Preparation device and preparation method of battery cell structure

Abstract

The invention provides a preparation device and a preparation method of a battery cell structure. The preparation device of the battery cell structure comprises a diaphragm transmission structure and a pole piece transmission structure, the pole piece conveying structure is provided with two discharging areas respectively corresponding to a first pole piece and a second pole piece in the pole pieces, and the two discharging areas are respectively arranged on two opposite sides in the thickness direction of the diaphragm; a pole piece transferring mechanism is arranged between each discharging area and the diaphragm conveying structure, and is used for transferring and pressing the corresponding pole piece at a preset position of the diaphragm, so that first pole pieces and second pole pieces are distributed on the two sides of the diaphragm in the thickness direction in a staggered manner, and folding positions are formed between the adjacent first pole pieces and second pole pieces; and a bearing piece is arranged below the discharging end of the diaphragm conveying structure and is used for bearing the diaphragm which is at least partially compounded with the pole piece, so that the diaphragm compounded with the pole piece can be folded on the bearing piece along the folding position in a Z shape at least under the action of gravity, and the production efficiency of the battery cell structure is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular to a preparation device and a preparation method of a battery core structure. Background Art

[0002] Lithium-ion batteries are widely used in portable devices such as mobile phones and laptops. For example, laminated lithium-ion batteries include battery cells. Among them, in the production and processing of laminated lithium-ion batteries, the battery cell stacking process is a very important processing step, which has a vital impact on the quality and production efficiency of the entire battery.

[0003] In the related technology, when stacking battery cells, the positive and negative electrode sheets are usually cut, and then hot-compounded with the separator by roller pressing into a whole. Finally, they are cut into individual stacking units, and the stacking units are stacked manually to produce battery cells, which results in low production efficiency of the battery cells. Summary of the invention

[0004] In view of this, the embodiments of the present invention are directed to providing a device for preparing a battery cell structure and a method for preparing the same, so as to improve the production efficiency of the battery cell structure to a certain extent.

[0005] In a first aspect, the present invention provides a device for preparing a battery cell structure, comprising a membrane transmission structure for at least transmitting a membrane in the battery cell structure and a pole piece transmission structure for transmitting a pole piece in the battery cell structure;

[0006] The electrode piece transmission structure has two discharge areas respectively corresponding to the first electrode piece and the second electrode piece of the electrode pieces, and the two discharge areas are arranged on two opposite sides in the thickness direction of the diaphragm;

[0007] A pole piece transfer mechanism is provided between each of the discharge areas and the diaphragm transmission structure, and the pole piece transfer mechanism is used to transfer and press the corresponding pole piece to a preset position of the diaphragm, so that the first pole piece and the second pole piece are alternately distributed on both sides of the diaphragm in the thickness direction, and a folding position is formed between adjacent first pole pieces and second pole pieces;

[0008] A supporting member is provided below the discharge end of the diaphragm transmission structure, and the supporting member is used to support at least part of the diaphragm compounded with the pole piece, so that the diaphragm compounded with the pole piece can at least be folded in a Z shape along the folding position on the supporting member under the action of gravity.

[0009] Optionally, the pole piece transfer mechanism includes a connected moving part and a connection pressing structure;

[0010] The connecting and pressing structure can be pre-connected with at least the pole piece at the discharge area; the moving part is used to drive the connecting and pressing structure to reciprocate between the corresponding discharge area and the diaphragm, so as to transfer and press the pole piece from the corresponding discharge area to the preset position through the connecting and pressing structure.

[0011] Optionally, the connection and pressing structure further includes a telescopic member and a connecting member that can be pre-connected with the pole piece;

[0012] The telescopic member is connected between the moving member and the connecting member to at least drive the connecting member to move toward the direction close to the preset position to press the pole piece onto the diaphragm, or drive the connecting member to move toward the direction away from the preset position to separate the connecting member from the diaphragm.

[0013] Optionally, the connecting member includes a first adsorption member;

[0014] The first adsorption member is used for adsorption pre-connection with the pole piece at the corresponding discharge area.

[0015] Optionally, a first air hole connected to the outside is formed on the first adsorbent; the connecting member further comprises a first suction member connected to the first air hole, so that the first adsorbent can adsorb the electrode when the first suction member draws air;

[0016] And / or, the size of the area where the first adsorption member is provided is not less than the outer contour size of the first pole piece and the second pole piece;

[0017] And / or, the connecting member further includes a pressing member connected between the first adsorption member and the telescopic member; a projection of the first adsorption member on the pressing member is located within an area enclosed by an outer contour of the pressing member.

[0018] Optionally, the connection and pressing structure further includes a heating element;

[0019] The adhesive portion on the diaphragm can be softened under the heating effect of the heating element to adhere the pole piece to the diaphragm.

[0020] Optionally, the connecting member has a receiving cavity, the heating member is located in the receiving cavity, and is thermally connected to the cavity wall of the receiving cavity;

[0021] The outer contour of the heating element is adapted to the size of the accommodating cavity; and / or the heating element and the cavity wall of the accommodating cavity are detachably connected; and / or the connecting member comprises a first adsorption member and a pressing member connected in a thermally conductive manner; the pressing member is detachably connected between the first adsorption member and the telescopic member, and the pressing member has the accommodating cavity.

[0022] Optionally, there are at least two connecting and pressing structures;

[0023] At least two of the connection pressing structures are arranged at intervals along the circumference of the moving part and move synchronously with the moving part.

[0024] Optionally, each of the electrode piece transmission structures includes a conveying structure located at a corresponding discharge area;

[0025] The conveying structure is provided with a fixing component, and the fixing component is used to pre-connect the pole piece to the conveying structure before the pole piece transfer mechanism transfers the pole piece.

[0026] Optionally, the fixing assembly includes a second adsorption member; the second adsorption member is used to adsorb and pre-connect the pole piece before the pole piece transfer mechanism transfers the pole piece;

[0027] The second adsorbent is provided with a second air hole connected to the outside, and the fixing assembly further comprises a second suction member connected to the second air hole, and the second adsorbent can adsorb the electrode when the second suction member draws air;

[0028] And / or, the conveying structure includes at least two transmission members arranged at intervals along a preset direction and an annular conveying member arranged around the outer circumference of each transmission member portion.

[0029] Optionally, there are at least two first pole pieces and at least two second pole pieces, and each of the first pole pieces and each of the second pole pieces are connected in sequence;

[0030] The manufacturing device of the battery cell structure further includes a first cutting piece corresponding to the first pole piece and a second cutting piece corresponding to the second pole piece; the first cutting piece is used to cut two adjacent first pole pieces, and the second cutting piece is used to cut two adjacent second pole pieces;

[0031] The first cutting member is located in the area defined on both sides of the length direction of the corresponding fixing assembly, and the first cutting member is located on the upstream side of the pole piece transfer mechanism;

[0032] The second cutting member is located in an area defined on both sides in the length direction of the corresponding fixing component, and the second cutting member is located on the upstream side of the pole piece transfer mechanism.

[0033] Optionally, the diaphragm transmission structure includes two pressed components;

[0034] The pressing assembly corresponds to the pole piece transfer mechanism one by one and is located at the downstream side of the corresponding pole piece transfer mechanism; the pressing assembly has a gap for the diaphragm combined with the pole piece to pass through, and can press the pole piece and the diaphragm when the diaphragm passes through;

[0035] And / or, a first deviation-correcting structure is further provided on the transmission path of the diaphragm transmission structure; the first deviation-correcting structure is located on the upstream side of the corresponding pole piece transfer mechanism, and is used to detect the position of the diaphragm relative to the diaphragm transmission structure, so as to adjust the position of the diaphragm at least when the position of the diaphragm is offset;

[0036] And / or, a second correction structure is also arranged on the transmission path of the pole piece transmission structure; the second correction structure is located on the upstream side of the corresponding pole piece transfer mechanism, and is used to detect the position of the pole piece relative to the pole piece transmission structure, so as to adjust the position of the corresponding pole piece at least when the position of the pole piece is offset.

