Battery stacking method, apparatus, and system

Abstract

The present application discloses a battery stacking method, an apparatus, and a system. A stack stacking device comprises a bearing plate and a limiting assembly capable of moving on the beating plate, a plurality of cathode sheets are spaced on an anode material strip, the anode material strip is folded at folding positions corresponding to spacings between adjacent cathode sheets to obtain a plurality of electrode sheet units, and each electrode sheet unit is stacked on a bearing plate of a stacking mechanism. The method comprises: acquiring a target offset distance of a first electrode sheet unit of the anode material strip relative to a first reference position; obtaining a target stacking position of the first electrode sheet unit on the basis of the target offset distance and a second reference position, wherein the second reference position is a reference position set when the electrode sheet units of the anode material strip are stacked on the bearing plate; and if the first electrode sheet unit is the first stacked electrode sheet unit, when the first electrode sheet unit is stacked on the bearing plate, controlling the limiting assembly to push the first electrode sheet unit to move to the target stacking position.

Description

Battery stacking method, apparatus and system

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410666084.6, filed on May 27, 2024, entitled “Battery Stacking Method, Apparatus and System”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery stacking method, apparatus and system. Background Technology

[0004] In battery cell production, cathode sheets are spaced apart on the anode strip. The strip is folded and stacked with the interval between adjacent cathode sheets as the folding position. Since each electrode unit (each electrode unit includes one cathode sheet) is stacked freely, the stacking position of each electrode unit may be different during stacking. In particular, when the first electrode is stacked, there is a tailing phenomenon, meaning that the stacking position of the first electrode is highly random and the stacking position is not very accurate.

[0005] Summary of the Invention

[0006] This application provides a battery stacking method, apparatus, and system to solve the problem of poor accuracy in electrode stacking position.

[0007] In a first aspect, this application provides a battery stacking method applied to a battery stacking equipment. The battery stacking equipment includes a stacking mechanism for stacking anode strips. The stacking mechanism includes a support plate and a limiting component movable on the support plate. A plurality of cathode sheets are spaced apart on the anode strip. The anode strip is folded with the interval between adjacent cathode sheets as the folding position to obtain a plurality of electrode units. Each electrode unit includes one cathode sheet. Each electrode unit is stacked onto the support plate of the stacking mechanism. The method includes:

[0008] The target offset distance of the first electrode unit of the anode strip relative to the first reference position is obtained. The first reference position is the reference position set for the anode strip during the conveying stage.

[0009] Based on the target offset distance and the second reference position, the target stacking position of the first electrode unit is obtained. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the carrier plate.

[0010] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position.

[0011] In this embodiment of the application, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0012] In one embodiment of this application, after the control limiting component pushes the first electrode unit to the target stacking position, the method further includes:

[0013] When the second electrode unit of the anode strip is stacked on top of the first electrode unit, the control limiting component pushes the second electrode unit to align with the first electrode unit.

[0014] In this embodiment, after the second electrode unit is stacked on the first electrode unit, the control limiting component pushes the electrode unit to the target stacking position. During the pushing process, under the action of the limiting component, the second electrode unit can be aligned with the first electrode unit on the carrier plate, thereby achieving the purpose of electrode shaping.

[0015] In one embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by folding.

[0016] The target offset distance is the offset distance of the edge of the anode plate relative to the first reference position.

[0017] In this embodiment of the application, when determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode strip relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the accurate shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0018] In one embodiment of this application, the battery stacking device further includes a first detection unit and a second detection unit;

[0019] Obtaining the target offset distance of the first electrode unit of the anode strip relative to the first reference position includes:

[0020] The first offset distance detected by the first detection unit and the second offset distance detected by the second detection unit are obtained. The first offset distance is the distance between the edge of the anode plate and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position.

[0021] The sum of the first offset distance and the second offset distance is taken as the target offset distance.

[0022] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0023] In one embodiment of this application, the target stacking position of the first electrode unit is obtained based on the target offset distance and the second reference position, including:

[0024] The target offset distance is offset from the second reference position to obtain the target stacking position, which is a stacking area. The width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0025] In this embodiment, the target stacking position is obtained by offsetting the target offset distance based on the second reference position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists in the stacking of the first electrode unit.

[0026] In one embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along a first direction;

[0027] The control and limiting components push the first electrode unit to the target stacking position, including:

[0028] The first and second limiting members are controlled to push the first electrode unit to the target stacking position;

[0029] After the control limiting component pushes the first electrode unit to the target stacking position, the method further includes:

[0030] The first and second limiting members are controlled to retract to the first position, wherein the distance between the first and second limiting members retracted to the first position is greater than or equal to the width of the diaphragm.

[0031] In this embodiment, after the first electrode unit moves to the target stacking position, the first limiting member and the second limiting member retract to the first position. The distance between the first limiting member and the second limiting member retracting to the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member and the second limiting member jamming the diaphragm and causing the diaphragm to not be laid flat.

[0032] In one embodiment of this application, an air suction hole is provided on the support plate;

[0033] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position, including:

[0034] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit falls, the support plate is controlled to extend from the initial position to the receiving position, so that the first electrode unit is stacked on the support plate;

[0035] The control and limiting components push the first electrode unit to the target stacking position;

[0036] Control the intake port to draw in air so as to adsorb the first electrode unit covering the intake port.

[0037] In this embodiment, the first electrode unit is the first electrode unit to be stacked. When the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the suction hole on the support member is controlled to suck air to adsorb the first electrode unit. In this way, when the limiting component pushes the first electrode unit and the second electrode unit to move after the second electrode unit falls on the first electrode unit, the first electrode unit will not move due to the adsorption of the suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the suction hole. This makes the second electrode unit aligned with the first electrode unit, achieving the purpose of electrode shaping.

[0038] In one embodiment of this application, the method further includes:

[0039] When the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off. The third electrode unit is the last electrode unit stacked on the carrier plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the carrier plate.

[0040] The air intake is controlled to stop intake, and the support plate is controlled to retract to the initial position, so that the electrode units stacked on the support plate fall into the stack below the support plate.

