Tray assembly, battery pack and electric equipment

Abstract

The utility model relates to a tray assembly, a battery pack and electric equipment, the tray assembly comprises a tray body, the tray body is provided with a first accommodating groove for accommodating a battery unit, an exhaust channel, and an air inlet and an air outlet which are communicated with the exhaust channel; at least part of gas in the first containing groove can be exhausted out of the tray body through the gas inlet, the exhaust channel and the exhaust port in sequence; the air inlet is higher than the exhaust port in the height direction of the tray body. Through the technical scheme, the tray assembly provided by the utility model can efficiently discharge high-temperature and high-pressure gas when the battery pack is in thermal runaway, the problem of gas backflow is not easy to generate, and the safety of the whole battery pack is higher.

Description

Technical Field

[0001] 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

[0002] In the related technology, a large amount of high-temperature and high-pressure gas is usually generated in the battery pack when the battery pack thermally runs away. 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 a research goal for industry insiders. Utility Model Content

[0003] 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 increasing the safety of the entire battery pack.

[0004] In order to achieve the above-mentioned objectives, the first aspect of the present disclosure provides a tray assembly, including a tray body, the tray body being provided with a first receiving groove for receiving a battery cell, 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.

[0005] 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.

[0006] 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.

[0007] Optionally, the side beam includes a plurality of first cavities, and at least one first cavity is used to form the exhaust channel.

[0008] 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 arranged 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.

[0009] 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.

[0010] Optionally, the first receiving groove has a plurality of unconnected sub-receiving grooves therein, the sub-receiving grooves are used to accommodate the battery cells, 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.

[0011] Optionally, the frame includes two side beams arranged relatively to each other along the width direction of the tray body, the first accommodating groove has two 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 cells, and the side beams are provided with the exhaust channels 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.

[0012] 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 arranged at intervals along the length direction of the tray body.

[0013] 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.

[0014] 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.

[0015] 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, and 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.

[0016] Optionally, the two sub-accommodating grooves are separated by an intermediate beam arranged in the first accommodating groove, the intermediate beam has a first notch and a first blocking member arranged at the first notch, and the first blocking member is used for allowing a first wiring harness connecting the two battery cells in the two sub-accommodating grooves to pass through.

[0017] Optionally, the frame is divided into the first accommodating groove and the second accommodating groove by a front beam, the second accommodating groove is used to accommodate a power distribution component, 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 allowing a second wiring harness connecting the battery unit and the power distribution component to pass through.

[0018] Optionally, an insulating layer is provided on the inner wall surface of the first containing groove.

[0019] Optionally, the tray assembly further includes a first explosion-proof valve, which is disposed at the exhaust port.

[0020] A second aspect of the present disclosure provides a battery pack, comprising the tray assembly and a battery cell as described above.

[0021] Optionally, a second explosion-proof valve is provided on the battery unit, and along the height direction of the tray body, the second explosion-proof valve is higher or lower than the air inlet.

[0022] Optionally, the battery unit 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.

[0023] A third aspect of the present disclosure provides an electrical device, comprising the battery pack as described above.

[0024] Through the above technical solution, i.e., the tray assembly provided by the present disclosure, in the height direction of the tray body, by constructing the air inlet connected to the exhaust channel to be higher than the exhaust port connected to the exhaust channel, it is possible to achieve that when, for example, the battery pack is thermally runaway, the high-temperature and high-pressure gas discharged through the second explosion-proof valve of the battery cell in the first receiving groove can be efficiently discharged to the outside of the tray body, which can reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack. In addition, after the gas discharged after the thermal runaway of the battery pack enters the exhaust channel, since the external temperature of the tray body is lower than the temperature in the first receiving groove, the gas is easy to condense in, for example, the exhaust channel to produce condensed liquid and accumulate at the bottom of the exhaust channel. Therefore, by constructing the air inlet to be higher than the exhaust port, the condensed liquid can be prevented from flowing back into the first receiving groove through the air inlet. Therefore, the tray assembly provided by the present disclosure can efficiently discharge the high-temperature and high-pressure gas when the battery pack is thermally runaway, and it is not easy to cause the problem of gas and / or liquid reflux, and the safety of the whole battery pack is higher.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure;

[0028] Figure 2 is a cross-sectional view of a side beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0029] Figure 3 yes Figure 2 A local enlarged schematic diagram of the position A in the middle;

