CN114883753B - Electrode plate with self-checking function and self-checking method for electric core arrangement - Google Patents
Electrode plate with self-checking function and self-checking method for electric core arrangement Download PDFInfo
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- CN114883753B CN114883753B CN202210394330.8A CN202210394330A CN114883753B CN 114883753 B CN114883753 B CN 114883753B CN 202210394330 A CN202210394330 A CN 202210394330A CN 114883753 B CN114883753 B CN 114883753B
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- electrode
- battery cells
- self
- electrode plate
- metal contact
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- 238000000034 method Methods 0.000 title abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 42
- 238000003466 welding Methods 0.000 claims abstract description 42
- 238000010892 electric spark Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005856 abnormality Effects 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract description 2
- 230000004630 mental health Effects 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 238000004080 punching Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 230000001739 rebound effect Effects 0.000 description 1
Classifications
-
- 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
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- 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
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to the technical field of battery assembly, and particularly discloses an electrode plate with a self-checking function and a self-checking method for electric core arrangement; the electrode slice comprises a metal slice body, wherein a plurality of elastic and upwardly bent metal contact pins are connected to the same surface of the metal slice body in a rectangular array shape; the self-checking method comprises the following steps: 1. selecting electrode plates matched with the arranged battery cells, and aligning and covering the electrode plates on the battery cells; 2. applying a pressing force to the electrode plate to enable the metal contact pins to be in contact with the electrode heads of the corresponding battery cells, and observing the situation between the electrode plate and the electrode heads of the battery cells; 3. judging whether an abnormality occurs or not according to whether electric sparks are generated or not; the electrode plate and the self-checking method effectively avoid the condition that the arranged battery cells cannot be self-checked to cause burning or explosion of the battery cells in the spot welding process of the existing electrode plate, and have good guarantee effects on physical and mental health of operators and use of spot welding machines.
Description
Technical Field
The utility model relates to the technical field of battery assembly, and particularly discloses an electrode plate with a self-checking function and a self-checking method for electric core arrangement.
Background
In the assembly process of the lithium battery, single electric cores are required to be arranged well, and then the plurality of arranged electric cores are connected in series and parallel by using the electrode plates. At present, the common electrode plate is a nickel plate with a smooth surface, and is arranged at the positive and negative ends of the battery cell when connected in series and parallel, and then the positive and negative electrodes of the battery cell are connected through spot welding.
For example, the utility model patent with application number 201821554638X discloses a nickel sheet for a battery, which comprises a nickel sheet body, wherein a plurality of first split-flow slots are arranged on the nickel sheet body at intervals, spot welding areas are arranged on two sides of the first split-flow slots, and the first split-flow slots are in an S shape. The nickel plate of the battery disclosed by the utility model is an electrode plate with a flat surface, and the current can be released during spot welding by a shunt slot hole formed in the surface of the electrode plate, so that explosion in the spot welding process is prevented. However, the electrode sheet of the type cannot carry out self-detection on the arrangement of the electric cores in the process of carrying out serial-parallel connection on the electric cores, once the positive electrode and the negative electrode of one of the electric cores are misplaced, the electric cores are burnt out and even exploded easily due to rapid increase of current caused by short circuit in the spot welding process, so that great harm is brought to physical and psychological health of operators and spot welding machines.
