Jig and device for wrapping insulating film on bare battery cell

Abstract

The utility model provides a jig and a device for wrapping an insulating film on a naked battery cell, and relates to the jig and the device for wrapping the insulating film on the naked battery cell. The naked battery core insulating film wrapping jig is configured to wrap an insulating film on a naked battery core of which two opposite ends extend out of tabs, and the naked battery core insulating film wrapping jig comprises a main body part which is provided with an object placing surface configured to place the insulating film; the two clamping mechanisms are arranged at the two ends of the main body part respectively and are configured to press the retainer on the end part, extending out of the tab, of the bare cell, and each clamping mechanism comprises a clamping part which is provided with a tab avoiding part for avoiding the tab; and the reset mechanism is connected with the clamping part and applies force to the clamping part towards the other clamping part. When the bare cell is coated with the insulating film, the retainers at the two ends and the insulating film can be subjected to hot melting at the same time, and the hot melting efficiency and the coating efficiency of the insulating film are improved. And the reset mechanism ensures that the holder is always extruded at the end part of the naked battery cell by the clamping part, so that the clamping stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bare battery core insulation film, and in particular to a bare battery core insulation film jig and device. Background Art

[0002] Square shell batteries are widely used due to their high energy density and stability. With the widespread promotion of new energy, blade batteries with top covers at both ends are also increasingly widely used. In the production process of existing batteries, it is necessary to coat the bare batteries with insulating films to insulate and protect the bare batteries. Existing bare battery cell insulating film coating devices are mostly used to place a retaining frame on one side of the bare battery cell, which cannot well meet the requirements of bare battery cells with tabs extending from both ends. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a bare cell package insulation film jig and device to improve the technical problem that the existing bare cell package insulation jig cannot meet the requirements of bare cell package insulation film with tabs extending at both ends.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a bare cell insulation film wrapping jig, which is configured to wrap an insulation film around a bare cell with tabs extending from both opposite ends. The bare cell insulation film wrapping jig comprises:

[0005] The main body is provided with a placement surface, the placement surface is configured to place an insulating film, the insulating film includes a first large surface and a second large surface, and a bare battery cell is placed on the second large surface;

[0006] Two clamping mechanisms are respectively arranged at the two ends of the main body, and are configured to press the retaining frame against the end of the bare battery cell where the pole ear is extended. The clamping mechanism includes: a clamping part, which is provided with a pole ear avoidance part for avoiding the pole ear; a reset mechanism, which is connected to the clamping part and applies a force to the clamping part toward the other clamping part.

[0007] In an exemplary embodiment of the present application, a positioning pin is provided on the placement surface, and the positioning pin is configured to cooperate with a positioning hole on the first large surface of the insulating film.

[0008] In an exemplary embodiment of the present application, a first slide rail is provided at the bottom of the main body, and the reset mechanism includes: a first slider, which is slidably connected to the first slide rail; and an elastic member, which is provided between the clamping portion and the main body to apply a force to the clamping portion toward the other clamping portion when the clamping portion clamps the retaining frame.

[0009] In an exemplary embodiment of the present application, a limit stop portion is disposed on the first slide rail, and the limit stop portion limits the relative sliding of the first sliding block and the first slide rail.

[0010] The present application also provides a bare cell insulating film wrapping device, comprising the jig, loading tooling, upper hot melt tooling and lower hot melt tooling as described in any one of the above items, wherein the jig circulates in sequence among the loading tooling, the upper hot melt tooling and the lower hot melt tooling; the loading tooling comprises: a clamping mechanism, configured to clamp a retaining frame and place it on the end of the bare cell with a pole ear extending therefrom; a clamping mechanism, driving the clamping portion to move away from the main body; the upper hot melt tooling comprises: an upper hot melt portion, configured to hot-melt connect the retaining frame and the first large surface of the insulating film; the lower hot melt tooling comprises: a lower hot melt portion, configured to hot-melt connect the retaining frame and the second large surface of the insulating film.