[0030] Figure 4 is a cross-sectional view of a rear side beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0031] Figure 5 is a cross-sectional view of a front beam of a battery pack provided in an exemplary embodiment of the present disclosure;

[0032] Figure 6 is a schematic structural diagram of a tray assembly provided in an exemplary embodiment of the present disclosure;

[0033] Figure 7 is a cross-sectional view of a side beam provided in an exemplary embodiment of the present disclosure;

[0034] Figure 8 is a cross-sectional view of a tray assembly provided in an exemplary embodiment of the present disclosure;

[0035] Fig. 9 yes Figure 8 A local enlarged schematic diagram of the position B in the middle;

[0036] Fig.10 yes Figure 8 A partial enlarged schematic diagram of the C position in the middle;

[0037] Fig.11 is a schematic structural diagram of a rear side beam provided in an exemplary embodiment of the present disclosure;

[0038] Fig.12 is a cross-sectional view of a rear side beam provided in an exemplary embodiment of the present disclosure.

[0039] Description of Reference Numerals

[0040] 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; 140- The second receiving groove; 2-battery unit; 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 member; 7-power distribution assembly; 8-second blocking member; 9-first explosion-proof valve; 10-first transverse reinforcing rib plate; 11-second transverse reinforcing rib plate. DETAILED DESCRIPTION

[0041] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0042] In the present disclosure, for the convenience of description, a three-coordinate system, namely, an XYZ coordinate system, is defined for the tray body of the battery pack, wherein the reference Figure 2 As shown, the X direction corresponds to the width direction of the tray body, and may also refer to the length direction of the battery cell of the battery unit 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 cell of the battery unit 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 cell of the battery unit 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 order and importance. In addition, in the description of the reference figures, the same marks in different figures represent the same elements.

[0043] According to a first aspect of the present disclosure, a tray assembly is provided, referring to Figures 1 to 12 As shown, the tray assembly includes a tray body 1, which is provided with a first receiving groove 130 for receiving the battery cell 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.

[0044] Through the above technical solution, i.e., the tray assembly provided by the present disclosure, in the height direction of the tray body 1, by constructing the air inlet 310 connected to the exhaust channel 3 to be higher than the exhaust port 320 connected to the exhaust channel 3, it is possible to achieve that when, for example, the battery pack is thermally runaway, the high-temperature and high-pressure gas discharged from the second explosion-proof valve 220 of the battery cell 2 in the first receiving groove 130 can be efficiently discharged to the outside of the tray body 1, which can reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack. In addition, after the gas discharged after the thermal runaway of the battery pack enters the exhaust channel 3, since the external temperature of the tray body 1 is lower than the temperature in the first receiving groove 130, the gas is easy to condense in, for example, the exhaust channel 3 to generate condensed liquid and accumulate at the bottom of the exhaust channel 3. Therefore, by constructing the air inlet 310 to be higher than the exhaust port 320, it is possible to prevent the condensed liquid from flowing back to the first receiving groove 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 is in thermal runaway, and is not prone to gas and / or liquid reflux problems, making the entire battery pack safer.

[0045] It should be noted that, when the above-mentioned pallet assembly is applied to a use scenario such as a vehicle, the height direction of the above-mentioned pallet body 1 can also refer to the height direction of the vehicle, the length direction of the pallet body 1 can also refer to the length direction of the vehicle, and the width direction of the pallet body 1 can also refer to the width direction of the vehicle. The present disclosure is specifically described by exemplarily applying the pallet assembly to a use scenario such as a vehicle.

[0046] In some embodiments, reference Figures 1 to 12 As shown, 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 cell 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 cell 2 is usually arranged on both sides of the battery cell 2 along the width direction or the length direction of the tray body 1, the present disclosure is more conducive to efficiently discharging the high-temperature and high-pressure gas discharged from the second explosion-proof valve 220 of the battery cell 2 in the first receiving groove 130 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 the length direction of the tray body 1.

[0047] It should be noted that the reference Figure 3As shown, the height direction of the air inlet 310 along the tray 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 tray body 1, that is, Figure 3 The vertical height distance between the center point of the air inlet 310 and the bottom plate 110 shown in the figure; the height direction of the exhaust port 320 along the tray body 1 can be, for example, a first height c of the exhaust port 320 relative to the bottom plate 110 in the height direction of the tray body 1, that is, Figure 3 The vertical height distance between the center point of the exhaust port 320 and the bottom plate 110 is shown.