The reason is mainly that the arrangement of the battery cells is manually operated at present, and the situation that the positive and negative poles of the battery cells are reversely inserted easily occurs due to long-time fatigue operation of workers in the manual arrangement process; the two-aspect battery cell cannot ensure that the well-arranged battery cell electrode heads are a flat surface when the battery cells are arranged, and the electrode heads of part of the battery cells are upwards raised and the electrode heads of part of the battery cells are downwards recessed. Therefore, when the existing electrode plates with flat surfaces are adopted to carry out series-parallel connection on the battery cells, the arranged battery cell electrode heads cannot be fully and effectively contacted with the electrode plates, the series-parallel connection on all the battery cells can be completed only after the electrode plates are pressed down by a head of a spot welder and the welding of the electrode heads is completed, and once the positive and negative poles of a certain battery cell are reversed, an operator cannot find out in time due to the shielding effect of the electrode plates, even if the operator finds out that the electrode plates cannot be detached quickly in time, the condition that the battery cells burn out or explode easily occurs in the spot welding process of the electrode plates or after the spot welding is completed is avoided. Aiming at the problems in the prior process of carrying out series-parallel connection on the arranged battery cells, the application designs an electrode plate capable of carrying out self-detection on the positive and negative poles of the arranged battery cells before spot welding and a method for carrying out self-detection on the arrangement of the battery cells by using the electrode plate.
Disclosure of Invention
The utility model aims at overcoming the defect that the existing electrode plate cannot carry out self-inspection on the arrangement of the battery cells through the electrode plate before spot welding due to the fact that the existing electrode plate is integrally flat, and accordingly, the electrode plate capable of carrying out self-inspection on the positive and negative electrodes of the arranged battery cells before spot welding and a method for carrying out self-inspection on the arrangement of the battery cells by using the electrode plate are designed.
The utility model is realized by the following technical scheme:
the utility model provides an electrode slice with self-checking function, includes the metal lamellar body, be rectangular array form on the same surface of metal lamellar body and be connected with a plurality of elasticity, and upwards buckle the metal contact pin, the tip of metal contact pin is the tip setting.
As a specific arrangement of the scheme, the metal sheet body is one of nickel-plated steel belt or copper-aluminum alloy.
As a first design of the above-mentioned aspect, the metal contact pin is obtained by stamping a metal sheet body from a stamping die, and a strip-shaped hole is stamped in the metal sheet body located at the metal contact pin.
As a second embodiment of the above-described solution, the metal contact pins are connected to the metal sheet by welding.
As a specific arrangement of the scheme, the thickness of the metal sheet body is set in the range of 0.1mm-1 mm.
As a further arrangement of the scheme, the metal sheet body is also provided with a through hole.
According to the electrode slice designed by the utility model, before the arranged battery cells are subjected to spot welding series-parallel connection, the electrode slice is covered on the electrode heads of the battery cells, as the metal contact pins are bent upwards and have certain elasticity, when certain pressure is applied to the electrode slice, even if the arranged battery cell electrode heads are not positioned on the same flat surface, after the pressure is applied, all the metal contact pins can be contacted with the electrode heads of the corresponding battery cells, once the battery cells with wrong positive and negative poles exist in the battery cells, as the metal contact pins are thinner, the resistance of the tip of each contact pin is larger, electric spark can be generated at the moment of contact, and at the moment, an operator can find the corresponding abnormal battery cells by standing horses and correct the abnormal battery cells.
Meanwhile, the utility model also discloses a self-checking method for arranging the battery cells by using the electrode plate, which comprises the following steps:
s1: selecting electrode plates matched with the arranged battery cells, and covering the battery cells with the electrode plates to ensure that the metal contact pins are aligned with electrode heads of the corresponding battery cells;
s2: applying a pressing force to the electrode plates so that each metal contact pin is contacted with the electrode head of the corresponding battery cell, and observing the situation between the electrode plates and the electrode heads of the battery cells;
s4: when a certain cell arrangement is abnormal, an electrode tip on the cell can generate electric spark at the moment of contacting with a metal contact pin, an operator judges that the cell arrangement is abnormal, and timely takes down the electrode plate to correct the abnormally arranged cell, and spot welding is performed on the electrode plate and the electrode tip of the cell after the correction is completed;
s5: and if all the electric cores are normally arranged, directly performing spot welding on the electrode plate and the electrode heads of the electric cores.
