Wrapping apparatus and wrapping method for electrode assembly

Abstract

Disclosed in the present application are a wrapping apparatus and wrapping method for an electrode assembly. The electrode assembly comprises an electrode main body, wherein the electrode main body has a first direction, a second direction and a third direction that are orthogonal to each other, and comprises two main surfaces, two end surfaces and two side surfaces. The wrapping apparatus comprises a first positioning assembly and a first wrapping assembly. The first positioning assembly is configured to position the electrode assembly and keep the two main surfaces exposed. The first wrapping assembly is configured to position a wrapping film. The wrapping film comprises two main wrapping areas and a connecting area. At least one of the first positioning assembly and the first wrapping assembly is configured to be movable relative to the other, such that the connecting area contacts and wraps around the first one of the two end surfaces, and the two main wrapping areas respectively make contact with and wrap around the exposed portions of the corresponding ones of the two main surfaces. In this way, continuous wrapping of a plurality surfaces of the electrode assembly can be achieved.

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 can be used to coat the electrode assembly. During battery production, coating equipment is required to apply the coating film to the electrode assembly. However, existing coating equipment operates in a single process and cannot meet the requirements for continuous coating of multiple surfaces of an electrode assembly.

[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 achieve continuous coating of multiple surfaces of the electrode assembly.

[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 first positioning component and a first coating component. The first positioning component is configured to position the electrode assembly and to keep the two main surfaces at least partially exposed. The first coating component is configured to position the coating film, wherein the coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. At least one of the first positioning component and the first coating component is configured to be movable relative to the other so that the connecting area contacts and coats the first of the two end surfaces, and the two main coating areas contact and coat the exposed portion of the corresponding one of the two main surfaces.

[0007] Through the above method, the relative position relationship between the electrode assembly and the coating film can be adjusted. When the coating film covers the two main surfaces and the first of the two end surfaces of the electrode body, continuous coating of the two main surfaces and the first of the two end surfaces is achieved, which can improve the stability of the coating process and make the coating action more simple and smooth.

[0008] In some embodiments, the relative movement between the first positioning assembly and the first covering assembly is configured such that the connection region contacts the first of the two end surfaces earlier than the two main covering regions contact the corresponding one of the two main surfaces.

[0009] In this way, after the connection area covers the first of the two end surfaces, the two main covering areas respectively cover the two main surfaces, which reduces the difficulty of the covering process and helps to simplify the structure of the covering equipment.

[0010] In some embodiments, the relative movement between the first positioning assembly and the first covering assembly is configured to at least partially synchronize the covering process of the two main covering regions on the corresponding one of the two main surfaces.

[0011] The above method is helpful to simplify the coating process and improve the coating efficiency.

[0012] In some embodiments, before a first of the two end surfaces contacts the connection region, the first cover component is positioned such that the connection region and the two main cover regions are coplanar with each other.

[0013] By adopting the above method, the covering films can be easily stacked and stored, which can reduce the space occupied by the covering films and facilitate the loading of the covering films.

[0014] In some embodiments, the first covering component is configured to make the connection area in a suspended state, and the relative movement between the first positioning component and the first covering component is configured to make the first of the two end surfaces contact the connection area in the suspended state.

[0015] By adopting the above method, the interference in the process of the connection area covering the first of the two end surfaces can be reduced, which is conducive to improving the fit between the connection area and the first of the two end surfaces and improving the covering effect of the connection area on the first of the two end surfaces.

[0016] In some embodiments, 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 pole ear portion is configured to pass through the opening as the first positioning assembly and the first covering assembly move relative to each other.

[0017] In the above manner, the opening can avoid the pole ear portion, which can reduce the interference of the pole ear portion on the coating process, thereby improving the coating effect of the coating film on the first of the two end faces.

[0018] In some embodiments, at least one of the first positioning component and the first covering component is configured to move along the second direction so that the electrode assembly and the covering film approach each other along the second direction, and after the first of the two end surfaces contacts the connection area, the electrode assembly continues to move along the second direction relative to the end of the two main covering areas away from the connection area, and the first covering component is further configured to move along the first direction so that the ends of the two main covering areas approach each other along the first direction, thereby causing the two main covering areas to contact and cover the exposed portion of the corresponding one of the two main surfaces.

[0019] By adopting the above method, the coating film can be smoothly connected between the first of the two end surfaces and the two main surfaces, thereby simplifying the operation of the coating process and improving the coating efficiency.

[0020] In some embodiments, the first positioning assembly includes an electrode clamp configured to clamp the fixed electrode body from outside of two side surfaces along the third direction, or configured to clamp the fixed electrode body from outside of two main surfaces along the first direction.

[0021] By configuring the electrode fixture to clamp and fix the electrode body from the outside of the two side surfaces along the third direction, the electrode fixture can avoid the two main surfaces of the electrode body, which helps increase the exposed area of ​​the two main surfaces and improve the covering effect on the two main surfaces. By configuring the electrode fixture to clamp and fix the electrode body from the outside of the two main surfaces along the first direction, the stability of the electrode fixture in clamping and fixing the electrode body is improved.

[0022] In some embodiments, the first positioning assembly includes an electrode transmission mechanism, which is configured to drive the electrode clamp to move along the second direction toward the side where the coating film is located, so that after the first of the two end faces contacts the connection area, the first of the two end faces and the connection area continue to move synchronously along the second direction.

[0023] By adopting the above-mentioned method, the coating film can be smoothly connected between the first one of the two end surfaces and the two main surfaces, thereby simplifying the operation of the coating process and improving the coating efficiency.

[0024] In some embodiments, the electrode drive mechanism includes an electrode drive motor, a first electrode holder, and a second electrode holder. The electrode drive motor is disposed on the first electrode holder and is configured to drive the second electrode holder to move relative to the first electrode holder in a second direction. The electrode clamp is disposed on the second electrode holder and includes an electrode clamping jaw and an electrode clamping cylinder. The electrode clamping cylinder is configured to drive the electrode clamping jaw to clamp and fix the electrode body.

[0025] The above-mentioned method is conducive to the stable movement of the electrode assembly and can improve the accuracy of positioning the electrode assembly.

[0026] In some embodiments, the first covering assembly includes two first sub-covering assemblies spaced apart from each other, each first sub-covering assembly includes a membrane clamp and a first membrane transmission mechanism, the two membrane clamps respectively clamp and fix the two ends of the covering film away from the connection area, and the first membrane transmission mechanism drives the two membrane clamps closer to each other along the first direction so that the area of ​​the main covering area not clamped by the membrane clamp can be bent toward the corresponding main surface relative to the connection area.

[0027] Through the above method, by setting the two membrane clamps to clamp and fix the two ends of the coating film away from the connection area respectively, it is convenient to control the movement of the main coating area, which is beneficial for the area of ​​the main coating area not clamped by the membrane clamp to maintain an extended state, and facilitates the action of the main coating area covering the main surface, thereby improving the coating effect of the main coating area on the main surface.

[0028] In some embodiments, the first film drive mechanism includes a first film drive motor, a first film support, and a second film support. The first film drive motor is disposed on the first film support and is configured to drive the second film support to move relative to the first film support in a first direction. The film clamp is disposed on the second film support and includes a film clamping jaw and a film clamping cylinder. The film clamping cylinder is configured to drive the film clamping jaw to clamp and secure the coating film.

[0029] The above-mentioned method is beneficial to the stable movement of the covering film and can improve the accuracy of positioning the covering film.

[0030] In some embodiments, each first sub-wrapping assembly also includes a second membrane transmission mechanism, and the two second membrane transmission mechanisms respectively drive the corresponding membrane clamps to rotate so that the movement trend of the area of ​​the wrapping film clamped by the membrane clamp relative to the connection area is consistent with the bending trend of the unclamped area of ​​the main wrapping area relative to the connection area.

[0031] By adopting the above method, the area of ​​the coating film clamped by the film clamp can be brought closer to the electrode body, which facilitates the coating of the area of ​​the coating film clamped by the film clamp on the electrode body.

[0032] In some embodiments, the first film drive mechanism includes a first film drive motor, a first film support, and a second film support. The first film drive motor is disposed on the first film support and is configured to drive the second film support to move relative to the first film support in a first direction. The second film drive mechanism includes a second film drive motor, which is disposed on the second film support and drives a film clamp to rotate. The film clamp includes a film clamping jaw and a film clamping cylinder. The film clamping cylinder is configured to drive the film clamping jaw to clamp and secure the coating film.

[0033] By adopting the above method, the movement freedom of the coating film can be improved, thereby enhancing the coating effect.

[0034] In some embodiments, each first sub-wrapping assembly further includes a third membrane transmission mechanism, and the two third membrane transmission mechanisms respectively transmit the corresponding membrane clamps to move along the second direction toward the side where the electrode body is located. Alternatively, the first positioning assembly includes an electrode clamp and an electrode transmission mechanism, the electrode clamp is configured to clamp and fix the electrode body, and the electrode transmission mechanism is configured to transmit the electrode assembly to move along the second direction toward the side where the covering membrane is located, so that after the first of the two end faces contacts the connection area, the first of the two end faces and the connection area continue to move synchronously along the second direction, and after the first of the two end faces contacts the connection area, the third membrane transmission mechanism transmits the corresponding membrane clamp along the second direction to move along the second direction toward the side away from the electrode body.

[0035] By means of the above method, the projections of the two main covering areas on the corresponding main surfaces along the first direction can gradually cover the exposed parts of the main surfaces, thereby facilitating covering of the main surfaces by the main covering areas.

[0036] In some embodiments, the first membrane drive mechanism includes a first membrane drive motor, a first membrane support, and a second membrane support. The first membrane drive motor is disposed on the first membrane support and is configured to drive the second membrane support to move relative to the first membrane support in a first direction. The third membrane drive mechanism includes a third membrane drive motor and a third membrane support. The third membrane drive motor is disposed on the second membrane support and drives the third membrane support to move relative to the second membrane support in a second direction. The second membrane drive mechanism includes a second membrane drive motor, which is disposed on the third membrane support and drives a membrane clamp to rotate. The membrane clamp includes a membrane clamping jaw and a membrane clamping cylinder. The membrane clamping cylinder is configured to drive the membrane clamping jaw to clamp and secure the coating film.

[0037] By adopting the above method, the movement freedom of the coating film can be further improved, thereby improving the coating effect.

[0038] In some embodiments, the coating device further includes a second positioning assembly configured to clamp and fix the coating film and the electrode body from outside the two main coating regions.

[0039] By adopting the above-mentioned method, the main covering area can be restricted from being separated from the main surface of the electrode body, thereby improving the stability of the main covering area covering the main surface of the electrode body.

[0040] In some embodiments, the second positioning component is a carrying fixture that can move synchronously with the covering film and the electrode body.

[0041] By adopting the above method, the coating film and the electrode body can be easily transferred between different workstations, thereby improving the stability of the coating process of the electrode body by the main coating film.

[0042] In some embodiments, the first positioning assembly is configured to insert the electrode body and the covering film into the second positioning assembly along the second direction.

[0043] Through the above method, the first positioning component and the second positioning component can alternately position the electrode assembly, which can make the movement of the electrode assembly between different workstations smoother, and at the same time simplify the action and structure of the second positioning component to position the electrode assembly, which is conducive to improving the coating efficiency.

[0044] In some embodiments, each second positioning assembly includes a fixed bracket, an opening and closing mechanism, and two limiting members. The two limiting members are movably disposed on the fixed bracket along a first direction, and define a limiting gap therebetween, through which the electrode body and the covering film are inserted. The opening and closing mechanism is configured to drive the two limiting members toward or away from each other.

[0045] By adopting the above-mentioned method, the electrode body and the coating film can be easily inserted into the limiting gap, and the clamping effect of the electrode body and the coating film can be improved.

[0046] In some embodiments, each opening and closing mechanism includes an elastic member and an opening mechanism. The elastic member is disposed between the two limiting members and is configured to elastically drive the two limiting members toward each other, and the opening mechanism is configured to drive the two limiting members away from each other.

[0047] In the above manner, by providing the elastic member, the second positioning assembly can adaptively adjust the clamping force between the electrode body and the coating film.

[0048] In some embodiments, the opening and closing mechanism includes a rotating member, with two ends of the rotating member respectively connected to the two limiting members. The central region of the rotating member is configured to be rotatably connected to the fixed bracket, and the rotating member is further configured to drive the other limiting member to move in the opposite direction when the first of the two limiting members moves in the first direction.

[0049] In the above manner, by providing a rotating member, the two limiting members can achieve synchronous movement with opposite movement directions.

