CN114420994A - Soft package button battery, manufacturing method thereof and electronic equipment - Google Patents
Soft package button battery, manufacturing method thereof and electronic equipment Download PDFInfo
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- CN114420994A CN114420994A CN202111676550.1A CN202111676550A CN114420994A CN 114420994 A CN114420994 A CN 114420994A CN 202111676550 A CN202111676550 A CN 202111676550A CN 114420994 A CN114420994 A CN 114420994A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/109—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure of button or coin shape
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a soft package button battery, aiming at solving the problems that the existing button battery generates electromagnetic field, so that the bottom noise is generated and the product quality is reduced. The winding core comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate; the positive plate, the diaphragm and the negative plate are sequentially stacked and then wound to form a winding core, the positive tab is led out from the positive plate, the negative tab is led out from the negative plate, the central connecting line of the positive tab and the winding core is used as a first datum line, the central connecting line of the negative tab and the winding core is used as a second datum line, and the included angle between the first datum line and the second datum line is 30-75 degrees. The invention also provides a manufacturing method of the soft package button battery. According to the soft-package button battery provided by the invention, the included angle between the positive electrode lug and the negative electrode lug is controlled to be 30-75 degrees, so that the length difference between the positive electrode plate and the negative electrode plate in the ending process is reduced, the magnetic fields generated by the positive electrode plate and the negative electrode plate can be further offset, and the bottom noise phenomenon is relieved.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a soft package button battery, a manufacturing method thereof and electronic equipment.
Background
In recent years, with the rapid development of electronic technology, various types of electronic devices have emerged. Background noise is a common problem of current electronic equipment, especially on 3C digital earphones. Background noise, or background noise, generally refers to the total noise in an acoustic system, excluding a useful signal. Especially, with the popularization and use of a TWS (True Wireless Stereo) bluetooth headset, the user has an improved experience requirement, the True Wireless noise reduction headset has a higher pursuit for tone quality, the sensitivity of the speaker is stronger, and if the soft package button cell is assembled and coupled with the speaker in a contraposition manner, a magnetic field is generated during discharging to interfere with the speaker to work, so that noise or current sound is formed, and the user experience is seriously affected.
The existing soft package button battery has a lot of reasons for generating bottom noise, and most of the bottom noise is from the battery core. The current flows on the battery, and bottom noise is inevitably generated. For current soft packet of button cell, wherein electric core is mostly negative pole piece parcel positive plate, the coiling structure who forms after coiling again, and wherein, positive ear and negative pole ear symmetry set up at electric core both ends. In this case, when the battery is discharged, the currents flowing in the positive and negative electrode tabs are opposite to each other, and the magnetic field generated by the portion of the negative electrode tab that is more than the positive electrode tab cannot be cancelled, thereby causing a bottom noise phenomenon.
In the related art, in order to solve the problem of the bottom noise generated by the battery, the tail lengths of the positive and negative pole pieces are set to be equal, so that magnetic fields generated on the positive and negative pole pieces can be exactly offset, and the bottom noise phenomenon is eliminated. However, the arrangement can lead the positions of the positive and negative pole lugs to be overlapped in the radial direction of the battery core, on one hand, the difficulty of the lug welding process is increased, and the large-scale industrial production is not facilitated, and on the other hand, the positive and negative pole lugs are overlapped, so that the battery is easily influenced badly due to the fact that expansion is subjected to extrusion force.
Disclosure of Invention
The invention provides a soft package button battery, a manufacturing method thereof and electronic equipment, and aims to solve the problems that bottom noise is generated due to the fact that an electromagnetic field is generated in an existing button battery, and the quality of a product is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
on one hand, the invention provides a soft package button battery, which comprises a winding core, wherein the winding core comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate;
the positive plate, the diaphragm and the negative plate are sequentially stacked and then wound to form the winding core, a positive lug is led out of the positive plate, a negative lug is led out of the negative plate, a central connecting line of the positive lug and the winding core is used as a first datum line, a central connecting line of the negative lug and the winding core is used as a second datum line, and an included angle between the first datum line and the second datum line is 30-75 degrees.
