CN107834017B - Isobaric liquid injection device and method for lithium battery - Google Patents
Isobaric liquid injection device and method for lithium battery Download PDFInfo
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- CN107834017B CN107834017B CN201711062711.1A CN201711062711A CN107834017B CN 107834017 B CN107834017 B CN 107834017B CN 201711062711 A CN201711062711 A CN 201711062711A CN 107834017 B CN107834017 B CN 107834017B
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- liquid injection
- clamp mechanism
- sealing
- cavity
- battery
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- 239000007788 liquid Substances 0.000 title claims abstract description 129
- 238000002347 injection Methods 0.000 title claims abstract description 117
- 239000007924 injection Substances 0.000 title claims abstract description 117
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 104
- 238000007789 sealing Methods 0.000 claims abstract description 66
- 239000003792 electrolyte Substances 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 239000003292 glue Substances 0.000 claims description 15
- 230000037452 priming Effects 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses an isobaric liquid injection device of a lithium battery and a liquid injection method thereof, comprising a liquid injection mechanism, a separated upper clamp mechanism and a separated lower clamp mechanism; the vacuum pumping sealing rod is arranged in the liquid injection mechanism to realize the sealing and vacuum pumping of the cavity during the liquid injection of the battery; the equal pressure inflation process of the inner cavity and the outer cavity of the battery is carried out when the liquid is injected through the inner pressure air inlet of the cup body arranged on the liquid injection mechanism and the outer pressure air inlet of the cavity arranged on the upper clamp mechanism, compared with the prior art, the equal pressure inflation process has the following advantages: on one hand, the structure is simple, the operation is convenient, the requirement on the working environment is low, the energy is saved, the consumption is reduced, and the equipment cost is low; on the other hand effectively reduces the notes liquid time, can carry out the notes liquid operation of a plurality of batteries simultaneously, promotes notes liquid efficiency, increases the absorption effect of the inside electrolyte of battery, avoids the battery to annotate the bulge phenomenon emergence after the liquid.
Description
Technical Field
The invention relates to the field of battery lithium battery priming devices, in particular to a lithium battery isopiestic priming device and a priming method thereof.
Background
When the traditional lithium battery liquid injection production is carried out, the liquid injection hole of the battery box is smaller, the liquid injection processing can be carried out one by one only by adopting the mode of manual needle tube liquid injection, the liquid injection precision and the production efficiency are lower, and the research of liquid injection operation on the lithium battery by utilizing an automatic device is more and more along with the increasingly popularization of automatic processing at present; the main principle of the existing liquid injection device is negative pressure back suction type liquid injection, namely, the inside of a battery box is sucked into negative pressure, the battery box is connected with electrolyte through a pipeline, so that a pressure difference is formed between the inside of the battery box and the space where the electrolyte is located, and the electrolyte is automatically sucked into the inside of the battery box by utilizing the pressure difference, so that automatic liquid injection is completed. The electrolyte injection device solves the manual problem, but the electrolyte inside the battery after the electrolyte injection is not ideal in absorption effect, low in efficiency and easy to bulge.
In chinese patent CN104466083a, a liquid injection method in the production process of lithium battery is disclosed, which is to pump high vacuum to the lithium battery for a period of time, then to input nitrogen gas of 0.5-0.7MPa at constant speed, and then to pump low vacuum again, and to keep high pressure for about 60 s.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a lithium battery equal-pressure liquid injection device and a liquid injection method thereof, which improve the liquid injection efficiency and solve the problem of swelling after liquid injection of a battery.
The technical scheme is as follows: in order to achieve the above purpose, the present invention adopts the following technical scheme: the isobaric liquid injection device of the lithium battery comprises a liquid injection mechanism, an upper clamp mechanism and a lower clamp mechanism; the upper clamp mechanism and the lower clamp mechanism are of separable structures, a plurality of upper cavities are arranged in the upper clamp mechanism in parallel, and a plurality of lower cavities with the same shape as the upper cavities are arranged in the lower clamp mechanism in parallel; the upper clamp mechanism and the lower clamp mechanism are in a locking sealing state when closed;
the liquid injection mechanism is consistent in number and corresponding in position to the upper cavity and the lower cavity, and is respectively and fixedly connected to the upper surface of the upper clamp mechanism, the lower part of the liquid injection mechanism is connected inside the upper clamp mechanism in an embedded manner and is communicated with a liquid injection glue nozzle arranged on the upper cavity, and a battery slot clamp is arranged in the lower clamp mechanism;
a vacuum pumping sealing rod penetrating to the lower cavity is arranged in the liquid injection mechanism; when the vacuumizing sealing rod is lifted up, the upper cavity is sealed and vacuumized; the liquid injection mechanism is provided with a cup body internal pressure air inlet; the upper part of the upper clamp mechanism is provided with a cavity external pressure air inlet communicated with the upper cavity.
