Pole piece resistance measuring device, pole piece rolling equipment and battery production system

Abstract

The embodiment of the utility model provides a pole piece resistance measuring device, pole piece rolling equipment and a battery production system. The pole piece resistance measuring device comprises an installation assembly and a resistance measuring assembly, the installation assembly comprises a first installation piece, a connecting piece and a second installation piece which are connected in sequence, the resistance measuring assembly comprises a first probe and a second probe, the first probe is connected to the first installation piece, and the second probe is connected to the second installation piece. The pole piece conveying device can be installed on the rolling equipment and serves as a part of the rolling equipment, when the resistance of the pole piece is measured, the pole piece conveying device of the rolling equipment is shut down, the interval between the first installation part and the second installation part is used for bearing the pole piece conveyed by the pole piece conveying device, and the resistance of the pole piece is measured. The resistance measurement assembly is used for measuring the resistance of the pole piece, the pole piece does not need to be torn or transferred during measurement, manpower is liberated, the measurement efficiency of the resistance of the pole piece is improved, and the loss of the pole piece in the resistance measurement process is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an electrode resistance measuring device, an electrode rolling equipment, and a battery production system. Background Technology

[0002] In the production process of battery electrode sheets, the electrode sheets need to be rolled using rolling equipment, and the electrode sheet resistance is tested after rolling.

[0003] The current technology requires the rolling equipment to be stopped during testing, and then a portion of the electrode sheet needs to be manually removed and transferred to the resistance testing equipment for testing. This process is inefficient and results in electrode loss. Therefore, improving the measurement efficiency of electrode resistance and reducing electrode loss is a research direction in battery technology. Utility Model Content

[0004] This application provides an electrode resistance measuring device, an electrode rolling equipment, and a battery production system, which can improve the measurement efficiency of electrode resistance and reduce electrode loss.

[0005] In a first aspect, embodiments of this application provide an electrode resistance measuring device, including a mounting assembly and a resistance measuring assembly. The mounting assembly includes a first mounting member, a connector, and a second mounting member connected in sequence. The first mounting member and the second mounting member are arranged parallel to each other and spaced apart. The first mounting member is configured to move along a first direction on the connector to approach or move away from the second mounting member. The second mounting member and / or the connector are used to connect to an electrode conveying device of a rolling mill. The first direction is the arrangement direction from the first mounting member to the connector. The resistance measuring assembly includes a first probe and a second probe. The first probe is connected to the first mounting member, and the second probe is connected to the second mounting member.

[0006] By adopting the above technical solution, the second mounting component and / or the connecting component are connected to the electrode conveying device of the rolling mill, so that the electrode resistance measuring device is part of the rolling mill. When measuring the electrode resistance, the electrode conveying device stops, and the gap between the first mounting component and the second mounting component forms a receiving point for the electrode conveyed by the electrode conveying device. The first probe and the second probe of the resistance measuring component are used to clamp the electrode for measuring the electrode resistance. During the measurement, there is no need to tear off or transfer the electrode; the electrode in the rolling mill is measured directly. This not only frees up manpower and improves the efficiency of electrode resistance measurement, but also reduces or even avoids the loss of the electrode during the resistance measurement process.

[0007] In some embodiments of this application, the first mounting member is provided with a socket, the connector is inserted into the socket, and the wall of the socket is tumbledly connected to the connector.

[0008] By adopting the above technical solution, a socket is provided on the first mounting component, and the connector is inserted into the socket. The first mounting component moves relative to the connector along the first direction through the socket. This can improve the stability of the first mounting component when it is installed on the connector and the stability of the first mounting component during movement. Moreover, the hole wall of the socket is designed to be in rolling connection with the connector, which reduces the friction between the two when the first mounting component moves on the connector and reduces the wear of the component.

[0009] In some embodiments of this application, the connector is provided with a first track groove facing the wall of the insertion hole. The length direction of the first track groove extends along the first direction. A plurality of first rollers are installed in the first track groove and are spaced apart along the first direction. The wall of the insertion hole abuts against at least one of the first rollers.

[0010] By adopting the above technical solution, a first track groove is opened on the connector, and a first roller is provided in the first track groove. The first roller is used to roll and connect with the first mounting part. The structure is simple, and the first roller guides the connector to facilitate the docking of the connector and the first mounting part.

[0011] In some embodiments of this application, the electrode resistance measuring device further includes a first driving component, which is connected to the first mounting member and is used to drive the first mounting member to move along the first direction.

[0012] The above technical solution includes a first drive component, which drives the first mounting component to move on the connector, thereby automating the movement of the first mounting component.

[0013] In some embodiments of this application, the first driving component includes a first cylinder and an intake pipe, the intake pipe being used to supply air to the first cylinder. The electrode resistance measuring device further includes a first pressure detection element, a second pressure detection element, a gas flow detection element, a control component, and a warning component. The first pressure detection element is used to detect a first pressure on the first probe, the second pressure detection element is used to detect a second pressure on the second probe, the gas flow detection element is used to detect the gas flow rate of the intake pipe, and the control component is communicatively connected to the first pressure detection element, the second pressure detection element, the gas flow detection element, and the warning component. The control component is configured to obtain the total contact area between the first probe and the second probe and the electrode based on the first pressure, the second pressure, and the gas flow rate, and to control the warning component to issue a warning when the total contact area is less than a preset value.