[0037] Optionally, the supporting member includes a bottom wall and a side blocking wall;

[0038] The side baffle is connected to the bottom wall and extends upward in a direction away from the bottom wall; the bottom wall is used to support at least a portion of the diaphragm with the electrode sheet;

[0039] There are two side baffles, which are arranged opposite to each other, and the difference between the distance between the two side baffles and the distance between two adjacent folding positions is not greater than a preset threshold.

[0040] In a second aspect, the present invention provides a method for preparing a battery cell structure using the above-mentioned battery cell structure preparation device, the method comprising:

[0041] transporting the diaphragm;

[0042] Transferring the pole piece to the discharge area;

[0043] The electrode sheets at the corresponding discharge area are transferred to the preset position of the diaphragm, so that the first electrode sheets and the second electrode sheets are alternately distributed on both sides of the diaphragm in the thickness direction, and a folding position is formed between adjacent first electrode sheets and second electrode sheets, so that the diaphragm compounded with the electrode sheets can be folded in a Z shape along the folding position on the supporting member at least under the action of gravity.

[0044] Optionally, before the step of transferring the electrode piece at the corresponding discharge area to the preset position of the diaphragm, the method further includes:

[0045] cutting the two first pole pieces connected to each other;

[0046] Cut the two connected second pole pieces.

[0047] The preparation device and preparation method of the battery cell structure provided by the present invention, by setting a diaphragm transmission structure and a pole piece transmission structure, the pole piece transmission structure has two discharge areas corresponding to the first pole piece and the second pole piece respectively, and the two discharge areas are arranged on two opposite sides in the thickness direction of the diaphragm, and a pole piece transfer mechanism is set between each discharge area and the diaphragm transmission structure, so that the pole piece transfer mechanism is used to transfer and press the corresponding pole piece to a preset position of the diaphragm, so that the first pole piece and the second pole piece are staggered on both sides in the thickness direction of the diaphragm, and a folding position is formed between adjacent first pole pieces and second pole pieces, so that the first pole piece and the second pole piece can be directly formed on both sides of the isolation membrane. Compared with the solution that requires the diaphragm to be cut in advance and then the first pole piece and the second pole piece are connected to the cut diaphragm, this can save the production process of the battery cell structure to a certain extent, which is beneficial to improving the production efficiency of the battery cell structure, and can also avoid the situation that the diaphragm is scrapped due to accidental pulling and skewing during cutting of the diaphragm to a certain extent, and reduce the consumables of the diaphragm to a certain extent.

[0048] At the same time, by arranging a supporting member below the discharge end of the diaphragm transmission structure, the supporting member is used to support at least a part of the diaphragm composited with the electrode sheet, so that the diaphragm composited with the electrode sheet can at least be folded in a Z shape along the folding position on the supporting member under the action of gravity. That is to say, the diaphragm composited with the electrode sheet can be automatically folded under its own gravity and the supporting action of the supporting member. Compared with the scheme of pre-folding the diaphragm in a Z shape to form a pre-crease on the diaphragm, and then correspondingly arranging the first electrode sheet and the second electrode sheet on the diaphragm, the arrangement of the present invention can improve the efficiency of battery cell stacking to a certain extent, ensure the production capacity of the battery cell structure, and no other third-party tools, such as folding pins, are required during the stacking process, so that the production equipment of the entire battery cell structure is simple, and it is conducive to simplifying the process of battery cell stacking. In addition, this can also avoid the situation where third-party tools damage structures such as the diaphragm composited with the first electrode sheet and the second electrode sheet to a certain extent, thereby helping to improve the quality of the battery cell structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic structural diagram of a device for preparing a battery core structure according to an embodiment of the present invention;

[0050] Figure 2 It is a structural schematic diagram of a pole piece transfer mechanism according to an embodiment of the present invention;

[0051] Figure 3 It is a structural schematic diagram of a conveying structure and a fixing assembly according to an embodiment of the present invention;

[0052] Figure 4It is a schematic diagram of the structure corresponding to when the first pole piece and the second pole piece according to an embodiment of the present invention are pressed onto the diaphragm;

[0053] Figure 5 The figure is a schematic flow chart of a method for preparing a battery cell structure according to an embodiment of the present invention.

[0054] Among them, 100, battery cell structure; 101, diaphragm; 102, pole piece; 1021, first pole piece; 1022, second pole piece; 103, folding position; 1, diaphragm transmission structure; 11, pressing assembly; 12, diaphragm unwinding member; 13, second transmission member; 14, supporting member; 2, pole piece transmission structure; 20, discharge area; 21, conveying structure; 211, transmission member; 212, transmission member; 2121, annular space; 22, fixing assembly; 221, second suction member; 222, The second adsorption member; 23, the pole piece unwinding member; 24, the first transmission member; 3, the pole piece transfer mechanism; 31, the moving member; 32, the connecting and pressing structure; 321, the telescopic member; 322, the connecting member; 3221, the first adsorption member; 3222, the pressing member; 323, the heating member; 4, the supporting member; 41, the bottom wall; 42, the side baffle wall; 5, the first cutting member; 6, the second cutting member; 7, the first deviation correction structure; 8, the second deviation correction structure; 9, the laser; 10, the unloading mechanism; 1001, the cutter. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0056] A laminated battery, such as a laminated lithium battery, includes a cell structure, and the cell structure includes a positive electrode sheet, a negative electrode sheet, and a separator. Specifically, the positive electrode sheet, the separator, the negative electrode sheet, and the separator are sequentially laminated from bottom to top along the thickness direction of the separator to form a composite stack of the cell structure, and the composite stack is immersed in an electrolyte and packaged to obtain a laminated battery.

[0057] The positive electrode sheet includes a positive electrode current collector and a positive electrode active layer disposed on the surface of the positive electrode current collector. The negative electrode sheet includes a negative electrode current collector and a negative electrode active layer disposed on the surface of the negative electrode current collector. The capacity of the battery is provided by the electrochemical reaction between the active material of the positive electrode active layer and the active material of the negative electrode active layer. The separator is located between the positive electrode sheet and the negative electrode sheet to isolate the positive electrode sheet from contact with the negative electrode sheet.

[0058] Related technology When stacking battery cells, it is usually necessary to cut the positive electrode sheet and the negative electrode sheet, and then composite the first electrode sheet and the second electrode sheet on the diaphragm respectively after cutting, and finally cut the composite whole into single stacking units, and then stack the single stacking units to form a composite stack to produce a battery cell structure, which results in low production efficiency of the battery cells.

[0059] Based on this, the present embodiment provides a preparation device and a preparation method of a battery cell structure, in which the diaphragm is transmitted through a diaphragm transmission structure, the first electrode piece and the second electrode piece are transmitted through a electrode piece transmission structure, and the electrode pieces on the electrode piece transmission structure are correspondingly transferred to the diaphragm through two electrode piece transfer mechanisms, and the first electrode piece and the second electrode piece transferred to the diaphragm are arranged alternately on both sides of the diaphragm, and a folding position is formed between two adjacent first electrode pieces and second electrode pieces, and a supporting member is provided below the discharge end of the diaphragm transmission structure, so that the diaphragm compounded with the first electrode piece and the second electrode piece can be folded in a Z shape along the folding position on the supporting member under its own gravity and the supporting action of the supporting member, thereby improving the production efficiency of the battery cell structure to a certain extent.

[0060] The following is a detailed description of the preparation device and preparation method of the battery cell structure provided by the embodiment of the present invention through specific embodiments in conjunction with the accompanying drawings:

[0061] Reference Figures 1 to 5 As shown, this embodiment provides a preparation device for a battery cell structure, which is used to produce a battery cell structure 100. The battery cell structure 100 is specifically a laminated battery cell. The battery cell structure 100 is applied to a battery, and the battery may be a lithium-ion battery.

