhaust port 320 on the side beam 121, it is possible to avoid mud and water during the driving of the vehicle directly impacting the first explosion-proof valve 9 at the exhaust port 320, thereby avoiding the problem of sealing failure caused by damage to the first explosion-proof valve 9. In addition, by arranging the exhaust port 320 on the side beam 121, the exhaust port 320 can be kept away from electronic devices and / or fuel tanks arranged adjacent to the battery pack in the length direction of the pallet body 1 (which can refer to the length direction of the vehicle, or the front and rear direction of the vehicle), thereby avoiding safety hazards during exhaust, being safer and more reliable, and having a simpler structure, which is conducive to the lightweight design of the entire battery pack.

[0052] Optionally, in some embodiments, as shown in FIG8 , an exhaust port 320 may be provided on the outer side walls of both side beams 121, and a first explosion-proof valve 9 may be provided at the exhaust port 320. In addition, the exhaust port 320 and the first explosion-proof valve 9 on the two side beams 121 are symmetrically arranged with respect to the length direction of the pallet body, and the structure is simple and easy to install and manufacture.

[0053] In some embodiments, as shown in FIG. 7 , the side beam 121 may include a plurality of first cavities 122 , at least one of which is used to form an exhaust channel 3 , and has a simple structure and is easy to install and manufacture.

[0054] Among them, referring to Figure 7, a plurality of first transverse reinforcing ribs 10 extending along the length direction of the pallet body 1 and arranged at intervals along the height direction of the pallet body 1 can be set in the side beam 121 to form a plurality of first cavities 122 extending along the length direction of the pallet body 1 and arranged side by side along the height direction of the pallet body 1. In this way, the exhaust channel 3 is formed by directly utilizing the first transverse reinforcing ribs 10 in the side beam 121, the structure is simpler and the cost is lower, and at the same time it can also ensure that the entire battery pack has a higher structural strength.

[0055] In addition, at least one of the plurality of first cavities 122 forms an exhaust channel 3 , and the exhaust channel 3 is connected to the air inlet 310 and the exhaust port 320 , so that the gas in the exhaust channel 3 can be quickly discharged to the outside of the tray body 1 .

[0056] Of course, it should be noted that in other embodiments not shown, a plurality of longitudinal reinforcing ribs extending along the height direction of the pallet body 1 may be provided in the side beam 121, and the longitudinal reinforcing ribs may be arranged at intervals along the length direction of the pallet body 1. In this way, a plurality of first cavities 122 may be formed in the side beam 121, and at least one of the plurality of first cavities 122 may form an exhaust channel 3, and the exhaust channel 3 may be connected to the air inlet 310 and the exhaust port 320, thereby enabling the gas in the exhaust channel 3 to be quickly discharged to the outside of the pallet body 1. The present disclosure is not limited thereto.

[0057] Optionally, in some embodiments, as shown in FIG8 , baffles 123 are provided at both ends of at least one first cavity 122 to block the exhaust channel 3 at both ends of the first cavity 122. For example, to facilitate the lightweight design of the entire battery pack, baffles 123 may be provided at both ends of the side beam 121. The two baffles 123 are used to close both ends of at least one first cavity 122 to block the exhaust channel 3, thereby isolating the exhaust channel 3 and avoiding the risk of gas crosstalk. The structure is simple and easy to install and manufacture. Of course, it should be noted that the baffles 123 are not limited to being arranged at both ends of the side beam 121. For example, in other embodiments not shown, baffles 123 may be adaptively added at any position between the two ends of the side beam 121. The purpose is to achieve the purpose of closing both ends of the first cavity 122 connected to the first receiving groove 130 through the baffles 123 to block the exhaust channel 3 and avoid the risk of gas crosstalk. The present disclosure is not limited to this.

[0058] Among them, the present disclosure does not specifically limit the specific structure of the baffle 123 and the connection method of the side beam 121. Those skilled in the art can adaptively design it according to actual application requirements. The purpose is to achieve a stable connection between the baffle 123 and the side beam 121 while avoiding the risk of gas leakage.

[0059] In some embodiments, the first receiving groove 130 may have multiple sub-receiving grooves 131 that are not connected to each other. The sub-receiving grooves 131 are used to accommodate battery assemblies 2. The tray body 1 is provided with multiple exhaust channels 3. The sub-receiving groove 131 is connected to at least one exhaust channel 3 through at least one air inlet 310. The exhaust channels 3 connected to different sub-receiving grooves 131 are not connected to each other, so that each sub-receiving groove 131 has an independent exhaust channel 3, which can not only quickly decompose the energy of thermal runaway, but also quickly discharge the gas in multiple sub-receiving grooves 131, avoiding the risk of gas cross-cavity, reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, which is beneficial to improving the safety of the entire pack.