[0041] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0042] Secondly, embodiments of this application provide a battery stacking apparatus, applied to a battery stacking equipment. The battery stacking equipment includes a stacking mechanism for stacking anode strips. The stacking mechanism includes a support plate and a limiting component movable on the support plate. Multiple cathode sheets are spaced apart on the anode strip. The anode strip is folded with the interval between adjacent cathode sheets as the folding position to obtain multiple electrode units. Each electrode unit includes one cathode sheet. Each electrode unit is stacked onto the support plate of the stacking mechanism. The battery stacking apparatus includes:

[0043] The first acquisition module is used to acquire the target offset distance of the first electrode unit of the anode strip relative to the first reference position, where the first reference position is a reference position set for the anode strip during the conveying stage.

[0044] The second acquisition module is used to obtain the target stacking position of the first electrode unit based on the target offset distance and the second reference position. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the carrier plate.

[0045] The first control module is used to control the limiting component to move the first electrode unit to the target stacking position when the first electrode unit is stacked on the support plate, if the first electrode unit is the first electrode unit to be stacked.

[0046] In this embodiment of the application, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0047] In one embodiment of this application, the battery stacking device further includes:

[0048] The second control module is used to control the limiting component to push the second electrode unit to align with the first electrode unit when the second electrode unit of the anode strip is stacked on top of the first electrode unit.

[0049] In this embodiment, after the second electrode unit is stacked on the first electrode unit, the control limiting component pushes the electrode unit to the target stacking position. During the pushing process, under the action of the limiting component, the second electrode unit can be aligned with the first electrode unit on the carrier plate, thereby achieving the purpose of electrode shaping.

[0050] In one embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by folding.

[0051] The target offset distance is the offset distance of the edge of the anode plate relative to the first reference position.

[0052] In this embodiment of the application, when determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode strip relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the accurate shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0053] In one embodiment of this application, the battery stacking device further includes a first detection unit and a second detection unit;

[0054] The first acquisition module includes:

[0055] The acquisition submodule is used to acquire the first offset distance detected by the first detection unit and the second offset distance detected by the second detection unit. The first offset distance is the distance between the edge of the anode plate and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position.

[0056] The determination submodule is used to take the sum of the first offset distance and the second offset distance as the target offset distance.

[0057] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0058] In one embodiment of this application, the second acquisition module is specifically used to offset the target offset distance based on the second reference position to obtain the target stacking position. The target stacking position is a stacking area, and the width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0059] In this embodiment, the target stacking position is obtained by offsetting the target offset distance based on the second reference position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists in the stacking of the first electrode unit.

[0060] In one embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along a first direction;

[0061] The first control module is specifically used to control the first limiting member and the second limiting member to push the first electrode unit to the target stacking position;

[0062] The battery stacking device also includes:

[0063] The third control module is used to control the first limiting member and the second limiting member to retract to the first position respectively, wherein the distance between the first limiting member and the second limiting member retracting to the first position is greater than or equal to the width of the diaphragm.

[0064] In this embodiment, after the first electrode unit moves to the target stacking position, the first limiting member and the second limiting member retract to the first position. The distance between the first limiting member and the second limiting member retracting to the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member and the second limiting member jamming the diaphragm and causing the diaphragm to not be laid flat.

[0065] In one embodiment of this application, an air suction hole is provided on the support plate;

[0066] The first control module includes:

[0067] The first control submodule is used to control the support plate to extend from the initial position to the receiving position when the first electrode unit falls, if the first electrode unit is the first electrode unit to be stacked, so that the first electrode unit is stacked on the support plate.

[0068] The second control submodule is used to control the limiting component to push the first electrode unit to the target stacking position;

[0069] The third control submodule is used to control the intake port to draw in air so as to adsorb the first electrode unit covering the intake port.

[0070] In this embodiment, the first electrode unit is the first electrode unit to be stacked. When the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the suction hole on the support member is controlled to suck in air to adsorb the first electrode unit. In this way, when the second electrode unit falls on the first electrode unit and the limiting component pushes the first electrode unit and the second electrode unit to move, the first electrode unit will not move due to the adsorption of the suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the suction hole. This makes the second electrode unit aligned with the first electrode unit, achieving the purpose of electrode shaping.

[0071] In one embodiment of this application, the battery stacking device further includes:

[0072] The fourth control module is used to cut off the connection between the third electrode unit and other electrode units when the number of electrode units stacked on the carrier plate is a preset threshold. The third electrode unit is the last electrode unit stacked on the carrier plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the carrier plate.

[0073] The fifth control module is used to control the air intake to stop intake and control the support plate to retract to the initial position, so that the electrode units stacked on the support plate fall into the stack below the support plate.

[0074] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0075] Thirdly, embodiments of this application provide a battery stacking system. The battery stacking system includes a battery stacking device and a controller. The battery stacking device includes a stacking mechanism for stacking anode strips. The stacking mechanism includes a support plate and a limiting component movable on the support plate. Multiple cathode sheets are spaced apart on the anode strip. The anode strip is folded with the interval between adjacent cathode sheets as the folding position to obtain multiple electrode units. Each electrode unit includes one cathode sheet. Each electrode unit is stacked onto the support plate of the stacking mechanism. The controller is used for:

[0076] The target offset distance of the first electrode unit of the anode strip relative to the first reference position is obtained. The first reference position is the reference position set for the anode strip during the conveying stage.

[0077] Based on the target offset distance and the second reference position, the target stacking position of the first electrode unit is obtained. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the carrier plate.

[0078] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position.

[0079] In this embodiment of the application, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0080] In one embodiment of this application, the controller is further configured to control the limiting component to push the second electrode unit to align with the first electrode unit when the second electrode unit of the anode strip is stacked on top of the first electrode unit.

[0081] In this embodiment, after the second electrode unit is stacked on the first electrode unit, the control limiting component pushes the electrode unit to the target stacking position. During the pushing process, under the action of the limiting component, the second electrode unit can be aligned with the first electrode unit on the carrier plate, thereby achieving the purpose of electrode shaping.

[0082] In one embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by folding.

[0083] The target offset distance is the offset distance of the edge of the anode plate relative to the first reference position.

[0084] In this embodiment of the application, when determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode strip relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the accurate shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0085] In one embodiment of this application, the battery stacking device further includes a first detection unit and a second detection unit;

[0086] The controller is also configured to: acquire a first offset distance detected by the first detection unit and a second offset distance detected by the second detection unit, wherein the first offset distance is the distance between the edge of the anode plate and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position;

[0087] The sum of the first offset distance and the second offset distance is taken as the target offset distance.