[0050] In some embodiments, the covering film includes a side covering area connected to the main covering area, and the covering device further includes a second covering component configured to contact the side covering area and cover the side surface.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] By adopting the above-mentioned method, the coating effect of the coating film on the electrode body can be improved.

[0056] 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.

[0057] 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.

[0058] In some embodiments, the first platen transmission mechanism includes a platen transmission motor, a first platen bracket, and a second platen bracket. The platen transmission motor is mounted on the first platen bracket and drives the second platen bracket to move relative to the first platen bracket. The second platen transmission mechanism includes a first platen cylinder mounted on the second platen bracket and drives the side platen to move relative to the second platen bracket. The third platen transmission mechanism includes a second platen cylinder mounted on the second platen bracket and drives the end platen to move relative to the second platen bracket.

[0059] By adopting the above method, the freedom of movement of the side pressure plates and the end pressure plates can be improved, which is beneficial to improving the covering effect.

[0060] 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 attach a first tape on the electrode assembly. The first tape includes a first part and a second part connected to each other. The first tape attaching assembly is configured 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.

[0061] 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.

[0062] 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.

[0063] The above method is conducive to automatically providing the first adhesive tape.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The above method is conducive to quickly performing the roll-changing operation of the first tape roll, and can improve the roll-changing efficiency.

[0068] 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.

[0069] In the above manner, the first pressing block can press and position the released portion, thereby improving the stability of the cutting process.

[0070] 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 laterally to the main surface of 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.

[0071] 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.

[0072] 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.

[0073] Through the above method, the continuity of the glue taking action and the glue applying action can be improved.

[0074] 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.

[0075] 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.

[0076] In some embodiments, the first cutting mechanism is configured to cut out two first adhesive tapes from the release portion. The first adhesive tape attaching assembly includes a first adhesive taking mechanism, which is used to absorb and remove the first adhesive tape. The first adhesive taking mechanism includes a first adhesive taking part, a first adhesive taking motor, a second adhesive taking motor, a first adhesive taking bracket, a second adhesive taking bracket, a third adhesive taking bracket and a adhesive dispensing cylinder. There are two first adhesive taking parts, and they respectively absorb the corresponding first adhesive tapes. The first adhesive taking motor is arranged on the first adhesive taking bracket, and drives the second adhesive taking bracket to move to the side of the main surface of the release portion. The second adhesive taking motor is arranged on the second adhesive taking bracket, and drives the third adhesive taking bracket and the two first adhesive taking parts to approach and move away from the plane where the release portion is located. The adhesive dispensing cylinder is arranged on the third adhesive taking bracket, and the adhesive dispensing cylinder is arranged to drive the two first adhesive taking parts away from each other so that the two first adhesive taking parts correspond to the two corners of the electrode assembly spaced apart along the third direction.

[0077] 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.

[0078] In some embodiments, the coating device also includes a second tape attaching assembly, which is used to attach a second tape to the electrode assembly, the second tape including a first part and a second part connected to each other, and the second tape attaching assembly is configured 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The above method is conducive to automatically providing the second adhesive tape.

[0084] 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.

[0085] 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.

[0086] In some embodiments, the second unwinding mechanism and the second cutting mechanism are provided in two corresponding groups and are spaced apart along the width direction of the release portion. The second tape applying assembly includes a tape drawing bracket, a tape drawing and shifting cylinder, and a tape drawing and shifting bracket. The tape drawing and shifting cylinder is provided on the tape drawing bracket, and the second tape drawing mechanism is provided on the tape drawing and shifting bracket. The tape drawing and shifting cylinder is configured to drive the tape drawing and shifting bracket to move along the spacing direction between the two second unwinding mechanisms, so that the second tape drawing mechanism can switch between the two groups of the second unwinding mechanism and the second cutting mechanism.

[0087] 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.

[0088] 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.

[0089] In the above manner, the second pressing block can press and position the released portion, thereby improving the stability of the cutting process.

[0090] 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 laterally of the main surface of the release portion, and drives the second adhesive dispensing member toward and away from the plane of the release portion.

[0091] By adopting the above-mentioned method, the movement freedom of the second adhesive removal component can be improved, thereby facilitating the suction and transfer of the second adhesive tape.

[0092] 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.

[0093] Through the above method, the continuity of the glue taking action and the glue applying action can be improved.

[0094] 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.

[0095] 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.

[0096] In some embodiments, the second unwinding mechanism and the second cutting mechanism are provided in two corresponding groups and are spaced apart along the width of the release portion. The second glue dispensing mechanism includes a glue dispensing and shifting cylinder and a glue dispensing and shifting bracket. The glue dispensing and shifting cylinder is provided on the fourth glue dispensing bracket, and the second glue dispensing member is provided on the glue dispensing and shifting bracket. The glue dispensing and shifting cylinder is configured to drive the glue dispensing and shifting bracket to move along the spacing between the two second unwinding mechanisms, thereby switching the second glue dispensing member between the two groups of the second unwinding mechanism and the second cutting mechanism.

[0097] 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.

[0098] In some embodiments, the second tape applying assembly includes a third positioning assembly, which includes a main pressing cylinder, a main pressing member, a side pressing cylinder, and a side pressing member. The main pressing cylinder is configured to drive the main pressing member to press the main covering area and the main surface, and the side pressing cylinder is configured to drive the side pressing member to press the side covering area and the side surface.

[0099] Through the above method, the stability of the glue application process can be improved.

[0100] In some embodiments, the third positioning assembly includes a rotary motor and a rotary bracket. The main holding cylinder, the main holding member, the side holding cylinder, and the side holding member are disposed on the rotary bracket. The rotary motor is configured to drive the rotary bracket to rotate. The axis of rotation of the rotary bracket is parallel to the second direction.

[0101] By adopting the above-mentioned method, the freedom of movement of the electrode assembly can be improved, and it is convenient to stick the second tape at different positions of the electrode assembly.

[0102] In some embodiments, the second tape applying assembly includes two second unwinding mechanisms. The third positioning assembly includes a shift motor and a shift bracket, wherein a main holding cylinder, a main holding member, a side holding cylinder, a side holding member, a rotary motor, and a rotary bracket are disposed on the shift bracket. The shift motor is configured to drive the shift bracket to move in a direction spaced apart from the two second unwinding mechanisms.

[0103] In the above manner, by setting the shift motor to drive the shift bracket to move along the spacing direction of the two second unwinding mechanisms, the position of the electrode assembly can correspond to the position of a group of second unwinding mechanisms and second cutting mechanisms that are working, thereby facilitating the gluing operation.

[0104] In some embodiments, the electrode body includes two electrode modules stacked on each other along a first direction, and each electrode module includes a positive electrode sheet, a separator, and a negative electrode sheet arranged in sequence.

[0105] The above method is beneficial to improving the space utilization of the electrode assembly and increasing the energy storage density of the electrode assembly.

[0106] In a 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 comprising: using a first positioning component to position the electrode assembly, and making the two main surfaces at least partially exposed. Using a first coating component to position a coating film, wherein the coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. Controlling at least one of the first positioning component and the first coating component to move relative to the other so that the connecting area contacts and coats the first of the two end surfaces, and the two main coating areas respectively contact and coat the corresponding one of the two main surfaces on the exposed portion from the first positioning component.

[0107] In some embodiments, controlling the movement of at least one of the first positioning component and the first covering component relative to the other includes: controlling the relative movement of the first positioning component and the first covering component so that the contact time of the connection area with the first of the two end surfaces is earlier than the contact time of the two main covering areas with the corresponding one of the two main surfaces, and / or controlling the relative movement of the first positioning component and the first covering component so that the covering process of the two main covering areas on the corresponding one of the two main surfaces is at least partially synchronized.

[0108] In some embodiments, controlling at least one of the first positioning assembly and the first covering assembly to move relative to the other includes: controlling at least one of the first positioning assembly and the first covering assembly to move in a second direction so that the electrode assembly and the covering film approach each other in the second direction, and after the first of the two end surfaces contacts the connection region, the electrode assembly continues to move in the second direction relative to the ends of the two main covering regions away from the connection region. Controlling the first covering assembly to move in the first direction so that the ends of the two main covering regions approach each other in the first direction, thereby causing the two main covering regions to contact and cover the exposed portion of the corresponding one of the two main surfaces.

[0109] In some embodiments, the electrode assembly includes a pole ear portion, the pole ear portion protruding from a first of the two end surfaces, and an opening is provided on the connection area. Positioning the coating film using the first coating assembly includes: positioning the electrode assembly using the first positioning assembly so that the pole ear portion is positioned toward the connection area. Controlling the relative movement of at least one of the first positioning assembly and the first coating assembly relative to the other includes: controlling the relative movement of the first positioning assembly and the first coating assembly so that the pole ear portion passes through the opening as the first positioning assembly and the first coating assembly move relative to each other, and the connection area contacts and coats the first of the two end surfaces.

[0110] 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

[0111] 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:

[0112] FIG1 is a schematic structural diagram of a vehicle to which an electrode assembly according to one or more embodiments is applied;

[0113] 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;

[0114] 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;

[0115] FIG4 is a schematic diagram of a partial structure of an electrode assembly according to one or more embodiments;

[0116] 5 is a schematic structural diagram of a first positioning assembly and a first covering assembly transmitting a covering film and an electrode assembly according to one or more embodiments;

[0117] 6 is a schematic structural diagram of a first positioning assembly and a first covering assembly transmitting a covering film and an electrode assembly according to one or more embodiments;

[0118] FIG7 is a schematic diagram of a process of coating an electrode assembly with a coating film according to one or more embodiments;

[0119] FIG8 is a schematic structural diagram of a first positioning assembly according to one or more embodiments;

[0120] FIG9 is a schematic diagram of a partial structure of a first covering component according to one or more embodiments;

[0121] FIG10 is a schematic structural diagram of a second positioning assembly positioning an electrode assembly according to one or more embodiments;

[0122] FIG11 is a bottom view of the second positioning assembly according to one or more embodiments;

[0123] FIG12 is a schematic structural diagram of a second coating assembly transmission coating film and an electrode assembly according to one or more embodiments;

[0124] FIG13 is a schematic structural diagram of a second covering component according to one or more embodiments;

[0125] FIG14 is a schematic diagram of the partial structure of the transmission coating film and the electrode assembly of the second coating assembly shown in FIG12;

[0126] FIG15 is a schematic structural diagram of the coating film and electrode assembly shown in FIG12;

[0127] FIG16 is a simplified schematic diagram of the structure of a coating device according to one or more embodiments;

[0128] FIG17 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;

[0129] FIG18 is a schematic structural diagram of a first tape applying assembly according to one or more embodiments;

[0130] FIG19 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;

[0131] FIG20 is a schematic structural diagram of a first glue-dispensing mechanism according to one or more embodiments;

[0132] FIG21 is a partial structural diagram of a first glue pulling mechanism according to one or more embodiments;

[0133] FIG22 is a schematic structural diagram of a first cutting mechanism according to one or more embodiments;

[0134] FIG23 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;

[0135] FIG24 is a schematic diagram of the matching structure of the second tape applying assembly and the electrode assembly according to one or more embodiments;

[0136] FIG25 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;

[0137] FIG26 is a schematic structural diagram of a second glue pulling mechanism according to one or more embodiments;

[0138] FIG27 is a schematic diagram showing the structure of a second adhesive dispensing mechanism adsorbing a second adhesive tape according to one or more embodiments;

[0139] FIG28 is a schematic diagram of the partial structure of the second adhesive-taking mechanism shown in FIG27 adsorbing the second adhesive tape;

[0140] FIG29 is a schematic structural diagram of a second cutting mechanism according to one or more embodiments;

[0141] FIG30 is a schematic structural diagram of a third positioning assembly positioning an electrode assembly according to one or more embodiments;

[0142] FIG31 is a schematic structural diagram of an electrode assembly according to one or more embodiments.

[0143] The 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; 223 negative electrode sheet; 230 fixing member; 300 coating equipment; 301 coating film loading mechanism; 302 electrode assembly unloading mechanism; 303 jig conveyor line; 304 robot track; 305 dust removal mechanism; 310 first positioning assembly; 311 electrode clamp; 312 electrode transmission mechanism; 313 electrode clamping cylinder; 3131 electrode clamping jaw; 314 electrode transmission motor; 3141 first electrode support; 3142 second electrode support; 330 first covering assembly; 331 first sub-covering assembly; 332 membrane clamp; 333 first membrane transmission mechanism; 334 second membrane transmission mechanism; 335 third membrane transmission mechanism; 336 membrane clamping cylinder; 337 first membrane transmission motor; 3371 first membrane support; 338 membrane clamping jaw; 339 fourth membrane support; 340 second membrane transmission motor; 341 third membrane transmission motor; 342 second membrane support; 343 third membrane support; 350 second positioning assembly; 351 fixed support; 353 limiting member; 354 ​​limiting gap; 355 elastic member; 356 hook plate; 357 rotating member; 360 Third positioning 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 adhesive 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 adhesive dispensing sub-unit; 3867 Second adhesive dispensing sub-unit;3868 Third glue dispensing bracket; 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 dispensing bracket; 3941 Glue dispensing shifting cylinder; 3942 Glue dispensing 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 shifting cylinder; 3957 Glue dispensing shifting bracket; 396 Second tape roll; 397 Second glue dispensing mechanism; 400 Covering film; 410 Main covering area; 420 Connecting area; 421 Opening; 430 Side covering area; 440 End covering 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 between two second unwinding mechanisms; D6 Thickness direction of release portion. [Specific implementation method]

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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).

