CN114927784A - Battery fine recycling method - Google Patents
Battery fine recycling method Download PDFInfo
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- CN114927784A CN114927784A CN202210351583.7A CN202210351583A CN114927784A CN 114927784 A CN114927784 A CN 114927784A CN 202210351583 A CN202210351583 A CN 202210351583A CN 114927784 A CN114927784 A CN 114927784A
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- battery
- cover plate
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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
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Manufacturing & Machinery (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a fine battery recycling method, which comprises the following steps: discharging the battery; separating the battery core and the cover plate from the shell; stripping off a film wrapped on the battery core; separate electric core and apron, include: unfolding the battery cell to expose the lug, cutting off the lug and separating the battery cell from the cover plate; and disassembling the battery cell, and recovering the positive plate and the negative plate. Make apron and electric core keep being connected earlier, utilize apron convenient and fast to take out electric core from the shell. And then stripping the film wrapped on the battery cell, unfolding the battery cell to two sides of the cover plate, and enabling a gap with sufficient width to be formed between the battery cell and the cover plate, so that the tab is conveniently cut off. And finally, reversely coiling the battery core, and disassembling to obtain a complete positive plate and a complete negative plate. The battery cell and the cover plate are thoroughly separated by stripping the film and unfolding the battery cell to provide better cutting conditions, the battery cell is not easy to cut, material loss is avoided, and safety risks caused by contact of the positive plate and the negative plate in the cutting process are avoided.
Description
Technical Field
The invention relates to the field of waste battery treatment, in particular to a battery fine recycling method.
Background
With the rapid development of new energy automobile industry, the number of waste automobile power batteries is increasing. The waste batteries contain a large amount of heavy metals, organic matters, electrolytes and toxic gases generated by conversion products of the heavy metals, the organic matters, the electrolytes and the toxic gases, and the waste batteries need to be recycled from the viewpoint of environmental protection and economic benefit.
The vehicle power battery generally comprises a battery core, a tab, a shell and the like. The battery cell is formed by winding a strip-shaped positive plate and a strip-shaped negative plate, and the positive plate and the negative plate are separated by a diaphragm. The shell comprises a shell body and a cover plate, wherein the shell body is used for accommodating two, four or more battery cells, the cover plate encapsulates the battery cells, and the positive plate and the negative plate of each battery cell are respectively connected with the cover plate through the lugs. In addition, each cell is coated with a mylar (mylar) film for further fixation.
The existing waste battery recovery method is relatively extensive, one part of the recovery method directly cuts and crushes the whole battery, the other part of the recovery method integrally cuts off two ends of the battery, then the battery core is pushed out of the shell, and then the battery core is cut and crushed. The battery core is easily cut in the process of integrally cutting off the two ends of the battery, so that the loss of positive and negative electrode materials is caused, and the safety risk caused by the contact of the positive electrode plate and the negative electrode plate may exist.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a battery fine recycling method.
The invention provides the following technical scheme:
a battery fine recycling method, comprising the steps of:
s0, discharging the battery;
s1, separating the battery cell and the cover plate from the shell;
s2, stripping the film wrapped on the battery cell;
s3, separating the battery cell and the cover plate;
s4, disassembling the battery cell, and recovering the positive plate and the negative plate;
wherein, step S3 includes:
s3-1, unfolding the battery cell to expose the tab;
and S3-2, cutting off the tab to separate the battery cell from the cover plate.
As a further alternative to the battery fine recycling method, the discharging the battery comprises:
the voltage of the battery is discharged to below 3V by a discharge device.
As a further alternative to the battery fine recycling method, step S1 includes:
s1-1, cutting the shell to separate the cover plate from the shell;
and S1-2, fixing the cover plate, and moving the shell to enable the battery cell to be separated from the shell.
As a further alternative to the fine battery recycling method, the cutting the case comprises:
the cutting edge of the cutter faces the side face of the shell, cuts into the shell from one end close to the cover plate and then moves along the circumferential direction of the cover plate.
As a further alternative to the fine battery recycling method, after step S1-2, the method further includes:
and S1-3, respectively collecting the shell and the electrolyte.
As a further optional solution to the battery fine recycling method, after peeling off the film wrapped on the battery core, the method further includes:
the film was collected.
