Battery monomer and rubberizing mechanism

Abstract

The utility model discloses a battery monomer and a rubberizing mechanism, and belongs to the technical field of battery manufacturing equipment. Comprising an insulating part, a battery cell main body and a connecting piece, the insulating part is adhered to the battery cell main body, and the connecting piece is welded with a tab of the battery cell main body; the insulating part comprises a first adhesive part, a second adhesive part and a non-adhesive part, and the first adhesive part and the second adhesive part are arranged on the two sides of the non-adhesive part in the width direction of the insulating part; the non-adhesive part covers a tab of the battery cell main body, one of the first adhesive part and the second adhesive part is adhered to the battery cell main body, and the other one of the first adhesive part and the second adhesive part is adhered to the connecting piece; the distance between the connecting piece and the battery cell main body in the vertical direction is h, the width of the non-sticky part in the width direction of the insulating part is a, and a is larger than h. As no adhesive is arranged on one surface, close to the tab, of the non-adhesive part, no external pulling force is applied to the diaphragm and the tab, and the beneficial effects of protecting the diaphragm and the tab and preventing failure caused by pulling deformation are achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery manufacturing equipment, and specifically relates to a battery cell and a gluing mechanism. Background Art

[0002] At present, batteries are widely used in industrial production, life and other aspects. The battery cell is an important part of the battery. In order to ensure the reliability and safety of the battery, it is necessary to stick tape on the side of the battery cell. Therefore, the quality of the adhesive on the battery cell directly affects the quality of the battery.

[0003] In the prior art, in the gluing station in the field of battery manufacturing equipment technology, a fixed gluing head is usually used to glue the battery cells. By setting a tape wheel, a glue pressing assembly, a cutting assembly, a glue clamping assembly and a glue suction assembly, the automated operation of gluing the battery cells is achieved.

[0004] However, when the glue suction component is pressed down to glue the battery cell, the force of the glue suction component is likely to pull the diaphragm on the outer ring of the battery cell, causing the local outer ring diaphragm and the pole ear to be pulled, and the diaphragm is prone to wrinkling or deformation, and the pole ear is torn, thereby affecting the gluing quality of the battery cell, reducing the qualified rate of the product, and reducing the production capacity of qualified battery cell products. Although the two ends of the outer ring diaphragm are set as bonding areas and the middle part of the outer ring diaphragm is set as a non-bonding area in the prior art, the bonding areas at both ends of the outer ring diaphragm may deform and extend during the pulling process to contact and bond with the middle part of the pole ear, and there is a risk of the pole ear being torn. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a battery cell and a gluing mechanism, which can solve the problem of pulling the diaphragm and the tab when the gluing mechanism in the prior art affixes the insulating part to the battery body.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] An embodiment of the present application provides a battery cell, comprising an insulating member, a battery cell body and a connecting sheet, wherein the insulating member is adhered to the battery cell body, and the connecting sheet and the tabs of the battery cell body are welded; the insulating member comprises a first adhesive portion, a second adhesive portion and a non-adhesive portion, and the first adhesive portion and the second adhesive portion are arranged on both sides of the non-adhesive portion along the width direction of the insulating member; the non-adhesive portion covers the tabs of the battery cell body, one of the first adhesive portion and the second adhesive portion is adhered to the battery cell body, and the other of the first adhesive portion and the second adhesive portion is adhered to the connecting sheet; wherein the distance between the connecting sheet and the battery cell body along the vertical direction is h, and the width of the non-adhesive portion along the width direction of the insulating member is a, wherein a>h.

[0008] In an embodiment of the present application, the insulating member is configured to prevent the contact between the pole tab and the battery cell body. Furthermore, the insulating member includes a first adhesive portion, a second adhesive portion and a non-adhesive portion. While the first adhesive portion and the second adhesive portion are respectively bonded to the connecting piece and the battery cell body, since the non-adhesive portion has no adhesive on a side close to the pole tab, it will not adhere to the pole tab and the diaphragm, and further will not apply a pulling force to the diaphragm and the pole tab, thereby having the beneficial effect of protecting the diaphragm and the pole tab from failure caused by pulling deformation.

