Clamp, formation apparatus, formation apparatus output synchronization method, and synchronization determination method

Abstract

The application discloses a clamp, a formation equipment, a formation equipment output synchronization method and a synchronization determination method, and relates to the technical field of battery processing and manufacturing. The clamp comprises a heating film and two hard heat-conducting plates, and the two hard heat-conducting plates are arranged on opposite sides of the heating film. According to the clamp for battery formation in the embodiment of the application, the heating film is powered to supply heat, the hard heat-conducting plates with certain hardness and rigidity are used to conveniently clamp the battery monomer, and the compression restraining force is applied to the battery monomer. Moreover, the hard heat-conducting plates are used as plate bodies, when the clamp is subjected to force on one side, the pressure is applied to the hard heat-conducting plate on the one side, and then the pressure is transmitted to the hard heat-conducting plate on the other side, so that the structure is convenient to improve the force uniformity of the battery monomer. The heat conductivity of the two hard heat-conducting plates can make the heating uniformity of the battery monomer better, so that the formation quality of the battery monomer can be improved.

Description

Technical Field

[0001] This invention relates to the field of battery processing and manufacturing technology, specifically to a fixture for battery formation and a battery formation device, and also to a method for output synchronization of multiple drive ends of the formation device and a method for determining output synchronization of multiple drive ends of the formation device. Background Technology

[0002] Existing technology discloses a type of battery clamping formation machine that integrates battery pressurization, heating, formation, and cooling into a single system, thereby improving production efficiency. However, in practice, uneven heating of the batteries has been found, which can easily damage them, necessitating improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a clamp for battery formation that can clamp battery cells while simultaneously heating them, and improve heating uniformity.

[0004] The present invention also aims to provide a battery formation apparatus having the above-described fixture for battery formation.

[0005] The present invention also aims to propose an output synchronization method for multiple drive ends of the above-mentioned formation equipment.

[0006] The present invention also aims to propose an output synchronization determination method for the multi-drive end of the above-mentioned formation equipment.

[0007] According to an embodiment of the present invention, a fixture for battery formation includes: a heating film; and two rigid heat-conducting plates disposed on opposite sides of the heating film.

[0008] According to an embodiment of the present invention, a clamp for battery formation is heated by an electrically energized heating film. A rigid heat-conducting plate with a certain hardness and rigidity is used to conveniently clamp battery cells and apply a compressive force to them. Furthermore, since the rigid heat-conducting plate acts as a plate, when the clamp is subjected to force on one side, the pressure is applied to that side of the rigid heat-conducting plate and then transferred to the other side. This structure facilitates improved uniformity of force distribution on the battery cells. The thermal conductivity of the two rigid heat-conducting plates further enhances the uniformity of heating within the battery cells, thus improving the formation quality of the battery cells.

[0009] This type of clamp has a simple structure, and the uniform heating film is protected by rigid heat-conducting plates on both sides, making it less prone to damage. It is suitable for both low-load and high-load pressure conditions, can withstand a wide range of loads, and has strong compatibility with battery cells of different sizes.

[0010] In some embodiments, the clamp further includes a thermally conductive silicone grease layer sandwiched between the rigid heat-conducting plate and the heating film.

[0011] Specifically, the heating film is a polyimide heating film, and the rigid heat-conducting plate is an aluminum plate.

[0012] A battery formation apparatus according to an embodiment of the present invention includes: a frame module, the frame module including a guide rod; a clamp for battery formation as described in the above embodiment, the clamp being at least two and slidably fitted on the guide rod, a battery cell being clamped between two adjacent clamps; and a pressurizing module disposed on the frame module and located at at least one end in the length direction of the guide rod, the pressurizing module pressing against adjacent clamps and pushing the clamps to press the battery cell.

[0013] In some embodiments, the pressurization module includes at least two pressurization drives, each pressurization drive having an output shaft movable along the length of the guide rod, the output shaft pressing against an adjacent clamp; At least two of the pressure-applying drive elements are located at the same end along the length of the guide rod, or the pressure-applying drive elements are provided at both ends along the length of the guide rod.

[0014] Specifically, the frame module is provided with at least two of the pressurizing drive components, one end of which is a multi-drive end.

[0015] The formation equipment further includes: output detection elements disposed at the multiple drive ends, wherein each pressurizing drive element is provided with at least one output detection element to detect the output quantity of the pressurizing drive element. The pressurizing drive elements at the multiple drive ends are electrically connected to the detection results of the output detection elements to drive synchronously according to the detection results. The output detection element includes at least one of a displacement detection element and a pressure detection element.

[0016] According to the present invention, a method for output synchronization of multiple drive terminals of a formation device, applied to the above-mentioned formation device, includes the following steps: Detect the output of each of the pressurized drive components at the multi-drive end; When the difference between the outputs of any two pressurizing actuators exceeds a set range, the current output rate of the pressurizing actuator is adjusted so that the current output rate of the pressurizing actuator with the smaller output is greater than the current output rate of the pressurizing actuator with the larger output. When the difference between the outputs of any two pressurizing actuators is within the set range, the current output rates of the two pressurizing actuators are kept equal.

[0017] The present invention provides a method for determining the output synchronization of multiple driving ends of a formation device, which is applied to the aforementioned formation device.

[0018] The pressurizing module further includes: a pressure plate, which is slidably fitted onto the guide rod. The pressure plate is located at at least one end of the guide rod along its length. The output shaft of the pressurizing drive is connected to the pressure plate to press the clamp. The output detection element includes at least four displacement detection elements, each of which is used to detect the displacement of a corresponding point on the pressure plate to measure the output of the pressurizing drive.

[0019] Any three of the aforementioned locations form a triangular plane, and the pressure plate forms at least four such triangular planes. The three endpoints of each triangular plane are a first endpoint, a second endpoint, and a third endpoint, respectively. A first vector extends from the first endpoint to the second endpoint, and a second vector extends from the first endpoint to the third endpoint. The vector product of the first vector and the second vector is the normal line of the triangular plane.

[0020] When at least N normal lines are parallel, it is determined that the output of the pressurized drive at the multi-drive end is equal, where N is a natural number greater than or equal to 2.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an overall perspective view of the formation equipment in some embodiments; Figure 2 This is an exploded view of the fixture in some embodiments; Figure 3 This is another exploded view of the fixture in some embodiments; Figure 4 A perspective view of the fixture in some embodiments; Figure 5 This is a partial side view of the fixture in some embodiments; Figure 6 This is a schematic diagram showing the clamping positions of two clamps holding a single battery cell in some embodiments; Figure 7 This is a simulation diagram of the surface temperature distribution of the fixture when it is electrically heated in some embodiments; Figure 8 A perspective view of the rack module of the formation device in some embodiments; Figure 9 This is a schematic diagram showing the assembly positions of the frame module and pressurization module of the formation device in some embodiments; Figure 10 This is a perspective view of the pressure plate in the front view direction in some embodiments; Figure 11 In some embodiments, the pressure plate is shown in the rear view; Figure 12 for Figure 1 The center circle shows a magnified view of point G; Figure 13 The simulation comparison diagrams show the deformation distribution of the fixture under central and lateral pressure in some embodiments. Figure 14 Here are simulation diagrams showing the surface deformation distribution of the fixture under pressure in some embodiments; Figure 15 This is a triangular planar diagram formed by four location points in some embodiments; Figure 16 This is a schematic diagram of the normal lines of a triangular plane formed by four location points in some embodiments.