[0062] The cell structure 100 includes a diaphragm 101 and a pole piece 102 . The pole piece 102 includes a first pole piece 1021 and a second pole piece 1022 . One of the first pole piece 1021 and the second pole piece 1022 may be a positive pole piece, and the other of the first pole piece 1021 and the second pole piece 1022 may be a negative pole piece.

[0063] Specifically, the preparation device of the battery cell structure includes a membrane transmission structure 1 for transmitting at least the membrane 101 and a pole piece transmission structure 2 for transmitting the pole piece 102 .

[0064] The electrode piece transmission structure 2 has two discharge areas 20 corresponding to the first electrode piece 1021 and the second electrode piece 1022, respectively. The two discharge areas 20 are arranged on opposite sides of the thickness direction of the diaphragm 101. Figure 4 Z direction shown.

[0065] Reference Figures 1 to 4As shown, a pole piece transfer mechanism 3 is provided between each discharge area 20 and the diaphragm transmission structure 1, and the pole piece transfer mechanism 3 is used to transfer and press the corresponding pole piece 102 to a preset position of the diaphragm 101, so that the first pole pieces 1021 and the second pole pieces 1022 are alternately distributed on both sides in the thickness direction of the diaphragm 101, and a folding position 103 is formed between adjacent first pole pieces 1021 and second pole pieces 1022.

[0066] For example, in the actual production process of the battery cell structure 100, the electrode sheet transmission structure 2 transmits the first electrode sheet 1021 and the second electrode sheet 1022, and the diaphragm transmission structure 1 transmits the diaphragm 101. For example, when the first electrode sheet 1021 and the second electrode sheet 1022 are transmitted to the corresponding discharge area 20, the electrode sheet transfer mechanism 3 can transfer the corresponding electrode sheet 102 from the discharge area 20 to a preset position on the diaphragm 101, so that the first electrode sheet 1021 and the second electrode sheet 1022 are arranged alternately on both sides of the thickness direction of the diaphragm 101, and at the same time, a folding position 103 is formed between adjacent first electrode sheets 1021 and second electrode sheets 1022. For details, please refer to Figure 4 shown.

[0067] The folding position 103 is the gap between the adjacent first pole piece 1021 and the second pole piece 1022, and the gap can be used as a bending portion when the diaphragm 101 compounded with the first pole piece 1021 and the second pole piece 1022 is folded in a Z-shape, so as to facilitate the stacking of the first pole piece 1021 and the second pole piece 1022 separated by the diaphragm 101. Specifically, the size of the folding position 103 can match the thickness of the first pole piece 1021 and the second pole piece 1022.

[0068] In specific implementation, the transfer and pressing of the first pole pieces 1021 and the second pole pieces 1022 at corresponding positions of the diaphragm 101 can be controlled by adjusting the transmission rate or transmission time of the first pole pieces 1021 and the second pole pieces 1022 according to the sizes of the different battery cell structures 100, so as to realize the staggered arrangement of the first pole pieces 1021 and the second pole pieces 1022 on both sides of the diaphragm 101, and form a folding position 103 between adjacent first pole pieces 1021 and second pole pieces 1022.

[0069] The diaphragm 101 may have a pre-coated adhesive portion, which may be a composite adhesive. When the electrode 102 (the first electrode 1021 or the second electrode 1022) corresponding to the electrode transfer mechanism 3 is transferred to the preset position of the diaphragm 101, the electrode 102 can be attached to the diaphragm 101 through the adhesive portion under the compression of the electrode 102 transfer structure to achieve the connection between the two.

[0070] In specific implementation, a supporting member 4 is provided below the discharge end of the diaphragm transmission structure 1, and the supporting member 4 is used to support at least a portion of the diaphragm 101 compounded with the pole piece 102, so that the diaphragm 101 compounded with the pole piece 102 can at least be folded in a Z shape on the supporting member 4 along the folding position 103 under the action of gravity.

[0071] For example, as the transmission action of the diaphragm transmission structure 1 proceeds, after the pole piece 102 is pressed onto the diaphragm 101, the diaphragm 101 will continue to be transmitted until the portion of the diaphragm 101 pressed with the pole piece 102 is transmitted to the supporting member 4. At this time, after the portion of the diaphragm 101 contacts the supporting member 4, it can be folded in a Z shape along the folding position 103 on the supporting member 4 under at least its own gravity, so as to realize the first pole piece 1021, the diaphragm 101, the second pole piece 1022, the diaphragm 101 or the second pole piece 1022. The sheet 1022, the diaphragm 101, the first pole piece 1021, and the diaphragm 101 are stacked in sequence, thereby realizing the automatic stacking of the diaphragm 101, which is beneficial to improving the stacking efficiency, thereby improving the production efficiency of the battery cell structure 100, and since there is no intervention of the folding ejector during the stacking process, the stacking process can also be simplified, and the diaphragm 101 composited with the first pole piece 1021 and the second pole piece 1022 is protected to a certain extent, thereby ensuring the quality of the battery cell structure 100.

[0072] Reference Figure 1 As shown, the preparation device of the battery cell structure can also include two lasers 9, which correspond to the first pole piece 1021 and the second pole piece 1022 respectively, and are used to cut the corresponding pole ears, so as to facilitate the subsequent connection of the cut pole ears to the corresponding first pole piece 1021 or the second pole piece 1022.

[0073] For example, continue to refer to Figure 1 The manufacturing device of the battery structure may further include a material unloading mechanism 10, a cutter 1001 and a glue-applying mechanism (not shown in the figure). The material unloading mechanism 10 can at least unload the diaphragm 101 stacked on the supporting member 4 and compounded with the first pole piece 1021 and the second pole piece 1022. The cutter 1001 is arranged between the downstream end of the diaphragm transmission structure 1 and the supporting member 4 to cut off the diaphragm 101.

[0074] Exemplarily, when the number of electrode sheets 102 compounded on the diaphragm 101 is enough for the battery cell structure 100 of 1EA, the electrode sheet transport structure 2 stops unwinding, and the electrode sheet transfer mechanism 3 at the discharge area 20 stops compounding the electrode sheets 102, until about 4-5 electrode sheets 102 are compounded. Among them, the unloading structure may include unloading jaws and a gluing mechanism, and the unloading jaws clamp the diaphragm 101 compounded with the electrode sheets 102 stacked on the supporting member 4, and rotate it so that the part of the diaphragm 101 that is not compounded with the electrode sheets 102 is wrapped around the outside of the diaphragm compounded with the electrode sheets 102, and then the diaphragm 101 is cut by the cutter 1001, and the end of the diaphragm 101 is glued by the gluing mechanism, and finally the bare battery cell can flow out.

[0075] The preparation device of the battery core structure provided in the present embodiment is provided with a diaphragm transmission structure 1 and a pole piece transmission structure 2, so that the pole piece transmission structure 2 has two discharge areas 20 corresponding to the first pole piece 1021 and the second pole piece 1022 respectively, and the two discharge areas 20 are arranged on two opposite sides in the thickness direction of the diaphragm 101, and a pole piece transfer mechanism 3 is arranged between each discharge area 20 and the diaphragm transmission structure 1, so that the pole piece transfer mechanism 3 is used to transfer and press the corresponding pole piece 102 to a preset position of the diaphragm 101, so that the first pole piece 1021 and the second pole piece 1022 are staggered on both sides in the thickness direction of the diaphragm 101, and A folding position 103 is formed between adjacent first pole pieces 1021 and second pole pieces 1022, so that staggered first pole pieces 1021 and second pole pieces 1022 can be directly formed on both sides of the isolation membrane. Compared with the solution that requires pre-cutting the diaphragm and then connecting the first pole piece and the second pole piece to the cut diaphragm, this can save the production process of the battery cell structure 100 to a certain extent, which is beneficial to improving the production efficiency of the battery cell structure 100, and can also avoid the situation where the diaphragm 101 is scrapped due to accidental pulling or skewing during cutting, thereby reducing the consumables of the diaphragm 101 to a certain extent.

