Battery tray, box body assembly, battery pack and electric device

Abstract

The utility model discloses a battery tray, box subassembly, battery pack and power utilization device, battery tray includes tray body and partition subassembly, tray body includes bottom plate and frame, the frame is arranged around bottom plate and defines the cavity with bottom plate, a plurality of isolated first discharge channel is formed in the frame, and the partition subassembly includes the bottom plate and the bottom plate. The partition assembly is arranged in the tray body and divides the containing cavity into a plurality of battery mounting cavities, a plurality of isolated second discharge channels are formed in the partition assembly, and each battery mounting cavity corresponds to one first discharge channel and one second discharge channel; and each battery mounting cavity is communicated with the corresponding first discharge channel through the corresponding second discharge channel. According to the battery tray disclosed by the embodiment of the utility model, the probability of thermal runaway of all the battery mounting cavities in the whole battery tray can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery tray, a battery pack and an electrical device. Background Art

[0002] In the related technology, the battery case is not designed reasonably. When the battery cell has thermal runaway, it is easy to cause the heat to be unable to be discharged, and spread from the single point of loss of control to the adjacent battery cells until the heat of the whole pack diffuses. More seriously, the extremely high temperature during thermal diffusion may cause a fire, posing a threat to the battery pack, electric vehicles and the lives of passengers. Against the background of people's increasing attention to thermal runaway, thermal diffusion and thermal safety of battery packs, the design of battery case venting, pressure relief and explosion-proof has become imperative. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery tray, which can realize the separate cavity exhaust of multiple battery installation cavities, which is conducive to improving the exhaust safety.

[0004] The utility model also provides a box assembly having the battery tray.

[0005] The utility model also provides a battery pack having the battery tray or box assembly.

[0006] The utility model also provides an electrical device having the battery pack.

[0007] According to the battery tray of the first aspect of the utility model, the battery tray is used for a battery pack and includes: a tray body, the tray body includes a bottom plate and a frame, the frame is arranged around the bottom plate and defines a accommodating cavity with the bottom plate, and a plurality of isolated first discharge channels are formed in the frame; a partition component, the partition component is arranged in the tray body and divides the accommodating cavity into a plurality of battery installation cavities, and a plurality of isolated second discharge channels are formed in the partition component, each of the battery installation cavities corresponds to a first discharge channel and a second discharge channel, so that each of the battery installation cavities is connected to the corresponding first discharge channel through the corresponding second discharge channel.

[0008] According to the battery tray of the embodiment of the utility model, a plurality of isolated first discharge channels are formed in the frame and a plurality of isolated second discharge channels are formed in the partition assembly, and each battery installation cavity corresponds to a first discharge channel and a second discharge channel, respectively, so that each battery installation cavity is connected with the corresponding first discharge channel through the corresponding second discharge channel, so that the discharge paths corresponding to the plurality of battery installation cavities are not connected to each other, so as to realize the cavity-separated and isolated discharge after the battery cells are grouped, so that when thermal runaway occurs to a single or multiple battery cells in a single battery installation cavity, even if thermal runaway occurs, the energy and heat released are very limited, which effectively reduces the probability of thermal runaway occurring in all the battery installation cavities in the entire battery tray.

[0009] In some embodiments, a plurality of communication holes are formed on a side of each second exhaust channel facing the corresponding battery installation cavity, each of the communication holes connects the second exhaust channel and the battery installation cavity, and each of the communication holes is suitable for connecting to a pressure relief valve of a battery cell.

[0010] In some embodiments, the frame includes a plurality of first beams connected end to end, and the first discharge channel is formed in some of the first beams; and / or the partition assembly includes a plurality of second beams, and the second discharge channel is formed in at least some of the second beams.

[0011] In some embodiments, the plurality of first beams include two first side beams arranged opposite to each other along a first direction, a plurality of first discharge channels are formed in the first side beams, and the plurality of second beams include at least one discharge beam extending along the first direction, a plurality of second discharge channels are formed in the discharge beams.

[0012] In some embodiments, the discharge beam is multiple and includes a first discharge beam and a second discharge beam spaced apart along a second direction, the multiple battery installation cavities include a first installation cavity and a second installation cavity spaced apart along the second direction, the first installation cavity is located on the side of the first discharge beam away from the second discharge beam, the second installation cavity is located between the first discharge beam and the second discharge beam, the first discharge beam has a second discharge channel corresponding to the first installation cavity formed therein, the second discharge beam has a second discharge channel corresponding to the second installation cavity formed therein, and the second direction is perpendicular to the first direction; and / or, at least one of the discharge beams corresponds to a plurality of the battery installation cavities spaced apart along the first direction and / or the second direction, the at least one discharge beam has a plurality of the second discharge channels spaced apart along the first direction and / or the second direction formed therein, and the first direction is perpendicular to the second direction.

[0013] In some embodiments, at least one of the discharge beams corresponds to a plurality of the battery installation cavities spaced apart along the first direction and / or the second direction, and the plurality of the second beams further include a partition beam, which is disposed between any adjacent two of the plurality of the battery installation cavities corresponding to the discharge beam.

[0014] In some embodiments, at least one of the first side beams includes: a side beam body, which is arranged at the edge of the bottom plate and connected to the discharge beam; a lifting ear, in which at least one of the first discharge channels is formed, and the lifting ear is arranged on the side of the side beam body away from the accommodating cavity, and an exhaust manifold hole is formed on the side beam body to connect the corresponding first discharge channel and the corresponding second discharge channel.

[0015] In some embodiments, the discharge beam is multiple and includes a first discharge beam and a second discharge beam spaced apart along a second direction, each of the first side beams includes a side beam body and a lifting ear, wherein the first discharge channel in one of the lifting ears is connected to the second discharge channel in the first discharge beam, and the first discharge channel in another lifting ear is connected to the second discharge channel in the second discharge beam, and the second direction is perpendicular to the first direction.

[0016] In some embodiments, two battery installation cavities spaced apart along the first direction correspond to two sides of the width of at least one of the discharge beams, four second discharge channels are formed in the at least one discharge beam, each of the first side beams includes a side beam body and a lifting ear, and two first discharge channels are formed in each of the lifting ears.

[0017] In some embodiments, the battery tray also includes an explosion-proof valve, and the lifting ear is provided with the explosion-proof valve corresponding to the first discharge channel therein; or, the frame also includes two second side beams arranged opposite to each other along the second direction, each second side beam connects two first side beams, and at least one of the second side beams is formed with a third discharge channel connected to the corresponding first discharge channel, and at least one of the second side beams is provided with the explosion-proof valve corresponding to the third discharge channel therein, and the second direction is perpendicular to the first direction.

[0018] In some embodiments, the frame further includes two second side beams arranged opposite to each other along a second direction, each of the second side beams connects two of the first side beams, and the bottom plate, the discharge beam and the two second side beams are an integrated piece.

[0019] In some embodiments, the second discharge channel in the discharge beam is open toward a side of the bottom plate away from the accommodating cavity, and the battery tray further includes a blocking member that is sealingly connected to the open side of the second discharge channel.

[0020] In some embodiments, the partition assembly includes a plurality of spaced-apart discharge beams, wherein a power distribution installation cavity separated from the battery installation cavity is formed between at least one of the discharge beams and the frame.