The locking sealing state of the upper clamp mechanism and the lower clamp mechanism is locked and sealed through a clamp sealing ring arranged between two clamp tightening buckles and contact surfaces arranged on two sides; and when the locking sealing state is fully ensured, the sealing performance between the upper clamp mechanism and the lower clamp mechanism and between the cavities is good.
In some embodiments, the priming mechanism includes a priming cup, a priming port, and a priming port sealing mechanism; the liquid injection cup sequentially comprises a cover body, a cup body and a discharge spout from top to bottom; the leakage nozzle is connected in the upper clamp mechanism in an embedded manner; the cover body is provided with a liquid injection port; the upper part of the liquid injection port is provided with a liquid injection port sealing mechanism; the vacuumizing sealing rod penetrates through the center of the cover body and sequentially penetrates through the cup body and the leakage nozzle to the liquid injection glue nozzle on the lower cavity, and a sealing glue head matched with the liquid injection glue nozzle is arranged at the tail end of the vacuumizing sealing rod.
The cup body is a cylinder, and has uniform flow velocity when liquid injection is carried out.
The discharge spout is the open-ended toper structure in the cone bottom, and the flow is controllable when guaranteeing to annotate the liquid.
In order to enable the liquid injection mechanism to be firmly fixed on the upper clamp mechanism, the liquid injection mechanism is fixed on the upper surface of the upper clamp mechanism through an upper fixing plate, a lower fixing plate and four fixing columns positioned at four corners.
When the vacuum sealing rods are multiple, the upper ends of the vacuum sealing rods are fixed in parallel through the long fixing plates, and when the vacuum operation is carried out, the vacuum sealing rods can work simultaneously at one time, so that the working efficiency is improved, and the vacuum pumping uniformity is ensured.
The lifting hooks for the manipulators to grasp are arranged on two sides of the upper clamp mechanism, and controllability is stronger when the manipulators are lifted and opened or shifted.
In order to further strengthen the stability of the mechanical arm hoisting, the number of the lifting hooks is four, and two sides of the upper clamp mechanism are respectively provided with two lifting hooks.
The invention also discloses a liquid injection method using the lithium battery isobaric liquid injection device, which comprises the following steps:
(1) Firstly, utilizing the lifting operation of a vacuumizing sealing rod, sealing a liquid injection rubber nozzle by a sealing rubber head, vacuumizing a battery aiming at a liquid injection port of a lithium battery, removing a sealing mechanism of the liquid injection port after vacuumizing to-90-100 kpa, returning a liquid injection cup to a normal pressure state, and injecting liquid into the liquid injection cup; sealing by a liquid injection port sealing mechanism after liquid injection is finished;
(2) Lifting a vacuumizing sealing rod, and enabling electrolyte to automatically flow downwards; the inner cavity is subjected to nitrogen input through the inner pressure air inlet of the cup body until the pressure is 75-85kpa, and the outer cavity is subjected to nitrogen input through the outer pressure air inlet of the cavity until the pressure is 95-105kpa, and the mixture is kept stand for 45s; repeating the nitrogen input cycle of the inner cavity and the outer cavity for 9 times; and (5) completing the liquid injection process.
The beneficial effects are that: the novel lithium battery isobaric liquid injection device and the liquid injection method thereof disclosed by the invention have the following advantages: on one hand, the structure is simple, the operation is convenient, the requirement on the working environment is low, the energy is saved, the consumption is reduced, and the equipment cost is low; on the other hand effectively reduces the notes liquid time, can carry out the notes liquid operation of a plurality of batteries simultaneously, promotes notes liquid efficiency, increases the absorption effect of the inside electrolyte of battery, avoids the battery to annotate the bulge phenomenon emergence after the liquid.
Drawings
Fig. 1 is a schematic view showing the structure of the back side of the isopiestic liquid injection device for lithium battery of example 1 of the present invention;
fig. 2 is a schematic diagram showing the front side structure of the isopiestic liquid injection device for lithium battery of example 1 of the present invention;
fig. 3 is a schematic diagram showing the structure of the lithium battery isopiestic liquid injection device according to example 1 of the present invention in a right view.
