Battery device and assembly method thereof, assembly equipment, and battery assembly positioning tool

Abstract

The present application relates to the field of battery technology, and discloses a battery device and its assembly method, assembly equipment, and battery assembly positioning tooling. The battery device includes a beam, a box bottom plate, a box frame, and a battery. The beam, the box bottom plate, and the box frame form a box, and the battery is arranged in the box; the assembly method includes the following steps: the beam, the box bottom plate, and the box frame are respectively connected and assembled with the battery in a set sequence, and in the set sequence, the box bottom plate or at least part of the box frame is assembled after the beam. The assembly method of the battery device provided in the present application is not easy to produce factors that affect the yield of the battery device, and can avoid problems such as poor box consistency caused by welding, poor assembly and insulation failure caused by welding slag and welds, etc.; moreover, the assembly process and process are simpler, and the entire assembly process can be seamlessly connected, which is conducive to creating a fully automated production line, improving production efficiency, and realizing high-speed manufacturing and high-yield manufacturing.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery device and an assembly method thereof, assembly equipment, and a battery assembly positioning tool. Background Art

[0002] In the existing design, the battery pack is assembled by assembling the battery case and then placing the batteries into the case in groups, that is, the case is assembled first and then the battery pack is assembled. Therefore, the assembly process of the battery pack is relatively complicated and inefficient, and it is difficult to achieve automated production. In addition, the transportation process of the case and the battery will also bring a series of unstable factors, resulting in a reduction in yield. Summary of the invention

[0003] The present invention provides a battery device and an assembly method thereof, an assembly device, and a battery assembly positioning tool, which are used to improve the assembly process of the battery device and increase production efficiency.

[0004] In a first aspect, the present application provides an assembly method of a battery device, wherein the battery device comprises a beam, a box bottom plate, a box frame, and a battery, wherein the beam, the box bottom plate, and the box frame form a box, and the battery is disposed in the box; the assembly method comprises the following steps:

[0005] The beam, the box bottom plate and the box frame are respectively connected and assembled with the battery in a set sequence, wherein the box bottom plate or at least a part of the box frame is assembled after the beam.

[0006] The assembly method of the battery device provided in the present application does not require the pre-assembly of the box of the battery device, but integrates the assembly process of the battery with the assembly steps of the box. First, the battery is connected to a part of the structure (beam, box frame or box bottom plate) used to form the box, and then the remaining parts used to form the box are installed to form a complete box. After the battery is assembled, the complete box is assembled. In this way, the entire assembly process is seamlessly connected and factors that affect the yield of the battery device are not easily generated; for example, when assembling the battery, it only needs to be connected to a part of the box structure. The battery does not need to be assembled by over-pressing and vertically inserting into the box, and is not restricted by the box structure, which is conducive to improving assembly efficiency and yield; and The various parts of the box structure installed successively can be connected by non-welding forms such as bonding and / or fasteners. Compared with the method of welding the box body into a box body in advance and then assembling the battery, this can avoid problems such as poor box consistency caused by welding, poor assembly and insulation failure caused by welding slag and welds, etc.; and the assembly method of the present application, through the innovation of the integrated assembly method of battery to battery device, breaks the traditional model of independent box manufacturing, highly integrates the box manufacturing process and the system assembly process, and the assembly process and process are simpler, and can achieve seamless connection of the entire assembly process, which is conducive to creating a fully automated production line, improving production efficiency, achieving high-speed manufacturing, high-yield manufacturing, and helping to reduce preparation costs. In addition, if the box is surrounded by a box frame and a box bottom plate, and the battery has been assembled in the box, and then the beam is assembled, the beam may not be able to be assembled into the box due to assembly tolerance. If it is forced in, the box may be deformed. If the battery is squeezed, the battery may be deformed or damaged, affecting the battery life. In the assembly scheme of the present application, the beam is placed before the box bottom plate or at least part of the box frame for assembly, and the beam is not assembled last, that is, before the beam is assembled, a complete box is not formed. This can reduce the assembly space restriction of the box structure on the beam, avoid the above-mentioned assembly problems, and further improve the assembly efficiency and yield.

[0007] In a second aspect, the present application provides a battery device, which is prepared using the assembly method of the battery device as described above; the battery device includes a box body assembled from a beam, a box body frame and a box body bottom plate, and a battery located in the box body.

[0008] Specifically, the battery device provided in the present application is used to form different partial structures of the box body (beams, box body frames or box body bottom plates) which are directly integrated and assembled with the battery. Therefore, the entire assembly process is seamlessly connected, the assembly process and process are simple, the degree of automation is high, and it is not easy to produce factors that affect the product yield of the battery device, which can improve the consistency and yield of the battery device assembly; moreover, when assembling the battery, it is only necessary to connect the battery to part of the box body structure. The battery does not need to be assembled by over-pressurizing and vertically inserting into the box body, and is not restricted by the box body structure, which is conducive to improving the assembly efficiency and yield; and the various parts of the box body structures installed successively are connected by non-welding forms such as bonding and / or fasteners. Compared with the method of welding the box body into a box body in advance and then assembling the battery, it can avoid problems such as poor box consistency caused by welding, poor assembly and insulation failure caused by welding slag and welds, etc., which can further improve the yield of the battery device.

[0009] In a third aspect, the present application provides a battery device assembly device, the battery device assembly device is used to perform the steps in the above-mentioned battery device assembly method; the assembly device comprises:

[0010] A first assembly mechanism is configured to assemble and fix the beam and the battery;

[0011] The second assembly mechanism is configured to assemble the box bottom plate and / or at least a portion of the box frame on the assembly formed by assembling the beam and the battery.

[0012] The battery device assembly equipment provided in this embodiment is used to execute the processes in the above-mentioned battery device assembly method, and can realize the automation of the full-process assembly operation of the entire battery device, effectively improve the production efficiency of the battery device, and improve the assembly yield of the battery device.

[0013] In a fourth aspect, the present application provides a battery assembly positioning tool, which is used to position at least part of the components constituting a battery device during the assembly process of the battery device; the battery device includes a beam, a box bottom plate, a box frame and a battery, the beam, the box bottom plate and the box frame form a box, and the battery is arranged in the box;

[0014] The battery assembly positioning tool includes a supporting plate and a positioning structure located on the supporting plate, wherein the supporting plate is used to support at least one of the box frame, the beam and the battery, and the positioning structure is used to position at least one of the box frame, the beam and the battery.

[0015] The battery assembly positioning tool provided in this embodiment can be used to carry and position assembly components during the assembly process of the battery device, which is beneficial to the relative positions of the positioning beams, box frames and each battery, thereby improving the assembly efficiency and ensuring the consistency and yield of the assembled components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to better understand the present invention, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and some related components may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art.