[0060] It should be noted that one exhaust channel 3 may have one or more air inlets 310, and a sub-accommodating tank 131 may be connected to one first exhaust channel 3 via one or more air inlets 310, or a sub-accommodating tank 131 may be connected to multiple first exhaust channels 3 via one or more air inlets 310. This disclosure does not specifically limit such variations, as long as the purpose is to enable independent exhaust and pressure relief for multiple sub-accommodating tanks 131. This disclosure is not limited thereto.

[0061] In addition, in some embodiments not shown, a plurality of mutually unconnected sub-accommodating grooves 131 can be arranged side by side along the width direction of the pallet body 1, so that the two sub-accommodating grooves 131 located near the two side beams 121 can perform intake and exhaust operations through the air inlet 310 and the exhaust port 320 of the exhaust channel 3 in the two side beams 121. At the same time, the plurality of sub-accommodating grooves 131 located in the middle (if any) can perform intake and exhaust operations through the air inlet 310 and the exhaust port 320 of the exhaust channel 3 in the rear side beam 125 that are connected to the corresponding sub-accommodating grooves 131. In addition, it should be noted that in order to avoid certain safety hazards caused by the rear side beam 125 being close to the fuel tank and the direct exhaust through the rear side beam 125, in some embodiments, a protective cover (not shown in the figure) can be provided at the exhaust port 320, and exhaust holes can be provided on the two side walls of the protective cover in the longitudinal direction of the pallet body 1, so that the gas in the protective cover can be discharged. The present disclosure is not limited to this.

[0062] The present disclosure exemplarily illustrates that two sub-receiving slots 131 are arranged side by side along the width direction of the tray body. In some embodiments, referring to Figures 1 to 8, the frame 120 may include two side beams 121 arranged opposite to each other along the width direction of the tray body 1. The first receiving slot 130 has two sub-receiving slots 131 that are not connected to each other and are arranged at intervals along the width direction of the tray body 1. The sub-receiving slots 131 are used to accommodate battery assemblies 2. The side beams 121 are provided with exhaust channels 3 that are connected to adjacent sub-receiving slots 131 through at least one air inlet 310. The exhaust channels 3 connected to different sub-receiving slots 131 are not connected to each other, so that independent exhaust operations can be performed on the two sub-receiving slots 131 through the exhaust channels 3 in the two side beams 121, avoiding the risk of gas crosstalk. In addition, thermal runaway of a single-sided sub-receiving slot 131 will not affect the other sub-receiving slot 131. The entire battery pack is safer, and the simple overall structure is conducive to the lightweight design of the entire battery pack.

[0063] Of course, it should be noted that when two sub-containing grooves 131 are arranged side by side along the width direction of the pallet body 1, the two sub-containing grooves 131 can be arranged side by side in multiple groups along the length direction of the pallet body 1. In this way, by adaptively connecting the exhaust channels 3 in the two side beams 121 with the corresponding sub-containing grooves 131 through at least one air inlet 310, the gas in multiple sub-containing grooves 131 can be quickly discharged through the exhaust channels 3 in the side beams 121, and the risk of gas cross-contamination can be avoided. In addition, thermal runaway of a single sub-containing groove 131 will not affect other sub-containing grooves 131, and the safety of the entire battery pack is higher.

[0064] Optionally, in some embodiments, as shown in FIG6 , a plurality of air inlets 310 spaced apart along the length direction of the tray body 1 may be provided on the inner side wall of the side beam 121 facing the first receiving groove 130. This can improve the gas intake efficiency when the battery pack experiences thermal runaway, and quickly guide the gas in the first receiving groove 130 into the exhaust channel 3 of the side beam 121. This can not only quickly decompose the energy of thermal runaway, but also quickly discharge the gas in the sub-receiving groove 131, thereby reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, which is beneficial to improving the safety of the entire pack.

[0065] It should be noted that the specific number of air inlets 310 is not specifically limited in this disclosure, and those skilled in the art can adaptably design it based on actual application requirements. In addition, the specific opening sizes of the air inlet 310 and the exhaust port 320 are not specifically limited in this disclosure, and those skilled in the art can adaptably design it based on actual application requirements, with the goal of ensuring that the overall battery pack has high structural strength and meets the corresponding exhaust efficiency.