[0011] In an exemplary bare cell insulating film wrapping device embodiment of the present application, the upper hot melt tooling also includes: a flipping mechanism, configured to fold the second large surface of the insulating film over the top surface of the bare cell; a pressing mechanism, pressing on the surface of the second large surface facing away from the bare cell; and a limiting mechanism, arranged on the side of the main body to limit the movement of the bare cell when the insulating film is folded.

[0012] In an exemplary bare cell insulating film device embodiment of the present application, the clamping portion is provided with a lower shaping avoidance portion and an upper shaping avoidance portion which pass through the clamping portion; the upper hot melt tooling includes an upper shaping portion which passes through the upper shaping avoidance portion and is pressed against the retaining frame; the lower hot melt tooling includes a lower shaping portion which passes through the lower shaping avoidance portion and is pressed against the retaining frame.

[0013] In an exemplary bare battery core insulation film device embodiment of the present application, the upper hot melt tooling also includes an upper hot melt support mechanism, which is arranged on the side of the retaining frame away from the upper hot melt portion; the lower hot melt tooling also includes a lower hot melt support mechanism, which is arranged on the side of the retaining frame away from the lower hot melt portion.

[0014] In an exemplary bare cell insulation film device embodiment of the present application, the reset mechanism includes a traction portion, and the clamping mechanism drives the traction portion to move.

[0015] In an exemplary bare cell core insulation film device embodiment of the present application, a second slider is provided on the jig, and a second slide rail is provided between the loading tooling, the upper hot melt tooling and the lower hot melt tooling, and the second slider cooperates with the slide rail to enable the jig to flow between the loading tooling, the upper hot melt tooling and the lower hot melt tooling.

[0016] The beneficial effects of the utility model are:

[0017] The present application places an insulating film and a bare cell on the storage surface of the main body, and uses the clamping mechanisms at both ends of the main body to press the retaining frame against the end of the bare cell with the pole ear, and clamps the retaining frame at both ends of the bare cell, so that when the bare cell is coated with the insulating film, the retaining frame and the insulating film at both ends can be heat-melted at the same time, thereby improving the efficiency of heat-melting and insulating film coating. The present application uses a reset mechanism to ensure that the clamping part always squeezes the retaining frame against the end of the bare cell, thereby ensuring the stability of the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of an exemplary bare cell insulation film jig of the present application;

[0020] Figure 2 This is a front view of an exemplary bare cell insulation film jig of the present application;

[0021] Figure 3 This is a side view of an exemplary bare cell insulation film jig of the present application;

[0022] Figure 4 This is a schematic diagram of another angle of an exemplary bare cell insulation film jig of the present application;

[0023] Figure 5 This is a schematic diagram of an exemplary insulating film and a bare cell of the present application;

[0024] Figure 6 This is a schematic diagram of an exemplary bare cell insulation film device of the present application;

[0025] Figure 7 This is a schematic diagram of an exemplary loading tooling for this application;

[0026] Figure 8 This is a top view of an exemplary loading tooling of the present application;

[0027] Fig. 9 This is a schematic diagram of one side of an exemplary loading tooling of the present application;

[0028] Fig.10 This is a schematic diagram of another angle on one side of an exemplary loading tooling of the present application;

[0029] Fig.11 This is a schematic diagram of an exemplary hot melt tooling for this application;

[0030] Fig.12 This is a top view of an exemplary lower hot melt tooling of the present application;

[0031] Fig.13 for Fig.12 Middle AA section cutaway view;

[0032] Fig.14 This is a schematic diagram of a single side of an exemplary lower hot melt tooling of the present application;

[0033] Fig.15 This is a schematic diagram of another angle of one side of an exemplary lower hot melt tooling of the present application;

[0034] Fig.16 This is a schematic diagram of an exemplary upper hot melt tooling of the present application;

[0035] Fig.17 A top view of an exemplary upper hot melt tooling of the present application;

[0036] Fig.18 This is a schematic diagram of an exemplary flipping mechanism of the present application;

[0037] Fig.19 This is a schematic diagram of an exemplary upper hot-melt portion structure of the present application;

[0038] Fig. 20 This is a schematic diagram of another angle of an exemplary upper hot-melt portion structure of the present application;

[0039] Fig.21 This is a schematic diagram of the regional structure of an exemplary pressing mechanism of the present application.

