Assembly fixing device and assembly method thereof

Abstract

The invention belongs to the technical field of soft package batteries, and particularly relates to an assembling and fixing device and an assembling method thereof.The assembling and fixing device comprises a shell positioning plate and tab positioning blocks, a positioning groove is formed in the shell positioning plate and used for containing a soft package shell, and the tab positioning blocks are arranged on the two sides of the shell positioning plate and used for positioning the soft package shell. The two tab positioning blocks are respectively provided with a tab groove, and the two tab grooves are arranged at an angle of 180 degrees; the assembling and fixing device is matched with the soft package shell for use, the soft package shell, a battery cell and a packaging station are fixed on the same circle center, and positive and negative tabs are fixed to form 180 degrees, so that errors caused by hand trembling and subconscious actions are avoided, the difficulty of manual operation is reduced, the assembling time is greatly shortened, the assembling efficiency is improved, and the production cost is reduced.

Description

[0001] This application is a divisional application of a patent application with an application date of December 15, 2021, application number 202111533829.4, and invention name “A soft-pack shell, assembly and fixing device and assembly method thereof”. Technical Field

[0002] The present invention belongs to the technical field of soft-pack batteries, and in particular relates to an assembly and fixing device and an assembly method thereof. Background Art

[0003] With the popularity of digital devices such as TWS headphones, button batteries have been widely used in various devices, and the requirements for their performance are getting higher and higher. Due to the small size of button batteries, the shell of soft-pack batteries is generally rectangular. The rectangular shell makes the soft-pack shell small, but it is not convenient for operation and production. When the aluminum-plastic film is folded in half, the parallelism of the upper and lower packaging shells cannot be guaranteed, and it is easy to be misaligned. Specifically, the finished product has an excessively wide or too small inner unsealed area and a poor appearance. During the soft-pack packaging, the aluminum-plastic film has severe heat radiation, which leads to adhesion of the aluminum-plastic film, difficulty in positioning, and difficulty in injecting liquid, which seriously reduces the production efficiency and quality rate.

[0004] When button-type batteries are packaged, the seal is also circular. The soft-pack shell is small, and it is difficult to position the two concentrically. In addition, the positive and negative pole ears need to be kept at a 180° angle, which is not convenient for operation and production. This is a difficulty in the production process of soft-pack button batteries. If the package is a battery pit and the packaging tooling is not concentric, the packaging tooling and the battery will be eccentrically sealed, causing the internal deformation of the shell to exceed the reasonable deformation rate, and there is a risk of shell damage, which poses a great safety hazard. Summary of the invention

[0005] One of the purposes of the present invention is to provide a soft-pack shell to address the deficiencies in the prior art, thereby improving the parallelism of the aluminum-plastic film when it is folded in half, eliminating the problems of heat radiation and shell adhesion caused by the shell being too small, providing stable and effective positioning and support for soft-pack battery cell packaging and subsequent processes, and improving production efficiency and quality rate.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a soft package shell, comprising a first shell and a second shell, the first shell comprising a first substrate, a first battery cell and a second substrate, the first substrate and the second substrate respectively shrink in the direction close to the first battery cell and are respectively connected to the first battery cell, the second shell comprises a third substrate, a second battery cell and a fourth substrate, the third substrate and the fourth substrate respectively shrink in the direction close to the second battery cell and are respectively connected to the second battery cell, the first shell and the second shell are symmetrically arranged, the first battery cell and / or the second battery cell are recessed in the middle and form a first convex portion extending outward, and the first convex portion is used to install the battery cell.

[0007] Furthermore, the first shell and the second shell are integrally formed.

[0008] Furthermore, the first convex portion is cylindrical.

[0009] Furthermore, both side surfaces of the first battery cell and the second battery cell are arc surfaces.

[0010] Furthermore, a second convex portion is provided on the first substrate and / or the second substrate, and a side of the second convex portion close to the first convex portion is sloped.

[0011] Furthermore, a plurality of linearly arranged cutouts are provided at the connection between the first shell and the second shell, and the plurality of cutouts are arranged at equal intervals.

[0012] Furthermore, the first substrate includes a first square body and a first trapezoidal body formed by shrinking the first square body toward the first battery core, and the first trapezoidal body and the first battery core are fixedly connected.

[0013] Furthermore, the fourth base body includes a second square body and a second trapezoidal body formed by shrinking the second square body toward the second battery core body, and the second trapezoidal body and the second battery core body are fixedly connected.

[0014] The second purpose of the present invention is to provide an assembly and fixing device to address the deficiencies in the prior art. The assembly and fixing device is used in conjunction with a soft-pack shell to fix the soft-pack shell, the battery cell and the packaging station on the same center of a circle, and to fix the positive and negative pole ears at 180°, thereby eliminating mistakes caused by hand tremors and subconscious movements, reducing the difficulty of manual operation, greatly reducing assembly time, improving transfer efficiency and reducing production costs.