Optionally, the positive plate and the negative plate both have a first end and a second end along the length direction, the positive plate and the negative plate are wound by the first end to the second end to form the winding core, the positive tab is arranged at the tail end of the second end of the positive plate, and the negative tab is arranged at the tail end of the second end of the negative plate.
Optionally, the winding core is of a cylindrical structure, and the positive tab and the negative tab are located in different radial directions of the winding core.
Optionally, an included angle between the first reference line and the second reference line is 30 ° to 60 °.
Optionally, the first end of the negative electrode plate is located on the inner side of the first end of the positive electrode plate, the second end of the negative electrode plate is located on the outer side of the second end of the positive electrode plate, and the length of the tail of the negative electrode plate is greater than that of the tail of the positive electrode plate.
Optionally, the number of winding turns of the diaphragm is greater than or equal to that of the negative electrode sheet;
the soft package button battery also comprises an aluminum-plastic film shell, and the winding core is positioned in the aluminum-plastic film shell;
the included angle between the first datum line and the second datum line is 30-45 degrees.
Optionally, the first reference line is taken as an x axis, a horizontal line perpendicular to the first reference line is taken as a y axis, and a distance between a projection position of the positive tab on the y axis and a projection position of the negative tab on the y axis is not less than 1 mm.
On the other hand, the invention also provides a manufacturing method of the soft package button battery, which comprises the following steps:
step S1: manufacturing a roll core: stacking a positive plate, a diaphragm and a negative plate in sequence and then winding the positive plate, the diaphragm and the negative plate to form a winding core, wherein the central connecting line of the positive tab and the winding core is used as a first datum line, the central connecting line of the negative tab and the winding core is used as a second datum line, and the included angle between the first datum line and the second datum line is controlled to be 30-75 degrees;
step S2: and (3) core packaging: and coating an aluminum-plastic film on the surface of the coiled core after coiling to obtain the battery.
Optionally, after the step S2, the method further includes:
step S3: liquid injection and activation: injecting electrolyte into the battery to activate the battery;
step S4: secondary packaging, shaping and folding: and after activation, carrying out secondary packaging on the battery, and then trimming the appearance of the battery through a blanking process to obtain the soft package button battery.
On the other hand, the invention also provides electronic equipment comprising the soft package button battery.
The invention has the beneficial effects that: according to the soft package button battery provided by the invention, the included angle between the positive tab and the negative tab is controlled to be smaller than 75 degrees, the length difference between the negative plate and the positive plate at the ending part is reduced, so that the electromagnetic field intensity difference generated by the positive plate and the negative plate is reduced, an interference magnetic field generated by a winding core of the battery during operation can be reduced or eliminated, the bottom noise phenomenon of the equipment is effectively improved, meanwhile, the included angle between the positive tab and the negative tab is controlled to be larger than 30 degrees, the problem that the difficulty of the battery manufacturing process is increased due to the fact that the positive tab and the negative tab are too close to each other is avoided, and the soft package button battery is suitable for large-scale industrial production.
Drawings
FIG. 1 is a schematic view of a portion of a core according to an embodiment of the present invention;
FIG. 2 is a schematic view of an appearance of a winding core provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of an external appearance of a core packaging process provided by an embodiment of the invention;
fig. 4 shows the results of the noise floor test of the pouch button cell provided in example 1;
fig. 5 shows the results of the noise floor test of the pouch button cell provided in example 2;
fig. 6 is the results of the floor noise test of the pouch button cell provided in comparative example 1.