[0040] Component number description

[0041] 100, fixture; 110, main body; 111, storage surface; 112, positioning pin; 120, clamping mechanism; 121, clamping part; 1211, tab avoidance part; 1212, lower shaping avoidance part; 1213, upper shaping avoidance part; 122, reset mechanism; 1221, first slider; 1222, elastic member; 1223, traction part; 1224, connecting rod; 130, first slide rail; 131, stopper; 140, second slider; 150, connecting column;

[0042] 200, feeding tool; 210, clamping mechanism; 211, first driving part; 212, first driving block;

[0043] 220, clamping mechanism; 221, clamping portion; 222, clamping drive mechanism; 230, tab shaping mechanism;

[0044] 400, upper hot-melt tooling; 410, turning mechanism; 411, clamping member; 413, third driving unit;

[0045] 414, fourth driving part; 420, pressing mechanism; 430, limiting mechanism; 440, upper shaping part; 450, upper hot-melt part; 460, upper hot-melt supporting mechanism;

[0046] 500, lower hot-melt tooling; 540, lower shaping portion; 550, lower hot-melt portion; 560, lower hot-melt supporting mechanism;

[0047] 600, bare cell; 610, retaining frame; 620, insulating film; 621, first large surface; 622, second large surface; 630, tab;

[0048] 700. Second slide rail. DETAILED DESCRIPTION

[0049] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0050] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0051] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0052] See also Figure 1 to Figure 4The utility model provides a bare cell insulation film wrapping jig, which is used to wrap an insulating film 620 on a bare cell 600 with tabs 630 extending from both opposite ends. The bare cell 600 insulation film 620 jig includes a main body 110 and two clamping mechanisms 120. The main body 110 is provided with a placement surface 111, which is used to place the insulation film 620. The insulation film 620 includes a first large surface 621 and a second large surface 622. The first large surface 621 and the second large surface 622 are respectively wrapped on the two large surfaces of the bare cell 600, thereby achieving the wrapping of the bare cell 600, wherein before wrapping the insulation film 620, the bare cell 600 is placed on the second large surface 622. Exemplarily, a positioning pin 112 is provided on the placement surface 111, and the positioning pin 112 is configured to cooperate with the positioning hole on the first large surface 621 of the insulating film 620. The insulating film 620 is positioned and placed by the cooperation between the positioning pin 112 and the positioning hole. Preferably, there are no less than two positioning pins 112, which can effectively ensure the accurate positioning of the insulating film 620. Two clamping mechanisms 120 are respectively arranged at both ends of the main body 110, that is, the two clamping mechanisms 120 are respectively arranged at both ends of the bare battery cell 600 where the pole ear 630 extends, so as to press the retaining frame 610 against the end of the bare battery cell 600 where the pole ear 630 extends, so as to ensure the stability of the position of the two retaining frames 610, facilitate the simultaneous hot melting of the insulating film 620 and the retaining frames 610 at both ends, and improve the hot melting efficiency.

[0053] See also Figure 1-2 Exemplarily, the clamping mechanism 120 includes a clamping portion 121 and a reset mechanism 122. The clamping portion 121 is provided with a tab avoidance portion 1211 for avoiding the tab 630. The tab 630 is inserted into the tab avoidance portion 1211, so that the clamping portion 121 avoids the tab 630 and abuts against the holder 610. The shape of the clamping portion 121 is adapted to the shape of the holder 610. For example, in one embodiment, a recess is provided on the surface of the holder 610 away from the bare cell 600, and the clamping portion 121 is at least partially inserted into the recess to reduce the stress deformation of the holder 610 and ensure that the holder 610 can be pressed against the bare cell 600. The reset mechanism 122 is connected to the clamping part 121, and applies a force to the clamping part 121 toward the other clamping part 121. In other words, the reset mechanism 122 applies a force to the clamping part 121 along the length direction of the bare battery cell 600. The reset mechanisms 122 on both sides of the main body 110 work together, and the two clamping parts 121 are subjected to opposite forces, so that the retaining frames 610 at both ends of the bare battery cell 600 are pressed together on the bare battery cell 600.