[0076] At the same time, by arranging a supporting member 4 below the discharge end of the diaphragm transmission structure 1, the supporting member 4 is used to support at least a portion of the diaphragm 101 compounded with the pole piece 102, so that the diaphragm 101 compounded with the pole piece 102 can at least be folded in a Z shape along the folding position 103 on the supporting member 4 under the action of gravity. That is to say, the diaphragm 101 compounded with the pole piece 102 can be automatically folded under its own gravity and the supporting action of the supporting member 4, compared with pre-folding the diaphragm in a Z shape to form a pre-crease on the diaphragm, and then arranging the first pole piece and the corresponding pole piece on the diaphragm. The scheme of the second pole piece, the arrangement of this embodiment can improve the efficiency of battery cell stacking to a certain extent, ensure the production capacity of the battery cell structure 100, and no other third-party tools, such as folding ejectors, are required during the stacking process, so that the production equipment of the entire battery cell structure 100 is simple, and it is helpful to simplify the process of battery cell stacking. In addition, this can also avoid the situation where third-party tools damage structures such as the diaphragm 101 composited with the first pole piece 1021 and the second pole piece 1022 to a certain extent, thereby helping to improve the quality of the battery cell structure 100.

[0077] Reference Figure 1 As shown, the electrode sheet transmission structure 2 may further include an electrode sheet unwinding member 23 for unwinding the first electrode sheet 1021 and the second electrode sheet 1022. The discharge area 20 is located at the downstream side of the electrode sheet unwinding member 23, and at least two first transmission members 24 for conveying the corresponding electrode sheets 102 are arranged between the electrode sheet unwinding member 23 and each discharge area 20.

[0078] In this way, the pole piece 102 can be transferred to the discharge area 20 through the cooperation of the pole piece unwinding member 23 and the first transmission member 24, so that the transmission of the pole piece 102 is realized, and the transmission process is simple and convenient.

[0079] Among them, refer to Figure 1 As shown, among all the first transmission members 24 located between the pole piece unwinding member 23 and each discharging area 20, at least two first transmission members 24 are located at different heights.

[0080] In this way, the first transmission member 24 with a height difference can ensure the balance of tension of the electrode 102 on its transmission path, thereby avoiding the loosening and misalignment of the electrode 102 to a certain extent, which is beneficial to ensure the accuracy of the position of the electrode 102 when it is pasted on the diaphragm 101 and ensure the quality of the battery cell structure 100.

[0081] For example, refer to Figure 1 As shown, there are two electrode unwinding members 23 , which correspond one-to-one to the first electrode 1021 and the second electrode 1022 , and there are at least two of the above-mentioned first transmission members 24 between each electrode unwinding member 23 and the corresponding discharge area 20 .

[0082] The first transmission member 24 may be a first transmission roller.

[0083] Reference Figure 1 As shown, the membrane transmission structure 1 may include a membrane unwinding member 12 for unwinding the membrane 101. At least two second transmission members 13 for conveying the membrane 101 are arranged between the membrane unwinding member 12 and the discharge end of the membrane transmission structure 1.

[0084] In this way, the diaphragm 101 can be transported through the cooperation of the diaphragm unwinding member 12 and the second transport member 13, and the transport process is simple and convenient.

[0085] Among all the second transmission members 13, at least two of the second transmission members 13 are located at different heights. In this way, the second transmission members 13 with height differences can ensure the balance of tension of the diaphragm 101 on its transmission path, thereby avoiding the slack and misalignment of the diaphragm 101 to a certain extent, which is conducive to further ensuring the quality of the battery cell structure 100.

[0086] Exemplarily, the second transmission member 13 may be a second transmission roller.

[0087] In some embodiments, reference Figure 1 and Figure 2 As shown, the pole piece transfer mechanism 3 includes a connected moving part 31 and a connection pressing structure 32. The connection pressing structure 32 can be pre-connected with at least the pole piece 102 at the discharge area 20. The moving part 31 is used to drive the connection pressing structure 32 to reciprocate between the corresponding discharge area 20 and the diaphragm 101, so as to transfer and press the pole piece 102 from the corresponding discharge area 20 to a preset position through the connection pressing structure 32.

[0088] The above-mentioned movement may be rotation or translation, etc. For example, when the moving part 31 drives the connection pressing structure 32 to rotate, the moving part 31 may be a rotary motor or a crank slider mechanism, etc.

[0089] In this way, the moving part 31 can be controlled to work so that the connecting pressing structure 32 moves between the discharge area 20 and the diaphragm 101, so that the corresponding pole piece 102 can be transferred from the discharge area 20 and pressed to the preset position of the diaphragm 101, and the composite connection of the pole piece 102 at the corresponding position can be achieved, which is beneficial to improve the transfer efficiency of the pole piece 102.

[0090] In some embodiments, reference Figure 1 and Figure 2As shown, the connection pressing structure 32 also includes a telescopic member 321 and a connecting member 322 that can be pre-connected with the pole piece 102. The telescopic member 321 is connected between the moving member 31 and the connecting member 322 to at least drive the connecting member 322 to move toward a direction close to a preset position to press the pole piece 102 onto the diaphragm 101, or drive the connecting member 322 to move toward a direction away from the preset position to separate the connecting member 322 from the diaphragm 101.

[0091] In this way, the electrode piece 102 can be pre-connected through the connecting piece 322, and then the connecting piece 322 can be moved by the expansion and contraction of the telescopic piece 321 to apply a holding pressure to the electrode piece 102 in the direction of the diaphragm 101, so as to press the electrode piece 102 tightly against the diaphragm 101, thereby ensuring the adhesion effect of the electrode piece 102 on the diaphragm 101 and ensuring the quality of the battery cell structure 100.

[0092] At the same time, this also makes it easier for the telescopic part 321 to relatively shorten the size of the connecting pressing structure 32 after telescoping, makes it easier for the connecting pressing structure 32 to move under the drive of the moving part 31, and can to a certain extent avoid interference between the connecting pressing structure 32 and other components during movement, thereby ensuring the smoothness of movement and improving the transfer efficiency of the pole piece 102.

[0093] Exemplarily, the telescopic member 321 may be a cylinder, a telescopic rod, or the like.

[0094] Reference Figure 1 As shown, a support member 14 can be respectively provided on the side of each pole piece 102 away from the corresponding pole piece transfer mechanism 3. Through the cooperation between the telescopic member 321 and the support member 14, the telescopic member 321 can be extended to drive the connecting member 322 to apply a holding pressure to the diaphragm 101, thereby further ensuring the adhesion effect of the pole piece 102 on the diaphragm 101.

[0095] In some embodiments, reference Figure 1 and Figure 2 As shown, the connecting member 322 includes a first adsorbing member 3221. The first adsorbing member 3221 is used to perform adsorption pre-connection with the electrode piece 102 at the corresponding discharge area 20.

[0096] In this way, the pre-connection of the pole pieces 102 can be realized while improving the efficiency of the pre-connection of the pole pieces 102 , thereby improving the efficiency of the battery cell stacking and saving labor costs to a certain extent.

[0097] Of course, in other implementations, the connecting member 322 may also be a clamp or the like to clamp the pole piece 102 .

[0098] In some embodiments, a first air hole communicating with the outside is provided on the first adsorbent 3221. The connecting member 322 further includes a first suction member (not shown) communicating with the first air hole, so that the first adsorbent 3221 can adsorb the pole piece 102 when the first suction member draws air.