[0021] In some embodiments, the battery tray includes: a bottom guard plate, which is arranged on the side of the bottom plate away from the accommodating cavity, and an installation gap is formed between the bottom guard plate and the bottom plate; a thermal insulation component, which is arranged in the installation gap, and the installation gap is open toward a second direction; a protective component, which is arranged outside the accommodating cavity and is located on the side of the bottom guard plate in the second direction, and at least a portion of the protective component is opposite to the installation gap in the second direction.

[0022] In some embodiments, the protective member includes: a first plate body, which is connected to the side of the bottom guard plate facing the bottom plate; a second plate body, which is bent and connected to one end of the first plate body close to the frame and fits with the frame to close the installation gap; a third plate body, which is bent and connected to the other side of the first plate body, and the third plate body is fit with the end surface of the bottom guard plate to close the gap between the bottom guard plate and the first plate body.

[0023] In some embodiments, the battery tray further includes: a bottom guard plate, which is disposed on a side of the bottom plate facing away from the accommodating cavity, and the middle and edge of the bottom guard plate are fixed to the bottom plate.

[0024] In some embodiments, a receiving groove recessed toward the bottom plate is formed in the middle of the bottom guard plate, a through hole is formed on the bottom wall of the receiving groove, a fastener is passed through the through hole and fixed to the bottom plate, and the head of the fastener is received in the receiving groove.

[0025] According to the box assembly of the embodiment of the second aspect of the utility model, the box assembly is used for a battery pack and includes a top cover and a battery tray according to the embodiment of the first aspect of the utility model, and the top cover is sealed and connected to the frame and the partition assembly respectively.

[0026] In some embodiments, the side of the partition assembly facing the top cover is fixed to the top cover via an adhesive and a fastener, and the fastener passes through the top cover and is fixed to the partition assembly.

[0027] The battery pack according to the third aspect of the present invention comprises a battery tray according to the first aspect of the present invention or a box assembly according to the second aspect of the present invention, and the battery pack further comprises at least one group of battery groups, each group of the battery groups being arranged in the corresponding battery installation cavity and comprising a plurality of battery cells.

[0028] In some embodiments, the battery cell has a first side wall and a second side wall, the surface area of ​​the first side wall is greater than the surface area of ​​the second side wall, and the pressure relief valve of the battery cell is disposed on the second side wall and directly faces the corresponding second exhaust channel.

[0029] The electrical device according to the fourth aspect of the present invention comprises a battery pack according to the third aspect of the present invention.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 is a schematic diagram of a battery tray according to an embodiment of the utility model;

[0033] Figure 2 yes Figure 1 The enlarged view of the part A shown in the middle circle;

[0034] Figure 3 yes Figure 1 Another schematic diagram of the battery tray shown in;

[0035] Figure 4 yes Figure 3 An enlarged view of the circled section B;

[0036] Figure 5 yes Figure 3 A schematic cross-sectional view of the side beam body shown in FIG.

[0037] Figure 6 yes Figure 3 An exploded view of the battery tray shown in ;

[0038] Figure 7 yes Figure 6 Schematic diagram of the bottom plate, discharge beam and second side beam shown in;

[0039] Figure 8 yes Figure 7Another schematic diagram of the bottom plate, discharge beam and second side beam shown in .

[0040] Reference numerals:

[0041] Battery tray 100,

[0042] Tray body 1, accommodating cavity 1a, battery installation cavity 1b, first installation cavity 1c, second installation cavity 1d, power distribution installation cavity 1e, bottom plate 11, frame 12, first discharge channel 12a, first side beam 121, side beam body 1211, lifting ear 1212, second side beam 122, partition assembly 2, discharge beam 21, second discharge channel 21a, connecting hole 21b, glue groove 21c, first discharge beam 211, second discharge beam 212, explosion-proof valve 3, bottom guard plate 4, protective part 5, first plate body 51, second plate body 52, third plate body 53, sealing plate 6, nut 7, rivet nut 8. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0045] Hereinafter, with reference to the accompanying drawings, a battery tray 100 according to an embodiment of the first aspect of the present invention will be described. The battery tray 100 is used for a battery pack.

[0046] like Figure 1 As shown, the battery tray 100 includes a tray body 1 and a partition assembly 2 .

[0047] The tray body 1 includes a bottom plate 11 and a frame 12. The frame 12 is arranged around the bottom plate 11, and the frame 12 is roughly formed into an annular structure. The frame 12 and the bottom plate 11 define a accommodating cavity 1a. A plurality of isolated first discharge channels 12a are formed in the frame 12, and the plurality of first discharge channels 12a are not connected to each other. The partition component 2 is arranged in the tray body 1, and the partition component 2 divides the accommodating cavity 1a into a plurality of battery installation cavities 1b. The battery installation cavity 1b is used to install a battery pack. The battery pack includes one or more battery cells. The partition component 2 occupies part of the space of the accommodating cavity 1a, and the space corresponding to the plurality of battery installation cavities 1b can be formed as a part of the accommodating cavity 1a. A plurality of isolated second discharge channels 21a are formed in the partition component 2, and the plurality of second discharge channels 21a are not connected to each other.

[0048] Among them, each battery installation cavity 1b corresponds to a first discharge channel 12a and a second discharge channel 21a respectively, so that each battery installation cavity 1b is connected with the corresponding first discharge channel 12a through the corresponding second discharge channel 21a, then multiple battery installation cavities 1b correspond one-to-one with multiple first discharge channels 12a, and multiple battery installation cavities 1b correspond one-to-one with multiple second discharge channels 21a, and each battery installation cavity 1b is connected with a corresponding first discharge channel 12a through a corresponding second discharge channel 21a; when a battery cell has thermal runaway, a certain amount of emissions can be discharged through the pressure relief valve thereon to achieve pressure relief of the battery cell. When one or more battery cells in the battery installation cavity 1b have thermal runaway, high-temperature emissions are discharged from the pressure relief valve of the battery cell into the battery installation cavity 1b, and then the high-temperature emissions enter the second discharge channel 21a and the first discharge channel 12a corresponding to the battery installation cavity 1b in turn, and are finally discharged to the outside of the tray body 1.

[0049] It can be understood that the multiple battery installation cavities 1b are not interconnected, and the emission paths corresponding to the multiple battery installation cavities 1b are also not interconnected, and the multiple battery installation cavities 1b are selectively connected to the outside of the tray body 1 through the emission paths corresponding to themselves. Therefore, when the battery thermal runaway occurs, the high-temperature emissions enter the battery installation cavity 1b and are discharged to the outside of the tray body 1 through the corresponding exhaust path, so that the high-temperature emissions cannot enter the remaining battery installation cavities 1b, or the emission paths corresponding to the remaining battery installation cavities 1b, to affect the battery packs in the remaining battery installation cavities 1b that have not experienced thermal runaway, effectively reducing the probability of thermal runaway occurring in all battery installation cavities 1b in the entire battery tray 100, thereby facilitating improving the thermal safety of the battery pack.

