Flattening device and battery manufacturing equipment
By using electromagnetic induction technology to flatten the battery tabs, the problem of metal shavings generated during the flattening process is solved, improving battery performance and device stability while reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-03
- Publication Date
- 2026-03-27
AI Technical Summary
During the manufacturing process of battery cells, metal shavings are easily generated when flattening the tabs, which leads to a decrease in battery performance.
Using electromagnetic induction technology, an electromagnetic coil is electrically connected to an electromagnetic pulse generator. Electromagnetic force is used to flatten the tabs, avoiding friction and high-frequency vibration, and reducing the generation of metal shavings.
It effectively reduces the generation of metal shavings, improves battery performance and yield, and reduces device wear and maintenance costs.
Smart Images
Figure CN224053350U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of battery manufacturing, in particular to a kneading device and a battery manufacturing device. BACKGROUND
[0002] At present, the manufacturing process of many workpieces includes a kneading process to perform a kneading operation on one or more parts of the workpiece. Taking a battery cell as an example, in the manufacturing process of the battery cell, a kneading device is used to perform a kneading operation on the tab of the battery cell so as to facilitate subsequent welding of the tab. However, a large amount of metal chips is generated in the process of performing the kneading operation on the tab, and the metal chips entering the interior of the battery cell will cause the performance of the battery cell to decrease. CONTENT OF THE UTILITY MODEL
[0003] One of the purposes of the embodiments of the present application is to provide a kneading device and a battery manufacturing device, aiming to solve the technical problem that metal chips are easily generated in the process of performing a kneading operation on a workpiece by a kneading device in the related art.
[0004] To solve the above technical problem, the technical solution adopted by the embodiments of the present application is as follows:
[0005] In a first aspect, a kneading device is provided, which includes a kneading assembly, the kneading assembly including a kneading piece and an electromagnetic pulse generator, the kneading piece being arranged opposite to a part to be kneaded of a workpiece along a preset direction, the kneading piece including an electromagnetic coil, the electromagnetic coil being electrically connected to the electromagnetic pulse generator, so that the part to be kneaded is subjected to a kneading force.
[0006] The kneading device provided by the embodiments of the present application has the beneficial effects that the kneading device provided by the embodiments of the present application is electrically connected to the electromagnetic pulse generator through the electromagnetic coil, the electromagnetic pulse generator provides current to the electromagnetic coil, so that two mutually repulsive electromagnetic forces are generated between the kneading piece and the part to be kneaded of the workpiece, the part to be kneaded of the workpiece is kneaded under the action of the two mutually repulsive electromagnetic forces, and the part to be kneaded is subjected to the kneading force. In this way, the kneading piece can only knead the part to be kneaded of the workpiece under the action of the electromagnetic force, and no frictional action is generated between the kneading piece and the part to be kneaded of the workpiece, nor does the part to be kneaded of the workpiece generate high-frequency vibration, effectively reducing the metal chips generated in the kneading operation process, thereby effectively reducing the adverse effects of the metal chips on the performance of the workpiece.
[0007] In some embodiments of the present application, the kneading assembly further includes a rotary driver, the rotary driver being configured to drive the kneading piece to perform a rotary motion in a plane perpendicular to the preset direction.
[0008] By adopting the technical scheme, since the flattening piece continuously rotates, the electromagnetic force borne by the part to be flattened of the workpiece becomes more uniform in the circumferential direction around the rotation axis of the flattening piece, thereby effectively improving the flattening effect of the flattening device.
[0009] In some embodiments of the present application, the flattening piece and the part to be flattened of the workpiece are arranged apart along the preset direction.
[0010] By adopting the technical scheme, the mutual friction between the flattening piece and the part to be flattened of the workpiece during rotation can be improved, thereby effectively reducing the adverse effects of metal chips on the performance of the workpiece.
[0011] In some embodiments of the present application, the flattening device further comprises a feeding mechanism and a fixing assembly, the fixing assembly is used to fix the workpiece, and the feeding mechanism is used to drive the flattening assembly and the fixing assembly to move towards each other along the preset direction.
[0012] By adopting the technical scheme, under the driving action of the feeding mechanism, the flattening piece gradually approaches the part to be flattened of the workpiece, and in this process, the electromagnetic force borne by the part to be flattened of the workpiece gradually increases, so that the part to be flattened of the workpiece gradually deforms under force until the part to be flattened of the workpiece is completely flattened, thereby effectively improving the situation that the part to be flattened of the workpiece is damaged due to the electromagnetic force being too large at an instant, and effectively improving the yield rate of the workpiece.
[0013] In some embodiments of the present application, the flattening device further comprises a base, the flattening assembly and the fixing assembly are installed on the base, and the flattening assembly and / or the fixing assembly can move along the preset direction.
[0014] By adopting the technical scheme, the integrity of the flattening device is effectively improved, so that the flattening device can be carried.
[0015] In some embodiments of the present application, the base is provided with a sliding rail, and the flattening assembly and / or the fixing assembly are slidably installed on the sliding rail.
[0016] By adopting the technical scheme, the relative movement track of the flattening assembly and the fixing assembly is effectively limited, and the situation that the relative position of the flattening assembly and the fixing assembly deviates during movement is improved, thereby effectively improving the working stability of the flattening device.
[0017] In some embodiments of the present application, the flattening assembly further comprises a limiting sleeve ring, and the limiting sleeve ring is sleeved on the part to be flattened of the workpiece.
[0018] By adopting the technical scheme, the situation that the part to be flattened of the workpiece is everted during the flattening operation of the part to be flattened of the workpiece is effectively improved, thereby further improving the flattening effect of the flattening device.
[0019] In some embodiments of the present application, the limiting sleeve ring is connected to one side of the flattening member close to the workpiece.
