Wrapping device and wrapping method for electrode assembly

Abstract

The present application discloses a wrapping device and wrapping method for an electrode assembly. The electrode assembly comprises an electrode main body; and the electrode main body has a first direction, a second direction, and a third direction which are orthogonal to one another, and comprises two main faces, two end faces, and two side faces. The wrapping device comprises a material storage and release assembly, a cutting assembly, and a first wrapping assembly. The material storage and release assembly is used for storing and releasing a material strip, the material strip comprises a plurality of wrapping films which are sequentially connected in the length direction of the material strip, and each wrapping film comprises two main wrapping areas which are spaced apart from each other and a connecting area connected between the two main wrapping areas. The cutting assembly is used for cutting a head end wrapping film located at the head end of the material strip from the material strip. The first wrapping assembly is used for wrapping the connecting area of the head end wrapping film onto the first of the two end faces, and wrapping the two main wrapping areas respectively onto the corresponding one of the two main faces to form an electrode wrapping body. In this manner, the operation complexity of a wrapping process can be simplified.

Description

Electrode assembly coating equipment and coating method

Technical field

[0001] The present application relates to the technical field of battery assembly, and in particular to coating equipment and a coating method for electrode assemblies. [Background Technology]

[0002] With the advancement of battery technology, batteries are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive powertrain sector. Batteries store chemical energy and controllably convert it into electrical energy. In recyclable batteries, after discharge, the active materials can be activated by recharging for continued use.

[0003] Batteries often feature an electrode assembly and a coating film. The coating film acts as an insulator and is used to cover the electrode assembly. During battery production, coating equipment is required to apply the coating film to the electrode assembly. However, existing coating equipment is complex and inconvenient to maintain.

[0004] [Summary of the invention]

[0005] In view of the above problems, the present application provides a coating device and a coating method for an electrode assembly, which can simplify the complexity of the coating process and facilitate the maintenance of the coating equipment.

[0006] In the first aspect, the present application provides a coating device for an electrode assembly, the electrode assembly including an electrode body, the electrode body having a first direction, a second direction and a third direction orthogonal to each other, and including two main surfaces arranged opposite to each other along the first direction, two end surfaces arranged opposite to each other along the second direction, and two side surfaces arranged opposite to each other along the third direction, the coating device including a discharge assembly, a cutting assembly and a first coating assembly. The discharge assembly is used to store and release a material strip, the material strip including a plurality of coating films connected in sequence along the length direction of the material strip, each coating film including two main coating areas spaced apart from each other and a connection area connected between the two main coating areas. The cutting assembly is used to cut the head end coating film located at the head end of the material strip from the material strip. The first coating assembly is used to coat the connection area of ​​the head end coating film on the first of the two end surfaces, and to coat the two main coating areas on the corresponding one of the two main surfaces, respectively, to form an electrode coating body.

[0007] Through this method, the first coating assembly can drive the electrode assembly close to the head-end coating film, so that the connection area of ​​the head-end coating film contacts and coats the first of the two end surfaces, and the two main coating areas respectively coat the corresponding one of the two main surfaces. This arrangement allows for continuous feeding of the coating film, reduces the layout of the robot, simplifies the complexity of the coating process, and facilitates maintenance of the coating equipment.

[0008] In some embodiments, the first coating assembly includes an electrode transmission mechanism and a main surface coating mechanism. The electrode transmission mechanism is configured to transport the electrode assembly in the second direction so that the first of the two end surfaces contacts the connection region. The main surface coating mechanism is configured to continue to transport the electrode assembly in the second direction after the first of the two end surfaces contacts the connection region, so that the two main coating regions are respectively coated on corresponding ones of the two main surfaces.

[0009] Through the above method, by setting up the electrode transmission mechanism and the main surface coating mechanism, the relative position relationship between the two main surfaces and the two coating areas, as well as the relative position relationship between the first of the two end surfaces and the connecting area can be adjusted. When the coating film coats the two main surfaces of the electrode body and the first of the two end surfaces, the stability of the coating process can be improved, making the coating action more concise and smooth.

[0010] In some embodiments, the main surface coating mechanism includes two pressing roller groups arranged side by side and spaced apart from each other. After the first of the two end surfaces contacts the connection area, the electrode transmission mechanism sends the electrode assembly and the head end coating film between the two pressing roller groups. The two pressing roller groups transmit the electrode assembly in a rolling manner and press the two main coating areas respectively on the corresponding one of the two main surfaces.

[0011] Through the above method, in the process of achieving coating film coating the two main surfaces, the arrangement and use of the robot can be reduced, the complexity of the coating equipment's action of pressing the two main coating areas onto the two main surfaces respectively can be simplified, and the maintenance of the coating equipment can be facilitated.

[0012] In some embodiments, at least one of the two pressing roller sets is configured to be able to float along the first direction.

[0013] By the above method, the distance between the two pressing roller groups can be adjusted so that the distance between the two pressing roller groups can more accurately match the size of the electrode assembly along the first direction, thereby improving the coating effect.

[0014] In some embodiments, one of the two pressing roller groups is an active pressing roller group, or both pressing roller groups are active pressing roller groups, and the movement direction of the contact point between the active pressing roller group and the main surface is consistent with the movement direction of the electrode transmission mechanism.

[0015] By adopting the above-mentioned method, the resistance of the pressing roller group to the movement of the electrode assembly along the second direction can be reduced, and the movement stability of the electrode assembly and the first end coating film entering between the two pressing roller groups can be improved.

[0016] In some embodiments, the first covering component further includes a first film positioning mechanism and a second film positioning mechanism, the first film positioning mechanism being used to position one end of the head end covering film toward the discharge component, and the second film positioning mechanism being used to position the other end of the head end covering film away from the discharge component, so that before the first of the two end faces contacts the connection area, the connection area of ​​the head end covering film and the two main covering areas are coplanar with each other, and the second direction is perpendicular to the plane where the connection area is located.

[0017] In the above manner, by setting the connection area and the two main covering areas to be coplanar with each other, the two main covering areas will not block the connection area, which can reduce the interference of the two main covering areas on the process of the first of the two end faces contacting the connection area, thereby improving the covering efficiency and covering effect.

[0018] In some embodiments, the first covering component also includes a third film positioning mechanism, which is located on the side of the first film positioning mechanism facing the discharge component and is used to position the subsequent covering film adjacent to the first end covering film. The cutting component cuts the material strip between the first film positioning mechanism and the third film positioning mechanism.

[0019] In the above manner, during the cutting process, the first film positioning mechanism and the third film positioning mechanism can position both sides of the preset position, thereby improving the stability of the cutting process and improving the cutting effect.

[0020] In some embodiments, the third film positioning mechanism is further configured to feed the subsequent covering film into the first film positioning mechanism and the second film positioning mechanism after the first end covering film is cut from the material strip.

[0021] By adopting the above method, the feeding of the coating film can be continuously connected between different positions, thereby improving the stability of the coating process.

[0022] In some embodiments, the electrode assembly further includes a pole ear portion protruding from a first one of the two end surfaces, an opening is provided on the connection region, and the first covering assembly is configured such that the pole ear portion passes through the opening.

[0023] In the above manner, after the pole ear portion passes through the opening, the pole ear portion can limit the connection area, thereby reducing the risk of the coating film sliding relative to the electrode assembly.

[0024] In some embodiments, the unloading assembly includes two unloading mechanisms, each of which stores and releases the material tape respectively, wherein the material tape corresponding to the first of the two unloading mechanisms serves as the working material tape and is fed into the first covering assembly, and the material tape corresponding to the second of the two unloading mechanisms serves as a spare material tape. The covering equipment also includes a switching assembly, which is used to fix the spare material tape on the working material tape so that the spare material tape can be fed into the first covering assembly under the drive of the working material tape.

[0025] Through the above method, when the working material strip is about to be released, the covering film on the spare material strip can be automatically fed into the first covering component without stopping the machine to change the roll, so as to continuously provide the covering film to the first covering component and improve the covering efficiency of the covering equipment.

[0026] In some embodiments, the switching assembly includes two pressing mechanisms and a material strip cutting mechanism. The two pressing mechanisms cooperate with each other to clamp the working material strip and the spare material strip from both sides of the working material strip and the spare material strip. The material strip cutting mechanism cuts the working material strip and the spare material strip in the clamped state so that the working material strip and the spare material strip form an upstream part and a downstream part respectively located upstream and downstream of the cutting position of the material strip cutting mechanism. The two pressing mechanisms connect the downstream part of the working material strip with the upstream part of the spare material strip.

[0027] Through the above method, when the working material tape is about to be released, the covering film on the spare material tape can be automatically replaced by the working material tape and sent into the first covering component without stopping the machine to change the roll, so as to continuously provide the covering film to the first covering component and improve the covering efficiency.

[0028] In some embodiments, the two pressing mechanisms respectively include a pressing member, and at least one of the two pressing mechanisms includes a pressing drive member, the pressing member includes a first pressing area and a second pressing area separated by a slot, the pressing drive member drives at least one pressing member so that the two first pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the two second pressing areas cooperate with each other to clamp the working material tape and the spare material tape, the material tape cutting mechanism includes a cutter, the cutter is telescopically arranged in the slot of the first of the two pressing members, and extends into the slot of the second of the two pressing members in the clamping state, thereby cutting the working material tape and the spare material tape.

[0029] In this way, the cutter can cut the working material strip and the spare material strip into two parts in one cutting action. This arrangement can improve cutting efficiency and simplify the cutting structure.

[0030] In some embodiments, the material strip cutting mechanism includes an elastic member, which is configured to elastically support the first of the two pressing members so that the first of the two pressing members elastically retreats in the clamping state, thereby allowing the cutter to extend out of the slot of the first of the two pressing members.

[0031] In the above manner, there is no need to provide a specific power device to drive the cutter to move relative to the two pressing members, which can simplify the cutting structure.

[0032] In some embodiments, the first of the two pressing mechanisms is configured to simultaneously adsorb the downstream portion of the working material tape and the upstream portion of the spare material tape, and the second of the two pressing mechanisms is configured to apply a connecting tape at the junction of the downstream portion of the working material tape and the upstream portion of the spare material tape.

[0033] By adopting the above-mentioned method, the connection efficiency and working stability of the downstream portion of the working material strip and the upstream portion of the spare material strip can be improved.

[0034] In some embodiments, the two pressing mechanisms respectively include a pressing part, and the pressing part of the first of the two pressing mechanisms is configured to simultaneously adsorb the downstream part of the working material belt and the upstream part of the spare material belt. The second of the two pressing mechanisms includes a pressing drive part, a rotating drive part and a glue part. The glue part is configured to carry the connecting tape, and the rotating drive part is configured to be able to rotationally drive the glue part and the pressing part of the second of the two pressing mechanisms to switch between a first state and a second state. In the first state, the pressing parts in the two pressing mechanisms are arranged relative to each other. In the second state, the glue part and the pressing part of the first of the two pressing mechanisms are arranged relative to each other. The pressing drive part is configured to drive the pressing parts in the two pressing mechanisms to be pressed against each other in the first state, and to drive the glue part and the pressing part of the first of the two pressing mechanisms to be pressed against each other in the second state.

[0035] Through the above-mentioned method, the movement stability of the pressing member and the adhesive member can be improved, and the cutting effect and the connection effect of the connecting tape can be improved.

[0036] In some embodiments, the unloading assembly corresponding to the working material belt is further configured to receive the upstream portion of the working material belt, and the switching assembly further includes a receiving mechanism for receiving the downstream portion of the spare material belt.

[0037] Through the above method, the degree of automation of the coating equipment can be improved.

[0038] In some embodiments, during the process of collecting the upstream portion of the working material belt and the downstream portion of the spare material belt, the two pressing mechanisms are in a separated state, and the two pressing mechanisms are also configured to respectively adsorb the downstream portion of the working material belt and the upstream portion of the spare material belt, and after the upstream portion of the working material belt and the downstream portion of the spare material belt are collected, the downstream portion of the working material belt and the upstream portion of the spare material belt are transferred to the first of the two pressing mechanisms.

[0039] Through the above method, after the two pressing mechanisms release the clamping of the working material belt and the spare material belt, the downstream part of the working material belt and the upstream part of the spare material belt will not loosen or dislocate relative to the joining position, thereby improving the accuracy of connecting the downstream part of the working material belt and the upstream part of the spare material belt.

[0040] In some embodiments, the two pressing mechanisms respectively include a pressing member, and at least one of the two pressing mechanisms includes a pressing drive member, the pressing member includes a first pressing area and a second pressing area spaced apart from each other, the pressing drive member drives at least one pressing member so that the two first pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the two second pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the material tape cutting mechanism cuts the working material tape and the spare material tape in the spaced area between the first pressing area and the second pressing area.

[0041] After the cutting is completed, the clamping drive drives the two clamping parts to separate from each other, and the two clamping parts respectively adsorb the downstream part of the working material strip and the upstream part of the spare material strip. After the upstream part of the working material strip and the downstream part of the spare material strip are collected, the clamping drive drives the two clamping parts to separate from each other, and the first of the two holding mechanisms simultaneously adsorbs the downstream part of the working material strip and the upstream part of the spare material strip.

[0042] By the above method, the downstream portion of the working material tape and the upstream portion of the spare material tape can be stably positioned, so as to facilitate the connection of the downstream portion of the working material tape and the upstream portion of the spare material tape.

[0043] In some embodiments, the coating equipment further includes a positioning component, which is configured to clamp and fix the electrode coating output by the first coating component from outside the two main coating areas.

[0044] By adopting the above method, the electrode package can be stably separated from the first package component.

[0045] In some embodiments, the coating film includes a side coating area connected to the main coating area, the coating equipment also includes a second coating component, the positioning component transfers the electrode coating body to the second coating component, and the second coating component is configured to drive the side coating area to contact and coat the side.

[0046] In the above manner, by providing the second covering component to cover the side covering area on the side surface, the covering effect of the covering film on the electrode body can be improved.

[0047] In some embodiments, the second covering assembly includes a side pressure plate, a first pressure plate transmission mechanism and a second pressure plate transmission mechanism. The first pressure plate transmission mechanism is used to transmit the side pressure plate along a first direction so that the side pressure plate pushes the side covering area to bend toward the side relative to the main covering area. The second pressure plate transmission mechanism is used to transmit the side pressure plate along a third direction so that the side pressure plate presses the side covering area on the side.

[0048] By the above method, the action of the second covering component bending the side covering area and the action of covering the side covering area on the side surface can be smoothly connected, which is beneficial to simplifying the action and structure of the second covering component and improving the covering efficiency.

[0049] In some embodiments, the covering film includes an end covering region connected to the main covering region, and the second covering component is configured to contact the transmission end covering region and cover the second of the two end surfaces.

[0050] By adopting the above-mentioned method, the coating effect of the coating film on the electrode body can be improved.

[0051] In some embodiments, the second covering assembly includes an end face pressure plate, a first pressure plate transmission mechanism and a third pressure plate transmission mechanism. The first pressure plate transmission mechanism is used to transmit the end face pressure plate along a first direction so that the end face pressure plate pushes the end covering area to bend relative to the main covering area toward the second of the two end faces. The third pressure plate transmission mechanism is used to transmit the end face pressure plate along a second direction so that the end face pressure plate presses the end covering area on the second of the two end faces.

[0052] In this way, the end surface pressing plate moves along the second direction close to the electrode body to press the end covering area on the second of the two end surfaces, so that the end covering area covers the second of the two end surfaces.

[0053] In some embodiments, the coating film also includes a side coating area and an end coating area connected to the main coating area, wherein the side coating area is coated on the side surface and the end coating area is coated on the second of the two end surfaces. The coating device also includes a first tape attaching assembly, which is used to drive the electrode assembly and the first tape to move relative to each other. The first tape includes a first part and a second part connected to each other. The first tape attaching assembly is arranged to attach the first part of the first tape to the side coating area and the second part of the first tape to the end coating area at the corner formed by the side surface and the second of the two end surfaces.

[0054] In this way, the first adhesive tape can connect the side covering area and the end covering area together, so that the side covering area and the end covering area can remain fixed relative to the electrode body, thereby improving the coating firmness of the coating film on the electrode body.

[0055] In some embodiments, the first tape attaching assembly includes a first unwinding mechanism, a first glue pulling mechanism and a first cutting mechanism. The first unwinding mechanism is configured to place and release the first tape roll, the first glue pulling mechanism is configured to clamp and pull the head end of the released portion of the first tape roll, and the first cutting mechanism is configured to cut the first tape from the released portion of the first tape roll.

[0056] The above method is conducive to automatically providing the first adhesive tape.

[0057] In some embodiments, the first glue pulling mechanism includes a first glue clamping cylinder, a first glue pulling motor and a first glue clamping part. The first glue clamping cylinder is used to drive the first glue clamping part to clamp the head end of the release part, and the first glue pulling motor is used to drive the first glue clamping part to move to pull the release part.

[0058] By means of the above method, the released portion of the first adhesive tape roll can be extended, and the released portion of the first adhesive tape roll is stretched to facilitate cutting.

[0059] In some embodiments, the first unwinding mechanism and the first cutting mechanism are provided in two corresponding sets. The first tape applying assembly includes a switching mechanism, which includes a roll holder and a switching motor. The two sets of the first unwinding mechanism and the first cutting mechanism are disposed on the roll holder. The switching motor drives the roll holder to rotate about a predetermined rotation axis, enabling the two sets of the first unwinding mechanism and the first cutting mechanism to switch between a standby position and a working position for the first adhesive drawing mechanism and the first cutting mechanism to operate. The rotation axis is perpendicular to the plane of the release portion.

[0060] The above method is conducive to quickly performing the roll-changing operation of the first tape roll, and can improve the roll-changing efficiency.

[0061] In some embodiments, the first adhesive tape applying assembly includes a first adhesive dispensing mechanism configured to absorb and remove the first adhesive tape. The first cutting mechanism includes a first pressing block, a first cutter, and a first cutting cylinder. The first pressing block and the first cutter are fixed relative to each other. The first cutting cylinder is configured to drive the first pressing block to press the release portion against the first adhesive dispensing mechanism and drive the first cutter to cut the first adhesive tape from the release portion.

[0062] In the above manner, the first pressing block can press and position the released portion, thereby improving the stability of the cutting process.

[0063] In some embodiments, the first adhesive tape applying assembly includes a first adhesive dispensing mechanism configured to absorb and remove the first adhesive tape. The first adhesive dispensing mechanism includes a first adhesive dispensing component, a first adhesive dispensing motor, a second adhesive dispensing motor, a first adhesive dispensing bracket, and a second adhesive dispensing bracket. The first adhesive dispensing component is configured to absorb the first adhesive tape. The first adhesive dispensing motor is disposed on the first adhesive dispensing bracket and drives the second adhesive dispensing bracket to move above the release portion. The second adhesive dispensing motor is disposed on the second adhesive dispensing bracket and drives the first adhesive dispensing component toward and away from the plane of the release portion.

[0064] Through the above-mentioned manner, the movement freedom of the first adhesive taking component can be improved, so as to facilitate the suction and transfer of the first adhesive tape.

[0065] In some embodiments, the first adhesive dispensing member includes a first adhesive dispensing sub-portion and a second adhesive dispensing sub-portion. The first adhesive dispensing sub-portion is configured to absorb the first portion of the first adhesive tape and adhere it to the side wrapping region. The second adhesive dispensing sub-portion is configured to absorb the second portion of the first adhesive tape and adhere it to the end wrapping region.

[0066] Through the above method, the continuity of the glue taking action and the glue applying action can be improved.

[0067] In some embodiments, the first adhesive dispensing sub-unit is a telescopic member. The second adhesive dispensing motor drives the first adhesive dispensing unit along the third direction, and the first adhesive dispensing unit presses the first portion of the first adhesive tape against the side covering area and contracts, so that the second adhesive dispensing unit can continue to move along the third direction and fit the end covering area, thereby attaching the second portion of the first adhesive tape to the end covering area. Alternatively, the second adhesive dispensing sub-unit is a telescopic member. The second adhesive dispensing motor drives the first adhesive dispensing unit along the second direction, and the second adhesive dispensing unit presses the second portion of the first adhesive tape against the end covering area and contracts, so that the first adhesive dispensing unit can continue to move along the second direction and fit the side covering area, thereby attaching the first portion of the first adhesive tape to the side covering area.

[0068] By adopting the above-mentioned method, the structural flexibility of the first glue-dispensing member can be improved, so that the first glue-dispensing member can adaptively adjust its shape according to the shape of the electrode body, thereby achieving diversified glue-dispensing actions.

[0069] In some embodiments, the first cutting mechanism is configured to cut out two first adhesive tapes from the release portion, and the number of the first adhesive tape extractors is two, and they respectively absorb the corresponding first adhesive tapes. The first adhesive tape attaching assembly includes a first adhesive tape extractor mechanism, which is used to absorb and remove the first adhesive tape. The first adhesive tape extractor mechanism includes a first adhesive tape extractor, a first adhesive tape extractor motor, a second adhesive tape extractor motor, a first adhesive tape extractor bracket, a second adhesive tape extractor bracket, a third adhesive tape extractor bracket, and an adhesive dispensing cylinder. The first adhesive tape extractor is used to absorb the first adhesive tape. The first adhesive tape extractor motor is arranged on the first adhesive tape extractor bracket, and drives the second adhesive tape extractor bracket to move above the release portion. The second adhesive tape extractor motor is arranged on the second adhesive tape extractor bracket, and drives the third adhesive tape extractor bracket and the two first adhesive tape extractors to move closer to and away from the plane where the release portion is located. The adhesive dispensing cylinder is arranged on the third adhesive tape extractor bracket, and the adhesive dispensing cylinder is arranged to drive the two first adhesive tape extractors away from each other so that the two first adhesive tape extractors correspond to two corners of the electrode assembly spaced apart along the third direction.

