A battery cell without electromagnetic interference, a soft-pack lithium battery and a manufacturing method thereof

Abstract

The present invention discloses an electromagnetic interference-free battery cell, a soft-pack lithium battery and a manufacturing method thereof, wherein the battery cell includes a roll core body, which is formed by stacking and winding a rectangular first diaphragm, a positive electrode sheet, a second diaphragm, a negative electrode sheet and a third diaphragm, and the surface of the roll core body is covered with a circle of first aluminum-plastic film, one end of the positive electrode sheet is connected to the positive electrode tab, and the positive electrode tab is vertically led out from the length direction of the positive electrode sheet, and one end of the negative electrode sheet is connected to the negative electrode tab, and the negative electrode tab is vertically led out from the length direction of the negative electrode sheet, and the exposed extension portion of the positive electrode tab and / or the negative electrode tab of the roll core body is vertically bent from the top surface or bottom surface of the roll core body to the side surface, and forms at least one radial conductor along the radial direction of the roll core body. The structure and manufacturing method of the present invention are simple, and can reduce or offset the electromagnetic field generated during charging and discharging, so as to avoid affecting the normal operation and accuracy of precision components that are sensitive to electromagnetic fields.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack lithium batteries, and in particular to a battery cell without electromagnetic interference, a soft-pack lithium battery and a manufacturing method thereof. Background Art

[0002] The outer packaging materials of lithium batteries are divided into soft packaging and hard packaging. Compared with hard packaging materials such as steel shells and aluminum shells, soft packaging materials made of multi-layer films have the advantages of light weight, large capacity, high safety, and free choice of packaging shape.

[0003] Soft-pack lithium batteries are generally installed inside small, high-precision components with strict space constraints, such as mice, mobile phones and Bluetooth headsets.

[0004] During the charging and discharging process, the soft-pack lithium battery itself will generate a weak electromagnetic field. Under normal circumstances, the interference caused to the equipment is not strong and can be ignored. However, if the lithium battery is installed in a precision component that is sensitive to electromagnetic fields, such as a Bluetooth headset, the lithium battery will cause certain interference and influence on the speaker magnetic field in the Bluetooth headset during the charging and discharging process, thereby affecting the playback quality of the Bluetooth headset and generating noise or hum. Therefore, it is of positive significance to manufacture a battery and soft-pack lithium battery without electromagnetic interference. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a battery cell, a soft-pack lithium battery and a manufacturing method thereof without electromagnetic interference. The soft-pack lithium battery has a simple structure and manufacturing method, and can reduce or offset the electromagnetic field generated during charging and discharging, thereby avoiding affecting the normal operation and accuracy of precision components that are sensitive to electromagnetic fields.

[0006] To achieve the above-mentioned objectives, the present invention provides an electromagnetic interference-free battery cell, comprising a core body, wherein the core body is formed by stacking and winding a rectangular first diaphragm, a positive electrode sheet, a second diaphragm, a negative electrode sheet and a third diaphragm, and the surface of the core body is covered with a circle of first aluminum-plastic film, one end of the positive electrode sheet is connected to the positive electrode tab, and the positive electrode tab is vertically led out from the length direction of the positive electrode sheet, and one end of the negative electrode sheet is connected to the negative electrode tab, and the negative electrode tab is vertically led out from the length direction of the negative electrode sheet, and the exposed extension part of the positive electrode tab and / or the negative electrode tab of the core body is vertically bent from the top surface or bottom surface of the core body to the side, and forms at least one radial conductor along the radial direction of the core body.

[0007] Preferably, the positive electrode tab and the negative electrode tab are at the same height on the side of the winding core body after being bent, and the angle of the positive electrode tab and the negative electrode tab after being bent is between 0° and 180°.

[0008] Preferably, the positive electrode tab and the negative electrode tab are in the same position, and the angle between the positive electrode tab and the negative electrode tab after bending is 180°.

[0009] Preferably, the positive electrode tab and the negative electrode tab are both located at the end of the rear section of the winding core body.

[0010] Preferably, the positive electrode tab is an aluminum-to-nickel tab, and the negative electrode tab is a nickel tab. The positive electrode tab is connected to the positive electrode sheet by welding, riveting, or punching, and the negative electrode tab is connected to the negative electrode sheet by welding, riveting, or punching.

