CN113471642B - Negative electrode protection assembly, negative electrode protection battery and negative electrode protection method - Google Patents
Negative electrode protection assembly, negative electrode protection battery and negative electrode protection method Download PDFInfo
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- CN113471642B CN113471642B CN202110364890.4A CN202110364890A CN113471642B CN 113471642 B CN113471642 B CN 113471642B CN 202110364890 A CN202110364890 A CN 202110364890A CN 113471642 B CN113471642 B CN 113471642B
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- negative electrode
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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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
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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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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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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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application belongs to the technical field of storage battery production, and particularly relates to a negative electrode protection assembly, a negative electrode protection battery and a negative electrode protection method, wherein the protection assembly comprises a plurality of buckles and a fiber cover plate, and the fiber cover plate has a liquid adsorption function and can be covered on a negative electrode busbar; the buckle is inserted and fixed from the side face of the negative electrode busbar, and the fiber cladding plate is fixed on the periphery of the negative electrode busbar and the lug. The negative electrode protection component can ensure the close fit between the fiber cladding plate and the bus bar, and can prevent the displacement of the fiber cladding plate due to the impact of acid liquor in the acid injection process. The negative electrode protection component is used for the negative electrode protection battery, and the fiber shroud plate absorbs acid liquor to create a protection environment for the negative electrode, so that the corrosion of the negative electrode is avoided.
Description
Technical Field
The application belongs to the technical field of storage battery manufacturing, and particularly relates to a negative electrode protection assembly, a negative electrode protection battery and a negative electrode protection method.
Background
When the sealed lead-acid storage battery is used, most of the time is in a charging state, while in the charging state, the cathode of the battery is in a reduced state, and the potential is Pb/PbSO 4 At equilibrium potential (-0.87V), lead in the negative electrode does not undergo oxidation corrosion, a phenomenon called cathodic protection. In acid liquor, the negative plate is always in Pb/PbSO 4 At the equilibrium potential of (2), the potential does not shift. Above the liquid level of the acid solution, the potential of the acid solution gradually becomes positive along with the rise of the height, the cathodic protection effect gradually weakens, and the potential of the acid solution is as followsUpon rising to an equilibrium potential, cathodic protection is disabled and corrosion occurs.
In the sealed lead-acid storage battery, the tab and the busbar are not immersed in acid liquor, but the part adjacent to the separator can still be in a cathode protection state due to acid climbing phenomenon, but the acid climbing gradually weakens along with the increase of the distance between the tab and the separator, the potential gradually moves forward, and when the potential is higher than Pb/PbSO 4 At equilibrium potential (about 1-2 cm in height), cathodic protection is lost and anodic corrosion occurs.
Disclosure of Invention
The application aims to provide a negative electrode protection assembly which can stably cover a negative electrode busbar and a negative electrode lug of a storage battery, prevent a negative electrode from being exposed, and provide a protection environment for the negative electrode so as to prevent the corrosion of the negative electrode.
In order to achieve the above purpose, the present application provides the following technical solutions: the negative electrode protection component comprises a plurality of buckles and a fiber cover plate, wherein the fiber cover plate has a liquid adsorption function and can be covered on a negative electrode busbar and a negative electrode lug; the buckle comprises an upper buckle plate, a lower buckle plate and a side buckle plate connected with the upper buckle plate and the lower buckle plate, and the upper buckle plate, the side buckle plate and the lower buckle plate enclose a flat-arranged n-shaped clamping opening; the buckle is inserted and fixed from the side face of the negative electrode busbar, the upper buckle plate, the side buckle plate and the lower buckle plate squeeze the fiber covering plate, and the fiber covering plate is fixed on the periphery of the negative electrode busbar and the periphery of the electrode lug.
In the above technical scheme, the fiber cladding plate has the property of adsorbing acid liquor, after the fiber cladding plate is covered on the busbar and the negative electrode lug, the fiber cladding plate soaked with the acid liquor can provide a protective environment for the negative electrode busbar and the negative electrode lug, so that corrosion of the negative electrode lug and the negative electrode busbar is reduced, the arranged buckle can be clamped on the negative electrode busbar and fix the fiber cladding plate, and therefore, the tight fit of the fiber cladding plate and the busbar can be ensured, and the displacement of the fiber cladding plate due to the impact of the acid liquor in the acid injection process can be prevented.