[0088] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0089] In one embodiment of this application, the controller is further configured to: offset the target offset distance based on the second reference position to obtain a target stacking position, wherein the target stacking position is a stacking area, and the width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0090] In this embodiment, the target stacking position is obtained by offsetting the target offset distance based on the second reference position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists in the stacking of the first electrode unit.

[0091] In one embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along a first direction;

[0092] The controller is also used to: control the first and second limiting members to push the first electrode unit to the target stacking position;

[0093] The first and second limiting members are controlled to retract to the first position, wherein the distance between the first and second limiting members retracted to the first position is greater than or equal to the width of the diaphragm.

[0094] In this embodiment, after the first electrode unit moves to the target stacking position, the first limiting member and the second limiting member retract to the first position. The distance between the first limiting member and the second limiting member retracting to the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member and the second limiting member jamming the diaphragm and causing the diaphragm to not be laid flat.

[0095] In one embodiment of this application, an air suction hole is provided on the support plate;

[0096] The controller is also used to: if the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit falls, control the support plate to extend from the initial position to the receiving position, so that the first electrode unit is stacked on the support plate;

[0097] The control and limiting components push the first electrode unit to the target stacking position;

[0098] Control the intake port to draw in air so as to adsorb the first electrode unit covering the intake port.

[0099] In this embodiment, the first electrode unit is the first electrode unit to be stacked. When the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the suction hole on the support member is controlled to suck in air to adsorb the first electrode unit. In this way, when the second electrode unit falls on the first electrode unit and the limiting component pushes the first electrode unit and the second electrode unit to move, the first electrode unit will not move due to the adsorption of the suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the suction hole. This makes the second electrode unit aligned with the first electrode unit, achieving the purpose of electrode shaping.

[0100] In one embodiment of this application, the controller is further configured to: disconnect the connection between the third electrode unit and other electrode units when the number of electrode units stacked on the carrier plate is a preset threshold. The third electrode unit is the last electrode unit stacked on the carrier plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the carrier plate.

[0101] The air intake is controlled to stop intake, and the support plate is controlled to retract to the initial position, so that the electrode units stacked on the support plate fall into the stack below the support plate.

[0102] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0103] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0104] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0105] Figure 1 is a schematic flowchart of the battery stacking method provided in an embodiment of this application;

[0106] Figure 2 is a partial structural schematic diagram of the battery stacking equipment provided in an embodiment of this application;

[0107] Figure 3 is a partial structural schematic diagram of the battery stacking equipment provided in an embodiment of this application;

[0108] Figure 4 is a structural schematic diagram of the first limiting member provided in an embodiment of this application;

[0109] Figure 5 is a structural schematic diagram of the second limiting member provided in an embodiment of this application;

[0110] Figure 6 is a schematic diagram of the structure of the support plate provided in an embodiment of this application;

[0111] Figure 7 is a schematic diagram of the battery stacking device provided in an embodiment of this application;

[0112] Figure 8 is a schematic diagram of the battery stacking system provided in an embodiment of this application.

[0113] Detailed explanation of reference numerals in the attached drawings: 1. Anode strip; 2. Support plate; 3. Cathode sheet; 4. Electrode unit; 5. First detection unit; 6. Second detection unit; 7. Limiting plate; 8. First limiting member; 9. Second limiting member; 10. First protrusion; 11. Second protrusion; 12. Support member; 13. First edge; 14. Second edge; X, First direction; Y, Second direction; F, Belt travel direction. Detailed Implementation

[0114] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0115] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0116] In battery cell production, cathode sheets are spaced apart on the anode strip, and folding is performed using the intervals between adjacent cathode sheets as the folding position. Since each electrode unit (each electrode unit includes one cathode sheet) is freely stacked, the stacking position of each electrode unit may differ during stacking, especially when the first electrode is stacked, where a "tailing" phenomenon occurs, meaning the stacking position of the first electrode is highly random and lacks precision. Furthermore, the highly random stacking position of some electrode units initially stacked can also lead to misalignment of the electrode units.

[0117] Based on the above problems, this application provides a battery stacking method, apparatus and system. When the first electrode unit is stacked on the support plate, the first electrode unit is moved to the target stacking position, which can make the stacking position of the first electrode unit more accurate and effectively solve the tailing phenomenon of the first electrode. Furthermore, after each electrode unit is stacked, the stacked electrode units are uniformly adjusted to move several electrode units to the target stacking position, which can make multiple electrode units aligned.

[0118] The following describes the battery stacking method, apparatus, and system provided in the embodiments of this application. Figure 1 is a schematic flowchart of a battery stacking method provided in an embodiment of this application, and Figure 2 shows a battery stacking device provided in an embodiment of this application. The battery stacking device is used to stack anode strips 1. The battery stacking device includes a stacking mechanism, which includes a support plate 2 and a limiting component that can move on the support plate 2 (as shown in Figures 4 and 5). A plurality of cathode sheets 3 are spaced apart on the anode strip 1. The anode strip 1 is folded with the interval between adjacent cathode sheets 3 as the folding position to obtain a plurality of electrode units 4. Each electrode unit 4 includes a cathode sheet 3. Each electrode unit 4 is stacked on the support plate 2 of the stacking mechanism.

[0119] The battery stacking method provided in this application is applied to a battery stacking equipment. As shown in Figure 1, the battery stacking method provided in this application includes the following steps 101-103:

[0120] Step 101: Obtain the target offset distance of the first electrode unit of the anode strip relative to the first reference position, where the first reference position is a reference position set for the anode strip during the conveying stage.

[0121] Referring to Figure 2, a plurality of cathode plates 3 are spaced apart on the anode strip 1. The area between every two adjacent intervals of the anode strip 1 (this area includes one cathode plate) is considered as an electrode unit 4. For ease of description, the first electrode unit is used as an example in this embodiment. The anode strip 1 includes an anode plate and diaphragms disposed on both sides of the anode plate. It should be noted that the edges of the two diaphragms can be aligned.