[0150] 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.

[0151] 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.

[0152] 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.

[0153] Batteries often feature an electrode assembly and a coating film. The coating film acts as an insulator and can be used to coat the electrode assembly. During battery production, coating equipment is required to apply the coating film to the electrode assembly. However, existing coating equipment operates in a single process and cannot meet the requirements for continuous coating of multiple surfaces of an electrode assembly.

[0154] In order to meet the requirements of continuous coating of multiple surfaces of the electrode assembly, the first positioning assembly is configured to position the electrode assembly, so that the position and posture of the electrode assembly can be kept stable and controlled, and the first coating assembly is configured to position the coating film, so that the position and posture of the two main coating areas and the connecting area can be kept stable and controlled. At least one of the first positioning assembly and the first coating assembly is configured to drive the electrode assembly and the coating film to move relative to each other, which can adjust 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, thereby achieving continuous coating of the two main surfaces and the first of the two end surfaces of the electrode assembly.

[0155] 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 having a first direction, a second direction and a third direction orthogonal to each other, and including 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 device includes a first positioning component and a first coating component. The first positioning component is configured to position the electrode assembly and to keep the two main faces at least partially exposed. The first coating component is configured to position the coating film, wherein the coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. At least one of the first positioning component and the first coating component is configured to be movable relative to the other so that the connecting area contacts and coats the first of the two end faces, and the two main coating areas contact and coat the exposed portion of the corresponding one of the two main faces. In this way, the relative position relationship between the electrode assembly and the coating film can be adjusted. When the coating film covers the two main surfaces and the first of the two end surfaces of the electrode body, continuous coating of the two main surfaces and the first of the two end surfaces is achieved, which can improve the stability of the coating process and make the coating action simpler and smoother.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] In some embodiments, the battery 100a may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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 .

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] Optionally, the battery cell 1 includes a housing 100, a bottom cover, and an electrode assembly 200. The housing 100 has an open end 112. A terminal post is disposed on the wall of the housing 100 opposite the open end 112. The terminal post has a through-hole. The housing and bottom cover are connected to form a receiving cavity that communicates with the through-hole. The active material coating portion of the electrode assembly 200 is disposed within the housing 100. The tab portion 201 of the electrode assembly 200 passes through the through-hole and connects to the side of the terminal post facing away from the receiving cavity.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.).

[0179] 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 0.3 O2 (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.

[0180] 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.

[0181] 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.).

[0182] As an example, the negative electrode sheet 223 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.

[0183] 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.

[0184] As an example, the negative electrode active material may adopt the negative electrode active material for battery cell 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, lithium titanate, etc. 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.

[0185] 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.

[0186] In some embodiments, the electrode assembly 200 further includes a separator disposed between the positive electrode and the negative electrode.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] The electrolyte may be a form of electrolyte and may include an electrolyte salt and a solvent.

[0192] 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.

[0193] 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.

[0194] Among them, the gel electrolyte includes a skeleton network with a polymer as the electrolyte, combined with an ionic liquid-lithium salt.

[0195] Among them, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0196] 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.

[0197] 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.

[0198] As an example, a composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0199] In some embodiments, the electrode assembly 200 is a wound structure, wherein the positive electrode sheet 221 and the negative electrode sheet 223 are wound into a wound structure.

[0200] 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.

[0201] According to some embodiments of the present application, as shown in Figures 5 to 7, the electrode assembly 200 described in the embodiment of the coating device 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 device 300 includes a first positioning component 310 and a first coating component 330. The first positioning component 310 is configured to position the electrode assembly 200 and to keep the two main surfaces 211 at least partially exposed. The first coating component 330 is configured to position the coating film 400, wherein the 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. At least one of the first positioning component 310 and the first covering component 330 is configured to move relative to the other so that the connection area 420 contacts and covers the first one 212a of the two end surfaces 212, and the two main covering areas 410 respectively contact and cover the exposed portion of the corresponding one of the two main surfaces 211.

[0202] 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.

[0203] The first positioning assembly 310 and the first coating assembly 330 can drive the electrode assembly 200 and the coating film 400 to perform relative movement. When the first positioning assembly 310 positions the electrode assembly 200, the first positioning assembly 310 can act on the electrode assembly 200 at the second of the two main surfaces 211, the two side surfaces 213, or the two end surfaces 212 212. When the first positioning assembly 310 acts on the electrode assembly 200 at the two main surfaces 211, the two main surfaces 211 are partially exposed. When the first positioning assembly 310 acts on the electrode assembly 200 at the second of the two side surfaces 213 or the two end surfaces 212 212 b, the two main surfaces 211 can be fully exposed.

[0204] By setting the first positioning component 310 and the first covering component 330, the relative position relationship between the two main surfaces 211 and the two covering areas, 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 covering film 400 covers 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 covering process can be improved, making the covering action more simple and smooth.

[0205] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the relative movement between the first positioning component 310 and the first covering component 330 is configured so that the contact time of the connection area 420 with the first one 212a of the two end surfaces 212 is earlier than the contact time of the two main covering areas 410 with the corresponding one of the two main surfaces 211.

[0206] The action of the connection area 420 covering the first one 212a of the two end surfaces 212 differs significantly from the action of the two main covering areas 410 covering the two main surfaces 211, making it difficult to perform them simultaneously. If the connection area 420 contacts the first one 212a of the two end surfaces 212 later than the contact time of the two main covering areas 410 with the corresponding one of the two main surfaces 211, the movement of the connection area 420 is restricted by the two main covering areas 410, making it difficult for the connection area 420 to cover the first one 212a of the two end surfaces 212. By setting the contact time between the connection area 420 and the first one 212a of the two end surfaces 212 to be earlier than the contact time between the two main covering areas 410 and the corresponding one of the two main surfaces 211, the two main covering areas 410 can respectively cover the two main surfaces 211 after the connection area 420 covers the first one 212a of the two end surfaces 212, thereby reducing the difficulty of the covering process and helping to simplify the structure of the covering equipment 300.

[0207] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the relative movement between the first positioning assembly 310 and the first covering assembly 330 is configured to make the covering process of the two main covering areas 410 on the corresponding one of the two main surfaces 211 at least partially synchronized.

[0208] The two main coating zones 410 each coat the two main surfaces 211 with minimal difference in their movements, allowing them to be at least partially performed simultaneously. This arrangement helps simplify the coating process and improve coating efficiency. Furthermore, the two main coating zones 410 coat the corresponding one of the two main surfaces 211 simultaneously.

[0209] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, before the first one 212a of the two end surfaces 212 contacts the connection area 420, the first covering component 330 is configured so that the connection area 420 and the two main covering areas 410 are coplanar with each other.

[0210] By arranging the connection area 420 and the two main covering areas 410 to be coplanar with each other, it is convenient to stack and store the covering films 400, reduce the space occupied by the covering films 400, and facilitate the loading of the covering films 400. For example, the first covering component 330 stretches the covering film 400 by pulling it, thereby making the connection area 420 and the two main covering areas 410 coplanar with each other.

[0211] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the first covering component 330 is configured so that the connection area 420 is in a suspended state, and the relative movement between the first positioning component 310 and the first covering component 330 is configured so that the first one 212a of the two end faces 212 contacts the connection area 420 in a suspended state.

[0212] By setting the connection area 420 to be in a suspended state, the interference in the process of the connection area 420 covering the first one 212a of the two end surfaces 212 can be reduced, which is beneficial to improving the fit between the connection area 420 and the first one 212a of the two end surfaces 212, and improving the covering effect of the connection area 420 on the first one 212a of the two end surfaces 212.

[0213] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the electrode assembly 200 also includes a pole ear portion 201 protruding from the first one 212a of the two end surfaces 212, and an opening 421 is provided on the connection area 420, and the pole ear portion 201 is configured to pass through the opening 421 as the first positioning assembly 310 and the first covering assembly 330 move relative to each other.

[0214] The relative movement of the first positioning assembly 310 and the first covering assembly 330 allows for relative movement between the electrode assembly 200 and the covering film 400. The presence of the electrode ear 201 increases the difficulty of the covering film 400 covering the first 212a of the two end surfaces 212. The opening 421 provided in the connecting region 420 allows for the electrode ear 201 to be avoided, reducing interference with the covering process and thereby improving the covering effect of the covering film 400 on the first 212a of the two end surfaces 212.

[0215] 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.

[0216] 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.

[0217] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, at least one of the first positioning component 310 and the first covering component 330 is configured to move along the second direction D2, so that the electrode assembly 200 and the covering film 400 approach each other along the second direction D2, and after the first 212a of the two end surfaces 212 contacts the connection area 420, the electrode assembly 200 continues to move along the second direction D2 relative to the two main covering areas 410 away from the end of the connection area 420, and the first covering component 330 is also configured to move along the first direction D1, so that the ends of the two main covering areas 410 approach each other along the first direction D1, thereby making the two main covering areas 410 contact and cover the exposed portion of the corresponding one of the two main surfaces 211.

[0218] Specifically, the first positioning component 310 can drive the electrode assembly 200 along the second direction D2 to approach the covering film 400, or the first covering component 330 can drive the covering film 400 along the second direction D2 to approach the electrode assembly 200, or the first positioning component 310 drives the electrode assembly 200 along the second direction D2 to approach the covering film 400 while the first covering component 330 drives the covering film 400 along the second direction D2 to approach the electrode assembly 200, so that the electrode assembly 200 and the covering film 400 approach each other along the second direction D2 until the first one 212a of the two end surfaces 212 contacts the connection area 420 and is covered.

[0219] The two main surfaces 211 can be connected between the two end surfaces 212 along the second direction D2. After the first one 212a of the two end surfaces 212 contacts the connection area 420, by driving the electrode assembly 200 to continue to move along the second direction D2 relative to the two main covering areas 410 away from the end of the connection area 420, the projections of the two main covering areas 410 on the corresponding main surfaces 211 along the first direction D1 can gradually cover the exposed parts of the main surfaces 211. At this time, the first covering assembly 330 can make the two main covering areas 410 contact and cover the exposed parts of the corresponding one of the two main surfaces 211 by respectively driving the ends of the two main covering areas 410 closer to each other along the first direction D1.

[0220] Such a configuration allows the coating film 400 to smoothly connect between the first one 212 a of the two end surfaces 212 and the two main surfaces 211 , thereby simplifying the coating process and improving the coating efficiency.

[0221] According to some embodiments of the present application, optionally, as shown in Figures 5, 6 and 8, the first positioning assembly 310 includes an electrode clamp 311, which is configured to clamp the fixed electrode body 210 from the outside of the two side surfaces 213 along the third direction D3, or to clamp the fixed electrode body 210 from the outside of the two main surfaces 211 along the first direction D1.

[0222] When the electrode fixture 311 clamps the fixed electrode body 210, the electrode fixture 311 and the electrode body 210 can remain relatively fixed. By setting the electrode fixture 311 to clamp the fixed electrode body 210, the first positioning assembly 310 can position the electrode assembly 200. By setting the electrode fixture 311 to clamp the fixed electrode body 210 from the outside of the two side surfaces 213 along the third direction D3, the electrode fixture 311 can avoid the two main surfaces 211 of the electrode body 210, which is beneficial to increase the exposed area of ​​the two main surfaces 211 and improve the covering effect of the two main surfaces 211. The area of ​​the two main surfaces 211 is larger than the area of ​​the two side surfaces 213. By setting the electrode fixture 311 to clamp the fixed electrode body 210 from the outside of the two main surfaces 211 along the first direction D1, it is beneficial to improve the stability of the electrode fixture 311 in clamping the fixed electrode body 210.

[0223] Furthermore, the electrode body 210 includes two electrode modules 220 described below. By setting the electrode clamp 311 to clamp the fixed electrode body 210 from the outside of the two main surfaces 211 along the first direction D1, it is beneficial to keep the two electrode modules 220 relatively fixed, thereby improving the stability of the electrode clamp 311 clamping the fixed electrode body 210.

