CN214124070U - Liquid injection device for soft package lithium battery - Google Patents
Liquid injection device for soft package lithium battery Download PDFInfo
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- CN214124070U CN214124070U CN202022572515.2U CN202022572515U CN214124070U CN 214124070 U CN214124070 U CN 214124070U CN 202022572515 U CN202022572515 U CN 202022572515U CN 214124070 U CN214124070 U CN 214124070U
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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
Abstract
The utility model belongs to the technical field of soft packet of lithium cell production facility, especially, relate to a soft packet of lithium cell priming device, include: a liquid storage cylinder; the connecting seat is connected to the first end of the liquid storage cylinder and provided with a liquid outlet channel; the push rod component, the liquid storage cylinder and the connecting seat form a liquid storage cavity, and the liquid storage cavity is communicated with the liquid outlet channel; the liquid pumping mechanism comprises a pump machine and a liquid pumping joint, the liquid pumping joint is communicated with a liquid outlet of the pump machine, and the liquid pumping joint is communicated with the liquid storage cavity; the first end of the liquid injection needle is connected with the outlet of the liquid outlet channel; and the switching valve mechanism controls the liquid outlet channel to be communicated so as to enable the liquid injection needle to be communicated with the liquid storage cavity, or controls the liquid outlet channel to be closed so as to enable the liquid injection needle to be disconnected with the liquid storage cavity and the liquid pumping connector. The technical scheme is applied to solve the problems that the existing liquid injection device has bubbles in the electrolyte in the liquid injection process, the electrolyte is easy to splash, the liquid injection needle has liquid dropping, and the liquid injection efficiency is low.
Description
Technical Field
The utility model belongs to the technical field of soft packet of lithium cell production facility, especially, relate to a soft packet of lithium cell priming device.
Background
The liquid injection precision of the electrolyte of the soft package lithium battery is an important process in the production and manufacturing process of the battery, and the liquid injection precision of the electrolyte can influence the consistency and the safety of the whole battery.
Most of the existing liquid injection devices applied to the production of soft package lithium batteries are directly injected into the lithium batteries through a liquid injection pump to inject electrolyte into the lithium batteries through pipelines and liquid injection needles. The structure has the advantages of simple structure and low cost, but the liquid injection efficiency is low, and the speed of the equipment is difficult to increase when the liquid injection operation is carried out with large capacity and high efficiency. In addition, the existing liquid injection device also has the defects of air bubbles in the electrolyte in the liquid injection process, easy splashing of the electrolyte, liquid injection needle dropping liquid and the like, and the liquid injection precision of the electrolyte in the production process of the soft package lithium battery is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a soft packet of lithium cell priming device aims at solving current priming device and has to annotate liquid in-process electrolyte and exist bubble, electrolyte and splash, annotate the liquid needle dropping liquid easily, annotate the problem of liquid inefficiency.
In order to achieve the above object, the utility model adopts the following technical scheme: a liquid injection device for a soft package lithium battery comprises: a liquid storage cylinder; the connecting seat is connected to the first end of the liquid storage cylinder and provided with a liquid outlet channel; the end part of the push rod assembly is inserted into the liquid storage cylinder from the second end of the liquid storage cylinder, the push rod assembly, the liquid storage cylinder and the connecting seat form a liquid storage cavity, and the liquid storage cavity is communicated with the liquid outlet channel; the liquid pumping mechanism comprises a pump machine and a liquid pumping connector, the liquid pumping connector is communicated with a liquid outlet of the pump machine, the liquid pumping connector is assembled on the connecting seat, and the liquid pumping connector is communicated with the liquid storage cavity; the first end of the liquid injection needle is connected to the outlet of the liquid outlet channel, and the second end of the liquid injection needle is a free end; and the switch valve mechanism is assembled in the liquid outlet channel, controls the liquid outlet channel to be communicated so as to enable the liquid injection needle to be communicated with the liquid storage cavity, or controls the liquid outlet channel to be closed so as to enable the liquid injection needle to be disconnected with the liquid storage cavity and the pump liquid joint.
Optionally, soft packet of lithium cell priming device still includes the controller and annotates liquid power portion, pump machine and ooff valve mechanism and realizes controlling by the controller, annotates liquid power portion and provides to annotate liquid power to push rod assembly.
