Barrel type battery pack assembling method

Abstract

The invention belongs to the technical field of batteries, and particularly relates to a barrel-shaped battery pack assembling method which comprises the following steps: acquiring a cylinder, and placing a plurality of limiting plug blocks at the inlet end of the cylinder; the slide rail penetrates into the cylinder, and two ends of the slide rail extend out of the cylinder; a first limiting piece is mounted at the outlet end of the cylinder; a battery module is placed on the sliding rail, and the battery module is fed into the cylinder through the sliding rail; every time the battery module enters the cylinder for a certain distance, a plurality of limiting plug blocks are sequentially mounted on the battery module according to a preset sequence and reach a preset position along with the movement of the battery module until the battery module abuts against the first limiting piece; and mounting a second limiting piece at the inlet end of the cylinder to obtain the barrel-shaped battery pack. According to the cylindrical battery pack assembling method provided by the embodiment of the invention, the plurality of limiting plug blocks penetrate into the cylinder at intervals in the process of feeding the battery module into the cylinder, so that the relative positions of the battery module and the cylinder are limited, and the protection between the battery module and the cylinder is realized through the process.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery pack assembly processes, and particularly relates to a method for assembling a cylindrical battery pack. Background Art

[0002] Many battery modules are usually composed of multiple flat battery cells, making the battery module in the shape of a cuboid or a cube. The battery module is installed in the battery pack. Due to the shape and assembly difficulty of the battery module, the battery pack is slightly larger in size than the battery module.

[0003] However, not all application scenarios are suitable for square battery packs. Some application scenarios require cylindrical battery packs. The battery module and the housing need to be preliminarily processed into a battery pack. The existing battery packs use square battery modules and cylindrical housings. The assembly of the cylindrical battery pack is to insert the battery module into the housing. However, the current assembly process lacks the radial limit of the battery module in the housing. Otherwise, the battery module is prone to collide with the housing after being shaken. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: aiming at the problem that the current assembly process lacks the radial limit of the battery module in the housing, otherwise the battery module is prone to collide with the housing after being shaken, a method for assembling a cylindrical battery pack is provided.

[0005] To solve the above technical problem, an embodiment of the present invention provides a method for assembling a cylindrical battery pack, including

[0006] Obtain a cylinder, and place a plurality of limiting plug blocks at the inlet end of the cylinder;

[0007] Insert a slide rail into the cylinder, and both ends of the slide rail extend out of the cylinder;

[0008] Install a first limiting member at the outlet end of the cylinder;

[0009] Place the battery module on the slide rail, and send the battery module into the cylinder through the slide rail;

[0010] Every time the battery module enters the cylinder for a certain distance, install a plurality of limiting plug blocks on the battery module in a preset order and reach a preset position as the battery module moves until the battery module abuts against the first limiting member;

[0011] Install a second limiting member at the inlet end of the cylinder to obtain a cylindrical battery pack.

[0012] Optionally, the step of obtaining a cylinder and placing a plurality of limiting plug blocks at the inlet end of the cylinder includes:

[0013] Install a bearing base on the ground;

[0014] Lift the cylinder and lay it horizontally on the bearing base, and limit and cooperate the limit structures at both ends of the cylinder and the limit mechanisms at both ends of the bearing base;

[0015] Place multiple limit plug blocks into the cylinder and arrange them side by side near the inlet end of the cylinder.

[0016] Optionally, threading the slide rail into the cylinder with both ends of the slide rail extending out of the cylinder includes:

[0017] Install two track bases on both sides of the bearing base;

[0018] Thread the slide rail into the cylinder from the inlet end and out from the outlet end;

[0019] Fix the slide rail on the track base, and move the slider of the slide rail to the initial position, which is one end of the slide rail near the inlet end of the cylinder.

[0020] Optionally, a plurality of guiding strips are provided on the inner walls of the inlet end and the outlet end of the cylinder. The side wall of the inlet end of the cylinder is deflected inward to form a first retaining ring; the side wall of the outlet end of the cylinder is deflected inward to form a second retaining ring; the first limiting member includes a first cover plate and two first arc rings; the first arc ring includes a first inner arc ring and a second outer arc ring; guiding grooves are provided on both the first inner arc ring and the second outer arc ring;

[0021] Among them, installing the first limiting member at the outlet end of the cylinder includes:

[0022] A plurality of first arc rings are inserted through the guiding grooves and clamped on the side wall of the cylinder by the guiding strips and abutted against the first retaining ring;

[0023] The first cover plate is respectively connected to a plurality of first arc rings.