[0070] Through the above method, the first glue-taking mechanism can absorb and take away the two first tapes corresponding to each electrode assembly, and then simultaneously attach two first tapes to the two corners of the electrode assembly spaced along the third direction, thereby improving the glue-applying efficiency.

[0071] In some embodiments, the coating device also includes a second tape attaching assembly, which is used to drive the electrode assembly and the second tape to move relative to each other, and the second tape includes a first part and a second part connected to each other. The second tape attaching assembly is arranged to attach the first part of the second tape to the main coating area and the second part of the second tape to the side coating area at the corner formed by the side and the main surface.

[0072] By means of the above method, the side covering area and the main covering area can be kept fixed relative to the electrode body, thereby improving the firmness of the covering film on the electrode body.

[0073] In some embodiments, the number of the first parts of the second tape is two and they are located at both ends of the second part of the second tape. The second tape attaching assembly is configured to attach the two first parts of the second tape to corresponding ones of the two main covering areas respectively.

[0074] By adopting the above-mentioned method, the contact area between the second adhesive tape and the covering film can be increased, thereby improving the fixing effect of the opposite covering area.

[0075] In some embodiments, the second tape applying assembly includes a second unwinding mechanism, a second adhesive pulling mechanism, and a second cutting mechanism. The second unwinding mechanism is configured to place and release the second tape roll. The second adhesive pulling mechanism is configured to clamp and pull the leading end of the released portion of the second tape roll. The second cutting mechanism is configured to cut the second tape from the released portion of the second tape roll.

[0076] The above method is conducive to realizing automatic provision of the second adhesive tape.

[0077] In some embodiments, the second glue pulling mechanism includes a second glue clamping cylinder, a second glue pulling motor, and a second glue clamping member. The second glue clamping cylinder is used to drive the second glue clamping member to clamp the head end of the release portion, and the second glue pulling motor is used to drive the second glue clamping member to move to pull the release portion.

[0078] By means of the above method, the released portion of the second adhesive tape roll can be extended, and the released portion of the second adhesive tape roll is stretched to facilitate cutting.

[0079] In some embodiments, the second unwinding mechanism and the second cutting mechanism are two corresponding groups, and are spaced apart along the width direction of the release portion. The second tape applying assembly includes a glue pulling bracket, a glue pulling position change cylinder, and a glue pulling position change bracket. The glue pulling position change cylinder is arranged on the glue pulling bracket, and the second glue pulling mechanism is arranged on the glue pulling position change bracket. The glue pulling position change cylinder is arranged to drive the glue pulling position change bracket to move along the spacing direction of the two second unwinding mechanisms, so that the second glue pulling mechanism can switch between a standby position and a working position for the second glue pulling mechanism to operate. A group of the second unwinding mechanism and the second cutting mechanism are each arranged at the standby position and the working position.

[0080] By providing two sets of second unwinding mechanisms and second cutting mechanisms, the interference of the second tape roll changing operation on the adhesive drawing process can be reduced, thereby improving the adhesive drawing efficiency. By configuring the adhesive drawing position exchange cylinder to drive the adhesive drawing position exchange bracket to move along the spacing direction of the two second unwinding mechanisms, the position of the adhesive drawing mechanism can be made to correspond to the position of the second unwinding mechanism and second cutting mechanism in operation, thereby facilitating the adhesive drawing operation.

[0081] In some embodiments, the second adhesive tape applying assembly includes a second adhesive dispensing mechanism configured to absorb and remove the second adhesive tape. The second cutting mechanism includes a second pressing block, a second cutter, and a second cutting cylinder. The second pressing block and the second cutter are fixed relative to each other. The second cutting cylinder is configured to drive the second pressing block to press the release portion against the second adhesive dispensing mechanism and drive the second cutter to cut the second adhesive tape from the release portion.

[0082] In the above manner, the second pressing block can press and position the released portion, thereby improving the stability of the cutting process.

[0083] In some embodiments, the second adhesive tape applying assembly includes a second adhesive dispensing mechanism configured to absorb and remove the second adhesive tape. The second adhesive dispensing mechanism includes a second adhesive dispensing member, a fourth adhesive dispensing motor, and a fourth adhesive dispensing bracket. The second adhesive dispensing member is configured to absorb the second adhesive tape. The fourth adhesive dispensing motor is disposed on the fourth adhesive dispensing bracket and drives the second adhesive dispensing member to move relative to the release portion along the thickness direction of the release portion, and drives the second adhesive dispensing member toward and away from the plane of the release portion.

[0084] By adopting the above-mentioned method, the movement freedom of the second adhesive tape removal component can be improved, thereby facilitating the suction and transfer of the second adhesive tape.

[0085] In some embodiments, the second adhesive dispensing member includes a third adhesive dispensing portion and a fourth adhesive dispensing portion. The third adhesive dispensing portion is configured to absorb the first portion of the second adhesive tape and adhere it to the main wrapping area. The fourth adhesive dispensing portion is configured to absorb the second portion of the second adhesive tape and adhere it to the side wrapping area.

[0086] Through the above method, the continuity of the glue taking action and the glue applying action can be improved.

[0087] In some embodiments, the fourth adhesive dispensing sub-unit is a telescopic member. The fourth adhesive dispensing motor drives the second adhesive dispensing member in the third direction. The fourth adhesive dispensing sub-unit presses the second portion of the second adhesive tape against the side wrapping area and contracts, allowing the third adhesive dispensing sub-unit to continue moving in the third direction and adhere to the main wrapping area, thereby attaching the first portion of the second adhesive tape to the main wrapping area.

[0088] By adopting the above-mentioned method, the structural flexibility of the second glue-dispensing member can be improved, so that the second glue-dispensing member can adaptively adjust its shape according to the shape of the electrode body, thereby achieving diversified glue-dispensing actions.

[0089] In some embodiments, the second unwinding mechanism and the second cutting mechanism are two corresponding groups, and are spaced apart along the width direction of the release portion. The second glue taking mechanism includes a glue taking and changing cylinder and a glue taking and changing bracket. The glue taking and changing cylinder is arranged on the fourth glue taking bracket, and the second glue taking member is arranged on the glue taking and changing bracket. The glue taking and changing cylinder is arranged to drive the glue taking and changing bracket to move along the spacing direction of the two second unwinding mechanisms, so that the second glue taking member can switch between the standby position and the working position for the second glue taking mechanism to operate. A group of the second unwinding mechanism and the second cutting mechanism are each arranged at the standby position and the working position.

[0090] Through the above method, by setting the glue taking and changing cylinder to drive the glue taking and changing bracket to move along the spacing direction of the two second unwinding mechanisms, the position of the second glue taking component can correspond to the position of a group of second unwinding mechanisms and second cutting mechanisms that are working, thereby facilitating the glue taking operation.

[0091] In the second aspect, the present application provides a coating method for an electrode assembly, wherein the electrode assembly includes an electrode body, the electrode body having a first direction, a second direction, and a third direction orthogonal to each other, and including two main surfaces arranged opposite to each other along the first direction, two end surfaces arranged opposite to each other along the second direction, and two side surfaces arranged opposite to each other along the third direction. The coating method includes: controlling the discharge component to release the material strip, the material strip includes a plurality of coating films connected in sequence along the length direction of the material strip, each coating film includes two main coating areas spaced apart from each other and a connection area connected between the two main coating areas. Controlling the cutting component to cut the head end coating film located at the head end of the material strip from the material strip. Controlling the first coating component to coat the connection area of ​​the head end coating film on the first of the two end surfaces, and respectively coating the two main coating areas on the corresponding one of the two main surfaces to form an electrode coating body. In some embodiments, controlling the first covering assembly to cover the connection region of the head-end covering film on the first of the two end surfaces and to cover the two main covering regions on corresponding ones of the two main surfaces, includes: controlling the electrode transmission mechanism to convey the electrode assembly in the second direction so that the first of the two end surfaces contacts the connection region and is conveyed between two pressing roller groups; and controlling the two pressing roller groups to continue conveying the electrode assembly in the first direction in a rolling manner and to press the two main covering regions on corresponding ones of the two main surfaces.

[0092] In some embodiments, the unloading assembly includes two unloading mechanisms, each of which stores and releases the material tape respectively, wherein the material tape corresponding to the first of the two unloading mechanisms serves as the working material tape and is fed into the first coating assembly, and the material tape corresponding to the second of the two unloading mechanisms serves as the spare material tape. The coating method further includes: controlling the two holding mechanisms to cooperate with each other to clamp the working material tape and the spare material tape from both sides. Controlling the material tape cutting mechanism to cut the working material tape and the spare material tape in the clamping state so that the working material tape and the spare material tape form an upstream portion and a downstream portion located upstream and downstream of the cutting position of the material tape cutting mechanism, respectively. Controlling the two holding mechanisms to connect the downstream portion of the working material tape with the upstream portion of the spare material tape.

[0093] In some embodiments, controlling two pressing mechanisms to connect the downstream portion of the working material strip with the upstream portion of the backup material strip includes: controlling a first of the two pressing mechanisms to simultaneously suck the downstream portion of the working material strip and the upstream portion of the backup material strip, and controlling a second of the two pressing mechanisms to apply a connecting tape at a junction between the downstream portion of the working material strip and the upstream portion of the backup material strip.

[0094] In some embodiments, the electrode assembly includes a tab portion, the tab portion protruding from a first of the two end surfaces, and an opening is provided in a connection region. Controlling the first covering assembly to cover the connection region of the head-end covering film on the first of the two end surfaces includes: controlling the first covering assembly to pass the tab portion through the opening, and the connection region contacts and covers the first of the two end surfaces.

[0095] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

Brief Description of the Drawings

[0096] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0097] FIG1 is a schematic structural diagram of a vehicle to which an electrode assembly according to one or more embodiments is applied;

[0098] FIG2 is a schematic diagram of an exploded structure of a battery in which an electrode assembly is located according to one or more embodiments;

[0099] FIG3 is a schematic diagram of an exploded structure of a battery cell in which an electrode assembly is located according to one or more embodiments;

[0100] FIG4 is a schematic diagram of a partial structure of an electrode assembly according to one or more embodiments;

[0101] FIG5 is a simplified schematic diagram of the structure of a coating device according to one or more embodiments;

[0102] FIG6 is a schematic structural diagram of a coating device coating an electrode assembly to form an electrode coating according to one or more embodiments;

[0103] FIG7 is a schematic diagram of the relative movement process of the electrode assembly and the coating film according to one or more embodiments;

[0104] FIG8 is a schematic diagram of a process of forming an electrode coating body from a coating film and an electrode assembly according to one or more embodiments;

[0105] FIG9 is a schematic structural diagram of a main surface coating mechanism and an electrode coating body according to one or more embodiments;

[0106] FIG10 is a schematic diagram of the structure of a switching component according to one or more embodiments;

[0107] FIG11 is a schematic structural diagram of the pressing mechanism shown in FIG10 ;

[0108] FIG12 is a schematic structural diagram of another pressing mechanism shown in FIG10;

[0109] FIG13 is a schematic diagram illustrating a process of flipping an electrode assembly by a positioning assembly according to one or more embodiments;

[0110] FIG14 is a schematic structural diagram of a second covering component covering an electrode component according to one or more embodiments;

[0111] FIG15 is a schematic structural diagram of a second covering component according to one or more embodiments;

[0112] FIG16 is a schematic diagram of the partial structure of the transmission coating film and the electrode assembly of the second coating assembly shown in FIG14;

[0113] FIG17 is a schematic structural diagram of the coating film and electrode assembly shown in FIG14;

[0114] FIG18 is a schematic structural diagram of a covering film and an electrode assembly attached with a first tape and a second tape according to one or more embodiments;

[0115] FIG19 is a schematic structural diagram of a first tape applying assembly according to one or more embodiments;

[0116] FIG20 is a schematic diagram of the coordinated structure of the first unwinding mechanism, the first adhesive feeding mechanism, and the first adhesive tape roll according to one or more embodiments;

[0117] FIG21 is a schematic structural diagram of a first glue-dispensing mechanism according to one or more embodiments;

[0118] FIG22 is a partial structural diagram of a first glue pulling mechanism according to one or more embodiments;

[0119] FIG23 is a schematic structural diagram of a first cutting mechanism according to one or more embodiments;

[0120] FIG24 is a schematic diagram showing a structure in which a first adhesive removal member absorbs a first adhesive tape according to one or more embodiments;

[0121] FIG25 is a schematic diagram of the matching structure of the second tape applying assembly and the electrode assembly according to one or more embodiments;

[0122] FIG26 is a schematic diagram of the coordinated structure of the second unwinding mechanism, the second cutting mechanism, the second adhesive tape roll, and the second adhesive feeding mechanism according to one or more embodiments;

[0123] FIG27 is a schematic structural diagram of a second glue pulling mechanism according to one or more embodiments;

[0124] FIG28 is a schematic diagram showing the structure of a second adhesive dispensing mechanism adsorbing a second adhesive tape according to one or more embodiments;

[0125] FIG29 is a schematic diagram of a partial structure of the second adhesive-taking mechanism shown in FIG27 adsorbing the second adhesive tape;

[0126] FIG30 is a schematic structural diagram of a second cutting mechanism according to one or more embodiments;

[0127] FIG31 is a schematic diagram showing the structure of a flip assembly positioning an electrode assembly according to one or more embodiments;

[0128] FIG32 is a schematic structural diagram of an electrode assembly according to one or more embodiments.

[0129] Reference numerals in the specific embodiments are as follows: 1000a vehicle; 100a battery; 200a controller; 300a motor; 10a housing; 11a first sub-housing; 12a second sub-housing; 101b storage space; 1 battery cell; 100 housing; 110 storage case; 112 open end; 120 end cap; 200 electrode assembly; 201 electrode lug; 210 electrode body; 211 main surface; 212a first of two end surfaces; 212b second of two end surfaces; 212 end surface; 213 side surface; 220 electrode module; 221 positive electrode sheet; 222 separator 222; 223 negative electrode sheet; 230 fixing member; 240 electrode coating; 300 Coating equipment; 310 Unloading assembly; 311 Unloading mechanism; 312 Rewinding mechanism; 320 Cutting assembly; 330 First coating assembly; 331 Electrode transmission mechanism; 332 Main surface coating mechanism; 3321 Spring; 3322 Guide post; 3323 Fixed bracket; 3324 Floating bracket; 333 Pressing roller assembly; 3331 Pressing roller; 334 First film positioning mechanism; 3341 First roller; 335 Second film positioning mechanism; 336 Third film positioning mechanism; 3361 Second roller; 340 Switching assembly; 341 Holding mechanism; 3411 Pressing element; 3412 Pressing drive element; 3413 Slot; 3414 First pressing area; 3415 Second pressing area; 3417 Rotating drive element; 3418 Gluing element; 342 Strip cutting mechanism; 3421 Cutter; 3422 Elastic element; 3423 Support bracket; 350 Positioning assembly; 351 Moving bracket; 352 Clamping arm; 360 Flipping assembly; 361 Main holding cylinder; 362 Main holding member; 363 Side holding cylinder; 364 Side holding member; 365 Rotating motor; 366 Rotating bracket; 367 Shifting motor; 368 Shifting bracket; 370 Second covering assembly; 371 Side pressure plate; 372 First pressure plate transmission mechanism; 373 Second pressure plate transmission mechanism; 374 End pressure plate; 3741 End stop block; 3711 Side stop block; 375 Third pressure plate transmission mechanism; 376 First pressure plate cylinder; 3761 Second pressure plate cylinder; 377 Pressure plate transmission motor; 378 First pressure plate bracket; 379 Second pressure plate bracket; 380 First adhesive tape attaching assembly; 381 First unwinding mechanism; 382 First adhesive pulling mechanism; 3821 First adhesive clamping cylinder; 3822 First adhesive pulling motor; 3823 First adhesive clamping member; 383 First cutting mechanism; 3831 First pressure block; 3832 First cutter; 3833 First cutting cylinder; 384 First tape roll; 385 Switching mechanism; 3851 Material roll holder; 3852 Switching motor; 386 First adhesive dispensing mechanism; 3861 First adhesive dispensing member; 3862 First adhesive dispensing motor; 3863 Second adhesive dispensing motor; 3864 First adhesive dispensing holder; 3865 Second adhesive dispensing holder; 3866 First sub-adhesive dispensing unit; 3867 Second sub-adhesive dispensing unit; 3868 Third adhesive dispensing holder; 3869 Glue dispensing cylinder;387 First glue feeding mechanism; 390 Second adhesive tape attaching assembly; 391 Second unwinding mechanism; 392 Second glue pulling mechanism; 3921 Second glue clamping cylinder; 3922 Second glue pulling motor; 3923 Second glue clamping member; 393 Second cutting mechanism; 3931 Second pressing block; 3932 Second cutter; 3933 Second cutting cylinder; 394 Glue pulling bracket; 3941 Glue pulling position shifting cylinder; 3942 Glue pulling position shifting bracket; 395 Second glue dispensing mechanism; 3951 Second glue dispensing member; 3952 Fourth glue dispensing motor; 3953 Fourth glue dispensing bracket; 3954 Third sub-glue dispensing unit; 3955 Fourth sub-glue dispensing unit; 3956 Glue dispensing position shifting cylinder; 3957 Glue dispensing position shifting bracket; 396 Second tape roll; 397 Second glue feeding mechanism; 400 coating film; 401 material tape; 402 working material tape; 403 downstream portion of working material tape; 404 upstream portion of working material tape; 405 spare material tape; 406 downstream portion of spare material tape; 407 upstream portion of spare material tape; 409 head end coating film; subsequent coating film 411; 410 main coating area; 420 connecting area; 421 opening; 430 side coating area; 440 end coating area; 511 first portion of first adhesive tape; 512 second portion of first adhesive tape; 510 first adhesive tape; 521 first portion of second adhesive tape; 522 second portion of second adhesive tape; 520 second adhesive tape; D1 first direction; D2 second direction; D3 third direction; D4 width direction of release portion; D5 spacing direction of two second unwinding mechanisms; D6 thickness direction of release portion; D7 length direction of material tape; D8 movement direction of contact point between active pressure roller group and main surface; D9 movement direction of electrode transmission mechanism. ; [Specific implementation method]

[0130] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0131] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0132] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0133] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0134] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0135] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0136] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0137] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0138] With the advancement of battery technology, batteries are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive powertrain sector. Batteries store chemical energy and controllably convert it into electrical energy. In recyclable batteries, after discharge, the active materials can be activated by recharging for continued use.

[0139] Batteries often feature an electrode assembly and a coating film. The coating film acts as an insulator and is used to cover the electrode assembly. During battery production, coating equipment is required to apply the coating film to the electrode assembly. However, existing coating equipment is complex and inconvenient to maintain.

[0140] To simplify the wrapping process, the material strip is configured to include multiple wrapping films sequentially connected along its length, allowing for a continuous supply of wrapping films. The unwinding assembly is configured to store and release the material strip, simplifying the film removal process. The cutting assembly is configured to cut the wrapping film at the head end of the strip from the strip, allowing the wrapping films to be separated from one another.

[0141] Based on the above considerations, the present application provides a coating device and a coating method for an electrode assembly. The electrode assembly includes an electrode body, the electrode body has a first direction, a second direction and a third direction that are orthogonal to each other, and includes two main faces arranged opposite to each other along the first direction, two end faces arranged opposite to each other along the second direction, and two side faces arranged opposite to each other along the third direction. The coating equipment includes a discharge assembly, a cutting assembly and a first coating assembly. The discharge assembly is used to store and release the material strip, and the material strip includes a plurality of coating films connected in sequence along the length direction of the material strip, and each coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. The cutting assembly is used to cut the head end coating film located at the head end of the material strip from the material strip. The first coating assembly is used to coat the connecting area of ​​the head end coating film on the first of the two end faces, and to coat the two main coating areas on the corresponding one of the two main faces, respectively, to form an electrode coating body. In this way, the coating film can be fed continuously, the arrangement of the robot can be reduced, the complexity of the coating process is simplified, and the maintenance of the coating equipment is facilitated.

[0142] The coating equipment and coating method of the electrode assembly disclosed in the embodiments of the present application are used to coat the electrode assembly with a coating film. The electrode assembly and the coating film are arranged on a battery. The battery can be used in an electrical device that uses the battery as a power source or various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0143] For the convenience of description, the following embodiments are described by taking a vehicle 1000a as an example of an electrical device according to an embodiment of the present application.

[0144] Referring to Figure 1, vehicle 1000a can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery 100a is provided inside vehicle 1000a. Battery 100a can be provided at the bottom, head, or tail of vehicle 1000a. Battery 100a can be used to power vehicle 1000a. For example, battery 100a can serve as an operating power source for vehicle 1000a. Vehicle 1000a can also include a controller 200a and a motor 300a. Controller 200a is used to control battery 100a to power motor 300a, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000a.

[0145] In some embodiments of the present application, the battery 100a can serve not only as an operating power source for the vehicle 1000a, but also as a driving power source for the vehicle 1000a, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000a.

[0146] In some embodiments, the battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0147] The battery 100 a mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 1 to provide higher voltage and capacity.

[0148] In the embodiment of the present application, the battery cell 1 may be a secondary battery, which refers to a battery cell 1 that can be recharged to activate the active material after discharge and continue to be used. Each battery cell 1 may also be a primary battery.

[0149] The battery cell 1 includes, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The battery cell 1 may be cylindrical, flat, rectangular, or have other shapes.

[0150] In some embodiments, the battery 100 a may be a battery module. When there are multiple battery cells 1 , the multiple battery cells 1 are arranged and fixed to form a battery module.

[0151] In some embodiments, referring to FIG. 2 , the battery 100 a may be a battery pack, which includes a housing 10 a and battery cells 1 . The battery cells 1 or battery modules are housed in the housing 10 a .

[0152] In some embodiments, the box 10a can serve as part of the chassis structure of the vehicle 1000a. For example, a portion of the box 10a can become at least a portion of the floor of the vehicle 1000a, or a portion of the box 10a can become at least a portion of the cross member and longitudinal member of the vehicle 1000a.