[0224] Optionally, as shown in FIG5 and FIG8 , the electrode clamp 311 is in transmission connection with the electrode clamping cylinder 313 , and the electrode clamping cylinder 313 can control the electrode clamp 311 to clamp or release the electrode body 210 .

[0225] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the first positioning assembly 310 includes an electrode transmission mechanism 312, and the electrode transmission mechanism 312 is configured to drive the electrode clamp 311 to move along the second direction D2 toward the side where the coating film 400 is located, so that after the first one 212a of the two end faces 212 contacts the connection area 420, the first one 212a of the two end faces 212 and the connection area 420 continue to move synchronously along the second direction D2.

[0226] The electrode transmission assembly can provide power for the electrode assembly 200 to move along the second direction D2. This configuration allows the coating film 400 to smoothly connect between the first one 212a of the two end surfaces 212 and the two main surfaces 211, simplifying the coating process and improving the coating efficiency.

[0227] Furthermore, the electrode transmission mechanism 312 may be in transmission connection with the electrode fixture 311. The electrode transmission mechanism 312 may drive the electrode assembly 200 to move along the second direction D2 by driving the electrode fixture 311 to move along the second direction D2.

[0228] Optionally, the electrode drive mechanism 312 includes an electrode drive motor 314, a screw, and a slider. The electrode drive motor 314 drives the screw to rotate. The slider is sleeved around the screw and threadably engaged with the screw. The slider is fixed relative to the electrode assembly 200, with the screw's rotation axis parallel to the second direction D2. When the electrode drive motor 314 drives the screw to rotate, it drives the slider to move along the screw's rotation axis, thereby driving the electrode assembly 200 to move in the second direction D2.

[0229] According to some embodiments of the present application, optionally, as shown in Figures 5 and 8, the electrode drive mechanism 312 includes an electrode drive motor 314, a first electrode support 3141, and a second electrode support 3142. The electrode drive motor 314 is disposed on the first electrode support 3141, and the electrode drive motor 314 is configured to drive the second electrode support 3142 to move relative to the first electrode support 3141 along the second direction D2. The electrode clamp 311 is disposed on the second electrode support 3142 and includes an electrode clamping claw 3131 and an electrode clamping cylinder 313. The electrode clamping cylinder 313 is configured to drive the electrode clamping claw 3131 to clamp and fix the electrode body 210.

[0230] Such a configuration is beneficial to the stable movement of the electrode assembly 200 and can improve the accuracy of positioning the electrode assembly 200.

[0231] In some embodiments, the first covering assembly 330 includes a support frame, a support transmission mechanism, and two spaced support plates. The support transmission mechanism and the two support plates are disposed on the support frame, one end of each support plate being rotatably connected to the support frame, and the support transmission mechanism is used to drive the two support plates to rotate relative to the support frame, so that the two support plates can switch between a flat state and an opposed state. The two support plates each have a support plane. In the flat state, the two support planes face the same direction and are coplanar. The two support planes are used to support a main covering area 410, respectively, so that the connection area 420 and the two main covering areas 410 are coplanar with each other. The two support plates are spaced apart so that the connection area 420 is in a suspended state. In the opposed state, the two support planes are spaced and opposite to each other, so that the two main covering areas 410 supported by the two support planes are bent relative to the connection area 420. In this way, the two support plates switch from the flat state to the opposed state, so that the two main covering areas 410 can cover the two main surfaces 211.

[0232] Optionally, the two support plates each have an adsorption structure, and the adsorption structure is used to keep the main covering area 410 relatively fixed to the support plate by adsorbing the main covering area 410 .

[0233] According to some embodiments of the present application, optionally, as shown in Figures 5 to 7, the first covering component 330 includes two first sub-covering components 331 spaced apart from each other, each first sub-covering component 331 respectively including a membrane clamp 332 and a first membrane transmission mechanism 333, the two membrane clamps 332 respectively clamp and fix the two ends of the covering film 400 away from the connection area 420, and the first membrane transmission mechanism 333 drives the two membrane clamps 332 closer to each other along the first direction D1, so that the area of ​​the main covering area 410 not clamped by the membrane clamp 332 can be bent toward the corresponding main surface 211 relative to the connection area 420.

[0234] In some embodiments, the ends of the covering film 400 away from the connection region 420 may be located in the two main covering regions 410, in which case the main covering regions 410 are clamped by the film clamp 332. In other embodiments, the ends of the covering film 400 away from the connection region 420 may be located outside the two main covering regions 410, in which case the main covering regions 410 are not clamped by the film clamp 332. For example, the covering film 400 includes the following end covering regions 440, and the ends of the covering film 400 away from the connection region 420 may be located in the end covering regions 440.

[0235] When the first film transmission mechanism 333 drives the two film clamps 332 toward each other along the first direction D1, the two film clamps 332 can drive the ends of the coating film 400 away from the connection area 420 toward each other, thereby driving the two main coating areas 410 toward the corresponding main surfaces 211. When the main coating areas 410 are moved toward the corresponding main surfaces 211, the areas of the main coating areas 410 not clamped by the film clamps 332 can bend relative to the connection area 420.

[0236] In the first direction D1, the forces exerted by the two membrane clamps 332 on the connection area 420 through the two main covering areas 410 can offset each other, so that the connection area 420 can remain relatively fixed with the electrode body 210 after contacting the electrode body 210. At the same time, in the second direction D2, the connection area 420 is supported by the electrode body 210, so that the connection area 420 can serve as a fulcrum for bending the area of ​​the main covering area 410 that is not clamped by the membrane clamp 332.

[0237] By setting the two membrane clamps 332 to clamp and fix the two ends of the covering membrane 400 away from the connection area 420 respectively, it is convenient to control the movement of the main covering area 410, which is beneficial for the area of ​​the main covering area 410 not clamped by the membrane clamp 332 to remain in an extended state, facilitating the main covering area 410 to cover the main surface 211, thereby improving the covering effect of the main covering area 410 on the main surface 211.

[0238] Optionally, as shown in FIG. 5 , FIG. 6 and FIG. 9 , the film clamp 332 is in transmission connection with a film clamping cylinder 336 , and the film clamping cylinder 336 can control the film clamp 332 to clamp or release the covering film 400 .

[0239] Optionally, as shown in Figures 5, 6, and 9, the first film transmission mechanism 333 includes a first film transmission motor 337. The two first film transmission motors 337 are used to drive the two film clamps 332 toward each other along the first direction D1. Specifically, the first film transmission mechanism 333 also includes a screw and a slider. The first film transmission motor 337 can drive the screw to rotate. The slider is mounted on the screw and screwed together with the screw via a thread. The slider and the film clamp 332 are fixed relative to each other, and the rotation axis of the screw is set parallel to the first direction D1. When the first film transmission motor 337 drives the screw to rotate, it can drive the slider to move along the rotation axis of the screw, thereby driving the film clamp 332 to move along the first direction D1.

[0240] Optionally, as shown in FIG5 , FIG6 and FIG9 , each film clamp 332 has two film clamps 338 , each film clamp 338 is used to clamp a corner of the covering film 400 , and the four film clamps 338 respectively clamp the four corners of the covering film 400 .

[0241] According to some embodiments of the present application, optionally, as shown in Figures 5, 6, and 9, the first film transmission mechanism 333 includes a first film transmission motor 337, a first film support 3371, and a second film support 342. The first film transmission motor 337 is disposed on the first film support 3371 and is configured to drive the second film support 342 to move relative to the first film support 3371 in a first direction D1. The film clamp 332 is disposed on the second film support 342 and includes a film clamping jaw 338 and a film clamping cylinder 336. The film clamping cylinder 336 is configured to drive the film clamping jaw 338 to clamp and fix the covering film 400.

[0242] Such a configuration is beneficial to the stable movement of the covering film 400 and can improve the accuracy of positioning the covering film 400.

[0243] According to some embodiments of the present application, optionally, as shown in Figures 5, 6 and 9, each first sub-coating assembly 331 further includes a second membrane transmission mechanism 334, and the two second membrane transmission mechanisms 334 respectively drive the corresponding membrane clamps 332 to rotate, so that the movement trend of the area of ​​the coating film 400 clamped by the membrane clamp 332 relative to the connecting area 420 is consistent with the bending trend of the unclamped area of ​​the main coating area 410 relative to the connecting area 420.

[0244] The unclamped area of ​​the main coating region 410 is bent relative to the connection region 420 to form a coating around the main surface 211. After the unclamped area of ​​the main coating region 410 covers the main surface 211, the film clamp 332 can release its clamping force on the coating film 400. The area of ​​the coating film 400 clamped by the film clamp 332 also needs to be coated on the electrode body 210. By arranging the movement trend of the area of ​​the coating film 400 clamped by the film clamp 332 relative to the connection region 420 to be consistent with the bending trend of the unclamped area of ​​the main coating region 410 relative to the connection region 420, the area of ​​the coating film 400 clamped by the film clamp 332 can be brought closer to the electrode body 210, facilitating the coating of the area of ​​the coating film 400 clamped by the film clamp 332 on the electrode body 210.

[0245] In addition, after the membrane clamp 332 releases the clamping of the coating film 400, by setting the movement trend of the area of ​​the coating film 400 clamped by the membrane clamp 332 relative to the connecting area 420 to be consistent with the bending trend of the unclamped area of ​​the main coating area 410 relative to the connecting area 420, the adverse effect of the area of ​​the coating film 400 clamped by the membrane clamp 332 on the main surface 211 of the unclamped area of ​​the main coating area 410 can be reduced, and the risk of the unclamped area of ​​the main coating area 410 falling off from the main surface 211 can be reduced.

[0246] Optionally, as shown in Figures 5, 6, and 9, the second membrane drive mechanism 334 includes a fourth membrane support 339 and a second membrane drive motor 340. The fourth membrane support 339 is provided with a membrane clamp 332, and the second membrane drive motor 340 is used to drive the fourth membrane support 339 to rotate. Furthermore, a membrane clamping cylinder 336 is fixed to the fourth membrane support 339.

[0247] According to some embodiments of the present application, optionally, as shown in Figures 5, 6, and 9, the first film transmission mechanism 333 includes a first film transmission motor 337, a first film support 3371, and a second film support 342. The first film transmission motor 337 is disposed on the first film support 3371 and is configured to drive the second film support 342 to move relative to the first film support 3371 along a first direction D1. The second film transmission mechanism 334 includes a second film transmission motor 340, which is disposed on the second film support 342 and drives the film clamp 332 to rotate. The film clamp 332 includes a film clamping jaw 338 and a film clamping cylinder 336. The film clamping cylinder 336 is configured to drive the film clamping jaw 338 to clamp and fix the covering film 400.

[0248] Such an arrangement can improve the movement freedom of the coating film 400 and enhance the coating effect.

[0249] According to some embodiments of the present application, optionally, as shown in Figures 5, 6, and 9, each first sub-encapsulation assembly 331 further includes a third film transmission mechanism 335. The two third film transmission mechanisms 335 respectively drive the corresponding film clamp 332 to move along the second direction D2 toward the side where the electrode body 210 is located.

[0250] When the film clamp 332 moves along the second direction D2 toward the side where the electrode body 210 is located, the electrode assembly 200 can remain fixed or move along the second direction D2 toward the coating film 400. In this configuration, by driving the film clamp 332 to move along the second direction D2 toward the side where the electrode body 210 is located, the first 212a of the two end surfaces 212 can be brought into contact with the connection area 420, and the main coating area 410 can be driven to move along the second direction D2 toward the side where the electrode body 210 is located, so that the projections of the two main coating areas 410 along the first direction D1 on the corresponding main surfaces 211 can gradually cover the exposed portions of the main surfaces 211, thereby facilitating the main coating areas 410 covering the main surfaces 211.

[0251] Optionally, as shown in Figures 5, 6 and 9, the first positioning assembly 310 includes an electrode clamp 311 and an electrode transmission mechanism 312, the electrode clamp 311 is configured to clamp and fix the electrode body 210, and the electrode transmission mechanism 312 is configured to drive the electrode assembly 200 to move along the second direction D2 toward the side where the coating film 400 is located, so that after the first 212a of the two end faces 212 contacts the connection area 420, the first 212a of the two end faces 212 and the connection area 420 continue to move synchronously along the second direction D2, and the third membrane transmission mechanism 335 drives the corresponding membrane clamp 332 along the second direction D2 after the first 212a of the two end faces 212 contacts the connection area 420, and moves along the second direction D2 toward the side away from the electrode body 210.