[0122] During the conveying stage of the anode strip 1, a first reference position is pre-marked. Subsequently, when determining the position of the first electrode unit, the first reference position is used as a reference to obtain the target offset distance of the first electrode unit relative to the first reference position. For example, the target offset distance is the offset distance of the edge of the anode plate of the first electrode unit relative to the first reference position.

[0123] Step 102: Based on the target offset distance and the second reference position, the target stacking position of the first electrode unit is obtained. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the carrier plate.

[0124] The second reference position is pre-marked. For example, the electrode units in the anode strip are stacked continuously. The first electrode on the support plate will have a tailing phenomenon. The stacking position of the first electrode on the support plate is relatively random. As more and more electrode units are stacked, the position of the new electrode unit on the support plate (indirectly on the support plate, that is, actually on other electrode units already stacked on the support plate) changes less and is relatively fixed. In this case, the electrode units stacked later will be aligned with the electrode units stacked earlier.

[0125] When calibrating the second reference position, the reference position of the anode strip involved in the calibration during the conveyor belt stage is adjusted to the first reference position. For example, the position of the edge of the anode sheet in the anode strip involved in the calibration is used as the first reference position. Multiple electrode units are stacked continuously. After the stacking position of the electrode units (it should be noted that during the continuous stacking of multiple electrode units, the later electrode unit is stacked on the previous electrode unit, and the actual stacking position of each electrode unit is different. For ease of description, in the embodiments of this application, the stacking position of the electrode unit can be understood as the vertical projection of the actual stacking position of the electrode unit on the carrier plate) changes little and tends to stabilize, the stacking position with little change is used as the second reference position.

[0126] The target stacking position can be obtained by offsetting the second reference position by a target offset distance. For example, the second reference position can be the location of a region. The center point of the region is offset by the target offset distance to obtain the center point of the target stacking position, and the target stacking position is determined based on this new center point. Alternatively, the second reference position can be the location of the central axis of the stacking region. The central axis is offset by the target offset distance to obtain the central axis of the target stacking position, and the target stacking position is determined based on this new central axis.

[0127] Step 103: If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, the limiting component is controlled to push the first electrode unit to the target stacking position.

[0128] As shown in Figure 3, X is the first direction and Y is the second direction. Two limiting plates 7 are arranged opposite each other in the second direction. The distance between the two limiting plates 7 is equal to or slightly greater than the length of the electrode unit in the Y direction. When the first electrode unit falls on the support plate 2, the first electrode unit will hardly shift in position in the Y direction due to the restriction of the two limiting plates 7. However, since there are no limiting plates 7 in the X direction, there may be a shift in the X direction. In this embodiment, a limiting component can be set in the X direction to push the first electrode unit to the target stacking position.

[0129] In this embodiment, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0130] In one embodiment of this application, after controlling the limiting component to push the first electrode unit to the target stacking position, the method further includes:

[0131] When the second electrode unit of the anode strip is stacked on top of the first electrode unit, the limiting component is controlled to push the second electrode unit to align with the first electrode unit.

[0132] In this embodiment, the second electrode unit can be adjacent to the first electrode unit. In this case, when the second electrode unit is stacked on the first electrode unit, it is in direct contact with the first electrode unit. Alternatively, the second electrode unit and the first electrode unit are not adjacent. In this case, when the second electrode unit is stacked on the first electrode unit, one or more electrode units are spaced between the first electrode unit and the second electrode unit, and the second electrode unit is in indirect contact with the first electrode unit.

[0133] As shown in Figure 3, when each electrode unit 4 falls onto the support plate 2, due to the restriction of the two limiting plates 7, the positional offset of the electrode unit 4 in the Y direction is very small. That is to say, the alignment of each electrode unit 4 in the Y direction meets the requirements. However, since there are no limiting plates 7 in the X direction, each electrode unit 4 may be offset in the X direction when stacked, resulting in the electrode units 4 not being aligned. In this embodiment, limiting components can be set in the X direction to push the electrode units 4 to align. For example, two first limiting members 8 (as shown in Figure 4) and second limiting members 9 (as shown in Figure 5) that can move along the X direction are set in the X direction. The first limiting members 8 and the second limiting members 9 are arranged opposite to each other, and the stacked electrode units 4 are located between the first limiting members 8 and the second limiting members 9. After the second electrode unit is stacked on the first electrode unit, the first limiting member 8 and the second limiting member 9 are controlled to move toward the electrode unit, pushing the two electrode units 4 to the target stacking position. During the pushing process, under the action of the first limiting member 8 and the second limiting member 9, the second electrode unit can be pushed to align with the existing first electrode unit on the carrier plate 2, so as to achieve the purpose of electrode shaping.

[0134] In another embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by the folding. The target offset distance is the offset distance of the edge of the anode sheet relative to the first reference position.

[0135] The first reference position is determined through pre-calibration. When determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode sheet relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the precise shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0136] One embodiment of this application provides a method for determining a target offset distance, wherein the battery stacking device further includes a first detection unit and a second detection unit;

[0137] Obtaining the target offset distance of the first electrode unit of the anode strip relative to the first reference position includes:

[0138] The first offset distance detected by the first detection unit and the second offset distance detected by the second detection unit are obtained. The first offset distance is the distance between the edge of the anode sheet and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position.

[0139] The sum of the first offset distance and the second offset distance is taken as the target offset distance.

[0140] As shown in Figure 2 above, the first detection unit 5 can be a camera. The camera takes a picture of the anode strip to obtain the distance between the edge of the anode strip 1 in the first electrode unit and the edge of the diaphragm. It should be noted that the width of the diaphragm in the first direction is greater than the width of the anode strip in the first direction. The anode sheet in the first direction can be regarded as being centrally located in the diaphragm. That is to say, the edges of the anode sheet on both sides in the first direction (as shown in Figure 3, including the first edge 13 and the second edge 14) are equidistant from the corresponding edges of the diaphragm. In this embodiment, the first offset distance can be the distance between the edge of the anode sheet on any side and the edge of the diaphragm in the first direction.

[0141] If the first reference position is used to calibrate the first side edge of the diaphragm in the first direction as the reference position, then when determining the second offset distance, the distance between the first side edge of the diaphragm in the first electrode unit and the first reference position is detected in the first direction to obtain the second offset distance.