[0011] The present invention also provides a soft-pack lithium battery with no electromagnetic interference, comprising the above-mentioned battery cell without electromagnetic interference, wherein the roll core body is wrapped with a second aluminum-plastic film and a third aluminum-plastic film above and below and then hot-pressed and sealed to form a battery cell body, a sealing edge is formed between the second aluminum-plastic film and the third aluminum-plastic film, and the positive electrode tab and the negative electrode tab extend from the interior of the battery cell body.

[0012] Preferably, the connection between the positive electrode tab and the sealing edge is coated with positive electrode tab glue, and the connection between the negative electrode tab and the sealing edge is coated with negative electrode tab glue.

[0013] Preferably, the sealing edge is attached to the battery cell body, the angle between the positive electrode tab and the axis of the battery cell body is between 0°-90°, and the angle between the negative electrode tab and the axis of the battery cell body is between 0°-90°.

[0014] The present invention also provides a method for manufacturing the above-mentioned soft-pack lithium battery without electromagnetic interference, comprising the following steps:

[0015] Step S1: Making electrode sheets and welding electrode tabs, cutting out rectangular positive and negative electrode sheets, welding the positive electrode tab perpendicularly along the length direction of the positive electrode sheet, and welding the negative electrode tab perpendicularly along the length direction of the negative electrode sheet;

[0016] Step S2: preparing a roll core body by stacking a rectangular first separator, a positive electrode sheet, a second separator, a negative electrode sheet, and a third separator in sequence and then winding the stack core body;

[0017] Step S3: The core body is fixed, and the surface of the wound core body is covered with a circle of the first aluminum-plastic film;

[0018] Step S4: bending the tabs, vertically bending the exposed extension of the positive and / or negative tabs on the core body from the top or bottom surface of the core body to the side surface, and forming at least one radial conductor along the radial direction of the core body;

[0019] Step S5: Aluminum-plastic film sealing: the core body is placed between the second aluminum-plastic film and the third aluminum-plastic film and sealed by hot pressing to form a battery cell body. A sealing edge is formed between the second aluminum-plastic film and the third aluminum-plastic film, and the positive electrode tab and the negative electrode tab extend from the interior of the battery cell body.

[0020] Step S6: injecting electrolyte into the core body, activating the core body, and then resealing the package;

[0021] Step S7: shaping and folding, using a punching tool to trim the shape of the battery body, remove excess aluminum-plastic film, and bend the sealing edge axially, so that the sealing edge is tightly attached to the surface of the battery body.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The exposed extension portion of the positive electrode tab and / or negative electrode tab of the core body of the present invention is vertically bent from the top or bottom surface of the core body to the side surface, and forms at least one radial conductor along the radial direction of the core body. When the lithium-ion battery is charged or discharged, the horizontal electromagnetic field generated by the radial conductor is perpendicular to the vertical electromagnetic field generated by the core body, thereby reducing or offsetting the magnetic field of the entire lithium-ion battery, thereby avoiding affecting the normal operation and accuracy of precision components that are sensitive to electromagnetic fields.

[0024] 2. The present invention adopts a stacking and then winding method to form the core body. The structure and manufacturing method are simple, which can effectively improve the energy density of the lithium battery and make it suitable for assembly on more flexible wearable electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of a cross-section of a winding core body of a battery cell without electromagnetic interference provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the other side of the cross section of the winding core body of a battery cell without electromagnetic interference provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the connection between the positive electrode sheet and the positive electrode tab of a battery cell without electromagnetic interference provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the connection between the negative electrode sheet and the negative electrode tab of a battery cell without electromagnetic interference provided by the present invention;

[0030] Figure 5 This is a front view of a winding core body after the tabs are bent in a first embodiment of a battery cell without electromagnetic interference provided by the present invention;

[0031] Figure 6 This is a front view of a winding core body after the tabs are bent in a second embodiment of a battery cell without electromagnetic interference provided by the present invention;

[0032] Figure 7 This is a bottom view of a winding core body after the tabs are bent, according to a second embodiment of a battery cell without electromagnetic interference provided by the present invention;

[0033] Figure 8 This is a schematic diagram of the main structure of a soft-pack lithium battery cell without electromagnetic interference provided by the present invention;

[0034] Figure 9 This is a front view of a battery cell body of a soft-pack lithium battery without electromagnetic interference provided by the present invention;

[0035] Figure 10 The present invention provides a schematic structural diagram of a soft-pack lithium battery without electromagnetic interference after the battery body is shaped and folded.