[0014] By adopting the above technical solution, when the control component determines that the actual contact area is less than the preset value, the warning component will issue a warning to remind the staff to clean the first and second probes. This reduces the possibility that resistance detection will still be performed when the contact area between the first and second probes and the electrode is reduced after contact with dust or other impurities, and improves the accuracy of resistance detection.

[0015] In some embodiments of this application, the electrode resistance measuring device further includes a first bracket, the first driving component is mounted on the first bracket, and the first mounting member is slidably connected to the first bracket along the first direction.

[0016] The above technical solution includes a first bracket that provides support for the first mounting component and the first drive assembly, thereby improving the stability of both during installation and operation.

[0017] In some embodiments of this application, the first probe is configured to move on the first mounting member along a second direction, the second direction intersecting the first direction.

[0018] By adopting the above technical solution, the first probe is designed to be movable along the second direction, which facilitates the adjustment of the position of the first probe and enables the first probe and the second probe to better cooperate in the measurement of electrode resistance.

[0019] In some embodiments of this application, the electrode resistance measuring device further includes a first moving member and a second driving component. The second driving component is connected to the first moving member and is used to drive the first moving member to move along the second direction. The first probe is mounted on the first moving member.

[0020] By adopting the above technical solution, the first probe and the first mounting component are installed by the first moving component. The first moving component and the first probe can move synchronously along the second direction, which facilitates the installation of the probe and its movement along the second direction. Furthermore, the first moving component and the first probe are driven to move along the second direction by the second driving component, thereby automating the movement of the first moving component and the first probe.

[0021] In some embodiments of this application, the second probe is configured to move along a second direction on the second mounting member, the second direction intersecting the first direction.

[0022] By adopting the above technical solution, the second probe is designed to be movable along the second direction, which facilitates the adjustment of the position of the second probe and enables the second probe and the first probe to better cooperate in the measurement of electrode resistance.

[0023] In some embodiments of this application, the electrode resistance measuring device further includes a first auxiliary conveyor assembly for receiving the electrode located between the first mounting member and the second mounting member.

[0024] By adopting the above technical solution, the first auxiliary conveyor assembly can support the electrode passing between the first mounting component and the second mounting component, so that the electrode is in a more suitable position, which facilitates subsequent resistance measurement.

[0025] Secondly, embodiments of this application provide an electrode rolling device, including a rolling device, an electrode conveying device, and an electrode resistance measuring device as described in any of the above technical solutions. The rolling device is used to roll the electrode; the electrode conveying device is used to convey the electrode; and the electrode resistance measuring device is used to receive the electrode conveyed by the electrode conveying device and to measure the resistance of the electrode.

[0026] By adopting the above technical solution, an electrode resistance measuring device is configured in the electrode rolling equipment. The electrode resistance measuring device receives the electrode conveyed by the conveying device and measures the resistance of the electrode. During the measurement, there is no need to tear off or transfer the electrode. The electrode in the rolling equipment is measured directly. This not only frees up manpower and improves the measurement efficiency of electrode resistance, but also reduces or even avoids the loss of electrode during the resistance measurement process.

[0027] In some embodiments of this application, the electrode conveying device includes a first roller frame and a first electrode conveying roller mounted on the first roller frame, wherein the second mounting member and / or the connecting member are detachably connected to the first roller frame.

[0028] By adopting the above technical solution, the first roller frame is used as the installation foundation of the electrode conveying device, and there is no need to configure too many supporting and fixing structures for the electrode conveying device, which simplifies the equipment structure, reduces production costs, and the second mounting part and / or connecting part is designed to be detachably connected to the first roller frame, which facilitates the installation and removal of the electrode resistance measuring device and the electrode conveying device.

[0029] Thirdly, embodiments of this application provide a battery production system, including the electrode rolling equipment described in the above technical solutions. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application 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 the drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an electrode resistance measuring device provided in some embodiments of this application;

[0032] Figure 2 A schematic diagram of the electrode resistance measuring device provided in some embodiments of this application in the state of performing resistance measurement;

[0033] Figure 3 Top view of an electrode resistance measuring device provided in some embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the resistance measurement component of the electrode resistance measurement device provided in some embodiments of this application;

[0035] Figure 5 A partial structural diagram illustrating the connection between the electrode resistance measuring device and the electrode conveying device provided in some embodiments of this application;

[0036] Figure 6 This is a schematic diagram of the electrical connections of the electrode resistance measuring device provided in some embodiments of this application;

[0037] Figure 7 This is a schematic diagram of the structure of an electrode rolling device provided in some embodiments of this application.

[0038] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0039] 1000. Electrode rolling equipment;

[0040] 100. Electrode resistance measuring device;

[0041] 10. Mounting component; 11. First mounting component; 111. Socket; 12. Connector; 121. First track groove; 122. First roller; 13. Second mounting component; 14. First moving component; 15. Second moving component;

[0042] 20. Resistance measurement assembly; 21. First probe; 22. Second probe; 23. Constant current source; 24. Voltage detection element; 25. First pressure detection element; 26. Second pressure detection element;

[0043] 30. First drive assembly; 31. First linear reciprocating motion component; 311. First cylinder; 312. Intake pipe; 32. Gas flow detection component;

[0044] 40. Control component; 50. Warning component; 60. First support; 70. First auxiliary conveyor assembly; 71. Second roller frame; 72. Second electrode conveyor roller;

[0045] 200, Electrode conveying device; 210, First roller frame; 220, First electrode conveying roller;

[0046] 300. Roller pressing device; 400. Unwinding device; 500. First receiving platform; 600. Second receiving platform; 700. Electrode slitting device; 800. Rewinding device;

[0047] X, the first direction; Y, the second direction. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "including," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] In this application, "multiple" means two or more (including two).

