Hot melting head

Abstract

The utility model belongs to the technical field of batteries, and discloses a hot melting head which comprises a base, a heating tube, a hot melting block and a temperature detection piece, wherein the heating tube is inserted into the base, and the heating tube can be electrically connected to an external power supply device so as to be used for heating the base; one part of the hot melting block is inserted into the base, and the other part of the hot melting block extends out of the base and is used for performing hot melting on a piece to be subjected to hot melting; the temperature detection piece is installed on the base and used for detecting the temperature of the base. According to the hot melting head, the hot melting mode that the base and the hot melting block are heated through the heating pipe is adopted for replacing the hot melting mode of a hot melting strip, so that the heated temperature of the hot melting block is uniform, the hot melting block is flat, the shape regularity of the hot melting point of a piece to be hot-melted is improved, the phenomena of virtual melting and over-melting are avoided, the hot melting strength and the hot melting effect are improved, and the hot melting efficiency is improved. The yield of the Mylar film coated on the battery is ensured; meanwhile, the temperature of the base is detected through the temperature detection piece, so that the hot melting temperature of the hot melting block is monitored and adjusted in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a hot melt head. Background Art

[0002] Mylar film is a polyester polymer film. During the battery assembly process, Mylar (polyester film) film is generally used to wrap the square shell battery cell group, and the Mylar film is hot-melt fixed to the plastic under the cover to prevent the battery cell group from being scratched during the shell insertion process, thereby protecting the battery cell group and insulating the battery cell group from the shell.

[0003] When hot-melting the Mylar film, defects such as irregular hot-melt point shape, virtual melting, and wire drawing often occur. The reason is that the hot-melt head in the industry currently uses a hot-melt strip as a heat source and hot-melt component to hot-melt the hot-melt parts, and the hot-melt strip is a metal sheet. During the hot-melt process, the metal sheet is easily deformed after being electrically heated, making it difficult for the hot-melt strip to fit tightly with the hot-melt head base, resulting in an irregular hot-melt point shape or virtual melting, affecting the hot-melt strength; furthermore, the heating principle of the hot-melt strip is instantaneous power-on heating, and its instantaneous temperature is high, and the temperature is difficult to control, resulting in the hot-melt point being prone to over-melting; and the Teflon tape attached to the outer surface of the hot-melt head base is easy to wear, resulting in the hot-melt point being prone to adhesion and wire drawing due to over-melting, which in turn easily leads to explosion points during the laser welding of the shell cover. The above defects will cause the yield rate of the battery cell coated with Mylar film to decrease.

[0004] Therefore, a hot melt head is urgently needed to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a hot melt head, which can avoid irregular hot melt point shape, virtual melting and over-melting, ensure hot melt strength, thereby improving the hot melt efficiency of Mylar film and the yield rate of battery coated Mylar film.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Hot melt head, including:

[0008] Pedestal;

[0009] A heating tube, the heating tube is inserted into the base, and the heating tube can be electrically connected to an external power supply device to heat the base;

[0010] A hot melt block, a part of which is inserted into the base and another part of which extends out of the base, so as to be used for hot melting the hot melt component;

[0011] A temperature detecting component is installed on the base and is used to detect the temperature of the base.

[0012] Optionally, the hot melt block comprises a fixed portion and a hot melt portion connected to each other, the fixed portion is detachable from the base, and at least a portion of the hot melt portion extends out of the base to be used for hot melting the hot melt component.

[0013] Optionally, the cross-sectional area of ​​the hot-melt portion is not greater than the cross-sectional area of ​​the fixing portion.

[0014] Optionally, two hot melt parts are provided, the two hot melt parts are respectively arranged on both sides of the fixing part, and the two hot melt parts are respectively extended from two opposite side walls of the base.

[0015] Optionally, it also includes a fixing pin, the base is provided with a fixing hole, the hot melt block is passed through the fixing hole, and the fixing pin is inserted into the fixing hole of the base and is limitedly connected to the hot melt block.

[0016] Optionally, the hot melt block is provided with a limiting through hole, and the fixing pin is passed through the limiting through hole.

[0017] Optionally, the heating tube and the temperature detecting element are both located close to the hot melt block.

