A battery packaging assembly method and a battery pack

Abstract

This application discloses a battery pack assembly method and battery pack, relating to the field of battery technology. The battery pack assembly method includes: a base plate assembly positioning step, in which the base plate assembly is positioned on a positioning platform; a battery pack stacking step, in which multiple individual batteries are stacked on the base plate assembly to form a battery pack; a frame assembly installation step, in which the frame assembly is embedded on the outside of the battery pack, keeping the first fixing part of the frame assembly aligned with the second fixing part on the base plate assembly; and a housing fixing step, in which, after the frame assembly is installed in place, the frame assembly and the base plate assembly are fixed at the first fixing part and the second fixing part. This application allows the battery pack to be directly stacked on the base plate assembly, eliminating the risk of it falling during transportation. It also avoids the problem of excessive clamping force squeezing the individual batteries and causing damage to the internal structure.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery pack assembly method and a battery pack. Background Technology

[0002] In recent years, the new energy vehicle industry has achieved leapfrog development, and the importance of power batteries as the core power source of electric vehicles is self-evident. As a key component of new energy vehicles, battery packs have stringent requirements in terms of assembly quality and efficiency.

[0003] Current mainstream battery packs mainly consist of a battery casing and individual battery cells arranged inside. The conventional assembly process is as follows: first, multiple individual battery cells are assembled into a battery pack on a stacking table, then a robotic arm grips the battery pack, transports it, and assembles it into the battery casing. However, for individual battery cells with larger dimensions, the robotic arm may not be able to grip them tightly enough during transport, which could lead to the risk of individual battery cells in the middle of the battery pack falling off.

[0004] Therefore, how to prevent individual cells from falling out during the transfer process into the battery case and improve the safety and reliability of battery assembly into the case is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a battery pack assembly method to prevent individual batteries from falling out during the boxing and transportation process, thereby improving the safety and reliability of battery assembly into the box.

[0006] Another object of this application is to provide a battery pack assembled using the above-described battery pack assembly method.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] The first aspect of this application provides a battery pack assembly method. The battery pack includes a battery housing and a battery pack disposed within the battery housing. The battery pack includes a plurality of individual cells arranged along a first direction. The battery housing includes a base plate assembly and a frame assembly. The battery pack assembly method includes:

[0009] The base plate assembly positioning step involves positioning the base plate assembly on the positioning platform.

[0010] The battery pack stacking step involves stacking multiple individual cells onto the base plate assembly to form a battery pack.

[0011] The frame assembly installation step involves embedding the frame assembly onto the outside of the battery pack, while keeping the first fixing part of the frame assembly aligned with the second fixing part on the base plate assembly.

[0012] In the box fixing step, after the frame assembly is installed in place, the frame assembly and the base plate assembly are fixed at the first fixing part and the second fixing part.

[0013] The battery pack assembly method disclosed in the above technical solution allows the battery pack to be directly stacked in its final position (on the base plate assembly), eliminating the entire hoisting process and preventing the risk of it falling during transport. Furthermore, the robotic arm requires precise force control when gripping the battery pack; insufficient force will cause it to fall, while excessive force may compress individual cells, causing internal structural damage and potential safety failures. This application's embodiment enables direct stacking of the battery pack on the base plate assembly, completely avoiding secondary damage caused by clamping force. The battery pack is formed in one step on the base plate assembly, eliminating slight misalignment caused by secondary handling. The relative position between the battery pack and the base plate assembly is determined during stacking and maintained until the end, resulting in higher positional accuracy. The energy consumption of the equipment used for transporting the frame assembly is far lower than that for transporting the battery pack; the battery pack assembly method disclosed in this application requires even lower energy consumption for the transport equipment.

[0014] The second aspect of this application provides a battery pack assembled using the battery pack assembly method described above.

[0015] The battery pack disclosed in the above technical solution is assembled using the above battery pack assembly method, and therefore has all the technical effects of the battery pack assembled using the above battery pack assembly method, which will not be repeated here. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the battery pack assembly method disclosed in the embodiments of this application;

[0018] Figure 2 This is a flowchart of a battery pack assembly method disclosed in another embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the base plate assembly after positioning, as disclosed in the embodiments of this application;

[0020] Figure 4 This is a diagram showing the fit between the base plate assembly and the sub-compartment partition beam as disclosed in an embodiment of this application;

[0021] Figure 5 This is a partial enlarged view of the base plate assembly disclosed in the embodiments of this application;

[0022] Figure 6 This is a top view of the base plate assembly after positioning, as disclosed in the embodiments of this application;

[0023] Figure 7 This is a schematic diagram of the stacked battery pack structure disclosed in an embodiment of this application;

[0024] Figure 8 This is a diagram showing the positional relationship between the module stacking assembly and the end plate of the battery pack disclosed in an embodiment of this application;

[0025] Figure 9 This is a structural schematic diagram of the frame component installation process disclosed in the embodiments of this application;

[0026] Figure 10 This is a partial enlarged view of the frame assembly installation process disclosed in the embodiments of this application;

[0027] Figure 11 This is a structural schematic diagram from the bottom view of the positioning platform disclosed in the embodiments of this application.

[0028] The meanings of the various reference numerals in the figure are as follows:

[0029] 100 - Positioning platform; 101 - Second lifting clearance hole; 102 - First lifting clearance hole; 110 - First positioning part; 120 - Second positioning part;

[0030] 200 - Module stacking assembly; 210 - Stacking support base; 211 - Support plate; 212 - Support brace; 220 - Pushing body; 221 - Pushing block; 222 - Pushing link;

[0031] 300 - Frame positioning component; 310 - Positioning base; 320 - First positioning body;

[0032] 400 - Sub-compartment partition beam; 401 - Positioning head;

[0033] 500-Lifting pallet;

[0034] 600 - Base plate assembly; 601 - Positioning hole; 602 - Positioning pin; 603 - Second fixing part;

[0035] 700-cell battery;

[0036] 800 - End plate; 801 - Limiting groove; 802 - Guide ramp;

[0037] 900 - Frame assembly; 901 - Second positioning body; 902 - First fixing part. Detailed Implementation

[0038] This application discloses a battery pack assembly method to prevent individual batteries from falling out during the boxing and transportation process, thereby improving the safety and reliability of battery assembly into the box.