[0020] By adopting the above technical solutions, when the flattening operation is performed on the flattening part of the workpiece, the flattening part of the workpiece can be directly inserted into the limiting sleeve ring, without the need to fix the limiting sleeve ring after the limiting sleeve ring is sleeved on the flattening part of the workpiece. This not only simplifies the operation process of the flattening device and improves the working efficiency of the flattening device, but also makes the structure of the flattening device more compact and reduces the volume of the flattening device.
[0021] In some embodiments of the present application, the flattening member is detachably arranged.
[0022] By adopting the above technical solutions, the flattening member can be replaced according to the shape and size of the flattening part of the workpiece, thereby effectively improving the versatility of the flattening device.
[0023] In some embodiments of the present application, the flattening member further comprises an outer cover, and the electromagnetic coil is arranged in the outer cover.
[0024] By adopting the above technical solutions, the electromagnetic coil is effectively protected, thereby reducing the adverse effects of external factors such as dust and water vapor on the electromagnetic coil, and effectively improving the working stability of the flattening device.
[0025] In some embodiments of the present application, the electromagnetic pulse generator has an electromagnetic pulse output circuit electrically connected to the electromagnetic coil, and the electromagnetic pulse output circuit is provided with a power adjusting element.
[0026] By adopting the above technical solutions, the output power of the electromagnetic pulse generator can be adjusted to adapt to different types of workpieces, thereby effectively improving the versatility of the flattening device.
[0027] In some embodiments of the present application, the electromagnetic pulse generator further comprises a shell, the electromagnetic pulse output circuit is arranged in the shell, and the outer wall of the shell is provided with a power adjusting control element, and the power adjusting control element is connected to the power adjusting element.
[0028] By adopting the above technical solutions, the power of the electromagnetic pulse generator can be conveniently adjusted.
[0029] In a second aspect, a battery manufacturing equipment is provided, which comprises the flattening device of any one of the above embodiments.
[0030] The battery manufacturing device provided by the embodiments of the present application has the beneficial effect that the battery manufacturing device provided by the embodiments of the present application effectively reduces the metal scraps generated in the process of performing the flattening operation on the tab of the battery monomer, thereby effectively improving the performance of the battery. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0032] Figure 1 is a structural schematic diagram of a battery monomer provided by the embodiments of the present application;
[0033] Figure 2 is a structural schematic diagram of a flattening device in a use state provided by the embodiments of the present application;
[0034] Figure 3 is a connection structure schematic diagram of a flattening piece and a limiting collar provided by the embodiments of the present application;
[0035] Figure 4 is a circuit structure schematic diagram of an electromagnetic pulse generator and a flattening piece provided by the embodiments of the present application;
[0036] Figure 5 is a structural schematic diagram of a feeding mechanism and a fixing assembly in a use state provided by the embodiments of the present application.
[0037] In the drawings, various reference signs represent:
[0038] 100, flattening assembly; 110, flattening piece; 111, electromagnetic coil; 112, outer cover; 120, electromagnetic pulse generator; 121, power supply; 122, capacitor; 123, first switch; 124, second switch; 125, power adjusting element; 130, rotary driver; 140, limiting collar;
[0039] 200, fixing assembly; 210, first clamping piece; 220, second clamping piece;
[0040] 300, feeding mechanism; 310, driving motor; 320, transmission belt; 330, driving wheel; 340, driven wheel;
[0041] 400, base; 410, sliding rail;
[0042] 500, battery monomer; 510, shell; 520, end cover; 530, electrode assembly; 531, tab. DETAILED DESCRIPTION
[0043] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.
[0044] It should be noted that when a component is referred to as being "fixed to" or "set to" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0045] The battery cell is the smallest electrical energy storage unit including a shell, an end cover, an electrode assembly, a current collecting member and the like. In the manufacturing process of the battery cell, it is usually necessary to use a rubbing device to rub the tab of the electrode assembly for subsequent welding of the tab.
[0046] The present inventors have noticed that the rubbing methods of the conventional rubbing device mainly have the following two kinds: one rubbing method is to drive the rubbing piece to move so that the rubbing piece and the tab of the electrode assembly are extruded with each other, and the tab of the electrode assembly is gradually rubbed under the extrusion of the rubbing piece, so as to realize the rubbing operation of the tab of the electrode assembly. However, since the above method needs the rubbing piece and the tab of the electrode assembly to rub with each other, a large amount of metal chips will be generated in the rubbing process of the tab. Another rubbing method is an ultrasonic rubbing method, that is, ultrasonic waves are transmitted to the tab of the electrode assembly, and the tab is gradually rubbed under the high-frequency vibration of the ultrasonic waves. However, since the tab will generate high-frequency vibration synchronously with the ultrasonic waves, the edge of the tab will be damaged to generate metal chips. As can be seen, the above two rubbing methods will both cause the generation of metal chips in the rubbing process of the tab, and the metal chips entering the inside of the battery cell will cause the performance of the battery cell to decrease.
[0047] In order to reduce the metal scraps generated by the lug in the flattening process, the inventor designs a flattening device through in-depth research. The flattening device adopts electromagnetic induction technology to perform flattening operation on the lug of the electrode assembly. Specifically, the electromagnetic coil of the flattening piece is electrically connected with the electromagnetic pulse generator, the electromagnetic pulse generator provides current to the electromagnetic coil to make the electromagnetic coil generate an electromagnetic field, the electromagnetic field acts on the lug of the electrode assembly, so that the lug of the electrode assembly generates eddy current, and then the lug of the electrode assembly also generates an electromagnetic field. The polarity of the electromagnetic field generated by the electromagnetic coil on the side close to the electrode assembly is the same as the polarity of the electromagnetic field generated by the lug of the electrode assembly on the side close to the flattening piece, so that two electromagnetic forces repelling each other are generated between the flattening piece and the lug of the electrode assembly. Under the action of the two electromagnetic forces repelling each other, the lug of the electrode assembly is flattened, that is, the lug of the electrode assembly is subjected to the flattening force. In this way, the flattening piece can flatten the lug of the electrode assembly under the action of the electromagnetic force, and the flattening piece and the lug of the electrode assembly will not produce mutual friction effect, nor will the lug of the electrode assembly produce high-frequency vibration. The metal scraps generated during the flattening operation are effectively reduced, thereby effectively reducing the adverse effects of metal scraps on the performance of the battery monomer.
