A battery cell cutting device and testing system

Abstract

This application discloses a battery cell cutting device and a detection system. The battery cell cutting device includes a voltage detection mechanism and a cutting mechanism. The voltage detection mechanism is used to detect the voltage of the battery cell and includes: multiple pairs of conductive parts arranged along a first direction, with two conductive parts of the same pair arranged along a second direction, the first and second directions intersecting; any two conductive parts from the multiple pairs of conductive parts are respectively used to contact the positive and negative electrode tabs of the battery cell; the cutting mechanism is used to cut the battery cell into multiple battery cell blocks when the voltage is below a threshold. Therefore, the voltage detection mechanism can use any two conductive parts from the multiple pairs of conductive parts to detect the voltage of different types of battery cells, and the cutting mechanism cuts the battery cell into multiple battery cell blocks when the voltage is below a threshold, thereby improving the safety and reliability of the battery cell cutting process.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cell cutting device and testing system. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] A battery device includes one or more battery cells. During the manufacturing or recycling of these cells, they need to be cut to facilitate subsequent testing. However, existing cutting equipment may pose safety hazards when cutting battery cells, meaning the equipment's reliability may be insufficient. Utility Model Content

[0004] The main objective of this application is to provide a battery cell cutting device and inspection system, which aims to solve the technical problems existing in the prior art.

[0005] To address the aforementioned problems, this application provides a battery cell cutting device. The device includes a voltage detection mechanism and a cutting mechanism. The voltage detection mechanism detects the voltage of the battery cell and includes: multiple pairs of conductive portions arranged along a first direction; two conductive portions of the same pair of conductive portions arranged along a second direction, the first and second directions intersecting; any two conductive portions from the multiple pairs of conductive portions are respectively used to contact the positive and negative electrode tabs of the battery cell; the cutting mechanism, when the voltage is below a threshold, is used to cut the battery cell into multiple battery cell blocks. Therefore, the voltage detection mechanism can utilize any two conductive portions from the multiple pairs of conductive portions to detect the voltage of different battery cell models, and the cutting mechanism cuts the battery cell into multiple battery cell blocks when the voltage is below the threshold, reducing the risk of battery cell fires caused by the cutting mechanism cutting batteries with unsatisfactory discharge, thereby improving the safety and reliability of the battery cell cutting process.

[0006] In some embodiments, the voltage detection mechanism includes two pairs of conductive parts, wherein one conductive part in one pair of conductive parts and one conductive part in the other pair of conductive parts are respectively used to contact the positive and negative electrode tabs of the battery cell. Thus, the contact between one conductive part in one pair of conductive parts and one conductive part in the other pair of conductive parts with the positive and negative electrode tabs of the battery cell is adaptable to battery cells where the positive and negative electrode tabs protrude from different directions on the electrode sheet.

[0007] In some embodiments, the voltage detection mechanism further includes a driving component, which is used to: drive at least one of the same pair of conductive parts to move relative to the other to adjust the distance between the two conductive parts; and / or drive one pair of conductive parts to move relative to another pair of conductive parts to adjust the distance between the two pairs of conductive parts; and / or drive multiple pairs of conductive parts to move relative to the battery cell to adjust their distance from the positive electrode tab and the negative electrode tab. Thus, by driving at least one of the same pair of conductive parts to move relative to the other, and / or driving one pair of conductive parts to move relative to another pair of conductive parts, and / or driving multiple pairs of conductive parts to move relative to the battery cell, movement between the same pair of conductive parts and different pairs of conductive parts can be achieved through a simple product design, making it easier to adapt to different models of battery cells, improving the versatility of the voltage detection mechanism, and further reducing the difficulty of voltage detection of battery cells.

[0008] In some embodiments, the voltage detection mechanism further includes a connecting portion for connecting the driving component and each pair of conductive parts. Thus, the voltage detection mechanism includes a connecting portion for connecting the driving component and each pair of conductive parts, thereby improving the relative stability between the driving component and each pair of conductive parts, and facilitating improved stability of each pair of conductive parts during movement, further reducing the difficulty of voltage detection of the battery cell by the voltage detection mechanism.

[0009] In some embodiments, the cutting mechanism includes a cutter and a base, the base being used to support the battery cell, the cutter and the base being disposed opposite to each other, and the cutter being used to cut the battery cell supported on the base. Thus, the cutter and the base are disposed opposite to each other, and the cutter is used to cut the battery cell supported on the base, which reduces the complexity of the cutting mechanism and improves the cutting efficiency of the cutting mechanism in cutting battery cells.

[0010] In some embodiments, at least a portion of the outer surface of the cutting tool is insulated. This insulation reduces the risk of electrical conduction between the cutting tool and the battery cell during the cutting process, further reducing the risk of battery cell fires caused by the cutting mechanism, thereby improving the safety and reliability of the battery cell cutting equipment during the cutting process.

[0011] In some embodiments, the cutting tool includes a cutting edge, and the distance between the cutting edge and the base decreases from large to small in the direction in which the cutting edge extends. This gradual decrease in the distance between the cutting edge and the base in the direction of the cutting edge extension allows the cutting tool to first contact the battery cell with the portion of the cutting edge with the smaller distance from the base during the cutting process, reducing the risk of damage due to excessive stress during cutting.

[0012] In some embodiments, the base includes a groove or recessable portion for accommodating at least a portion of the cutting tool. Thus, the groove or recessable portion for accommodating at least a portion of the cutting tool reduces interference between the cutting tool and the base when cutting the battery cell, thereby reducing the risk of damage to the cutting tool during cell cutting.

[0013] In some embodiments, the base includes a fixed cutter corresponding to the cutting tool. Thus, the fixed cutter and the cutting tool work together to cut the battery cell, further improving the cutting efficiency of the battery cell.

[0014] In some embodiments, the base further includes a dust collection box housed within the groove for collecting residues generated during the cell cutting process. Thus, the dust collection box, housed within the groove, collects residues generated during cell cutting for easy cleaning or removal, reducing the risk of fire or explosion caused by residues and minimizing the health effects of operators inhaling residues. This improves the safety and reliability of the cell cutting equipment during the cell cutting process.

[0015] In some embodiments, the bottom of the groove is wider than the opening. This wider bottom allows for a larger dust collection box, making it easier to collect residues generated during the cell cutting process and to clean those residues.

[0016] In some embodiments, the battery cell cutting equipment includes a feeding mechanism for conveying the battery cell a distance of a first width, wherein the first width is a preset width, so that the cutting mechanism cuts the battery cell to obtain a battery cell block having the first width. Thus, the feeding mechanism can flexibly adjust the feeding width as needed to obtain battery cell blocks of the corresponding width in a simple manner, facilitating subsequent processing of the battery cell blocks and improving the automation level of the battery cell cutting equipment.

[0017] In some embodiments, the cell cutting device includes a rotating mechanism for adjusting the angle of a cell block having the first width. Thus, the rotating mechanism adjusts the angle of the cell block having the first width to facilitate a secondary cutting of the cell after angle adjustment, thereby obtaining a cell block of the corresponding shape.

[0018] In some embodiments, the feeding mechanism is further configured to convey the angled battery cell block a distance of a first length, wherein the first length is a preset length, so that the cutting mechanism cuts the angled battery cell block to obtain a battery cell block having the first width and the first length. Thus, the feeding mechanism can flexibly adjust the feeding width as needed, obtaining a smaller battery cell block after secondary cutting.

[0019] In some embodiments, the adjusted battery cell blocks are multiple. The angles of multiple battery cell blocks are adjusted at once by a rotating mechanism, so that multiple battery cell blocks can be cut simultaneously during secondary cutting, improving the efficiency of battery cell cutting.

[0020] In some embodiments, the cell cutting equipment includes a sealed outer casing forming a sealed space, within which the voltage detection mechanism and the cutting mechanism are located. Thus, by placing the voltage detection mechanism and the cutting mechanism within the sealed space, the sealed outer casing allows for a specific cutting environment during cell processing, reducing the risk of combustion or explosion, and minimizing the impact on subsequent testing results of the cut cell blocks.

[0021] In some embodiments, the cell cutting equipment includes a pneumatic control mechanism, which includes an air inlet and an air outlet located within the sealed space. This arrangement allows for adjustments to the air pressure and / or characteristic gas content within the sealed space via the air inlet and outlet.

