CN115848996A

CN115848996A - Battery module assembly production line and battery module assembly method

Info

Publication number: CN115848996A
Application number: CN202211707294.2A
Authority: CN
Inventors: 孙旭; 孙强; 王利; 王学亮; 蓝兴炜
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-03-28

Abstract

The invention belongs to the technical field of battery production, and discloses a battery module assembly production line and a battery module assembly method. In the battery module assembly production line, a battery cell loading device and a box body loading device are used for loading a battery cell stacking body and a battery box body; the first overturning device grabs a box tray on the battery box body and overturns the battery box body to be in a posture with a downward opening; the battery cell box entering device grabs a battery box body with a downward opening and covers the battery cell stacking body; the second turnover device turns over the assembled battery box body into a posture with an upward opening; the blanking device is used for assembling and finishing blanking of the battery box body; and the battery cell conveying device and the box body conveying device are used for conveying the single-row battery cells and the battery box body. This battery module assembly production line can guarantee the overall stability of electric core stack body in the assembling process, prevents that electric core from dropping to the positioning accuracy that the box was gone into to electric core stack body is higher, and the production quality of the battery module of production gained is higher.

Description

Battery module assembly production line and battery module assembly method

Technical Field

The invention relates to the technical field of battery production, in particular to a battery module assembly production line and a battery module assembly method.

Background

The battery cores are stacked into a large module and then need to be assembled in the box body, so that a required single-row or double-row battery module is manufactured. In the current technological process that electric core piles up into the case, mainly use and move the mechanism and snatch the electric core of piling up and put into the box, move that the mechanism can stabilize snatch single-row electric core stack body, but be unsuitable for the electric core stack body more than the double row. Move and carry mechanism and have the risk that electric core dropped when snatching electric core stack body, even increase electric core anti falling mechanism, also can't guarantee completely that electric core stack body does not take place to collapse and phenomenon such as drop moving the in-process to move the structure that moves the mechanism and also can become complicated and trivial details thereupon, take place failure phenomenon more easily simultaneously. And this kind of electric core pile body goes into the mode of box, and the mode positioning accuracy of its single-row electric core direct access box is poor, leads to single-row electric core position in the box to take place the skew, and the phenomenon of utmost point post decentraction can appear during later stage welding CCS subassembly, causes the product quality of battery module after in groups to reduce.

Therefore, it is desirable to provide a battery module assembly line and a battery module assembly method to solve the problems in the prior art that a battery cell easily drops and the positioning accuracy is poor when a battery cell stack body is put into a box.

Disclosure of Invention

The invention aims to provide a battery module assembly production line, which can ensure the overall stability of a battery cell stacking body in the assembly process and prevent a battery cell from falling, and the battery cell stacking body is higher in positioning precision when being put into a box body, so that the produced battery module is higher in production quality.

In order to achieve the purpose, the invention adopts the following technical scheme:

the battery module assembly production line comprises a battery cell loading device, a box body loading device, a first overturning device, a battery cell box entering device, a second overturning device, a discharging device, a battery cell conveying device and a box body conveying device, wherein the battery cell loading device is used for grabbing a plurality of single-row battery cells from a battery cell loading position and placing the single-row battery cells on a battery cell tray to form a battery cell stacking body and loading the single-row battery cells; the box body feeding device is used for placing the battery box body on a box body tray from a box body feeding position and feeding; the first overturning device is used for grabbing the box body tray on the battery box body and overturning the battery box body to be in a posture with a downward opening; the battery cell box entering device is used for grabbing the battery box body with a downward opening and covering the battery cell stacked body; the second turnover device is used for grabbing the battery cell tray on the battery box body containing the battery cell stacking body and turning the battery box body to be in a posture with an upward opening; the blanking device is used for grabbing the battery box body with an upward opening and accommodating the battery cell stacking body to a blanking position; the battery cell conveying device is used for conveying the battery cell stacking body to the battery cell box entering device through the battery cell feeding device; the box body conveying device is used for conveying the battery box body to the first overturning device, the battery cell box entering device, the second overturning device and the discharging device in sequence through the box body feeding device.