[0023] Figure label: Chemical formation equipment 100 Rack Module 1 Frame module 2, guide rod 21, support plate 22, support rod 23 Pressurization module 3, second socket 303, position sensing unit 307, pressurization drive unit 31, output shaft 311, pressure plate 32, sliding sleeve 34, chain connecting plate 35, and hook 36. Chain 4 5. Fixture; 501. First set of holes; 502. Connecting pin; 51. Heating film; 52. Rigid heat-conducting plate; 53. Thermal grease layer; 54. Temperature sensor; 55. Insulating film; 56. Elastic pressure plate; 57. Charging / discharging circuit board; 58. Spring body; 59. Bushing. Output detection element 70, displacement detection element 71, pressure detection element 72 200 cells per battery. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "axial," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following description, with reference to the accompanying drawings, describes a clamp 5 for battery formation according to an embodiment of the present invention. The clamp 5 is a clamping member of the formation equipment 100 for applying a restraining force to a battery cell 200.

[0027] Reference Figure 1 As is known to those skilled in the art, formation equipment is a type of specialized equipment primarily used in the core process of battery manufacturing, namely the formation process. Its core function is to activate the electrochemically active materials inside the newly produced bare battery through specific charge-discharge operations, forming a stable electrode interface (such as the SEI film in lithium-ion batteries), ultimately enabling the battery to possess key performance characteristics such as rated charge-discharge capacity, capacity, and cycle life. Here, a bare battery refers to a battery whose core components, such as electrodes, electrolyte, and separator, have been assembled but have not yet formed effective electrochemical performance.

[0028] In a type of formation equipment, the battery needs to be pressurized and heated during the formation process. The fixture 5 disclosed below in this application is a clamping tool for pressurizing and heating the battery during the formation process. Many existing solutions disclose the use of plate-shaped fixtures to clamp individual battery cells, but these all suffer from uneven heating to varying degrees. To solve these problems, this application proposes a fixture 5 for battery formation.

[0029] Reference Figure 2 and Figure 3According to an embodiment of the present invention, a fixture 5 for battery formation includes a heating film 51 and two rigid heat-conducting plates 52, the two rigid heat-conducting plates 52 being disposed on opposite sides of the heating film 51.

[0030] The clamp 5 is similar to a three-layer structure assembly. It is heated by electricity via a heating film 51, and the rigid heat-conducting plate 52, with its certain hardness and rigidity, easily clamps the battery cell 200, applying a compressive force to it. Furthermore, the rigid heat-conducting plate 52 acts as a plate; when the clamp 5 is under force on one side, the pressure is applied to that side's rigid heat-conducting plate 52, and then transferred to the other side. This structure facilitates improved uniformity of force distribution on the battery cell 200. The thermal conductivity of the two rigid heat-conducting plates 52 further enhances the uniformity of heating of the battery cell 200, thus improving the formation quality of the battery cell 200.

[0031] Specifically, such as Figure 6 As shown, the clamps 5 are vertically arranged, and one clamp 5 is provided on each of the two lateral sides of the battery cell 200. The two clamps 5 are close to and press the battery cell 200 together to provide restraint pressure. This allows the battery cell 200 to be subjected to uniform force on both lateral sides, without needing to consider the load of the longitudinal mechanism.

[0032] The fixture 5 of this structure is simple, and the uniform heating film 51 is protected by rigid heat-conducting plates 52 on both sides, making it less prone to damage. It is suitable for both low-load and high-load pressure conditions, has a wide load capacity, strong compatibility with different sized battery cells 200, and is backward compatible with cell formation pressure. It provides a more stable production solution by addressing the overall performance and reliability of the battery.

[0033] Specifically, on the clamp 5, the heating film 51 is centrally positioned, with rigid heat-conducting plates 52 arranged on both sides. Further, the clamp 5 has a layered structure and is connected and fixed by fasteners. For example, both the heating film 51 and the rigid heat-conducting plates 52 have connection holes, and the fasteners pass through the layered structure sequentially for connection. Optionally, the fasteners include screws and nuts.

[0034] Specifically, a bonding layer is provided between the rigid heat-conducting plate 52 and the heating film 51 to fix the rigid heat-conducting plate 52 and the heating film 51. Optionally, the bonding layer is a thermally conductive adhesive, which can bond the rigid heat-conducting plate 52 and the heating film 51 together to prevent loosening and has thermal conductivity. Optionally, the thermally conductive adhesive can be a metal-based thermally conductive adhesive, a ceramic-based thermally conductive adhesive, or a carbon-based thermally conductive adhesive, etc., and there is no limitation here.

[0035] In some specific embodiments, such as Figure 2As shown, the fixture 5 also includes a thermally conductive silicone grease layer 53, which is sandwiched between at least one rigid heat-conducting plate 52 and a heating film 51. The thermally conductive silicone grease layer 53 is used to fill the gap between the rigid heat-conducting plate 52 and the heating film 51, thereby improving thermal conductivity and preventing dry burning.

[0036] In some specific embodiments, the heating film 51 is a polyimide heating film. Specifically, the polyimide heating film can be composed of two layers of polyimide film bonded together with a resistive heating core through high-temperature hot pressing. Optionally, the resistive heating core is a nickel-chromium alloy heating element. The polyimide heating film has a wide temperature resistance range, maintaining stable performance under extreme temperature conditions, such as -269°C to 400°C. It also possesses excellent insulation properties, effectively preventing leakage and short circuits, ensuring safe use. Furthermore, the polyimide heating film is thin, flexible, and not easily damaged under pressure. Moreover, the polyimide heating film ensures good conductivity and uniform heat distribution, avoiding localized overheating. Furthermore, the heating speed and temperature of the polyimide heating film can be adjusted according to specific needs to meet the heating requirements of different application scenarios.

[0037] In some specific embodiments, the rigid heat-conducting plate 52 is an aluminum plate. Using an aluminum plate as the rigid heat-conducting plate 52 is advantageous because aluminum has a high thermal conductivity, far exceeding that of steel, plastics, etc. This results in rapid heat conduction, preventing localized heat accumulation, and the aluminum plate itself has excellent heat diffusivity, dispersing concentrated heat across the entire plate surface and reducing temperature differences.

[0038] Moreover, aluminum sheets have excellent plasticity and ductility, making them easy to process and preventing them from cracking under heavy loads. They are also relatively lightweight and can withstand lower loads.

[0039] Of course, the rigid heat-conducting plate 52 in this application can also be made of other materials with high thermal conductivity, such as ceramic plates.