Optionally, the putter assembly includes: the push rod main body is provided with a communicating channel; the valve body mounting seat is connected to the first end of the push rod main body and is provided with a valve cavity and a communication port, the valve cavity is communicated with the communication channel, and the communication port is communicated with the valve cavity; the sliding top shaft is assembled in the valve cavity; the check valve spring is assembled in the valve cavity and provides sealing elasticity for abutting against the opening of the sealing communication passage for the sliding top shaft; and the inert gas inlet mechanism comprises an air inlet joint, the air inlet joint is arranged at the second end of the push rod main body, and the air inlet joint is communicated with the communicating channel.
Optionally, the switching valve mechanism comprises: the switch piston is arranged in the assembly space, the liquid outlet channel penetrates through the assembly space, and the switch piston is assembled in the assembly space; the switch spring is assembled in the assembling space, one end of the switch spring abuts against the inner wall of the assembling space, the other end of the switch spring abuts against the first end of the switch piston, and the switch spring provides switch elastic force for closing the liquid outlet channel for the switch piston; and the driving part is controlled by the controller and provides driving force for overcoming the elastic force of the switch for the switch piston.
Optionally, the driving part is a compressed air pump mechanism, the compressed air pump mechanism includes an air pump and an air connector, the air connector is communicated with a pump air port of the air pump, the air connector is communicated with the assembly space, and the air pump is electrically connected with the controller.
Alternatively, the switching valve mechanism is a solenoid-operated valve.
Optionally, the pump liquid mechanism further includes a pump liquid control valve, the pump liquid control valve is electrically connected to the controller, and the pump liquid control valve is used for controlling the connection or the disconnection between the liquid outlet of the pump and the pump liquid joint.
Optionally, the outline of the valve body mounting seat is conical, and the communication port is arranged at the conical tip of the valve body mounting seat; the inner wall profile of the connecting seat is a cone matched with the appearance profile of the valve body mounting seat, and an opening for communicating the liquid outlet channel with the liquid storage cavity is formed in the cone tip of the connecting seat.
Optionally, the push rod body, the valve body mounting seat, the liquid storage cylinder and the connecting seat are made of stainless steel or ceramic materials.
Alternatively, compressed nitrogen is used as the inert gas in the inert gas intake mechanism.
The utility model discloses following beneficial effect has at least:
annotate liquid through this priming device to soft packet of lithium cell, keep in electrolyte through stock solution chamber ration, then pour into soft packet of lithium cell with quantitative electrolyte in to realize the accurate notes liquid, and adopt this priming device to once only accomplish and annotate the liquid, adopt ooff valve mechanism control liquid outlet channel to switch on or close simultaneously, avoided annotating the liquid in-process and had the bubble, also eliminated and annotated the liquid in-process and produced electrolyte and splash, improved and annotated liquid efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of an assembly structure when a push rod main body of a liquid injection device of a soft package lithium battery of an embodiment of the present invention is completely pushed into a liquid storage cylinder and is not in operation when standing;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 2;
FIG. 4 is an enlarged view at C of FIG. 2;
fig. 5 is a schematic view of an assembly structure of the liquid injection device for a soft-package lithium battery according to the embodiment of the present invention when liquid injection into the liquid storage chamber is just started;
FIG. 6 is a cross-sectional view taken in the direction D-D of FIG. 5;
fig. 7 is a schematic view of an assembly structure of the liquid injection device for the soft-package lithium battery according to the embodiment of the present invention when the liquid storage cavity is filled with the electrolyte;
FIG. 8 is a cross-sectional view taken in the direction E-E of FIG. 7;
fig. 9 is an assembly structure diagram of the liquid injection device for the soft-package lithium battery according to the embodiment of the present invention, in which the electrolyte in the liquid storage cavity is completely injected into the soft-package lithium battery;
fig. 10 is a sectional view in the direction F-F in fig. 9.