[0036] Included in the diagram are:

[0037] 31-first diaphragm, 1-positive electrode sheet, 32-second diaphragm, 2-negative electrode sheet, 33-third diaphragm, 4-winding core body, 5-positive electrode tab, 91-positive electrode tab glue, 92-negative electrode tab glue, 6-negative electrode tab, 81-first aluminum-plastic film, 82-second aluminum-plastic film, 83-third aluminum-plastic film, 10-sealing edge, 7-battery cell body, 11-radial conductor. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solution in this embodiment of the present invention in conjunction with the drawings in this embodiment of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] Example 1

[0040] Please refer to Figures 1 to 7 , the embodiment of the present invention provides a battery cell without electromagnetic interference, including a winding core body 4, such as Figure 1 and 2As shown, the core body 4 is formed by stacking and winding a rectangular first diaphragm 31, a positive electrode sheet 1, a second diaphragm 32, a negative electrode sheet 2 and a third diaphragm 33. The surface of the core body 4 is covered with a circle of first aluminum-plastic film 81. The core body 4 is made by stacking and then winding. The structure and manufacturing method of the core body 4 are simple, which can effectively improve the energy density of the lithium battery, so that it is suitable for assembly on more flexible wearable electronic products.

[0041] like Figure 3 As shown, one end of the positive electrode sheet 1 is connected to the positive electrode tab 5, and the positive electrode tab 5 is vertically drawn out from the length direction of the positive electrode sheet 1, as shown in FIG. Figure 4 As shown, one end of the negative electrode sheet 2 is connected to the negative electrode tab 6, and the negative electrode tab 6 is vertically led out from the length direction of the negative electrode sheet 2. The exposed extension part of the positive electrode tab 5 and / or the negative electrode tab 6 is vertically bent from the top or bottom surface of the core body 4 to the side, and forms at least one radial conductor 11 along the radial direction of the core body 4, so that during the charging or discharging process of the lithium-ion battery, the horizontal electromagnetic field generated by the radial conductor 11 when it is energized is perpendicular to the vertical electromagnetic field generated by the core body 4, so that the magnetic field of the entire lithium-ion battery is reduced or offset, thereby avoiding affecting the normal operation and accuracy of precision components that are sensitive to electromagnetic fields.

[0042] Furthermore, in this embodiment, the radial conductor 11 is formed by or consists of the exposed extension portion of the positive electrode tab 5 and / or the negative electrode tab 6 on the winding core body 4. In other embodiments, the radial conductor 11 can be formed by a conductor that generates a stronger magnetic field and has a lower resistance, and can be specifically installed between the positive electrode tab 5 and / or the negative electrode tab 6.

[0043] Specifically, such as Figure 5 As shown, in the winding core body 4, if the negative electrode tab 6 is longer than the positive electrode tab 5, the vertical positive electrode tab 5 after winding is first bent vertically toward the side of the winding core body 4 along the radial direction of the winding core body 4, specifically to the left or right side, which is determined by the specific production situation. Secondly, after extending one end distance along the axial direction of the winding core body 4, it is vertically bent again so that the positive electrode tab 5 extends horizontally; the vertical negative electrode tab 6 after winding is first bent vertically toward the side of the winding core body 4 along the radial direction of the winding core body 4, by Because the negative electrode tab 6 is longer, the negative electrode tab 6 passes through the top surface of the core body 4 and is bent vertically to the side, forming a radial conductor 11 along the radial direction of the core body 4. Secondly, the negative electrode tab 6 is bent vertically along the axial direction of the core body 4. Thirdly, the negative electrode tab 6 extends one end distance along the axial direction of the core body 4 and is then bent vertically again, so that the negative electrode tab 6 extends horizontally. Similarly, in the core body 4, if the positive electrode tab 5 is longer than the negative electrode tab 6, it can be bent according to the above principle.

[0044] Specifically, such as Figure 6 and 7 As shown, in the winding core body 4, if the negative electrode tab 6 is longer than the positive electrode tab 5, the vertical positive electrode tab 5 and the negative electrode tab 6 after winding are bent vertically toward the side of the winding core body 4 along the radial direction of the winding core body 4, specifically to the left or right side, which is determined by the specific production situation. After the positive electrode tab 5 extends one end distance along the axial direction of the winding core body 4, it is bent vertically again so that the positive electrode tab 5 extends horizontally; the negative electrode tab 6 extends along the axial direction of the winding core body 4 to the bottom of the winding core body 4 First, the negative electrode tab 6 passes through the bottom surface of the core body 4 and is bent vertically to the side surface, forming a radial conductor 11 along the radial direction of the core body 4. Secondly, the negative electrode tab 6 is bent vertically along the axial direction of the core body 4. Thirdly, after the negative electrode tab 6 extends a distance in the axial direction of the core body 4, it is bent vertically again so that the negative electrode tab 6 extends horizontally. Similarly, in the core body 4, if the positive electrode tab 5 is longer than the negative electrode tab 6, it can be bent according to the above principle.

