Method for assembling a power battery assembly

Abstract

The application discloses an assembling method of a power battery assembly, which comprises sequentially assembling a plurality of battery packs to first to Nth containing layers; the step of assembling the battery pack to each containing layer comprises: inserting a conveying line into a battery frame and below an Mth containing layer; moving the conveying line upward to make a placement surface of the conveying line protrude from a support surface of the Mth containing layer, conveying the battery pack to an Eth placement position, conveying a second battery pack to the Eth placement position and synchronously conveying a first battery pack to an E-1th placement position, and sequentially conveying the battery pack to the corresponding placement position; moving the conveying line downward to transfer the battery pack to be supported on the support surface of the Mth containing layer; and separating the conveying line from the battery frame. According to the assembling method, the problem that the conveying line cannot be used for automatic assembly due to insufficient layer height of the containing layer can be solved, and the structure size design of the conveying line can be reduced to be limited by the layer height size of the containing layer.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to an assembly method for a power battery assembly. Background Technology

[0002] Currently, the assembly of power battery packs for new energy commercial vehicles mainly relies on manual placement of battery packs into battery frames, resulting in low efficiency, high risk, and waste of human resources. Some related technologies employ automated assembly equipment, using conveyor lines to transport battery packs to the corresponding housing layers within the battery frame. However, in these automated assembly methods, the structural dimensions of the conveyor lines are limited by the height of the housing layers within the battery frame, leading to low rigidity of the conveyor lines. This results in instability during the assembly process and makes it impossible for the conveyor lines to support heavy battery packs. Furthermore, when the housing layer height of some battery frames is insufficient, the automated assembly methods employed in these technologies cannot be used for automatic battery pack assembly.

[0003] Therefore, the structural dimensions of the conveyor line are limited by the height of the housing layer, resulting in low rigidity, and the insufficient height of the housing layer of the battery frame prevents automatic assembly. These are technical problems that urgently need to be solved. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this invention is to provide an assembly method for a power battery assembly that enables automated assembly, achieves high assembly efficiency, and saves manpower. Furthermore, it solves the problem that insufficient height of the receiving layer prevents the use of conveyor lines for automated assembly, reduces the structural size design limitations of the conveyor line due to the height of the receiving layer, and improves the rigidity of the conveyor line, thereby enhancing the stability of the assembly process.

[0005] According to an embodiment of the present invention, the power battery assembly includes a battery frame and a battery pack. The battery frame has multiple layers arranged sequentially in a vertical direction. At least a portion of the bottom surface of the layers has a clearance opening for avoiding a conveyor line. Each layer has multiple placement positions arranged in a second direction. The multiple placement positions in each layer are sequentially arranged in the second direction as first to Eth placement positions, where E≥2 and E is an integer. Each placement position is used to accommodate one battery pack. The battery pack placed in the Fth placement position is the Fth battery pack, where 1≤F≤E and F is an integer. The multiple layers are sequentially arranged from top to bottom as first to Nth layer, where N≥2 and N is an integer. The assembly method of the power battery assembly includes: sequentially assembling multiple battery packs into the first to Nth layer.

[0006] The step of assembling the battery pack in each of the receiving layers includes:

[0007] The first conveying section of the conveying line is inserted into the battery frame along the first direction and is located below the Mth receiving layer, and the second conveying section of the conveying line is located outside the battery frame, 1≤M≤N and M is an integer. The second conveying section and the first conveying section are arranged sequentially along the first direction. The conveying direction of the conveying line is consistent with the first direction, and the second direction is opposite to the first direction.

[0008] The conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height. A portion of the conveyor line is located below the Mth receiving layer. Both the placement surface of the conveyor line and the support surface of the Mth receiving layer are used to place and support the battery pack.

[0009] The conveyor line transports the first battery pack, which is placed on the second conveyor section, to the first conveyor section, so as to transport the first battery pack to the E placement position within the Mth receiving layer;

[0010] The conveyor line transports the second battery pack placed on the second conveyor section to the first conveyor section, so as to transport the second battery pack to the E placement position in the Mth receiving layer, and the conveyor line simultaneously transports the first battery pack from the E placement position to the E-1 placement position;

[0011] This process continues until the first to the Eth battery packs are delivered to their respective first to the Eth placement positions.

[0012] The conveyor line moves downward to transfer the first to the Eth battery packs to the support surface of the Mth receiving layer;

[0013] The conveyor line moves along the second direction to separate from the battery frame.

[0014] According to the assembly method of the power battery assembly of the present invention, during the assembly of the battery pack of the Mth receiving layer, a portion of the conveyor line is inserted into the battery frame and located below the Mth receiving layer. The conveyor line is then raised until its placement surface protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height. The battery pack, placed on another portion of the conveyor line, is then transported to a preset position within the Mth receiving layer via the conveyor line. The battery pack then moves downward via the conveyor line, allowing it to transfer and support itself on the support surface of the Mth receiving layer under its own gravity. This allows the battery pack to be automatically assembled into the preset position within the battery frame. Since the battery pack is transported into the battery frame using a conveyor line, automated assembly can be achieved, resulting in high assembly efficiency and saving manpower.

[0015] Furthermore, since the conveyor line is inserted below the Mth receiving layer during assembly, the conveyor line itself does not occupy much of the height space within the Mth receiving layer. Even when the conveyor line is raised until its placement surface protrudes above the support surface of the Mth receiving layer to a preset protrusion height, a portion of the conveyor line remains below the Mth receiving layer. This reduces the space occupied by the conveyor line in the height of the Mth receiving layer, thus solving the problem of insufficient layer height preventing the use of a conveyor line for automated assembly. It also reduces the limitations imposed by the layer height on the structural dimensions of the conveyor line, allowing for a larger thickness in the vertical direction and a larger width. This improves the rigidity of the conveyor line, reduces deformation or shaking during battery pack transport, and makes the battery pack assembly process more stable. Moreover, a more rigid conveyor line can support heavier battery packs.