[0018] Optionally, the insertion direction of the hot melt block and the insertion direction of the heating tube are perpendicular to each other, and the insertion direction of the hot melt block is the same as the installation direction of the temperature detection component.

[0019] Optionally, the base is provided with a first insertion hole and a second insertion hole, the extension directions of the first insertion hole and the second insertion hole are perpendicular to each other, the heating tube is inserted in the first insertion hole, and the hot melt block is inserted in the second insertion hole; along the extension direction of the second insertion hole, the base is provided with an installation hole, and the temperature detection component is installed in the installation hole.

[0020] Optionally, the outer surface of the above-mentioned hot melt block is coated with a high-temperature insulating coating.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a hot melt head, which uses a heating tube to heat the entire base, and then transmits the temperature to the hot melt block through the base, and the hot melt block is used to hot melt the hot melt part. This heating method uses the heating tube to replace the metal sheet hot melt strip as the heat source, instead of directly heating the hot melt block, so that the hot melt temperature of the hot melt block is more stable and controllable, the temperature distribution is more uniform, and over-melting and false melting phenomena can be avoided; and a block-shaped hot melt component (i.e., the hot melt block) is used to replace the metal sheet hot melt strip as the hot melt component, which can In order to avoid the problem that metal sheet hot melt strips are easily deformed after heating, the plane of the hot melt block is used as the working surface to make the hot melt point flat and regular, which can avoid irregular hot melt point or virtual melting caused by poor contact between the working surface and the Mylar film, improve the hot melt strength, improve the hot melt effect of the hot melt head, and ensure the yield rate of the battery coated with Mylar film; at the same time, the temperature detection component is used to detect the temperature of the base to realize real-time monitoring and adjustment of the hot melt temperature of the hot melt block, and avoid over-melting and virtual melting caused by the hot melt block temperature being too high or too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric diagram of a hot melt head provided in some embodiments of the utility model from one viewing angle;

[0024] Figure 2 It is an axonometric diagram of another perspective of the hot melt head provided in some embodiments of the utility model;

[0025] Figure 3 It is an axonometric diagram of a base provided by some embodiments of the present utility model from one viewing angle;

[0026] Figure 4 is an axonometric diagram of another perspective of a base provided by some embodiments of the utility model;

[0027] Figure 5 is an axonometric diagram of a hot melt block provided in some embodiments of the utility model;

[0028] Figure 6 It is an axonometric view of a fixing pin provided in some embodiments of the utility model.

[0029] In the figure:

[0030] 10. Base; 11. First insertion hole; 12. Second insertion hole; 13. Fixing hole; 14. Mounting hole; 15. Connection hole;

[0031] 20. Heating tube;

[0032] 30. hot melt block; 31. fixing portion; 311. limiting through hole; 32. hot melt portion;

[0033] 40. Fix the latch. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] Please refer to Figure 1 and Figure 2The present embodiment provides a hot melt head, which includes a base 10, a heating tube 20, a hot melt block 30 and a temperature detection component; wherein the heating tube 20 is inserted into the base 10, and the heating tube 20 can be electrically connected to an external power supply device for heating the base 10; a part of the hot melt block 30 is inserted into the base 10, and the other part extends out of the base 10, so as to perform hot melting on the hot melt component; the temperature detection component is installed on the base 10, and the temperature detection component is used to detect the temperature of the base 10, so as to realize real-time monitoring and adjustment of the hot melting temperature of the hot melt block 30, and avoid over-melting and false melting caused by the temperature of the hot melt block 30 being too high or too low.

[0039] The hot melt head in this embodiment is heated by using a heating tube 20, and the heating tube 20 heats the entire base 10, and then the temperature is transferred to the hot melt block 30 through the base 10, and the hot melt block 30 is used to hot melt the hot melt part. This heating method uses the heating tube 20 to replace the metal sheet hot melt strip as the heat source, and does not directly heat the hot melt component (that is, the hot melt block 30), so that the hot melt temperature of the hot melt component is more stable and controllable, and the temperature distribution is more uniform, which can avoid over-melting and false melting. And the block-shaped hot melt component (that is, the hot melt block 30) is used to replace the metal sheet hot melt strip as the heat source. As a hot-melt component, the problem of easy deformation of metal sheet hot-melt strips after heating can be avoided. The plane of the hot-melt block 30 is used as the working surface to make the hot-melt point flat and regular, which can avoid irregular hot-melt point or false melting caused by poor contact between the working surface and the Mylar film, ensure the hot-melt strength, improve the hot-melt effect of the hot-melt head, and ensure the yield rate of the battery coated with Mylar film; at the same time, the temperature detection component is used to detect the temperature of the base 10, so as to realize real-time monitoring and adjustment of the hot-melt temperature of the hot-melt block 30, and avoid over-melting and false melting caused by the temperature of the hot-melt block 30 being too high or too low.

