CN112599727A - Positive plate film-coated polar plate lamination curing process - Google Patents
Positive plate film-coated polar plate lamination curing process Download PDFInfo
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- CN112599727A CN112599727A CN202011298158.3A CN202011298158A CN112599727A CN 112599727 A CN112599727 A CN 112599727A CN 202011298158 A CN202011298158 A CN 202011298158A CN 112599727 A CN112599727 A CN 112599727A
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- curing
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- circulating fan
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/22—Forming of electrodes
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/22—Forming of electrodes
- H01M4/23—Drying or preserving electrodes after forming
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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
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a positive plate film-coated polar plate lamination curing process, which relates to the technical field of storage battery manufacturing, and achieves the polar plate curing effect by regulating and controlling the aspects of temperature, humidity, circulating air speed, atomized water, steam flow, regulation and control modes and the like in the curing process; according to the positive plate film-coated pole plate curing process, the highest temperature of a curing stage is 62 ℃ so as to avoid passivation of a pole plate due to overhigh temperature, meanwhile, spray humidification in steps Stp1 to Stp6 is adjusted to be in a normally open mode, the humidity inside a curing chamber is always in a saturated humidity state so as to reduce the loss of the moisture of the pole plate, spray humidification is turned off in steps Stp7 to Stp15, only compressed air is used for supplementing oxygen, oxygen required by free lead oxidation in pole plate lead paste is guaranteed, a better oxidation effect is achieved, Stp16 to Stp21 are in an abrupt supply mode, at the moment, the pole plate lead paste curing and the free lead oxidation are finished, and the positive plate film-coated pole plate curing process can be quickly dried within a short time, so that the drying effect of the.
Description
Technical Field
The invention relates to the technical field of storage battery manufacturing processes, in particular to a positive plate film-coated polar plate lamination curing process.
Background
The plate solidification is that under the condition of certain temperature and humidity, the residual free lead in the lead plaster is further oxidized into lead oxide and basic lead sulfate within the time specified by the process, in the process, the lead plaster is recrystallized to form a compact reticular structure with gaps, the traditional solidification mode is that the plates are uniformly dispersed, so the temperature and the humidity are easy to control, and along with the development of the technology, after the on-line film covering and cutting process of the plates is realized, only the plates are stacked and then solidified, but the stacking mode can cause the poor consistency of the plate solidification, thereby causing the defects of low utilization rate of positive active substances, poor charging receiving capability and short deep discharge cycle life, thus the development and the application of the lead-acid storage battery are seriously limited, and the cycle life of the positive plate depends on the raw plate solidification condition to a great extent, it is particularly important in the selection of curing conditions of temperature, humidity, time and control.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects brought forward by the background technology, the invention provides a positive plate film-coated polar plate lamination curing process, which solves the problems brought forward by the background technology.