[0039] This application also discloses a battery pack assembled using the above-described battery pack assembly method.

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] For larger individual cells, if the battery pack is first stacked on a stacking platform and then transferred to the battery box by a robotic arm, the individual cells located in the middle area may fall off during the handling process due to insufficient clamping force.

[0042] Therefore, this application discloses a battery pack assembly method that can directly complete the battery pack stacking operation on the base plate assembly, eliminating the need for transferring and handling the stacked battery packs, thereby preventing the battery packs from falling out during loading and improving the safety of the battery pack assembly process.

[0043] like Figure 3 , Figure 7 and Figure 8 As shown in the embodiments of this application, the battery pack assembly method is used to assemble the battery pack. The battery pack includes a battery housing and a battery pack disposed in the battery housing. The battery pack includes a plurality of individual cells 700 arranged along a first direction. The battery housing includes a base plate assembly and a frame assembly 900.

[0044] The 700-cell battery can store chemical energy and controllably convert it into electrical energy. In recyclable batteries, the active materials can be reactivated by charging after discharge, allowing for continued use.

[0045] The battery enclosure is typically a closed or semi-closed structure made of materials such as metal and plastic. It serves as the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios.

[0046] The battery enclosure provides installation space for battery packs, BMS (Battery Management System), BDU (Battery Disconnect Unit), cooling system, electrical connection components, etc., and through reasonable structural design, fixes these components in the battery enclosure to ensure that they maintain a relatively stable position during battery pack operation, and avoids damage to components or loosening of connections due to vibration, impact and other factors.

[0047] The base plate assembly 600 is the main load-bearing component of the battery pack, typically referring to a structural component installed at the bottom of the battery pack, used to support and secure the battery pack, battery management system, and other components inside the battery pack. The base plate assembly 600 is located at the bottom of the frame assembly 900 (the bottom plate of the battery housing), for example, the base plate assembly 600 is fixed to the bottom of the frame assembly 900 by screws or other methods. The base plate assembly 600 can be made of various materials, such as high-strength materials like aluminum alloy, steel, and stainless steel. It should be noted that the base plate assembly 600 may include a bottom heat exchange plate and a bottom protective plate, or it may only include a bottom support plate. This embodiment does not limit the specific structure of the base plate assembly 600, as long as it is used to support the battery pack.

[0048] The frame assembly 900 is the frame structure of the battery box, serving to support, protect, and connect components. The frame assembly 900 can be formed by splicing together multiple beams. The frame assembly 900 may include four sub-frames, joined end-to-end to form an enclosed space, which, together with the base plate assembly 600, forms an accommodating space. The frame assembly 900 may include partition beams to divide the accommodating space into multiple sub-battery compartments.

[0049] like Figure 1 As shown in the embodiments of this application, the battery pack assembly method disclosed includes the following steps.

[0050] Step S100: Base plate assembly positioning step;

[0051] The base plate assembly 600 is positioned on the positioning platform 100. The positioning platform 100 is provided with positioning parts, which surround the base plate positioning area of ​​the positioning platform 100 and are configured to position the base plate assembly 600 within the base plate positioning area. By utilizing the base plate positioning area constrained by each positioning part, a fixed position can be defined for the base plate assembly 600, and movement of the base plate assembly 600 can be prevented when individual cells are stacked on it. In other words, the positioning parts on the positioning platform 100 ensure a more accurate positioning of the base plate assembly 600, providing a reference for the subsequent assembly of the individual cells 700 and the battery box frame assembly 900 (e.g., ...). Figure 7 and Figure 9 (As shown).

[0052] like Figure 6 As shown, the positioning section may include a plurality of first positioning sections 110 and a plurality of second positioning sections 120. The number of both first positioning sections 110 and second positioning sections 120 may be multiple. The structures of the first positioning sections 110 and the second positioning sections 120 are different. The first positioning sections 110 are located at the corners of the base plate positioning area, while the second positioning sections 120 are located at the straight edges of the base plate positioning area. In other words, the first positioning sections 110 are used to position the corners of the base plate assembly 600 and require two limiting edges to limit the two edges at the corners of the base plate assembly 600. The second positioning sections 120 are used to limit the straight edges of the base plate assembly 600 and may have only one limiting edge.

[0053] Step S200: Battery pack stacking step;

[0054] Multiple individual cells 700 are stacked on the base plate assembly 600 to form a battery pack. For example... Figures 6-8 As shown, the stacking pre-tightening of individual cells 700 on the base plate assembly 600 can be completed by the module stacking assembly 200. Specifically, multiple individual cells 700 can be placed on the base plate assembly 600 by manual placement or clamping with small tooling. After the individual cells 700 of the battery pack are in place, the module stacking assembly 200 performs stacking pre-tightening.

[0055] Furthermore, when placing the individual cell 700 onto the base plate assembly 600, the base plate assembly 600 typically has thermally conductive adhesive, preventing the individual cell 700 from tipping over during placement. Even with manual placement, the individual cell 700 can be positioned using a positioning fixture, preventing it from being misaligned or stuck to the thermally conductive adhesive, thus avoiding interference with subsequent operations.

[0056] For ease of understanding, the stacking direction of the individual cells 700 in the battery pack is defined as the first direction. There are at least two module stacking assemblies 200, arranged along the first direction on both sides of the base plate positioning area. This allows a stacking preload to be applied to the battery pack along the first direction from both sides of the battery pack.

[0057] Along the first direction, the module stacking assemblies 200 distributed on both sides of the base plate positioning area can provide stacking pre-tightening force on both sides of the battery pack. During battery stacking, each individual battery cell 700 is arranged sequentially between the two module stacking assemblies 200 along the first direction. When a row of batteries is assembled (a buffer is generally set between two adjacent individual batteries 700), the battery pack (which is generally provided with end plates 800 at both ends) is pressed together by the module stacking assemblies 200.

[0058] The module stacking assembly 200 simulates the pre-tightened state of the battery pack during final use, ensuring that the individual cells 700 are pre-tightened as designed before being placed in the pack. This avoids the risk of short circuits or structural damage caused by relative displacement and friction during vehicle vibrations due to gaps between the individual cells 700. The stacking pre-tightening force applied by the module stacking assembly 200 provides stable conditions for the subsequent installation of the frame assembly 900, making the pack assembly process smoother.