[0099] In this way, the outside air can be sucked through the first air hole by the suction effect of the first suction member, so as to adsorb the corresponding electrode piece 102 on the first adsorption member 3221, thereby realizing the pre-connection of the electrode piece 102, and the pre-connection process is simple and reliable.

[0100] Exemplarily, the first suction member may be a suction pump, such as a vacuum pump, which can adsorb the pole piece 102 under pressure when evacuating. Of course, the first suction member may also be an air pump.

[0101] Exemplarily, the first adsorbent 3221 may be an adsorbent panel to ensure the adsorption area of ​​the first adsorbent 3221 and the electrode 102, and to ensure the flat adsorption of the electrode 102. In addition, in other implementations, the first adsorbent 3221 may also include at least two suction cups arranged at intervals.

[0102] Exemplarily, there may be at least two first air holes, and the at least two first air holes are arranged at intervals on the first adsorption member 3221 .

[0103] Exemplarily, when the electrode piece 102 is transferred to the corresponding discharge area 20, the first adsorption member 3221 can be pre-connected with the electrode piece 102 under the action of the first suction member, and then the connection pressing structure 32 with the electrode piece 102 adsorbed thereon can be moved to the preset position of the diaphragm 101 under the action of the moving member 31, and then the electrode piece 102 can be pressed at the preset position by the telescopic member 321. At this time, the electrode piece 102 can be adhesively connected to the adhesive portion on the diaphragm 101. After the connection of the electrode piece 102 on the diaphragm 101 is completed, the moving member 31 again drives the connection pressing structure 32 to move to the discharge area 20 to take the electrode piece 102, and so on.

[0104] In some embodiments, the size of the setting area of ​​the first adsorption member 3221 is not less than the outer contour size of the first pole piece 1021 and the second pole piece 1022 .

[0105] This can improve the adsorption effect of the first adsorption component 3221 on the first electrode piece 1021 and the second electrode piece 1022 to a certain extent, thereby avoiding the accidental falling of the electrode piece 102 during the transfer process to a certain extent, which is beneficial to improving the stability and reliability of the pre-connection of the electrode piece 102, so that the electrode piece 102 can be reliably transferred from the discharge area 20 to the preset position.

[0106] In some embodiments, reference Figure 1 and Figure 2 As shown, the connecting member 322 further includes a pressing member 3222 connected between the first adsorption member 3221 and the telescopic member 321. The projection of the first adsorption member 3221 on the pressing member 3222 is located within the area surrounded by the outer contour of the pressing member 3222.

[0107] In this way, the pole piece 102 can be effectively pressed at the preset position corresponding to the diaphragm 101 by the pressing piece 3222, so that the pole piece 102 can be reliably attached to the preset position of the diaphragm 101. In addition, since the projection of the first adsorption member 3221 on the pressing piece 3222 is located in the area surrounded by the outer contour of the pressing piece 3222, while achieving effective pressing, the first adsorption member 3221 can be prevented from being damaged due to stress concentration caused by uneven force to a certain extent, and the first adsorption member 3221 is effectively protected, ensuring the adsorption effect on the pole piece 102.

[0108] Exemplarily, the pressing member 3222 may be a pressing plate, or the pressing member 3222 may be a pressing roller, etc.

[0109] In some embodiments, reference Figure 2 As shown, the connection pressing structure 32 further includes a heating element 323 . The adhesive portion on the diaphragm 101 can be softened under the heating effect of the heating element 323 , so as to bond the pole piece 102 to the diaphragm 101 .

[0110] In this way, the diaphragm 101 pre-coated with the adhesive portion can be preheated by the heating element 323 to soften the adhesive portion on the diaphragm 101. The softened adhesive portion can reliably adhere the electrode 102 to the preset position of the diaphragm 101, which is beneficial to improve the reliability of the electrode being adhered to the diaphragm 101.

[0111] In some embodiments, reference Figure 2 As shown, the connecting member 322 has a receiving cavity, and the heating member 323 is located in the receiving cavity and is thermally connected to the cavity wall of the receiving cavity.

[0112] In this way, the heating element 323 can be protected to a certain extent, thereby preventing the heating element 323 from interfering with surrounding components and being damaged. At the same time, through the heat-conducting contact between the heating element 323 and the cavity wall of the accommodating cavity, compared with the solution where the heating element is located outside the connecting member and can be in direct contact with the diaphragm, this can also prevent the heating element 323 from being damaged by excessive temperature on the diaphragm 101 to a certain extent, that is, this can ensure the bonding effect while protecting the diaphragm 101.

[0113] The heat conductive connection here can be a direct contact heat conductive connection between the heating element 323 and the cavity wall of the accommodating cavity, or a heat conductive element can be provided between the heating element 323 and the cavity wall of the accommodating cavity to indirectly achieve a heat conductive connection between the two.

[0114] Exemplarily, when the connecting member 322 includes a first adsorption member 3221 and a pressing member 3222, the pressing member 3222 may have a accommodating cavity, and the first adsorption member 3221 and the pressing member 3222 are thermally connected so that the heat of the heating member 323 can be transferred to the diaphragm 101 via the pressing member 3222 and the first adsorption member 3221.

[0115] For example, the pressing component 3222 may include two pressing sub-components detachably connected by bolts or the like, and the two pressing sub-components together enclose a receiving cavity.

[0116] Exemplarily, the heating element 323 can be an electromagnet, which heats quickly and is safe to use. Of course, the heating element 323 can also be a heating wire or the like.

[0117] In some embodiments, reference Figure 2 As shown, the outer contour of the heating element 323 is matched with the size of the accommodating cavity.

[0118] In this way, the heating element 323 can be positioned to a certain extent, ensuring the stability of the position of the heating element 323 in the accommodating cavity, thereby facilitating improving the heating effect of the heating element 323 on the diaphragm 101 and improving the pasting efficiency of the electrode piece 102 .

[0119] In some embodiments, the heating element 323 is detachably connected to the cavity wall of the accommodating cavity.

[0120] With this arrangement, when one of the heating element 323 and the connecting element 322 is damaged, the damaged component can be replaced, thereby avoiding the scrapping of the entire heating element 323 and the connecting element 322, which is beneficial to saving maintenance and use costs.

[0121] In some embodiments, the pressing member 3222 is detachably connected between the first adsorption member 3221 and the telescopic member 321 .

[0122] With such arrangement, on the one hand, for first pole pieces 1021 and second pole pieces 1022 of different sizes, the first adsorption piece 3221 and the pressing piece 3222 can be detached to replace the first adsorption piece 3221 and the pressing piece 3222 that are adapted to the sizes of the first pole piece 1021 and the second pole piece 1022, thereby improving the practicability of the preparation device of the battery cell structure; on the other hand, when one of the first adsorption piece 3221, the pressing piece 3222 and the telescopic piece 321 is damaged, the damaged component can be replaced, thereby avoiding the scrapping of the first adsorption piece 3221, the pressing piece 3222 and the telescopic piece 321 as a whole, which is beneficial to saving the maintenance and use costs.

[0123] Exemplarily, the above-mentioned detachable connection can be a bolt connection, or a snap connection, etc.

[0124] In some embodiments, reference Figure 1 and Figure 2 As shown, there are at least two connecting and pressing structures 32. The at least two connecting and pressing structures 32 are arranged at intervals along the circumference of the moving part 31 and move synchronously with the moving part 31.

[0125] This arrangement can improve the transfer efficiency of the pole piece 102 from the discharge area 20 to the diaphragm 101 to a certain extent, thereby improving the preparation efficiency of the entire battery cell structure 100. At the same time, when one of the connection and pressing structures 32 is damaged, other connection and pressing structures 32 can be used to operate, ensuring the normal progress of the entire preparation process.

[0126] In some embodiments, reference Figure 1 and Figure 3 As shown, each electrode sheet transmission structure 2 includes a conveying structure 21 located at the corresponding discharge area 20. A fixing component 22 is provided on the conveying structure 21, and the fixing component 22 is used to pre-connect the electrode sheet 102 to the conveying structure 21 before the electrode sheet transfer mechanism 3 transfers the electrode sheet 102.

