End socket structure and battery packaging device

Abstract

The utility model discloses an end socket structure and a battery packaging device, and relates to the technical field of battery production, the end socket structure comprises an end socket body and an adapter; the sealing head body is provided with a film body sealing part and an electrode sealing groove which are adjacently arranged, the film body sealing part is used for pressing a soft coating film material of a target battery, and the electrode sealing groove is used for pressing a tab of the target battery; the adapter is detachably connected between the film body sealing part and the electrode sealing groove, and the adapter is used for pushing the sealant between the soft film material and the tab to a preset sealing area. According to the scheme, a groove position mark on a traditional seal head is replaced with the detachable adapter, when the adapter is abraded to a certain degree, only a new adapter needs to be independently replaced, the seal head structure does not need to be integrally replaced, and therefore the problem that the material cost, the labor cost and the time cost are greatly increased due to the fact that the seal head structure is integrally replaced is solved, and the production efficiency is improved. And the production efficiency is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a head structure and a battery packaging device. Background Art

[0002] With the rapid development of portable electronic devices and electric vehicles, the demand for high-performance, high-energy-density batteries is also growing. Among the many battery technologies, lithium-ion batteries have become the mainstream choice due to their advantages such as high energy density, long cycle life and low self-discharge rate. Among them, soft-pack lithium batteries occupy an important position in the battery market with their unique structure and performance characteristics.

[0003] Soft-pack lithium battery, also known as polymer lithium battery or lithium-ion soft-pack battery, is a lithium-ion battery that uses aluminum-plastic laminate (APL) as the outer shell. Compared with traditional hard-shell lithium batteries, soft-pack lithium batteries have the advantages of high energy density, flexible shape design, high safety, light weight, and long cycle life.

[0004] In the actual production process of soft-pack lithium batteries, the top sealing process is involved. Usually, the aluminum-plastic composite film part and the electrode part on the shell of the soft-pack lithium battery are pressed together by the head, so that the aluminum-plastic composite film part and the electrode part can be adhered by the sealant under certain pressure, temperature, time factors and other conditions, and finally sealed to form a whole, which can ensure the airtightness of the soft-pack lithium battery after packaging. Among them, there is a step position at the turning point between the flat area on the head used for pressing the aluminum-plastic composite film part and the groove area on the head used for pressing the electrode part. The step position is called the groove position mark. The role of the groove position mark is to squeeze and push the sealant during the head pressing process, so that the sealant at the junction of the aluminum-plastic composite film part and the electrode part is fully filled.

[0005] After repeated packaging operations, the slot mark of the head is usually the most severely worn. When the slot mark is worn to a certain extent, it will be difficult to ensure that the sealant at the junction of the aluminum-plastic composite film part and the electrode part is fully filled, which may cause leakage inside the soft-pack lithium battery, posing a serious safety hazard. Therefore, when the slot mark is worn, the head needs to be replaced as a whole, and the cost of replacing the head is high, and the removal, reinstallation, and debugging of the head take a long time, which will reduce the production efficiency of the production line; in addition, after the head is replaced, a more complex and time-consuming quality confirmation process is required, which greatly increases the workload of the operator. Utility Model Content

[0006] The main purpose of the present application is to provide a head structure, aiming to solve the technical problem that the existing head needs to be replaced as a whole after the groove printing of the head is worn, and the replacement of the head requires high material, manpower and time costs.

[0007] To achieve the above purpose, the head structure proposed in this application includes:

[0008] A sealing head body, wherein the sealing head body has a film sealing portion and an electrode sealing groove which are adjacently arranged, wherein the film sealing portion is used to press the soft package film material of the target battery, and the electrode sealing groove is used to press the tab of the target battery;

[0009] An adapter is detachably connected between the film body sealing portion and the electrode sealing groove, and is used to push the sealant between the soft-pack film material and the electrode ear to a preset sealing area.

[0010] The head structure provided in this embodiment replaces the groove mark on the traditional head with a detachable adapter, and squeezes and pushes the sealant during the process of pressing the target battery, so that the sealant at the junction of the soft-pack membrane material and the electrode of the target battery is fully filled; and when the adapter has a certain degree of wear after multiple packaging operations, it is only necessary to replace it with a new adapter alone, without replacing the head structure as a whole, thereby eliminating the time-consuming and complex operations such as disassembly, reinstallation, debugging, and quality confirmation of the head structure, effectively avoiding the problem of a significant increase in material, manpower and time costs due to the overall replacement of the head structure, thereby ensuring production efficiency.

[0011] In some embodiments, the adapter is locked to the head body via a first threaded connection.

[0012] This embodiment uses a threaded connection to achieve installation between the adapter and the head body, which has the advantages of convenient operation, easy disassembly and assembly, stable connection, and convenient subsequent maintenance.

[0013] In some embodiments, a receiving cavity is opened on the surface of the head body; the adapter has a mounting portion and an extrusion portion, the mounting portion is embedded in the receiving cavity, and the extrusion portion is used to push the sealant between the soft coating material and the pole ear to the preset sealing area.