The beneficial effects are that:
1) The electrode slice designed by the utility model has simple structure and convenient preparation, but can carry out abnormal self-detection on the arranged battery cells before spot welding, thereby greatly avoiding the condition that the battery cells are burnt out or exploded in the spot welding process due to the fact that the arranged battery cells cannot be self-detected by the existing electrode slice, and having better guarantee effect on physical and mental health of operators and use of a spot welder.
2) The utility model discloses a self-checking method for whether the arrangement of the battery cells is abnormal or not by relying on the electrode plate with special design, an operator only needs to contact the contact pin on the electrode plate with the electrode head in the self-checking process, then whether the arrangement of the battery cells is abnormal or not can be quickly judged by observing whether electric sparks occur between the contact pin and the electrode head, and the battery cells with abnormal arrangement can be quickly corrected by finding out the abnormal arrangement. The self-checking method disclosed by the utility model is novel in thought, simple to operate and free from depending on related electronic detection instruments; meanwhile, when the abnormally arranged battery cells are found, correction can be performed in time, the problem existing in the process of carrying out series-parallel connection on the arranged battery cells is effectively solved, and the practical use effect is very excellent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of an electrode sheet in embodiment 1;
fig. 2 is a schematic perspective view of the electrode sheet in embodiment 2.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail with reference to fig. 1 to 2, and in conjunction with examples.
Example 1
Embodiment 1 discloses a 2×4 electrode sheet for a battery pack, referring to fig. 1, the electrode sheet includes a strip-shaped sheet body 1 made of nickel-plated steel strip, eight punching contact pins 101 bent upward are formed on the strip-shaped sheet body 1 by die punching, the eight punching contact pins 101 are arranged on the strip-shaped sheet body 1 in a two-row four-column rectangular array, and when the arranged battery cells are connected in series and parallel, the punching contact pins 101 can make the tips of the punching contact pins 101 contact with the electrode heads on each corresponding battery cell after a certain pressure is applied due to upward bending.
Since the stamping stylus 101 in embodiment 1 is formed by stamping through a die, a strip-shaped hole 102 matching with the stamping stylus 101 is formed at the position of each stamping stylus 101, and the stamping stylus 101 can be pressed into the corresponding strip-shaped hole 102 under the action of external force due to the self-elastic action, and then spot-welded and connected to the position of the stamping stylus 101.
Before performing series-parallel spot welding on the arranged battery cells, the electrode plates are covered on the arranged battery cells, and then the electrode plates are pressed downwards with force, so that the tip of each stamping contact pin 101 is contacted with the electrode tip on the corresponding battery cell, and at the moment, the whole arranged battery cells are connected in series or in parallel through the electrode plates. When the positive electrode and the negative electrode of a certain battery cell are reversed, the internal resistance of the battery cell is small, the voltage difference is concentrated at the tip part of the corresponding stamping contact pin 101, electric sparks are generated, and the related operators can stand Ma Chajiao with the battery cells which are arranged abnormally, so that the operators can take down the electrode plates in time, and correct the abnormally arranged battery cells, so that the self-checking process of the arrangement of the battery cells is completed; when all the electric cores are arranged without abnormality, no electric spark is generated by pressing down the stamping contact pins 101 on the electrode plates, and then the electrode plates and the electrode heads of the electric cores can be welded one by one directly through a spot welder.
In addition, the thinner the punching stylus tip is set in embodiment 1, the larger the resistance of the punching stylus tip is, and the more obvious the acousto-optic effect such as electric spark is generated when the punching stylus 101 is in contact with the electrode tip, and the more easily the punching stylus tip is perceived by an operator. Therefore, in the specific design process, the thickness of the strip-shaped sheet body 1 can be set between 0.1mm and 1mm as much as possible, the width of the stamping contact pin 101 formed by stamping is controlled to be set at 5mm as little as possible, the stamping contact pin is ensured to be small enough, and the electric spark generated in the self-checking process of the battery cell is more obvious, so that an operator can perceive the electric spark immediately.