[0009] Furthermore, when the insulating member is bonded to the battery cell body, the connecting piece is arranged at the upper end of the battery cell body, and the connecting piece and the tab of the battery cell body are welded, the projections of the connecting piece and the battery cell body overlap in the vertical direction, and the distance between the connecting piece and the battery cell body is h, and the width a of the non-adhesive portion is greater than the distance between the connecting piece and the battery cell body. Specifically, the non-adhesive portion is sandwiched between the first adhesive portion and the second adhesive portion along the width direction of the insulating member, and the width of the non-adhesive portion along the width direction of the insulating member is a. In practical applications, in order to prevent the edge of the first adhesive portion close to the non-adhesive portion or the edge of the second adhesive portion close to the non-adhesive portion from being bonded to the connecting piece, the width a of the non-adhesive portion needs to be greater than the distance between the connecting piece and the battery cell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a connection diagram of the insulating member and the battery cell body in an embodiment of the present application;

[0011] Figure 2 It is a structural schematic diagram of the glue sticking mechanism in the embodiment of the present application;

[0012] Figure 3 It is a structural schematic diagram of the connection between the variable distance glue suction component and the insulating member in the embodiment of the present application;

[0013] Figure 4 It is a structural schematic diagram of the embodiment of the present application in which the variable-distance glue suction component moves to drive the insulating member to bend inward;

[0014] Figure 5 It is a schematic diagram of the structure of the insulating member in the embodiment of the present application.

[0015] Description of reference numerals:

[0016] 1. Battery cell body; 2. Tab; 10. First adhesive member; 11. Second adsorption hole group; 111. Second adsorption hole; 20. Second adhesive member; 21. Glue absorption part; 211. First adsorption hole group; 2111. First adsorption hole; 22. Driving part; 23. Slider; 30. Bracket; 40. Driving part; 50. Insulating part; 51a. First adhesive part; 51b. Second adhesive part; 52. Non-adhesive part; X. First direction; Y. Second direction. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] The battery cell and the gluing mechanism provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0020] See also Figures 1 to 5 , an embodiment of the present application provides a battery cell, including an insulating member 50, a battery cell body 1 and a connecting sheet, the insulating member 50 is adhered to the battery cell body 1, and the connecting sheet and the pole ear 2 of the battery cell body 1 are welded; the insulating member 50 includes a first adhesive portion 51a, a second adhesive portion 51b and a non-adhesive portion 52, and the first adhesive portion 51a and the second adhesive portion 51b are arranged on both sides of the non-adhesive portion 52 along the width direction of the insulating member 50; the non-adhesive portion 52 covers the pole ear 2 of the battery cell body 1, one of the first adhesive portion 51a and the second adhesive portion 51b is adhered to the battery cell body 1, and the other of the first adhesive portion 51a and the second adhesive portion 51b is adhered to the connecting sheet; wherein, the distance between the connecting sheet and the battery cell body 1 along the vertical direction is h, and the width of the non-adhesive portion 52 along the width direction of the insulating member 50 is a, wherein a>h.

[0021] In the embodiment of the present application, when the insulating member 50 is bonded to the battery cell body 1, the connecting piece is arranged at the upper end of the battery cell body 1, and the connecting piece and the pole ear 2 of the battery cell body 1 are welded, the projections of the connecting piece and the battery cell body 1 overlap in the vertical direction, and the distance between the connecting piece and the battery cell body 1 is h, and the width a of the non-adhesive portion 52 is greater than the distance between the connecting piece and the battery cell body 1. Specifically, the non-adhesive portion 52 is sandwiched between the first adhesive portion 51a and the second adhesive portion 51b along the width direction of the insulating member 50, and the width of the non-adhesive portion 52 along the width direction of the insulating member 50 is a. In practical applications, the width a of the non-adhesive portion 52 is greater than the distance between the connecting piece and the battery cell body 1, which can achieve the technical effect of preventing the edge of the first adhesive portion 51a close to the non-adhesive portion 52 or the edge of the second adhesive portion 51b close to the non-adhesive portion 52 from being bonded to the connecting piece.