(II) technical scheme
2. In order to achieve the purpose, the invention provides the following technical scheme: a positive plate film-coated polar plate lamination curing process comprises the following steps:
stp1, curing stage: curing for 1h at the temperature of 45 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp2, curing stage: curing for 1.5h under the conditions that the temperature is 55 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp3, three stages of curing: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp4, four stages of curing: curing for 15h under the conditions that the temperature is 62 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp5, and curing five stages: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 40%;
stp6, six stages of curing: curing for 5 hours at the temperature of 60 ℃ and the humidity of 100 percent RH, wherein the rotating speed of a circulating fan is 40 percent;
stp7, seven-stage curing: curing for 1h at 55 ℃ and 98% RH humidity, and rotating speed of a circulating fan is 50%;
stp8, eight stages of curing: curing for 1h at 55 ℃ and 95% RH humidity, and rotating speed of a circulating fan is 50%;
stp9, nine stages of curing: curing for 2.5h under the conditions that the temperature is 55 ℃ and the humidity is 93% RH, and the rotating speed of a circulating fan is 50%;
stp10, Ten stages of curing: curing for 0.5h at 52 ℃ and 90% RH, and rotating speed of a circulating fan is 60%;
stp11, eleven stages of curing: curing for 3h under the conditions that the temperature is 52 ℃ and the humidity is 90% RH, and the rotating speed of a circulating fan is 60%;
stp12, twelve stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 85% RH, and the rotating speed of a circulating fan is 60%;
stp13, thirteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 85% RH, and the rotating speed of a circulating fan is 60%;
stp14, fourteen stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 80% RH, and the rotating speed of a circulating fan is 70%;
stp15, fifteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 80% RH, and the rotating speed of a circulating fan is 70%;
stp16, drying stage: curing for 1h at the temperature of 60 ℃ and the humidity of 10% RH, wherein the rotating speed of a circulating fan is 90%;
stp17, drying stage: curing for 1h at 65 ℃ and 0% RH humidity, and rotating the circulating fan at 90%;
stp18, drying three stages: curing for 2h under the conditions that the temperature is 70 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 90%;
stp19, and drying: curing for 1h at the temperature of 75 ℃ and the humidity of 0% RH, wherein the rotating speed of a circulating fan is 90%;
stp20, and five drying stages: curing for 15h under the conditions that the temperature is 75 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%;
stp21, and six drying stages: curing for 2h under the conditions that the temperature is 40 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%.
Preferably, the steps Stp1 to Stp6 adopt spray humidification and are humidity-controlled, the steps Stp7 to Stp15 close spray humidification and only open compressed air for oxygen supplement, and the steps Stp16 to Stp21 close spray shut and oxygen supplement.
Preferably, the Stp1 to Stp15, the temperature and humidity are in gradual mode when each stage jumps, that is, when the previous stage jumps to the next stage, the temperature and humidity are gradually controlled and are controlled to the set values of the stage when the process time runs to the last moment, and the Stp16 to Stp21 are in abrupt mode, that is, when the previous stage jumps to the next stage, the temperature and humidity are immediately controlled to the set values of the stage.
Preferably, the steps Stp1 to Stp6 adopt that steam is directly acted in the main chamber of the curing chamber for steam heating, the steps Stp7 to Stp15 adopt that steam heating and steam are acted on the radiating fins for alternative use, the steam heating mode is the same as the steps Stp1 to Stp6 that steam is directly acted in the main chamber of the curing chamber for steam heating, the steam is acted on the radiating fins and is brought into the main chamber for heating through high-temperature circulating air after heat exchange, and the alternative use of the two modes is controlled by the temperature and the humidity; the Stp 16-Stp 21 adopt steam to act on the heat dissipation fins of the curing chamber, and the steam is brought into the main chamber for heating through high-temperature circulating air after heat exchange.
Preferably, the positive plate is laminated to perform steps Stp1 to Stp 21.
(III) advantageous effects
Compared with the prior art, the invention provides a positive plate film-coated polar plate lamination curing process, which has the following beneficial effects:
the highest temperature of the curing stage of the positive plate film-coated polar plate lamination curing process is 60 ℃ so as to avoid passivation of the polar plate due to overhigh temperature, and meanwhile, the spray humidification adjustment of the steps from Stp1 to Stp6 is in a normally open mode, so that the humidity inside a curing chamber is always in a saturated humidity state, and the loss of the water of the polar plate is reduced;