[0022] In some embodiments, at least one of the air inlet and the air outlet is provided with a filter screen. This reduces the risk of fire or explosion caused by residues generated during the cell cutting process being sucked out of the sealed space through the air outlet, and also reduces the health effects caused by operators inhaling residues. This improves the safety and reliability of the cell cutting equipment during the cell cutting process.

[0023] In some embodiments, the battery cell cutting equipment includes a pressure detection device located within the sealed space. This device detects the internal pressure of the sealed space. This allows for real-time control of the internal pressure, adjusting and maintaining standard pressure conditions for voltage cutting, reducing the probability of battery cell combustion under abnormal voltage, and further improving the safety and reliability of the battery cell cutting process.

[0024] In some embodiments, the battery cell cutting equipment includes an oxygen detection device located within the sealed space, which is used to detect the oxygen content in the sealed space. Because the battery cell may heat up during the cutting process, an increase in oxygen content could lead to cell combustion. Detecting and controlling the oxygen content during the cutting process not only reduces the probability of combustion when the battery cell comes into contact with oxygen, but also reduces the probability of combustion when electrolyte gas encounters oxygen, further improving the safety and reliability of the battery cell cutting equipment during the cutting process.

[0025] In some embodiments, the battery cell cutting equipment includes a temperature detection element located within the sealed space, which is used to detect the temperature of the sealed space. Therefore, by detecting the temperature of the sealed space, the ambient temperature during the battery cell cutting process can be controlled, as well as the rate of temperature rise of the battery cell during cutting, reducing the risk of combustion caused by overheating and further improving the safety and reliability of the battery cell cutting equipment during the cutting process.

[0026] In some embodiments, the cell cutting equipment includes an electrolyte gas detection device located within the sealed space. This device detects the electrolyte gas content within the sealed space. This allows for timely intervention when the electrolyte gas content exceeds a threshold. For example, the cell cutting equipment may issue a safety alarm, or it may fill the sealed space with an inert gas such as nitrogen to reduce the oxygen content. This reduces the probability of the electrolyte gas igniting upon contact with oxygen, further improving the safety and reliability of the cell cutting process.

[0027] In some embodiments, the sealed outer cover includes at least one observation window for observing the interior of the sealed space. The observation window is configured to be openable or closed. Thus, the observation window, by allowing observation of the interior of the sealed space and being configured to be openable or closed, facilitates the operator's monitoring of the cell cutting progress and facilitates the inspection and maintenance of the internal mechanisms of the cell cutting equipment through the observation window.

[0028] To address the aforementioned issues, this application provides a testing system comprising a testing device and a cell cutting device as described above. The testing device is used to perform electrolyte testing on one or more cell blocks obtained by the cell cutting device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a first structural schematic diagram of a cell cutting device according to one or more embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the structure of a battery cell according to one or more embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a voltage detection mechanism according to one or more embodiments of this application;

[0033] Figure 4 A first structural schematic diagram of a cutting mechanism according to one or more embodiments of this application;

[0034] Figure 5 This is a second structural schematic diagram of a cutting mechanism according to one or more embodiments of this application;

[0035] Figure 6 This is a second structural schematic diagram of a cell cutting device according to one or more embodiments of this application;

[0036] Figure 7 This is a third structural schematic diagram of a cell cutting device according to one or more embodiments of this application;

[0037] Figure 8 This is a fourth structural schematic diagram of a cell cutting device according to one or more embodiments of this application;

[0038] Figure 9 This is a schematic diagram of the air outlet of a pneumatic control mechanism according to one or more embodiments of this application.

[0039] Reference numerals: 10, Battery cell cutting equipment; 20, Battery cell; 21, Battery cell block; 22, Positive electrode tab; 23, Negative electrode tab; 100, Voltage detection mechanism; 110, Conductive part; 111, Conductive part; 120, Driving component; 130, Connecting part; 200, Cutting mechanism; 210, Cutting tool; 211, Blade; 220, Base; 221, Groove; 222, Recessable part; 230, Fixed cutter; 240, Dust collection box; 300, Feeding device. Mechanism; 400, Rotating mechanism; 500, Sealed outer cover; 510, Sealed space; 520, Observation window; 600, Air pressure control mechanism; 610, Air inlet; 620, Air outlet; 630, Impurity filter; 710, Air pressure detection element; 720, Oxygen detection element; 730, Temperature detection element; 740, Electrolyte gas detection element; 810, Transfer mechanism; 820, Loading mechanism; 830, Bag sealing mechanism; X, First direction; Y, Second direction. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0049] Battery devices comprise one or more cells. During cell manufacturing, the impregnation process is prone to uneven electrolyte impregnation within the cell. Furthermore, with increasing demand for cells, cell height is also gradually increasing, making electrolyte creep more difficult and impregnation challenging. This leads to uneven additive distribution, a risk of lithium plating, and reduced cycle performance and lifespan. Therefore, it is necessary to test the uniformity of electrolyte impregnation during cell manufacturing. In related technologies, this is mainly achieved by manually disassembling the cell and spreading it out to form electrode sheets. These sheets are then cut using a blade to obtain localized electrode plates, which are then centrifuged to obtain the electrolyte within. The composition of the electrolyte is then tested. However, this method of disassembly consumes a lot of manpower and takes a long time; during the disassembly process, the spread-out electrode sheets come into contact with a large amount of air, resulting in the evaporation of a large amount of low-boiling-point solvents, which leads to large test errors; the local electrode sheets cannot replace the whole cell, resulting in low reliability of the results; and the amount of electrolyte in the local centrifugation is small, which cannot cover the electrolyte requirements of conventional test items.

[0050] To address the technical problems existing in related technologies, this application provides a battery cell cutting device, which includes a voltage detection mechanism and a cutting mechanism. The voltage detection mechanism detects the voltage of the battery cell to be cut, and the cutting mechanism cuts the battery cell to be cut into multiple battery cell blocks. This reduces the risk of battery cell fire caused by the cutting mechanism cutting battery cells whose discharge does not meet expectations, thereby improving the safety and reliability of the battery cell cutting device during the battery cell cutting process.

[0051] Specifically, see Figure 1 , Figure 1 This is a first structural schematic diagram of a cell cutting device according to one or more embodiments of this application.

[0052] The battery cell cutting device 10 includes a voltage detection mechanism 100 and a cutting mechanism 200. The voltage detection mechanism 100 is used to detect the voltage of the battery cell 20. The cutting mechanism 200 is used to cut the battery cell 20 into multiple battery cell blocks 21 when the voltage is lower than a threshold.

[0053] The battery cell 20 may include, but is not limited to, a bare battery cell. The battery cell 20 may be manufactured in a manner including, but not limited to, stacked and wound types. The battery cell 20 is the component in a single battery cell where electrochemical reactions occur. The battery cell 20 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative electrode tabs may be located together at one end of the main body or at opposite ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop. In this embodiment, the battery cell 20 may be a battery cell 20 used during manufacturing or a battery cell 20 recycled after use; that is, the battery cell 20 may include a battery cell 20 that has been impregnated with electrolyte and charged, or a battery cell 20 that has not been impregnated with electrolyte.

[0054] The battery cell cutting device 10 may include a controller, and the threshold may include a preset voltage threshold. The value of the threshold can be set according to actual conditions. For example, the threshold may be between 0.5V and 2.7V. Specifically, the threshold may include, but is not limited to, 0.5V, 0.6V, 0.7V, 0.8V, 0.9V, 1V, 1.5V, 2V, 2.5V, or 2.7V, etc. The specific shape and structure of the voltage detection mechanism 100 can be set according to actual conditions. The voltage detection mechanism 100 can be used to contact the tabs of the battery cell 20 so that the voltage detection mechanism 100 and the battery cell 20 form a current loop, and then the voltage of the battery cell 20 can be detected through the voltage detection mechanism 100. The voltage detection mechanism 100 may include a voltage calculator, which can be used to calculate the voltage of the battery cell 20. A preset voltage threshold can also be set on the voltage calculator. When the voltage of the battery cell 20 detected by the voltage detection mechanism 100 is greater than the preset voltage threshold, the detection result can be fed back to the controller of the battery cell cutting equipment 10. The controller then controls the battery cell cutting equipment 10 to stop operating, mitigating the risk of combustion and fire after cutting due to insufficient discharge of the battery cell 20. When the voltage of the battery cell 20 detected by the voltage detection mechanism 100 is less than or equal to the preset voltage threshold, the detection result can be fed back to the controller of the battery cell cutting equipment 10. The controller then controls the battery cell cutting equipment 10 to continue performing subsequent operations. The voltage detection mechanism 100 can directly detect the voltage of the battery cell 20 at the cutting mechanism 200, or it can detect the voltage of the battery cell 20 at other locations before the cutting mechanism 200, depending on the actual situation. In some other embodiments, the cell cutting device 10 may also include a shell removal mechanism and / or a discharge mechanism. When the cell 20 includes a shell, the shell removal mechanism can remove the shell of the cell 20 to obtain a bare cell 20. The discharge mechanism can be used to discharge the cell 20 to obtain a cell 20 with a voltage lower than a threshold.