[0055] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. A battery generally includes a battery housing for encapsulating one or more battery cells. The battery housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0056] The battery cells mentioned in the embodiments of this application can be lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application are not limited in this regard. The battery cells can be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited in this regard either.

[0057] The battery cell mentioned in the embodiments of this application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The positive electrode includes a positive current collector and a positive active material layer, with the positive active material layer coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area. The positive electrode coating area is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0058] The battery cells described in this application are applicable to batteries and electrical devices that use batteries. Electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0059] The embodiments of this application will now be described in detail.

[0060] Currently, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0061] In the battery manufacturing process, after the electrode sheets undergo the rolling process, their resistance needs to be measured. Currently, the production line must stop after each roll of material is completed. Workers then manually measure the resistance of the electrode sheets by tearing off irregular lengths and placing them in a fixed position using an offline resistance meter. This entire process takes approximately 15 minutes, primarily due to the inefficiency of manual sampling and repeated sample delivery. Furthermore, the length and location of manual sampling are uncontrollable, leading to significant electrode loss and poor data comparability.

[0062] Therefore, improving the detection efficiency of electrode resistance and reducing electrode loss is an important issue in battery manufacturing.

[0063] In view of this, this application provides a technical solution that designs an electrode resistance measuring device that can be applied to rolling equipment, which can realize online detection of the electrode. The electrode resistance measuring device only needs to stop for a moment during the detection to complete the electrode resistance measurement, without the need for manual sampling and back-and-forth sample delivery, thereby solving the above-mentioned technical problems.

[0064] The following is in conjunction with the appendix Figure 1-6 The structure of the electrode resistance measuring device provided in the embodiments of this application will be described.

[0065] Combined with appendix Figure 1-4 As shown, this application embodiment provides an electrode resistance measuring device 100, including a mounting assembly 10 and a resistance measuring assembly 20. The mounting assembly 10 includes a first mounting member 11, a connector 12, and a second mounting member 13 connected in sequence. The first mounting member 11 and the second mounting member 13 are arranged in parallel and spaced apart. The first mounting member 11 is configured to move along a first direction X on the connector 12 to approach or move away from the second mounting member 13. The second mounting member 13 and / or the connector 12 are used to connect to the electrode conveying device 200 of the rolling mill. The first direction X is the arrangement direction of the first mounting member 11 to the connector 12. The resistance measuring assembly 20 includes a first probe 21 and a second probe 22. The first probe 21 is connected to the first mounting member 11, and the second probe 22 is connected to the second mounting member 13.

[0066] The electrode resistance measuring device 100 can be used for resistance measurement of cathode and / or anode electrodes. In the electrode resistance measuring device 100, the mounting component 10 is mainly used to mount the resistance measuring component 20 of this embodiment. The first mounting component 11, the second mounting component 13 and the connecting component 12 can all be plate-shaped or block-shaped components, and their materials can be metal or plastic with a certain structural strength. This embodiment will not list them one by one.

[0067] In some embodiments, the first mounting member 11, the second mounting member 13, and the connector 12 of this embodiment can be arranged horizontally, with the first mounting member 11 and the second mounting member 13 parallel and forming a detection space for the electrode to enter.

[0068] The connector 12 is connected at an angle to the first mounting member 11 and the second mounting member 13 respectively. For example, the length direction of the connector 12 can be perpendicular to the first mounting member 11 and the second mounting member 13 respectively. In this case, the length direction of the connector 12 is set along the first direction X, which is also the arrangement direction of the first mounting member 11 to the second mounting member 13.

[0069] The connector 12 can be connected to the first mounting member 11 by means of sliding connection, rolling connection or other movable connection, so that the first mounting member 11 can move along the first direction X.

[0070] The other end of the connector 12 can be fixedly connected to or detachably connected to the second mounting member 13, and the connector 12 and the second mounting member 13 can remain in relative motion.

[0071] The number of connectors 12 can be one or more, such as the two in the figure. The two connectors 12 are located on both sides of the length direction of the first mounting member 11, and the opposite ends of each mounting member are connected to the first mounting member 11 and the second mounting member 13 respectively, forming a more stable rectangular frame structure.

[0072] The resistance measuring device in this embodiment can be a dual-probe structure, such as... Figure 4 As shown, in addition to the first probe 21 and the second probe 22, in some embodiments, the resistance measuring device also includes a constant current source 23 and a voltage detection element 24. The first probe 21 and the second probe 22 are connected by a line, and the constant current source 23 and the voltage detection element 24 are connected in series on the line.

[0073] When the first probe 21 and the second probe 22 are performing detection, the constant current source 23, the voltage detection element 24, the first probe 21, the electrode, and the second probe 22 form a detection circuit. The constant current source 23 provides a stable current to the circuit, and the voltage detection element 24 is used to detect the voltage of the circuit. Since the current of the constant current source 23 is constant, the resistance can be determined using Ohm's law after the voltage is detected.