The reference numbers in the drawings of the specification are as follows:
1. a winding core; 11. a positive plate; 111. a positive tab; 12. a negative plate; 121. a negative tab; 2. and (3) an aluminum plastic film.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that all the directional indicators (such as the inner side and the outer side … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. between the structures in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the invention provides a soft-package button battery, which includes a winding core 1, where the winding core 1 includes a positive plate 11, a negative plate 12, and a separator disposed between the positive plate 11 and the negative plate 12;
the positive plate 11 the diaphragm with negative plate 12 stacks gradually the back coiling formation roll up core 1, positive tab 111 has been drawn forth on the positive plate 11, negative tab 121 has been drawn forth on the negative plate 12, with positive tab 111 with the central line of rolling up core 1 is first datum line, with negative tab 121 with the central line of rolling up core 1 is the second datum line, first datum line with the contained angle between the second datum line is 30 ~ 75.
According to the soft package button battery provided by the invention, the included angle between the positive tab 111 and the negative tab 121 is controlled to be smaller than 75 degrees, and the length difference between the negative tab 12 and the positive tab 11 at the ending part is reduced, so that the electromagnetic field intensity difference generated by the positive tab 11 and the negative tab 12 is reduced, an interference magnetic field generated by the winding core 1 when the battery works can be reduced or eliminated, the device bottom noise phenomenon is effectively improved, meanwhile, the included angle between the positive tab 111 and the negative tab 121 is controlled to be larger than 30 degrees, the problem that the difficulty of the battery manufacturing process is increased due to the fact that the positive tab 111 and the negative tab 121 are too close to each other is avoided, and the soft package button battery is suitable for large-scale industrial production.
Specifically, the center of the roll core 1 is located on the central axis of the roll core 1, the central axis of the roll core 1 generally refers to a horizontal line where a winding needle is located during winding, and the first reference line and the second reference line are perpendicular to the central axis of the roll core.
In some embodiments, each of the positive electrode sheet 11 and the negative electrode sheet 12 has a first end and a second end along the length direction, each of the positive electrode sheet 11 and the negative electrode sheet 12 is wound from the first end to the second end to form the winding core 1, the positive electrode tab 111 is disposed at the end of the second end of the positive electrode sheet 11, and the negative electrode tab 121 is disposed at the end of the second end of the negative electrode sheet 12.
Specifically, the positive electrode sheet 11 includes a positive electrode current collector and a positive electrode active material layer disposed on at least one side surface of the positive electrode current collector, and the positive electrode current collector may be a positive electrode current collector commonly used in the art, and is not particularly limited herein, such as an aluminum foil. The positive electrode active material layer may be prepared using a positive electrode active material commonly used in the art, and is not particularly limited herein, and for example, the positive electrode active material layer may include a conductive agent, a positive electrode active material, a binder, and the like.
Specifically, the negative electrode sheet 12 includes a negative electrode current collector and a negative electrode active material layer disposed on at least one side surface of the negative electrode current collector, and the negative electrode current collector may be a negative electrode current collector commonly used in the art, and is not particularly limited herein, such as a copper foil. The negative electrode active material layer may be prepared using a negative electrode active material commonly used in the art, and is not particularly limited herein, and for example, the negative electrode active material layer may include a conductive agent, a negative electrode active material, a binder, and the like.
In some embodiments, the winding core 1 has a cylindrical structure, and the positive tab 111 and the negative tab 121 are located on different radial extensions of the winding core 1.
The positive tab 111 and the negative tab 121 are arranged in a staggered mode in the radial direction, so that the difficulty of a battery manufacturing process caused by too short distance between the positive tab and the negative tab is avoided, the production efficiency of the soft package button battery is improved, and the method is suitable for large-scale industrial production.
In a preferred embodiment, the angle between the first reference line and the second reference line is between 30 ° and 60 °.