the Stp 1-Stp 15 of the positive plate film-coated polar plate lamination curing process is in a gradual mode, the temperature and the humidity in the curing process are controlled in the gradual changing mode, the temperature and the humidity can be prevented from being changed in a cliff mode after the upper and lower stages jump, and therefore the polar plate lead plaster curing effect is guaranteed, the Stp 16-St 21 are in a sudden mode, at the moment, the polar plate lead plaster curing and free lead oxidation are finished, and the time can be shortened for quick drying, so that the polar plate drying effect is guaranteed;
according to the curing process of the positive plate film-coated polar plate lamination, the Stp 1-Stp 6 directly act steam in a curing chamber main chamber to perform steam heating, and the Stp 7-Stp 15 alternately use steam humidification and steam action on the radiating fins, so that the temperature and humidity in the process are ensured according to the curing requirement of polar plate lead plaster, and the Stp 16-Stp 21 act on the radiating fins of the curing chamber through steam, so that the increase of the humidity is avoided in the drying stage;
the Stp 7-Stp 15 of the positive plate laminating and solidifying pole plate lamination closing spray humidification and only opening compressed air for supplementing oxygen, thereby ensuring oxygen required by free lead oxidation in pole plate lead plaster and achieving better oxidation effect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A positive plate film-coated polar plate lamination curing process comprises the following steps:
stp1, curing stage: curing for 1h at the temperature of 45 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp2, curing stage: curing for 1.5h under the conditions that the temperature is 55 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp3, three stages of curing: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp4, four stages of curing: curing for 15h under the conditions that the temperature is 62 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp5, and curing five stages: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 40%;
stp6, six stages of curing: curing for 5 hours at the temperature of 60 ℃ and the humidity of 100 percent RH, wherein the rotating speed of a circulating fan is 40 percent;
stp7, seven-stage curing: curing for 1h at 55 ℃ and 98% RH humidity, and rotating speed of a circulating fan is 50%;
stp8, eight stages of curing: curing for 1h at 55 ℃ and 95% RH humidity, and rotating speed of a circulating fan is 50%;
stp9, nine stages of curing: curing for 2.5h under the conditions that the temperature is 55 ℃ and the humidity is 93% RH, and the rotating speed of a circulating fan is 50%;
stp10, Ten stages of curing: curing for 0.5h at 52 ℃ and 90% RH, and rotating speed of a circulating fan is 60%;
stp11, eleven stages of curing: curing for 3h under the conditions that the temperature is 52 ℃ and the humidity is 90% RH, and the rotating speed of a circulating fan is 60%;
stp12, twelve stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 85% RH, and the rotating speed of a circulating fan is 60%;
stp13, thirteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 85% RH, and the rotating speed of a circulating fan is 60%;
stp14, fourteen stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 80% RH, and the rotating speed of a circulating fan is 70%;
stp15, fifteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 80% RH, and the rotating speed of a circulating fan is 70%;
stp16, drying stage: curing for 1h at the temperature of 60 ℃ and the humidity of 10% RH, wherein the rotating speed of a circulating fan is 90%;
stp17, drying stage: curing for 1h at 65 ℃ and 0% RH humidity, and rotating the circulating fan at 90%;
stp18, drying three stages: curing for 2h under the conditions that the temperature is 70 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 90%;
stp19, and drying: curing for 1h at the temperature of 75 ℃ and the humidity of 0% RH, wherein the rotating speed of a circulating fan is 90%;
stp20, and five drying stages: curing for 15h under the conditions that the temperature is 75 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%;
stp21, and six drying stages: curing for 2h under the conditions that the temperature is 40 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%.
Wherein, the steps Stp1 to Stp6 adopt spray humidification and are controlled by humidity, the steps Stp7 to Stp15 close the spray humidification and only open compressed air for supplementing oxygen, and the steps Stp16 to Stp21 close the spray and close the oxygen supplementation.
In the Stp1 to Stp15, the temperature and humidity are in a gradual mode when each stage jumps, that is, when the previous stage jumps to the next stage, the temperature and humidity are gradually controlled and are controlled to the set values of the stage when the process time runs to the last moment, and the Stp16 to Stp21 are in an abrupt mode, that is, when the previous stage jumps to the next stage, the temperature and humidity are immediately controlled to the set values of the stage.