[0153] Referring to Figure 2 , battery 100a includes a housing 10a and a battery cell 1, with the battery cell 1 housed within the housing 10a. The housing 10a provides a storage space 101b for the battery cell 1 and can employ a variety of structures. In some embodiments, the housing 10a can include a first sub-housing 11a and a second sub-housing 12a, which overlap each other and together define a storage space 101b for the battery cell 1. The second sub-box 12a can be a hollow structure with one end open, and the first sub-box 11a can be a plate-like structure. The first sub-box 11a covers the open side of the second sub-box 12a, so that the first sub-box 11a and the second sub-box 12a together define the storage space 101b. The first sub-box 11a and the second sub-box 12a can also be hollow structures with one end open, with the open side of the first sub-box 11a covering the open side of the second sub-box 12a. Of course, the box 10a formed by the first sub-box 11a and the second sub-box 12a can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0154] In battery 100a, there may be multiple battery cells 1, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 1. Multiple battery cells 1 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire battery cell 1 may be housed within the housing 10a. Alternatively, battery 100a may comprise multiple battery cells 1 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 10a. Battery 100a may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 1.

[0155] Referring to Figure 3 , a battery cell 1 is the smallest unit of a battery. In this embodiment, a cylindrical battery cell 1 is used as an example. As shown in Figure 3 , the battery cell 1 includes a housing 100 , an electrode assembly 200 , and other functional components.

[0156] In some embodiments, the housing 100 is used to encapsulate the electrode assembly 200 and the electrolyte and other components. The housing 100 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film.

[0157] The housing 100 may include an end cap 120 and a containment shell 110. The end cap 120 is a component that covers the opening of the containment shell 110 to isolate the internal environment of the battery cell 1 from the external environment. The shape of the end cap 120 can be adapted to the shape of the containment shell 110 to match the containment shell 110. Optionally, the end cap 120 can be made of a material with a certain hardness and strength (such as an aluminum alloy). This makes the end cap 120 less susceptible to deformation when subjected to compression or collision, thereby providing the battery cell 1 with greater structural strength and improved safety. The end cap 120 may be provided with functional components such as a terminal. The terminal can be used to electrically connect to the electrode assembly 200 for outputting or inputting electrical energy into or out of the battery cell 1. In some embodiments, the end cap 120 may also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 1 reaches a threshold. The end cap 120 may also be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component may be provided inside the end cap 120 to isolate the electrical connection components in the housing 110 from the end cap 120 to reduce the risk of short circuit. For example, the insulating component may be made of plastic, rubber, or the like.

[0158] The containment shell 110 is a component that cooperates with the end cap 120 to form the internal environment of the battery cell 1. This internal environment can be used to accommodate the electrode assembly 200, electrolyte, and other components. The containment shell 110 and the end cap 120 can be separate components. When connected, the containment shell 110 and the end cap 120 form the internal environment of the battery cell 1. Alternatively, the end cap 120 and the containment shell 110 can be integrated. Specifically, the end cap 120 and the containment shell 110 can form a common connection surface before other components are inserted into the shell. When the interior of the containment shell 110 needs to be sealed, the end cap 120 is then placed over the containment shell 110. The containment shell 110 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the containment shell 110 can be determined based on the specific shape and size of the electrode assembly 200. The containment shell 110 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, and aluminum alloys.

[0159] The electrode assembly 200 is a component where electrochemical reactions occur in the battery cell 1. One or more electrode assemblies 200 may be contained in the housing 110.

[0160] In some embodiments, the electrode assembly 200 includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 1, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through. As shown in FIG4 , the separator can be a diaphragm 222.

[0161] In some embodiments, as shown in FIG. 4 , the positive electrode may be a positive electrode sheet 221 . The positive electrode sheet 221 may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0162] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0163] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0164] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include but are not limited to at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides may include but are not limited to lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3O2 (also referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (also referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (also referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2) and at least one of its modified compounds, etc.

[0165] In some embodiments, as shown in FIG. 4 , the negative electrode may be a negative electrode plate 223 , and the negative electrode plate 223 may include a negative electrode current collector.

[0166] As an example, the negative electrode current collector may be a metal foil, a metal foam, a composite current collector, or a carbon foam. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, a carbon electrode, carbon, nickel, or titanium, etc. may be used. The metal foam may be nickel foam, copper foam, aluminum foam, or an alloy foam. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, or silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0167] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0168] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0169] As an example, the negative electrode active material may be a negative electrode active material for battery cells 1 that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0170] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0171] In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

[0172] In some embodiments, the separator is a membrane 222. The present application has no particular limitation on the type of the membrane 222, and any known porous membrane 222 with good chemical and mechanical stability can be selected.

[0173] As an example, the primary material of separator 222 can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. Separator 222 can be a single-layer film or a multi-layer composite film, without particular limitation. When separator 222 is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0174] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0175] In some embodiments, the battery cell 1 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0176] The electrolyte may be a form of electrolyte and may include an electrolyte salt and a solvent.

[0177] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate.

[0178] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone and diethyl sulfone. The solvent can also be an ether solvent. Ether solvents can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether and crown ether.

[0179] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0180] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0181] As an example, the polymer solid electrolyte may be polyether, polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single ion polymer, polyionic liquid-lithium salt, cellulose, etc. As an example, the polymer solid electrolyte may be polyethylene oxide.

[0182] As an example, the inorganic solid electrolyte can be an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superion conductor (lithium germanium phosphosulfide, silver germanium sulfide), amorphous sulfide) and one or more of a halide solid electrolyte, a nitride solid electrolyte and a hydride solid electrolyte.

[0183] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0184] In some embodiments, the electrode assembly 200 is a wound structure in which the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0185] In some embodiments, the electrode assembly 200 is provided with a tab portion 201 that can conduct current from the electrode assembly 200. The tab portion 201 includes a positive tab and a negative tab. The positive tab and the negative tab can be located together at one end of the electrode body or at two ends of the electrode body.

[0186] According to some embodiments of the present application, as shown in Figures 5 to 8, the electrode assembly 200 described in the embodiment of the coating equipment of the electrode assembly of the present application includes an electrode body 210, the electrode body 210 having a first direction D1, a second direction D2, and a third direction D3 that are orthogonal to each other, and includes two main surfaces 211 arranged opposite to each other along the first direction D1, two end surfaces 212 arranged opposite to each other along the second direction D2, and two side surfaces 213 arranged opposite to each other along the third direction D3. The coating equipment 300 includes a discharge assembly 310, a cutting assembly 320, and a first coating assembly 330. The discharge assembly 310 is used to store and release a material strip 401. The material strip 401 includes a plurality of coating films 400 connected in sequence along the length direction D7 of the material strip 401. Each coating film 400 includes two main coating regions 410 spaced apart from each other and a connecting region 420 connected between the two main coating regions 410. The cutting assembly 320 is used to cut the head end coating film 409 at the head end of the material strip 401 from the material strip 401. The first coating assembly 330 is used to coat the connection region 420 of the head end coating film 409 on the first one 212a of the two end surfaces 212, and to coat the two main coating regions 410 on the corresponding one of the two main surfaces 211, respectively, to form an electrode coating 240.

[0187] Specifically, the material strip 401 can be placed in a roll on the unwinding assembly 310. The unwinding assembly 310 can gradually release the material strip 401 from the material roll, so that the released portion of the material strip 401 gradually approaches the first covering assembly 330. One end of the released portion of the material strip 401 is connected to the material roll, and the other end of the released portion of the material strip 401 is the leading end of the material strip 401. In other words, the leading end of the material strip 401 is the end of the material strip 401 that is close to the first covering assembly 330. In the longitudinal direction D7 of the material strip 401, the size of the released portion of the material strip 401 is larger than the size of one covering film 400. The leading end covering film 409 is the covering film 400 on the released portion of the material strip 401 that is closest to the leading end of the material strip 401. The covering film 400 on the material strip 401 that is adjacent to the leading end covering film 409 is the subsequent covering film 411. In other words, the leading end of the material strip 401 is positioned on the leading end coating film 409 to form an electrode coating 240. As the previous leading end coating film 409 is cut from the released portion of the material strip 401 by the cutting assembly 320 and coated on the electrode assembly 200, the subsequent coating film 411 becomes the new leading end coating film 409, and the leading end of the material strip 401 is positioned on the new leading end coating film 409.

[0188] The first one 212a of the two end surfaces 212 can be connected between the two main surfaces 211 of the electrode body 210, so that the connection region 420 covers the first one 212a of the two end surfaces 212, and the two main covering regions 410 can cover the two main surfaces 211 respectively. In some embodiments, the two main covering regions 410 are movable relative to the connection region 420, so that when the connection region 420 covers the first one 212a of the two end surfaces 212, the two main covering regions 410 can cover the two main surfaces 211 by moving relative to the connection region 420. The first covering component 330 can be configured to drive the two main covering regions 410 to move respectively relative to the connection region 420.

[0189] The first coating assembly 330 can move the electrode assembly 200 toward the first-end coating film 409, so that the connection region 420 of the first-end coating film 409 contacts and coats the first 212a of the two end surfaces 212, and the two main coating regions 410 respectively coat a corresponding one of the two main surfaces 211. This arrangement allows for continuous feeding of the coating film 400, reduces the number of robotic arms, simplifies the complexity of the coating process, and facilitates maintenance of the coating apparatus 300.

[0190] According to some embodiments of the present application, optionally, as shown in Figures 6 and 9, the first coating assembly 330 includes an electrode transmission mechanism 331 and a main surface coating mechanism 332. The electrode transmission mechanism 331 is used to transport the electrode assembly 200 along the second direction D2 so that the first one 212a of the two end surfaces 212 contacts the connection area 420. The main surface coating mechanism 332 is used to continue to transmit the electrode assembly 200 along the second direction D2 after the first one 212a of the two end surfaces 212 contacts the connection area 420, and to respectively coat the two main coating areas 410 on a corresponding one of the two main surfaces 211.

[0191] The electrode transmission mechanism 331 is in motion. For example, the electrode transmission mechanism 331 may include a conveyor belt, a clamping jaw, or a roller. The conveyor belt can move in the second direction D2 to drive the electrode assembly 200 in the second direction D2. The clamping jaw can move in the second direction D2 to clamp the electrode assembly 200 and move in the second direction D2. The tangential direction of the roller at the contact point with the electrode assembly 200 is parallel to the second direction D2, so that the roller drives the electrode assembly 200 in the second direction D2 by rolling.

[0192] Furthermore, the electrode transmission mechanism 331 can continuously transport a plurality of electrode assemblies 200 along the second direction D2. Each head end coating film 409 and an electrode assembly 200 can form an electrode coating body 240.

[0193] The main surface covering mechanism 332 can drive the two main covering regions 410 to approach the electrode assembly 200 respectively until the two main covering regions 410 respectively cover a corresponding one of the two main surfaces 211 .

[0194] When the electrode transmission mechanism 331 transmits the electrode assembly 200 , the position where the electrode transmission mechanism 331 acts on the electrode assembly 200 may include the two main surfaces 211 , the two side surfaces 213 , and the second one 212 b of the two end surfaces 212 .

[0195] By setting up the electrode transmission mechanism 331 and the main surface coating mechanism 332, the relative position relationship between the two main surfaces 211 and the two coating areas can be adjusted, as well as the relative position relationship between the first one 212a of the two end surfaces 212 and the connecting area 420 can be adjusted. When the coating film 400 coats the two main surfaces 211 of the electrode body 210 and the first one 212a of the two end surfaces 212, the stability of the coating process can be improved, making the coating action more simple and smooth.

[0196] According to some embodiments of the present application, optionally, as shown in Figures 6, 7 and 9, the main surface coating mechanism 332 includes two pressing roller groups 333 arranged side by side and at intervals, and the electrode transmission mechanism 331 sends the electrode assembly 200 and the head end coating film 409 between the two pressing roller groups 333 after the first 212a of the two end surfaces 212 contacts the connection area 420. The two pressing roller groups 333 transmit the electrode assembly 200 in a rolling manner, and press the two main coating areas 410 on the corresponding one of the two main surfaces 211 respectively.

[0197] The spacing between the two pressing roller groups 333 matches the spacing between the two main surfaces 211 of the electrode assembly 200. In the process of the electrode assembly 200 and the head end coating film 409 entering between the two pressing roller groups 333, the two pressing roller groups 333 can limit the two main coating areas 410 so that the two main coating areas 410 are respectively pressed on the corresponding one of the two main surfaces 211.

[0198] The pressure roller group 333 may include a plurality of pressure rollers 3331 , wherein the tangential direction of the pressure rollers 3331 at the contact position with the electrode assembly 200 is parallel to the second direction D2 , so that the pressure rollers 3331 drive the electrode assembly 200 to move along the second direction D2 by rolling.

[0199] With such an arrangement, in the process of achieving the coating film 400 coating the two main surfaces 211, the arrangement and use of the robot can be reduced, the complexity of the coating device 300 pressing the two main coating areas 410 respectively onto the two main surfaces 211 can be simplified, and the maintenance of the coating device 300 can be facilitated.

[0200] In some embodiments, the electrode transmission mechanism 331 is configured to transport the electrode assembly 200 between the two pressure roller groups 333 along the second direction D2, and at the same time, the rotation speed of the pressure roller 3331 matches the speed at which the electrode transmission mechanism 331 transports the electrode assembly 200 along the second direction D2, thereby reducing the resistance of the pressure roller group 333 to the movement of the electrode assembly 200 along the second direction D2.

[0201] According to some embodiments of the present application, as shown in Figures 6 and 9, at least one of the two pressing roller groups 333 is optionally configured to float along the first direction D1. This configuration allows for adaptive adjustment of the distance between the two pressing roller groups 333, such that the distance between the two pressing roller groups 333 better matches the size of the electrode assembly 200 along the first direction D1, thereby improving the coating effect.

[0202] Furthermore, at least one of the two pressure roller groups 333 is configured to float along a first direction D1 relative to the electrode assembly 200 located between the two pressure roller groups 333. In some embodiments, at least one of the two pressure roller groups 333 floats along the first direction D1 via a floating cylinder. In other embodiments, at least one of the two pressure roller groups 333 floats along the first direction D1 via a spring 3321. For example, the main surface coating mechanism 332 includes a spring 3321, a guide post 3322, a fixed bracket 3323, and a floating bracket 3324. At least one of the two pressure roller groups 333 is disposed on the floating bracket 3324. The guide post 3322 extends along the first direction D1. The spring 3321 is sleeved on the guide post 3322 and abuts between the fixed bracket 3323 and the floating bracket 3324. The fixed bracket 3323 and the floating bracket 3324 are slidably connected via the guide post 3322.

[0203] According to some embodiments of the present application, optionally, as shown in Figures 6 and 9, one of the two pressure roller groups 333 is an active pressure roller group 333, or the two pressure roller groups 333 are respectively active pressure roller groups 333, and the movement direction D8 of the contact point between the active pressure roller group 333 and the main surface 211 is consistent with the movement direction D9 of the electrode transmission mechanism 331.

[0204] Such an arrangement can reduce the resistance of the pressing roller group 333 to the movement of the electrode assembly 200 along the second direction D2, and improve the movement stability of the electrode assembly 200 and the first end coating film 409 entering between the two pressing roller groups 333.

[0205] According to some embodiments of the present application, optionally, as shown in Figures 6 and 7, the first covering component 330 also includes a first film positioning mechanism 334 and a second film positioning mechanism 335, the first film positioning mechanism 334 is used to position one end of the head end covering film 409 toward the discharge component 310, and the second film positioning mechanism 335 is used to position the other end of the head end covering film 409 away from the discharge component 310, so that before the first 212a of the two end faces 212 contacts the connection area 420, the connection area 420 of the head end covering film 409 and the two main covering areas 410 are coplanar with each other, and the second direction D2 is perpendicular to the plane where the connection area 420 is located.

[0206] For example, the spacing between the first film positioning mechanism 334 and the second film positioning mechanism 335 can be set to allow the head end coating film 409 to stretch, thereby making the connection area 420 and the two main coating areas 410 coplanar with each other. By setting the connection area 420 and the two main coating areas 410 to be coplanar with each other, the two main coating areas 410 will not block the connection area 420, and the interference of the two main coating areas 410 on the process of the first one 212a of the two end surfaces 212 contacting the connection area 420 can be reduced, thereby improving the coating efficiency and coating effect.

[0207] Optionally, the second film positioning mechanism 335 positions the other end of the head-end covering film 409 away from the discharge assembly 310 by clamping.

[0208] According to some embodiments of the present application, optionally, as shown in Figure 6, the first covering component 330 also includes a third film positioning mechanism 336, which is located on the side of the first film positioning mechanism 334 facing the discharge component 310, and is used to position the subsequent covering film 411 adjacent to the head end covering film 409, and the cutting component 320 cuts the material strip 401 between the first film positioning mechanism 334 and the third film positioning mechanism 336.

[0209] Specifically, the released portion of the material strip 401 may include the first-end covering film 409 and at least a portion of the subsequent covering film 411. The cutting assembly 320 cuts the material strip 401 at a predetermined position between the first film positioning mechanism 334 and the third film positioning mechanism 336. The predetermined position between the first film positioning mechanism 334 and the third film positioning mechanism 336 serves as the dividing line between the first-end covering film 409 and the subsequent covering film 411. During the cutting process, the first film positioning mechanism 334 and the third film positioning mechanism 336 can position both sides of the predetermined position, thereby improving the stability of the cutting process and enhancing the cutting effect.

[0210] For example, the first film positioning mechanism 334 and the third film positioning mechanism 336 can each clamp and position the film on either side of a preset position. For another example, the first film positioning mechanism 334 includes two first rollers 3341. The side of the preset position away from the unloading assembly 310 can be clamped between the two first rollers 3341. When the first rollers 3341 rotate, they can convey the released portion of the material strip 401 toward the third film positioning mechanism 336, allowing the released portion of the material strip 401 to reach the third film positioning mechanism 336. The third film positioning mechanism 336 includes two second rollers 3361. The side of the preset position closer to the unloading assembly 310 can be clamped between the two second rollers 3361. When the second rollers 3361 rotate, they can convey the released portion of the material strip 401 toward the first film positioning mechanism 334, allowing the released portion of the material strip 401 to reach the first film positioning mechanism 334.

[0211] According to some embodiments of the present application, optionally, as shown in FIG6 , the third film positioning mechanism 336 is further configured to feed the subsequent covering film 411 into the first film positioning mechanism 334 and the second film positioning mechanism 335 after the first end covering film 409 is cut from the material strip 401 .

[0212] Such an arrangement allows the coating film 400 to be fed continuously between different positions, thereby improving the stability of the coating process.

[0213] For example, the third film positioning mechanism 336 includes two second rollers 3361 respectively, and the end of the subsequent coating film 411 away from the discharge assembly 310 can be clamped between the two second rollers 3361. When the two second rollers 3361 rotate, they can drive the subsequent coating film 411 to move toward the first film positioning mechanism 334 and the second film positioning mechanism 335, so that the subsequent coating film 411 enters between the first film positioning mechanism 334 and the second film positioning mechanism 335 in turn.

[0214] According to some embodiments of the present application, optionally, as shown in Figures 6 to 8, the electrode assembly 200 also includes a pole ear portion 201 protruding from the first one 212a of the two end surfaces 212, an opening 421 is provided on the connection area 420, and the first covering assembly 330 is configured so that the pole ear portion 201 passes through the opening 421.

[0215] The presence of the pole ear portion 201 increases the difficulty of the coating film 400 coating the first 212a of the two end surfaces 212. The opening 421 provided in the connection region 420 allows the pole ear portion 201 to be avoided, thereby reducing interference with the coating process by the pole ear portion 201, thereby improving the coating effect of the coating film 400 on the first 212a of the two end surfaces 212.

[0216] After the electrode ear portion 201 passes through the opening 421 , the electrode ear portion 201 can limit the connection area 420 , thereby reducing the risk of the coating film 400 sliding relative to the electrode assembly 200 .

[0217] When the electrode assembly 200 is installed in the housing 100, the electrode ear portion 201 can first be arranged opposite to and spaced from the opening of the housing 100 along the second direction D2, and then the electrode assembly 200 can be moved toward the housing 100 along the second direction D2, so that the electrode ear portion 201 and the first of the two end surfaces 212a enter the housing 100 in sequence. The connection area 420 and the main covering area 410 can form a convergence for the electrode assembly 200, so that the connection between the main surface 211 of the electrode assembly 200 and the first of the two end surfaces 212a forms an arc surface, making the first of the two end surfaces 212a enter the housing 100 more smoothly, facilitating the installation of the electrode assembly 200 into the housing 100, and facilitating improved assembly efficiency and assembly effect.

[0218] Furthermore, the electrode body 210 has no ear portion 201 disposed on the two main surfaces 211, the two side surfaces 213, and the second one 212b of the two end surfaces 212. The coating device 300 controls the coating film 400 to coat the first one 212a of the two end surfaces 212 earlier than the coating device 300 controls the coating film 400 to coat the second one 212b of the two end surfaces 212 of the electrode body 210, the two main surfaces 211, and the two side surfaces 213 of the electrode body 210. During the process of the coating film 400 coating the electrode body 210, it is necessary to fix the edge of the coating film 400 so that the coating film 400 can be fixed to the electrode body 210. The coating device 300 controls the coating film 400 to first coat the first 212a of the two end surfaces 212, so that the edge of the coating film 400 falls outside the first 212a of the two end surfaces 212, so that the electrode ear portion 201 does not interfere with the fixing operation of the edge of the coating film 400, thereby improving the coating effect of the coating film 400 on the electrode body 210. In addition, the edge of the coating film 400 falls outside the first 212a of the two end surfaces 212, which can reduce the risk of the edge of the coating film 400 being squeezed and separated from the electrode body 210 when the first 212a of the two end surfaces 212 enters the housing 100, thereby facilitating the installation of the electrode assembly 200 into the housing 100.