[0045] Furthermore, if the negative electrode tab 6 and the positive electrode tab 5 are located in the middle of the winding core body 4 , the negative electrode tab 6 and the positive electrode tab 5 are respectively bent vertically to both sides to form a radial conductor 11 .

[0046] After being bent, the positive electrode tab 5 and the negative electrode tab 6 are at the same height on the side of the winding core body 4. Since it is not limited that the positive electrode tab 5 and the negative electrode tab 6 are at the same position, the angle of the positive electrode tab 5 and the negative electrode tab 6 after being bent is between 0° and 180°, which can be selected according to actual conditions and is not limited to this embodiment.

[0047] like Figure 5 、 6 As shown in FIG7 , the positive electrode tab 5 and the negative electrode tab 6 are in the same position, and the angle between the positive electrode tab 5 and the negative electrode tab 6 after bending is 180°; specifically, Figure 5 As shown in , the exposed extension portion of the negative electrode tab 6 is vertically bent from the top surface of the winding core body 4 to the side surface, and the angle between the positive electrode tab 5 and the negative electrode tab 6 after bending is 180°; Figure 6 and 7 As shown in , the exposed extended portion of the negative electrode tab 6 is vertically bent from the bottom surface of the winding core body 4 to the side surface, and the angle between the positive electrode tab 5 and the negative electrode tab 6 after bending is 180°.

[0048] Further, such as Figure 5 、 6 As shown in FIG7 , the positive electrode tab 5 and the negative electrode tab 6 are both located at the end of the rear section of the winding core body 4 .

[0049] The positive electrode tab 5 is an aluminum-to-nickel tab, and the negative electrode tab 6 is a nickel tab. The positive electrode tab 5 is connected to the positive electrode sheet 1 by welding, riveting, or punching, and the negative electrode tab 6 is connected to the negative electrode sheet 2 by welding, riveting, or punching.

[0050] The winding core body 4 can be installed inside a steel shell battery or a soft-pack lithium battery.

[0051] Example 2

[0052] Please refer to Figures 8 to 10 A second embodiment of the present invention provides an electromagnetic interference-free soft-pack lithium battery, comprising the electromagnetic interference-free battery cell described in the first embodiment. The wound core body 4 is covered with a second aluminum-plastic film 82 and a third aluminum-plastic film 83 above and below, and then hot-pressed and sealed to form a battery cell body 7. A sealing edge 10 is formed between the second aluminum-plastic film 82 and the third aluminum-plastic film 83. The positive electrode tab 5 and the negative electrode tab 6 extend from the interior of the battery cell body 7. The outer packaging of the present invention is an aluminum-plastic film outer packaging, which effectively reduces the overall weight of the lithium battery.

[0053] The connection between the positive electrode tab 5 and the sealing edge 10 is coated with a positive electrode tab glue 91, and the connection between the negative electrode tab 6 and the sealing edge 10 is coated with a negative electrode tab glue 92. The positive electrode tab 5 and the negative electrode tab 6 can be in the same direction or in opposite directions, which can be selected according to actual conditions and is not limited to this embodiment.

[0054] The sealing edge 10 is attached to the battery cell body 7 , and the sealing edge 10 and the battery cell body 7 are tightly fitted together, thereby reducing the volume of the lithium battery and increasing the unit density of the lithium battery.

[0055] The angle between the positive electrode tab 5 and the axis of the battery body 7 is between 0° and 90°, and the angle between the negative electrode tab 6 and the axis of the battery body 7 is between 0° and 90°. Specifically, Figure 8 and 9 As shown, the angle between the positive electrode tab 5 and the axis of the battery body 7 is 90°, and the angle between the negative electrode tab 6 and the axis of the battery body 7 is 90°. Figure 10 As shown, the angle between the positive electrode tab 5 and the axis of the battery body 7 is 0°, and the angle between the negative electrode tab 6 and the axis of the battery body 7 is 0°, so that the positive electrode tab 5 and the negative electrode tab 6 can have greater freedom to adapt to smaller precision components, making it more widely used.