[0048] The first aspect of the embodiment of the present application provides a flattening device which can be applied to a battery manufacturing equipment to perform flattening operation on the lug of the electrode assembly. Of course, the flattening device can also be applied to the manufacturing equipment of other workpieces, for example, the flattening device is applied to the pipe manufacturing equipment to perform flattening operation on the end face of the pipe; for another example, the flattening device is applied to the metal can manufacturing equipment to perform flattening operation on the end face of the metal can; the application scenario of the flattening device is not specifically limited here.
[0049] The flattening device provided by the embodiment of the present application will be described below by taking the example that the flattening device is applied to the battery manufacturing equipment to perform flattening operation on the lug of the electrode assembly, and in combination with the drawings.
[0050] Please refer to Figure 1 , the battery monomer 500 is the smallest electric energy storage unit which includes a shell 510, an end cover 520, an electrode assembly 530, a current collecting member, an electrolyte and the like. The battery monomer 500 can be a cylindrical battery monomer, a prismatic battery monomer or a square battery monomer.
[0051] The shell 510 is a component for providing an internal environment of the battery cell 500, in which the internal environment can be used to accommodate the electrode assembly 530, the current collecting member, the electrolyte, and other components. The shell 510 can be a separate component, and an opening can be provided on the shell 510. The electrode assembly 530, the current collecting member, the electrolyte, and other components are accommodated in the internal environment by covering the opening with the end cover 520 to form the internal environment of the battery cell 500. Specifically, the shell 510 and the end cover 520 can form a common connection surface before other components are accommodated in the shell, and the end cover 520 is covered on the opening of the shell 510 when it is necessary to seal the internal environment of the shell 510. Alternatively, the shell 510 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, and the like. The material of the shell 510 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and the like, which are not specifically limited herein.
[0052] The end cover 520 refers to a component that is covered on the opening of the shell 510 to isolate the internal environment of the battery cell 500 from the external environment. The shape of the end cover 520 can be adapted to the shape of the shell 510 to fit the shell 510. In some embodiments, the end cover 520 can be made of a material having a certain hardness and strength, so that the end cover 520 is not easily deformed when subjected to extrusion and impact, so that the battery cell 500 can have higher structural strength, and the safety performance can also be improved. Of course, the material of the end cover 520 is not uniquely limited in the present embodiment, and the material of the end cover 520 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like, which are not specifically limited herein. In some embodiments, the end cover 520 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 500 when the internal pressure or temperature of the battery cell 500 reaches a threshold value. In some embodiments, an insulating partition can also be provided on the inner side of the end cover 520, which can be used to isolate the electrical connection components in the shell 510 from the end cover 520 to reduce the risk of short circuit. Alternatively, the material of the insulating partition can be, but is not limited to, plastic, rubber, and the like, which are not specifically limited herein.
[0053] The electrode assembly 530 is a component in which electrochemical reactions occur in the battery cell 500. The electrode assembly 530 is mainly manufactured by a winding process or a stacking process using a positive electrode sheet, a negative electrode sheet, and a separator layer. The separator is used to insulate and separate the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet having a portion of active material constitute a main part of the electrode assembly 530, and a portion of the positive electrode sheet and the negative electrode sheet not having the active material constitute the tab 531. The tab 531 of the positive electrode sheet and the tab 531 of the negative electrode sheet can be located together at one end of the main part of the electrode assembly 530 or can be located at both ends of the main part of the electrode assembly 530, respectively. In the charging and discharging process of the battery cell 500, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 531 is connected to the current collecting member to allow the current of the electrode assembly 530 to be drawn out to the outside via the current collecting member.
[0054] The electrolyte is a liquid that infiltrates the electrode assembly 530. When the battery cell 500 is charged, lithium ions are generated from the positive electrode sheet, and the lithium ions provided from the positive electrode sheet can move to the negative electrode sheet through the pores of the separator via the electrolyte and be embedded in the negative electrode active material of the negative electrode sheet. Conversely, when the battery cell 500 is discharged, the lithium ions embedded in the negative electrode active material of the negative electrode sheet are removed from the negative electrode sheet, and the lithium ions removed from the negative electrode sheet can move to the positive electrode sheet through the pores of the separator via the electrolyte and be embedded in the positive electrode active material of the positive electrode sheet.
[0055] The current collecting member is an electrically conductive connection medium between the case 510 and the electrode assembly 530, and the current collecting member functions to draw out the current of the electrode assembly 530 to the case 510 to achieve electrical connection between the case 510 and the electrode assembly 530. Optionally, the material of the current collecting member can be, but is not limited to, copper, iron, aluminum, steel, aluminum alloy, etc., which is not specifically limited here. Specifically, the current collecting member can be connected to the tab 531 of the electrode assembly 530 by welding to achieve electrical connection between the current collecting member and the electrode assembly 530. Before the welding process of the current collecting member and the tab 531 of the electrode assembly 530, a rubbing process of the tab 531 of the electrode assembly 530 needs to be performed using a rubbing device to make the end surface of the electrode assembly 530 flat, thereby ensuring the welding effect between the current collecting member and the tab 531 of the electrode assembly 530, and also preventing high-temperature solder from entering the inside of the electrode assembly 530 to damage the electrode assembly 530.
[0056] Please refer to Figures 2 to 4 The rubbing device described above includes a rubbing assembly 100, and the rubbing assembly 100 includes a rubbing member 110 and an electromagnetic pulse generator 120. The rubbing member 110 and the tab 531 of the electrode assembly 530 are arranged opposite to each other in a predetermined direction. The rubbing member 110 includes an electromagnetic coil 111, and the electromagnetic coil 111 is electrically connected to the electromagnetic pulse generator 120 to allow the tab 531 of the electrode assembly 530 to be subjected to a rubbing force.