[0022] Optionally, in the embodiment of the present application, the width of the insulating member 50 is A, and the widths of the first adhesive portion 51a and the second adhesive portion 51b along the width direction of the insulating member 50 are both b, wherein 20% A≤a≤70% A, 15% A≤b≤40% A, and 3mm≤ah≤5mm.

[0023] In the embodiment of the present application, the first adhesive portion 51a and the second adhesive portion 51b are provided to achieve the connection between the insulating member 50 and the battery cell body 1 and the connecting sheet, thereby achieving the setting of the non-adhesive portion 52 corresponding to the pole lug 2. Specifically, in practical applications, the width of the non-adhesive portion 52 is greater than or equal to 20% of the width of the insulating member 50 and less than or equal to 70% of the width of the insulating member 50. The size of the non-adhesive portion 52 can effectively cover the pole lug 2 to prevent the diaphragm and the pole lug 2 from being pulled by external forces. The width of the first adhesive portion 51a and the second adhesive portion 51b is greater than or equal to 15% of the width of the insulating member 50 and less than or equal to 40% of the width of the insulating member 50. The size of the first adhesive portion 51a and the second adhesive portion 51b can be stably bonded to the battery cell body 1 and the connecting sheet, thereby also having the function of stabilizing the non-adhesive portion 52.

[0024] Furthermore, the difference in distance between the non-adhesive portion 52 and the connecting piece and the battery body 1 is greater than or equal to 3 mm and less than or equal to 5 mm. In practical applications, if the above difference is less than 3 mm, the redundancy of the non-adhesive portion 52 is insufficient, and the diaphragm may still be pulled; if the above difference is greater than 5 mm, the redundancy of the non-adhesive portion 52 is large, and folding may occur inside the diaphragm. Therefore, after limiting the above difference, the diaphragm can be prevented from folding while preventing the diaphragm from being pulled, which has the beneficial effect of improving the insulating member 50 to protect the diaphragm and the tab 2.

[0025] Specifically, please see the following test table, which provides nine test groups, each test group includes 100 identical test battery cells. The battery cells in each test group have the same structure except for at least one parameter value of the width a of the non-adhesive portion 52 along the width direction of the insulating part 50 and the distance h between the connecting plate and the battery cell body 1 in the vertical direction. a and h can be measured with a tape measure, and each data is measured three times with a tape measure to take the average value. The diaphragm breaking rate is the ratio of the number of battery cells in each test group whose diaphragms are broken by the glue sticking mechanism to the total number of single cells in the test group. The diaphragm folding rate is the ratio of the number of battery cells in each test group whose diaphragms are folded during the film pulling process of the glue sticking mechanism to the total number of single cells in the test group.

[0026] Test Group a(mm) h(mm) ah(mm) Diaphragm breaking rate Diaphragm folding rate 1 19 18.5 0.5 100％ 0 2 19 17 2 5％ 0 3 19 16 3 2％ 0 4 19 15 4 0 0 5 19 14 5 0 3％ 6 19 13 6 0 61％ 7 19 10 9 0 100％ 8 14 10 4 0 0 9 17 13 4 0 0

[0027] Through the data analysis in the above test table, it can be seen that when 3mm≤ah≤5mm, the diaphragm breaking rate and the diaphragm folding rate are at a low level, when ah<3mm, the diaphragm breaking rate is relatively high, and when 5mm<ah, the diaphragm folding rate is relatively high.