[0017] Figure 1 A flow chart of a method for assembling a battery device provided by an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a first beam of a battery device provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of a structure in which a battery is assembled using a common structural beam as a reference in an assembly method of a battery device provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of assembling a heat exchange functional beam on the other side of a battery pack in the assembly method of a battery device provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of a structure in which a battery is continuously assembled based on a heat exchange function beam in an assembly method of a battery device provided by an embodiment of the present invention;

[0022] Figure 6 A structural schematic diagram of installing a second common structural beam in the assembly method of a battery device provided by an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the structure after the first beam and the battery are installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the structure after the second beam is installed in place in the assembly method of the battery device provided by an embodiment of the present invention;

[0025] Figure 9 A schematic diagram of the structure after the front and rear frames are installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0026] Figure 10 A schematic diagram of the structure after the left and right frames are installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0027] Figure 11 A schematic diagram of the structure after the bottom plate is installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0028] Figure 12 A schematic diagram of the structure after the busbar is installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0029] Figure 13 A schematic diagram of the structure after the electrical components are installed in place in the assembly method of the battery device provided by the embodiment of the present invention;

[0030] Figure 14 A schematic diagram of the structure after the cover plate is installed in place in the assembly method of the battery device provided by an embodiment of the present invention;

[0031] Figure 15 A schematic diagram of an exploded structure of the connection between the left and right frames and the front and rear frames in a battery device provided by an embodiment of the present invention;

[0032] Figure 16 A schematic diagram of the structure of the connection between the left and right frames and the front and rear frames in the battery device provided by an embodiment of the present invention;

[0033] Figure 17 A schematic structural diagram of an assembly process of a battery and a first beam in an assembly method of a battery device provided by an embodiment of the present invention;

[0034] Figure 18 A schematic structural diagram of an assembly process of a battery and a first beam in an assembly method of a battery device provided by another embodiment of the present invention;

[0035] Figure 19 A schematic structural diagram of an assembly process of a battery and a first beam in an assembly method of a battery device provided by another embodiment of the present invention;

[0036] Figure 20 A schematic structural diagram of a positioning tool for a battery assembly provided in an embodiment of the present invention when assembling a battery and a first beam.

[0037] Reference numerals:

[0038] 1-battery; 2-beam; 21-first beam; 22-second beam; 20-adapter;

[0039] 211-ordinary structural beam; 212-heat exchange functional beam; 200-flow channel inlet and outlet;

[0040] 3-frame; 31-front and rear frames; 32-left and right frames; 310-cavity opening; 4-bottom plate;

[0041] 5-busbar; 6-electrical components; 7-cover plate; 8-sealant; 9-fastener; 10-foaming glue;

[0042] 11-carrying plate; 111-sliding groove; 12-first positioning member; 121-battery pole positioning portion;

[0043] 13-second positioning member; 131-buckle. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0045] At present, with the rise of electric vehicles, new energy battery devices used in the field of electric vehicles have developed rapidly. The battery device generally includes an external sealed box and a battery pack located in the box. The battery pack is composed of square batteries arranged, such as square lithium-ion batteries. The box of the battery device is generally an independent product, which is assembled and integrated by a third party and then supplied to the battery manufacturer. The battery manufacturer completes the battery packing operation to assemble the battery device product; therefore, the production cycle of the battery device is long, the efficiency is low, the production process is not conducive to automated production, and quality problems frequently occur in the initial stage of box integration and battery assembly, which is not conducive to improving the preparation yield of the battery device; in addition, the current battery device box is mainly assembled in the form of welding, which is easy to cause a series of quality-influencing problems such as dimensional thermal deformation deviation, low primary airtightness pass rate, decreased performance of secondary repair welding materials, difficult to remove metal residues from the frame after welding, and system insulation failure caused by welding slag / weld.

[0046] In view of this, the inventors of the present application have designed a battery device and an assembly method thereof, an assembly device, and a battery assembly positioning tool to improve the assembly process of the battery device and increase the assembly efficiency and yield of the battery device.

[0047] In a first aspect, the present application provides a method for assembling a battery device, referring to Figures 2 to 11 The battery device includes a beam 2, a box bottom plate 4, a box frame 3 and a battery 1. The beam 2, the box bottom plate 4 and the box frame 3 form a box, and the battery 1 is arranged in the box; "enclosed in a box" refers to the shape of the box, and the box is not necessarily a complete sealed structure. For example, the box frame 3 may include front and rear frames 31 and left and right frames 32, and the beam 2 may include a first beam 21 and a second beam 22; the box surrounded by the beam 2, the box bottom plate 4 and the box frame 3 refers to a box form with an upper opening and no cover. Specifically, the assembly method of the battery device provided in the present application includes the following steps:

[0048] The beam 2, the box bottom plate 4 and the box frame 3 are connected and assembled with the battery 1 according to a set sequence. In the set sequence, the box bottom plate 4 or at least part of the box frame 3 is assembled after the beam 2; for example, Figures 2 to 10As shown, the beam 2 and the box frame 3 can be first connected to the battery 1, and then the box bottom plate 4 that is not connected to the battery 1 can be further installed. Figure 11 As shown; or, first connect the beam 2, the box bottom plate 4 and the battery 1, and then further install the box frame 3 that is not connected to the battery 1.

[0049] The assembly method of the battery device provided in the present application does not require the pre-assembly of the box of the battery device, but integrates the assembly process of the battery 1 with the assembly steps of the box. First, the battery 1 is connected to the partial structure (beam 2, box frame 3 or box bottom plate 4) used to form the box, and then the remaining parts used to form the box are installed to form a complete box. After the battery 1 is assembled, the complete box is assembled. In this way, the entire assembly process is seamlessly connected and is not prone to factors that affect the yield of the battery device; for example, when assembling the battery 1, it only needs to connect the battery 1 to a part of the box structure. The battery 1 does not need to be assembled by over-pressurizing and vertically inserting into the box, and is not restricted by the box structure, which is conducive to improving assembly efficiency and yield. ; Moreover, the various parts of the box structure installed successively can be connected by non-welding methods such as bonding and / or fasteners. Compared with the method of welding the box body into a box body in advance and then assembling the battery 1, it can avoid the problems of poor box consistency caused by welding, poor assembly and insulation failure caused by welding slag and welds, etc.; and the assembly method of the present application, through the innovation of the integrated assembly method of the battery 1 to the battery device, breaks the traditional model of independent manufacturing of the box body, and highly integrates the box body manufacturing process and the system assembly process. The assembly process and process are simpler, and the entire assembly process can be seamlessly connected, which is conducive to creating a fully automated production line, improving production efficiency, realizing high-speed manufacturing, high-yield manufacturing, and helping to reduce preparation costs. In addition, if the box is surrounded by the box frame 3 and the box bottom plate 4, and the battery 1 has been assembled in the box, and then the beam 2 is assembled, the beam 2 may not be assembled into the box due to the assembly tolerance. If it is forced in, it may cause the box to deform. If the battery 1 is squeezed, it may also cause the battery 1 to deform or break, affecting the life of the battery 1. In the assembly scheme of the present application, the beam 2 is placed before the box bottom plate 4 or at least part of the box frame 3 for assembly, and the beam 2 is not assembled last, that is, before the beam 2 is assembled, a complete box is not formed. This can reduce the assembly space restriction of the box structure on the beam 2, avoid the above-mentioned assembly problems, and further improve the assembly efficiency and yield.

