Battery cell processing equipment

Abstract

The utility model discloses battery cell processing equipment and a battery cell production method, and belongs to the technical field of lithium battery cell production. The battery cell processing equipment comprises a film covering assembly, a stacking table, a knife pressing mechanism, a picking assembly and a film cutting mechanism, at least one of the film covering assembly and the stacking table can be driven to reciprocate in the horizontal direction, and actions of the film covering assembly, the stacking table and the knife pressing mechanism are matched to perform lamination until a battery cell is formed through stacking; the picking assembly can move back and forth in the horizontal direction, the battery cell formed on the stacking table is moved away from the stacking table to the side far away from the film covering assembly in the moving-away direction, and in the process that the picking assembly moves away from the battery cell, a continuous diaphragm section behind the uppermost layer of diaphragm of the battery cell is laid on the stacking table; a pair of pressing knife mechanisms, close to the picking assembly, on the stacking table presses the continuous diaphragm sections, the diaphragm cutting mechanism cuts off the diaphragms along the sides, close to the picking assembly, of the pressing knife mechanisms, and the pressed continuous diaphragm sections serve as first-layer diaphragms of next to-be-stacked battery cells. Therefore, the stacking of the negative plates can be directly started during the lamination operation of the next battery cell, and additional diaphragm traction and laying operations do not need to be advanced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of lithium battery cell production. Specifically, the present application relates to a cell processing device and a cell production method. Background Art

[0002] The cell of a lithium battery is formed by stacking multiple layers of battery electrodes and separators between adjacent electrodes. The conventional cell forming process is to alternately stack separators, positive electrode sheets, separators, negative electrode sheets, separators, positive electrode sheets, etc. on a stacking table to form a cell. The positive electrode sheets and negative electrode sheets are isolated and insulated by separators, and the last negative electrode sheet is often covered with a layer of separator.

[0003] Only one single cell can be formed in each round of stacking, and after each round of stacking is completed, the diaphragm needs to be cut to obtain an independent cell. After the diaphragm is cut, it will be separated from the stacking table, which means that before processing the next single cell, the diaphragm needs to be pulled to the surface of the stacking table, laid on the stacking table, and then the battery pole stacking and diaphragm bending operations are performed, which reduces the continuity of the connection between adjacent cell processing operations and slows down the pace of stacking operations. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a battery cell processing device and a battery cell production method, which improves the degree of continuous connection between adjacent battery cells in the battery cell cycle processing operation.

[0005] The solution of this application example is implemented through the following contents.

[0006] In a first aspect, an example of the present application provides a cell processing device, the cell processing device comprising a coating assembly, a stacking table, a knife pressing mechanism, a pickup assembly and a film cutting mechanism, wherein:

[0007] The film covering assembly is used to guide and lay the continuous diaphragm onto the stacking table;

[0008] The stacking platform is arranged below the film coating assembly, and is used to receive the laid diaphragms and battery pole pieces. A pair of knife pressing mechanisms are arranged at both ends of the stacking platform in the horizontal direction, and the two knife pressing mechanisms of each pair of knife pressing mechanisms are arranged oppositely on both sides of the stacking platform, and the two pairs of knife pressing mechanisms are used to press the laid battery pole pieces in turn;

[0009] At least one of the film covering assembly and the stacking platform can be driven to reciprocate in the horizontal direction. After the stacking platform receives a battery electrode sheet each time, the stacking platform and the film covering assembly move back and forth relative to each other to fold the diaphragm and lay it on the uppermost battery electrode sheet until the battery cell is stacked.

[0010] The picking assembly can reciprocate in the horizontal direction, and the picking assembly moves the battery cell formed on the stacking table away from the stacking table to the side away from the coating assembly along the moving direction. In the process of the picking assembly moving the battery cell away, the continuous diaphragm section behind the top diaphragm of the battery cell is laid on the stacking table;

[0011] A pair of knife pressing mechanisms on the stacking table close to the pick-up assembly presses the continuous diaphragm segment, and the film cutting mechanism cuts the diaphragm along the side of the knife pressing mechanism close to the pick-up assembly, and the pressed continuous diaphragm segment serves as the first layer diaphragm of the next battery cell to be stacked.

[0012] The battery cell processing equipment provided by the present application, the coating component, the stacking table and the pressing knife mechanism cooperate to perform lamination until the stacking forms a battery cell, the picking up component moves the battery cell from the stacking table to the side away from the coating component, and in the process of moving away, the continuous diaphragm segment after the top diaphragm of the battery cell is laid on the stacking table, and a pair of pressing knife mechanisms on the stacking table close to the picking up component always press the continuous diaphragm segment, so as to ensure that when the film cutting mechanism cuts the diaphragm along the side of the pressing knife mechanism close to the picking up component, a layer of diaphragm is laid on the stacking table. Therefore, when the battery cell is prepared in a cycle, the lamination operation of the next battery cell can directly start the stacking action of the battery pole piece without the need to first enter the additional diaphragm traction and laying operation. Thereby, the continuity of the connection of adjacent battery cell processing operations is higher, and the rhythm of the lamination operation is faster.

[0013] According to some examples of the first aspect of the present application, when the laying direction of the diaphragm on the topmost battery electrode sheet of the battery cell formed on the stacking table is the same as the moving direction of the picking assembly, a pair of pressing knife mechanisms close to the picking assembly press the two side edges of the diaphragm on the topmost battery electrode sheet, and the relative reciprocating movement of the stacking table and the coating assembly cooperates to fold and form the last layer of diaphragm on the diaphragm on the topmost battery electrode sheet, so that the extension direction of the last layer of diaphragm is opposite to the moving direction of the picking assembly, and the picking assembly moves the battery cell away from the stacking table along the moving direction.

[0014] After the first layer of diaphragm is formed on the last battery electrode of the battery cell with the same laying direction as the moving direction of the picking assembly, two pressing knife mechanisms close to the folded part of the diaphragm press the two side edges of the diaphragm. The action of pressing the diaphragm cooperates with the relative reciprocating movement of the stacking table and the coating assembly to fold and form a second layer of diaphragm on the first layer of diaphragm. In this way, the extension direction of the second layer of diaphragm (i.e. the last layer of diaphragm) is opposite to the moving direction of the picking assembly, so as to facilitate the picking assembly to move the battery cell from the stacking table to the side away from the coating assembly.

[0015] According to other examples of the first aspect of the present application, when the laying direction of the diaphragm on the topmost battery electrode of the battery cell formed on the stacking table is opposite to the moving direction of the picking component, the picking component moves the battery cell away from the stacking table along the moving direction.

[0016] When the laying and extending direction of the diaphragm on the uppermost battery electrode is opposite to the moving direction of the pick-up assembly, the pick-up assembly can be directly used to move the battery cell from the stacking table to the side away from the coating assembly.