[0016] In addition, during the process of assembling multiple battery packs into the same receiving layer using a conveyor line, the first battery pack is first conveyed to the E position of the receiving layer, then the second battery pack is conveyed to the E position of the receiving layer while the first battery pack is simultaneously conveyed to the E-1 position of the receiving layer, and so on, until the first to the E battery packs are conveyed to their respective first to the E positions. This can help to improve the assembly cycle of assembling multiple battery packs in a single receiving layer and increase assembly efficiency.

[0017] In some embodiments of the present invention, after the conveyor line conveys the Fth battery pack placed on the second conveyor section to the first conveyor section and before the conveyor line conveys the F+1th battery pack placed on the second conveyor section to the first conveyor section, the method further includes:

[0018] The conveyor line moves downward to transfer the first to the Fth battery packs to the support surface of the Mth receiving layer;

[0019] The conveyor line moves along the second direction to separate from the battery frame;

[0020] The first conveying section of the conveying line is inserted into the battery frame along the first direction and is located below the Mth receiving layer, while the second conveying section of the conveying line is located outside the battery frame;

[0021] The conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to the preset protrusion height.

[0022] In some embodiments of the present invention, before inserting the first conveying segment of the conveying line into the battery frame along the first direction, the following steps are further included:

[0023] Place the battery pack on the conveyor line;

[0024] The conveyor line transports the battery pack toward the assembly position in a direction close to the battery frame;

[0025] The conveyor line is raised or lowered to a height position matching that of the Mth accommodating layer;

[0026] The battery pack is lifted upwards to separate it from the conveyor line.

[0027] In some embodiments of the present invention, after the conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height, the battery pack that has been lifted upward moves downward to be supported on the second conveyor section of the conveyor line.

[0028] In some embodiments of the present invention, the preset protrusion height ranges from 3mm to 8mm.

[0029] In some embodiments of the present invention, the conveyor line includes a main body and a conveyor unit, the conveyor unit is disposed on the main body and has the placement surface, and the width of the main body is greater than the width of the conveyor unit;

[0030] When the conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height, the main line body is located below the Mth receiving layer.

[0031] In some embodiments of the present invention, the conveying unit includes a plurality of sub-conveying units, the plurality of sub-conveying units being arranged at intervals along the extension direction of the main body, the sub-conveying units having the placement surface, and at least partially adjacent two sub-conveying units defining an avoidance space, the avoidance space being used to avoid the bottom structure of the Mth receiving layer.

[0032] In some embodiments of the present invention, during the assembly of the battery pack in the first to N-1th receiving layers, the first conveying section of the conveying line is inserted into the M+1th receiving layer of the battery frame along a first direction.

[0033] In some embodiments of the present invention, the bottom of the battery frame has a clearance layer located below the Nth housing layer. During the assembly of the battery pack in the Nth housing layer, the first conveying section of the conveyor line is inserted into the clearance layer of the battery frame along the first direction.

[0034] In some embodiments of the present invention, the height dimension of the void-avoiding layer in the vertical direction is smaller than the height dimension of the accommodating layer in the vertical direction.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a schematic flowchart of an assembly method for a power battery assembly according to some embodiments of the present invention;

[0038] Figure 2 This is a schematic diagram of the battery frame of a power battery assembly according to some embodiments of the present invention;

[0039] Figure 3 This is a schematic diagram of an automated assembly equipment for assembling power battery packs according to some embodiments of the present invention;

[0040] Figure 4 yes Figure 3 A schematic diagram of the conveyor line of the automated assembly equipment being inserted into the battery frame.

[0041] Figure label:

[0042] 100. Automated assembly equipment;

[0043] 10. Equipment frame; 20. Mounting bracket; 21. Separation mechanism; 211. Support plate;

[0044] 30. Conveyor line; 301. Placement surface; 31. First conveyor section; 32. Second conveyor section; 33. Main line body; 34. Conveying unit; 341. Sub-conveying unit; 35. Clearance space;

[0045] 40. Positioning device;

[0046] 200. Conveying track;

[0047] 300. Battery frame; 51. Retaining layer; 501. Support surface; 52. Opening; 53. Clearance opening; 54. Bottom structure; 541. Reinforcing beam. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The following is for reference. Figures 1-4 A method for assembling a power battery assembly according to an embodiment of the present invention is described.

[0050] Reference Figures 1-4 According to an embodiment of the present invention, a method for assembling a power battery assembly includes a battery frame 300 and multiple battery packs. The battery frame 300 has multiple receiving layers 51 arranged sequentially in a vertical direction. Battery packs are received within the receiving layers 51, and each receiving layer 51 can receive multiple battery packs. When multiple battery packs are received in each receiving layer 51, the multiple battery packs received in each layer can be arranged along a first direction, which is perpendicular to the vertical direction. At least one side of each receiving layer 51 of the battery frame 300 along the first direction is open, so that battery packs can enter the receiving layer 51 through the opening 52. A conveyor line 30 for conveying battery packs can also be inserted into the receiving layer 51 through the opening 52. At least a portion of the bottom surface of the receiving layer 51 has a clearance opening 53 for avoiding the conveyor line 30.

[0051] Each housing layer 51 has multiple placement positions arranged along a second direction, opposite to the first direction. The placement positions in each housing layer 51 are sequentially designated as the first to the Eth placement positions along the second direction, where E ≥ 2 and E is an integer. Each placement position is used to accommodate one battery pack. The battery pack placed in the Fth placement position is the Fth battery pack, where 1 ≤ F ≤ E and F is an integer. For example, the value of E can be 2, 3, 4, 5, etc. For example, each housing layer 51 may have two, three, four, or five placement positions. Each housing layer 51 has E placement positions, each used to accommodate one battery pack, and each housing layer 51 can accommodate E battery packs. The battery pack placed in the Fth placement position is the Fth battery pack; for example, the battery pack placed in the first placement position is the first battery pack, and the battery pack placed in the second placement position is the second battery pack.