[0066] In some embodiments, as shown in Figures 1 to 12, the frame 120 may also include a front beam 124 and a rear beam 125 arranged between the two side beams 121. The two side beams 121, the front beam 124 and the rear beam 125 together form a first accommodating groove 130. The two sub-accommodating grooves 131 include a first sub-accommodating groove 1311 and a second sub-accommodating groove 1312. The two side beams 121 include a first side beam 1211 adjacent to the first sub-accommodating groove 1311 and a second side beam 1212 adjacent to the second sub-accommodating groove 1312, thereby achieving independent exhaust operations of the first sub-accommodating groove 1311 and the second sub-accommodating groove 1312 through the first side beam 1211 and the second side beam 1212, respectively, to avoid the risk of gas channeling, and thermal runaway of a single-sided sub-accommodating groove 131 will not affect the other sub-accommodating groove 131, and the entire battery pack is safer.

[0067] Optionally, in some embodiments, referring to Figures 4, 5 and 11, at least one of the front beam 124 and the rear side beam 125 can be provided with a first intermediate transmission channel 4 and a first inlet 410 and a first outlet 420 connected to the first intermediate transmission channel 4, the first inlet 410 and the first outlet 420 are both connected to the first sub-receiving tank 1311, and the first outlet 420 is close to the first side beam 1211 relative to the first inlet 410, so that the energy of thermal runaway in the first sub-receiving tank 1311 can be further decomposed through the first intermediate transmission channel 4, and because the first outlet 420 is close to the first side beam 1211 relative to the first inlet 410, the gas in the first sub-receiving tank 1311 can be quickly guided to the exhaust channel 3 of the first side beam 1211 and discharged through the exhaust port 320, which is beneficial to improving the exhaust efficiency, not only reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, but also improving the safety of the entire pack.

[0068] In addition, at least one of the front beam 124 and the rear side beam 125 can be provided with a second intermediate transmission channel 5 and a second inlet 510 and a second outlet 520 connected to the second intermediate transmission channel 5. The second inlet 510 and the second outlet 520 are both connected to the second sub-containing tank 1312. The second outlet 520 is close to the second side beam 1212 relative to the second inlet 510, so that the energy of thermal runaway in the second sub-containing tank 1312 can be further decomposed through the second intermediate transmission channel 5. Moreover, since the second outlet 520 is close to the second side beam 1212 relative to the second inlet 510, the gas in the second sub-containing tank 1312 can be quickly guided to the exhaust channel 3 of the second side beam 1212 and discharged through the exhaust port 320, which is beneficial to improving the exhaust efficiency. It can not only reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, but also improve the safety of the entire pack.

[0069] Of course, the specific embodiments of the front beam 124 and the rear side beam 125 are exemplary. In other embodiments not shown in the figures, at least one of the front beam 124 and the rear side beam 125 can be provided with a first intermediate transmission channel 4 and a first inlet 410. The first intermediate transmission channel 4 is connected to the first sub-accommodating groove 1311 through the first inlet 410. The first intermediate transmission channel 4 is connected to the exhaust channel 3 on the first side beam 1211, so that the energy of thermal runaway in the first sub-accommodating groove 1311 can be further transferred through the first intermediate transmission channel 4. The battery pack is decomposed, and air holes (not shown in the figure) are opened through, for example, the connection between the front beam 124 and the first side beam 1211, and / or the connection between the rear beam 125 and the first side beam 1211, so that the gas in the first sub-receiving groove 1311 can be quickly guided to the exhaust channel 3 of the first side beam 1211 and discharged through the exhaust port 320, which is beneficial to improving the exhaust efficiency, not only reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, but also helping to improve the safety of the entire pack.

[0070] In addition, at least one of the front beam 124 and the rear side beam 125 can be provided with a second intermediate transmission channel 5 and a second inlet 510. The second intermediate transmission channel 5 is connected to the second sub-accommodation tank 1312 through the second inlet 510. The second intermediate transmission channel 5 is connected to the exhaust channel 3 on the second side beam 1212, so that the energy of thermal runaway in the second sub-accommodation tank 1312 can be further decomposed through the second intermediate transmission channel 5. In addition, an air hole (not shown in the figure) is provided through, for example, the connection between the front beam 124 and the second side beam 1212, and / or the connection between the rear side beam 125 and the second side beam 1212, so that the gas in the second sub-accommodation tank 1312 can be quickly guided to the exhaust channel 3 of the second side beam 1212 and discharged through the exhaust port 320, which is beneficial to improving the exhaust efficiency, not only reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, but also improving the safety of the entire pack. The present disclosure is not limited to this.