As a further optional solution to the battery fine recycling method, the unfolding the battery cell includes:
one ends of the two battery cells far away from the cover plate deviate from each other, and the two battery cells are unfolded to two sides of the cover plate.
As a further alternative to the fine battery recycling method, after step S3-2, the method further includes;
and S3-3, collecting the cover plate.
As a further optional solution to the battery fine recycling method, the disassembling the battery cell includes:
and reversely coiling the battery core, and disassembling the battery core into a positive plate, a negative plate, an inner diaphragm and an outer diaphragm.
The embodiment of the invention has the following beneficial effects:
only separate apron and casing earlier, make apron and electric core keep being connected, make full use of apron easily centre gripping characteristics of putting forth effort before electric core and apron thoroughly separate take out electric core from the shell in convenient and fast. Then the electric cores are not connected into a whole by stripping the film wrapped on the electric cores, the electric cores are unfolded to two sides of the cover plate, and a gap which is wide enough is formed between the electric cores and the cover plate, so that the lugs are conveniently cut off, and the electric cores and the cover plate are thoroughly separated. And finally, reversely coiling the battery core, and disassembling to obtain a complete positive plate and a complete negative plate. The operation process is annularly buckled, better cutting conditions are provided for thorough separation of the battery core and the cover plate by stripping the film and unfolding the battery core, the battery core is not easy to cut, material loss is avoided, and safety risks caused by contact of the positive plate and the negative plate in the cutting process are avoided.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a general flow chart of a method for fine recycling of batteries according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating step S1 in the fine battery recycling method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating step S3 in a battery fine recycling method according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a cell after being unfolded in a fine battery recycling method according to an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a battery cell in a battery fine recycling method provided by an embodiment of the present invention.
Description of the main element symbols:
100-electric core; 110-inner membrane; 120-negative pole piece; 130-outer membrane; 140-positive plate; 200-pole ear; 300-cover plate.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Examples
Referring to fig. 1, the present embodiment provides a method for finely recycling batteries, which is used to recycle waste batteries. In the present embodiment, the waste battery is a lithium battery, and particularly, a power battery for a vehicle, including but not limited to a passenger car, a commercial car, an electric bicycle, etc. In other embodiments of the present application, the waste battery may also be a mobile phone battery or the like.
The vehicle power battery includes a battery core 100 (see fig. 5), a tab 200 (see fig. 5), and a housing. The battery cell 100 is formed by winding a strip-shaped positive electrode sheet 140 (see fig. 5) and a strip-shaped negative electrode sheet 120 (see fig. 5), and the positive electrode sheet 140 and the negative electrode sheet 120 are separated by a separator. The aluminum housing is composed of a casing and a cover plate 300 (see fig. 5), two battery cells 100 are accommodated in the casing, the cover plate 300 encapsulates the battery cells 100 in the casing after the battery cells 100 are placed in the casing, and the positive electrode plate 140 and the negative electrode plate 120 of each battery cell 100 are respectively connected with the cover plate 300 through the tabs 200. In addition, the two battery cells 100 are covered with a thin film, and in this embodiment, the thin film is a mylar (mylar) film.
Specifically, the fine battery recycling method comprises the following steps:
and S0, discharging the battery.
Specifically, the voltage of the battery is discharged to below 3V by the discharging device, and the battery capacity is near zero.
In this embodiment, the discharge is stopped when the voltage of the battery is about 2.7V.
By discharging the battery, lithium in the battery is returned to the positive electrode sheet 140 again, facilitating subsequent recycling. In addition, the battery disassembly process is safer in the subsequent battery disassembly process.
The existing waste battery recovery method adopts the mode of placing the battery in brine to discharge the battery, but the brine discharge period is long, the efficiency is low, and pollution can be generated. Compared with the prior art, the battery discharging method has the advantages that the efficiency of discharging the battery by using the discharging equipment is higher, the pollution is less, and the method is suitable for industrial batch recovery of the waste battery.
And S1, separating the battery cell 100 and the cover plate 300 from the shell.
Please refer to fig. 2, which includes the following steps:
s1-1, the housing is cut to separate the cover 300 from the case.
Specifically, in the present embodiment, the case is cut with a cutter such that the cutting edge of the cutter faces the side of the case and is cut into the case from the end of the case close to the cover 300, and then moved in the circumferential direction of the cover 300, thereby separating the cover 300 from the case.