[0057] The electromagnetic pulse generator 120 is a component for providing current to the electromagnetic coil 111. Specifically, referring to Figure 4 , the electromagnetic pulse generator 120 includes a power supply 121, a capacitor 122, and a first switch 123, the power supply 121, the capacitor 122, and the first switch 123 are electrically connected to form an electromagnetic pulse output circuit, the electromagnetic coil 111 is electrically connected to the electromagnetic pulse output circuit, the power supply 121 is used to charge the capacitor 122, so that the voltage of the capacitor 122 can reach a preset value, and the first switch 123 is electrically connected between the capacitor 122 and the electromagnetic coil 111 to control the conduction or disconnection of the circuit between the capacitor 122 and the electromagnetic coil 111. In some embodiments, the electromagnetic pulse generator 120 can also include a second switch 124, which is electrically connected between the power supply 121 and the capacitor 122 to control the conduction or disconnection of the circuit between the power supply 121 and the capacitor 122.
[0058] The flattening member 110 is a component for providing electromagnetic force to perform the flattening operation on the tab 531 of the electrode assembly 530. Specifically, the electromagnetic coil 111 of the flattening member 110 is electrically connected to the electromagnetic pulse output circuit of the electromagnetic pulse generator 120, and the capacitor 122 delivers current to the electromagnetic coil 111 to generate a mutually repulsive electromagnetic force between the flattening member 110 and the tab 531. The electromagnetic coil 111 can be directly electrically connected to the electromagnetic pulse output circuit of the electromagnetic pulse generator 120, or can be electrically connected to the electromagnetic pulse output circuit of the electromagnetic pulse generator 120 through a conductive component such as a wire, a conductive sheet, etc. The end face shape of the electromagnetic coil 111 close to the electrode assembly 530 can be set according to the shape of the tab 531 of the electrode assembly 530, for example, when the tab 531 of the electrode assembly 530 is in a circular ring structure, the end face shape of the electromagnetic coil 111 close to the electrode assembly 530 can be set to be circular. It can be understood that the electromagnetic coil 111 is made of a conductive material, which can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not limited here.
[0059] The preset direction can be any direction, for example Figure 2 The X direction as shown. The relative arrangement of the flattening member 110 and the tab 531 of the electrode assembly 530 in the above-mentioned preset direction means that the flattening member 110 and the battery monomer 500 are distributed in the above-mentioned preset direction, specifically, the extension direction of the helical axis of the electromagnetic coil 111 is consistent with the extension direction of the axis of the battery monomer 500, in some embodiments, the helical axis of the electromagnetic coil 111 can coincide with the axis of the battery monomer 500, of course, considering the existence of assembly tolerance, the helical axis of the electromagnetic coil 111 and the axis of the battery monomer 500 can also be slightly deviated.
[0060] The working principle of the above-mentioned flattening device is as follows:
[0061] The second switch 124 is closed, and the power supply 121 charges the capacitor 122. When the voltage of the capacitor 122 reaches a preset value, the first switch 123 is closed, and the capacitor 122 supplies current to the electromagnetic coil 111. After the current flows through the electromagnetic coil 111, the electromagnetic coil 111 generates an electromagnetic effect, thereby generating an electromagnetic field. The electromagnetic field acts on the tab 531 of the electrode assembly 530, so that the tab 531 generates an eddy current, and in turn, the tab 531 also generates an electromagnetic field. The polarity of the electromagnetic field generated by the electromagnetic coil 111 on the side close to the tab 531 is the same as the polarity of the electromagnetic field generated by the tab 531 on the side close to the electromagnetic coil 111, so that two mutually repulsive electromagnetic forces are generated between the electromagnetic coil 111 and the tab 531. Under the action of the two mutually repulsive electromagnetic forces, the tab 531 of the electrode assembly 530 is flattened, that is, the tab 531 of the electrode assembly 530 is subjected to a flattening force.
[0062] The flattening device provided by the embodiment of the present application is electrically connected to the electromagnetic coil 111 and the electromagnetic pulse generator 120. The electromagnetic pulse generator 120 provides current to the electromagnetic coil 111, so that two mutually repulsive electromagnetic forces are generated between the flattening piece 110 and the tab 531 of the electrode assembly 530. Under the action of the two mutually repulsive electromagnetic forces, the tab 531 of the electrode assembly 530 is flattened. In this way, the flattening piece 110 only needs to be subjected to the electromagnetic force to flatten the tab 531 of the electrode assembly 530. The flattening piece 110 and the tab 531 of the electrode assembly 530 will not produce mutual friction, nor will the tab 531 of the electrode assembly 530 produce high-frequency vibration. Therefore, the metal chips generated during the flattening operation are effectively reduced, thereby effectively reducing the adverse effects of the metal chips on the performance of the battery monomer 500.
[0063] In addition, since the above-mentioned flattening device generates less metal chips during the flattening operation of the tab 531 of the electrode assembly 530, it is not necessary to additionally set a dust removal device, thereby effectively reducing the manufacturing cost of the flattening device. At the same time, since the flattening piece 110 and the tab 531 of the electrode assembly 530 will not produce mutual friction, the risk of wear of the flattening piece 110 is effectively reduced, thereby effectively reducing the later maintenance cost of the flattening piece 110.
[0064] In some embodiments of the present application, please refer to Figure 2 The flattening assembly 100 further comprises a rotary driver 130 for driving the flattening piece 110 to perform a rotary motion in a plane perpendicular to the preset direction.