[0050] In some embodiments, the beam 2, the box bottom plate 4 and the box frame 3 are connected and assembled with the battery 1 in a set order, which may specifically include the following steps: Figure 1 As shown:

[0051] Step 101, such as Figures 2 to 10As shown, the beam 2 and the box frame 3 are assembled and fixed with the battery 1;

[0052] Step 102, such as Figure 11 As shown, the box bottom plate 4 is then assembled.

[0053] The assembly formed by fixing the box frame 3 and the beam 2 to the battery 1 has better stability, and the relative position between each battery 1 and the box frame is determined first, which is beneficial to the subsequent installation operation of the remaining structures (such as the box bottom plate 4, busbar), and is beneficial to improving the overall assembly yield and efficiency of the final battery device.

[0054] In some embodiments, step 101, assembling and fixing the beam 2 and the box frame 3 with the battery 1, specifically includes: Figure 10 and Figure 11 As shown, the side where the pole of the battery 1 is located faces the ground to be assembled and fixed with the box frame 3 and the beam 2. Exemplarily, the battery 1 can be a lithium-ion square battery 1, specifically a hexahedron, and the side where the pole of the battery 1 is located is away from the box bottom plate 4 and faces the cover plate of the battery device, which is used to arrange the bus 5 and connect with the wiring harness board assembly through the bus 5.

[0055] Further, step 102, assembling the box bottom plate 4, may include the following implementations:

[0056] like Figure 10 and Figure 11 As shown, the box bottom plate 4 is bonded and fixed to the side of the battery 1 facing away from the pole.

[0057] Furthermore, the battery assembly method may further include the following steps:

[0058] Step 103, as Figure 11 and Figure 12 As shown, the module with the box bottom plate 4 assembled is turned over as a whole, and the busbar 5 is assembled on the side of the battery 1 where the pole is provided.

[0059] In this embodiment, the side where the pole of the battery 1 is located faces the ground to be assembled with the box frame, that is, the battery 1 and the box frame are connected and assembled inverted. In this way, after the battery 1 and the box frame are connected and assembled, there is no need to move the assembly composed of the battery 1 and the box frame, and the box bottom plate 4 can be directly assembled, and then the assembly is turned over to assemble the bus 5, the wiring harness board assembly and the box cover plate 7 and other structures; because the battery 1 and the box frame are inverted when assembling the box bottom plate 4, the assembly operation of the box bottom plate 4 is simple, for example, it is very convenient to install a locking piece on one side of the box bottom plate 4.

[0060] In some embodiments, step 101, assembling and fixing the beam 2 and the box frame 3 with the battery 1, specifically includes:

[0061] A positioning tool is provided, and the box frame 3, the beam 2 and the battery 1 are assembled and connected on the positioning tool. The positioning tool is provided with a positioning structure, and the position of the box frame 3, and / or the beam 2, and / or the battery 1 is positioned by the positioning structure.

[0062] In this embodiment, the positioning tool can both carry the assembly components and position the assembly components. For example, the positioning tool can be used to locate the relative positions of the beam 2, the box frame 3 and each battery 1, thereby improving the assembly efficiency and ensuring the consistency and yield of the assembled components.

[0063] For example, Figures 2 to 10 As shown, firstly, the box frame and the battery 1 are assembled on the positioning tool; further, as Figure 10 and Figure 11 As shown, the assembly step of the box bottom plate 4 can also be performed on the positioning fixture, that is, after the box frame and the battery 1 are assembled and connected on the positioning fixture, there is no need to move or flip the box frame and the battery 1, and the box bottom plate 4 is directly bonded and fixed to the side of the battery 1 away from the pole, so that the assembly of the box is completed. Figures 12 to 14 As shown, the box can then be turned over so that the open side of the box faces upward, so as to facilitate further assembly of structures such as the busbar 5, the wiring harness board assembly, the electrical components 6 and the cover plate 7.

[0064] In some embodiments, after the beam 2, the box frame 3 and the battery 1 are assembled and fixed, in the direction perpendicular to the large surface of the battery, there is a gap between at least one large surface of each battery 1 and the adjacent structure. The battery 1 is a hexahedron, and the large surface of the battery is the two opposite surfaces with the largest area. In this way, the battery can be prevented from being squeezed, and the further mutual squeezing caused by the expansion and deformation of the battery during operation can be alleviated, thereby improving the safety performance of the battery. Exemplarily, there can be a gap between two adjacent large surfaces of the battery, or there can be a gap between the large surface of the battery and the adjacent separator, or there can be a gap between the large surface of the battery and the adjacent box frame.

[0065] At present, the conventional assembly process is to assemble the box body in advance and then put the battery into the box. Generally, it is necessary to use a clamping tool to pressurize the battery pack in a direction perpendicular to the large surface of the battery and then put the over-pressurized battery pack into different chambers of the box body. During the assembly process and after assembly, each battery will be subjected to a certain extrusion force in the direction perpendicular to the large surface of the battery, and the battery is prone to expansion and deformation during the charging and discharging process, especially in the direction perpendicular to the large surface of the battery. Therefore, the battery device prepared by the conventional method is easy to produce defects or even safety problems during use due to large changes in force and deformation. The assembly process of this embodiment integrates the assembly process of the battery with the assembly steps of the box body, and there is no need to over-pressurize the battery pack into the box. In addition, the assembly process can use a positioning tool to ensure the relative position of each battery pack and the box frame, thereby ensuring that each battery is not subjected to extrusion force in the direction perpendicular to the large surface of the battery. Therefore, the battery device assembly process provided by this embodiment can reduce or avoid the assembly process and the extrusion force of each battery in the direction perpendicular to the large surface of the battery after assembly, thereby increasing the service life of the battery device and reducing the probability of safety problems in the battery device.

[0066] Exemplarily, step 101, assembling and fixing the beam 2, the box frame 3 and the battery 1, may specifically include:

[0067] A separator is provided on one large surface of at least part of the batteries 1, and then the batteries 1 are assembled in sequence in a direction perpendicular to the large surface of the batteries, with a gap between the later assembled batteries 1 and the adjacent previously assembled batteries 1. In this way, the batteries 1 can be arranged in a direction perpendicular to the large surface of the batteries, and there is a certain gap between each battery 1 and its adjacent batteries 1, or between its adjacent separators. For example, a separator is provided on one large surface of each battery 1, and there is a separator between any two adjacent batteries 1. One side of the separator is bonded to the large surface of one battery, and the other side is provided with a gap between the other large surface of the battery, so there is no extrusion between adjacent batteries 1, and the above-mentioned gap and separator can provide a buffer for the expansion and deformation of the battery when the battery 1 is working, avoiding poor extrusion or other safety problems caused by large deformation of the battery 1.