[0054] See also Figure 1-2In an exemplary embodiment of the bare cell insulation film jig, the reset mechanism 122 includes an elastic member 1222, which is disposed between the clamping portion 121 and the main body 110. The elastic force of the elastic member 1222 causes the two clamping portions 121 to be subjected to opposite forces, thereby facilitating the clamping of the clamping portion 121. In order to facilitate the clamping portion 121 to apply force to the retaining frame 610, the contact surface between the clamping portion 121 and the retaining frame 610 protrudes from the connection surface between the elastic member 1222 and the main body 110, and the protruding direction is toward the main body 110, so that the clamping portion 121 can be abutted against the retaining frame 610 while ensuring that the elastic member 1222 is in a stretched state. When the clamping mechanism 120 needs to press the retaining frame 610 onto the bare battery cell 600, the clamping portion 121 is first moved away from the main body 110 through the action of external force, and the elastic member 1222 is stretched. After the retaining frame 610 is placed in a suitable position, the external force disappears or becomes smaller, and the elastic member 1222, under its own elastic action, presses the retaining frame 610 onto the end of the bare battery cell 600 where the pole ear 630 extends.

[0055] See also Figure 1-2 In an exemplary embodiment of a bare cell insulating film jig, a first slide rail 130 is provided at the bottom of the main body 110, and the length direction of the first slide rail 130 is consistent with the length direction of the bare cell 600 placed on the main body 110. The reset mechanism 122 also includes a first slider 1221, which is slidably connected to the first slide rail 130, and the first slider 1221 is relatively fixed to the clamping portion 121. Preferably, the first slider 1221 is relatively fixed to the clamping portion 121 through a connecting rod 1224. By moving the first slider 1221 along the direction of the first slide rail 130, on the one hand, the movement of the clamping part 121 is realized, which facilitates the placement of the retaining frame 610 and presses the retaining frame 610 onto the bare battery cell 600; on the other hand, the first slide rail 130 and the first slider 1221 are slidably matched to guide the clamping part 121, ensuring that the force exerted by the clamping part 121 on the retaining frame 610 is along the length direction of the bare battery cell 600, and the force on the retaining frame 610 is uniform and stable.

[0056] See also Figure 2 In an exemplary embodiment of the bare cell insulation film jig, a limit stop 131 is provided on the first slide rail 130, and the limit stop 131 limits the relative sliding of the first slider 1221 and the first slide rail 130. By providing the limit stop 131 on both first slide rails 130, the two first sliders 1221 are limited to slide toward each other, so as to prevent the clamping part 121 from being too close to the main body 110 when the retaining frame 610 is not placed. At the same time, it can be avoided that after the retaining frame 610 is placed, the position of the clamping part 121 is limited, and the retaining frame 610 is prevented from being deformed by excessive force, thereby ensuring the stability of the retaining frame 610.

[0057] See also Figure 6 The present application also provides a bare cell insulation film wrapping device, comprising any of the above-mentioned jigs 100, loading jigs 200, upper hot melt jigs 400 and lower hot melt jigs 500, and the jigs 100 are circulated in sequence between the loading jigs 200, the upper hot melt jigs 400 and the lower hot melt jigs 500. Exemplarily, a second slider 140 is provided on the jig 100 for wrapping the bare cell 600 with the insulation film 620, and a second slide rail 700 is provided between the loading jigs 200, the upper hot melt jigs 400 and the lower hot melt jigs 500, and the second slider 140 cooperates with the slide rail to enable the jig 100 to flow between the loading jigs 200, the upper hot melt jigs 400 and the lower hot melt jigs 500. Preferably, the second slider 140 is fixed below the main body 110, so as to facilitate the placement of the insulation film 620 and the bare cell 600 on the top surface of the main body 110. A connecting post 150 is provided below the main body 110, and the connecting post 150 is fixed to the second slider 140. By providing the connecting post 150, the distance between the second slider 140 and other components of the jig 100 is increased to prevent the components in the loading tool 200, the upper hot melt tool 400 and the lower hot melt tool 500 from interfering with the components on the jig 100 during the circulation of the jig 100. Exemplarily, the length direction of the second slide rail 700 is perpendicular to the length direction of the bare cell 600. In other words, the circulation direction of the jig 100 is perpendicular to the length direction of the bare cell 600, which facilitates the operation of covering the bare cell 600 with the insulating film 620. Preferably, at least two second sliders 140 are provided on the jig 100. On the one hand, the stability of the jig 100 during circulation is improved to avoid problems such as overturning of the jig 100 during circulation due to excessive weight of the bare battery cell 600 placed on the main body 110; on the other hand, the accuracy of the positioning of the jig 100 is improved to avoid problems such as deflection of the jig 100 at a designated work station, thereby ensuring the accuracy of the insulating film 620 wrapping the bare battery cell 600 and improving the yield rate.