The applicant researches and discovers that the effect of remarkably weakening the electromagnetic field of the winding core 1 can be achieved by controlling the included angle between the first reference line and the second reference line to be less than 75 degrees. And, the smaller the included angle between the first datum line and the second datum line is, the smaller the interference magnetic field generated by the winding core 1 is, the smaller the influence on the load electronic equipment is, however, the included angle between the first datum line and the second datum line is too small, so that the distance between the positive lug and the negative lug is too close, on one hand, the battery manufacturing is not facilitated, the process difficulty is increased, the production efficiency is reduced, and the large-scale industrial production cannot be performed, on the other hand, after the battery is charged, the winding core 1 can expand to a certain degree, if the distance between the positive lug and the negative lug is too close, adverse conditions such as short circuit, breakage and the like of the pole piece are easily caused by the extrusion force received by the expansion of the winding core 1 at the welding position of the positive lug and the negative lug. Therefore, in order to further weaken the interference magnetic field generated by the winding core 1 and improve the battery production efficiency and quality, the included angle between the first reference line and the second reference line is preferably 30 ° to 60 °.
In some embodiments, the first end of the negative electrode sheet 12 is located inside the first end of the positive electrode sheet 11, the second end of the negative electrode sheet 12 is located outside the second end of the positive electrode sheet 11, and the length of the ending of the negative electrode sheet 12 is greater than the length of the ending of the positive electrode sheet 11.
That is, the position of the second end terminal of the negative electrode sheet 12 exceeds the position of the second end terminal of the positive electrode sheet 11 in the winding direction. The length of the negative plate 12 is greater than that of the positive plate 11, so that lithium ions separated from the positive plate 11 can be completely embedded into the negative plate 12, the phenomenon of lithium precipitation caused by the deposition of the lithium ions on the surface of the negative plate 12 is avoided, the safety performance of the battery is improved, the positive capacity is fully exerted, and the energy density of the battery is improved.
Specifically, the inner side refers to the side close to the central axis of the winding core 1, and the outer side refers to the side away from the central axis of the winding core 1
In some embodiments, the number of windings of the separator is greater than or equal to the number of windings of the negative electrode sheet 12;
the soft package button battery also comprises an aluminum-plastic film shell, and the winding core is positioned in the aluminum-plastic film shell;
the included angle between the first datum line and the second datum line is 30-45 degrees.
The smaller the included angle between the first reference line and the second reference line is, the smaller the interference magnetic field generated by the button cell with soft package is, and further, the more preferable the included angle between the first reference line and the second reference line is 30-45 degrees, and the applicant researches and finds that when the included angle between the first reference line and the second reference line is less than 45 degrees, the noise decibel of the bottom of the load device with the fixed frequency of 1000Hz-5000Hz can be mostly reduced to be less than 5dB, and the product quality and the user experience are remarkably improved.
In order to further improve the battery safety and avoid short circuit caused by contact of the positive plate 11 and the negative plate 12, the number of winding turns of the diaphragm is preferably greater than or equal to that of the negative electrode.
In some embodiments, with the first reference line as an x-axis and a horizontal line perpendicular to the first reference line as a y-axis, a distance between a projected position of the positive tab 111 on the y-axis and a projected position of the negative tab 121 on the y-axis is not less than 1 mm.
The arrangement ensures that the positive tab 111 and the negative tab 121 have enough distance, so that the situation that the positive tab and the negative tab are too close to each other to influence the battery manufacturing process is avoided, and meanwhile, the safety performance of the battery is improved.
On the other hand, the embodiment of the invention also provides a manufacturing method of the soft-package button battery, which comprises the following steps:
step S1: manufacturing a roll core: sequentially stacking a diaphragm, a positive plate and a negative plate and then winding to form a winding core, wherein the central connecting line of the positive tab and the winding core is used as a first datum line, the central connecting line of the negative tab and the winding core is used as a second datum line, and the included angle between the first datum line and the second datum line is controlled to be 30-75 degrees;
step S2: and (3) core packaging: and coating an aluminum-plastic film on the surface of the coiled core after coiling to obtain the battery.
In some embodiments, the step S2 is followed by:
step S3; liquid injection and activation: injecting electrolyte into the battery to activate the battery;
step S4: secondary packaging, shaping and folding: and after activation, carrying out secondary packaging on the battery cell, and trimming the appearance of the battery cell through a blanking process to obtain the soft package button battery.
On the other hand, the embodiment of the invention also provides electronic equipment comprising the soft package button battery.