[0071] In some embodiments, referring to Figures 4, 5, 11 and 12, at least one of the front beam 124 and the rear side beam 125 includes a plurality of second cavities 126 extending along the width direction of the pallet body 1 and arranged side by side along the height direction of the pallet body 1. The first intermediate transmission channel 4 and the second intermediate transmission channel 5 on the front beam 124 are formed by different second cavities 126 on the front beam 124, and the first intermediate transmission channel 4 and the second intermediate transmission channel 5 on the rear side beam 125 are formed by different second cavities 126 on the rear side beam 125. In this way, the first intermediate transmission channel 4 and the second transmission channel 5 that are not connected to each other can be formed through different second cavities 126, so that the independent exhaust operations of the first sub-accommodation tank 1311 and the second sub-accommodation tank 1312 can be respectively realized through the first intermediate transmission channel 4 and the second transmission channel 5, thereby avoiding the risk of gas cross-linking. The structure is simple and is conducive to ensuring that the entire battery pack has a high structural strength.

[0072] 11 and 12 , a plurality of second transverse reinforcing ribs 11 extending along the width direction of the tray body 1 can be provided in the front beam 124 and the rear side beam 125, and the second transverse reinforcing ribs 11 are arranged at intervals along the height direction of the tray body 1. This enables a plurality of second cavities 126 to be formed in the front beam 124 and the rear side beam 125, which has a simple structure and is conducive to ensuring that the entire battery pack has a higher structural strength.

[0073] Of course, it should be noted that in other embodiments not shown, the front beam 124 and the rear side beam 125 may also be provided with a plurality of longitudinal reinforcing ribs extending along the height direction of the pallet body 1, or oblique reinforcing ribs extending along the length direction of the pallet body 1, to form different second cavities 126. The present disclosure is not limited thereto.

[0074] In some embodiments, as shown in Figures 1 to 8, the two sub-receiving grooves 131 can be separated by an intermediate beam 127 arranged in the first receiving groove 130. The intermediate beam 127 has a first notch 1271 and a first blocking member 6 arranged at the first notch 1271. The first blocking member 6 is used for allowing the first wiring harness connecting the two battery assemblies 2 in the two sub-receiving grooves 131 to pass through. In this way, the first blocking member 6 can not only realize wiring but also ensure that the two sub-receiving grooves 131 have a high degree of sealing.

[0075] Among them, the above-mentioned first blocking member 6 can be, for example, a first plastic member that fills the first notch 1271, and the first plastic member is bonded to the first notch 1271 by, for example, glue. The structure is simple and easy to install. In addition, the first plastic member can be provided with a through hole for the first wiring harness to pass through. In addition, in order to ensure a high degree of airtightness, the first wiring harness and the through hole can be coated with glue to ensure a high degree of airtightness. Of course, the specific embodiment of the above-mentioned first blocking member 6 is exemplary, and those skilled in the art can adaptively design it according to actual application requirements. The purpose is to achieve the blocking of the first notch 1271, ensure that the two sub-accommodating grooves 131 have a high degree of airtightness and can allow the first wiring harness to pass through, and the present disclosure is not limited to this.

[0076] In addition, it should be noted that the present disclosure does not specifically limit the specific structure of the first wiring harness, and its purpose is to achieve electrical connection between the two battery assemblies 2. Those skilled in the art can adaptively design it according to actual application requirements. The present disclosure is not limited thereto.

[0077] In addition, FIG8 exemplarily illustrates that there is one first notch 1271 located at the end of the middle beam 127 near the rear side beam 125. This effectively shortens the wiring length of the first wiring harnesses of the two battery assemblies 2 and improves space utilization. Of course, the number of first notches 1271 is not limited to the one shown in FIG8 . Those skilled in the art can adaptably design the specific number of first notches 1271 based on their needs, and this disclosure does not impose any specific limitations on this.

[0078] In some embodiments, as shown in Figures 1 to 8, the frame 120 can be divided into a first accommodating groove 130 and a second accommodating groove 140 by a front beam 124. The second accommodating groove 140 is used to accommodate the power distribution component 7. A second notch 1241 and a second blocking member 8 arranged at the second notch 1241 are formed on the front beam 124. The second blocking member 8 is used for allowing the second wiring harness connecting the battery assembly 2 and the power distribution component 7 to pass through. In this way, the second blocking member 8 can not only realize wiring, but also ensure that the first accommodating groove 130 and the second accommodating groove 140 have a high degree of sealing.