[0040] In some specific embodiments, such as Figure 3 and Figure 4 As shown, a temperature sensor 54 is also provided on the fixture 5 to monitor temperature changes, facilitating control via PID regulation. In some embodiments, the PID method can control the temperature of the rigid heat-conducting plate 52 within a range of ±3°C. Furthermore, the temperature sensor 54 is at least partially disposed on the rigid heat-conducting plate 52, for example, at the bottom of the rigid heat-conducting plate 52. In some designs, the temperature sensor 54 is also disposed on the heating film 51 to improve temperature control accuracy.

[0041] Specifically, such as Figure 6 As shown, an insulating film 55 is connected between every two clamps 5. This film is used to fix the battery cell 200 and provides insulation protection. The insulating film 55 also ensures that the battery leads are in complete contact with the charging and discharging contacts.

[0042] Optionally, the insulating film 55 has a thickness of 0.08mm-0.1mm and has undergone tests for insulation, pressure resistance, puncture, and high temperature shrinkage rate to ensure that it will not deform under high pressure and long-term use.

[0043] In some embodiments, such as Figure 4 and Figure 5 As shown, the clamp 5 has an elastic pressure plate 56 on one side in the thickness direction and a charging / discharging circuit board 57 on the other side. The elastic pressure plate 56 and the charging / discharging circuit board 57 are configured to realize the charging and discharging function of the battery cell 200.

[0044] Specifically, such as Figure 6 As shown, when the battery cell 200 is placed between the two clamps 5, the lead-out piece (not shown) on the battery cell 200 is connected to the charging / discharging contact on the charging / discharging circuit board 57 on one of the clamps 5. The other clamp 5 is provided with a corresponding elastic pressure plate 56, which can press the lead-out piece tightly to ensure that the lead-out piece is completely in contact with the charging / discharging contact during the charging / discharging process.

[0045] Specifically, the elastic pressure plate 56 has insulation and heat resistance. Both the elastic pressure plate 56 and the charging / discharging circuit board 57 protrude from the rigid heat-conducting plate 52 of the clamp 5. The rigid heat-conducting plate 52 clamps the housing of the battery cell 200, while the elastic pressure plate 56 and the charging / discharging circuit board 57 clamp the lead-out tabs of the battery cell 200.

[0046] Optionally, the elastic pressure plate 56 is a rubber sheet.

[0047] In some specific embodiments, such as Figure 5 As shown, the fixture 5 also includes an insulating layer on the surface of the rigid heat-conducting plate 52. The insulating layer can be a plating layer, thereby ensuring uniformity. Specifically, the insulating layer is a wear-resistant and high-temperature resistant insulating plating layer.

[0048] Specifically, such as Figure 5 As shown, the clamp 5 also includes a spring body 58 disposed on a rigid heat-conducting plate 52, and an elastic pressure plate 56 connected to the spring body 58 to maintain a large elastic clamping force.

[0049] Optionally, the spring body 58 is a tower spring and is welded to a rigid heat-conducting plate 52. Further optionally, there are at least two spring bodies 58 with different diameters, with the larger diameter spring body 58 fitted over the smaller diameter spring body 58, and the spring bodies 58 of different diameters having different lengths. This fitted-over-smaller diameter configuration allows for the compression of battery cells 200 of different thicknesses.

[0050] The charge / discharge circuit board 57 includes a substrate, charging / discharging contacts, and detection contacts on the substrate. Optionally, the substrate may be FR4 (Flame Retardant 4). Optionally, the contacts on the substrate may be made of copper with a gold-plated surface, and the shape of the contacts on the electrode surface may be serrated or knurled to improve conductivity.

[0051] Specifically, the charging and discharging contacts are dual-path, allowing for both charging and discharging. Specifically, the detection contacts are used to detect the accuracy of current and voltage during charging and discharging, and to control the on / off state of the charging function.

[0052] Specifically, such as Figure 4 As shown, there are two charging / discharging circuit boards 57, which are arranged at intervals along the length of the clamp 5, and the elastic pressure plate 56 is set one-to-one with the charging / discharging circuit board 57. This can accommodate battery cells 2 with leads at one end, as well as battery cells 2 with leads at both ends.

[0053] Furthermore, the elastic pressure plate 56 extends along the width direction of the clamp. Furthermore, the charging / discharging circuit board 57 extends along the width direction of the clamp.

[0054] In this application, the fixture 5 uses a polyimide heating film in the middle and aluminum plates on both sides, which solves the problem of inconsistent temperature on both sides of the heating plate, and the heating uniformity is particularly outstanding under heavy loads. For example, in one specific embodiment... Figure 7 As shown, when the fixture 5 is used as a heat source for simulation analysis, the surface temperature of the entire fixture 5 is between 44.6 degrees and 46 degrees, and the temperature difference on the entire aluminum plate is within ±1.4 degrees, indicating good temperature uniformity.

[0055] Understandably, conventional clamps in existing technologies consist of three parts: an electric heating plate attached to the pressure plate surface, a silicone pad attached to the outer surface, and a heating plate on the outer surface. This structure is suitable for small-load pressurization conditions. However, under heavy load pressurization, the silicone pad will break, and the heating plate being attached to only one side of the pressure plate will cause uneven temperatures on both sides. To address these shortcomings, a three-layer composite structure was designed based on research into pressure-bearing structures and heat sources. Aluminum is used for pressure bearing and heat transfer. Verification tests showed that aluminum has the best pressure resistance and thermal conductivity. The heating method was determined by comparing detailed parameters such as ambient temperature, power density, and insulation resistance, ultimately using a PI heating film as the heating material. Temperature control is achieved through a temperature sensor and PID regulation to regulate the temperature at each stage.

[0056] Through thermal simulation, the temperature range of this structure is ±1.4℃, which can meet most application scenarios.

[0057] The battery formation apparatus 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0058] According to an embodiment of the present invention, a battery formation apparatus 100 is described, with reference to... Figure 1 It includes: frame module 2, clamp 5 for battery formation and pressurization module 3 as described in the above embodiment.

[0059] The frame module 2 includes a guide rod 21, and at least two clamps 5 are slidably fitted onto the guide rod 21. The battery cell 200 is used to clamp between two adjacent clamps 5. A pressurizing module 3 is provided on the frame module 2 and located at at least one end along the length of the guide rod 21. The pressurizing module 3 abuts against the adjacent clamp 5 and pushes the clamp 5 to press the battery cell 200.

[0060] According to the embodiment of the present invention, the formation equipment 100, by setting the clamp 5 of the above embodiment, can uniformly clamp and heat the battery cell 200, and can withstand large load pressure, thereby improving the formation quality.

[0061] In some embodiments, such as Figure 1 As shown, the chemical formation equipment 100 also includes a frame module 1, which supports the entire equipment. Specifically, as... Figure 8 As shown, the rack module 1 has a rectangular frame structure, which is stable and simple in structure.

[0062] Specifically, the formation equipment 100 also includes a power supply module (not shown in the figure), which is mounted on the frame module 1 or located on one side of the frame module 1, for supplying power to the pressurization module 3, the clamp 5, etc.