[0068] In some embodiments, step 101, assembling and fixing the beam 2, the box frame 3 and the battery 1, may include the following steps:

[0069] Step 201, such as Figures 2 to 8 As shown, firstly, the battery 1 is bonded and fixed to the beam 2;

[0070] Step 202, such as Figure 9 and Figure 10 As shown, the box frame 3 is then connected to the beam 2 to form a box frame.

[0071] By adopting the assembly method in this embodiment, each battery 1 can be pre-fixed by the beam 2, which facilitates the subsequent installation of other structures such as the frame 3 and the box bottom plate 4.

[0072] In some embodiments, step 201, bonding and fixing the battery 1 to the beam 2, may include:

[0073] like Figures 2 to 7 As shown, the first side surface of the battery 1 is bonded and fixed to the first beam 21 , and the first side surface of the battery 1 is perpendicular to the large surface of the battery.

[0074] In the prepared battery device, the batteries 1 are accommodated in the cavity of the box in the form of groups, and the batteries 1 in the battery group are arranged in a direction perpendicular to the large surface of the battery. By bonding and fixing the first side surface of each battery 1 to the first beam 21, the batteries 1 can be arranged along the extension direction of the first beam 21 with the first beam 21 as a reference to form a battery group, and the batteries 1 in each battery group can be connected and fixed to the adjacent first beams 21, thereby facilitating the subsequent installation of other structures and improving the overall stability of the battery device.

[0075] Specifically, the batteries 1 in the battery pack may be adhered to the first beam 21 in sequence, or the batteries 1 may be arranged into groups and then adhered to the first beam 21 in unison, depending on actual needs.

[0076] For example, Figures 2 to 7 As shown, the first side of the battery 1 is bonded and fixed to the first beam 21, which may specifically include the following implementations: the first beam 21 includes a common structural beam 211 and a heat exchange functional beam 212, the common structural beam 211 is only used as a structural frame, and the heat exchange functional beam 212 is configured as a liquid cooling plate, which, in addition to being used as a structural frame, can also flow a heat exchange medium inside for heat exchange of the battery 1. In a direction perpendicular to the first beam 21, the common structural beam 211 and the heat exchange functional beam 212 are alternately arranged; the battery 1 includes two opposite first side surfaces, one of the first side surfaces is bonded and fixed to the common structural beam 211, and the other first side surface is bonded and fixed to the heat exchange functional beam 212.

[0077] Since the common structural beam 211 has a large structural strength and does not have a heat exchange flow channel inside, there is no safety risk such as liquid leakage, so it is beneficial to strengthen the strength and stability of the box frame. For example, the common structural beam 211 can be connected to the box bottom plate 4 or the frame 3 through fasteners; and the heat exchange function beam 212 can perform heat exchange on the battery 1 adjacent to it, thereby improving the working efficiency and yield of the battery 1; in this embodiment, by arranging the common structural beam 211 on one side of each battery pack and the heat exchange function beam 212 on the other side, the structural strength and working performance of the battery device can be improved at the same time, and the beneficial effect is significant. Of course, for the battery pack located at the end in the direction perpendicular to the first beam 21, one of its first side surfaces is bonded to the first beam 21, and the other first side surface may not be bonded to the first beam 21, but directly contacts the box frame 3, that is, the battery pack located at the end in the direction perpendicular to the first beam 21, only one side is bonded to the common structural beam 211 or the heat exchange function beam 212, preferably, one side of the battery pack at the end is bonded to the heat exchange function beam 212.

[0078] Further, step 201, bonding and fixing the battery 1 to the beam 2, further includes: Figure 8 As shown, after the first side surface of the battery 1 is bonded and fixed to the first beam 21 , the second beam 22 is assembled. The second beam 22 is perpendicular to the first beam 21 , and the second beam 22 and the first beam 21 are snap-fitted.

[0079] Specifically, the second beam 22 is perpendicular to the arrangement direction of the batteries 1 in the battery pack and parallel to the large surface of the battery 1. The second beam 22 crosses and perpendicularly with the first beam 21 to separate and form multiple areas, so that different battery packs are separated in different areas.

[0080] In some embodiments, step 202, the step of connecting the box frame 3 and the beam 2 to form a box frame, specifically includes the following implementations:

[0081] like Figure 8 , Figure 9 and Figure 10 As shown, the front and rear frames 31 are assembled first, and then the left and right frames 32 are assembled. The front and rear frames 31 are respectively located at two ends of the first beam 21 , and the left and right frames 32 extend in the same direction as the first beam 21 .

[0082] Exemplarily, the surfaces of the left and right frames 32 facing the inner side of the box body are bonded to the end surfaces of the front and rear frames 31 .

[0083] The left and right frames 32 are used to cover the end surfaces of the front and rear frames 31, and the ends of the front and rear frames 31 can be sealed; if the left and right frames 32 are installed first, the front and rear frames 31 need to be stuffed into the spacing limited by the left and right frames 32, which is not easy to assemble. In addition, since sealant is provided between the ends of the front and rear frames 31 and the left and right frames 32, the glue is easily scraped off when the front and rear frames are installed later. Installing the front and rear frames 31 first and then the left and right frames 32 can avoid glue scraping and is conducive to the operation of squeezing out the overflow glue in a direction perpendicular to the contact surface of the two, which is beneficial to the bonding strength and sealing yield of the two.

[0084] Exemplarily, step 202, connecting the box frame 3 and the beam 2 to form a box frame, specifically includes:

[0085] like Figure 15 As shown, glue grooves are provided at the ends of the front and rear frames 31, and sealant 8 is arranged in the glue grooves; this facilitates the accommodation of the sealant 8 and limits the bonding area of ​​the sealant 8; for example, a cavity is provided in the front and rear frames 31 for weight reduction, and a cavity opening 310 is provided at the ends of the front and rear frames 31, and the glue grooves can be arranged around the cavity opening 310, so that the cavity opening 310 of the front and rear frames 31 can be sealed by the sealant 8 to improve the airtightness of the battery device.

[0086] Furthermore, when installing the left and right frames 32, the surfaces of the left and right frames 32 facing the inner side of the box body are bonded to the end faces of the front and rear frames 31 by means of a sealant 8, and are locked by means of fasteners 9. In this way, the fasteners 9 can further ensure the connection strength between the front and rear frames 31 and the left and right side beams 2, thereby ensuring the structural strength of the entire battery device.

[0087] Exemplarily, the frame 3 is connected to the beam 2 to form a box frame, and further includes:

[0088] like Figure 16 As shown, the end faces of the left and right frames 32 are provided with cavity openings, and the cavity openings at the end faces of the left and right frames 32 are sealed by glue to improve the airtightness of the battery device and avoid the battery device from generating wind noise when used in a driving environment.