[0219] According to some embodiments of the present application, optionally, as shown in Figure 6, the unloading component 310 includes two unloading mechanisms 311, each unloading mechanism 311 stores and releases the material tape 401 respectively, wherein the material tape 401 corresponding to the first of the two unloading mechanisms 311 serves as the working material tape 402 and is fed into the first covering component 330, and the material tape 401 corresponding to the second of the two unloading mechanisms 311 serves as the spare material tape 405, and the covering equipment 300 also includes a switching component 340, which is used to fix the spare material tape 405 on the working material tape 402 so that the spare material tape 405 is fed into the first covering component 330 when the working material tape 402 moves.

[0220] Specifically, when the working tape 402 is about to be released from the tape 401, the switching assembly 340 can fix the released portion of the spare tape 405 to the working tape 402, so that the spare tape 405 replaces the working tape 402 in providing the covering film 400 for the first covering assembly 330. In other words, the spare tape 405 becomes the new working tape 402, and the tape 401 can be loaded in the place where the working tape 402 was originally placed to accommodate the new tape 401. The newly placed tape 401 then serves as the new spare tape 405.

[0221] With this arrangement, when the working material strip 402 is about to be released, the coating film 400 on the spare material strip 405 can be automatically fed into the first coating component 330 without stopping the machine to change the roll, thereby continuously providing the coating film 400 to the first coating component 330 and improving the coating efficiency of the coating equipment 300.

[0222] According to some embodiments of the present application, optionally, as shown in Figures 10 to 12, the switching assembly 340 includes two pressing mechanisms 341 and a material strip cutting mechanism 342, and the two pressing mechanisms 341 cooperate with each other to clamp the working material strip 402 and the spare material strip 405 from both sides of the working material strip 402 and the spare material strip 405, and the material strip cutting mechanism 342 cuts the working material strip 402 and the spare material strip 405 in the clamped state, so that the working material strip 402 and the spare material strip 405 respectively form an upstream part and a downstream part located upstream and downstream of the cutting position of the material strip cutting mechanism 342, and the two pressing mechanisms 341 connect the downstream part 403 of the working material strip 402 with the upstream part 407 of the spare material strip 405.

[0223] The two holding mechanisms 341 connect the downstream portion 403 of the working material strip 402 with the upstream portion 407 of the backup material strip 405, thereby fixing the backup material strip 405 to the working material strip 402. Before the two holding mechanisms 341 cooperate with each other to clamp the working material strip 402 and the backup material strip 405, a portion of the released portion of the working material strip 402 and a portion of the released portion of the backup material strip 405 are arranged to be located between the two holding mechanisms 341. The two holding mechanisms 341 are close to each other so as to be able to clamp the working material strip 402 and the backup material strip 405 from both sides.

[0224] The two holding mechanisms 341 can be identical or different. The installation positions of the two holding mechanisms 341 correspond to the two unwinding mechanisms 311. When the material strips 401 corresponding to the two unwinding mechanisms 311 switch between the working material strip 402 and the backup material strip 405, the two holding mechanisms 341 also interchange their actions of connecting the downstream portion 403 of the working material strip 402 with the upstream portion 407 of the backup material strip 405.

[0225] The cutting position of the working tape 402 and the spare tape 405 by the tape cutting mechanism 342 is located at the portion where the working tape 402 and the spare tape 405 are clamped by the two holding mechanisms 341. Accordingly, the tape cutting mechanism 342 can be disposed inside one of the holding mechanisms 341.

[0226] The downstream portion 403 of the working material tape 402 is the portion of the working material tape 402 closer to the first covering component 330 from the cutting location, and the upstream portion 407 of the spare material tape 405 is the portion of the spare material tape 405 farther from the first covering component 330 from the cutting location. After the downstream portion 403 of the working material tape 402 is connected to the upstream portion 407 of the spare material tape 405, the upstream portion 407 of the spare material tape 405 can replace the upstream portion 404 of the working material tape 402 to provide the covering film 400 for the first covering component 330.

[0227] With this arrangement, when the working material tape 402 is about to be released, the covering film 400 on the spare material tape 405 can automatically replace the working material tape 402 and be sent into the first covering component 330 without stopping the machine to change the roll, thereby continuously providing the covering film 400 to the first covering component 330 and improving the covering efficiency.

[0228] Furthermore, the head end of the working material strip 402 extends to the first covering assembly 330. Along the extension direction of the released portion of the working material strip 402, two holding mechanisms 341 and a material strip cutting mechanism 342 are disposed between the first covering assembly 330 and the unloading assembly 310. The switching assembly 340 also includes a material receiving mechanism 312. The released portion of the spare material strip 405 can pass between the two holding mechanisms 341 and further extend to connect with the material receiving mechanism 312.

[0229] According to some embodiments of the present application, optionally, as shown in Figures 10 to 12, the two pressing mechanisms 341 respectively include a pressing member 3411, and at least one of the two pressing mechanisms 341 includes a pressing driving member 3412, the pressing member 3411 includes a first pressing area 3414 and a second pressing area 3415 separated by a slot 3413, and the pressing driving member 3412 drives at least one pressing member 3411 so that the two first pressing areas 3414 cooperate with each other. The working material strip 402 and the spare material strip 405 are clamped, and the two second clamping areas 3415 cooperate with each other to clamp the working material strip 402 and the spare material strip 405. The material strip cutting mechanism 342 includes a cutter 3421, which is telescopically arranged in the slot 3413 of the first of the two clamping parts 3411, and extends into the slot 3413 of the second of the two clamping parts 3411 in the clamping state, thereby cutting the working material strip 402 and the spare material strip 405.

[0230] The two first pressing areas 3414 and the two second pressing areas 3415 can simultaneously clamp the working material strip 402 and the backup material strip 405, facilitating cutting by the cutter 3421. The cutter 3421 can simultaneously cut the working material strip 402 and the backup material strip 405 into two parts in a single cutting action. This arrangement improves cutting efficiency and simplifies the cutting structure.

[0231] According to some embodiments of the present application, optionally, as shown in Figures 10 to 12, the material strip cutting mechanism 342 includes an elastic member 3422, and the elastic member 3422 is configured to elastically support the first of the two pressing members 3411, so that the first of the two pressing members 3411 elastically retreats in the clamping state, thereby allowing the cutter 3421 to extend out of the slot 3413 of the first of the two pressing members 3411.

[0232] Specifically, the switching assembly 340 further includes a support bracket 3423. An elastic member 3422 is elastically supported between a first one of the two pressing members 3411 and the support bracket 3423. The cutter 3421 and the support bracket 3423 are fixed relative to each other. The two pressing members 3411 abut against each other to press and hold each other, causing the elastic member 3422 to contract, thereby causing relative movement between the first one of the two pressing members 3411 and the cutter 3421. While the two pressing members 3411 abut against each other, they remain relatively stationary, while the cutter 3421 can extend from the slot 3413 of the first one of the two pressing members 3411 into the slot 3413 of the second one of the two pressing members 3411.

[0233] With this arrangement, there is no need to provide a specific power device to drive the cutter 3421 to move relative to the two pressing members 3411, which can simplify the cutting structure.

[0234] According to some embodiments of the present application, optionally, as shown in Figures 6 and 10, the first of the two pressing mechanisms 341 is configured to simultaneously adsorb the downstream portion 403 of the working material tape 402 and the upstream portion 407 of the spare material tape 405, and the second of the two pressing mechanisms 341 is configured to apply a connecting tape at the joining position of the downstream portion 403 of the working material tape 402 and the upstream portion 407 of the spare material tape 405.

[0235] For example, the first of the two pressing mechanisms 341 can adsorb the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the spare material strip 405 by electrostatic adsorption or vacuum negative pressure adsorption.

[0236] This arrangement improves the efficiency of connecting the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the backup material strip 405. By configuring the first of the two holding mechanisms 341 to simultaneously hold the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the backup material strip 405, the stability of the joining process can be improved.

[0237] After the two holding mechanisms 341 move away from each other to release the clamping of the working material strip 402 and the backup material strip 405, the upstream portion 404 of the working material strip 402 and the downstream portion 406 of the backup material strip 405 can be moved out from between the two holding mechanisms 341. The two holding mechanisms 341 then move closer to each other and clamp the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the backup material strip 405. Furthermore, the first of the two holding mechanisms 341 is configured to simultaneously absorb the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the backup material strip 405. The two holding mechanisms 341 then move away from each other, and the second of the two holding mechanisms 341 applies a connecting tape to the junction of the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the backup material strip 405.

[0238] According to some embodiments of the present application, optionally, as shown in Figures 6 and 10 to 12, the two pressing mechanisms 341 respectively include a pressing member 3411, and the pressing member 3411 of the first of the two pressing mechanisms 341 is configured to simultaneously adsorb the downstream portion 403 of the working material tape 402 and the upstream portion 407 of the spare material tape 405, and the second of the two pressing mechanisms 341 includes a pressing drive member 3412, a rotating drive member 3417 and a glue member 3418, and the glue member 3418 is configured to carry the connecting tape, and the rotating drive member 3417 is configured to be able to rotationally drive the glue member 3418 and the pressing member 3411 of the second of the two pressing mechanisms 341 to switch between the first state and the second state. In the first state, the pressing parts 3411 in the two pressing mechanisms 341 are arranged opposite to each other. In the second state, the glue part 3418 is arranged opposite to the pressing part 3411 of the first of the two pressing mechanisms 341. The pressing drive part 3412 is configured to drive the pressing parts 3411 in the two pressing mechanisms 341 to be pressed against each other in the first state, and to drive the glue part 3418 and the pressing part 3411 of the first of the two pressing mechanisms 341 to be pressed against each other in the second state.

[0239] Such an arrangement can improve the movement stability of the pressing member 3411 and the adhesive member 3418, thereby enhancing the cutting effect and the connection effect of the connecting tape.

[0240] Optionally, the two pressing mechanisms 341 respectively include a pressing member 3411, the pressing member 3411 of the second of the two pressing mechanisms 341 is configured to simultaneously absorb the downstream portion 403 of the working material belt 402 and the upstream portion 407 of the spare material belt 405, and the first of the two pressing mechanisms 341 includes a pressing driving member 3412, a rotating driving member 3417 and a glue sticking member 3418, the glue sticking member 3418 is configured to carry the connecting tape, and the rotating driving member 3417 is configured to be able to rotationally drive the glue sticking member 3418 of the first of the two pressing mechanisms 341. 418 and the pressing member 3411 switch between a first state and a second state. In the first state, the pressing members 3411 in the two pressing mechanisms 341 are arranged relative to each other. In the second state, the adhesive member 3418 is arranged relative to the pressing member 3411 of the second of the two pressing mechanisms 341. The pressing drive member 3412 is configured to drive the pressing members 3411 in the two pressing mechanisms 341 to be pressed against each other in the first state, and to drive the adhesive member 3418 and the pressing member 3411 of the second of the two pressing mechanisms 341 to be pressed against each other in the second state.

[0241] According to some embodiments of the present application, optionally, as shown in Figure 6, the unloading component 310 corresponding to the working material belt 402 is also configured to collect the upstream part 404 of the working material belt 402, and the switching component 340 also includes a material collecting mechanism 312, which is used to collect the downstream part 406 of the spare material belt 405.

[0242] The unwinding assembly 310 can move in the opposite direction of the release tape 401 so as to collect the upstream portion 404 of the working tape 402. For example, the unwinding assembly 310 can release the tape 401 on the tape roll by rotating, and the unwinding assembly 310 can also collect the tape 401 on the tape roll by rotating in the opposite direction.

[0243] The downstream portion 406 of the spare material strip 405, which is located at one end away from the unwinding assembly 310, can be connected to a receiving mechanism 312, so that the receiving mechanism 312 can collect the downstream portion 406 of the spare material strip 405 by moving. For example, the receiving mechanism 312 includes a roller, and the downstream portion 406 of the spare material strip 405, which is located at one end away from the unwinding assembly 310, can be wound around the roller, and the roller can collect the downstream portion 406 of the spare material strip 405 by rotating.

[0244] Such an arrangement can improve the degree of automation of the coating equipment 300.

[0245] According to some embodiments of the present application, optionally, as shown in Figures 6, 10 to 12, in the process of the upstream part 404 of the working material belt 402 and the downstream part 406 of the spare material belt 405 being collected, the two pressing mechanisms 341 are in a separated state, and the two pressing mechanisms 341 are also configured to respectively adsorb the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405, and after the upstream part 404 of the working material belt 402 and the downstream part 406 of the spare material belt 405 are collected, the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405 are transferred to the first of the two pressing mechanisms 341.

[0246] After the working material tape 402 and the spare material tape 405 are cut off from the cutting position, the two pressing mechanisms 341 can respectively adsorb the downstream part 403 of the working material tape 402 and the upstream part 407 of the spare material tape 405 and move away from each other, so that after the two pressing mechanisms 341 release the clamping of the working material tape 402 and the spare material tape 405, the downstream part 403 of the working material tape 402 and the upstream part 407 of the spare material tape 405 will not loosen or dislocate relative to the joining position, so as to improve the accuracy of connecting the downstream part 403 of the working material tape 402 and the upstream part 407 of the spare material tape 405.

[0247] According to some embodiments of the present application, optionally, as shown in Figures 6 and 10 to 12, the two pressing mechanisms 341 respectively include a pressing member 3411, and at least one of the two pressing mechanisms 341 includes a pressing drive 3412, the pressing member 3411 includes a first pressing area 3414 and a second pressing area 3415 spaced apart from each other, the pressing drive 3412 drives at least one pressing member 3411 so that the two first pressing areas 3414 cooperate with each other to clamp the working material tape 402 and the spare material tape 405, and the two second pressing areas 3415 cooperate with each other to clamp the working material tape 402 and the spare material tape 405, and the material tape cutting mechanism 342 cuts the working material tape 402 and the spare material tape 405 in the spaced area between the first pressing area 3414 and the second pressing area 3415. After the cutting is completed, the clamping drive 3412 drives the two clamping members 3411 to separate from each other, and the two clamping members 3411 respectively adsorb the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405. After the upstream part 404 of the working material belt 402 and the downstream part 406 of the spare material belt 405 are collected, the clamping drive 3412 drives the two clamping members 3411 to separate from each other, and the first of the two pressing mechanisms 341 simultaneously adsorbs the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405.

[0248] With this arrangement, the downstream portion 403 of the working tape 402 and the upstream portion 407 of the spare tape 405 can be stably positioned to facilitate connection of the downstream portion 403 of the working tape 402 and the upstream portion 407 of the spare tape 405 .

[0249] According to some embodiments of the present application, optionally, as shown in Figures 6 and 13, the coating device 300 also includes a positioning component 350, which is configured to clamp and fix the electrode coating 240 output by the first coating component 330 from the outside of the two main coating areas 410.

[0250] By providing a positioning assembly 350 to replace the first coating assembly 330 in positioning the electrode assembly 200, the electrode coating 240 can be stably separated from the first coating assembly 330. By configuring the positioning assembly 350 to clamp and fix the electrode coating 240 output from the first coating assembly 330 from the outside of the two main coating regions 410, the positioning assembly 350 can avoid the side surface 213, the side coating region 430, the second of the two end surfaces 212b, and the end coating region 440, thereby reducing interference of the positioning assembly 350 with the subsequent coating process.

[0251] Optionally, as shown in FIG13 , the positioning assembly 350 includes a movable bracket 351, a rotary positioning motor, a cylinder, and a clamping arm 352. The cylinder can drive the two clamping arms 352 to clamp the second coating assembly 370. The clamping arms 352 can be rotatably connected to the movable bracket 351, and the rotary positioning motor can drive the clamping arms 352 to rotate relative to the movable bracket 351, thereby driving the electrode package 240 to rotate. For example, in the initial stage of the electrode package 240 being clamped by the clamping arms 352, the direction of movement of the electrode package 240 between the two clamping arms 352 can be parallel to the second direction D2 of the electrode package 240. Thereafter, the rotary positioning motor can drive the clamping arms 352 to rotate 90°, so that the second direction D2 of the electrode package 240 is perpendicular to the direction of movement of the electrode package 240 between the two clamping arms 352.

[0252] According to some embodiments of the present application, optionally, as shown in Figures 5, 7 and 13, the coating film 400 includes a side coating area 430 connected to the main coating area 410, the coating equipment 300 also includes a second coating component 370, the positioning component 350 transfers the electrode coating body 240 to the second coating component 370, and the second coating component 370 is configured to contact the transmission side coating area 430 and coat the side surface 213.

[0253] The positioning assembly 350 can play a role in transportation, thereby driving the electrode package 240 toward the second package assembly 370, so that the second package assembly 370 can cover the side package area 430 on the side surface 213. The second package assembly 370 can drive the side package area 430 toward the side surface 213 so that the side package area 430 gradually contacts and covers the side surface 213.

[0254] The second coating component 370 can adjust the relative position between the electrode assembly 200 and the side coating region 430. By providing the second coating component 370 to coat the side coating region 430 on the side surface 213, the coating effect of the coating film 400 on the electrode body 210 can be improved.

[0255] According to some embodiments of the present application, optionally, as shown in Figures 14 to 17, the second covering assembly 370 includes a side pressure plate 371, a first pressure plate transmission mechanism 372 and a second pressure plate transmission mechanism 373, the first pressure plate transmission mechanism 372 is used to transmit the side pressure plate 371 along the first direction D1, so that the side pressure plate 371 pushes the side covering area 430 to bend toward the side 213 relative to the main covering area 410, and the second pressure plate transmission mechanism 373 is used to transmit the side pressure plate 371 along the third direction D3, so that the side pressure plate 371 presses the side covering area 430 on the side 213.

[0256] After the main covering region 410 covers the main surface 211 of the electrode body 210, the side covering region 430 and the main covering region 410 may be coplanar or approximately coplanar. Movement of the side pressure plate 371 along the first direction D1 can push the side covering region 430 to bend relative to the main covering region 410. During the bending process, the side covering region 430 gradually approaches the side surface 213 of the electrode body 210. After the side pressure plate 371 pushes the side covering region 430 to bend relative to the main covering region 410 toward the side surface 213, in the third direction D3, the side pressure plate 371 and the side surface 213 of the electrode body 210 may be positioned opposite and spaced apart from each other, with the side covering region 430 positioned between the side pressure plate 371 and the side surface 213 of the electrode body 210. At this time, the side pressing plate 371 moves along the third direction D3 toward the electrode body 210 to press the side covering region 430 against the side surface 213 of the electrode body 210 , so that the side covering region 430 covers the side surface 213 of the electrode body 210 .

[0257] This configuration allows the second covering component 370 to smoothly connect the action of bending the side covering area 430 and the action of covering the side covering area 430 on the side surface 213, which is beneficial to simplifying the action and structure of the second covering component 370 and improving the covering efficiency.

[0258] Alternatively, as shown in Figures 14 to 17, each main coating region 410 may be connected to two side coating regions 430. The two side coating regions 430 connected to the first of the two main coating regions 410 may be designated as B1 and B2, and the two side coating regions 430 connected to the second of the two main coating regions 410 may be designated as B3 and B4. The second coating assembly 370 includes four side pressure plates 371 corresponding to the four side coating regions 430. The four side pressure plates 371 may be designated as C1, C2, C3, and C4. C1, C2, C3, and C4 are used to bend B1, B2, B3, and B4 toward the side surface 213 and press them against the side surface 213 of the electrode body 210.

[0259] Before the four side pressing plates 371 move in the first direction D1, the four side covering areas 430 are located between the four side pressing plates 371. The movement of C1 and C2 in the first direction D1 is opposite to the movement of C3 and C4 in the first direction D1, so that C1 and C2 are brought closer to C3 and C4. This allows C1 and C2 to bend B1 and B2 toward the side surface 213, and C3 and C4 to bend B3 and B4 toward the side surface 213, respectively.

[0260] Before C1 and C2 move along the third direction D3, C1 and C2 are spaced apart from and opposite to the two side surfaces 213, with B1 located between C1 and one side surface 213, and B2 located between C2 and the other side surface 213. The direction in which C1 moves toward the electrode body 210 along the third direction D3 is opposite to the direction in which C2 moves toward the electrode body 210 along the third direction D3, so that C1 and C2 approach each other and press B1 and B2, respectively, against the side surfaces 213 of the electrode body 210. Before C3 and C4 move along the third direction D3, C3 and C4 are spaced apart from and opposite to the two side surfaces 213, with B3 located between C3 and one side surface 213, and B4 located between C4 and the other side surface 213. The direction in which C3 moves toward the electrode body 210 along the third direction D3 is opposite to the direction in which C4 moves toward the electrode body 210 along the third direction D3, so that C3 and C4 approach each other, so that C3 and C4 press B3 and B4 on the side 213 of the electrode body 210 respectively.

[0261] Furthermore, each main covering region 410 is connected to two side covering regions 430. One of the two side covering regions 430 connected to the first of the two main covering regions 410 and one of the two side covering regions 430 connected to the second of the two main covering regions 410 jointly cover one side surface 213 of the electrode body 210. The other of the two side covering regions 430 connected to the first of the two main covering regions 410 and the other of the two side covering regions 430 connected to the second of the two main covering regions 410 jointly cover the other side surface 213 of the electrode body 210. Furthermore, the two side covering regions 430 covering the same side surface 213 of the electrode body 210 may overlap and partially overlap.

[0262] According to some embodiments of the present application, optionally, as shown in Figures 14 to 17, the covering film 400 includes an end covering area 440 connected to the main covering area 410, and the second covering component 370 is configured to contact the transmission end covering area 440 and cover the second one 212b of the two end surfaces 212.

[0263] The second coating component 370 can adjust the relative position between the electrode assembly 200 and the end coating region 440. By providing the second coating component 370 to coat the end coating region 440 on the second end surface 212b of the two end surfaces 212, the coating effect of the coating film 400 on the electrode body 210 can be improved.