[0142] As shown in Figure 2, the second detection unit 6 can be a material injection strip detection component. This component cannot penetrate the anode material strip, but can only penetrate the diaphragm. Based on this, in this embodiment, by detecting the offset distance (i.e., the second offset distance) of the diaphragm edge in the first electrode unit relative to the first reference position, and detecting the offset distance (i.e., the first offset distance) between the diaphragm edge and the anode edge in the first electrode unit, and calculating the sum of the first offset distance and the second offset distance, the distance of the anode sheet offset from the first reference position, i.e., the target offset distance, can be indirectly calculated. This method of calculating the target offset distance is relatively simple and can reduce the computational complexity.

[0143] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0144] In one embodiment of this application, the target stacking position of the first electrode unit is obtained based on the target offset distance and the second reference position, including:

[0145] The target stacking position is obtained by offsetting the target offset distance based on the second reference position. The target stacking position is a stacking area, and the width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0146] For example, if the second reference position is the location of a region, then the center point of that region is offset by the target offset distance in the first direction to obtain the target stacking position. It should be noted that the target offset distance can be a positive or negative value, which can be achieved by defining a positive direction in the first direction, which will not be elaborated here.

[0147] For example, the width of the stacking area in the first direction may be equal to or slightly larger than the width of the anode sheet in the first direction.

[0148] In this embodiment, the target offset distance is offset from the second reference position to obtain the target stacking position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists when the first electrode unit is stacked.

[0149] As more and more electrode units are stacked, the position of the newly arrived electrode unit on the support plate (indirectly on the support plate, that is, actually on other electrode units already stacked on the support plate) changes little and is relatively fixed. In this case, the electrode units stacked later will be aligned with the electrode units stacked earlier.

[0150] In another embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along the first direction;

[0151] Controlling the limiting component to push the first electrode unit to the target stacking position includes:

[0152] Control the first limiting member and the second limiting member to push the first electrode unit to the target stacking position;

[0153] After controlling the limiting component to push the first electrode unit to the target stacking position, the method further includes:

[0154] The first limiting member and the second limiting member are controlled to retract to a first position, wherein the distance between the first limiting member and the second limiting member when they retract to the first position is greater than or equal to the width of the diaphragm in a first direction.

[0155] Specifically, the first limiting member and the second limiting member are arranged opposite to each other, and both the first limiting member and the second limiting member can move along the first direction on the support plate, and the first electrode unit is located between the first limiting member and the second limiting member.

[0156] The battery stacking equipment also includes a first drive motor and a second drive motor, as shown in Figures 4 and 5. The first limiting member 8 is provided with a first protrusion 10, and the second limiting member 9 is provided with a second protrusion 11. The first drive motor (not shown in the figure) is connected to the first protrusion 10 and drives the first protrusion 10 to move, thereby driving the first limiting member 8 to move. The second drive motor (not shown in the figure) is connected to the second protrusion 11 and drives the second protrusion 11 to move, thereby driving the second limiting member 9 to move.

[0157] When the first limiting member 8 and the second limiting member 9 move, they can push the first electrode unit to move. For example, the first limiting member 8 and the second limiting member 9 clamp the first electrode unit and move it to the target stacking position. After the first electrode unit moves to the target stacking position, the first limiting member 8 and the second limiting member 9 retract to the first position. The distance between the first limiting member 8 and the second limiting member 9 when they retract to the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member 8 and the second limiting member 9 jamming the diaphragm and causing the diaphragm to not lay flat.

[0158] In another embodiment of this application, the support plate is provided with air suction holes;

[0159] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, controlling the limiting component to push the first electrode unit to the target stacking position includes:

[0160] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit falls, the support plate is controlled to extend from the initial position to the receiving position, so that the first electrode unit is stacked on the support plate;

[0161] The limiting component is controlled to push the first electrode unit to the target stacking position;

[0162] The air intake is controlled to draw in air so as to adsorb the first electrode unit covering the air intake.

[0163] Specifically, Figure 6 is a schematic diagram of the bearing plate structure provided in the embodiment of this application. As shown in Figure 6, the bearing plate 2 includes a plurality of support members 12 disposed on a side limiting plate 7. Three support members 12 are shown in Figure 6. These three support members 12 are arranged in parallel. The support members 12 are provided with air suction holes. When not in use, the bearing plate 2 is shrunk to the initial position. When in use, the bearing plate 2 extends to the receiving position. For example, the receiving position is located on the other side limiting plate 7. Specifically, the other side limiting plate 7 is provided with a groove on the side opposite to the other side limiting plate 7, and the support member extends into the groove.

[0164] When the first electrode unit is the first electrode unit to be stacked, and the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the air suction hole on the support member is controlled to suck in air to adsorb the first electrode unit. In this way, when the second electrode unit falls on the first electrode unit, and the limiting component pushes the first electrode unit and the second electrode unit to move, the first electrode unit will not move due to the adsorption of the air suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the air suction hole. This makes the second electrode unit aligned with the first electrode unit, thus achieving the purpose of electrode shaping.

[0165] It should be noted that as more and more electrode units fall onto the support plate, the stacking position of the electrode units tends to stabilize. Thus, the electrode units falling later will align with those falling earlier. In this case, the limiting component is no longer needed to push the electrode units on the support plate. For example, when the number of electrode units on the support plate is 10 or 15, the use of the limiting component to push the electrode units on the support plate can be stopped, which can save the power consumption of driving the limiting component and reduce the loss from the movement of the limiting component.

[0166] In yet another embodiment of this application, the method further includes:

[0167] When the number of electrode units stacked on the support plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off. The third electrode unit is the last electrode unit stacked on the support plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the support plate.

[0168] The air intake hole is controlled to stop intake, and the support plate is controlled to retract to the initial position, so that the electrode units stacked on the support plate fall into the stacking platform below the support plate.

[0169] The preset threshold can be set according to the actual situation, such as 40, and is not limited here. When there are 40 electrode units stacked on the carrier plate, the connection between the third electrode unit and other electrode units is cut off, and the air intake is controlled to stop air intake. The carrier plate is retracted to the initial position, so that the 40 electrode units fall into the stack below the carrier plate to obtain a set of electrode units for use in the subsequent cell manufacturing process.