[0052] The battery frame 300 has multiple layers 51, arranged from top to bottom as the first to the Nth layer, where N ≥ 2 and N is an integer. For example, the value of N can be 2, 3, 4, 5, 6, 7, 8, etc. Among all the layers 51, the first layer 51 is located at the top, and the Nth layer 51 is located at the bottom. By setting multiple layers 51 spaced apart along the vertical direction, the space in the vertical direction can be fully utilized, allowing the battery frame 300 to accommodate a larger number of battery packs, which is beneficial to increasing the capacity of the power battery assembly.

[0053] The assembly method for the power battery pack includes sequentially assembling multiple battery packs into the first to Nth receiving layers 51. During the assembly of the multiple battery packs into the multiple receiving layers 51, the battery packs are assembled into each receiving layer 51 in a top-to-bottom order. For example, the first receiving layer 51 is assembled first, then the second receiving layer 51, and so on, until the Nth receiving layer 51 is assembled. By assembling each receiving layer 51 in a top-to-bottom order, the assembly of a battery pack in an upper receiving layer 51 will not affect the assembly of a battery pack in a receiving layer 51 below it.

[0054] The steps for assembling the battery pack in each housing layer 51 include:

[0055] The conveyor line 30 moves along a first direction so that the first conveying segment 31 of the conveyor line 30 is inserted into the battery frame 300 along the first direction (e.g., referring to the e1 direction in the figure), and the first conveying segment 31 of the conveyor line 30 is located below the Mth receiving layer 51. The second conveying segment 32 of the conveyor line 30 is located outside the battery frame 300 and is located on one side of the battery frame 300 along a second direction (e.g., referring to the e2 direction in the figure). The second direction is opposite to the first direction, 1≤M≤N and M is an integer. Before the first conveying segment 31 of the conveyor line 30 is inserted into the battery frame 300 along the first direction, the conveyor line 30 can be located on one side of the battery frame 300 along the second direction. The second conveying segment 32 and the first conveying segment 31 are arranged sequentially along the first direction, and the conveying direction of the conveyor line 30 is consistent with the first direction.

[0056] The conveyor line 30 moves upward as a whole, with a portion of it passing through the clearance opening 53 on the bottom surface of the Mth receiving layer 51. This causes the placement surface 301 of the conveyor line 30 to protrude upward from the support surface 501 of the Mth receiving layer 51 to a predetermined protrusion height. Both the placement surface 301 of the conveyor line 30 and the support surface 501 of the Mth receiving layer 51 are used to place and support the battery pack. The placement surface 301 of the conveyor line 30 is located on the upper surface of the conveyor line 30, and the support surface 501 of the Mth receiving layer 51 is located on the bottom surface of the Mth receiving layer 51. The placement surface 301 of the conveyor line 30 is higher than the Mth receiving layer 51. The support surface 501 has a preset protrusion height that is the vertical height difference between the placement surface 301 of the conveyor line 30 and the support surface 501 of the Mth accommodating layer 51. In this way, during the subsequent process of the conveyor line 30 conveying the battery pack into the Mth accommodating layer 51 along the first direction, interference between the battery pack and the bottom structure 54 of the Mth accommodating layer 51, such as the support surface 501 of the Mth accommodating layer 51, can be avoided. This ensures that the conveyor line 30 can smoothly convey the battery pack into the Mth accommodating layer 51 along the first direction, and part of the conveyor line 30 is still located below the Mth accommodating layer 51.

[0057] The conveyor line 30 transports the first battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the first battery pack to the E placement position in the Mth receiving layer 51. The battery pack can be placed on the second conveyor section 32 of the conveyor line 30 before the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height. Alternatively, the battery pack can be placed on the second conveyor section 32 of the conveyor line 30 after the conveyor line 30 moves upward from the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height. By first transporting the first battery pack to the E placement position in the Mth receiving layer 51 instead of transporting it to the first placement position, it is convenient to transport it synchronously with other battery packs in the same receiving layer 51 until the first battery pack is transported to the first placement position. This can shorten the transport distance of the battery pack transported by the conveyor line 30 in a single transport and reduce the energy consumption of the conveyor line 30.

[0058] The conveyor line 30 transports the second battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the second battery pack to the E placement position in the Mth receiving layer 51. At the same time, the conveyor line 30 transports the first battery pack from the E placement position to the E-1 placement position. By first transporting the second battery pack to the E-1 placement position in the Mth receiving layer 51 instead of transporting it to the second placement position, it is convenient to transport it synchronously with other battery packs in the same receiving layer 51 until the second battery pack is transported to the second placement position. The first battery pack and the second battery pack can be transported synchronously through the conveyor line 30, which can shorten the transport distance of the battery pack transported by the conveyor line 30 in a single transport and reduce the energy consumption of the conveyor line 30.

[0059] This process continues until the first to the Eth battery packs are respectively delivered to their corresponding first to the Eth placement positions, i.e., the first battery pack is delivered to the first placement position, the second battery pack is delivered to the second placement position, and so on until the Eth battery pack is delivered to the Eth placement position;

[0060] The conveyor line 30 moves downward as a whole to transfer the first to the Eth battery packs to the support surface 501 of the Mth receiving layer 51. During the downward movement of the conveyor line 30, the conveyor line 30 separates from the battery packs and no longer serves to support the battery packs. At this time, the battery packs automatically fall onto the support surface 501 of the Mth receiving layer 51 under their own gravity. Thus, by moving downward through the conveyor line 30, the battery packs can be easily transferred and supported on the support surface 501 of the Mth receiving layer 51. The conveyor line 30 can move downward until it does not interfere with the battery frame 300 when moving in the second direction. The Fth battery pack is supported on the support surface 501 of the Mth receiving layer 51 at the Fth placement position.