[0059] In the battery pack, the stacking direction of the multiple individual cells 700 (i.e., the arrangement direction of the multiple individual cells 700 in the battery pack, i.e., the first direction) is perpendicular to the target surface of the individual cell 700, which is the surface with the largest area among the side surfaces of the individual cell. This arrangement can improve the space utilization of the individual cells 700 within the pack.

[0060] In this embodiment, the length of the target surface of the single cell 700 can be between 150mm and 800mm. For example, the length of the target surface of the single cell 700 can be 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 800mm, etc. This embodiment does not limit the length of the target surface of the single cell 700; those skilled in the art can select a length within the range of 150mm to 800mm based on their needs.

[0061] Step S300: Border component installation steps;

[0062] like Figure 9 As shown, the frame assembly 900 is fitted onto the outside of the battery pack, with the first fixing part 902 of the frame assembly 900 aligned with the second fixing part 603 on the base plate assembly 600. Specifically, the frame assembly 900 can be lifted above the base plate assembly 600 using a hoisting device and then lowered so that the frame assembly 900 is fitted onto the outside of the battery pack, confining the battery pack within the space enclosed by the frame assembly 900. During the installation of the frame assembly 900, it is necessary to maintain the alignment of the first fixing part 902 of the frame assembly 900 with the second fixing part 603 on the base plate assembly 600 to facilitate subsequent fixing.

[0063] The alignment of the first fixing part 902 of the frame assembly 900 with the second fixing part 603 on the base plate assembly 600 can be achieved by the frame positioning assembly 300. The frame positioning assembly 300 has a first positioning body 320 extending in a direction perpendicular to the positioning platform 100, configured to engage with the second positioning body 901 on the frame assembly 900. The engagement of the first positioning body 320 and the second positioning body 901 in the frame positioning assembly 300 ensures that, during final assembly, the frame assembly 900 can be precisely aligned with the stacked battery pack and the base plate assembly 600 below the battery pack. This achieves the engagement of the frame assembly 900 and the base plate assembly 600, thereby ensuring the precise alignment of the first fixing part 902 of the frame assembly 900 with the second fixing part 603 on the base plate assembly 600.

[0064] The frame positioning assembly 300 may further include a positioning base 310, each positioning base 310 having at least two first positioning bodies 320. Fixing two or more first positioning bodies 320 to the positioning base 310 facilitates the overall lifting and lowering of the first positioning bodies 320. It should be noted that the position and spacing of the first positioning bodies 320 should correspond to the second positioning bodies 901 on the frame assembly 900. The second positioning bodies 901 on the frame assembly 900 can be the mounting holes of the frame assembly 900. That is, the first positioning bodies 320 are positioning shafts, and the second positioning bodies 901 are positioning holes.

[0065] Step S400: Box fixing step;

[0066] After the frame assembly 900 is installed in place, the frame assembly 900 and the base plate assembly 600 are fixed at the first fixing part 902 and the second fixing part 603. For example, both the first fixing part 902 and the second fixing part 603 can be fastening holes, and the frame assembly 900 and the base plate assembly 600 are fixed by fasteners. The fasteners pass through the first fixing part 902 and the second fixing part 603 and are then locked. Alternatively, the first fixing part 902 can be a bolt hole, and the second fixing part 603 can be a fastening hole, with the fastener passing through the second fixing part 603 and locking to the first fixing part 902. This embodiment does not limit the structural form of the first fixing part 902 and the second fixing part 603, as long as it can achieve the fixing of the frame assembly 900 and the base plate assembly 600.

[0067] The battery pack stacking method disclosed in this application allows the battery packs to be directly stacked in their final position (on the base plate assembly 600), eliminating the entire hoisting process and preventing the risk of them falling during transport. Furthermore, the robotic arm gripping the battery pack requires precise force control; insufficient gripping force will cause it to fall, while excessive force may compress the individual battery cells 700, causing internal structural damage and potential safety failures. This application allows for direct stacking of the battery packs on the base plate assembly 600, completely avoiding secondary damage caused by gripping force. There is no slight misalignment due to secondary handling; the relative position between the battery pack and the base plate assembly 600 is determined during stacking and maintained until the final position, resulting in higher positional accuracy. The energy consumption of the equipment used for transporting the frame assembly is far lower than that for transporting the battery pack, and the battery pack stacking method disclosed in this application requires even lower energy consumption for the transport equipment.

[0068] In a specific embodiment of this application, the housing fixing step specifically includes a lifting step and a locking step. The lifting step specifically includes: after the frame assembly 900 is installed in place, lifting the base plate assembly 600 and its battery pack and frame assembly to create an operating space between the base plate assembly 600 and the positioning platform 100.

[0069] Specifically, the entire assembly (base plate assembly 600 and its battery pack and frame assembly 900) can be lifted using a lifting device, creating ample operating space between the base plate assembly 600 and the positioning platform 100. This allows tools (such as electric wrenches) or robotic arms to easily access and complete all tightening operations. Lifting the assembly to a suitable height allows the operator to perform tightening operations in a more comfortable and effortless posture, reducing labor intensity and ensuring consistent torque at each tightening point. The lifting device can be positioned below the positioning platform 100, without occupying additional overhead space.

[0070] The locking step specifically includes: fixing the frame assembly 900 and the base plate assembly 600 at the first fixing part 902 and the second fixing part 603 in the operating space.

[0071] like Figure 11 As shown, the positioning platform 100 is further provided with a first lifting clearance hole 102. The lifting step specifically includes: after the frame assembly 900 is installed in place, the base plate assembly 600 and the battery pack and frame assembly on it are lifted from below the positioning platform 100 at the first lifting clearance hole 102 by a lifting device.

[0072] The lifting device may include a lifting drive device and a lifting platform 500, which is vertically disposed in the area corresponding to the first lifting clearance hole 102. The opening area of ​​the first lifting clearance hole 102 shall not affect the positioning and engagement of the base plate assembly 600 and the positioning platform 100. That is, the base plate assembly 600 can rise above the positioning platform 100 through the first lifting clearance hole 102, and can also descend below the positioning platform 100 through the first lifting clearance hole 102, the latter being hidden inside the first lifting clearance hole 102.