[0056] Example 3

[0057] A third embodiment of the present invention provides a method for manufacturing a soft-pack lithium battery without electromagnetic interference as described in the second embodiment, comprising the following steps:

[0058] Step S1: Make electrodes and weld tabs. Cut out rectangular positive electrode sheets 1 and negative electrode sheets 2. Weld the positive electrode tab 5 perpendicularly along the length direction of the positive electrode sheet 1 and weld the negative electrode tab 6 perpendicularly along the length direction of the negative electrode sheet 2.

[0059] Step S2 : manufacturing the winding core body 4 , stacking the rectangular first separator 31 , the positive electrode sheet 1 , the second separator 32 , the negative electrode sheet 2 and the third separator 33 in sequence and then winding them to form the winding core body 4 .

[0060] Step S3: The core body 4 is fixed, and the surface of the wound core body 4 is covered with a circle of the first aluminum-plastic film 81 .

[0061] Step S4: bending the tabs, bending the exposed extension of the positive tab 5 and / or the negative tab 6 on the core body 4 vertically from the top or bottom surface of the core body 4 to the side surface, and forming at least one radial conductor 11 along the radial direction of the core body 4.

[0062] Step S5: Aluminum-plastic film sealing: the core body 4 is placed between the second aluminum-plastic film 82 and the third aluminum-plastic film 83 and sealed by hot pressing to form the battery cell body 7. A sealing edge 10 is formed between the second aluminum-plastic film 82 and the third aluminum-plastic film 83, and the positive electrode tab 5 and the negative electrode tab 6 extend from the interior of the battery cell body 7.

[0063] Step S6: Liquid injection, activation and resealing: inject electrolyte into the core body 4, activate the core body 4, and then reseal and package.

[0064] Step S7: shaping and folding, using a punching tool to trim the shape of the battery body 7, remove excess aluminum-plastic film, and bend the sealing edge 10 axially, so that the sealing edge 10 is tightly attached to the surface of the battery body 7.

[0065] The above-mentioned manufacturing method is simple to operate, greatly improves the manufacturing efficiency of lithium batteries, and improves the production quality of lithium batteries.

[0066] In summary, the beneficial effects of the present invention are:

[0067] The positive electrode tab 5 and / or the negative electrode tab 6 of the present invention are vertically bent from the top or bottom surface of the core body 4 to the same height on the side at the exposed extension part of the core body 4, and at least one radial conductor 11 is formed along the radial direction of the core body 4, so that during the charging or discharging process of the lithium-ion battery, the horizontal electromagnetic field generated by the radial conductor 11 when energized is perpendicular to the vertical electromagnetic field generated by the core body 4, so that the magnetic field of the entire lithium-ion battery is reduced or offset, avoiding affecting the normal operation and accuracy of precision components that are sensitive to electromagnetic fields; the present invention adopts the stacking and then winding method to make the core body 4, which has a simple structure and manufacturing method, can effectively improve the energy density of the lithium battery, and is suitable for assembly on more flexible wearable electronic products.

Claims

1. A battery cell without electromagnetic interference, characterized in that: The invention comprises a winding core body (4), wherein the winding core body (4) is formed by stacking and winding a rectangular first diaphragm (31), a positive electrode sheet (1), a second diaphragm (32), a negative electrode sheet (2) and a third diaphragm (33); a surface of the winding core body (4) is covered with a circle of a first aluminum-plastic film (81); one end of the positive electrode sheet (1) is connected to a positive electrode tab (5), and the positive electrode tab (5) is vertically drawn out from the length direction of the positive electrode sheet (1); one end of the negative electrode sheet (2) is connected to a negative electrode tab (6), and the negative electrode tab (6) is vertically drawn out from the length direction of the negative electrode sheet (2); the positive electrode tab (5) or the negative electrode tab (6) is vertically bent from the top surface or bottom surface of the winding core body (4) to the side surface at an exposed extension portion of the winding core body (4), and forms a radial conductor (11) along the radial direction of the winding core body (4); The radial conductor (11) is formed by the exposed extension portion of the positive electrode tab (5) or the negative electrode tab (6) on the winding core body (4); The positive electrode tab (5) and the negative electrode tab (6) are both located at the end of the rear section of the winding core body (4); the positive electrode tab (5) and the negative electrode tab (6) are located at the same position; In the winding core body (4), the negative electrode tab (6) is longer than the positive electrode tab (5), and the vertical positive electrode tab (5) and the negative electrode tab (6) after winding are vertically bent toward the side of the winding core body (4) along the radial direction of the winding core body (4), and the positive electrode tab (5) is extended along the axial direction of the winding core body (4) for a distance and then vertically bent again, so that the positive electrode tab (5) extends horizontally; the negative electrode tab (6) extends along the axial direction of the winding core body (4) to the bottom of the winding core body (4), and the negative electrode tab (6) passes through the bottom surface of the winding core body (4) and is vertically bent to the side, and forms a radial conductor (11) along the radial direction of the winding core body (4); the negative electrode tab (6) is vertically bent along the axial direction of the winding core body (4), and the negative electrode tab (6) is extended along the axial direction of the winding core body (4) for a distance and then vertically bent again, so that the negative electrode tab (6) extends horizontally; The angle between the positive electrode tab (5) and the negative electrode tab (6) after being bent is 180°; the positive electrode tab (5) and the negative electrode tab (6) after being bent are at the same height on the side of the winding core body (4); During the charging or discharging process, the horizontal electromagnetic field generated by the radial conductor (11) being energized and the vertical electromagnetic field generated by the winding core body (4) are perpendicular to each other, so that the magnetic field of the entire lithium-ion battery is reduced.