[0252] The direction in which the film clamp 332 moves along the second direction D2 can be the same as the direction in which the electrode assembly 200 moves along the second direction D2, so that the coating film 400 and the electrode assembly 200 can be moved synchronously to a new station. During the process of synchronously moving the coating film 400 and the electrode assembly 200 to the new station, the displacement stroke of the film clamp 332 moving along the second direction D2 toward the side away from the electrode body 210 is smaller than the displacement stroke of the electrode assembly 200 moving along the second direction D2 toward the side where the coating film 400 is located, so that the coating film 400 and the electrode assembly 200 are relatively displaced, thereby allowing the first 212a of the two end surfaces 212 to contact the connection area 420 and drive the main coating area 410 to move along the second direction D2 toward the side where the electrode body 210 is located, so that the projections of the two main coating areas 410 on the corresponding main surfaces 211 along the first direction D1 can gradually cover the exposed portions of the main surfaces 211, thereby facilitating the main coating areas 410 covering the main surfaces 211.

[0253] Optionally, as shown in Figures 5, 6, and 9, the third film transmission mechanism 335 is provided with a third film transmission motor 341, which is used to drive the film clamp 332 to move in the second direction D2. Specifically, the third film transmission mechanism 335 also includes a screw and a slider. The third film transmission motor 341 can drive the screw to rotate. The slider is mounted on the screw and screwed together with the screw via a thread. The slider is fixed relative to the film clamp 332, and the rotation axis of the screw is set parallel to the second direction D2. When the third film transmission motor 341 drives the screw to rotate, it can drive the slider to move along the rotation axis of the screw, thereby driving the film clamp 332 to move in the second direction D2.

[0254] Optionally, as shown in Figures 5, 6, and 9, the first sub-encapsulation assembly 331 is provided with a second membrane support 342 and a third membrane support 343. The second membrane support 342 extends along the second direction D2, and the third membrane support 343 is slidably disposed on the second membrane support 342 along the second direction D2. The second membrane transmission mechanism 334 and the membrane clamp 332 are disposed on the third membrane support 343. The third membrane transmission mechanism 335 is in transmission connection with the third membrane support 343. The third membrane transmission mechanism 335 can drive the third membrane support 343 to move in the second direction D2, thereby driving the second membrane transmission mechanism 334 and the membrane clamp 332 to move in the second direction D2 via the third membrane support 343. The third membrane transmission mechanism 335 is arranged on the second membrane support 342, and the first membrane transmission mechanism 333 is transmission-connected with the second membrane support 342. The first membrane transmission mechanism 333 can drive the second membrane support 342 to move along the first direction D1, thereby driving the third membrane transmission mechanism 335, the third membrane support 343, the second membrane transmission mechanism 334 and the membrane clamp 332 to move along the first direction D1 through the second membrane support 342.

[0255] According to some embodiments of the present application, optionally, as shown in Figures 5, 6, and 9, the first membrane transmission mechanism 333 includes a first membrane transmission motor 337, a first membrane support 3371, and a second membrane support 342. The first membrane transmission motor 337 is disposed on the first membrane support 3371 and is configured to drive the second membrane support 342 to move relative to the first membrane support 3371 along a first direction D1. The third membrane transmission mechanism 335 includes a third membrane transmission motor 341 and a third membrane support 343. The third membrane transmission motor 341 is disposed on the second membrane support 342 and drives the third membrane support 343 to move relative to the second membrane support 342 along a second direction D2. The second film transmission mechanism 334 includes a second film transmission motor 340, which is arranged on the third film support 343 and drives the film clamp 332 to rotate. The film clamp 332 includes a film clamping claw 338 and a film clamping cylinder 336. The film clamping cylinder 336 is configured to drive the film clamping claw 338 to clamp and fix the coating film 400.

[0256] Such an arrangement can further improve the movement freedom of the coating film 400 and enhance the coating effect.

[0257] According to some embodiments of the present application, optionally, as shown in Figures 5, 10 and 11, the coating device 300 also includes a second positioning component 350, which is configured to clamp and fix the coating film 400 and the electrode body 210 from the outside of the two main coating areas 410.

[0258] After the two main covering regions 410 cover the two main surfaces 211 of the electrode body 210, the second positioning assembly 350 can be used to clamp and secure the covering film 400 and the electrode body 210. The second positioning assembly 350 can prevent the main covering regions 410 from separating from the main surfaces 211 of the electrode body 210, thereby improving the stability of the main covering regions 410 covering the main surfaces 211 of the electrode body 210.

[0259] According to some embodiments of the present application, optionally, as shown in FIG. 5 , FIG. 10 and FIG. 11 , the second positioning assembly 350 is a carrying fixture that can be synchronously moved with the covering film 400 and the electrode body 210 .

[0260] By setting the second positioning component 350 as a supporting fixture that can move synchronously with the coating film 400 and the electrode body 210, the coating film 400 and the electrode body 210 can be easily transferred between different workstations, thereby improving the stability of the coating process of the main coating film 400 on the electrode body 210.

[0261] Optionally, the first positioning component 310 is a robot with a clamping function.

[0262] According to some embodiments of the present application, optionally, as shown in FIG. 5 , FIG. 10 and FIG. 11 , the first positioning assembly 310 is configured to insert the electrode body 210 and the covering film 400 into the second positioning assembly 350 along the second direction D2 .

[0263] The first positioning assembly 310 can move the electrode assembly 200 along the second direction D2 toward the side where the coating film 400 is located. After the electrode body 210 and the coating film 400 are inserted into the second positioning assembly 350, the second positioning assembly 350 can position the electrode assembly 200. Before and after the coating film 400 covers the main surface 211 of the electrode body 210, the first positioning assembly 310 and the second positioning assembly 350 can alternately position the electrode assembly 200. This can facilitate the movement of the electrode assembly 200 between different workstations and simplify the second positioning assembly 350's positioning of the electrode assembly 200, thereby improving coating efficiency.

[0264] Optionally, as shown in Figures 5, 10 and 11, the second positioning assembly 350 has two limit members 353 that can move away from or approach each other. When the electrode body 210 and the coating film 400 are inserted into the second positioning assembly 350, the two limit members 353 can move away from each other, thereby facilitating the insertion of the electrode body 210 and the coating film 400 into the second positioning assembly 350.

[0265] According to some embodiments of the present application, optionally, as shown in Figures 5, 10, and 11, each second positioning assembly 350 includes a fixed bracket 351, an opening and closing mechanism (not labeled), and two limiting members 353. The two limiting members 353 are movably disposed on the fixed bracket 351 along the first direction D1, and a limiting gap 354 is formed between the two. The limiting gap 354 is for the electrode body 210 and the coating film 400 to be inserted. The opening and closing mechanism is configured to drive the two limiting members 353 to move closer to or away from each other.

[0266] Such a configuration can facilitate the insertion of the electrode body 210 and the coating film 400 into the limiting gap 354 , while improving the clamping effect of the electrode body 210 and the coating film 400 .

[0267] According to some embodiments of the present application, optionally, as shown in Figures 5, 10, and 11, each opening and closing mechanism includes an elastic member 355 and an opening mechanism (not shown). The elastic member 355 is disposed between the two limiting members 353 and is configured to elastically drive the two limiting members 353 toward each other, while the opening mechanism is configured to drive the two limiting members 353 away from each other.

[0268] By providing the elastic member 355 , the second positioning assembly 350 can adaptively adjust the clamping force between the electrode body 210 and the coating film 400 .

[0269] Optionally, as shown in FIG. 5 , FIG. 10 and FIG. 11 , a hook plate 356 is provided on the limiting member 353 , and the opening mechanism drives the two limiting members 353 away from each other through the hook plate 356 .

[0270] According to some embodiments of the present application, optionally, as shown in Figures 5, 10, and 11, the opening and closing mechanism includes a rotating member 357, with both ends of the rotating member 357 respectively connected to the two limiting members 353. The middle area of ​​the rotating member 357 is configured to be rotatably connected to the fixed bracket 351. The rotating member 357 is further configured to drive the other limiting member 353 to move in the opposite direction when the first of the two limiting members 353 moves in the first direction D1.

[0271] The rotating member 357 can play a role in transmitting and reversing the motion between the two limiting members 353. By providing the rotating member 357, the two limiting members 353 can achieve synchronous motion and opposite motion directions.

[0272] According to some embodiments of the present application, optionally, as shown in Figures 12 to 15, the coating film 400 includes a side coating area 430 connected to the main coating area 410, and the coating device 300 also includes a second coating component 370, which is configured to contact the transmission side coating area 430 and coat the side surface 213.

[0273] 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.

[0274] According to some embodiments of the present application, optionally, as shown in Figures 12 to 15, 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.

[0275] 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 .

[0276] 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.

[0277] Alternatively, as shown in Figures 12 to 15, 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] According to some embodiments of the present application, optionally, as shown in Figures 12 to 15, 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.

[0282] 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.

[0283] According to some embodiments of the present application, optionally, as shown in Figures 12 to 15, 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.

[0284] 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 .

[0285] Optionally, as shown in Figures 12 to 15 , 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] Optionally, as shown in Figures 12 to 15, 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.

[0290] Optionally, as shown in Figures 12 to 15, 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.

[0291] Furthermore, the first pressing plate bracket 378 and the second pressing plate bracket 379 are relatively fixedly arranged.

[0292] Optionally, as shown in Figures 12 to 15 , the end pressure plate 374 is provided with an adjustable end stopper 3741. The end stopper 3741 is used to abut the primary 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, electrode assemblies 200 of different sizes can be accommodated, 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 primary cladding region 410, thereby improving the fit with the primary cladding region 410.

[0293] Optionally, as shown in Figures 12 to 15 , 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 region 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 used to accommodate 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 region 410, thereby improving the fit with the main coating region 410.

[0294] According to some embodiments of the present application, optionally, as shown in Figures 12 to 15 , 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.

[0295] 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.

[0296] According to some embodiments of the present application, optionally, as shown in Figures 6, 7, 16 and 17, 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 212 212. The coating device 300 also includes a first tape attaching component 380, and the first tape attaching component 380 is used to attach the first tape 510 to the electrode assembly 200. The first tape 510 includes a first part and a second part connected to each other. 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 of the two end surfaces 212 b.

[0297] The first tape attaching assembly 380 can drive the electrode assembly 200 and the first tape 510 to move relative to each other. The first tape 510 can connect the side coating region 430 and the end coating region 440 together, so that the side coating region 430 and the end coating region 440 can remain fixed relative to the electrode body 210, thereby improving the coating film 400's coating firmness on the electrode body 210.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] Optionally, as shown in Figures 18 to 23, 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.

[0302] Optionally, as shown in Figures 18 to 23, 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.

[0303] According to some embodiments of the present application, optionally, as shown in Figures 18 to 23, 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.

[0304] Such an arrangement is conducive to automatically providing the first adhesive tape 510 .

[0305] According to some embodiments of the present application, optionally, as shown in Figures 18 to 23, the first glue pulling mechanism 382 includes a first glue clamping cylinder 3821, a first glue pulling motor 3822 and a first glue clamping piece 3823, the first glue clamping cylinder 3821 is used to drive the first glue clamping piece 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 piece 3823 to move to pull the release part.

[0306] 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.

[0307] According to some embodiments of the present application, optionally, as shown in Figures 18 to 23, 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.

[0308] 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°.

[0309] According to some embodiments of the present application, optionally, as shown in Figures 18 to 23, 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.

[0310] 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.

[0311] According to some embodiments of the present application, as shown in Figures 18 to 23, 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 lateral to the main surface of 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.

[0312] 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 .

[0313] According to some embodiments of the present application, as shown in Figures 18 to 23 , 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.

[0314] Such an arrangement can improve the continuity of the glue taking action and the glue applying action.

[0315] 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.

[0316] According to some embodiments of the present application, as shown in Figures 18 to 23 , 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.

[0317] The telescopic member can expand and contract. For example, the telescopic member is an elastic part that expands and contracts under pressure.

[0318] 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.

[0319] According to some embodiments of the present application, optionally, as shown in Figures 18 to 23, the first cutting mechanism 383 is configured to cut two first adhesive tapes 510 from the release portion. 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 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. There are two first adhesive dispensing members 3861, each of which absorbs a corresponding 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 to the side of the main surface of 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.

[0320] 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.

[0321] 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.

[0322] According to some embodiments of the present application, optionally, as shown in Figures 6, 7, 16 and 17, the coating device 300 also includes a second tape attaching component 390, and the second tape attaching component 390 is used to attach the second tape on the electrode assembly, 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 213 and the main surface 211, and attach the second part 522 of the second tape 520 to the side coating area 430.

[0323] The second tape applying assembly 390 can drive relative movement between the electrode assembly 200 and the second tape 520. Prior to attaching the second 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 disconnected from the other of the two main coating regions 410. The second tape 520 connects the side coating region 430 to the other of the main coating regions 410, allowing the side coating region 430 and the main coating region 410 to remain fixed relative to the electrode body 210, thereby improving the securement of the coating film 400 on the electrode body 210.

[0324] 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.

[0325] Optionally, as shown in Figures 24 to 30, 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.

[0326] 24 to 30 , 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.

[0327] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, 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.

[0328] 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 .

[0329] 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 .

[0330] According to some embodiments of the present application, as shown in Figures 24 to 30, 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 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 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.

[0331] Such an arrangement is conducive to automatically providing the second adhesive tape 520 .

[0332] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, 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.

[0333] 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.

[0334] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, 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 the two groups of second unwinding mechanisms and second cutting mechanisms.

[0335] 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.

[0336] 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.

[0337] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, the second tape attaching 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.

[0338] 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.

[0339] According to some embodiments of the present application, as shown in Figures 24 to 30 , the second tape applying assembly 390 optionally includes a second adhesive dispensing mechanism 395, which is configured 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 configured 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 laterally to the main surface of the release portion, and moves the second adhesive dispensing member 3951 toward and away from the plane of the release portion of the second tape roll 396. Furthermore, the fourth adhesive dispensing motor 3952 drives the second adhesive dispensing member 3951 to move opposite the release portion of the second tape roll 396 along the thickness direction D6 of the release portion of the second tape roll 396.

[0340] 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 .

[0341] According to some embodiments of the present application, as shown in Figures 24 to 30 , 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.

[0342] Such an arrangement can improve the continuity of the glue taking action and the glue applying action.

[0343] 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.

[0344] According to some embodiments of the present application, as shown in Figures 24 to 30 , 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.

[0345] The telescopic member can be telescopic. For example, the telescopic member is an elastic part.

[0346] 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.

[0347] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, the second unwinding mechanism 391 and the second cutting mechanism 393 are provided in two corresponding groups and are spaced apart along the width direction D4 of the released portion of the second 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, so that the second adhesive dispensing member 3951 switches between the two groups of the second unwinding mechanisms 391 and the second cutting mechanism 393.

[0348] 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.

[0349] 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.

[0350] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, the second tape applying assembly 390 includes a third positioning assembly 360, and the third positioning 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.

[0351] 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.

[0352] According to some embodiments of the present application, as shown in Figures 24 to 30 , the third positioning 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.

[0353] 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.

[0354] According to some embodiments of the present application, optionally, as shown in Figures 24 to 30, the second tape applying assembly 390 includes two second unwinding mechanisms 391. The third positioning assembly 360 includes a shifting motor 367 and a shifting bracket 368. The main pressing cylinder 361, the main pressing member 362, the side pressing cylinder 363, the side pressing member 364, the rotating motor 365, and the rotating bracket 366 are disposed on the shifting bracket 368. The shifting motor 367 is configured to drive the shifting bracket 368 to move along the spacing direction D5 between the two second unwinding mechanisms 391.

[0355] 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.

[0356] 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.

[0357] According to some embodiments of the present application, optionally, as shown in Figures 4 and 31, 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.

[0358] 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.

[0359] Furthermore, the two electrode modules 220 can be connected in series or in parallel via the electrode ear portion 201 .

[0360] 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.

[0361] According to some embodiments of the present application, optionally, as shown in Figures 4 to 31, the electrode assembly 200 includes an electrode body 210, the electrode body 210 has 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, and the coating device 300 includes a first positioning component 310 and a first coating component 330. The first positioning component 310 is configured to position the electrode assembly 200 and to keep the two main surfaces 211 at least partially exposed. The first coating component 330 is configured to position the coating film 400, wherein the 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. At least one of the first positioning assembly 310 and the first covering assembly 330 is configured to drive relative movement between the electrode assembly 200 and the covering film 400 so that the connection region 420 contacts and covers the first one 212a of the two end surfaces 212, and the two main covering regions 410 respectively contact and cover the exposed portion of the corresponding one of the two main surfaces 211. The connection region 420 contacts the first one 212a of the two end surfaces 212 earlier than the two main covering regions 410 contact the corresponding one of the two main surfaces 211. The covering process of the two main covering regions 410 on the corresponding one of the two main surfaces 211 is at least partially synchronized. Before the first one 212a of the two end surfaces 212 contacts the connection region 420, the first covering assembly 330 is configured so that the connection region 420 and the two main covering regions 410 are coplanar with each other. The first coating component 330 is configured such that the connection region 420 is suspended, and the first one 212a of the two end surfaces 212 is configured to contact the suspended connection region 420. The electrode assembly 200 also includes a tab 201 protruding from the first one 212a of the two end surfaces 212. The connection region 420 is provided with an opening 421. The tab 201 is configured to pass through the opening 421 as the electrode assembly 200 and the coating film 400 move relative to each other. At least one of the first positioning component 310 and the first covering component 330 is configured to drive the electrode component 200 and the covering film 400 closer to each other along the second direction D2, and after the first 212a of the two end surfaces 212 contacts the connection area 420, the driving electrode component 200 continues to move along the second direction D2 relative to the end of the two main covering areas 410 away from the connection area 420. The first covering component 330 is also configured to drive the ends of the two main covering areas 410 closer to each other along the first direction D1, thereby making the two main covering areas 410 contact and cover the exposed portion of the corresponding one of the two main surfaces 211.The first positioning assembly 310 includes an electrode clamp 311, which is configured to clamp and fix the electrode body 210 from outside the two side surfaces 213 along the third direction D3, or to clamp and fix the electrode body 210 from outside the two main surfaces 211 along the first direction D1. The first positioning assembly 310 includes an electrode drive mechanism 312, which is configured to drive the electrode assembly 200 to move along the second direction D2 toward the side where the coating film 400 is located. After the first of the two end surfaces 212a contacts the connection area 420, the first of the two end surfaces 212a and the connection area 420 are driven to continue to move synchronously along the second direction D2. The electrode drive mechanism 312 includes an electrode drive motor 314, a first electrode bracket 3141, and a second electrode bracket 3142. The electrode drive motor 314 is mounted on the first electrode bracket 3141 and is configured to drive the second electrode bracket 3142 to move relative to the first electrode bracket 3141 along the second direction D2. The electrode clamp 311 is disposed on the second electrode bracket 3142 and includes an electrode clamp 3131 and an electrode clamping cylinder 313. The electrode clamping cylinder 313 is configured to drive the electrode clamp 3131 to clamp and fix the electrode body 210. The first coating assembly 330 includes two first sub-coating assemblies 331 spaced apart from each other. Each first sub-coating assembly 331 includes a membrane clamp 332 and a first membrane transmission mechanism 333. The two membrane clamps 332 respectively clamp and fix the ends of the coating film 400 away from the connection area 420. The first membrane transmission mechanism 333 drives the two membrane clamps 332 toward each other along the first direction D1, so that the area of ​​the main coating area 410 not clamped by the membrane clamp 332 can be bent relative to the connection area 420 toward the corresponding main surface 211. The first film transmission mechanism 333 includes a first film transmission motor 337, a first film support 3371, and a second film support 342. The first film transmission motor 337 is mounted on the first film support 3371 and is configured to drive the second film support 342 to move relative to the first film support 3371 in a first direction D1. The film clamp 332 is mounted on the second film support 342 and includes a film clamp 338 and a film clamping cylinder 336. The film clamping cylinder 336 is configured to drive the film clamp 338 to clamp and secure the coating film 400. Each first sub-coating assembly 331 also includes a second film transmission mechanism 334. The two second film transmission mechanisms 334 respectively drive the corresponding film clamp 332 to rotate, so that the movement trend of the area of ​​the coating film 400 clamped by the film clamp 332 relative to the connection area 420 is consistent with the bending trend of the unclamped area of ​​the main coating area 410 relative to the connection area 420.The first membrane transmission mechanism 333 includes a first membrane transmission motor 337, a first membrane support 3371, and a second membrane support 342. The first membrane transmission motor 337 is mounted on the first membrane support 3371 and is configured to drive the second membrane support 342 to move relative to the first membrane support 3371 in a first direction D1. The second membrane transmission mechanism 334 includes a second membrane transmission motor 340, which is mounted on the second membrane support 342 and drives the membrane clamp 332 to rotate. The membrane clamp 332 includes a membrane clamping jaw 338 and a membrane clamping cylinder 336. The membrane clamping cylinder 336 is configured to drive the membrane clamping jaw 338 to clamp and fix the coating film 400. Each first sub-coating assembly 331 also includes a third membrane transmission mechanism 335. The two third membrane transmission mechanisms 335 respectively drive the corresponding membrane clamp 332 to move in the second direction D2 toward the side where the electrode body 210 is located. Alternatively, the first positioning assembly 310 includes an electrode drive mechanism 312, which is configured to drive the electrode assembly 200 to move along the second direction D2 toward the side where the covering film 400 is located. After the first of the two end surfaces 212a contacts the connection area 420, the electrode drive mechanism 312 drives the first of the two end surfaces 212a and the connection area 420 to continue to move synchronously along the second direction D2. After the first of the two end surfaces 212a contacts the connection area 420, the third membrane drive mechanism 335 drives the corresponding membrane clamp 332 along the second direction D2 toward the side away from the electrode body 210. The first membrane drive mechanism 333 includes a first membrane drive motor 337, a first membrane support 3371, and a second membrane support 342. The first membrane drive motor 337 is disposed on the first membrane support 3371 and is configured to drive the second membrane support 342 to move relative to the first membrane support 3371 along the first direction D1. The third membrane drive mechanism 335 includes a third membrane drive motor 341 and a third membrane support 343. The third membrane drive motor 341 is mounted on the second membrane support 342 and drives the third membrane support 343 to move relative to the second membrane support 342 in the second direction D2. The second membrane drive mechanism 334 includes a second membrane drive motor 340, which is mounted on the third membrane support 343 and drives the membrane clamp 332 to rotate. The membrane clamp 332 includes a membrane clamping jaw 338 and a membrane clamping cylinder 336. The membrane clamping cylinder 336 is configured to drive the membrane clamping jaw 338 to clamp and secure the coating film 400. The coating apparatus 300 also includes a second positioning assembly 350, which is configured to clamp and secure the coating film 400 and the electrode body 210 from outside the two main coating regions 410. The second positioning assembly 350 is a supporting fixture that can move synchronously with the coating film 400 and the electrode body 210. The first positioning assembly 310 is configured to drive the electrode assembly 200 to move toward the side where the coating film 400 is located along the second direction D2 so that the electrode body 210 and the coating film 400 are inserted into the second positioning assembly 350 .Each second positioning assembly 350 includes a fixed bracket 351, an opening and closing mechanism and two limiting members 353. The two limiting members 353 are movably arranged on the fixed bracket 351 along the first direction D1, and a limiting gap 354 is formed between the two. The limiting gap 354 is for the electrode body 210 and the coating film 400 to be inserted. The opening and closing mechanism is configured to drive the two limiting members 353 to move closer to or away from each other. Each opening and closing mechanism includes an elastic member 355 and an opening mechanism. The elastic member 355 is arranged between the two limiting members 353 and is configured to elastically drive the two limiting members 353 to move closer to each other through its own elasticity. The opening mechanism is configured to drive the two limiting members 353 away from each other. The opening and closing mechanism includes a rotating member 357, and the two ends of the rotating member 357 are respectively connected to the two limiting members 353. The central region of the rotating member 357 is configured to be rotatably connected to the fixed bracket 351. The rotating member 357 is also configured to drive the other limiting member 353 to move in the opposite direction when the first of the two limiting members 353 moves in the first direction D1. The coating film 400 includes a side coating region 430 connected to the main coating region 410. The coating apparatus 300 also includes a second coating assembly 370, which is configured to drive the side coating region 430 to contact and coat the side surface 213. 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 drive the side pressure plate 371 in a first direction D1 so that the side pressure plate 371 pushes the side covering region 430 to bend relative to the main covering region 410 toward the side 213. The second pressure plate transmission mechanism 373 is used to drive the side pressure plate 371 in a third direction D3 so that the side pressure plate 371 presses the side covering region 430 against the side 213. The covering film 400 includes an end covering region 440 connected to the main covering region 410. The second covering assembly 370 is configured to drive the end covering region 440 to contact and cover the second of the two end surfaces 212b. The second covering assembly 370 includes an end plate 374, a first plate drive mechanism 372, and a third plate drive mechanism 375. The first plate drive mechanism 372 is configured to drive the end plate 374 in a first direction D1, such that the end plate 374 pushes the end covering region 440 to bend relative to the main covering region 410 toward the second one 212b of the two end surfaces 212. The third plate drive mechanism 375 is configured to drive the end plate 374 in a second direction D2, such that the end plate 374 presses the end covering region 440 against the second one 212b of the two end surfaces 212. The first plate drive mechanism 372 includes a plate drive motor 377, a first plate bracket 378, and a second plate bracket 379. The plate drive motor 377 is mounted on the first plate bracket 378 and drives the second plate bracket 379 to move relative to the first plate bracket 378.The second pressure plate transmission mechanism 373 includes a first pressure plate cylinder 376, which is mounted on a second pressure plate bracket 379 and drives the side pressure plate 371 to move relative to the second pressure plate bracket 379. The third pressure plate transmission mechanism 375 includes a second pressure plate cylinder 3761, which is mounted on the second pressure plate bracket 379 and drives the end pressure plate 374 to move relative to the second pressure plate 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 applying assembly 380 includes a first unwinding mechanism 381, a first adhesive 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 adhesive pulling mechanism 382 is configured to clamp and pull the leading end of the released portion of the first tape roll 384. The first cutting mechanism 383 is configured to cut the first tape 510 from the released portion of the first tape roll 384. The first adhesive pulling mechanism 382 includes a first adhesive clamping cylinder 3821, a first adhesive pulling motor 3822, and a first adhesive clamping member 3823. The first adhesive clamping cylinder 3821 is configured to drive the first adhesive clamping member 3823 to clamp the leading end of the released portion, and the first adhesive pulling motor 3822 is configured to drive the first adhesive clamping member 3823 to move and pull the released portion. The first unwinding mechanism 381 and the first cutting mechanism 383 form 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. Two sets of first unwinding mechanisms 381 and a first cutting mechanism 383 are disposed 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 first unwinding mechanisms 381 and first cutting mechanisms 383 to switch between a standby position and a working position for the first glue pulling mechanism 382 and first cutting mechanism 383 to operate. The rotation axis is perpendicular to the plane of the release portion. The first tape applying assembly 380 includes a first glue removal mechanism 386, which is used to absorb and remove the first 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 glue 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 glue dispensing mechanism 386, which is used to absorb and remove the first adhesive tape 510. The first glue dispensing mechanism 386 includes a first glue dispensing member 3861, a first glue dispensing motor 3862, a second glue dispensing motor 3863, a first glue dispensing bracket 3864, and a second glue dispensing bracket 3865. The first glue dispensing member 3861 is used to absorb the first adhesive tape 510. The first glue dispensing motor 3862 is disposed on the first glue dispensing bracket 3864 and drives the second glue dispensing bracket 3865 to move to the side of the main surface of 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 adhere 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 adhere 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. Two first adhesive dispensing components 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 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 glue dispensing motor 3862 is mounted on the first glue dispensing bracket 3864 and drives the second glue dispensing bracket 3865 to move laterally to the main surface of 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 also includes a second tape applying 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 applying assembly 390 is configured to apply 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 opposite ends of the second portion 522 of the second tape 520. The second tape applying assembly 390 is configured to apply 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 adhesive 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 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. 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 leading end of the released portion, and the second adhesive pulling motor 3922 is used 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 tape applying assembly 390 includes a tape applying bracket 394, a tape applying position-switch cylinder 3941, and a tape applying position-switch bracket 3942. The tape applying position-switch cylinder 3941 is mounted on the tape applying bracket 394, and the second tape applying mechanism 392 is mounted on the tape applying position-switch bracket 3942. The tape applying position-switch cylinder 3941 is configured to drive the tape applying position-switch bracket 3942 to move along the spacing direction D5 between the two second unwinding mechanisms 391, enabling the second tape applying mechanism 392 to switch between a standby position and a working position for the second tape applying mechanism 392 to operate. A second unwinding mechanism 391 and a second cutting mechanism 393 are each mounted on the standby position and the working position.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 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 component 3951, a fourth adhesive dispensing motor 3952, and a fourth adhesive dispensing bracket 3953. The second adhesive dispensing component 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 section 3954 and a fourth adhesive dispensing section 3955. The third adhesive dispensing section 3954 is used to absorb the first portion 521 of the second adhesive tape 520 and attach it to the main wrapping area 410. The fourth adhesive dispensing section 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 section 3955 is a telescopic member. The fourth glue dispensing motor 3952 drives the second glue dispensing member 3951 along the third direction D3. The fourth glue dispensing sub-unit 3955 presses the second portion 522 of the second adhesive tape 520 against the side wrapping area 430 and retracts, allowing the third glue 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. 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 glue dispensing mechanism 395 includes a glue dispensing shifting cylinder 3956 and a glue dispensing shifting bracket 3957. The glue dispensing 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 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, 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 second unwinding mechanism 391 and a second cutting mechanism 393 are each located in the standby position and the working position. The second tape applying assembly 390 includes a third positioning assembly 360, which comprises a main holding cylinder 361, a main holding member 362, a side holding cylinder 363, and a side holding member 364.The main holding cylinder 361 is configured to drive the main holding member 362 to hold the main covering area 410 and the main surface 211. The side holding cylinder 363 is configured to drive the side holding member 364 to hold the side covering area 430 and the side surface 213. The third positioning assembly 360 includes a rotary motor 365 and a rotary bracket 366. The main holding cylinder 361, the main holding member 362, the side holding cylinder 363, and the side holding member 364 are mounted 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. The second tape applying assembly 390 includes two second unwinding mechanisms 391. The third positioning assembly 360 includes a shift motor 367 and a shift bracket 368. The main holding cylinder 361, main holding member 362, side holding cylinder 363, side holding member 364, rotary motor 365, and rotary 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. The electrode body 210 includes two electrode modules 220 stacked one on another along a first direction D1. Each electrode module 220 includes a positive electrode sheet 221, a separator 222, and a negative electrode sheet 223 disposed in sequence.