Detailed Description
The present invention is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the invention and not limiting of its scope, and various modifications of the invention, which are equivalent to those skilled in the art upon reading the invention, will fall within the scope of the invention as defined in the appended claims.
Example 1:
referring to fig. 1-3, the invention discloses an isobaric liquid injection device of a lithium battery, which comprises a liquid injection mechanism 1, an upper clamp mechanism 2 and a lower clamp mechanism 3; the upper clamp mechanism 1 and the lower clamp mechanism 3 are of separable structures, two lifting hooks 7 for being gripped by a manipulator are respectively arranged on two sides of the upper clamp mechanism 2, when the upper clamp mechanism and the lower clamp mechanism are separated or shifted, the lifting of the lifting hooks 7 by the manipulator is realized, and the arrangement of the four lifting hooks 7 has stronger lifting and shifting stability.
8 upper cavities 21 are arranged in the upper clamp mechanism 2 in parallel, and 8 lower cavities 31 with the same shape as the upper cavities 21 are arranged in the lower clamp mechanism 3 in parallel; the upper clamp mechanism 2 and the lower clamp mechanism 3 are in a locking and sealing state when closed; the locking sealing state of the upper clamp mechanism 2 and the lower clamp mechanism 3 is locked and sealed through two clamp tightening buckles 5 arranged on two sides and a clamp sealing ring 6 arranged between contact surfaces; the sealing performance between the upper clamp mechanism and the lower clamp mechanism and between the cavities is good when the locking and sealing state is fully ensured; the clamp tightening buckle 5 can be slidably adjusted on the upper and lower clamps.
A battery slot clamp 31 is arranged in the lower clamp mechanism 3; when the upper and lower clamp mechanisms are separated and opened, the battery is conveyed to the battery groove clamp 31 by the mechanical arm to be filled with liquid.
The number of the liquid injection mechanisms 1 is consistent with that of the upper cavities and the lower cavities, the positions of the liquid injection mechanisms are corresponding to 8, and the liquid injection mechanisms are respectively fixed on the upper surface of the upper clamp mechanism 2 through an upper fixing plate, a lower fixing plate and four fixing columns positioned at four corners.
The liquid injection mechanism 1 comprises a liquid injection cup, a liquid injection port 14 and a liquid injection port sealing mechanism 141; the liquid injection cup sequentially comprises a cover body 11, a cup body 12, a discharge spout 13 and a vacuumizing sealing rod 15 penetrating through a liquid injection glue nozzle 22 of the lower cavity 21 from top to bottom; the cup body 12 is a cylinder, and has uniform flow rate when filling liquid; the discharge spout 13 is of a conical structure with an opening at the bottom of a cone, so that the flow rate during liquid injection is controllable.
The discharge spout 13 is connected in an embedded manner in the upper clamp mechanism 2; the cover body 11 is provided with a liquid injection port 14; the upper part of the liquid injection port 14 is provided with a liquid injection port sealing mechanism 141; the vacuumizing sealing rod 15 penetrates through the center of the cover 11 and sequentially penetrates through the cup 12 and the discharge spout 13 to the liquid injection glue nozzle 22 on the lower cavity 21, and a sealing glue head 151 matched with the liquid injection glue nozzle 22 is arranged at the tail end of the vacuumizing sealing rod 15; when the vacuum sealing rod 15 is lifted up, the upper cavity 21 is sealed and vacuumized.
The upper ends of the vacuum sealing rods 15 are fixed in parallel through the strip-shaped fixing plates 152, and when the vacuum operation is performed, a plurality of vacuum sealing rods can work simultaneously at a time, so that the working efficiency is increased, and the vacuum uniformity is ensured.
The liquid injection mechanism 1 is provided with a cup body internal pressure air inlet 16; the upper part of the upper clamp mechanism 2 is provided with a cavity external pressure air inlet 4 communicated with the upper cavity 21, and the upper clamp mechanism is used for injecting isobaric nitrogen into the liquid injection cup body and the cavities of the upper clamp and the lower clamp respectively after vacuumizing and liquid injection so as to accelerate the flow speed of electrolyte into the battery.