[0063] In some embodiments, such as Figure 9 As shown, frame module 2 includes support plates 22 and support rods 23. There are two support plates 22, which are spaced apart along the length of the guide rod 21. Multiple support rods 23 connect the two support plates 22 to form a fixed frame structure that bears the axial restraint force. Specifically, the support plate 22 is a rectangular plate, and there are four support rods 23 connected at the four corners of the support plate 22.

[0064] Reference Figure 8 and Figure 9 The rack module 1 has two spaced mounting plates for mounting and fixing two support plates 22. Specifically, the rack module 1 also has a separate mounting plate for mounting and fixing the pressurization module 3.

[0065] Specifically, such as Figure 9 As shown, the two ends of the guide rod 21 are connected to two support plates 22, and are supported by the support plates 22 and the support rod 23.

[0066] Specifically, the guide rod 21 is surrounded by multiple support rods 23. Optionally, there are at least two guide rods 21 arranged in parallel to support the clamp 5 and prevent the clamp 5 from rotating. Optionally, there are four guide rods 21 arranged in a matrix to improve the stability of the clamp 5.

[0067] In some specific embodiments, such as Figure 4 As shown, the clamp 5 is provided with a first set of holes 501, through which the guide rod 21 is fitted.

[0068] Specifically, such as Figure 4 As shown, the fixture 5 also includes a bushing 59 that fits into the first hole 501. Optionally, the bushing 59 is an oil-free bushing, and it is fitted onto the guide rod 21 to achieve an axial sliding fit. The bushing 59 and the guide rod 21 are arranged in a one-to-one correspondence.

[0069] In some embodiments, such as Figure 1 and Figure 9 As shown, the pressurizing module 3 also includes a pressurizing drive unit 31, which is mounted on the rack module 1 or frame module 2, such as on the mounting plate of the rack module 1. The output end of the pressurizing drive unit 31 is movable along the length of the guide rod 21 and is used to press against the clamp 5. When the output end moves away from the clamp 5, the clamp 5 is released, and the battery cell 200 can be placed in or removed between the two clamps 5. When the output end moves toward the clamp 5, pressure is applied to the clamp 5, and the pressurizing module 3 pushes the clamp 5 to clamp the battery cell 200.

[0070] Specifically, such as Figure 9 As shown, the pressure drive 31 has an output shaft 311 that is movable along the length of the guide rod 21, and the output shaft 311 is used to press against the adjacent clamp 5.

[0071] In this application, the structure of the pressure driving component 31 is not limited, and may include a servo motor. The servo motor can be connected to the output shaft through a lead screw-nut mechanism or a gear and rack mechanism, thereby converting the rotation output by the servo motor into the movement of the output shaft 311. Of course, this application is not limited to this; in some applications, the pressure driving component 31 includes a linear motor, which can also drive the output shaft 311 to move linearly.

[0072] In some specific embodiments, the pressurizing module 3 includes at least two pressurizing drive members 31. The at least two pressurizing drive members 31 can be located at the same end of the guide rod 21 along its length, meaning the clamp 5 is subjected to pressure from the pressurizing module 3 on one side, while the other side can be supported by a stop from the frame module 2. Alternatively, the at least two pressurizing drive members 31 can be located at both ends of the guide rod 21 along its length, meaning the clamp 5 is subjected to pressure from the pressurizing module 3 on both sides.

[0073] In this application, due to the improved structure of the clamp 5, the clamp 5 has a larger pressure-bearing range. At this time, the output force can be accumulated by increasing the number of pressure-driving components 31, thus providing a greater restraint force.

[0074] If space constraints are not a concern, the span of the guide rod 21 can be shortened, and the dual pressure drive components 31 can be staggered and placed on both sides of the battery to apply pressure simultaneously. This structure can solve the deformation problem and ensure the consistency of battery pressure.

[0075] For example, existing technologies use a single-cylinder pressurization scheme with a restraint pressure range of 5 to 20T. The pressurization point is in the middle of the battery cell, resulting in insufficient pressure and an unadjustable pressure range, making it unsuitable for simultaneous production of liquid and solid-state batteries on the same production line. This application increases the number of pressurization drive components 31 to provide a greater restraint pressure, even achieving a restraint pressure compatibility range of 0T to 120T. This higher load pressure can simultaneously meet the needs of both solid-state and liquid batteries, enabling co-line production.

[0076] In some embodiments, such as Figure 1 As shown, the pressurizing module 3 also includes a pressure plate 32, which is slidably fitted onto the guide rod 21. Along the length of the guide rod 21, the pressure plate 32 is located at at least one end of the guide rod 21. The output end of the pressurizing drive member 31 is connected to the pressure plate 32. Alternatively, the pressure plate 32 is located between the output end of the pressurizing drive member 31 and the clamp 5. The pressurizing module 3 transmits pressure evenly to the clamp 5 through the pressure plate 32, ensuring that adjacent clamps 5 receive uniform surface pressure.

[0077] Specifically, when the pressurizing module 3 is located on one side of the frame module 2, there is one pressure plate 32. When both sides of the frame module 2 are equipped with pressurizing modules 3, both pressurizing modules 3 can press the clamp 5 through the pressure plate 32.

[0078] Specifically, the pressure driving component 31 is used to drive the pressure plate 32 to move along the length direction of the guide rod 21, and the pressure plate 32 applies pressure to the clamp 5, which is then transmitted to the battery cell 200 by the clamp 5.

[0079] Specifically, such as Figure 10 and Figure 11 As shown, the pressure plate 32 is provided with a second set of holes 303, which are fitted onto the guide rod 21.

[0080] More specifically, such as Figure 11 As shown, the pressurization module 3 also includes a sliding sleeve 34 that fits into the second hole 303. The sliding sleeve 34 is fitted onto the guide rod 21 to achieve an axial sliding fit. The sliding sleeve 34 and the guide rod 21 are arranged in a one-to-one correspondence.

[0081] In some specific embodiments, such as Figure 12As shown, the formation device 100 also includes a chain 4 connected to a pressurizing module 3, which is tensioned or relaxed as the output end of the pressurizing module 3 moves. If both ends of the frame module 2 are equipped with pressurizing modules 3, then both ends of the chain 4 are connected to pressurizing modules 3.

[0082] The chain 4 has chain holes, and multiple clamps 5 engage with these evenly spaced chain holes to maintain uniform spacing between the clamps 5. When the output end of the pressurizing module 3 moves away from the clamps 5, the chain 4 is tensioned. The chain 4 then moves the clamps 5 connected to it along the guide rod 21, allowing the clamps 5 to move away from each other at approximately equal intervals. This opens up the space between adjacent clamps 5, facilitating the placement and removal of battery cells 200. When the output end of the pressurizing module 3 moves towards the clamps 5, the pressurizing module 3 gradually clamps the clamps 5, reducing the space between adjacent clamps 5, while the chain 4 hangs downwards from the middle.

[0083] The cooperation between chain 4, clamps 5, and pressure module 3 ensures that each clamp 5 can be adjusted and retracted at equal intervals. Furthermore, when the thickness of the clamped battery cells 200 varies, the connection position of the clamps 5 within the chain holes of chain 4 can be adjusted. This provides a solution for constraints on battery cells 200 with different thicknesses.

