CN219286499U - Secondary battery formation electrolyte backflow system - Google Patents
Secondary battery formation electrolyte backflow system Download PDFInfo
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- CN219286499U CN219286499U CN202320380494.5U CN202320380494U CN219286499U CN 219286499 U CN219286499 U CN 219286499U CN 202320380494 U CN202320380494 U CN 202320380494U CN 219286499 U CN219286499 U CN 219286499U
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 86
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 152
- 238000001035 drying Methods 0.000 claims abstract description 11
- 230000008676 import Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000008961 swelling Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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Abstract
The utility model discloses a secondary battery formation electrolyte backflow system which comprises a negative pressure source, a gas-liquid separator, a first switch, a second switch, a liquid collector, a normal pressure drying gas source, a third switch, a fourth switch and a flowmeter. The air outlet of the gas-liquid separator is communicated with a negative pressure source; the inlet of the first switch is communicated with the liquid injection port of the battery cell, the outlet of the first switch is communicated with the inlet of the second switch, and the outlet of the second switch is communicated with the air inlet of the gas-liquid separator; the liquid outlet of the gas-liquid separator is communicated with the first liquid inlet of the liquid collector; the inlet of the third switch is communicated with the liquid outlet of the gas-liquid separator, and the outlet is communicated with the first liquid inlet of the liquid collector; the inlet of the fourth switch is communicated with the liquid outlet of the liquid collector, and the outlet of the fourth switch is communicated with the outlet of the first switch; the inlet of the flowmeter is communicated with the outlet of the fourth switch, and the outlet is communicated with the outlet of the first switch. The electrolyte automatically flows back into the battery through negative pressure, so that the battery is prevented from swelling when the electrolyte flows back, and the reliability is high.
Description
Technical Field
The utility model relates to the technical field of battery formation, in particular to a secondary battery formation electrolyte backflow system.
Background
The main mode of activating the performance of the secondary battery in the production process of the secondary battery is charging activation of a formation cabinet, in the negative pressure formation process of the secondary battery, the negative pressure formation equipment regulates the gas in the battery through a pressure control system, the gas generated in the battery formation process is extracted from a liquid injection port of the battery through a negative pressure vacuum system, and in the process, part of electrolyte in the battery can be pumped into a temporary storage container (a residual liquid cup or a waste liquid cup) along with the gas, so that the electrolyte is wasted.
In order to avoid the waste of electrolyte, a positive pressure drying system is generally adopted to charge dry gas into a container to re-inject the electrolyte into the battery, but the quantity of the charged dry gas is difficult to control, so that redundant dry gas can enter the battery, and the battery shell is inflated, scrapped and even exploded, so that the damage and the loss are large.
Therefore, it is desirable to provide a secondary battery chemical electrolyte reflow system to solve the above problems.
Disclosure of Invention
The utility model provides a secondary battery formation electrolyte backflow system, which enables electrolyte to automatically flow back into a battery through negative pressure, avoids the phenomenon of battery bulge when the electrolyte is backflow, and has simple structure and higher working reliability.
To achieve the purpose, the utility model adopts the following technical scheme:
the secondary battery formation electrolyte backflow system comprises a negative pressure source, a gas-liquid separator, a first switch, a second switch, a liquid collector, a third switch, a fourth switch and a flowmeter;
the negative pressure source is used for providing negative pressure, the gas outlet of gas-liquid separator with the negative pressure source intercommunication, the import of first switch with the notes liquid mouth intercommunication of battery, the export of first switch with the import intercommunication of second switch, the export of second switch with the gas inlet intercommunication of gas-liquid separator, the liquid outlet of gas-liquid separator with the first inlet intercommunication of liquid collector, be equipped with the pressure release mouth on the liquid collector, the pressure release mouth with normal pressure dry air source intercommunication, the import of third switch with the liquid outlet intercommunication of gas-liquid separator, the export of third switch with the first inlet intercommunication of liquid collector, the import of fourth switch with the liquid outlet intercommunication of liquid collector, the export of fourth switch with the export intercommunication of first switch, the import of flowmeter with the export intercommunication of fourth switch, the export of flowmeter with the export intercommunication of first switch.