Optionally, the first turnover device and the second turnover device are both box turnover devices, each box turnover device includes a turnover mounting seat, a turnover support, a turnover bearing table, a lifting mechanism and a turnover mechanism, the lifting mechanism is mounted on the turnover mounting seat, the turnover support is slidably connected to the turnover mounting seat, and the turnover bearing table is rotatably connected to the turnover support; the output end of the lifting mechanism is connected with the overturning support in a driving mode and drives the overturning support to move up and down, the overturning mechanism is installed on the overturning support, the output end of the overturning mechanism is connected with the overturning bearing table in a driving mode and drives the overturning bearing table to do overturning motion, and the overturning bearing table is used for fixedly installing the battery cell tray or the box body tray.

Optionally, the lifting mechanism comprises at least one lifting drive and at least one balancing cylinder.

Optionally, a fixing assembly is installed on the overturning bearing table, the fixing assembly includes two oppositely-arranged clamping jaws, and the clamping jaws can be relatively close to and abut against the side wall of the battery cell tray or the side wall of the box tray.

Optionally, the battery cell conveying device includes a first elevator, a second elevator, and an upper battery cell conveying line and a lower battery cell conveying line that are vertically arranged, where the first elevator is configured to convey the battery cell tray from the upper battery cell conveying line to the lower battery cell conveying line, and the second elevator is configured to lift the battery cell tray from the lower battery cell conveying line to the upper battery cell conveying line; the upper battery cell conveying line is used for sequentially conveying the battery cell trays to the battery cell box entering device and the first lifting machine through the battery cell feeding device, and the lower battery cell conveying line is used for conveying the battery cell trays to the second lifting machine through the first lifting machine.

Optionally, the box conveying device includes a third elevator, a box return line and a box conveying line, the box return line and the box conveying line are vertically arranged, the third elevator is used for conveying a box tray to the box conveying line from below the box return line, the box conveying line is used for conveying the box tray to the box feeding device, the first overturning device and the battery cell boxing device in sequence through the third elevator, and the box return line is used for conveying the box tray to the blanking device and the third elevator in sequence through the second overturning device.

Optionally, the battery cell loading device, the box loading device, the battery cell boxing device and the blanking device at least include a manipulator.

Optionally, the battery cell boxing apparatus further includes an industrial camera, and the industrial camera is used for positioning and photographing the battery cell stack and the battery box.

Optionally, the battery cell tray includes a tray body, a fixed reference block and a clamping mechanism are respectively disposed on the tray body and located on two sides of the stacking direction of the battery cell stacking body, the clamping mechanism is slidably connected to the tray body, and the clamping mechanism can be relatively close to the fixed reference block.

Another object of the present invention is to provide a battery module assembling method using the battery module assembling line according to any one of the above aspects, including the steps of: s1, feeding: the battery cell stacking body is loaded by the battery cell loading device; the battery box body is loaded by the box body loading device; s2, overturning the box body: the first turnover device turns the battery box body to a state that the opening is downward; s3, putting the battery cell into a box: the battery cell box body in the S2 is covered on the battery cell stacking body by the battery cell box entering device; s4, secondary overturning: the second overturning device overturns the battery box body containing the battery cell stacking body in the S3 to an upward opening; s5, battery blanking: the discharging device conveys the battery case in which the cell stack body is accommodated in S4 to the discharging position.

Has the advantages that:

according to the battery module assembly production line, multiple rows of single-row battery cores are accommodated on the battery core tray through the battery core feeding device and the box body feeding device respectively, and the battery box body is arranged on the box body tray, so that the multiple rows of battery cores are more accurately positioned when being arranged in the battery box body, the single-row battery cores are not easy to fall off from the battery core tray, and the stability during installation is improved; the in-process of electric core income case, at first use first turning device with the battery box together the upset for the decurrent gesture of opening with box tray, establish the electric core stack body with the decurrent battery box lid of opening by electric core income case device when electric core income case, use second turning device to overturn the battery box into the ascending gesture of opening after electric core income case is accomplished, and the single row electric core of multirow behind the electric core income case and the same unloading of battery box, flow into next process, flow through above electric core income case, when the battery is gone into the case, need not to snatch single row electric core income case, consequently, the single row electric core that the single row of multirow appears snatching when moving the year electric core that appears drops, skew or the inaccurate problem of electric core location, the production quality of final fashioned battery module has been improved.