[0050] It can be seen that compared with some technologies, in order to improve space utilization, all battery cells are combined into a large battery pack, and the battery cells in the battery pack are installed on the battery tray in the form of series connection. Once one or some battery cells have thermal runaway and the heat spreads to the adjacent battery cells, it is very easy to trigger a chain reaction, causing heat diffusion in the entire large battery pack. The energy and heat released during thermal runaway are very large. The above-mentioned scheme of the present application, by setting a partition component 2 to divide the accommodating chamber 1a into multiple separated battery installation chambers 1b, splits the original large battery pack into multiple groups of small-sized battery packs, which are respectively installed in different battery installation chambers 1b, and at the same time, the discharge paths corresponding to the multiple battery installation chambers 1b are also isolated and set, so that the discharge paths corresponding to the multiple battery installation chambers 1b are not connected to each other, so as to realize the isolation of the sub-chambers after the battery cells are grouped, and realize the sub-chamber exhaust of the multiple battery installation chambers 1b, so that when a single or multiple battery cells in a single battery installation chamber 1b have thermal runaway, the high-temperature and high-pressure exhaust gas only affects the single battery installation chamber 1b, and the number of battery cells in a single battery installation chamber 1b is relatively small relative to the number of battery cells in the entire battery pack. For example, if there are two battery installation chambers 1b and the number of battery cells in the two battery installation chambers 1b is equal, then the thermal runaway in a single battery installation chamber 1b basically only affects half of the total number of battery cells. Compared with some of the above-mentioned technologies, even if thermal runaway occurs in the scheme of the present application, the energy and heat released are also very limited, which reduces the danger level during thermal runaway.

[0051] According to the battery tray 100 of the embodiment of the utility model, a plurality of isolated first discharge channels 12a are formed in the frame 12, and a plurality of isolated second discharge channels 21a are formed in the partition component 2, and each battery installation cavity 1b corresponds to a first discharge channel 12a and a second discharge channel 21a, respectively, so that each battery installation cavity 1b is connected with the corresponding first discharge channel 12a through the corresponding second discharge channel 21a, so that the discharge paths corresponding to the plurality of battery installation cavities 1b are not connected to each other, so as to realize the cavity-by-cavity isolated discharge after the battery cells are grouped, so that when thermal runaway occurs to a single or multiple battery cells in a single battery installation cavity 1b, even if thermal runaway occurs, the energy and heat released are very limited, which effectively reduces the probability of thermal runaway occurring to all the battery installation cavities 1b in the entire battery tray 100.

[0052] In some embodiments, Figure 1As shown, a plurality of connecting holes 21b are formed on one side of each second discharge channel 21a facing the corresponding battery installation cavity 1b, each connecting hole 21b connects the second discharge channel 21a and the battery installation cavity 1b, and each connecting hole 21b is suitable for connecting to the pressure relief valve of the battery cell. At this time, the battery installation cavity 1b is suitable for installing a plurality of batteries, and the pressure relief valve of each battery cell in the battery installation cavity 1b is suitable for connecting to the second discharge channel 21a respectively, which is beneficial to shortening the discharge path of each battery cell and realizing timely pressure relief. When a part of the plurality of connecting holes 21b is blocked, the remaining connecting holes 21b can still exhaust gas normally, so as to realize the normal and smooth discharge of the discharge in the battery installation cavity 1b.

[0053] Exemplarily, the partition assembly 2 includes a discharge beam 21, a second discharge channel 21a is formed in the discharge beam 21, the battery installation cavity 1b corresponding to the second discharge channel 21a is located on the width side of the discharge beam 21, and a plurality of connecting holes 21b are formed on the width side of the discharge beam 21, each connecting hole 21b is used to connect the pressure relief valve of the corresponding battery cell in the battery installation cavity 1b and the second discharge channel 21a. Of course, in other examples, a plurality of second discharge channels 21a may also be formed in the discharge beam 21, and a plurality of connecting holes 21b are formed on the side of each second discharge channel 21a facing the corresponding battery installation cavity 1b.

[0054] Of course, in other embodiments, a connecting hole 21b may be formed on the side of the second discharge channel 21a facing the corresponding battery installation cavity 1b to connect the second discharge channel 21a and the battery installation cavity 1b; or, at least one of the multiple second discharge channels 21a corresponds to multiple connecting holes 21b, and at least one of the remaining second discharge channels 21a corresponds to one connecting hole 21b.

[0055] In some embodiments, as shown in the figure, the frame 12 includes a plurality of first beams connected end to end, and a first exhaust channel 12a is formed in some of the first beams, that is, the number of first beams formed with the first exhaust channel 12a is less than the total number of first beams; and / or, the partition assembly 2 includes a plurality of second beams, and a second exhaust channel 21a is formed in at least some of the second beams, that is, the number of second beams formed with the second exhaust channel 21a is less than or equal to the total number of second beams. Thus, under the premise of realizing the separation and exhaust of multiple battery installation cavities 1b, it is helpful to simplify the structure.

[0056] Exemplarily, the frame 12 includes four first beams connected end to end, two first beams arranged opposite to each other in the first direction are respectively formed as first side beams 121, each first side beam 121 is formed with at least one first discharge channel 12a, and two first beams arranged opposite to each other in the second direction are respectively formed as second side beams 122, each second side beam 122 is not formed with the first discharge channel 12a. The partition component 2 includes a plurality of second beams arranged at intervals in the second direction, each second beam is respectively formed as a discharge beam 21, and each discharge beam 21 is formed with at least one second discharge channel 21a; or, the partition component 2 includes at least one second beam extending in the first direction and at least one second beam extending in the second direction, each second beam extending in the first direction is respectively formed as a discharge beam 21, and each second beam extending in the second direction is respectively formed as a partition beam, and the discharge beams and the partition beams are arranged crosswise, which can define a cross structure, a T-shaped structure, a well-shaped structure, etc., and at least one second discharge channel 21a is formed in each discharge beam 21, and each partition beam only plays a partitioning role and does not form a second discharge channel 21a.

[0057] In some embodiments, Figure 1 As shown, the plurality of second beams include at least one discharge beam 21 extending along the first direction, and a plurality of second discharge channels 21a are formed in the discharge beam 21, for example, all the second discharge channels 21a are formed in one discharge beam 21, or, all the second discharge channels 21a are formed in a plurality of second discharge beams 21. For example, the partition assembly 2 includes a discharge beam 21, and a plurality of second discharge channels 21a are formed in the discharge beam 21. In this case, the partition assembly 2 may also include a partition beam, and the partition beam may cooperate with the discharge beam 21 to divide the accommodating cavity 1a into a plurality of battery installation cavities 1b; for another example, the partition assembly 2 includes a plurality of discharge beams 21, and a second discharge channel 21a is formed in at least one of the plurality of discharge beams 21. If the second discharge channels 21a are respectively formed in at least two discharge beams 21, the number of the second discharge channels 21a in the at least two discharge beams 21 may be equal or unequal.

[0058] In other words, all the second discharge channels 21a can be formed in the same discharge beam 21, or they can be formed in different discharge beams 21. Therefore, it is convenient to simplify the structure of the second discharge channel 21a and facilitate the forming of the second discharge channel 21a while meeting the requirements of the independent discharge of multiple battery installation cavities 1b. Moreover, the portion of the discharge beam 21 where the second discharge channel 21a is formed can be roughly formed into a hollow structure, which is conducive to achieving sufficient structural strength and bearing capacity of the discharge beam 21.

