Flexible package battery and manufacturing method thereof

Abstract

The invention relates to the technical field of batteries, in particular to a flexible package battery and a manufacturing method thereof. The flexible package battery comprises a packaging frame and a plastic film shell, the packaging frame is provided with a frame and a first tab, and the first tab is used for being connected with a second tab of a battery pole group. The plastic film shell comprises a groove for accommodating the battery pole group and a packaging edge, and the packaging edge is used for being connected with the frame. When the plastic film shell is applied, the packaging edge of the plastic film shell can be attached and connected along the frame outline of the packaging frame, namely, the packaging edge is completely attached to the surface of the frame, so that the hot melting packaging surface of the plastic film shell does not have wrinkles, the problem of untight sealing is avoided, and the sealing reliability is improved. And the groove wraps and seals the battery pole group from two sides, so that the battery pole group and the second tab are sealed and protected.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to soft-package batteries and methods for manufacturing the same. Background Art

[0002] With the rapid development of electronic devices, especially the popularity of portable electronic devices and electric vehicles, the requirements for battery energy density, safety, and reliability are increasing. Soft-package batteries, due to their advantages such as light weight, flexible shape, and high energy density, are gradually becoming an important development direction in the battery field. However, the manufacturing process of soft-package batteries still faces some technical challenges, especially in the packaging process and sealing reliability.

[0003] Traditional soft-pack batteries typically use aluminum-plastic film as the outer shell material, which is sealed by heat-melting the film to the tab tape on the tabs. However, in this packaging process, after the edges of the aluminum-plastic film on both sides of the electrode assembly are heat-fused to the tab tape, the thickness of the tab tape causes uneven wrinkles in the aluminum-plastic film after packaging. These wrinkles, in turn, lead to a poor seal in the soft-pack battery. This not only affects the battery's appearance but can also lead to electrolyte leakage, performance degradation, and even safety hazards, compromising the battery's long-term reliability. Summary of the Invention

[0004] In view of this, the present application provides a soft-package battery and a method for manufacturing the same. By introducing a packaging frame having a skeleton layer and a hot-melt layer, combined with the groove design of the plastic film shell, the sealing and protection effects of the battery pole group and the pole ears are improved, and the wrinkle problem during the packaging process can be effectively avoided.

[0005] In a first aspect, the present application provides a soft-package battery, comprising: a packaging frame having a frame and a first pole ear, wherein the first pole ear is used to connect to the second pole ear of a battery pole group; a plastic film shell, comprising a packaging edge and a groove for accommodating the battery pole group, wherein the packaging edge is used to connect to the frame.

[0006] In combination with the first aspect, in a possible implementation, the frame includes a skeleton layer and at least two hot melt layers, and the hot melt layer, the skeleton layer and the hot melt layer are arranged in sequence along the thickness direction of the frame; along the width direction of the skeleton layer, the first tab is passed through the skeleton layer.

[0007] In combination with the first aspect, in a possible implementation, the melting point of the skeleton layer is greater than the melting point of the hot-melt layer.

[0008] In combination with the first aspect, in a possible implementation, an orthographic projection of the hot melt layer perpendicular to the surface coincides with an orthographic projection of the skeleton layer perpendicular to the surface.

[0009] In combination with the first aspect, in a possible implementation, the thickness t of the skeleton layer satisfies at least one of the following: t≥0.5mm; t=battery electrode group thickness T1 / 0.95-groove depth T2*2-hot melt layer thickness T3*2, and the hot melt layer thickness T3≥0.15mm.

[0010] In combination with the first aspect, in a possible implementation, the frame includes at least 4 support plates, which are interconnected to form the frame, and the 4 support plates include a connecting support plate and at least 1 tab support plate. The first tab is arranged on the tab support plate, and the width of the tab support plate is or is greater than the width of the connecting support plate.

[0011] In combination with the first aspect, in a possible implementation, the number of the first electrode tabs is two, and the two first electrode tabs are respectively located on the same side or opposite sides of the frame.

[0012] In combination with the first aspect, in a possible implementation, the width of the connecting support plate is greater than or equal to 3 mm.

[0013] With reference to the first aspect, in a possible implementation, the thickness t1 of the first electrode tab is ≥0.1 mm, and the width w3 of the first electrode tab is ≥5 mm.

[0014] In combination with the first aspect, in a possible implementation, the battery electrode group includes a positive electrode sheet, a negative electrode sheet, and a solid electrolyte membrane that are stacked.