[0040] Optionally, the heating tube 20 and the temperature detection element are both located close to the hot melt block 30 , which speeds up the heating tube 20 heating the hot melt block 30 and improves the accuracy of the temperature detection element in detecting the temperature of the hot melt block 30 .

[0041] Please refer to Figure 3 and Figure 4 In the present embodiment, the base 10 is a square structure, so that the hot melt head is more stable and flat, thereby making the hot melt block 30 and the heating tube 20 inserted therein flat.

[0042] Furthermore, the base 10 is provided with a first insertion hole 11 , and the heating tube 20 is inserted into the first insertion hole 11 , so that the heating tube 20 and the base 10 can be connected by insertion.

[0043] Furthermore, the base 10 is provided with a second insertion hole 12 , and the hot melt block 30 is inserted into the second insertion hole 12 , thereby realizing the insertion connection between the base 10 and the hot melt block 30 .

[0044] In some embodiments, the insertion direction of the hot melt block 30 and the insertion direction of the heating tube 20 are perpendicular to each other, so that the heating tube 20 will not be directed toward the side of the hot melt head to be hot-melted to the hot melt component, thereby avoiding the heating tube 20 affecting the hot melt block 30 on the hot melt of the hot melt component, thereby improving the hot melt effect of the hot melt head.

[0045] Furthermore, the insertion direction of the hot melt block 30 is the same as the installation direction of the temperature detection component, so that the temperature detection component is set close to the hot melt block 30 to detect the temperature of the hot melt block 30, avoiding the temperature detected by the temperature detection component being too different from the hot melt part of the hot melt block 30, thereby improving the accuracy of the temperature detection of the temperature detection component.

[0046] Specifically, the base 10 is provided with a first insertion hole 11 and a second insertion hole 12, and the extension directions of the first insertion hole 11 and the second insertion hole 12 are perpendicular to each other. The heating tube 20 is inserted into the first insertion hole 11, and the hot melt block 30 is inserted into the second insertion hole 12, so that the insertion direction of the hot melt block 30 and the insertion direction of the heating tube 20 are perpendicular to each other.

[0047] Furthermore, along the extension direction of the second insertion hole 12 , the base 10 is provided with a mounting hole 14 , and the temperature detection component is installed in the mounting hole 14 , so that the installation direction of the temperature detection component is the same as the insertion direction of the hot melt block 30 .

[0048] Furthermore, the base 10 is also provided with a connection hole 15, and the connection hole 15 is used for connecting and fixing the base 10 with an external structure, so that the base 10 can be fixedly connected with the fixed structure of the Mylar film coating hot melt equipment.

[0049] Specifically, four connection holes 15 are provided, and the four connection holes 15 are distributed at the bottom of the base 10 for fixed connection with the external fixing structure, thereby improving the stability of the connection between the hot melt head and the external fixing structure.

[0050] Please refer to Figure 1 , Figure 2 and Figure 5 In the present embodiment, the cross-sectional shape of the hot melt block 30 is a regular shape, so as to make the hot melt block 30 smooth and avoid irregularities in the shape of the hot melt point.

[0051] Exemplarily, the hot melt block 30 in this embodiment is a rectangular parallelepiped structure, that is, its cross-section is square, so that the hot melt head can be placed flat. Preferably, the hot melt block 30 is made of metal and has good thermal conductivity.

[0052] In some embodiments, the hot melt block 30 includes a fixed portion 31 and a hot melt portion 32 connected to each other. The fixed portion 31 is detachable from the base 10, and at least part of the hot melt portion 32 extends out of the base 10 for hot melting the hot melt component. The detachable connection between the fixed portion 31 and the base 10 also facilitates the subsequent replacement and maintenance of the hot melt block 30.