[0074] In some embodiments, the voltage detection element 24 can be connected to the control component 40 described below. The control component 40 receives the detected voltage signal, calculates the resistance of the electrode through internal calculations, and the control component 40 can also be connected to a display component (not shown in the figure) to display the detected electrode resistance.

[0075] In this embodiment, the second mounting member 13 and / or the connecting member 12 are connected to the electrode conveying device 200 of the roller pressing equipment, including three implementation methods. One method is that the second mounting member 13 is connected to the electrode conveying device 200, while the connecting member 12 is not connected to the electrode conveying device 200. Another method is that the second mounting member 13 is not connected to the electrode conveying device 200, while the connecting member 12 is connected to the electrode conveying device 200. A third method is that the second mounting member 13 and the connecting member 12 are respectively connected to the electrode conveying device 200.

[0076] The entire electrode resistance measuring device 100 can be installed on the rolling mill using the second mounting component 13 and / or the connector 12. When measuring the electrode resistance, the electrode conveying device 200 stops. The gap between the first mounting component 11 and the second mounting component 13 forms a receiving point for the electrode conveyed by the electrode conveying device 200. The first probe 21 and the second probe 22 of the resistance measuring component 20 are used to clamp the electrode for measuring the electrode resistance. During measurement, there is no need to tear off or transfer the electrode; the electrode in the rolling mill is measured directly. This not only frees up manpower and improves the efficiency of electrode resistance measurement, but also reduces or even avoids the loss of the electrode during the resistance measurement process.

[0077] Combined with appendix Figure 5 As shown, in some examples, optionally, the first mounting member 11 is provided with a socket 111, the connector 12 is inserted into the socket 111, and the wall of the socket 111 is in rolling connection with the connector 12.

[0078] The opening size of the socket 111 can be greater than or equal to the size of the connector 12, so that the end of the connector 12 facing away from the second mounting member 13 can be directly inserted into the socket 111, thereby realizing the connection and assembly of the first mounting member 11 and the connector 12.

[0079] After the first mounting component 11 is inserted into the connector 12, and after the second mounting component 13 is connected to the connector 12, the mounting assembly 10 of this embodiment forms a whole.

[0080] When the first mounting component 11 moves, the insertion hole 111 moves relative to one end of the connector 12, thereby enabling the first mounting component 11 to move along the first direction X on the connector 12. The insertion can improve the stability of the first mounting component 11 installed on the connector 12 and the stability of the first mounting component 11 during movement.

[0081] Rolling connection, also known as rolling contact, refers to the fact that at least one of the hole wall of the socket 111 and the connector 12 is provided with a rolling element (such as a ball, roller, wheel, etc.), thereby improving the sliding friction between the two into rolling friction.

[0082] The wall of the socket 111 is designed to be rolled to connect with the connector 12, thereby reducing the friction between the first mounting part 11 and the connector 12 when they move on the connector 12, thus reducing the wear and tear of both and increasing their service life.

[0083] In some examples, the connector 12 is optionally provided with a first track groove 121 facing the wall of the socket 111. The length direction of the first track groove 121 extends along a first direction X. A plurality of first rollers 122 are installed in the first track groove 121 at intervals along the first direction X. The wall of the socket 111 abuts against at least one first roller 122.

[0084] The first track groove 121 can be a groove structure. The length direction of the first track groove 121 extends along the first direction X. The number of first track grooves 121 can be one or multiple along the vertical direction in the figure. The first track groove 121 can be provided on one or more surfaces of the connector 12 facing the wall of the insertion hole 111.

[0085] The first roller 122 is rotatably mounted in the first track groove 121, and the plurality of first rollers 122 are evenly spaced along the first direction X.

[0086] Since a portion of the first roller 122 needs to protrude from the first track groove 121 and simultaneously protrude from the connector 12, the size of at least one side of the socket 111 should be larger than the size of the connector 12 so that the first roller 122 on the connector 12 machine can be inserted into the socket 111.

[0087] When the first mounting member 11 moves along the first direction X, the friction between the first mounting member 11 and the connecting member 12 is reduced by the first roller 122 rolling connection with the first mounting member 11. The structure is simple, and the connection between the connecting member 12 and the first mounting member 11 is convenient under the guidance of the first roller 122.

[0088] Of course, the connection method between the first mounting member 11 and the connecting member 12 in this embodiment is not limited to this. For example, the first mounting member 11 and the connecting member 12 can also be slidably connected by a structure such as a slide rail, or the first mounting member 11 can be rolled to achieve the rolling connection between the first mounting member 11 and the connecting member 12 by having rollers on the first mounting member 11.

[0089] In some examples, the electrode resistance measuring device 100 may optionally include a first drive assembly 30, which is connected to the first mounting member 11 and is used to drive the first mounting member 11 to move along a first direction X.

[0090] The first drive component 30 can be a structure such as a robotic arm, electric wheel, or electric slider that can drive the first mounting component 11 to move along the first direction X.

[0091] The first drive assembly 30 can be installed on the other components of the electrode resistance measuring device 100, excluding the first mounting component 11.

[0092] By configuring the first drive component 30, the first mounting component 11 is moved on the connector 12, thereby automating the movement of the first mounting component 11.