Preferably, the buckle is provided with a pressing arm extending along the width direction of the upper buckle plate, and the pressing arm presses the fiber cladding plate, so that the influence of the buckle on the pickling of the fiber cladding plate is reduced, the pressing arm is used for improving the application width of the whole buckle, and the width of the buckle main body is reduced, so that the coverage area of the buckle is reduced.
Preferably, a hook body pointing to the inside of the clamping opening is arranged at the front end part of the lower buckle plate, and after the buckle is inserted and fixed on the negative electrode busbar, the hook body is clamped on the side surface of the negative electrode busbar, so that the buckling strength of the buckle and the negative electrode busbar is increased, and the buckle is prevented from falling off.
Preferably, the lower buckle plate is tilted upwards towards the clamping opening, and after clamping, the lower buckle plate can have pretightening force due to deformation, so that the fiber cladding plate can be tightly attached to the negative electrode busbar, and the problem of size difference between the buckle and the negative electrode busbar is solved. And the width of the lower buckle plate from the rear end to the front end is gradually narrowed, when the buckle is clamped with the negative electrode busbar from the side face, the lower buckle plate is not easy to contact with the negative electrode tab because of the small front end, so that the clamping efficiency of the buckle can be improved, and the damage probability of the negative electrode tab can be reduced.
Preferably, the front end and the rear end of the fiber sheathing panel are respectively provided with a shearing cut, so that the front end and the rear end form a plurality of independent covering strips, and the two ends of the fiber sheathing panel can flexibly adapt to the shape of the bus bar, so that the coverage area is increased as much as possible.
Preferably, the fiber cover plate comprises a cover layer I, a cover layer II and an inner interlayer arranged between the cover layer I and the cover layer II, and a plurality of grooves or holes are arranged on the inner interlayer.
Preferably, the surface of the fiber cladding plate is provided with criss-cross rib lines, the rib lines compress the fiber cladding plate distributed along the path of the rib lines, so that the surface of the whole fiber cladding plate is in a grid shape, and acid liquor in each grid area cannot easily flow away under the action of the rib lines, thereby increasing the solid-liquid capacity of the fiber cladding plate.
Another object of the present application is to provide a negative electrode protection battery, in which the negative electrode is in a cathode protection environment, so that the problem of corrosion of the negative electrode can be effectively solved.
In order to achieve the above purpose, the present application provides the following technical solutions: the battery is a storage battery, a positive electrode tab and a negative electrode tab of the battery are respectively connected with a positive electrode bus bar and a negative electrode bus bar, and the negative electrode bus bar and the negative electrode tab of the battery are provided with the negative electrode protection component; the fiber cladding plate is covered on the negative electrode busbar and the negative electrode lug, and the buckle is buckled with the negative electrode busbar to compress the fiber cladding plate; and the fiber cladding plate is internally soaked with electrolyte. The fiber cladding plate is fixed on the negative electrode busbar through the buckle, and the fiber cladding plate absorbs acid liquor to create a protective environment for the negative electrode, so that the corrosion of the negative electrode is avoided.
The application also provides a negative electrode protection method, which solves the technical defect that the existing storage battery negative electrode is easy to corrode by using the method, in the early production stage of the valve-controlled sealed storage battery, a fiber covering plate with proper size is covered on the surface of a negative electrode busbar, and the fiber covering plate is scattered and covered at a shearing seam according to the specific shape of the busbar, so that all areas which can be covered by the front end and the rear end of the fiber covering plate through deformation covers; after the fiber cladding plate is attached to the bus bar and the lugs, the bus bar is buckled side by using a plurality of buckles, so that the fiber cladding plate is fixed; and (3) performing an acid filling process on the battery, enabling electrolyte to flow through the fiber cover plate, and enabling the fiber cover plate to absorb the electrolyte. The anti-corrosion method is simple to operate and low in cost, can inhibit the oxidation reaction of the negative alloy lead, reduces the failure rate of the battery, and improves the quality of the battery.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic structural view of a buckle in an embodiment of a negative electrode protection assembly;
FIG. 2 is a schematic view of the overall structure of a cover layer in an embodiment of a negative electrode protection assembly;
FIG. 3 is a schematic view of a partially cut-away structure of the cover layer of FIG. 2;
FIG. 4 is a schematic view of an installation of the anode protection assembly;
fig. 5 is a schematic view of a usage mode of the negative electrode protection assembly.
