Gluing head, gluing device and battery gluing system

Abstract

The utility model provides a gluing head, a gluing device and a battery gluing system, and belongs to the technical field of gluing and batteries. The gluing head comprises a gluing nozzle, and the gluing nozzle is provided with a first glue storage cavity, a glue inlet and a glue outlet, wherein the glue inlet and the glue outlet are communicated with the first glue storage cavity. The glue outlet extends in the first direction and comprises a first sub-glue outlet and a second sub-glue outlet, and the first sub-glue outlet and the second sub-glue outlet are arranged in the first direction. And in the second direction, the height of the first sub-glue outlet is smaller than that of the second sub-glue outlet, the second direction is the height direction of the first glue storage cavity, and the second direction intersects with the first direction. The thickness of the glue layers in different areas of the bottom of the battery box body can be different through one-time gluing, glue waste can be reduced, meanwhile, the energy density of the battery can be increased, the gluing procedure is simple, and the working efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gluing and batteries, and in particular to a gluing head, a gluing device and a battery gluing system. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the production of batteries, glue is needed to achieve bonding between different parts, for example, bonding the battery cells to the bottom of the battery case. However, different areas of the battery case require different glue layer thicknesses. The gluing device in the related art can only apply glue layers of the same thickness, but not different thicknesses, and is not suitable for gluing battery cases. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a glue coating head, a glue coating device and a battery glue coating system, which can be applied to the glue coating scene of the battery box.

[0005] An embodiment of the first aspect of the present application provides a glue coating head, which includes: a glue coating nozzle, having a first glue storage cavity, and a glue inlet and a glue outlet respectively connected to the first glue storage cavity; wherein the glue outlet extends along a first direction X, the glue outlet includes a first sub-glue outlet and a second sub-glue outlet, the first sub-glue outlet and the second sub-glue outlet are arranged along the first direction X, along the second direction Y, the height H1 of the first sub-glue outlet is less than the height H2 of the second sub-glue outlet, the second direction Y is the height direction of the first glue storage cavity, and the second direction Y intersects with the first direction X.

[0006] In the technical solution of the embodiment of the present application, glue flows from the glue inlet to the first glue storage cavity, and the glue is discharged from the first sub-glue outlet and the second sub-glue outlet respectively. Since the height H1 of the first sub-glue outlet is less than the height H2 of the second sub-glue outlet, the amount of glue discharged from the first sub-glue outlet is less than the amount of glue discharged from the second sub-glue outlet, and the thickness of the formed glue layer is different. When the glue coating head is used to coat the battery case with glue, the first sub-glue outlet can be made to correspond to the area at the bottom of the battery case where the battery cell does not need to be bonded, and the second sub-glue outlet can be made to correspond to the area at the bottom of the battery case where the battery cell needs to be bonded. The thickness of the glue layer in different areas of the bottom of the battery case can be made different by coating glue once, which can reduce the waste of glue and increase the energy density of the battery at the same time. The gluing process is simple and the work efficiency is improved.

[0007] In some embodiments, the glue coating head further includes: an adjustment sheet, which is located in the first glue storage cavity, the adjustment sheet is connected to the glue coating nozzle, and the side of the adjustment sheet coincides with the side of the first sub-glue outlet extending along the first direction X, so that the height H1 of the first sub-glue outlet is less than the height H2 of the second sub-glue outlet. The adjustment sheet is placed at a position corresponding to the first sub-glue outlet, and the adjustment sheet can block the flow of glue, so that the amount of glue discharged from the first sub-glue outlet is less. At the same time, the side of the adjustment sheet coincides with the side of the first sub-glue outlet extending along the first direction X, and the adjustment sheet covers a part of the opening of the first glue storage cavity, thereby adjusting the height of the first sub-glue outlet, so that the height H1 of the first sub-glue outlet is less than the height H2 of the second sub-glue outlet, which is more convenient.