[0014] When the adapter is configured to have two parts, namely, a mounting portion and an extrusion portion, different structures and dimensions can be designed for the mounting portion and the extrusion portion, respectively, so that the mounting portion can be better adapted to the accommodating cavity, thereby being able to more conveniently and smoothly complete the connection and installation between the adapter and the head body, and at the same time, the extrusion portion can be better utilized to extrude and push the sealant at the junction of the soft-coated membrane material and the electrode to form a preset filling form. Among them, when the mounting portion is embedded in the accommodating cavity, on the one hand, the accommodating cavity can be used to limit the adapter, making it easier to fix the adapter on the head body, and also to a certain extent, avoiding the subsequent positional displacement of the adapter relative to the head body; on the other hand, it can avoid the adapter being exposed too much on the surface of the head body and interfering with other devices.

[0015] In some embodiments, an arc-shaped connecting portion is provided at the connection between the mounting portion and the extrusion portion.

[0016] In this embodiment, by setting the connection position between the two parts of the adapter (i.e., the mounting portion and the extrusion portion) to a smooth transition shape (i.e., the mounting portion and the extrusion portion are connected by an arc-shaped connection portion), the stress concentration phenomenon at the structural mutation point can be reduced, and the stress distribution on the adapter can be made more uniform, thereby improving the overall structural strength, durability and reliability of the adapter.

[0017] In some embodiments, the depth direction of the accommodating cavity is perpendicular to the pressing direction of the head body, the mounting portion is configured as a columnar structure, and the mounting portion is embedded in the accommodating cavity along the depth direction of the accommodating cavity.

[0018] Taking the pressing direction of the head body as the up and down direction as an example, the depth direction of the accommodating cavity is the horizontal direction (front and back direction or left and right direction), and the mounting portion can also be set as a columnar structure extending in the horizontal direction. In this way, when installing the adapter, the mounting portion can be embedded in the accommodating cavity in the horizontal direction without moving the adapter in the up and down direction, thereby effectively avoiding the problem of difficulty in completing the installation of the adapter due to insufficient space in the pressing direction (for example, the gap between the upper head and the lower head is small).

[0019] In some embodiments, the mounting portion is configured as a cylindrical structure.

[0020] By setting the mounting portion as a cylindrical structure, the corner portions and turning portions on the mounting portion can be minimized to the greatest extent, and the accommodating cavity can be correspondingly set to a cylindrical cavity structure to match the mounting portion. In this way, when the mounting portion is inserted into the accommodating cavity or removed from the accommodating cavity, the problem of the mounting portion getting stuck relative to the accommodating cavity can be avoided to the greatest extent.

[0021] In some embodiments, the head body is provided with a receiving groove, the receiving groove is arranged to penetrate along the depth direction of the receiving cavity, the extrusion portion is arranged as a strip structure, and the extrusion portion is snap-fitted into the receiving groove.

[0022] Taking the pressing direction of the head body as the up and down direction as an example, the depth direction of the accommodating cavity is the horizontal direction (front and back direction or left and right direction), and the accommodating groove is also arranged to penetrate the head body along the horizontal direction. In this way, the accommodating cavity and the accommodating groove can be respectively connected and cooperated with the mounting parts and the extrusion parts of different structural forms, thereby improving the connection stability between the adapter and the head body.

[0023] In some embodiments, the accommodating cavity and the accommodating groove are arranged in sequence along the pressing direction of the head body, the maximum width of the accommodating cavity along the first direction is greater than the groove width of the accommodating groove, the first direction is perpendicular to the pressing direction of the head body, and the first direction is perpendicular to the depth direction of the accommodating cavity.

[0024] Taking the head body as an example to represent the upper head, the pressing direction of the head body is vertically downward, the accommodating groove can be set on the lower side of the accommodating cavity, the depth direction of the accommodating cavity can be set to the front-to-back direction, the accommodating groove extends along the front-to-back direction, and the first direction can be set to the left-to-right direction; when the maximum width of the accommodating cavity along the first direction is greater than the groove width of the accommodating groove along the first direction, the accommodating cavity and the accommodating groove can form a reverse buckle structure, and correspondingly, the maximum width of the mounting portion along the first direction is also greater than the width of the extrusion portion along the first direction. In this way, when the mounting portion and the extrusion portion are respectively connected and matched with the accommodating cavity and the accommodating groove, based on the limiting effect of the reverse buckle structure, the adapter can be limited from moving in the up and down directions relative to the head body, thereby forming a better limiting effect on the adapter, thereby improving the connection stability between the adapter and the head body.

[0025] In some embodiments, the extrusion portion extends along a depth direction of the accommodating cavity, and a first end of the extrusion portion is connected to the mounting portion.

[0026] Taking the depth direction of the accommodating cavity as the front-to-back direction as an example, the first end of the extrusion part is connected to the mounting part, and the length of the extrusion part in the front-to-back direction can be specifically set according to the thickness of the head body, so that the first end of the extrusion part is flush with the front side surface of the head body, and at the same time, the second end of the extrusion part is flush with the rear side surface of the head body. In this way, the coverage range of the extrusion part in the front-to-back direction can be maximized, thereby ensuring that the extrusion part can extrude and push the sealant more fully.

[0027] In some embodiments, a chamfered structure or a rounded structure is provided at a corner position of the second end of the extrusion portion.