In another embodiment of the present application, a plurality of cutting blades may be disposed around the housing, and the plurality of cutting blades may be cut into each side of the housing, respectively, to completely cut the housing, thereby separating the cover plate 300 from the housing.
The dust generated when the cover plate 300 is cut off by the cutter is less, and the purchase cost and the maintenance cost are low.
In a specific embodiment of the present embodiment, the cover plate 300 is only disposed at one end of the casing, and the positive electrode tab 140 and the negative electrode tab 120 of the two battery cells 100 are connected to the cover plate 300 through the tab 200.
In another specific implementation manner of this embodiment, the cover plates 300 may also be disposed at two ends of the casing, the positive electrode plates 140 of the two battery cells 100 are connected to one of the cover plates 300 through the tabs 200, and the negative electrode plates 120 of the two battery cells 100 are connected to the other cover plate 300 through the tabs 200. At this time, two cover plates 300 need to be cut off from the housing by a cutter.
And S1-2, fixing the cover plate 300, and moving the shell to enable the battery cell 100 to be pulled out of the shell.
The conventional method for recycling the waste batteries cuts the side surface of the casing, and completely cuts off the end of the casing, so that the cover plate 300 is separated from the casing, and the cover plate 300 is also separated from the battery core 100. However, the distance between the battery cell 100 and the cover plate 300 is small, the requirement for positioning accuracy during cutting is high, the battery cell 100 is easily cut, the material loss is caused, and there may be a safety risk caused by the contact between the positive electrode tab 140 and the negative electrode tab 120. In addition, the battery cell 100 disconnected from the cover plate 300 is difficult to exert force, the difficulty in taking out the battery cell 100 from the casing is increased, the other end of the casing is often required to be cut off, then the battery cell 100 is pushed out from the casing, the battery cell 100 is also easy to cut, the material loss is caused, and the safety risk caused by the contact between the positive electrode plate 140 and the negative electrode plate 120 may exist.
In contrast, only by cutting the cover plate 300 from the casing, the battery cell 100 is not easily cut, and the battery cell 100 can be conveniently and quickly removed from the casing after the cutting is completed, so that the material loss is avoided, and the safety risk caused by the contact between the positive plate 140 and the negative plate 120 during the cutting process is eliminated.
In particular, since the battery cell 100 is wrapped with a mylar film, and the mylar film is stained with an electrolyte, the friction force between the battery cell 100 and the casing is small, and the battery cell 100 is easily separated from the casing.
And S1-3, respectively collecting the shell and the electrolyte.
And S2, stripping off the mylar film wrapped on the battery cell 100, and collecting the mylar film.
Specifically, when the mylar film is to be peeled off, the mylar film is firstly melted by using the heating wire, and then the mylar film is separated from the two battery cells 100.
When the mylar film is fused by the heating wire, the mylar film is not influenced by the flexibility of the mylar film, the edge of the mylar film is not required to be found, and the mylar film can be fused quickly and effectively.
S3, separating the battery cell 100 and the cover plate 300.
Please refer to fig. 3, which includes the following steps:
and S3-1, unfolding the battery cell 100 to expose the tab 200.
Referring to fig. 4, specifically, after the mylar film is peeled off, the two battery cells 100 are not connected to each other. One ends of the two battery cells 100 away from the cover plate 300 are separated from each other, and the two battery cells 100 are unfolded to two sides of the cover plate 300. At this time, one ends of the two battery cells 100 close to the cover plate 300 are still connected to the cover plate 300 through the tabs 200, and the tabs 200 are exposed to the outside.
And S3-2, cutting off the tab 200 to separate the battery cell 100 from the cover plate 300.
Specifically, the tab 200 is cut off by a cutter along the dotted line in the figure, and the connection between the battery cell 100 and the cover plate 300 is broken.
In another specific embodiment of the present application, the number of the battery cells 100 enclosed in the casing is four. The four battery cells 100 are divided into two groups, each group includes two battery cells 100, and the two battery cells 100 in the same group are stacked together. The two groups of battery cells 100 are respectively unfolded to two sides of the cover plate 300, the tabs 200 are cut off first, so that the two groups of battery cells 100 are respectively separated from the cover plate 300, and then the two battery cells 100 in the same group are separated.