[0008] In some embodiments, the glue coating head further includes: a diverter sheet, which is located in the first glue storage cavity, the diverter sheet is connected to the glue coating nozzle, the first glue storage cavity is divided into a first sub-glue storage cavity and a second sub-glue storage cavity by the diverter sheet, the first sub-glue storage cavity and the second sub-glue storage cavity are both connected to the glue inlet, the first sub-glue storage cavity is connected to the first sub-glue outlet, and the second sub-glue storage cavity is connected to the second sub-glue outlet. The first glue storage cavity is divided into the first sub-glue storage cavity and the second sub-glue storage cavity by the diverter sheet, a part of the glue is discharged from the first sub-glue outlet through the first sub-glue storage cavity, and the other part of the glue is discharged from the second sub-glue outlet through the second sub-glue storage cavity, so that the glue has been separated in the first glue storage cavity, which is more convenient for glue discharge.

[0009] In some embodiments, the shunt sheet has a bent portion at one end close to the glue inlet, and the bent portion bends toward the second sub-glue storage cavity. By providing the bent portion on the shunt sheet, and the bent portion bends toward the second sub-glue storage cavity, the opening corresponding to the first sub-glue storage cavity is enlarged, the amount of glue flowing into the first sub-glue storage cavity is increased, the glue is more easily discharged at the same time, the glue applied is more uniform, and the waste of glue is reduced.

[0010] In some embodiments, the height H1 of the first sub-gluing outlet and the height H2 of the second sub-gluing outlet satisfy: 3≤H2 / H1≤9. When the glue coating head provided in the embodiment of the present application is used for gluing the bottom of the battery case, the ratio of the height H1 of the first sub-gluing outlet and the height H2 of the second sub-gluing outlet is set according to the ratio of the glue layer thickness in different areas, so that the glue output of the first sub-gluing outlet and the glue output of the second sub-gluing outlet can better meet the glue coating requirements of the bottom of the battery case.

[0011] In some embodiments, the glue outlet includes two first sub-glue outlets, and the second sub-glue outlet is located between the two first sub-glue outlets along the first direction X. When applying glue to the bottom of the battery box, the middle area of ​​the bottom of the battery box is where the battery cells are arranged, and a thicker glue layer needs to be arranged; the two side areas of the bottom of the battery box are not where the battery cells are arranged, and a thinner glue layer needs to be arranged. The second sub-glue outlet and the first sub-glue outlet are arranged according to the distribution of the glue layer in the bottom of the battery box, so that the gluing requirements of the bottom of the battery box can be met by applying glue once, and the work efficiency is higher.

[0012] In some embodiments, the glue coating head further includes: a glue coating tube having a second glue storage cavity, and an inlet and an outlet communicated with the second glue storage cavity, wherein the outlet is communicated with the glue inlet. By providing the glue coating tube, the glue coating head can be connected to other components through the glue coating tube, thereby facilitating the connection of the glue coating head.

[0013] In some embodiments, the outer side wall of the glue coating tube near the inlet has a mounting thread. The mounting thread is arranged on the glue coating tube, and the glue coating head can be connected with other components through threaded connection, which is convenient for installation and disassembly.

[0014] In some embodiments, along the first direction X, the ratio of the length L1 of the first sub-gluing outlet to the length L2 of the second sub-gluing outlet satisfies: 3≤L2 / L1≤9. When the glue coating head provided in the embodiments of the present application is applied to the bottom of the battery case, for the glue coated on the bottom of the battery case, the area with a thicker glue layer is larger than the area with a thinner glue layer. The ratio of the length L1 of the first sub-gluing outlet to the length L2 of the second sub-gluing outlet is set according to the size ratio of different areas, so that the area with a thicker glue layer and the area with a thinner glue layer can better meet the gluing requirements of the bottom of the battery case.

[0015] An embodiment of the second aspect of the present application provides a gluing device, which includes the gluing head in the above embodiment.