[0028] In the process of embedding the mounting portion into the receiving cavity, the second end of the extrusion portion will first enter the receiving groove. By providing a chamfered structure or a rounded structure at the corner position of the second end of the extrusion portion, the chamfered structure or the rounded structure can be utilized to play a certain guiding role, so that the extrusion portion can be more smoothly inserted into the receiving groove.

[0029] In some embodiments, the adapter is provided with a dislocation screw hole; the dislocation screw hole is used to lock the second threaded connector, so as to push the adapter to separate from the head body through the abutment between the second threaded connector and the head body.

[0030] In this embodiment, a dislocation screw hole is opened on the adapter. When the adapter needs to be disassembled, the second threaded connection member can be screwed into the dislocation screw hole so that the second threaded connection member abuts against the cavity wall of the accommodating cavity, and then the second threaded connection member is continued to be screwed. In this way, the adapter can be driven to move in a direction away from the accommodating cavity, and finally the adapter and the accommodating cavity can be separated.

[0031] In some embodiments, the adapter is provided with a connecting screw hole; the connecting screw hole is used to lock the first threaded connector so as to lock the adapter to the head body through the first threaded connector; the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole.

[0032] When the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole, the contact area between the second threaded connection piece and the cavity wall of the accommodating cavity can be increased. When the second threaded connection piece abuts against the cavity wall of the accommodating cavity, it can exert force better, thereby driving the adapter to separate from the accommodating cavity more smoothly.

[0033] In some embodiments, the sealing head body is provided with a glue overflow groove, the glue overflow groove is communicated with the membrane sealing portion, and the glue overflow groove is used to collect the sealant overflowing from the membrane sealing portion.

[0034] The setting of the overflow groove ensures that the overflowed sealant is regularly controlled in the designated area instead of overflowing randomly. By specifically setting the depth of the overflow groove, the thickness of the overflowed portion can be controlled, thereby effectively solving the problem of uncontrollable edge sealing thickness, improving the consistency and reliability of packaging, and controlling the overall thickness of the target battery after packaging.

[0035] The present application also proposes a battery packaging device, which includes the aforementioned head structure.

[0036] In this embodiment, a detachable adapter replaces the groove mark on the traditional head, and the sealant is squeezed and pushed during the process of pressing the target battery, so that the sealant at the junction of the soft-pack membrane material and the electrode of the target battery is fully filled; and when the adapter has a certain degree of wear after multiple packaging operations, it is only necessary to replace it with a new adapter alone, without the need to replace the head structure as a whole, thereby eliminating the time-consuming and complex operations such as disassembly, reinstallation, debugging, and quality confirmation of the head structure, effectively avoiding the problem of a significant increase in material, manpower and time costs due to the overall replacement of the head structure, thereby ensuring production efficiency.

[0037] In some embodiments, the battery packaging device further includes a heating element and a driving device, and the heating element and the driving device are connected to the sealing head body;

[0038] The driving device is used to drive the sealing head body to move so as to perform a compression sealing operation on the target battery; the heating element is used to transfer heat to the sealing head body so as to heat the target battery.

[0039] By setting a driving device, the sealing head body can be conveniently driven to press the target battery. By setting a heating element, when the film sealing portion of the sealing head body is pressed onto the soft-package film material of the target battery and the electrode sealing groove of the sealing head body is pressed onto the pole ear of the target battery, the heating element can perform a heating operation, and transfer the heat to the target battery through the sealing head body, so that the soft-package film material and sealant of the target battery are melted and bonded at high temperature, thereby completing the sealing operation of the target battery in a heat-sealed manner.

[0040] In some embodiments, one side of the heating element is connected to the head body, and the other side of the heating element is connected to the driving device;

[0041] The battery packaging device further includes a heat insulating member, which is disposed between the heat generating body and the driving device.

[0042] By providing a heat insulating member, heat conduction between the heating element and the driving device can be blocked, thereby preventing excessive heat generated by the heating element from being transferred to the driving device and causing overheating and damage to the driving device. This can protect the driving device and ensure the operating stability and reliability of the driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0044] Figure 1 It is a structural schematic diagram of a top sealing head in the prior art;

[0045] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0046] Figure 3 This is a schematic diagram of the assembly structure of an embodiment of the head structure of the present application;

[0047] Figure 4 This is a schematic diagram of the exploded structure of an embodiment of the head structure of the present application;

[0048] Figure 5 This is a schematic structural diagram of an embodiment of a battery packaging device of the present application.

[0049] Description of Figure Numbers:

[0050] 100, top seal head; 101, plane area; 102, groove area; 103, groove position mark;

[0051] 1. Head body; 11. Membrane sealing part; 12. Electrode sealing groove; 13. Accommodating cavity; 14. Accommodating groove; 15. Glue overflow groove;

[0052] 2. Adapter; 21. Mounting portion; 22. Extrusion portion; 23. Arc-shaped connecting portion; 24. Connecting screw hole;

[0053] 3. First threaded connector; 4. Heating element; 5. Heat insulating element.

[0054] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] 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 only 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.