[0017] According to some examples of the first aspect of the present application, the laminating assembly includes a mounting seat and a conveying roller, the conveying roller and the film cutting mechanism are both arranged on the mounting seat, and the film cutting mechanism is arranged on one side of the conveying roller in a liftable manner, and the conveying roller is used to convey the continuous diaphragm to the stacking table;

[0018] After a pair of knife pressing mechanisms close to the picking assembly on the stacking table press the continuous diaphragm segment, the coating assembly moves to the vicinity of the knife pressing mechanism pressing the diaphragm, and the film cutting mechanism descends and cuts the diaphragm along the side of the knife pressing mechanism close to the picking assembly; or, after a pair of knife pressing mechanisms close to the picking assembly on the stacking table press the continuous diaphragm segment, the stacking table moves to the bottom of the coating assembly so that the film cutting mechanism is located on the outside of the knife pressing mechanism pressing the diaphragm, and the film cutting mechanism cuts the diaphragm downwards.

[0019] The film cutting mechanism is arranged on the mounting seat of the coating assembly and is adjacent to one side of the transmission roller, and the film cutting mechanism cuts the diaphragm as the coating assembly moves relative to the stacking table (for example, at least one of the coating assembly and the stacking table moves). This improves the utilization rate and integration of the structural components. Compared with the additional independent arrangement of the film cutting mechanism and the coating assembly, this method saves the redundant arrangement and space occupation of similar components (such as the mounting seat and the related mechanism that drives the mounting seat to move).

[0020] According to some examples of the first aspect of the present application, the battery cell processing equipment also includes a material roll and a diaphragm buffer mechanism, wherein: the diaphragm buffer mechanism is located between the material roll and the coating assembly, the diaphragm buffer mechanism is used to receive and buffer the diaphragm delivered from the material roll, and the diaphragm buffer mechanism delivers the buffered diaphragm to the coating mechanism; after a pair of pressing knife mechanisms close to the picking assembly on the stacking table press the continuous diaphragm segment, when the coating assembly approaches the pressing knife mechanism pressing the diaphragm, the diaphragm buffer mechanism is also used to recover the un-tensioned diaphragm between the stacking table and the coating assembly.

[0021] The diaphragm buffer mechanism can be used to deliver the diaphragm received for buffering to the coating assembly, or the redundant diaphragms between the coating assembly and the stacking table can be pulled in for buffering. This prevents the diaphragm between the coating assembly and the stacking table (especially the diaphragm laid on the stacking table) from becoming wrinkled or too loose, thereby affecting the quality of the battery cell stacking.

[0022] According to some examples of the first aspect of the present application, the diaphragm buffer mechanism includes a first guide roller, a second guide roller, a buffer roller and a first driving member, wherein:

[0023] The first guide roller, the second guide roller and the buffer roller are arranged in parallel, and the diaphragm fed out of the material roll passes through the first guide roller, the buffer roller and the second guide roller in sequence and is then fed to the laminating assembly, the buffer roller is located between the first guide roller and the second guide roller, and the first driving member is used to drive the buffer roller to slide back and forth in the horizontal direction;

[0024] The first driving member drives the buffer roller to move toward a side away from the laminating assembly to buffer the diaphragm;

[0025] The first driving member drives the buffer roller to move toward the side close to the film laminating assembly to release the diaphragm.

[0026] When the distance between the coating assembly and the stacking platform changes, the first driving member drives the buffer roller to move to buffer and release the diaphragm, so that the length of the diaphragm between the coating assembly and the stacking platform can be adjusted in time, thereby ensuring that the diaphragm between the coating assembly and the stacking platform is tensioned and wrinkle-free.

[0027] According to some examples of the first aspect of the present application, the picking assembly includes a clamping member and a second driving member, wherein: a clearance groove for the clamping member to extend into is opened on the stacking table; the clamping member is used to clamp the battery cell, and the second driving member is used to drive the clamping member to extend into the clearance groove of the stacking table and clamp the battery cell.

[0028] The battery core can be clamped stably and conveniently by providing a clearance groove on the stacking table and using the second driving member to drive the clamping member to extend into the clearance groove.

[0029] According to some examples of the first aspect of the present application, after the stacking table receives the topmost battery electrode, when two pressing knife mechanisms near the folded part of the diaphragm press the two side edges of the battery electrode, the force-applying ends of the pressing knife mechanisms avoid the clearance groove.

[0030] By utilizing the avoidance groove at the force-applying end of the knife pressing mechanism, it is possible to avoid interference between the movement of the clamping member and the knife pressing mechanism when the clamping member clamps the battery cell, thereby preventing the handling of the battery cell from being affected.

[0031] In a second aspect, an example of the present application provides a method for producing a battery cell, comprising the following steps:

[0032] Laying the i-th layer of separator from the first side of the stacking platform to the second side of the stacking platform on the supporting surface of the stacking platform, laying the i-th battery electrode sheet on the i-th layer of separator, and pressing the i-th battery electrode sheet on the stacking platform;

[0033] Lay the i+1th layer of separator from the second side of the stacking platform to the first side of the stacking platform, lay the i+1th battery electrode sheet on the i+1th layer of separator, release the pressing action on the i-th battery electrode sheet, and press the i+1th battery electrode sheet on the stacking platform,

[0034] Continue to perform the above steps until the battery cell is stacked;

[0035] The stacked cells are moved away from the stacking table along the moving direction. During the process of moving the cells away, the continuous diaphragm section behind the top diaphragm of the cells is laid on the stacking table.

[0036] The continuous diaphragm segment is pressed down near one end of the battery cell to be moved away, and the uppermost diaphragm of the battery cell is cut off from the continuous diaphragm segment. The pressed continuous diaphragm segment is used as the first diaphragm of the next battery cell to be stacked.

[0037] The battery cell production method provided by the present application is that after the battery cell is formed by stacking, the battery cell is moved away from the stacking table, and during the removal process, the continuous diaphragm segment behind the top diaphragm of the battery cell is laid on the stacking table, and the end of the continuous diaphragm segment on the stacking table close to the battery cell is always pressed, so as to ensure that when the diaphragm is cut between the top diaphragm of the battery cell and the continuous diaphragm segment, the continuous diaphragm segment is laid on the stacking table. Therefore, when the battery cell is prepared in a cycle, the stacking operation of the next battery cell can directly start the stacking action of the battery pole piece without the need to first perform additional diaphragm traction and laying operations. Thereby, the continuity of the connection of adjacent battery cell processing operations is higher, and the rhythm of the stacking operation is faster.