[0089] For example, the foam glue 10 may be used to seal the cavity openings on the end surfaces of the left and right frames 32 .

[0090] Exemplarily, the steps of assembling the front and rear frames 31 may specifically include the following:

[0091] like Figure 2 and Figure 9 As shown, adapters 20 are provided at both ends of the first beam 21 , and the front and rear frames 31 are provided with grooves for plugging with the adapters 20 . The adapters 20 at both ends of the first beam 21 are plugged into the grooves of the front and rear frames 31 .

[0092] Exemplarily, the adapter 20 can be plugged into the main body of the first beam 21 and locked by a locking member; for example, the adapter 20 can be T-shaped, wherein a vertical structure of the T-shape is plugged into the cavity of the main body of the first beam 21, and a horizontal structure of the T-shape is used to be plugged into the grooves of the front and rear frames 31.

[0093] For example, Figure 7 and Figure 9 As shown, the first beam 21 includes a common structural beam 211 and a heat exchange functional beam 212. Adapters 20 are provided at both ends of the common structural beam 211 to connect with the front and rear frames 31; flow channel inlets and outlets 200 are provided at both ends of the heat exchange functional beam 212 to be connected with the heat exchange medium pipeline.

[0094] It should be noted that in the present application, the front and rear frames 31 include two side frames located at the front and rear ends of the cavity frame and arranged oppositely. Similarly, the left and right frames 32 include two side frames located at the left and right ends of the cavity frame and arranged oppositely.

[0095] In some embodiments, step 201, bonding and fixing the battery 1 to the beam 2, may specifically include the following implementations:

[0096] like Figure 17 As shown, firstly, the beams 2 are arranged on the positioning fixture, and then the battery 1 is installed in the area surrounded by the beams 2 and the battery 1 is bonded to the adjacent beams 2. For example, firstly, the first beams 21 and the second beams 22 are arranged to enclose a plurality of areas, and then the battery 1 is installed in each area. In this way, it is convenient to quickly position, which is conducive to further improving work efficiency.

[0097] In some other embodiments, step 201, bonding and fixing the battery 1 to the beam 2, may specifically include the following implementations:

[0098] like Figure 18 As shown, firstly, the battery 1 is arranged on the positioning fixture, and then the beam 2 is installed between the battery 1 and bonded and fixed to the adjacent battery 1. For example, firstly, multiple groups of batteries 1 are arranged on the positioning fixture, and then the first beam 21 and the second beam 22 are arranged between the battery groups to separate different battery groups. In this way, the installation of the battery group is convenient, which is conducive to ensuring that each battery 1 is not squeezed in the vertical large surface direction. In addition, usually the opposite sides of the beam will be coated with glue to bond with different battery groups. If the battery groups on both sides of the beam are installed one after another, the subsequent battery group may be poorly bonded because the glue layer has been solidified; by adopting the assembly method of this embodiment, both sides of the beam can be bonded to the battery groups on both sides at the same time, thereby avoiding the above problems.

[0099] In some other embodiments, step 201, bonding and fixing the battery 1 to the beam 2, may specifically include the following implementations:

[0100] like Figure 19 As shown, the batteries 1 and beams 2 are alternately arranged on the positioning fixture, and the adjacent batteries 1 are bonded and fixed to the beams 2. In this way, the installation operation of the batteries 1 and the beams 2 is very convenient, and it is beneficial to improve the bonding yield between the batteries 1 and the beams 2 and strengthen the overall structural strength.

[0101] For example, the first beam 21 is first arranged on the positioning tool, and then the battery 1 adjacent to the first beam 21 is arranged based on the first beam 21, and so on, the first beam 21 and the battery 1 are alternately arranged in the horizontal direction until the preset number of batteries 1 is reached, and then the second beam 22 can be arranged to separate different battery groups in the vertical direction.

[0102] Alternatively, a row of batteries 1 is first arranged on the positioning fixture, and the row of batteries 1 can be a battery group or can include two or more battery groups. Then, the first beam 21 adjacent to the row of batteries 1 is arranged based on the row of batteries 1. Similarly, the row of batteries 1 and the first beam 21 are alternately arranged in the horizontal direction until the preset number of batteries 1 is reached. Then, the second beam 22 can be arranged to separate each row of batteries 1 into battery groups.

[0103] Of course, the assembly method of the battery device provided in the embodiment of the present application and its specific implementation are not limited to the examples in the above embodiments. For example, the battery 1 may be first bonded to the box bottom plate 4, and then the box frame structure such as the beam 2 and the box frame 3 may be assembled. At this time, the box bottom plate 4 is preferably provided with a positioning portion for each battery 1, and the battery 1 is preferably placed upright and bonded to the box bottom plate 4; or, the battery 1 may be first assembled and fixed with the beam 2 and part of the box frame 3 (such as the front and rear frames 301), and then the box bottom plate 4 is assembled, and finally the other part of the box frame 3 (such as the left and right frames 302) is assembled. The selection of the specific assembly method of the present application can be determined according to the actual operation requirements.

[0104] In a second aspect, the present application further provides a battery device, which is prepared by using any of the above-mentioned battery device assembly methods. Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the battery device includes a box body assembled by a beam 2, a box body frame 3 and a box body bottom plate 4, and a battery 1 located in the box body.

[0105] Exemplarily, the box frame 3 and the box bottom plate 4 , as well as the box frame 3 and the beam 2 are connected in a non-welding manner.

[0106] Specifically, the battery device provided in the present application is used to form different partial structures of the box body (beam 2, box frame 3 or box bottom plate 4) which are directly integrated and assembled with the battery 1. Therefore, the entire assembly process is seamlessly connected, the assembly process and process are simple, the degree of automation is high, and it is not easy to produce factors that affect the product yield of the battery device, which can improve the consistency and yield of the battery device assembly; and when assembling the battery 1, it is only necessary to connect the battery 1 to part of the box structure. The battery 1 does not need to be assembled by over-pressurizing and vertically inserting into the box body, and is not restricted by the box body structure, which is conducive to improving the assembly efficiency and yield; and the various parts of the box body structures installed successively are connected by non-welding forms such as bonding and / or fasteners. Compared with the method of welding the box body into a box body in advance and then assembling the battery 1, it can avoid problems such as poor box consistency caused by welding, poor assembly and insulation failure caused by welding slag and welds, etc., which can further improve the yield of the battery device.

[0107] In a third aspect, based on the battery assembly method provided in the present application, the present application further provides a battery assembly device, the assembly device is used to perform the steps in any of the battery assembly methods described above; the assembly device comprises:

[0108] A first assembly mechanism is configured to assemble and fix the beam and the battery;

[0109] The second assembly mechanism is configured to assemble the box bottom plate and / or at least a portion of the box frame on the assembly formed by assembling the beam and the battery.