[0015] In a second aspect, the present application provides a manufacturing method for the aforementioned soft-package battery, comprising: placing a packaging frame on an assembly tool; the packaging frame has a frame and a first pole ear; placing a battery pole group within an enclosed area of the packaging frame; connecting the first pole ear and the second pole ear of the battery pole group to each other; placing a plastic film shell having a groove and a packaging edge on both sides of the battery pole group, and aligning the battery pole group and the groove; aligning the packaging edge and the packaging frame, and connecting the packaging edge and the packaging frame to each other.

[0016] In combination with the second aspect, in a possible implementation, the frame includes a skeleton layer and at least two hot melt layers, and the hot melt layer, the skeleton layer and the hot melt layer are arranged in sequence along the thickness direction of the frame; along the width direction of the skeleton layer, the first tab is penetrated into the skeleton layer, and the melting point of the skeleton layer is greater than the melting point of the hot melt layer; the packaging edge and the packaging frame are connected to each other including: positioning the packaging edge and the hot melt layer relative to each other and fixing them with a clamp; extruding the packaging edge and the hot melt layer at any value between 65kpa and 80kpa and any value between 30s and 60s; hot-melt fusing the packaging edge and the hot melt layer at any value between 0.5Mpa and 0.6Mpa, any value between 190℃ and 195℃, and any value between 5s and 7s.

[0017] When used, the sealing edge of the plastic film shell can be connected to the frame contour of the packaging frame, that is, the sealing edge is completely in contact with the frame surface. Therefore, the hot-melt sealing surface of the plastic film shell will not wrinkle, avoiding the problem of loose sealing and improving the sealing reliability. The groove wraps around the sealed battery electrode group from both sides, achieving sealing and protection for the battery electrode group and the second terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows a schematic structural diagram of a packaging frame provided by an embodiment of the present application, in which two tabs are provided on the same side.

[0019] Figure 2 Shown is a schematic diagram of the frame structure of the packaging frame.

[0020] Figure 3 Shown Figure 1 Schematic diagram of part of the structure.

[0021] Figure 4 The following is an example of an embodiment of the present application. Figure 1 A schematic structural diagram of an electrode group is mounted in the packaging frame of the embodiment.

[0022] Figure 5 Shown is a structural schematic diagram of a plastic film housing provided in another embodiment of the present application.

[0023] Figure 6 Shown is a schematic structural diagram of a soft-package battery after assembly provided in one embodiment of the present application.

[0024] Figure 7 FIG2 is a schematic structural diagram of two tabs provided by an embodiment of the present application, wherein the two tabs are located on opposite sides of the packaging frame.

[0025] Figure 8 The following is an example of an embodiment of the present application. Figure 7 A schematic structural diagram of an electrode group is mounted in the packaging frame of the embodiment.

[0026] Figure 9 Shown is a schematic structural diagram of a soft-package battery after assembly provided by another embodiment of the present application.

[0027] Figure 10 Shown is a schematic diagram of the steps of a method for manufacturing a soft-package battery provided in one embodiment of the present application.

[0028] Figure 11 Shown is a schematic diagram of the steps of a method for manufacturing a soft-package battery provided in another embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0030] Figure 1 The figure shows a schematic structural diagram of a packaging frame provided by an embodiment of the present application, in which two tabs are provided on the same side. Figure 2 Shown is a schematic diagram of the frame structure of the packaging frame. Figure 3 Shown Figure 1 Schematic diagram of part of the structure. Figure 4 The following is an example of an embodiment of the present application. Figure 1 A schematic structural diagram of an electrode group is mounted in the packaging frame of the embodiment. Figure 5 Shown is a structural schematic diagram of a plastic film housing provided in another embodiment of the present application. Figure 6 Shown is a schematic structural diagram of a soft-package battery after assembly provided in one embodiment of the present application. Figure 7 FIG2 is a schematic structural diagram of two tabs provided by an embodiment of the present application, wherein the two tabs are located on opposite sides of the packaging frame. Figure 8 The following is an example of an embodiment of the present application. Figure 7 A schematic structural diagram of an electrode group is mounted in the packaging frame of the embodiment. Figure 9 Shown is a schematic structural diagram of a soft-package battery after assembly provided by another embodiment of the present application.