[0048] In addition, it should be noted that after the high-temperature and high-pressure gas discharged through the second explosion-proof valve 220 of the battery cell 2 after the thermal runaway of the battery pack enters the exhaust channel 3 through the air inlet 310, the temperature inside the first receiving groove 130 is relatively high, while the temperature outside the frame 120, that is, the external temperature of the tray body 1 is relatively low compared to the temperature inside the first receiving groove 130. Therefore, after the high-temperature gas enters the exhaust channel 3, it 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 it 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 gas in the exhaust channel 3 flowing back into the first receiving groove 130, thereby effectively improving the safety of the entire battery pack.

[0049] Of course, the specific embodiment in which the exhaust channel 3, the air inlet 310 and the exhaust port 320 are arranged on the frame 120 is exemplary. In other embodiments not shown in the figure, the exhaust channel 3, the air inlet 310 and the exhaust port 320 can also be arranged on the bottom plate 110, or the exhaust channel 3 and the air inlet 310 are arranged on the frame 120, and the exhaust port 320 can be arranged on the bottom plate 110 and communicated with the exhaust channel 3 in the frame. The present disclosure does not specifically limit this deformation mode, and its purpose is to be able to realize that the height of the air inlet 310 is configured to be higher than the height of the exhaust port 320 along the height direction of the tray body 1. The present disclosure is not limited to this.

[0050] In some embodiments, reference Figures 1 to 6As shown, the frame 120 may include two side beams 121 arranged relatively 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 its outer side 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 in the process of driving the vehicle directly impacting the first explosion-proof valve 9 at the exhaust port 320, and avoid 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. It is safer and more reliable, and has a simpler structure, which is conducive to the lightweight design of the entire battery pack.

[0051] Optionally, in some embodiments, reference Figure 8 As shown, exhaust ports 320 may be provided on the outer side walls of the two side beams 121, and first explosion-proof valves 9 are provided at the exhaust ports 320. In addition, the exhaust ports 320 and the first explosion-proof valves 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.

[0052] In some embodiments, reference Figure 7 As shown, the side beam 121 may include a plurality of first cavities 122 , at least one of the first cavities 122 is used to form the exhaust channel 3 , and has a simple structure and is easy to install and manufacture.

[0053] Among them, reference Figure 7 As shown, 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 provided 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, which has a simpler structure and lower cost, and can also ensure that the entire battery pack has a higher structural strength.

[0054] 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 .

[0055] Of course, it should be noted that in other embodiments not shown in the figure, 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 are arranged at intervals along the length direction of the pallet body 1, so that a plurality of first cavities 122 can be formed in the side beam 121, and 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 pallet body 1. The present disclosure is not limited to this.

[0056] Optionally, in some embodiments, reference Figure 8 As shown, 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, in order to facilitate the lightweight design of the entire battery pack, baffles 123 can be provided at both ends of the side beam 121. The two baffles 123 are used to close the two ends of at least one first cavity 122 to achieve blocking of the exhaust channel 3, so that the exhaust channel 3 can be isolated to avoid the risk of gas cross-linking. The structure is simple and easy to install and manufacture. Of course, it should be noted that the above-mentioned baffles 123 are not limited to being arranged at both ends of the side beam 121. For example, in other embodiments not shown in the figure, baffles 123 can also be adaptively added at any position between the two ends of the side beam 121. The purpose is to achieve the closing of the two ends of the first cavity 122 connected to the first receiving groove 130 through the baffles 123 to achieve blocking of the exhaust channel 3 to avoid the occurrence of gas cross-linking. The present disclosure is not limited to this.

[0057] 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. Technical personnel in this field can adaptively design it according to actual application requirements. The purpose is to be able to stably connect the baffle 123 to the side beam 121 while avoiding the risk of gas leakage.

[0058] In some embodiments, the first receiving groove 130 may have a plurality of unconnected sub-receiving grooves 131, the sub-receiving grooves 131 are used to accommodate battery cells 2, the tray body 1 is provided with a plurality of exhaust channels 3, the sub-receiving groove 131 is 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 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 the plurality of sub-receiving grooves 131, avoiding the risk of gas cross-linking, 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.