Drawings

Fig. 1 is an isometric view of a single row of cells stacked on a cell tray provided by an embodiment of the present invention;

FIG. 2 is an isometric view of a battery case according to an embodiment of the present invention placed on a tray of the case;

fig. 3 is a schematic view of a battery module assembly line according to an embodiment of the present invention;

fig. 4 is a partially enlarged view of a portion a in fig. 3.

In the figure:

10. single-row battery cores; 20. a cell tray; 21. a tray body; 22. fixing a reference block; 23. a clamping mechanism; 24. a drive mechanism; 30. a battery case; 40. a box body tray; 41. a tray limiting block;

101. a battery cell feeding line; 102. feeding material into the box body; 103. feeding;

200. a battery cell loading device; 210. a battery cell conveying device; 211. electrifying the core conveying line; 212. a battery core is arranged on the battery core conveying line; 213. a first hoist; 214. a second hoist;

300. a box body feeding device; 310. a box body conveying device; 311. a box body conveying line; 312. a tank return line; 313. a third hoisting machine;

400. a first turning device; 410. overturning the mounting seat; 420. turning over the bracket; 421. lifting the driving member; 422. a balance cylinder; 423. a turnover mechanism; 430. turning over the bearing table; 431. a clamping jaw;

500. a battery cell boxing device; 600. a second turnover device; 700. a blanking device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1, in the present embodiment, a plurality of rows of single-row and a plurality of rows of single-row cells 10 are stacked on a cell tray 20 to form a cell stack body, specifically, the cell tray 20 includes a tray body 21, a fixed reference block 22 and a clamping mechanism 23 are respectively disposed on the tray body 21 and located on two sides of the cell stack body in a stacking direction, the clamping mechanism 23 is slidably connected to the tray body 21, and the clamping mechanism 23 can be relatively close to the fixed reference block 22. In this embodiment, the clamping mechanism 23 is a plurality of sliders that are evenly spaced and slidably connected to the tray body 21, and the driving mechanism 24 drives the plurality of sliders to approach the fixed reference block 22, so as to clamp and fix the single rows of cells 10 in multiple rows. The driving mechanism 24 may be a driving motor, a driving cylinder, or a driving screw, and is not particularly limited herein.

As shown in fig. 2, the battery case 30 is mounted on the case tray 40, and specifically, the case tray 40 is provided with a plurality of tray stoppers 41 surrounding one circle, so as to limit and fix the case tray 40. The single-row battery cell 10 and the box body tray 40 which are respectively fixedly provided with the battery cell tray 20 and the box body tray 40 can ensure that the single-row battery cell 10 and the battery box body 30 of multiple rows cannot shift or deviate during transfer, so that the positioning precision is ensured, the position is more accurate when the single-row battery cell 10 is placed into the battery box body 30, and the assembling accuracy and the quality of a final formed battery are improved.

Referring to fig. 3, the battery module assembly line includes a cell loading device 200, a box loading device 300, a first flipping device 400, a cell boxing device 500, a second flipping device 600, a blanking device 700, a cell conveying device 210, and a box conveying device 310, where the cell loading device 200 is configured to grab a plurality of single-row cells 10 from a cell loading position and place the single-row cells on a cell tray 20 to form a cell stack body and load the cell stack body; the box loading device 300 is used for placing the battery box 30 on the box tray 40 from the box loading position 102 and loading; the first flipping unit 400 is configured to grasp the case tray 40 on the battery case 30 and flip the battery case 30 to a downward-opening posture; the battery cell boxing apparatus 500 is configured to grab the battery box 30 with a downward opening and cover the battery cell stacking body; the second flipping unit 600 is configured to grasp the cell tray 20 on the battery case 30 accommodating the cell stack and flip the battery case 30 to an upward-opening posture; the blanking device 700 is configured to grab the battery case 30 with an upward opening and accommodating the battery cell stack from the blanking position 103 to the battery case 30; the battery cell conveying device 210 is configured to convey the battery cell stack from the battery cell loading device 200 to the battery cell boxing device 500; the box conveying device 310 is configured to sequentially convey the battery box 30 from the box feeding device 300 to the first flipping device 400, the battery cell boxing device 500, the second flipping device 600, and the blanking device 700.