[0170] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake hole is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0171] Please refer to Figure 7, which is a structural schematic diagram of the battery stacking device provided in this application embodiment. As shown in Figure 7, the battery stacking device 700 is applied to a battery stacking equipment. The battery stacking equipment includes a stacking mechanism for stacking anode strips. The stacking mechanism includes a support plate and a limiting component that can move on the support plate. A plurality of cathode sheets are spaced apart on the anode strip. The anode strip is folded with the interval between adjacent cathode sheets as the folding position to obtain a plurality of electrode units. Each electrode unit includes a cathode sheet. Each electrode unit is stacked on the support plate of the stacking mechanism. The battery stacking device 700 includes:

[0172] The first acquisition module 701 is used to acquire the target offset distance of the first electrode unit of the anode strip relative to the first reference position, wherein the first reference position is a reference position set for the anode strip during the conveying stage.

[0173] The second acquisition module 702 is used to obtain the target stacking position of the first electrode unit based on the target offset distance and the second reference position. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the carrier plate.

[0174] The first control module 703 is used to control the limiting component to push the first electrode unit to the target stacking position when the first electrode unit is stacked on the support plate, if the first electrode unit is the first electrode unit to be stacked.

[0175] In this embodiment of the application, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0176] In one embodiment of this application, the battery stacking device 700 further includes:

[0177] The second control module is used to control the limiting component to push the second electrode unit to align with the first electrode unit when the second electrode unit of the anode strip is stacked on top of the first electrode unit.

[0178] In this embodiment, after the second electrode unit is stacked on the first electrode unit, the control limiting component pushes the electrode unit to the target stacking position. During the pushing process, under the action of the limiting component, the second electrode unit can be aligned with the first electrode unit on the carrier plate, thereby achieving the purpose of electrode shaping.

[0179] In one embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by the folding.

[0180] The target offset distance is the offset distance of the edge of the anode plate relative to the first reference position.

[0181] In this embodiment, when determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode sheet relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the accurate shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0182] In one embodiment of this application, the battery stacking device further includes a first detection unit and a second detection unit;

[0183] The first acquisition module 701 includes:

[0184] The acquisition submodule is used to acquire the first offset distance detected by the first detection unit and the second offset distance detected by the second detection unit. The first offset distance is the distance between the edge of the anode plate and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position.

[0185] A determination submodule is used to take the sum of the first offset distance and the second offset distance as the target offset distance.

[0186] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0187] In one embodiment of this application, the second acquisition module 702 is specifically used to offset the target offset distance based on the second reference position to obtain the target stacking position. The target stacking position is a stacking area, and the width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0188] In this embodiment, the target stacking position is obtained by offsetting the target offset distance based on the second reference position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists in the stacking of the first electrode unit.

[0189] In one embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along the first direction;

[0190] The first control module 703 is specifically used to control the first limiting member and the second limiting member to push the first electrode unit to the target stacking position;

[0191] The battery stacking device 700 further includes:

[0192] The third control module is used to control the first limiting member and the second limiting member to retract to the first position respectively, wherein the distance between the first limiting member and the second limiting member when retracted to the first position is greater than or equal to the width of the diaphragm.

[0193] In this embodiment, after the first electrode unit moves to the target stacking position, the first limiting member and the second limiting member retract to the first position. The distance between the first limiting member and the second limiting member at the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member and the second limiting member jamming the diaphragm and causing the diaphragm to not lay flat.

[0194] In one embodiment of this application, the support plate is provided with air suction holes;

[0195] The first control module 703 includes:

[0196] The first control submodule is used to control the support plate to extend from the initial position to the receiving position when the first electrode unit falls, if the first electrode unit is the first stacked electrode unit, so that the first electrode unit is stacked on the support plate.

[0197] The second control submodule is used to control the limiting component to push the first electrode unit to the target stacking position;

[0198] The third control submodule is used to control the air intake hole to draw in air so as to adsorb the first electrode unit covering the air intake hole.

[0199] In this embodiment, the first electrode unit is the first electrode unit to be stacked. When the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the suction hole on the support member is controlled to suck in air to adsorb the first electrode unit. In this way, when the second electrode unit falls on the first electrode unit and the limiting component pushes the first electrode unit and the second electrode unit to move, the first electrode unit will not move due to the adsorption of the suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the suction hole. This makes the second electrode unit aligned with the first electrode unit, achieving the purpose of electrode shaping.

[0200] In one embodiment of this application, the battery stacking device 700 further includes:

[0201] The fourth control module is used to disconnect the connection between the third electrode unit and other electrode units when the number of electrode units stacked on the carrier plate is a preset threshold. The third electrode unit is the last electrode unit stacked on the carrier plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the carrier plate.

[0202] The fifth control module is used to control the air intake hole to stop intake and control the support plate to retract to the initial position, so that the electrode units stacked on the support plate fall into the stacking platform below the support plate.

[0203] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake hole is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0204] Figure 8 shows a battery stacking system provided in an embodiment of this application. As shown in Figure 8, the battery stacking system 800 includes a battery stacking device 801 and a controller 802. The battery stacking device 801 includes a stacking mechanism for stacking anode strips. The stacking mechanism includes a support plate and a limiting component that can move on the support plate. Multiple cathode sheets are spaced apart on the anode strip. The anode strip is folded with the interval between adjacent cathode sheets as the folding position to obtain multiple electrode units. Each electrode unit includes one cathode sheet. Each electrode unit is stacked on the support plate of the stacking mechanism. The controller 802 is used for:

[0205] The target offset distance of the first electrode unit of the anode strip relative to the first reference position is obtained, where the first reference position is a reference position set for the anode strip during the conveying stage.

[0206] The target stacking position of the first electrode unit is obtained based on the target offset distance and the second reference position. The second reference position is the reference position set when the electrode units of the anode strip are stacked on the support plate.

[0207] If the first electrode unit is the first electrode unit to be stacked, then when the first electrode unit is stacked on the support plate, the limiting component is controlled to push the first electrode unit to the target stacking position.

[0208] In this embodiment of the application, when the first electrode unit is stacked on the support plate, the control limiting component pushes the first electrode unit to the target stacking position to adjust the position of the first electrode unit stacked on the support plate, so that the stacking position of the first electrode unit is more accurate. Furthermore, since the stacking position of the first electrode unit is no longer a random position after falling, the tailing phenomenon of the first electrode stacking can be effectively solved.