[0024] Optionally, the limit plug block is spliced by an upper sub-board and a lower sub-board;

[0025] Placing the plurality of limit plug blocks into the cylinder and arranging them side by side near the inlet end of the cylinder includes:

[0026] Place multiple groups of corresponding upper sub-boards and lower sub-boards in the cylinder;

[0027] Each group of upper sub-boards and lower sub-boards is arranged along the axial direction of the cylinder.

[0028] Optionally, after obtaining the cylinder and placing a plurality of limit plug blocks at the inlet end of the cylinder, and before threading the slide rail into the cylinder with both ends of the slide rail extending out of the cylinder, it further includes:

[0029] When threading the slide rail into the cylinder, the tracks of the slide rail sequentially pass through the grooves on a plurality of lower sub-boards.

[0030] Optionally, placing the battery module on the slide rail and feeding the battery module into the cylinder through the slide rail includes:

[0031] Install two end plates on both sides of the track base away from each other;

[0032] Insert two guiding rods into the cylinder from the lower half cavity of the cylinder. The two guiding rods sequentially pass through the guiding holes at the bottom of multiple lower sub - plates, and then pass through the guiding holes at the bottom of the first arc - shaped ring of the first limiting member, and detachably fix the two ends of the guiding rods on the two end plates;

[0033] Place the battery module on the slide rail;

[0034] Insert the other two guiding rods into the cylinder from the upper half cavity of the cylinder. The two guiding rods sequentially pass through the guiding holes at the top of multiple upper sub - plates, and then pass through the guiding holes at the top of the first arc - shaped ring of the first limiting member, and detachably fix the two ends of the guiding rods on the two end plates;

[0035] The slide rail feeds the battery module into the cylinder.

[0036] Optionally, every time the battery module enters the cylinder for a certain distance, install multiple limiting plug blocks on the battery module in a preset order and reach the preset position as the battery module moves until the battery module abuts against the first limiting member, including: when the battery module enters a certain distance, a group of upper sub - plates and lower sub - plates are fixed at the same length position of the battery module to form a limiting plug block by splicing;

[0037] When the battery module enters another section of distance, the formed limiting plug block moves close to the outlet end as the battery module moves, and another group of upper sub - plates and lower sub - plates are fixed at another length position of the battery module to form another limiting plug block;

[0038] Among them, the preset order of the multiple limiting plug blocks is to install the multiple limiting plug blocks from near to far with reference to the second end of the cylinder.

[0039] Optionally, the second limiting member includes four second inner arc - shaped rings, four second outer arc - shaped rings and a second cover plate;

[0040] Installing the second limiting member at the inlet end of the cylinder to obtain a barrel - shaped battery pack includes:

[0041] Detach the two ends of the guiding rod from the two end plates respectively;

[0042] Remove one of the end plates;

[0043] Pull out the guiding rod from the cylinder;

[0044] Insert the four second inner arc - shaped rings into the space between the second retaining ring of the cylinder and the battery module, and clamp the second inner arc - shaped rings on the guiding strips at the second end of the cylinder;

[0045] Embed a second outer arc ring between the second retaining ring and each second inner arc ring;

[0046] The second cover plate is placed between the four second outer arc rings, and the second cover plate is connected to the four second inner arc rings.

[0047] Optionally, install a second limiting member at the inlet end of the cylinder to obtain a barrel-shaped battery pack, including:

[0048] Lift the cylinder upward until the limiting structure of the cylinder and the limiting mechanism of the bearing base are disengaged, and then transport the cylinder to the finished product area.

[0049] According to the barrel-shaped battery pack assembly method of the embodiment of the present invention, the present invention realizes the limitation of the relative position between the battery module and the cylinder by inserting a plurality of limiting plug blocks into the cylinder at intervals during the process of feeding the battery module into the cylinder, thereby realizing the protection between the battery module and the cylinder through this process. Description of the Drawings

[0050] Figure 1 It is a schematic diagram of the finished product after assembly of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0051] Figure 2 It is a schematic diagram of the structure after removing the cylinder of the finished product after assembly of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0052] Figure 3 It is a schematic diagram of the structure of the cylinder of the finished product after assembly of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0053] Figure 4 It is a schematic diagram of a half-section of the finished product after assembly of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0054] Figure 5 It is an exploded view of the first limiting member and the second limiting member of the finished product after assembly of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0055] Figure 6 It is a schematic diagram before the battery module enters of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention;

[0056] Figure 7 It is a partial schematic diagram of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention, used to show the schematic diagram of the slide rail after removing the cylinder;

[0057] Figure 8 It is a schematic diagram of the structure of the bearing base of the barrel-shaped battery pack assembly method provided by the embodiment of the present invention.