[0053] Optionally, the cross-sectional area of ​​the hot melt portion 32 is not greater than the cross-sectional area of ​​the fixing portion 31, that is, the fixing portion 31 is relatively large in size to facilitate fixing with the base 10, and the hot melt portion 32 extends out of the base 10 for hot melting, and does not need to be relatively large in size. Moreover, such an arrangement enables the fixing portion 31 to be smoothly inserted into the second insertion hole 12 during insertion and installation without being blocked by the hot melt portion 32, thereby facilitating the installation of the hot melt block 30.

[0054] In some optional embodiments, two hot melt parts 32 are provided, and the two hot melt parts 32 are respectively arranged on both sides of the fixing part 31, and the two hot melt parts 32 are respectively extended from the opposite side walls of the base 10; one of the two hot melt parts 32 is a commonly used hot melt part 32, and the other is a spare hot melt part 32, so that when the commonly used hot melt part 32 is damaged, hot melting can continue to be performed through the spare hot melt part 32, thereby improving the convenience of using the hot melt head.

[0055] Preferably, the hot melt portion 32 is a metal block, which replaces the metal sheet hot melt strip as the working surface, so that the hot melt point is flat and regular, and the phenomenon of irregular hot melt point or false melting caused by poor contact between the hot melt point and the Mylar film can be avoided.

[0056] Furthermore, the outer surface of the hot melt block 30 is coated with a high-temperature insulating layer to protect the life of the hot melt block 30, avoid the Teflon glue from being easily worn and sticking and drawing when the hot melt block 30 is over-melted, avoid the drawing phenomenon at the hot melting point, improve the hot melting effect of the hot melt head, and ensure the yield rate of the battery coated with Mylar film.

[0057] Optionally, the high-temperature insulation layer is at least one of a polymer coating such as polyimide (PEEK), polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK) and a ceramic coating such as aluminum oxide, zirconium oxide, titanium oxide, aluminum nitride, silicon nitride, boron nitride, silicon carbide, etc., all of which can achieve the high temperature resistance and insulation effects of the high-temperature insulation layer.

[0058] Please refer to Figure 1 and Figure 2 In the present embodiment, two temperature detecting members are provided, and the two temperature detecting members are respectively arranged near the two hot-melt portions 32, that is, the temperature detecting member and the hot-melt portion 32 are arranged on the same surface of the base 10, so as to realize the detection of the temperature of the hot-melt portion 32, avoid the temperature detected by the temperature detecting member being too different from the temperature of the hot-melt portion 32, and improve the accuracy of the temperature detected by the temperature detecting member.

[0059] Optionally, the temperature detection element is a thermocouple, which can realize real-time monitoring of the hot-melt temperature of the base 10, and has a simple structure and low cost.

[0060] Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 In order to realize the detachable connection between the hot melt block 30 and the base 10, the hot melt head further includes a fixing pin 40. The base 10 is provided with a fixing hole 13. The hot melt block 30 is inserted into the fixing hole 13. The fixing pin 40 is inserted into the fixing hole 13 of the base 10 and is limitedly connected with the hot melt block 30. When installing, the fixing portion 31 of the hot melt block 30 is first inserted into the base 10. At this time, the fixing portion 31 of the hot melt block 30 is inserted into the side wall of the fixing hole 13, and then the fixing pin 40 is inserted and fixed in the fixing hole 13, so that the fixing pin 40 and the hot melt block 30 can be limitedly connected; when disassembling, the fixing pin 40 can be pulled out.

[0061] Furthermore, the hot melt block 30 is provided with a limiting through hole 311, and the fixing pin 40 is passed through the limiting through hole 311; after the hot melt block 30 is installed, the limiting through hole 311 coincides with the fixing hole 13, and the fixing pin 40 is passed through the limiting through hole 311 and plugged into the fixing hole 13, and the fixing pin 40 can be limited by the hole wall of the fixing hole 13, thereby achieving the limitation of the hot melt block 30.