[0110] Specifically, the battery device assembly equipment provided in this embodiment is used to execute the processes in the above-mentioned battery device assembly method, which can realize the automation of the full-process assembly operation of the entire battery device, effectively improve the production efficiency of the battery device, and improve the assembly yield of the battery device.

[0111] For example, the first assembly mechanism can be configured to sequentially bond and fix the beam and the box frame to the battery on the positioning tool; the second assembly mechanism can be configured to install the box bottom plate on the side of the battery away from the pole. Alternatively, the first assembly mechanism can be configured to bond and fix the beam and part of the box frame to the battery on the positioning tool; the second assembly mechanism can be configured to install the box bottom plate and another part of the box frame. Of course, in the present application, the specific operation process and assembly process performed by the first assembly mechanism and the second assembly mechanism can also include many implementation methods, not limited to the above embodiments, and can be determined according to actual conditions.

[0112] In addition, the assembly equipment of the battery device provided in the present application is not limited to the above structure. For example, the assembly equipment may also include a third assembly mechanism for further performing operations such as assembling the busbar and the cover after the box and the battery are installed.

[0113] Specifically, the battery device and the battery device assembly equipment provided in the present application are based on the same inventive concept as the battery device assembly method provided in the present application, and have the same or corresponding embodiments and beneficial effects, which will not be described in detail in the present application.

[0114] In a fourth aspect, based on the battery assembly method provided in the present application, the present application provides a battery assembly positioning tool, which is used to position at least part of the components constituting the battery assembly during the battery assembly process; Figure 20 As shown, the battery device includes a beam 2, a box bottom plate, a box frame and a battery 1. The beam 2, the box bottom plate and the box frame form a box, and the battery 1 is arranged in the box. The battery assembly positioning tool includes a bearing plate 11 and a positioning structure located on the bearing plate 11. The bearing plate 11 is used to support at least one of the box frame, the beam 2 and the battery 1, and the positioning structure is used to position at least one of the box frame, the beam 2 and the battery 1.

[0115] The battery assembly positioning tool provided in this embodiment can be used to carry and position assembly components such as beams 2, box frames and / or batteries 1 during the assembly process of the battery device, which is beneficial to positioning the relative positions of beams 2, box frames and each battery 1, thereby improving assembly efficiency and ensuring the consistency and yield of the assembled components.

[0116] In some embodiments, Figure 20 As shown, the positioning structure includes a first positioning member 12, and the first positioning member 12 is used to carry and position the battery 1. The battery 1 is an important part of the battery device. The battery device generally includes multiple groups of batteries 1, and each group of batteries 1 includes multiple batteries 1. Positioning each battery 1 in the battery device is the key to improving the assembly efficiency and yield of the battery device; in this embodiment, by providing the first positioning member 12, it is beneficial to fix the relative positions between the batteries 1 and the battery 1 and between the battery 1 and the box frame and beam, thereby improving the assembly efficiency and yield.

[0117] Exemplarily, the first positioning member 12 includes a battery pole positioning portion 121, and the battery pole positioning portion 121 is used to position the pole of the battery 1. For example, the battery pole is protruding relative to the surface of the battery 1, and the battery pole positioning portion 121 can be a groove matching the protruding portion of the pole, and each battery 1 can be pre-positioned by inserting the protruding portion of the pole of each battery 1 into the corresponding groove.

[0118] Specifically, during the assembly process of the battery device, the side of the battery 1 with the pole column is placed downward on the first positioning member 12. The battery 1, the beam 2, and the box body frame can be assembled in an inverted form. In this way, after the battery 1, the beam 2, and the box body frame are assembled, the box body bottom plate can be directly bonded and fixed to the side of the battery 1 facing away from the pole column. Since the battery 1, the beam 2, and the box body frame are all inverted at this time, the box body bottom plate is directly installed above these structures, which is beneficial to the installation operation. For example, it is convenient to use locking members to lock the box body bottom plate and the beam 2.

[0119] In some embodiments, such as Figure 20 shown, the beam 2 includes a first beam 21, and the batteries 1 are arranged in groups along the extension direction of the first beam 21; the positioning structure includes at least one first positioning member 12, and each first positioning member 12 is used to carry a battery group and position the batteries 1 in the battery group. In this way, each first positioning member 12 can determine the relative positions of the batteries 1 in a battery group. After that, the relative positions of the first positioning members 12 are fixed, and the positioning of all the batteries 1 in the entire battery device can be completed. It should be noted that in the embodiment of the battery assembly positioning tooling, the battery group refers to a battery group formed by a row of batteries 1 arranged along the extension direction of the first beam 21, rather than the battery group formed by dividing the batteries in the battery device box in the conventional technology.

[0120] Exemplarily, the positioning structure includes at least two first positioning members 12 arranged along the first direction x, and the at least two first positioning members 12 are spaced apart from each other, and the interval between adjacent first positioning members 12 allows the first beam 21 to be placed.

[0121] Exemplarily, the first beam 21 can include a common structural beam and a heat exchange functional beam, and the common structural beam and the heat exchange functional beam are arranged alternately. The specific arrangement method can refer to the description of the relevant part of the battery device assembly method embodiment, and will not be elaborated here.

[0122] Specifically, the first beam 21 and the battery groups are arranged alternately, and adjacent battery groups are separated by the first beam 21. During the assembly process of the battery device, the battery groups can be first positioned by the first positioning members 12, and then the first beam 21 is inserted between adjacent first positioning members 12 so that the first beam 21 is located between adjacent battery groups, thereby realizing the assembly positioning of the battery group and the first beam 21.

[0123] Exemplarily, the positioning structure also includes a first driving mechanism, which is used to drive the first positioning member 12 to slide along the first direction x. Specifically, the first direction x is perpendicular to the extension direction of the first beam 21. By driving the first positioning member 12 to slide along the first direction x, the spacing between adjacent first positioning members 12 or the distance between adjacent first beams 21 and the battery pack can be adjusted, which facilitates the assembly operation and helps to improve the assembly efficiency and yield. For example, when installing the battery pack and the first beam 21, in order to avoid the glue layer between the battery pack and the first beam 21 from being scratched, the adjacent battery pack and the first beam 21 can be first placed on the carrier plate 11 with a certain gap reserved between them, and then the first positioning member 12 under the battery pack is driven to move to adjust the distance between the battery pack and the first beam 21, so as to complete the bonding operation between the battery pack and the first beam 21.

[0124] Exemplarily, the first driving mechanism is a cylinder, which is arranged on the side of the carrier plate 11 away from the first positioning member 12 and is in driving connection with the first positioning member 12. That is, the cylinder is located below the carrier plate 11, so that the space above the carrier plate 11 can be saved, which is conducive to assembly operations above the carrier plate 11.

