Battery cell film coating device

Abstract

The utility model provides a battery cell coating device which comprises a circulating jig moving along a preset path and a manipulator arranged on one side of the preset path, the manipulator comprises a mechanical arm, a mounting seat driven by the mechanical arm, a clamping part and a positioning part, the clamping part and the positioning part are arranged on the mounting seat, the positioning part is provided with a plurality of positioning pieces which are elastically arranged on the mounting seat in a telescopic mode, and the positioning pieces are used for elastically abutting against the Mylar film placed on the circulating jig; and the clamping part is used for clamping the pole group and placing the pole group on the fixed Mylar film. According to the battery cell film coating device disclosed by the utility model, the Mylar film can be prevented from being dragged and deviated when a pole group is positioned, and the hot melting problem caused by deviation of the Mylar film subsequently is reduced, so that the production yield of the battery cell is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery core coating device. Background Art

[0002] At present, a Mylar film and electrode group combination station is designed in the common electrode group assembly stage to carry out the electrode group coating process. The coating process steps are: first load the Mylar film onto the circulation fixture, then lower the electrode group onto the Mylar film through the robot, and after positioning the electrode group through the positioning block, the Mylar film is coated on the electrode group.

[0003] During the production process, the positioning effect on the combined station is achieved by pushing the electrode group placed on the Mylar film through the positioning block. At the same time, the circulation fixture is usually equipped with a negative pressure suction hole to negatively adsorb the Mylar film to prevent the Mylar film from shifting during the coating process. In most cases, the Mylar film will not shift when the negative pressure suction hole is used for positioning, but occasionally the friction between the electrode group and the Mylar film when it is positioned will be greater than the force of the negative pressure to adsorb the Mylar film, causing the Mylar film to be dragged and shifted as the electrode group is positioned.

[0004] This deviation will cause abnormal problems in the following processes, such as failure to pull the Mylar film when folding the Mylar film and hot melting, hot melting point deviation, and no Mylar film at the hot melting point of the end plate, causing the pole assembly to become a reworked defective product or scrapped. Moreover, in the case of Mylar film deviation, blindly increasing the pressure of the negative pressure suction hole will also cause problems such as blockage of the negative pressure suction hole and unstable pressure breakage of the negative pressure suction hole, and this situation cannot be eliminated.

[0005] For this reason, the existing battery cell coating device still has the problem that the friction between the electrode group and the Mylar film when positioning is greater than the force of negative pressure adsorbing the Mylar film, which causes the Mylar film to be dragged and offset as the electrode group is positioned, which is not conducive to improving the yield of battery cell products. Utility Model Content

[0006] In view of this, the utility model aims to provide a battery cell coating device to reduce the generation rate of defective battery cells.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A cell coating device comprises a circulation jig moving along a preset path, and a manipulator arranged on one side of the preset path;

[0009] The manipulator includes a manipulator arm, a mounting seat driven by the manipulator arm, and a clamping portion and a positioning portion arranged on the mounting seat, the positioning portion has a plurality of positioning members elastically and telescopically arranged on the mounting seat, each of the positioning members is used to elastically press the Mylar film adsorbed on the circulation jig by negative pressure, and the clamping portion is used to clamp the electrode group and place the electrode group on the fixed Mylar film.

[0010] Furthermore, the mounting seat is provided with a connecting piece extending along its own width direction, and the two extending sections of the connecting piece extending out of the mounting seat are both provided with the positioning piece.

[0011] Furthermore, the connecting members are multiple and arranged at intervals along the length direction of the mounting seat.

[0012] Furthermore, the connecting member is located on one side of the thickness direction of the mounting seat, and the extending section includes a bent portion bent and extended from both ends of the connecting member to the other side of the thickness direction of the mounting seat, and a connecting portion connected to the extending end of the bent portion; each of the connecting portions is arranged parallel to the main section of the connecting member, and the positioning members on each of the extending sections are respectively arranged on the corresponding connecting portions.

[0013] Furthermore, each of the positioning members is slidably disposed on the corresponding connecting portion along the thickness direction of the mounting seat, and an elastic member is disposed between each of the positioning members and the corresponding connecting portion.