[0264] According to some embodiments of the present application, optionally, as shown in Figures 14 to 17, the second covering assembly 370 includes an end face pressure plate 374, a first pressure plate transmission mechanism 372 and a third pressure plate transmission mechanism 375, the first pressure plate transmission mechanism 372 is used to transmit the end face pressure plate 374 along the first direction D1, so that the end face pressure plate 374 pushes the end covering area 440 to bend relative to the main covering area 410 toward the second one 212b of the two end faces 212, and the third pressure plate transmission mechanism 375 is used to transmit the end face pressure plate 374 along the second direction D2, so that the end face pressure plate 374 presses the end covering area 440 on the second one 212b of the two end faces 212.

[0265] After the main coating region 410 is coated on the main surface 211 of the electrode body 210, the end coating region 440 and the main coating region 410 may be coplanar or approximately coplanar. The end surface pressure plate 374 moves along the first direction D1 to push the end coating region 440 to bend relative to the main coating region 410. During the bending process, the end coating region 440 gradually approaches the second one 212b of the two end surfaces 212. After the end surface pressure plate 374 pushes the end coating region 440 to bend relative to the main coating region 410 toward the second one 212b of the two end surfaces 212, the end surface pressure plate 374 and the second one 212b of the two end surfaces 212 may be disposed opposite and spaced apart from each other in the second direction D2, with the end coating region 440 located between the end surface pressure plate 374 and the second one 212b of the two end surfaces 212. At this time, the end surface pressing plate 374 moves along the second direction D2 toward the electrode body 210 to press the end covering region 440 against the second one 212 b of the two end surfaces 212 , so that the end covering region 440 covers the second one 212 b of the two end surfaces 212 .

[0266] Optionally, as shown in Figures 14 to 17 , each main covering region 410 is connected to an end covering region 440, and the second covering assembly 370 includes two end surface pressure plates 374. The two end surface pressure plates 374 can be moved in a first direction D1 to move closer to each other, thereby causing the two end covering regions 440 to bend toward the second one 212b of the two end surfaces 212. The two end surface pressure plates 374 can be moved in a second direction D2 to cause the two end covering regions 440 to cover the second one 212b of the two end surfaces 212.

[0267] In some embodiments, the two end covering regions 440 may overlap and partially connect with each other. One of the two end surface pressing plates 374 may first bend one end covering region 440 toward the second one 212 b of the two end surfaces 212 and press it onto the second one 212 b of the two end surfaces 212. The other of the two end surface pressing plates 374 may then bend the other end covering region 440 toward the second one 212 b of the two end surfaces 212 and press it onto the second one 212 b of the two end surfaces 212.

[0268] In some embodiments, the second pressure plate transmission mechanism 373 includes a first pressure plate cylinder 376, and the third pressure plate transmission mechanism 375 includes a second pressure plate cylinder 3761. The second pressure plate cylinder 3761 is used to provide power for driving the end pressure plate 374 in the second direction D2, and the first pressure plate cylinder 376 is used to provide power for driving the side pressure plate 371 in the third direction D3. In other embodiments, the second pressure plate transmission mechanism 373 and the third pressure plate transmission mechanism 375 can be arranged in a coordinated manner. For example, the second pressure plate transmission mechanism 373 and the third pressure plate transmission mechanism 375 share a cylinder to simultaneously provide power for driving the end pressure plate 374 in the second direction D2 and the side pressure plate 371 in the third direction D3. This allows the side pressure plate 371 to move in the third direction D3 toward the side enveloping area 430 while the end pressure plate 374 moves in the second direction D2 toward the end enveloping area 440. This can reduce enveloping time and improve enveloping efficiency.

[0269] Optionally, the end pressure plate 374 and the side pressure plate 371 do not move relative to each other in the first direction D1. The first pressure plate transmission mechanism 372 can simultaneously transmit the end pressure plate 374 and the side pressure plate 371 in the first direction D1. This improves the coating efficiency. Furthermore, when the first pressure plate transmission mechanism 372 transmits the end pressure plate 374 in the first direction D1, it can simultaneously transmit the third pressure plate transmission mechanism 375 in the first direction D1. When the first pressure plate transmission mechanism 372 transmits the side pressure plate 371 in the first direction D1, it can simultaneously transmit the second pressure plate transmission mechanism 373 in the first direction D1.

[0270] Optionally, as shown in Figures 14 to 17, the first pressure plate transmission mechanism 372 is provided with a pressure plate transmission motor 377, which is used to provide power for driving the end pressure plate 374 and the side pressure plate 371 in the first direction D1. Furthermore, the pressure plate transmission motor 377 is used to drive the second pressure plate transmission mechanism 373, the third pressure plate transmission mechanism 375, the end pressure plate 374, and the side pressure plate 371 in the first direction D1.

[0271] Optionally, as shown in Figures 14 to 17, the second covering assembly 370 includes a first pressure plate bracket 378 and a second pressure plate bracket 379. The second pressure plate bracket 379 is slidably disposed on the first pressure plate bracket 378 along the first direction D1. The first pressure plate transmission mechanism 372 is disposed on the first pressure plate bracket 378 and is in transmission connection with the second pressure plate bracket 379 to drive the second pressure plate bracket 379 to move relative to the first pressure plate bracket 378 along the first direction D1. The side pressure plate 371, the second pressure plate transmission mechanism 373, the end pressure plate 374, and the third pressure plate transmission mechanism 375 can be disposed on the second pressure plate bracket 379 and move synchronously with the second pressure plate bracket 379 along the first direction D1.

[0272] Furthermore, the first pressing plate bracket 378 and the second pressing plate bracket 379 are relatively fixedly arranged.

[0273] Optionally, as shown in Figures 14 to 17, the end pressure plate 374 is provided with an adjustable end stopper 3741. The end stopper 3741 is used to abut the main cladding region 410 to limit the position of the electrode assembly 200 in the first direction D1. By adjusting the position of the end stopper 3741 on the end pressure plate 374, it can be used to accommodate electrode assemblies 200 of different sizes, thereby improving the compatibility of the end pressure plate 374 with electrode assemblies 200 of different sizes. Furthermore, the end stopper 3741 is provided with a circular arc surface facing the main cladding region 410, thereby improving the fit with the main cladding region 410.

[0274] Optionally, as shown in Figures 14 to 17, the side pressure plate 371 is provided with an adjustable side limit block 3711. The side limit block 3711 is used to abut the main coating area 410 to limit the electrode assembly 200 in the first direction D1. By adjusting the position of the side limit block 3711 on the side pressure plate 371, it can be matched with electrode assemblies 200 of different sizes, thereby improving the compatibility of the side pressure plate 371 with electrode assemblies 200 of different sizes. Furthermore, the side limit block 3711 is provided with a circular arc surface facing the main coating area 410, thereby improving the fit with the main coating area 410.

[0275] According to some embodiments of the present application, optionally, as shown in Figures 14 to 17 , the first platen transmission mechanism 372 includes a platen transmission motor 377, a first platen bracket 378, and a second platen bracket 379. The platen transmission motor 377 is disposed on the first platen bracket 378 and drives the second platen bracket 379 to move relative to the first platen bracket 378. The second platen transmission mechanism 373 includes a first platen cylinder 376, which is disposed on the second platen bracket 379 and drives the side platen 371 to move relative to the second platen bracket 379. The third platen transmission mechanism 375 includes a second platen cylinder 3761, which is disposed on the second platen bracket 379 and drives the end platen 374 to move relative to the second platen bracket 379.

[0276] Such an arrangement can improve the freedom of movement of the side pressure plate 371 and the end pressure plate 374, which is beneficial to improving the covering effect.

[0277] According to some embodiments of the present application, optionally, as shown in Figures 5, 7, 8 and 18, the coating film 400 also includes a side coating area 430 and an end coating area 440 connected to the main coating area 410, wherein the side coating area 430 is coated on the side surface 213, and the end coating area 440 is coated on the second one 212b of the two end surfaces 212, and the coating device 300 also includes a first tape attaching component 380, which is used to drive the electrode assembly 200 and the first tape 510 to move relative to each other, and the first tape 510 includes a first part and a second part connected to each other, and the first tape attaching component 380 is configured to attach the first part 511 of the first tape 510 to the side coating area 430 and attach the second part 512 of the first tape 510 to the end coating area 440 at the corner formed by the side surface 213 and the second one 212b of the two end surfaces 212.

[0278] The first adhesive tape 510 can connect the side covering area 430 and the end covering area 440 together, so that the side covering area 430 and the end covering area 440 can be fixed relative to the electrode body 210 , thereby improving the coating firmness of the covering film 400 on the electrode body 210 .

[0279] Specifically, after the end coating region 440 and the side coating region 430 are pressed against the battery body, the first tape applying assembly 380 can drive the electrode assembly 200 to move so that the side coating region 430 and the first portion 511 of the first tape 510 are positioned relative to each other. The first tape applying assembly 380 then drives the electrode assembly 200 to continue moving so that the first portion 511 of the first tape 510 is attached to the side coating region 430. Thereafter, the first tape applying assembly 380 can drive the electrode assembly 200 to rotate toward the second portion 512 of the first tape 510 so that the second portion 512 of the first tape 510 gradually approaches and is ultimately attached to the end coating region 440.

[0280] Alternatively, the first tape applying assembly 380 may drive the electrode assembly 200 to move so that the end coating region 440 and the second portion 512 of the first tape 510 are disposed opposite each other. The first tape applying assembly 380 then drives the electrode assembly 200 to continue moving so that the second portion 512 of the first tape 510 is attached to the end coating region 440. Thereafter, the first tape applying assembly 380 may drive the electrode assembly 200 to rotate toward the first portion 511 of the first tape 510 so that the first portion 511 of the first tape 510 gradually approaches and is ultimately attached to the side coating region 430.

[0281] Furthermore, the side covering regions 430 connected to the two main covering regions 410 jointly cover the same side surface 213 of the electrode body 210, and the first adhesive tape 510 can function to connect the two side covering regions 430 covering the same side surface 213 of the electrode body 210. The end covering regions 440 connected to the two main covering regions 410 jointly cover the second end surface 212b of the two end surfaces 212, and the first adhesive tape 510 can function to connect the two end covering regions 440 covering the second end surface 212b of the two end surfaces 212.

[0282] Optionally, as shown in Figures 19 to 24, the first adhesive tape applying assembly 380 further includes a first cutting mechanism 383, a first adhesive dispensing mechanism 386, and a first adhesive pulling mechanism 382. The first adhesive pulling mechanism 382 is used to clamp and pull the leading end of the release portion of the first adhesive tape roll 384, the first cutting mechanism 383 is used to cut the first adhesive tape 510 from the release portion of the first adhesive tape roll 384, and the first adhesive dispensing mechanism 386 is used to suck the first adhesive tape 510 and apply it to the covering film 400.

[0283] Optionally, as shown in Figures 19 to 24, the first adhesive tape applying assembly 380 further includes a first adhesive feeding mechanism 387, which is used to convey the released portion of the first adhesive tape roll 384 for cutting by the first cutting mechanism 383. Furthermore, the first adhesive feeding mechanism 387 includes a roller (not labeled) for conveying the released portion of the first adhesive tape roll 384.

[0284] According to some embodiments of the present application, optionally, as shown in Figures 19 to 24, the first tape attaching assembly 380 includes a first unwinding mechanism 381, a first glue pulling mechanism 382 and a first cutting mechanism 383, the first unwinding mechanism 381 is configured to place and release the first tape roll 384, the first glue pulling mechanism 382 is configured to clamp and pull the head end of the released portion of the first tape roll 384, and the first cutting mechanism 383 is configured to cut the first tape 510 from the released portion of the first tape roll 384.

[0285] Such an arrangement is conducive to automatically providing the first adhesive tape 510 .

[0286] According to some embodiments of the present application, optionally, as shown in Figures 19 to 24, the first glue pulling mechanism 382 includes a first glue clamping cylinder 3821, a first glue pulling motor 3822 and a first glue clamping component 3823, the first glue clamping cylinder 3821 is used to drive the first glue clamping component 3823 to clamp the head end of the release part, and the first glue pulling motor 3822 is used to drive the first glue clamping component 3823 to move to pull the release part.

[0287] The first adhesive pulling motor 3822 drives the first adhesive clamping member 3823 to move to pull the release portion, thereby extending the release portion of the first adhesive tape roll 384 , and the release portion of the first adhesive tape roll 384 is stretched for easy cutting.

[0288] According to some embodiments of the present application, optionally, as shown in Figures 19 to 24, the first unwinding mechanism 381 and the first cutting mechanism 383 are two corresponding groups. The first tape applying assembly 380 includes a switching mechanism 385, which includes a roll holder 3851 and a switching motor 3852. The two groups of the first unwinding mechanism 381 and the first cutting mechanism 383 are arranged on the roll holder 3851. The switching motor 3852 drives the roll holder 3851 to rotate around a predetermined rotation axis, so that the two groups of the first unwinding mechanism 381 and the first cutting mechanism 383 can switch between a standby position and a working position for the first glue pulling mechanism 382 and the first cutting mechanism 383 to operate. The rotation axis is perpendicular to the plane where the release portion is located.

[0289] One first unwinding mechanism 381 and one first cutting mechanism 383 can form a group. Two first unwinding mechanisms 381 and two first cutting mechanisms 383 can form two corresponding groups. This arrangement facilitates rapid rewinding of the first tape roll 384 and improves rewinding efficiency. Specifically, each time a rewind is changed, the switching motor 3852 drives the reel holder 3851 to rotate 180°.

[0290] According to some embodiments of the present application, optionally, as shown in Figures 19 to 24, the first adhesive tape attaching assembly 380 includes a first adhesive dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first cutting mechanism 383 includes a first pressing block 3831, a first cutter 3832, and a first cutting cylinder 3833. The first pressing block 3831 and the first cutter 3832 are relatively fixedly arranged. The first cutting cylinder 3833 is configured to drive the first pressing block 3831 to press the release portion onto the first adhesive dispensing mechanism 386, and drive the first cutter 3832 to cut the first adhesive tape 510 from the release portion.

[0291] The first pressing block 3831 can be provided to press and position the released portion of the first tape roll 384, thereby improving the stability of the cutting process.

[0292] According to some embodiments of the present application, as shown in Figures 19 to 24, the first adhesive tape applying assembly 380 optionally includes a first adhesive dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first adhesive dispensing mechanism 386 includes a first adhesive dispensing component 3861, a first adhesive dispensing motor 3862, a second adhesive dispensing motor 3863, a first adhesive dispensing bracket 3864, and a second adhesive dispensing bracket 3865. The first adhesive dispensing component 3861 is used to absorb the first adhesive tape 510. The first adhesive dispensing motor 3862 is disposed on the first adhesive dispensing bracket 3864 and drives the second adhesive dispensing bracket 3865 to move above the release portion of the first adhesive tape roll 384. The second adhesive dispensing motor 3863 is disposed on the second adhesive dispensing bracket 3865 and drives the first adhesive dispensing component 3861 toward and away from the plane where the release portion of the first adhesive tape roll 384 is located.

[0293] Such an arrangement can improve the movement freedom of the first adhesive removing member 3861 , making it easier to absorb and transfer the first adhesive tape 510 .

[0294] According to some embodiments of the present application, as shown in Figures 19 to 24 , the first adhesive dispensing member 3861 optionally includes a first adhesive dispensing sub-portion 3866 and a second adhesive dispensing sub-portion 3867. The first adhesive dispensing sub-portion 3866 is used to absorb the first portion 511 of the first adhesive tape 510 and attach it to the side covering area 430. The second adhesive dispensing sub-portion 3867 is used to absorb the second portion 512 of the first adhesive tape 510 and attach it to the end covering area 440.

[0295] Such an arrangement can improve the continuity of the glue taking action and the glue applying action.

[0296] Optionally, at least one of the first adhesive dispensing sub-portion 3866 and the second adhesive dispensing sub-portion 3867 has an adsorption surface for contacting and adsorbing the first adhesive tape 510. The first adhesive dispensing sub-portion 3866 and the second adhesive dispensing sub-portion 3867 are configured to move relative to each other in a direction perpendicular to the adsorption surface, thereby bending the first adhesive tape 510 adsorbed on the first adhesive dispensing member 3861. For example, one of the first adhesive dispensing sub-portion 3866 and the second adhesive dispensing sub-portion 3867 can be driven to move in a direction perpendicular to the adsorption surface.

[0297] According to some embodiments of the present application, as shown in Figures 19 to 24 , the first adhesive dispensing sub-unit 3866 is optionally a telescopic member. The second adhesive dispensing motor 3863 drives the first adhesive dispensing member 3861 along the third direction D3. The first adhesive dispensing sub-unit 3866 presses the first portion 511 of the first adhesive tape 510 against the side covering area 430 and contracts, allowing the second adhesive dispensing sub-unit 3867 to continue moving along the third direction D3 and adhere to the end covering area 440, thereby attaching the second portion 512 of the first adhesive tape 510 to the end covering area 440. Alternatively, the second adhesive dispensing sub-unit 3867 is a telescopic member. The second glue-picking motor 3863 drives the first glue-picking component 3861 along the second direction D2, and the second sub-glue-picking portion 3867 presses the second portion 512 of the first adhesive tape 510 onto the end covering area 440 and contracts, so that the first sub-glue-picking portion 3866 can continue to move along the second direction D2 and adhere to the side covering area 430, thereby attaching the first portion 511 of the first adhesive tape 510 to the side covering area 430.

[0298] The telescopic member can be telescopic. For example, the telescopic member is elastic and can be elastically telescopic and telescopic under pressure.

[0299] This configuration improves the structural flexibility of the first adhesive dispensing member 3861, enabling it to adaptively adjust its shape according to the shape of the electrode body 210, thereby achieving diverse adhesive application operations. Specifically, when the first adhesive dispensing portion 3866 and the second adhesive dispensing portion 3867 absorb the first adhesive tape 510, the first adhesive tape 510 assumes a planar shape. Compression of one of the first adhesive dispensing portion 3866 and the second adhesive dispensing portion 3867 causes a misalignment between the first adhesive dispensing portion 3866 and the second adhesive dispensing portion 3867, thereby causing the first adhesive tape 510 to bend so that it can be simultaneously applied to the end covering region 440 and the side covering region 430.

[0300] According to some embodiments of the present application, as shown in Figures 19 to 24, the first cutting mechanism 383 is optionally configured to cut two first adhesive tapes 510 from the release portion. Two first adhesive dispensing members 3861 are provided, each of which absorbs a corresponding first adhesive tape 510. The first tape applying assembly 380 includes a first adhesive dispensing mechanism 386, which is configured to absorb and remove the first adhesive tape 510. The first adhesive dispensing mechanism 386 includes a first adhesive dispensing member 3861, a first adhesive dispensing motor 3862, a second adhesive dispensing motor 3863, a first adhesive dispensing bracket 3864, a second adhesive dispensing bracket 3865, a third adhesive dispensing bracket 3868, and an adhesive dispensing cylinder 3869. The first adhesive dispensing member 3861 is configured to absorb the first adhesive tape 510. The first adhesive dispensing motor 3862 is disposed on the first adhesive dispensing bracket 3864 and drives the second adhesive dispensing bracket 3865 to move above the release portion of the first tape roll 384. The second glue dispensing motor 3863 is mounted on the second glue dispensing bracket 3865 and drives the third glue dispensing bracket 3868 and the two first glue dispensing members 3861 toward and away from the plane where the release portion of the first tape roll 384 is located. The glue dispensing cylinder 3869 is mounted on the third glue dispensing bracket 3868 and is configured to drive the two first glue dispensing members 3861 away from each other so that the two first glue dispensing members 3861 correspond to two corners of the electrode assembly 200 spaced apart along the third direction D3.

[0301] For example, the first cutting mechanism 383 is provided with two first cutters 3832 corresponding to the same release portion, and the first cutting cylinder 3833 drives the two first cutters 3832 to move synchronously, so that the two first cutters 3832 can cut out two first tapes 510 each time from the same release portion.

[0302] With this arrangement, the first adhesive removal mechanism 386 can absorb and remove the two first adhesive tapes 510 corresponding to each electrode assembly 200, and then simultaneously attach two first adhesive tapes 510 to the two corners of the electrode assembly 200 spaced apart along the third direction D3, thereby improving the adhesive application efficiency.

[0303] According to some embodiments of the present application, optionally, as shown in Figures 5, 7, 8 and 18, the coating device 300 also includes a second tape attaching component 390, which is used to drive the electrode assembly 200 and the second tape 520 to move relative to each other, and the second tape 520 includes a first part and a second part connected to each other, and the second tape attaching component 390 is configured to attach the first part 521 of the second tape 520 to the main coating area 410 at the corner formed by the side surface 213 and the main surface 211, and attach the second part 522 of the second tape 520 to the side coating area 430.

[0304] Before attaching the second adhesive tape 520, at least a portion of the side coating region 430 is connected only to one of the two main coating regions 410 and is not connected to the other of the two main coating regions 410. The second adhesive tape 520 can connect the side coating region 430 and the other of the main coating regions 410 together, so that the side coating region 430 and the main coating region 410 can be fixed relative to the electrode body 210, thereby improving the coating firmness of the coating film 400 on the electrode body 210.

[0305] For example, after the side wrapping area 430 is pressed against the battery body, the second tape attaching assembly 390 can drive the electrode assembly 200 to move, so that the first part 521 of the second tape 520 gradually approaches and is finally attached to the main wrapping area 410, and then the second tape attaching assembly 390 can drive the electrode assembly 200 to rotate toward the second part 522 of the second tape 520, so that the second part 522 of the second tape 520 gradually approaches and is finally attached to the side wrapping area 430.

[0306] Optionally, as shown in Figures 25 to 31, the second adhesive tape applying assembly 390 further includes a second cutting mechanism 393, a second adhesive dispensing mechanism 395, and a second adhesive pulling mechanism 392. The second adhesive pulling mechanism 392 is used to pull out the second adhesive tape 520, the second cutting mechanism 393 is used to cut the second adhesive tape 520 from the released portion of the second adhesive tape roll 396, and the second adhesive dispensing mechanism 395 is used to suck up the second adhesive tape 520 and apply it to the covering film 400.

[0307] 25 to 31 , the second adhesive tape applying assembly 390 further includes a second adhesive feeding mechanism 397 for conveying the released portion of the second adhesive tape roll 396 for cutting by the second cutting mechanism 393. Furthermore, the second adhesive feeding mechanism 397 includes a roller (not labeled) for conveying the released portion of the second adhesive tape roll 396.

[0308] According to some embodiments of the present application, optionally, as shown in Figures 25 to 31, the number of the first parts 521 of the second tape 520 is two, and they are located at both ends of the second part 522 of the second tape 520, and the second tape attaching component 390 is configured to attach the two first parts of the second tape 520 to the corresponding one of the two main covering areas 410 respectively.

[0309] Such a configuration can increase the contact area between the second adhesive tape 520 and the covering film 400 , thereby improving the fixing effect of the opposite covering area 430 .

[0310] Furthermore, the side covering regions 430 connected to the two main covering regions 410 jointly cover the same side surface 213 of the electrode body 210 , and the second tape 520 can connect the two side covering regions 430 covering the same side surface 213 of the electrode body 210 .

[0311] According to some embodiments of the present application, as shown in Figures 25 to 31, the second tape applying assembly 390 optionally includes a second unwinding mechanism 391, a second adhesive tape pulling mechanism 392, and a second cutting mechanism 393. The second unwinding mechanism 391 is configured to place and release the second adhesive tape roll 396. The second adhesive tape pulling mechanism 392 is configured to clamp and pull the leading end of the released portion of the second adhesive tape roll 396. The second cutting mechanism 393 is configured to cut the second adhesive tape 520 from the released portion of the second adhesive tape roll 396.

[0312] Such an arrangement is conducive to automatically providing the second adhesive tape 520 .

[0313] According to some embodiments of the present application, optionally, as shown in Figures 25 to 31, the second adhesive pulling mechanism 392 includes a second adhesive clamping cylinder 3921, a second adhesive pulling motor 3922, and a second adhesive clamping member 3923. The second adhesive clamping cylinder 3921 is used to drive the second adhesive clamping member 3923 to clamp the head end of the release portion of the second adhesive tape roll 396, and the second adhesive pulling motor 3922 is used to drive the second adhesive clamping member 3923 to move to pull the release portion of the second adhesive tape roll 396.

[0314] The second adhesive pulling motor 3922 drives the second adhesive clamping member 3923 to move to pull the release portion, thereby extending the release portion of the second adhesive tape roll 396 , and the release portion of the second adhesive tape roll 396 is stretched for easy cutting.

[0315] According to some embodiments of the present application, optionally, as shown in Figures 25 to 31, the second unwinding mechanism 391 and the second cutting mechanism 393 are two corresponding groups, and are spaced apart along the width direction D4 of the release portion. The second tape applying assembly 390 includes a glue pulling bracket 394, a glue pulling position shifting cylinder 3941, and a glue pulling position shifting bracket 3942. The glue pulling position shifting cylinder 3941 is disposed on the glue pulling bracket 394, and the second glue pulling mechanism 392 is disposed on the glue pulling position shifting bracket 3942. The glue pulling position shifting cylinder 3941 is configured to drive the glue pulling position shifting bracket 3942 to move along the spacing direction D5 between the two second unwinding mechanisms 391, so that the second glue pulling mechanism 392 can switch between a standby position and a working position for the second glue pulling mechanism 392 to operate. A set of the second unwinding mechanism 391 and the second cutting mechanism 393 are each provided at the standby position and the working position.

[0316] One second unwinding mechanism 391 and one second cutting mechanism 393 can form a group. Two second unwinding mechanisms 391 and two second cutting mechanisms 393 can form two corresponding groups. By providing two sets of second unwinding mechanisms 391 and second cutting mechanisms 393, interference with the adhesive tape application process caused by the rewinding operation of the second adhesive tape roll 396 can be reduced, thereby improving adhesive tape application efficiency. Furthermore, the two sets of second unwinding mechanisms 391 and second cutting mechanisms 393 are arranged in layers along the height direction of the second adhesive tape application assembly 390.

[0317] By setting the glue pulling and shifting cylinder 3941 to drive the glue pulling and shifting bracket 3942 to move along the spacing direction D5 of the two second unwinding mechanisms 391, the position of the glue pulling mechanism can correspond to the position of a group of second unwinding mechanisms 391 and second cutting mechanisms 393 that are working, thereby facilitating the glue pulling operation.

[0318] According to some embodiments of the present application, optionally, as shown in Figures 25 to 31, the second tape applying assembly 390 includes a second adhesive dispensing mechanism 395, which is used to absorb and remove the second adhesive tape 520. The second cutting mechanism 393 includes a second pressing block 3931, a second cutter 3932, and a second cutting cylinder 3933. The second pressing block 3931 and the second cutter 3932 are relatively fixedly arranged. The second cutting cylinder 3933 is configured to drive the second pressing block 3931 to press the released portion of the second tape roll 396 against the second adhesive dispensing mechanism 395, and drive the second cutter 3932 to cut the second adhesive tape 520 from the released portion of the second tape roll 396.

[0319] The second pressing block 3931 can be provided to press and position the released portion of the second tape roll 396, thereby improving the stability of the cutting process.

[0320] According to some embodiments of the present application, as shown in Figures 25 to 31, the second adhesive tape applying assembly 390 optionally includes a second adhesive dispensing mechanism 395, which is used to absorb and remove the second adhesive tape 520. The second adhesive dispensing mechanism 395 includes a second adhesive dispensing member 3951, a fourth adhesive dispensing motor 3952, and a fourth adhesive dispensing bracket 3953. The second adhesive dispensing member 3951 is used to absorb the second adhesive tape 520. The fourth adhesive dispensing motor 3952 is disposed on the fourth adhesive dispensing bracket 3953 and drives the second adhesive dispensing member 3951 to move to a position opposite to the release portion of the second adhesive tape roll 396 along the thickness direction D6 of the release portion of the second adhesive tape roll 396, and drives the second adhesive dispensing member 3951 toward and away from the plane where the release portion of the second adhesive tape roll 396 is located.

[0321] Such an arrangement can improve the movement freedom of the second adhesive removal member 3951 , making it easier to absorb and transfer the second adhesive tape 520 .

[0322] According to some embodiments of the present application, as shown in Figures 25 to 31 , the second adhesive dispensing member 3951 optionally includes a third adhesive dispensing portion 3954 and a fourth adhesive dispensing portion 3955. The third adhesive dispensing portion 3954 is used to absorb the first portion 521 of the second adhesive tape 520 and attach it to the main covering area 410. The fourth adhesive dispensing portion 3955 is used to absorb the second portion 522 of the second adhesive tape 520 and attach it to the side covering area 430.

[0323] Such an arrangement can improve the continuity of the glue taking action and the glue applying action.

[0324] Optionally, at least one of the third adhesive dispensing portion 3954 and the fourth adhesive dispensing portion 3955 has an adsorption surface for contacting and adsorbing the second adhesive tape 520. The third adhesive dispensing portion 3954 and the fourth adhesive dispensing portion 3955 are configured to move relative to each other in a direction perpendicular to the adsorption surface, thereby bending the second adhesive tape 520 adsorbed on the second adhesive dispensing member 3951. For example, one of the third adhesive dispensing portion 3954 and the fourth adhesive dispensing portion 3955 can be driven to move in a direction perpendicular to the adsorption surface.

[0325] According to some embodiments of the present application, as shown in Figures 25 to 31 , the fourth adhesive dispensing sub-unit 3955 is optionally a telescopic member. The fourth adhesive dispensing motor 3952 drives the second adhesive dispensing member 3951 along the third direction D3. The fourth adhesive dispensing sub-unit 3955 presses the second portion 522 of the second adhesive tape 520 against the side wrapping area 430 and contracts, allowing the third adhesive dispensing sub-unit 3954 to continue moving along the third direction D3 and adhere to the main wrapping area 410, thereby attaching the first portion 521 of the second adhesive tape 520 to the main wrapping area 410.

[0326] The telescopic member can be telescopic. For example, the telescopic member is elastic and can be elastically telescopic.

[0327] This configuration improves the structural flexibility of the second adhesive dispensing member 3951, enabling it to adaptively adjust its shape according to the shape of the electrode body 210, thereby achieving diverse adhesive application operations. Specifically, when the third and fourth adhesive dispensing portions 3954 and 3955 absorb the second adhesive tape 520, the second adhesive tape 520 assumes a planar shape. The fourth adhesive dispensing portion 3955 compresses, causing the first and second adhesive dispensing portions 3866 and 3867 to be misaligned, thereby bending the second adhesive tape 520 so that it can be simultaneously applied to both the main and side coating regions 410 and 430. Furthermore, the fourth adhesive dispensing portion 3955 is positioned between the two third adhesive dispensing portions 3954. During adhesive application, both third adhesive dispensing portions 3954 can be misaligned with the fourth adhesive dispensing portion 3955, enabling the second adhesive tape 520 to be simultaneously applied to both the main and side coating regions 410 and 430.

[0328] According to some embodiments of the present application, as shown in Figures 25 to 31 , the second unwinding mechanism 391 and the second cutting mechanism 393 are optionally provided in two corresponding groups, spaced apart along the widthwise direction D4 of the released portion of the second adhesive tape roll 396. The second adhesive dispensing mechanism 395 includes an adhesive dispensing and shifting cylinder 3956 and an adhesive dispensing and shifting bracket 3957. The adhesive dispensing and shifting cylinder 3956 is provided on the fourth adhesive dispensing bracket 3953, and the second adhesive dispensing member 3951 is provided on the adhesive dispensing and shifting bracket 3957. The adhesive dispensing and shifting cylinder 3956 is configured to drive the adhesive dispensing and shifting bracket 3957 to move along the spacing direction D5 between the two second unwinding mechanisms 391, thereby enabling the second adhesive dispensing member 3951 to switch between a standby position and a working position for the second adhesive dispensing mechanism 395 to operate. A set of the second unwinding mechanism 391 and the second cutting mechanism 393 is provided in each of the standby and working positions.

[0329] Each second unwinding mechanism 391 and second cutting mechanism 393 can form a group. Providing two sets of second unwinding mechanisms 391 and second cutting mechanisms 393 can reduce interference with the adhesive tape removal process caused by the second tape roll 396 reel change operation, thereby improving adhesive tape removal efficiency. Furthermore, the two sets of second unwinding mechanisms 391 and second cutting mechanisms 393 are arranged in layers along the height direction of the second tape applying assembly 390.

[0330] By setting the glue taking and shifting cylinder 3956 to drive the glue taking and shifting bracket 3957 to move along the spacing direction D5 of the two second unwinding mechanisms 391, the position of the second glue taking component 3951 can correspond to the position of a group of working second unwinding mechanisms 391 and second cutting mechanisms 393, thereby facilitating the glue taking operation.

[0331] According to some embodiments of the present application, optionally, as shown in Figures 25 to 31, the second tape applying assembly 390 includes a flip assembly 360, and the flip assembly 360 includes a main pressing cylinder 361, a main pressing member 362, a side pressing cylinder 363, and a side pressing member 364. The main pressing cylinder 361 is configured to drive the main pressing member 362 to press the main covering area 410 and the main surface 211, and the side pressing cylinder 363 is configured to drive the side pressing member 364 to press the side covering area 430 and the side surface 213.

[0332] The side pressing members 364 and the main pressing member 362 clamp and position the electrode assembly 200 and the coating film 400. The main pressing member 362 is configured to avoid the attachment position of the second adhesive tape 520 when pressing the main coating area 410 and the main surface 211. The side pressing members 364 are configured to avoid the attachment position of the second adhesive tape 520 when pressing the side coating area 430 and the side surface 213. This configuration improves the stability of the adhesive application process.

[0333] According to some embodiments of the present application, as shown in Figures 25 to 31 , the flip assembly 360 optionally includes a rotary motor 365 and a rotary bracket 366. A main holding cylinder 361, a main holding member 362, a side holding cylinder 363, and a side holding member 364 are disposed on the rotary bracket 366. The rotary motor 365 is configured to drive the rotary bracket 366 to rotate. The axis of rotation of the rotary bracket 366 is parallel to the second direction D2.

[0334] This configuration can improve the freedom of movement of the electrode assembly 200 and facilitate the attachment of the second tape 520 to different locations of the electrode assembly 200. Furthermore, the rotary motor 365 is configured to drive the rotary bracket 366 to rotate 180° so that the second tape 520 can be attached to opposite sides of the electrode assembly 200.

[0335] According to some embodiments of the present application, as shown in Figures 25 to 31, the second tape applying assembly 390 optionally includes two second unwinding mechanisms 391. The flip assembly 360 includes a shift motor 367 and a shift bracket 368. The main pressing cylinder 361, the main pressing member 362, the side pressing cylinder 363, the side pressing member 364, the rotation motor 365, and the rotation bracket 366 are disposed on the shift bracket 368. The shift motor 367 is configured to drive the shift bracket 368 to move along the spacing direction D5 between the two second unwinding mechanisms 391.

[0336] Each second unwinding mechanism 391 and second cutting mechanism 393 can form a group. Providing two sets of second unwinding mechanisms 391 and second cutting mechanisms 393 can reduce interference with the adhesive application process caused by the second tape roll 396 being changed, thereby improving adhesive removal efficiency. Furthermore, the two sets of second unwinding mechanisms 391 and second cutting mechanisms 393 are arranged in layers along the height direction of the second tape application assembly 390.

[0337] By setting the shift motor 367 to drive the shift bracket 368 to move along the spacing direction D5 of the two second unwinding mechanisms 391, the position of the electrode assembly 200 can correspond to the position of a group of working second unwinding mechanisms 391 and second cutting mechanisms 393, thereby facilitating the gluing operation.

[0338] According to some embodiments of the present application, optionally, as shown in Figures 4 and 32, the electrode body 210 includes two electrode modules 220 stacked on each other along the first direction D1, and each electrode module 220 includes a positive electrode plate 221, a separator 222 and a negative electrode plate 223 arranged in sequence.

[0339] Such a configuration is beneficial to improving the space utilization of the electrode assembly 200 and increasing the energy storage density of the electrode assembly 200.

[0340] Furthermore, the two electrode modules 220 can be connected in series or in parallel via the electrode ear portion 201 .

[0341] Optionally, the two electrode modules 220 may be fixed together by a fixing member 230 to improve the stability of the coating process. For example, the fixing member 230 is an adhesive tape.

[0342] According to some embodiments of the present application, as shown in Figures 5 to 30, an electrode assembly 200 includes an electrode body 210 having a first direction D1, a second direction D2, and a third direction D3 that are orthogonal to each other, and includes two main surfaces 211 disposed opposite to each other along the first direction D1, two end surfaces 212 disposed opposite to each other along the second direction D2, and two side surfaces 213 disposed opposite to each other along the third direction D3. The coating apparatus 300 includes a discharge assembly 310, a cutting assembly 320, and a first coating assembly 330. The discharge assembly 310 is used to store and release a material strip 401. The material strip 401 includes a plurality of coating films 400 sequentially connected along the length direction D7 of the material strip 401. Each coating film 400 includes two main coating regions 410 spaced apart from each other and a connecting region 420 connecting the two main coating regions 410. The cutting assembly 320 is used to cut the head end coating film 409 located at the head end of the material strip 401 from the material strip 401. The first coating assembly 330 is used to coat the connection area 420 of the head end coating film 409 on the first one 212a of the two end surfaces 212, and to coat the two main coating areas 410 on the corresponding one of the two main surfaces 211, so as to form an electrode coating body 240. The first coating assembly 330 includes an electrode transmission mechanism 331 and a main surface coating mechanism 332. The electrode transmission mechanism 331 is used to transport the electrode assembly 200 along the second direction D2 so that the first one 212a of the two end surfaces 212 contacts the connection area 420. The main surface coating mechanism 332 is used to continue to transport the electrode assembly 200 along the second direction D2 after the first one 212a of the two end surfaces 212 contacts the connection area 420, and to coat the two main coating areas 410 on the corresponding one of the two main surfaces 211. The main surface coating mechanism 332 includes two roller groups 333 arranged side by side and spaced apart. After the first of the two end surfaces 212a contacts the connection region 420, the electrode transmission mechanism 331 feeds the electrode assembly 200 and the head-end coating film 409 between the two roller groups 333. The two roller groups 333 transmit the electrode assembly 200 by rolling and respectively press the two main coating regions 410 against the corresponding one of the two main surfaces 211. At least one of the two roller groups 333 is configured to float along the first direction D1. This configuration allows for adaptive adjustment of the distance between the two roller groups 333, ensuring a better match between the distance between the two roller groups 333 and the dimensions of the electrode assembly 200 along the first direction D1, thereby improving the coating effect. One of the two pressing roller groups 333 is an active pressing roller group 333 , or both pressing roller groups 333 are active pressing roller groups 333 , and the movement direction D8 of the contact point between the active pressing roller group 333 and the main surface 211 is consistent with the movement direction D9 of the electrode transmission mechanism 331 .The first covering assembly 330 further includes a first film positioning mechanism 334 and a second film positioning mechanism 335. The first film positioning mechanism 334 is used to position one end of the first end covering film 409 toward the unloading assembly 310, and the second film positioning mechanism 335 is used to position the other end of the first end covering film 409 away from the unloading assembly 310, so that before the first of the two end surfaces 212a contacts the connection area 420, the connection area 420 of the first end covering film 409 and the two main covering areas 410 are coplanar with each other, and the second direction D2 is perpendicular to the plane of the connection area 420. The first covering assembly 330 further includes a third film positioning mechanism 336. The third film positioning mechanism 336 is located on the side of the first film positioning mechanism 334 facing the unloading assembly 310 and is used to position the subsequent covering film 411 adjacent to the first end covering film 409. The cutting assembly 320 cuts the material strip 401 between the first film positioning mechanism 334 and the third film positioning mechanism 336. The third film positioning mechanism 336 is further configured to feed the subsequent coating film 411 into the first and second film positioning mechanisms 334 and 335 after the first coating film 409 is cut from the material strip 401. The electrode assembly 200 also includes a tab 201 protruding from the first end 212a of the two end surfaces 212. The connection region 420 is provided with an opening 421. The first coating assembly 330 is configured to allow the tab 201 to pass through the opening 421. The unloading component 310 includes two unloading mechanisms 311, each of which stores and releases the material tape 401 respectively, wherein the material tape 401 corresponding to the first of the two unloading mechanisms 311 serves as the working material tape 402 and is fed into the first covering component 330, and the material tape 401 corresponding to the second of the two unloading mechanisms 311 serves as the spare material tape 405. The covering equipment 300 also includes a switching component 340, which is used to fix the spare material tape 405 on the working material tape 402 so that the spare material tape 405 is fed into the first covering component 330 when the working material tape 402 moves. The switching assembly 340 includes two pressing mechanisms 341 and a material strip cutting mechanism 342. The two pressing mechanisms 341 cooperate with each other to clamp the working material strip 402 and the spare material strip 405 from both sides of the working material strip 402 and the spare material strip 405. The material strip cutting mechanism 342 cuts the working material strip 402 and the spare material strip 405 in the clamped state, so that the working material strip 402 and the spare material strip 405 respectively form an upstream part and a downstream part located upstream and downstream of the cutting position of the material strip cutting mechanism 342. The two pressing mechanisms 341 connect the downstream part 403 of the working material strip 402 with the upstream part 407 of the spare material strip 405.The two pressing mechanisms 341 respectively include a pressing member 3411, and at least one of the two pressing mechanisms 341 includes a pressing driving member 3412. The pressing member 3411 includes a first pressing area 3414 and a second pressing area 3415 separated by a slot 3413. The pressing driving member 3412 drives at least one pressing member 3411 so that the two first pressing areas 3414 cooperate with each other to clamp the working material strip 402 and the spare material strip 405, and the two second pressing areas 3415 cooperate with each other to clamp the working material strip 402 and the spare material strip 405. The material strip cutting mechanism 342 includes a cutter 3421. The cutter 3421 is telescopically arranged in the slot 3413 of the first of the two pressing members 3411, and extends into the slot 3413 of the second of the two pressing members 3411 in the clamping state, thereby cutting the working material strip 402 and the spare material strip 405. The strip cutting mechanism 342 includes an elastic member 3422 configured to elastically support the first of the two pressing members 3411, causing the first of the two pressing members 3411 to elastically retract when clamped, thereby allowing the cutter 3421 to extend from the slot 3413 of the first of the two pressing members 3411. The first of the two pressing mechanisms 341 is configured to simultaneously absorb the downstream portion 403 of the working strip 402 and the upstream portion 407 of the backup strip 405, while the second of the two pressing mechanisms 341 is configured to apply a connecting tape to the junction between the downstream portion 403 of the working strip 402 and the upstream portion 407 of the backup strip 405. The two pressing mechanisms 341 respectively include a pressing part 3411. The pressing part 3411 of the first of the two pressing mechanisms 341 is configured to simultaneously adsorb the downstream part 403 of the working material tape 402 and the upstream part 407 of the spare material tape 405. The second of the two pressing mechanisms 341 includes a pressing drive part 3412, a rotating drive part 3417 and a glue part 3418. The glue part 3418 is configured to carry the connecting tape, and the rotating drive part 3417 is configured to be able to rotationally drive the glue part 3418 and the pressing part 3411 of the second of the two pressing mechanisms 341 to switch between the first state and the second state. In the first state, the pressing members 3411 of the two pressing mechanisms 341 are arranged relative to each other. In the second state, the adhesive member 3418 is arranged relative to the pressing member 3411 of the first of the two pressing mechanisms 341. The pressing drive member 3412 is configured to drive the pressing members 3411 of the two pressing mechanisms 341 to press each other in the first state, and to drive the adhesive member 3418 to press the pressing member 3411 of the first of the two pressing mechanisms 341 in the second state. The unloading assembly 310 corresponding to the working material strip 402 is also configured to collect the upstream portion 404 of the working material strip 402. The switching assembly 340 also includes a material receiving mechanism 312 for collecting the downstream portion 406 of the backup material strip 405.During the process of collecting the upstream part 404 of the working material belt 402 and the downstream part 406 of the spare material belt 405, the two pressing mechanisms 341 are in a separated state. The two pressing mechanisms 341 are also configured to respectively adsorb the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405, and after the upstream part 404 of the working material belt 402 and the downstream part 406 of the spare material belt 405 are collected, the downstream part 403 of the working material belt 402 and the upstream part 407 of the spare material belt 405 are transferred to the first of the two pressing mechanisms 341. The two pressing mechanisms 341 respectively include a pressing member 3411, and at least one of the two pressing mechanisms 341 includes a pressing driving member 3412. The pressing member 3411 includes a first pressing area 3414 and a second pressing area 3415 spaced apart from each other. The pressing driving member 3412 drives at least one pressing member 3411 so that the two first pressing areas 3414 cooperate with each other to clamp the working material tape 402 and the spare material tape 405, and the two second pressing areas 3415 cooperate with each other to clamp the working material tape 402 and the spare material tape 405. The material tape cutting mechanism 342 cuts the working material tape 402 and the spare material tape 405 in the spaced area between the first pressing area 3414 and the second pressing area 3415. After the cutting is completed, the pressing drive 3412 drives the two pressing members 3411 to separate from each other. The two pressing members 3411 respectively absorb the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the spare material strip 405. After the upstream portion 404 of the working material strip 402 and the downstream portion 406 of the spare material strip 405 are collected, the pressing drive 3412 drives the two pressing members 3411 to separate from each other, and the first of the two holding mechanisms 341 simultaneously absorbs the downstream portion 403 of the working material strip 402 and the upstream portion 407 of the spare material strip 405. The coating apparatus 300 further includes a positioning assembly 350, which is configured to clamp and fix the electrode coating 240 output by the first coating assembly 330 from the outside of the two main coating areas 410. The coating film 400 includes a side coating region 430 connected to the main coating region 410. The coating apparatus 300 further includes a second coating assembly 370. The positioning assembly 350 transfers the electrode coating body 240 to the second coating assembly 370. The second coating assembly 370 is configured to drive the side coating region 430 to contact and coat the side surface 213. The second coating assembly 370 includes a side pressure plate 371, a first pressure plate transmission mechanism 372, and a second pressure plate transmission mechanism 373. The first pressure plate transmission mechanism 372 is configured to drive the side pressure plate 371 in a first direction D1 so that the side pressure plate 371 pushes the side coating region 430 to bend relative to the main coating region 410 toward the side surface 213. The second pressure plate transmission mechanism 373 is configured to drive the side pressure plate 371 in a third direction D3 so that the side pressure plate 371 presses the side coating region 430 against the side surface 213.The coating film 400 includes an end coating region 440 connected to the main coating region 410. The second coating assembly 370 is configured to drive the end coating region 440 to contact and coat the second one 212b of the two end surfaces 212. The second coating assembly 370 includes an end surface pressure plate 374, a first pressure plate transmission mechanism 372, and a third pressure plate transmission mechanism 375. The first pressure plate transmission mechanism 372 is configured to drive the end surface pressure plate 374 in a first direction D1 so that the end surface pressure plate 374 pushes the end coating region 440 to bend relative to the main coating region 410 toward the second one 212b of the two end surfaces 212. The third pressure plate transmission mechanism 375 is configured to drive the end surface pressure plate 374 in a second direction D2 so that the end surface pressure plate 374 presses the end coating region 440 against the second one 212b of the two end surfaces 212. The first platen transmission mechanism 372 includes a platen transmission motor 377, a first platen bracket 378, and a second platen bracket 379. The platen transmission motor 377 is mounted on the first platen bracket 378 and drives the second platen bracket 379 to move relative to the first platen bracket 378. The second platen transmission mechanism 373 includes a first platen cylinder 376, which is mounted on the second platen bracket 379 and drives the side platen 371 to move relative to the second platen bracket 379. The third platen transmission mechanism 375 includes a second platen cylinder 3761, which is mounted on the second platen bracket 379 and drives the end platen 374 to move relative to the second platen bracket 379. The coating film 400 also includes a side coating area 430 and an end coating area 440 connected to the main coating area 410, wherein the side coating area 430 is coated on the side surface 213, and the end coating area 440 is coated on the second of the two end surfaces 212b. The coating device 300 also includes a first tape attaching component 380, which is used to drive the electrode assembly 200 and the first tape 510 to move relative to each other. The first tape 510 includes a first part and a second part connected to each other. The first tape attaching component 380 is arranged to attach the first part 511 of the first tape 510 to the side coating area 430 and the second part 512 of the first tape 510 to the end coating area 440 at the corner formed by the side surface 213 and the second of the two end surfaces 212b. The first tape attaching assembly 380 includes a first unwinding mechanism 381, a first glue pulling mechanism 382 and a first cutting mechanism 383. The first unwinding mechanism 381 is configured to place and release the first tape roll 384, the first glue pulling mechanism 382 is configured to clamp and pull the head end of the released part of the first tape roll 384, and the first cutting mechanism 383 is configured to cut out the first tape 510 from the released part of the first tape roll 384.The first adhesive-applying mechanism 382 includes a first adhesive-applying cylinder 3821, a first adhesive-applying motor 3822, and a first adhesive-applying member 3823. The first adhesive-applying cylinder 3821 is used to drive the first adhesive-applying member 3823 to clamp the head end of the release portion, while the first adhesive-applying motor 3822 is used to drive the first adhesive-applying member 3823 to move and pull the release portion. The first unwinding mechanism 381 and the first cutting mechanism 383 are two corresponding sets. The first tape applying assembly 380 includes a switching mechanism 385, which includes a roll holder 3851 and a switching motor 3852. The two sets of the first unwinding mechanism 381 and the first cutting mechanism 383 are mounted on the roll holder 3851. The switching motor 3852 drives the roll holder 3851 to rotate about a predetermined rotation axis, enabling the two sets of the first unwinding mechanism 381 and the first cutting mechanism 383 to switch between a standby position and a working position for the first adhesive-applying mechanism 382 and the first cutting mechanism 383 to operate. The rotation axis is perpendicular to the plane where the release portion is located. The first tape applying assembly 380 includes a first adhesive dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first cutting mechanism 383 includes a first pressing block 3831, a first cutter 3832, and a first cutting cylinder 3833. The first pressing block 3831 and the first cutter 3832 are relatively fixedly arranged. The first cutting cylinder 3833 is configured to drive the first pressing block 3831 to press the release portion against the first adhesive dispensing mechanism 386 and drive the first cutter 3832 to cut the first adhesive tape 510 from the release portion. The first tape applying assembly 380 includes a first adhesive dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first adhesive dispensing mechanism 386 includes a first adhesive dispensing member 3861, a first adhesive dispensing motor 3862, a second adhesive dispensing motor 3863, a first adhesive dispensing bracket 3864, and a second adhesive dispensing bracket 3865. The first adhesive dispensing member 3861 is used to absorb the first adhesive tape 510. The first adhesive dispensing motor 3862 is mounted on the first adhesive dispensing bracket 3864 and drives the second adhesive dispensing bracket 3865 to move above the release portion. The second adhesive dispensing motor 3863 is mounted on the second adhesive dispensing bracket 3865 and drives the first adhesive dispensing member 3861 toward and away from the plane where the release portion is located. The first adhesive dispensing member 3861 includes a first adhesive dispensing sub-unit 3866 and a second adhesive dispensing sub-unit 3867. The first adhesive dispensing sub-unit 3866 is used to absorb the first portion 511 of the first adhesive tape 510 and attach it to the side covering area 430. The second adhesive dispensing sub-unit 3867 is used to absorb the second portion 512 of the first adhesive tape 510 and attach it to the end covering area 440. The first adhesive dispensing sub-unit 3866 is a telescopic member.The second adhesive dispensing motor 3863 drives the first adhesive dispensing member 3861 in the third direction D3. The first adhesive dispensing sub-unit 3866 presses the first portion 511 of the first adhesive tape 510 against the side covering area 430 and retracts, allowing the second adhesive dispensing sub-unit 3867 to continue moving in the third direction D3 and contact the end covering area 440, thereby attaching the second portion 512 of the first adhesive tape 510 to the end covering area 440. Alternatively, the second adhesive dispensing sub-unit 3867 is a telescopic member. The second adhesive dispensing motor 3863 drives the first adhesive dispensing member 3861 in the second direction D2. The second adhesive dispensing sub-unit 3867 presses the second portion 512 of the first adhesive tape 510 against the end covering area 440 and retracts, allowing the first adhesive dispensing sub-unit 3866 to continue moving in the second direction D2 and contact the side covering area 430, thereby attaching the first portion 511 of the first adhesive tape 510 to the side covering area 430. The first cutting mechanism 383 is configured to cut two first adhesive tapes 510 from the release portion. There are two first adhesive dispensing components 3861, each of which absorbs a corresponding first adhesive tape 510. The first tape applying assembly 380 includes a first adhesive dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first adhesive dispensing mechanism 386 includes a first adhesive dispensing component 3861, a first adhesive dispensing motor 3862, a second adhesive dispensing motor 3863, a first adhesive dispensing bracket 3864, a second adhesive dispensing bracket 3865, a third adhesive dispensing bracket 3868, and an adhesive dispensing cylinder 3869. The first adhesive dispensing component 3861 is used to absorb the first adhesive tape 510. The first adhesive dispensing motor 3862 is located on the first adhesive dispensing bracket 3864 and drives the second adhesive dispensing bracket 3865 to move above the release portion. The second glue dispensing motor 3863 is mounted on the second glue dispensing bracket 3865 and drives the third glue dispensing bracket 3868 and the two first glue dispensing members 3861 toward and away from the plane of the release portion. The glue dispensing cylinder 3869 is mounted on the third glue dispensing bracket 3868 and is configured to drive the two first glue dispensing members 3861 away from each other so that the two first glue dispensing members 3861 correspond to two corners of the electrode assembly 200 spaced apart along the third direction D3. The coating apparatus 300 further includes a second tape attaching assembly 390, which is used to drive relative movement between the electrode assembly 200 and the second tape 520. The second tape 520 includes a first portion and a second portion connected to each other. The second tape attaching assembly 390 is configured to attach the first portion 521 of the second tape 520 to the main coating area 410 and the second portion 522 of the second tape 520 to the side coating area 430 at the corner formed by the side surface 213 and the main surface 211. There are two first portions 521 of the second tape 520, located at both ends of the second portion 522 of the second tape 520. The second tape attaching assembly 390 is configured to attach the two first portions of the second tape 520 to a corresponding one of the two main coating areas 410.The second tape applying assembly 390 includes a second unwinding mechanism 391, a second adhesive pulling mechanism 392, and a second cutting mechanism 393. The second unwinding mechanism 391 is configured to place and release the second tape roll 396. The second adhesive pulling mechanism 392 is configured to clamp and pull the leading end of the released portion of the second tape roll 396. The second cutting mechanism 393 is configured to cut the second tape 520 from the released portion of the second tape roll 396. The second adhesive pulling mechanism 392 includes a second adhesive clamping cylinder 3921, a second adhesive pulling motor 3922, and a second adhesive clamping member 3923. The second adhesive clamping cylinder 3921 is configured to drive the second adhesive clamping member 3923 to clamp the leading end of the released portion, and the second adhesive pulling motor 3922 is configured to drive the second adhesive clamping member 3923 to move and pull the released portion. The second unwinding mechanism 391 and the second cutting mechanism 393 are two corresponding sets, spaced apart along the width direction D4 of the released portion. The second adhesive tape applying assembly 390 includes a glue drawing bracket 394, a glue drawing and shifting cylinder 3941, and a glue drawing and shifting bracket 3942. The glue drawing and shifting cylinder 3941 is disposed on the glue drawing bracket 394, and the second glue drawing mechanism 392 is disposed on the glue drawing and shifting bracket 3942. The glue drawing and shifting cylinder 3941 is configured to drive the glue drawing and shifting bracket 3942 to move along the spacing direction D5 between the two second unwinding mechanisms 391, so that the second glue drawing mechanism 392 can switch between a standby position and a working position for the second glue drawing mechanism 392 to operate. A set of second unwinding mechanisms 391 and a second cutting mechanism 393 are each disposed in the standby position and the working position. The second adhesive tape applying assembly 390 includes a second glue dispensing mechanism 395, which is used to absorb and remove the second adhesive tape 520. The second cutting mechanism 393 includes a second pressing block 3931, a second cutter 3932, and a second cutting cylinder 3933. The second pressing block 3931 and the second cutter 3932 are fixed relative to each other. The second cutting cylinder 3933 is configured to drive the second pressing block 3931 to press the release portion against the second adhesive dispensing mechanism 395 and drive the second cutter 3932 to cut the second adhesive tape 520 from the release portion. The second tape applying assembly 390 includes a second adhesive dispensing mechanism 395, which is used to absorb and remove the second adhesive tape 520. The second adhesive dispensing mechanism 395 includes a second adhesive dispensing member 3951, a fourth adhesive dispensing motor 3952, and a fourth adhesive dispensing bracket 3953. The second adhesive dispensing member 3951 is used to absorb the second adhesive tape 520. The fourth adhesive dispensing motor 3952 is mounted on the fourth adhesive dispensing bracket 3953 and drives the second adhesive dispensing member 3951 to move relative to the release portion along the thickness direction D6 of the release portion and drives the second adhesive dispensing member 3951 toward and away from the plane of the release portion. The second adhesive dispensing member 3951 includes a third adhesive dispensing portion 3954 and a fourth adhesive dispensing portion 3955. The third adhesive dispensing portion 3954 is used to absorb the first portion 521 of the second adhesive tape 520 and adhere it to the main covering area 410.The fourth adhesive dispensing unit 3955 is used to absorb the second portion 522 of the second adhesive tape 520 and attach it to the side wrapping area 430. The fourth adhesive dispensing unit 3955 is a telescopic component. The fourth adhesive dispensing motor 3952 drives the second adhesive dispensing unit 3951 along the third direction D3. The fourth adhesive dispensing unit 3955 presses the second portion 522 of the second adhesive tape 520 against the side wrapping area 430 and retracts, allowing the third adhesive dispensing unit 3954 to continue moving along the third direction D3 and adhere to the main wrapping area 410, thereby attaching the first portion 521 of the second adhesive tape 520 to the main wrapping area 410. The second unwinding mechanism 391 and the second cutting mechanism 393 are two corresponding groups, spaced apart along the width direction D4 of the release portion. The second adhesive dispensing mechanism 395 includes an adhesive dispensing and shifting cylinder 3956 and an adhesive dispensing and shifting bracket 3957. The glue dispensing and shifting cylinder 3956 is mounted on the fourth glue dispensing bracket 3953, and the second glue dispensing member 3951 is mounted on the glue dispensing and shifting bracket 3957. The glue dispensing and shifting cylinder 3956 is configured to drive the glue dispensing and shifting bracket 3957 to move along the spacing direction D5 between the two second unwinding mechanisms 391, thereby enabling the second glue dispensing member 3951 to switch between a standby position and a working position for the second glue dispensing mechanism 395 to operate. A second unwinding mechanism 391 and a second cutting mechanism 393 are each mounted in the standby position and the working position.

[0343] Optionally, the coating equipment 300 further includes a conveying device and an assembly device, wherein the conveying device is used to convey the structure to be assembled to each workstation of the assembly equipment. The workstations of the assembly equipment at least include a tab welding device, a shell insertion device, a tab insertion device, a pole welding device, and a bottom cover welding device.

[0344] The tab welding device is used to weld the multiple tabs of the electrode assembly 200 to form the tab portion 201. The shell insertion device is used to install the electrode assembly 200 into the shell 100 from the open end 112. The tab insertion device is used to clamp the tab portion 201 through the through-hole when the electrode assembly 200 is installed in the shell. The pole welding device is used to weld the pole tab portion 201 passing through the through-hole to the side of the pole facing away from the accommodating cavity. The bottom cover welding device is used to weld the bottom cover to the open end 112 of the shell 100.

[0345] It should be noted that, in this embodiment, the conveying equipment includes a conveyor line, which can be a conveying structure formed by a motor-driven conveyor roller and a conveyor belt, or a conveying structure formed by a motor-driven conveyor chain link, or an AGV conveyor cart, which can realize conveying in at least one direction and can support and ensure the stability of the structure to be assembled.

[0346] The purpose of the tab welding device is to form the tab portion 201 after pre-welding the tab sheet, and it can be an ultrasonic welding device, which can ensure that the tab is welded in a clamped and stable state. The shell entry device is a pushing mechanism or a clamping mechanism, which can stably move the electrode assembly 200 toward the open end 112 of the shell 100 and enter the accommodating cavity through the open end 112. Similarly, the tab piercing device can adopt a clamping structure or a guiding structure, which can guide the tab portion 201 to pass through the through hole smoothly without interfering with the shell 100. The pole welding device is intended to achieve welding of the pole tab portion 201 and the pole, and it can be a laser welding device. The bottom cover welding device is intended to achieve welding of the circumferential edges of the bottom cover and the open end 112 of the shell 100, and is also a laser welding device.

[0347] In addition, the assembly equipment is not limited to including a tab welding device, a shell insertion device, a tab piercing device, a pole welding device, and a bottom cover welding device. For example, when the electrode assembly 200 includes multiple electrode modules 220, for example, when it includes two electrode modules 220, the assembly equipment also includes a matching component, which is used to stack the multiple electrode modules 220 so that the tabs of the two electrode modules 220 are roughly opposite to each other, so that the conveying structure can convey the matched electrode modules 220 to the tab welding device for welding the tabs to facilitate the formation of the tab portion 201. For example, in order to ensure the reliability of the battery assembly process, dust removal, NG detection stations, etc. can also be added between any two adjacent stations, which is not limited in this embodiment.

[0348] The electrode assembly described in the embodiment of the coating method of the electrode assembly of the present application includes an electrode body, the electrode body has a first direction, a second direction and a third direction that are orthogonal to each other, and includes two main surfaces arranged opposite to each other along the first direction, two end surfaces arranged opposite to each other along the second direction, and two side surfaces arranged opposite to each other along the third direction. The coating method includes: S100: controlling the discharge component to release the material strip, the material strip includes a plurality of coating films connected in sequence along the length direction of the material strip, each coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. S200: controlling the cutting component to cut the head end coating film located at the head end of the material strip from the material strip. S300: controlling the first coating component to coat the connecting area of ​​the head end coating film on the first of the two end surfaces, and respectively coat the two main coating areas on the corresponding one of the two main surfaces to form an electrode coating body.

[0349] According to some embodiments of the present application, optionally, controlling the first covering component to cover the connection area of ​​the head end covering film on the first of the two end surfaces, and respectively covering the two main covering areas on corresponding ones of the two main surfaces, includes:

[0350] S310: Controlling the electrode transmission mechanism to convey the electrode assembly along the second direction so that a first one of the two end surfaces contacts the connection area and is conveyed between the two pressing roller groups.

[0351] S320: Control the two pressing roller groups to continue conveying the electrode assembly along the first direction in a rolling manner, and press the two main covering regions onto corresponding ones of the two main surfaces respectively.

[0352] According to some embodiments of the present application, the unloading assembly optionally includes two unloading mechanisms, each of which stores and releases the material strip, wherein the material strip corresponding to the first of the two unloading mechanisms serves as the working material strip and is fed into the first coating assembly, and the material strip corresponding to the second of the two unloading mechanisms serves as the spare material strip. The coating method further includes:

[0353] S400: Control the two pressing mechanisms to cooperate with each other to clamp the working material strip and the spare material strip from both sides.

[0354] S500: Controlling the strip cutting mechanism to cut the working strip and the spare strip in the clamped state, so that the working strip and the spare strip form upstream and downstream portions located upstream and downstream of the cutting position of the strip cutting mechanism, respectively.

[0355] S600: Control the two holding mechanisms to connect the downstream portion of the working material strip with the upstream portion of the spare material strip.

[0356] According to some embodiments of the present application, optionally, controlling the two holding mechanisms to connect the downstream portion of the working material strip with the upstream portion of the spare material strip includes:

[0357] S610: Control the first of the two pressing mechanisms to simultaneously absorb the downstream portion of the working material strip and the upstream portion of the spare material strip.

[0358] S620: Control the second one of the two pressing mechanisms to apply a connecting tape at a joining position between the downstream portion of the working material tape and the upstream portion of the standby material tape.

[0359] According to some embodiments of the present application, the electrode assembly may optionally include a pole ear portion, the pole ear portion protruding from the first of the two end surfaces, and an opening is provided on the connection area. Controlling the first covering assembly to cover the connection area of ​​the head end covering film on the first of the two end surfaces includes:

[0360] S330: Control the first covering component to pass the pole ear portion through the opening, and the connection area contacts and covers the first of the two end surfaces.

[0361] Regarding the embodiment of the coating method of the electrode assembly of the present application, reference may be made to the relevant content of the embodiment of the coating equipment of the electrode assembly above, which will not be repeated here.

[0362] To sum up, the embodiments of the present application can achieve that the material belt can continuously provide the coating film, simplify the complexity of the material picking action of the coating film, enable the coating film to be fed continuously, reduce the layout of the robot, simplify the complexity of the coating process, and facilitate the maintenance of the coating equipment.