Adopt the soft packet of button cell of this application can effectively reduce the end and make an uproar, improves product quality and user experience. The present invention will be further illustrated by the following examples.
Example 1
Referring to fig. 1, this embodiment is used to describe a soft-package button battery and a manufacturing method thereof disclosed in the present invention, and includes the following operation steps:
step S1: taking a positive plate and a negative plate, welding the positive tab at the second end of the positive plate, welding the negative tab at the second end of the negative plate, sequentially stacking the positive tab, the negative tab and the negative plate in a mode of a diaphragm, and winding the positive tab, the diaphragm and the negative plate into a cylindrical winding core from the first end to the second end, wherein the first end of the negative plate is positioned at the inner side of the first end of the positive plate, the second end of the negative plate is positioned at the outer side of the second end of the positive plate, a central connecting line of the positive tab and the winding core is taken as a first datum line, a central connecting line of the negative tab and the winding core is taken as a second datum line, and an included angle alpha between the first datum line and the second datum line is 60 degrees;
step S2: coating an aluminum-plastic film on the surface of the prepared roll core to obtain a battery;
step S3; injecting electrolyte into the battery to activate the battery;
step S4: and (4) performing secondary packaging, shaping and folding the battery, trimming the appearance of the battery through a blanking process, and subtracting the redundant aluminum-plastic film to obtain the soft package button battery.
Example 2
The present embodiment is used to explain the soft-package button battery and the manufacturing method thereof disclosed by the present invention, and includes most of the operations of embodiment 1, except that the included angle α between the first reference line and the second reference line is 45 °.
Comparative example 1
This comparative example is used for comparative explanation of the soft pack button cell and the manufacturing method thereof disclosed in the present invention, and includes most of the operations of example 1, except that the included angle α between the first reference line and the second reference line is 90 °.
Performance testing
The following performance tests were performed on the soft-package button cells prepared in examples 1-2 and comparative example 1:
and (3) testing the bottom noise: assembling the prepared soft-packaged button battery into the same whole machine, playing the same mute file, converting a sound signal into an electric signal by using an artificial ear, outputting the electric signal, recording the decibel and the frequency of the whole machine in the playing process, and obtaining a test result as shown in fig. 4-6.
Wherein fig. 4 is a bottom noise test result of the pouch button cell prepared in example 1.
Fig. 5 shows the bottom noise test results of the pouch button cell prepared in example 2.
Fig. 6 shows the results of the bottom noise test of the pouch button cell prepared in comparative example 1.
From the test results of fig. 4 to 6, it can be known that in the embodiments 1 to 2, the included angle between the positive tab and the negative tab is controlled to be 30 to 75 degrees, so that the interference magnetic field generated by the winding core 1 can be effectively weakened, the bottom noise decibel of the load device with the fixed frequency of 1000Hz to 5000Hz generated by the load device can be mostly reduced to below 5dB, the current bottom noise phenomenon is remarkably improved, and the smaller the included angle between the positive tab and the negative tab is, the smaller the bottom noise is.
The test result of contrast figure 6 discovers, and when the contained angle of anodal ear and negative pole ear was 90, the noise below 2000Hz was fairly obvious, can't play the effect of improving the end noise, and the contained angle of this application control anodal ear and negative pole ear is below 75, can show the electromagnetic field that weakens roll core 1 and produce, slows down the end noise phenomenon.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The soft package button battery is characterized by comprising a winding core, wherein the winding core comprises a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate;
the positive plate, the diaphragm and the negative plate are sequentially stacked and then wound to form the winding core, a positive tab is led out of the positive plate, a negative tab is led out of the negative plate, a central connecting line of the positive tab and the winding core is used as a first datum line, a central connecting line of the negative tab and the winding core is used as a second datum line, and an included angle between the first datum line and the second datum line is 30-75 degrees.
2. The soft-package button battery according to claim 1, wherein the positive plate and the negative plate each have a first end and a second end along a length direction, the positive plate and the negative plate are wound from the first end to the second end to form the winding core, the positive tab is disposed at the end of the second end of the positive plate, and the negative tab is disposed at the end of the second end of the negative plate.