[0028] Optionally, in an embodiment of the present application, a glue sticking mechanism is further disclosed, which is used to stick the insulating member 50 as described above to the battery core body 1, including a variable-distance glue suction component, the variable-distance glue suction component including a main body, a first glue suction component 10 and a second glue suction component 20, the first glue suction component 10 and the second glue suction component 20 are both connected to the main body, and at least one of the first glue suction component 10 and the second glue suction component 20 is movably connected to the main body, the second glue suction component 20 and / or the first glue suction component 10 can move along the first direction X to increase or decrease the interval between the second glue suction component 20 and the first glue suction component 10; the first glue suction component 10 and the second glue suction component 20 respectively absorb the first adhesive portion 51a and the second adhesive portion 51b, and when the distance between the second glue suction component 20 and the first glue suction component 10 is reduced, the non-adhesive portion 52 is bent toward the main body in an arch shape.

[0029] In the embodiment of the present application, the gluing mechanism is used to stick the above-mentioned insulating member 50 to the battery cell body 1. The gluing mechanism sticks the above-mentioned insulating member 50 to the battery cell body 1, thereby protecting the diaphragm and the tab 2 of the battery cell body 1 from being pulled by external forces. Specifically, the first glue-absorbing member 10 and the second glue-absorbing member 20 can move relative to each other, and the first glue-absorbing member 10 and the second glue-absorbing member 20 adsorb the first adhesive portion 51a and the second adhesive portion 51b respectively. In actual application, the first glue-absorbing member 10 and the second glue-absorbing member 20 first adsorb the first adhesive portion 51a and the second adhesive portion 51b respectively, and then at least one of the second glue-absorbing member 20 and the first glue-absorbing member 10 moves along the first direction X, so that the interval between the second glue-absorbing member 20 and the first glue-absorbing member 10 increases or decreases, and the distance between the adsorbed first adhesive portion 51a and the second adhesive portion 51b also increases or decreases accordingly. When the interval between the second adhesive absorbing member 20 and the first adhesive absorbing member 10 is reduced, the distance between the first adhesive portion 51a and the second adhesive portion 51b is also reduced, and the non-adhesive portion 52 is bent toward the main body to form an arch shape to form redundancy. At this time, the non-adhesive portion 52 corresponds to the tab 2, and then the first adhesive portion 51a and the second adhesive portion 51b are bonded to the battery body 1 and the connecting sheet, so as to achieve the beneficial effects of insulation and preventing the insulating member 50 from pulling the diaphragm and the tab 2.

[0030] Further, the first glue absorbing member 10 is fixed and the second glue absorbing member 20 moves along the first direction X, so that the interval between the two can be changed; the first glue absorbing member 10 moves along the first direction X and the second glue absorbing member 20 is fixed, so that the interval between the two can be changed; the first glue absorbing member 10 moves along the first direction X and the second glue absorbing member 20 also moves along the first direction X, but the moving speeds of the two are different, and the interval between the two can be changed in the same time, or the moving speeds of the two are the same, and the interval between the two can be changed in different time. This embodiment does not specifically limit how the distance between the two is increased or decreased.

[0031] It should be noted that the insulating member 50 includes a first adhesive portion 51a, a second adhesive portion 51b and a non-adhesive portion 52, and the first adhesive portion 51a and the second adhesive portion 51b are arranged on both sides of the non-adhesive portion 52 along the width direction of the insulating member 50. It is precisely because the insulating member 50 has the above structural features that when the adhesive structure and the insulating member 50 are used in combination, the insulating member 50 is attached to the battery body 1 to achieve the beneficial effects of insulation and preventing the insulating member 50 from pulling the diaphragm and the tab 2.