In the battery module assembly line in this embodiment, multiple rows of single-row battery cells 10 are accommodated on the battery cell tray 20 through the battery cell feeding device 200 and the box body feeding device 300, and the battery box body 30 is mounted on the box body tray 40, so that the multiple rows of single-row battery cells 10 are more accurately positioned when mounted in the battery box body 30, and the single-row battery cells 10 are not easily dropped from the battery cell tray 20, thereby improving the stability during mounting; in-process of electric core income case, at first use first turning device 400 with battery box 30 together overturn for opening decurrent gesture with box tray 40, set up on the electric core stack body with the decurrent battery box 30 lid of opening by electric core income case device 500 when electric core income case, reuse second turning device 600 after the electric core income case is accomplished with the upset of battery box 30 not opening decurrent gesture, and the multirow list electric core 10 and the same unloading of battery box 30 behind the electric core income case, flow into next process, flow through above electric core income case, when the battery is gone into the case, need not to snatch the income case of list electric core 10, consequently, the electric core that multirow list electric core 10 appears when snatching the year of transplanting drops, the inaccurate problem of skew or electric core location, the production quality of the battery module of final shaping has been improved.

In this embodiment, optionally, the cell conveying device 210 includes a first hoisting machine 213, a second hoisting machine 214, and an upper cell conveying line 211 and a lower cell conveying line 212 that are arranged up and down, where the first hoisting machine 213 is configured to convey the cell tray 20 from the upper cell conveying line 211 to the lower cell conveying line 212, and the second hoisting machine 214 is configured to hoist the cell tray 20 from the lower cell conveying line 212 to the upper cell conveying line 211; the upper cell conveying line 211 is configured to sequentially convey the cell trays 20 from the cell loading device 200 to the cell boxing device 500 and the first hoisting machine 213, and the lower cell conveying line 212 is configured to convey the cell trays 20 from the first hoisting machine 213 to the second hoisting machine 214. Specifically, the upper cell conveyor line 211 sequentially conveys an empty cell tray 20 or a cell tray 20 carrying multiple rows of single-row cells 10 to the cell loading device 200 and the cell boxing device 500, after the cells are boxed, the cell tray 20 is unloaded and flows into the first elevator 213 after flowing into the second turnover device 600, and is sent to the lower cell conveyor line 212 by the first elevator 213, the lower cell conveyor line 212 conveys the cell tray 20 to the second elevator 214, and is then lifted to the upper cell conveyor line 211 by the second elevator 214, and the next loading of the cell tray 20 and the cells is performed. The arrangement can realize the repeated utilization of the battery core tray 20, reduce the production cost and have good economic benefit.

In a preferred embodiment, the box body transfer device 310 includes a third hoist 313, a box body return line 312 provided vertically, and a box body transfer line 311, the third hoist 313 is configured to transfer the box body tray 40 from the box body return line 312 to the box body transfer line 311, the box body transfer line 311 is configured to transfer the box body tray 40 from the third hoist 313 to the box body loading device 300, the first flipping device 400, and the cell casing device 500 in this order, and the box body return line 312 is configured to transfer the box body tray 40 from the second flipping device 600 to the unloading device 700 and the third hoist 313 in this order. Specifically, the box conveying line 311 conveys the empty box tray 40 to the box feeding device 300 to realize feeding of the battery box 30, and then the box conveying line 311 conveys the box tray 40 bearing the battery box 30 to the box feeding device 300, the first overturning device 400 and the battery cell boxing device 500 in sequence to realize feeding and assembling of multiple rows of single-row battery cells 10 and the battery box 30, the assembled battery box 30 flows into the box return line 312 after being overturned by the second overturning device 600, the box return line 312 conveys the battery box 30 to the blanking device 700, so that the box tray 40 is disassembled, the empty box tray 40 is conveyed to the third lifting machine 313 and is conveyed downwards to the box conveying line 311, so that the empty box tray 40 flows into the box feeding level 102 at the box feeding device 300 to perform next feeding of the box tray 40 and the battery box 30. The arrangement can realize the recycling of the box body tray 40, reduce the production cost and have good economic benefit.