[0125] In some embodiments, Figure 20 As shown, the positioning structure further includes a second positioning member 13, and the second positioning member 13 is used to engage and position the two ends of the extension direction of the first beam 21. For example, the second positioning member 13 may include a pair of buckles 131, and the pair of buckles 131 are symmetrically arranged to respectively engage with the two ends of the first beam 21. Positioning the first beam 21 by the second positioning member 13 is conducive to further improving the assembly efficiency and yield of the battery device.

[0126] Exemplarily, the positioning structure includes at least two second positioning members 13, wherein at least part of the second positioning members 13 can be slidably assembled on the carrier plate 11 along the first direction x, for example, the carrier plate 11 is provided with a pair of slide grooves 111 that cooperate with a pair of buckles 131, and the pair of buckles 131 can slide along the pair of slide grooves 111. The second positioning members 13 can slide, which can facilitate the adjustment of the distance between the battery pack and the first beam 21, and is conducive to the assembly operation between the battery pack and the first beam 21.

[0127] For example, the second positioning members 13 for fixing the middle first beam 21 are fixed relative to the carrier plate 11, and the other second positioning members 13 are slidable relative to the carrier plate 11. In this way, when assembling the battery pack and the first beam 21, the middle first beam 21 can be used as a positioning reference to drive the battery pack to move from both sides to the middle first beam 21, thereby achieving extrusion bonding between the first beam 21 and the battery pack, so that the first beam 21 and the battery pack are assembled in place.

[0128] In a specific embodiment, the method of assembling a battery device using the battery assembly positioning tool of the present application is as follows: Figure 20 As shown, the battery 1 is placed with the pole side facing downward on the first positioning member 12 to form a battery pack, and the first beam 21 coated with glue is inserted into the gap between the battery packs. The first beam 21 in the middle is fixed by the second positioning member 13, and the position is fixed. The two first positioning members 12 adjacent to the left and right and the battery packs carried by them are driven by the cylinder to approach the middle first beam 21, so that the battery pack is bonded to the first beam 21, and then the two first positioning members 12 on the outside and the battery packs carried by them are moved toward the direction close to the middle first beam 21. The movement of the two first positioning members 12 can push the first beam 21 and the second positioning member 13 inside thereof to move inward until the battery pack inside is squeezed, thereby making the battery pack relatively outside bonded to the adjacent first beam 21; and by analogy, the battery packs are moved sequentially from inside to outside, first moving the battery pack inside, and then moving the battery packs relatively close to the outside in turn, and each battery pack is moved inward to achieve bonding between each battery pack and the adjacent first beam 21, so that the battery packs of the battery device and the first beam 21 are assembled in place.

[0129] Specifically, compared with the assembly method of installing the battery packs on both sides of the first beam 21 one after another, the assembly method of this embodiment can avoid premature curing of the glue layer on the side of the later installed battery pack due to the installation time difference between the two battery packs, and can avoid failure of the connection between the battery pack and the first beam 21, thereby improving the assembly yield; and the assembly method of this embodiment can adopt a method of simultaneous operation of the cylinders, which has higher assembly efficiency and better connection yield.

[0130] Below, a specific implementation of the assembly method of the battery device of the present application is described by way of example. The assembly method may specifically include the following steps:

[0131] Step 301, such as Figures 2 to 7 As shown, the first beam 21 is arranged on the positioning fixture, and then the batteries 1 adjacent to the first beam 21 are arranged based on the first beam 21, and the first beam 21 and the batteries 1 are alternately arranged in the horizontal direction in the same manner until the preset number of batteries 1 is reached;

[0132] Step 302, such as Figure 8 As shown, a second beam 22 is arranged, and the second beam 22 is perpendicularly crossed with the first beam 21 and is engaged and connected to separate different battery groups in the longitudinal direction;

[0133] Step 303, such as Figure 8 and Figure 9 As shown, the front and rear frames 31 are installed, and the front and rear frames 31 are connected to both ends of the first beam 21;

[0134] Step 304, such asFigure 9 and Figure 10 As shown, the left and right frames 32 are installed, and the left and right frames 32 are bonded to the two ends of the front and rear frames 31 and locked by bolts;

[0135] Step 305, such as Figure 10 and Figure 11 As shown, the box bottom plate 4 is installed, the box bottom plate 4 is bonded to the bottom of the battery 1, and then the bottom plate 4 is locked to the box frame by bolts to form a box structure;

[0136] Step 306, such as Figure 11 and Figure 12 As shown, the assembled module is turned over so that the bottom plate 4 faces downward and the opening of the box faces upward, while exposing the pole above the battery 1, and the busbar 5 is assembled above the battery 1;

[0137] Step 307, such as Figure 13 As shown, the electrical device 6 is arranged in the space surrounded by the front and rear frames 31;

[0138] Step 308, such as Figure 14 As shown, the cover plate 7 is assembled and sealed to the lower box body to form a battery device.

[0139] Specifically, the battery device provided in this embodiment may be a battery pack. The bottom plate of the battery device may include a liquid cooling plate and a bottom guard plate. The battery pack is glued and fixed to the box frame, which can reduce the pressure of the battery pack on the liquid cooling plate and improve the safety and reliability of the battery pack.

[0140] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the inventions disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0141] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A method for assembling a battery device, It is characterized in that The battery device comprises a beam, a box bottom plate, a box frame and a battery, wherein the beam, the box bottom plate and the box frame form a box, and the battery is arranged in the box; the assembly method comprises the following steps: Connecting and assembling the beam, the box bottom plate and the box frame to the batteries respectively in a set sequence, wherein the box bottom plate or at least part of the box frame is assembled after the beam; The step of connecting and assembling the beam, the box bottom plate and the box frame with the batteries in a set order includes: First, assemble and fix the beams, the box frame and the battery, and then assemble the box bottom plate; The step of fixing the beam and the box frame to the battery comprises: First, the battery is bonded and fixed to the beam, and then the box frame is connected to the beam to form a box frame; The step of bonding and fixing the battery to the beam specifically includes: arranging the battery and the first beam alternately, and bonding and fixing adjacent batteries to the first beam.

2. The method for assembling a battery device according to claim 1, It is characterized in that The step of fixing the beam and the box frame to the battery comprises: after fixing the beam and the box frame to the battery, a gap is formed between at least one side of the large surface of each battery and an adjacent structure in a direction perpendicular to the large surface of the battery.

3. The method for assembling a battery device according to claim 2, It is characterized in that The step of fixing the beam and the box frame to the battery comprises: A separator is arranged on one large surface of at least part of the batteries, and then the batteries are assembled in sequence in a direction perpendicular to the large surface of the batteries, with a gap between the later assembled battery and the adjacent earlier assembled battery.

4. The method for assembling a battery device according to claim 1, It is characterized in that The step of bonding and fixing the battery to the beam comprises: The first side surface of the battery is bonded and fixed to the first beam, and the first side surface of the battery is perpendicular to the large surface of the battery.