[0093] Combined with appendix Figure 6 As shown, in some examples, optionally, the first drive assembly 30 includes a first cylinder 311 and an air intake pipe 312, the air intake pipe 312 being used to supply air to the first cylinder 311. The electrode resistance measuring device 100 also includes a first pressure detection element 25, a second pressure detection element 26, a gas flow detection element 32, a control assembly 40, and an alarm assembly 50. The first pressure detection element 25 is used to detect the first pressure on the first probe 21, the second pressure detection element 26 is used to detect the second pressure on the second probe 22, the gas flow detection element 32 is used to detect the gas flow in the air intake pipe 312, the control assembly 40 is communicatively connected to the first pressure detection element 25, the second pressure detection element 26, the gas flow detection element 32, and the alarm assembly 50, respectively. The control assembly 40 is configured to obtain the total contact area between the first probe 21 and the second probe 22 and the electrode based on the first pressure, the second pressure, and the gas flow, and to control the alarm assembly 50 to issue an alarm when the contact area is less than a preset value.

[0094] The first drive assembly 30 includes a first linear reciprocating motion component 31, which includes the aforementioned first cylinder 311. The first linear reciprocating motion component 31 refers to a structure that can drive the first mounting component 11 to reciprocate linearly along the first direction X. It can be a motor driving a ball screw or a gear rack, or it can be a cylinder, a hydraulic cylinder, or an electric cylinder, etc.

[0095] Both the first pressure detection element 25 and the second pressure detection element 26 can be pressure sensors. The first pressure detection element 25 can be installed between the first probe 21 and the first moving part 14, and the second pressure detection element 26 can be installed between the second probe 22 and the second moving part 15. The gas flow detection element 32 can be a gas flow sensor installed in the air intake pipe 312.

[0096] The control component 40 can be part of the original control system of the electrode rolling equipment 1000, or it can be an independent control structure. The control component 40 can include a PLC, an MCU control circuit, or a processor. The control component 40 can also be communicatively connected with the aforementioned first drive component 30 and second drive component, thereby controlling the stroke of the first drive component 30 and the second drive component.

[0097] The warning component 50 can be a display screen or an audible and visual alarm, etc. When the display screen is used as the warning component 50, and when the control component 40 determines that the actual total contact area is less than a preset value, the display screen will display an abnormality.

[0098] In this embodiment, when the control component 40 determines that the actual total contact area is less than a preset value, the warning component 50 issues a warning, reminding the staff to clean the first probe 21 and the second probe 22. This reduces the possibility that resistance detection will still be performed when the contact area between the first probe 21 and the second probe 22 and the electrode is reduced after contact with dust or other impurities, thus improving the accuracy of resistance detection.

[0099] The preset value can be the total area of ​​the two first probes 21 and the second probe 22 in contact with the electrode under ideal conditions.

[0100] In addition, determining that the actual total contact area is less than a preset value can be achieved in some embodiments by determining that the difference between the actual total contact area and the preset value is greater than or equal to a preset value of one percent to five percent. For example, the warning component will issue a warning only when the difference between the actual total contact area and the preset value is greater than one percent, two percent, three percent, four percent, or five percent of the preset value.

[0101] The above judgment process is as follows: The pressures of the first probe 21 and the second probe 22 are measured by the first pressure detection element 25 and the second pressure detection element 26 respectively. Then, the total pressure F of the first pressure detection element 25 and the second pressure detection element 26 is obtained. Using S = F / P, the total contact area between the first probe 21 and the second probe 22 and the electrode is obtained, where P is the pressure and S is the total contact area between the first probe 21 and the second probe 22 and the electrode.

[0102] The pressure P is not only the pressure of the first probe 21 and the second probe 22 in contact with the electrode, but also the gas pressure of the intake pipe 312. This is because the pressure of the first probe 21 and the second probe 22 is given by the gas in the intake pipe 312.

[0103] The process of obtaining pressure P is as follows: The gas flow rate from the intake pipe 312 to the first cylinder 311 is detected by the gas flow rate detector 32. The control component 40 calculates the gas mass m using the formula m = ρ * Q * t, where ρ is the gas density (customizable), Q is the gas flow rate, and t is time (the time control component 40 can obtain this by controlling the intake time of the intake pipe 312). Then, based on the gas mass m, the amount of gas n (moles) is calculated using the formula n = M / m, where M is the molar mass of the gas (a constant). Finally, the gas pressure P is calculated using the formula PV = nRT, where V is the volume of the intake pipe 312, n is the amount of gas obtained above, R is the ideal gas constant, and T is the absolute temperature (Kelvin).

[0104] In some examples, the electrode resistance measuring device 100 may optionally include a first bracket 60, a first drive assembly 30 mounted on the first bracket 60, and a first mounting member 11 connected to the first bracket 60 in a manner slidable along a first direction X.

[0105] The upper end of the first support 60 may be provided with a sliding groove (not shown in the figure), and the lower end of the first support 60 may be directly fixed to the ground of the factory or connected to the roller pressing equipment.

[0106] The first mounting component 11 is slidably connected to the slide groove, and the first bracket 60 provides support for the first mounting component 11 and can improve the stability of the first mounting component 11 during movement.