In the present embodiment, the cell loading level is a cell loading line 101, the single row of cells 10 are continuously conveyed from the cell loading line 101, the cell loading device 200 is configured to grab the single row of cells 10 and place the single row of cells 10 in the empty cell tray 20 on the upper cell conveying line 211, and the structure of the cell loading line 101 is well known to those skilled in the art and will not be described in detail herein.

Optionally, the battery cell loading device 200, the box loading device 300, the battery cell boxing device 500, and the blanking device 700 at least include a manipulator. This manipulator is the multiaxis manipulator that assembly production field is commonly used, and its specific structure is no longer repeated in this embodiment.

As a preferred embodiment, the battery cell boxing apparatus 500 further includes an industrial camera, and the industrial camera is used for positioning and photographing the battery cell stack and the battery box 30. This industry camera is installed on the manipulator on electric core income case device 500, fixes a position when manipulator transport battery box 30 lid is established with electric core stack body on and shoots to guarantee the accurate nature of location between battery box 30 and the electric core stack body, further improve production quality. The industrial camera is a common device in the field of production and assembly, and is cooperatively and cooperatively moved with the manipulator through a controller, and the control logic of the controller is well known to those skilled in the art and is not described herein again.

Referring to fig. 4, fig. 4 is an enlarged view of a portion a in fig. 3, that is, a structural diagram of the first flipping unit 400. The first turning device 400 in this embodiment is a box turning device, and specifically includes a turning mounting base 410, a turning support 420, a turning loading platform 430, a lifting mechanism and a turning mechanism 423, wherein the lifting mechanism is mounted on the turning mounting base 410, the turning support 420 is slidably connected to the turning mounting base 410, and the turning loading platform 430 is rotatably connected to the turning support 420; the output end of the lifting mechanism is connected to the turning support 420 in a driving manner and drives the turning support 420 to move up and down, the turning mechanism 423 is mounted on the turning support 420, the output end of the turning mechanism 423 is connected to the turning bearing table 430 in a driving manner and drives the turning bearing table 430 to turn, and the turning bearing table 430 is used for fixedly mounting the cell tray 20 or the box tray 40. In this embodiment, the first flipping unit 400 and the second flipping unit 600 are both box flipping units, so only the structure of the first flipping unit 400 is specifically described here, and the second flipping unit 600 and the first flipping unit 400 have the same structure, and are not described here again. Specifically, no matter the cell tray 20 carrying the battery box 30 or the cell tray 20 carrying the cell stack body is transported to the box turning device, the turning bearing platform 430 fixes the box tray 40 or the cell tray 20 and moves upward, after the turning bearing platform 430 is in place, the turning bearing platform 430 is driven by the turning mechanism 423 to rotate, so that the box tray 40 or the cell tray 20 on the turning bearing platform 430 is turned over, thereby turning the battery box 30, the turning mechanism 423 is a driving motor or a driving cylinder, and the embodiment is not particularly limited.

Specifically, in the first turnover device 400, the box turnover device is used to grab the box tray 40 on the battery box 30 and turn over the battery box 30, so that the opening of the box tray is downward, and thus a battery cell boxing process is performed; in the second flipping unit 600, the battery tray 20 carrying the battery cell stack is grabbed by using the box flipping unit to flip the battery box 30, so that the battery box becomes a posture with an upward opening again, and the battery box is convenient to flow into the blanking unit 700 for blanking, thereby completing the subsequent processing procedure.