[0055] The cutting mechanism 200 can cut a battery cell 20 with a voltage below a threshold into multiple battery cell blocks 21. These battery cell blocks 21 can be formed by directly cutting the battery cell 20, i.e., cutting the battery cell 20 without separating it into individual electrode pieces. For example, the cutting mechanism 200 can cut the battery cell 20 into equal parts, such as cutting it into 3, 6, or 9 equal parts of battery cell blocks 21. The specific shape and structure of the cutting mechanism 200 can be set according to actual conditions; for example, the cutting mechanism 200 can have a cutter to cut the battery cell 20 into multiple battery cell blocks 21. The number of cutters can be set according to the actual situation. For example, when there is only one cutter, the battery cell 20 can be cut into multiple battery cell blocks 21 by other mechanisms in conjunction with the cutting mechanism 200. For example, the battery cell 20 to be cut can be transferred to the cutting mechanism 200, and then the cutter can cut the battery cell 20 once. After the first cut is completed, the battery cell 20 can be moved to a predetermined position, and then the battery cell 20 can be cut a second time. This action is repeated to cut the battery cell 20 into multiple battery cell blocks 21. For example, when there are multiple cutters, the battery cell 20 can be transferred to a predetermined position, and multiple cutters can work simultaneously to cut the battery cell 20 into multiple battery cell blocks 21 at one time. Or, when there are multiple cutters, the battery cell 20 can be transferred to a predetermined position and cut into multiple battery cell blocks 21 in conjunction with the cutting mechanism 200.

[0056] Through the above implementation method, the voltage detection mechanism 100 is used to detect the voltage of the battery cell 20, and the cutting mechanism 200 cuts the battery cell 20 into multiple battery cell blocks 21 when the voltage is lower than the threshold. This reduces the risk of battery cell 20 catching fire and burning caused by the cutting mechanism 200 cutting battery cell 20 whose discharge does not meet expectations, thereby improving the safety and reliability of the battery cell cutting equipment 10 in the process of cutting battery cell 20 and improving the reliability of the battery cell cutting equipment 10.

[0057] See Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery cell according to one or more embodiments of this application.

[0058] The voltage detection mechanism 100 includes a pair of conductive parts 110, which are respectively used to contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20. The pair of conductive parts 110 may include two conductive parts 111. Correspondingly, the two conductive parts 111 of the same pair of conductive parts 110 can be a first conductive part and a second conductive part, respectively. The first and second conductive parts are spaced apart. One of the first and second conductive parts contacts the positive electrode tab 22, and the other contacts the negative electrode tab 23, so that the battery cell 20 and the voltage detection mechanism 100 together form a current loop, facilitating the voltage detection mechanism 100 to detect the voltage of the battery cell 20, reducing the difficulty of voltage detection, and improving the efficiency of voltage detection. The positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 can be located on the same side or opposite sides of the battery cell 20. Correspondingly, the first and second conductive parts of the same pair of conductive parts 110 can be located on the same side or opposite sides of the battery cell 20 to accommodate different types of battery cells 20. The shape and structure of the conductive part 111 can be set according to the actual situation. For example, the material of the conductive part 111 can include metals with good conductivity such as copper or gold, and the shape of the conductive part 111 can be, but is not limited to, rectangle, square, triangle, circle, etc. For example, the conductive part 111 can be rectangular, the width of the conductive part 111 can be between 90mm and 110mm, the thickness of the conductive part 111 can be between 140mm and 160mm, and the thickness of the conductive part 111 can be between 5mm and 15mm, etc.

[0059] Combination Figure 3 , Figure 3 This is a schematic diagram of the structure of a voltage detection mechanism according to one or more embodiments of this application.

[0060] The voltage detection mechanism 100 includes multiple pairs of conductive parts 110, wherein one conductive part 111 of one pair of conductive parts 110 and one conductive part 111 of another pair of conductive parts 110 are respectively used to contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20. Specifically, the multiple pairs of conductive parts 110 may include two pairs of conductive parts 110, three pairs of conductive parts 110, four pairs of conductive parts 110, or other more pairs of conductive parts 110. Each pair of conductive parts 110 may include two conductive parts 111, namely a first conductive part and a second conductive part. The first and second conductive parts of the same pair of conductive parts 110 can exist in any form. For example, the first and second conductive parts of the same pair of conductive parts 110 may be arranged in the same direction, while different pairs of conductive parts 110 may be arranged in another direction. In this embodiment, the first conductive part of the first pair of conductive parts 110 may contact the positive electrode tab 22 of the battery cell 20, and the second conductive part of the second pair of conductive parts 110 may contact the negative electrode tab 23 of the battery cell 20. Alternatively, the second conductive portion of the first pair of conductive portions 110 may contact the negative electrode tab 23 of the battery cell 20, and the first conductive portion of the second pair of conductive portions 110 may contact the positive electrode tab 22 of the battery cell 20. This allows for the detection of the voltage of the battery cell 20 by having different pairs of conductive portions 110 contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 respectively, further reducing the difficulty of voltage detection and improving voltage detection efficiency. Alternatively, in other embodiments, only the first conductive portion of the same pair of conductive portions 110 may contact the positive electrode tab 22 of the battery cell 20, and the second conductive portion may contact the negative electrode tab 23 of the battery cell 20.

[0061] Furthermore, multiple pairs of conductive portions 110 are arranged along the first direction X, and the two conductive portions 111 of the same pair of conductive portions 110 are arranged along the second direction Y, wherein the first direction X and the second direction Y intersect. For example... Figure 3As shown, the voltage detection mechanism 100 includes two pairs of conductive parts 110, which are arranged at intervals in a first direction X. Each pair of conductive parts 110 includes two conductive parts 111, namely a first conductive part and a second conductive part. The first and second conductive parts of the same pair of conductive parts 110 are arranged along a second direction Y. The first direction X and the second direction Y can be perpendicular to each other. When performing voltage detection on the battery cell 20, if the arrangement direction of the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 is parallel to the first direction X, that is, when the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 are on the same side of the battery cell 20, the first and second conductive parts in the same pair of conductive parts 110 are respectively used to contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20. When the arrangement direction of the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 intersects with the first direction X, that is, when the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20 are on opposite sides of the battery cell 20, the first conductive part in one pair of conductive parts 110 contacts the positive electrode tab 22 of the battery cell 20, and the second conductive part in another pair of conductive parts 110 contacts the negative electrode tab 23 of the battery cell 20. Thus, by configuring multiple pairs of conductive parts 110 according to the rules, the voltage detection mechanism 100 can be adapted to more models of battery cells 20, improve the versatility of the voltage detection mechanism 100, further reduce the difficulty of voltage detection of the battery cell 20, and improve the voltage detection efficiency.

[0062] Furthermore, any two conductive portions 111 of the plurality of conductive portions 110 can also be used to contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20, respectively. For example, when there is a... Figure 3 When two pairs of conductive parts 110 are shown, there are a total of four conductive parts 111 in the two pairs of conductive parts 110, and any two of the four conductive parts 111 can be coupled to make contact with the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20, respectively.

[0063] Different models of battery cells 20 often have vastly different designs. For example, the positive electrode tab 22 and the negative electrode tab 23 may differ in length, thickness, distance between them, and direction of protrusion from the electrode plate. Therefore, when different models of battery cells 20 need voltage detection, voltage detection is performed using two conductive parts 111 in multiple pairs of conductive parts 110 that match the positive and negative electrodes of the battery cell 20. This allows the voltage detection mechanism 100 to be adapted to different models of battery cells, improving the versatility of the voltage detection mechanism 100.