[0065] The rotating driver 130 is a mechanism for providing power for the rotating motion of the flattening member 110. In some embodiments, in order to facilitate the electrical connection between the electromagnetic coil 111 and the electromagnetic pulse generator 120, the flattening member 110 is connected to the electromagnetic pulse generator 120, and the power output shaft of the rotating driver 130 is connected to the electromagnetic pulse generator 120, so that when the rotating driver 130 is working, the rotating driver 130 drives the electromagnetic pulse generator 120 and the flattening member 110 to synchronously rotate. In other embodiments, the electromagnetic coil 111 can be electrically connected to the electromagnetic pulse generator 120 through a wire, and the power output shaft of the rotating driver 130 is connected to the flattening member 110, so that when the rotating driver 130 is working, the rotating driver 130 only drives the flattening member 110 to rotate. Optionally, the rotating driver 130 can be, but is not limited to, a servo motor, a stepper motor, etc., and in other embodiments, the rotating driver 130 can also be a gear and rack driving mechanism, a belt pulley driving mechanism, etc., which are not specifically limited here.
[0066] The rotating motion refers to that the flattening member 110 rotates around the power output shaft as the rotation axis, in other words, the power output shaft of the rotating driver 130 and the axis of the electrode assembly 530 both extend along the above-mentioned preset direction, and in some embodiments, the power output shaft of the rotating driver 130 and the axis of the electrode assembly 530 are coaxially arranged.
[0067] In the circumferential direction around the power output shaft of the rotating driver 130, due to the irregular shape of the electromagnetic coil 111, the electromagnetic force between the flattening member 110 and the tab 531 of the electrode assembly 530 is not uniform, thereby causing some tabs 531 to be unable to be completely flattened, and further causing the flattening effect to fail to meet the expected requirements.
[0068] By adopting the above technical solution, since the flattening member 110 continuously rotates, in the circumferential direction around the rotation axis of the flattening member 110, the electromagnetic force on the tab 531 of the electrode assembly 530 becomes more uniform, thereby effectively improving the flattening effect of the flattening device.
[0069] In some embodiments of the present application, the flattening member 110 and the tab 531 of the electrode assembly 530 are arranged at intervals along the preset direction.
[0070] It can be understood that the interval between the flattening member 110 and the tab 531 of the electrode assembly 530 can be determined according to actual application needs, for example, the interval between the flattening member 110 and the tab 531 of the electrode assembly 530 is set according to the electromagnetic force therebetween, and the interval between the flattening member 110 and the tab 531 of the electrode assembly 530 can be 1 mm, 5 mm, 10 mm, etc., which is not specifically limited here.
[0071] By adopting the above technical solution, the situation where metal shavings are generated due to the friction between the flattening part 110 and the tab 531 of the electrode assembly 530 during rotation can be improved, thereby effectively reducing the adverse effects of metal shavings on the performance of the battery cell 500.
[0072] In some embodiments of this application, please refer to Figure 2 The kneading device also includes a feeding mechanism 300 and a fixing component 200. The fixing component 200 is used to fix the battery cell 500, and the feeding mechanism 300 is used to drive the kneading component 100 and the fixing component 200 to move towards each other in a preset direction.
[0073] The feeding mechanism 300 is a mechanism that provides power for the kneading component 100 and the fixing component 200 to move toward each other in the aforementioned preset direction. Understandably, the kneading component 100 can be fixed, and the feeding mechanism 300 can drive the fixing component 200 to move away from or closer to the kneading component 100. Alternatively, the fixing component 200 can be fixed, and the feeding mechanism 300 can drive the kneading component 100 to move away from or closer to the kneading component 100. Furthermore, the feeding mechanism 300 can drive the kneading component 100 and the fixing component 200 to move synchronously, so that the kneading component 100 and the fixing component 200 move closer or further apart. Optionally, the feeding mechanism 300 can be, but is not limited to, a drive mechanism with a transmission belt 320, a ball screw drive mechanism, a rack and pinion drive mechanism, etc., and is not specifically limited here. In this embodiment, the feeding mechanism 300 is a drive mechanism with a transmission belt 320. For details, please refer to [link to relevant documentation]. Figure 5 The feeding mechanism 300 includes a drive motor 310, a transmission belt 320, a drive pulley 330, and a driven pulley 340. The transmission belt 320 is wound between the drive pulley 330 and the driven pulley 340, and extends in a preset direction. The drive pulley 330 is connected to the output shaft of the drive motor 310. The kneading assembly 100 or the fixing assembly 200 is connected to the transmission belt 320. When the drive motor 310 drives the drive pulley 330 to rotate, the transmission belt 320 rotates synchronously with the drive pulley 330, thereby driving the kneading assembly 100 or the fixing assembly 200 to move in the preset direction, so that the kneading assembly 100 and the fixing assembly 200 move closer to each other.
[0074] The fixing component 200 is a mechanism for fixing the battery cell 500. Optionally, the fixing component 200 can be, but is not limited to, a clamp, a mechanical gripper, etc., and is not specifically limited here. In this embodiment, the fixing component 200 is a clamp; for details, please refer to [link to relevant documentation]. Figure 5The fixing assembly 200 includes a first clamping piece 210 and a second clamping piece 220, and the first clamping piece 210 and the second clamping piece 220 clamp the battery monomer 500 in cooperation. The fixing assembly 200 can further include a locking bolt for connecting the first clamping piece 210 and the second clamping piece 220, and the spacing between the first clamping piece 210 and the second clamping piece 220 can be adjusted by screwing the locking bolt, for example, after the battery monomer 500 is placed between the first clamping piece 210 and the second clamping piece 220, the locking bolt is screwed to reduce the spacing between the first clamping piece 210 and the second clamping piece 220, until the first clamping piece 210 and the second clamping piece 220 clamp the battery monomer 500 together.
[0075] Since the electromagnetic force between the flattening piece 110 and the battery monomer 500 can reach the maximum value at the moment when the electromagnetic coil 111 is powered on, if the initial spacing between the flattening piece 110 and the battery monomer 500 is too small, the excessive electromagnetic force will directly act on the battery monomer 500 at the moment when the electromagnetic coil 111 is powered on, thereby causing damage to the battery monomer 500.