[0059] It should be noted that one exhaust channel 3 may have one or more air inlets 310, and the sub-accommodating tank 131 may be connected to one first exhaust channel 3 through one or more air inlets 310, or the sub-accommodating tank 131 may be connected to multiple first exhaust channels 3 through one or more air inlets 310. The present disclosure does not specifically limit such deformation modes, and its purpose is to enable multiple sub-accommodating tanks 131 to be independently exhausted and depressurized. The present disclosure is not limited thereto.

[0060] In addition, in some embodiments not shown in the figure, a plurality of unconnected sub-accommodating grooves 131 can be arranged side by side along the width direction of the tray body 1, so that the two sub-accommodating grooves 131 located near the two side beams 121 can perform air 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, and at the same time, the plurality of sub-accommodating grooves 131 located in the middle (if any) can perform air 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 directly exhausting the gas 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 length direction of the tray body 1, so that the gas in the protective cover can be discharged. The present disclosure is not limited to this.

[0061] The present disclosure is exemplarily described in detail by arranging two sub-accommodating grooves 131 side by side along the width direction of the tray body. In some embodiments, reference is made to Figures 1 to 8 As shown, the frame 120 may include two side beams 121 arranged relatively along the width direction of the tray body 1, the first receiving groove 130 has two 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 unit 2, and the side beam 121 is provided with an exhaust channel 3 connected with the adjacent sub-receiving grooves 131 through at least one air inlet 310, and the exhaust channels 3 connected with different sub-receiving grooves 131 are not connected with each other, so that the two sub-receiving grooves 131 can be independently exhausted through the exhaust channels 3 in the two side beams 121, avoiding the risk of gas cross-talk, and thermal runaway of a single-side sub-receiving groove 131 will not affect the other sub-receiving groove 131, the whole battery pack is safer, and the simple overall structure is conducive to the lightweight design of the whole battery pack.

[0062] Of course, it should be noted that when two sub-receiving grooves 131 are arranged side by side along the width direction of the pallet body 1, the two sub-receiving grooves 131 can be arranged side by side in multiple groups along the length direction of the pallet body 1. In this way, the exhaust channels 3 in the two side beams 121 are adaptively connected to the corresponding sub-receiving grooves 131 through at least one air inlet 310. In this way, the gas in the multiple sub-receiving grooves 131 can be quickly discharged through the exhaust channels 3 in the side beams 121, and the risk of gas cross-talk can be avoided. In addition, thermal runaway of a single sub-receiving groove 131 will not affect other sub-receiving grooves 131, and the safety of the entire battery pack is higher.

[0063] Optionally, in some embodiments, reference Figure 6 As shown, a plurality of air inlets 310 spaced apart along the length direction of the tray body 1 may be provided on the inner wall of the side beam 121 facing the first receiving groove 130, thereby being able to improve the gas intake efficiency when the battery pack has thermal runaway, and to quickly guide the gas in the first receiving groove 130 to the exhaust channel 3 of the side beam 121, which 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, and is beneficial to improving the safety of the entire pack.

[0064] It should be noted that the specific number of the air inlet 310 is not specifically limited in this disclosure, and those skilled in the art can design it adaptively according to 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 design it adaptively according to actual application requirements, with the purpose of ensuring that the battery pack as a whole has a high structural strength and meets the corresponding exhaust efficiency.

[0065] In some embodiments, reference Figures 1 to 12 As shown, 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 receiving groove 130. The two sub-receiving grooves 131 include a first sub-receiving groove 1311 and a second sub-receiving groove 1312. The two side beams 121 include 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, thereby achieving independent exhaust operations on the first sub-receiving groove 1311 and the second sub-receiving groove 1312 through the first side beam 1211 and the second side beam 1212, respectively, to avoid the risk of gas cross-talk, and thermal runaway of a single-side sub-receiving groove 131 will not affect the other sub-receiving groove 131, and the entire battery pack is safer.

[0066] Optionally, in some embodiments, reference Figure 4 , Figure 5 as well as Fig.11 As shown, 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 groove 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 groove 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 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 can it reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, but also is beneficial to improving the safety of the entire pack.

[0067] 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-receiving groove 1312, and 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-receiving groove 1312 can be further decomposed through the second intermediate transmission channel 5, and because the second outlet 520 is close to the second side beam 1212 relative to the second inlet 510, the gas in the second sub-receiving groove 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 can it reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, but also is beneficial to improving the safety of the entire pack.

[0068] 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 figure, 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 an air hole (not shown in the figure) is 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 can it reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, but also is beneficial to improving the safety of the entire pack.