[0056] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0057] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0058] See also Figure 1 and Figure 2 In the actual production process of soft-pack lithium batteries, the top-sealing process is involved. Usually, the aluminum-plastic composite film part and the electrode part on the shell of the soft-pack lithium battery are pressed together by the top-sealing head 100, so that the aluminum-plastic composite film part and the electrode part are adhered by the sealant under certain pressure, temperature, time factors and other conditions, and finally sealed to form a whole, which can ensure the airtightness of the soft-pack lithium battery after packaging. Among them, there is a step position at the turning point between the plane area 101 on the top-sealing head 100 for pressing the aluminum-plastic composite film part and the groove area 102 on the top-sealing head 100 for pressing the electrode part. The step position is called the groove position mark 103. The function of the groove position mark 103 is to squeeze and push the sealant during the pressing process of the top-sealing head 100, so that the sealant at the junction of the aluminum-plastic composite film part and the electrode part is fully filled.

[0059] After the top seal head 100 has been repeatedly packaged for many times, the position where the slot mark 103 is located is usually the most severely worn. When the slot mark 103 is worn to a certain extent, it will be difficult to ensure that the sealant at the junction of the aluminum-plastic composite film part and the electrode part is fully filled, which may cause leakage inside the soft-pack lithium battery, posing a serious safety hazard. Therefore, when the slot mark 103 is worn, the top seal head 100 needs to be replaced as a whole, and the cost of replacing the top seal head 100 is high, and the disassembly, reinstallation, and debugging of the top seal head 100 take a long time, which will reduce the production efficiency of the production line; in addition, after the top seal head 100 is replaced, a more complicated and time-consuming quality confirmation process is required, which greatly increases the workload of the operator.

[0060] Based on the above problems, in order to avoid frequent replacement of the entire top seal head 100 after the groove mark 103 of the top seal head 100 is worn, the present application provides a head structure, please refer to Figure 3 and Figure 4 , the head structure includes:

[0061] The sealing head body 1 has a film sealing portion 11 and an electrode sealing groove 12 which are arranged adjacent to each other. The film sealing portion 11 is used for pressing a soft-package film material (not shown in the figure) of a target battery (not shown in the figure), and the electrode sealing groove 12 is used for pressing a tab (not shown in the figure) of the target battery;

[0062] The adapter 2 is detachably connected between the film body sealing portion 11 and the electrode sealing groove 12, and is used to push the sealant between the soft-pack film material and the electrode ear to a preset sealing area (not shown in the figure).

[0063] In this embodiment, the head body 1 may refer to an upper head and / or a lower head; for the upper head, the lower side surface of the upper head constitutes a membrane sealing portion 11, and a groove is provided on the lower side surface of the upper head, and the groove constitutes an electrode sealing groove 12; for the lower head, the upper side surface of the lower head constitutes the membrane sealing portion 11, and a groove is provided on the upper side surface of the lower head, and the groove constitutes the electrode sealing groove 12.

[0064] like Figure 3 As shown, taking the head body 1 including the upper head and the lower head as an example, when the target battery needs to be top-sealed, the target battery is usually placed on the packaging station between the upper head and the lower head, so that the electrode sealing groove 12 of the upper head and the electrode sealing groove 12 of the lower head are aligned with the pole ear of the target battery, and then the upper head and the lower head are driven close to each other until the upper head and the lower head are in a closed state. At this time, the pole ear of the target battery will be pressed between the electrode sealing groove 12 of the upper head and the electrode sealing groove 12 of the lower head, and the soft-package film material part of the target battery except the pole ear will be pressed between the film body sealing part 11 of the upper head and the film body sealing part 11 of the lower head. Subsequently, pressurization, heating and other operations can be coordinated, so that the soft-package film material and the pole ear can be bonded by sealant under certain pressure, temperature, time factors and other conditions, and finally the packaging process of the target battery is completed.

[0065] During the process of the head body 1 performing the above-mentioned pressing operation on the target battery, the exposed part of the adapter 2 between the membrane sealing part 11 and the electrode sealing groove 12 can play the role of the groove position print on the traditional head, squeeze and push the sealant, so that the sealant at the junction of the soft-pack membrane material and the electrode is fully filled. Since the adapter 2 can be removed from the head body 1, when the head body 1 repeatedly performs multiple packaging operations and the adapter 2 is worn to a certain extent, it is only necessary to replace the new adapter 2 alone, without the need to replace the head structure as a whole, thereby effectively avoiding the problem of a significant increase in material, labor and time costs caused by the overall replacement of the head structure.

[0066] The adapter 2 can be detachably connected to the head body 1 by means of threaded connection, pin connection, snap connection, etc., which is not limited here.

[0067] It can be seen that the head structure provided in this embodiment replaces the groove print on the traditional head with a detachable adapter 2, and squeezes and pushes the sealant during the process of pressing the target battery, so that the sealant at the junction of the soft-pack membrane material and the electrode of the target battery is fully filled; and when the adapter 2 has a certain degree of wear after multiple packaging operations, it is only necessary to replace it with a new adapter 2 alone, and there is no need to replace the head structure as a whole, thereby eliminating the time-consuming and complex operations such as disassembly, reinstallation, debugging, and quality confirmation of the head structure, effectively avoiding the problem of a significant increase in material, manpower and time costs due to the overall replacement of the head structure, thereby ensuring production efficiency.

[0068] In some embodiments, reference Figure 3 and Figure 4 The adapter 2 is locked to the head body 1 through the first threaded connection 3.