[0084] Specifically, such as Figure 4 and Figure 12 As shown, each clamp 5 is equipped with a connecting pin 502, and the connecting pins 502 on multiple clamps 5 are respectively connected to the chain 4 to ensure that each clamp 5 is equally spaced. Optionally, the fixed end of the chain 4 is connected to the non-electric cylinder side of the frame module 2, the moving end is fixed to the chain connecting plate 35, and the connecting plate 22 is fixed to the pressure module 3. By moving the electric cylinder, the pressure module 3, the chain connecting plate 35, and the multiple clamps 5 can be moved.

[0085] In some embodiments, such as Figure 12 and Figure 9 As shown, the formation equipment 100 also includes an output detection element 70, which further includes a pressure detection element 72 for detecting the pressure applied by the pressurization module 3 to the fixture 5. The pressurization module 3 is electrically connected to the pressure detection element 72 to adjust the pressure based on the detection results. In other words, the pressure condition of the battery cell 200 can be determined through the pressure detection element 72, realizing a pressure self-regulation function.

[0086] Optionally, such as Figure 9 As shown, the pressure detection element 72 is sleeved on the output shaft 311 of the pressure driving element 31, which makes it easy to measure the output pressure of the pressure driving element 31 from the source as soon as possible, and adjust it in time to avoid damage to the battery cell 200 due to excessive pressure.

[0087] In some specific embodiments, such as Figure 12As shown, the pressurizing module 3 is flexibly connected to the pressure detection element 71 via the pressure plate 32. Here, the pressurizing module 3 transmits pressure to the clamp 5 via the pressure plate 32 to hold the battery cell 200. When the pressure plate 32 and the pressure detection element 71 are flexibly connected, the pressure detection element 71 can detect the pressure on the pressure plate 32, and the flexible connection position can alleviate excessive force.

[0088] Specifically, such as Figure 10 As shown, the pressure plate 32 is equipped with a hook 36, which hooks onto the pressure detection element 71. Thus, when the pressure plate 32 moves away from the clamp 5 to release the battery cell 200, the hook 36 releases force. Conversely, when the output shaft 311 of the pressure drive element 31 pushes the pressure plate 32 to clamp, the hook 36 engages with the pressure detection element 72 to transmit force.

[0089] In some embodiments, such as Figure 9 As shown, the frame module 2 is provided with at least two pressure driving components 31, one end of which is a multi-drive end. Specifically, at least two pressure driving components 31 are arranged at intervals along the length direction of the clamp 5.

[0090] Reference Figure 13 As shown, (a) is a simulation diagram of the deformation distribution when the clamp 5 is compressed in the center, and (b) is a simulation diagram of the deformation distribution when the clamp 5 is compressed on both sides. The comparison clearly shows that when there are two pressure-applying drive components 31 distributed on both sides of the clamp 5, the overall deformation of the clamp 5 is significantly less than that when it is compressed in the center. Therefore, in multi-drive applications, at least two pressure-applying drive components 31 can be arranged at intervals along the length of the clamp 5 to ensure uniform force distribution on the battery cell 200 and the clamp 5, resulting in smaller deformation.

[0091] In one specific embodiment, the clamp 5 uses a polyimide heating film in the middle and aluminum plates on both sides. Under heavy load and dual-cylinder drive, the surface deformation distribution of the clamp 5 after being subjected to force is shown in the diagram below. Figure 14 As shown. The surface deformation of this structure is within 0.285mm, which can meet the requirements of most application scenarios.

[0092] It is understandable that when there are at least two pressurizing drive units 31 at the multi-drive end, all pressurizing drive units 31 at the multi-drive end need to control the output to be consistent so that the force distribution on the fixture 5 is uniform.

[0093] Taking the pressure drive component 31 as an electric cylinder with two cylinders as an example, due to the large output load, this application provides a solution for asynchronous operation of the two electric cylinders in structures using a dual-axis drive mode. It should be noted that relying entirely on the drive component control program requires high precision in the equipment itself. During debugging, the difference between the two end faces of the synchronous operation mechanism needs to be measured and written into the program. This process is cumbersome and time-consuming. If the program is disordered, it will lead to different motor output torques, causing overload, or causing the fixture to tilt, damaging the mechanical structure, etc.

[0094] This application innovatively achieves synchronous operation of dual electric cylinders by combining external sensor assistance with program control of the drive components. Simultaneously, the use of sensors reduces tolerances in machined parts, assembly errors, and the time required for quality control and debugging, lowers the risk of manual intervention, and ensures the equipment is operational immediately upon launch.

[0095] In some embodiments, such as Figure 12 As shown, the formation apparatus 100 further includes an output detection element 70 disposed at multiple drive ends, wherein each pressurized drive element 31 is provided with at least one output detection element 70 to detect the output quantity of the pressurized drive element 31. The pressurized drive elements 31 at multiple drive ends are electrically connected to the detection results of the output detection elements 70 to drive synchronously according to the detection results.

[0096] Thus, a closed loop is formed by the output detection element 70 and the pressurization module 3. During debugging, precision errors caused by machining and assembly can be disregarded (sensors are independently controlled), reducing manual calibration time and improving the synchronous drive control efficiency of the pressurization drive element 31.

[0097] In some alternative embodiments, such as Figure 9 As shown, the output detection element 70 includes a displacement detection element 71, which can determine whether each pressure driving element 31 outputs synchronously by measuring the pushing distance of the pressure module 3 to the adjacent clamps 5.

[0098] In some alternative embodiments, such as Figure 9 As shown, the output detection element 70 includes a pressure detection element 72, which can determine whether each pressure driving element 31 outputs synchronously by applying the pushing pressure of the pressurization module 3 to the adjacent clamp 5.

[0099] In other embodiments, the output detection element 70 includes both a displacement detection element 71 and a pressure detection element 72. Dual detection can improve detection accuracy, reduce errors, and reduce misjudgments.

[0100] The following description, with reference to the accompanying drawings, describes an output synchronization method for multiple drive terminals of a formation apparatus according to an embodiment of the present invention, applied to the formation apparatus 100 described above.

[0101] The output synchronization method for multiple drivers includes the following steps: The output of each pressure drive 31 at the multi-drive end is detected. By comparing the output of two pressure drive 31s, the operating state of the pressure drive 31 is adjusted so that the two pressure drive 31s can output synchronously.

[0102] Specifically, when the difference between the output of any two pressurizing drive units 31 exceeds the set range, the current output rate of the pressurizing drive unit 31 is adjusted so that the current output rate of the pressurizing drive unit 31 with the smaller output is greater than the current output rate of the pressurizing drive unit 31 with the larger output. When the difference between the outputs of any two pressurizing drive units 31 is within a set range, the current output rates of the two pressurizing drive units 31 are kept equal.

[0103] For ease of understanding, Figure 9 In the example shown, there are two pressure driving units 31 distributed on the left and right. The output shafts 311 of the two pressure driving units 31 respectively push the adjacent clamps 5 to move backward to clamp the battery cell 200. This will be explained in detail below.