[0031] The present application provides a soft package battery, such as Figure 1 、 2As shown in Figures 3, 4, 5, 6, 7, 8, and 9, in one embodiment, the soft-package battery includes a packaging frame 2 and a plastic film shell 3. The packaging frame 2 has a frame and a first electrode tab 4, which is used to connect to the second electrode tab 101 of the battery electrode group 1. The plastic film shell 3 includes a groove 301 and a packaging edge 302. The groove 301 is used to accommodate the battery electrode group 1, and the packaging edge 302 is used to connect to the frame.

[0032] In this embodiment, the sealing edge 302 of the plastic film housing 3 can be attached to the contour of the packaging frame 2, that is, the sealing edge 302 is completely in contact with the frame surface. Therefore, the hot-melt sealing surface of the plastic film housing 3 is free of wrinkles, avoiding the problem of poor sealing and improving sealing reliability. The groove 301 encloses and seals the battery electrode assembly 1 from both sides, thereby sealing and protecting the battery electrode assembly 1 and the second electrode tab 101.

[0033] In one embodiment, if Figure 2 As shown, the frame includes at least four support plates, which are interconnected to form a frame. The four support plates include a connecting support plate 211 and at least one tab support plate 210 . Figure 2 There is one tab support plate 210 and three connecting support plates 211. The first tab 4 is mounted on the tab support plate 210. The width of the tab support plate 210 is greater than or equal to the width of the connecting support plate 211. In use, the four support plates form a frame that encloses and protects the battery electrode group 1. The tab support plate 210 is used to connect and protect the first tab 4. The width of the tab support plate 210 is greater than that of the connecting support plate 211, ensuring sufficient width to support and connect the first tab 4.

[0034] Specifically, the width of the connecting support plate 211 is greater than or equal to 3 mm to ensure that the frame has sufficient strength.

[0035] In one embodiment, if Figure 3 、 6 As shown in FIG7 , there are two first tabs 4 , and the two first tabs 4 are located on the same side or opposite sides of the frame. For example, the two first tabs 4 are respectively a positive tab and a negative tab. Figures 1 to 4 and Figure 6 In an embodiment, the positive electrode tab and the negative electrode tab are located on the same side of the frame, Figures 7-9 In an embodiment, the positive electrode tab and the negative electrode tab are located on opposite sides of the frame.

[0036] In one embodiment, if Figure 3As shown, the frame includes a skeleton layer 201 and at least two hot-melt layers 202. The hot-melt layer 202, the skeleton layer 201, and the hot-melt layer 202 are sequentially arranged along the thickness direction of the frame. The first electrode tab 4 is inserted through the skeleton layer 201 along the width direction of the skeleton layer 201. The skeleton layer 201 can provide protection for the first electrode tab 4. The melting point of the skeleton layer 201 is greater than that of the hot-melt layer 202 to ensure that the skeleton layer 201 will not soften or be damaged when the packaging edge 302 and the hot-melt layer 202 are heat-fused together.

[0037] When this embodiment is used, the hot melt layer 202 can further improve the stability of the hot melt connection. The first electrode tab 4 is arranged between the two hot melt layers 202, which can prevent the first electrode tab 4 from causing the packaging edge 302 to bulge, so that the hot melt layer 202 is completely in contact with the packaging edge 302 of the plastic film shell 3. In addition, the skeleton layer 201 not only provides a frame support for the entire soft-package battery, but also protects the electrode group 1 and the first electrode tab 4. The hot melt layer 202 protects the first electrode tab 4 from both sides.

[0038] In one embodiment, when preparing the plastic film shell 3, the aluminum-plastic film is pressed, and the uncollapsed part forms a packaging edge 302, and the collapsed part is punched into to form a rectangular groove 301 to accommodate the battery pole group 1. The packaging edge 302 is used to fuse with the hot melt layer 202. The first pole ear 4 is arranged between the two hot melt layers 202 and passes through the skeleton layer 201 and then connected to the second pole ear 101. The number of the first pole ears 4 is multiple, and the multiple first pole ears 4 include positive pole ears and negative pole ears, all of which are arranged in the skeleton layer 201. The two plastic film shells 3 are covered on both sides of the battery pole group 1, and after hot melt sealing, a Figure 6 This flexible package battery structure. In use, the grooves 301 protect the battery electrode assembly 1, while the heat-melting action of the heat-melting layer 202 strengthens the connection between the frame and the plastic film housing 3. Both the positive and negative tabs are inserted through the skeleton layer 201, eliminating any uneven surface features on the heat-melting layer 202 and preventing wrinkles in the plastic film housing 3 after heat-melting. Furthermore, the skeleton layer 201 effectively protects the positive and negative tabs.

