CN114464825A - Low-internal-resistance thermal battery cell stack and preparation method thereof - Google Patents
Low-internal-resistance thermal battery cell stack and preparation method thereof Download PDFInfo
- Publication number
- CN114464825A CN114464825A CN202111650414.5A CN202111650414A CN114464825A CN 114464825 A CN114464825 A CN 114464825A CN 202111650414 A CN202111650414 A CN 202111650414A CN 114464825 A CN114464825 A CN 114464825A
- Authority
- CN
- China
- Prior art keywords
- powder
- bowl
- die frame
- die
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 144
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000000178 monomer Substances 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 238000003892 spreading Methods 0.000 claims description 27
- 230000007480 spreading Effects 0.000 claims description 27
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/30—Deferred-action cells
- H01M6/36—Deferred-action cells containing electrolyte and made operational by physical means, e.g. thermal cells
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/02—Details
Abstract
The scheme discloses a low internal resistance thermal battery cell stack and a preparation method thereof in the technical field of thermal batteries, wherein conductive isolation powder, heating powder, conductive isolation powder, negative electrode powder, diaphragm powder and positive electrode powder are respectively weighed, flattened and stacked; repeating monomer stacking according to the required monomer number; and then pressing and demolding are carried out. The thermal battery technology in this scheme has reduced the clearance between each pole piece, has subdued the battery internal resistance, has promoted the thermal battery performance, and especially pulse type thermal battery is more obvious.
Description
Technical Field
The invention relates to the technical field of thermal batteries, in particular to a low internal resistance thermal battery stack and a preparation method thereof.
Background
The thermal battery is a primary reserve battery activated by melting molten salt as an electrolyte by using a self-contained heat source. The method has the advantages of short activation time, wide use environment temperature, long storage period and no maintenance, and is more and more widely applied to weapon equipment systems.
The thermal battery cell stack is generally formed by stacking electrode plates such as a heating plate, a stainless steel current collector, a composite sheet (including an anode, a diaphragm and a cathode which are integrally formed), a stainless steel current collector and the like in a certain sequence, a jack or a press and the like are required to apply certain pressure to the cell stack after stacking so as to reduce the contact resistance between the electrode plates, and then the cell stack is bundled and fixed by using a fastener so as to form the cell stack. Because the temperature of the heating sheet can reach (800-.
The current mainstream battery stacking method comprises the following steps: firstly, the composite sheet, the stainless steel collector plate, the heating sheet and the stainless steel collector plate are stacked into a small monomer, then the required small monomers are stacked together according to the number of the monomers required by the design of the thermal battery, and some thermal batteries need hundreds of small monomers, and relate to a plurality of thousands of parts. In the process, misassembly (wrong use of the pole pieces) and missing assembly (few pole pieces) are easy to occur.
The literature "terrestris, liuxiajiang. thermal battery, beijing: the defense industry press, 2005, "pp 175-176, indicates that the assembly method of the sheet-type heat cell stack is consistent with the above assembly method:
according to the method, the composite sheet and the heating sheet need to be prepared firstly, then the composite sheet, the heating sheet, the stainless steel current collecting sheet and the stainless steel current collecting sheet are stacked, the process is complicated, errors are prone to occur, the thermal battery is seriously affected after errors occur, the thermal battery cannot normally work, meanwhile, a certain gap exists between the pole pieces of the battery stack in the assembly mode, the contact internal resistance is large, the number of monomers is large, the contact internal resistance is large, and when large-current discharging is carried out, the output voltage of the thermal battery is obviously reduced.
The publication numbers of the previous applications by the applicant are: CN214378509U, patent name: a rapid spreading and demolding integrated mold in a rapid thermal battery sheet making device is researched, a low internal resistance thermal battery stack and a preparation method are obtained, and the performance and reliability of a thermal battery can be improved.
Disclosure of Invention
The present invention is intended to provide a low internal resistance thermal battery cell stack and a method of manufacturing the same to eliminate the contact internal resistance of the cell stack and simplify the assembly process of the cell stack, thereby improving the performance and reliability of the thermal battery.
A low internal resistance thermal battery cell stack in this scheme includes a plurality of battery monomers that pile up, and battery monomer is including the electrically conductive isolation powder that piles up in proper order, heating powder, electrically conductive isolation powder, anodal powder, diaphragm powder and negative pole powder.
