CN217086651U - Soft packet of button cell, electronic equipment - Google Patents
Soft packet of button cell, electronic equipment Download PDFInfo
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- CN217086651U CN217086651U CN202123451209.4U CN202123451209U CN217086651U CN 217086651 U CN217086651 U CN 217086651U CN 202123451209 U CN202123451209 U CN 202123451209U CN 217086651 U CN217086651 U CN 217086651U
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Abstract
For overcoming current button cell and appearing the end noise because of producing the electromagnetic field, reduce product quality's problem, the utility model provides a soft packet of button cell. 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 utility model also provides an electronic equipment including above-mentioned soft packet of button cell. The utility model provides a soft packet of button cell is 30 ~ 75 through the contained angle of control just, the negative pole ear, and then the length difference when reducing positive plate and negative pole piece ending to make the magnetic field that positive plate and negative pole piece produced can further offset, slow down end noise phenomenon.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, concretely relates to soft packet of button cell, 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.
SUMMERY OF THE UTILITY MODEL
To current button cell because of producing the electromagnetic field and appearing the end and making an uproar, reduce product quality's problem, the utility model provides a soft packet of button cell, electronic equipment.
The utility model provides an above-mentioned technical problem adopted technical scheme as follows:
on one hand, the utility model 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 electronic equipment comprising the soft package button battery.
The utility model has the advantages that: the utility model provides a soft packet of button cell, contained angle through control positive tab and negative pole ear is less than 75, reduce the length difference of negative plate and positive plate in ending department, thereby reduce the electromagnetic field intensity difference that positive plate and negative plate produced, can reduce or eliminate the battery and roll up the interference magnetic field that the core produced at the during operation, effectively improve equipment end noise phenomenon, and simultaneously, the contained angle of control positive tab and negative pole ear is greater than 30, avoid just, the negative pole ear is too close to the problem that leads to the battery preparation technology degree of difficulty to increase, be fit for extensive industrial production.
Drawings
Fig. 1 is a schematic view of a partial structure of a winding core provided by an embodiment of the present invention;
fig. 2 is an external view of a winding core provided by an embodiment of the present invention;
fig. 3 is an external view schematically illustrating a core packaging process according to an embodiment of the present 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 problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. 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 drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions 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 present 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 diaphragm 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.
The utility model provides a soft packet of button cell, contained angle through control positive tab 111 and negative pole tab 121 is less than 75, reduce the length difference of negative plate 12 and positive plate 11 in the department of ending, thereby reduce the electromagnetic field intensity difference that positive plate 11 and negative plate 12 produced, can reduce or eliminate the battery and roll up the interference magnetic field that core 1 produced at the during operation, effectively improve equipment end noise phenomenon, and simultaneously, the contained angle of control positive tab 111 and negative pole tab 121 is greater than 30, avoid positive tab 111 and negative pole tab 121 too to be close to the problem that leads to the battery preparation technology degree of difficulty to increase, be fit for extensive 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 first datum line and the second datum line is, the smaller the interference magnetic field that core 1 produces is, the smaller the influence to load electronic equipment is, however, the included angle between first datum line and the second datum line is too small, make positive tab and negative tab both too near, be unfavorable for battery preparation on the one hand, increase the technology degree of difficulty, reduce production efficiency, can't carry out large-scale industrial production, on the other hand, after the battery is charged, core 1 can take place the inflation of certain degree, if positive tab and negative tab's distance is too near, receive extrusion force and lead to the pole piece to appear the bad conditions such as short circuit, fracture in the junction of positive tab and negative tab because core 1 inflation extrusion force easily. 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 datum line and the second datum 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 datum line and the second datum line is 30-45 degrees, and the applicant researches and discovers that when the included angle between the first datum line and the second datum line is smaller than 45 degrees, the lower bottom noise decibel of 1000Hz-5000Hz fixed frequency generated by the load equipment can be mostly reduced to be less than 5dB, so that 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 utility model provides a still provide above-mentioned soft packet of button cell's manufacturing method, including following step:
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 described with reference to the following examples.
Example 1
Referring to fig. 1, this embodiment is used for explaining the soft-packaged button battery and the 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
This embodiment is used for explaining the utility model discloses a soft packet of button cell and preparation method thereof, including the most operation of embodiment 1, its difference only lies in, and the contained angle alpha between first datum line and the second datum line is 45.
Comparative example 1
This comparison example is used for comparing and explaining the utility model discloses a soft packet of button cell and preparation method thereof, including the most operation of embodiment 1, its difference only lies in, and the contained angle alpha between first datum line and the second datum 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 shown in fig. 4 to 6, 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 can be effectively weakened, the bottom noise decibel of the load device at a fixed frequency of 1000Hz to 5000Hz can be mostly reduced to be less than 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 production, slows down the end noise phenomenon.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
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. An electronic device, characterized by comprising the soft-packaged button cell according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123451209.4U CN217086651U (en) | 2021-12-31 | 2021-12-31 | Soft packet of button cell, electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123451209.4U CN217086651U (en) | 2021-12-31 | 2021-12-31 | Soft packet of button cell, electronic equipment |
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| CN217086651U true CN217086651U (en) | 2022-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420994A (en) * | 2021-12-31 | 2022-04-29 | 曙鹏科技（深圳）有限公司 | Soft package button battery, manufacturing method thereof and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114420994A (en) * | 2021-12-31 | 2022-04-29 | 曙鹏科技（深圳）有限公司 | Soft package button battery, manufacturing method thereof and electronic equipment |
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