[0107] The first drive component 30 can be directly installed on the first bracket 60. The installation method can be a fixed connection, a detachable connection, or other mechanical connection methods. The first bracket 60 is used to install the first mounting part 11 and the first drive component 30, making it a multi-purpose unit.

[0108] In some examples, the first probe 21 is optionally configured to move along a second direction Y on the first mounting 11, the second direction Y intersecting the first direction X.

[0109] The second direction Y can be the length direction of the first mounting member 11. The second direction Y intersects with the first direction X, which means that the second direction Y and the first direction X form an angle greater than zero degrees and less than or equal to ninety degrees. In some embodiments, the second direction Y and the first direction X are perpendicular to each other.

[0110] In the specific application of the electrode resistance measuring device 100 in this embodiment, the first direction X and the second direction Y can be two directions that are perpendicular to each other on a horizontal plane.

[0111] The first probe 21 is designed to move along the second direction Y, which makes it easy to adjust the position of the first probe 21, so that the first probe 21 and the second probe 22 can cooperate better to clamp the electrode, thereby making the resistance measurement of the electrode more accurate.

[0112] In some examples, the electrode resistance measuring device 100 may optionally include a first moving member 14 and a second driving assembly (not shown in the figure), the second driving assembly being connected to the first moving member 14 and used to drive the first moving member 14 to move along the second direction Y, and the first probe 21 being mounted on the first moving member 14.

[0113] The first moving part 14 can be a structure similar to a slider, and the first moving part 14 can be slidably connected to the first mounting part 11.

[0114] The reason for configuring the first moving part 14 is that the first probe 21 is not convenient to be directly installed with the first mounting part 11.

[0115] Therefore, in this embodiment, the first probe 21 is installed and the first mounting component 11 is connected by the first moving component 14. The first moving component 14 and the first probe 21 can move synchronously along the second direction Y, which facilitates the installation of the probe and its movement along the second direction Y.

[0116] In addition, a second track groove (not shown in the figure) can be provided on the first mounting member 11, and a plurality of second rollers (not shown in the figure) can be installed on the second track groove. The first moving member 14 can be connected with the second rollers, thereby reducing the friction between the first moving member 14 and the first mounting member 11 when moving.

[0117] The second drive component may have the same or similar structure as the first drive component 30 mentioned above. For example, the second drive component may include a second linear reciprocating motion component, which may be a cylinder, an electric cylinder, or a hydraulic cylinder, etc. This embodiment will not list them one by one.

[0118] The first moving part 14 and the first probe 21 are moved along the second direction Y by the second driving component, thereby realizing the automation of the movement of the first moving part 14 and the first probe 21.

[0119] In this embodiment, both the first driving component 30 and the second driving component can be controlled by a control system, which may include the control component 40 described below.

[0120] In some examples, the second probe 22 is optionally configured to move along a second direction Y on the second mounting 13, the second direction Y intersecting the first direction X.

[0121] The second probe 22 is designed to move along the second direction Y, which makes it easy to adjust the position of the second probe 22, so that the second probe 22 and the first probe 21 can better cooperate to measure the electrode resistance.

[0122] The second probe 22 can be slidably connected to the second mounting member 13, and its linear movement along the second direction Y is controlled by a third drive component (not shown in the figure). For example, the second probe 22 is mounted on the second moving member 15, and the second moving member 15 is slidably connected to the second mounting member 13.

[0123] In some embodiments, the second probe 22 moves along the second direction Y on the second mounting member 13 in the same way as the first probe 21 moves on the first mounting member 11. Therefore, this embodiment will not elaborate on the specific connection method between the second probe 22 and the second mounting member 13.

[0124] Combined again with the appendix Figure 1-3 As shown, in some examples, the electrode resistance measuring device 100 may optionally include a first auxiliary conveyor assembly 70 for receiving the electrode located between the first mounting member 11 and the second mounting member 13.

[0125] The first auxiliary conveyor assembly 70 may be located below the first mounting member 11 and the second mounting member 13, and at least partially located between the projections of the first mounting member 11 and the second mounting member 13.

[0126] In some embodiments, the first auxiliary conveyor assembly 70 includes a second roller frame 71 and a second electrode conveying roller 72 mounted on the second roller frame 71.

[0127] When the electrode conveying device 200 delivers the electrode between the first mounting member 11 and the second mounting member 13, the second roller frame 71 can receive the electrode passing between the first mounting member 11 and the second mounting member 13, so that the electrode is in a more suitable position, which is convenient for subsequent resistance measurement.