[0079] Among them, the above-mentioned second blocking member 8 can be, for example, a second plastic member that fills the second notch 1241, and the second plastic member is bonded to the second notch 1241 by, for example, glue. The structure is simple and easy to install. In addition, the second plastic member can be provided with a through hole for the second wiring harness to pass through. In addition, in order to ensure a high degree of airtightness, the second wiring harness and the through hole can be coated with glue to ensure a high degree of airtightness. Of course, the specific embodiment of the above-mentioned second blocking member 8 is exemplary, and those skilled in the art can adaptively design it according to actual application requirements. The purpose is to achieve the blocking of the second notch 1241, ensure that the first receiving groove 130 and the second receiving groove 140 have a high degree of airtightness and can allow the second wiring harness to pass through. The present disclosure is not limited to this.

[0080] In addition, it should be noted that the present disclosure does not specifically limit the specific structure of the second wiring harness. Its purpose is to enable electrical connection between the battery assembly 2 and the power distribution assembly 7. Those skilled in the art can design it adaptively according to actual application requirements. The present disclosure is not limited to this. In addition, the present disclosure does not specifically limit the specific structure of the power distribution assembly 7. Those skilled in the art can design it adaptively according to actual application requirements. Its purpose is to achieve, for example, power distribution to meet the power needs of various load devices.

[0081] In addition, FIG8 exemplifies that the number of second notches 1241 can be two, one located at each end of the front beam 124. This effectively shortens the wiring length of the second wiring harness between the battery assembly 2 and the power distribution assembly 7, thereby improving space utilization. Of course, the number of second notches 1241 is not limited to the two shown in FIG8 . Those skilled in the art can adaptably design the specific number of second notches 1241 based on their needs, and this disclosure does not impose any specific limitations on this.

[0082] Optionally, in some embodiments not shown, an insulating layer may be provided on the inner wall of the first receiving tank 130. For example, a mica sheet may be provided on the inner wall of the bottom plate 110 and the frame 120. The mica sheet forms the insulating layer, thereby reducing the risk of arcing or short circuits in the battery pack due to thermal runaway, thereby improving the safety of the entire battery pack. Furthermore, epoxy powder may be sprayed on the inner wall of the bottom plate 110 and the frame 120 to further insulate the first receiving tank 130 and further improve the safety of the entire battery pack.

[0083] Of course, the above specific embodiment of performing the insulation treatment on the first receiving groove 130 is exemplary, and those skilled in the art can adaptively design it according to actual application requirements. The present disclosure is not limited thereto.

[0084] Optionally, in some embodiments, referring to Figures 1 to 8, the tray assembly may further include a first explosion-proof valve 9, which is disposed at the exhaust port 320. For example, when the battery pack experiences thermal runaway, due to the high pressure in the first receiving tank 130 that accommodates the battery assembly 2, the first explosion-proof valve 9 will automatically open under the action of pressure, thereby achieving pressure relief operation (exhaust operation) in the first receiving tank 130.

[0085] Among them, the present disclosure does not limit the specific structure of the first explosion-proof valve 9. Its purpose is to be able to achieve corresponding pressure relief operations when, for example, the battery pack is thermally runaway. For example, the first explosion-proof valve 9 can adopt, for example, a piston-type explosion-proof valve, so that it can be used repeatedly and has low maintenance costs; or, the first explosion-proof valve 9 can also adopt a pin-type explosion-proof valve, which is not specifically limited in the present disclosure.

[0086] In addition, FIG1 exemplarily illustrates that the first explosion-proof valve 9 and exhaust port 320 can be located on a side of the side rail 121 near the rear rail 125. This allows the exhaust port 320 to be further away from, for example, the vehicle's electronic equipment, thereby further improving safety. Of course, the aforementioned locations of the first explosion-proof valve 9 and exhaust port 320 are exemplary. In other embodiments, those skilled in the art may adaptively design the location and specific number of exhaust ports 320 based on actual application requirements. The present disclosure is not limited thereto.

[0087] According to a second aspect of the present disclosure, a battery pack is also provided, comprising the aforementioned tray assembly and a battery pack 2. This battery pack efficiently discharges high-temperature, high-pressure gases in the event of thermal runaway, while also minimizing the risk of gas and / or liquid backflow, thereby enhancing overall battery pack safety. Furthermore, this battery pack exhibits all the benefits of the aforementioned tray assembly, which will not be further elaborated herein.