[0058] The reference signs in the description are as follows:

[0059] 1. Cylinder; 11. First retaining ring; 12. Second retaining ring; 13. Guide strip; 2. Battery module; 3. First arc ring; 31. First inner arc ring; 32. First outer arc ring; 4. First cover plate; 5. Second arc ring; 51. Second inner arc ring; 52. Second outer arc ring; 6. Second cover plate; 7. Limit plug; 71. Upper sub-plate; 72. Lower sub-plate; 8. Guide hole;

[0060] 100. Carrying base; 101. Base body; 102. Step; 200. Track base; 300. Slide rail; 400. End plate; 500. Guide rod. Specific embodiments

[0061] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0062] Referring to the attached Figures 1-5 In this embodiment, the cylindrical battery pack includes a cylinder 1, a first limiting member, a second limiting member, a limit plug 7 and a battery module 2. Among them, a plurality of guide strips 13 are provided on the inner walls of the inlet end and the outlet end of the cylinder 1, and the side wall of the inlet end of the cylinder 1 is inwardly deflected to form a first retaining ring 11; the side wall of the outlet end of the cylinder 1 is inwardly deflected to form a second retaining ring 12; the first limiting member includes a first cover plate 4 and two first arc rings 3; the first arc ring 3 includes a first inner arc ring 31 and a second outer arc ring 52; guide grooves are provided on both the first inner arc ring 31 and the second outer arc ring 52. The second limiting member includes four second inner arc rings 51, four second outer arc rings 52 and a second cover plate 6.

[0063] Referring to Figure 6 and Figure 7 and in combination with Figure 1 and Figure 4 A method for assembling a cylindrical battery pack provided by the first embodiment of the present invention includes obtaining a cylinder 1 and placing a plurality of limit plugs 7 at the inlet end of the cylinder 1; inserting a slide rail 300 into the cylinder 1, and both ends of the slide rail 300 extend out of the cylinder 1; installing a first limiting member at the outlet end of the cylinder 1; placing the battery module 2 on the slide rail 300, and sending the battery module 2 into the cylinder 1 through the slide rail 300; every time the battery module 2 enters the cylinder 1 for a certain distance, a plurality of limit plugs 7 are sequentially installed on the battery module 2 according to a preset order and reach a preset position as the battery module 2 moves until the battery module 2 abuts against the first limiting member; installing a second limiting member at the inlet end of the cylinder 1 to obtain a cylindrical battery pack.

[0064] In this embodiment, before the battery module 2 penetrates the cylinder 1, a limiting plug 7 is first placed in the cylinder 1. When the battery module 2 enters a certain distance, one of the limiting plugs 7 is fixed on the battery module 2. As the battery module 2 enters the cylinder 1, the battery module 2 enters a certain distance, and another limiting plug 7 is fixed on the battery module 2 and penetrates into the cylinder 1 along with the battery module 2. In this way, multiple limiting plugs 7 are fixed, and the limiting plugs 7 in the circumferential direction of the battery are between the battery module 2 and the cylinder 1, supporting the two and limiting the relative position of the two. In this embodiment, multiple limiting plugs 7 are arranged on the battery module 2 at intervals through such a construction process, which has the advantage of convenient assembly.

[0065] The first step in this embodiment, wherein the cylinder 1 is obtained and a plurality of stopper blocks 7 are placed at the inlet end of the cylinder 1, comprises:

[0066] A bearing base 100 is installed on the ground; the bearing base 100 includes a plurality of base bodies 101, which are arranged in a straight line, and the arrangement direction of the plurality of base bodies 101 is parallel to the axial direction of the cylinder 1, and each base body 101 is provided with an arc surface to fit with the side wall of the cylinder 1.

[0067] The cylinder 1 is hoisted and laid horizontally on the bearing base 100, and the limiting structures at both ends of the cylinder 1 are matched with the limiting mechanisms at both ends of the bearing base 100; steps 102 are respectively provided on the seat body 101 at both ends of the arrangement direction; the first retaining ring 11 and the second retaining ring 12 at the end of the cylinder 1 are deflected inwardly, and the steps 102 on the seat body 101 at both ends of the arrangement direction are respectively matched with the first retaining ring 11 and the second retaining ring 12 to limit the cylinder 1 and prevent the cylinder 1 from shifting on the bearing base 100.