[0059] like Figure 1As shown, the multiple first beams include two first side beams 121 that are relatively arranged along the first direction, and the multiple first discharge channels 12a are formed in the first side beam 121. At this time, one end of the second discharge channel 21a in the first direction can be connected with the corresponding first discharge channel 12a, which is beneficial to simplify the structure of the first discharge channel 12a and facilitate the forming of the first discharge channel 12a. Moreover, the part of the first side beam 121 formed with the first discharge channel 12a can be roughly formed as a hollow structure, which is beneficial to ensure that the first side beam 121 has sufficient structural strength and bearing capacity.

[0060] For example, all the first discharge channels 12a are formed in the two second side beams 121; or, a plurality of first discharge channels 12a are formed in one of the first side beams 121, and no first discharge channel 12a is formed in the other first side beam 121; for another example, at least one first discharge channel 12a is formed in each of the two first side beams 121, and the number of first discharge channels 12a in the two first side beams 121 can be equal or unequal. In other words, all the first discharge channels 12a can be formed in the same first side beam 121, or in different first side beams 121.

[0061] In some embodiments, Figure 1 As shown, there are multiple discharge beams 21 and the multiple discharge beams 21 include a first discharge beam 211 and a second discharge beam 212 spaced apart along the second direction, and multiple battery installation cavities 1b include a first installation cavity 1c and a second installation cavity 1d spaced apart along the second direction, the first installation cavity 1c is located on the side of the first discharge beam 211 away from the second discharge beam 212, and the second installation cavity 1d is located between the first discharge beam 211 and the second discharge beam 212, a second discharge channel 21a corresponding to the first installation cavity 1c is formed in the first discharge beam 211, and a second discharge channel 21a corresponding to the second installation cavity 1d is formed in the second discharge beam 212, and the second direction is perpendicular to the first direction; and / or, at least one discharge beam 21 corresponds to multiple battery installation cavities 1b spaced apart along the first direction and / or the second direction, and at least one discharge beam 21 has multiple second discharge channels 21a spaced apart along the first direction and / or the second direction, and the first direction is perpendicular to the second direction.

[0062] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0063] In some embodiments, at least one discharge beam 21 corresponds to a plurality of battery installation cavities 1b spaced apart along the first direction and / or the second direction, and the plurality of second beams further include at least one partition beam, which is disposed between any two adjacent battery installation cavities 1b corresponding to the discharge beam 21. In this case, the partition beam may only play a partitioning role instead of forming a second discharge channel 21a. Of course, each of the plurality of second beams may also be formed as a discharge beam 21, in which case the partition assembly 2 may not include a partition beam.

[0064] In some embodiments, Figure 1 As shown, at least one first side beam 121 includes a side beam body 1211 and a lifting ear 1212, the side beam body 1211 is arranged at the edge of the bottom plate 11, and the side beam body 1211 is connected to the discharge beam 21, then one length end of the discharge beam 21 is connected to the side beam body 1211, at least one first discharge channel 12a is formed in the lifting ear 1212, and the lifting ear 1212 is arranged on the side of the side beam body 1211 away from the accommodating chamber 1a, and an exhaust manifold hole connecting the corresponding first discharge channel 12a and the corresponding second discharge channel 21a is formed on the side beam body 1211, then the emission in the second discharge channel 21a can flow to the corresponding first discharge channel 12a through the exhaust manifold hole.

[0065] For example, each first side beam 121 includes a side beam body 1211 and a lifting lug 1212 , each lifting lug 1212 is formed with at least one first discharge channel 12 a , and the number of first discharge channels 12 a in the two lifting lugs 1212 may be equal or different.

[0066] It can be seen that the lifting lug 1212 can not only realize the smooth discharge of the discharge in the corresponding battery installation cavity 1b, but also has a certain bearing capacity, so as to realize the lifting of the battery tray 100, etc., which is convenient for realizing multiple uses of one object and is conducive to simplifying the structure of the battery tray 100. In addition, the exhaust manifold on the side beam body 1211 connects the first discharge channel 12a and the corresponding second discharge channel 21a, and the side beam body 1211 is connected to the discharge beam 21, so that the discharge beam 21 is convenient for covering the exhaust manifold so that the exhaust manifold is located within the cross-sectional contour range of the second discharge channel 21a, that is, the exhaust manifold is hidden in the discharge beam 21, and the exhaust manifold is not easily blocked, which is convenient for improving the smoothness of exhaust.

[0067] Exemplarily, a plurality of connecting holes 21b are formed on one side of each second discharge channel 21a facing the corresponding battery installation cavity 1b, and each connecting hole 21b connects the second discharge channel 21a and the battery installation cavity 1b. The exhaust manifold is hidden in the discharge beam 21. When some of the connecting holes 21b on the discharge beam 21 are blocked, the remaining connecting holes 21b can still be exhausted normally, and the exhaust is converged into the ear 1212 through the exhaust manifold hidden on the inner side beam body 1211 of the discharge beam 21, and finally discharged to the outside of the tray body 1.

[0068] Exemplarily, the side beam body 1211 includes a first split portion, a second split portion and a third split portion, the first split portion extends in the third direction, the second split portion and the third split portion are respectively arranged at two ends of the first split portion in the third direction, the second split portion extends in the first direction in a direction away from the accommodating cavity 1a, the third split portion extends in the first direction toward the accommodating cavity 1a, the third split portion is suitable for connecting with the bottom plate 11, the second split portion is suitable for connecting with the top cover of the battery pack, and the top cover is suitable for connecting with the frame 12 to close the accommodating cavity 1a; the ear 1212 is arranged on the side of the first split portion away from the accommodating cavity 1a, the ear 1212 is formed with a first discharge channel 12a open to the accommodating cavity 1a, the first split portion is connected to the ear 1212 and closes the open mouth of the first discharge channel 12a. For example, at this time, the battery cell installation cavity is configured as two, and the first split portion is provided with an exhaust manifold hole penetrating in the first direction, and the exhaust manifold hole connects the first discharge channel 12a with the corresponding battery installation cavity 1b through the corresponding second discharge channel 21a. The third direction is perpendicular to the first direction and the second direction. For example, the first direction and the second direction may be the length direction and the width direction of the battery tray 100, respectively, and the third direction is the height direction of the battery tray 100.

[0069] It can be seen that the arrangement of the first split part, the second split part and the third split part can make the side beam body 1211 roughly configured as a Z-shape. Compared with configuring the side beam body 1211 as a square shape, the above arrangement of the present application is conducive to reducing the amount of material used for the side beam body 1211, facilitating the reduction of the weight of the battery tray 100, and reducing the production cost of the battery tray 100. Exemplarily, the side beam body 1211 is a roll-pressed integral beam.