[0058] See also Figure 7 to Figure 10 In an exemplary bare cell insulating film wrapping device embodiment of the present application, the loading tool 200 includes a clamping mechanism 220 and an opening clamping mechanism 210. The clamping mechanism 220 clamps the retaining frame 610 and places it at the end of the bare cell 600 where the pole ear 630 extends; the opening clamping mechanism 210 drives the clamping part 121 to move away from the main body 110, so as to facilitate the clamping mechanism 220 to place the retaining frame 610 at the end of the bare cell 600, and then the opening clamping mechanism 210 moves in the opposite direction, and the clamping part 121 presses the retaining frame 610 to the end of the bare cell 600 under the action of the resetting mechanism 122.

[0059] See also Figure 8 to Figure 10Exemplarily, the clamping mechanism 220 includes a clamping portion 221 and a clamping drive mechanism 222. The clamping drive mechanism 222 can drive the clamping portion 221 to move in three axes, so that the clamping portion 221 can place the retaining frame 610 at the end of the bare battery cell 600.

[0060] See also Figure 8 to Figure 10 Exemplarily, the clamping mechanism 210 includes a first driving part 211 and a first driving block 212. The first driving part 211 can be an electric telescopic rod, a hydraulic cylinder, a pneumatic cylinder, or other mechanisms that drive the first driving block 212 to make linear reciprocating movements. The first driving part 211 drives the first driving block 212 to make linear reciprocating movements, driving the clamping part 121 to make linear reciprocating movements, thereby clamping the retaining frame 610. Exemplarily, the reset mechanism 122 includes a traction portion 1223, which is arranged below the clamping portion 121 and fixed relative to the clamping portion 121. When the retaining frame 610 needs to be clamped, the two first drive blocks 212 respectively abut against the facing surfaces of the two traction portions 1223, and then the first drive portion 211 drives the traction portion 1223 to move away from the main body 110, so that the two clamping portions 121 move away from each other. After placing the retaining frame 610, the two first drive blocks 212 move toward each other. Under the action of the elastic member 1222, the two clamping portions 121 move toward each other, and the retaining frame 610 abuts against the bare battery cell 600.

[0061] See also Figure 8 to Figure 10 Exemplarily, the loading tool 200 also includes a pole lug shaping mechanism 230, and the pole lug shaping mechanism 230 shapes the pole lug 630 by clamping the pole lug 630. The loading tool 200 also includes a bare cell 600 loading mechanism, etc. This application will not elaborate on this, please refer to the existing loading tool 200.