[0068] After the cylinder 1 is placed firmly, a plurality of stopper blocks 7 are placed in the cylinder 1 and arranged side by side near the inlet end of the cylinder 1 .

[0069] In this embodiment, the second step, wherein the slide rail 300 is inserted into the cylinder 1, and both ends of the slide rail 300 extend out of the cylinder 1, comprises:

[0070] Two rail bases 200 are installed on both sides of the bearing base 100 ; wherein the rail bases 200 are located at both ends of the cylinder 1 .

[0071] The slide rail 300 is passed through the cylinder 1 from the inlet end and passed through the outlet end; both ends of the slide rail 300 pass through the cylinder 1.

[0072] The slide rail 300 is fixed on the rail base 200, and the slider of the slide rail 300 moves to the initial position, which is the end of the slide rail 300 close to the entrance end of the cylinder 1. Both ends of the slide rail 300 are installed on two fixed bases by bolts, and then ensure that the slide rail 300 of the slide rail 300 is located at the entrance end of the cylinder 1.

[0073] In this embodiment, in the third step, installing the first limiting member at the outlet end of the cylinder 1 includes:

[0074] Two first arc rings 3 are clamped on the side wall of the cylinder 1 by inserting the guiding strip 13 through the guiding groove and abut against the first retaining ring 11; that is, the two first arc rings 3 are clamped on the inner wall of the cylinder 1, and it is ensured that the first arc ring 3 abuts against the first retaining ring 11.

[0075] Then, the first cover plate 4 is respectively connected to the plurality of first arc rings 3, so that the first cover plate 4 and the plurality of first arc rings 3 are connected as a whole, thereby limiting the battery module 2 at the outlet end of the cylinder 1 to prevent the battery module 2 from detaching from the outlet end of the housing.

[0076] In this embodiment, the limiting plug 7 is formed by splicing an upper sub-plate 71 and a lower sub-plate 72;

[0077] In this embodiment, the plurality of limiting plugs 7 are placed in the cylinder 1 and arranged side by side near the inlet end of the cylinder 1. This step includes:

[0078] Referring to Figure 4 and Figure 7 , a plurality of corresponding upper sub-plates 71 and lower sub-plates 72 are placed in the cylinder 1; an upper sub-plate 71 and a lower sub-plate 72 form a group, and a plurality of groups are placed in the cylinder 1.

[0079] Each group of upper sub-plates 71 and lower sub-plates 72 are arranged along the axial direction of the cylinder 1. The plurality of groups of upper sub-plates 71 and lower sub-plates 72 are arranged from the inlet end to the outlet end of the cylinder 1.

[0080] In this embodiment, after obtaining the cylinder 1 and placing a plurality of limiting plugs 7 at the inlet end of the cylinder 1, and before inserting the slide rail 300 into the cylinder 1 and the two ends of the slide rail 300 extend out of the cylinder 1, it further includes:

[0081] When the slide rail 300 is inserted into the cylinder 1, the track of the slide rail 300 sequentially passes through the grooves on the plurality of lower sub-plates 72. The grooves on the lower sub-plates 72 can allow the slider of the slide rail 300 to slide back and forth. Therefore, when inserting the slide rail 300, the positions of the lower sub-plates 72 and the slide rail 300 need to be adjusted.

[0082] In this embodiment, placing the battery module 2 on the slide rail 300 and feeding the battery module 2 into the cylinder 1 through the slide rail 300 includes:

[0083] Two end plates 400 are respectively installed on two sides of the track base 200 away from each other; mounting holes are provided on the two end plates 400 through which the guiding rod 500 can pass.

[0084] Two guiding rods 500 penetrate into the cylinder 1 from the lower half cavity of the cylinder 1. The two guiding rods 500 sequentially pass through the guiding holes 8 at the bottom of a plurality of lower sub - plates 72, and then pass through the guiding holes 8 at the bottom of the first arc - shaped ring 3 of the first limiting member, and the two ends of the guiding rods 500 are detachably fixed on the two end plates 400. After the guiding rods 500 sequentially pass through the first limiting member and a plurality of lower sub - plates 72, the threaded sections at the two ends of the guiding rods 500 penetrate through the end plates 400, and nuts are connected to the threaded sections to fix the guiding rods 500 on the two end plates 400.