[0128] Finally, please see the appendix. Figure 1-6As shown, this application embodiment provides an electrode resistance measuring device 100, including a mounting assembly 10 and a resistance measuring assembly 20. The mounting assembly 10 includes a first mounting member 11, a connector 12, and a second mounting member 13 connected in sequence. The first mounting member 11 and the second mounting member 13 are arranged parallel to each other and spaced apart. The first mounting member 11 is configured to move along a first direction X on the connector 12 to approach or move away from the second mounting member 13. The second mounting member 13 and / or the connector 12 are used to connect to the electrode conveying device 200 of the rolling mill. The first direction X is the arrangement direction of the first mounting member 11 to the connector 12. The resistance measuring assembly 20 includes a first probe 21 and a second probe 22. The first probe 21 is connected to the first mounting member 11, and the second probe 22 is connected to the second mounting member 13. The first mounting member 11 has a socket 111, and the connector 12 is inserted into the socket 111. The wall of the socket 111 is in rolling connection with the connector 12. The connector 12 has a first track groove 121 facing the wall of the socket 111. The length direction of the first track groove 121 extends along a first direction X. A plurality of first rollers 122 are installed in the first track groove 121, spaced apart along the first direction X. The wall of the socket 111 abuts against at least one first roller 122. The electrode resistance measuring device 100 also includes a first drive assembly 30, which is connected to the first mounting member 11 and is used to drive the first mounting member 11 to move on the connector 12. The first drive assembly 30 includes a first linear reciprocating motion member 31. The first linear reciprocating motion component 31 includes a first cylinder 311 and an air intake pipe 312. The air intake pipe 312 is used to supply air to the first cylinder 311. The electrode resistance measuring device 100 also includes a first pressure detection component 25, a second pressure detection component 26, a gas flow detection component 32, a control component 40, and a warning component 50. The first pressure detection component 25 is used to detect the first pressure on the first probe 21, the second pressure detection component 26 is used to detect the second pressure on the second probe 22, and the gas flow detection component 32 is used to detect the gas flow in the air intake pipe 312. The control component 40 is communicatively connected to the first pressure detection component 25, the second pressure detection component 26, the gas flow detection component 32, and the warning component 50. The control component 40 is configured to obtain the total contact area between the first probe 21 and the second probe 22 and the electrode based on the first pressure, the second pressure, and the gas flow, and to control the warning component 50 to issue a warning when the total contact area is less than a preset value. The electrode resistance measuring device 100 also includes a first bracket 60, a first drive assembly 30 mounted on the first bracket 60, and a first mounting member 11 slidably connected to the first bracket 60 along a first direction X. A first probe 21 is configured to move along a second direction Y on the first mounting member 11, the second direction Y intersecting the first direction X.The electrode resistance measuring device 100 further includes a first movable member 14, which is connected to the first mounting member 11 in a manner movable along a second direction Y. A first probe 21 is mounted on the first movable member 14. The electrode resistance measuring device 100 also includes a second driving assembly, which is connected to the first movable member 14 and is used to drive the first movable member 14 to move along the second direction Y. The second probe 22 is configured to move along the second direction Y on the second mounting member 13, the second direction Y intersecting the first direction X. The electrode resistance measuring device 100 also includes a first auxiliary conveyor assembly 70, which is used to receive the electrode located between the first mounting member 11 and the second mounting member 13. It also includes a first pressure detection element 25, a second pressure detection element 26, and a control component 40. The first pressure detection element 25 is connected to the first probe 21 and is used to detect the first pressure on the first probe 21. The second pressure detection element 26 is connected to the second probe 22 and is used to detect the second pressure on the second probe 22. The control component 40 is communicatively connected to the first pressure detection element 25 and the second pressure detection element 26 respectively.

[0129] Based on the above-described electrode resistance measuring device 100, such as Figure 7 As shown, this application provides an electrode rolling device 1000, including a rolling device 300, an electrode conveying device 200, and the aforementioned electrode resistance measuring device 100. The rolling device 300 is used to roll the electrode; the electrode conveying device 200 is used to convey the electrode; and the electrode resistance measuring device 100 is used to receive the electrode conveyed by the electrode conveying device 200 and to measure the resistance of the electrode.

[0130] The roller pressing device 300 is mainly used for roller pressing the electrode sheets to compact the active material layer on the electrode sheets, and it may include pressure rollers. The electrode sheet conveying device 200 is mainly used for conveying the electrode sheets during the roller pressing process.

[0131] In some embodiments, the electrode rolling equipment 1000 may further include an unwinding device 400, a first receiving platform 500, a second receiving platform 600, an electrode slitting device 700, and a winding device 800.

[0132] The electrode sheet enters the receiving platform through the unwinding device 400, and then enters the rolling device 300 through the electrode sheet conveying device 200. Subsequently, the electrode sheet conveying device 200 conveys the electrode sheet to the electrode sheet resistance measuring device 100 in this embodiment. During resistance measurement, the electrode sheet conveying device 200 stops. After measurement, the electrode sheet conveying device 200 continues to drive the electrode sheet to the electrode sheet slitting device 700 for electrode sheet slitting. Finally, the electrode sheet is wound back into a roll through the winding device 800.

[0133] The electrode rolling mill 1000 of this embodiment is equipped with an electrode resistance measuring device 100. The electrode resistance measuring device 100 receives the electrode conveyed by the conveying device and measures the resistance of the electrode. During the measurement, there is no need to tear off or transfer the electrode. The electrode in the rolling mill is measured directly, which not only frees up manpower and improves the measurement efficiency of electrode resistance, but also reduces or even avoids the loss of electrode during the resistance measurement process.

[0134] Combined with appendix Figure 5 and 6 As shown, in some examples, optionally, the electrode conveying device 200 includes a first roller frame 210 and a first electrode conveying roller 220 mounted on the first roller frame 210, and a second mounting member 13 and / or a connector 12 is detachably connected to the first roller frame 210.

[0135] The first electrode conveying roller 220 is mounted on the first roller frame 210 in a manner that allows it to rotate about its own axis, and is used to convey electrodes to the electrode resistance measuring device 100 of this embodiment. By using the first roller frame 210 as the mounting base for the electrode conveying device 200, and without configuring too many support and fixing structures for the electrode conveying device 200, the equipment structure is simplified and the production cost is reduced.