[0069] This embodiment uses a threaded connection to achieve the installation between the adapter 2 and the head body 1, which has the advantages of convenient operation, easy disassembly and assembly, stable connection, and convenient subsequent maintenance. Among them, the first threaded connection member 3 may include bolts, screws, studs, nuts, etc.; taking the first threaded connection member 3 as an example of a bolt, one of the adapter 2 and the head body 1 can be provided with a connecting through hole, and the other of the adapter 2 and the head body 1 can be provided with a threaded hole. The first threaded connection member 3 can pass through the connecting through hole and be locked in the threaded hole to lock the adapter 2 on the head body 1.

[0070] In some embodiments, reference Figure 3 and Figure 4 A receiving cavity 13 is provided on the surface of the head body 1; the adapter 2 has a mounting portion 21 and an extrusion portion 22, the mounting portion 21 is embedded in the receiving cavity 13, and the extrusion portion 22 is used to push the sealant between the soft-coated film material and the pole ear to a preset sealing area.

[0071] When the adapter 2 is configured to have a mounting portion 21 and an extrusion portion 22, different structures and dimensions can be designed for the mounting portion 21 and the extrusion portion 22, respectively, so that the mounting portion 21 can be better adapted to the accommodating cavity 13, thereby enabling the connection and installation between the adapter 2 and the head body 1 to be completed more conveniently and smoothly. At the same time, the extrusion portion 22 can be better utilized to extrude and push the sealant at the junction of the soft-coated membrane material and the electrode to form a preset filling shape.

[0072] Among them, when the mounting portion 21 is embedded in the accommodating cavity 13, on the one hand, the accommodating cavity 13 can be used to limit the adapter 2, which makes it easier to fix the adapter 2 on the head body 1, and can also prevent the adapter 2 from being displaced relative to the head body 1 in the future to a certain extent; on the other hand, it can prevent the adapter 2 from being exposed too much on the surface of the head body 1 and interfering with other devices.

[0073] In some embodiments, reference Figure 3 and Figure 4 An arc-shaped connecting portion 23 is provided at the connection between the mounting portion 21 and the extruding portion 22 .

[0074] In this embodiment, by setting the connection position between the two parts of the adapter 2 (i.e., the mounting portion 21 and the extrusion portion 22) to a smooth transition shape (i.e., the mounting portion 21 and the extrusion portion 22 are connected by the arc-shaped connection portion 23), the stress concentration phenomenon at the structural mutation point can be reduced, and the stress distribution on the adapter 2 can be made more uniform, thereby improving the overall structural strength, durability and reliability of the adapter 2.

[0075] In some embodiments, reference Figure 3 and Figure 4 The depth direction of the accommodating cavity 13 is perpendicular to the pressing direction of the head body 1 , and the mounting portion 21 is configured as a columnar structure, and the mounting portion 21 is embedded in the accommodating cavity 13 along the depth direction of the accommodating cavity 13 .

[0076] Taking the pressing direction of the head body 1 as the up and down direction as an example, the depth direction of the accommodating cavity 13 is the horizontal direction (front and back direction or left and right direction), and the mounting portion 21 can also be set as a columnar structure extending in the horizontal direction. In this way, when installing the adapter 2, the mounting portion 21 can be embedded in the accommodating cavity 13 in the horizontal direction without moving the adapter 2 in the up and down direction, thereby effectively avoiding the problem of difficulty in completing the installation of the adapter 2 due to insufficient space in the pressing direction (for example, the gap between the upper head and the lower head is small).

[0077] In some embodiments, reference Figure 3 and Figure 4 , the mounting portion 21 is configured as a cylindrical structure.

[0078] By configuring the mounting portion 21 as a cylindrical structure, the corner portions and turning portions on the mounting portion 21 can be minimized, and the accommodating cavity 13 can be configured as a cylindrical cavity structure to match the mounting portion 21. In this way, when the mounting portion 21 is inserted into or removed from the accommodating cavity 13, the mounting portion 21 can be prevented from getting stuck relative to the accommodating cavity 13 to the greatest extent.

[0079] In some embodiments, reference Figure 3 and Figure 4 The head body 1 is provided with a receiving groove 14 , which is arranged to penetrate along the depth direction of the receiving cavity 13 , and the extrusion portion 22 is arranged to be a strip structure, and the extrusion portion 22 is snap-fitted into the receiving groove 14 .

[0080] Taking the pressing direction of the end cap body 1 as the up-down direction as an example, the depth direction of the accommodating cavity 13 is the horizontal direction (front-back direction or left-right direction), and the accommodating groove 14 is also set to penetrate the end cap body 1 in the horizontal direction, so that the accommodating cavity 13 and the accommodating groove 14 can be used to connect and cooperate with the mounting part 21 and the extrusion part 22 of different structural forms, respectively, to improve the connection stability between the adapter 2 and the end cap body 1. Among them, one side of the extrusion part 22 can be snap-fitted into the accommodating groove 14, and the other side of the extrusion part 22 can be exposed on the surface of the end cap body 1 and used to extrude and push the sealant at the junction of the soft-coated film material and the electrode.

[0081] In some embodiments, reference Figure 3 and Figure 4 The accommodating cavity 13 and the accommodating groove 14 are arranged in sequence along the pressing direction of the head body 1. The maximum width of the accommodating cavity 13 along the first direction is greater than the groove width of the accommodating groove 14. The first direction is perpendicular to the pressing direction of the head body 1, and the first direction is perpendicular to the depth direction of the accommodating cavity 13.