[0076] By adopting the above technical solution, under the driving action of the feeding mechanism 300, the flattening piece 110 gradually approaches the tab 531 of the electrode assembly 530, and in this process, the electromagnetic force acting on the tab 531 of the electrode assembly 530 gradually increases, so that the tab 531 of the electrode assembly 530 is gradually deformed under force until the tab 531 of the electrode assembly 530 is completely flattened. In this way, the situation that the excessive electromagnetic force acting on the tab 531 of the electrode assembly 530 in an instant causes damage to the battery monomer 500 can be improved, thereby effectively improving the yield of the battery monomer 500.
[0077] In some embodiments of the present application, referring to Figure 2 The flattening device further includes a base 400, and the flattening assembly 100 and the fixing assembly 200 are installed on the base 400, and the flattening assembly 100 and / or the fixing assembly 200 can move along a predetermined direction.
[0078] The base 400 refers to a component for providing installation space for the flattening assembly 100, the feeding mechanism 300, the fixing assembly 200, and other components of the flattening device. The base 400 can be a one-piece structural member, which can be in the form of a plate structure, a columnar structure, etc., without specific limitation here. Of course, in other embodiments, the base 400 can also be a combined member formed by assembling multiple components. The base 400 is made of a rigid material, which can be selected from, but not limited to, aluminum, copper, iron, steel, plastic, etc., without specific limitation here.
[0079] In some embodiments, the kneading assembly 100 is fixedly installed on the base 400, and the fixing assembly 200 is movably installed on the base 400, so that the fixing assembly 200 can move along the preset direction, and the kneading assembly 100 and the fixing assembly 200 can approach or move away from each other.
[0080] In some other embodiments, the fixing assembly 200 is fixedly installed on the base 400, and the kneading assembly 100 is movably installed on the base 400, so that the kneading assembly 100 can move along the preset direction, and the kneading assembly 100 and the fixing assembly 200 can approach or move away from each other.
[0081] In some other embodiments, the fixing assembly 200 is fixedly installed on the base 400, and the kneading assembly 100 is movably installed on the base 400, so that the kneading assembly 100 can move along the preset direction, and the kneading assembly 100 and the fixing assembly 200 can approach or move away from each other.
[0082] By using the above technical solutions, the integrity of the kneading device is effectively improved, so that the kneading device can be conveniently carried.
[0083] In some embodiments of the present application, referring to Figure 2 , the base 400 is provided with a slide rail 410, and the kneading assembly 100 and / or the fixing assembly 200 are slidably installed on the slide rail 410.
[0084] The slide rail 410 is a component for defining the relative movement trajectory between the kneading assembly 100 and the fixing assembly 200, and it can be understood that the slide rail 410 extends along the preset direction.
[0085] In some embodiments, the kneading assembly 100 is fixedly installed on the base 400, the fixing assembly 200 is slidably installed on the slide rail 410, and the fixing assembly 200 is connected with the power output end of the feeding mechanism 300, so that the feeding mechanism 300 drives the fixing assembly 200 to move towards the kneading assembly 100.
[0086] In some other embodiments, the fixing assembly 200 is fixedly installed on the base 400, the kneading assembly 100 is slidably installed on the slide rail 410, and the kneading assembly 100 is connected with the power output end of the feeding mechanism 300, so that the feeding mechanism 300 drives the kneading assembly 100 to move towards the fixing assembly 200.
[0087] In some embodiments, the flattening assembly 100 and the fixing assembly 200 are both slidably mounted on the slide rail 410, and the flattening assembly 100 and the fixing assembly 200 are both connected with the power output end of the feeding mechanism 300, and the feeding mechanism 300 simultaneously drives the flattening assembly 100 and the fixing assembly 200 to move towards each other along the preset direction, so that the flattening assembly 100 and the fixing assembly 200 are close to each other.
[0088] By adopting the above technical solution, the relative movement track of the flattening assembly 100 and the fixing assembly 200 is effectively limited, the situation that the relative position of the flattening assembly 100 and the fixing assembly 200 deviates during movement is improved, and thus the working stability of the flattening device is effectively improved.
[0089] In some embodiments of the present application, referring to Figure 3 , the flattening assembly 100 further comprises a limiting sleeve ring 140, and the limiting sleeve ring 140 is sleeved on the tab 531 of the electrode assembly 530.
[0090] The limiting sleeve ring 140 is a component for limiting the position of the tab 531 of the electrode assembly 530. Specifically, the limiting sleeve ring 140 has a limiting cavity, and the inner peripheral contour of the limiting cavity can be determined according to the shape of the tab 531 of the electrode assembly 530. For example, if the tab 531 of the electrode assembly 530 has a circular ring structure, the inner peripheral contour of the limiting cavity also has a circular ring structure. It can be understood that when the tab 531 of the electrode assembly 530 enters the limiting cavity, the tab 531 is substantially fitted with the cavity wall of the limiting cavity, thereby limiting the position of the tab 531.
[0091] By adopting the above technical solution, the situation that the tab 531 of the electrode assembly 530 is turned outward during the flattening operation of the tab 531 of the electrode assembly 530 is effectively improved, and thus the flattening effect of the flattening device is further improved.
[0092] In some embodiments of the present application, referring to Figure 3 , the limiting sleeve ring 140 is connected to the side of the flattening piece 110 close to the battery monomer 500.
[0093] The limiting sleeve ring 140 can be integrally connected with the flattening piece 110, for example, the limiting sleeve ring 140 is integrally formed with the flattening piece 110 through a casting process. The limiting sleeve ring 140 can also be connected with the flattening piece 110 in a separate manner, for example, the limiting sleeve ring 140 is connected with the flattening piece 110 through fasteners such as screws and bolts.
[0094] It should be noted that when the flattening device includes the rotary driver 130 or the feeding mechanism 300, after the tab 531 of the electrode assembly 530 is placed in the limiting cavity of the limiting sleeve ring 140, the tab 531 of the electrode assembly 530 is spaced apart from the flattening piece 110.