[0062] Specifically, the heating tube 20 is passed through two opposite sides of the base 10, the hot melt block 30 is passed through the other two opposite sides of the base 10, and the fixing pin 40 is inserted into the base 10 along the vertical direction from the top of the base 10, which can not only ensure the limiting and fixing effect of the fixing pin 40 on the hot melt block 30, but also avoid direct contact between the fixing pin 40 and the heating tube 20, thereby avoiding affecting the service life of the fixing pin 40.

[0063] Optionally, the length of the fixing pin 40 is greater than the depth of the fixing hole 13 , so that it is convenient for an operator to insert and remove the fixing pin 40 .

[0064] Optionally, each edge of the fixing pin 40 is provided with a rounded corner or a chamfered corner to prevent the base 10 and the hot melt block 30 from being scratched during the insertion and removal of the fixing pin 40 .

[0065] It should be noted that, in order to reduce the temperature loss during the process of transferring the heating temperature of the heating pipe 20 to the hot melt block 30, the hot melt block 30, the base 10 and the fixing pin 40 are made of metal materials with high thermal conductivity. Optionally, the hot melt block 30, the base 10 and the fixing pin 40 are made of brass material, which has high thermal conductivity, is easy to process, has low cost, and has a certain hardness.

[0066] This embodiment also provides a Mylar film coating hot melt device, which includes the hot melt head described in any of the above schemes. By adopting the above hot melt head, the occurrence of false melting and over-melting between the battery electrode group and the Mylar film is avoided, and the Mylar film hot melt efficiency and the yield rate of battery coating Mylar film are improved.

[0067] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Hot melt head, characterized in that: include: Base (10); A heating pipe (20), the heating pipe (20) being inserted into the base (10), and the heating pipe (20) being electrically connected to an external power supply device to heat the base (10); A hot melt block (30), a portion of which is inserted into the base (10) and another portion of which extends out of the base (10) for hot melting a hot melt component; A temperature detection component is installed on the base (10), and is used to detect the temperature of the base (10).

2. The hot melt head according to claim 1, characterized in that: The hot melt block (30) comprises a fixed portion (31) and a hot melt portion (32) connected to each other, wherein the fixed portion (31) is detachable from the base (10), and at least a portion of the hot melt portion (32) extends out of the base (10) to be used for hot melting the hot melt component.

3. The hot melt head according to claim 2, characterized in that: The cross-sectional area of ​​the hot-melt portion (32) is not greater than the cross-sectional area of ​​the fixing portion (31).

4. The hot melt head according to claim 2, characterized in that: Two hot-melt portions (32) are provided, and the two hot-melt portions (32) are respectively arranged on both sides of the fixing portion (31), and the two hot-melt portions (32) respectively extend from two opposite side walls of the base (10).

5. The hot melt head according to claim 1, characterized in that: It also includes a fixing pin (40), the base (10) is provided with a fixing hole (13), the hot melt block (30) is inserted into the fixing hole (13), and the fixing pin (40) is inserted into the fixing hole (13) of the base (10) and is connected to the hot melt block (30) in a limiting manner.

6. The hot melt head according to claim 5, characterized in that: The hot melt block (30) is provided with a limiting through hole (311), and the fixing pin (40) is inserted through the limiting through hole (311).

7. The hot melt head according to claim 1, characterized in that: The heating tube (20) and the temperature detection element are both located close to the hot melt block (30).

8. The hot melt head according to claim 1, characterized in that: The insertion direction of the hot melt block (30) and the insertion direction of the heating tube (20) are perpendicular to each other, and the insertion direction of the hot melt block (30) is the same as the installation direction of the temperature detection component.

9. The hot melt head according to claim 8, characterized in that: The base (10) is provided with a first insertion hole (11) and a second insertion hole (12), and the extension directions of the first insertion hole (11) and the second insertion hole (12) are perpendicular to each other. The heating tube (20) is inserted into the first insertion hole (11), and the hot melt block (30) is inserted into the second insertion hole (12). Along the extension direction of the second insertion hole (12), the base (10) is provided with a mounting hole (14), and the temperature detection component is installed in the mounting hole (14).

10. The hot melt head according to any one of claims 1 to 9, characterized in that: The outer surface of the hot melt block (30) is coated with a high-temperature insulating coating.

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