[0016] An embodiment of the third aspect of the present application provides a battery gluing system, the battery gluing system includes the gluing device in the above embodiment, and the gluing device is used to glue the battery box.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0019] Figure 1 This is a schematic diagram of the structure of the glue coating head of some embodiments of the present application;

[0020] Figure 2 A right side view of a glue coating head according to some embodiments of the present application;

[0021] Figure 3 for Figure 2 Cross-section view of the AA surface;

[0022] Figure 4 A bottom view of a glue coating head according to some embodiments of the present application;

[0023] Figure 5 for Figure 1 Axonometric view of the glue coating head along the BB surface;

[0024] Figure 6 for Figure 1 Axonometric view of the glue coating head along the CC plane;

[0025] Figure 7 for Figure 6 Bottom view of the axonometric view shown;

[0026] Figure 8 This is a front view of a glue coating head according to some embodiments of the present application;

[0027] Fig. 9 for Figure 8 Cross-sectional view of the middle DD plane.

[0028] Description of reference numerals:

[0029] 10. Glue coating nozzle; 11. First glue storage cavity; 111. First sub-glue storage cavity; 112. Second sub-glue storage cavity; 12. Glue inlet; 13. Glue outlet; 131. First sub-glue outlet; 132. Second sub-glue outlet; 20. Adjustment plate; 30. Diverter plate; 31. Bending portion; 40. Glue coating tube; 41. Second glue storage cavity; 42. Inlet; 43. Outlet; 44. Mounting thread. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0039] During the production of batteries, glue is needed to bond different parts, such as bonding battery cells to the bottom of the battery case. A glue coating device is used to coat the bottom of the battery case with a glue layer, where the area where the bottom of the battery case is bonded to the battery cells needs to be coated with a thicker glue layer to achieve effective bonding between the battery cells and the battery case; the area at the bottom of the battery case where the battery cells are not bonded needs to be coated with a thinner glue layer to achieve insulation effect through the glue layer, while preventing the glue layer from being too thick to affect the energy density of the battery.

[0040] In the related art, a glue coating device is generally used to coat the bottom of the battery case with a glue layer, but the thickness of the glue layer coated by the glue coating device is the same. In order to ensure effective bonding between the battery cell and the battery case, a thicker glue layer is coated on the bottom of the battery case, making the glue layer thicker in the area of ​​the bottom of the battery case that does not need to bond the battery cell, which affects the energy density of the battery and also causes glue waste. If the glue layer is coated on the bottom of the battery case twice, the process is cumbersome and the work efficiency is low.

[0041] An embodiment of the present application provides a glue coating head, which includes a glue coating nozzle, and the glue coating nozzle has a first glue storage cavity, and a glue inlet and a glue outlet respectively connected to the first glue storage cavity. Among them, the glue outlet extends along the first direction, and the glue outlet includes a first sub-glue outlet and a second sub-glue outlet, and the first sub-glue outlet and the second sub-glue outlet are arranged along the first direction. Along the second direction, the height of the first sub-glue outlet is less than the height of the second sub-glue outlet, and the second direction is the height direction of the first glue storage cavity, and the second direction intersects with the first direction. When the glue coating head is used to apply glue to the battery case, the first sub-glue outlet can be opposite to the area at the bottom of the battery case where the battery cell does not need to be bonded, and the second sub-glue outlet can be opposite to the area at the bottom of the battery case where the battery cell needs to be bonded. The thickness of the glue layer in different areas of the bottom of the battery case can be different by applying glue once, which can reduce the waste of glue and increase the energy density of the battery at the same time. The gluing process is simple and the work efficiency is improved.

[0042] The gluing head and the gluing device disclosed in the embodiments of the present application can be used for gluing work in the battery production process, and can be used for other gluing work.

[0043] The embodiment of the present application provides a glue coating head, Figure 1 This is a schematic diagram of the structure of the glue coating head in some embodiments of the present application. Figure 1 The glue coating head includes a glue coating nozzle 10. Figure 2 This is a right side view of the glue coating head of some embodiments of the present application. Figure 3 for Figure 2 Cross-section of the AA surface. Figures 1 to 3 The glue coating nozzle 10 has a first glue storage cavity 11, and a glue inlet 12 and a glue outlet 13 respectively connected to the first glue storage cavity 11. The glue outlet 13 extends along the first direction X, and the glue outlet 13 includes a first sub-glue outlet 131 and a second sub-glue outlet 132, and the first sub-glue outlet 131 and the second sub-glue outlet 132 are arranged along the first direction X.