Optionally, the method further comprises:
and the inlet of the proportional valve is communicated with the air outlet of the gas-liquid separator, and the outlet of the proportional valve is communicated with the negative pressure source.
Optionally, the method further comprises:
and the inlet of the fifth switch is communicated with the normal pressure drying air source, and the outlet of the fifth switch is communicated with the pressure relief opening.
Optionally, the liquid collector has at least a portion of the structure that is transparent in color.
Optionally, the method further comprises:
a liquid level sensor disposed within the liquid collector;
the liquid supply device is communicated with the second liquid inlet of the liquid collector;
the liquid level sensor and the liquid supply device are in signal connection with the control module, and the control module can control the liquid supply device to input electrolyte for the liquid collector according to the liquid level signal transmitted by the liquid level sensor.
Optionally, the liquid level sensor is a contact type liquid level sensor or a non-contact type liquid level sensor.
Optionally, the negative pressure source comprises a vacuum pump.
Optionally, the first switch is an electromagnetic valve; and/or:
the second switch is an electromagnetic valve; and/or:
the third switch is an electromagnetic valve; and/or:
the fourth switch is an electromagnetic valve;
the secondary battery formation electrolyte backflow system further comprises a control module, the flowmeter, the first switch, the second switch, the third switch and the fourth switch are all in signal connection with the control module, and the control module can control the opening and closing of the first switch, the second switch, the third switch and the fourth switch according to flow signals of the flowmeter.
Optionally, the fifth switch is a vent valve.
The utility model has the beneficial effects that:
the utility model provides a secondary battery formation electrolyte backflow system which comprises a negative pressure source, a gas-liquid separator, a first switch, a second switch, a liquid collector, a normal pressure drying gas source, a third switch, a fourth switch and a flowmeter. When the battery is subjected to negative pressure formation, the first switch, the second switch and the third switch are turned on, the fourth switch is turned off, gas carrying electrolyte in the battery enters the gas-liquid separator under the action of a negative pressure source, the gas-liquid separator separates the gas from the electrolyte, the gas is discharged through the negative pressure source, and the electrolyte flows into the liquid collector for storage, and at the moment, the inside of the battery is in a negative pressure environment; after the negative pressure formation of the battery is completed, the second switch and the third switch are closed, the fourth switch and the first switch are opened, and the liquid collector is always in a normal pressure state, so that electrolyte in the liquid collector can automatically flow into the battery in the negative pressure state, waste of the electrolyte is avoided, meanwhile, the risk that external gas enters the inside of the battery is avoided, swelling of the battery is avoided, and protection of the battery is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic diagram of a secondary battery formation electrolyte backflow system according to an embodiment of the present utility model.
In the figure:
1. a negative pressure source; 2. a gas-liquid separator; 3. a first switch; 4. a second switch; 5. a battery; 6. a liquid collector; 7. a normal pressure drying air source; 8. a third switch; 9. a fourth switch; 10. a flow meter; 11. a proportional valve; 12. a fifth switch; 13. and a liquid supply device.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The embodiment provides a secondary battery becomes electrolyte backflow system, makes electrolyte flow back to battery 5 in through negative pressure is automatic, compares with adopting positive pressure drying system to make electrolyte flow back among the prior art, can avoid the battery 5 bulge phenomenon to appear when electrolyte flows back, simple structure, and operational reliability is higher.