[0069] In addition, at least one of the front beam 124 and the rear side beam 125 may 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 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, so that the energy of thermal runaway in the second sub-accommodation groove 1312 can be further decomposed through the second intermediate transmission channel 5, and 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 groove 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 conducive to improving the exhaust efficiency, not only can reduce the occurrence of fire in the battery pack or prolong the time from abnormality to fire in the battery pack, but also help improve the safety of the whole pack. The present disclosure is not limited to this.

[0070] In some embodiments, reference Figure 4 , Figure 5 , Fig.11 as well as Fig.12As shown, 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, which are not connected to each other, can be formed through different second cavities 126, so that the first sub-accommodating groove 1311 and the second sub-accommodating groove 1312 can be independently exhausted through the first intermediate transmission channel 4 and the second transmission channel 5, respectively, to avoid 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.

[0071] Among them, reference Fig.11 and Fig.12 As shown, a plurality of second transverse reinforcing ribs 11 extending along the width direction of the pallet 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 pallet body 1, so that a plurality of second cavities 126 can 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 high structural strength.

[0072] Of course, it should be noted that in other embodiments not shown in the figure, 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.

[0073] In some embodiments, reference Figures 1 to 8 As shown, 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 cells 2 in the two sub-receiving grooves 131 to pass through. In this way, the first blocking member 6 can not only realize the routing but also ensure that the two sub-receiving grooves 131 have a high degree of sealing.

[0074] Among them, the above-mentioned first blocking member 6 can be, for example, a first plastic member filled in the first notch 1271, and the first plastic member is bonded to the first notch 1271 by, for example, glue, and 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.

[0075] 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 units 2, and those skilled in the art can design it adaptively according to actual application requirements. The present disclosure is not limited thereto.

[0076] also, Figure 8 The example shows that the number of the first notch 1271 is one and is opened at the end of the middle beam 127 close to the rear side beam 125, so that the wiring length of the first wire harness of the two battery units 2 can be effectively shortened, and the space utilization rate can be improved. Of course, the number of the first notch 1271 is not limited to Figure 8 One is shown in the figure, and those skilled in the art can adaptively design the specific number of the first notches 1271 according to the needs, and the present disclosure does not make any specific limitation on this.

[0077] In some embodiments, reference Figures 1 to 8 As shown, the frame 120 can be divided into a first accommodating groove 130 and a second accommodating groove 140 by the 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 unit 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.

[0078] Among them, the second sealing member 8 can be, for example, a second plastic member filled in the second notch 1241, and the second plastic member is bonded to the second notch 1241 by, for example, glue, and 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 second sealing member 8 is exemplary, and those skilled in the art can design it adaptively according to actual application requirements. The purpose is to achieve the sealing of the second notch 1241, to 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, and the present disclosure is not limited to this.

[0079] 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 the electrical connection between the battery unit 2 and the power distribution assembly 7. Those skilled in the art can design it adaptively according to the 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 the actual application requirements. Its purpose is to enable, for example, power distribution to meet the power requirements of various load devices.

[0080] in addition, Figure 8 The example shows that the number of the second notches 1241 can be two and they are respectively arranged at the two ends of the front beam 124, so that the wiring length of the second wiring harness of the battery unit 2 and the power distribution assembly 7 can be effectively shortened, and the space utilization rate can be improved. Of course, the number of the second notches 1241 is not limited to Figure 8 Two are shown in the figure, and those skilled in the art can adaptively design the specific number of the second notches 1241 according to the needs, and the present disclosure does not make any specific limitation on this.

[0081] Optionally, in some embodiments not shown in the figure, an insulating layer may be provided on the inner wall surface of the first receiving groove 130. For example, a mica board may be provided on the inner wall of the bottom plate 110 and the frame 120 to form the above insulating layer through the mica board, thereby reducing the risk of arcing or short circuit points in thermal runaway of the battery pack and improving the safety of the entire battery pack. In addition, epoxy powder may be sprayed on the inner wall of the bottom plate 110 and the frame 120, so that the first receiving groove 130 can be further insulated to further improve the safety of the entire battery pack.

[0082] 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 design it adaptively according to actual application requirements. The present disclosure is not limited thereto.

[0083] Optionally, in some embodiments, reference Figures 1 to 8 As shown, the tray assembly may further include a first explosion-proof valve 9, which is disposed at the exhaust port 320. When, for example, the battery pack experiences thermal runaway, due to the high pressure in the first receiving tank 130 that accommodates the battery cell 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.