[0044] Figure 4 The bottom view of the glue coating head of some embodiments of the present application. Along the second direction Y, the height H1 of the first glue outlet 131 is less than the height H2 of the second glue outlet 132, and the second direction Y is the height direction of the first glue storage cavity 11, and the second direction Y intersects with the first direction X.

[0045] In an embodiment of the present application, the glue inlet 12 and the glue outlet 13 are both connected to the first glue storage cavity 11 , so that the glue can flow from the glue inlet 12 into the first glue storage cavity 11 and be discharged from the glue outlet 13 .

[0046] The glue nozzle 10 is the part at the front end of the glue coating head for discharging glue. During the movement of the glue nozzle 10, the glue outlet 13 continuously discharges glue to form a glue layer. Generally, the general shape of the glue outlet 13 is a long strip, so that the glue discharged from the glue outlet 13 is distributed over a wider area, and the glue nozzle 10 can be coated to form a larger area of ​​glue layer. The width of the glue layer is equal to the length of the glue outlet 13, and the length of the glue layer is equal to the distance the glue nozzle 10 moves. In the embodiment of the present application, the length direction of the glue outlet 13 is parallel to the first direction X, and the length direction of the first sub-glue outlet 131 and the length direction of the second sub-glue outlet 132 are both parallel to the first direction X.

[0047] In the embodiment of the present application, the sizes of the glue inlet 12 along multiple directions are similar, such as circular or square, so that the glue can flow into the glue inlet 12 more concentratedly.

[0048] In the embodiment of the present application, the shape of the first glue storage cavity 11 can be set according to the requirements, for example, Figure 3 As shown, the first glue storage cavity 11 may be a flat trapezoidal structure, such that the top edge of the trapezoidal structure is opposite to the glue inlet 12 , and the bottom edge of the trapezoidal structure is opposite to the glue outlet 13 .

[0049] In an embodiment of the present application, the second direction Y is the height direction of the first glue storage cavity 11 . When the bottom surface of the first glue storage cavity 11 is a plane, the second direction Y is perpendicular to the bottom surface of the first glue storage cavity 11 .

[0050] In one implementation of the embodiment of the present application, the second direction Y is perpendicular to the first direction X. In other implementations, the angle between the second direction Y and the first direction X may be less than 90 degrees.

[0051] In an embodiment of the present application, glue flows from the glue inlet 12 into the first glue storage cavity 11, and the glue is discharged from the first sub-glue outlet 131 and the second sub-glue outlet 132 respectively. Since the height H1 of the first sub-glue outlet 131 is smaller than the height H2 of the second sub-glue outlet 132, the amount of glue discharged from the first sub-glue outlet 131 is less than the amount of glue discharged from the second sub-glue outlet 132, and the thickness of the formed glue layer is different.

[0052] When the glue coating head is used to coat the battery case with glue, the first sub-glue outlet 131 can be arranged opposite to the area on the bottom of the battery case where the battery cell does not need to be bonded, and the second sub-glue outlet 132 can be arranged opposite to the area on the bottom of the battery case where the battery cell needs to be bonded. The thickness of the glue layer in different areas of the bottom of the battery case can be made different by coating the glue once, which can reduce the waste of glue and increase the energy density of the battery. The gluing process is simple and the work efficiency is improved.

[0053] According to some embodiments of the present application, see Figure 4The glue coating head further includes an adjusting piece 20. The adjusting piece 20 is located in the first glue storage cavity 11, connected to the glue coating nozzle 10, and the side of the adjusting piece 20 coincides with the side of the first glue sub-outlet 131 extending along the first direction X, so that the height H1 of the first glue sub-outlet 131 is less than the height H2 of the second glue sub-outlet 132.

[0054] In some embodiments of the present application, the adjusting piece 20 can be connected to the glue applying nozzle 10 by bonding or welding. In other embodiments of the present application, the adjusting piece 20 and the glue applying nozzle 10 can be integrally formed.

[0055] In an embodiment of the present application, the adjustment plate 20 can be only arranged at the end close to the first sub-glue outlet 131, so that the adjustment plate 20 occupies less space in the first glue storage cavity 11, reducing the impact on the volume of the first glue storage cavity 11, so that the first glue storage cavity 11 can store more glue.

[0056] In the embodiment of the present application, an adjustment sheet 20 is placed at a position corresponding to the first sub-glue outlet 131, and the adjustment sheet 20 can block the flow of glue, so that the amount of glue discharged from the first sub-glue outlet 131 is small. At the same time, the side of the adjustment sheet 20 coincides with the side of the first sub-glue outlet 131 extending along the first direction X, and the adjustment sheet 20 covers a part of the opening of the first glue storage cavity 11, thereby adjusting the height of the first sub-glue outlet 131, so that the height H1 of the first sub-glue outlet 131 is less than the height H2 of the second sub-glue outlet 132, which is more convenient.

[0057] See also Figure 4 , the two sides of the first sub-glue outlet 131 arranged along the second direction Y can be provided with adjustment pieces 20.

[0058] In other implementations of the present application, the shape of the first glue storage cavity 11 can be directly changed so that the height of the corresponding portion between the first glue storage cavity 11 and the first glue sub-outlet 131 is lower than the height of the corresponding portion between the first glue storage cavity 11 and the second glue sub-outlet 132 .

[0059] According to some embodiments of the present application, Figure 5 for Figure 1 Axonometric view of the glue coating head along the BB surface. Figure 6 for Figure 1 Axonometric view of the glue coating head along the CC plane. Figure 7 for Figure 6 Axonometric view from below. Figures 3 to 7The glue coating head further includes a shunt sheet 30. The shunt sheet 30 is located in the first glue storage cavity 11, and the shunt sheet 30 is connected to the glue coating nozzle 10. The first glue storage cavity 11 is divided into a first sub-glue storage cavity 111 and a second sub-glue storage cavity 112 by the shunt sheet 30. The first sub-glue storage cavity 111 and the second sub-glue storage cavity 112 are both connected to the glue inlet 12, the first sub-glue storage cavity 111 is connected to the first sub-glue outlet 131, and the second sub-glue storage cavity 112 is connected to the second sub-glue outlet 132.

[0060] In an embodiment of the present application, the glue flows from the glue inlet 12 to the first glue storage cavity 11, and flows to the first sub-glue storage cavity 111 and the second sub-glue storage cavity 112 respectively. The glue flowing into the first sub-glue storage cavity 111 is discharged from the first sub-glue outlet 131, and the glue flowing into the second sub-glue storage cavity 112 is discharged from the second sub-glue outlet 132.

[0061] In the embodiment of the present application, along the second direction Y, the height of the diverter plate 30 is equal to the height of the first glue storage cavity 11 .

[0062] In an embodiment of the present application, the first glue storage cavity 11 is divided into a first sub-glue storage cavity 111 and a second sub-glue storage cavity 112 by a diverter plate 30. A portion of the glue is discharged from the first sub-glue outlet 131 through the first sub-glue storage cavity 111, and another portion of the glue is discharged from the second sub-glue outlet 132 through the second sub-glue storage cavity 112. The glue is separated in the first glue storage cavity 11, making it easier to discharge the glue.

[0063] See also Figure 4 The diverter sheet 30 separates the first sub-glue outlet 131 from the second sub-glue outlet 132 . In other implementations, the first sub-glue outlet 131 and the second sub-glue outlet 132 may be connected, that is, the diverter sheet 30 does not extend to the glue outlet 13 .

[0064] According to some embodiments of the present application, see Figure 3 The end of the diverter sheet 30 close to the glue inlet 12 has a bending portion 31 , and the bending portion 31 is bent toward the second sub-glue storage cavity 112 .

[0065] In the embodiment of the present application, in order to allow the glue to flow more concentratedly into the glue inlet 12, the first glue storage cavity 11 is a flat trapezoidal structure, the top edge of the trapezoidal structure is opposite to the glue inlet 12, the bottom edge of the trapezoidal structure is opposite to the glue outlet 13, and the first sub-glue outlet 131 is close to the waist of the bottom edge of the trapezoidal structure, the glue is more likely to flow to the second sub-glue outlet 132, that is, the second sub-glue storage cavity 112 is more likely to be filled with glue, and after the second sub-glue storage cavity 112 is filled first, the first sub-glue storage cavity 111 is filled with glue, that is, the glue will be discharged from the second sub-glue outlet 132 first, and then discharged from the first sub-glue outlet 131. The glue cannot be discharged at the same time. If the glue discharged first is coated, the glue coating will be uneven. If the glue discharged first is not coated, it will cause glue waste.

[0066] In the embodiment of the present application, a bending portion 31 is provided on the diverter plate 30, and the bending portion 31 is bent toward the second sub-glue storage cavity 112, so that the opening corresponding to the first sub-glue storage cavity 111 is enlarged, and the amount of glue flowing into the first sub-glue storage cavity 111 is increased, the glue is more easily discharged at the same time, the coated glue is more evenly applied, and the waste of glue is reduced.

[0067] According to some embodiments of the present application, a height H1 of the first sub-glue outlet 131 and a height H2 of the second sub-glue outlet 132 satisfy: 3≤H2 / H1≤9.

[0068] Exemplarily, H2 / H1=5.

[0069] When the glue coating head provided in the embodiment of the present application is used for gluing the bottom of the battery case, the ratio of the height H1 of the first sub-glue outlet 131 to the height H2 of the second sub-glue outlet 132 is set according to the ratio of the glue layer thickness in different areas, so that the glue output of the first sub-glue outlet 131 and the glue output of the second sub-glue outlet 132 can better meet the gluing requirements at the bottom of the battery case.

[0070] According to some embodiments of the present application, see Figure 1 , Figure 3 and Figure 4 The glue coating nozzle 10 has two first sub-glue outlets 131 , and along the first direction X, the second sub-glue outlet 132 is located between the two first sub-glue outlets 131 .

[0071] When applying glue to the bottom of the battery box, the middle area of ​​the bottom of the battery box is where the battery cells are arranged, and a thicker glue layer needs to be arranged; the two side areas of the bottom of the battery box are not where the battery cells are arranged, and a thinner glue layer needs to be arranged. The second sub-glue outlet 132 and the first sub-glue outlet 131 are arranged according to the distribution of the glue layer in the bottom of the battery box, so that the gluing requirements of the bottom of the battery box can be met by applying glue once, and the work efficiency is higher.

[0072] According to some embodiments of the present application, Figure 8 This is a front view of the glue coating head of some embodiments of the present application. Figure 8 The glue coating head also includes a glue coating tube 40, Fig. 9 for Figure 8 Cross-sectional view of the middle DD surface. Figure 3 , Figure 8 and Fig. 9 The glue coating tube 40 has a second glue storage cavity 41 , and an inlet 42 and an outlet 43 connected to the second glue storage cavity 41 , and the outlet 43 is connected to the glue inlet 12 .

[0073] In the embodiment of the present application, the glue coating tube 40 extends along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0074] The outlet 43 is connected to the glue inlet 12 , so the outlet 43 and the glue inlet 12 point to the same position.

[0075] In the embodiment of the present application, both the inlet 42 and the outlet 43 are connected to the second glue storage cavity 41 , so that the glue can flow from the inlet 42 into the second glue storage cavity 41 and flow into the glue inlet 12 through the outlet 43 .

[0076] In the embodiment of the present application, by providing a glue coating tube 40, the glue coating head can be connected to other components through the glue coating tube 40, which facilitates the connection of the glue coating head.