Specifically, as shown in fig. 1, the secondary battery formation electrolyte backflow system includes a negative pressure source 1, a gas-liquid separator 2, a first switch 3, a second switch 4, a liquid collector 6, an atmospheric drying gas source 7, a third switch 8, a fourth switch 9, and a flow meter 10. Wherein the negative pressure source 1 is used for providing negative pressure, and the negative pressure source 1 is optionally but not limited to a vacuum pump. The gas outlet of the gas-liquid separator 2 is communicated with the negative pressure source 1, and the gas-liquid separator 2 is used for separating electrolyte from humid gas carrying the electrolyte. The inlet of the first switch 3 is communicated with the liquid injection port of the battery 5, the outlet of the first switch 3 is communicated with the inlet of the second switch 4, the outlet of the second switch 4 is communicated with the air inlet of the gas-liquid separator 2, the negative pressure source 1 is started, the gas carrying electrolyte in the battery 5 is pumped out, and enters the gas-liquid separator 2 to wait for separation. The liquid outlet of the gas-liquid separator 2 is communicated with the first liquid inlet of the liquid collector 6, the liquid collector 6 is provided with a pressure relief opening, the pressure relief opening is communicated with the normal pressure dry gas source 7, electrolyte separated by the gas-liquid separator 2 is stored in the liquid collector 6, in order to ensure that the electrolyte can smoothly flow into the liquid collector 6 and cannot be influenced by the interference of external humid gas, the quality of the electrolyte is influenced, the liquid collector 6 is communicated with the normal pressure dry gas source 7 through the pressure relief opening, the normal pressure dry gas source 7 can enable the electrolyte in the liquid collector 6 to keep normal pressure, and the electrolyte cannot automatically enter the battery 5 because the normal pressure dry gas source 7 is normal pressure, so that the inflation and the bulge of the battery 5 are avoided. The inlet of the third switch 8 is communicated with the liquid outlet of the gas-liquid separator 2, and the outlet of the third switch 8 is communicated with the first liquid inlet of the liquid collector 6. An inlet of the fourth switch 9 is communicated with a liquid outlet of the liquid collector 6, and an outlet of the fourth switch 9 is communicated with an outlet of the first switch 3. The inlet of the flow meter 10 is in communication with the outlet of the fourth switch 9, and the outlet of the flow meter 10 is in communication with the outlet of the first switch 3.
The working process of the secondary battery formation electrolyte backflow system is as follows:
in the negative pressure formation stage of the battery 5: the first switch 3, the second switch 4 and the third switch 8 are opened, the fourth switch 9 is closed, under the action of the negative pressure source 1, the gas carrying the electrolyte is discharged from the battery 5 and enters the gas-liquid separator 2 to be separated, the separated gas is discharged through the negative pressure source 1, the electrolyte flows into the liquid collector 6 to be stored, and the inside of the battery 5 is in a negative pressure state.
Electrolyte backflow stage: at this time, the negative pressure formation of the battery 5 is finished, the first switch 3 and the fourth switch 9 are turned on, the second switch 4 and the third switch 8 are turned off, and since the inside of the liquid collector 6 is normal pressure and the pressure is higher than the pressure inside the battery 5, the electrolyte in the liquid collector 6 automatically flows back into the battery 5, the flow meter 10 displays the amount of electrolyte flowing back into the battery 5, when the flow meter 10 is not changed any more, the electrolyte in the liquid collector 6 is indicated not to flow back into the battery 5 any more, at this time, if the electrolyte flowing back into the battery 5 displayed by the flow meter 10 reaches a preset value, the reflux is finished, and the preset value can be obtained according to experiments, and in the embodiment, the preset value is 6g-8g; if the electrolyte flowing back into the battery 5, which is displayed by the flowmeter 10, does not reach the preset value, the negative pressure source 1 is started again, the first switch 3, the second switch 4 and the third switch 8 are turned on, the fourth switch 9 is turned off, the inside of the battery 5 is in a negative pressure state again, then the second switch 4 and the third switch 8 are turned off, the fourth switch 9 is turned on, the liquid in the liquid collector 6 continuously flows back into the battery 5, and the process is circulated for a plurality of times until the electrolyte flowing back into the battery 5 reaches the preset value.
The secondary battery formation electrolyte backflow system provided by the embodiment enables electrolyte in the liquid collector 6 to automatically flow back into the battery 5 through negative pressure in the battery 5, so that waste of the electrolyte is avoided, and material cost of the battery 5 is reduced. And can guarantee not having external gas to get into in the battery 5, avoided battery 5 to damage because of inflating the bulge, be favorable to protecting battery 5.