[0082] Schematically, taking the head body 1 as an example to represent the upper head, the pressing direction of the head body 1 is vertically downward, the accommodating groove 14 can be set at the lower side of the accommodating cavity 13, the depth direction of the accommodating cavity 13 can be set to the front-to-back direction, the accommodating groove 14 extends along the front-to-back direction, and the first direction can be set to the left-to-right direction; when the maximum width of the accommodating cavity 13 along the first direction is greater than the groove width of the accommodating groove 14 along the first direction, the accommodating cavity 13 and the accommodating groove 14 can form a reverse buckle structure, and correspondingly, the maximum width of the mounting portion 21 along the first direction is also greater than the width of the extrusion portion 22 along the first direction. In this way, when the mounting portion 21 and the extrusion portion 22 are respectively connected and matched with the accommodating cavity 13 and the accommodating groove 14, based on the limiting effect of the reverse buckle structure, the adapter 2 can be limited to move in the up and down directions relative to the head body 1, thereby forming a better limiting effect on the adapter 2, thereby improving the connection stability between the adapter 2 and the head body 1.

[0083] When the head body 1 refers to the lower head, its specific structural setting can be deduced by referring to the above description, and will not be repeated here.

[0084] In some embodiments, reference Figure 3 and Figure 4 The extrusion portion 22 extends along the depth direction of the accommodating cavity 13 , and a first end of the extrusion portion 22 is connected to the mounting portion 21 .

[0085] Illustratively, taking the depth direction of the accommodating cavity 13 as the front-to-back direction as an example, the first end of the extrusion portion 22 is connected to the mounting portion 21, and the length of the extrusion portion 22 in the front-to-back direction can be specifically set according to the thickness of the head body 1, so that the first end of the extrusion portion 22 is flush with the front side surface of the head body 1, and the second end of the extrusion portion 22 is flush with the rear side surface of the head body 1. In this way, the coverage range of the extrusion portion 22 in the front-to-back direction can be maximized, thereby ensuring that the extrusion portion 22 can more fully extrude and push the sealant.

[0086] In some embodiments, reference Figure 3 and Figure 4 The corner position of the second end of the extrusion portion 22 is provided with a chamfered structure (not shown in the figure) or a rounded structure (not shown in the figure).

[0087] Specifically, in the process of embedding the mounting portion 21 into the accommodating cavity 13, the second end of the extruding portion 22 will first enter the accommodating groove 14. By setting a chamfered structure or a rounded structure at the corner position of the second end of the extruding portion 22, the chamfered structure or the rounded structure can be utilized to play a certain guiding role, so that the extruding portion 22 can be more smoothly inserted into the accommodating groove 14.

[0088] In some embodiments, reference Figure 3 and Figure 4The adapter 2 is provided with a dislocation screw hole (not shown in the figure); the dislocation screw hole is used to lock the second threaded connection member (not shown in the figure) so as to push the adapter 2 and the head body 1 to separate through the abutment between the second threaded connection member and the head body 1.

[0089] When the adapter 2 is fitted in the accommodating cavity 13 for a long time, the adapter 2 may adhere to the head body 1 due to the force and heat for a long time, which makes it difficult to remove the adapter 2 from the accommodating cavity 13 during subsequent replacement. Based on this problem, the present embodiment provides a dislocation screw hole on the adapter 2. When the adapter 2 needs to be disassembled, the second threaded connector can be screwed into the dislocation screw hole so that the second threaded connector abuts against the cavity wall of the accommodating cavity 13, and then the second threaded connector is screwed on continuously, so that the adapter 2 can be driven to move in a direction away from the accommodating cavity 13, and finally the adapter 2 can be separated from the accommodating cavity 13.

[0090] The second threaded connection member may be a bolt, a screw, a stud, etc., which is not limited here.

[0091] In some embodiments, reference Figure 3 and Figure 4 The adapter 2 is provided with a connecting screw hole 24; the connecting screw hole 24 is used to lock the first threaded connector 3, so as to lock the adapter 2 on the head body 1 through the first threaded connector 3; the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole 24.

[0092] This embodiment uses a threaded connection to achieve the installation between the adapter 2 and the head body 1, which has the advantages of convenient operation, easy disassembly and assembly, stable connection, and convenient subsequent maintenance. Among them, the first threaded connection 3 may include bolts, screws, studs, nuts, etc., which are not limited here. When the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole 24, the contact area between the second threaded connection and the cavity wall of the accommodating cavity 13 can be increased. When the second threaded connection abuts against the cavity wall of the accommodating cavity 13, it can better apply force, thereby more smoothly driving the adapter 2 to separate from the accommodating cavity 13.

[0093] In some embodiments, reference Figures 3 to 5 The sealing head body 1 is provided with a glue overflow groove 15 , which is communicated with the membrane sealing portion 11 , and is used to collect the sealant overflowing from the membrane sealing portion 11 .