[0032] Optionally, in an embodiment of the present application, the main body includes a bracket 30, and the second glue absorbing component 20 includes a glue absorbing portion 21 and a driving portion 22; the first glue absorbing component 10 is fixedly connected to the bracket 30, and the driving portion 22 is fixedly connected to the bracket 30, and the glue absorbing portion 21 and the driving portion 22 are connected. The driving portion 22 is used to drive the glue absorbing portion 21 to move relative to the first glue absorbing component 10 along the first direction X, so that the interval between the glue absorbing portion 21 and the first glue absorbing component 10 increases or decreases.

[0033] In the embodiment of the present application, the first glue absorbing component 10 is fixedly connected to the bracket 30, and the second glue absorbing component 20 includes a glue absorbing portion 21 and a driving portion 22, wherein the driving portion 22 is fixedly connected to the bracket 30, and the glue absorbing portion 21 is connected to the driving portion 22. The driving portion 22 is configured to drive the glue absorbing portion 21 to move along the first direction X, and the first glue absorbing component 10 is fixedly connected to the bracket 30. When the driving portion 22 drives the glue absorbing portion 21 to move, the interval between the glue absorbing portion 21 and the first glue absorbing component 10 changes, so that the interval between the glue absorbing portion 21 and the first glue absorbing component 10 increases or decreases, thereby realizing that the non-adhesive portion 52 is bent toward the main body in an arched shape.

[0034] Optionally, in the embodiment of the present application, a change in the interval between the glue absorbing portion 21 and the first glue absorbing member 10 along the first direction X is L, wherein 3 mm ≤ L ≤ 5 mm.

[0035] In the embodiment of the present application, the amount of change between the adhesive suction part 21 and the first adhesive suction part 10 along the first direction X is L, and the amount of change is greater than or equal to 3 mm and less than or equal to 5 mm. When the amount of change is less than 3 mm, the non-adhesive part 52 is less bent toward the main body and the degree of arching is less, and the pole lug 2 cannot be well covered; when the amount of change is greater than 5 mm, the non-adhesive part 52 with a certain width limitation may be bent and cannot cover the pole lug 2 well. The amount of change within the above range can better cover the pole lug 2 with the non-adhesive part 52, and has the beneficial effect of preventing external forces from pulling the diaphragm and the pole lug 2.

[0036] Optionally, in an embodiment of the present application, a first adsorption hole group 211 is provided at one end of the adhesive suction portion 21 away from the bracket 30, and a plurality of second adsorption hole groups 11 are provided at one end of the first adhesive suction member 10 away from the bracket 30, and both the first adsorption hole group 211 and the second adsorption hole group 11 are connected to an external negative pressure adsorption device; the first adsorption hole group 211 is adsorbed to one of the first adhesive portion 51a and the second adhesive portion 51b, and the second adsorption hole group 11 is adsorbed to the other of the first adhesive portion 51a and the second adhesive portion 51b.

[0037] In the embodiment of the present application, the first adsorption hole group 211 and the second adsorption hole group 11 are configured to achieve adsorption of the first adhesive portion 51a and the second adhesive portion 51b, thereby driving the first adhesive portion 51a or the second adhesive portion 51b to move while the driving portion 22 drives the adhesive suction portion 21 to move, thereby driving the non-adhesive portion 52 to bend toward the main body in an arch shape.

[0038] Optionally, in the embodiment of the present application, the first adsorption hole group 211 includes a plurality of first adsorption holes 2111 arranged in an array; the second adsorption hole group 11 includes a plurality of second adsorption holes 111 arranged in an array.

[0039] In the embodiment of the present application, the plurality of first adsorption holes 2111 arranged in an array can increase the adsorption area and adsorption stability of the insulating member 50. When the adhesive suction part 21 moves along the first direction X, the plurality of first adsorption holes 2111 arranged in an array can stably adsorb the insulating member 50 to prevent the insulating member 50 from falling or shifting during the movement of the adhesive suction part 21. The plurality of second adsorption holes 111 arranged in an array can increase the adsorption area and adsorption stability of the insulating member 50. When the adhesive suction part moves along the first direction X, the plurality of second adsorption holes 111 arranged in an array can stably adsorb the one of the first adhesive part 51a and the second adhesive part 51b that does not move with the adhesive suction part 21, which can prevent the one of the first adhesive part 51a and the second adhesive part 51b that does not move with the adhesive suction part 21 from falling or shifting and causing pulling during the movement of the adhesive suction part 21.