2. The battery cell without electromagnetic interference according to claim 1, characterized in that: The positive electrode tab (5) is an aluminum-to-nickel tab, and the negative electrode tab (6) is a nickel tab. The positive electrode tab (5) is connected to the positive electrode sheet (1) by welding, riveting, or punching, and the negative electrode tab (6) is connected to the negative electrode sheet (2) by welding, riveting, or punching.

3. A soft-pack lithium battery without electromagnetic interference, characterized in that: A battery cell without electromagnetic interference according to any one of claims 1 to 2, wherein the roll core body (4) is covered with a second aluminum-plastic film (82) and a third aluminum-plastic film (83) on top and bottom and then hot-pressed and sealed to form a battery cell body (7), a sealing edge (10) is formed between the second aluminum-plastic film (82) and the third aluminum-plastic film (83), and the positive electrode tab (5) and the negative electrode tab (6) extend from the interior of the battery cell body (7).

4. The soft-pack lithium battery without electromagnetic interference according to claim 3, characterized in that: The connection between the positive electrode tab (5) and the sealing edge (10) is coated with a positive electrode tab glue (91), and the connection between the negative electrode tab (6) and the sealing edge (10) is coated with a negative electrode tab glue (92).

5. The soft-pack lithium battery without electromagnetic interference according to claim 3, characterized in that: The sealing edge (10) is attached to the battery cell body (7), the angle between the positive electrode tab (5) and the axis of the battery cell body (7) is between 0° and 90°, and the angle between the negative electrode tab (6) and the axis of the battery cell body (7) is between 0° and 90°.

6. A method for manufacturing a soft-pack lithium battery without electromagnetic interference according to claim 3, characterized in that: The following steps are involved: Step S1: making electrodes and welding tabs, cutting out rectangular positive electrode sheets (1) and negative electrode sheets (2), welding the positive electrode tab (5) perpendicularly in the length direction of the positive electrode sheet (1), and welding the negative electrode tab (6) perpendicularly in the length direction of the negative electrode sheet (2); Step S2: preparing a winding core body (4), stacking a rectangular first separator (31), a positive electrode sheet (1), a second separator (32), a negative electrode sheet (2), and a third separator (33) in sequence and then winding them to form a winding core body (4); Step S3: The core body (4) is fixed, and the surface of the wound core body (4) is covered with a circle of the first aluminum-plastic film (81); Step S4: bending the tabs, vertically bending the exposed extension of the positive tab (5) or the negative tab (6) on the core body (4) from the top or bottom surface of the core body (4) to the side surface, and forming a radial conductor (11) along the radial direction of the core body (4); Step S5: Aluminum-plastic film sealing, placing the core body (4) between the second aluminum-plastic film (82) and the third aluminum-plastic film (83) and performing hot pressing and sealing to form a battery cell body (7), forming a sealing edge (10) between the second aluminum-plastic film (82) and the third aluminum-plastic film (83), and the positive electrode tab (5) and the negative electrode tab (6) extending from the interior of the battery cell body (7); Step S6: injecting electrolyte, activating and resealing, injecting electrolyte into the interior of the core body (4), activating the core body (4), and then resealing and packaging; Step S7; Shaping and folding: trimming the shape of the battery cell body (7) through a punching tool, removing excess aluminum-plastic film, and bending the sealing edge (10) in the axial direction, wherein the sealing edge (10) is tightly attached to the surface of the battery cell body (7).

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