[0088] In some embodiments, as shown in Figures 1 to 10 , a second explosion-proof valve 220 may be provided on the battery assembly 2. Along the height of the tray body 1, the second explosion-proof valve 220 is positioned higher than the air inlet 310. This prevents the second explosion-proof valve 220 from directly facing the air inlet 310. This prevents the gas discharged from the second explosion-proof valve 220, or, for example, particulate matter and organic matter contained in the gas, from blocking the air inlet 310 during thermal runaway of the battery pack, thereby affecting the air intake of the exhaust duct 3. This also prevents arcing within the exhaust duct 3, thereby further improving the safety of the entire battery pack. Furthermore, by positioning the second explosion-proof valve 220 higher than the air inlet 310 along the height of the tray body 1, the overall structure becomes more compact. For example, the height of the frame 120 can be reduced, thereby reducing the height of the battery pack (with reference to the height of the tray body), thereby facilitating a lightweight design of the battery pack.

[0089] It should be noted that the height direction of the second explosion-proof valve 220 along the pallet body 1 can be, for example, a third height a of the second explosion-proof valve 220 relative to the bottom plate 110 along the height direction of the pallet body 1, that is, the vertical height distance between the center point of the second explosion-proof valve 220 and the bottom plate 110 as shown in Figure 3.

[0090] Of course, the above-mentioned embodiment in which the second height b of the air inlet 310 relative to the bottom plate 110 is constructed to be smaller than the third height a of the second explosion-proof valve 220 relative to the bottom plate 110 along the height direction of the tray body 1 is exemplary. In other embodiments not shown in the figures, the second height b of the air inlet 310 relative to the bottom plate 110 can also be constructed to be larger than the third height a of the second explosion-proof valve 220 relative to the bottom plate 110. The present disclosure does not specifically limit such deformation methods. Those skilled in the art can adaptively design according to actual application requirements. The purpose is to avoid the second explosion-proof valve 220 directly facing the air inlet 310, to prevent the gas discharged from the second explosion-proof valve 220 during thermal runaway of the battery pack, or for example, particulate matter and organic matter in the gas, from blocking the air inlet 310, thereby affecting the air intake effect of the exhaust channel 3, and at the same time avoiding arcing of the gas in the exhaust channel 3.

[0091] In addition, the present disclosure does not impose any specific restrictions on the specific structure of the second explosion-proof valve 220. Those skilled in the art can adaptively design it according to actual application requirements. The purpose is to be able to achieve corresponding pressure relief operations when, for example, the battery pack has thermal runaway. For example, the second explosion-proof valve 220 can adopt, for example, a piston-type explosion-proof valve so that it can be used repeatedly and has low maintenance costs; or, the second explosion-proof valve 220 can also adopt a pin-type explosion-proof valve, which is not specifically limited in the present disclosure.

[0092] Optionally, in some embodiments, as shown in reference figures 1 and 8, the battery assembly 2 may include a plurality of battery cells 210, the length direction of the battery cells 210 being parallel to the width direction of the tray body 1, and the ends of the battery cells 210 adjacent to the frame 120 of the tray body 1 are each provided with a second explosion-proof valve 220, and an air inlet 310 is provided on the inner side wall of the frame 120 adjacent to the end, thereby improving the air intake and exhaust efficiency, reducing the occurrence of fire in the battery pack or prolonging the time from abnormality to fire in the battery pack, which is beneficial to improving the safety of the entire pack.

[0093] As shown in FIG2 and FIG3 , each battery cell 210 of the battery assembly 2 may be provided with a second explosion-proof valve 220 at both ends along the length direction. As shown in the gas flow direction (arrow direction) of FIG8 , the present disclosure exemplarily describes the pressure relief process of the battery pack, as follows:

[0094] For example, when the battery pack is thermally runaway, the battery cell 210 can be depressurized through the second explosion-proof valves 220 on both sides, and the gas at the second explosion-proof valves 220 adjacent to the side beams 121 on both sides of the frame 120 of the battery cell 210 can directly enter the exhaust channel 3 of the side beams 121 on both sides through the air inlet 310 and be depressurized through the first explosion-proof valve 9 at the exhaust port 320 of the exhaust channel 3, thereby discharging the gas to the outside of the tray body; and the gas at the second explosion-proof valve 220 adjacent to the middle beam 127 of the frame 120 of the battery cell 210 can, for example, first enter the middle transmission channel through the inlet on the front beam 124 and / or the rear side beam 125, and then discharge the gas into the exhaust channel 3 of the side beams 121 on both sides through the outlet of the middle transmission channel, and finally be depressurized through the first explosion-proof valve 9 at the exhaust port 320 of the exhaust channel 3.

[0095] It should be noted that when the battery pack thermally runs away, the internal pressure of the battery pack is relatively large, that is, higher than the atmospheric pressure outside the battery pack. When the explosion-proof valve is in the pressure relief operation, the gas inside each battery cell 210, the first receiving tank 130 and each chamber can be quickly discharged through the explosion-proof valve to achieve corresponding pressure relief.