Further, the granularity of the conductive isolation powder is larger than 100 meshes.
Further, the conductive isolation powder is at least one of graphite powder, silver powder, copper powder and iron powder.
Further, 1) flattening the conductive metal powder: after being weighed, the conductive metal powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 2) flattening the heated powder; heating powder is weighed and then added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 3) flattening the conductive metal powder: after being weighed, the conductive metal powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 4) flattening the anode powder: after the positive powder is weighed, the positive powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 5) flattening the diaphragm powder: after membrane powder is weighed, the powder is added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to gradually enter a cylindrical cavity below the die cavity; 6) flattening the negative electrode powder: after the negative electrode powder is weighed, the negative electrode powder is added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to gradually enter a cylindrical cavity below the die cavity; 7) repeating (1) - (6) according to the number of monomers required; 8) the servo motor is to the high promotion of automatic powder system that spreads out, and the transmission band will spread out powder fast and the integrative mould system of drawing of patterns is sent into the press in, and after the press descends the suppression, the servo motor control die frame descends, accomplishes the drawing of patterns, takes out the battery pile.
The working principle and the beneficial effects of the scheme are as follows: compared with the prior art, the thermal battery stack is formed by pressing all powder in the thermal battery stack at one time, so that gaps among pole pieces are reduced, internal resistance of the battery is reduced, performance of the thermal battery is improved, and particularly the pulse thermal battery is more obvious; the pole piece overlapping process is reduced, the possibility of misloading and neglected loading is reduced, the production efficiency of the thermal battery is improved, and the assembly time of each thermal battery can be reduced by (5-15) min.
Drawings
FIG. 1 is a schematic diagram of a thermal battery cell stack according to the present invention;
FIG. 2 shows the following publications: a schematic diagram of the apparatus in the CN214378509U patent;
FIG. 3 is a graph showing the operating discharge voltage of assembled thermal cells of cell stacks prepared according to examples of the present invention and comparative examples.
Detailed Description
The following is further detailed by the specific embodiments:
reference numerals in the drawings of the specification include: silver powder 1, heating powder 2, negative electrode powder 3, diaphragm 4 and positive electrode powder 5.
The embodiment is basically as shown in the attached figure 1:
a preparation method of a low internal resistance thermal battery cell stack comprises the following steps: the battery comprises a plurality of stacked battery monomers, wherein the battery monomers comprise silver powder 1 (silver powder 1 is adopted as conductive isolation powder), heating powder 2, conductive isolation powder 1, cathode powder 3, diaphragm 4 powder and anode powder 5 which are stacked in sequence; the silver powder is prepared by adopting a quick powder spreading and demoulding integrated mould shown in figure 2, (1) silver powder 1 is spread: the method comprises the following steps that silver powder 1 is weighed and then added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding and flattening system rotates in a bowl-shaped groove above a die cavity at a rotating speed of 5r/s, meanwhile, the die frame and an automatic powder spreading system above the die frame slowly rise at a rising speed of 0.10mm/s, so that the silver powder 1 enters a cylindrical cavity below the die cavity, and the automatic powder spreading system stops;
(2) flattening the heating powder 2: weighing the heated powder 2, adding the weighed heated powder into a bowl-shaped die frame through a funnel, rotating a bowl-shaped scraper of an automatic powder feeding flattening system in a bowl-shaped groove above a die cavity at a rotating speed of 3r/s, slowly lifting the die frame and an automatic powder spreading system above the die frame at a lifting speed of 0.05mm/s, so that the heated powder 2 enters a cylindrical cavity below the die cavity, and stopping the automatic powder spreading system;