The steps Stp1 to Stp6 adopt that steam directly acts on the main chamber of the curing chamber to perform steam heating, the steps Stp7 to Stp15 adopt that steam heating and steam act on the radiating fins to be used alternately, the steam heating mode and the steps Stp1 to Stp6 adopt that the steam directly acts on the main chamber of the curing chamber to perform steam heating, the steam acts on the radiating fins and is brought into the main chamber to perform heating through high-temperature circulating air after heat exchange, and the alternating use of the two modes is dual-controlled by temperature and humidity; the Stp 16-Stp 21 adopt steam to act on the heat sink of the curing chamber, and the steam is brought into the main chamber for heating through high-temperature circulating air after heat exchange.
Wherein, the positive plate adopts a lamination mode to carry out steps Stp1 to Stp 21.
Through nine squares grid arrangement, take 27 points in the curing chamber to insist, sample this example and current process contrast, current process is as the contrast group, detects as follows:
as can be seen from the above, the lead paste in the process of the experimental group of the invention has extremely poor water content, extremely poor free lead, average free lead content and eight-time drop strength, which are all lower than those of the comparative group, so that the performance of the experimental group is higher.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A positive plate film-coated polar plate lamination curing process is characterized by comprising the following steps:
stp1, curing stage: curing for 1h at the temperature of 45 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp2, curing stage: curing for 1.5h under the conditions that the temperature is 55 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp3, three stages of curing: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 30%;
stp4, four stages of curing: curing for 15h under the conditions that the temperature is 62 ℃ and the humidity is 100% RH, and the rotating speed of a circulating fan is 30%;
stp5, and curing five stages: curing for 1h at the temperature of 62 ℃ and the humidity of 100% RH, wherein the rotating speed of a circulating fan is 40%;
stp6, six stages of curing: curing for 5 hours at the temperature of 60 ℃ and the humidity of 100 percent RH, wherein the rotating speed of a circulating fan is 40 percent;
stp7, seven-stage curing: curing for 1h at 55 ℃ and 98% RH humidity, and rotating speed of a circulating fan is 50%;
stp8, eight stages of curing: curing for 1h at 55 ℃ and 95% RH humidity, and rotating speed of a circulating fan is 50%;
stp9, nine stages of curing: curing for 2.5h under the conditions that the temperature is 55 ℃ and the humidity is 93% RH, and the rotating speed of a circulating fan is 50%;
stp10, Ten stages of curing: curing for 0.5h at 52 ℃ and 90% RH, and rotating speed of a circulating fan is 60%;
stp11, eleven stages of curing: curing for 3h under the conditions that the temperature is 52 ℃ and the humidity is 90% RH, and the rotating speed of a circulating fan is 60%;
stp12, twelve stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 85% RH, and the rotating speed of a circulating fan is 60%;
stp13, thirteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 85% RH, and the rotating speed of a circulating fan is 60%;
stp14, fourteen stages of curing: curing for 0.5h at the temperature of 52 ℃ and the humidity of 80% RH, and the rotating speed of a circulating fan is 70%;
stp15, fifteen stages of curing: curing for 3.5h under the conditions that the temperature is 52 ℃ and the humidity is 80% RH, and the rotating speed of a circulating fan is 70%;
stp16, drying stage: curing for 1h at the temperature of 60 ℃ and the humidity of 10% RH, wherein the rotating speed of a circulating fan is 90%;
stp17, drying stage: curing for 1h at 65 ℃ and 0% RH humidity, and rotating the circulating fan at 90%;
stp18, drying three stages: curing for 2h under the conditions that the temperature is 70 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 90%;
stp19, and drying: curing for 1h at the temperature of 75 ℃ and the humidity of 0% RH, wherein the rotating speed of a circulating fan is 90%;
stp20, and five drying stages: curing for 15h under the conditions that the temperature is 75 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%;
stp21, and six drying stages: curing for 2h under the conditions that the temperature is 40 ℃ and the humidity is 0% RH, and the rotating speed of a circulating fan is 100%.
2. The curing process of claim 1, wherein the steps Stp1 to Stp6 are spray humidified and humidity controlled, the steps Stp7 to Stp15 are closed to spray humidification and only compressed air is opened for oxygen supplement, and the steps Stp16 to Stp21 are closed to spray closed to supplement oxygen.