[0096] According to a third aspect of the present disclosure, an electrical device is also provided, comprising the aforementioned battery pack. This device efficiently discharges high-temperature, high-pressure gases in the event of thermal runaway, is less susceptible to gas and / or liquid backflow, and provides enhanced safety for the entire battery pack. Furthermore, this device possesses all the beneficial effects of the aforementioned battery pack, which will not be further elaborated in this disclosure.

[0097] It should be noted that the above-mentioned electrical equipment can be a vehicle, wherein the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Of course, in other embodiments, the above-mentioned electrical equipment can also be a portable device, a laptop computer, a ship, a spacecraft, an electric toy and an electric tool, etc., wherein the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.; the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric airplane toy, etc.; the electric tool can include a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The present disclosure is not limited to this.

[0098] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0100] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A tray assembly, characterized in that: The tray body (1) comprises a first receiving groove (130) for receiving a battery assembly (2), an exhaust channel (3), and an air inlet (310) and an exhaust port (320) in communication with the exhaust channel (3), so that at least part of the gas in the first receiving groove (130) can be discharged to the outside of the tray body (1) through the air inlet (310), the exhaust channel (3), and the exhaust port (320) in sequence; Along the height direction of the tray body (1), the air inlet (310) is higher than the air outlet (320).

2. The tray assembly according to claim 1, characterized in that: The tray body (1) comprises a bottom plate (110) and a frame (120) arranged on the bottom plate (110); the bottom plate (110) and the frame (120) enclose the first receiving groove (130); the frame (120) is provided with the exhaust channel (3) and the air inlet (310) and the exhaust port (320) communicated with the exhaust channel (3).

3. The tray assembly according to claim 2, characterized in that: The frame (120) comprises two side beams (121) arranged opposite to each other along the width direction of the tray body (1), and at least one of the two side beams (121) is provided with at least one exhaust port (320) on an outer side wall.

4. The tray assembly according to claim 3, characterized in that: The side beam (121) comprises a plurality of first cavities (122), at least one of the first cavities (122) being used to form the exhaust channel (3).

5. The tray assembly according to claim 4, characterized in that: A plurality of first transverse reinforcing ribs (10) extending along the length direction of the pallet body (1) and arranged at intervals along the height direction of the pallet body (1) are provided in the side beam (121), so as to form a plurality of first cavities (122) extending along the length direction of the pallet body (1) and arranged side by side along the height direction of the pallet body (1).

6. The tray assembly according to claim 4 or 5, characterized in that: Baffles (123) are provided at both ends of the at least one first cavity (122) to block the two ends of the first cavity (122) to form the exhaust channel (3).

7. The tray assembly according to any one of claims 1 to 6, characterized in that: The first receiving groove (130) has a plurality of mutually unconnected sub-receiving grooves (131), the sub-receiving grooves (131) being used to accommodate the battery assembly (2), the tray body (1) being provided with a plurality of the exhaust channels (3), the sub-receiving grooves (131) being connected to at least one exhaust channel (3) via at least one air inlet (310), and the exhaust channels (3) connected to different sub-receiving grooves (131) being unconnected to each other.

8. The tray assembly according to any one of claims 2 to 6, characterized in that: The frame (120) comprises two side beams (121) arranged opposite to each other along the width direction of the tray body (1); the first receiving groove (130) comprises two mutually unconnected sub-receiving grooves (131) arranged at intervals along the width direction of the tray body (1); the sub-receiving grooves (131) are used to accommodate the battery assembly (2); the side beams (121) are provided with the exhaust channel (3) connected to the adjacent sub-receiving groove (131) through at least one air inlet (310); the exhaust channels (3) connected to different sub-receiving grooves (131) are not connected to each other.

9. The tray assembly according to claim 8, characterized in that: A plurality of air inlets (310) are provided on the inner side wall of the side beam (121) facing the first receiving groove (130) and are spaced apart along the length direction of the tray body (1).