[0064] although Figure 3Only two pairs of conductive parts 110 are shown, but those skilled in the art will understand that three or more pairs can be included as needed. More pairs of conductive parts 110 can improve the robustness of the device. For example, one or more pairs of conductive parts 110 can be used for redundancy, so that when one pair of conductive parts 110 fails, another pair of conductive parts 110 can take its place in collecting voltage. Furthermore, more pairs of conductive parts 110 can also improve the detection efficiency of the device. For example, multiple pairs of conductive parts 110 can enable the simultaneous detection of multiple battery cells, i.e., the parallel detection of multiple battery cells.

[0065] Furthermore, the voltage detection mechanism 100 also includes a drive component 120, which may include, but is not limited to, a drive motor, such as a stepper motor, rotary motor, lead screw motor, etc. The drive component 120 can be directly connected to at least one pair of conductive parts 110 simultaneously, or indirectly connected to at least one pair of conductive parts 110 through other components. The drive component 120 can be used to drive the two conductive parts 111 of the same pair of conductive parts 110 to move synchronously, or drive the two conductive parts 111 of the same pair of conductive parts 110 to move separately, or drive different pairs of conductive parts 110 to move synchronously or separately, etc. This allows for the simple implementation of movement between the same pair of conductive parts 110 and different pairs of conductive parts 110, making it easier to adapt to different models of battery cells 20, improving the versatility of the voltage detection mechanism 100, and further reducing the difficulty of voltage detection for the battery cell 20.

[0066] In one embodiment, the driving member 120 is used to drive at least one of the same pair of conductive parts 110 to move relative to the other, thereby adjusting the distance between the two conductive parts 111. The driving member 120 can act on at least two conductive parts 111 of the same pair of conductive parts 110. For example, the same pair of conductive parts 110 may include a first conductive part and a second conductive part. One of the first conductive part and the second conductive part of the same pair of conductive parts 110 is fixed, and the driving member 120 can drive the other of the first conductive part and the second conductive part of the same pair of conductive parts 110 to move, thereby adjusting the distance between the first conductive part and the second conductive part of the same pair of conductive parts 110. Alternatively, the driving member 120 can simultaneously drive the first conductive part and the second conductive part of the same pair of conductive parts 110 to move relative to or away from each other, thereby adjusting the distance between the first conductive part and the second conductive part of the same pair of conductive parts 110.

[0067] In one embodiment, a pair of conductive portions 110 is driven to move relative to another pair of conductive portions 110 to adjust the distance between the two pairs of conductive portions 110. The driving member 120 can act on different pairs of conductive portions 110. Exemplarily, at least one of the different pairs of conductive portions 110 is fixed, and the driving member 120 can drive the remaining pairs of conductive portions 110 to move, thereby adjusting the distance between the different pairs of conductive portions 110. Alternatively, the driving member 120 can simultaneously drive different pairs of conductive portions 110 to move relative to or away from each other, thereby adjusting the distance between the different pairs of conductive portions 110.

[0068] In one embodiment, multiple pairs of conductive portions 110 are driven to move relative to the battery cell 20 to adjust their distance from the positive electrode tab 22 and the negative electrode tab 23. The driving member 120 can simultaneously drive at least one of the multiple pairs of conductive portions 110 to move relative to the battery cell 20, thereby adjusting the spacing between at least one of the multiple pairs of conductive portions 110 and the battery cell 20, so that the first and second conductive portions of at least one pair of conductive portions 110 can contact the positive electrode tab 22 and the negative electrode tab 23 of the battery cell 20.

[0069] Furthermore, the voltage detection mechanism 100 also includes a connecting portion 130 for connecting the driving component 120 and each pair of conductive portions 110. The specific shape and structure of the connecting portion 130 can be set according to actual conditions. The driving component 120 can be fixedly connected to the connecting portion 130, and the driving component 120 can drive the connecting portion 130 to move in three-dimensional space. For example, the driving component 120 can drive the connecting portion 130 to translate vertically, horizontally, or vertically, and the driving component 120 can also drive the connecting portion 130 to rotate around an axis, etc. Each pair of conductive portions 110 can be slidably connected to the connecting portion 130. For example, a slide rail can be provided on the connecting portion 130, and each pair of conductive portions 110 can be connected to the slide rail via a slider, thereby allowing each pair of conductive portions 110 to be slidably connected to the connecting portion 130 via the slide rail and the slider. The connecting part 130 connects the driving component 120 and each pair of conductive parts 110 to improve the relative stability between the driving component 120 and each pair of conductive parts 110, and to facilitate the improvement of the stability of each pair of conductive parts 110 during movement, thereby further reducing the difficulty of voltage detection of the cell 20 by the voltage detection mechanism 100.

[0070] See Figure 4 , Figure 4 A first structural schematic diagram of a cutting mechanism according to one or more embodiments of this application.

[0071] The cutting mechanism 200 includes a cutter 210 and a base 220. The base 220 supports the battery cell 20. The cutter 210 and the base 220 are arranged opposite to each other. The cutter 210 is used to cut the battery cell 20 supported on the base 220. The specific shape and structure of the base 220 can be set according to actual conditions. The cutter 210 can be set according to actual conditions. The cutter 210 can be arranged opposite to and spaced apart from the side surface of the base 220 used to support the battery cell 20. When the battery cell 20 is supported on the base 220, the cutter 210 can approach to cut the battery cell 20. The cutting mechanism 200 may also include a drive motor, which can be connected to the cutter 210. The drive motor can drive the cutter 210 to approach or move away from the battery cell 20 supported on the base 220. The pressure of the drive motor driving the cutter 210 to cut the battery cell 20 is adjustable. In some embodiments, the number of cutters 210 can be set according to actual conditions. For example, cutters 210 can be one, two, three, etc. When there are at least two cutters 210, the at least two cutters 210 can be arranged at a predetermined interval, and the at least two cutters 210 can approach each other simultaneously to cut the battery cell 20 supported on the base 220, thereby improving the cutting efficiency of the cutting mechanism 200 in cutting the battery cell 20. The hardness of the cutters 210 can be set according to actual conditions. For example, the hardness of the cutters 210 can be between 180Hv and 220Hv, between 190Hv and 210Hv, between 200Hv and 220Hv, between 190Hv and 200Hv, between 185Hv and 210Hv, between 200Hv and 210Hv, etc. Specifically, the hardness of the cutters 210 can include, but is not limited to, 180Hv, 190Hv, 200Hv, 210Hv, 220Hv, etc.

[0072] At least a portion of the outer surface of the cutting tool 210 is insulated. An insulating layer may be provided on the outer surface of the cutting tool 210. The material of the insulating layer can be determined according to actual conditions. For example, the insulating layer may include, but is not limited to, epoxy resin coating, polyurethane coating, silicone resin coating, polyimide coating, alumina, or silicon oxide, etc., thereby giving the cutting tool 210 electrical insulation properties. This reduces the risk of electrical conduction between the cutting tool 210 and the battery cell 20 during the cutting process, further reducing the risk of fire or combustion of the battery cell 20 caused by the cutting mechanism 200 cutting the battery cell 20, thus improving the safety and reliability of the battery cell cutting equipment 10 during the cutting process of the battery cell 20. In some other embodiments, the cutting tool 210 may also be entirely made of insulating material, or the cutting tool 210 may have an internal main body made of non-insulating material, with an insulating layer structure on the outer surface of the non-insulating main body coated with insulating material. The thickness of the insulation layer on the outer surface can be between 1mm and 10mm, 2mm and 10mm, 5mm and 10mm, 5mm and 7mm, or 1mm and 5mm, etc.

[0073] See Figure 4 and Figure 5 , Figure 5 This is a second structural schematic diagram of a cutting mechanism according to one or more embodiments of this application.

[0074] The cutting tool 210 includes a cutting edge 211, and the distance between the cutting edge 211 and the base 220 decreases from a large distance in the direction in which the cutting edge 211 extends. The cutting edge 211 is the sharper side of the cutting tool 210, that is, the side of the cutting tool 210 used to cut the battery cell 20. The cutting edge 211 can be straight, curved, wavy, serrated, or a combination of straight and curved shapes. For example, using... Figure 5 For example, the blade 211 is straight and can be tilted relative to the base 220. This allows the blade 210 to first contact the battery cell 20 with the part of the blade 211 that has the smallest distance from the base 220 during the cutting process, and then gradually allow other parts of the blade 211 to cut the battery cell 20. This reduces the risk of damage caused by excessive stress when the blade 210 cuts the battery cell 20. The tilt angle of the blade 211 can be between 3° and 10°, 4° and 10°, 5° and 10°, 6° and 10°, 3° and 8°, 5° and 8°, etc. Specifically, the tilt angle of the blade 211 can include, but is not limited to, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, etc. The length of the blade 211 can be determined according to the length of the battery cell 20 to be cut; for example, the length of the blade 211 can be slightly longer than the length of the battery cell 20.