Optionally, the lifting mechanism comprises at least one lift drive 421 and at least one counterbalance cylinder 422. The lifting driving piece 421 is used for driving and lifting the turnover bearing platform 430, so that the phenomenon that the battery box body 30 collides with the lower conveying line can be avoided when the battery box body 30 is turned over, and an avoiding effect is achieved; and the arrangement of the balance cylinder 422 makes the overturning carrying platform 430 always keep a horizontal posture when being lifted, and the movement of the overturning carrying platform 430 is more stable and stable. The lifting driving member 421 in this embodiment is a driving cylinder driven by a driving motor, and in this embodiment, there is no specific limitation, and the balance cylinder 422 is provided with two cylinders, so as to further ensure that the movement of the overturning bearing platform 430 is more stable.

Further, a fixing assembly is mounted on the flip-up platform 430, the fixing assembly includes two opposing clamping jaws 431, and the clamping jaws 431 can be relatively close to and abut against the sidewall of the cell tray 20 or the sidewall of the box tray 40. In this embodiment, the two clamping jaws 431 are driven by the driving member to approach relatively, so that the two clamping jaws 431 abut against and clamp the side walls of the battery cell tray 20 or the box tray 40, and the battery cell tray 20 or the box tray 40 is turned over along with the rotation of the turning bearing table 430, thereby turning over the battery box 30.

The embodiment also provides a battery module assembling method, which uses the battery module assembling production line according to any one of the above schemes, and specifically comprises the following steps:

s1, feeding: the above-described cell loading device 200 loads the above-described cell stack body; the case loading device 300 loads the battery case 30. The single-row battery cells 10 and the battery box body 30 are loaded by using the battery cell loading device 200 and the box body loading device 300, and the battery cells and the battery box body are not influenced or cooperated with each other, so that the loading efficiency is improved.

S2, overturning the box body: the first turnover device 400 turns over the battery box 30 to have a downward opening; s3, putting the battery cell into a box: the battery cell boxing apparatus 500 covers the battery box body 30 in the step S2 on the battery cell stacking body. The upset of first time is for turning over battery box 30 for the decurrent gesture of opening to directly the lid is established to electric core stack body on, need not the upset, moves the single row electric core 10 that carries the multirow, consequently the phenomenon that electric core drops and squints can not appear, has improved the production quality of electric core income case in-process.

S4, secondary overturning: the second flipping unit 600 flips the battery case 30, which contains the cell stack in S3, to an open position; s5, battery blanking: the discharging device 700 conveys the battery case 30 in which the cell stack is accommodated in S4 to the discharging position 103. The second turning is to turn the battery case 30 back to the upward-open position, so that the battery case flows into the discharging device 700, thereby facilitating the subsequent production and processing.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Battery module assembly line, its characterized in that includes:

the battery cell loading device (200) is used for grabbing a plurality of single-row battery cells (10) from a battery cell loading position, placing the single-row battery cells on a battery cell tray (20) to form a battery cell stacking body and loading the battery cell stacking body;

the battery box body loading device (300) is used for placing and loading the battery box body (30) on the box body tray (40) from the box body loading position (102);

the first overturning device (400) is used for grabbing the box tray (40) on the battery box body (30) and overturning the battery box body (30) to be in a downward opening posture;

the battery cell box entering device (500) is used for grabbing the battery box body (30) with a downward opening and covering the battery cell stacking body;

a second flipping device (600), the second flipping device (600) being configured to grasp the cell tray (20) on the battery case (30) containing the stack of cells and to flip the battery case (30) into an upward-opening posture;

a blanking device (700), wherein the blanking device (700) is used for grabbing the battery box body (30) with an upward opening and containing the battery core stacked body to a blanking position (103);

a cell conveying device (210), wherein the cell conveying device (210) is used for conveying the cell stack body from the cell loading device (200) to the cell boxing device (500);

the battery box body (30) is sequentially conveyed to the first overturning device (400), the battery cell box entering device (500), the second overturning device (600) and the blanking device (700) through the box body feeding device (300) by the box body conveying device (310).