[0070] In some embodiments, Figure 1As shown, the discharge beams 21 are multiple and the multiple discharge beams 21 include a first discharge beam 211 and a second discharge beam 212 spaced apart along the second direction, so that the first discharge beam 211 and the second discharge beam 212 divide the accommodating cavity 1a into a first installation cavity 1c and a second installation cavity 1d spaced apart along the second direction, the first installation cavity 1c is located on the side of the first discharge beam 211 away from the second discharge beam 212, the second installation cavity 1d is located between the first discharge beam 211 and the second discharge beam 212, and a cavity 1c is formed in the first discharge beam 211 to be spaced apart from the second discharge beam 212. A second discharge channel 21a corresponds to a mounting cavity 1c, and a second discharge channel 21a corresponding to the second mounting cavity 1d is formed in the second discharge beam 212; each first side beam 121 includes a side beam body 1211 and a lifting ear 1212, wherein the first discharge channel 12a in one lifting ear 1212 is connected to the second discharge channel 21a in the first discharge beam 211, and the first discharge channel 12a in the other lifting ear 1212 is connected to the second discharge channel 21a in the second discharge beam 212, and the second direction is perpendicular to the first direction.

[0071] It can be seen that the emissions in the first installation cavity 1c can flow to the first emission channel 12a in one of the above-mentioned ears 1212 through the second emission channel 21a in the first emission beam 211, and the emissions in the second installation cavity 1d can flow to the first emission channel 12a in the other above-mentioned ears 1212 through the second emission channel 21a in the second emission beam 212, so as to realize the isolated discharge of the emissions in the first installation cavity 1c and the second installation cavity 1d.

[0072] In some embodiments, two sides of the width of at least one discharge beam 21 (the second direction can be understood as the width direction of the discharge beam 21) correspond to two battery installation cavities 1b spaced apart along the first direction, and four second discharge channels 21a are formed in at least one discharge beam 21. The two second discharge channels 21a spaced apart along the first direction constitute a channel group. There are two channel groups, and the two channel groups are spaced apart along the second direction; each first side beam 121 includes a side beam body 1211 and a lifting ear 1212, and two first discharge channels 12a are formed in each lifting ear 1212. The two first discharge channels 12a in each lifting ear 1212 can be spaced apart along the second direction, and the two first side beams 121 can provide four first discharge channels 12a to be connected one by one with the four second discharge channels 21a, so as to realize the isolated discharge of the four battery installation cavities 1b, and the discharge paths of the four battery installation cavities 1b are more reasonable, and the impact between the discharge paths is small.

[0073] Of course, the two sides of the width of the at least one discharge beam 21 may correspond to three or more battery installation cavities 1b respectively, and the number of battery installation cavities 1b corresponding to the two sides of the width of the at least one discharge beam 21 may be equal or unequal.

[0074] In other embodiments, two sides of the width of at least one discharge beam 21 correspond to a battery installation cavity 1b respectively, and in this case, two second discharge channels 21a spaced apart along the second direction may be formed in the at least one discharge beam 21; or, one side of the width of at least one discharge beam 21 corresponds to a plurality of battery installation cavities 1b spaced apart along the first direction, and in this case, a plurality of second discharge channels 21a spaced apart along the first direction may be formed in the at least one discharge beam 21.

[0075] In some embodiments, Figure 1 and Figure 3 As shown, the battery tray 100 also includes an explosion-proof valve 3, and the lifting ear 1212 is provided with an explosion-proof valve 3 corresponding to the first discharge channel 12a therein, that is, each first discharge channel 12a can correspond to an explosion-proof valve 3, and the explosion-proof valve 3 can selectively connect the corresponding first discharge channel 12a with the outside of the tray body 1. The explosion-proof valve 3 is configured to open when the internal pressure of the first discharge channel 12 exceeds a preset value to connect the corresponding first discharge channel 12a with the outside of the tray body 1. In some other embodiments, the battery tray 100 includes an explosion-proof valve 3, and the frame 12 also includes two second side beams 122 arranged opposite to each other along the second direction, each second side beam 122 connects two first side beams 121, and at least one second side beam 122 is formed with a third discharge channel connected to the corresponding first discharge channel 12a, then each first discharge channel 12a can correspond to a third discharge channel, and the at least one second side beam 122 is provided with an explosion-proof valve 3 connected to the third discharge channel therein, and the explosion-proof valve 3 can selectively connect the corresponding third discharge channel to the outside of the tray body 1, and the explosion-proof valve 3 is configured to open when the internal pressure of the third discharge channel exceeds a preset value to connect the corresponding third discharge channel to the outside of the tray body 1, and the second direction is perpendicular to the first direction.

[0076] It can be seen that no matter whether the explosion-proof valve 3 is set corresponding to the first discharge channel 12a or the third discharge channel, timely pressure relief can be achieved when the battery cell is thermally runaway. At the same time, the setting position of the explosion-proof valve 3 has a certain flexibility, which is convenient for application in different scenarios and improves applicability.

[0077] Exemplarily, two battery installation cavities 1b spaced apart along the first direction correspond to two sides of the width of at least one discharge beam 21, four second discharge channels 21a are formed in at least one discharge beam 21, each first side beam 121 includes a side beam body 1211 and a lifting ear 1212, two first discharge channels 12a are formed in each lifting ear 1212, two third discharge channels spaced apart along the first direction are formed in each second side beam 122, and each third discharge channel corresponds to an explosion-proof valve 3.

[0078] In some embodiments, Figure 6-Figure 8 As shown, the frame 12 also includes two second side beams 122 arranged opposite to each other along the second direction, each second side beam 122 connects the two first side beams 121, and the bottom plate 11, the partition component 2 and the two second side beams 122 are an integral part (such as an integral rolled part). For example, the partition component 2 includes a plurality of discharge beams 21 spaced apart along the second direction, and the bottom plate 11, all the discharge beams 21 and the two second side beams 122 are an integral part. In this way, the assembly process of the partition component 2 and the bottom plate 11, and the assembly process of the second side beam 122 and the bottom plate 11 can be saved, which is beneficial to improving the processing efficiency of the battery tray 100, facilitating the reduction of production costs, and also facilitating the sealing between the partition component 2 and the bottom plate 11, and the sealing between the bottom plate 11 and the second side beam 122.

[0079] In some existing technologies, the bottom plate, partition assembly, and second side beam are all constructed as a single body and need to have corresponding molds respectively. There are many types of molds, and the partition assembly and the second side beam need to be welded to the bottom plate after production to ensure the strength and airtightness of the battery tray, resulting in low production efficiency and high production cost of the battery tray. In some embodiments, the bottom plate 11, the partition assembly 2, and the two second side beams 122 are rolled together, and one rolling mold can produce the bottom plate 11, the discharge beam 21, and the two second side beams 122, which reduces the use of molds and thus reduces mold cost expenditures. The bottom plate 11, the partition assembly 2, and the two second side beams 122 are rolled together to improve the strength and airtightness of the battery tray 100, and at the same time, it can avoid the errors caused by manually welding the partition assembly 2 and the second side beam 122 to the bottom plate 11, thereby improving the production consistency of the battery tray 100.

[0080] Of course, in other embodiments, the discharge beam 21 is an extruded integral part, the discharge beam 21 is welded to the bottom plate 11, and the second side beam 122 is welded to the floor.

[0081] In some embodiments, Figure 3 and Figure 6 As shown, the second discharge channel 21a in the discharge beam 21 is open on the side of the bottom plate 11 away from the accommodating cavity 1a, for example, the bottom of the second discharge channel 21a is open; the battery tray 100 also includes a sealing member 6, which is sealingly connected to the open side of the second discharge channel 21a to achieve sealing of the second discharge channel 21a and is conducive to strengthening the structure.

[0082] In some embodiments, Figure 3 and Figure 6As shown, the partition assembly 2 includes a plurality of discharge beams 21 spaced apart along the second direction, each discharge beam 21 extends along the first direction, the bottom plate 11, the plurality of discharge beams 21 and the two second side beams 122 are integrally roll-formed parts, and the second discharge channel 21a in the discharge beam 21 is open toward the side of the bottom plate 11 away from the accommodating cavity 1a, and the battery tray 100 also includes a sealing plate 6, which is arranged on the side of the bottom plate 11 away from the accommodating cavity 1a and is sealed and connected to the bottom plate 11 and the two first side beams 121 respectively to close the open side of the second discharge channel 21a, thereby sealing the second discharge channel 21a, and at the same time, the bottom plate 11 can be reinforced to facilitate improving the structural strength and reliability of the battery tray 100.

[0083] In some embodiments, Figure 1 As shown, the partition assembly 2 includes a plurality of discharge beams 21 arranged at intervals, wherein a power distribution installation cavity 1e separated from the battery installation cavity 1b is formed between one or more of the discharge beams 21 and the frame 12. The power distribution installation cavity 1e is suitable for installing the power distribution assembly, and the power distribution installation cavity 1e and the plurality of battery installation cavities 1b are isolated from each other to isolate the battery cells from the power distribution assembly. It can be understood that the high-temperature emissions generated when the battery cells are in thermal runaway will carry electrolytes, and the power distribution installation cavity 1e and the plurality of battery installation cavities 1b are isolated from each other to prevent the high-temperature emissions from entering the power distribution installation cavity 1e and contacting the power distribution assembly, thereby reducing the risk of arcing of the power distribution assembly and improving the reliability of the battery pack.

[0084] In the related art, the distribution assembly and the battery cell are installed in the same cavity. Once the battery cell has thermal runaway, high temperature, high pressure and even gas mixed with electrolyte will directly fill the entire cavity, which can easily cause high-voltage arcing. The arc burns through the adjacent battery cells, causing multiple battery cells to lose control until the entire pack loses control, spreads, or even catches fire. The present application isolates the distribution assembly (for example, including the distribution box BDU (Battery Disconnect Unit, a type of distribution box), high-voltage plug-in, BMS (battery management system) main control hardware and other high and low voltage components) from the battery cell cavity, that is, isolates the high-voltage distribution assembly from the battery cell in different chambers, which can greatly reduce the risk of high-voltage arcing at the distribution assembly due to thermal runaway of a single battery cell.

[0085] Exemplarily, the partition assembly 2 includes a plurality of discharge beams 21 spaced apart along the second direction, each discharge beam 21 extending along the first direction, wherein a power distribution installation cavity 1e is formed between one of the discharge beams 21 and the frame 12, and the power distribution installation cavity 1e is located on the same side of the plurality of battery installation cavities 1b in the second direction, and the first direction is perpendicular to the second direction.

[0086] In some embodiments, Figure 1As shown, the battery tray 100 includes a bottom guard plate 4 and a heat preservation member. The bottom guard plate 4 is arranged on the side of the bottom plate 11 away from the accommodating cavity 1a, so the bottom guard plate 4 can play a certain protective role on the bottom plate 11. An installation gap is formed between the bottom guard plate 4 and the bottom plate 11, and the heat preservation member is arranged in the installation gap. It can be understood that the bottom guard plate 4 is arranged on the bottom plate 11 to improve the structural strength of the battery tray 100. At the same time, the bottom guard plate 4 is arranged on the side of the bottom plate 11 away from the accommodating cavity 1a to prevent the bottom plate 11 from contacting with other objects and being damaged. The heat preservation member is arranged between the bottom guard plate 4 and the bottom plate 11 and covers the bottom of the bottom plate 11, which is conducive to improving the heat preservation performance of the battery tray 100.

[0087] Furthermore, the installation gap is open toward the second direction, and the battery tray 100 also includes a protective member 5, which is arranged outside the accommodating cavity 1a, and the protective member 5 is located on one side of the bottom guard plate 4 in the second direction. At least a portion of the protective member 5 is opposite to the installation gap in the second direction, and the above-mentioned at least portion of the protective member 5 can block the installation gap.

[0088] When the battery tray 100 is used in a vehicle, the second direction is parallel to the direction of travel of the vehicle, the heat preservation member is constructed of heat preservation foam, and the battery pack is arranged on the side of the vehicle chassis away from the vehicle body. When the vehicle is driving on a road with accumulated water, the tire will splash the accumulated water, and the splashed accumulated water may enter the installation gap through the open mouth of the installation gap and wet the heat preservation foam, thereby weakening the heat preservation effect of the heat preservation foam on the battery pack. At the same time, the accumulated water in the installation gap will not be discharged quickly, which accelerates the corrosion rate of the bottom plate 11 and the bottom guard plate 4 and reduces the service life of the battery pack. At least part of the protective member 5 is directly opposite to the installation gap in the direction of travel of the vehicle, which can prevent the splashed accumulated water from entering the installation gap, thereby reducing the risk of accumulated water wetting the heat preservation foam, which is convenient for improving the heat preservation effect of the battery pack and extending the service life of the battery pack. That is, when the vehicle is driving forward, the protective member 5 is shielded at the front side of the installation gap.

[0089] Optionally, the protective member 5 is a sheet metal member.

[0090] In some embodiments, Figure 2 and Figure 4 As shown, the protective member 5 includes a first plate body 51, a second plate body 52 and a third body. The first plate body 51 is connected to the side of the bottom guard plate 4 facing the bottom plate 11, the second plate body 52 is bent and connected to the end of the first plate body 51 close to the frame 12 and fits with the frame 12 to close the installation gap, and the third plate body 53 is bent and connected to the other side of the first plate body 51. The third plate body 53 is fit with the end face of the bottom guard plate 4 to close the gap between the bottom guard plate 4 and the first plate body 51.

[0091] Exemplarily, the first plate body 51 extends in the first direction and is suitable for being connected to the bottom guard plate 4, the second plate body 52 and the third plate body 53 are respectively arranged at the two ends of the first plate body 51 in the second direction, the second plate body 52 extends in the third direction in the direction away from the bottom plate 11 and is fitted with the second side beam 122, so that the second plate body 52 can close the installation gap between the bottom plate 11 and the bottom guard plate 4, the third plate body 53 extends in the third direction toward the bottom guard plate 4 and is fitted with the end face of the bottom guard plate 4 in the first direction, so that the third plate body 53 can close the gap between the bottom guard plate 4 and the first plate body 51, thereby, the first plate body 51, the second plate body 52 and the third plate body 53 cooperate to close the installation gap between the bottom plate 11 and the bottom guard plate 4 to prevent splashed water from entering the installation gap and wetting the insulation component.