[0061] The conveyor line 30 moves along the second direction to separate from the battery frame 300. The first conveying section 31 of the conveyor line 30 moves out of the battery frame 300, so that the conveyor line 30 moves along the second direction to one side of the battery frame 300 along the second direction, so as to facilitate the subsequent assembly of the lower receiving layer 51.

[0062] After the battery pack is transported to a preset position within the Mth receiving layer 51, it can be locked and fixed within the Mth receiving layer 51 by fasteners or the like.

[0063] The following steps in the above multiple steps are illustrated as follows: "The conveyor line 30 conveys the first battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to convey the first battery pack to the E placement position in the Mth receiving layer 51; the conveyor line 30 conveys the second battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to convey the second battery pack to the E placement position in the Mth receiving layer 51, and the conveyor line 30 simultaneously conveys the first battery pack from the E placement position to the E-1 placement position; and so on, until the first to the Eth battery packs are respectively conveyed to the corresponding first to the Eth placement positions," are illustrated by example.

[0064] For example, taking E=2 as an example:

[0065] The conveyor line 30 transports the first battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the first battery pack to the second placement position in the Mth receiving layer 51;

[0066] The conveyor line 30 transports the second battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the second battery pack to the second placement position in the Mth receiving layer 51, and the conveyor line 30 simultaneously transports the first battery pack from the second placement position to the first placement position.

[0067] For example, let's take E=3:

[0068] The conveyor line 30 transports the first battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the first battery pack to the third placement position in the Mth receiving layer 51;

[0069] The conveyor line 30 transports the second battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the second battery pack to the third placement position in the Mth receiving layer 51, and the conveyor line 30 simultaneously transports the first battery pack from the third placement position to the second placement position;

[0070] The conveyor line 30 transports the third battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the third battery pack to the third placement position in the M receiving layer 51. At the same time, the conveyor line 30 transports the second battery pack from the third placement position to the second placement position, and at the same time, the conveyor line 30 transports the first battery pack from the second placement position to the first placement position.

[0071] For example, let's take E=4:

[0072] The conveyor line 30 transports the first battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the first battery pack to the fourth placement position in the Mth receiving layer 51;

[0073] The conveyor line 30 transports the second battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the second battery pack to the fourth placement position in the Mth receiving layer 51, and the conveyor line 30 simultaneously transports the first battery pack from the fourth placement position to the third placement position;

[0074] The conveyor line 30 transports the third battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the third battery pack to the fourth placement position in the M receiving layer 51. At the same time, the conveyor line 30 transports the second battery pack from the fourth placement position to the third placement position, and at the same time, the conveyor line 30 transports the first battery pack from the third placement position to the second placement position.

[0075] The conveyor line 30 transports the fourth battery pack placed on the second conveyor section 32 to the first conveyor section 31, so as to transport the fourth battery pack to the fourth placement position in the Mth receiving layer 51. At the same time, the conveyor line 30 transports the third battery pack from the fourth placement position to the third placement position, the second battery pack from the third placement position to the second placement position, and the first battery pack from the second placement position to the first placement position.

[0076] The conveyor line 30 can be a conveyor belt for transporting the battery pack. The movement of the conveyor line 30 along a first direction or a second direction can be achieved by driving the conveyor line 30 with a first drive mechanism, and the movement of the conveyor line 30 along a vertical direction can be achieved by driving the conveyor line 30 with a second drive mechanism.

[0077] For example, in some embodiments, the automated assembly equipment 100 for assembling power battery assemblies may include an equipment stand 10, a mounting bracket 20, a first drive mechanism, a second drive mechanism, and a conveyor line 30. Both the first and second drive mechanisms may include motors, which may be servo motors. The mounting bracket 20 is movably mounted on the equipment stand 10. The first drive mechanism is mounted on the equipment stand 10 and connected to the mounting bracket 20 to drive the mounting bracket 20 to move up and down. The second drive mechanism and the conveyor line 30 are both mounted on the mounting bracket 20. The conveyor line 30 is movable relative to the mounting bracket 20 along a first or second direction. The second drive mechanism is connected to the conveyor line 30 to drive the conveyor line 30 to move relative to the mounting bracket 20 along the first or second direction. Since the conveyor line 30 is mounted on the mounting bracket 20, when the first drive mechanism drives the mounting bracket 20 to move up and down, the conveyor line 30 moves up and down synchronously with the mounting bracket 20.

[0078] The battery frame can be transported to the location of the battery pack to be assembled by an AGV trolley, or it can be transported to the location of the battery pack to be assembled by a conveyor track 200.

[0079] The automatic assembly equipment 100 may also include a positioning device 40 for locking the battery frame 300. After the battery frame is transported to the position of the battery pack to be assembled, the positioning device 40 can lock the battery frame 300 to prevent swinging and for precise positioning.

[0080] According to the assembly method of the power battery assembly of the present invention, during the assembly of the battery pack of the Mth receiving layer 51, a portion of the conveyor line 30 is inserted into the battery frame 300 and located below the Mth receiving layer 51. The conveyor line 30 is then raised until the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height. Then, the battery pack placed on the other portion of the conveyor line 30 is conveyed to a preset position in the Mth receiving layer 51 through the conveyor line 30. The battery pack moves downward through the conveyor line 30, so that it is transferred and supported on the support surface 501 of the Mth receiving layer 51 under its own gravity. Thus, the battery pack can be automatically assembled into the preset position in the battery frame 300. Since the battery pack is conveyed into the battery frame 300 by the conveyor line 30, automated assembly can be achieved, resulting in high assembly efficiency and saving manpower.