2. The battery module assembling line according to claim 1, wherein the first turnover device (400) and the second turnover device (600) are both box turnover devices, each box turnover device comprises a turnover mounting seat (410), a turnover bracket (420), a turnover carrying table (430), a lifting mechanism and a turnover mechanism (423), the lifting mechanism is mounted on the turnover mounting seat (410), the turnover bracket (420) is slidably connected to the turnover mounting seat (410), and the turnover carrying table (430) is rotatably connected to the turnover bracket (420); the output end of the lifting mechanism is connected with the overturning support (420) in a driving mode and drives the overturning support (420) to move up and down, the overturning mechanism (423) is installed on the overturning support (420), the output end of the overturning mechanism (423) is connected with the overturning bearing table (430) in a driving mode and drives the overturning bearing table (430) to do overturning motion, and the overturning bearing table (430) is used for fixedly installing the battery cell tray (20) or the box body tray (40).

3. The battery module assembly line of claim 2, wherein the lifting mechanism comprises at least one lifting drive (421) and at least one balancing cylinder (422).

4. The battery module assembling line according to claim 2, wherein a fixing assembly is mounted on the turnover bearing table (430), the fixing assembly comprises two oppositely arranged clamping jaws (431), and the clamping jaws (431) can relatively approach and abut against the side wall of the cell tray (20) or the side wall of the box tray (40).

5. The battery module assembling line according to claim 1, wherein the cell conveying device (210) includes a first hoisting machine (213), a second hoisting machine (214), and an upper cell conveying line (211) and a lower cell conveying line (212) which are arranged up and down, the first hoisting machine (213) is configured to lower the cell tray (20) from the upper cell conveying line (211) to the lower cell conveying line (212), and the second hoisting machine (214) is configured to hoist the cell tray (20) from the lower cell conveying line (212) to the upper cell conveying line (211); the upper battery cell conveying line (211) is used for sequentially conveying the battery cell trays (20) from the battery cell loading device (200) to the battery cell boxing device (500) and the first hoisting machine (213), and the lower battery cell conveying line (212) is used for conveying the battery cell trays (20) from the first hoisting machine (213) to the second hoisting machine (214).

6. The battery module assembling production line of claim 1, wherein the box conveying device (310) comprises a third hoisting machine (313), a box return line (312) and a box conveying line (311) which are arranged up and down, the third hoisting machine (313) is used for conveying box trays (40) from the box return line (312) to the box conveying line (311), the box conveying line (311) is used for conveying the box trays (40) from the third hoisting machine (313) to the box loading device (300), the first overturning device (400) and the battery cell boxing device (500) in sequence, and the box return line (312) is used for conveying the box trays (40) from the second overturning device (600) to the unloading device (700) and the third hoisting machine (313) in sequence.

7. The battery module assembly line of any one of claims 1 to 6, wherein the cell loading device (200), the box loading device (300), the cell boxing device (500) and the blanking device (700) each comprise at least a manipulator.

8. The battery module assembly line of claim 7, wherein the cell binning apparatus (500) further comprises an industrial camera for taking pictures of the cell stack and the battery box (30) in a positioned manner.

9. The battery module assembly line according to any one of claims 1 to 6, wherein the cell tray (20) comprises a tray body (21), a fixed reference block (22) and a clamping mechanism (23) are respectively arranged on the tray body (21) and located on two sides of the cell stack body in the stacking direction, the clamping mechanism (23) is slidably connected to the tray body (21), and the clamping mechanism (23) can be relatively close to the fixed reference block (22).

10. A battery module assembling method, characterized by using the battery module assembling line according to any one of claims 1 to 9, comprising the steps of:

s1, feeding: the cell loading device (200) loads the cell stack; the box body feeding device (300) feeds the battery box body (30);

s2, overturning the box body: the first turnover device (400) turns the battery box body (30) to an opening downward;

s3, putting the battery cell into a box: the battery cell box entering device (500) covers a battery box body (30) in S2 on the battery cell stacking body;

s4, secondary overturning: the second overturning device (600) overturns the battery box body (30) containing the battery cell stacking body in the S3 to an opening upward;

s5, battery blanking: the blanking device (700) conveys the battery box (30) containing the battery cell stacked body in S4 to the blanking position (103).