[0085] The battery module 2 is placed on the slide rail 300; another two guiding rods 500 penetrate into the cylinder 1 from the upper half cavity of the cylinder 1. These two guiding rods 500 sequentially pass through the guiding holes 8 at the top of a plurality of upper sub - plates 71, and then pass through the guiding holes 8 at the top of the first arc - shaped ring 3 of the first limiting member, and the two ends of the guiding rods 500 are detachably fixed on the two end plates 400;

[0086] In this embodiment, the guiding rods 500 are divided into upper and lower groups. The lower group is placed first, and the upper group is placed after the battery module 2 is placed. The reason is that after the battery module 2 is hoisted, it is preferably placed on the slide rail 300 from top to bottom. Otherwise, the difficulty of placing the battery module 2 will be greatly increased. Finally, the slide rail 300 sends the battery module 2 into the cylinder 1.

[0087] In this embodiment, every time the battery module 2 enters the cylinder 1 for a certain distance, a plurality of limiting plug blocks 7 are sequentially installed on the battery module 2 in a preset order and reach the preset position as the battery module 2 moves until the battery module 2 abuts against the first limiting member. This step includes: when the battery module 2 enters a certain distance, a group of upper sub - plates 71 and lower sub - plates 72 are fixed at the same length position of the battery module 2 to splice and form the limiting plug blocks 7.

[0088] When the battery module 2 enters another section of distance, the formed limiting plug blocks 7 move close to the outlet end as the battery module 2 moves, and another group of upper sub - plates 71 and lower sub - plates 72 are fixed at another length position of the battery module 2 to splice and form another limiting plug block 7; among them, the preset order of the plurality of limiting plug blocks 7 is to install the plurality of limiting plug blocks 7 from near to far with reference to the second end of the cylinder 1 as the reference benchmark.

[0089] In this embodiment, installing a second limiting member at the inlet end of the cylinder 1 to obtain a cylindrical battery pack includes: removing the two ends of the guiding rods 500 from the two end plates 400 respectively;

[0090] Removing one of the end plates 400;

[0091] Pulling the guiding rods 500 out of the cylinder 1;

[0092] After the entire guiding rod 500 is withdrawn, the four second inner arc rings 51 are all inserted into the space between the second retaining ring 12 of the cylinder 1 and the battery module 2, and the second inner arc rings 51 are clamped on the guiding strip 13 at the second end of the cylinder 1;

[0093] A second outer arc ring 52 is embedded between the second retaining ring 12 and each second inner arc ring 51; that is, each second outer arc ring 52 is respectively embedded between one of the second inner arc rings 51 and the second retaining ring 12.

[0094] The second cover plate 6 is placed between the four second outer arc rings 52, and the second cover plate 6 is connected to the four second inner arc rings 51.

[0095] Lift the cylinder 1 upwards until the limiting structure of the cylinder 1 is disengaged from the limiting mechanism of the bearing base 100, and then transport the cylinder 1 to the finished product area.

[0096] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for assembling a cylindrical battery pack, characterized in that, include Obtain a cylinder, and place a plurality of stopper blocks at the inlet end of the cylinder; Insert the slide rail into the cylinder, and extend both ends of the slide rail out of the cylinder; Installing a first stopper at the outlet end of the cylinder; Place the battery module on the slide rail, and send the battery module into the cylinder through the slide rail; Each time the battery module enters the cylinder for a certain distance, a plurality of stopper blocks are sequentially installed on the battery module in a preset order, and as the battery module moves, the stopper blocks reach the preset position until the battery module abuts against the first stopper. A second stopper is installed at the inlet end of the cylinder to obtain a cylindrical battery pack.

2. The method for assembling a cylindrical battery pack according to claim 1, characterized in that, The obtaining cylinder places a plurality of stopper blocks at the inlet end of the cylinder, including: Install the load-bearing base on the ground; The cylinder is hoisted and laid horizontally on the bearing base, and the limiting structures at both ends of the cylinder are matched with the limiting mechanisms at both ends of the bearing base; A plurality of stopper blocks are placed in the cylinder and arranged side by side near the inlet end of the cylinder.

3. The method for assembling a cylindrical battery pack according to claim 2, characterized in that, The method of inserting the slide rail into the cylinder and extending both ends of the slide rail out of the cylinder comprises: Install two track bases on both sides of the load-bearing base; The slide rail enters from the inlet end of the cylinder and exits from the outlet end; The slide rail is fixed on the rail base, and the slider of the slide rail moves to an initial position, which is an end of the slide rail close to the entrance end of the cylinder.