Further, in the present embodiment, the first switch 3 may be, but is not limited to, a solenoid valve, similarly, the second switch 4 may be, but is not limited to, a solenoid valve, the third switch 8 may be, but is not limited to, a solenoid valve, the fourth switch 9 may be, but is not limited to, a solenoid valve, the secondary battery formed electrolyte backflow system further includes a control module, and the flow meter 10, the first switch 3, the second switch 4, the third switch 8, and the fourth switch 9 are all in signal connection with the control module, and the control module is capable of controlling the opening and closing of the first switch 3, the second switch 4, the third switch 8, and the fourth switch 9 according to the flow signal of the flow meter 10, thereby realizing intelligent control of the secondary battery formed electrolyte backflow system. Since the electrolyte has a certain corrosiveness, the first switch 3, the second switch 4, the third switch 8 and the fourth switch 9 can be made of a corrosion-resistant material.
It should be noted that, specific forms of the "control module" in the present application include, but are not limited to, PLC and the like.
Optionally, the secondary battery formation electrolyte backflow system further comprises a proportional valve 11, wherein an inlet of the proportional valve 11 is communicated with an air outlet of the gas-liquid separator 2, and an outlet of the proportional valve 11 is communicated with the negative pressure source 1. Through setting up proportional valve 11, can adjust the extraction amount of negative pressure source 1 in a flexible way according to the size of the required negative pressure in the battery 5, reduce the risk of excessive extraction, improve the stability of negative pressure source 1 work.
Optionally, the secondary battery formation electrolyte backflow system further comprises a fifth switch 12, an inlet of the fifth switch 12 is communicated with the normal pressure drying air source 7, and an outlet of the fifth switch 12 is communicated with the pressure relief opening. When the secondary battery formation electrolyte backflow system works, the fifth switch 12 is in a normally open state, and when the secondary battery formation electrolyte backflow system is not required to be used or the system is not required to be maintained, the fifth switch 12 can be closed, so that the waste of the normal pressure drying air source 7 is avoided. The fifth switch 12 is optionally but not limited to a vent valve.
Preferably, in order to facilitate observation of the amount of electrolyte in the liquid collector 6, the liquid collector 6 has at least a part of its structure which is transparent in color. The liquid collector 6 may be a residue cup or a waste cup.
In the secondary battery formation electrolyte backflow system, when the secondary battery formation electrolyte backflow system is initially used, part of the electrolyte may be present in the liquid collector 6, or no electrolyte may be present, or if the liquid collector 6 is initially empty of electrolyte, the battery 5 that is initially subjected to negative pressure formation may not backflow the electrolyte, and the electrolyte stored in the liquid collector 6 may be used for the battery 5 that is subjected to negative pressure formation in the next batch, as long as the electrolyte is not wasted.
Further, the secondary battery formation electrolyte backflow system further includes a liquid level sensor (not shown in the figure), a liquid supply device 13, and a control module (not shown in the figure), wherein the liquid level sensor is disposed in the liquid collector 6, for detecting the liquid level of the electrolyte in real time. The liquid collector 6 is further provided with a second liquid inlet, and the liquid supply device 13 is in communication with the second liquid inlet of the liquid collector 6, the liquid supply device 13 being capable of delivering electrolyte to the liquid collector 6. The liquid level sensor and the liquid supply device 13 are both in signal connection with a control module, and the control module can control the liquid supply device 13 to input electrolyte for the liquid collector 6 according to the liquid level signal transmitted by the liquid level sensor. Through setting up liquid supply equipment 13 and level sensor, can guarantee that the electrolyte in the liquid collector 6 remains sufficient all the time, and then guarantee that battery 5 after the negative pressure formation can both flow back a certain amount of electrolyte (namely when the quantity of electrolyte in liquid collector 6 can not satisfy the required electrolyte reflux quantity of battery 5, set up liquid supply equipment 13 and just can supply liquid collector 6 to satisfy the required electrolyte reflux quantity of battery 5 can both flow back in the battery 5 after the negative pressure formation), be favorable to batch production. Optionally, the liquid level sensor can be a contact type liquid level sensor or a non-contact type liquid level sensor, and the liquid level sensor can be arranged according to actual needs.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (9)