The invention also discloses a liquid injection method using the lithium battery isobaric liquid injection device, which comprises the following steps:
(1) Firstly, hoisting an upper clamp mechanism 2 and a lower clamp mechanism 3 by using a mechanical arm, separating the four lifting hooks 7, conveying a battery into a battery groove clamp 31 in the lower clamp mechanism 3 by using the mechanical arm to be injected, aligning a battery liquid injection port with a liquid injection glue nozzle 22, aligning the positions of the upper clamp mechanism and the lower clamp mechanism by using mechanical motion, clamping a clamp buckle 5 by using two clamps arranged on two sides and a clamp sealing ring 6 arranged between contact surfaces to carry out locking sealing, lifting by using a vacuumizing sealing rod 15 at the moment, so that the whole upper cavity 21 and the whole lower cavity 31 are in a sealing state, vacuumizing the inside of the battery, pressing down the vacuumizing sealing rod 15 after-95 kpa is pumped, opening a liquid injection port sealing mechanism 141, injecting liquid into a liquid injection cup by using the liquid injection port 14, and after the liquid injection is finished, pressing down and sealing the liquid injection port sealing mechanism 141 to seal the liquid injection port 14;
(2) Lifting the vacuumizing sealing rod 15, and enabling electrolyte to automatically flow downwards; the inner cavity is subjected to nitrogen input through the inner pressure air inlet 16 of the cup body until the pressure is 80kpa, and the outer cavity is subjected to nitrogen input through the outer pressure air inlet 4 of the cavity until the pressure is 100kpa, and the mixture is kept stand for 45s; repeating the nitrogen input cycle of the inner cavity and the outer cavity for 9 times; and (5) completing the liquid injection process. And repeated input of nitrogen with equal pressure in the inner cavity and the outer cavity is performed repeatedly, so that the flowing speed of electrolyte to the inside of the battery is effectively accelerated, the equal pressure balance effect is provided for the inside and the outside of the battery, and the swelling phenomenon of the battery is avoided.
According to the invention, the liquid injection time of the battery is effectively reduced, the liquid injection efficiency is improved, the absorption effect of electrolyte in the battery is effectively improved through the equal-pressure balanced inflation arrangement of the internal pressure and the external pressure of the battery, the swelling phenomenon of the battery is avoided, and the subsequent charge and discharge effects of the battery are well improved.
Claims (8)
1. The isobaric liquid injection device of the lithium battery is characterized by comprising a liquid injection mechanism (1), an upper clamp mechanism (2) and a lower clamp mechanism (3); the upper clamp mechanism (2) and the lower clamp mechanism (3) are of separable structures, a plurality of upper cavities (21) are arranged in the upper clamp mechanism in parallel, and a plurality of lower cavities (31) with the same shape as the upper cavities (21) are arranged in the lower clamp mechanism (3) in parallel; the upper clamp mechanism (2) and the lower clamp mechanism (3) are in a locking and sealing state when closed;
the liquid injection mechanism (1) is consistent with the upper cavity and the lower cavity in number and corresponding in position, and is fixedly connected to the upper surface of the upper clamp mechanism (2) respectively, the lower part of the liquid injection mechanism (1) is connected inside the upper clamp mechanism (2) in an embedded mode and is communicated with a liquid injection glue nozzle (22) arranged on the upper cavity (21), and a battery slot clamp is arranged in the lower clamp mechanism (3);
a vacuum pumping sealing rod (15) penetrating to the lower cavity (31) is arranged in the liquid injection mechanism (1); when the vacuumizing sealing rod (15) is lifted up, the upper cavity is sealed and vacuumized; the liquid injection mechanism (1) is provided with a cup body internal pressure air inlet (16); the upper part of the upper clamp mechanism (2) is provided with a cavity external pressure air inlet (4) communicated with the upper cavity (21);
the locking sealing state of the upper clamp mechanism (2) and the lower clamp mechanism (3) is locked and sealed through two clamp tightening buckles (5) arranged on two sides and a clamp sealing ring (6) arranged between contact surfaces;
the liquid injection mechanism (1) comprises a liquid injection cup, a liquid injection port (14) and a liquid injection port sealing mechanism (141); the liquid injection cup sequentially comprises a cover body (11), a cup body (12) and a discharge spout (13) from top to bottom; the discharge spout (13) is connected in the upper clamp mechanism (2) in an embedded mode; the cover body (11) is provided with a liquid injection port (14); the upper part of the liquid injection port (14) is provided with a liquid injection port sealing mechanism (141); the vacuum sealing rod (15) penetrates through the center of the cover body (11) and sequentially penetrates through the cup body (12) and the leakage nozzle (13) to the liquid injection glue nozzle (22) on the lower cavity (31), and a sealing glue head (151) matched with the liquid injection glue nozzle (22) is arranged at the tail end of the vacuum sealing rod (15).