[0073] Without affecting the supporting base plate assembly 600, the opening area of ​​the first lifting clearance hole 102 should be large enough to ensure that the lifting pallet 500 has a large enough area, thereby ensuring a large contact area with the base plate assembly 600, and preventing the base plate assembly 600 from deforming when the assembly (base plate assembly 600 and its battery pack and frame assembly 900) is lifted by the lifting pallet 500.

[0074] In this embodiment, the lifting plate 500 makes large-area contact with the base plate assembly 600, and the lifting force is evenly applied to the lower surface of the base plate assembly 600. This minimizes the force transmission path, thereby improving rigidity and control precision, and reducing positioning errors caused by force transmission deformation. Compared to lifting through only a few points, the lifting plate 500 (typically with a larger area) provides evenly distributed support for the base plate assembly 600, effectively preventing warping or deformation of the base plate assembly 600 during lifting due to uneven force, and avoiding damage to the battery pack and frame assembly 900 on it.

[0075] In a specific embodiment of this application, during the frame assembly installation step, the position of the frame assembly 900 in the direction parallel to the positioning platform 100 is constrained by the frame positioning assembly 300. Taking the positioning platform 100 being parallel to the horizontal plane as an example, the frame assembly 900 can be constrained by the frame positioning assembly 300 in the direction parallel to the horizontal plane to prevent the frame assembly 900 from moving along the horizontal plane during descent, so that the frame assembly 900 can only perform descent in the vertical direction.

[0076] The lifting process specifically includes: after the frame assembly 900 is installed in place, lifting the base plate assembly 600 and its battery pack, frame assembly, and frame positioning assembly 300 to create an operating space between the base plate assembly 600 and the positioning platform 100.

[0077] If the frame positioning component 300 is fixed on the positioning platform 100 and does not move, the frame component 900 will lose its constraint at the moment of lifting, posing a risk of misalignment. In this embodiment, the frame positioning component 300 is also lifted at the same time as the base plate component 600, ensuring that the frame component 900 is also positioned and constrained by the frame positioning component 300 while it is rising, thus preventing the risk of misalignment.

[0078] Furthermore, the positioning platform 100 is provided with a first lifting clearance hole 102 and a second lifting clearance hole 101. The lifting steps specifically include: after the frame assembly 900 is installed in place, the base plate assembly 600 and the battery pack and frame assembly on it are lifted from below the positioning platform 100 at the first lifting clearance hole 102 by a lifting device, and the frame positioning assembly 300 is lifted at the second lifting clearance hole 101.

[0079] In this embodiment, the frame positioning component 300 is vertically positioned in the area corresponding to the second lifting clearance hole 101. The lifting device is configured to lift the frame positioning component 300 through the second lifting clearance hole 101. This ensures that when the base plate assembly 600, its battery pack, and the frame assembly 900 are lifted above the positioning platform 100 for fastening, the frame assembly 900 can still be positioned by the frame positioning component 300. This prevents misalignment between the frame assembly 900 and the base plate assembly 600 after lifting, which would prevent the fasteners from being properly inserted.

[0080] The frame positioning component 300 is raised synchronously, ensuring that the positioning reference used for fastening is completely consistent with the initial positioning reference of the frame assembly, thus avoiding cumulative errors caused by reference conversion. After completing the frame assembly, the operator can directly start the lifting and fastening process without any intermediate checks, adjustments, or realignment steps, avoiding the need for readjustment and alignment due to misalignment between the frame component 900 and the base plate component 600.

[0081] The lifting device can be used to drive the frame positioning component 300 and the base plate component 600 to lift synchronously. The frame positioning component 300 and the base plate component 600 can be driven to lift synchronously by the same lifting device, or they can be driven to lift by separate independent lifting devices, as long as the lifting action is output synchronously.

[0082] Using a single lifting device to drive the frame positioning assembly 300 and the base plate assembly 600 to rise and fall synchronously eliminates the possibility of asynchrony that can occur when using two independent lifting devices, even after precise adjustments. Driving with a single lifting device ensures that the base plate assembly 600 and all frame positioning assemblies 300 rise and fall synchronously as a rigid unit, completely preventing positional deviations caused by asynchrony. In this embodiment, only one lifting device (such as a set of lifting cylinders or electric cylinders) is needed, significantly reducing the number of driving components, sensors, and connectors, thus lowering mechanical complexity and manufacturing costs.

[0083] In a specific embodiment of this application, the frame assembly installation step specifically includes: embedding the frame assembly 900 on the outside of the battery pack, keeping the first fixing part 902 of the frame assembly 900 aligned with the second fixing part 603 on the base plate assembly 600, and removing the stacking preload of the battery pack so as to remove the module stacking assembly 200 that outputs the stacking preload from the installation path of the frame assembly 900.

[0084] In this embodiment, in order to prevent the module stacking assembly 200 from obstructing the installation of the frame assembly 900, after the frame assembly 900 is embedded on the outside of the battery pack, before it is installed in place (before it interferes with the module stacking assembly 200), the module stacking assembly 200 can be moved away from the battery pack to release the stacking preload of the battery pack, and at least the corresponding structure of the module stacking assembly 200 can be removed from the installation path of the frame assembly 900.

[0085] The battery pack stacking process specifically includes: stacking multiple individual cells 700 on the base plate assembly 600 to form a battery pack, and applying at least two independently controllable stacking preloads to the ends of the battery pack in the vertical direction.

[0086] Based on this, the specific steps for installing the frame assembly include: lowering the frame assembly 900 towards the battery pack, and sequentially releasing the stacking preload applied to the ends of the battery pack from top to bottom. When the frame assembly 900 has descended to a point where it overlaps with the battery pack in the vertical direction, the lowest layer of stacking preload is then released. That is, in this embodiment, not all the stacking preload is released simultaneously, but rather in segments from top to bottom to avoid the battery pack expanding and affecting the installation of the frame assembly 900 if all the stacking preload is released at once.