[0084] 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.

[0085] in addition, Figure 1 It is exemplarily shown that the positions of the first explosion-proof valve 9 and the exhaust port 320 can be arranged on the side of the side beam 121 close to the rear side beam 125, so that the exhaust port 320 can be better away from, for example, the electronic equipment of the vehicle, thereby further improving safety. Of course, the positions of the first explosion-proof valve 9 and the exhaust port 320 are exemplary. In other embodiments, those skilled in the art can adaptively design the position and specific number of the exhaust port 320 according to actual application requirements. The present disclosure is not limited to this.

[0086] According to the second aspect of the present disclosure, a battery pack is also provided, comprising the above-mentioned tray assembly and a battery unit 2. The battery pack can efficiently discharge high-temperature and high-pressure gas when the battery pack is in thermal runaway, and is not prone to gas and / or liquid reflux problems, and the entire battery pack is safer. In addition, the battery pack also has all the beneficial effects of the above-mentioned tray assembly, which will not be described in detail in the present disclosure.

[0087] In some embodiments, reference Figures 1 to 10 As shown, a second explosion-proof valve 220 may be provided on the battery unit 2. Along the height direction of the tray body 1, the second explosion-proof valve 220 is higher than the air inlet 310, which can prevent the second explosion-proof valve 220 from directly facing the air inlet 310, and prevent the gas discharged from the second explosion-proof valve 220 or, for example, the gas accompanied by particles and organic matter in the gas from blocking the air inlet 310 when the battery pack is thermally runaway, thereby affecting the air intake effect of the exhaust channel 3, and preventing the gas from arcing in the exhaust channel 3, thereby further improving the safety of the entire battery pack. In addition, along the height direction of the tray body 1, the second explosion-proof valve 220 is constructed to be higher than the air inlet 310, and the overall structure is more compact. For example, the height of the frame 120 can be reduced, and the size of the battery pack in the height direction (the height direction of the tray body can be referred to) can be reduced, which is conducive to the lightweight design of the battery pack.

[0088] 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, Figure 3 The vertical height distance between the center point of the second explosion-proof valve 220 and the bottom plate 110 is shown.

[0089] 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 figure, the second height b of the air inlet 310 relative to the bottom plate 110 may also be constructed to be greater 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, and those skilled in the art may design it adaptively according to actual application requirements, with the purpose of avoiding the second explosion-proof valve 220 from directly facing the air inlet 310, preventing 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 avoiding arcing of the gas in the exhaust channel 3.

[0090] In addition, the present disclosure does not specifically limit 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.

[0091] Optionally, in some embodiments, reference Figure 1 and Figure 8 As shown, the battery unit 2 may include a plurality of battery cells 210, the length direction of the battery cells 210 is 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 the inner wall of the frame 120 adjacent to the end is provided with an air inlet 310, 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 package.

[0092] Among them, Figure 2 and Figure 3 As shown, both ends of each battery cell 210 of the battery unit 2 along the length direction may be provided with a second explosion-proof valve 220, and as shown in FIG. Figure 8As shown in the gas flow direction (arrow direction), the present disclosure exemplarily describes the pressure relief process of the battery pack, which is as follows:

[0093] 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 of the battery cell 210 adjacent to the side beams 121 on both sides of the frame 120 can directly enter the exhaust channel 3 of the side beams 121 on both sides through the air inlet 310 and achieve pressure relief through the first explosion-proof valve 9 at the exhaust port 320 of the exhaust channel 3, thereby achieving gas discharge to the outside of the tray body; and the gas at the second explosion-proof valve 220 of the battery cell 210 adjacent to the middle beam 127 of the frame 120 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 achieve pressure relief through the first explosion-proof valve 9 at the exhaust port 320 of the exhaust channel 3.

[0094] It should be noted that when the battery pack is in thermal runaway, the internal pressure of the battery pack is relatively high, that is, higher than the atmospheric pressure outside the battery pack. When the explosion-proof valve is in pressure relief operation, the gas inside each battery cell 210, the first containing groove 130 and each chamber can be quickly discharged through the explosion-proof valve to achieve corresponding pressure relief.