[0038] According to some examples of the second aspect of the present application, when the laying direction of the diaphragm on the topmost battery electrode sheet of the battery cell formed on the stacking table is the same as the moving direction, a pair of pressing knife mechanisms close to the moving direction press the two side edges of the diaphragm on the topmost battery electrode sheet, and lay the last layer of diaphragm on the diaphragm on the topmost battery electrode sheet, so that the extension direction of the last layer of diaphragm is opposite to the moving direction of the picking component, and the picking component moves the battery cell away from the stacking table along the moving direction.

[0039] After the first layer of diaphragm is formed on the last battery electrode of the battery cell with the same laying direction as the battery cell moving direction, two pressing knife mechanisms close to the folded part of the diaphragm press the two side edges of the diaphragm, and fold the diaphragm to form a second layer of diaphragm on the first layer of diaphragm. In this way, the extension direction of the second layer of diaphragm (i.e. the last layer of diaphragm) is opposite to the moving direction of the picking-up component, so as to facilitate the picking-up component to move the battery cell from the stacking table to the side away from the coating component.

[0040] According to some examples of the second aspect of the present application, when the laying direction of the diaphragm on the topmost battery electrode of the battery cell formed on the stacking table is opposite to the moving direction of the picking component, the picking component moves the battery cell away from the stacking table along the moving direction.

[0041] When the laying and extending direction of the diaphragm on the topmost battery electrode sheet is opposite to the direction of the battery cell being removed, the battery cell can be directly removed from the stacking table.

[0042] According to some examples of the second aspect of the present application, the diaphragm is laid on the stacking table through the film covering assembly, and the film cutting mechanism is located outside the side of the film covering assembly pointing to the picking assembly.

[0043] The film cutting mechanism is arranged outside the side of the film covering component pointing to the picking-up component, and when the battery cell is moved away from the side of the film covering component, it is convenient for the film cutting mechanism to cut the diaphragm.

[0044] According to some examples of the second aspect of the present application, when the film cutting mechanism and the coating assembly are moved by the same driving assembly, after the first layer of diaphragm of the next battery cell is pressed against the stacking table, the driving assembly needs to drive the film cutting mechanism and the coating assembly to move to the connection between the last layer of diaphragm of the previous battery cell and the first layer of diaphragm of the next battery cell. At this time, the first layer of diaphragm of the next battery cell needs to be partially retracted to the incoming material during the movement of the coating assembly.

[0045] The film cutting mechanism and the film coating assembly are moved by the same driving assembly, which improves the utilization rate and integration of the structural components. Compared with the additional independent film cutting mechanism and film coating assembly, this method saves the redundant setting and space occupation of similar components (such as the mounting seat and the related mechanism for driving the movement of the mounting seat). In addition, the first layer of the diaphragm of the next battery cell needs to be partially returned to the incoming material during the movement of the film coating assembly. In this way, the diaphragm between the film coating assembly and the stacking table (especially the diaphragm laid on the stacking table) is prevented from wrinkling or being too loose, which affects the quality of the battery cell stacking.

[0046] According to some examples of the second aspect of the present application, the diaphragm is laid on the stacking table through the film coating assembly, and at least one of the film coating assembly and the stacking table can reciprocate in the horizontal direction.

[0047] At least one of the coating assembly and the stacking table can reciprocate in the horizontal direction, so that the membrane can be folded in coordination with the action of the knife pressing mechanism pressing the membrane and the positive electrode sheet and the negative electrode sheet can be alternately received on the folded membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic structural diagram of a battery cell processing device provided in an embodiment of the present application at a first viewing angle;

[0049] Figure 2 A schematic diagram of the structure of the film laminating assembly 200 and the film cutting mechanism 500 provided in an embodiment of the present application;

[0050] Figure 3 A schematic structural diagram of the stacking assembly 300 provided in an embodiment of the present application at a second viewing angle;

[0051] Figure 4 A schematic diagram of the structure of the pickup assembly 400 provided in an embodiment of the present application at a third viewing angle;

[0052] Figure 5A and Figure 5B The process of preparing the battery cell is shown in the figure;

[0053] Fig. 6A It shows that the laying direction of the diaphragm 100 on the topmost battery core electrode of the battery cell is opposite to the moving direction of the pickup assembly 400; Figure 6B Indicated Fig. 6A A schematic diagram of a battery cell being moved away from the stacking platform 310;

[0054] Fig. 7A It shows that the laying direction of the diaphragm 100 on the topmost battery core electrode of the battery cell is the same as the moving direction of the pickup assembly 400; Figure 7B Indicated in Fig. 7A The last layer of diaphragm is formed on the diaphragm of the medium cell; Figure 7C Indicated Figure 7B Schematic diagram of the battery cell being moved away from the stacking table 310.

[0055] In the figure:

[0056] 100, diaphragm; 110, continuous diaphragm segment;

[0057] 200, laminating assembly; 210, mounting seat; 220, transmission roller;

[0058] 300, stacking platform assembly; 310, stacking platform; 311, clearance slot; 320, knife pressing mechanism; 321, force application end;

[0059] 400, pickup assembly; 410, clamping member; 420, second driving member;

[0060] 500, film cutting mechanism;

[0061] 600, cache mechanism; 610, first guide roller; 620, second guide roller; 630, cache roller. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0063] According to the relevant technology of lithium battery cell preparation, the cell is formed by stacking multiple layers of battery pole pieces and the separators between adjacent pole pieces, and each round of stacking operation can form a single cell, and after the continuous separator is cut, the cell and the separator transmitted by the coating assembly are separated to prepare an independent cell, and then the cell is transported, glued, etc. are applied. In the current related technology, the separator is cut off, causing the separator to separate from the stacking table. Therefore, when stacking the next cell, it is often necessary to re-pull the separator and lay it on the stacking table before stacking the battery pole pieces and bending the separator.

[0064] In view of this, in the embodiment of the present application, after the previous battery cell is stacked to form a battery cell, the picking assembly moves the battery cell from the stacking table to the side away from the coating assembly, and during the moving process, the continuous diaphragm segment behind the top layer of diaphragm of the battery cell is laid on the stacking table, and a pair of pressing knife mechanisms on the stacking table close to the picking assembly always press the continuous diaphragm segment to ensure that after the film cutting mechanism cuts the diaphragm, a layer of diaphragm is directly laid on the stacking table so that the stacking of battery electrodes can be started directly when preparing the next battery cell.

[0065] See below Figure 1 , Figure 2 , Figure 3 and Figure 4 , and combined with FIG. 5A to FIG. 7C As shown, the battery cell processing equipment of the embodiment of the present application is further described.