[0087] Specifically, such as Figures 8-10 As shown in one embodiment of this application, the module stacking assembly 200 may include at least two layers of pressing bodies 220 in the vertical direction, and each layer of pressing body 220 can move along a first direction (i.e., the stacking direction). By moving the pressing body 220 along the first direction, the clamping force on the battery pack can be adjusted. When the frame assembly 900 is hoisted above the battery pack and lowered for assembly, in order to prevent the pressing body 220 from interfering with the installation of the frame assembly 900, the movement of the pressing body 220 along the first direction can be used to avoid the installation path (falling direction) of the frame assembly 900.

[0088] When the battery pack loses the clamping constraint of the pusher 220, the buffer between the individual cells 700 will reset and expand. If only one layer of pusher 220 is provided along the height direction (i.e., if only one stacking preload is applied to the end of the battery pack along the vertical direction), the battery pack will expand rapidly the instant the pusher 220 is removed to fit the frame assembly 900, causing its outer dimensions to increase instantaneously. This makes it difficult for the frame assembly 900 to fit in or scratches the individual cells 700 when it is forcibly fitted in.

[0089] In this embodiment, at least two layers of pressing bodies 220 are arranged vertically, allowing each layer of pressing bodies 220 to be gradually retracted from top to bottom, making room for the lowering of the frame assembly 900. After the uppermost pressing body 220 is retracted, the lower pressing bodies 220 continue to exert a clamping effect, providing the necessary pre-tightening force from the lower middle part of the battery pack, effectively suppressing the instantaneous expansion of the battery pack, and ensuring that the battery pack is always in a controlled compressed state from the beginning until the frame assembly 900 is installed in place. Since the outer dimensions of the battery pack remain stable, the frame assembly 900 can be easily and vertically lowered into place without interference, reducing assembly resistance, avoiding component deformation or scratches caused by forced installation, and completely eliminating the friction that may occur between the inner wall of the frame assembly 900 and the side of the battery pack due to expansion.

[0090] Furthermore, between two consecutive releases of the stacking preload, the frame assembly 900 descends a preset distance. That is, after the upper layer's stacking preload is released, the upper layer's pusher 220 retracts to a position that avoids the descent path of the frame assembly 900, and the frame assembly 900 can continue to descend a preset distance (this preset distance is not greater than the distance between the application points of the stacking preload of two adjacent layers; in other words, the preset distance that the frame assembly 900 descends cannot interfere with the lower layer's pusher 220).

[0091] After the preload of the bottom stack is released, the frame assembly 900 can be directly lowered into place since there is no pushing body 220 interfering with the descent path of the frame assembly 900.

[0092] like Figure 8 As shown, the pressing body 220 may include a pressing block 221, which has a limiting boss that mates with the limiting groove 801 of the end plate 800 of the battery pack. It should be noted that the battery pack has end plates 800 at both ends along the first direction. The top of the end plate 800 is a sloping guide portion to facilitate the insertion of the frame assembly 900. Furthermore, on the side of the end plate 800 facing away from the individual battery 700, multiple guide sloping plates 802 are spaced apart along the vertical direction to further facilitate the insertion of the frame assembly 900. The guide sloping plates 802 can mate with the inner wall of the frame assembly 900, facilitating the descent of the frame assembly 900 and simultaneously compressing the battery pack.

[0093] The end plate 800 has a vertically extending groove 801 on the side opposite to the single cell 700. The pressing block 221 of the pressing body 220 has a limiting boss that inserts into the limiting groove 801.

[0094] The limiting boss is embedded in the limiting groove 801 of the end plate 800, forming a firm lateral mechanical lock. This ensures that no lateral sliding or misalignment occurs between the pressing body 220 and the end plate 800 of the battery pack when a large clamping force is applied. The clamping force is evenly applied to the predetermined force-bearing area of ​​the end plate 800 of the battery pack through the mating surfaces of the limiting boss and the limiting groove 801. When the upper pressing body 220 needs to be retracted to make room for the frame assembly 900, the lower pressing body 220, which is still in a clamped state, continues to be firmly locked in place by the limiting boss. This prevents any translational tendency that may occur due to force imbalance under partially constrained conditions, ensuring the absolute stability of the battery pack's position and orientation during the enclosure closing process.

[0095] The module stacking assembly 200 may further include a stacking support 210. The pressing body 220 includes a pressing link 222 and a pressing block 221. The pressing block 221 is connected to the pressing link 222. Typically, the pressing block 221 can be connected to one end of the pressing link 222. Each pressing block 221 may be connected to only one pressing link 222 or multiple pressing links 222. Each pressing link 222 must be arranged in parallel and extend along a first direction.

[0096] The stacking support 210 has a guide hole, and the pushing rod 222 slides within the guide hole and is located on the side of the stacking support 210 facing the end plate 800 of the battery pack. The guide hole provides a rigid linear motion track for the pushing rod 222, forcing the pushing rod 222 and the connected pushing block 221 to move in a first direction. The stacking support 210 may include a support plate 211 and a support brace 212. One fixed surface of the support brace 212 is fixedly connected to the support plate 211, and the other fixed surface is fixedly connected to the positioning platform 100. The guide hole is provided on the support plate 211.

[0097] It should be noted that the pusher 220 can be driven to move along the first direction by a linear displacement drive device (not shown in the figure). In this embodiment, the specific structure of the linear displacement drive device is not limited, and it can be a linear motor, a piston cylinder device, a lead screw mechanism driven by an electric motor or manually, etc.

[0098] In a specific embodiment of this application, the frame assembly installation steps specifically include: a frame lowering step, a pre-tightening force removal step, and a frame positioning step.

[0099] The frame lowering step includes: hoisting the frame assembly 900 above the base plate assembly 600 and moving it downwards towards the base plate assembly 600.

[0100] The preload release step includes: when the frame assembly 900 descends to a point where it overlaps with the battery pack in the vertical direction, the stacking preload of the battery pack is released. That is, even if the stacking preload of the battery pack is released, the battery pack will expand along the first direction and will be constrained by the frame assembly 900; installation can be completed simply by applying a downward force to the frame assembly 900. When the frame assembly 900 descends, it can cooperate with the guide ramp 802 of the end plate 800, and the end plate 800 applies a compressive force to the battery pack along the first direction, completing the compressive preload action on the battery pack.

[0101] The frame positioning step includes: when the frame assembly 900 descends to abut against the base plate assembly 600, it indicates that the frame assembly 900 has descended to the correct position, the frame assembly 900 stops descending, and the first fixing part 902 of the frame assembly 900 is aligned with the second fixing part 603 on the base plate assembly.

[0102] Furthermore, the preload release step may include: after the frame assembly 900 descends to a point where it overlaps with the battery pack in the vertical direction, and the positional relationship between the frame assembly 900 and the base plate assembly 600 in the direction parallel to the positioning platform 100 is constrained by the frame positioning assembly 300, the position of the frame assembly 900 in the horizontal direction is constrained. That is, before the frame assembly 900 descends to the point where the stacking preload is released, the frame positioning assembly 300 and the frame assembly 900 achieve a positioning engagement to prevent the frame assembly 900 from moving and avoid misalignment. Releasing the stacking preload of the battery pack after the positional relationship of the frame assembly 900 in the direction parallel to the positioning platform 100 can avoid the problem of misalignment of the frame assembly 900 due to battery pack expansion.

[0103] like Figure 5 As shown, the base plate assembly 600 is provided with a positioning pin 602, and the frame assembly 900 is provided with a positioning hole that cooperates with the positioning pin 602, which can further improve the positioning accuracy of the frame assembly 900 and the base plate assembly 600.

[0104] Based on this, the specific steps of the frame positioning process include: when the frame assembly 900 descends to the point where the positioning pin 602 is inserted into the positioning hole and the frame assembly 900 abuts against the base plate assembly, the descent is stopped and the first fixing part 902 of the frame assembly 900 is aligned with the second fixing part 603 on the base plate assembly.

[0105] In a specific embodiment of this application, the battery pack stacking step specifically includes: applying a stacking preload force to a plurality of individual cells 700 stacked on the base plate assembly 600 to stack them into a battery pack, such that the length dimension of the stacked battery pack along the stacking direction is smaller than the design dimension in the battery case.

[0106] For example, if the design dimension of the battery pack within the battery housing is L1, and the length dimension of the battery pack formed by stacking multiple individual batteries 700 on the base plate assembly 600 is L2, then L2 < L1. This arrangement facilitates the nesting of the frame assembly 900 onto the battery pack, improving assembly efficiency. After releasing the stacking preload, the battery pack can be reset to its design dimension within the frame assembly 900.

[0107] like Figure 2 As shown in a specific embodiment of this application, the step between the battery pack stacking step and the frame assembly installation step further includes:

[0108] Step S250a: Module connection step;

[0109] Conductive busbars are soldered to the current output terminals of each individual cell 700 in the battery pack to achieve electrical connection between the individual cells 700. The conductive busbars are electrical connectors that enable series and / or parallel connection of the individual cells 700 in the battery pack. In this step, the conductive busbars for the overall output of the battery pack can also be soldered.

[0110] In one specific embodiment of this application, the step between the battery pack stacking step and the frame component installation step further includes:

[0111] Step S250b: Acquisition component connection steps;

[0112] The acquisition unit is connected to the individual cell 700 and / or the conductive bar connected to the individual cell 700. For example, the acquisition unit may include a temperature acquisition unit and / or a voltage acquisition unit.

[0113] Temperature acquisition units generally include a thermistor, typically packaged as a form similar to a metal film resistor, a small ceramic capacitor, or a surface-mount solder joint; these are commonly referred to as thermistors. Some thermistors, such as NTC (Negative Temperature Coefficient) thermistors, exhibit a decrease in resistance with increasing temperature. The thermistor may also be surrounded by a sealant and may have a protective structure consisting of a flexible and / or rigid metal support. Besides NTC thermistors, the temperature acquisition unit can also be any other temperature sensing device capable of detecting battery temperature; this embodiment does not limit the specific type of temperature acquisition unit.

[0114] The temperature acquisition unit can be fixed to the end face of the single cell 700, or to other positions on the casing of the single cell 700, or to the conductive busbar. The voltage acquisition unit can be soldered to the conductive busbar. The installation positions of the temperature acquisition unit and the voltage acquisition unit can be determined according to different battery packs. This embodiment does not limit the specific installation positions of the temperature acquisition unit and the voltage acquisition unit.

[0115] The acquisition component also includes an FPC (Flexible Printed Circuit) main body, which is used to transmit the relevant information collected by the acquisition unit to the battery management system for analysis and judgment of the battery status.

[0116] In one specific embodiment of this application, after the box fixing step, the following is also included:

[0117] Step S500: Electrical component installation steps;

[0118] The BDU is installed into the electrical compartment formed by the frame assembly 900 and the base plate assembly 600, and the battery pack and BDU are connected via busbars. It should be noted that other electrical components within the electrical compartment, such as the BMS, can also be installed in this step.

[0119] In one specific embodiment of this application, after the box fixing step, the following is also included:

[0120] Step S600: Structural adhesive filling step;

[0121] Structural adhesive is used to fill the gap between the battery pack and the battery housing. This adhesive can be foamed structural adhesive, which, when filled into the gap, bonds all the individual cells of the battery pack into a stable, integrated module. This effectively resists vibrations and impacts during vehicle operation, preventing displacement, friction, or deformation of individual cells, and improving structural rigidity and reliability.

[0122] Furthermore, after step S600, the following is also included:

[0123] Step S700: Installation steps for the top heat exchanger plate;

[0124] A top heat exchange plate is fixed above the battery pack, and heat is exchanged between the top heat exchange plate and the upper side of the battery pack. It should be noted that the base plate assembly 600 may include a stacked bottom heat exchange plate and a bottom protective plate, with the bottom protective plate supported by the positioning platform 100. That is, heat exchange plates (bottom heat exchange plate and top heat exchange plate) are provided on both the upper and lower sides of the battery pack to improve the heat exchange efficiency of the battery pack, reduce the temperature of the battery pack during charging and discharging, and improve safety during use.

[0125] Furthermore, the installation steps for the top heat exchanger plate specifically include: applying a thermally conductive structural adhesive layer above the battery pack, and fixing the top heat exchanger plate above the battery pack, so that the top heat exchanger plate makes heat exchange contact with the battery pack through the thermally conductive structural adhesive layer. The thermally conductive structural adhesive layer can fill the gap between the surface of the individual battery cell and the top heat exchanger plate, eliminate air, establish a low thermal resistance heat transfer path, and ensure that heat is quickly transferred from the individual battery cell to the top heat exchanger plate.

[0126] In one specific embodiment of this application, the method further includes the following step before the base plate assembly positioning step:

[0127] Step S000: Pre-processing steps for the base plate assembly;

[0128] The pretreatment steps for the base plate assembly include: the installation of sealant and the installation of sealant.

[0129] The sealing installation steps include: fixing the sealing element in the fixing area of ​​the base plate assembly 600, the sealing element forming a functional area, a second fixing part 603 disposed in the fixing area, and the sealing element having a clearance hole corresponding to the second fixing part 603, so that the fastener can pass through the sealing element when passing through the second fixing part 603. The sealing element is used to seal the contact surface between the base plate assembly 600 and the frame assembly 900, and the sealing element can be sealing foam. It should be noted that the sealing element can be arranged at the location where sealing between the base plate assembly 600 and the frame assembly 900 is required.

[0130] Because the base plate assembly 600 needs to be coated with a thermally conductive adhesive layer at the location where the battery pack is installed, and this thermally conductive adhesive layer has a corrosive effect on the seal, in this embodiment, the base plate assembly pretreatment step also includes a sealant installation step. The sealant installation step includes: fixing the sealant to the side of the seal closest to the functional area, the sealant forming a battery mounting area on the base plate assembly.

[0131] Between the base plate assembly positioning step and the battery pack stacking step, the following is also included:

[0132] Step S150: Thermal conductive adhesive filling step;

[0133] A thermally conductive adhesive layer is filled in the battery mounting area, and the height of the thermally conductive adhesive layer is lower than the height of the retainer and the seal. The retainer is used to prevent the thermally conductive adhesive layer from contacting the seal, and to intercept the material of the thermally conductive adhesive layer to prevent the thermally conductive adhesive layer from corroding the seal and reducing the sealing effect of the seal.

[0134] like Figure 4 As shown, in the case where the battery pack has multiple sub-battery compartments ( Figure 9In the illustrated scheme, the battery pack has two sub-battery compartments, which are separated by a sub-compartment partition beam 400. The sub-compartment partition beam 400 is detachably connected to the base plate assembly 600 to divide the upper side of the base plate assembly 600 into multiple battery mounting areas (corresponding to multiple sub-battery compartments of the battery pack). In this embodiment, when stacking the battery packs in each sub-battery compartment, the sub-compartment partition beam 400 needs to be installed to divide the area on the upper side of the base plate assembly 600 into multiple battery mounting areas. Simultaneously, the sub-compartment partition beam 400 can also separate one end of the individual battery 700 (the end in a second direction, where the second direction is perpendicular to the first direction, such as...). Figure 6 (As shown) Limit the position. After the individual cells 700 are stacked, before the frame assembly 900 is installed, remove the sub-compartment partition beam 400 to avoid interference with the frame assembly 900 and affecting the installation of the frame assembly 900.

[0135] Furthermore, the base plate assembly 600 is provided with positioning holes 601, and the sub-compartment partition beam 400 is provided with positioning heads 401 that engage with the positioning holes 601. It should be noted that the mounting holes of the base plate assembly 600 can be used as positioning holes 601 that engage with the positioning heads 401. That is, the positioning holes 601 are fastening holes, configured to accommodate fasteners for fixing to the partition beams of the frame assembly 900.

[0136] This application also discloses a battery pack, which is assembled using the battery pack assembly method disclosed in the above embodiments. Since it is assembled using the above-described battery pack assembly method, it possesses all the technical effects of the battery pack assembly method described above, and will not be repeated here.

[0137] As illustrated in this application, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0138] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0139] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0140] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A battery packaging method, characterized in that, The battery pack includes a battery housing and a battery pack disposed within the battery housing. The battery pack includes a plurality of individual cells (700) arranged along a first direction. The battery housing includes a base plate assembly and a frame assembly (900). The battery pack assembly method includes: The base plate assembly positioning step involves positioning the base plate assembly (600) on the positioning platform (100); In the battery pack stacking step, multiple individual cells (700) are stacked on the base plate assembly (600) to form a battery pack; The frame assembly installation step involves embedding the frame assembly (900) onto the outside of the battery pack, while keeping the first fixing part (902) of the frame assembly (900) aligned with the second fixing part (603) on the base plate assembly (600). In the box fixing step, after the frame assembly (900) is installed in place, the frame assembly (900) and the base plate assembly (600) are fixed at the first fixing part (902) and the second fixing part (603).

2. The battery packaging method according to claim 1, characterized in that, The specific steps for fixing the housing include: In the lifting step, after the frame assembly (900) is installed in place, the base plate assembly (600) and the battery pack and the frame assembly on it are lifted to form an operating space between the base plate assembly (600) and the positioning platform (100). In the locking step, the frame assembly (900) and the base plate assembly (600) are fixed in the operating space at the first fixing part (902) and the second fixing part (603).

3. The battery packaging method according to claim 2, characterized in that, The positioning platform (100) is provided with a first lifting clearance hole (102); The lifting step specifically includes: after the frame assembly (900) is installed in place, the base plate assembly (600) and the battery pack and the frame assembly on it are lifted at the first lifting clearance hole (102) below the positioning platform (100) by a lifting device.

4. The battery packaging method according to claim 2, characterized in that, In the frame assembly installation step, the position of the frame assembly (900) in the direction parallel to the positioning platform (100) is constrained by the frame positioning assembly (300); The lifting step specifically includes: after the frame assembly (900) is installed in place, lifting the base plate assembly (600) and the battery pack and the frame assembly on it, as well as the frame positioning assembly (300), to form an operating space between the base plate assembly (600) and the positioning platform (100).

5. The battery packaging method according to claim 4, characterized in that, The positioning platform (100) is provided with a first lifting clearance hole (102) and a second lifting clearance hole (101); The lifting steps specifically include: after the frame assembly (900) is installed in place, the base plate assembly (600) and the battery pack and the frame assembly on it are lifted at the first lifting clearance hole (102) below the positioning platform (100) by the lifting device, and the frame positioning assembly (300) is lifted at the second lifting clearance hole (101).