[0094] like Figure 5As shown, the overflow glue groove 15 can be distributed on the left and right sides of the head body 1, and one side of the membrane sealing part 11 close to the left and right sides of the head body 1 is connected to the electrode sealing groove 12, and the other side is connected to the overflow glue groove 15; in the process of the head body 1 performing a compression sealing operation on the target battery, taking the head body 1 including an upper head and a lower head as an example, a flow channel is formed between the membrane sealing part 11 of the upper head and the membrane sealing part 11 of the lower head, and the overflowed sealant can flow along the flow channel to the overflow glue groove 15. The setting of the overflow glue groove 15 makes the overflowed sealant be regularly controlled in the designated area instead of overflowing irregularly; and by specifically setting the depth of the overflow glue groove 15, the thickness of the overflowed glue part can be controlled, thereby effectively solving the problem of uncontrollable edge sealing thickness, improving the consistency and reliability of packaging, and controlling the overall thickness of the target battery after packaging.

[0095] In some embodiments, reference Figures 3 to 5The sealing structure includes a sealing body 1 and an adapter 2; the sealing body 1 has a film sealing portion 11 and an electrode sealing groove 12 arranged adjacent to each other, the film sealing portion 11 is used to press the soft-package film material of the target battery, and the electrode sealing groove 12 is used to press the pole ear of the target battery; the adapter 2 is detachably connected between the film sealing portion 11 and the electrode sealing groove 12, and the adapter 2 is used to push the sealant between the soft-package film material and the pole ear to a preset sealing area; the adapter 2 is locked to the sealing body 1 through a first threaded connector 3; a receiving cavity 13 is opened on the surface of the sealing body 1; the adapter 2 has an installation The mounting portion 21 and the extrusion portion 22, the mounting portion 21 is embedded in the accommodating cavity 13, and the extrusion portion 22 is used to push the sealant between the soft-coated film material and the pole ear to the preset sealing area; the connection between the mounting portion 21 and the extrusion portion 22 is provided with an arc-shaped connecting portion 23; the depth direction of the accommodating cavity 13 is perpendicular to the pressing direction of the head body 1, and the mounting portion 21 is set as a columnar structure, and the mounting portion 21 is embedded in the accommodating cavity 13 along the depth direction of the accommodating cavity 13; the mounting portion 21 is set as a cylindrical structure; the head body 1 is provided with an accommodating groove 14, and the accommodating groove 14 penetrates the accommodating cavity 13 along the depth direction The extrusion portion 22 is configured as a strip structure, and the extrusion portion 22 is snap-fitted into the accommodating groove 14; the accommodating cavity 13 and the accommodating groove 14 are arranged in sequence along the pressing direction of the head body 1, and the maximum width of the accommodating cavity 13 along the first direction is greater than the groove width of the accommodating groove 14, the first direction is perpendicular to the pressing direction of the head body 1, and the first direction is perpendicular to the depth direction of the accommodating cavity 13; the extrusion portion 22 extends along the depth direction of the accommodating cavity 13, and the first end of the extrusion portion 22 is connected to the mounting portion 21; the corner position of the second end of the extrusion portion 22 is provided with a chamfered structure or a rounded structure; the adapter 2 is provided with a dislocation screw hole; the dislocation screw hole is used to lock the second threaded connection piece, so as to push the adapter 2 to separate from the head body 1 through the abutment between the second threaded connection piece and the head body 1; the head body 1 is provided with a connecting screw hole 24; the connecting screw hole 24 is used to lock the first threaded connection piece 3, so as to lock the adapter 2 on the head body 1 through the first threaded connection piece 3; the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole 24; the head body 1 is provided with a glue overflow groove 15, the glue overflow groove 15 is connected with the membrane sealing part 11, and the glue overflow groove 15 is used to collect the sealant overflowing from the membrane sealing part 11.

[0096] The present application also provides a battery packaging device. Figures 3 to 5 The battery packaging device includes the head structure in any of the above embodiments.

[0097] For the specific structure of the head structure, please refer to the above embodiments. Since the battery packaging device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, that is, the slot print on the traditional head is replaced by a detachable adapter 2, and the sealant is squeezed and pushed during the pressing process of the target battery, so that the sealant at the junction of the soft-pack film material and the electrode of the target battery is fully filled; and when the adapter 2 has a certain degree of wear after multiple packaging operations, it is only necessary to replace the new adapter 2 alone, and there is no need to replace the head structure as a whole, thereby eliminating the time-consuming and complex operations such as disassembly, reinstallation, debugging, and quality confirmation of the head structure, effectively avoiding the problem of a significant increase in material, manpower and time costs caused by the overall replacement of the head structure, and ensuring production efficiency.

[0098] In some embodiments, reference Figures 3 to 5 The battery packaging device further includes a heating element 4 and a driving device (not shown in the figure), and the heating element 4 and the driving device are connected to the head body 1;

[0099] The driving device is used to drive the sealing head body 1 to move so as to perform a compression sealing operation on the target battery; the heating element 4 is used to transfer heat to the sealing head body 1 so as to heat the target battery.

[0100] By providing a driving device, the sealing head body 1 can be conveniently driven to press the target battery; wherein the driving device can be in the form of electric drive, hydraulic drive, pneumatic drive, etc., which is not limited here.

[0101] By setting the heating element 4, when the film sealing portion 11 of the head body 1 is pressed onto the soft-package film material of the target battery and the electrode sealing groove 12 of the head body 1 is pressed onto the electrode ear of the target battery, the heating element 4 can perform a heating operation to transfer heat to the target battery through the head body 1, so that the soft-package film material and sealant of the target battery are melted and bonded at high temperature, thereby completing the sealing operation of the target battery in a heat-sealed manner.