3. The soft-package button battery according to claim 1, wherein the winding core is of a cylindrical structure, and the positive tab and the negative tab are located in different radial directions of the winding core.
4. The soft-packaged button cell according to claim 1, wherein an included angle between the first reference line and the second reference line is 30-60 °.
5. The soft-packaged button battery according to claim 2, wherein the first end of the negative plate is located inside the first end of the positive plate, the second end of the negative plate is located outside the second end of the positive plate, and the length of the ending of the negative plate is greater than that of the ending of the positive plate.
6. The soft-packaged button battery according to claim 4, wherein the number of winding turns of the separator is greater than or equal to that of the negative plate;
the soft package button battery also comprises an aluminum-plastic film shell, and the winding core is positioned in the aluminum-plastic film shell;
the included angle between the first datum line and the second datum line is 30-45 degrees.
7. The soft-packaged button battery according to claim 1, wherein the distance between the projection position of the positive tab on the y-axis and the projection position of the negative tab on the y-axis is not less than 1mm, taking the first reference line as the x-axis and the horizontal line perpendicular to the first reference line as the y-axis.
8. The manufacturing method of the soft package button battery according to any one of claims 1 to 7 is characterized by comprising the following steps:
step S1: manufacturing a roll core: stacking a positive plate, a diaphragm and a negative plate in sequence and then winding the positive plate, the diaphragm and the negative plate to form a winding core, wherein the central connecting line of the positive tab and the winding core is used as a first datum line, the central connecting line of the negative tab and the winding core is used as a second datum line, and the included angle between the first datum line and the second datum line is controlled to be 30-75 degrees;
step S2: and (3) core packaging: and coating an aluminum-plastic film on the surface of the coiled core after coiling to obtain the battery.
9. The method for manufacturing the soft-packaged button cell according to claim 8, wherein the step S2 is further followed by:
step S3: liquid injection and activation: injecting electrolyte into the battery to activate the battery;
step S4: secondary packaging, shaping and folding: and after activation, carrying out secondary packaging on the battery, and then trimming the appearance of the battery through a blanking process to obtain the soft package button battery.
10. An electronic device, characterized by comprising the soft-packaged button cell according to any one of claims 1 to 7.
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| CN202111676550.1A CN114420994A (en) | 2021-12-31 | 2021-12-31 | Soft package button battery, manufacturing method thereof and electronic equipment |
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| CN202111676550.1A CN114420994A (en) | 2021-12-31 | 2021-12-31 | Soft package button battery, manufacturing method thereof and electronic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114976399A (en) * | 2022-05-20 | 2022-08-30 | 华勤技术股份有限公司 | Soft-package button cell module, sound production device and electronic equipment |
| CN115117567A (en) * | 2022-06-30 | 2022-09-27 | 南昌勤胜电子科技有限公司 | Steel shell button cell, sound generating device and electronic equipment |
| WO2024044973A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德新能源科技有限公司 | Electrochemical device and electric apparatus |
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2021
- 2021-12-31 CN CN202111676550.1A patent/CN114420994A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114976399A (en) * | 2022-05-20 | 2022-08-30 | 华勤技术股份有限公司 | Soft-package button cell module, sound production device and electronic equipment |
| CN114976399B (en) * | 2022-05-20 | 2024-01-26 | 华勤技术股份有限公司 | Soft package button cell module, sound generating mechanism and electronic equipment |
| CN115117567A (en) * | 2022-06-30 | 2022-09-27 | 南昌勤胜电子科技有限公司 | Steel shell button cell, sound generating device and electronic equipment |
| CN115117567B (en) * | 2022-06-30 | 2024-02-27 | 南昌勤胜电子科技有限公司 | Steel shell button cell, sound generating device and electronic equipment |
| WO2024044973A1 (en) * | 2022-08-30 | 2024-03-07 | 宁德新能源科技有限公司 | Electrochemical device and electric apparatus |
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