1. The secondary battery formation electrolyte backflow system is characterized by comprising a negative pressure source (1), a gas-liquid separator (2), a first switch (3), a second switch (4), a liquid collector (6), an atmospheric drying gas source (7), a third switch (8), a fourth switch (9) and a flowmeter (10);
the negative pressure source (1) is used for providing the negative pressure, the gas outlet of gas-liquid separator (2) with negative pressure source (1) intercommunication, the import of first switch (3) with annotate liquid opening intercommunication of battery (5), the export of first switch (3) with the import intercommunication of second switch (4), the export of second switch (4) with the air inlet intercommunication of gas-liquid separator (2), the liquid outlet of gas-liquid separator (2) with the first inlet intercommunication of liquid collector (6), be equipped with the pressure release opening on liquid collector (6), the pressure release opening with atmospheric pressure dry air source (7) intercommunication, the import of third switch (8) with the liquid outlet intercommunication of gas-liquid separator (2), the export of third switch (8) with the first inlet opening intercommunication of liquid collector (6), the import of fourth switch (9) with the first inlet opening intercommunication of liquid collector (6), the export of fourth switch (9) with the export of fourth switch (10) intercommunication, the export of fourth switch (9) with the export (10) intercommunication.
2. The secondary battery formation electrolyte backflow system according to claim 1, further comprising:
the inlet of the proportional valve (11) is communicated with the air outlet of the gas-liquid separator (2), and the outlet of the proportional valve (11) is communicated with the negative pressure source (1).
3. The secondary battery formation electrolyte backflow system according to claim 1, further comprising:
and the inlet of the fifth switch (12) is communicated with the normal pressure drying air source (7), and the outlet of the fifth switch (12) is communicated with the pressure relief opening.
4. The secondary battery formation electrolyte backflow system according to claim 1, wherein at least part of the structure of the liquid collector (6) is transparent in color.
5. The secondary battery formation electrolyte recirculation system according to any one of claims 1 to 4, further comprising:
a liquid level sensor disposed within the liquid collector (6);
a liquid supply device (13) communicated with the second liquid inlet of the liquid collector (6);
the liquid level sensor and the liquid supply device (13) are both in signal connection with the control module, and the control module can control the liquid supply device (13) to input electrolyte for the liquid collector (6) according to a liquid level signal transmitted by the liquid level sensor.
6. The secondary battery formation electrolyte return system of claim 5, wherein the liquid level sensor is a contact type liquid level sensor or a non-contact type liquid level sensor.
7. The secondary battery formation electrolyte backflow system according to any one of claims 1 to 4, wherein the negative pressure source (1) includes a vacuum pump.
8. The secondary battery formation electrolyte backflow system according to any one of claims 1 to 4, wherein the first switch (3) is a solenoid valve; and/or:
the second switch (4) is an electromagnetic valve; and/or:
the third switch (8) is an electromagnetic valve; and/or:
the fourth switch (9) is an electromagnetic valve;
the secondary battery formation electrolyte backflow system further comprises a control module, the flowmeter (10), the first switch (3), the second switch (4), the third switch (8) and the fourth switch (9) are connected with the control module through signals, and the control module can control the first switch (3), the second switch (4), the third switch (8) and the fourth switch (9) to be opened and closed according to flow signals of the flowmeter (10).
9. The secondary battery formation electrolyte backflow system according to claim 3, wherein the fifth switch (12) is a vent valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320380494.5U CN219286499U (en) | 2023-03-03 | 2023-03-03 | Secondary battery formation electrolyte backflow system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320380494.5U CN219286499U (en) | 2023-03-03 | 2023-03-03 | Secondary battery formation electrolyte backflow system |
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| Publication Number | Publication Date |
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| CN219286499U true CN219286499U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320380494.5U Active CN219286499U (en) | 2023-03-03 | 2023-03-03 | Secondary battery formation electrolyte backflow system |
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| CN (1) | CN219286499U (en) |
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2023
- 2023-03-03 CN CN202320380494.5U patent/CN219286499U/en active Active
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