[0077] According to some embodiments of the present application, see Figures 1 to 3 , Figure 7 and Figure 8 The outer side wall of the glue coating tube 40 near the inlet 42 has a mounting thread 44 .

[0078] In the embodiment of the present application, a mounting thread is provided on the glue coating tube 40, and the glue coating head can be connected to other components through threaded connection, so as to facilitate installation and disassembly.

[0079] According to other embodiments of the present application, the glue coating tube 40 can be connected to other components by welding.

[0080] According to some embodiments of the present application, along the first direction X, a ratio of a length L1 of the first sub-glue outlet 131 to a length L2 of the second sub-glue outlet 132 satisfies: 3≤L2 / L1≤9.

[0081] For example, L2 / L1=6

[0082] When the glue coating head provided in the embodiment of the present application is used to coat glue on the bottom of the battery case, for the glue coated on the bottom of the battery case, the area with a thicker glue layer is larger than the area with a thinner glue layer. The ratio of the length L1 of the first sub-glue outlet 131 to the length L2 of the second sub-glue outlet 132 is set according to the size ratio of different areas, so that the area with a thicker glue layer and the area with a thinner glue layer can better meet the gluing requirements of the bottom of the battery case.

[0083] An embodiment of the present application provides a gluing device, which includes a gluing head as described in any one of the above embodiments.

[0084] The gluing device provided in the embodiment of the present application can make the thickness of the glue layer in different areas of the bottom of the battery box different by gluing once, which can reduce the waste of glue and increase the energy density of the battery. The gluing process is simple and the work efficiency is improved.

[0085] An embodiment of the present application provides a battery gluing system, which includes a gluing device as in the above embodiment, and the gluing device is used to glue the battery box.

[0086] The battery gluing system provided in the embodiment of the present application can make the thickness of the glue layer in different areas of the bottom of the battery box different through one-time gluing, which can reduce the waste of glue and increase the energy density of the battery. The gluing process is simple and the work efficiency is improved.

[0087] The embodiment of the present application provides a glue coating head, which includes a glue coating nozzle 10, an adjustment plate 20, a diverter plate 30 and a glue coating tube 40. The glue coating nozzle 10 has a first glue storage cavity 11, and a glue inlet 12 and a glue outlet 13 respectively connected to the first glue storage cavity 11. Among them, the glue outlet 13 extends along the first direction X, and the glue outlet 13 includes a first sub-glue outlet 131 and a second sub-glue outlet 132, and the first sub-glue outlet 131 and the second sub-glue outlet 132 are arranged along the first direction X. Along the second direction Y, the height H1 of the first sub-glue outlet 131 is less than the height H2 of the second sub-glue outlet 132, and the second direction Y is the height direction of the first glue storage cavity 11, and the second direction Y intersects with the first direction X. The glue outlet 13 includes two first sub-glue outlets 131, and along the first direction X, the second sub-glue outlet 132 is located between the two first sub-glue outlets 131.

[0088] The adjusting plate 20 is located in the first glue storage cavity 11, connected to the glue nozzle 10, and the side of the adjusting plate 20 coincides with the side of the first sub-glue outlet 131 extending along the first direction X, so that the height H1 of the first sub-glue outlet 131 is smaller than the height H2 of the second sub-glue outlet 132.

[0089] The diverter sheet 30 is located in the first glue storage cavity 11, and the diverter sheet 30 is connected to the glue coating nozzle 10. The first glue storage cavity 11 is divided into a first sub-glue storage cavity 111 and a second sub-glue storage cavity 112 by the diverter sheet 30. The first sub-glue storage cavity 111 and the second sub-glue storage cavity 112 are both connected to the glue inlet 12. The first sub-glue storage cavity 111 is connected to the first sub-glue outlet 131, and the second sub-glue storage cavity 112 is connected to the second sub-glue outlet 132. The diverter sheet 30 has a bending portion 31 at one end close to the glue inlet 12, and the bending portion 31 is bent toward the second sub-glue storage cavity 112.