(3) flattening silver powder 1: the method comprises the following steps that silver powder 1 is weighed and then added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding and flattening system rotates in a bowl-shaped groove above a die cavity at a rotating speed of 5r/s, meanwhile, the die frame and an automatic powder spreading system above the die frame slowly rise at a rising speed of 0.10mm/s, so that the silver powder 1 enters a cylindrical cavity below the die cavity, and the automatic powder spreading system stops;
(4) flattening the anode powder 5: after the anode powder 5 is weighed, adding the anode powder into a bowl-shaped die frame through a funnel, then rotating a bowl-shaped scraper of an automatic powder feeding and flattening system in a bowl-shaped groove above a die cavity at a rotating speed of 3r/s, slowly lifting the die frame and the automatic powder spreading system above the die frame at a lifting speed of 0.05mm/s, so that the anode powder 5 enters a cylindrical cavity below the die cavity, and stopping the automatic powder spreading system;
(5) flattening the diaphragm 4 powder: weighing diaphragm 4 powder, adding the powder into a bowl-shaped die frame through a funnel, rotating a bowl-shaped scraper of an automatic powder feeding flattening system in a bowl-shaped groove above a die cavity at a rotating speed of 3r/s, slowly lifting the die frame and the automatic powder spreading system above the die frame at a lifting speed of 0.05mm/s, and gradually feeding the diaphragm 4 powder into a cylindrical cavity below the die cavity;
(6) flattening the negative electrode powder 3: the negative electrode powder 3 is weighed and then added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity at the rotating speed of 2r/s, meanwhile, the die frame and the automatic powder spreading system above the die frame slowly rise at the rising speed of 0.05mm/s, and the negative electrode material gradually enters a cylindrical cavity below the die cavity;
(7) repeating the steps (1) to (6) for 33 times;
(8) then the servo motor lifts the height of the automatic powder spreading system to separate the automatic powder spreading system from the die, the transmission belt sends the rapid powder spreading and demolding integrated die system into a pressing machine, after the pressing machine descends to press, the servo motor controls a die frame to descend, demolding is completed to obtain the cell stack in the figure 1, and the cell stack is taken out;
(9) the cell stack is assembled into unit cells and discharged at an operating current with a discharge voltage as shown in "o" of fig. 3.
Comparative example: a conventional stack structure was used as a comparative example, and the preparation method was as follows:
(1) and respectively weighing the required anode powder, diaphragm powder, cathode powder and heating powder on a balance.
(2) Pouring the weighed anode powder into a mold, and leveling by using a scraper;
(3) pouring the weighed diaphragm powder into a mould, and leveling by using a scraper;
(4) and pouring the weighed cathode powder into a mold, using a scraper to strickle off and place a mold core, and sending the mold into the center of a press to press the mold into a single battery.
(5) And pouring the weighed heating powder into a mold, leveling by using a scraper, placing a mold core, conveying the mold into the center of a press, and pressing into a heating sheet.
(6) And (4) stacking a stainless steel sheet, a single battery, a stainless steel sheet and a heating sheet on the positioning tool in sequence, and repeating stacking for 33 times.
(7) The stack is pressed using a small press and secured with rigid bands or screws.
(8) And removing the pressure of the small press to obtain the cell stack.
(9) The above cell stack was assembled into a unit cell and discharged at an operating current, the discharge voltage being shown as "□" in fig. 3. And (4) conclusion: as can be seen from the discharge voltage graphs of the stacks prepared in the examples and comparative examples, the voltage curves of the examples are higher than those of the comparative examples, indicating that the internal resistance of the stacks prepared in the examples is smaller than that of the conventional stacks prepared in comparison.
Claims (4)
1. A low internal resistance thermal cell stack, comprising: the battery comprises a plurality of stacked battery monomers, wherein each battery monomer comprises conductive isolation powder, heating powder, conductive isolation powder, anode powder, diaphragm powder and cathode powder which are sequentially stacked.
2. The low internal resistance thermal battery cell stack of claim 1, wherein: the granularity of the conductive isolation powder is larger than 100 meshes.
3. The low internal resistance thermal battery cell stack of claim 2, wherein: the conductive isolation powder is at least one of graphite powder, silver powder, copper powder and iron powder.