Finally, in order to facilitate the operator to observe the condition of the battery cell below the electrode plate and save raw materials, a plurality of through holes 103 are also formed in the position of the non-punching contact pins 101 of the strip-shaped sheet body 1.
Example 2
Embodiment 2 discloses a 2×3 electrode plate for a battery pack, referring to fig. 2, the electrode plate includes an elongated sheet body 2 made of a copper-aluminum alloy material, six upwardly bent resilient welding contact pins 201 are welded on the upper surface of the elongated sheet body 2, the welding contact pins 201 are also made of the copper-aluminum alloy material, and the six welding contact pins 201 are arranged on the elongated sheet body 2 in a two-row three-column rectangular array. When the arranged battery cells are connected in series and parallel, after a certain pressure is applied to the electrode plates, the welding contact pins 201 are bent upwards, so that the tips of the welding contact pins 201 can be contacted with the electrode heads on each corresponding battery cell.
Before spot welding is performed on the arranged battery cells, the electrode sheet designed in this embodiment 2 covers the whole electrode sheet on the arranged battery cells, the tip of each welding contact pin 201 is aligned with the corresponding battery cell electrode tip, then a certain pressing force is applied to the electrode sheet, and the tip of each welding contact pin 201 contacts with the electrode tip on the corresponding battery cell due to a certain rebound effect of the welding contact pin 201, so that the whole arranged battery cells are connected in series or in parallel in advance through the electrode sheet. Similarly, when the positive electrode and the negative electrode of a certain battery cell are reversed, the internal resistance of the battery cell is small, the voltage difference is concentrated at the tip of the corresponding welding contact pin 201, electric sparks are generated, the battery cell with abnormal arrangement can be erected Ma Chajiao by related operators, and the electrode plate is taken down in time to correct the abnormal battery cell, so that the self-checking process of the arrangement of the battery cell is completed; when the arrangement of all the electric cores is not abnormal, no electric spark is generated by pressing the electrode plate, and then the electrode plate and the electrode heads of the electric cores are welded next to each other through a spot welder.
In addition, in the welding probe 201 of this embodiment 2, the thinner the welding probe 201 is, and the more remarkable the acousto-optic effect such as electric spark is generated at the moment of contact between the welding probe 201 and the electrode tip, and the more easily the operator can feel. Finally, in order to facilitate the operator to observe the situation of the battery cell below the electrode plate and save raw materials, a plurality of through holes 202 may be formed at the position of the non-welding contact pins 201 of the elongated sheet body 1.
Example 3
Embodiment 3 discloses a method for performing self-inspection on the arranged battery cells by using the electrode sheet in embodiment 1 or embodiment 2, which comprises the following steps:
s1: selecting an electrode plate matched with the arranged battery cells, covering the electrode plate on the arranged battery cells, and ensuring that each contact pin is aligned with the electrode head of the corresponding battery cell;
s2: pressing a certain pressing force on the electrode plate to enable each contact pin to be in contact with the electrode head of the corresponding battery cell, and observing the situation between the electrode plate and the electrode head of the battery cell;
s3: if a certain electric core arrangement is abnormal, the electrode tip on the electric core can concentrate on the tip of the corresponding contact pin due to short circuit at the moment of contact with the contact pin, and an acousto-optic effect such as electric spark is generated, at the moment, an operator can immediately judge that the electric core arrangement is abnormal, timely take down the electrode plate to correct the electric core arranged abnormally, and spot welding can be carried out on the electrode plate and the electrode tip of the electric core after correction is completed, so that a series-parallel connection process of the electric core is completed;
s4: and if all the electric cores are normally arranged, the electrode plates and the electrode heads of the electric cores can be directly subjected to spot welding by a spot welder, so that the series-parallel connection process of the electric cores is completed.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (5)