[0015] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an assembly and fixing device, comprising: a shell positioning plate and a tab positioning block, the shell positioning plate is provided with a positioning groove, the positioning groove is used to accommodate a soft-pack shell, the tab positioning blocks are arranged on both sides of the shell positioning plate, the two tab positioning blocks are respectively provided with tab grooves, the two tab grooves are arranged at 180°, and a stop block is provided on one end face of the shell positioning plate, the stop block is used to prevent the soft-pack shell from deformation.

[0016] An assembly method for an assembly fixture comprises the following steps:

[0017] Step 1: Place the soft-pack shell with the battery cell installed inside into the assembly fixture;

[0018] Step 2: Place the positive electrode tab and the negative electrode tab into the two tab slots arranged at 180 degrees, respectively;

[0019] Step 3: Encapsulate the soft package shell;

[0020] Step 4: injecting electrolyte into the soft package shell;

[0021] Step 5: Under negative pressure conditions, the air in the soft-package shell is extracted, and the injection hole of the soft-package shell is sealed;

[0022] Step 6: Cut the soft-pack shell to obtain a button battery.

[0023] The beneficial effects of the present invention are: a soft package shell, comprising a first shell and a second shell, the first shell comprising a first substrate, a first battery cell and a second substrate, the first substrate and the second substrate respectively shrink in a direction close to the first battery cell and are respectively connected to the first battery cell, the second shell comprises a third substrate, a second battery cell and a fourth substrate, the third substrate and the fourth substrate respectively shrink in a direction close to the second battery cell and are respectively connected to the second battery cell, the first shell and the second shell are symmetrically arranged, the first battery cell and / or the second battery cell are recessed in the middle and form a first convex portion extending outward, and the first convex portion is used to install the battery cell. The present invention provides a soft-pack shell, in which the first shell and the second shell are symmetrically arranged, and when the shell is folded in half, left-right symmetry can be achieved, and the first battery cell is provided with a first and a second trumpet-shaped substrate on both sides, and the second battery cell is also provided with a third and a fourth trumpet-shaped substrate on both sides. The closer to the first battery cell, the smaller the appearance of the first and the second substrates, and the closer to the second battery cell, the smaller the appearance of the third and the fourth substrates. With this structural design, during packaging, the seal is sealed along the trumpet mouth, which will effectively increase the distance between the upper and lower seals, reduce heat radiation at the center line of the shell, eliminate the phenomenon of shell adhesion, and at the same time, it is beneficial to reduce the distance between the pole ears. When the clamp is connected to the pole ears for charging and discharging in the subsequent battery production process, the safety risks such as shell short circuit can be reduced; after the soft-pack shell is folded in half at the folding line, the appearance is flat and the consistency is high, and it can be used for finalization in the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the structural schematic diagrams of a soft package shell in Example 1 of the present invention;

[0025] Figure 2 This is a second structural schematic diagram of a soft package shell in Example 1 of the present invention;

[0026] Figure 3 for Figure 2 A local enlarged schematic diagram;

[0027] Figure 4 This is a third structural schematic diagram of a soft package shell in Example 1 of the present invention;

[0028] Figure 5 This is a fourth structural schematic diagram of a soft package shell in Example 1 of the present invention;

[0029] Figure 6 This is a schematic structural diagram of a soft package shell in Example 2 of the present invention;

[0030] Figure 7 This is a schematic structural diagram of an assembly and fixing device in Example 3 of the present invention.

[0031] Among them, 1. the first shell; 11. the first base; 111. the first square body; 112. the first trapezoidal body; 12. the first battery cell; 13. the second base; 2. the second shell; 21. the third base; 22. the second battery cell; 23. the fourth base; 231. the second square body; 232. the second trapezoidal body; 3. the first protrusion; 4. the second protrusion; 5. the cutout; 6. the shell positioning plate; 61. the positioning groove; 611. the accommodating groove; 62. the stop block; 63. the retaining edge; 7. the pole ear positioning block; 71. the pole ear groove; 8. the pole ear. DETAILED DESCRIPTION

[0032] In the description of the application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention.

[0033] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; unless otherwise specified or explained, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "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.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] To make the technical solutions and advantages of the present invention more clear, the present invention and its beneficial effects will be described in further detail below in conjunction with specific implementation methods and accompanying drawings, but the implementation methods of the present invention are not limited thereto.