[0104] In some specific embodiments, the output of the pressure drive 31 can be detected by the displacement detection element 71. For example, there can be two displacement detection elements 71 distributed on the left and right sides, which can detect the movement distance of the adjacent clamps 5 at their left and right ends. When the output shaft 311 of the pressure drive 31 starts to move backward, the two displacement detection elements 71 can detect the movement distance of the adjacent clamps 5 at their left and right ends respectively. When the left end of the clamp 5 moves a greater distance, the pressure drive 31 at the left end can be slowed down or stopped, or the pressure drive 31 at the right end can be sped up. Until the movement distances at the left and right ends of the clamp 5 are measured to be equal, the two pressure drive elements 31 can be adjusted to the same speed, thus ensuring that the two pressure drive elements 31 operate synchronously thereafter.

[0105] In some specific embodiments, the output of the pressure drive 31 can be detected by the pressure detection element 72. For example, there can be two pressure detection elements 72 distributed on the left and right sides. The two pressure detection elements 72 can detect the pressure between the output shaft 311 and the adjacent clamp 5, or detect the pressure on a certain battery cell 200. When the output shaft 311 of the pressure drive 31 begins to move backward, the pressure on the clamp 5 or the battery cell 200 at the left and right ends can be detected by the two pressure detection elements 72 respectively. Taking the clamp 5 as an example, when the pressure on the left end of the clamp 5 is greater, the pressure drive 31 at the left end can be slowed down or stopped, or the pressure drive 31 at the right end can be sped up. Until the pressure on the left and right ends of the clamp 5 is measured to be equal, the two pressure drive elements 31 can be adjusted to the same speed, and then the two pressure drive elements 31 can be ensured to operate synchronously.

[0106] Specifically, such as Figure 12As shown, the output shaft 311 of the pressurization module 3 transmits pressure to the fixture 5 through the pressure plate 32. Therefore, the output detection element 70 can detect the difference in output of multiple pressurization drive elements 31 on the pressure plate 32 to provide feedback on the difference in output of the fixture 5. As a result, output detection is easier.

[0107] For ease of understanding, please refer to Figures 1-12 The following describes the usage steps of the formation device 100 in a specific embodiment. In this specific embodiment, 41 clamps 5 are arranged in the front-to-back direction for clamping 40 battery cells 200. Guide rods 21 extend in the front-to-back direction on the frame module 2, and a pressurizing module 3 is arranged at the front end of the frame module 2. The pressurizing module 3 includes two pressurizing drive members 31 arranged in the left-to-right direction. The pressurizing module 3 includes a pressure plate 31 sleeved on the guide rods 21, and the output shafts 311 of the two pressurizing drive members 31 are connected to the pressure plate 31.

[0108] The use of the chemical formation equipment 100 includes multiple stages, specifically the initial stage, the feeding stage, the operation stage, the heating stage, the charging and discharging stage, and the termination stage.

[0109] 1. In the initial stage, the dual-pressure drive unit 31 drives the pressure plate 32 to a retracted state. Specifically, the dual-pressure drive unit 31 drives the pressure plate 32 to move forward, the pressure plate 32 drives the chain connecting plate 35 to move forward, and the chain connecting plate 35 pulls the chain 4 to straighten and flatten it. The chain 4 engages with the connecting pins 502 on multiple clamps 5 through multiple chain holes, causing the 41 sets of clamps 5 to be in a restrained open state. The distance between adjacent clamps 5 is increased, facilitating material unloading.

[0110] 2. During the unloading phase, the robotic arm picks up 40 battery cells 200 and unloads them. Each battery cell 200 is placed on the insulating film 55 between two adjacent grippers 5. At this time, the battery cell 200 does not contact the grippers 5 on both sides. This unloading phase can also be called the restraint opening phase.

[0111] 3. During operation, the dual pressure drive 31 extends to overcome the friction between the pressure assembly 3 and the clamps 5, and the output shaft 311 moves backward at a maximum speed of 30 mm / s. This process is no-load operation, and the pressure drive 31 has not yet applied pressure to the clamps 5. At this time, the reading of the pressure detection element 71 is negligible.

[0112] When the 41 clamps 5 come into contact with the surface of the battery cell 200, this is the restraint and compression state. At this point, the reading of the pressure detection element 71 increases instantaneously, and the output shaft 311 moves backward at a maximum speed of 0.2 mm / s.

[0113] When the pressure sensor 71 reaches the process pressure, the dual pressurization drive 31 stops operating and enters the pressure holding stage. This process is full-load operation.

[0114] Because the formation process takes too long, the expansion of the battery cell 200 will continuously cause pressure changes. At this time, the pressure detection device 71 is used to monitor and continuously adjust the output distance of the dual pressure drive device 31 to meet the ±0.2Mpa range.

[0115] 4. During the heating stage, after the dual-pressure drive unit 31 enters the pressure holding stage, the fixture 5 activates the heating function. The heating film 51 converts heat by increasing its own power. When the process temperature is reached, the heating film 51 reduces its power and monitors the real-time temperature value through the temperature sensor 54. The power of the heating film 51 is adjusted as needed to meet the ±3℃ range. The generated heat is transferred to the surface of the battery cell 200 through the surface of the aluminum plate.

[0116] 5. During the charging and discharging phase, after the surface temperature of the battery cell 200 reaches the process temperature, charging and discharging will begin 2 hours later (this time is to ensure that both the internal and external temperatures of the battery cell 200 reach the process temperature). After the battery cell 200 is constrained and pressurized, the charging and discharging circuit board 57 and the elastic pressure plate 56 press the battery cell 200 lead sheet together through the spring force. During the formation process, the charging and discharging contacts continuously perform current and voltage charging and discharging functions, while the detection contacts monitor the current and voltage accuracy values ​​in real time. When the range is controlled within ±0.05%FS, the system operates normally; if it exceeds this range, the charging and discharging channel will automatically disconnect.

[0117] 6. In the final stage, after the formation process is completed, the double pressure drive 31 drives the pressure plate 32 to retract. The clamp 5, through the chain connecting plate 35, chain 4, and connecting pin 502, is driven by the double pressure drive 31 to achieve the restraint opening state.

[0118] During the aforementioned pressurization stage, when the two pressurizing drive units 31 apply pressure to the pressure plate 32, the output synchronization method of the multi-drive end described in this application can be used to maintain the synchronous operation of the two pressurizing drive units 31 during the pressurization stage by using the control closed loop of the output detection unit 70 and the pressurizing drive unit 31, thereby maintaining the uniformity of the pressure distribution on the left and right sides of the clamp 5.

[0119] Specifically, the output shafts 311 of the two pressure-applying drive units 31 are configured as a driving shaft and a driven shaft, respectively. The pressure-applying drive unit 31 of the driving shaft unit includes a servo driver, a servo motor, and an internal encoder forming a control loop. The pressure-applying drive unit 31 of the driven shaft unit includes another servo driver, another servo motor, and another internal encoder forming a control loop.

[0120] The pressurization module 3 includes a correction unit that synchronously controls the two pressurization drive units 31, namely an output detection unit 70 that performs output detection, which may include at least one of a displacement detection unit 71 and a pressure detection unit 72.