[0363] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating device for an electrode assembly, characterized in that: The electrode assembly includes an electrode body, the electrode body has a first direction, a second direction and a third direction orthogonal to each other, and includes two main surfaces arranged opposite to each other along the first direction, two end surfaces arranged opposite to each other along the second direction, and two side surfaces arranged opposite to each other along the third direction, and the coating device includes: A material unloading assembly, the material unloading assembly is used to store and release a material strip, the material strip includes a plurality of coating films connected in sequence along the length direction of the material strip, each of the coating films includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas; A cutting assembly, the cutting assembly being used to cut the head end coating film located at the head end of the material strip from the material strip; The first coating component is used to coat the connection area of ​​the head end coating film on the first of the two end surfaces, and to coat the two main coating areas on the corresponding one of the two main surfaces, so as to form an electrode coating body.

2. The coating device according to claim 1, characterized in that: The first covering component comprises: an electrode transmission mechanism, for transmitting the electrode assembly along the second direction so that the first of the two end surfaces contacts the connection area; The main surface coating mechanism is used to continue to transmit the electrode assembly along the second direction after the first of the two end surfaces contacts the connection area, and to make the two main coating areas coat the corresponding one of the two main surfaces respectively.

3. The coating device according to claim 2, characterized in that: The main surface coating mechanism includes two pressure roller groups arranged side by side and at intervals. The electrode transmission mechanism sends the electrode assembly and the head end coating film between the two pressure roller groups after the first of the two end surfaces contacts the connection area. The two pressure roller groups transmit the electrode assembly in a rolling manner and press the two main coating areas onto the corresponding one of the two main surfaces respectively.

4. The coating device according to claim 3, characterized in that: At least one of the two pressing roller groups is arranged to be able to float along the first direction.

5. The coating device according to claim 3, characterized in that: One of the two pressing roller groups is an active pressing roller group, or the two pressing roller groups are active pressing roller groups respectively, and the movement direction of the contact point between the active pressing roller group and the main surface is consistent with the movement direction of the electrode transmission mechanism.

6. The coating device according to claim 2 or 3, characterized in that: The first covering component also includes a first film positioning mechanism and a second film positioning mechanism, the first film positioning mechanism is used to position one end of the head end covering film toward the discharge component, and the second film positioning mechanism is used to position the other end of the head end covering film away from the discharge component, so that before the first of the two end faces contacts the connecting area, the connecting area of ​​the head end covering film and the two main covering areas are coplanar with each other, and the second direction is perpendicular to the plane where the connecting area is located.

7. The coating device according to claim 6, characterized in that: The first covering component also includes a third film positioning mechanism, which is located on the side of the first film positioning mechanism facing the discharge component and is used to position the subsequent covering film adjacent to the first end covering film. The cutting component cuts the material strip between the first film positioning mechanism and the third film positioning mechanism.

8. The coating device according to claim 7, characterized in that: The third film positioning mechanism is further configured to feed the subsequent covering film into the first film positioning mechanism and the second film positioning mechanism after the first-end covering film is cut off from the material strip.

9. The coating device according to claim 1, characterized in that: The electrode assembly further includes a pole ear portion protruding from the first of the two end surfaces, an opening is provided on the connection area, and the first covering assembly is configured so that the pole ear portion passes through the opening.

10. The coating device according to claim 1, characterized in that: The material unloading assembly includes two material unloading mechanisms, each of which stores and releases the material tape respectively, wherein the material tape corresponding to the first of the two material unloading mechanisms is used as a working material tape and is fed into the first covering assembly, and the material tape corresponding to the second of the two material unloading mechanisms is used as a spare material tape, and the covering equipment also includes a switching assembly, which is used to fix the spare material tape on the working material tape so that the spare material tape is fed into the first covering assembly driven by the working material tape.

11. The coating device according to claim 10, characterized in that: The switching assembly includes two pressing mechanisms and a material strip cutting mechanism. The two pressing mechanisms cooperate with each other to clamp the working material strip and the spare material strip from both sides of the working material strip and the spare material strip. The material strip cutting mechanism cuts the working material strip and the spare material strip in the clamped state so that the working material strip and the spare material strip form an upstream part and a downstream part respectively located upstream and downstream of the cutting position of the material strip cutting mechanism. The two pressing mechanisms connect the downstream part of the working material strip with the upstream part of the spare material strip.

12. The coating device according to claim 11, characterized in that: The two pressing mechanisms respectively include a pressing member, and at least one of the two pressing mechanisms includes a pressing drive member, the pressing member includes a first pressing area and a second pressing area separated by a slot, the pressing drive member drives at least one of the pressing members so that the two first pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the two second pressing areas cooperate with each other to clamp the working material tape and the spare material tape, the material tape cutting mechanism includes a cutter, the cutter is telescopically arranged in the slot of the first of the two pressing members, and extends into the slot of the second of the two pressing members in the clamping state, thereby cutting the working material tape and the spare material tape.

13. The coating device according to claim 12, characterized in that: The material strip cutting mechanism includes an elastic member, which is configured to elastically support the first of the two clamping members so that the first of the two clamping members elastically retreats in the clamping state, thereby allowing the cutter to extend out of the slot of the first of the two clamping members.

14. The coating device according to claim 11, characterized in that: The first of the two pressing mechanisms is configured to simultaneously absorb the downstream portion of the working material tape and the upstream portion of the spare material tape, and the second of the two pressing mechanisms is configured to apply a connecting tape at the junction of the downstream portion of the working material tape and the upstream portion of the spare material tape.

15. The coating device according to claim 14, characterized in that: The two pressing mechanisms respectively include a pressing piece, the pressing piece of the first of the two pressing mechanisms is configured to simultaneously adsorb the downstream portion of the working material belt and the upstream portion of the spare material belt, the second of the two pressing mechanisms includes a pressing drive, a rotating drive and a glue sticking piece, the glue sticking piece is configured to carry the connecting tape, the rotating drive is configured to be able to rotationally drive the glue sticking piece and the pressing piece of the second of the two pressing mechanisms to switch between a first state and a second state, in the first state, the pressing pieces in the two pressing mechanisms are arranged relative to each other, in the second state, the glue sticking piece and the pressing piece of the first of the two pressing mechanisms are arranged relative to each other, the pressing drive is configured to drive the pressing pieces in the two pressing mechanisms to be pressed against each other in the first state, and to drive the glue sticking piece and the pressing piece of the first of the two pressing mechanisms to be pressed against each other in the second state.

16. The coating device according to claim 14, characterized in that: The unloading assembly corresponding to the working material belt is also configured to collect the upstream portion of the working material belt, and the switching assembly further comprises a collecting mechanism, which is used to collect the downstream portion of the spare material belt.

17. The coating device according to claim 16, characterized in that: During the process of collecting the upstream part of the working material belt and the downstream part of the spare material belt, the two pressing and holding mechanisms are in a separated state. The two pressing and holding mechanisms are also configured to respectively adsorb the downstream part of the working material belt and the upstream part of the spare material belt, and after the upstream part of the working material belt and the downstream part of the spare material belt are collected, transfer the downstream part of the working material belt and the upstream part of the spare material belt to the first of the two pressing and holding mechanisms.

18. The coating device according to claim 14, characterized in that: The two pressing mechanisms respectively include a pressing member, and at least one of the two pressing mechanisms includes a pressing driving member, the pressing member includes a first pressing area and a second pressing area spaced apart from each other, the pressing driving member drives at least one of the pressing members, so that the two first pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the two second pressing areas cooperate with each other to clamp the working material tape and the spare material tape, and the material tape cutting mechanism cuts the working material tape and the spare material tape in the spaced area between the first pressing area and the second pressing area; After the cutting is completed, the clamping driving member drives the two clamping members to separate from each other, and the two clamping members respectively adsorb the downstream part of the working material belt and the upstream part of the spare material belt, and after the upstream part of the working material belt and the downstream part of the spare material belt are collected, the clamping driving member drives the two clamping members to separate from each other, and the first of the two pressing mechanisms simultaneously adsorbs the downstream part of the working material belt and the upstream part of the spare material belt.

19. The coating device according to claim 1, characterized in that: The coating equipment further includes a positioning component, which is configured to clamp and fix the electrode coating output by the first coating component from outside the two main coating areas.

20. The coating device according to claim 19, characterized in that The coating film includes a side coating area connected to the main coating area, and the coating equipment also includes a second coating component. The positioning component transfers the electrode coating body to the second coating component, and the second coating component is configured to drive the side coating area to contact and coat the side surface.

21. The coating device according to claim 20, characterized in that The second covering assembly includes a side pressure plate, a first pressure plate transmission mechanism and a second pressure plate transmission mechanism. The first pressure plate transmission mechanism is used to transmit the side pressure plate along the first direction so that the side pressure plate pushes the side covering area to bend toward the side relative to the main covering area. The second pressure plate transmission mechanism is used to transmit the side pressure plate along the third direction so that the side pressure plate presses the side covering area against the side.

22. The coating device according to claim 21, characterized in that The covering film includes an end covering area connected to the main covering area, and the second covering component is configured to drive the end covering area to contact and cover the second of the two end surfaces.

23. The coating device according to claim 22, characterized in that The second covering assembly includes an end face pressure plate, a first pressure plate transmission mechanism and a third pressure plate transmission mechanism. The first pressure plate transmission mechanism is used to transmit the end face pressure plate along the first direction so that the end face pressure plate pushes the end covering area to bend toward the second of the two end faces relative to the main covering area. The third pressure plate transmission mechanism is used to transmit the end face pressure plate along the second direction so that the end face pressure plate presses the end covering area onto the second of the two end faces.

24. The coating device according to claim 1, characterized in that The coating film also includes a side coating area and an end coating area connected to the main coating area, wherein the side coating area is coated on the side surface, and the end coating area is coated on the second of the two end surfaces. The coating device also includes a first tape attaching component, which is used to drive the electrode assembly and the first tape to move relative to each other. The first tape includes a first part and a second part connected to each other. The first tape attaching component is arranged to attach the first part of the first tape to the side coating area and the second part of the first tape to the end coating area at a corner formed by the side surface and the second of the two end surfaces.

25. The coating device according to claim 24, characterized in that The first tape attaching assembly includes a first unwinding mechanism, a first glue pulling mechanism and a first cutting mechanism. The first unwinding mechanism is configured to place and release the first tape roll, the first glue pulling mechanism is configured to clamp and pull the head end of the released portion of the first tape roll, and the first cutting mechanism is configured to cut the first tape from the released portion of the first tape roll.

26. The coating device according to claim 25, characterized in that The first glue pulling mechanism includes a first glue clamping cylinder, a first glue pulling motor and a first glue clamping member. The first glue clamping cylinder is used to drive the first glue clamping member to clamp the head end of the release part, and the first glue pulling motor is used to drive the first glue clamping member to move to pull the release part.

27. The coating device according to claim 25, characterized in that The first unwinding mechanism and the first cutting mechanism are two corresponding groups; the first tape attaching assembly includes a switching mechanism, and the switching mechanism includes a material roll holder and a switching motor; two groups of the first unwinding mechanism and the first cutting mechanism are arranged on the material roll holder; The switching motor drives the material roll holder to rotate around a predetermined rotation axis so that the two groups of the first unwinding mechanism and the first cutting mechanism can switch between a standby position and a working position for the first glue pulling mechanism and the first cutting mechanism to operate; the rotation axis is perpendicular to the plane where the release part is located.

28. The coating device according to claim 25, characterized in that The first adhesive tape attaching assembly includes a first adhesive taking mechanism, which is used to absorb and take away the first adhesive tape; the first cutting mechanism includes a first pressing block, a first cutting knife and a first cutting cylinder; the first pressing block and the first cutting knife are relatively fixedly arranged; the first cutting cylinder is configured to drive the first pressing block to press the release part onto the first adhesive taking mechanism, and drive the first cutting knife to cut the first adhesive tape from the release part.

29. The coating device according to claim 25, characterized in that The first adhesive tape attaching assembly includes a first adhesive pickup mechanism, which is used to absorb and remove the first adhesive tape; the first adhesive pickup mechanism includes a first adhesive pickup component, a first adhesive pickup motor, a second adhesive pickup motor, a first adhesive pickup bracket and a second adhesive pickup bracket; the first adhesive pickup component is used to absorb the first adhesive tape; the first adhesive pickup motor is arranged on the first adhesive pickup bracket, and drives the second adhesive pickup bracket to move above the release part; the second adhesive pickup motor is arranged on the second adhesive pickup bracket, and drives the first adhesive pickup component to approach and move away from the plane where the release part is located.

30. The coating device according to claim 29, characterized in that The first glue-taking component includes a first sub-glue-taking portion and a second sub-glue-taking portion; the first sub-glue-taking portion is used to absorb the first part of the first adhesive tape and attach it to the side covering area; the second sub-glue-taking portion is used to absorb the second part of the first adhesive tape and attach it to the end covering area.

31. The coating device according to claim 30, characterized in that The first glue-taking sub-unit is a telescopic part; the second glue-taking motor drives the first glue-taking part along the third direction, and the first glue-taking sub-unit presses the first part of the first adhesive tape on the side covering area and contracts, so that the second glue-taking sub-unit can continue to move along the third direction and fit the end covering area, thereby attaching the second part of the first adhesive tape to the end covering area; or, The second glue-picking sub-part is a telescopic part; the second glue-picking motor drives the first glue-picking part along the second direction, and the second glue-picking sub-part presses the second part of the first adhesive tape on the end covering area and contracts, so that the first glue-picking sub-part can continue to move along the second direction and adhere to the side covering area, thereby attaching the first part of the first adhesive tape to the side covering area.

32. The coating device according to claim 31, characterized in that The first cutting mechanism is configured to cut out two first adhesive tapes from the release portion, the number of the first adhesive parts is two, and they absorb the corresponding first adhesive tapes respectively; the first adhesive tape attaching assembly includes a first adhesive mechanism, the first adhesive mechanism is used to absorb and remove the first adhesive tape, the first adhesive mechanism includes a first adhesive part, a first adhesive motor, a second adhesive motor, a first adhesive bracket, a second adhesive bracket, a third adhesive bracket and a adhesive separation cylinder; the first adhesive part is used to absorb the first adhesive tape; the first adhesive motor is arranged on the first adhesive bracket, and drives the second adhesive bracket to move above the release portion; the second adhesive motor is arranged on the second adhesive bracket, and drives the third adhesive bracket and the two first adhesive parts to approach and move away from the plane where the release portion is located; the adhesive separation cylinder is arranged on the third adhesive bracket, and the adhesive separation cylinder is arranged to drive the two first adhesive parts to move away from each other, so that the two first adhesive parts correspond to the two corners of the electrode assembly spaced apart along the third direction respectively.

33. The coating device according to claim 24, characterized in that The coating device also includes a second tape attaching assembly, which is used to drive the electrode assembly and the second tape to perform relative movement, the second tape includes a first part and a second part connected to each other, and the second tape attaching assembly is arranged to attach the first part of the second tape to the main coating area and the second part of the second tape to the side coating area at a corner formed by the side surface and the main surface.

34. The coating device according to claim 33, characterized in that The number of the first parts of the second tape is two and they are located at both ends of the second part of the second tape. The second tape attaching assembly is configured to attach the two first parts of the second tape to corresponding ones of the two main covering areas respectively.

35. The coating device according to claim 33 or 34, characterized in that The second tape attaching assembly includes a second unwinding mechanism, a second glue pulling mechanism and a second cutting mechanism; the second unwinding mechanism is configured to place and release the second tape roll; the second glue pulling mechanism is configured to clamp and pull the head end of the released part of the second tape roll; the second cutting mechanism is configured to cut the second tape from the released part of the second tape roll.

36. The coating device according to claim 35, characterized in that The second glue pulling mechanism includes a second glue clamping cylinder, a second glue pulling motor and a second glue clamping piece; the second glue clamping cylinder is used to drive the second glue clamping piece to clamp the head end of the release part, and the second glue pulling motor is used to drive the second glue clamping piece to move to pull the release part.

37. The coating device according to claim 35, characterized in that The second unwinding mechanism and the second cutting mechanism are two corresponding groups, and are arranged at intervals along the width direction of the releasing part; the second tape attaching assembly includes a glue pulling bracket, a glue pulling position changing cylinder and a glue pulling position changing bracket, the glue pulling position changing cylinder is arranged on the glue pulling bracket, and the second glue pulling mechanism is arranged on the glue pulling position changing bracket; the glue pulling position changing cylinder is arranged to drive the glue pulling position changing bracket to move along the spacing direction of the two second unwinding mechanisms, so that the second glue pulling mechanism can switch between a standby position and a working position for the second glue pulling mechanism to operate; a group of the second unwinding mechanism and the second cutting mechanism are respectively arranged at the standby position and the working position.

38. The coating device according to claim 35, characterized in that The second adhesive tape attaching assembly includes a second adhesive taking mechanism, which is used to absorb and take away the second adhesive tape; the second cutting mechanism includes a second pressing block, a second cutting knife and a second cutting cylinder; the second pressing block and the second cutting knife are relatively fixedly arranged; the second cutting cylinder is configured to drive the second pressing block to press the release part onto the second adhesive taking mechanism, and drive the second cutting knife to cut the second adhesive tape from the release part.

39. The coating device according to claim 35, characterized in that The second adhesive tape attaching assembly includes a second adhesive pick-up mechanism, which is used to absorb and remove the second adhesive tape; the second adhesive pick-up mechanism includes a second adhesive pick-up component, a fourth adhesive pick-up motor and a fourth adhesive pick-up bracket, and the second adhesive pick-up component is used to absorb the second adhesive tape; the fourth adhesive pick-up motor is arranged on the fourth adhesive pick-up bracket, and drives the second adhesive pick-up component to move to be arranged opposite to the release part along the thickness direction of the release part, and drives the second adhesive pick-up component to approach and move away from the plane where the release part is located.

40. The coating device according to claim 39, characterized in that The second glue-taking component includes a third sub-glue-taking portion and a fourth sub-glue-taking portion; the third sub-glue-taking portion is used to absorb the first part of the second adhesive tape and attach it to the main covering area; the fourth sub-glue-taking portion is used to absorb the second part of the second adhesive tape and attach it to the side covering area.

41. The coating device according to claim 40, characterized in that The fourth glue-taking sub-part is a telescopic part; the fourth glue-taking motor drives the second glue-taking part along the third direction, and the fourth glue-taking sub-part presses the second part of the second adhesive tape on the side covering area and contracts, so that the third glue-taking sub-part can continue to move along the third direction and adhere to the main covering area, thereby attaching the first part of the second adhesive tape to the main covering area.

42. The coating device according to claim 39, characterized in that The second unwinding mechanism and the second cutting mechanism are two corresponding groups, and are arranged at intervals along the width direction of the releasing part; the second glue taking mechanism includes a glue taking and changing position cylinder and a glue taking and changing position bracket; the glue taking and changing position cylinder is arranged on the fourth glue taking bracket, and the second glue taking piece is arranged on the glue taking and changing position bracket; the glue taking and changing position cylinder is arranged to drive the glue taking and changing position bracket to move along the interval direction of the two second unwinding mechanisms, so that the second glue taking piece can be switched between a standby position and a working position for the second glue taking mechanism to operate; a group of the second unwinding mechanism and the second cutting mechanism are respectively arranged at the standby position and the working position.

43. A coating method for an electrode assembly, characterized in that: The electrode assembly includes an electrode body, the electrode body has a first direction, a second direction and a third direction orthogonal to each other, and includes two main surfaces arranged opposite to each other along the first direction, two end surfaces arranged opposite to each other along the second direction, and two side surfaces arranged opposite to each other along the third direction, and the coating method includes: Controlling the unwinding assembly to release the material belt, the material belt comprising a plurality of coating films sequentially connected along the length direction of the material belt, each of the coating films comprising two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas; Controlling the cutting assembly to cut the head end covering film located at the head end of the material strip from the material strip; The first coating component is controlled to coat the connection area of ​​the head end coating film on the first of the two end surfaces, and the two main coating areas are respectively coated on the corresponding one of the two main surfaces to form an electrode coating body.

44. The coating method according to claim 43, characterized in that The controlling first covering component covers the connection area of ​​the head end covering film on the first of the two end surfaces, and covers the two main covering areas on the corresponding one of the two main surfaces respectively, including: Controlling the electrode transmission mechanism to convey the electrode assembly along the second direction so that the first of the two end surfaces contacts the connection area and is conveyed between two pressing roller groups; The two pressing roller groups are controlled to continue to convey the electrode assembly along the first direction in a rolling manner, and the two main coating regions are respectively pressed on a corresponding one of the two main surfaces.

45. The coating method according to claim 43, characterized in that: The material unloading assembly includes two material unloading mechanisms, each of which stores and releases the material tape respectively, wherein the material tape corresponding to the first of the two material unloading mechanisms is used as a working material tape and is fed into the first covering assembly, and the material tape corresponding to the second of the two material unloading mechanisms is used as a spare material tape; The coating method further comprises: Controlling the two pressing mechanisms to cooperate with each other to clamp the working material strip and the spare material strip from both sides of the working material strip and the spare material strip; Controlling the material strip cutting mechanism to cut the working material strip and the spare material strip in a clamped state, so that the working material strip and the spare material strip form an upstream portion and a downstream portion located upstream and downstream of a cutting position of the material strip cutting mechanism, respectively; The two pressing mechanisms are controlled to connect the downstream portion of the working material strip with the upstream portion of the standby material strip.

46. ​​The coating method according to claim 45, characterized in that The controlling the two holding mechanisms to connect the downstream portion of the working material strip with the upstream portion of the standby material strip comprises: Controlling the first of the two pressing mechanisms to simultaneously absorb the downstream portion of the working material strip and the upstream portion of the spare material strip; The second one of the two pressing mechanisms is controlled to apply a connecting tape at a joining position of the downstream portion of the working material tape and the upstream portion of the spare material tape.

47. The coating method according to claim 43, characterized in that The electrode assembly comprises a pole ear portion, the pole ear portion is protrudingly arranged on the first of the two end surfaces, and an opening is arranged on the connection area; The controlling the first covering component to cover the connection area of ​​the head end covering film on the first of the two end surfaces comprises: The first covering component is controlled to allow the pole ear portion to pass through the opening, and the connection area contacts and covers the first one of the two end surfaces.

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