[0037] Example 1

[0038] like Figure 1As shown, a soft package shell provided in this embodiment 1 includes a first shell 1 and a second shell 2, the first shell 1 includes a first substrate 11, a first battery cell 12 and a second substrate 13, the first substrate 11 and the second substrate 13 are respectively shrunk toward the direction close to the first battery cell 12 and are respectively connected to the first battery cell 12, the second shell 2 includes a third substrate 21, a second battery cell 22 and a fourth substrate 23, the third substrate 21 and the fourth substrate 23 are respectively shrunk toward the direction close to the second battery cell 22 and are respectively connected to the second battery cell 22, the first shell 1 and the second shell 2 are symmetrically arranged, the middle part of the first battery cell 12 or the second battery cell 22 is recessed, and a first convex portion 3 extending outward is formed, and the first convex portion 3 is used to install the battery cell. The present invention provides a soft-pack shell, in which the first shell 1 and the second shell 2 are symmetrically arranged, and when the shell is folded in half, left-right symmetry can be achieved. A trumpet-shaped first substrate 11 and a second substrate 13 are arranged on both sides of the first battery cell 12, and a trumpet-shaped third substrate 21 and a fourth substrate 23 are also arranged on both sides of the second battery cell. The closer to the first battery cell 12, the smaller the shape of the first substrate 11 and the second substrate 13, and the closer to the second battery cell 22, the smaller the shape of the third substrate 21 and the fourth substrate 23. With this structural design, when packaging, the seal is sealed along the trumpet mouth, which will effectively increase the distance between the upper and lower seals, reduce the heat radiation at the center line of the shell, and eliminate the phenomenon of shell adhesion. At the same time, it is beneficial to reduce the distance between the extended pole ears 8 when the upper and lower sides of the battery pit are packaged. When the clamp is connected to the pole ears 8 for charging and discharging in the subsequent battery production process, the safety risks such as shell short circuit can be reduced; after the soft-pack shell is folded in half at the folding line, the shape is flat and the consistency is high, and it can be used for finalization in the later process.

[0039] Specifically, the second substrate 13 and the third substrate 21 are symmetrically arranged, and the second substrate 13 and the third substrate 21 have larger bell mouths near the fold line, thereby increasing the length of the fold line, facilitating the vertical placement of the shell after folding, and facilitating the workstation requirements of subsequent processes such as liquid injection and testing.

[0040] Preferably, the first shell 1 and the second shell 2 are integrally formed, which reduces the production process of the soft-package shell and enhances the structural firmness of the soft-package shell.

[0041] Preferably, the first protrusion 3 is cylindrical. The first protrusion 3 is used to place the battery cell, and its shape structure is not limited to the cylindrical shape mentioned in this embodiment 1, and can also be a square or trapezoidal structure. Those skilled in the art can make appropriate selections according to actual production needs, so that the first protrusion 3 can match the shape of the battery cell.

[0042] Preferably, both sides of the first battery cell 12 and the second battery cell 22 are arc surfaces. In practical applications, the first battery cell 12 and the second battery cell 22 have the same appearance and are both arc-shaped. The arc shape is the outer arc size required before the button battery is folded. This arc is the output ear 8 during packaging. In the subsequent process, there is no need for secondary cutting at this point, which reduces the production process and improves production efficiency and quality rate.

[0043] like Figures 2-3 As shown, a second convex portion 4 is provided on the first substrate 11, and the side of the second convex portion 4 close to the first convex portion 3 is sloped. With this structural design, gas is stored in the second convex portion 4, so that no electrolyte is retained during liquid injection. At the same time, the slope design can extend the length of the second convex portion 4 as much as possible, which is conducive to eliminating heat radiation and solving the problem of shell adhesion.

[0044] Preferably, a plurality of linearly arranged cutouts 5 are provided at the connection between the first shell 1 and the second shell 2, and the plurality of cutouts 5 are arranged at equal intervals. Specifically, during the production process of the soft-package shell, a cutter is used to punch out intermittent cutouts 5 at the connection (folding position) between the first shell 1 and the second shell 2 to form a folding line, so as to facilitate the subsequent folding of the first shell 1 and the second shell 2 together.

[0045] Preferably, the first substrate 11 includes a first square body 111 and a first trapezoidal body 112 formed by shrinking the first square body 111 toward the first battery cell 12, and the first trapezoidal body 112 is fixedly connected to the first battery cell 12. The fourth substrate 23 includes a second square body 231 and a second trapezoidal body 232 formed by shrinking the second square body 231 toward the second battery cell 22, and the second trapezoidal body 232 is fixedly connected to the second battery cell 22. This structural design improves the parallelism of the aluminum-plastic film when it is folded in half, eliminates the problems of heat radiation and shell adhesion caused by a too small shell, provides stable and effective positioning and support for soft-pack battery cell packaging and subsequent processes, and improves production efficiency and quality rate.