4. The method of claim 3, wherein the step of forming a low internal resistance thermal battery cell stack comprises: 1) flattening the conductive metal powder: after being weighed, the conductive metal powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 2) flattening the heated powder; heating powder is weighed and then added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 3) flattening the conductive metal powder: after being weighed, the conductive metal powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 4) flattening the anode powder: after the positive powder is weighed, the positive powder is added into a bowl-shaped die frame through a funnel, a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to enter a cylindrical cavity below the die cavity; 5) flattening the diaphragm powder: after membrane powder is weighed, the powder is added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding flattening system rotates in a bowl-shaped groove above a die cavity, and then the die frame and an automatic powder spreading system above the die frame ascend to enable the powder to gradually enter a cylindrical cavity below the die cavity; 6) flattening the negative electrode powder: after the negative electrode powder is weighed, the negative electrode powder is added into a bowl-shaped die frame through a funnel, then a bowl-shaped scraper of an automatic powder feeding and flattening system rotates in a bowl-shaped groove above a die cavity, and the die frame and the automatic powder spreading system above the die frame ascend to enable the powder to gradually enter a cylindrical cavity below the die cavity; 7) repeating (1) - (6) according to the number of monomers required; 8) the servo motor is to the high promotion of automatic powder system that spreads out, and the transmission band will spread out powder fast and the integrative mould system of drawing of patterns is sent into the press in, and after the press descends the suppression, the servo motor control die frame descends, accomplishes the drawing of patterns, takes out the battery pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111650414.5A CN114464825A (en) | 2021-12-30 | 2021-12-30 | Low-internal-resistance thermal battery cell stack and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111650414.5A CN114464825A (en) | 2021-12-30 | 2021-12-30 | Low-internal-resistance thermal battery cell stack and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114464825A true CN114464825A (en) | 2022-05-10 |
Family
ID=81408344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111650414.5A Pending CN114464825A (en) | 2021-12-30 | 2021-12-30 | Low-internal-resistance thermal battery cell stack and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114464825A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890564A (en) * | 2019-11-29 | 2020-03-17 | 贵州梅岭电源有限公司 | Preparation method of co-heating multi-monomer for thermal battery |
| CN111430742A (en) * | 2020-05-22 | 2020-07-17 | 贵州梅岭电源有限公司 | High-conductivity heating sheet for thermal battery, preparation method and application |
-
2021
- 2021-12-30 CN CN202111650414.5A patent/CN114464825A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890564A (en) * | 2019-11-29 | 2020-03-17 | 贵州梅岭电源有限公司 | Preparation method of co-heating multi-monomer for thermal battery |
| CN111430742A (en) * | 2020-05-22 | 2020-07-17 | 贵州梅岭电源有限公司 | High-conductivity heating sheet for thermal battery, preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 岳胜利等: "《粉末冶金工业》", 热电池粉末压制成型的有限元模拟研究, vol. 20, no. 3, 30 June 2010 (2010-06-30), pages 5 - 9 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101878446B1 (en) | Battery grid with varied corrosion resistance | |
| US20110259712A1 (en) | Apparatus for stacking electrode plates | |
| CN110556568A (en) | high-voltage monomer solid-state lithium ion battery and preparation method thereof | |
| CN1303523A (en) | Non-sintered electrode and method of manufacturing same | |
| CN1297031C (en) | Drum shape alkali accumulator | |
| CN112719089B (en) | Core mold for press machine for forming fuel cell metal separation plate of hydrogen automobile | |
| CN114464825A (en) | Low-internal-resistance thermal battery cell stack and preparation method thereof | |
| CN102263274A (en) | Method for preparing split-type structured monomer battery of thermal battery | |
| CN102569913A (en) | I-shaped wrapping machine for maintenance-free lead acid battery | |
| CN109817882B (en) | Thermal battery lithium boron alloy negative electrode assembly and preparation method thereof | |
| CN106025383B (en) | Valve-regulated lead-acid storage battery and preparation method thereof | |
| CN116247387A (en) | Cylindrical battery negative electrode current collecting structure and manufacturing method thereof | |
| CN215697292U (en) | Automatic stamping production line | |
| CN209503357U (en) | A kind of fast welding tooling of square electric cell | |
| CN113649684A (en) | Ultrasonic welding equipment and process for bottom welding of cylindrical lithium ion battery cathode | |
| CN106549184B (en) | Square battery with novel current conducting structure and manufacturing method | |
| CN114824154B (en) | Bipolar battery and preparation method and application thereof | |
| CN1199299C (en) | Cadmium cathode and Ni-Cd accumulator comprising same | |
| CN1828984A (en) | Paste type plate manufacturing method and alkaline accumulator using same | |
| KR101365270B1 (en) | Apparatus for manufacturing pellet for thermal battery | |
| KR20180013788A (en) | Electrode Tab-manufacturing Apparatus with Improved Productivity of Electrode for Secondary Battery | |
| CN113794038B (en) | Method for improving liquid injection infiltration of steel shell full-lug cylindrical battery cell | |
| CN103346329A (en) | Method for manufacturing positive grid of lead-acid storage battery | |
| CN217280918U (en) | Square winding type battery | |
| CN117477053A (en) | Manufacturing method and production line of semi-solid lithium battery based on sheet-level battery unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |