Tray, tray assembly and battery pack

Abstract

A tray (1), comprising an insulating support plate (11) and a support structure (12); the insulating support plate (11) is arranged on a lower box body (300), and the insulating support plate (11) is provided with a plurality of mounting holes (111), the plurality of mounting holes (111) corresponding to a plurality of battery cells (2011) of a battery module (200); the support structure (12) is provided on the surface of the side of the insulating support plate (11) facing away from the lower box body (300), the support structure (12) comprising a plurality of support bases (121) corresponding to the plurality of mounting holes (111), each support base (121) being detachably mounted at a corresponding mounting hole (111), and the plurality of support bases (121) respectively corresponding to the plurality of battery cells (2011) of the battery module (200).

Description

Pallets, pallet assemblies and battery packs

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on September 12, 2023, with application numbers 202322483720.5 and 202322485765.6. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a tray, a tray assembly, and a battery pack. Background Art

[0003] In the related art, there are two ways to install large cylindrical battery packs. One is to assemble large cylindrical batteries in series and parallel with liquid cooling tubes, and stack them together on a plastic pallet assembly. The plastic pallet assembly is installed on a hardware pallet to form a module. The other is to adopt a CTP (Cell to Pack) structure, that is, large cylindrical batteries are grouped directly in the battery pack, and a plastic pallet assembly is set to separate the battery from the lower box to ensure insulation and battery support during the grouping process. In the related art, some plastic pallet assemblies are set as an integrated unit, and some are assembled in combination. Regardless of the integrated unit or the combined assembly, they need to be customized according to the arrangement of different large cylindrical batteries. SUMMARY OF THE INVENTION

[0004] However, for testing, prototyping, and small-batch delivery, using customized plastic pallet components is time-consuming, labor-intensive, and costly.

[0005] The present application provides a tray, which is arranged between the battery module and the lower box, and includes:

[0006] an insulating support plate, disposed on the lower box body, with a plurality of mounting holes formed on the insulating support plate, the plurality of mounting holes corresponding to the plurality of battery cells of the battery module; and

[0007] The support structure is arranged on the side surface of the insulating support plate away from the lower box body. The support structure includes multiple support seats corresponding to multiple mounting holes. Each support seat can be removably installed at the corresponding mounting hole. The multiple support seats are used to respectively support multiple battery cells of the battery module.

[0008] The present application also provides a tray assembly, which is provided between the battery module and the lower box, and the tray assembly includes:

[0009] A plurality of trays are provided on the lower box body, wherein the plurality of trays are arranged side by side in a first direction, each tray is arranged along a second direction, and each tray is provided with a support structure on a surface of a side facing away from the lower box body to jointly support the battery module; and

[0010] The buckle assembly is arranged between every two adjacent trays. The buckle assembly includes a buckle portion and a matching portion that cooperate with each other. The buckle portion and the matching portion are respectively arranged on the two trays.

[0011] The present application also provides a battery pack, comprising:

[0012] lower box;

[0013] A battery module comprising a plurality of cylindrical battery cell groups arranged side by side in a first direction, each cylindrical battery cell group comprising a plurality of cylindrical battery cells arranged side by side in a second direction; and

[0014] The tray assembly is arranged between the lower box and the battery module to support the battery module. Beneficial effects

[0015] The tray provided in the present application includes an insulating support plate and a support structure, the support structure includes a plurality of support seats, and a plurality of mounting holes are opened on the insulating support plate, and the arrangement of the mounting holes of the insulating support plate corresponds to the arrangement of battery cells in the battery module; the support seats can be detachably installed at the corresponding mounting holes, and the support seats are used to support the battery cells; that is, in the production process, especially for testing, proofing and small-batch delivery, since the battery cells are of the same size, universal support seats can be mass-produced according to the battery cell size; then, according to the actual battery cell arrangement of the battery module, a corresponding insulating support plate is designed and manufactured, and the arrangement of the mounting holes on the insulating support plate is the same as the battery cell arrangement, and then the support seat is installed on the insulating support plate. Since the support seat is detachable, not only can the support seat be reused, but the arrangement of the support seat can also be changed according to the battery cell arrangement, thereby improving the versatility of the support structure and eliminating the need for customized trays, thereby saving time and effort and reducing production costs.

[0016] The tray assembly provided in the present application is arranged in the lower box to support the battery module. The tray assembly includes multiple trays, and a snap assembly is provided between each two adjacent trays. The two adjacent trays are installed and fixed by the snap part and the matching part of the snap assembly; that is, in the actual assembly process, the two trays are aligned, and the snap parts and the matching parts on the two trays are respectively buckled and fixed to each other, so as to realize the installation and fixation of the two trays. Such a setting makes the installation between the trays more convenient and can also improve the assembly efficiency of the tray assembly.

[0017] The battery pack provided in this application adopts the above-mentioned tray assembly. During the actual assembly process, the two trays are aligned, and the snap-on parts and the mating parts on the two trays are respectively buckled and fixed to each other, thereby achieving the installation and fixation of the two trays. This arrangement makes the installation between the trays more convenient and can also improve the assembly efficiency of the tray assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the assembly of a battery pack provided by some implementations of the present application.

[0019] FIG2 is an exploded schematic diagram of the battery pack in FIG1 .

[0020] FIG3 is a structural diagram of the tray in FIG1 ;

[0021] FIG4 is a schematic structural diagram of the first support base in FIG3 ;

[0022] FIG5 is an exploded schematic diagram of the first support base in FIG4 ;

[0023] FIG6 is a cross-sectional view taken along AA in FIG4 ;

[0024] FIG7 is an enlarged schematic diagram of a portion B in FIG6 ;

[0025] FIG8 is a cross-sectional view taken along CC in FIG1 ;

[0026] FIG9 is an enlarged schematic diagram of a portion D in FIG8 ;

[0027] FIG10 is an enlarged schematic diagram of a portion E in FIG9 ;

[0028] FIG11 is a schematic structural diagram of a tray assembly provided in some implementations of the present application;

[0029] FIG12 is an enlarged schematic diagram of a portion F in FIG11 ;

[0030] FIG13 is a cross-sectional view taken along line GG in FIG11 ;

[0031] FIG14 is an enlarged schematic diagram of a portion H in FIG13 ;

[0032] FIG15 is a cross-sectional view taken along line II in FIG11;

[0033] FIG16 is an enlarged schematic diagram of a portion J in FIG15 ;

[0034] FIG17 is a schematic structural diagram of the tray assembly in FIG11;

[0035] FIG18 is an enlarged schematic diagram of a local K in FIG17 ;

[0036] FIG19 is a schematic structural diagram of the tray assembly in FIG11 from another perspective;

[0037] FIG20 is an enlarged schematic diagram of a portion L in FIG19 ;

[0038] FIG21 is an exploded schematic diagram of the tray in FIG11;

[0039] FIG22 is an enlarged schematic diagram of a portion M in FIG21 ;

[0040] FIG23 is a schematic diagram of the assembly of a tray assembly and a battery module provided by some implementations of the present application;

[0041] FIG24 is a schematic diagram of the assembly of the tray assembly, the battery module, and the lower box provided in some implementations of the present application.

[0042] Description of reference numerals:

[0043] Battery Pack-1000;

[0044] Tray assembly-100;

[0045] Tray 1; insulating support plate 11; mounting hole 111; support plate 112; first through hole 1121; insulating film 113; second through hole 1131; first support structure 12; first support seat 121; first seat body 1211; first pressure relief hole 12111; first annular groove 12112; second annular groove 12113; annular mounting platform 12114; annular protective plate 12115; first flat washer 1212; second flat washer 1213 ; first insulating sheet 1214; second supporting structure 13; supporting portion 131; annular support platform 1311; annular groove 132; first protrusion 14a; second protrusion 14b; gap 14c; overflow glue sealing strip 15; insulating plate 16; second pressure relief hole 161; groove body 162; overflow glue groove 163; second insulating sheet 17; avoidance hole 171; flexible support platform 18; flexible support rib 181; flexible support ring 182; support protrusion 19;

[0046] Buckle assembly-2; buckle portion-21; mating portion-22; snap hole-23; elastic clamping column-24; end-241; retaining boss-25;

[0047] Seal-3;

[0048] Battery module-200; Cylindrical battery cell assembly-201; Cylindrical battery cell-2011; Pressure relief structure-202; Pressure relief valve-2021;

[0049] Lower box-300;

[0050] First direction - F1; second direction - F2. Modes for Carrying Out the Invention

[0051] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0053] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0054] Example 1

[0055] This embodiment provides a tray 1. Referring to Figures 1 to 3 , the tray 1 is disposed between the battery module 200 and the lower case 300 and includes an insulating support plate 11 and a first support structure 12. The insulating support plate 11 is disposed on the lower case 300 and defines a plurality of mounting holes 111 corresponding to the plurality of battery cells 2011 of the battery module 200. The first support structure 12 is disposed on a side of the insulating support plate 11 facing away from the lower case 300 and includes a plurality of first support bases 121 corresponding to the plurality of mounting holes 111. Each first support base 121 is detachably mounted to a corresponding mounting hole 111. The plurality of first support bases 121 are configured to respectively support the plurality of battery cells 2011 of the battery module 200.

[0056] In some implementations of the present application, the tray 1 includes an insulating support plate 11 and a first support structure 12, the first support structure 12 includes a plurality of first support seats 121, a plurality of mounting holes 111 are opened on the insulating support plate 11, and the mounting holes 111 of the insulating support plate 11 are arranged corresponding to the arrangement of the battery cells 2011 of the battery module 200; the first support seats 121 can be detachably mounted at the corresponding mounting holes 111, and the first support seats 121 are used to support the battery cells 2011; that is, during the production process, especially for testing, proofing and small-batch delivery, since the size of the battery cells 2011 is the same, the size of the battery cells 2011 can be adjusted according to the size of the battery cells 2011. The first support base 121 is universally produced in batches; then, according to the actual arrangement of the battery cells 2011 of the battery module 200, a corresponding insulating support plate 11 is designed and produced, and the arrangement of the mounting holes 111 on the insulating support plate 11 is the same as the arrangement of the battery cells 2011, and then the first support base 121 is installed on the insulating support plate 11. Since the first support base 121 is detachable, not only can the first support base 121 be reused, but the arrangement of the first support base 121 can also be changed according to the arrangement of the battery cells 2011, thereby improving the versatility of the first support structure 12, and no customized tray is required, thereby saving time and effort and reducing production costs.

[0057] In some implementations, referring to FIG4 and FIG5, the first support seat 121 includes a first seat body 1211, a first flat washer 1212, a second flat washer 1213 and a first insulating sheet 1214; the first seat body 1211 is provided on a side surface of the insulating support plate 11 away from the lower box body 300, and the side surface of the first seat body 1211 away from the insulating support plate 11 is used for placing the power core 2011, and the first seat body 1211 has a first pressure relief hole 12111 corresponding to the position of the mounting hole 111 and connected to each other, and the first pressure relief hole 12111 and the pressure relief connection of the battery cell 2011 are connected. Structure 202 is arranged accordingly; the first flat washer 1212 is arranged on the side surface of the first base 1211 away from the insulating support plate 11, and is arranged in a ring around the periphery of the first pressure relief hole 12111, and the first flat washer 1212 is in contact with the battery cell 2011; the second flat washer 1213 is arranged on the side surface of the first base 1211 facing the insulating support plate 11, and is arranged in a ring around the periphery of the first pressure relief hole 12111, and the side surface of the second flat washer 1213 away from the first base 1211 is adhered and fixed to the insulating support plate 11; the first insulating sheet 1214 is arranged in the first pressure relief hole 12111.

[0058] Based on the structure of the above-mentioned implementation method, please refer to Figures 8 to 10. A first flat washer 1212 and a second flat washer 1213 are provided on the first seat body 1211, and the first seat body 1211 is adhered to the insulating support plate 11 through the second flat washer 1213, so that the first support seat 121 can be detachably installed. The structure is simple, the cost is low, and the disassembly and assembly are convenient; when the battery has thermal runaway, the pressure relief structure 202 of the battery cell 2011 opens, and the gas passes through the first pressure relief hole 12111 and flows to the first insulating sheet 1214. When the gas pressure is relieved to a certain extent, it will break through the first insulating sheet 1214 and flow to the mounting hole 111, thereby achieving the purpose of pressure relief. Furthermore, by arranging the first flat washer 1212 and the second flat washer 1213 on the two opposite sides of the first seat body 1211, since the first flat washer 1212 and the second flat washer 1213 made of soft rubber material have a certain elasticity, when the battery cell 2011 is placed on the first seat body 1211, the gravity of the battery cell 2011 and the pressure holding pressure cause the first flat washer 1212 and the second flat washer 1213 to be compressed to form a sealed interface, thereby preventing glue from overflowing into the first pressure relief hole 12111, thereby improving the production yield of the battery pack 1000 and improving the life and durability of the battery pack 1000. Safety of use; in addition, since the first flat washer 1212 and the second flat washer 1213 will produce compression deformation after being subjected to the gravity of the battery cell 2011 and the holding pressure, the flatness tolerance between the contact surface of the first seat 1211 and the insulating support plate 11 can be reduced after the battery module 200 is placed on the tray, and the height uniformity of the battery cell 2011 pole is ensured during CCS welding, the welding failure rate is reduced, the difficulty of assembling the battery cell 2011 can be reduced, and the dimensional tolerance of the battery cell 2011 can be absorbed, thereby reducing the production cost of the battery cell 2011 and improving the production qualification rate.

[0059] It is understandable that the present application does not limit the pressure relief structure 202 of the battery cell 2011 . In some implementations, the pressure relief structure 202 may be configured as a pressure relief valve 2021 .

[0060] This application does not limit the specific form of the first insulating sheet 1214. In some implementations, the first insulating sheet 1214 is mica paper. Mica paper is thin and has excellent insulation and high-temperature resistance. It not only prevents glue from leaking between the battery cell 2011 and the first base 1211, but also ensures that the first insulating sheet 1214 can be broken by gas in the event of thermal runaway of the battery cell 2011, thereby ensuring the safety of the battery module 200. In actual applications, the material of the first insulating sheet 1214 is not limited to the mica paper in the above embodiment, but can also be other insulating materials with good high-temperature resistance and low strength that are easily broken. This is not a sole limitation here.

[0061] Please refer to Figures 6 and 7. A first annular groove 12112 is provided on the surface of the first base body 1211 on one side facing away from the insulating support plate 11. A second annular groove 12113 is provided on the surface of the first base body 1211 on the one side facing the insulating support plate 11. The first annular groove 12112 and the second annular groove 12113 are both correspondingly arranged around the periphery of the first pressure relief hole 12111. The first flat washer 1212 is installed in the first annular groove 12112, and the second flat washer 1213 is installed in the second annular groove 12113. By setting the first annular groove 121 12 and the second annular groove 12113 are used to install the first flat washer 1212 and the second flat washer 1213, which can not only improve the installation stability of the first flat washer 1212 and the second flat washer 1213 and prevent the first flat washer 1212 and the second flat washer 1213 from falling off, but also reduce the height of the first flat washer 1212 and the second flat washer 1213, thereby reducing the overall height of the first support seat 121, and more easily reduce the flatness tolerance between the contact surface of the first seat body 1211 and the insulating support plate 11 after the tray 1 is placed on the battery module 200.

[0062] In some implementations, the inner wall of at least one side of the first annular groove 12112 is expanded outward toward its groove opening, and the inner wall of at least one side of the second annular groove 12113 is expanded outward toward its groove opening. Such a configuration can facilitate the placement of the first flat washer 1212 in the first annular groove 12112 and the placement of the second flat washer 1213 in the second annular groove 12113, thereby further improving assembly efficiency.

[0063] In addition, the width of the first annular groove 12112 can be set to be greater than the width of the first flat washer 1212, and the width of the second annular groove 12113 can be set to be greater than the width of the second flat washer 1213. In this way, the first flat washer 1212 can be placed in the first annular groove 12112, and the second flat washer 1213 can be placed in the second annular groove 12113.

[0064] It can be understood that in order to ensure the functions of the first flat washer 1212 and the second flat washer 1213, the first flat washer 1212 can be higher than the notch of the first annular groove 12112, or it can be flush with the notch of the first annular groove 12112; the second flat washer 1213 can be higher than the notch of the second annular groove 12113, or it can be flush with the notch of the second annular groove 12113.

[0065] Please refer to Figures 5 to 7. The inner wall of the first pressure relief hole 12111 protrudes inward to form an annular mounting platform 12114; wherein, the first insulating sheet 1214 is arranged on the annular mounting platform 12114 and is located on the side of the annular mounting platform 12114 away from the insulating support plate 11; by providing the annular mounting platform 12114 to accommodate the first insulating sheet 1214, the installation stability of the first insulating sheet 1214 can be improved.

[0066] In some implementations, the inner wall of the first pressure relief hole 12111 is expanded outward near the opening of the first pressure relief hole 12111 from the annular mounting platform 12114. This arrangement facilitates placement of the first insulating sheet 1214 in the first pressure relief hole 12111, thereby further improving assembly efficiency.

[0067] The present application does not limit the specific installation method of the first insulating sheet 1214. In some implementations, the first insulating sheet 1214 is fixed to the annular mounting platform 12114 by adhesive, which is simple and convenient to operate.

[0068] Please refer to Figures 6 and 7 again. A ring-shaped protective plate 12115 is formed on the side surface of the first base 1211 facing the insulating support plate 11 and protrudes and extends at the periphery corresponding to the first pressure relief hole 12111. The ring-shaped protective plate 12115 extends downward and is inserted into the mounting hole 111.

[0069] In some implementations, the outer wall of the annular protective plate 12115 is gradually retracted in the direction away from the first seat body 1211, that is, the outer diameter of the annular protective plate 12115 gradually becomes smaller in the direction away from the first seat body 1211. Such a setting is conducive to the smooth insertion of the annular protective plate 12115 into the mounting hole 111, thereby further improving the assembly efficiency.

[0070] In the present application, the first flat washer 1212 is fixed to the first base 1211 by adhesive.

[0071] In the present application, the second flat washer 1213 is fixed to the first base 1211 by adhesive.

[0072] It should be noted that the above two technical features can be set selectively or simultaneously. Specifically, in some implementations, the above two technical features are set simultaneously, that is, the first flat washer 1212 is fixed to the first base body 1211 by glue, and the second flat washer 1213 is fixed to the first base body 1211 by glue; fixation by glue has a simple structure, easy operation and low cost.

[0073] The present application does not limit the specific form of the insulating support plate 11 . The insulating support plate 11 can be made of an insulating material, or can be made of a metal material with an insulating film 113 added thereto.

[0074] Please refer to FIG. 2 again. In some implementations, the insulating support plate 11 includes a support plate 112 and an insulating film 113. The support plate 112 is provided on the lower box body 300, and a plurality of first through holes 1121 are formed on the support plate 112. The insulating film 113 is attached to a surface of the support plate 112 facing away from the lower box body 300, and a plurality of second through holes 1131 are formed on the insulating film 113. The plurality of second through holes 1131 correspond to the plurality of first through holes 1121 one by one. The mounting holes 111 include the first through holes 1121. and a second through hole 1131; the first support seat 121 is detachably mounted on the side surface of the insulating film 113 facing away from the support plate 112; it can be understood that when the material of the support plate 112 is metal, in order to support the lower box body 300 and the battery module 200 while serving as an insulator to separate the lower box body 300 and the battery module 200, it is necessary to provide an insulating film 113 on the side surface of the support plate 112 facing away from the lower box body 300, and realize the insulation separation of the lower box body 300 and the battery module 200 through the insulating film 113.

[0075] In some implementations, the insulating film 113 is hot pressed onto the support plate 112. In actual applications, the installation process of the insulating film 113 is not limited to the hot pressing in the above embodiment, and the insulating film 113 can also be attached to the insulating support plate 11 by other methods. This is not the only limitation here.

[0076] Example 2

[0077] This embodiment provides a tray assembly 100, please refer to Figures 11, 12, 23 and 24. The tray assembly 100 is arranged between the battery module 200 and the lower box body 300, and the tray assembly 100 includes multiple trays 1 and a snap assembly 2; multiple trays 1 are arranged in the lower box body 300, and the multiple trays 1 are arranged side by side in a first direction F1, and each tray 1 is arranged along a second direction F2. Each tray 1 is provided with a second supporting structure 13 on the side surface away from the lower box body 300 to jointly support the battery module 200; the snap assembly 2 is provided between each two adjacent trays 1, and the snap assembly 2 includes a snap portion 21 and a mating portion 22 respectively provided on the two trays 1, and the snap portion 21 and the mating portion 22 are buckled and fixed to each other.

[0078] In an embodiment of the present application, a tray assembly 100 is provided in the lower box body 300 to support the battery module 200. The tray assembly 100 includes a plurality of trays 1. A snap assembly 2 is provided between each two adjacent trays 1. The two adjacent trays 1 are installed and fixed by the snap portion 21 and the mating portion 22 of the snap assembly 2; that is, in the actual assembly process, the two trays 1 are aligned, and the snap portions 21 and the mating portions 22 on the two trays 1 are respectively buckled and fixed to each other, thereby realizing the installation and fixation of the two trays 1. Such a setting makes the installation between the trays 1 more convenient and can also improve the assembly efficiency of the tray assembly 100.

[0079] This application does not limit the specific location and form of the snap portion 21 and the matching portion 22 .

[0080] In some implementations, two adjacent trays 1 include a first tray and a second tray, and the first tray has two latching arms protruding and extending along the first direction on a side surface facing the second tray and near its two ends in the second direction, and the two latching arms are both extended toward the second tray, and a socket is provided on the outer side of each latching arm; the second tray has two plug-in slots on a side surface facing the first tray and near its two ends in the second direction, and a latching protrusion is provided on the inner wall of each plug-in slot; the two latching arms are respectively inserted into the two plug-in slots, and the latching protrusion on the inner wall of each plug-in slot is latched into the socket of the corresponding latching arm; wherein, the latching portion 21 includes two latching arms, and the mating portion 22 includes two plug-in slots.

[0081] In another implementation, please refer to Figures 13 to 16. In two adjacent pallets 1, the two pallets 1 have a first protrusion 14a and a second protrusion 14b protruding from two opposite side walls in the first direction F1, respectively. The first protrusion 14a and the second protrusion 14b extend along the second direction F2. The first protrusion 14a and the second protrusion 14b are staggered in the upper and lower directions, and a gap 14c is formed between the first protrusion 14a and the second protrusion 14b in the upper and lower directions. The pallet assembly 100 also includes a plurality of overflow glue sealing strips 15, each overflow glue sealing strip 15 is arranged in a gap 14c.

[0082] In addition, please refer to Figures 17 and 18. In the upper and lower directions, on the two opposite side surfaces of the first protrusion 14a and the second protrusion 14b, one of them is provided with a snap-in hole 23, and the other is provided with an elastic snap-in column 24. The elastic snap-in column 24 is arranged corresponding to the snap-in hole 23, and one end 241 of the elastic snap-in column 24 is passed through the snap-in hole 23. A retaining boss 25 is provided on one side of the outer wall of the elastic snap-in column 24 at a position close to the end 241, which is retaining and fixed with the periphery of the snap-in hole 23; wherein, the snap-in portion 21 includes the snap-in hole 23, and the mating portion 22 includes the elastic snap-in column 24.

[0083] That is to say, in this embodiment, when assembling the trays 1, it is only necessary to align the first protrusion 14a and the second protrusion 14b of the two adjacent trays 1, and insert the elastic clamping column 24 into the clamping hole 23, and the retaining boss 25 on the elastic clamping column 24 is clamped and fixed to the periphery of the clamping hole 23. With this arrangement, the installation between the two adjacent trays 1 is more convenient, thereby improving the assembly efficiency; at the same time, a glue overflow sealing strip 15 is added between the two trays 1 to prevent glue overflow, thereby improving the production yield of the battery pack 1000.

[0084] It should be noted that in order to facilitate the installation of the overflow glue sealing strip 15, at least one side of the overflow glue sealing strip 15 is adhered and fixed to the corresponding first protrusion 14a or the second protrusion 14b by glue; that is, the overflow glue sealing strip 15 is adhered to the first protrusion 14a or the second protrusion 14b by glue. At this time, the overflow glue sealing strip 15 has been adhered and fixed. Such a setting not only makes the installation of the overflow glue sealing strip 15 more convenient, but also prevents the overflow glue sealing strip 15 from interfering with the assembly of the pallet 1.

[0085] It should be noted that this application does not impose specific limitations on the structure of tray 1. In some implementations, tray 1 can be configured as tray 1 in the first embodiment. In other words, tray 1 possesses all the technical features of tray 1 in the first embodiment. In other words, tray assembly 100 includes all the embodiments of tray 1 in the first embodiment and thus possesses the beneficial effects of all of the aforementioned embodiments, which will not be detailed here. Correspondingly, second support structure 13 also includes all the technical features of first support structure 12 in tray 1 in the first embodiment.

[0086] In other implementations, referring to Figures 19 to 22, the tray 1 includes an insulating plate 16 and a second insulating sheet 17. The insulating plate 16 is provided on the lower box body 300. The side surface of the insulating plate 16 facing away from the lower box body 300 is used for mounting the battery module 200. The insulating plate 16 is provided with a plurality of second pressure relief holes 161 corresponding to the positions of the plurality of battery cells 2011 of the battery module 200. The second insulating sheet 17 is provided on the side surface of the insulating plate 16 facing the lower box body 300 and covers the plurality of second pressure relief holes 161. Pressure relief holes 161; wherein, the second support structure 13 includes a plurality of support portions 131 corresponding one-to-one to the plurality of second pressure relief holes 161, and the plurality of support portions 131 are arranged on the side surface of the insulating plate 16 away from the lower box body 300, and are arranged corresponding to the periphery of the second pressure relief holes 161; when the battery has thermal runaway, the battery pressure relief structure opens, and the gas passes through the second pressure relief holes 161 and flows to the second insulating sheet 17. When the gas pressure is relieved to a certain extent, it will break through the second insulating sheet 17 and flow out, thereby achieving the purpose of pressure relief.

[0087] In some implementations, please refer to Figures 19 and 22 again. An annular support platform 1311 is protruding from the side surface of the insulating plate 16 facing away from the lower box body 300 and corresponding to the position of the periphery of each second pressure relief hole 161 to support the battery cell 2011 corresponding to the battery module 200; wherein, the support portion 131 includes a plurality of annular support platforms 1311; by providing the second support structure 13, the end face of the second support structure 13 is higher than the orifice of the second pressure relief hole 161, and when pouring glue, the glue will not overflow from the second pressure relief hole 161, thereby further improving the production yield of the battery pack 1000.

[0088] 21 and 22 , each annular support platform 1311 is provided with an annular groove 132 on the end surface of the insulating plate 16 facing away from the lower box body 300; the tray assembly 100 further includes a sealing ring 3, which is arranged in the annular groove 132 and partially protrudes from the notch of the annular groove 132; by arranging the sealing ring 3 on the annular support platform 1311, since the sealing ring 3 made of soft rubber material has a certain elasticity, when the battery cell 2011 is placed on the annular support platform 1311, the gravity of the battery cell 2011 and the pressure holding pressure cause the sealing ring 3 to be compressed to form a sealing interface, thereby preventing glue from overflowing to the second pressure relief hole 161 The problem of the above problem can be solved, thereby improving the production yield of the battery pack 1000, and improving the life and safety of the battery pack 1000. In addition, since the sealing ring 3 will be compressed and deformed after the gravity of the battery cell 2011 and the pressure holding pressure, the flatness tolerance between the contact surface of the annular support platform 1311 and the insulating plate 16 after the battery module 200 is placed on the tray 1 can be reduced, and the height uniformity of the battery cell 2011 pole is guaranteed during CCS welding, which reduces the welding failure rate, reduces the difficulty of assembling the battery cell 2011, and absorbs the dimensional tolerance of the battery cell 2011, thereby reducing the production cost of the battery cell 2011 and improving the production qualification rate.

[0089] In some implementations, a plurality of grooves 162 are provided on a surface of the insulating plate 16 facing away from the lower box body 300 . Each groove 162 is arranged around the periphery of the corresponding second pressure relief hole 161 . The plurality of grooves 162 are connected to form a glue overflow groove 163 .

[0090] Furthermore, the trough body 162 can be formed by two adjacent annular support platforms 1311 . That is, each trough body 162 can be shared by two adjacent annular support platforms 1311 , thereby saving costs and ensuring the arrangement density of the battery cells 2011 .

[0091] Please refer to Figures 19 to 21. A plurality of avoidance holes 171 are provided on the second insulating sheet 17. The tray assembly 100 further includes a plurality of flexible support platforms 18. The plurality of flexible support platforms 18 correspond to the plurality of avoidance holes 171 one by one. Each flexible support platform 18 includes a flexible support rib 181 and a flexible support ring 182. The flexible support rib 181 is provided on the surface of the side of the insulating plate 16 away from the lower box 300 and is passed through the corresponding avoidance hole 171. The flexible support ring 182 is provided on the side of the second insulating sheet 17 away from the insulating plate 16 and is sleeved on the flexible support ring 182. The flexible support rib 181 is arranged on the outside of the battery module 200, and the battery module 200 is further isolated from the lower box body 300. At the same time, since the flexible support platform 18 is made of soft rubber material, when the flexible support platform 18 contacts the lower box body 300, it can reduce shock for the tray assembly 100 and the battery module 200. Moreover, the structural design of the flexible support rib 181 and the flexible support ring 182 can install the second insulating sheet 17 on the insulating plate 16, so that the installation of the second insulating sheet 17 is simple and stable.

[0092] In addition, please refer to Figure 24, the tray assembly 100 also includes a plurality of support protrusions 19, and the plurality of support protrusions 19 are provided on the lower box body 300, and correspond one-to-one to the plurality of flexible support platforms 18, and each support protrusion 19 is in contact with the corresponding flexible support platform 18; by providing a plurality of support protrusions 19 for support, the structure is simple and the cost is low; but at the same time, if only the support protrusions 19 are used to support the insulating plate 16, the insulating plate 16 may be partially ruptured due to the small contact area and stress concentration, and the support protrusions 19 are abutted against the flexible support platform 18, so that the flexible support platform 18 can play a flexible buffering role on the one hand, and on the other hand, the contact area between the support protrusions 19 and the insulating plate 16 is increased, thereby avoiding partial rupture of the insulating plate 16.

[0093] Example 3

[0094] This embodiment provides a battery pack 1000. Referring to Figures 23 and 24, the battery pack 1000 includes a lower case 300, a battery module 200, and a tray assembly 100. The battery module 200 includes a plurality of cylindrical cell groups 201 arranged side by side in a first direction F1. Each cylindrical cell group 201 includes a plurality of cylindrical battery cells 2011 arranged side by side in a second direction F2. The tray assembly 100 is disposed between the lower case 300 and the battery module 200 to support the battery module 200.

[0095] In some implementations of the present application, the tray 1 in the tray assembly 100 is set to the tray 1 in the first embodiment, that is, the tray 1 has all the technical features of the tray 1 in the first embodiment, that is, the tray assembly 100 includes all embodiments of the tray 1 in the first embodiment, and also has the beneficial effects brought by all the above embodiments.

[0096] Please refer to Figure 1. The tray 1 includes an insulating support plate 11 and a first support structure 12. The second support structure 13 includes a plurality of first support seats 121. A plurality of mounting holes 111 are opened on the insulating support plate 11. The mounting holes 111 of the insulating support plate 11 are arranged corresponding to the arrangement of the battery cells 2011 of the battery module 200. The first support seats 121 can be detachably installed at the corresponding mounting holes 111. The first support seats 121 are used to support the battery cells 2011. That is to say, during the production process, especially for testing, proofing and small batch delivery, since the size of the battery cells 2011 is the same, they can be batched according to the size of the battery cells 2011. A universal first support seat 121 is made; then, according to the actual arrangement of the battery cells 2011 of the battery module 200, a corresponding insulating support plate 11 is designed and made, and the arrangement of the mounting holes 111 on the insulating support plate 11 is the same as the arrangement of the battery cells 2011, and then the first support seat 121 is installed on the insulating support plate 11. Since the first support seat 121 is detachable, not only can the first support seat 121 be reused, but the arrangement of the first support seat 121 can also be changed according to the arrangement of the battery cells 2011, thereby improving the versatility of the first support structure 12, eliminating the need for customized trays, thereby saving time and effort and reducing production costs.

Claims

1. A tray (1), arranged between a battery module (200) and a lower box (300), characterized in that: The tray (1) comprises: an insulating support plate (11) disposed on the lower box body (300), the insulating support plate (11) being provided with a plurality of mounting holes (111), the plurality of mounting holes (111) corresponding to a plurality of battery cells (2011) of the battery module (200); and, The first support structure (12) is arranged on a side surface of the insulating support plate (11) facing away from the lower box body (300), and the first support structure (12) includes a plurality of first support seats (121) corresponding to the plurality of mounting holes (111), and each of the first support seats (121) can be detachably mounted at the corresponding mounting hole (111), and the plurality of first support seats (121) are used to respectively support the plurality of battery cells (2011) of the battery module (200).

2. The pallet (1) according to claim 1, characterized in that: The first support seat (121) comprises: A first seat (1211) is arranged on a side surface of the insulating support plate (11) facing away from the lower box (300); the side surface of the first seat (1211) facing away from the insulating support plate (11) is used to place the electric core (2011); the first seat (1211) has a first pressure relief hole (12111) corresponding to the position of the mounting hole (111) and connected to each other; the first pressure relief hole (12111) is arranged corresponding to the pressure relief structure of the electric core (2011); A first flat washer (1212), arranged on a side surface of the first seat (1211) facing away from the insulating support plate (11), and arranged around the periphery of the first pressure relief hole (12111), the first flat washer (1212) being in contact with the battery core (2011); A second flat washer (1213) is provided on a side surface of the first seat body (1211) facing the insulating support plate (11) and is arranged around the periphery of the first pressure relief hole (12111); a side surface of the second flat washer (1213) facing away from the first seat body (1211) is adhered and fixed to the insulating support plate (11); and, A first insulating sheet (1214), wherein the first insulating sheet (1214) is disposed in the first pressure relief hole (12111).

3. The pallet (1) according to claim 2, characterized in that: A first annular groove (12112) is provided on a side surface of the first seat body (1211) facing away from the insulating support plate (11), and a second annular groove (12113) is provided on a side surface of the first seat body (1211) facing the insulating support plate (11), and the first annular groove (12112) and the second annular groove (12113) are both correspondingly arranged around the periphery of the first pressure relief hole (12111); Wherein, the first flat washer (1212) is installed in the first annular groove (12112), The second flat washer (1213) is installed in the second annular groove (12113).

4. The pallet (1) according to claim 2, characterized in that: The inner wall of the first pressure relief hole (12111) protrudes inward to form an annular mounting platform (12114); Wherein, the first insulating sheet (1214) is arranged on the annular mounting platform (12114) and is located on a side of the annular mounting platform (12114) facing away from the insulating support plate (11).

5. The pallet (1) according to claim 4, characterized in that: The first insulating sheet (1214) is fixed to the annular mounting platform (12114) by means of glue.

6. The pallet (1) according to claim 2, characterized in that: An annular protective plate (12115) is formed on a side surface of the first seat body (1211) facing the insulating support plate (11) and protrudes and extends at the periphery corresponding to the first pressure relief hole (12111), and the annular protective plate (12115) extends downward and is inserted into the mounting hole (111).

7. The pallet (1) according to any one of claims 2 to 6, characterized in that: The first flat washer (1212) is fixed to the first seat (1211) by adhesive; and / or, The second flat washer (1213) is fixed to the first seat body (1211) by means of glue.

8. The pallet (1) according to claim 1, characterized in that The insulating support plate (11) comprises: A support plate (112) is disposed on the lower box body (300), and a plurality of first through holes (1121) are formed on the support plate (112); and, An insulating film (113) is attached to a surface of a side of the support plate (112) facing away from the lower box (300), and a plurality of second through holes (1131) are formed on the insulating film (113), and the plurality of second through holes (1131) correspond one-to-one to the plurality of first through holes (1121); Wherein, the mounting hole (111) comprises the first through hole (1121) and the second through hole (1131); The first support seat (121) is detachably mounted on a surface of a side of the insulating film (113) that is away from the support plate (112).

9. The pallet (1) according to claim 8, characterized in that The insulating film (113) is hot pressed onto the supporting plate (112).

10. A tray assembly (100), arranged between a battery module (200) and a lower box (300), characterized in that: The tray assembly (100) comprises: A plurality of trays (1) are arranged on the lower box (300), the plurality of trays (1) are arranged side by side in a first direction (F1), each of the trays (1) is arranged along a second direction (F2), and each of the trays (1) is provided with a second supporting structure (13) on a surface of a side facing away from the lower box (300) to jointly support the battery module (200); and, A buckle assembly (2) is arranged between each two adjacent trays (1), and the buckle assembly (2) comprises a buckle portion (21) and a matching portion (22) that cooperate with each other, and the buckle portion (21) and the matching portion (22) are respectively arranged on the two trays (1).

11. The tray assembly (100) according to claim 10, characterized in that: The tray (1) is configured as a tray (1) according to any one of claims 1 to 9; The second supporting structure (13) comprises the first supporting structure (12) in the tray (1).

12. The tray assembly (100) according to claim 10, characterized in that: In two adjacent trays (1), a first convex portion (14a) and a second convex portion (14b) are respectively provided on two side walls opposite to each other in a first direction (F1), the first convex portion (14a) and the second convex portion (14b) both extend along a second direction (F2), the first convex portion (14a) and the second convex portion (14b) are staggered in an up-down direction, and a gap (14c) is formed between the first convex portion (14a) and the second convex portion (14b) in an up-down direction; The tray assembly (100) further comprises a plurality of overflow glue sealing strips (15), each of the overflow glue sealing strips (15) being arranged in one of the gaps (14c).

13. The tray assembly (100) according to claim 12, characterized in that: In the up-down direction, on two side surfaces of the first protrusion (14a) and the second protrusion (14b) opposite to each other, one of them is provided with a clamping hole (23), and the other is provided with an elastic clamping column (24), the elastic clamping column (24) is arranged corresponding to the clamping hole (23), one end (241) of the elastic clamping column (24) is inserted into the clamping hole (23), and a buckling boss (25) is provided on one side outer wall of the elastic clamping column (24) at a position close to the end (241), and the buckling boss (25) is buckled and fixed to the periphery of the clamping hole (23); Wherein, the buckle portion (21) includes the elastic clamping column (24), and the matching portion (22) includes the clamping hole (23).

14. The tray assembly (100) according to claim 10, characterized in that: The tray (1) comprises: an insulating plate (16) disposed on the lower box body (300); a surface of the insulating plate (16) on one side facing away from the lower box body (300) is provided for mounting the battery module (200); and a plurality of second pressure relief holes (161) are provided on the insulating plate (16) at positions corresponding to the plurality of cylindrical cells (2011) of the battery module (200); and, A second insulating sheet (17), provided on a surface of the insulating plate (16) facing the lower box (300), and covering the plurality of second pressure relief holes (161); The second supporting structure (13) comprises a plurality of supporting portions (131) corresponding one-to-one to the plurality of second pressure relief holes (161); the plurality of supporting portions (131) are arranged on a surface of a side of the insulating plate (16) facing away from the lower box body (300), and are arranged corresponding to the periphery of the second pressure relief holes (161).

15. The tray assembly (100) according to claim 14, characterized in that: An annular support platform (1311) is protrudingly provided on a side surface of the insulating plate (16) facing away from the lower box body (300) and at a position corresponding to the periphery of each of the second pressure relief holes (161) to support the cylindrical battery core (2011) corresponding to the battery module (200); Wherein, the support structure (131) includes a plurality of annular support platforms (1311).

16. The tray assembly (100) according to claim 15, characterized in that: Each of the annular support platforms (1311) is provided with an annular groove (132) on the end surface of the insulating plate (16) facing away from the lower box body (300); The tray assembly (100) further comprises a sealing ring (3), wherein the sealing ring (3) is arranged in the annular groove (132) and partially protrudes from the notch of the annular groove (132).

17. The tray assembly (100) according to claim 14, characterized in that: The second insulating sheet (17) is provided with a plurality of avoidance holes (171); The tray assembly (100) further comprises a plurality of flexible support platforms (18), wherein the plurality of flexible support platforms (18) correspond one to one with the plurality of avoidance holes (171), and each of the flexible support platforms (18) comprises a flexible support rib (181) and a flexible support ring (182), wherein the flexible support rib (181) is arranged on a side surface of the insulating plate (16) away from the lower box body (300) and is penetrated through the corresponding avoidance hole (171), and the flexible support ring (182) is arranged on a side of the second insulating sheet (17) away from the insulating plate (16) and is sleeved on the outer side of the flexible support rib (181).

18. The tray assembly (100) according to claim 17, characterized in that: The tray assembly (100) further comprises a plurality of supporting protrusions (19), wherein the plurality of supporting protrusions (19) are arranged on the lower box body (300) and correspond one-to-one to the plurality of flexible supporting platforms (18), and each of the supporting protrusions (19) is in contact with the corresponding flexible supporting platform (18).

19. The tray assembly (100) according to any one of claims 15 to 18, characterized in that: A plurality of grooves (162) are arranged on a surface of a side of the insulating plate (16) facing away from the lower box body (300), each of the grooves (162) is arranged around the periphery of the corresponding second pressure relief hole (161), and the plurality of grooves (162) are connected to form a glue overflow groove (163).

20. A battery pack (1000), characterized in that: include: Lower box(300); A battery module (200), comprising a plurality of cylindrical battery cell groups (201) arranged side by side in a first direction (F1), each of the cylindrical battery cell groups (201) comprising a plurality of cylindrical battery cells (2011) arranged side by side in a second direction (F2); and The tray assembly (100) according to any one of claims 10 to 19, wherein the tray assembly (100) is disposed between the lower box (300) and the battery module (200) to support the battery module (200).

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