[0362] Optionally, the coating equipment 300 also includes a coating film loading mechanism 301, an electrode assembly unloading mechanism 302, a jig conveyor line 303, a robot track 304, and a dust removal mechanism 305. The coating film loading mechanism 301 can suck the coating film 400 through negative pressure and then transfer the coating film 400 to the first coating assembly 330. After the film clamp 332 positions the coating film 400, the coating film loading mechanism 301 can leave the coating film 400. The jig conveyor line 303 can be used to transport the second positioning assembly 350, allowing the second positioning assembly 350 to reach different workstations, or allowing the second positioning assembly 350 to carry the electrode assembly 200 to different workstations. The electrode assembly unloading mechanism 302 can move the electrode assembly 200 to other processes after the coating film 400 coats the electrode assembly 200.

[0363] The robot track 304 can provide support for certain mechanisms requiring movement, allowing them to move along the robot track 304. For example, the coating film loading mechanism 301 and the electrode assembly unloading mechanism 302 can be slidably disposed on the robot track 304. The robot track 304 can be intersected with the jig conveyor line 303, allowing the second positioning assembly 350 to switch between moving along the robot track 304 and along the jig conveyor line 303. For example, at least two robot tracks 304 can be interwoven with at least two jig conveyor lines 303.

[0364] The jig conveyor line 303 can be interposed within the dust removal mechanism 305, allowing the dust removal mechanism 305 to remove dust from the second positioning assembly 350 that is moved within the dust removal mechanism 305. For example, the dust removal mechanism 305 can remove dust from the unloaded second positioning assembly 350 by blowing and exhausting air. Furthermore, different jig conveyor lines 303 can be interconnected, allowing the second positioning assembly 350 to circulate through different jig conveyor lines 303.

[0365] Optionally, the first tape attaching assembly 380 or the second tape attaching assembly 390 may be disposed on one side of the jig conveyor line 303 , so as to be able to adhere the first tape 510 or the second tape 520 to the electrode assembly 200 covered with the coating film 400 on the jig conveyor line 303 .

[0366] 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.

[0367] 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.

[0368] 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.

[0369] 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.

[0370] 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.

[0371] According to some embodiments of the present application, the electrode assembly described in the embodiment of the coating method of 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: S100: using a first positioning component to position the electrode assembly, and making the two main surfaces at least partially exposed. S200: using a first coating component to position the coating film, wherein the coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. S300: controlling at least one of the first positioning component and the first coating component to move relative to the other so that the connecting area contacts and coats the first of the two end surfaces, and the two main coating areas respectively contact and coat the corresponding one of the two main surfaces on the exposed portion from the first positioning component.

[0372] According to some embodiments of the present application, optionally, controlling at least one of the first positioning component and the first covering component to move relative to the other includes:

[0373] S310: Controlling the relative movement of the first positioning component and the first covering component so that the contact time between the connection area and the first one of the two end surfaces is earlier than the contact time between the two main covering areas and the corresponding one of the two main surfaces.

[0374] S320: Control the relative movement of the first positioning assembly and the first covering assembly so that the covering process of the two main covering areas on the corresponding one of the two main surfaces is at least partially synchronized.

[0375] According to some embodiments of the present application, optionally, controlling at least one of the first positioning component and the first covering component to move relative to the other includes:

[0376] S330: Control at least one of the first positioning assembly and the first covering assembly to move along the second direction so that the electrode assembly and the covering film approach each other along the second direction, and after the first of the two end surfaces contacts the connection area, the electrode assembly continues to move along the second direction relative to the end of the two main covering areas away from the connection area.

[0377] S340: Control the first covering component to move along the first direction so that the ends of the two main covering regions move closer to each other along the first direction, thereby making the two main covering regions contact and cover the exposed portion of a corresponding one of the two main surfaces.

[0378] According to some embodiments of the present application, optionally, the electrode assembly includes a pole ear portion, which is protrudingly provided on a first one of the two end surfaces, and an opening is provided on the connection area.

[0379] Positioning the covering film using the first covering component includes:

[0380] S210: Using a first positioning assembly to position the electrode assembly so that the electrode ear portion faces the connection area.

[0381] Controlling movement of at least one of the first positioning assembly and the first covering assembly relative to the other comprises:

[0382] S350: Control the relative movement of the first positioning assembly and the first covering assembly so that the tab portion passes through the opening along with the relative movement between the first positioning assembly and the first covering assembly, and the connection area contacts and covers the first of the two end surfaces.

[0383] 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.

[0384] In summary, the embodiments of the present application can adjust the relative position relationship between the electrode assembly and the coating film. When the coating film covers the two main surfaces and the first of the two end surfaces of the electrode body, it can improve the stability of the coating process and make the coating action simpler and smoother.

[0385] 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 first positioning assembly, configured to position the electrode assembly so that the two main surfaces are at least partially exposed; A first covering component, configured to position a covering film, wherein the covering film includes two main covering areas spaced apart from each other and a connecting area connected between the two main covering areas; At least one of the first positioning component and the first covering component is configured to be movable relative to the other so that the connection area contacts and covers the first of the two end surfaces, and the two main covering areas respectively contact and cover the exposed portion of the corresponding one of the two main surfaces.

2. The coating device according to claim 1, characterized in that: The relative movement between the first positioning component and the first covering component is configured so that the contact time between the connection area and the first one of the two end surfaces is earlier than the contact time between the two main covering areas and the corresponding one of the two main surfaces.

3. The coating device according to claim 2, characterized in that: The relative movement between the first positioning assembly and the first covering assembly is configured to at least partially synchronize the covering process of the two main covering areas on the corresponding one of the two main surfaces.

4. The coating device according to claim 3, characterized in that: Before the first of the two end surfaces contacts the connection area, the first covering component is arranged so that the connection area and the two main covering areas are coplanar with each other.

5. The coating device according to claim 4, characterized in that: The first covering component is configured to make the connection area in a suspended state, and the relative movement between the first positioning component and the first covering component is configured to make the first of the two end surfaces contact the connection area in the suspended state.

6. 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 pole ear portion is configured to pass through the opening along with the relative movement between the first positioning assembly and the first covering assembly.

7. The coating device according to any one of claims 1 to 6, characterized in that: At least one of the first positioning component and the first covering component is configured to move along the second direction so that the electrode assembly and the covering film approach each other along the second direction, and after the first of the two end surfaces contacts the connecting area, the electrode assembly continues to move along the second direction relative to the end of the two main covering areas away from the connecting area, and the first covering component is further configured to move along the first direction so that the ends of the two main covering areas approach each other along the first direction, thereby making the two main covering areas contact and cover the exposed portion of the corresponding one of the two main surfaces.

8. The coating device according to any one of claims 1 to 6, characterized in that: The first positioning assembly includes an electrode clamp, which is configured to clamp and fix the electrode body from outside the two side surfaces along the third direction, or to clamp and fix the electrode body from outside the two main surfaces along the first direction.

9. The coating device according to claim 8, characterized in that: The first positioning assembly includes an electrode transmission mechanism, which is configured to drive the electrode fixture to move along the second direction toward the side where the coating film is located, so that after the first of the two end surfaces contacts the connecting area, the first of the two end surfaces and the connecting area continue to move synchronously along the second direction.