In the figure, an upper buckle plate 1, a side buckle plate 2, a lower buckle plate 3, a clamping hook 4, an upper pressing arm, a lower pressing arm 6, a fiber cover plate 7, a storage battery 9, a cover body 10, a battery cell 11, a negative electrode tab 12, a negative electrode busbar 13, a safety valve port 14, a negative electrode column 15, a positive electrode column 16, a buckle 18, acid liquor 19, a cavity 20, a shear cut 71, a transverse rib 72, a longitudinal rib 73, a cover layer I74, an inner interlayer 75, a retention hole 76 and a cover layer II77.
Detailed Description
The following detailed description of embodiments of the present application will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present application can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.
Fig. 1-3 show an embodiment of the anode protection assembly provided in the present application, wherein the same group of anode protection assemblies includes two buckles 18 having two fiber cover plates 7 and one fiber cover plate 7, wherein the fiber cover plates 7 have a liquid absorbing function and can cover the anode bus bar 13 and the anode tab 12;
the buckle is used for being clamped on the negative electrode busbar and fixing the fiber cladding plate 7, and comprises an upper buckle plate 1, a lower buckle plate 3 and a side buckle plate 2 for connecting the upper buckle plate 1 with the lower buckle plate 3, wherein the upper buckle plate 1, the side buckle plate 2 and the lower buckle plate 3 are enclosed to form a flat arrangementThe lower buckle plate 3 is tilted upwards towards the clamping opening, and after clamping, the lower buckle plate 3 has pretightening force due to deformation. The buckle 18 is inserted and fixed from the side of the cathode busbar 13, wherein the lower buckle 3 passes through between adjacent cathode lugs, and the width of the lower buckle 3 from the rear end to the front end is gradually narrowed in order to avoid damaging the cathode lugs. In order to further improve the locking stability of the buckle, a hook 4 pointing to the inside of the locking opening is arranged at the front end part of the lower buckle plate 3, and after the buckle 18 is inserted and fixed on the negative electrode busbar 13, the hook 4 is locked on the side surface of the negative electrode busbar 13.
In addition, an upper pressing arm 5 and a lower pressing arm 6 are respectively arranged at the front end of the upper buckle plate 1 and the connection position between the side buckle plate 2 and the side buckle plate 2 of the buckle 18, the two pressing arms extend along the width direction of the upper buckle plate 1, the upper pressing arm 5 and the lower pressing arm 6 can press the fiber sheathing panel 7, the application width of the whole buckle is increased through the pressing arms, the width of the main body of the buckle 18 is reduced, and the coverage area of the buckle 18 is reduced, so that the fiber sheathing panel 7 is in full contact with acid liquor.
Regarding the fiber sheathing panel 7, the present application comprehensively considers the coverage area and the solid-liquid performance thereof, and the following design is made for the structure: because the negative electrode bus bar is finally connected with the negative electrode post, in order to avoid that the joint influences the spreading of the fiber covering plate 7, the front end and the rear end of the fiber covering plate 7 are respectively provided with the shearing slits 71, so that a plurality of independent covering strips are formed at the front end and the rear end, the two ends of the fiber covering plate 7 can flexibly adapt to the shape of the bus bar, and the coverage area is increased as much as possible; with a multi-layer design, the fiber sheathing panel 7 comprises a cover layer I74 and a cover layer II77, and an inner interlayer 75 arranged between the cover layer I74 and the cover layer II77, and a plurality of grooves or holes are arranged on the inner interlayer 75; the solid-liquid area is divided, transverse rib lines 72 and longitudinal rib lines 73 which are crisscrossed (sewn) are arranged on the surface of the fiber cladding 7, the fiber cladding 7 distributed along the path of the rib lines is tightly pressed by the rib lines, the surface of the whole fiber cladding 7 is in a grid shape, and acid liquor in each grid area cannot flow away easily under the action of the rib lines, so that the solid-liquid capacity of the fiber cladding 7 is improved.