[0040] Optionally, in an embodiment of the present application, the second glue suction component 20 further includes a slide rail and a slider 23, the slide rail and the slider 23 are slidably connected, the slider 23 and the glue suction part 21 are fixedly connected, the driving part 22 is connected to the slider 23, the slide rail extends along the first direction X, and the driving part 22 drives the slider 23 to slide along the slide rail.

[0041] In the embodiment of the present application, the slide rail and the slider 23 are configured to limit the motion trajectory of the glue sucking part 21 to stabilize the motion path of the glue sucking part 21. Specifically, the driving part 22 is configured to drive the slider 23 to move along the slide rail, and the slider 23 and the glue sucking part 21 are fixedly connected. When the driving part 22 drives the slider 23 to move, the slider 23 drives the glue sucking part 21 to slide along the slide rail, so that the glue sucking part 21 moves along the first direction X, thereby changing the interval between the glue sucking part 21 and the first glue sucking member 10.

[0042] Optionally, in an embodiment of the present application, the slide rail includes at least two slide rail parts, the two slide rail parts are parallel to each other, and the two slide rail parts are both slidably connected to the slide rail.

[0043] In the embodiment of the present application, two mutually parallel slide rails are arranged opposite to each other, which has the beneficial effect of improving the stable movement of the glue suction component.

[0044] Optionally, in an embodiment of the present application, the glue sticking mechanism according to any one of claims 1 to 3 further includes: a driving member 40; the driving member 40 is connected to the variable distance glue suction component, and the driving member 40 is used to drive the variable distance glue suction component to move along the first direction Y; wherein the first direction X and the first direction Y are perpendicular.

[0045] In the embodiment of the present application, the drive member 40 is configured to drive the variable-distance glue suction assembly to move as a whole. Specifically, the drive member 40 drives the variable-distance glue suction assembly to move along the first direction Y. In practical applications, the interval between the glue suction part 21 and the first glue suction part 10 can change along the first direction X, and the variable-distance glue suction assembly can move along the first direction Y as a whole. And the first direction X and the first direction Y are perpendicular to each other. It can be understood that the variable-distance glue suction assembly can move along the first direction Y to take glue, and at the same time, the glue suction part 21 can move along the first direction X to make the non-adhesive part 52 redundant, thereby achieving glue sticking to the battery body 1.

[0046] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A battery cell, characterized in that: It comprises an insulating member (50), a battery cell body (1) and a connecting sheet, wherein the insulating member (50) is adhered to the battery cell body (1), and the connecting sheet is welded to the tab (2) of the battery cell body; The insulating member (50) comprises a first adhesive portion (51a), a second adhesive portion (51b) and a non-adhesive portion (52), wherein the first adhesive portion (51a) and the second adhesive portion (51b) are arranged on both sides of the non-adhesive portion (52) along the width direction of the insulating member (50); The non-adhesive portion (52) covers the tab (2) of the battery cell body (1), one of the first adhesive portion (51a) and the second adhesive portion (51b) is adhered to the battery cell body (1), and the other of the first adhesive portion (51a) and the second adhesive portion (51b) is adhered to the connecting sheet; The distance between the connecting sheet and the battery cell body (1) along the vertical direction is h, and the width of the non-adhesive portion (52) along the width direction of the insulating member (50) is a, wherein a>h.

2. The battery cell according to claim 1, characterized in that: The width of the insulating member (50) is A, and the widths of the first adhesive portion (51a) and the second adhesive portion (51b) along the width direction of the insulating member (50) are both b, wherein 20%A≤a≤70%A, 15%A≤b≤40%A, and 3mm≤ah≤5mm.