[0209] In one embodiment of this application, the controller 802 is further configured to control the limiting component to push the second electrode unit to align with the first electrode unit when the second electrode unit of the anode strip is stacked on top of the first electrode unit.

[0210] In this embodiment, after the second electrode unit is stacked on the first electrode unit, the control limiting component pushes the electrode unit to the target stacking position. During the pushing process, under the action of the limiting component, the second electrode unit can be aligned with the first electrode unit on the carrier plate, thereby achieving the purpose of electrode shaping.

[0211] In one embodiment of this application, the anode strip includes an anode sheet and a diaphragm disposed on both sides of the anode sheet. The width of the diaphragm in a first direction is greater than the width of the anode sheet in the first direction, and the first direction is parallel to the crease formed by the folding.

[0212] The target offset distance is the offset distance of the edge of the anode plate relative to the first reference position.

[0213] In this embodiment of the application, when determining the target offset distance, the first reference position is used as a reference to determine the offset distance of the edge of the anode sheet relative to the first reference position. In this way, the target offset distance can be used as the offset distance of the stacking position of the first electrode unit relative to the second reference position when the first electrode unit is stacked on the carrier plate, so as to accurately calculate the stacking position of the first electrode unit, realize the accurate shaping of the first electrode, and effectively solve the tailing phenomenon of the first electrode.

[0214] In one embodiment of this application, the battery stacking device 801 further includes a first detection unit and a second detection unit;

[0215] The controller 802 is further configured to: acquire a first offset distance detected by the first detection unit and a second offset distance detected by the second detection unit, wherein the first offset distance is the distance between the edge of the anode plate and the edge of the diaphragm in the first electrode unit, and the second offset distance is the second offset distance of the edge of the diaphragm in the first electrode unit relative to the first reference position;

[0216] The sum of the first offset distance and the second offset distance is taken as the target offset distance.

[0217] In this embodiment, the first offset distance and the second offset distance are obtained by two detection units, thereby obtaining the target offset distance of the edge of the anode sheet in the first electrode unit relative to the first reference position, so as to facilitate the subsequent calculation of the target stacking position based on the target offset distance, thereby improving the accuracy of the stacking position of the first electrode sheet.

[0218] In one embodiment of this application, the controller 802 is further configured to: offset the target offset distance based on the second reference position to obtain the target stacking position, wherein the target stacking position is a stacking area, and the width of the stacking area in the first direction is determined according to the width of the anode sheet in the first direction.

[0219] In this embodiment, the target stacking position is obtained by offsetting the target offset distance based on the second reference position. This facilitates the subsequent adjustment of the position of the first electrode unit stacked on the support plate when the first electrode unit is stacked on the support plate. This makes the stacking position of the first electrode unit more accurate and can effectively solve the tailing phenomenon that exists in the stacking of the first electrode unit.

[0220] In one embodiment of this application, the limiting component includes a first limiting member and a second limiting member disposed opposite to each other along the first direction;

[0221] The controller 802 is further configured to: control the first limiting member and the second limiting member to push the first electrode unit to the target stacking position;

[0222] The first limiting member and the second limiting member are controlled to retract to a first position, wherein the distance between the first limiting member and the second limiting member when they retract to the first position is greater than or equal to the width of the diaphragm.

[0223] In this embodiment, after the first electrode unit moves to the target stacking position, the first limiting member and the second limiting member retract to the first position. The distance between the first limiting member and the second limiting member at the first position is equal to or slightly greater than the width of the diaphragm in the first direction, so as to avoid the first limiting member and the second limiting member jamming the diaphragm and causing the diaphragm to not lay flat.

[0224] In one embodiment of this application, the support plate is provided with air suction holes;

[0225] The controller 802 is further configured to: if the first electrode unit is the first stacked electrode unit, then when the first electrode unit falls, control the support plate to extend from the initial position to the receiving position, so that the first electrode unit is stacked on the support plate;

[0226] The limiting component is controlled to push the first electrode unit to the target stacking position;

[0227] The air intake is controlled to draw in air so as to adsorb the first electrode unit covering the air intake.

[0228] In this embodiment, the first electrode unit is the first electrode unit to be stacked. When the first electrode unit falls, the support plate extends from the initial position to the receiving position, so that the first electrode unit is stacked on the support member of the support plate. After the limiting component pushes the first electrode unit to the target stacking position, the suction hole on the support member is controlled to suck in air to adsorb the first electrode unit. In this way, when the second electrode unit falls on the first electrode unit and the limiting component pushes the first electrode unit and the second electrode unit to move, the first electrode unit will not move due to the adsorption of the suction hole, while the second electrode unit will move with the limiting component because it does not have the adsorption of the suction hole. This makes the second electrode unit aligned with the first electrode unit, achieving the purpose of electrode shaping.

[0229] In one embodiment of this application, the controller 802 is further configured to: disconnect the connection between the third electrode unit and other electrode units when the number of electrode units stacked on the carrier plate is a preset threshold, wherein the third electrode unit is the last electrode unit stacked on the carrier plate, and the other electrode units refer to the electrode units in the anode strip that are not stacked on the carrier plate.

[0230] The air intake hole is controlled to stop intake, and the support plate is controlled to retract to the initial position, so that the electrode units stacked on the support plate fall into the stacking platform below the support plate.

[0231] In this embodiment, when the number of electrode units stacked on the carrier plate is a preset threshold, the connection between the third electrode unit and other electrode units is cut off; the air intake hole is controlled to stop air intake, and the carrier plate is controlled to retract to the initial position, so that the electrode units stacked on the carrier plate fall into the stacking platform below the carrier plate. In this way, a set of neatly stacked electrode units is obtained for use in the subsequent cell manufacturing process.

[0232] It should be noted that the specific structure and working principle of the battery stacking equipment 801 can be found in Figures 2 and 6, and can be referred to the above description, which will not be repeated here.