[0136] The above technical solution includes three implementation methods. One method involves a detachable connection between the second mounting component 13 and the first roller frame 210, while the connecting component 12 is not connected to the first roller frame 210. Another method is as follows... Figure 5 The second mounting component 13 shown is not connected to the first roller frame 210, while the connecting component 12 is detachably connected to the first roller frame 210. Alternatively, the second mounting component 13 and the connecting component 12 are detachably connected to the first roller frame 210, respectively.

[0137] A detachable connection means that two components (such as connector 12 and first roller frame 210) can be removed after installation without damaging the original structure.

[0138] There are various ways to detach the connection, such as threaded connection, snap-fit, and plug-in connection, which will not be listed one by one in this embodiment.

[0139] The second mounting component 13 and / or the connector 12 are designed to be detachably connected to the first roller frame 210, which facilitates the installation and removal of the electrode resistance measuring device 100 and the electrode conveying device 200, facilitates the inspection and maintenance of the electrode resistance measuring device 100, and allows the electrode resistance measuring device 100 in one set of equipment to be removed and installed in another set.

[0140] Based on the electrode rolling equipment 1000 described above, this application provides a battery production system, including the electrode rolling equipment 1000 as described above. The battery production system may also include an electrode coating equipment and a drying equipment (not shown in the figure), used to coat the electrode. The electrode rolling equipment 1000 is used to roll the coated electrode, and the drying equipment is used to dry the coated electrode.

[0141] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An electrode resistance measuring device, characterized in that, include: The mounting assembly includes a first mounting member, a connector, and a second mounting member connected in sequence. The first mounting member and the second mounting member are arranged in parallel and spaced apart. The first mounting member is configured to move along a first direction on the connector to move closer to or away from the second mounting member. The second mounting member and / or the connector are used to connect an electrode conveying device of a roller pressing equipment. The first direction is the arrangement direction from the first mounting member to the connector. A resistance measurement assembly includes a first probe and a second probe, wherein the first probe is connected to a first mounting component and the second probe is connected to the second mounting component.

2. The electrode resistance measuring device according to claim 1, characterized in that, The first mounting component has a socket, and the connector is inserted into the socket, with the wall of the socket being rolledly connected to the connector.

3. The electrode resistance measuring device according to claim 2, characterized in that, The connector is provided with a first track groove facing the wall of the insertion hole. The length direction of the first track groove extends along the first direction. A plurality of first rollers are installed in the first track groove and are spaced apart along the first direction. The wall of the insertion hole abuts against at least one of the first rollers.

4. The electrode resistance measuring device according to claim 1, characterized in that, The electrode resistance measuring device further includes a first driving component, which is connected to the first mounting component and is used to drive the first mounting component to move along the first direction.

5. The electrode resistance measuring device according to claim 4, characterized in that, The first driving assembly includes a first cylinder and an intake pipe, the intake pipe being used to supply air to the first cylinder. The electrode resistance measuring device further includes a first pressure detection element, a second pressure detection element, a gas flow detection element, a control component, and a warning component. The first pressure detection element is used to detect a first pressure on the first probe, the second pressure detection element is used to detect a second pressure on the second probe, the gas flow detection element is used to detect the gas flow rate of the intake pipe, and the control component is communicatively connected to the first pressure detection element, the second pressure detection element, the gas flow detection element, and the warning component. The control component is configured to obtain the total contact area between the first probe and the second probe and the electrode based on the first pressure, the second pressure, and the gas flow rate, and to control the warning component to issue a warning when the total contact area is less than a preset value.

6. The electrode resistance measuring device according to claim 4, characterized in that, The electrode resistance measuring device further includes a first bracket, the first drive assembly is mounted on the first bracket, and the first mounting member is slidably connected to the first bracket along the first direction.

7. The electrode resistance measuring device according to claim 1, characterized in that, The first probe is configured to move on the first mounting in a second direction that intersects the first direction.

8. The electrode resistance measuring device according to claim 7, characterized in that, The electrode resistance measuring device further includes a first moving component and a second driving component. The second driving component is connected to the first moving component and is used to drive the first moving component to move along the second direction. The first probe is mounted on the first moving component.

9. The electrode resistance measuring device according to any one of claims 1-8, characterized in that, The second probe is configured to move on the second mounting in a second direction that intersects the first direction.

10. The electrode resistance measuring device according to any one of claims 1-8, characterized in that, The electrode resistance measuring device further includes a first auxiliary conveyor assembly, which is used to receive the electrode located between the first mounting member and the second mounting member.

11. An electrode rolling mill, characterized in that, include: Roll forming device, used for rolling electrode sheets; An electrode conveying device is used to convey the electrode. as well as The electrode resistance measuring device according to any one of claims 1-10, wherein the electrode resistance measuring device is used to receive the electrode conveyed by the electrode conveying device and to measure the resistance of the electrode.

12. The electrode rolling equipment according to claim 11, characterized in that, The electrode conveying device includes a first roller frame and a first electrode conveying roller mounted on the first roller frame, wherein the second mounting member and / or the connecting member are detachably connected to the first roller frame.

13. A battery production system, characterized in that, Includes the electrode rolling equipment as described in any one of claims 11 and 12.

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