[0121] The following description, with reference to the accompanying drawings, describes a method for determining the output synchronization of a multi-drive terminal of a formation device according to an embodiment of the present invention, which is applied to the formation device 100 described above, and specifically applied during the above-described operation phase.

[0122] The output synchronization determination method uses an output detection element 70 including at least four displacement detection elements 71. Each displacement detection element 71 is used to detect the position of a corresponding point on the pressure plate 32 in order to measure the output of the pressure driving element 31.

[0123] In this configuration, any three position points form a triangular plane, and at least four triangular planes are formed on the pressure plate 32. When at least N triangular planes meet the set conditions, it is determined that the output of the multi-drive end pressure drive 31 is equal, where N is a natural number greater than or equal to 2.

[0124] In other words, when the output of the pressure drive unit 31 at the multiple drive ends is equal, at least four position points on the pressure plate 32 are located on the same plane, that is, all triangular planes are on the same plane. Once the triangular planes on the pressure plate 32 are no longer parallel to each other, it can be determined that the pressure plate 32 has tilted to a certain extent, and at this time, the pressure drive unit 31 at the multiple drive ends needs to be adjusted.

[0125] Thus, by using multiple displacement detection elements 71 for detection, and in conjunction with the control of the pressurization module 3, the more displacement detection elements 71 there are, the more triangular planes can be established, and the more accurate the synchronization of the pressurization drive element 31 can be measured.

[0126] Specifically, such as Figure 9 As shown, a displacement detection element 71 is provided on the support plate 22 of the frame module 2, such as... Figure 10 As shown, the pressure plate 32 is provided with a position sensing part 307 corresponding to the position detection element 71. The displacement detection element 71 determines the position of the position sensing part 307 by detecting the distance between itself and the position sensing part 307. Each position sensing part 307 constitutes a position point.

[0127] Specifically, the four position sensing units 307 constitute four position points, namely points A, B, C, and D. For example... Figure 15 As shown, the four points can form four triangular planes, namely plane ABC, plane ACD, plane ABD and plane BCD.

[0128] In some specific embodiments, the condition is set as follows: the included angle between at least N triangular planes is less than or equal to a set angle. This reduces the amount of computation.

[0129] For example, in some solutions, N is 2, and the angle is set to 1 degree. That is, after detection by multiple displacement detection elements 71, it is determined that the included angle between at least two triangular planes is less than or equal to 1 degree, and it can be judged that multiple position points are roughly located on the same plane. At this time, during the clamping operation phase, it can be determined that the output of all pressure driving elements 31 at the multi-drive end is synchronized, and subsequently, all pressure driving elements 31 can be adjusted to output at the same speed.

[0130] For example, in some solutions, N is 4, and the angle is set to 0.5 degrees. That is, after detection by multiple displacement detection devices 71, at least four triangular planes are identified, and the included angle between any two triangular planes is less than or equal to 0.5 degrees. It can be determined that multiple position points are roughly located on the same plane. At this time, during the clamping operation phase, it can be determined that the output of all pressure driving devices 31 at the multi-drive end is synchronized, and subsequently, all pressure driving devices 31 can be adjusted to output at the same speed.

[0131] The comparison of the different schemes above shows that the judgment method of this application, when setting the setting conditions, the more N is set, the smaller the setting angle is, the higher the judgment requirements are, and the more precise the adjustment of all pressure driving components 31 is.

[0132] In some other specific embodiments, the determination can also be made by the normal line of the triangular plane.

[0133] Specifically, the three endpoints of each triangular plane are the first endpoint, the second endpoint, and the third endpoint, respectively. The vector from the first endpoint to the second endpoint is the first vector, and the vector from the first endpoint to the third endpoint is the second vector. The vector product of the first vector and the second vector is the normal line of the triangular plane.

[0134] In this embodiment, the condition for determining that the output of the multi-drive end pressure drive 31 is equal is that at least N normal lines are parallel.

[0135] Still with Figure 15 and Figure 16 Taking the illustrated scheme as an example, the four position sensing units 307 constitute four position points, namely points A, B, C, and D. These form four triangular planes, namely plane ABC, plane ACD, plane ABD, and plane BCD.

[0136] On plane ABC, the first endpoint is A, the second endpoint is B, and the third endpoint is C. This yields the first vector. The second vector The vector product of the two yields the normal to plane ABC: .

[0137] Similarly, the normals of plane ACD: Normal to the ABD plane: Normals of the BCD plane: .

[0138] By measuring the number of parallel normal lines, it can be determined that the output of the multi-drive pressure drive unit 31 is equal. In this determination method of the present application, the more N is set when setting the conditions, the higher the judgment requirement and the more precise the adjustment of all pressure drive units 31.

[0139] In practical applications, due to the influence of various cumulative errors, the normal vector lines are not parallel. By simultaneously correcting the normal vector plane, the resulting normal vector lines are made parallel, ensuring synchronous operation of the two axes. The decoupling and coupling operations of the electric cylinder are the same as in Method 1.

[0140] In summary, the present application solution utilizes the displacement detection element 71 to form multiple usage modes, and achieves synchronous control of the output of the multi-drive pressure drive element 31 through multiple methods.

[0141] Taking some specific embodiments as examples, refer to Figure 1 The formation equipment 100 includes a frame module 1, a frame module 2, a chain 4, a fixture 5 for battery formation, a pressurization module 3, and an output testing component 70.

[0142] The rack module 1 is a large frame structure installed on the ground, and the frame module 2 is a small frame structure installed on the rack module. The frame module 2 includes two support plates 22 distributed front and back, four support rods 23 connected between the two support plates 22, and four guide rods 21 extending in the front and back direction. Each guide rod 21 is connected to the two support plates 22 at both ends, and the four guide rods 21 are all parallel.

[0143] The pressurizing module 3 is installed on the front side of the frame module, and two electric cylinders distributed on the left and right sides are set as pressurizing drive components 31. The pressurizing module 3 also includes a pressure plate 32 sleeved on the guide rod 21. The pressure plate 32 has a second sleeve hole 303 and is fitted with a sliding sleeve 34. A chain connecting plate 35 is provided on the pressure plate 32, and a position sensing part 307 is provided near the second sleeve hole 303. The pressure plate 32 is hung on the output shaft 311 by a hook 36, and the position sensing part 307 is located between the second sleeve hole 303 and the output shaft 311.

[0144] One end of chain 4 is a movable end, connected to the chain connecting plate 35 on the pressure plate 32. The other end of chain 4 is a fixed end, connected to another support plate 22 of the frame module 2.

[0145] The fixture 5 is a three-layer structure consisting of a polyimide heating film in the middle and aluminum plates on both sides. The aluminum plates and the polyimide heating film are connected by a thermally conductive silicone grease layer 53. The fixture 5 has a first set of holes 501 through which the guide rod 21 is fitted, and a bushing 59 is installed at the first set of holes 501. An elastic pressure plate 56 is provided on one side of the fixture 5 in the thickness direction, and a charging / discharging circuit board 57 is provided on the other side. The elastic pressure plate 56 and the charging / discharging circuit board 57 are correspondingly arranged.