In this embodiment, the fiber cover plate 7 has the property of adsorbing acid solution, after the fiber cover plate 7 is covered on the busbar, the fiber cover plate 7 soaked with the acid solution can provide a protective environment for the negative electrode busbar and the negative electrode tab, so that corrosion of the negative electrode tab and the negative electrode busbar is reduced, the set buckle 18 can be clamped on the negative electrode busbar and fix the fiber cover plate 7, which not only can ensure close adhesion of the fiber cover plate 7 and the busbar, but also can prevent displacement of the fiber cover plate 7 due to impact of the acid solution in the acid injection process.
Based on the above-mentioned negative electrode protection component, the present application provides an embodiment of a negative electrode protection battery, the battery is a storage battery 9, a positive electrode tab and a negative electrode tab 12 of a battery core 11 in the battery are respectively connected with a positive electrode bus bar and a negative electrode bus bar 13, and the positive electrode bus bar and the negative electrode bus bar 13 are respectively connected with a positive electrode post 15 and a negative electrode post 16, as shown in fig. 4, a cavity 20 is formed above the negative electrode bus bar 13, and in the space, the above-mentioned negative electrode protection component is arranged on the negative electrode bus bar 13 and the negative electrode tab 12 of the battery (as shown in fig. 4); the fiber cladding plate 7 is covered on the negative electrode busbar 13 and the negative electrode lug 12, and the buckle 18 is buckled with the negative electrode busbar 13 to compress the fiber cladding plate 7; the fiber sheathing panel 7 is impregnated with an electrolyte. The fiber cladding plate 7 is fixed on the negative electrode busbar through the buckle 18, and the fiber cladding plate 7 absorbs acid liquor to create a protective environment for the negative electrode, so that the corrosion of the negative electrode is avoided.
In addition, through the above study, the application also provides a negative electrode protection method, which solves the technical defect that the existing storage battery negative electrode is easy to corrode by using the method, in the early production stage of the valve-controlled sealed storage battery, a fiber cover plate 7 with proper size is covered on the surface of a negative electrode busbar, and according to the specific shape of the busbar, the fiber cover plate 7 is scattered and covered on a shearing joint 71, so that all areas which can be covered by the front end and the rear end of the fiber cover plate 7 through deformation covers; after the fiber cladding 7 is attached to the bus bar and the lugs, the bus bar is buckled side by using a plurality of buckles 18, so that the fiber cladding 7 is fixed; the battery is subjected to an acid filling process, and an acid solution 19 is injected into the battery through the safety valve port 14, so that the electrolyte flows through the fiber sheathing 7, and the fiber sheathing 7 adsorbs the electrolyte, as shown in fig. 5. By adding the method in the production process of the battery, the environment is protected at the cathode, so that the battery is prevented from being corroded in the use process.
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.
Claims (6)
1. A negative electrode protection assembly, characterized in that: the device comprises a plurality of buckles and a fiber cover plate, wherein the fiber cover plate has a liquid adsorption function and can be covered on a negative bus bar; the buckle comprises an upper buckle plate, a lower buckle plate and a side buckle plate connected with the upper buckle plate and the lower buckle plate, and the upper buckle plate, the side buckle plate and the lower buckle plate enclose a flat-arranged n-shaped clamping opening; the buckle is inserted and fixed from the side face of the negative electrode busbar, the upper buckle plate, the side buckle plate and the lower buckle plate squeeze the fiber covering plate, and the fiber covering plate is fixed on the periphery of the negative electrode busbar and the lug; the front end and the rear end of the fiber cover plate are respectively provided with a shearing cut so that a plurality of independent cover strips are formed at the front end and the rear end; the fiber cladding plate comprises a cladding layer I, a cladding layer II and an inner interlayer arranged between the cladding layer I and the cladding layer II, and a plurality of groove bodies are arranged on the inner interlayer; and crisscrossed rib wires are arranged on the surface of the fiber cladding plate, and the rib wires compress the fiber cladding plate distributed along the path of the rib wires so that the surface of the whole fiber cladding plate is in a grid shape.