[0095] According to the third aspect of the present disclosure, there is also provided an electric device, which includes the above-mentioned battery pack. The electric device can efficiently discharge high-temperature and high-pressure gas when the battery pack is in thermal runaway, and is not prone to gas and / or liquid reflux problems, and the entire battery pack is safer. In addition, the electric device also has all the beneficial effects of the above-mentioned battery pack, which will not be repeated in this disclosure.

[0096] 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 an electric tool for railways, 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.

[0097] 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 in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0098] 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. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0099] In addition, 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 comprises a first receiving groove for receiving the battery cell, an exhaust channel, and an air inlet and an exhaust port communicated with 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 air outlet.

2. The tray assembly according to claim 1, characterized in that: 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 communicated with the exhaust channel.

3. The tray assembly according to claim 2, characterized in that: 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.

4. The tray assembly according to claim 3, characterized in that: The side beam includes a plurality of first cavities, and at least one first cavity is used to form the exhaust channel.

5. The tray assembly according to claim 4, characterized in that: 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 arranged 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.

6. The tray assembly according to claim 4, characterized in that: 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.

7. The tray assembly according to claim 1, characterized in that: The first receiving groove has a plurality of unconnected sub-receiving grooves therein, the sub-receiving grooves being used to accommodate the battery cells, the tray body being provided with a plurality of the exhaust channels, the sub-receiving grooves being connected to at least one exhaust channel via at least one air inlet, and the exhaust channels connected to different sub-receiving grooves being unconnected to each other.

8. The tray assembly according to claim 2, characterized in that: 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 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 cells, and the side beams are provided with exhaust channels connected to 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.

9. The tray assembly according to claim 8, characterized in that: A plurality of air inlets are arranged at intervals along the length direction of the tray body on the inner side wall of the side beam facing the first receiving groove.

10. The tray assembly according to claim 8, characterized in that: The frame further includes a front beam and a rear beam disposed between the two side beams, the two side beams, the front beam and the rear beam together enclose the first receiving groove, the two sub-receiving grooves include a first sub-receiving groove and a second sub-receiving groove, and the two side beams include a first side beam adjacent to the first sub-receiving groove and a second side beam adjacent to the second sub-receiving groove; At least one of the front beam and the rear side beam is provided with a first intermediate transmission channel and a first inlet and a first outlet communicated with the first intermediate transmission channel, the first inlet and the first outlet are both communicated with the first sub-accommodating groove, and the first outlet is closer to the first side beam relative to the first inlet; and / or, At least one of the front beam and the rear side 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.

11. The tray assembly according to claim 8, characterized in that: The frame further includes a front beam and a rear beam disposed between the two side beams, the two side beams, the front beam and the rear beam together enclose the first receiving groove, the two sub-receiving grooves include a first sub-receiving groove and a second sub-receiving groove, and the two side beams include a first side beam adjacent to the first sub-receiving groove and a second side beam adjacent to the second sub-receiving groove; At least one of the front beam and the rear side 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 side 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.

12. The tray assembly according to claim 10 or 11, characterized in that: 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.

13. The tray assembly according to claim 8, characterized in that: The two sub-accommodating grooves are separated by an intermediate beam arranged in the first accommodating groove. The intermediate beam has a first notch and a first blocking member arranged at the first notch. The first blocking member is used for allowing a first wiring harness connecting the two battery cells in the two sub-accommodating grooves to pass through.

14. The tray assembly according to claim 2, characterized in that: The frame is divided into the first accommodating groove and the second accommodating groove by the front beam. The second accommodating groove is used to accommodate the power distribution component. A second notch and a second blocking piece arranged at the second notch are formed on the front beam. The second blocking piece is used for the second wiring harness connecting the battery unit and the power distribution component to pass through.

15. The tray assembly according to claim 1, characterized in that: An insulating layer is disposed on the inner wall surface of the first containing groove.

16. The tray assembly according to claim 1, characterized in that: The tray assembly further includes a first explosion-proof valve, which is disposed at the exhaust port.

17. A battery pack, characterized in that: Comprising the tray assembly and battery unit as described in any one of claims 1-16.

18. The battery pack according to claim 17, characterized in that: The battery unit is provided with a second explosion-proof valve, and along the height direction of the tray body, the second explosion-proof valve is higher or lower than the air inlet.

19. The battery pack according to claim 17 or 18, characterized in that: The battery unit includes a plurality of 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 arranged at the end of the battery cells adjacent to the frame of the tray body, and the air inlet is arranged on the inner side wall of the frame adjacent to the end.

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

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