[0066] The battery core processing equipment includes a film covering component 200, a stacking component 300, a pickup component 400 and a film cutting mechanism 500, wherein:

[0067] The stacking platform assembly 300 includes a stacking platform 310 and a pressing knife mechanism 320. The stacking platform 310 is arranged below the film coating assembly 200. The stacking platform 310 is used to receive the diaphragm 100 laid in the horizontal direction and the battery electrode sheet placed on the diaphragm 100. Based on this, it can be understood that the stacking platform 310 has a bearing surface for receiving the diaphragm 100 and the battery electrode sheet, and the bearing surface is usually horizontal; and the stacking platform 310 has two ends along the horizontal direction (combined with Figure 1 , Figure 3 and Figure 5A , Figure 5B The left and right ends of the diaphragm 100 are each provided with a pair of knife pressing mechanisms 320. The pair of knife pressing mechanisms 320 located at the same end include two knife pressing mechanisms 320 arranged on both sides of the stacking platform 310 opposite to each other. The two pairs of knife pressing mechanisms 320 are used to press the laid battery pole pieces in turn, and each time the end where the diaphragm 100 is to be folded (such as Figure 5A As shown on the right side, and Figure 5BThe two pressing knife mechanisms 320 at the left end (shown in the figure) perform a pressing action, and the two pressing knife mechanisms 320 slide inward from the opposite side and step forward, so that the two sides of the battery electrode sheet are finally pressed by the force-applying ends 321 of the two pressing knife mechanisms 320;

[0068] The film coating assembly 200 is used to transport and guide the diaphragm 100 continuously fed from the material roll to the stacking table 310, and lay it on the stacking table 310;

[0069] At least one of the film coating assembly 200 and the stacking platform 310 can be driven to reciprocate in the horizontal direction. After the stacking platform 310 receives a battery electrode sheet on the diaphragm 100 each time, the stacking platform 310 and the film coating assembly 200 are relatively reciprocated so that the stacking platform 310 is alternately located on both sides of the film coating assembly 200. For ease of understanding, the alternation achieved by this reciprocating movement can be referred to Figure 5A and Figure 5B As shown, the relative position of the stacking table 310 and the laminating assembly 200 is shown in FIG. Figure 5A Change to Figure 5B Then by Figure 5B Change to Figure 5A This reciprocating movement is coordinated with the pressing action performed by the knife pressing mechanism 320. Based on this coordination, the diaphragm 100 is folded and laid on the topmost battery electrode sheet, and the battery electrode sheet and the diaphragm 100 are folded in this way until the battery cell (such as Fig. 6A and Fig. 7A The battery electrode of the present application includes a negative electrode and a positive electrode, and during the folding process of the diaphragm 100, the stacking platform 310 usually alternately receives the negative electrode (e.g. Figure 5A and Figure 5B left side) and the positive electrode (e.g. Figure 5A and Figure 5B on the right side of the folded membrane 100;

[0070] The pick-up assembly 400 is provided with a sliding structure, so that it can realize reciprocating movement in the horizontal direction. The pick-up assembly 400 moves the battery cell formed on the stacking table 310 away from the stacking table 310 to a side away from the coating assembly 200 along the moving direction (exemplarily, in combination with Figure 1 In the position state shown in FIG. 1 , the pick-up assembly 400 moves the battery cell to the left side of the stacking platform 310. In the process of the pick-up assembly 400 moving the battery cell, the continuous diaphragm section 110 (refer to FIG. 1 ) behind the top diaphragm of the battery cell Figure 6B or Figure 7C ) are laid on a stacking table 310;

[0071] A pair of knife pressing mechanisms 320 (combined with Figure 1 , Figure 3 and Figure 6B and Figure 7C The left end of the stacking table 310 shown in the figure presses the continuous diaphragm segment 110, and the film cutting mechanism 500 cuts the diaphragm 100 along the side of the pressing knife mechanism 320 close to the picking assembly 400, and the pressed continuous diaphragm segment 110 serves as the first layer diaphragm 100 of the next battery cell to be stacked.

[0072] Based on the above battery cell processing equipment, the coating assembly 200, the stacking table 310 and the knife pressing mechanism 320 cooperate to stack the sheets until the stacking forms a battery cell, and the picking assembly 400 moves the battery cell from the stacking table 310 to the side away from the coating assembly 200, and in the process of moving away, the continuous diaphragm segment 110 of the rear of the top diaphragm of the battery cell is laid on the stacking table 310, and the pair of knife pressing mechanisms 320 on the stacking table 310 close to the picking assembly 400 always press the continuous diaphragm segment 110, so as to ensure that when the film cutting mechanism 500 cuts the diaphragm 100 along the side of the knife pressing mechanism 320 close to the picking assembly 400, a layer of diaphragm 100 (i.e., the continuous diaphragm segment 110) is laid on the stacking table 310. Therefore, when the battery cell is prepared in a cycle, the stacking (stacking) operation of the next battery cell can directly start the stacking action of the battery pole sheet without the need to perform additional diaphragm 100 pulling and laying operations first. As a result, the connection between adjacent battery cell processing operations is more continuous and the stacking operation is faster.

[0073] About the separator 100 on the top battery core electrode

[0074] The continuous diaphragm 100 is transferred by the film covering assembly 200 and guided to the stacking table 310 for laying. Therefore, when the battery cells are stacked to the top battery pole sheet, the laying extension direction of the diaphragm 100 laid on the top battery pole sheet will determine the position of the film covering assembly 200 (relative to the stacking table 310), thereby affecting the battery cell removal action of the pickup assembly 400. Figure 5A and Figure 5B As shown, the laying extension direction refers to the extension direction from the beginning to the end of the diaphragm 100 when the continuous diaphragm 100 is laid on the stacking table 310, and the diaphragm 100 at the end is usually directly connected to the covering assembly 200, wherein Figure 5A The illustrated diaphragm 100 is laid out and extended from left to right on the top battery electrode sheet. Figure 5A The schematic diaphragm laying extension direction is from right to left. Specific examples are further described below.

[0075] When the laying direction of the separator 100 on the topmost battery cell electrode sheet of the battery cell formed on the stacking table 310 is opposite to the moving direction of the pickup assembly 400 (refer to Fig. 6A As shown), refer to Figure 6BAs shown, the pick-up assembly 400 directly moves the battery cell away from the stacking platform 310 along the moving direction. It can be understood that the laying extension direction of the diaphragm 100 on the uppermost battery electrode sheet is opposite to the moving direction of the pick-up assembly 400, and the film covering assembly 200 and other structures will not affect the cell moving action of the pick-up assembly 400. Therefore, the pick-up assembly 400 can be directly used to move the battery cell away from the stacking platform 310 to the side away from the film covering assembly 200.