[0039] In one embodiment, if Figure 3 As shown, part of the first tab 4 is located within the enclosed area of the packaging frame 2 to form a first welding area 401, and the first welding area 401 is used to be welded to the second tab 101 of the battery electrode group 1. Part of the first tab 4 is located outside the enclosed area to form a second welding area 402, and the second welding area 402 is used to be welded to the electrode.

[0040] In one embodiment, the two side surfaces of the first pole ear 4 abut against the hot melt layer 202, thereby preventing the hot melt layer 202 from collapsing at the position of the first pole ear 4 after the hot melt layer 202 and the packaging edge 302 are fused with each other, further avoiding the formation of wrinkles at the first pole ear 4 of the plastic film shell 3 and the risk of poor sealing.

[0041] In one embodiment, various portions of the hot melt layer 202 away from the first electrode tab 4 are located on the same plane, further preventing wrinkles from forming after the hot melt layer 202 and the packaging edge 302 are fused together.

[0042] In one embodiment, referring to Figure 3 The orthographic projection of the hot melt layer 202 perpendicular to the surface coincides with the orthographic projection of the skeleton layer 201 perpendicular to the surface, that is, the area of the hot melt layer 202 is the same as the area of the skeleton layer 201, thereby avoiding the presence of protruding structures on the four edges of the packaging frame 2, and making the side surface of the overall structure after the plastic film shell 3 and the hot melt layer 202 are bonded together flat, thereby improving the structural compactness and structural consistency after the packaging frame 2 and the plastic film shell 3 are connected.

[0043] Specifically, in one embodiment, the thickness t of the skeleton layer 201 satisfies at least one of the following conditions: The first type: t≥0.5 mm, which can ensure that the skeleton layer 201 has sufficient thickness to accommodate the first electrode tab 4 .

[0044] The second type: t = thickness of battery electrode group 1 T1 / 0.95 - depth of groove 301 T2*2 - thickness of hot melt layer 202 T3*2, thickness of hot melt layer 202 T3 ≥ 0.15 mm, so that the thickness t of skeleton layer 201 is correlated with the thickness of battery electrode group 1, depth of groove 301, and thickness of hot melt layer 202.

[0045] Specifically, in one embodiment, the width w1 of the tab support plate 210 satisfies: w1≥the width w2 of the connecting support plate 211, w2≥3mm. Figure 2 The skeleton layer 201 is rectangular, and the first tab 4 is located on the short side of the skeleton layer 201. Therefore, the width w1 of the short side of the skeleton layer 201 is ≥ the width w2 of the long side of the skeleton layer 201. The size limit of w1 ensures that the width w1 of the tab support plate 210 where the first tab 4 is located is large enough to ensure sufficient area to stably support and connect the first tab 4.

[0046] Specifically, the thickness t1 of the first electrode tab 4 is ≥0.1 mm, and t1 is less than the thickness t of the skeleton layer 201 , and the width w3 of the first electrode tab 4 is ≥5 mm, so as to ensure that the first electrode tab 4 can be inserted into the skeleton layer 201 .

[0047] In one embodiment, the battery electrode group 1 includes a stacked positive electrode sheet, a negative electrode sheet, and a solid electrolyte membrane. There are multiple positive electrode sheets and multiple negative electrode sheets, and the positive electrode sheets and the negative electrode sheets are stacked alternately.

[0048] Figure 10 The figure shows a schematic diagram of the steps of a method for manufacturing a soft-package battery provided in one embodiment of the present application. The present application also provides a method for manufacturing the soft-package battery. In one embodiment, as shown in FIG. Figure 10 As shown, the production method includes: Step 110 : Place the packaging frame 2 on an assembly tool. The packaging frame 2 has a frame and a first tab 4 .

[0049] Step 120 : placing the battery electrode group 1 into the enclosed area of the packaging frame 2 .

[0050] Step 130 : Connect the first electrode tab 4 and the second electrode tab 101 of the battery electrode group 1 to each other.

[0051] Step 140 : placing the plastic film housing 3 having the groove 301 and the packaging edge 302 on both sides of the battery electrode group 1 , and aligning the battery electrode group 1 and the groove 301 .

[0052] Step 150 : Align the packaging edge 302 and the packaging frame 2 , and connect the packaging edge 302 and the packaging frame 2 to each other.

[0053] This manufacturing method achieves a tight connection between the packaging frame 2 and the plastic film housing 3 through hot-melt technology, improving the battery's packaging effect and structural stability, making it suitable for the production of soft-package batteries. In batteries manufactured using this method, the packaging edge 302 of the plastic film housing 3 can be connected along the frame contour of the packaging frame 2, that is, the packaging edge 302 completely conforms to the frame surface. Therefore, the hot-melt sealing surface of the plastic film housing 3 is wrinkle-free, avoiding the problem of poor sealing and improving sealing reliability. The groove 301 encloses and seals the battery electrode assembly 1 from both sides, achieving sealing and protection for the battery electrode assembly 1 and the second electrode tab 101.

[0054] Figure 11 The figure shows a schematic diagram of the steps of a method for manufacturing a soft-package battery provided by another embodiment of the present application. In one embodiment, the frame includes a skeleton layer 201 and at least two hot-melt layers 202. The hot-melt layer 202, the skeleton layer 201, and the hot-melt layer 202 are sequentially arranged along the thickness direction of the frame; along the width direction of the skeleton layer 201, the first tab 4 is penetrated by the skeleton layer 201, and the melting point of the skeleton layer 201 is greater than the melting point of the hot-melt layer 202. Figure 11 As shown, the step 150 of connecting the packaging edge 302 and the packaging frame 2 to each other includes: Step 151: Position the packaging edge 302 and the hot melt layer 202 relative to each other and fix them with a clamp. In this step, the packaging edge 302 and the hot melt layer 202 are positioned relative to each other so that the edges of the packaging edge 302 and the hot melt layer 202 are aligned with each other.

[0055] Step 152 : Extrude the packaging edge 302 and the hot melt layer 202 at a pressure ranging from 65 kPa to 80 kPa and a pressure ranging from 30 s to 60 s.

[0056] Step 153 , performing heat-melting fusion bonding on the packaging edge 302 and the hot-melt layer 202 at a pressure ranging from 0.5 MPa to 0.6 MPa, a pressure ranging from 190° C. to 195° C., and a pressure ranging from 5 seconds to 7 seconds.

[0057] When this embodiment is used, the first tab 4 is inserted into the skeleton layer 201 between the two hot-melt layers 202, allowing the hot-melt layer 202 to completely fit the packaging edge 302 of the plastic film shell 3. After the packaging edge 302 and the hot-melt layer 202 are fused together, wrinkles will not appear in the hot-melt packaging area of the plastic film shell 3, avoiding the risk of poor sealing and improving sealing reliability. In addition, the skeleton layer 201 not only provides a frame support for the entire soft-package battery, but also protects the battery electrode group 1 and the first tab 4. The hot-melt layer 202 protects the first tab 4 from both sides. The groove 301 wraps and seals the battery electrode group 1 from both sides, providing a containment, sealing and protective function. The finished battery packaging edge 302 and the hot-melt layer 202 have neat edges after sealing, and the extrusion and hot-melt conditions can achieve a good hot-melt effect.

[0058] In one embodiment, referring to Figures 1 to 6 There are multiple first electrode tabs 4, and the multiple first electrode tabs 4 are respectively positive electrode tabs and negative electrode tabs. When the positive electrode tab and the negative electrode tab are located on the same side of the packaging frame, in step 152, they are extruded at 80 kPa for 30 seconds, and in step 153, they are hot-melted under the conditions of 0.5 MPa, 190°C, and 5 seconds.

[0059] In one embodiment, referring to Figures 1 to 6 When the positive and negative tabs are located on the same side of the packaging frame, they are extruded at 80 kPa for 30 seconds in step 152, and are hot-melted at 0.5 MPa, 190° C., and 6 seconds in step 153.

[0060] In one embodiment, referring to Figures 1 to 6 When the positive and negative tabs are located on the same side of the packaging frame, they are extruded at 80 kPa for 30 seconds in step 152, and are hot-melted at 0.5 MPa, 190°C, and 7 seconds in step 153.

[0061] In one embodiment, referring to Figures 7-9When the positive electrode ear and the negative electrode ear are located on opposite sides of the packaging frame, in step 152, they are extruded at 65 kPa for 60 seconds, and in step 153, they are hot-melted at 0.6 MPa, 195°C, and 5 seconds.

[0062] In one embodiment, referring to Figures 7-9 When the positive electrode tab and the negative electrode tab are located on opposite sides of the packaging frame, in step 152, they are extruded at 65 kPa for 60 seconds, and in step 153, they are hot-melted at 0.6 MPa, 195° C., and 6 seconds.

[0063] In one embodiment, referring to Figures 7-9 When the positive and negative tabs are located on opposite sides of the packaging frame, they are extruded at 65 kPa for 60 seconds in step 152, and hot-melted at 0.6 MPa, 195° C., and 7 seconds in step 153.

[0064] The basic principles of this application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to being implemented using the above specific details.

[0065] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0066] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0067] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be applied in the widest sense consistent with the principles and novel features of the present invention.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A soft package battery, characterized in that: include: A packaging frame (2), the packaging frame (2) having a frame and a first pole tab (4), the first pole tab (4) being used to connect to a second pole tab (101) of a battery pole group (1); The plastic film shell (3) comprises a packaging edge (302) and a groove (301) for accommodating the battery electrode group (1), wherein the packaging edge (302) is used to be connected to the frame.

2. The soft package battery according to claim 1, characterized in that The frame comprises a skeleton layer (201) and at least two hot-melt layers (202), wherein the hot-melt layer (202), the skeleton layer (201), and the hot-melt layer (202) are sequentially arranged along the thickness direction of the frame; and along the width direction of the skeleton layer (201), the first electrode tab (4) is penetrated through the skeleton layer (201).

3. The soft package battery according to claim 2, characterized in that The melting point of the skeleton layer (201) is greater than the melting point of the hot-melt layer (202).

4. The soft package battery according to claim 2 or 3, characterized in that: The orthographic projection of the hot melt layer (202) perpendicular to the surface coincides with the orthographic projection of the skeleton layer (201) perpendicular to the surface.

5. The soft package battery according to claim 2, characterized in that: The thickness t of the skeleton layer (201) satisfies at least one of the following: t≥0.5mm; t=thickness T1 / 0.95 of the battery electrode group (1) - depth T2*2 of the groove (301) - thickness T3*2 of the hot melt layer (202), thickness T3 of the hot melt layer (202) ≥ 0.15 mm.

6. The soft package battery according to claim 1, characterized in that The frame comprises at least four support plates, which are interconnected to form the frame. The four support plates comprise a connecting support plate (211) and at least one tab support plate (210). The first tab (4) is arranged on the tab support plate (210). The width of the tab support plate (210) is greater than or equal to the width of the connecting support plate (211).

7. The soft package battery according to claim 6, characterized in that: The number of the first pole lugs (4) is two, and the two first pole lugs (4) are respectively located on the same side or opposite sides of the frame.

8. The soft package battery according to claim 6, characterized in that The width of the connecting support plate (211) is greater than or equal to 3 mm.

9. The soft package battery according to claim 1, characterized in that The thickness t1 of the first pole tab (4) is ≥0.1 mm, and the width w3 of the first pole tab (4) is ≥5 mm.

10. The soft package battery according to claim 1, characterized in that The battery electrode group (1) comprises a positive electrode sheet, a negative electrode sheet and a solid electrolyte membrane which are stacked.

11. A method for manufacturing a soft package battery according to any one of claims 1 to 10, characterized in that: include: Placing a packaging frame (2) on an assembly tool; the packaging frame (2) has a frame and a first tab (4); Placing the battery electrode group (1) into the enclosed area of the packaging frame (2); Connecting the first electrode tab (4) and the second electrode tab (101) of the battery electrode group (1) to each other; Placing a plastic film shell (3) having a groove (301) and a packaging edge (302) on both sides of the battery electrode group (1), and aligning the battery electrode group (1) and the groove (301); The packaging edge (302) and the packaging frame (2) are aligned, and the packaging edge (302) and the packaging frame (2) are connected to each other.

12. The manufacturing method according to claim 10, characterized in that: The frame comprises a skeleton layer (201) and at least two hot-melt layers (202), wherein the hot-melt layer (202), the skeleton layer (201), and the hot-melt layer (202) are sequentially arranged along the thickness direction of the frame; along the width direction of the skeleton layer (201), the first electrode tab (4) is penetrated through the skeleton layer (201), and the melting point of the skeleton layer (201) is greater than the melting point of the hot-melt layer (202); The step of connecting the packaging edge (302) and the packaging frame (2) to each other comprises: Positioning the packaging edge (302) and the hot melt layer (202) relative to each other and fixing them with a clamp; Extruding the packaging edge (302) and the hot melt layer (202) at any value between 65 kPa and 80 kPa and any value between 30 seconds and 60 seconds; The packaging edge (302) and the hot melt layer (202) are hot-melt-fused at any value between 0.5 MPa and 0.6 MPa, any value between 190° C. and 195° C., and any value between 5 seconds and 7 seconds.

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