[0014] Furthermore, each of the connecting parts is provided with a sleeve, the positioning members in each of the connecting parts are slidably disposed in the corresponding sleeve, and the elastic member is disposed between the positioning member and the sleeve.

[0015] Furthermore, the positioning member has a positioning end for pressing and positioning the Mylar film; the elastic member includes a spring sleeved on the positioning member, and one end of the spring abuts against the positioning end, and the other end of the spring abuts against the sleeve.

[0016] Furthermore, the connecting portion is provided with an elongated hole extending along the length direction thereof; the sleeve is inserted into the elongated hole, and nuts for fixing the sleeve are respectively screwed on the upper and lower sides of the connecting portion.

[0017] Furthermore, it also includes positioning components arranged on both sides of the circulation fixture, and each of the positioning components is used to position the pole group.

[0018] Furthermore, the clamping portion includes a first clamping unit and a second clamping unit; the first clamping unit can cooperate with the second clamping unit to clamp and fix the pole group in two vertical directions.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The battery cell coating device described in the utility model is provided with a plurality of positioning members to elastically press the Mylar film to restrict and fix the Mylar film. The negative pressure adsorption effect of the circulation fixture on the Mylar film can be combined to keep the Mylar film from being dragged and deviated when the electrode group is positioned, thereby reducing the subsequent hot melting problem caused by the deviation of the Mylar film, thereby helping to reduce the generation rate of defective battery cells.

[0021] In addition, the matching arrangement of the connector and the extension section facilitates the installation and arrangement of the positioning member. There are multiple connectors, which can provide multiple installation points for installing the positioning member, which is conducive to improving the fixing effect of the Mylar film. The matching arrangement of the bending part and the connecting part, and the arrangement of each connecting part in parallel with the main section of the connector, are conducive to improving the rationality of the structural arrangement, so that each positioning member can more easily elastically press against the Mylar film.

[0022] In addition, the setting of the elastic member is conducive to the elastic expansion and contraction of the positioning member. By setting the sleeve, the positioning member can be guided to slide, and the reliability of the elastic expansion and contraction of the positioning member can be improved. The elastic member adopts a spring sleeved on the positioning member, which is not only mature in product, low in maintenance and replacement costs, but also has good structural stability. The use of the long hole and the nut is conducive to the fine adjustment of the position of each positioning member, and then it is conducive to achieving a better compression and fixing effect on the Mylar film. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the battery core coating device according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the positioning part according to an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the positioning member according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the mounting base according to an embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the positioning assembly according to an embodiment of the utility model;

[0029] Figure 6 This is a schematic structural diagram of the first clamping unit according to an embodiment of the utility model;

[0030] Figure 7 This is a schematic structural diagram of the second clamping unit according to an embodiment of the utility model;

[0031] Description of reference numerals:

[0032] 1. Circulation fixture;

[0033] 2. Mounting seat; 21. Support column; 22. Connecting plate;

[0034] 3. Clamping portion; 31. First clamping unit; 32. Second clamping unit;

[0035] 4. Positioning part; 41. Positioning member; 411. Positioning end; 412. Limiting end; 42. Connecting member; 421. Main section; 422. Extending section; 4221. Bending section; 4222. Connecting section; 43. Elastic member; 44. Sleeve; 45. Nut;

[0036] 5. Positioning assembly; 51. Long strip; 52. Positioning block;

[0037] 6. Electrode group; 7. Mylar film. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] The present embodiment relates to a battery cell coating device, which provides a plurality of positioning members 41 to elastically press the Mylar film 7 to restrict and fix the Mylar film 7. The Mylar film 7 can be combined with the negative pressure adsorption effect of the circulation fixture 1 on the Mylar film 7 to prevent the Mylar film 7 from being dragged and deviated when the electrode group 6 is positioned, thereby reducing the subsequent hot melting problem caused by the deviation of the Mylar film 7, thereby helping to reduce the generation rate of defective battery cells.

[0043] In terms of overall structure, Figures 1 to 7 As shown, the battery cell coating device of this embodiment includes a circulation fixture 1 that moves along a preset path, and a robot arm arranged on one side of the preset path.