[0076] When the laying direction of the separator 100 on the topmost battery cell electrode sheet of the battery cell formed on the stacking platform 310 is the same as the moving direction of the pickup assembly 400 (refer to Fig. 7A As shown in the figure, the film covering assembly 200 and other structures will affect the cell removal action of the pickup assembly 400. For this reason, the embodiment of the present application proposes that a pair of knife pressing mechanisms 320 close to the pickup assembly 400 press the two sides of the diaphragm 100 on the topmost battery cell pole piece, and the relative reciprocating movement of the stacking table 310 and the film covering assembly 200 cooperates with the pressing action of the knife pressing mechanism 320, and based on the cooperation, the last layer of diaphragm is folded on the diaphragm 100 on the topmost battery cell pole piece. Figure 7B As shown, the extension direction of the last layer of the diaphragm is opposite to the removal direction of the pickup assembly 400, and the pickup assembly 400 is then used to move the battery cell away from the stacking platform 310 along the removal direction (refer to Figure 7C In other words, after forming the first layer of diaphragm on the last battery electrode sheet of the battery cell in the same laying direction as the moving direction of the pick-up assembly 400, the pressing action of the knife pressing mechanism 320 is coordinated with the relative reciprocating movement of the stacking platform 310 and the film covering assembly 200 to fold and form the second layer of diaphragm on the first layer of diaphragm, so that the extension direction of the second layer of diaphragm (i.e., the last layer of diaphragm) is opposite to the moving direction of the pick-up assembly 400, so that the pick-up assembly 400 can move the battery cell away from the stacking platform 310 to the side away from the film covering assembly 200.

[0077] At least one of the laminating assembly 200 and the stacking table 310 may be reciprocally movable

[0078] Combination Figure 5A and Figure 5BAs shown, when the battery cell processing equipment is folding, laying and placing the diaphragm 100 in a cycle, the structural components involved need to maintain a certain space. For example, when the stacking table 310 receives the battery pole piece (positive electrode piece or negative electrode piece), the stacking table 310 and the film covering component 200 need to maintain a certain distance in the horizontal direction. Therefore, at least one of the two moves back and forth in the horizontal direction, and the stacking table 310 moves and the film covering component 200 is fixed, or the film covering component 200 moves and the stacking table 310 is fixed, or the stacking table 310 and the film covering component 200 move synchronously. The purpose of keeping a certain distance between the stacking table 310 and the film covering component 200 in the horizontal direction can be achieved, and they are all suitable for the cyclic operation of the battery cell processing equipment. As for the specific examples of the above three relative movements, their differences are compared and introduced below.

[0079] Taking the stacking platform 310 moving and the film covering assembly 200 being fixed as an example, when the stacking platform 310 receives the battery electrode sheet (negative electrode sheet) on the left side of the film covering assembly 200, the distance between the stacking platform 310 and the film covering assembly 200 is S, and when the stacking platform 310 receives the battery electrode sheet (positive electrode sheet) on the right side of the film covering assembly 200, the distance between the stacking platform 310 and the film covering assembly 200 is also S. Therefore, the distance of the stacking platform 310 moving one way between the battery electrode sheet receiving positions on both sides is 2S. If the film covering assembly 200 is moving and the stacking platform 310 is fixed as an example, the distance of the film covering assembly moving one way is also the same.

[0080] Compared with the aforementioned single movement mode, the stacking platform 310 and the coating assembly 200 both move in the horizontal direction, and the movement paths of the stacking platform 310 and the coating assembly 200 are shortened a lot. This relative movement takes the stacking platform 310 and the coating assembly 200 moving in opposite directions in the horizontal direction at the same time as an example. The distance that the stacking platform 310 and the coating assembly 200 move individually is S, that is, when the stacking platform 310 receives the battery electrode (positive electrode or negative electrode), the distance between the stacking platform 310 and the coating assembly 200 in the horizontal direction is S. Therefore, relative to the situation where the stacking platform 310 moves and the coating assembly 200 is fixed, the movement path of the stacking platform 310 of the present application is shortened by half. Relative to the situation where the coating assembly 200 moves and the stacking platform 310 is fixed, the movement path of the coating assembly 200 of the present application is shortened by half.

[0081] Regarding the film laminating assembly 200 and the film cutting mechanism 500

[0082] Combination Figure 1 and Figure 2As shown, the film coating assembly 200 is used as a receiving material roll to deliver the continuous diaphragm 100, and its structure for supporting the continuous diaphragm 100 for transmission and guidance may include a mounting seat 210 and a transmission roller 220. The transmission roller 220 may be arranged on the mounting seat 210 in pairs, and a gap is formed between the two pairs of transmission rollers 220. The gap is used to transmit the diaphragm 100 along one direction, and the diaphragm 100 is guided to the stacking table 310 and stacked with the battery pole piece after passing through the gap. In order to save the redundant setting and space occupation of similar components (such as the mounting seat 210 and the related mechanism driving the mounting seat 210 to move), in the specific implementation, the film cutting mechanism 500 can also be arranged on the mounting seat 210, and the film cutting mechanism 500 can be arranged on one side of the transmission roller 220 so as to be liftable. The film cutting mechanism 500 is arranged in this way, after a pair of knife pressing mechanisms 320 on the stacking table 310 close to the picking assembly 400 press the continuous diaphragm segment 110, the coating assembly 200 and the stacking table 310 move relatively to the coating assembly 200 being near the knife pressing mechanism 320 pressing the diaphragm 100, and the film cutting mechanism 500 descends and cuts the diaphragm 100 along the side of the knife pressing mechanism 320 close to the picking assembly 400. In this embodiment, the relative movement of the coating assembly 200 and the stacking table 310 can refer to one of the relative movement methods described in the previous example, and because the film cutting mechanism 500 is arranged on the mounting seat 210 of the coating assembly 200 and is adjacent to the side of the transmission roller 220, the film cutting mechanism 500 cuts the diaphragm 100 as the coating assembly 200 moves relative to the stacking table 310 (for example, at least one of the coating assembly 200 and the stacking table 310 moves), thereby improving the utilization rate and integration of the structural components. Compared with the additional independent arrangement of the film cutting mechanism 500 and the coating assembly 200, this method saves the redundant arrangement and space occupation of similar components.

[0083] About the caching and release of the diaphragm 100

[0084] Reference Figure 5A , Figure 5B , Fig. 6A , Figure 6B , Fig. 7A , Figure 7B and Figure 7C As shown, during the battery cell preparation process, the distance between the coating group and the stacking table 310 changes dynamically. When this distance change occurs, for example, when the distance changes from large to small, if the redundant diaphragm 100 between the coating assembly 200 and the stacking table 310 is not pulled back for buffering in time, the diaphragm 100 will become wrinkled or too loose, which will affect the cycle preparation operation of the battery cell and reduce the quality of the battery cell.