10. The tray assembly according to claim 8 or 9, characterized in that: The frame (120) further comprises a front beam (124) and a rear beam (125) arranged between the two side beams (121); the two side beams (121), the front beam (124) and the rear beam (125) together enclose the first receiving groove (130); the two sub-receiving grooves (131) comprise a first sub-receiving groove (1311) and a second sub-receiving groove (1312); the two side beams (121) comprise a first side beam (1211) adjacent to the first sub-receiving groove (1311) and a second side beam (1212) adjacent to the second sub-receiving groove (1312); At least one of the front beam (124) and the rear side beam (125) is provided with a first intermediate transmission channel (4) and a first inlet (410) and a first outlet (420) in communication with the first intermediate transmission channel (4), the first inlet (410) and the first outlet (420) both being in communication with the first sub-accommodating groove (1311), and the first outlet (420) being closer to the first side beam (1211) relative to the first inlet (410); and / or, At least one of the front beam (124) and the rear side beam (125) is provided with a second intermediate transmission channel (5) and a second inlet (510) and a second outlet (520) communicated with the second intermediate transmission channel (5); the second inlet (510) and the second outlet (520) are both communicated with the second sub-accommodating groove (1312); and the second outlet (520) is closer to the second side beam (1212) relative to the second inlet (510).

11. The tray assembly according to any one of claims 8 to 10, characterized in that: The frame (120) further comprises a front beam (124) and a rear beam (125) arranged between the two side beams (121); the two side beams (121), the front beam (124) and the rear beam (125) together enclose the first receiving groove (130); the two sub-receiving grooves (131) comprise a first sub-receiving groove (1311) and a second sub-receiving groove (1312); the two side beams (121) comprise a first side beam (1211) adjacent to the first sub-receiving groove (1311) and a second side beam (1212) adjacent to the second sub-receiving groove (1312); At least one of the front beam (124) and the rear side beam (125) is provided with a first intermediate transmission channel (4) and a first inlet (410), the first intermediate transmission channel (4) is connected to the first sub-accommodating groove (1311) through the first inlet (410), and the first intermediate transmission channel (4) is connected to the exhaust channel (3) on the first side beam (1211); and / or, At least one of the front beam (124) and the rear side beam (125) is provided with a second intermediate transmission channel (5) and a second inlet (510); the second intermediate transmission channel (5) is connected to the second sub-accommodating groove (1312) through the second inlet (510); and the second intermediate transmission channel (5) is connected to the exhaust channel (3) on the second side beam (1212).

12. The tray assembly according to claim 10 or 11, characterized in that: At least one of the front beam (124) and the rear side beam (125) includes a plurality of second cavities (126) extending along the width direction of the pallet body (1) and arranged side by side along the height direction of the pallet body (1); the first intermediate transmission channel (4) and the second intermediate transmission channel (5) on the front beam (124) are formed by different second cavities (126) on the front beam (124); and the first intermediate transmission channel (4) and the second intermediate transmission channel (5) on the rear side beam (125) are formed by different second cavities (126) on the rear side beam (125).

13. The tray assembly according to any one of claims 8 to 12, characterized in that: The two sub-accommodating grooves (131) are separated by a middle beam (127) arranged in the first accommodating groove (130); the middle beam (127) has a first notch (1271) and a first blocking member (6) arranged at the first notch (1271); the first blocking member (6) is used for allowing a first wiring harness connecting the two battery assemblies (2) in the two sub-accommodating grooves (131) to pass through.

14. The tray assembly according to any one of claims 2-6, 8-13, characterized in that: The frame (120) is divided into a first accommodating groove (130) and a second accommodating groove (140) by a front beam (124); the second accommodating groove (140) is used to accommodate a power distribution assembly (7); a second notch (1241) and a second blocking member (8) arranged at the second notch (1241) are formed on the front beam (124); the second blocking member (8) is used to allow a second wiring harness connecting the battery assembly (2) and the power distribution assembly (7) to pass through.

15. The tray assembly according to any one of claims 1 to 14, characterized in that: An insulating layer is provided on the inner wall surface of the first containing groove (130).

16. The tray assembly according to any one of claims 1 to 15, characterized in that: The tray assembly further comprises a first explosion-proof valve (9), which is arranged at the exhaust port (320).

17. A battery pack, characterized in that: It comprises the tray assembly and battery assembly (2) described in any one of claims 1 to 16.

18. The battery pack according to claim 17, characterized in that: A second explosion-proof valve (220) is provided on the battery assembly (2), and along the height direction of the tray body (1), the second explosion-proof valve (220) is higher or lower than the air inlet (310).

19. The battery pack according to claim 17 or 18, characterized in that: The battery assembly (2) comprises a plurality of battery cells (210), the length direction of the battery cells (210) being parallel to the width direction of the tray body (1), the end of the battery cell (210) adjacent to the frame (120) of the tray body (1) being provided with a second explosion-proof valve (220), and the air inlet (310) being provided on the inner side wall of the frame (120) adjacent to the end.

20. An electrical device, characterized in that: A battery pack comprising any one of claims 17 to 19.

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