[0046] The soft-pack shell in this embodiment 1 is preferably made of aluminum-plastic film. When or after the battery cell pit (first convex part 3) and the air bag pit (second convex part 4) are punched on the aluminum-plastic film, the shell shape is punched by the cutting die installed on the punching die or the cutting die of the post-process, so as to achieve the soft-pack shell of the desired design shape. It should be noted that the battery cell pit and the air bag pit need to be used to position the shell during punching, while avoiding scratches and other deformations on the shell.

[0047] During packaging, after placing the battery cell into the first protrusion 3, the soft-package shell is folded left and right along the folding line with the intermittent cutout 5 to form a Figure 5 The shell shape shown has a liquid injection hole after the initial packaging. After rotating and inverting, the electrolyte can be injected through the liquid injection hole. This shape can effectively increase the single injection volume and facilitate operation.

[0048] Example 2

[0049] like Figure 6 As shown, different from the embodiment, this embodiment 2 provides a soft-pack shell, in which the first battery cell 12 and the second battery cell 22 are respectively provided with a first protrusion 3, and the two first protrusions 3 are arranged correspondingly, and the first substrate 11 and the fourth substrate 23 are respectively provided with a second protrusion 4, and the two second protrusions 4 are arranged correspondingly.

[0050] The other structures are the same as those in Embodiment 1 and will not be described in detail here.

[0051] Example 3

[0052] like Figure 7 As shown, an assembly and fixing device provided in this embodiment 3 is used to install the soft-pack shell in embodiment 1 or embodiment 2, including: a shell positioning plate 6 and a tab positioning block 7, a positioning groove 61 is provided on the shell positioning plate 6, the positioning groove is used to accommodate the soft-pack shell, and a receiving groove 611 is provided in the positioning groove 61, and the receiving groove 611 is used to accommodate the first convex part 3 of the soft-pack shell, and the tab positioning blocks 7 are arranged on both sides of the shell positioning plate 6, and the two tab positioning blocks 7 are respectively provided with tab grooves 71, and the two tab grooves 71 are arranged at 180 degrees, and a stop block 62 is provided on one end face of the shell positioning plate 6, and the stop block 62 is used to prevent the soft-pack shell from being deformed. In this embodiment 3, the width of the tab groove 71 is 0.3mm larger than the width of the tab 8. This structural design can not only ensure that the tab 8 can be placed in the tab groove 71 without damage, but also play the role of positioning the tab 8.

[0053] Specifically, the receiving groove 611 is a truncated cone structure, the upper diameter of which is 0.2 mm larger than the diameter of the first protrusion 3, and the lower diameter is equal to the diameter of the first protrusion 3. This structural design facilitates the placement of the first protrusion 3 into the receiving groove 611 and can fix the first protrusion 3 in the receiving groove 611. In practical applications, two retaining edges 63 are provided on the housing positioning plate 6, and the two retaining edges 63 are attached to the two side bevels of the first substrate 11 and the fourth substrate 23 that are overlapped after folding, and the inclination angles of the two retaining edges 63 are consistent with the inclination angles of the bevels of the first substrate 11 and the fourth substrate 23, and are both set at an angle of 45°.

[0054] An assembly method for an assembly fixture comprises the following steps:

[0055] Step 1: Place the soft-pack shell with the battery cell installed inside into the assembly fixture;

[0056] Step 2: Place the positive electrode tab 8 and the negative electrode tab 8 into two tab slots 71 arranged at 180 degrees, respectively;

[0057] Step 3: Encapsulate the soft package shell;

[0058] Step 4: injecting electrolyte into the soft package shell;

[0059] Step 5: Under negative pressure conditions, the air in the soft-package shell is extracted, and the injection hole of the soft-package shell is sealed;

[0060] Step 6: Cut the soft-pack shell to obtain a button battery.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0062] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An assembly fixing device, characterized in that: include: A shell positioning plate (6) and a tab positioning block (7), wherein the shell positioning plate (6) is provided with a positioning groove (61), and the positioning groove (61) is used to accommodate the soft-pack shell, and the tab positioning blocks (7) are arranged on both sides of the shell positioning plate (6), and the two tab positioning blocks (7) are respectively provided with tab grooves (71), and the two tab grooves (71) are arranged at 180 degrees.

2. An assembly and fixing device according to claim 1, characterized in that: A stop block (62) is provided on one end surface of the shell positioning plate (6), and the stop block (62) is used to prevent the soft package shell from being deformed.

3. An assembly method for an assembly fixture as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: Step 1: Place the soft-pack shell with the battery cell installed inside into the assembly fixture; Step 2: Place the positive electrode tab and the negative electrode tab into two tab slots (71) arranged at 180 degrees, respectively; Step 3: Encapsulate the soft package shell; Step 4: injecting electrolyte into the soft package shell; Step 5: Under negative pressure conditions, the air in the soft-package shell is extracted, and the injection hole of the soft-package shell is sealed; Step 6: Cut the soft-pack shell to obtain a button battery.

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