[0062] See also Figure 11 to Figure 15, exemplarily, the lower hot melt tooling 500 includes a lower hot melt portion 550 and a lower hot melt supporting mechanism 560, and the lower hot melt portion 550 and the lower hot melt supporting mechanism 560 are both provided with two, and the two lower hot melt portions 550 are symmetrically arranged at both ends of the main body 110, and the two lower hot melt supporting mechanisms 560 are also symmetrically arranged at both ends of the main body 110, and the lower hot melt portion 550 is used to hot-melt the second large surface 622 of the retaining frame 610 and the insulating film 620. The lower hot melt supporting mechanism 560 is provided The lower hot-melt support mechanism 560 is placed on the side of the retaining frame 610 away from the lower hot-melt portion 550. When the lower hot-melt portion 550 connects the retaining frame 610 and the second large surface 622 by hot-melting, the lower hot-melt support mechanism 560 is pressed against the side of the retaining frame 610 away from the hot-melt portion, thereby preventing the retaining frame 610 from shifting, deforming, etc. After the retaining frame 610 and the second large surface 622 are hot-melted, the lower hot-melt support mechanism 560 is shifted away from the retaining frame 610, the bare battery cell 600, etc., so that the jig 100 can be transferred to the next tooling. In one embodiment, when the retaining frame 610 and the second large surface 622 are hot-melted, the lower hot-melt support mechanism 560 is pressed against the retaining frame 610 and the bare battery cell 600 at the same time, further ensuring that the relative position of the retaining frame 610 and the bare battery cell 600 is stable, thereby improving product quality.

[0063] See also Figure 3 , Fig.13 Exemplarily, the clamping portion 121 is provided with a lower shaping avoidance portion 1212 that passes through the clamping portion 121, and the lower shaping avoidance portion 1212 is provided at the lower edge of the retaining frame 610. The lower hot melt tooling 500 also includes a lower shaping portion 540, and the lower shaping portion 540 passes through the lower shaping avoidance portion 1212 and presses on the retaining frame 610. The lower shaping portion 540 rests on the lower edge of the retaining frame 610, and the lower shaping portion 540 does not protrude from the lower edge of the retaining frame 610. By pressing the lower shaping portion 540 against the retaining frame 610, the lower edge of the retaining frame 610 is shaped, which can not only ensure a good hot melt effect, but also reduce the deformation of the retaining frame 610 during the hot melt process, thereby ensuring the functionality of the retaining frame 610. When the hot melt is completed, the lower shaping portion 540 withdraws from the lower shaping avoidance portion 1212 to avoid affecting the circulation of the fixture 100.

[0064] See also Figure 16 to Figure 21Exemplarily, the upper hot melt tooling 400 includes an upper hot melt portion 450 and an upper hot melt supporting mechanism 460. The upper hot melt portion 450 and the upper hot melt supporting mechanism 460 are respectively provided with two, and the two upper hot melt portions 450 are symmetrically arranged at both ends of the main body 110. The two upper hot melt supporting mechanisms 460 are symmetrically arranged at both ends of the main body 110. The upper hot melt portion 450 is used to hot-melt connect the surface of the retaining frame 610 away from the second large surface 622 and the first large surface 621 of the insulating film 620, thereby realizing the insulation film 620 wrapping of the bare battery cell 600. The upper hot melt support mechanism 460 is arranged on the side of the retaining frame 610 away from the upper hot melt portion 450. When the upper hot melt portion 450 connects the retaining frame 610 and the first large surface 621 by hot melt, the upper hot melt support mechanism 460 presses against the side of the retaining frame 610 away from the upper hot melt portion 450. Preferably, the upper hot melt support mechanism 460 presses against the retaining frame 610 and the bare battery cell 600, thereby ensuring the relative position of the retaining frame 610 and the bare battery cell 600 is stable, reducing the deformation of the retaining frame 610, etc. It should be noted that when the retaining frame 610 and the second large surface 622 are firstly hot melted and then the retaining frame 610 and the first large surface 621 are hot melted, the upper hot melt support mechanism 460 abuts against the first large surface 621, and the force is applied to the retaining frame 610 and the bare battery cell 600 through the first large surface 621.

[0065] See also Figure 3 , Fig.19 In an exemplary bare cell core insulation film device embodiment of the present application, the clamping portion 121 is provided with an upper shaping avoidance portion 1213 penetrating the clamping portion 121, and the upper shaping avoidance portion 1213 is provided at the upper edge of the retaining frame 610. The upper hot melt tooling 400 includes an upper shaping portion 440, and the upper shaping portion 440 penetrates the upper shaping avoidance portion 1213 and presses against the retaining frame 610, and the upper shaping portion 440 presses against the lower edge of the retaining frame 610 and does not exceed the lower edge of the retaining frame 610, thereby realizing the shaping of the hot melt connection between the retaining frame 610 and the first large surface 621, ensuring that the edges of the retaining frame 610 are flat before, during, and after hot melting, and all maintain a good shape.