[0044] The manipulator includes a robotic arm, a mounting base 2 driven by the robotic arm, and a clamping portion 3 and a positioning portion 4 arranged on the mounting base 2. The positioning portion 4 has a plurality of positioning members 41 elastically and telescopically arranged on the mounting base 2. Each positioning member 41 is used to elastically press the Mylar film 7 adsorbed on the circulation fixture 1 by negative pressure, and the clamping portion 3 is used to clamp the pole group 6 and place the pole group 6 on the fixed Mylar film 7.

[0045] It is worth noting that the preset path described in this embodiment can be set according to the battery cell transportation requirements, which can be a linear transportation path or a circular or arc-shaped transportation path. When a linear transportation path is adopted, this embodiment can use a linear drive module to drive the circulation fixture 1 to move. When a circular or arc-shaped transportation path is adopted, a turntable can be used to drive the circulation fixture 1 to move.

[0046] Furthermore, the related structural parts not mentioned in the circulation jig 1 of the present embodiment may refer to the jig products used for electrode group 6 coating in the prior art. For example, the circulation jig 1 is provided with a plurality of adsorption holes for negative pressure adsorption of Mylar film 7, etc. Meanwhile, the related structural parts not mentioned in the manipulator of the present embodiment may refer to the manipulator used for transporting electrode group 6 known to those skilled in the art, and the manipulator may be replaced by a driving mechanism when necessary, as long as it can complete the corresponding electrode group 6 or battery cell transport function.

[0047] Based on the above overall introduction, specifically, in this embodiment, as a preferred implementation form, Figure 1 and Figure 2 As shown, the mounting seat 2 is provided with a connecting member 42 extending along its own width direction, and the two extending sections 422 of the connecting member 42 extending out of the mounting seat 2 are both provided with positioning members 41. The matching arrangement of the connecting member 42 and the extending section 422 facilitates the installation and arrangement of the positioning member 41.

[0048] Here, it is still necessary to mention that the directional words such as "up, down, left, right, front, and back" used in the embodiment are defined based on the up-down direction (also called the height direction, or the thickness direction), the left-right direction (also called the width direction), and the front-back direction (also called the length direction) of the mounting seat 2 in the state of placing the electrode group 6. It can be understood that the up-down direction, the left-right direction, and the front-back direction of the mounting seat 2 in the state of placing the electrode group 6 are the same as the up-down direction, the left-right direction, and the front-back direction of the circulation fixture 1.

[0049] Considering the restriction and fixing effect of the Mylar film 7, in this embodiment, as a preferred implementation form, the connecting members 42 are arranged in a plurality at intervals along the length direction of the mounting seat 2. Thus, multiple mounting points can be provided to install the positioning member 41, which is conducive to improving the fixing effect of the Mylar film 7.

[0050] In specific implementation, the above-mentioned connecting members 42 can be set to two spaced apart along the length direction of the mounting seat 2, so that a four-point fixing form can be formed, which can reduce the use of parts and save costs while ensuring the reliability of fixing the Mylar film 7.

[0051] Secondly, in this embodiment, as a preferred implementation form, continue to combine Figure 1 and Figure 2 As shown, the connecting member 42 is located on one side of the mounting base 2 in the thickness direction, and the extending section 422 includes a bent portion 4221 bent and extended from both ends of the connecting member 42 to the other side of the mounting base 2 in the thickness direction, and a connecting portion 4222 connected to the extended end of the bent portion 4221.

[0052] Each connecting portion 4222 is arranged in parallel with the main section 421 of the connecting member 42 , and the positioning member 41 on each extending section 422 is respectively disposed on the corresponding connecting portion 4222 .

[0053] With such arrangement, the rationality of the structural arrangement can be improved by the coordinated arrangement of the bending portion 4221 and the connecting portion 4222 , as well as the arrangement of each connecting portion 4222 in parallel with the main section 421 of the connecting member 42 , so that each positioning member 41 can more easily elastically press against the Mylar film 7 .