5. The method for assembling a battery device according to claim 4, It is characterized in that The step of bonding and fixing the first side surface of the battery to the first beam further comprises: The first beam includes a common structural beam and a heat exchange functional beam, the heat exchange functional beam is configured as a heat exchange plate, and the common structural beam and the heat exchange functional beam are alternately arranged along a direction perpendicular to the large surface of the first beam; the battery includes two opposite first side surfaces, one first side surface is bonded and fixed to the common structural beam, and the other first side surface is bonded and fixed to the heat exchange functional beam.

6. The method for assembling a battery device according to claim 4, It is characterized in that The step of bonding and fixing the battery to the beam further comprises: After the first side surface of the battery is bonded and fixed to the first beam, the second beam is assembled, the second beam is perpendicular to the first beam, and the second beam is clip-fitted with the first beam.

7. The method for assembling a battery device according to claim 4, It is characterized in that The method of connecting the box frame and the beam to form a box frame includes: The front and rear frames are assembled first, and then the left and right frames are assembled. The front and rear frames are respectively located at two ends of the first beam, and the left and right frames have the same extension direction as the first beam.

8. The method for assembling a battery device according to claim 7, It is characterized in that First assemble the front and rear frames, then the left and right frames, including: The surfaces of the left and right frames facing the inner side of the box body are bonded to the end surfaces of the front and rear frames.

9. The method for assembling a battery device as claimed in claim 8, It is characterized in that The method of connecting the box frame and the beam to form a box frame includes: The ends of the front and rear frames are provided with glue grooves, and sealant is arranged in the glue grooves at the ends of the front and rear frames; When installing the left and right frames, the surfaces of the left and right frames facing the inner side of the box body are bonded to the end faces of the front and rear frames by means of the sealant and then locked by means of fasteners.

10. The method for assembling a battery device according to claim 7, It is characterized in that The assembling of the front and rear frames specifically includes: The two ends of the first beam are provided with adapters, and the front and rear frames are provided with grooves for plugging and matching with the adapters. The adapters at the two ends of the first beam are plugged into the grooves of the front and rear frames.

11. The method for assembling a battery device according to claim 8, It is characterized in that The method of connecting the box frame and the beam to form a box frame also includes: The end faces of the left and right frames are provided with cavity openings, and the cavity openings at the end faces of the left and right frames are sealed by glue.

12. A method for assembling a battery device according to any one of claims 1 to 11, It is characterized in that The step of fixing the beam and the box frame to the battery comprises: The side of the battery where the pole is located is facing the ground to be assembled and fixed with the box frame and beam.

13. The method for assembling a battery device according to claim 12, It is characterized in that The step of fixing the beam and the box frame to the battery comprises: A positioning tool is provided, and the box frame, the beam and the battery are assembled and connected on the positioning tool. The positioning tool is provided with a positioning structure, and the position of the box frame, and / or the beam, and / or the battery is positioned by the positioning structure.

14. The method for assembling a battery device according to claim 13, It is characterized in that The step of bonding and fixing the battery to the beam comprises: First, the beams are arranged on the positioning fixture, and then the battery is installed in the area surrounded by the beams and the battery is bonded to the adjacent beams.

15. The method for assembling a battery device according to claim 13, It is characterized in that The step of bonding and fixing the battery to the beam comprises: First, the batteries are arranged on the positioning fixture, and then the beams are installed between the batteries and bonded to the adjacent batteries.

16. The method for assembling a battery device according to claim 13, It is characterized in that The step of bonding and fixing the battery to the beam comprises: The batteries and beams are alternately arranged on the positioning fixture, and the adjacent batteries and beams are bonded and fixed.

17. A method for assembling a battery device according to any one of claims 13 to 16, It is characterized in that The assembly box bottom plate specifically comprises: Adhere and fix the bottom plate of the box to the side of the battery away from the pole; After assembling the bottom plate of the cabinet, the following steps are also included: Turn the assembled module over as a whole and install the busbar on the side where the battery has the poles.

18. A battery device, It is characterized in that The battery device is prepared by the assembly method of the battery device according to any one of claims 1 to 17; the battery device comprises a box body assembled by a beam, a box body frame and a box body bottom plate, and a battery located in the box body.

19. The battery device according to claim 18, It is characterized in that The box frame and the box bottom plate, as well as the box frame and the beam are connected in a non-welding manner.

20. An assembly device for a battery device, It is characterized in that The battery device assembly equipment is used to perform the steps in the battery device assembly method according to any one of claims 1 to 17; the assembly equipment comprises: A first assembly mechanism is configured to assemble and fix the beam and the battery; The second assembly mechanism is configured to assemble the box bottom plate and / or at least a portion of the box frame on the assembly formed by assembling the beam and the battery.

21. A battery assembly positioning tool, It is characterized in that The battery assembly positioning tool is used to position at least part of the components constituting the battery device during the process of assembling the battery device using the assembly method according to any one of claims 1 to 17; the battery device comprises a beam, a box bottom plate, a box frame and a battery, the beam, the box bottom plate and the box frame form a box, and the battery is arranged in the box; The battery assembly positioning tool comprises a bearing plate and a positioning structure located on the bearing plate, wherein the bearing plate is used to bear at least one of the box frame, the beam and the battery, and the positioning structure is used to position at least one of the box frame, the beam and the battery; The positioning structure includes a first positioning member, which is used to carry and position the battery during the process of assembling the battery and the beam; The beam includes a first beam, and the batteries are arranged in groups along the extension direction of the first beam; the positioning structure also includes a second positioning member, and the second positioning member is used to engage and position the two ends of the first beam in the extension direction during the process of assembling the batteries and the beam.

22. The battery assembly positioning tool as claimed in claim 21, It is characterized in that The first positioning member includes a battery pole positioning portion, and the battery pole positioning portion is used to position the battery pole.

23. The battery assembly positioning tool as claimed in claim 21 or 22, It is characterized in that The positioning structure includes at least one first positioning member, and each of the first positioning members is used to carry a battery pack and position the batteries in the battery pack.

24. The battery assembly positioning tool as claimed in claim 23, It is characterized in that The positioning structure comprises at least two first positioning members arranged along a first direction, wherein the at least two first positioning members are spaced apart from each other, and the space between adjacent first positioning members allows the first beam to be placed.

25. The battery assembly positioning tool as claimed in claim 24, It is characterized in that The positioning structure further includes a first driving mechanism, and the first driving mechanism is used to drive the first positioning member to slide along the first direction.

26. The battery assembly positioning tool as claimed in claim 25, It is characterized in that The first driving mechanism is a cylinder, which is arranged on a side of the supporting plate away from the first positioning member and is drivingly connected to the first positioning member.

27. The battery assembly positioning tool as claimed in claim 21, It is characterized in that The positioning structure includes at least two second positioning members, wherein at least part of the second positioning members can be slidably assembled on the supporting plate along a first direction.

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