2. The lithium battery isopiestic priming device of claim 1, wherein: the cup body (12) is a cylinder.
3. The lithium battery isopiestic priming device of claim 1, wherein: the discharge spout (13) is of a conical structure with a conical bottom opening.
4. The lithium battery isopiestic priming device of claim 1, wherein: the liquid injection mechanism (1) is fixed on the upper surface of the upper clamp mechanism (2) through an upper fixing plate, a lower fixing plate and four fixing columns positioned at four corners.
5. The lithium battery isopiestic priming device of claim 1, wherein: when the number of the vacuumizing sealing rods (15) is multiple, the upper ends of the vacuumizing sealing rods are fixed in parallel through the long fixing plates (152).
6. The lithium battery isopiestic priming device of claim 1, wherein: and lifting hooks (7) for being gripped by mechanical arms are arranged on two sides of the upper clamp mechanism (2).
7. The lithium battery isopiestic priming device of claim 6, wherein: the number of the lifting hooks (7) is four, and two sides of the upper clamp mechanism (2) are respectively provided with two lifting hooks.
8. A liquid injection method using the lithium battery isopiestic liquid injection device according to claim 1, characterized by comprising the steps of:
(1) Firstly, a sealing glue head (151) is used for sealing a liquid injection glue nozzle (22) by lifting a vacuumizing sealing rod (15), a liquid injection port of a lithium battery is aligned for vacuumizing the battery, after the battery is vacuumized to-90-100 kpa, a liquid injection port sealing mechanism (141) is removed, a liquid injection cup returns to a normal pressure state, and liquid injection is carried out on the liquid injection cup; sealing by using a liquid injection port sealing mechanism (141) after liquid injection is finished;
(2) Lifting a vacuumizing sealing rod (15), and enabling electrolyte to automatically flow downwards; the inner cavity is subjected to nitrogen input through the inner pressure air inlet (16) of the cup body until the pressure is 75-85kpa, and the outer cavity is subjected to nitrogen input through the outer pressure air inlet (4) of the cavity until the pressure is 95-105kpa, and the mixture is kept stand for 45s; repeating the nitrogen input cycle of the inner cavity and the outer cavity for 9 times; and (5) completing the liquid injection process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711062711.1A CN107834017B (en) | 2017-11-02 | 2017-11-02 | Isobaric liquid injection device and method for lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711062711.1A CN107834017B (en) | 2017-11-02 | 2017-11-02 | Isobaric liquid injection device and method for lithium battery |
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| CN107834017A CN107834017A (en) | 2018-03-23 |
| CN107834017B true CN107834017B (en) | 2024-03-19 |
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| CN109216645B (en) * | 2018-10-15 | 2021-07-06 | 合肥国轩高科动力能源有限公司 | Liquid injection device for isobaric standing of lithium battery |
| CN109713210B (en) * | 2019-03-06 | 2023-07-07 | 深圳市新世纪自动化科技有限公司 | Isobaric liquid injection device and method of liquid injection machine |
| CN111416095B (en) * | 2020-02-28 | 2022-08-09 | 合肥国轩高科动力能源有限公司 | Liquid supplementing device of lithium ion cylindrical battery |
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| CN113725562B (en) * | 2021-08-20 | 2024-02-27 | 南通科瑞恩智能装备有限公司 | Annotate liquid anchor clamps and annotate liquid machine |
| CN113725564A (en) * | 2021-08-20 | 2021-11-30 | 南通科瑞恩智能装备有限公司 | Liquid injection clamp and liquid injection machine |
| CN113793943B (en) * | 2021-08-28 | 2024-03-29 | 广东兆能科技有限公司 | Efficient electrolyte infiltration device for manufacturing lithium battery with deformation and bulge prevention |
| CN115020942A (en) * | 2022-06-28 | 2022-09-06 | 江苏中关村嘉拓新能源设备有限公司 | Liquid injection device for automatically sealing battery and preparation process |
| CN116885314B (en) * | 2023-07-11 | 2023-12-12 | 东莞市冠逸自动化科技有限公司 | Equal-pressure formation and liquid injection integrated machine for battery |
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