[0085] To this end, in some embodiments of the present application, the battery cell processing equipment also includes a material roll and a diaphragm buffer mechanism 600, wherein: the diaphragm buffer mechanism 600 is located between the material roll and the coating assembly 200, the diaphragm buffer mechanism 600 is used to receive and buffer the diaphragm delivered from the material roll, and the diaphragm buffer mechanism 600 delivers the buffered diaphragm to the coating mechanism. With this arrangement, when the distance between the coating assembly 200 and the stacking table 310 changes, the diaphragm length between the stacking table 310 and the coating assembly 200 can be adjusted in time with the help of the diaphragm buffer mechanism 600. Exemplarily, when the distance between the laminating assembly 200 and the stacking table 310 changes from large to small, the length of the diaphragm in the diaphragm buffer mechanism 600 changes from short to long, that is, the redundant diaphragm caused by the change in the distance between the laminating assembly 200 and the stacking table 310 is pulled back to the cache, and when the distance between the laminating assembly 200 and the stacking table 310 changes from small to large, the length of the diaphragm in the diaphragm buffer mechanism 600 changes from long to short, that is, the cached diaphragm is released to be transmitted between the laminating assembly 200 and the stacking table 310. In short, the diaphragm received and cached can be sent to the laminating assembly 200 by using the diaphragm buffer mechanism 600, and the redundant diaphragm between the laminating assembly 200 and the stacking table 310 can also be pulled back for cache. After a pair of pressing knife mechanisms 320 near the picking assembly 400 on the stacking table 310 press the continuous diaphragm segment 110, when the coating assembly 200 approaches the pressing knife mechanism 320 pressing the diaphragm, the diaphragm buffer mechanism 600 thus configured is also used to recover the untensioned diaphragm between the stacking table 310 and the coating assembly 200, which helps to prevent the diaphragm between the coating assembly 200 and the stacking table 310 (especially the diaphragm laid on the stacking table 310) from becoming wrinkled or too loose, thereby affecting the quality of the battery cell stacking.

[0086] Exemplarily, the membrane buffer mechanism 600 includes a first guide roller 610, a second guide roller 620, a buffer roller 630 and a first driving member (not shown in the figure), wherein: the first guide roller 610, the second guide roller 620 and the buffer roller 630 are arranged in parallel, and the membrane fed out of the roll passes through the first guide roller 610, the buffer roller 630 and the second guide roller 620 in sequence and is then sent to the laminating assembly 200, the buffer roller 630 is located between the first guide roller 610 and the second guide roller 620, and the first driving member (not shown in the figure) is used to drive the buffer roller 630 to slide back and forth in the horizontal direction; the first driving member (not shown in the figure) drives the buffer roller 630 to move to the side away from the laminating assembly 200 (such as FIG. 5A to FIG. 7C The buffer roller 630 moves from the left side to the right side, and the length of the membrane passing through the first guide roller 610, the buffer roller 630 and the second guide roller 620 becomes longer after the movement, so that the membrane can be buffered; the first driving member (not shown in the figure) drives the buffer roller 630 to move toward the side close to the laminating assembly 200 (such as FIG. 5A to FIG. 7CAs shown in the figure, the buffer roller 630 moves from the right side to the left side), and the length of the membrane passing through the first guide roller 610, the buffer roller 630 and the second guide roller 620 becomes shorter after the movement, so that the previously buffered membrane can be released and transmitted to the transmission roller 220 of the laminating assembly 200. When the distance between the laminating assembly 200 and the stacking platform changes, the first driving member (not shown in the figure) drives the buffer roller 630 to move to buffer and release the membrane, so that the length of the membrane between the laminating assembly 200 and the stacking platform 310 can be adjusted in time, so as to ensure that the membrane between the laminating assembly 200 and the stacking platform 310 is tensioned without wrinkles.

[0087] About picking up batteries

[0088] In some embodiments of the present application, the pickup assembly 400 includes a clamping member 410 and a second driving member 420, wherein: Figure 3 As shown, a clearance groove 311 for the clamping member 410 to extend into is provided on the stacking platform 310; the clamping member 410 is used to clamp the battery cell, and the second driving member 420 is used to drive the clamping member 410 to extend into the clearance groove 311 of the stacking platform 310 and clamp the battery cell (combined with Figure 1 , Figure 3 and Figure 4 As shown in the figure, a clearance groove 311 is provided on the stacking platform 310 to provide a movement space for the clamping member 410 to extend into. After the clamping member 410 extends into the clearance groove 311, the battery cell is clamped again by a supporting and clamping action that is vertical to the battery cell. In this way, the battery cell can be clamped stably and conveniently, which helps to prevent the battery cell from tipping over.

[0089] Continue to combine Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments of the present application, after the stacking table 310 receives the topmost battery electrode, when the two pressing knife mechanisms 320 near the folded portion of the diaphragm 100 press the two sides of the battery electrode, the force-applying end of the pressing knife mechanism 320 avoids the clearance groove 311. By utilizing the force-applying end of the pressing knife mechanism 320 to avoid the clearance groove 311, it is possible to avoid interference between the movement of the clamping member 410 and the pressing knife mechanism 320 when the clamping member 410 clamps the battery cell, thereby affecting the transportation of the battery cell.

[0090] About the battery cell production method

[0091] The present application also discloses a battery cell production method, which can be understood as the application of relevant battery cell processing equipment (including but not limited to the battery processing equipment described in the above embodiment) in the battery cell cycle preparation process. Figure 5A , Figure 5B , Fig. 6A , Figure 6B , Fig. 7A , Figure 7B and Figure 7C , and combined with Figures 1 to 4 As shown, the battery cell production method of the embodiment of the present application is further described.

[0092] The battery cell production method comprises the following steps:

[0093] Step S1: Refer to Figure 5A As shown, the i-th layer of the diaphragm 100 is placed from the first side edge (eg Figure 5A The left side of the stacking platform 310 (as shown in the figure) is directed to the second side of the stacking platform 310 (as shown in the figure) Figure 5A The battery electrode sheet is laid on the support surface of the stacking platform 310, and the ith battery electrode sheet is laid on the ith layer of the diaphragm 100, and the ith battery electrode sheet is pressed on the stacking platform 310. For example, two pressing knife mechanisms 320 close to the second side of the stacking platform 310 can be used to perform a pressing action, such as sliding and stepping from the opposite side to the support surface of the stacking platform 310, so that the two sides of the battery electrode sheet are finally pressed;

[0094] Step S2: Refer to Figure 5B As shown, the i+1th layer of the diaphragm 100 is placed from the second side edge (eg Figure 5B The right side of the stacking platform 310 (as shown in the figure) is toward the first side of the stacking platform 310 (as shown in the figure) Figure 5B The left side of the schematic orientation) is laid on the stacking table 310, the i+1th battery electrode sheet is laid on the i+1th layer of the separator 100, the pressing action on the i-th battery electrode sheet is released, and the i+1th battery electrode sheet is pressed on the stacking table 310. Exemplarily, the pressing action can be performed by using two pressing knife mechanisms 320 close to the first side of the stacking table 310, for example, sliding and stepping from the opposite side to the bearing surface of the stacking table 310, and finally the two sides of the battery electrode sheet are pressed;

[0095] Steps S1 to S2 are executed cyclically as above. In specific implementation, the stacking table 310 and the coating assembly 200 are relatively reciprocated so that the stacking table 310 is alternately located on both sides of the coating assembly 200. When the stacking table 310 is located on one side of the coating assembly 200, the diaphragm 100 is laid from the first side of the stacking table 310 to the second side of the stacking table 310 on the bearing surface of the stacking table 310 and receives the battery pole piece and triggers the knife pressing mechanism 320 to perform corresponding actions. When the stacking table 310 is located on the other side of the coating assembly 200, the diaphragm 100 is laid from the second side of the stacking table 310 to the first side of the stacking table 310 on the stacking table 310 and receives the battery pole piece and triggers the knife pressing mechanism 320 to perform corresponding actions until the stacking forms a battery cell.

[0096] Step S3: Refer to Figure 6B , Figure 7CAs shown, the stacked battery cells are moved away from the stacking platform 310 along the moving direction. In the process of moving the battery cells away, the continuous diaphragm section 110 behind the top diaphragm 100 of the battery cells is laid on the stacking platform 310;

[0097] Step S4: Refer to Figure 6B , Figure 7C , and combined with Figure 1 and Figure 4 As shown, the knife pressing mechanism 320 is used to press the end of the continuous diaphragm segment 110 close to the battery cell to be removed (combined with Figure 1 , Figure 3 , Figure 5 and Figure 6B and Figure 7C The left end of the stacking platform 310 is shown in the figure), and the film cutting mechanism 500 is used to cut off the top layer of the separator of the battery cell and the continuous separator section 110, and the pressed continuous separator section 110 is used as the first layer of the separator of the next battery cell to be stacked.

[0098] In the battery cell production method provided by the present application, during the process of removing the battery cell from the stacking table 310, the continuous diaphragm segment 110 behind the top diaphragm 100 of the battery cell is laid on the stacking table 310, and the end of the continuous diaphragm segment 110 on the stacking table 310 close to the battery cell is always pressed down, thereby ensuring that when the diaphragm 100 is cut between the top diaphragm 100 of the battery cell and the continuous diaphragm segment 110, the continuous diaphragm segment 110 is laid on the stacking table 310. Therefore, when the battery cell is prepared in a cycle, the stacking operation of the next battery cell can directly start the stacking action of the battery pole piece without first entering the additional diaphragm 100 traction and laying operation. Thereby, the continuity of the connection of adjacent battery cell processing operations is higher, and the rhythm of the stacking operation is faster.

[0099] Similar to the embodiment of the battery cell processing equipment described above, when the battery cells are stacked to the topmost battery pole piece, the laying extension direction of the diaphragm 100 laid on the topmost battery pole piece will determine the position of the film covering assembly 200 (relative to the stacking table 310), thereby affecting the battery cell removal action of the pickup assembly 400. The laying extension direction refers to the extension direction from the beginning to the end of the diaphragm 100 when the continuous diaphragm 100 is laid on the stacking table 310, and the diaphragm 100 at the end is usually directly connected to the film covering assembly 200. Specifically, it is further described in conjunction with the following examples.

[0100] Reference Fig. 6A As shown, when the laying direction of the diaphragm 100 on the topmost battery cell electrode sheet of the battery cell formed on the stacking platform 310 is opposite to the moving direction of the pick-up assembly 400, the pick-up assembly 400 directly moves the battery cell away from the stacking platform 310 along the moving direction (as shown in FIG. Figure 6BAs shown). It can be understood that the laying and extending direction of the diaphragm 100 on the topmost battery electrode sheet is opposite to the moving direction of the pick-up assembly 400, and the film covering assembly 200 and other structures will not affect the cell moving action of the pick-up assembly 400. Therefore, the pick-up assembly 400 can be directly used to move the cell from the stacking platform 310 to the side away from the film covering assembly 200.

[0101] When the laying direction of the diaphragm 100 on the topmost battery cell electrode sheet of the battery cell formed on the stacking platform 310 is the same as the moving direction of the pickup assembly 400 (e.g. Fig. 7A As shown in FIG. 1 , the embodiment of the present application proposes that a pair of pressing knife mechanisms 320 close to the moving direction press the two sides of the diaphragm 100 on the uppermost battery electrode sheet, and lay the last diaphragm 100 on the diaphragm 100 on the uppermost battery electrode sheet, so that the extension direction of the last diaphragm 100 is opposite to the moving direction of the pickup assembly 400 (as shown in FIG. 1 ). Figure 7B Then, refer to Figure 7C As shown, the battery cell is moved away from the stacking table 310 along the moving direction by using the pick-up assembly 400. In other words, after the first layer of diaphragm 100 is formed on the last battery electrode of the battery cell in the same laying direction as the moving direction of the pick-up assembly 400, the pressing action of the knife pressing mechanism 320 is coordinated with the relative reciprocating movement of the stacking table 310 and the film covering assembly 200 to fold and form a second layer of diaphragm on the first layer of diaphragm, so that the extension direction of the second layer of diaphragm (i.e., the last layer of diaphragm) is opposite to the moving direction of the pick-up assembly 400, so that the pick-up assembly 400 can move the battery cell away from the stacking table 310 to the side away from the film covering assembly 200.

[0102] According to some examples of the second aspect of the present application, the diaphragm 100 is laid on the stacking table 310 through the film covering assembly 200, and the film cutting mechanism 500 is located outside the side of the film covering assembly 200 pointing to the picking assembly 400, referring to Figure 1 and Figure 2 As shown, when the battery cell is moved away from the coating assembly 200 , it is convenient for the film cutting mechanism 500 to cut the diaphragm 100 .

[0103] In some embodiments, the film cutting mechanism 500 and the film covering assembly 200 are moved by the same driving assembly. Figure 1 and Figure 2As shown, the utilization rate and integration of structural components are improved in this way. Compared with the additional independent film cutting mechanism 500 and coating assembly 200, this method saves the redundant setting and space occupation of similar components (such as the mounting seat 210 and the related mechanism for driving the mounting seat 210 to move). In this example, after the first layer of diaphragm 100 of the next battery cell is pressed against the stacking table 310, the driving assembly needs to drive the film cutting mechanism 500 and the coating assembly 200 to move to the connection between the last layer of diaphragm of the previous battery cell and the first layer of diaphragm of the next battery cell. At this time, the first layer of diaphragm of the next battery cell needs to be partially retracted to the incoming material during the movement of the coating assembly 200. In this way, the diaphragm 100 between the coating assembly 200 and the stacking table 310 (especially the diaphragm 100 laid on the stacking table 310) is prevented from being wrinkled or too loose, thereby affecting the quality of the battery cell stack.

[0104] In this embodiment, the diaphragm 100 is laid on the stacking table 310 through the coating assembly 200. The relative movement of the coating assembly 200 and the stacking table 310 can be based on similar reasons and in accordance with the relative movement method described in the previous example of the battery cell processing equipment implementation. That is, at least one of the coating assembly 200 and the stacking table 310 can move back and forth in the horizontal direction, so that the diaphragm 100 can be folded in coordination with the action of the pressing mechanism 320 pressing the diaphragm 100 and the positive electrode sheets and the negative electrode sheets can be alternately received on the folded diaphragm 100.

[0105] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0106] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present application and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present application.

[0107] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0108] Although multiple embodiments of the present application have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art can think of many changes, modifications and alternatives without departing from the thought and spirit of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments of the present application described herein can be adopted. The attached claims are intended to limit the scope of protection of the present application, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A battery core processing equipment, characterized in that: The battery core processing equipment includes a film coating assembly, a stacking table, a knife pressing mechanism, a pickup assembly and a film cutting mechanism, wherein: The film covering assembly is used to guide and lay the continuous diaphragms onto the stacking platform; The stacking platform is arranged below the film coating assembly, and is used to receive the laid diaphragms and battery pole pieces. A pair of knife pressing mechanisms are arranged at both ends of the stacking platform in the horizontal direction, and the two knife pressing mechanisms of each pair of knife pressing mechanisms are arranged oppositely on both sides of the stacking platform, and the two pairs of knife pressing mechanisms are used to press the laid battery pole pieces in turn; At least one of the coating assembly and the stacking platform can be driven to reciprocate in the horizontal direction, and after the stacking platform receives a battery electrode sheet each time, the stacking platform and the coating assembly move back and forth relative to each other to fold the diaphragm and lay it on the uppermost battery electrode sheet until the battery cell is stacked to form a battery cell; The picking assembly can reciprocate in the horizontal direction, and the picking assembly moves the battery cell formed on the stacking table away from the stacking table to a side away from the coating assembly along the moving direction. In the process of the picking assembly moving the battery cell away, the continuous diaphragm section behind the top diaphragm of the battery cell is laid on the stacking table; A pair of knife pressing mechanisms on the stacking table close to the pickup assembly press the continuous diaphragm segment, and the film cutting mechanism cuts the diaphragm along one side of the knife pressing mechanism close to the pickup assembly, and the pressed continuous diaphragm segment serves as the first layer diaphragm of the next battery cell to be stacked.

2. The battery core processing equipment according to claim 1, characterized in that: When the laying direction of the diaphragm on the topmost battery electrode sheet of the battery cell formed on the stacking table is the same as the moving direction of the picking assembly, a pair of knife pressing mechanisms close to the picking assembly presses the two side edges of the diaphragm on the topmost battery electrode sheet, and the stacking table and the coating assembly move back and forth relative to each other to fold and form the last diaphragm on the diaphragm on the topmost battery electrode sheet, so that the extension direction of the last diaphragm is opposite to the moving direction of the picking assembly, and the picking assembly moves the battery cell away from the stacking table along the moving direction; or, When the laying direction of the diaphragm on the uppermost battery electrode sheet of the battery cell formed on the stacking platform is opposite to the moving direction of the picking-up assembly, the picking-up assembly moves the battery cell away from the stacking platform along the moving direction.

3. The battery core processing equipment according to claim 1, characterized in that: The film laminating assembly comprises a mounting seat and a transmission roller, the transmission roller and the film cutting mechanism are both arranged on the mounting seat, and the film cutting mechanism is arranged on one side of the transmission roller in a liftable manner, and the transmission roller is used to transmit the continuous diaphragm to the stacking table; After a pair of knife pressing mechanisms near the pick-up assembly on the stacking table press the continuous diaphragm segment, the film coating assembly moves to the vicinity of the knife pressing mechanism pressing the diaphragm, and the film cutting mechanism descends and cuts the diaphragm along a side of the knife pressing mechanism close to the pick-up assembly; Alternatively, after a pair of knife pressing mechanisms on the stacking table close to the picking assembly press the continuous diaphragm segment, the stacking table moves to the bottom of the coating assembly so that the film cutting mechanism is located outside the knife pressing mechanism pressing the diaphragm, and the film cutting mechanism cuts the diaphragm downwards.

4. The battery core processing equipment according to claim 1, characterized in that: The battery core processing equipment also includes a material roll and a diaphragm buffer mechanism, wherein: The membrane buffer mechanism is located between the material roll and the film coating assembly, and is used to receive and buffer the membrane delivered from the material roll, and the membrane buffer mechanism delivers the buffered membrane to the film coating assembly; After a pair of knife pressing mechanisms on the stacking table close to the picking assembly press the continuous diaphragm segment, when the coating assembly approaches the knife pressing mechanism pressing the diaphragm, the diaphragm buffer mechanism is also used to recover the untensioned diaphragm between the stacking table and the coating assembly.

5. The battery core processing equipment according to claim 4, characterized in that: The diaphragm buffer mechanism comprises a first guide roller, a second guide roller, a buffer roller and a first driving member, wherein: The first guide roller, the second guide roller and the buffer roller are arranged in parallel, the diaphragm fed out of the material roll passes through the first guide roller, the buffer roller and the second guide roller in sequence and then is fed to the laminating assembly, the buffer roller is located between the first guide roller and the second guide roller, and the first driving member is used to drive the buffer roller to slide back and forth in the horizontal direction; The first driving member drives the buffer roller to move toward a side away from the laminating assembly to buffer the diaphragm; The first driving member drives the buffer roller to move toward a side close to the film covering assembly to release the diaphragm.

6. The battery core processing equipment according to claim 1, characterized in that: The pickup assembly comprises a clamping member and a second driving member, wherein: The stacking table is provided with a clearance groove for the clamping member to extend into; The clamping member is used for clamping the battery core, and the second driving member is used for driving the clamping member to extend into the clearance groove of the stacking platform and clamp the battery core.

7. The battery core processing equipment according to claim 6, characterized in that: After the stacking platform receives the topmost battery electrode sheet, when the two pressing knife mechanisms close to the folded portion of the diaphragm press the two side edges of the battery electrode sheet, the force-applying ends of the pressing knife mechanisms avoid the clearance grooves.

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