[0081] Furthermore, since the conveyor line 30 is inserted below the Mth receiving layer 51 during assembly, the conveyor line 30 itself does not occupy much of the height space within the Mth receiving layer 51. When the conveyor line 30 is raised until its placement surface 301 protrudes above the support surface 501 of the Mth receiving layer 51 to a preset protrusion height, a portion of the conveyor line 30 is still located below the Mth receiving layer 51. This reduces the space occupied by the conveyor line 30 in the height of the Mth receiving layer 51, thus solving the problem of insufficient height of the receiving layer 51 preventing the use of the conveyor line 30 for automatic assembly. It also reduces the limitations imposed by the height of the receiving layer 51 on the structural dimensions of the conveyor line 30. This allows for a larger thickness of the conveyor line 30 in the vertical direction and a larger width, which improves the rigidity of the conveyor line 30 and reduces deformation or shaking during battery pack transport. This makes the battery pack assembly process more stable, and the more rigid conveyor line 30 can support heavier battery packs.

[0082] In addition, during the process of assembling multiple battery packs into the same receiving layer 51 using the conveyor line 30, the first battery pack is first conveyed to the Eth placement position of the receiving layer 51, then the second battery pack is conveyed to the Eth placement position of the receiving layer 51 while the first battery pack is simultaneously conveyed to the E-1 placement position of the receiving layer 51, and so on, until the first to the Eth battery packs are respectively conveyed to the corresponding first to the Eth placement positions. This can help to improve the assembly cycle of assembling multiple battery packs in a single receiving layer 51 and improve assembly efficiency.

[0083] In some embodiments of the present invention, after the conveyor line 30 conveys the Fth battery pack placed on the second conveyor section 32 to the first conveyor section 31 and before the conveyor line 30 conveys the F+1th battery pack placed on the second conveyor section 32 to the first conveyor section 31, the method further includes:

[0084] The conveyor line 30 moves downward as a whole to transfer and support the first to the Fth battery packs onto the support surface 501 of the Mth receiving layer 51. During the downward movement of the conveyor line 30, the conveyor line 30 separates from the battery packs and no longer serves to support the battery packs. At this time, the battery packs automatically fall onto the support surface 501 of the Mth receiving layer 51 under their own gravity. Thus, by moving downward through the conveyor line 30, the battery packs can be easily transferred and supported onto the support surface 501 of the Mth receiving layer 51. The conveyor line 30 can move downward until it does not interfere with the battery frame 300 when moving in the second direction.

[0085] The entire conveyor line 30 moves along the second direction to separate from the battery frame 300. The first conveying section 31 of the conveyor line 30 moves out of the battery frame 300, so that the entire conveyor line 30 moves along the second direction to one side of the battery frame 300 along the second direction, so as to facilitate the subsequent assembly of the lower receiving layer 51.

[0086] The first conveying section 31 of the conveying line 30 is inserted into the battery frame 300 along the first direction, and the first conveying section 31 of the conveying line 30 is located below the Mth receiving layer 51. The second conveying section 32 of the conveying line 30 is located outside the battery frame 300. Before the first conveying section 31 of the conveying line 30 is inserted into the battery frame 300 along the first direction, the entire conveying line 30 can be located on one side of the battery frame 300 along the second direction.

[0087] The conveyor line 30 moves upward as a whole, with a portion of it passing through the clearance opening 53 on the bottom surface of the Mth receiving layer 51. This causes the placement surface 301 of the conveyor line 30 to protrude upward from the support surface 501 of the Mth receiving layer 51 to a predetermined protrusion height. Both the placement surface 301 of the conveyor line 30 and the support surface 501 of the Mth receiving layer 51 are used to place and support the battery pack. The placement surface 301 of the conveyor line 30 is located on the upper surface of the conveyor line 30, and the support surface 501 of the Mth receiving layer 51 is located on the bottom surface of the Mth receiving layer 51. The placement surface 301 of the conveyor line 30 is higher than the Mth receiving layer 51. The support surface 501 has a preset protrusion height that is the vertical height difference between the placement surface 301 of the conveyor line 30 and the support surface 501 of the Mth receiving layer 51. In this way, during the subsequent process of the conveyor line 30 conveying the battery pack into the Mth receiving layer 51 along the first direction, interference between the battery pack and the bottom structure 54 of the Mth receiving layer 51, such as the support surface 501 of the Mth receiving layer 51, can be avoided. This ensures that the conveyor line 30 can smoothly convey the battery pack into the Mth receiving layer 51 along the first direction, and part of the conveyor line 30 is still located below the Mth receiving layer 51.

[0088] In the above technical solution, after the conveyor line 30 conveys the Fth battery pack placed on the second conveyor section 32 to the first conveyor section 31 and transfers the battery pack to the support surface 501 of the battery frame 300, the conveyor line 30 can be separated from the battery frame 300. This makes it convenient to place the battery packs to be assembled later on the conveyor line 30 or to convey them to a position close to the battery frame 300 via the conveyor line 30. For example, the conveyor line 30 can convey the battery pack to the assembly position, and then repeat the above steps so that the first conveyor section 31 of the conveyor line 30 is inserted into the battery frame 300 and the battery pack is placed on the second conveyor section 32 of the conveyor line 30. The F+1th battery pack placed on the second conveyor section 32 is then conveyed to the first conveyor section 31 to be conveyed into the battery frame 300.

[0089] In some embodiments of the present invention, reference is made to... Figures 1-3 Before inserting the first conveying section 31 of the conveyor line 30 into the battery frame 300 along the first direction, the following steps are also included:

[0090] The battery pack is placed on the conveyor line 30. For example, the battery pack can be placed on the conveyor line 30 by manually operating the lifting device or the main robotic arm. The battery pack can be positioned by the initial positioning mechanism.