[0090] The glue coating tube 40 has a second glue storage cavity 41, and an inlet 42 and an outlet 43 connected to the second glue storage cavity 41, and the outlet 43 is connected to the glue inlet 12. The outer wall of the glue coating tube 40 near the inlet 42 has a mounting thread 44.

[0091] The height H1 of the first sub-glue outlet 131 and the height H2 of the second sub-glue outlet 132 satisfy: 3≤H2 / H1≤9. Along the first direction X, the ratio of the length L1 of the first sub-glue outlet 131 to the length L2 of the second sub-glue outlet 132 satisfies: 3≤L2 / L1≤9.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A glue coating head, characterized in that: The glue coating head comprises: A glue coating nozzle (10) having a first glue storage cavity (11), and a glue inlet (12) and a glue outlet (13) respectively connected to the first glue storage cavity (11); The glue outlet (13) extends along a first direction X, the glue outlet (13) comprises a first sub-glue outlet (131) and a second sub-glue outlet (132), the first sub-glue outlet (131) and the second sub-glue outlet (132) are arranged along the first direction X, along a second direction Y, a height H1 of the first sub-glue outlet (131) is smaller than a height H2 of the second sub-glue outlet (132), the second direction Y is a height direction of the first glue storage cavity (11), and the second direction Y intersects with the first direction X.

2. The glue coating head according to claim 1, characterized in that: The glue coating head also includes: An adjusting plate (20) is located in the first glue storage cavity (11), the adjusting plate (20) is connected to the glue coating nozzle (10), and a side edge of the adjusting plate (20) coincides with a side edge of the first glue sub-outlet (131) extending along the first direction X, so that a height H1 of the first glue sub-outlet (131) is smaller than a height H2 of the second glue sub-outlet (132).

3. The glue coating head according to claim 1, characterized in that: The glue coating head also includes: A flow divider (30) is located in the first glue storage cavity (11), the flow divider (30) is connected to the glue coating nozzle (10), the first glue storage cavity (11) is divided into a first sub-glue storage cavity (111) and a second sub-glue storage cavity (112) by the flow divider (30), the first sub-glue storage cavity (111) and the second sub-glue storage cavity (112) are both connected to the glue inlet (12), the first sub-glue storage cavity (111) is connected to the first sub-glue outlet (131), and the second sub-glue storage cavity (112) is connected to the second sub-glue outlet (132).

4. The glue coating head according to claim 3, characterized in that: One end of the diverter sheet (30) close to the glue inlet (12) has a bending portion (31), and the bending portion (31) is bent toward the second sub-glue storage cavity (112).

5. The glue coating head according to any one of claims 1 to 4, characterized in that: A height H1 of the first sub-glue outlet (131) and a height H2 of the second sub-glue outlet (132) satisfy: 3≤H2 / H1≤9.

6. The glue coating head according to any one of claims 1 to 4, characterized in that: The glue outlet (13) comprises two first sub-glue outlets (131), and along the first direction X, the second sub-glue outlet (132) is located between the two first sub-glue outlets (131).

7. The glue coating head according to any one of claims 1 to 4, characterized in that: The glue coating head also includes: The glue coating tube (40) comprises a second glue storage cavity (41), and an inlet (42) and an outlet (43) communicated with the second glue storage cavity (41), wherein the outlet (43) is communicated with the glue inlet (12).

8. The glue coating head according to claim 7, characterized in that: The outer side wall of the glue coating tube (40) close to the inlet (42) is provided with a mounting thread (44).

9. The glue coating head according to any one of claims 1 to 4, characterized in that: Along the first direction X, the ratio of the length L1 of the first sub-glue outlet (131) to the length L2 of the second sub-glue outlet (132) satisfies: 3≤L2 / L1≤9.

10. A glue coating device, characterized in that: The gluing device comprises a gluing head as claimed in any one of claims 1 to 9.

11. A battery glue coating system, characterized in that: The battery gluing system comprises a gluing device as described in claim 10, and the gluing device is used to apply glue to the battery box.

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