[0092] In some embodiments, Figure 3 As shown, the battery tray 100 also includes a bottom guard plate 4, which is arranged on the side of the bottom plate 11 away from the accommodating cavity 1a. The middle part and the edge of the bottom guard plate 4 are fixed to the bottom plate 11 to achieve the installation of the bottom guard plate 4, and at the same time, the problem of the middle part of the bottom guard plate 4 bulging outward after installation can be solved. In the related art, the middle part of the bottom guard plate 4 is prone to bulge outward after installation, making the ground clearance of the whole vehicle smaller and increasing the probability of the battery pack falling to the bottom. The above-mentioned solution of the present application fixes the middle part of the bottom guard plate 4 to the bottom plate 11, which not only achieves the installation of the bottom guard plate 4, but also improves the problem of the middle part of the bottom guard plate 4 bulging outward, reducing the risk of the battery pack being bumped.

[0093] Exemplarily, two spaced nuts 7 are welded on the side of the base plate 11 facing the bottom guard plate 4, the nuts 7 are located in the middle area of ​​the base plate 11 in the second direction, and the fasteners are passed through the bottom guard plate 4 and threadedly fixed with the nuts 7; of course, the number of nuts 7 is not limited to this, and may also be one, three or more.

[0094] In some embodiments, a receiving groove recessed toward the bottom plate 11 is formed in the middle portion of the bottom guard plate 4, and a through hole is formed on the bottom wall of the receiving groove. A fastener is passed through the through hole and the fastener is fixed to the bottom plate 11. The head of the fastener is received in the receiving groove so that the fastener does not extend out of the receiving groove. The end of the fastener facing away from the bottom plate 11 does not extend beyond the bottom guard plate 4 in the direction from the bottom plate 11 toward the bottom guard plate 4 (from top to bottom), so that the fastener is not easily loosened by being bumped, etc., thereby facilitating improving the reliability of fastener installation.

[0095] According to the box assembly of the second embodiment of the utility model, the box assembly is used for a battery pack and includes a top cover and a battery tray 100 according to the first embodiment of the utility model, and the top cover is sealed and connected to the frame 12 and the partition assembly 2 respectively.

[0096] According to the box assembly of the embodiment of the utility model, by adopting the above-mentioned battery tray 100, the probability of thermal runaway occurring in all battery installation cavities in the entire battery tray can be reduced.

[0097] In some embodiments, the side of the partition assembly 2 facing the top cover is fixed to the top cover by means of adhesive and fasteners, the fasteners are passed through the top cover, and the fasteners are fixed to the partition assembly 2. Thus, the adhesive facilitates the sealing connection between the partition assembly 2 and the top cover, while the fasteners can improve the connection strength between the partition assembly 2 and the top cover, realize a reliable mechanical connection between the partition assembly 2 and the top cover, and help improve the reliability of the box assembly.

[0098] In the related art, when the battery pack thermally runs away and the temperature and pressure inside the pack rise sharply, the top cover of the battery pack bulges under the high internal pressure. Combined with the high temperature, the bonding strength of the adhesive joints is eventually reduced or even fails completely, resulting in the high temperature and high pressure gas in the battery installation cavity that has thermal runaway being easily leaked into the cavity, affecting the battery cells in the adjacent battery installation cavity or the distribution components in the distribution installation cavity described above. The above scheme of the present application can improve the insulation effect between adjacent battery installation cavities 1b or the insulation effect between adjacent battery installation cavities 1b and distribution installation cavity 1e by adding fasteners to connect the partition assembly 2 and the top cover, which can solve the problems of the top cover of the battery pack bulging and the high temperature gas leaking into the cavity during thermal runaway, and is beneficial to improving the thermal safety level of the battery pack.

[0099] For example, Figure 7 and Figure 8 As shown, the partition assembly 2 includes a plurality of discharge beams 21 arranged at intervals, and the side of each discharge beam 21 facing the top cover is fixed to the top cover by adhesive and fasteners; a glue groove 21c is formed on the top side of each discharge beam 21, and the glue groove 21c is suitable for accommodating the adhesive, and the top of each discharge beam 21 is provided with a plurality of blind hole rivet nuts 8 arranged at intervals along the length direction (i.e., the first direction) of the discharge beam 21, and the fasteners are bolts, which are threadedly fixed to the rivet nuts 8 to achieve mechanical connection between the discharge beam 21 and the top cover.

[0100] The battery pack according to the third aspect of the present invention comprises a battery tray 100 according to the first aspect of the present invention or a box assembly according to the second aspect of the present invention, and the battery pack further comprises one or more battery packs, each battery pack being arranged in a corresponding battery mounting cavity 1b and comprising a plurality of battery cells.

[0101] According to the battery pack of the embodiment of the present invention, by adopting the above-mentioned battery tray 100 or box assembly, the probability of thermal runaway occurring in all battery installation cavities in the entire battery tray can be reduced.

[0102] In some embodiments, the battery cell has a first side wall and a second side wall, the surface area of ​​the first side wall is greater than the surface area of ​​the second side wall, the pressure relief valve of the battery cell is arranged on the second side wall, and the pressure relief valve is directly opposite to the corresponding second discharge channel 21a. As a result, the extrusion force between the battery cell and the second discharge channel 21a is relatively small, and it is not easy to block the connecting hole 21b between the second discharge channel 21a and the battery cell installation cavity due to the expansion and deformation of the battery cell, which is conducive to improving the discharge smoothness.

[0103] Exemplarily, the length of the battery cell in the second direction is greater than its height in the third direction, and the height of the battery cell in the third direction is greater than its width in the second direction (for example, the battery cell is a blade battery), the first side wall can be the large surface of the battery cell, the battery cell has two first side walls arranged opposite to each other along the first direction and two second side walls arranged opposite to each other along the second direction, and the pressure relief valve can be arranged at one end of the length of the battery cell; when heat diffusion occurs, the battery cell expands, causing the plastic parts at the edge to be squeezed and easily deformed. Under the action of high temperature, the softened plastic parts are very likely to block the connecting hole 21b between the battery installation cavity 1b and the second discharge channel 21a, resulting in failure to release pressure and exhaust normally. The above-mentioned arrangement of the present application makes the expansion and deformation of the battery cell during thermal runaway mainly manifested in the first direction, and the expansion and deformation of the battery cell in the second direction is relatively small, and the probability of the battery cell blocking the connecting hole 21b between the pressure relief valve and the second discharge channel 21a due to expansion and deformation is relatively small.

[0104] The electrical device according to the fourth aspect of the present invention comprises a battery pack according to the third aspect of the present invention.

[0105] According to the electric device of the embodiment of the utility model, by adopting the above-mentioned battery pack, the probability of thermal runaway occurring in all battery installation cavities in the entire battery tray can be reduced, thereby reducing the heat propagation rate.

[0106] The battery packs described in the embodiments of the present application are suitable for various devices that use battery packs, such as power-consuming devices such as portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft.

[0107] Other structures and operations of the electrical device according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0108] In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0109] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery tray, characterized in that: The battery tray is used for a battery pack and comprises: A tray body, the tray body comprising a bottom plate and a frame, the frame is arranged around the bottom plate and defines a receiving cavity with the bottom plate, and a plurality of isolated first discharge channels are formed in the frame; A partition component is arranged in the tray body and divides the accommodating cavity into a plurality of battery installation cavities, and a plurality of isolated second discharge channels are formed in the partition component, each of the battery installation cavities corresponds to a first discharge channel and a second discharge channel, so that each of the battery installation cavities is connected to the corresponding first discharge channel through the corresponding second discharge channel.