3. A gluing mechanism, used for gluing the insulating member (50) according to any one of claims 1 to 2 to the battery cell body (1), characterized in that: The invention comprises a variable-distance glue-absorbing component, wherein the variable-distance glue-absorbing component comprises a main body, a first glue-absorbing component (10) and a second glue-absorbing component (20), wherein the first glue-absorbing component (10) and the second glue-absorbing component (20) are both connected to the main body, and at least one of the first glue-absorbing component (10) and the second glue-absorbing component (20) is movably connected to the main body, and the second glue-absorbing component (20) and / or the first glue-absorbing component (10) can move along a first direction (X) so as to increase or decrease the interval between the second glue-absorbing component (20) and the first glue-absorbing component (10); The first adhesive absorbing component (10) and the second adhesive absorbing component (20) absorb the first adhesive portion (51a) and the second adhesive portion (51b) respectively, and when the distance between the second adhesive absorbing component (20) and the first adhesive absorbing component (10) is reduced, the non-adhesive portion (52) is bent toward the main body in an arch shape.

4. The glue sticking mechanism according to claim 3, characterized in that: The main body comprises a bracket (30), and the second glue absorbing member (20) comprises a glue absorbing portion (21) and a driving portion (22); The first glue absorbing component (10) is fixedly connected to the bracket (30), the driving part (22) is fixedly connected to the bracket (30), the glue absorbing part (21) is connected to the driving part (22), and the driving part (22) is used to drive the glue absorbing part (21) to move along the first direction (X) relative to the first glue absorbing component (10), so as to increase or decrease the interval between the glue absorbing part (21) and the first glue absorbing component (10).

5. The glue sticking mechanism according to claim 4, characterized in that: The variation of the interval between the adhesive absorbing portion (21) and the first adhesive absorbing member (10) along the first direction (X) is L, wherein 3 mm ≤ L ≤ 5 mm.

6. The glue sticking mechanism according to claim 4, characterized in that: A first adsorption hole group (211) is provided at one end of the adhesive suction portion (21) away from the bracket (30), and a plurality of second adsorption hole groups (11) are provided at one end of the first adhesive suction member (10) away from the bracket (30), and both the first adsorption hole group (211) and the second adsorption hole group (11) are connected to an external negative pressure adsorption device; The first adsorption hole group (211) is adsorbed to one of the first adhesive portion (51a) and the second adhesive portion (51b), and the second adsorption hole group (11) is adsorbed to the other of the first adhesive portion (51a) and the second adhesive portion (51b).

7. The adhesive laminating mechanism according to claim 6, characterized in that: The first adsorption hole group (211) comprises a plurality of first adsorption holes (2111), and the plurality of first adsorption holes (2111) are arranged in an array; The second adsorption hole group (11) comprises a plurality of second adsorption holes (111), and the plurality of second adsorption holes (111) are arranged in an array.

8. The glue sticking mechanism according to claim 4, characterized in that: The second glue suction component (20) further comprises a slide rail and a slider (23), wherein the slide rail and the slider (23) are slidably connected, the slider (23) and the glue suction part (21) are fixedly connected, the driving part (22) is connected to the slider (23), the slide rail extends along the first direction (X), and the driving part (22) drives the slider (23) to slide along the slide rail.

9. The glue sticking mechanism according to claim 8, characterized in that: The slide rail comprises at least two slide rail parts, the two slide rail parts are parallel to each other, and the two slide rail parts are both slidably connected to the slide rail.

10. The glue sticking mechanism according to any one of claims 3 to 9, characterized in that: Also includes: A driving member (40); The driving member (40) is connected to the variable-distance glue suction component, and the driving member (40) is used to drive the variable-distance glue suction component to move along the second direction (Y); The first direction (X) and the second direction (Y) are perpendicular.

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