[0127] With such an arrangement, when the pole piece 102 is transferred to the conveying structure 21 , the pole piece 102 can be pre-connected and positioned by the fixing component 22 , thereby ensuring the stability of the pole piece 102 before it is transferred by the pole piece transfer mechanism 3 , laying a foundation for the subsequent reliable transfer of the pole piece 102 by the pole piece transfer mechanism 3 .

[0128] In some embodiments, reference Figure 3 As shown, the fixing assembly 22 includes a second adsorption member 222. The second adsorption member 222 is used to adsorb and pre-connect the pole piece 102 before the pole piece transfer mechanism 3 transfers the pole piece 102.

[0129] In this way, the electrode piece 102 can be adsorbed on the second adsorption piece 222 through the suction effect of the second suction piece 221, thereby realizing the pre-connection of the electrode piece 102, and also improving the efficiency of the pre-connection of the electrode piece 102, thereby improving the efficiency of the battery cell stacking and saving labor costs to a certain extent.

[0130] In a specific implementation, when the pole piece 102 is adsorbed by the second adsorption member 222 , the pole piece 102 can be driven by the conveying member 212 and move synchronously with the conveying member 212 .

[0131] In some embodiments, reference Figure 3 As shown, the second adsorbent 222 is provided with a second air hole communicating with the outside, and the fixing assembly 22 further includes a second suction member 221 communicating with the second air hole. The second adsorbent 222 can adsorb the pole piece 102 when the second suction member 221 draws air.

[0132] In this way, the external air can be sucked through the second air hole by the suction effect of the second suction member 221 to adsorb the electrode piece 102 on the second adsorption member 222, thereby achieving pre-connection of the electrode piece 102, and the pre-connection process is simple and reliable.

[0133] Exemplarily, the second suction member 221 may be a suction pump, such as a vacuum pump, which can adsorb the electrode 102 under pressure when evacuating. Of course, the second suction member 221 may also be an air pump.

[0134] Exemplarily, the second adsorbent 222 may be an attachment plate to ensure the adsorption area and adsorption flatness of the second adsorbent 222 to the electrode 102. In addition, in other implementations, the second adsorbent 222 may also include at least two suction cups arranged at intervals.

[0135] For example, there may be at least two second air holes, and the at least two second air holes are arranged at intervals on the second adsorption member 222 .

[0136] Specifically, the manufacturing device of the battery cell structure further includes a back plate, and the second adsorption member 222 can be fixed on the back plate.

[0137] Exemplarily, the projection of the second air hole on the second adsorbent 222 on the conveying member 212 can be located within the area surrounded by the hole wall of the second air hole on the conveying member 212, so that during the conveying process of the conveying member 212, it can be ensured that the electrode 102 can always be adsorbed on the conveying member 212 by the second adsorbent 222.

[0138] In some embodiments, reference Figure 1 and Figure 3As shown, the conveying structure 21 includes at least two transmission members 211 arranged at intervals along a preset direction and an annular conveying member 212 arranged around the outer circumference of each transmission member 211. In this way, the structure of the conveying structure 21 is simple, and the pole piece 102 is convenient to convey.

[0139] Exemplarily, the transmission member 211 can be a transmission wheel, and the transmission member 212 can be a conveyor belt. Of course, the transmission member 211 can also be a transmission sprocket, and the transmission member 212 can be a transmission chain.

[0140] Reference Figure 1 and Figure 3 As shown, the second suction member 221 and the second adsorption member 222 can be located in the annular space 2121 of the conveying member 212 and outside each transmission member 211. In this way, while the electrode 102 is adsorbed, the structure of the entire electrode transmission structure 2 is made compact, which is conducive to saving the space occupied by the electrode transmission structure 2, thereby reducing the volume of the entire battery cell structure preparation device.

[0141] In some embodiments, there are at least two first pole pieces 1021 and second pole pieces 1022, and each first pole piece 1021 and each second pole piece 1022 are connected in sequence. The preparation device of the battery cell structure also includes a first cutting piece 5 corresponding to the first pole piece 1021 and a second cutting piece 6 corresponding to the second pole piece 1022. The first cutting piece 5 is used to cut two adjacent first pole pieces 1021, and the second cutting piece 6 is used to cut two adjacent second pole pieces 1022.

[0142] This arrangement can be used to obtain a corresponding number of first pole sheets 1021 and second pole sheets 1022 by cutting two adjacent first pole sheets 1021 and second pole sheets 1022 according to requirements on energy density, energy storage, etc. of the battery cell structure 100 .

[0143] In the specific implementation, the first pole piece 1021 is taken as an example for explanation. When the first pole piece 1021 on the pole piece transmission structure 2 is transmitted to the corresponding conveying structure 21, the first cutting piece 5 cuts the two adjacent first pole pieces 1021, and then the pole piece transfer mechanism 3 transfers and presses the cut first pole piece 1021, and this process is repeated.

[0144] In some embodiments, reference Figure 1 As shown, the first cutting member 5 is located in the area defined on both sides of the corresponding fixing assembly 22 in the length direction, and the first cutting member 5 is located on the upstream side of the pole piece transfer mechanism 3. Figure 1 and Figure 3 In the X direction.

[0145] In this way, the first cutting piece 5 can be used to cut two adjacent first pole pieces 1021 before the first pole piece 1021 is transferred to the corresponding pole piece transfer mechanism 3, and since the first cutting piece 5 is located in the area defined on both sides of the corresponding fixed component 22, the structure of the first cutting piece 5 and the pole piece transfer structure 2 is compact, which is conducive to the miniaturization of the battery cell structure preparation device.

[0146] In a specific implementation, along the transmission direction of the first pole piece 1021, the length dimension of the fixing assembly 22 corresponding to the first pole piece 1021 is greater than the length dimension of each first pole piece 1021. It can be understood that the transmission direction of the first pole piece 1021 specifically refers to the actual direction of the first pole piece 1021 on the corresponding pole piece transmission structure 2. Taking the transmission of the first pole piece 1021 on the corresponding transmission structure 21 as an example, the transmission direction of the first pole piece 1021 is specifically Figure 1 and Figure 3 In the X direction.

[0147] In this way, after the first cutting piece 5 cuts two adjacent first pole pieces 1021, the first pole piece 1021 located on the upstream side can still be pre-connected by the fixing component 22, thereby avoiding to a certain extent the situation in which the first pole piece 1021 located on the upstream side falls and cannot continue to be transported on the conveying structure 21, thereby ensuring the continuity of the transmission of the first pole piece 1021.

[0148] In some embodiments, reference Figure 1 As shown, the second cutting member 6 is located in the area defined on both sides of the corresponding fixing assembly 22 in the length direction, and the second cutting member 6 is located on the upstream side of the pole piece transfer mechanism 3 .

[0149] In this way, the second cutting piece 6 can be used to cut two adjacent second pole pieces 1022 before the second pole pieces 1022 are transferred to the corresponding pole piece transfer mechanism 3, and since the second cutting piece 6 is located in the area defined on both sides of the corresponding fixed component 22, the structure of the second cutting piece 6 and the pole piece transfer structure 2 is compact, which is conducive to the miniaturization of the battery cell structure preparation device.

[0150] In a specific implementation, along the transmission direction of the second pole piece 1022, the length dimension of the fixing assembly 22 corresponding to the second pole piece 1022 is greater than the length dimension of each second pole piece 1022. The transmission direction of the second pole piece 1022 specifically refers to the actual direction of the second pole piece 1022 on the corresponding pole piece transmission structure 2. Taking the transmission of the second pole piece 1022 on the corresponding conveying structure 21 as an example, the transmission direction of the second pole piece 1022 is specifically Figure 1 and Figure 3 In the X direction.

[0151] Through the above-mentioned arrangement, it is possible to avoid the situation in which the second pole piece 1022 located on the upstream side falls off and cannot continue to be transported on the conveying structure 21 after the second cutting piece 6 cuts two adjacent second pole pieces 1022, thereby ensuring the continuity of the transmission of the second pole piece 1022, which is beneficial to improving the preparation efficiency of the battery cell structure 100.

[0152] In some embodiments, reference Figure 1 As shown, the membrane transmission structure 1 includes two pressing assemblies 11. The pressing assemblies 11 correspond to the pole piece transfer mechanisms 3 one by one and are located at the downstream side of the corresponding pole piece transfer mechanisms 3. The pressing assemblies 11 have a gap for the membrane 101 combined with the pole piece 102 to pass through, and can press the pole piece 102 and the membrane 101 when the membrane 101 passes through.

[0153] With such an arrangement, the diaphragm 101 compounded with the pole piece 102 can be pressed together by the pressing assembly 11 , so as to further improve the compounding effect of the pole piece 102 on the diaphragm 101 .

[0154] For example, refer to Figure 1 As shown, the pressing assembly 11 may include two pressing rollers that can be driven to cooperate with each other, with the above-mentioned gap formed between the two pressing rollers, and when the diaphragm 101 passes through the two pressing rollers, the two pressing rollers that drive each other can press the diaphragm 101.

[0155] Of course, in other implementations, the pressing assembly 11 may also include a conveyor belt and a mating roller that is located above the conveyor belt and can be mated in a transmission manner, and the above-mentioned gap is formed between the conveyor belt and the mating roller.

[0156] In some embodiments, reference Figure 1 As shown, a first deviation correcting structure 7 is also provided on the transmission path of the diaphragm transmission structure 1. The first deviation correcting structure 7 is located on the upstream side of the corresponding pole piece transfer mechanism 3, and is used to detect the position of the diaphragm 101 relative to the diaphragm transmission structure 1, so as to adjust the position of the diaphragm 101 at least when the position of the diaphragm 101 is offset.

[0157] In this way, the position of the diaphragm 101 is detected and corrected by the first deviation-correcting structure 7 to ensure the accuracy of the position of the diaphragm 101 on the diaphragm transmission structure 1, thereby facilitating the accuracy of the position of the pole piece 102 when it is compounded on the diaphragm 101.

[0158] In some embodiments, reference Figure 1 As shown, a second correction structure 8 is also provided on the transmission path of the pole piece transmission structure 2. The second correction structure 8 is located on the upstream side of the corresponding pole piece transfer mechanism 3, and is used to detect the position of the pole piece 102 relative to the pole piece transmission structure 2, so as to adjust the position of the corresponding pole piece 102 at least when the position of the pole piece 102 is offset.

[0159] In this way, the position of the pole piece 102 is detected and corrected by the second correction structure 8 to ensure the accuracy of the position of the pole piece 102 on the pole piece transmission structure 2, which is beneficial to ensure the accuracy of the position of the subsequent pole piece 102 when it is compounded on the diaphragm 101.

[0160] Exemplarily, there may be two second deviation-correcting structures 8 , which correspond one-to-one to the first pole piece 1021 and the second pole piece 1022 .

[0161] The first deflection correcting structure 7 and the second deflection correcting structure 8 may be deflection correctors. Alternatively, the first deflection correcting structure 7 and the second deflection correcting structure 8 may both include a detector and a deflection correcting member, wherein the detector is used to detect the position of the pole piece 102 or the diaphragm 101, and the deflection correcting member is electrically connected to the detector and is used to adjust the position of the pole piece 102 or the diaphragm 101 when the position detected by the detector is incorrect.

[0162] In some embodiments, reference Figure 1 As shown, the supporting member 4 includes a bottom wall 41 and a side wall 42. The side wall 42 is connected to the bottom wall 41 and extends upward in a direction away from the bottom wall 41. The bottom wall 41 is used to support the diaphragm 101 at least partially compounded with the pole piece 102.

[0163] In this way, the diaphragm 101 combined with the pole piece 102 can be effectively stopped and limited by the side retaining wall 42 , which is helpful to improve the stacking neatness, and further improve the lamination quality of the battery cell structure 100 .

[0164] In some embodiments, reference Figure 1 As shown, there are two side baffles 42. The two side baffles 42 are arranged opposite to each other, and the difference between the distance between the two side baffles 42 and the distance between two adjacent folding positions 103 is not greater than a preset threshold.

[0165] This arrangement can further stop and limit the diaphragm 101 composited with the pole piece 102, thereby avoiding to a certain extent the diaphragm 101 composited with the pole piece 102 from becoming loose after being folded on the bottom wall 41, especially when the number of folded layers of the battery cell structure 100 is too many, which can effectively ensure the stacking neatness.

[0166] Exemplarily, the preset threshold value may be set between 0.5 mm and 0.8 mm. For example, the preset threshold value may be 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, or 0.8 mm.

[0167] Continue to refer to Figures 1 to 5As shown, this embodiment further provides a method for preparing a battery cell structure, which can be performed partially or entirely by the device for preparing the battery cell structure provided in the above embodiment, and the method specifically includes:

[0168] S101: transporting the diaphragm 101;

[0169] S102: transporting the electrode piece 102 to the discharge area 20;

[0170] S104: Transfer the electrode piece 102 at the corresponding discharge area 20 to the preset position of the diaphragm 101, so that the first electrode piece 1021 and the second electrode piece 1022 are alternately distributed on both sides of the thickness direction of the diaphragm 101, and a folding position 103 is formed between adjacent first electrode pieces 1021 and second electrode pieces 1022, so that the diaphragm 101 compounded with the electrode piece 102 can be folded in a Z shape along the folding position 103 on the supporting member 4 at least under the action of gravity.

[0171] The device for preparing the cell structure in this embodiment has the same structure and implementation principle as the device for preparing the cell structure provided in the above embodiment, and can bring the same or similar technical effects, and reference can be made to the description of the above embodiment.

[0172] In some embodiments, reference Figure 5 As shown, before the step of transferring the electrode piece 102 at the corresponding discharge area 20 to the preset position of the diaphragm 101, the method further includes:

[0173] S103: cutting two connected first pole pieces 1021;

[0174] The two connected second pole pieces 1022 are cut.

[0175] Other technical features are the same as those in the above embodiment and can bring the same or similar technical effects, which will not be described here one by one. For details, please refer to the description of the above embodiment.

[0176] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0177] In this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0178] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preparing a battery core structure, characterized in that: It comprises a diaphragm transmission structure (1) for transmitting at least a diaphragm (101) in a battery cell structure (100) and a pole piece transmission structure (2) for transmitting a pole piece (102) in the battery cell structure (100); The electrode piece transmission structure (2) has two discharge areas (20) respectively corresponding to the first electrode piece (1021) and the second electrode piece (1022) in the electrode pieces (102), and the two discharge areas (20) are arranged on two opposite sides in the thickness direction of the diaphragm (101); A pole piece transfer mechanism (3) is provided between each of the discharge areas (20) and the diaphragm transmission structure (1), and the pole piece transfer mechanism (3) is used to transfer and press the corresponding pole piece (102) to a preset position of the diaphragm (101), so that the first pole piece (1021) and the second pole piece (1022) are alternately distributed on both sides of the diaphragm (101) in the thickness direction, and a folding position (103) is formed between adjacent first pole pieces (1021) and second pole pieces (1022); A supporting member (4) is provided below the discharge end of the diaphragm transmission structure (1), and the supporting member (4) is used to support at least a portion of the diaphragm (101) composited with the electrode sheet, so that the diaphragm (101) composited with the electrode sheet can at least be folded in a Z shape along the folding position (103) on the supporting member (4) under the action of gravity.

2. The device for preparing a battery core structure according to claim 1, characterized in that: The pole piece transfer mechanism (3) comprises a connected moving part (31) and a connection pressing structure (32); The connecting and pressing structure (32) can be pre-connected with at least the pole piece (102) at the discharge area (20); the moving part (31) is used to drive the connecting and pressing structure (32) to reciprocate between the corresponding discharge area (20) and the diaphragm (101), so as to transfer the pole piece (102) from the corresponding discharge area (20) and press it to the preset position through the connecting and pressing structure (32).

3. The device for preparing the battery core structure according to claim 2, characterized in that: The connection pressing structure (32) further comprises a telescopic member (321) and a connecting member (322) that can be pre-connected with the pole piece (102); The telescopic member (321) is connected between the moving member (31) and the connecting member (322) to at least drive the connecting member (322) to move in a direction close to the preset position to press the pole piece (102) onto the diaphragm (101), or to drive the connecting member (322) to move in a direction away from the preset position to separate the connecting member (322) from the diaphragm (101).

4. The device for preparing a battery core structure according to claim 3, characterized in that: The connecting member (322) includes a first adsorption member (3221); The first adsorption member (3221) is used for adsorption pre-connection with the electrode piece (102) at the corresponding discharge area (20).

5. The device for preparing a battery core structure according to claim 4, characterized in that: The first adsorbing member (3221) is provided with a first air hole connected to the outside; the connecting member (322) further comprises a first suction member connected to the first air hole, so that the first adsorbing member (3221) can adsorb the electrode (102) when the first suction member draws air; And / or, the size of the area in which the first adsorption member (3221) is disposed is not less than the outer contour size of the first pole piece (1021) and the second pole piece (1022); And / or, the connecting member (322) further includes a pressing member (3222) connected between the first adsorption member (3221) and the telescopic member (321); the projection of the first adsorption member (3221) on the pressing member (3222) is located within the area enclosed by the outer contour of the pressing member (3222).

6. The device for preparing a battery core structure according to claim 3, characterized in that: The connection and pressing structure (32) further includes a heating element (323); The adhesive portion on the diaphragm (101) can be softened under the heating action of the heating element (323) so as to adhere the pole piece (102) to the diaphragm (101).

7. The device for preparing a battery core structure according to claim 6, characterized in that: The connecting member (322) has a receiving cavity, and the heating member (323) is located in the receiving cavity and is thermally connected to the cavity wall of the receiving cavity; The outer contour of the heating element (323) is adapted to the size of the accommodating cavity; and / or the heating element (323) and the cavity wall of the accommodating cavity are detachably connected; and / or the connecting member (322) includes a first adsorption member (3221) and a pressing member (3222) that are thermally conductively connected; the pressing member (3222) is detachably connected between the first adsorption member (3221) and the telescopic member (321), and the pressing member (3222) has the accommodating cavity.

8. The device for preparing a battery core structure according to any one of claims 2 to 7, characterized in that: There are at least two connecting and pressing structures (32); At least two of the connecting and pressing structures (32) are arranged at intervals along the circumference of the moving part (31) and move synchronously with the moving part (31).

9. The device for preparing a battery core structure according to any one of claims 1 to 7, characterized in that: Each of the electrode piece transmission structures (2) comprises a conveying structure (21) located at a corresponding discharge area (20); A fixing component (22) is provided on the conveying structure (21), and the fixing component (22) is used to pre-connect the pole piece (102) to the conveying structure (21) before the pole piece transfer mechanism (3) transfers the pole piece (102).

10. The device for preparing a battery core structure according to claim 9, characterized in that: The fixing assembly (22) comprises a second adsorption member (222); the second adsorption member (222) is used to perform adsorption pre-connection on the pole piece (102) before the pole piece transfer mechanism (3) transfers the pole piece (102); The second adsorbing member (222) is provided with a second air hole connected to the outside, and the fixing component (22) further comprises a second suction member (221) connected to the second air hole, and the second adsorbing member (222) can adsorb the pole piece (102) when the second suction member (221) draws air; And / or, the conveying structure (21) comprises at least two transmission members (211) arranged at intervals along a preset direction and an annular conveying member (212) arranged around a portion of the outer circumference of each transmission member (211).

11. The device for preparing a battery core structure according to claim 9, characterized in that: There are at least two of each of the first pole piece (1021) and the second pole piece (1022), and each of the first pole pieces (1021) and each of the second pole pieces (1022) are connected in sequence; The device for preparing the battery core structure further comprises a first cutting piece (5) corresponding to the first pole piece (1021) and a second cutting piece (6) corresponding to the second pole piece (1022); the first cutting piece (5) is used for cutting two adjacent first pole pieces (1021), and the second cutting piece (6) is used for cutting two adjacent second pole pieces (1022); The first cutting member (5) is located in an area defined on both sides of the corresponding fixing assembly (22) in the length direction, and the first cutting member (5) is located on the upstream side of the pole piece transfer mechanism (3); The second cutting member (6) is located in an area defined on both sides of the corresponding fixing assembly (22) in the length direction, and the second cutting member (6) is located on the upstream side of the pole piece transfer mechanism (3).

12. The device for preparing a battery core structure according to any one of claims 1 to 7, characterized in that: The diaphragm transmission structure (1) comprises two pressing components (11); The pressing assembly (11) corresponds to the pole piece transfer mechanism (3) one by one and is located at the downstream side of the corresponding pole piece transfer mechanism (3); the pressing assembly (11) has a gap for allowing the diaphragm (101) combined with the pole piece to pass through, and is capable of pressing the pole piece (102) and the diaphragm (101) when the diaphragm (101) passes through; And / or, a first deviation-correcting structure (7) is further provided on the transmission path of the diaphragm transmission structure (1); the first deviation-correcting structure (7) is located on the upstream side of the corresponding pole piece transfer mechanism (3), and is used to detect the position of the diaphragm (101) relative to the diaphragm transmission structure (1), so as to adjust the position of the diaphragm (101) at least when the position of the diaphragm (101) is offset; And / or, a second correcting structure (8) is also provided on the transmission path of the pole piece transmission structure (2); the second correcting structure (8) is located on the upstream side of the corresponding pole piece transfer mechanism (3), and is used to detect the position of the pole piece (102) relative to the pole piece transmission structure (2), so as to adjust the position of the corresponding pole piece (102) at least when the position of the pole piece (102) is offset.

13. The device for preparing a battery core structure according to any one of claims 1 to 7, characterized in that: The supporting member (4) comprises a bottom wall (41) and a side blocking wall (42); The side blocking wall (42) is connected to the bottom wall (41) and extends upward in a direction away from the bottom wall (41); the bottom wall (41) is used to support at least a portion of the diaphragm (101) composite with the electrode piece; There are two side blocking walls (42), the two side blocking walls (42) are arranged opposite to each other, and the difference between the distance between the two side blocking walls (42) and the distance between two adjacent folding positions (103) is not greater than a preset threshold.

14. A method for preparing a battery cell structure using the battery cell structure preparation device according to any one of claims 1 to 13, characterized in that: The method comprises: transporting the diaphragm (101); transferring the pole piece (102) to the discharge area (20); The electrode piece (102) at the corresponding discharge area (20) is transferred to a preset position of the diaphragm (101), so that the first electrode piece (1021) and the second electrode piece (1022) are alternately distributed on both sides of the diaphragm (101) in the thickness direction, and a folding position (103) is formed between adjacent first electrode pieces (1021) and second electrode pieces (1022), so that the diaphragm (101) compounded with the electrode piece is folded in a Z shape along the folding position (103) on the supporting member (4) at least under the action of gravity.

15. The method according to claim 14, characterized in that Before the step of transferring the pole piece (102) at the corresponding discharge area (20) to the preset position of the diaphragm (101), the method further comprises: Cutting the two first connected pole pieces (1021); Cutting the two connected second pole pieces (1022).

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