[0095] By adopting the technical scheme, when the tab 531 of the electrode assembly 530 is subjected to the flattening operation, the tab 531 of the electrode assembly 530 can be directly inserted into the limiting sleeve ring 140, without the need of fixing the limiting sleeve ring 140 after the limiting sleeve ring 140 is sleeved on the tab 531 of the electrode assembly 530, so that the operation process of the flattening device is simplified, the working efficiency of the flattening device is improved, and the structure of the flattening device is more compact, and the volume of the flattening device is reduced.
[0096] In some embodiments of the present application, the flattening piece 110 is detachably arranged.
[0097] It can be understood that, when the flattening device comprises the rotary driver 130, the flattening piece 110 can be detachably mounted on the electromagnetic pulse generator 120 or the rotary driver 130.
[0098] Optionally, the detachable arrangement of the flattening piece 110 can be, but is not limited to, a fastening connection mode, a buckle connection mode, a threaded connection mode, which is not specifically limited here.
[0099] By adopting the technical scheme, the flattening piece 110 can be replaced according to the shape and size of the tab 531 of the electrode assembly 530, so that the versatility of the flattening device is effectively improved.
[0100] In some embodiments of the present application, referring to Figure 3 , the flattening piece 110 further comprises an outer cover 112, and the electromagnetic coil 111 is arranged in the outer cover 112.
[0101] The outer cover 112 is a component for providing a mounting space of the electromagnetic coil 111. Optionally, the outer cover 112 can be various shapes and various sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. The material of the outer cover 112 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not specifically limited here.
[0102] Specifically, the outer cover 112 is provided with a via hole communicating between the mounting space of the electromagnetic coil 111 and the external environment of the outer cover 112, and the electromagnetic coil 111 can be electrically connected with the electromagnetic pulse generator 120 through the via hole.
[0103] In the case that the flattening assembly 100 further comprises the limiting sleeve ring 140, the limiting sleeve ring 140 can be integrally connected with the outer cover 112, for example, the limiting sleeve ring 140 is integrally formed with the outer cover 112 by a casting process. The limiting sleeve ring 140 can also be connected with the outer cover 112 in a separate manner, for example, the limiting sleeve ring 140 is connected with the outer cover 112 by a fastener such as a screw or a bolt.
[0104] By adopting the above technical solution, the electromagnetic coil 111 is effectively protected, thereby reducing the adverse effects of external factors such as dust and water vapor on the electromagnetic coil 111, and effectively improving the working stability of the kneading device.
[0105] In some embodiments of the present application, referring to Figure 4 , the electromagnetic pulse output circuit of the electromagnetic pulse generator 120 is provided with a power adjusting element 125.
[0106] The power adjusting element 125 is an electronic element for adjusting the output power of the battery pulse generator. It can be understood that the power adjusting element 125 is electrically connected between the capacitor 122 and the electromagnetic coil 111. Optionally, the power adjusting element 125 can be, but is not limited to, a programmable logic controller (PLC), a central processing unit (CPU), a silicon controlled element, a variable resistor, etc., which is not specifically limited here.
[0107] By adopting the above technical solution, the output power of the electromagnetic pulse generator 120 can be adjusted to adapt to different types of battery monomers 500, thereby effectively improving the versatility of the kneading device.
[0108] In some embodiments of the present application, the electromagnetic pulse generator 120 further comprises a housing (not shown in the figure), the electromagnetic pulse output circuit is arranged in the housing, and the outer wall of the housing is provided with a power adjusting control (not shown in the figure), which is connected with the power adjusting element 125.
[0109] The housing is a component for providing a mounting space for the electromagnetic pulse output circuit. Optionally, the housing can be of various shapes and sizes, such as a rectangular prism, a cylinder, a hexagonal prism, etc. The material of the housing can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not specifically limited here.
[0110] The power adjusting control is a component for controlling the power adjusting element 125. The type of the power adjusting control is determined according to the type of the power adjusting element 125, for example, when the power adjusting element 125 is a programmable logic controller, the power adjusting control can be a touch panel; for another example, when the power adjusting element 125 is a variable resistor, the power adjusting control can be a sliding button; which is not specifically limited here.
[0111] When it is necessary to adjust the output power of the electromagnetic pulse generator 120, the user can operate the power adjusting control to change the working parameters of the power adjusting element 125, so as to achieve the purpose of changing the output power of the electromagnetic pulse generator 120.
[0112] By adopting the technical scheme, the power of the electromagnetic pulse generator 120 can be conveniently adjusted.
[0113] In a second aspect, a flattening method of the flattening device is provided, and the flattening method comprises the following steps.
[0114] The flattening piece 110 of the flattening assembly 100 is arranged opposite to the tab 531 of the electrode assembly 530 along a preset direction.
[0115] The electromagnetic coil 111 of the flattening piece 110 is electrically connected to the electromagnetic pulse generator 120 of the flattening assembly 100.
[0116] The electromagnetic pulse generator 120 supplies current to the electromagnetic coil 111, so that the electromagnetic force repelling each other is generated between the flattening piece 110 and the tab 531 of the electrode assembly 530, and the tab 531 of the electrode assembly 530 is flattened under the action of the electromagnetic force.
[0117] The flattening method provided by the embodiment of the present application is that the electromagnetic coil 111 is electrically connected to the electromagnetic pulse generator 120, the electromagnetic pulse generator 120 supplies current to the electromagnetic coil 111, so that the two electromagnetic forces repelling each other are generated between the flattening piece 110 and the tab 531 of the electrode assembly 530, and the tab 531 of the electrode assembly 530 is flattened under the action of the two electromagnetic forces repelling each other, that is, the tab 531 of the electrode assembly 530 is subjected to the flattening force. In this way, the flattening piece 110 can flatten the tab 531 of the electrode assembly 530 only under the action of the electromagnetic force, and the flattening piece 110 and the tab 531 of the electrode assembly 530 will not be subjected to the mutual friction effect, and the tab 531 of the electrode assembly 530 will not be subjected to the high-frequency vibration, so that the metal chips generated in the flattening operation process are effectively reduced, thereby effectively reducing the adverse effects of the metal chips on the performance of the battery monomer 500.