[0146] An insulating film 55 connects two adjacent clamps 5. Temperature sensors 54 are also provided on the clamps 5. Multiple temperature sensors 54 are arranged on the polyimide heating film and the aluminum plate, respectively.

[0147] The output detection element 70 includes both a displacement detection element 71 and a pressure detection element 72. The displacement detection element 71 is mounted on the support plate 22 of the frame module 2, and a position sensing part 307 corresponding to the position detection element 71 is mounted on the pressure plate 32. The displacement detection element 71 determines the position of the position sensing part 307 by detecting the distance between itself and the position sensing part 307. The pressure detection element 72 is tubular and is fitted onto the output shaft 311 of the electric cylinder. The pressure plate 32 is hung on the pressure detection element 72 by a hook 36.

[0148] During system operation, the main controller issues commands, simultaneously sending run commands to the drive axis servo driver and the driven axis servo driver to drive the motors. Four displacement sensors 71 are arranged in a rectangular array. These four displacement sensors 71 can synchronously construct a plane and feed back their current position signals to the main controller for comparison. The corrected displacement is then fed back to the driven axis servo driver, modifying its rotational speed, thereby coupling the drive axis and driven axis and adjusting their synchronous operation.

[0149] One method for synchronously applying pressure to the dual-pressure drive unit 31 using multiple displacement detection elements 71 involves arranging two displacement detection elements 71 on each side of the output shaft 311 of the dual-pressure drive unit 31 within a certain range. Every three displacement detection elements 71 can be defined as a group of planes. Figure 15 As shown, a dual electric cylinder is configured, with one shaft as the drive shaft and the other as the driven shaft. First, a set range is established in the program for calibration and comparison. Second, during the initial operation of the dual-pressure drive unit 31 (this process is decoupling), the flatness of the formed plane is continuously compared with the set range in the program, and the travel displacement is corrected in a timely manner. When the flatness error approaches "zero" from the set range, the drive shaft operates at a fixed speed, and the driven shaft follows the drive shaft (this process is coupling), thus ensuring synchronous operation of the two shafts. This process uses a single plane for calibration, resulting in a relatively small computational load.

[0150] Another method for achieving synchronous pressure application of the dual-pressure drive unit 31 using multiple displacement detection elements 71 is as follows: Four sets of planes can be compared simultaneously. When the flatness of the four sets of planes simultaneously approaches zero, the drive shaft operates at a fixed speed, and the driven shaft follows the drive shaft (this process is coupling), thus ensuring synchronous operation of the two shafts. This process uses four planes for correction, but the algorithm computation is relatively large. All of the above can be flexibly applied.

[0151] Another approach is to control dual-axis synchronization by calculating the plane normal vector formed by the sensors.

[0152] Other components of the formation apparatus 100 according to embodiments of the present invention, such as motors and their operation, are known to those skilled in the art and will not be described in detail here.

[0153] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0154] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A clamp for battery formation, characterized in that, include: Heating film; Two rigid heat-conducting plates are disposed on opposite sides of the heating film.

2. The fixture for battery formation according to claim 1, characterized in that, Also includes: A thermally conductive silicone grease layer is sandwiched between at least one of the rigid thermally conductive plates and the heating film; the heating film is a polyimide heating film, and the rigid thermally conductive plate is an aluminum plate.

3. The fixture for battery formation according to any one of claims 1-2, characterized in that, The clamp has a charging and discharging circuit board on one side in the thickness direction, and an elastic pressure plate on the corresponding position on the other side.

4. The fixture for battery formation according to claim 3, characterized in that, The clamp also includes a spring body connected between the rigid heat-conducting plate and the elastic pressure plate; At least two of the spring bodies have different diameters and different lengths, with the larger diameter spring body fitted over the smaller diameter spring body.

5. A battery formation apparatus, characterized in that, include: Frame module, the frame module including guide rod; According to any one of claims 1-4, the clamp for battery formation is of at least two and slidably fitted onto the guide rod, and the battery cell is adapted to be clamped between two adjacent clamps; A pressurizing module is disposed on the frame module and located at at least one end along the length of the guide rod. The pressurizing module presses against the adjacent clamp and pushes the clamp to press the battery cell.

6. The battery formation apparatus according to claim 5, characterized in that, The pressurization module includes at least two pressurization drive members, each pressurization drive member having an output shaft movable along the length direction of the guide rod, the output shaft being used to press against an adjacent clamp; At least two of the pressure-applying drive elements are located at the same end along the length of the guide rod, or the pressure-applying drive elements are provided at both ends along the length of the guide rod.

7. The battery formation apparatus according to claim 6, characterized in that, The frame module is provided with at least two of the pressurizing driving components, one end of which is a multi-driving end; The formation equipment further includes: an output detection element provided at the multiple driving ends, wherein each of the pressurizing driving elements is provided with at least one of the output detection elements to detect the output amount of the pressurizing driving element; The pressurizing drive unit of the multi-drive end is electrically connected to the detection result of the output detection unit so as to drive synchronously according to the detection result; The output detection element includes at least one of a displacement detection element and a pressure detection element.

8. A method for synchronizing the output of multiple drive terminals in a formation device, applied to the formation device for a battery according to claim 7, characterized in that, Includes the following steps: Detect the output of each of the pressurized drive components at the multi-drive end; When the difference between the outputs of any two pressurizing actuators exceeds a set range, the current output rate of the pressurizing actuator is adjusted so that the current output rate of the pressurizing actuator with the smaller output is greater than the current output rate of the pressurizing actuator with the larger output. When the difference between the outputs of any two pressurizing actuators is within the set range, the current output rates of the two pressurizing actuators are kept equal.

9. A method for determining the output synchronization of multiple drive terminals in a formation device, applied to the formation device of the battery according to claim 7, characterized in that, The pressurization module also includes: A pressure plate is slidably fitted onto the guide rod, and the pressure plate is located at at least one end of the guide rod along its length. The output shaft of the pressure drive is connected to the pressure plate to press the clamp. The output detection device includes at least four displacement detection devices, each of which is used to detect the position of a corresponding point on the pressure plate in order to measure the output of the pressure driving device. Any three of the aforementioned locations form a triangular plane, and the pressure plate forms at least four of the aforementioned triangular planes; When at least N of the triangular planes meet the set conditions, it is determined that the output of the pressurized driving device of the multi-drive end is equal, where N is a natural number greater than or equal to 2.

10. The method for determining the output synchronization of a multi-drive terminal of a formation device according to claim 9, characterized in that, The setting condition is: the included angle between at least N of the triangular planes is less than or equal to a set angle; Alternatively, the setting conditions are as follows: the three endpoints of each triangular plane are a first endpoint, a second endpoint, and a third endpoint, the vector from the first endpoint to the second endpoint is a first vector, the vector from the first endpoint to the third endpoint is a second vector, the vector product of the first vector and the second vector is the normal line of the triangular plane, and at least N normal lines are parallel.

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