[0233] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0234] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0235] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0236] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatuses, devices, and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0237] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for battery lamination, applied to a battery lamination device, the battery lamination device comprising a lamination mechanism for laminating an anode tape, the lamination mechanism comprising a carrier plate and a limiting assembly movable on the carrier plate, the anode tape comprising a plurality of cathode sheets arranged at intervals, the anode tape being folded at a folding position with intervals between adjacent cathode sheets, to obtain a plurality of sheet units, each sheet unit comprising one cathode sheet, each sheet unit being laminated to the carrier plate of the lamination mechanism, the method comprising: obtaining a target offset distance of a first sheet unit of the anode tape relative to a first reference position, the first reference position being a reference position set for the anode tape in a tape running stage; obtaining a target lamination position of the first sheet unit according to the target offset distance and a second reference position, the second reference position being a reference position set for lamination of a sheet unit of the anode tape on the carrier plate; if the first sheet unit is a first laminated sheet unit, controlling the limiting assembly to push the first sheet unit to move to the target lamination position when the first sheet unit is laminated to the carrier plate; and after controlling the limiting assembly to push the first sheet unit to move to the target lamination position, the method further comprising: controlling the limiting assembly to push a second sheet unit of the anode tape to align with the first sheet unit when the second sheet unit is laminated to the first sheet unit. The anode tape comprises anode sheets and separators arranged on both sides of the anode sheets, a width of the separator in a first direction is greater than a width of the anode sheet in the first direction, the first direction being parallel to a fold line formed by the folding. The target offset distance is an offset distance of an edge of the anode sheet relative to the first reference position. The battery lamination device further comprises a first detection unit and a second detection unit.

2. The battery lamination method of claim 1, wherein, The method of obtaining the target offset distance of the first sheet unit of the anode tape relative to the first reference position comprises: obtaining a first offset distance detected by the first detection unit and a second offset distance detected by the second detection unit, the first offset distance being a distance between an edge of an anode sheet in the first sheet unit and an edge of a separator, the second offset distance being a second offset distance of the edge of the separator in the first sheet unit relative to the first reference position; and taking a sum of the first offset distance and the second offset distance as the target offset distance. The method of obtaining the target lamination position of the first sheet unit according to the target offset distance and the second reference position comprises: offsetting the target offset distance from the second reference position to obtain the target lamination position, the target lamination position being a lamination area, a width of the lamination area in the first direction being determined according to a width of the anode sheet in the first direction.

3. The battery lamination method of claim 1 or 2, wherein, The limiting assembly comprises a first limiting member and a second limiting member arranged oppositely along the first direction. ​ 4. The battery lamination method of claim 3, wherein, ​ ​ ​ ​ 5. The battery lamination method of claim 3, wherein, ​ ​ 6. The battery lamination method of claim 3, wherein, ​ The control of the limiting assembly pushing the first pole piece unit to move to the target stacking position comprises: The control of the first limiting piece and the second limiting piece pushing the first pole piece unit to move to the target stacking position; After the control of the limiting assembly pushing the first pole piece unit to move to the target stacking position, the method further comprises: The control of the first limiting piece and the second limiting piece respectively retreating to the first position, wherein the distance between the first limiting piece and the second limiting piece retreating to the first position is greater than or equal to the width of the diaphragm.

7. The battery lamination method of claim 1, wherein, The bearing plate is provided with an air suction hole; If the first pole piece unit is the first pole piece unit to be stacked, in the case that the first pole piece unit is stacked on the bearing plate, the control of the limiting assembly pushing the first pole piece unit to move to the target stacking position comprises: If the first pole piece unit is the first pole piece unit to be stacked, in the case that the first pole piece unit falls, the control of the bearing plate extending from the initial position to the receiving position so that the first pole piece unit is stacked on the bearing plate; The control of the limiting assembly pushing the first pole piece unit to move to the target stacking position; The control of the air suction hole to suck air to adsorb the first pole piece unit covering on the air suction hole.

8. The battery stacking method according to claim 7, further comprising: In the case that the number of pole piece units stacked on the bearing plate is a preset threshold value, cutting off the connection between the third pole piece unit and other pole piece units, the third pole piece unit being the last pole piece unit stacked on the bearing plate, and the other pole piece units being the pole piece units in the anode strip not stacked on the bearing plate; The control of the air suction hole to stop sucking air, and the control of the bearing plate to retract to the initial position so that the pole piece units stacked on the bearing plate fall into the stacking table below the bearing plate.

9. A battery stacking device applied to a battery stacking equipment, the battery stacking equipment comprising a stacking mechanism for stacking an anode strip, the stacking mechanism comprising a bearing plate and a limiting assembly movable on the bearing plate, the anode strip being provided with a plurality of cathode sheets at intervals, the anode strip being folded at intervals between adjacent cathode sheets as folding positions to obtain a plurality of pole piece units, each pole piece unit comprising one cathode sheet, and each pole piece unit being stacked on the bearing plate of the stacking mechanism, the battery stacking device comprising: A first acquisition module for acquiring a target offset distance of a first pole piece unit of the anode strip relative to a first reference position, the first reference position being a reference position set for the anode strip in a strip running stage; A second acquisition module for obtaining a target stacking position of the first pole piece unit according to the target offset distance and a second reference position, the second reference position being a reference position set for the pole piece units of the anode strip when stacked on the bearing plate. The first control module is configured to, if the first pole piece unit is a first pole piece unit to be stacked, control the limiting assembly to push the first pole piece unit to move to the target stacking position when the first pole piece unit is stacked on the bearing plate. 10.A battery lamination system, comprising a battery lamination device and a controller, the battery lamination device comprising a stacking mechanism for stacking an anode tape, the stacking mechanism comprising a bearing plate and a limiting assembly movable on the bearing plate, the anode tape having a plurality of cathode sheets arranged at intervals thereon, the anode tape being folded at intervals between adjacent cathode sheets as folding positions to obtain a plurality of pole piece units, each of the pole piece units comprising one cathode sheet, each of the pole piece units being stacked on the bearing plate of the stacking mechanism, the controller being configured to: obtain a target offset distance of a first pole piece unit of the anode tape relative to a first reference position, the first reference position being a reference position set for the anode tape in a tape running stage; obtain a target stacking position of the first pole piece unit according to the target offset distance and a second reference position, the second reference position being a reference position set for pole piece units of the anode tape when stacked on the bearing plate; if the first pole piece unit is a first pole piece unit to be stacked, control the limiting assembly to push the first pole piece unit to move to the target stacking position when the first pole piece unit is stacked on the bearing plate.

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