4. The method for assembling a cylindrical battery pack according to claim 3, characterized in that, A plurality of guide strips are arranged on the inner walls of the inlet end and the outlet end of the cylinder. The side wall of the inlet end of the cylinder is bent inward to form a first retaining ring; the side wall of the outlet end of the cylinder is bent inward to form a second retaining ring; the first limiter includes a first cover plate and two first arc rings; the first arc ring includes a first inner arc ring and a second outer arc ring; The first inner arc ring and the second outer arc ring are both provided with guide grooves; Wherein, the first stopper is installed at the outlet end of the cylinder, comprising: A plurality of first arc rings are inserted into the guide strips through the guide grooves and clamped on the side wall of the cylinder and abut against the first retaining ring; The first cover plates are respectively connected to the plurality of first arc rings.

5. The method for assembling a cylindrical battery pack according to claim 2, characterized in that, The limit stopper block is formed by splicing an upper sub-plate and a lower sub-plate; The plurality of stopper blocks are placed in the cylinder and arranged side by side near the inlet end of the cylinder, comprising: Placing multiple sets of upper sub-plates and lower sub-plates corresponding to each other in the cylinder; Each group of upper sub-plates and lower sub-plates is arranged along the axial direction of the cylinder.

6. The method for assembling a cylindrical battery pack according to claim 5, characterized in that, In the method of obtaining the cylinder, after placing a plurality of stopper blocks at the entrance end of the cylinder and before inserting the slide rail into the cylinder and extending both ends of the slide rail out of the cylinder, the method further includes: When the slide rail penetrates into the cylinder, the track of the slide rail passes through the grooves on the plurality of lower sub-plates in sequence.

7. The method for assembling a cylindrical battery pack according to claim 5, characterized in that, Placing the battery module on the slide rail and sending the battery module into the cylinder through the slide rail includes: Two end plates are installed on both sides of the rail base away from each other; Two guide rods penetrate into the cylinder from the lower half of the cylinder, and the two guide rods sequentially pass through the guide holes at the bottom of the plurality of lower sub-plates, and then penetrate into the guide holes at the bottom of the first arc ring of the first limiter, and the two ends of the guide rods are detachably fixed on the two end plates; The battery module is placed on the slide rail; Insert the other two guide rods into the cylinder from the upper cavity of the cylinder, pass through the guide holes on the top of the plurality of upper sub-plates in sequence, and then pass through the guide holes on the top of the first arc ring of the first limiter, and detachably fix the two ends of the guide rods on the two end plates; The slide rail feeds the battery module into the cylinder.

8. The method for assembling a barrel-shaped battery pack according to claim 5, wherein, Each time the battery module enters the cylinder by a certain distance, a plurality of limiting plug blocks are sequentially installed on the battery module in a preset order and reach a preset position as the battery module moves until the battery module abuts against the first limiting member, including: when the battery module enters a certain distance, a set of upper and lower sub-boards are fixed at the same length position of the battery module to form a limiting plug block by splicing; When the battery module enters another distance, the formed limiting plug block moves closer to the outlet end as the battery module moves, and another set of upper and lower sub-boards are fixed at another length position of the battery module to form another limiting plug block by splicing; Among them, the preset order of the plurality of limiting plug blocks is to install the plurality of limiting plug blocks from near to far with reference to the second end of the cylinder.

9. The method for assembling a barrel-shaped battery pack according to claim 4, wherein, The second limiting member includes four second inner arc rings, four second outer arc rings and a second cover plate; Installing the second limiting member at the inlet end of the cylinder to obtain a barrel-shaped battery pack includes: removing both ends of the guide rod from the two end plates; Removing one of the end plates; Pulling out the guide rod from the cylinder; Inserting four second inner arc rings into the space between the second retaining ring of the cylinder and the battery module, and clamping the second inner arc rings on the guide strips at the second end of the cylinder; Inserting a second outer arc ring between the second retaining ring and each second inner arc ring; Placing the second cover plate between the four second outer arc rings, and connecting the second cover plate with the four second inner arc rings.

10. The method for assembling a barrel-shaped battery pack according to claim 7, wherein, Installing the second limiting member at the inlet end of the cylinder to obtain a barrel-shaped battery pack includes: Lifting the cylinder upward until the limiting structure of the cylinder is disengaged from the limiting mechanism of the bearing base, and then transporting the cylinder to the finished product area.

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