10. The coating device according to claim 9, characterized in that: The electrode transmission mechanism includes an electrode transmission motor, a first electrode bracket and a second electrode bracket, wherein the electrode transmission motor is arranged on the first electrode bracket, and the electrode transmission motor is configured to drive the second electrode bracket to move relative to the first electrode bracket along the second direction; the electrode clamp is arranged on the second electrode bracket, and includes an electrode clamp and an electrode clamping cylinder, and the electrode clamping cylinder is configured to drive the electrode clamp to clamp and fix the electrode body.

11. The coating device according to any one of claims 1 to 6, characterized in that: The first covering component includes two first sub-covering components spaced apart from each other, each of the first sub-covering components includes a membrane clamp and a first membrane transmission mechanism, the two membrane clamps respectively clamp and fix the two ends of the covering film away from the connecting area, and the first membrane transmission mechanism drives the two membrane clamps closer to each other along the first direction, so that the area of ​​the main covering area not clamped by the membrane clamp can be bent relative to the connecting area toward the corresponding main surface.

12. The coating device according to claim 11, characterized in that: The first film transmission mechanism comprises a first film transmission motor, a first film support and a second film support, wherein the first film transmission motor is arranged on the first film support, and the first film transmission motor is arranged to drive the second film support to move relative to the first film support along the first direction; The film clamp is arranged on the second film support and comprises a film clamping claw and a film clamping cylinder. The film clamping cylinder is arranged to drive the film clamping claw to clamp and fix the coating film.

13. The coating device according to claim 11, characterized in that: Each of the first sub-wrapping components also includes a second membrane transmission mechanism, and the two second membrane transmission mechanisms respectively drive the corresponding membrane clamps to rotate, so that the movement trend of the area of ​​the covering film clamped by the membrane clamp relative to the connecting area is consistent with the bending trend of the unclamped area of ​​the main covering area relative to the connecting area.

14. The coating device according to claim 13, characterized in that: The first film transmission mechanism comprises a first film transmission motor, a first film support and a second film support, wherein the first film transmission motor is arranged on the first film support, and the first film transmission motor is arranged to drive the second film support to move relative to the first film support along the first direction; The second film transmission mechanism includes a second film transmission motor, which is arranged on the second film support and drives the film clamp to rotate. The film clamp includes a film clamping claw and a film clamping cylinder, and the film clamping cylinder is configured to drive the film clamping claw to clamp and fix the coating film.

15. The coating device according to claim 13, characterized in that: Each of the first sub-covering components further comprises a third film transmission mechanism, and the two third film transmission mechanisms respectively drive the corresponding film clamp to move along the second direction toward the side where the electrode body is located; Alternatively, the first positioning assembly includes an electrode clamp and an electrode transmission mechanism, the electrode clamp is configured to clamp and fix the electrode body, the electrode transmission mechanism is configured to drive the electrode clamp to move along the second direction toward the side where the coating film is located, so that after the first of the two end faces contacts the connecting area, the first of the two end faces and the connecting area continue to move synchronously along the second direction, and the third membrane transmission mechanism drives the corresponding membrane clamp along the second direction toward the side away from the electrode body after the first of the two end faces contacts the connecting area.

16. The coating device according to claim 15, characterized in that: The first film transmission mechanism comprises a first film transmission motor, a first film support and a second film support, wherein the first film transmission motor is arranged on the first film support, and the first film transmission motor is arranged to drive the second film support to move relative to the first film support along the first direction; The third film transmission mechanism comprises a third film transmission motor and a third film support, wherein the third film transmission motor is arranged on the second film support and drives the third film support to move relative to the second film support along the second direction; The second film transmission mechanism includes a second film transmission motor, which is arranged on the third film support and drives the film clamp to rotate. The film clamp includes a film clamping claw and a film clamping cylinder, and the film clamping cylinder is configured to drive the film clamping claw to clamp and fix the coating film.

17. The coating device according to any one of claims 1 to 6, characterized in that: The coating device further comprises a second positioning component, which is configured to clamp and fix the coating film and the electrode body from outsides of the two main coating areas.

18. The coating device according to claim 17, characterized in that: The second positioning component is a carrying fixture that can be synchronously moved with the covering film and the electrode body.

19. The coating device according to claim 17, characterized in that: The first positioning assembly is configured to insert the electrode body and the covering film into the second positioning assembly along the second direction.

20. The coating device according to claim 19, characterized in that Each of the second positioning components includes a fixed bracket, an opening and closing mechanism and two limit members. The two limit members are movably arranged on the fixed bracket along the first direction, and a limit gap is formed between the two. The limit gap is for the electrode body and the coating film to be inserted; the opening and closing mechanism is configured to drive the two limit members to move closer to or away from each other.

21. The coating device according to claim 20, characterized in that Each of the opening and closing mechanisms comprises an elastic member and an opening mechanism; the elastic member is arranged between the two limiting members and is arranged to elastically drive the two limiting members to move closer to each other, and the opening mechanism is arranged to drive the two limiting members to move away from each other.

22. The coating device according to claim 20, characterized in that The opening and closing mechanism includes a rotating member, both ends of which are respectively connected to the two limiting members; the middle area of ​​the rotating member is configured to be rotatably connected to the fixed bracket, and the rotating member is also configured to drive the other limiting member to move in the opposite direction when the first of the two limiting members moves along the first direction.

23. The coating device according to any one of claims 1 to 6, characterized in that: The covering film includes a side covering area connected to the main covering area, and the covering device also includes a second covering component, which is configured to drive the side covering area to contact and cover the side surface.

24. The coating device according to claim 23, 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.

25. The coating device according to claim 24, 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.

26. The coating device according to claim 25, 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.

27. The coating device according to claim 26, characterized in that The first pressing plate transmission mechanism comprises a pressing plate transmission motor, a first pressing plate bracket, and a second pressing plate bracket. The pressing plate transmission motor is arranged on the first pressing plate bracket and drives the second pressing plate bracket to move relative to the first pressing plate bracket. The second pressing plate transmission mechanism includes a first pressing plate cylinder, which is arranged on the second pressing plate bracket, and the first pressing plate cylinder drives the side The surface pressure plate moves relative to the second pressure plate bracket; The third pressing plate transmission mechanism comprises a second pressing plate cylinder, which is disposed on the second pressing plate bracket, and the second pressing plate cylinder drives the end surface pressing plate to move relative to the second pressing plate bracket.

28. The coating device according to any one of claims 1 to 6, 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 attach a first tape to the electrode assembly, and 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.

29. The coating device according to claim 28, 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.

30. The coating device according to claim 29, characterized in that The first glue pulling mechanism includes a first glue clamping cylinder, a first glue pulling motor and a first glue clamping piece. The first glue clamping cylinder is used to drive the first glue clamping piece to clamp the head end of the release part, and the first glue pulling motor is used to drive the first glue clamping piece to move to pull the release part.

31. The coating device according to claim 29, 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.

32. The coating device according to claim 29, 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.

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

34. The coating device according to claim 33, 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.

35. The coating device according to claim 34, 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.

36. The coating device according to claim 29, characterized in that The first cutting mechanism is configured to cut out two first adhesive tapes from the release part; the first adhesive tape attaching assembly includes a first glue taking mechanism, the first glue taking mechanism is used to absorb and take away the first adhesive tape, and the first glue taking mechanism includes a first glue taking piece, a first glue taking motor, a second glue taking motor, a first glue taking bracket, a second glue taking bracket, a third glue taking bracket and a glue dispensing cylinder; the number of the first glue taking pieces is two, and they respectively absorb the corresponding first adhesive tapes; the first glue taking motor is arranged on the first glue taking bracket, and drives the second glue taking bracket to move to the side of the main surface of the release part; the second glue taking motor is arranged on the second glue taking bracket, and drives the third glue taking bracket and the two first glue taking pieces to approach and move away from the plane where the release part is located; the glue dispensing cylinder is arranged on the third glue taking bracket, and the glue dispensing cylinder is configured to drive the two first glue taking pieces to move away from each other, so that the two first glue taking pieces correspond to the two corners of the electrode assembly spaced apart along the third direction respectively.

37. The coating device according to claim 28, characterized in that The coating device also includes a second tape attaching component, which is used to attach a second tape to the electrode assembly, the second tape including a first part and a second part connected to each other, and the second tape attaching component 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.

38. The coating device according to claim 37, 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.

39. The coating device according to claim 37 or 38, 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.

40. The coating device according to claim 39, 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.

41. 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 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 interval direction of the two second unwinding mechanisms, so that the second glue pulling mechanism can switch between the two groups of the second unwinding mechanism and the second cutting mechanism.

42. The coating device according to claim 39, 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.

43. The coating device according to claim 39, 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 the side of the main surface 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.

44. The coating device according to claim 43, characterized in that The glue taking part includes a third sub-glue taking part and a fourth sub-glue taking part; the third sub-glue taking part 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 part is used to absorb the second part of the second adhesive tape and attach it to the side covering area.

45. The coating device according to claim 44, 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.

46. ​​The coating device according to claim 43, 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 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 interval direction of the two second unwinding mechanisms, so that the second glue taking member can be switched between the two groups of the second unwinding mechanism and the second cutting mechanism.

47. The coating device according to claim 37 or 38, characterized in that The second tape attaching assembly includes a third positioning assembly, and the third positioning assembly includes a main pressing cylinder, a main pressing member, a side pressing cylinder and a side pressing member; the main pressing cylinder is configured to drive the main pressing member to press the main covering area and the main surface, and the side pressing cylinder is configured to drive the side pressing member to press the side covering area and the side surface.

48. The coating device according to claim 47, characterized in that The third positioning assembly includes a rotating motor and a rotating bracket; the main pressing cylinder, the main pressing member, the side pressing cylinder and the side pressing member are arranged on the rotating bracket, and the rotating motor is arranged to drive the rotating bracket to rotate; the axis of rotation of the rotating bracket is parallel to the second direction.

49. The coating device according to claim 48, characterized in that The second tape attaching assembly includes two second unwinding mechanisms; the third positioning assembly includes a shift motor and a shift bracket, and the main pressing cylinder, the main pressing member, the side pressing cylinder, the side pressing member, the rotating motor and the rotating bracket are arranged on the shift bracket; the shift motor is configured to drive the shift bracket to move along the spacing direction of the two second unwinding mechanisms.

50. The coating device according to any one of claims 1 to 6, characterized in that: The electrode body includes two electrode modules stacked on each other along the first direction, and each of the electrode modules includes a positive electrode sheet, a separator and a negative electrode sheet arranged in sequence.

51. 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: Positioning the electrode assembly using a first positioning assembly so that the two main surfaces are at least partially exposed; Positioning the covering film using a first covering component, wherein the covering film includes two main covering areas spaced apart from each other and a connecting area connected between the two main covering areas; Control at least one of the first positioning component and the first covering component to move relative to the other so that the connecting area contacts and covers the first of the two end surfaces, and the two main covering areas respectively contact and cover the corresponding one of the two main surfaces exposed from the first positioning component.

52. The coating method according to claim 51, characterized in that: The controlling at least one of the first positioning component and the first covering component to move relative to the other comprises: Controlling the relative movement of the first positioning component and the first covering component so that the contact time between the connection area and the first of the two end surfaces is earlier than the contact time between the two main covering areas and the corresponding one of the two main surfaces, and / or, The first positioning assembly and the first covering assembly are controlled to move relative to each other so that the covering process of the two main covering areas on the corresponding one of the two main surfaces is at least partially synchronized.

53. The coating method according to claim 51, characterized in that The controlling at least one of the first positioning component and the first covering component to move relative to the other comprises: Controlling at least one of the first positioning assembly and the first covering assembly to move along the second direction, so that the electrode assembly and the covering film are close to each other along the second direction, and after the first of the two end surfaces contacts the connection area, the electrode assembly continues to move along the second direction relative to the ends of the two main covering areas away from the connection area; The first covering component is controlled to move along the first direction so that the ends of the two main covering regions are brought closer to each other along the first direction, thereby making the two main covering regions contact and cover the exposed portion of a corresponding one of the two main surfaces.

54. The coating method according to claim 51, 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 positioning of the covering film by using the first covering component comprises: Positioning the electrode assembly using a first positioning assembly so that the electrode ear portion is disposed toward the connection area; The controlling at least one of the first positioning component and the first covering component to move relative to the other comprises: The first positioning component and the first covering component are controlled to move relative to each other so that the pole ear portion passes through the opening along with the relative movement between the first positioning component and the first covering component, and the connection area contacts and covers the first one of the two end surfaces.

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