1. The electrode slice with the self-checking function comprises a metal slice body, and is characterized in that a plurality of elastic upward-bending metal contact pins are connected to the same surface of the metal slice body in a rectangular array shape, and the end parts of the metal contact pins are arranged in a tip mode;
the metal sheet body is one of nickel-plated steel strip or copper-aluminum alloy;
the thickness of the metal sheet body is set within the range of 0.1mm-1 mm;
the self-checking function is realized by the following steps:
s1: selecting electrode plates matched with the arranged battery cells, and covering the battery cells with the electrode plates to ensure that the metal contact pins are aligned with electrode heads of the corresponding battery cells;
s2: applying a pressing force to the electrode plates so that each metal contact pin is contacted with the electrode head of the corresponding battery cell, and observing the situation between the electrode plates and the electrode heads of the battery cells;
s3: when a certain cell arrangement is abnormal, an electrode tip on the cell can generate electric spark at the moment of contacting with a metal contact pin, an operator judges that the cell arrangement is abnormal, and timely takes down the electrode plate to correct the abnormally arranged cell, and spot welding is performed on the electrode plate and the electrode tip of the cell after the correction is completed;
s4: and if all the electric cores are normally arranged, directly performing spot welding on the electrode plate and the electrode heads of the electric cores.
2. The electrode sheet with self-checking function according to claim 1, wherein the metal contact pins are obtained by stamping from a metal sheet body by a stamping die, and strip-shaped holes are stamped in the metal sheet body at the metal contact pins.
3. The electrode sheet with self-test function according to claim 1, wherein the metal contact pins are connected to the metal sheet body by welding.
4. The electrode sheet with self-checking function according to claim 1, wherein the metal sheet body is further provided with a through hole.
5. A self-test method for arranging cells using the electrode sheet according to any one of claims 1 to 4, comprising the steps of:
s1: selecting electrode plates matched with the arranged battery cells, and covering the battery cells with the electrode plates to ensure that the metal contact pins are aligned with electrode heads of the corresponding battery cells;
s2: applying a pressing force to the electrode plates so that each metal contact pin is contacted with the electrode head of the corresponding battery cell, and observing the situation between the electrode plates and the electrode heads of the battery cells;
s4: when a certain cell arrangement is abnormal, an electrode tip on the cell can generate electric spark at the moment of contacting with a metal contact pin, an operator judges that the cell arrangement is abnormal, and timely takes down the electrode plate to correct the abnormally arranged cell, and spot welding is performed on the electrode plate and the electrode tip of the cell after the correction is completed;
s5: and if all the electric cores are normally arranged, directly performing spot welding on the electrode plate and the electrode heads of the electric cores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210394330.8A CN114883753B (en) | 2022-04-15 | 2022-04-15 | Electrode plate with self-checking function and self-checking method for electric core arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210394330.8A CN114883753B (en) | 2022-04-15 | 2022-04-15 | Electrode plate with self-checking function and self-checking method for electric core arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114883753A CN114883753A (en) | 2022-08-09 |
| CN114883753B true CN114883753B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210394330.8A Active CN114883753B (en) | 2022-04-15 | 2022-04-15 | Electrode plate with self-checking function and self-checking method for electric core arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN114883753B (en) |
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| JPH1186821A (en) * | 1997-09-09 | 1999-03-30 | Matsushita Electric Ind Co Ltd | Sealed-type battery |
| WO2004004961A2 (en) * | 2002-07-03 | 2004-01-15 | Fronius International Gmbh | Electrode protection device, spot-welding tool and resistance welding method |
| JP2004082271A (en) * | 2002-08-27 | 2004-03-18 | Honda Motor Co Ltd | Electrode for electric discharge machining and manufacturing method |
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2022
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| JPH1186821A (en) * | 1997-09-09 | 1999-03-30 | Matsushita Electric Ind Co Ltd | Sealed-type battery |
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| Publication number | Publication date |
|---|---|
| CN114883753A (en) | 2022-08-09 |
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