[0091] The conveyor line 30 transports the battery pack toward the assembly position in a direction close to the battery frame 300. The conveyor line 30 transports the battery pack along the first direction, causing the battery pack to move toward the battery frame 300 until the battery pack is transported to the assembly position. At this time, the battery pack is still supported on the conveyor line 30. The conveyor line 30 and the battery pack are both located on one side of the battery frame 300 along the first direction.

[0092] The conveyor line 30 is raised or lowered to a height position matching the Mth receiving layer 51. By determining the height position of the Mth receiving layer 51, the height position of the conveyor line 30 is adjusted. For example, the conveyor line 30 can be raised to a height position matching the Mth receiving layer 51, or the conveyor line 30 can be lowered to a height position matching the Mth receiving layer 51. When the conveyor line 30 is raised or lowered to a height position matching the Mth receiving layer 51, the first conveying section 31 of the conveyor line 30 can be inserted into the battery frame 300 along the first direction and located below the Mth receiving layer 51. For example, the upper surface of the conveyor line 30 is lower than the bottom surface of the Mth receiving layer 51 and adjacent to the Mth receiving layer 51.

[0093] The battery pack is lifted upwards to separate it from the conveyor line 30. After the battery pack is separated from the conveyor line 30, it is convenient to insert the conveyor line 30 into the battery frame 300 along the first direction. During the process of driving the conveyor line 30 to insert into the battery frame 300 along the first direction, the conveyor line 30 is in an unloaded state, which requires less driving force, reduces energy loss, and also reduces the impact of the conveyor line 30 on the battery pack during its movement along the first direction. For example, it may cause the position of the battery pack to change, resulting in inaccurate subsequent battery pack assembly. This helps to ensure the accuracy of battery pack assembly.

[0094] For example, the automatic assembly equipment 100 may also include a separation mechanism 21, which is mounted on the aforementioned mounting bracket 20. The separation mechanism 21 includes a support plate 211, which can move up and down relative to the mounting bracket 20. When the conveyor line 30 is raised to a height position matching the Mth receiving layer 51, the support plate 211 is located below the battery pack. By moving the support plate 211 upward, the battery pack can be lifted upward, thereby separating the battery pack from the conveyor line 30.

[0095] In some embodiments of the present invention, reference is made to... Figures 1-3 After the conveyor line 30 moves upward so that its placement surface 301 protrudes upward beyond the support surface 501 of the Mth receiving layer 51 to a preset protrusion height, the lifted battery pack moves downward to be supported on the second conveyor section 32 of the conveyor line 30. By moving the conveyor line 30 upward until its placement surface 301 protrudes upward beyond the support surface 501 of the Mth receiving layer 51 to a preset protrusion height, and then placing the battery pack on the second conveyor section 32 of the conveyor line 30, the conveyor line 30 is in an unloaded state during the upward movement of the conveyor line 30. This reduces the requirement for driving force, reduces energy loss, and also reduces the impact of the upward movement of the conveyor line 30 on the battery pack. For example, it may cause changes in the position of the battery pack, resulting in inaccurate subsequent battery pack assembly, thus helping to ensure the accuracy of battery pack assembly.

[0096] For example, when the automatic assembly equipment 100 includes the separation mechanism 21 described above, after the conveyor line 30 moves upward so that the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height, the support plate 211 moves downward, thereby driving the battery pack to move downward synchronously until the battery pack falls onto the second conveying section 32 of the conveyor line 30. The support plate 211 continues to move downward to separate from the battery pack, thereby transferring the battery pack to the second conveying section 32 of the conveyor line 30.

[0097] In some embodiments of the present invention, the preset protrusion height ranges from 3mm to 8mm. For example, the preset protrusion height can be 3mm, 4mm, 5mm, 6mm, 7mm, or 8mm. By setting the preset protrusion height range to 3mm to 8mm, the possibility of interference between the conveyor line 30 and the battery frame 300 during the process of conveying the battery pack to the receiving layer 51 due to an excessively small preset protrusion height can be avoided. This better ensures that the conveyor line 30 conveys the battery pack into the receiving layer 51. Furthermore, it avoids the possibility of interference between the battery pack and the top of the corresponding receiving layer 51 due to the conveyor line 30 occupying too much space in the height direction of the receiving layer 51 if the preset protrusion height is too large. It also avoids the limitation on the height dimension of the conveyed battery pack due to occupying too much space in the height direction of the receiving layer 51.

[0098] In some embodiments of the present invention, reference is made to... Figures 2-4The conveyor line 30 includes a main body 33 and a conveyor unit 34. The conveyor unit 34 is disposed on the main body 33 and has a placement surface 301. The main body 33 is used to support the conveyor unit 34. The main body 33 may include a conveyor drive assembly for driving the conveyor unit 34. The conveyor unit 34 may include a conveyor belt. The width of the main body 33 is greater than the width of the conveyor unit 34. The widths of the main body 33 and the conveyor unit 34 refer to the dimensions in a third direction (refer to direction e3 in the attached figure). This third direction intersects the vertical direction and is perpendicular to the first direction. By including the main body 33 and the conveyor unit 34 disposed on the main body 33, and by making the width of the main body 33 relatively large, the rigidity of the conveyor line 30 is improved, reducing deformation or shaking during the conveying of the battery pack, thus making the battery pack conveying process more stable.

[0099] Specifically, when the conveyor line 30 moves upward so that its placement surface 301 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height, the main line body 33 is located below the Mth receiving layer 51. This arrangement ensures that the wider main line body 33 is located in the Mth receiving layer 51, while allowing the narrower conveyor unit 34 to pass upward through the clearance opening 53 on the bottom surface of the Mth receiving layer 51. This reduces the vertical space occupied by the conveyor line 30 in the Mth receiving layer 51, while allowing the narrower conveyor unit 34 to pass through the clearance opening 53 on the bottom surface of the Mth receiving layer 51 more smoothly. This reduces the probability of interference with the battery frame 300 during the upward movement of the conveyor line 30 until its placement surface 301 protrudes upward from the support surface 501 of the Mth receiving layer 51 to the preset protrusion height.

[0100] In some embodiments of the present invention, reference is made to... Figures 2-4 The conveying unit 34 includes multiple sub-conveying units 341, which are spaced apart along the extension direction of the main line 33. Each sub-conveying unit 341 may include a conveyor belt and has a placement surface 301. At least some adjacent sub-conveying units 341 define a clearance space 35 for avoiding the bottom structure 54 of the Mth receiving layer 51. By configuring the conveying unit 34 as multiple sub-conveying units 341 spaced apart along the extension direction of the main line 33, and defining a clearance space 35 between at least some adjacent sub-conveying units 341 for avoiding the bottom structure 54 of the Mth receiving layer 51, interference between the conveying unit 34 and the battery frame 300 can be avoided during the upward movement of the conveying line 30 until the placement surface 301 of the conveying line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height. This ensures that the conveying line 30 moves upward as a whole to the set height position.

[0101] For example, in some embodiments, the bottom structure 54 of the Mth receiving layer 51 may include a reinforcing beam 541, which may extend in a third direction. The reinforcing beam 541 may be used to strengthen the structural strength and rigidity of the battery frame 300 and reduce the deformation and sway of the battery frame 300. When the conveyor line 30 moves upward so that the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a predetermined protrusion height, at least a portion of the reinforcing beam 541 on the bottom surface of the Mth receiving layer 51 may be accommodated within the aforementioned clearance space 35.

[0102] In some embodiments of the present invention, during the assembly of the battery pack into the first to N-1th receiving layers 51, the first conveying segment 31 of the conveyor line 30 is inserted into the M+1th receiving layer 51 of the battery frame 300 along a first direction. Each of the first to N-1th receiving layers 51 has a receiving layer 51 below it. This allows for full utilization of the space of the lower receiving layer 51 located below and adjacent to the receiving layer 51 to be assembled during the assembly of the battery pack into the first to N-1th receiving layers 51, enabling the conveyor line 30 to be inserted into the lower receiving layer 51.

[0103] In some embodiments of the present invention, the bottom of the battery frame 300 has a clearance layer located below the Nth receiving layer 51. During the assembly of the battery pack in the Nth receiving layer 51, the first conveying section 31 of the conveyor line 30 is inserted into the clearance layer of the battery frame 300 along a first direction. For the Nth receiving layer 51 located at the bottom, by providing a clearance layer at the bottom of the battery frame 300 and below the Nth receiving layer 51, the conveyor line 30 can be inserted into the clearance layer during the assembly of the battery pack into the Nth receiving layer 51. This allows the battery pack to be assembled into the corresponding receiving layer 51 by lifting the conveyor line 30 from below as described above.

[0104] In some embodiments of the present invention, the height of the clearance layer in the vertical direction is smaller than the height of the receiving layer 51 in the vertical direction. For example, the height of the clearance layer in the vertical direction can be slightly larger than the thickness of the conveying line 30 in the vertical direction, so that the conveying line 30 can be smoothly inserted into the clearance layer and smoothly moved out of the clearance layer. For example, the height of the clearance layer in the vertical direction can be half the height of the receiving layer 51 in the vertical direction. By making the height of the clearance layer in the vertical direction smaller than the height of the receiving layer 51 in the vertical direction, wasted space within the battery frame 300 can be avoided, making the structure of the battery frame 300 more compact.

[0105] The following reference Figures 1-4 A method for assembling a battery powertrain according to some embodiments of the present invention is described.

[0106] Reference Figures 1-4 In this embodiment, taking two battery packs per layer 51 as an example, i.e., E=2, the method is explained as follows. The assembly method of the battery powertrain includes sequentially assembling multiple battery packs into the first to Nth layers 51. The steps for assembling battery packs into each layer 51 are as follows:

[0107] Step A1: Place the first battery pack on the conveyor line 30;

[0108] Step A2: Conveyor line 30 transports the first battery pack toward the assembly position in a direction close to the battery frame 300;

[0109] Step A3: Raise the conveyor line 30 to a height position that matches the Mth receiving layer 51;

[0110] Step A4: Lift the first battery pack upwards to separate it from the conveyor line 30;

[0111] Step A5: The first conveying section 31 of the conveying line 30 is inserted into the battery frame 300 along the first direction and is located below the Mth receiving layer 51;

[0112] Step A6: The conveyor line 30 moves upward so that the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height;

[0113] Step A7: The first battery pack, which has been lifted upwards, moves downwards to be supported on the second conveyor section 32 of the conveyor line 30;

[0114] Step A8: Conveyor line 30 transports the first battery pack placed on the second conveyor section 32 to the second placement position in the Mth receiving layer 51;

[0115] Step A9: The conveyor line 30 moves downward to transfer the first battery pack to the support surface 501 of the M receiving layer 51;

[0116] Step A10: The conveyor line 30 moves in the second direction to separate from the battery frame 300;

[0117] Step A11: Place the second battery pack on the conveyor line 30;

[0118] Step A12: Conveyor line 30 transports the second battery pack toward the assembly position in a direction close to the battery frame 300;

[0119] Step A13: Raise the conveyor line 30 to a height position that matches the Mth receiving layer 51;

[0120] Step A14: Lift the second battery pack upwards to separate it from the conveyor line 30;

[0121] Step A15: The first conveying section 31 of the conveying line 30 is inserted into the battery frame 300 along the first direction and is located below the Mth receiving layer 51;

[0122] Step A16: The conveyor line 30 moves upward so that the placement surface 301 of the conveyor line 30 protrudes upward from the support surface 501 of the Mth receiving layer 51 to a preset protrusion height;

[0123] Step A17: The second battery pack, which has been lifted upwards, moves downwards to be supported on the second conveyor section 32 of the conveyor line 30;

[0124] Step A18: Conveyor line 30 transports the second battery pack placed on the second conveyor section 32 to the second placement position in the Mth receiving layer 51, and conveyor line 30 simultaneously transports the first battery pack from the second placement position to the first placement position;

[0125] Step A19: The conveyor line 30 moves downward to transfer and support the first battery pack and the second battery pack on the support surface 501 of the M receiving layer 51. That is, the first battery pack is supported on the support surface 501 of the M receiving layer 51 at the first placement position, and the second battery pack is supported on the support surface 501 of the M receiving layer 51 at the second placement position.

[0126] In step A20, the conveyor line 30 moves in the second direction to separate from the battery frame 300.

[0127] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0128] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0129] In the description of this invention, "a plurality of" means two or more.

[0130] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0131] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0133] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for assembling a power battery assembly, characterized in that, The power battery assembly includes a battery frame and a battery pack. The battery frame has multiple layers arranged sequentially in a vertical direction. At least some of the layers have clearance openings on their bottom surfaces to avoid the conveyor lines. Each layer has multiple placement positions arranged in a second direction. The multiple placement positions in each layer are sequentially arranged in the second direction as first to Eth placement positions, where E≥2 and E is an integer. Each placement position is used to accommodate one battery pack. The battery pack placed in the Fth placement position is the Fth battery pack, where 1≤F≤E and F is an integer. The multiple layers are sequentially arranged from top to bottom as first to Nth layer, where N≥2 and N is an integer. The assembly method of the power battery assembly includes: sequentially assembling multiple battery packs into the first to Nth layer. The step of assembling the battery pack in each of the receiving layers includes: The first conveying section of the conveying line is inserted into the battery frame along the first direction and is located below the Mth receiving layer, and the second conveying section of the conveying line is located outside the battery frame, 1≤M≤N and M is an integer. The second conveying section and the first conveying section are arranged sequentially along the first direction. The conveying direction of the conveying line is consistent with the first direction, and the second direction is opposite to the first direction. The conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height. A portion of the conveyor line is located below the Mth receiving layer. Both the placement surface of the conveyor line and the support surface of the Mth receiving layer are used to place and support the battery pack. The conveyor line transports the first battery pack, which is placed on the second conveyor section, to the first conveyor section, so as to transport the first battery pack to the E placement position within the Mth receiving layer; The conveyor line transports the second battery pack placed on the second conveyor section to the first conveyor section, so as to transport the second battery pack to the E placement position in the Mth receiving layer, and the conveyor line simultaneously transports the first battery pack from the E placement position to the E-1 placement position; This process continues until the first to the Eth battery packs are delivered to their respective first to the Eth placement positions. The conveyor line moves downward to transfer the first to the Eth battery packs to the support surface of the Mth receiving layer; The conveyor line moves along the second direction to separate from the battery frame.

2. The assembly method of the power battery assembly according to claim 1, characterized in that, After the conveyor line transports the Fth battery pack placed on the second conveyor section to the first conveyor section and before the conveyor line transports the F+1th battery pack placed on the second conveyor section to the first conveyor section, the following is also included: The conveyor line moves downward to transfer the first to the Fth battery packs to the support surface of the Mth receiving layer; The conveyor line moves along the second direction to separate from the battery frame; The first conveying section of the conveying line is inserted into the battery frame along the first direction and is located below the Mth receiving layer, while the second conveying section of the conveying line is located outside the battery frame; The conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to the preset protrusion height.

3. The assembly method of the power battery assembly according to claim 2, characterized in that, Before inserting the first conveying section of the conveyor line into the battery frame along the first direction, the following steps are also included: Place the battery pack on the conveyor line; The conveyor line transports the battery pack toward the assembly position in a direction close to the battery frame; The conveyor line is raised or lowered to a height position matching that of the Mth accommodating layer; The battery pack is lifted upwards to separate it from the conveyor line.

4. The assembly method of the power battery assembly according to claim 3, characterized in that, After the conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height, the battery pack, which has been lifted upward, moves downward to be supported on the second conveyor section of the conveyor line.

5. The assembly method of the power battery assembly according to claim 1, characterized in that, The preset protrusion height ranges from 3mm to 8mm.

6. The assembly method of the power battery assembly according to claim 1, characterized in that, The conveyor line includes a main body and a conveyor unit. The conveyor unit is disposed on the main body and has the placement surface. The width of the main body is greater than the width of the conveyor unit. When the conveyor line moves upward so that the placement surface of the conveyor line protrudes upward from the support surface of the Mth receiving layer to a preset protrusion height, the main line body is located below the Mth receiving layer.

7. The assembly method of the power battery assembly according to claim 6, characterized in that, The conveying unit includes multiple sub-conveying units, which are arranged at intervals along the extension direction of the main body. Each sub-conveying unit has a placement surface, and at least a portion of two adjacent sub-conveying units define an avoidance space, which is used to avoid the bottom structure of the Mth receiving layer.

8. The assembly method of the power battery assembly according to any one of claims 1-7, characterized in that, During the assembly of the battery pack in the first to N-1th receiving layers, the first conveying section of the conveyor line is inserted into the M+1th receiving layer of the battery frame along the first direction.

9. The assembly method of the power battery assembly according to claim 8, characterized in that, The bottom of the battery frame has a clearance layer, which is located below the Nth housing layer. During the assembly of the battery pack in the Nth housing layer, the first conveying section of the conveyor line is inserted into the clearance layer of the battery frame along the first direction.

10. The assembly method of the power battery assembly according to claim 9, characterized in that, The height dimension of the air-proof layer in the vertical direction is smaller than that of the housing layer in the vertical direction.

Images