[0118] In some embodiments of the present application, the flattening assembly 100 further comprises a rotary driver 130.
[0119] In the step of supplying the electromagnetic pulse to the electromagnetic coil 111 by the electromagnetic pulse generator 120, the rotary driver 130 drives the flattening piece 110 to perform the rotary motion in the plane perpendicular to the preset direction.
[0120] By adopting the technical scheme, in the circumferential direction around the rotary axis of the flattening piece 110, the electromagnetic force acting on the tab 531 of the electrode assembly 530 becomes more uniform, thereby effectively improving the flattening effect of the flattening device.
[0121] In some embodiments of the present application, the flattening device further comprises a feeding mechanism 300 and a fixing assembly 200.
[0122] The battery cell 500 is fixed on the fixing assembly 200.
[0123] In the step of delivering the electromagnetic pulse to the electromagnetic coil 111 by the electromagnetic pulse generator 120, the feeding mechanism 300 drives the flattening assembly 100 and the fixing assembly 200 to move towards each other along the preset direction.
[0124] By adopting the above technical solution, under the driving action of the feeding mechanism 300, the flattening piece 110 gradually approaches the tab 531 of the electrode assembly 530, and in this process, the electromagnetic force received by the tab 531 of the electrode assembly 530 gradually increases, so that the tab 531 of the electrode assembly 530 gradually deforms under force until the tab 531 of the electrode assembly 530 is completely flattened. In this way, the situation that the electromagnetic force received by the tab 531 of the electrode assembly 530 is too large in an instant to cause damage to the battery cell 500 can be improved, thereby effectively improving the yield of the battery cell 500.
[0125] In some embodiments of the present application, the output energy of the electromagnetic pulse generator 120 is 5J (Joule)-15J (Joule).
[0126] The output power of the electromagnetic pulse generator 120 can be determined according to actual needs, for example, the output power of the electromagnetic pulse generator 120 is 5J, 10J, 15J, etc., which is not limited here.
[0127] By adopting the above technical solution, not only can the situation that the electromagnetic force received by the tab 531 of the electrode assembly 530 is too small to cause the tab 531 of the electrode assembly 530 to be completely flattened be improved, but also the situation that the electromagnetic force received by the tab 531 of the electrode assembly 530 is too large to cause the tab 531 of the electrode assembly 530 to melt can be improved, effectively ensuring the flattening effect of the flattening device and improving the yield of the battery cell 500.
[0128] In a third aspect, a battery manufacturing equipment is provided, which comprises the flattening device of any one of the above embodiments.
[0129] The battery manufacturing equipment provided by the embodiments of the present application effectively reduces the metal chips generated in the process of flattening the tab 531 of the battery cell 500, thereby effectively improving the performance of the battery cell 500.
[0130] In some embodiments of the present application, the battery manufacturing device can further include a conveying device for conveying the battery cell 500, and a welding device, the flattening device and the welding device being sequentially arranged along the conveying direction of the conveying device, so that after the flattening device completes the flattening operation on the tab 531 of the electrode assembly 530, the battery cell 500 can be conveyed to the welding device by the conveying device for welding operation on the tab 531.
[0131] The above merely provides optional embodiments of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A tamping device, wherein, The flattening device comprises a flattening assembly, which comprises a flattening piece and an electromagnetic pulse generator, the flattening piece is arranged opposite to the flattening part of the workpiece along a preset direction, the flattening piece comprises an electromagnetic coil, the electromagnetic coil is electrically connected with the electromagnetic pulse generator, so that two electromagnetic forces repelling each other are generated between the flattening piece and the flattening part, thereby flattening the flattening part.
2. The kneading device of claim 1, wherein, The flattening assembly further comprises a rotary driver, which is used to drive the flattening piece to rotate in a plane perpendicular to the preset direction.
3. The kneading device of claim 2, wherein, The flattening piece is arranged spaced apart from the flattening part of the workpiece along the preset direction.
4. A kneading device according to any one of claims 1-3, wherein, The flattening device further comprises a feeding mechanism and a fixing assembly, the fixing assembly is used to fix the workpiece, and the feeding mechanism is used to drive the flattening assembly and the fixing assembly to move towards each other along the preset direction.
5. The kneading device of claim 4, wherein, The flattening device further comprises a base, the flattening assembly and the fixing assembly are mounted on the base, and the flattening assembly and / or the fixing assembly can move along the preset direction.
6. The kneading device of claim 5, wherein, The base is provided with a slide rail, and the flattening assembly and / or the fixing assembly is / are slidably mounted on the slide rail.
7. The kneading device according to any one of claims 1 to 6, wherein The flattening assembly further comprises a limiting sleeve ring, which is sleeved on the flattening part of the workpiece.
8. The kneading device of claim 7, wherein, The limiting sleeve ring is connected to the side of the flattening piece close to the workpiece.
9. The kneading device according to any one of claims 1 to 8, wherein The flattening piece is detachably arranged.
10. The kneading device according to any one of claims 1 to 9, wherein, The flattening piece further comprises an outer cover, and the electromagnetic coil is arranged in the outer cover.
11. The kneading device according to any one of claims 1 to 10, wherein The electromagnetic pulse generator has an electromagnetic pulse output circuit electrically connected with the electromagnetic coil, and the electromagnetic pulse output circuit is provided with a power adjusting element.
12. The kneading device of claim 11, wherein, The electromagnetic pulse generator further comprises a shell, the electromagnetic pulse output circuit is arranged in the shell, and the outer wall of the shell is provided with a power adjusting control element connected with the power adjusting element.
13. A battery manufacturing apparatus, wherein, The battery manufacturing equipment comprises the flattening device according to any one of claims 1-12.