[0066] See also Fig.16 , Fig.18In an exemplary bare cell insulation film device embodiment of the present application, the upper hot melt tooling 400 also includes a flipping mechanism 410, which is used to fold the second large surface 622 of the insulation film 620 to cover the top surface of the bare cell 600. The flipping mechanism 410 is symmetrically arranged on both sides of the main body 110, so as to clamp and fold the second large surface 622 on both sides at the same time, avoid deformation of the second large surface 622 during the folding process, and ensure that the folding position of the second large surface 622 is accurate. The flipping mechanism 410 includes a clamping member 411, a second driving unit, a third driving unit 413 and a fourth driving unit 414, wherein the second driving unit drives the clamping member 411 to clamp the second large surface 622. Exemplarily, the second driving unit can be a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, etc., or can be other mechanisms that can drive the clamping member 411 to do linear reciprocating motion. In other embodiments, the clamping member 411 performs an opening and closing action, and the second driving part can be a mechanism such as a motor, a hydraulic cylinder, or a cylinder that drives the clamping member 411 to reciprocate around the rotation axis. The third driving part 413 drives the second driving part and the clamping member 411 to rotate together, so that the clamping member 411 rotates during the folding process of the second large surface 622, avoiding problems such as bending and damage to the second large surface 622. The third driving part 413 is preferably a motor to drive the second driving part and the clamping member 411 to rotate together. The motor is preferably a servo motor to achieve the synchronous rotation of the second driving part and the clamping member 411 and the second large surface 622, avoiding problems such as bending and damage other than the preset position during the folding process of the second large surface 622. The fourth driving part 414 drives the third driving part 413, the second driving part, and the clamping member 411 to move together through two axes, and the two-axis movement is respectively along the width direction of the bare battery cell 600 and the height direction of the bare battery cell 600. Through the joint action of the fourth driving unit 414, the third driving unit 413, the second driving unit and the clamping member 411, the second large surface 622 of the insulating film 620 is folded to cover the top surface of the bare battery cell 600, and the second large surface 622 is prevented from bending, deformation, and damage during the folding process, thereby improving the yield rate. The fourth driving unit 414 can be a combination of a motor and a lead screw, or a combination of other mechanisms that realize two-axis movement.

[0067] See also Fig.16 , Fig.21 In an exemplary bare cell insulation film device embodiment of the present application, the upper hot melt tooling 400 further includes a limiting mechanism 430, which is disposed on the side of the main body 110 to limit the movement of the bare cell 600 when the insulation film 620 is folded. The limiting mechanism 430 abuts against the side wall of the bare cell 600, and when the folding mechanism folds the second large surface 622 of the insulation film 620, the bare cell 600 is prevented from moving, ensuring that after folding, the second large surface 622 can accurately cover the preset position on the top surface of the bare cell 600.

[0068] See also Fig.16 , Fig.21In an exemplary embodiment of the bare cell 600 wrapped with an insulating film 620 device of the present application, the pressing mechanism 420 presses on the surface of the second large surface 622 away from the bare cell 600, and after the folding mechanism folds the second large surface 622 over the top surface of the bare cell 600, the pressing mechanism 420 presses the second large surface 622 tightly against the bare cell 600, so as to facilitate the upper hot-melt portion 450 to hot-melt the retaining frame 610 and the bare cell 600. Preferably, the surface of the pressing mechanism 420 in contact with the second large surface 622 is a plane to ensure the flatness of the second large surface 622.