[0102] In some embodiments, reference Figures 3 to 5 , one side of the heating element 4 is connected to the head body 1, and the other side of the heating element 4 is connected to the driving device;

[0103] The battery packaging device further includes a heat insulating member 5 , which is disposed between the heating element 4 and the driving device.

[0104] By providing the heat insulating member 5, the heat conduction between the heating element 4 and the driving device can be blocked, so as to prevent the heat generated by the heating element 4 from being excessively transferred to the driving device and causing overheating and damage of the driving device. This can protect the driving device and ensure the operating stability and reliability of the driving device.

[0105] In some embodiments, reference Figures 3 to 5 The battery packaging device includes a heating element 4, a driving device and a head structure in any of the above embodiments. The battery packaging device also includes a heating element 4 and a driving device. The heating element 4 and the driving device are connected to the head body 1; the driving device is used to drive the head body 1 to move so as to perform a press-sealing operation on the target battery; the heating element 4 is used to transfer heat to the head body 1 so as to heat the target battery; one side of the heating element 4 is connected to the head body 1, and the other side of the heating element 4 is connected to the driving device; the battery packaging device also includes a heat insulating member 5, which is arranged between the heating element 4 and the driving device.

[0106] It should be noted that the other contents of the head structure and battery packaging device disclosed in this application can be found in the prior art and will not be described in detail here.

[0107] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A head structure, characterized in that: The head structure comprises: A sealing head body, wherein the sealing head body has a film sealing portion and an electrode sealing groove which are adjacently arranged, wherein the film sealing portion is used to press the soft package film material of the target battery, and the electrode sealing groove is used to press the tab of the target battery; An adapter is detachably connected between the film body sealing portion and the electrode sealing groove, and is used to push the sealant between the soft-pack film material and the electrode ear to a preset sealing area.

2. The head structure according to claim 1, characterized in that: The adapter is locked on the head body through a first threaded connection.

3. The head structure according to claim 1, characterized in that: The surface of the head body is provided with a receiving cavity; the adapter has a mounting portion and an extrusion portion, the mounting portion is embedded in the receiving cavity, and the extrusion portion is used to push the sealant between the soft-coated membrane material and the pole ear to the preset sealing area.

4. The head structure according to claim 3, characterized in that: An arc-shaped connecting portion is provided at the connection between the mounting portion and the extruding portion.

5. The head structure according to claim 3, characterized in that: The depth direction of the accommodating cavity is perpendicular to the pressing direction of the head body, the mounting portion is configured as a columnar structure, and the mounting portion is embedded in the accommodating cavity along the depth direction of the accommodating cavity.

6. The end cap structure according to claim 5, characterized in that: The mounting portion is configured as a cylindrical structure.

7. The end cap structure according to claim 5, characterized in that: The sealing head body is provided with a receiving groove, and the receiving groove is arranged to penetrate along the depth direction of the receiving cavity. The extrusion part is arranged as a strip structure, and the extrusion part is snap-fitted in the receiving groove.

8. The end cap structure according to claim 7, characterized in that: The accommodating cavity and the accommodating groove are arranged in sequence along the pressing direction of the head body, the maximum width of the accommodating cavity along the first direction is greater than the groove width of the accommodating groove, the first direction is perpendicular to the pressing direction of the head body, and the first direction is perpendicular to the depth direction of the accommodating cavity.

9. The end cap structure according to claim 7, characterized in that: The extrusion portion extends along the depth direction of the accommodating cavity, and a first end of the extrusion portion is connected to the mounting portion.

10. The end cap structure according to claim 9, characterized in that: A chamfered structure or a rounded structure is provided at a corner position of the second end of the extrusion portion.

11. The end cap structure according to claim 1, characterized in that: The adapter is provided with a dislocation screw hole; the dislocation screw hole is used to lock the second threaded connector, so as to push the adapter to separate from the head body through the abutment between the second threaded connector and the head body.

12. The end cap structure according to claim 11, characterized in that: The adapter is provided with a connecting screw hole; the connecting screw hole is used to lock the first threaded connector, so as to lock the adapter to the head body through the first threaded connector; the aperture of the dislocation screw hole is larger than the aperture of the connecting screw hole.

13. The end cap structure according to any one of claims 1 to 12, characterized in that: The sealing head body is provided with a glue overflow groove, the glue overflow groove is communicated with the membrane body sealing part, and the glue overflow groove is used to collect the sealant overflowing from the membrane body sealing part.

14. A battery packaging device, characterized in that: The battery packaging device comprises a sealing head structure as claimed in any one of claims 1 to 13.

15. The battery packaging device according to claim 14, characterized in that: The battery packaging device further includes a heating element and a driving device, wherein the heating element and the driving device are connected to the sealing head body; The driving device is used to drive the sealing head body to move so as to perform a press-sealing operation on the target battery; The heating element is used to transfer heat to the header body to heat the target battery.

16. The battery packaging device according to claim 15, characterized in that: One side of the heating element is connected to the head body, and the other side of the heating element is connected to the driving device; The battery packaging device further includes a heat insulating member, which is disposed between the heat generating body and the driving device.

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