3. The curing process of the positive laminated plate lamination stack as claimed in claim 1, wherein the Stp1 to Stp15 are in a gradual mode of temperature and humidity during each step, i.e. when the previous step is shifted to the next step, the temperature and humidity are gradually controlled and controlled to the set values of the step only when the process time is running to the last moment, and the Stp16 to Stp21 are in an abrupt mode of temperature and humidity being immediately controlled to the set values of the step when the previous step is shifted to the next step.
4. The curing process of positive plate film-coated polar plate lamination according to claim 1 or 2, wherein the steps Stp1 to Stp6 adopt that steam is directly acted in the curing chamber main chamber for steam heating, the steps Stp7 to Stp15 adopt that steam heating and steam are acted on the radiating fins for alternate use, the steam heating mode is the same as the steps Stp1 to Stp6 that steam is directly acted in the curing chamber main chamber for steam heating, the steam acted on the radiating fins is brought into the main chamber for heating through high-temperature circulating air after heat exchange, and the alternate use of the two is controlled by temperature and humidity; the Stp 16-Stp 21 adopt steam to act on the heat dissipation fins of the curing chamber, and the steam is brought into the main chamber for heating through high-temperature circulating air after heat exchange.
5. The curing process of positive plate film-covered polar plate lamination according to claim 1, wherein the positive plate is subjected to steps Stp1 to Stp21 in a lamination mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298158.3A CN112599727A (en) | 2020-11-19 | 2020-11-19 | Positive plate film-coated polar plate lamination curing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298158.3A CN112599727A (en) | 2020-11-19 | 2020-11-19 | Positive plate film-coated polar plate lamination curing process |
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| CN112599727A true CN112599727A (en) | 2021-04-02 |
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| CN202011298158.3A Pending CN112599727A (en) | 2020-11-19 | 2020-11-19 | Positive plate film-coated polar plate lamination curing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114976039A (en) * | 2022-04-28 | 2022-08-30 | 浙江天能汽车电池有限公司 | Curing process of positive plate of storage battery |
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| CN102610800A (en) * | 2012-03-30 | 2012-07-25 | 山东瑞宇蓄电池有限公司 | Method for solidifying lead-acid battery plate |
| CN108232123A (en) * | 2017-12-26 | 2018-06-29 | 浙江天能动力能源有限公司 | A kind of lead-acid storage battery positive electrode plate for electric curing process |
| CN109065846A (en) * | 2018-07-28 | 2018-12-21 | 河南超威电源有限公司 | Positive electrode plate of lead-acid battery curing process |
| CN109742329A (en) * | 2018-11-28 | 2019-05-10 | 浙江天能动力能源有限公司 | A kind of accumulator anode board curing process |
| CN111477879A (en) * | 2020-04-15 | 2020-07-31 | 天能电池(芜湖)有限公司 | Curing process for improving curing uniformity |
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2020
- 2020-11-19 CN CN202011298158.3A patent/CN112599727A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610800A (en) * | 2012-03-30 | 2012-07-25 | 山东瑞宇蓄电池有限公司 | Method for solidifying lead-acid battery plate |
| CN108232123A (en) * | 2017-12-26 | 2018-06-29 | 浙江天能动力能源有限公司 | A kind of lead-acid storage battery positive electrode plate for electric curing process |
| CN109065846A (en) * | 2018-07-28 | 2018-12-21 | 河南超威电源有限公司 | Positive electrode plate of lead-acid battery curing process |
| CN109742329A (en) * | 2018-11-28 | 2019-05-10 | 浙江天能动力能源有限公司 | A kind of accumulator anode board curing process |
| CN111477879A (en) * | 2020-04-15 | 2020-07-31 | 天能电池(芜湖)有限公司 | Curing process for improving curing uniformity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114976039A (en) * | 2022-04-28 | 2022-08-30 | 浙江天能汽车电池有限公司 | Curing process of positive plate of storage battery |
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