[0075] In some embodiments, the base 220 includes a groove 221 or a recessable portion 222 for accommodating at least a portion of the cutter 210. Specifically, the base 220 may include a body, which includes a bearing plane for supporting the battery cell 20. The bearing plane may be the upper top surface of the body. The body also has a groove 221, the opening of which communicates with the bearing plane, and the groove 221 corresponds to the cutter 210. The shape of the groove 221 can be set according to actual conditions. The opening of the groove 221 communicates with the bearing plane, allowing a portion of the battery cell 20 to be located at the opening of the groove 221 when the battery cell 20 is supported on the bearing plane, and the groove 221 to correspond to the cutter 210. When the cutter 210 cuts the battery cell 20, the cutter 210 can gradually approach the bearing plane to cut the battery cell 20 from the side away from the bearing plane and gradually approach the side of the battery cell 20 facing the bearing plane, and can slightly extend beyond the bearing plane to reach into the groove 221, thereby realizing the cutting operation of the battery cell 20. In some embodiments, the number of cutters 210 and grooves 221 can be in a one-to-one correspondence. For example, there may be multiple cutters 210 and multiple grooves 221, and one cutter 210 may correspond to one groove 221 in a direction perpendicular to the bearing plane.

[0076] Alternatively, the main body may also have a recessable portion 222. The recessable portion 222 may have a certain degree of flexibility, allowing it to deform under external force and recover its deformation when the external force is removed. The recessable portion 222 may correspond to the cutting tool 210. The shape of the recessable portion 222 may be set according to actual conditions. The recessable portion 222 is embedded in the bearing plane, so that when the battery cell 20 is supported on the bearing plane, part of the battery cell 20 is located at the recessable portion 222, and the recessable portion 222 corresponds to the cutting tool 210. When the cutting tool 210 cuts the battery cell 20, the cutting tool 210 may gradually approach the bearing plane to cut the battery cell 20 from the side of the battery cell 20 away from the bearing plane and gradually approach the side of the battery cell 20 facing the bearing plane. It may also slightly exceed the bearing plane to deform the recessable portion 222, thereby realizing the cutting operation of the battery cell 20. This reduces interference between the cutting tool 210 and the base 220 when cutting the battery cell 20, and also reduces the risk of damage caused by the cutting tool 210 during cutting of the battery cell 20. In some embodiments, the number of cutting tools 210 and recessable portions 222 can be in a one-to-one correspondence. For example, there can be multiple cutting tools 210 and recessable portions 222, and one cutting tool 210 can correspond to one recessable portion 222 in a direction perpendicular to the bearing plane.

[0077] In some embodiments, the base 220 includes a fixed cutter 230, which corresponds to the cutter 210. The fixed cutter 230 is at least partially located within the groove 221 and connected to the body of the base 220. The side of the fixed cutter 230 facing the cutter 210 is flush with the bearing plane of the body. The specific shape of the fixed cutter 230 can be set according to actual conditions. For example, the fixed cutter 230 can be flat and fixed to the inner wall of the groove 221; or the fixed cutter 230 can be L-shaped, with its lateral portion embedded in the body of the base 220 and its longitudinal portion conforming to the inner wall of the groove 221. The fact that the side of the fixed cutter 230 facing the cutter 210 is flush with the bearing plane allows for the cutting of the battery cell 20 through the cooperation of the fixed cutter 230 and the cutter 210, further improving the cutting efficiency of the battery cell 20. The fact that the fixed cutter 230 is flush with the bearing plane on the side facing the cutter 210 can be understood as: the fixed cutter 230 facing the cutter 210 can be on the same plane as the bearing plane, or the fixed cutter 230 facing the cutter 210 can be slightly higher or slightly lower than the bearing plane to buffer against industrial manufacturing or installation errors.

[0078] The base 220 also includes a dust collection box 240, housed within a groove 221, for collecting residues generated during the cutting of the battery cell 20. The shape and structure of the dust collection box 240 can be customized according to actual conditions. The dust collection box 240 can be located within the groove 221, with its opening facing the opening of the groove 221. Impurities generated during the cutting process of the battery cell 20 by the blade 210 can spontaneously fall into the dust collection box 240 through the groove 221 under the influence of gravity. This reduces the risk of fire or explosion caused by residues, and also reduces the health impact caused by operators inhaling residues. This improves the safety and reliability of the battery cell cutting equipment 10 during the cutting process of the battery cell 20. In some embodiments, the battery cell cutting equipment 10 can be set to automatically stop after cutting a preset number of battery cells 20, facilitating cleaning operations by the equipment operator. The battery cell cutting equipment 10 can issue prompts to specify the cleaning location and the degree of cleaning, etc.

[0079] Furthermore, the bottom of the groove 221 is wider than the opening. This allows for a larger dust collection box 240, making it easier to collect residues generated during the cutting of the battery cell 20 and to clean these residues. Specifically, the groove 221 may include a clearance groove and a receiving groove. The opening of the clearance groove connects to the bearing plane, and the receiving groove is located on the side of the clearance groove away from the bearing plane. The opening of the receiving groove is wider than the opening of the clearance groove. The receiving groove is connected to the clearance groove, and its specific shape and structure can be set according to actual conditions. The receiving groove may be located on the side of the clearance groove away from the bearing plane in the direction of gravity. The shape and structure of the dust collection box 240 can also be set according to actual conditions. The dust collection box 240 may be located inside the receiving groove, and its opening may face the clearance groove. Impurities generated during the cutting of the battery cell 20 by the tool 210 can spontaneously fall into the dust collection box 240 through the clearance groove under the action of gravity, reducing the risk of excessive impurities affecting subsequent cutting. The receiving slot can penetrate at least one side of the base 220, and the dust collection box 240 can be inserted into or removed from the receiving slot through the penetrating area.

[0080] See Figure 6 , Figure 6 This is a second structural schematic diagram of a cell cutting device according to one or more embodiments of this application.

[0081] The battery cell cutting equipment 10 includes a feeding mechanism 300. In response to a cutting command to obtain a battery cell block 21 with a first width, the feeding mechanism 300 conveys the battery cell 20 a distance of the first width, so that the cutting mechanism 200 cuts the battery cell 20 to obtain a battery cell block 21 with the first width. The cutting command can be issued by the controller of the battery cell cutting equipment 10 and sent to the feeding mechanism 300 and the cutting mechanism 200, so that the cutting mechanism 200 and the feeding mechanism 300 cooperate to cut the battery cell 20 into battery cell blocks 21 with the first width. The first width is a preset width and can be set according to actual conditions. The specific shape and structure of the feeding mechanism 300 can be set according to actual conditions. For example, the feeding mechanism 300 may include a transfer mechanism that can transfer battery cells 20 with expected voltage detection results to the cutting mechanism 200, which then cuts the battery cell 20 into multiple battery cell blocks 21. For example, the transfer mechanism can transfer the battery cell 20 to the cutting mechanism 200 and transport the battery cell 20 a distance of a first width. Then, the cutting mechanism 200 cuts the battery cell 20 once. After the first cut is completed, the transfer mechanism continues to transport the battery cell 20 a distance of a first width and then cuts the battery cell 20 a second time. This action is repeated to cut the battery cell 20 into multiple battery cell blocks 21.

[0082] Furthermore, the battery cell cutting equipment 10 includes a rotating mechanism 400, which is used to adjust the angle of the battery cell block 21 having a first width. The specific shape and structure of the rotating mechanism 400 can be set according to the actual situation. For example, the rotating mechanism 400 may include a base 220 and a rotating table. The base 220 can be fixed on the frame of the battery cell cutting equipment 10. A rotary motor can be provided on the base 220. The rotating table can be located on the upper part of the base 220 and connected to the output end of the rotary motor, so that the rotating table can be driven to rotate by the rotary motor. In one application scenario, after the cutting mechanism 200 cuts the battery cell 20 to form a battery cell block 21 with a first width, the feeding mechanism 300 can push the battery cell block 21 with the first width back to the rotating mechanism 400 so that the rotating mechanism 400 can adjust the battery cell block 21 with the first width. The feeding mechanism 300 then transfers the battery cell block 21 with the first width to the cutting mechanism 200 so that the cutting mechanism 200 can perform a second cutting on the battery cell block 21 with the first width to form multiple battery cell blocks 21 with the second cutting.

[0083] The rotating mechanism 400 can also be used to receive and rotate the battery cell 20. Before the battery cell 20 is cut for the first time, the feeding mechanism 300 can transfer the battery cell 20 to the rotating table. The rotation of the rotating table will drive the battery cell 20 to rotate, thereby adjusting the angle of the battery cell 20. The rotating mechanism 400 can be arranged adjacent to the cutting mechanism 200, and the voltage detection mechanism 100 can also be used to detect the voltage of the battery cell 20 located on the rotating mechanism 400. Figure 6 As shown, the voltage detection mechanism 100 can be at least partially located above the rotating mechanism 400. After the battery cell 20 is transferred to the rotating mechanism 400, the voltage detection mechanism 100 can perform voltage detection on the battery cell 20; or the voltage detection mechanism 100 can cooperate with the rotating mechanism 400 to adjust the state of the battery cell 20, and then perform voltage detection on the battery cell 20 after the state of the battery cell 20 is adjusted; or the voltage detection mechanism 100 can perform voltage detection on the battery cell 20 during the process of the rotating mechanism 400 adjusting the state of the battery cell 20, etc. Therefore, by cooperating with the rotating mechanism 400 to perform voltage detection on the battery cell 20, the efficiency of voltage detection can be improved, thereby improving the overall cutting efficiency.

[0084] Furthermore, in response to a cutting command for obtaining a battery cell block 21 with a first length, the feeding mechanism 300 is also used to convey the battery cell block 21 after angle adjustment a distance of the first length, so that the cutting mechanism 200 cuts the battery cell block 21 after angle adjustment to obtain a battery cell block 21 with a first width and a first length. The battery cell block 21 with the first width can be adjusted to any angle; for example, the angle difference between the battery cell block 21 with the first width and the angle before and after adjustment can be 90°, 60°, 45°, or 30°, etc. The cutting command can be issued by the controller of the battery cell cutting equipment 10 and sent to the feeding mechanism 300 and the cutting mechanism 200, so that the cutting mechanism 200 and the feeding mechanism 300 cooperate to cut the battery cell 20, so that the cutting mechanism 200 cuts the battery cell 20 into battery cell blocks 21 with the first length and the first width. The first length is a preset length and can be set according to actual conditions. After the cutting mechanism 200 cuts the battery cell 20 to form a battery cell block 21 with a first width, the feeding mechanism 300 can push the battery cell block 21 with the first width back to the rotating mechanism 400 to adjust the battery cell block 21 with the first width through the rotating mechanism 400. The feeding mechanism 300 then transfers the battery cell block 21 with the first width to the cutting mechanism 200 and conveys the battery cell block 21 with the first width a distance of a first length. Then, the cutting mechanism 200 cuts the battery cell block 21 with the first width once. After the first cut is completed, the feeding mechanism 300 continues to convey the battery cell block 21 with the first width a distance of a first length to perform a second cut on the battery cell block 21 with the first width. This action is repeated to obtain a battery cell block 21 with the first width and the first length.

[0085] There are multiple battery cell blocks 21 after the angle is adjusted. Specifically, the number of battery cell blocks 21 after the angle is adjusted can be two, three, four, five, or other quantities. Multiple battery cell blocks 21 can be arranged on the rotating mechanism 400. The rotating mechanism 400 can adjust the angle of multiple battery cell blocks 21 at one time by rotating once, so that multiple battery cell blocks 21 can be cut at the same time during the secondary cutting, thereby improving the cutting efficiency of the battery cell 20.

[0086] In some embodiments, the transfer mechanism of the feeding mechanism 300 may include a toggle member and a guide rail. The toggle member is slidably connected to the guide rail and is used to toggle the battery cell 20 to transfer the battery cell 20. The guide rail may include, but is not limited to, a slide rail, and correspondingly, the guide rail may be a strip-shaped guide rail. The shape of the toggle member can be set according to the actual situation. The toggle member can be slidably connected to the guide rail via a slider, and the toggle member can reciprocate on the guide rail.

[0087] See Figure 7 , Figure 7 This is a third structural schematic diagram of a cell cutting device according to one or more embodiments of this application.

[0088] The battery cell cutting equipment 10 includes a transfer mechanism 810 and a loading mechanism 820. The loading mechanism 820 can switch between a first position and a second position different from the first position. The loading mechanism 820 is used to load a packaging bag at the first position, and the transfer mechanism 810 is used to transfer the battery cell block 21 into the packaging bag of the loading mechanism 820 located at the second position. The transfer mechanism 810 can be located on the side of the cutting mechanism 200 opposite to the feeding mechanism 300. The second cutting mechanism 200 can be used to grip the battery cell block 21 and drive the battery cell block 21 to move in three-dimensional space. For example, the transfer mechanism 810 can include a driving part and a gripping part, which are connected. The gripping part can be used to grip the battery cell block 21, and the driving part can be used to drive the gripping part to move in a plane, move up and down, and rotate. In order to facilitate the transfer mechanism 810 to grip the battery cell block 21, a clearance gripping groove can also be provided on the support platform of the cutting mechanism 200 so that the gripping part can extend into the clearance gripping groove to grip the battery cell block 21. The loading mechanism 820 can move between a first position and a second position. When the loading mechanism 820 moves to the first position, the packaging bag can be placed in the loading mechanism 820 manually or by controlling other tooling. Then the loading mechanism 820 moves from the first position to the second position. When the loading mechanism 820 is in the second position, the transfer mechanism 810 can transfer the battery cell 21 into the loading bag of the loading mechanism 820. This enables automated bagging of the battery cell 21, reduces labor costs, and improves the processing efficiency after cutting.

[0089] The battery cell cutting equipment 10 includes a sealing mechanism 830, which is used to seal a packaging bag containing battery cell blocks 21 at a third position, wherein the third position is located between the first and second positions. The sealing mechanism 830 may include, but is not limited to, a heat-sealing sealing mechanism 830. In one application scenario, the sealing mechanism 830 moves to the first position, and the packaging bag is placed in the loading mechanism 820 by manual operation or control of other tooling. Then, the loading mechanism 820 moves from the first position to the second position. When the loading mechanism 820 is in the second position, the transfer mechanism 810 can transfer the battery cell blocks 21 into the loading bag of the loading mechanism 820. Then, the loading mechanism 820 moves from the second position to the third position, and the packaging bag is heat-sealed by the sealing mechanism 830. After the heat-sealing is completed, the loading mechanism 820 moves from the third position back to the first position to facilitate the removal of the sealed packaging bag from the loading mechanism 820, thereby improving the processing efficiency after cutting.

[0090] See Figure 7 and Figure 8 , Figure 8 This is a fourth structural schematic diagram of a cell cutting device according to one or more embodiments of this application.

[0091] The battery cell cutting equipment 10 includes a sealed outer cover 500, which forms a sealed space 510. The voltage detection mechanism 100 and the cutting mechanism 200 are located within the sealed space 510. The sealed outer cover 500 allows the processing of the battery cell 20 to be conducted in a specific cutting environment, reducing the risk of combustion or explosion, and minimizing the impact on subsequent test results of the cut battery cell block 21. The specific shape and structure of the sealed outer cover 500 can be set according to actual conditions. The sealed outer cover 500 can form a sealed space 510, which can be filled with a specific gas to maintain the internal gas pressure. For example, nitrogen or oxygen can be filled into the sealed space 510. In some embodiments, the sealing cover 500 may be provided with a battery cell 20 inlet, which may correspond to the feeding mechanism 300. The feeding mechanism 300 may at least partially exit the sealing space 510 through the battery cell 20 inlet, so as to place the battery cell 20 from the outside of the sealing space 510 to the feeding mechanism 300, and the feeding mechanism 300 may also convey the battery cell 20 into the sealing space 510 through the battery cell 20 inlet. In some embodiments, the transfer mechanism 810, the loading mechanism 820, and the sealing bag mechanism 830 are all located within the sealing space 510. In a first position, the sealing cover 500 may be provided with a sealing bag inlet, which may correspond to the loading mechanism 820. The loading mechanism 820 may at least partially exit the sealing space 510 through the sealing bag inlet, so as to place the packaging bag from the outside of the sealing space 510 to the loading mechanism 820, and the loading mechanism 820 may also convey the packaging bag into the sealing space 510 through the sealing bag inlet.

[0092] See Figure 8 and Figure 9 , Figure 9 This is a schematic diagram of the air outlet of a pneumatic control mechanism according to one or more embodiments of this application.

[0093] The battery cell cutting equipment 10 includes a pneumatic control mechanism 600, which includes an air inlet 610 and an air outlet 620 located within a sealed space 510. An impurity filter 630 is provided at the air outlet 620. The pneumatic control mechanism 600 may also include a control section, which may be at least partially located outside the sealed space 510. The control section may be connected to the air outlet 620 and the air inlet 610. The pneumatic control mechanism 600 outputs gas through the air inlet 610 and absorbs gas through the air outlet 620. In this embodiment, the pneumatic control mechanism 600 can output a specific gas to the sealed space 510 through the air inlet 610 and absorb gas within the sealed space 510 through the air outlet 620, thereby achieving pressure regulation within the sealed space 510 and adjusting the type and content of gases within the sealed space 510, such as adjusting the proportion of nitrogen and oxygen within the sealed space 510. The specific shape and structure of the impurity filter 630 can be set according to actual conditions. The impurity filter 630 can allow gas molecules and liquid molecules to pass through, while blocking the passage of solid molecules. For example, the impurity filter 630 can be, but is not limited to, a filter screen, filter paper, filter cloth, microfiltration membrane, ultrafiltration membrane, reverse osmosis membrane, etc. The impurity filter 630 can cover the entire air outlet 620. In some other embodiments, the impurity filter 630 can also cover the air inlet 610 to reduce the risk of impurities entering the sealed space 510 from the air inlet 610. The air inlet 610 and the air outlet 620 are located within the sealed space 510, which facilitates the alteration of the air pressure and / or characteristic gas content within the sealed space 510. Simultaneously, the air outlet 620 is equipped with an impurity filter 630, which reduces the risk of fire or explosion caused by residues generated during the cutting of the battery cell 20 being sucked out of the sealed space 510 through the air outlet 620. It also reduces the health impact on equipment operators from inhaling residues. This improves the safety and reliability of the battery cell cutting equipment 10 during the cutting process of the battery cell 20.

[0094] In some embodiments, the cell cutting device 10 includes a pressure detection element 710 located within a sealed space 510. The pressure detection element 710 is used to detect the internal pressure of the sealed space 510. The pressure detection element 710 may include, but is not limited to, a positive pressure sensor. The pressure detection element 710 may be located at any position within the sealed space 510, for example, within the sealed space 510 and close to the cutting mechanism 200. The pressure detection element 710 can be used to monitor the internal pressure of the sealed space 510 in real time, so as to adjust the pressure of the sealed space 510 based on the real-time monitored internal pressure. For example, the pressure detection device 710 can monitor the internal pressure of the sealed space 510 in real time and transmit the real-time monitored internal pressure to the controller of the cell cutting equipment 10. The controller compares the real-time monitored internal pressure with a preset pressure threshold range. If the real-time monitored internal pressure is not within the preset pressure threshold range, the internal pressure of the sealed space 510 can be adjusted by adjusting the pressure relief valve and / or proportional valve of the sealed space 510, or the internal pressure of the sealed space 510 can be adjusted by inputting or outputting gas into the sealed space 510 through the pressure control mechanism 600. The preset pressure threshold range may include, but is not limited to, 0 to 10 kPa, 1 kPa to 10 kPa, 2 kPa to 10 kPa, 5 kPa to 10 kPa, 5 kPa to 8 kPa, 5 kPa to 7 kPa, etc. If the internal air pressure is abnormal under real-time monitoring, the cell cutting device 10 can stop the cutting operation of the cell 20. When the internal air pressure of the sealed space 510 is under normal conditions, the cell cutting device 10 can then perform the cutting operation of the cell 20.

[0095] In some embodiments, the cell cutting device 10 includes an oxygen detection element 720 located within a sealed space 510. The oxygen detection element 720 is used to detect the oxygen content of the sealed space 510. The oxygen detection element 720 may include, but is not limited to, an oxygen content sensor, and may be located at any position within the sealed space 510, for example, within the sealed space 510 and close to the cutting mechanism 200. The oxygen detection element 720 can be used to monitor the oxygen content of the sealed space 510 in real time, so as to adjust the oxygen content of the sealed space 510 based on the real-time monitored oxygen content. For example, the oxygen detection element 720 can monitor the oxygen content inside the sealed space 510 in real time and transmit the real-time monitored internal oxygen content to the controller of the cell cutting equipment 10. The controller compares the real-time monitored internal oxygen content with a preset oxygen content threshold. If the real-time monitored oxygen content is different from the preset oxygen content threshold, oxygen or nitrogen can be introduced into the sealed space 510 to adjust the internal oxygen content. During the process of introducing oxygen or nitrogen into the sealed space 510, the sealed space 510 can also be vented to simultaneously adjust the internal air pressure. The preset oxygen content threshold may include, but is not limited to, 3%, 4%, 5%, 6%, 7%, etc. If the real-time monitored internal oxygen content is less than the preset oxygen content threshold, oxygen can be continuously introduced into the sealed space 510 for a predetermined time. If the real-time monitored internal oxygen content is greater than the preset oxygen content threshold, nitrogen can be continuously introduced into the sealed space 510 for a predetermined time. If the internal oxygen content is abnormal under real-time monitoring, the cell cutting device 10 can stop the cutting operation of the cell 20. Once the oxygen content inside the sealed space 510 is normal, the cell cutting device 10 will resume the cutting operation of the cell 20. This is because the cell 20 may heat up during the cutting process; if the oxygen content increases, the cell 20 may burn. Detecting and controlling the oxygen content during the cutting process not only reduces the probability of the cell 20 burning upon contact with oxygen but also reduces the probability of the electrolyte gas burning upon contact with oxygen, further improving the safety and reliability of the cell cutting device 10 during the cutting process of the cell 20.

[0096] In some embodiments, the battery cell cutting device 10 includes a temperature detection element 730 located within a sealed space 510. The temperature detection element 730 is used to detect the temperature of the sealed space 510. The temperature detection element 730 may include, but is not limited to, a temperature probe sensor. The temperature detection element 730 can be located at any position within the sealed space 510, for example, within the sealed space 510 and close to the cutting mechanism 200, specifically closer to the cutting tool 210 cutting the battery cell 20. The temperature detection element 730 can be used to monitor the temperature changes of the sealed space 510 in real time, so as to control the temperature of the sealed space 510 in real time, adjust and maintain the standard temperature conditions for voltage cutting, and by detecting the temperature of the sealed space 510, control the ambient temperature during the cutting process of the battery cell 20, and control the heating rate of the battery cell 20 during the cutting process, reducing the risk of combustion caused by the heating of the battery cell 20, and further improving the safety and reliability of the battery cell cutting device 10 during the cutting process of the battery cell 20. For example, the temperature detection element 730 can monitor the temperature change of the sealed space 510 in real time and transmit the real-time monitored temperature change to the controller of the cell cutting equipment 10. The controller compares the real-time monitored temperature change with a preset temperature threshold range. If the real-time monitored temperature change is different from the preset temperature threshold range, emergency ventilation and audible and visual alarms can be used. The preset temperature threshold range may include, but is not limited to, 40°C to 50°C, 35°C to 50°C, 40°C to 45°C, 45°C to 50°C, etc. In the event of an abnormal real-time monitored temperature change, the cell cutting equipment 10 can stop the cutting operation of the cell 20. Once the internal air pressure of the sealed space 510 is under normal conditions, the cell cutting equipment 10 can then resume the cutting operation of the cell 20.