As described above, the conventional method of recycling the used batteries cuts the side of the case and completely cuts off the end of the case, thereby disconnecting the cap plate 300 from the battery cell 100. However, the distance between the battery cell 100 and the cover plate 300 is small, the requirement for positioning accuracy during cutting is high, the battery cell 100 is easily cut, the material loss is caused, and there may be a safety risk caused by the contact between the positive electrode tab 140 and the negative electrode tab 120.
In contrast, a wider gap exists between the unfolded battery cell 100 and the cover plate 300, and the width of the gap is equal to the length of the middle part of the tab 200, which is not connected with the battery cell 100 and the cover plate 300, so that the requirement on the positioning accuracy is much lower, the cutter is not easy to cut into the battery cell 100, the material loss is avoided, and the safety risk caused by the contact between the positive plate 140 and the negative plate 120 in the cutting process is avoided.
And S3-3, collecting the cover plate 300.
And S4, disassembling the battery cell 100 and recovering the positive plate 140 and the negative plate 120.
Referring to fig. 5, the battery cell 100 is formed by winding a band-shaped inner separator 110, a band-shaped negative electrode sheet 120, a band-shaped outer separator 130, and a band-shaped positive electrode sheet 140 in a clockwise direction, and the inner separator 110, the negative electrode sheet 120, the band-shaped outer separator 130, and the band-shaped positive electrode sheet 140 are sequentially stacked. The outer-layer diaphragm 130 separates the cathode plates 120 and the anode plates 140 in the same circle, and the inner-layer diaphragm 110 separates the anode plates 140 and the cathode plates 120 in two adjacent circles, specifically, separates the anode plates 140 in the inner circle from the cathode plates 120 in the outer circle.
In addition, the inner separator 110, the negative electrode sheet 120, the outer separator 130, and the positive electrode sheet 140 each have a winding end and a terminating end. The terminating ends of the inner separator 110, the negative electrode sheet 120, the outer separator 130, and the positive electrode sheet 140 are staggered, and the winding is finished at different positions.
In the present embodiment, the positive electrode sheet 140, the negative electrode sheet 120, the inner-layer separator 110, and the outer-layer separator 130 are sequentially wound.
Specifically, when the battery cell 100 is disassembled, the battery cell 100 is reversely wound and disassembled into the positive electrode sheet 140, the negative electrode sheet 120, the inner-layer diaphragm 110 and the outer-layer diaphragm 130, and then the positive electrode sheet 140, the negative electrode sheet 120, the inner-layer diaphragm 110 and the outer-layer diaphragm 130 are collected.
The terminating end of the outer membrane 130 is separated from the main body of the electrical core 100, the outer membrane 130 is disassembled from the electrical core 100 in the counterclockwise direction, and the outer membrane 130 is collected.
After the terminal end of the inner membrane 110 is exposed, the terminal end of the inner membrane 110 is separated from the main body of the battery cell 100, the inner membrane 110 is disassembled from the battery cell 100 in the counterclockwise direction, and the inner membrane 110 is collected.
After the terminating end of the negative electrode tab 120 is exposed, the terminating end of the negative electrode tab 120 is separated from the main body of the battery cell 100, the negative electrode tab 120 is disassembled from the battery cell 100 in the counterclockwise direction, and the negative electrode tab 120 is collected.
After the terminal end of the positive electrode tab 140 is exposed, the terminal end of the positive electrode tab 140 is separated from the main body of the battery cell 100, the positive electrode tab 140 is disassembled from the battery cell 100 in the counterclockwise direction, and the positive electrode tab 140 is collected.
Thereafter, the positive electrode sheet 140, the negative electrode sheet 120, the inner separator 110, and the outer separator 130 are disassembled at the same time, and the positive electrode sheet 140, the negative electrode sheet 120, the inner separator 110, and the outer separator 130 are collected, respectively.
The existing waste battery recovery method directly cuts and breaks the battery core 100 into a plurality of small pieces. The positive plate 140 and the negative plate 120 in the small block are not separated, so that the subsequent recovery process is complicated, the recovery efficiency is low, and the recovery cost is high. In contrast, after the battery cell 100 is rewound, the independent and complete positive plate 140 and the negative plate 120 can be obtained, which is beneficial to subsequent recovery processing, and has higher recovery efficiency for precious metals and lower recovery cost.