[0054] In addition, in this embodiment, as a preferred implementation form, see Figure 2 As shown, each positioning member 41 is slidably arranged on the corresponding connecting portion 4222 along the thickness direction of the mounting seat 2, and an elastic member 43 is arranged between each positioning member 41 and the corresponding connecting portion 4222. The arrangement of the elastic member 43 is conducive to realizing the elastic expansion and contraction of the positioning member 41.

[0055] To elaborate, in this embodiment, as a preferred implementation form, a sleeve 44 is provided on each connecting part 4222 , the positioning members 41 in each connecting part 4222 are slidably disposed in the corresponding sleeve 44 , and the elastic member 43 is disposed between the positioning member 41 and the sleeve 44 .

[0056] It is understandable that by providing the sleeve 44, the positioning member 41 can be guided to slide and the reliability of the elastic expansion of the positioning member 41 can be improved. In the specific structure, the sleeve 44 is extended along the thickness direction of the mounting seat 2, and the end of the elastic member 43 connected to the positioning member 41 is located below the sleeve 44.

[0057] Furthermore, in this embodiment, as a preferred implementation form, Figure 2 and Figure 3 As shown, the positioning member 41 has a positioning end 411 for pressing and positioning the Mylar film 7. The elastic member 43 includes a spring sleeved on the positioning member 41, with one end of the spring abutting against the positioning end 411, and the other end of the spring abutting against the sleeve 44.

[0058] By using the elastic member 43 as a spring sleeved on the positioning member 41, not only the product is mature, the maintenance and replacement costs are low, but also the structural stability is good.

[0059] Of course, when necessary, the cross-sectional area of ​​the positioning end 411 is larger than the cross-sectional area of ​​the positioning member 41, so as to facilitate the formation of a limit for the positioning member 41 and facilitate the spring abutment. At the same time, the end of the positioning member 41 away from the positioning end 411 can be set as a limiting end 412, and the cross-sectional area of ​​the limiting end 412 is also larger than the cross-sectional area of ​​the positioning member 41, so as to cooperate with the positioning end 411 to prevent the positioning member 41 from separating from the sleeve 44.

[0060] Furthermore, in this embodiment, as a preferred implementation form, a long hole extending along the length direction of the connecting portion 4222 is provided. The sleeve 44 is inserted into the long hole, and the upper and lower sides of the sleeve 44 are respectively screwed with nuts 45 for fixing the sleeve 44.

[0061] The advantage of this arrangement is that the long hole can be used to achieve fine adjustment of the position of the positioning member 41, thereby facilitating a better compression and fixing effect on the Mylar film 7. At the same time, the setting of the nut 45 facilitates the locking and contact locking of the sleeve 44 on the connecting portion 4222, which is easy to operate and low-cost.

[0062] In addition, in this embodiment, as a preferred implementation form, Figure 1 As shown, the cell coating device of this embodiment further includes positioning components 5 disposed on both sides of the circulation fixture 1 , and each positioning component 5 is used to position the electrode group 6 .

[0063] In specific implementation, the positioning assembly 5 of this embodiment includes a long strip block 51 extending along the length direction of the mounting seat 2, and a plurality of positioning blocks 52 arranged on the long strip block 51, and each positioning block 52 is arranged at intervals along the length direction of the long strip block 51. The advantage of such an arrangement is that the pole group 6 can be positioned synchronously at multiple points to avoid deflection of the pole group 6 when it is displaced in the width direction of the mounting seat 2.

[0064] Moreover, the cell coating device of the present embodiment further comprises a driving unit for driving each positioning assembly 5 to move, and the specific structure of the driving unit can refer to the related driving mechanism commonly used in the existing cell coating equipment, which will not be described in detail here.

[0065] In addition, in this embodiment, as a preferred implementation form, Figure 1 , Figure 6 and Figure 7 As shown in , the clamping portion 3 includes a first clamping unit 31 and a second clamping unit 32 provided on the mounting seat 2. The first clamping unit 31 can cooperate with the second clamping unit 32 to clamp and fix the pole group 6 in two vertical directions.