[0069] The utility model of the bare cell insulation film package device can simultaneously perform heat melting on the retaining frame and the insulation film from both ends of the bare cell to improve production efficiency. During the heat melting, the upper edge and the lower edge of the retaining frame are respectively shaped by the upper shaping part and the lower shaping part to ensure that the edge of the retaining frame is flat, which has the beneficial effect of improving the yield rate. Therefore, the utility model effectively overcomes some practical problems in the prior art and has a high utilization value and use significance. The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A bare cell insulation film wrapping jig, configured to wrap an insulation film around a bare cell with tabs extending from both opposite ends, characterized in that: include: The main body is provided with a placement surface, the placement surface is configured to place an insulating film, the insulating film includes a first large surface and a second large surface, and a bare battery cell is placed on the second large surface; Two clamping mechanisms are respectively arranged at two ends of the main body, and are configured to press the retaining frame tightly against the end of the bare cell where the tab extends. The clamping mechanism includes: The clamping portion is provided with a tab avoidance portion for avoiding the tab; The reset mechanism is connected to the clamping part and applies a force to the clamping part toward the other clamping part.

2. The bare battery core insulation film jig according to claim 1, characterized in that: The placement surface is provided with positioning pins, and the positioning pins are configured to cooperate with the positioning holes on the first large surface of the insulating film.

3. The bare battery core insulation film jig according to claim 1, characterized in that: A first slide rail is provided at the bottom of the main body, and the reset mechanism comprises: A first sliding block, slidably connected to the first sliding rail; The elastic member is arranged between the clamping portion and the main body so as to apply a force to the clamping portion toward the other clamping portion when the clamping portion clamps the retaining frame.

4. The bare battery core insulation film jig according to claim 3, characterized in that: The first slide rail is provided with a limit stop portion, and the limit stop portion limits the relative sliding of the first sliding block and the first slide rail.

5. A bare cell insulation film device, characterized in that: The jig comprises the jig, the loading jig, the upper hot melt jig and the lower hot melt jig according to any one of claims 1 to 4, wherein the jig is sequentially transferred between the loading jig, the upper hot melt jig and the lower hot melt jig; The feeding tooling comprises: A clamping mechanism is configured to clamp the retaining frame and place it on the end of the bare battery cell where the tab extends; The clamping mechanism drives the clamping portion to move away from the main body; The upper hot melt tooling comprises: an upper heat-melting portion configured to heat-melt the retaining frame and the first large surface of the insulating film; The lower hot melt tooling comprises: The lower heat-fusion portion is configured to heat-fusion-connect the retaining frame and the second large surface of the insulating film.

6. The bare battery core insulation film device according to claim 5, characterized in that: The upper hot melt tooling also includes: A flipping mechanism, configured to fold the second large surface of the insulating film over to cover the top surface of the bare battery cell; A pressing mechanism is pressed on the surface of the second large surface away from the bare battery cell: A limiting mechanism is arranged on the side of the main body to limit the movement of the bare battery cell when the insulating film is folded.

7. The bare battery core insulation film device according to claim 5, characterized in that: The clamping portion is provided with a lower shaping avoidance portion and an upper shaping avoidance portion that penetrate the clamping portion; The upper hot melt tooling comprises an upper shaping portion, which penetrates through the upper shaping avoidance portion and presses against the retaining frame; The lower hot melt tooling comprises a lower shaping portion, and the lower shaping portion penetrates through the lower shaping avoidance portion and presses against the retaining frame.

8. The bare battery core insulation film device according to claim 5, characterized in that: The upper hot melt tooling also includes an upper hot melt support mechanism, and the upper hot melt support mechanism is arranged on a side of the retaining frame away from the upper hot melt portion; The lower hot melt tooling also includes a lower hot melt supporting mechanism, and the lower hot melt supporting mechanism is arranged on a side of the retaining frame away from the lower hot melt portion.

9. The bare battery core insulation film device according to claim 5, characterized in that: The resetting mechanism comprises a traction part, and the clamping mechanism drives the traction part to move.

10. The bare battery core insulation film device according to claim 5, characterized in that: A second slider is provided on the jig, and a second slide rail is provided between the loading tooling, the upper hot melt tooling and the lower hot melt tooling. The second slider cooperates with the slide rail to enable the jig to flow between the loading tooling, the upper hot melt tooling and the lower hot melt tooling.

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