When the above battery fine recycling method is used to recycle the waste batteries, the cover plate 300 is separated from the casing, so that the cover plate 300 is connected with the battery cell 100, and the battery cell 100 can be conveniently and quickly removed from the casing by fully utilizing the characteristic that the cover plate 300 is easy to clamp before the battery cell 100 is completely separated from the cover plate 300. Then, the two battery cells 100 are not connected into a whole by stripping off the mylar film, and the battery cells 100 are unfolded to two sides of the cover plate 300, so that a gap with a sufficient width is formed between the battery cells 100 and the cover plate 300, thereby facilitating the cutting of the tab 200 by the cutter, and completely separating the battery cells 100 from the cover plate 300. And finally, rewinding the battery cell 100, and disassembling to obtain the complete positive plate 140 and the complete negative plate 120.
The above operation processes are annularly buckled, and a better cutting condition is provided for the thorough separation of the battery core 100 and the cover plate 300 by stripping the mylar film and unfolding the battery core 100, so that the cutter is not easy to cut the battery core 100, thereby avoiding material loss and avoiding safety risks caused by the contact of the positive plate 140 and the negative plate 120 in the cutting process.
In addition, the whole battery is finely disassembled, the shell, the electrolyte, the mylar film, the cover plate 300, the positive plate 140, the negative plate 120 and the diaphragm can be recycled, the recycling difficulty is low, and the residual waste is less, so that the pollution to the environment is reduced, and the economic benefit is improved.
In all examples shown and described herein, any particular value should be construed as exemplary only and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A battery fine recycling method is characterized by comprising the following steps:
s0, discharging the battery;
s1, separating the battery cell and the cover plate from the shell;
s2, stripping the film wrapped on the battery cell;
s3, separating the battery cell and the cover plate;
s4, disassembling the battery cell, and recovering the positive plate and the negative plate;
wherein, step S3 includes:
s3-1, unfolding the battery cell to expose the tab;
and S3-2, cutting off the tab to separate the battery cell from the cover plate.
2. The battery fine recycling method of claim 1, wherein the discharging the battery comprises:
the voltage of the battery is discharged to below 3V with a discharge device.
3. The battery fine recycling method according to claim 1, wherein the step S1 includes:
s1-1, cutting the shell to separate the cover plate from the shell;
s1-2, fixing the cover plate, and moving the shell to enable the battery cell to be pulled out of the shell.
4. The battery fine recycling method of claim 3, wherein the cutting the housing comprises:
the cutting edge of the cutter faces the side face of the shell, cuts into the shell from one end close to the cover plate and then moves along the circumferential direction of the cover plate.
5. The battery fine recycling method according to claim 3, further comprising, after the step S1-2:
and S1-3, respectively collecting the shell and the electrolyte.
6. The fine recycling method of the battery according to claim 1, further comprising, after the peeling off the film wrapped on the battery cell:
the film was collected.
7. The battery fine recycling method of claim 1, wherein the expanding the cells comprises:
and enabling one ends of the battery cells far away from the cover plate to deviate from each other, and unfolding the battery cells to two sides of the cover plate.
8. The fine battery recycling method according to claim 1, further comprising, after step S3-2;
and S3-3, collecting the cover plate.
9. The fine battery recycling method of claim 1, wherein the disassembling the battery cell comprises:
and reversely winding the battery core, and disassembling the battery core into a positive plate, a negative plate, an inner diaphragm and an outer diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351583.7A CN114927784A (en) | 2022-04-02 | 2022-04-02 | Battery fine recycling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210351583.7A CN114927784A (en) | 2022-04-02 | 2022-04-02 | Battery fine recycling method |
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| CN114927784A true CN114927784A (en) | 2022-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826187A (en) * | 2023-08-25 | 2023-09-29 | 星恒电源股份有限公司 | Polar group repairing method |
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2022
- 2022-04-02 CN CN202210351583.7A patent/CN114927784A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116826187A (en) * | 2023-08-25 | 2023-09-29 | 星恒电源股份有限公司 | Polar group repairing method |
| CN116826187B (en) * | 2023-08-25 | 2023-11-03 | 星恒电源股份有限公司 | Polar group repairing method |
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