[0097] In some embodiments, the cell cutting device 10 includes an electrolyte gas detection element 740 located within a sealed space 510. The electrolyte gas detection element 740 is used to detect the electrolyte gas content in the sealed space 510. The electrolyte gas detection element 740 may include, but is not limited to, an electrolyte gas sensor. The electrolyte gas detection element 740 can be located at any position within the sealed space 510, for example, within the sealed space 510 and near the bottom of the cutting mechanism 200. The electrolyte gas detection element 740 can be used to monitor the electrolyte gas content in the sealed space 510 in real time, so as to facilitate timely processing of the sealed space 510 based on the real-time monitored electrolyte gas content. For example, the electrolyte gas detection device 740 can monitor the electrolyte gas content in the sealed space 510 in real time and transmit the real-time monitored electrolyte gas content to the controller of the cell cutting equipment 10. The controller compares the real-time monitored electrolyte gas content with a preset electrolyte gas threshold. If the real-time monitored oxygen content is greater than the preset electrolyte gas content threshold, the sealed space 510 is vented. In the event of an abnormality in the internal electrolyte gas content monitored in real time, the cell cutting equipment 10 can stop the cutting operation of the cell 20. When the electrolyte gas content in the sealed space 510 is under normal conditions, the cell cutting equipment 10 will then perform the cutting operation of the cell 20. This facilitates timely handling when the electrolyte gas content exceeds the threshold. For example, the cell cutting equipment 10 can issue a safety alarm, or the cell cutting equipment 10 can fill the sealed space 510 with an inert gas such as nitrogen to reduce the oxygen content. This reduces the probability of the electrolyte gas igniting upon contact with oxygen, further improving the safety and reliability of the cell cutting equipment 10 during the cutting process of the cell 20.

[0098] In some embodiments, the sealing cover 500 includes at least one observation window 520 for observing the interior of the sealed space 510. The observation window 520 is configured to be openable or closable. The number of observation windows 520 can be set according to actual conditions; for example, there can be one, two, three, or other numbers of observation windows 520. The sealing cover 500 can be made of fire-resistant stainless steel, and the observation window 520 can be made of explosion-proof glass. The observation window 520 is at least partially transparent so that the user can view the interior of the sealed space 510 from the outside of the sealing cover 500. The fact that the observation window 520 is configured to be openable or closable facilitates the operator's observation of the progress of the battery cell 20 cutting and the inspection and maintenance of the internal mechanisms of the battery cell cutting equipment 10 through the observation window 520.

[0099] In summary, the voltage detection mechanism 100 is used to detect the voltage of the battery cell 20, and the cutting mechanism 200 cuts the battery cell 20 into multiple battery cell blocks 21 when the voltage is lower than the threshold. This reduces the risk of fire and combustion of the battery cell 20 caused by the cutting mechanism 200 cutting the battery cell 20 whose discharge does not meet expectations, thereby improving the safety and reliability of the battery cell cutting equipment 10 in the process of cutting the battery cell 20.

[0100] To address the technical problems existing in the related technologies, this application also provides a testing system, which includes a testing device and a cell cutting device 10 as described in any of the above embodiments. The testing device is used to perform electrolyte testing on one or more cell blocks obtained by cutting by the cell cutting device 10.

[0101] The testing equipment can be of any shape and structure. After the battery cell cutting equipment 10 cuts and forms multiple battery cell blocks, these blocks can be transported to the testing equipment for electrolyte testing. For example, multiple battery cell blocks can be transferred to the testing equipment using tooling, or one or more battery cell blocks can be manually placed onto the testing equipment. The testing equipment can centrifuge the battery cell blocks to extract the electrolyte and determine its content. By measuring the electrolyte content of multiple battery cell blocks separately, the electrolyte distribution at different locations within the battery cell can be obtained.

[0102] 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 battery cell cutting device, characterized in that, The battery cell cutting equipment includes: A voltage detection mechanism for detecting the voltage of a battery cell includes: multiple pairs of conductive portions arranged along a first direction, two conductive portions of the same pair of conductive portions arranged along a second direction, wherein the first direction and the second direction intersect. Any two of the multiple pairs of conductive parts are used to contact the positive and negative electrode tabs of the battery cell, respectively; A cutting mechanism is used to cut the battery cell into multiple battery cell blocks when the voltage is below a threshold.

2. The battery cell cutting equipment according to claim 1, characterized in that, The voltage detection mechanism includes two pairs of conductive parts, one conductive part in one pair of conductive parts and one conductive part in the other pair of conductive parts are respectively used to contact the positive electrode tab and the negative electrode tab of the battery cell.

3. The cell cutting equipment according to claim 1, characterized in that, The voltage detection mechanism further includes a driving component, the driving component being used for: Drive at least one of the same pair of conductive parts to move relative to the other to adjust the distance between the two conductive parts; and / or Drive one pair of conductive parts to move relative to another pair of conductive parts to adjust the distance between the two pairs of conductive parts; and / or Multiple pairs of conductive parts are driven to move relative to the battery cell to adjust their distance from the positive electrode tab and the negative electrode tab.

4. The cell cutting equipment according to claim 3, characterized in that, The voltage detection mechanism further includes a connecting part for connecting the driving component and each pair of conductive parts.

5. The battery cell cutting equipment according to claim 1, characterized in that, The cutting mechanism includes a cutting tool and a base. The base is used to support the battery cell. The cutting tool and the base are arranged opposite to each other. The cutting tool is used to cut the battery cell supported on the base.

6. The cell cutting equipment according to claim 5, characterized in that, At least a portion of the outer surface of the cutting tool is insulated.

7. The cell cutting equipment according to claim 5, characterized in that, The cutting tool includes a blade, and the distance between the blade and the base decreases from large to small in the direction in which the blade extends.

8. The cell cutting equipment according to claim 5, characterized in that, The base includes a groove or recessable portion for accommodating at least a portion of the tool.

9. The cell cutting equipment according to claim 5, characterized in that, The base includes a fixed cutter, which corresponds to the cutting tool.

10. The cell cutting equipment according to claim 8, characterized in that, The base also includes a dust collection box, which is housed in the groove to collect residues generated during the cutting of the battery cell.

11. The cell cutting equipment according to claim 10, characterized in that, The bottom of the groove is wider than the opening.

12. The cell cutting equipment according to claim 1, characterized in that, The battery cell cutting equipment includes a feeding mechanism; The feeding mechanism is used to convey the battery cell a distance of a first width, where the first width is a preset width, so that the cutting mechanism can cut the battery cell to obtain a battery cell block with the first width.

13. The cell cutting equipment according to claim 12, characterized in that, The battery cell cutting equipment includes a rotating mechanism for adjusting the angle of the battery cell block having the first width.

14. The cell cutting equipment according to claim 13, characterized in that, The feeding mechanism is also used to convey the adjusted battery cell block a distance of a first length, where the first length is a preset length, so that the cutting mechanism can cut the adjusted battery cell block to obtain a battery cell block with the first width and the first length.

15. The cell cutting equipment according to claim 14, characterized in that, The adjusted battery cell blocks consist of multiple units.

16. The battery cell cutting equipment according to any one of claims 1 to 15, characterized in that, The battery cell cutting equipment includes a sealed outer cover, which forms a sealed space, and the voltage detection mechanism and the cutting mechanism are located within the sealed space.

17. The cell cutting equipment according to claim 16, characterized in that, The battery cell cutting equipment includes a pneumatic control mechanism, which includes an air inlet and an air outlet, both located within the sealed space.

18. The cell cutting equipment according to claim 17, characterized in that, At least one of the air inlet and the air outlet is provided with an impurity filter.

19. The cell cutting equipment according to claim 16, characterized in that, The battery cell cutting equipment includes a pressure detection device located within the sealed space, which is used to detect the internal pressure of the sealed space.

20. The cell cutting equipment according to claim 19, characterized in that, The battery cell cutting equipment includes an oxygen detection device located within the sealed space, which is used to detect the oxygen content of the sealed space.

21. The cell cutting equipment according to claim 19, characterized in that, The battery cell cutting equipment includes a temperature detection element located within the sealed space, which is used to detect the temperature of the sealed space.

22. The cell cutting equipment according to claim 19, characterized in that, The battery cell cutting equipment includes an electrolyte gas detection device located within the sealed space, which is used to detect the electrolyte gas content in the sealed space.

23. The cell cutting equipment according to claim 16, characterized in that, The sealed outer cover includes at least one observation window for observing the interior of the sealed space, and the observation window is configured to allow opening or closing.

24. A detection system, characterized in that, The detection system includes a detection device and a cell cutting device as described in any one of claims 1 to 23, wherein the detection device is used to perform electrolyte testing on one or more cell blocks obtained by the cell cutting device.

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