[0066] In specific implementation, the first clamping unit 31 of this embodiment is preferably set to two relatively arranged on both sides of the mounting seat 2 in the width direction, and the second clamping unit 32 is preferably set to two relatively arranged at both ends of the mounting seat 2 in the length direction, so that the pole group 6 can be effectively clamped to prevent the pole group 6 from falling off.

[0067] Of course, the relevant structural parts not mentioned in the clamping part 3 of this embodiment can all refer to the relevant structural parts commonly seen in existing manipulators, such as Figure 1 , Figure 6 and Figure 7 Only a simple schematic diagram of the clamping part 3 is given, and related driving mechanisms such as cylinders are not shown.

[0068] At this time, see Figure 4As shown, the mounting base 2 of this embodiment may, if necessary, be provided with a connection mechanism thereon for facilitating connection with a robotic arm. For example, the connection mechanism may include a plurality of support columns 21 provided on the mounting base 2, a connection plate 22 provided on each support column 21 and parallel to the mounting base 2, etc.

[0069] The cell coating device of the present embodiment is provided with a plurality of positioning members 41 to elastically press the Mylar film 7 to restrict and fix the Mylar film 7. The negative pressure adsorption effect of the circulation fixture 1 on the Mylar film 7 can be combined to keep the Mylar film 7 from being dragged and deviated when the electrode group 6 is positioned, thereby reducing the subsequent hot melting problem caused by the deviation of the Mylar film 7, thereby helping to reduce the generation rate of defective cells.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell coating device, characterized in that: It includes a circulation fixture that moves along a preset path, and a manipulator that is arranged on one side of the preset path; The manipulator includes a manipulator arm, a mounting seat driven by the manipulator arm, and a clamping portion and a positioning portion arranged on the mounting seat, the positioning portion has a plurality of positioning members elastically and telescopically arranged on the mounting seat, each of the positioning members is used to elastically press the Mylar film adsorbed on the circulation jig by negative pressure, and the clamping portion is used to clamp the electrode group and place the electrode group on the fixed Mylar film.

2. The battery core coating device according to claim 1, characterized in that: The mounting seat is provided with a connecting piece extending along the width direction thereof, and the two extending sections of the connecting piece extending out of the mounting seat are both provided with the positioning piece.

3. The battery core coating device according to claim 2, characterized in that: The connecting members are multiple and arranged at intervals along the length direction of the mounting seat.

4. The battery core coating device according to claim 2, characterized in that: The connecting member is located on one side of the mounting seat in the thickness direction, and the extending section includes a bent portion bent and extended from two ends of the connecting member to the other side of the mounting seat in the thickness direction, and a connecting portion connected to the extended end of the bent portion; Each of the connecting parts is arranged in parallel with the main section of the connecting member, and the positioning members on each of the extending sections are respectively arranged on the corresponding connecting parts.

5. The battery core coating device according to claim 4, characterized in that: Each of the positioning members is slidably arranged on the corresponding connecting portion along the thickness direction of the mounting seat, and an elastic member is arranged between each of the positioning members and the corresponding connecting portion.

6. The battery core coating device according to claim 5, characterized in that: Each of the connecting parts is provided with a sleeve, the positioning members in each of the connecting parts are slidably arranged in the corresponding sleeve, and the elastic member is arranged between the positioning member and the sleeve.

7. The battery cell coating device according to claim 6, characterized in that: The positioning member has a positioning end for pressing and positioning the Mylar film; The elastic member comprises a spring sleeved on the positioning member, one end of the spring abuts against the positioning end, and the other end of the spring abuts against the sleeve.

8. The battery core coating device according to claim 6, characterized in that: The connecting portion is provided with a long hole extending along the length direction of the connecting portion; The sleeve is inserted into the long hole, and nuts for fixing the sleeve are respectively screwed on the upper and lower sides of the connecting part of the sleeve.

9. The battery core coating device according to claim 1, characterized in that: It also includes positioning components arranged on both sides of the circulation fixture, and each of the positioning components is used to position the pole group.

10. The battery core coating device according to any one of claims 1 to 9, characterized in that: The clamping portion includes a first clamping unit and a second clamping unit; The first clamping unit can cooperate with the second clamping unit to clamp and fix the pole group in two vertical directions.

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