6. The battery packaging method according to claim 1, characterized in that, The specific steps of installing the frame assembly include: embedding the frame assembly (900) on the outside of the battery pack, keeping the first fixing part (902) of the frame assembly (900) aligned with the second fixing part (603) on the base plate assembly (600), removing the stacking preload of the battery pack, and removing the module stacking assembly (200) that outputs the stacking preload from the installation path of the frame assembly (900).

7. The battery packaging method according to claim 1, characterized in that, The battery pack stacking step specifically includes: stacking multiple individual cells (700) on the base plate assembly (600) to form a battery pack, and applying at least two independently controllable stacking preloads to the ends of the battery pack in the vertical direction; The specific steps of installing the frame assembly include: lowering the frame assembly (900) toward the battery pack, removing the stacking preload applied to the end of the battery pack from top to bottom, and removing the bottommost stacking preload when the frame assembly (900) is lowered to an area that overlaps with the battery pack in the vertical direction.

8. The battery packaging method according to claim 7, characterized in that, Between two consecutive releases of the stacking preload, the frame assembly (900) descends a preset distance. After the stacking preload at the bottom layer is released, the frame assembly (900) descends into place.

9. The battery packaging method according to claim 1, characterized in that, The specific steps for installing the border component include: In the frame lowering step, the frame assembly (900) is hoisted above the base plate assembly and moved downwards towards the base plate assembly; In the preload release step, when the frame assembly (900) descends to an area that overlaps with the battery pack in the vertical direction, the stacking preload of the battery pack is released; In the frame positioning step, when the frame assembly (900) descends to abut against the base plate assembly, the frame assembly (900) stops descending, and the first fixing part (902) of the frame assembly (900) remains aligned with the second fixing part (603) on the base plate assembly.

10. The battery packaging method according to claim 9, characterized in that, The preload release step specifically includes: when the frame assembly (900) descends to an area that overlaps with the battery pack in the vertical direction, and the positional relationship between the frame assembly (900) and the base plate assembly (600) in the direction parallel to the positioning platform (100) is constrained by the frame positioning assembly (300), the stacking preload of the battery pack is released.

11. The battery packaging method according to claim 9, characterized in that, The base plate assembly (600) is provided with a positioning pin (602), and the frame assembly (900) is provided with a positioning hole that positions and engages with the positioning pin (602). The specific steps of positioning the frame include: when the frame assembly (900) descends to the point where the positioning pin (602) is inserted into the positioning hole and the frame assembly (900) abuts against the base plate assembly, the descent stops and the first fixing part (902) of the frame assembly (900) is aligned with the second fixing part (603) on the base plate assembly.

12. The battery packaging method according to claim 1, characterized in that, The battery pack stacking step specifically includes: applying a stacking preload force to a plurality of individual cells (700) stacked on the base plate assembly (600) to stack them into a battery pack, such that the length dimension of the stacked battery pack along the stacking direction is smaller than the design dimension in the battery case.

13. The battery packaging method according to any one of claims 1-12, characterized in that, A module connection step is also included between the battery pack stacking step and the frame assembly installation step; The module connection step specifically includes: welding conductive busbars to the current output terminals of each individual cell (700) of the battery pack to achieve electrical connection of each individual cell (700) of the battery pack.

14. The battery packaging method according to any one of claims 1-12, characterized in that, Between the battery pack stacking step and the frame assembly installation step, there is also a component connection step; The connection step of the acquisition component specifically includes: connecting the acquisition part of the acquisition component to the single cell (700) and / or the conductive busbar connected to the single cell (700).

15. The battery packaging method according to any one of claims 1-12, characterized in that, The enclosure fixing step is followed by an electrical component installation step, which includes: installing the BDU into the electrical compartment formed by the frame assembly (900) and the base plate assembly (600), and connecting the battery pack and the BDU via a conductive busbar.

16. The battery packaging method according to any one of claims 1-12, characterized in that, The process includes a structural adhesive filling step after the casing fixing step, which involves filling the gap between the battery pack and the battery casing with structural adhesive.

17. The battery packaging method according to claim 16, characterized in that, The structural adhesive filling step is followed by a top heat exchanger installation step, which includes fixing the top heat exchanger above the battery pack.

18. The battery packaging method according to claim 17, characterized in that, The specific steps for installing the top heat exchange plate include: applying a thermally conductive structural adhesive layer above the battery pack, and fixing the top heat exchange plate above the battery pack, so that the top heat exchange plate makes heat exchange contact with the battery pack through the thermally conductive structural adhesive layer.

19. The battery packaging method according to any one of claims 1-12, characterized in that, The base plate assembly pretreatment step is included before the base plate assembly positioning step, and the base plate assembly pretreatment step includes at least the seal installation step. The sealing installation steps include: fixing the sealing element in the fixing area of ​​the base plate assembly, the sealing element forming a functional area, the second fixing part (902) being disposed in the fixing area, and the sealing element having an avoidance hole corresponding to the second fixing part (902).

20. The battery packaging method according to claim 19, characterized in that, The pretreatment step of the base plate assembly also includes a sealant installation step, which includes fixing the sealant on the side of the sealant near the functional area, and the sealant forming a battery mounting area on the base plate assembly.

21. The battery packaging method according to claim 20, characterized in that, Between the base plate assembly positioning step and the battery pack stacking step, there is also a thermally conductive adhesive filling step, which includes filling a thermally conductive adhesive layer in the battery mounting area, and the height of the thermally conductive adhesive layer is lower than the height of the adhesive barrier and the sealant.

22. The battery packaging method according to any one of claims 1-12, characterized in that, The base plate assembly (600) includes a bottom heat exchange plate and a bottom guard plate arranged in layers, the bottom guard plate being supported on the positioning platform (100).

23. The battery packaging method according to any one of claims 1-12, characterized in that, In the battery pack, the stacking direction of the multiple individual cells is perpendicular to the target surface of the individual cell, and the target surface is the surface with the largest area among the side surfaces of the individual cell.

24. The battery packaging method according to claim 23, characterized in that, The length of the target surface of the single cell is 150mm to 800mm.

25. A battery pack, characterized in that, It is assembled using the battery pack assembly method as described in any one of claims 1-24.

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