2. The battery tray according to claim 1, characterized in that: A plurality of communication holes are formed on a side of each of the second exhaust passages facing the corresponding battery installation cavity, each of the communication holes communicates with the second exhaust passage and the battery installation cavity, and each of the communication holes is suitable for communicating with a pressure relief valve of a battery cell.

3. The battery tray according to claim 1, characterized in that: The frame includes a plurality of first beams connected end to end in sequence, and the first discharge channel is formed in some of the first beams; and / or, The partition assembly includes a plurality of second beams, and the second discharge channel is formed in at least some of the second beams.

4. The battery tray according to claim 3, characterized in that: The plurality of first beams include two first side beams arranged opposite to each other along a first direction, and the plurality of first discharge channels are formed in the first side beams. The plurality of second beams include at least one discharge beam extending along the first direction, and the plurality of second discharge channels are formed in the discharge beams.

5. The battery tray according to claim 4, characterized in that: The plurality of discharge beams include a first discharge beam and a second discharge beam spaced apart along a second direction, the plurality of battery installation cavities include a first installation cavity and a second installation cavity spaced apart along the second direction, the first installation cavity is located on a side of the first discharge beam away from the second discharge beam, the second installation cavity is located between the first discharge beam and the second discharge beam, the first discharge beam has a second discharge channel corresponding to the first installation cavity formed therein, the second discharge beam has a second discharge channel corresponding to the second installation cavity formed therein, and the second direction is perpendicular to the first direction; and / or, At least one of the discharge beams corresponds to a plurality of the battery installation cavities spaced apart along the first direction and / or the second direction, and a plurality of the second discharge channels spaced apart along the first direction and / or the second direction are formed in the at least one of the discharge beams, and the first direction is perpendicular to the second direction.

6. The battery tray according to claim 5, characterized in that: At least one of the discharge beams corresponds to a plurality of the battery installation cavities spaced apart along the first direction and / or the second direction, and the plurality of the second beams further include a partition beam, which is disposed between any adjacent two of the plurality of the battery installation cavities corresponding to the discharge beam.

7. The battery tray according to claim 4, characterized in that: At least one of the first side beams comprises: A side beam body, the side beam body being arranged at the edge of the bottom plate and connected to the discharge beam; A lifting ear is formed with at least one of the first emission channels, and the lifting ear is arranged on a side of the side beam body away from the accommodating cavity, and an exhaust manifold hole is formed on the side beam body to connect the corresponding first emission channel and the corresponding second emission channel.

8. The battery tray according to claim 7, characterized in that: There are multiple discharge beams including a first discharge beam and a second discharge beam spaced apart along a second direction, each of the first side beams including a side beam body and a lifting lug, wherein the first discharge channel in one of the lifting lugs is connected to the second discharge channel in the first discharge beam, and the first discharge channel in another lifting lug is connected to the second discharge channel in the second discharge beam, and the second direction is perpendicular to the first direction.

9. The battery tray according to claim 7, characterized in that: Two battery installation cavities spaced apart along the first direction correspond to the two sides of the width of at least one of the discharge beams, and four second discharge channels are formed in the at least one discharge beam. Each of the first side beams includes a side beam body and a lifting ear, and two first discharge channels are formed in each of the lifting ears.

10. The battery tray according to claim 7, characterized in that: Also includes explosion-proof valves, The lifting lug is provided with the explosion-proof valve corresponding to the first discharge channel therein; or, The frame also includes two second side beams arranged opposite to each other along a second direction, each of the second side beams connects two of the first side beams, at least one of the second side beams is formed with a third discharge channel connected to the corresponding first discharge channel, and at least one of the second side beams is provided with an explosion-proof valve corresponding to the third discharge channel therein, and the second direction is perpendicular to the first direction.

11. The battery tray according to claim 4, characterized in that: The frame also includes two second side beams arranged opposite to each other along a second direction, each of the second side beams connects two of the first side beams, and the bottom plate, the discharge beam and the two second side beams are an integrated piece.

12. The battery tray according to claim 11, characterized in that: The second discharge channel in the discharge beam is open toward a side of the bottom plate away from the accommodating cavity, The battery tray further includes a blocking member, which is sealingly connected to an open side of the second exhaust passage.

13. The battery tray according to claim 1, characterized in that: The partition assembly includes a plurality of discharge beams disposed at intervals, wherein a power distribution installation cavity separated from the battery installation cavity is formed between at least one of the discharge beams and the frame.

14. The battery tray according to claim 1, characterized in that: include: A bottom guard plate, the bottom guard plate is arranged on a side of the bottom plate away from the accommodating cavity, and an installation gap is formed between the bottom guard plate and the bottom plate; a heat-insulating member, the heat-insulating member being arranged in the installation gap, the installation gap being open toward the second direction; A protective member is arranged outside the accommodating cavity and located on one side of the bottom guard plate in the second direction, and at least a portion of the protective member is opposite to the installation gap in the second direction.

15. The battery tray according to claim 14, characterized in that: The protective element comprises: A first plate body, the first plate body being connected to a side of the bottom guard plate facing the bottom plate; A second plate body, the second plate body is bent and connected to one end of the first plate body close to the frame and is fitted with the frame to close the installation gap; A third plate body, wherein the third plate body is bent and connected to the other side of the first plate body, and the third plate body is fitted with the end surface of the bottom guard plate to close the gap between the bottom guard plate and the first plate body.

16. The battery tray according to any one of claims 1 to 15, characterized in that: Also includes: A bottom guard plate is arranged on a side of the bottom plate away from the accommodating cavity, and the middle part and the edge of the bottom guard plate are fixed to the bottom plate.

17. The battery tray according to claim 16, characterized in that: A receiving groove recessed toward the bottom plate is formed in the middle of the bottom guard plate, a through hole is formed on the bottom wall of the receiving groove, a fastener is passed through the through hole and fixed to the bottom plate, and the head of the fastener is received in the receiving groove.

18. A box assembly, characterized in that: The box assembly is used for a battery pack and includes a top cover and a battery tray according to any one of claims 1 to 17, wherein the top cover is sealed and connected to the frame and the partition assembly respectively.

19. The box assembly according to claim 18, characterized in that: The side of the partition assembly facing the top cover is fixed to the top cover via an adhesive member and a fastener, and the fastener is penetrated through the top cover and fixed to the partition assembly.

20. A battery pack, characterized in that: The battery pack comprises a battery tray according to any one of claims 1 to 14 or a box assembly according to claim 18 or 19, wherein the battery pack further comprises at least one group of battery groups, each group of the battery groups being arranged in the corresponding battery installation cavity and comprising a plurality of battery cells.

21. The battery pack according to claim 20, characterized in that: The battery cell has a first side wall and a second side wall, the surface area of ​​the first side wall is greater than the surface area of ​​the second side wall, and the pressure relief valve of the battery cell is arranged on the second side wall and directly faces the corresponding second exhaust channel.

22. An electrical device, characterized in that: Comprising a battery pack according to claim 20 or 21.

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