2. The anode protection assembly of claim 1, wherein: the buckle is provided with a pressing arm extending along the width direction of the upper buckle plate, and the pressing arm presses the fiber sheathing board.
3. The anode protection assembly of claim 1, wherein: the front end part of the lower buckle plate is provided with a hook body pointing to the inside of the clamping opening, and when the buckle is inserted and fixed on the negative electrode busbar, the hook body is clamped on the side surface of the negative electrode busbar.
4. The anode protection assembly of claim 2, wherein: the lower buckle plate is tilted upwards towards the clamping opening, the width of the lower buckle plate from the rear end to the front end is gradually narrowed, and the lower buckle plate can be inserted between two adjacent lugs.
5. The utility model provides a negative pole protection battery, this battery is the battery, and positive electrode tab and the negative electrode tab of electric core connect positive bus bar and negative electrode bus bar respectively, its characterized in that: the negative electrode bus bar and the negative electrode tab of the battery are provided with the negative electrode protection assembly of any one of claims 1-4; the fiber cladding plate is covered on the negative electrode busbar and the negative electrode lug, and the buckle is buckled with the negative electrode busbar to compress the fiber cladding plate; and the fiber cladding plate is internally soaked with electrolyte.
6. The negative electrode protection method is characterized by comprising the following steps of: using the negative electrode protection assembly of any one of claims 1-4, in a valve-controlled sealed storage battery, covering fiber cover plates with proper dimensions on the surfaces of a negative electrode busbar in the early stage of battery production, and performing dispersed covering on the fiber cover plates at shearing seams according to the specific shape of the busbar, so that all areas which can be covered by deformation covers at the front end and the rear end of the fiber cover plates; after the fiber cladding plate is attached to the bus bar and the lugs, the bus bar is buckled side by using a plurality of buckles, so that the fiber cladding plate is fixed; and (3) performing an acid filling process on the battery, enabling electrolyte to flow through the fiber cover plate, and enabling the fiber cover plate to absorb the electrolyte.
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| CN202110364890.4A CN113471642B (en) | 2021-04-02 | 2021-04-02 | Negative electrode protection assembly, negative electrode protection battery and negative electrode protection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110364890.4A CN113471642B (en) | 2021-04-02 | 2021-04-02 | Negative electrode protection assembly, negative electrode protection battery and negative electrode protection method |
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| CN113471642A CN113471642A (en) | 2021-10-01 |
| CN113471642B true CN113471642B (en) | 2023-08-15 |
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| EP3590146A1 (en) * | 2017-03-03 | 2020-01-08 | East Penn Manufacturing Co. | Bipolar battery and plate |
| CN208157496U (en) * | 2018-04-09 | 2018-11-27 | 河南超威电源有限公司 | A kind of novel lead-acid storage battery clapboard |
| CN108970426A (en) * | 2018-07-20 | 2018-12-11 | 吕剑阳 | A kind of preparation method of reinforcement enhancement type hollow fiber film |
| CN210025287U (en) * | 2019-05-30 | 2020-02-07 | 苏州浩德自动化设备有限公司 | Clamping mechanism based on elastic buckle |
| CN110444725A (en) * | 2019-06-28 | 2019-11-12 | 浙江南都电源动力股份有限公司 | A kind of negative bus-bar protective device of valve-regulated lead-acid battery |
| CN209963135U (en) * | 2019-07-17 | 2020-01-17 | 荷贝克电源***（武汉）有限公司 | Negative bus bar anti-corrosion structure and lead-acid storage battery |
| CN212517435U (en) * | 2020-07-25 | 2021-02-09 | 启东金耀億华玻纤材料有限公司 | Ultra-fine glass fiber board with prolonged service life |
| CN212796155U (en) * | 2020-07-28 | 2021-03-26 | 启东金耀億华玻纤材料有限公司 | Multilayer composite AGM (absorptive glass mat) separator |
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