Wherein, in the figures, the respective reference numerals:
10. a liquid storage cylinder; 20. a connecting seat; 21. a liquid outlet channel; 22. an assembly space; 30. a push rod assembly; 301. a liquid storage cavity; 31. a push rod body; 311. a communication channel; 32. a valve body mounting seat; 321. a valve cavity; 322. a communication port; 33. sliding the top shaft; 34. a check valve spring; 35. an inert gas inlet mechanism; 40. a liquid pumping mechanism; 41. a pump fluid connector; 50. injecting liquid needle; 60. an on-off valve mechanism; 61. a switch piston; 62. a switch spring; 63. a drive section.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in the figures 1 to 2, the embodiment of the utility model provides a soft package lithium battery priming device carries out the ration through this priming device and annotates the liquid operation for soft package lithium battery to reach the purpose of accurate notes liquid. Specifically, this soft packet of lithium cell priming device includes liquid storage cylinder 10, connecting seat 20, push rod subassembly 30, pump liquid mechanism 40, annotates liquid needle 50 and ooff valve mechanism 60, has constituteed this priming device.
In this priming device, connecting seat 20 is connected in the first end of liquid storage barrel 10, connecting seat 20 is equipped with liquid outlet channel 21, push rod assembly 30's tip is inserted in liquid storage barrel 10 from the second end of liquid storage barrel 10, push rod assembly 30, liquid storage barrel 10 and connecting seat 20 form stock solution chamber 301, stock solution chamber 301 and liquid outlet channel 21 intercommunication, push rod assembly 30 carries out the propelling movement to the electrolyte in stock solution chamber 301 (as shown in fig. 6 and fig. 8), make electrolyte pour into in the soft packet of lithium cell into through this liquid outlet channel 21. The liquid pumping mechanism 40 includes a pump (not shown) and a liquid pumping connector 41, the liquid pumping connector 41 is communicated with a liquid outlet of the pump, the liquid pumping connector 41 is assembled on the connecting seat 20, the liquid pumping connector 41 is communicated with the liquid storage cavity 301, the pump pumps the electrolyte stored outside into the liquid storage cavity 301 for temporary storage, and a fixed amount of electrolyte is pumped into the liquid storage cavity 301 each time. Annotate liquid needle 50's first end and connect in liquid outlet channel 21's exit, annotate liquid needle 50's second end and be the free end, annotate the liquid in-process, will annotate liquid needle 50's second end and insert soft package lithium battery in, then drive push rod subassembly 30 extrusion propelling movement electrolyte by liquid outlet channel 21, annotate liquid needle 50 and inject soft package lithium battery into. The switch valve mechanism 60 is assembled in the liquid outlet channel 21, the switch valve mechanism 60 controls the liquid outlet channel 21 to be conducted so as to enable the liquid injection needle 50 to be communicated with the liquid storage cavity 301, the switch valve mechanism 60 needs to be operated to conduct the liquid outlet channel 21 before the push rod assembly 30 is driven to extrude and push the electrolyte in the liquid storage cavity 301, and then the push rod assembly 30 is driven to inject the liquid; after the liquid injection is completed, the switching valve mechanism 60 controls the liquid outlet channel 21 to be closed so as to disconnect the liquid injection needle 50 from the liquid storage cavity 301 and the pump liquid connector 41.
Use the utility model provides an injection device annotates the liquid operation to soft packet of lithium cell, in annotating liquid operation process, carry out quantitative pump liquid to stock solution chamber 301 through the pump machine earlier, after having kept in quantitative electrolyte in stock solution chamber 301, will annotate liquid needle 50 and insert soft packet of lithium cell in, then switch valve mechanism 60 control liquid outlet channel 21 switches on, drive the electrolyte in push liquid chamber 301 of push rod assembly 30 extrusion after that by liquid outlet channel 21, annotate liquid needle 50 and pour into soft packet of lithium cell into. Annotate liquid through this priming device to soft packet of lithium cell, through stock solution chamber 301 electrolyte of keeping in a definite amount, then pour into soft packet of lithium cell with quantitative electrolyte in to realize the accurate notes liquid, and adopt this priming device to once only accomplish and annotate the liquid, adopt ooff valve mechanism 60 control liquid outlet passage 21 to switch on or close simultaneously, avoided annotating the liquid in-process and had the bubble, also eliminated and annotated the liquid in-process and produced electrolyte and splash, improved and annotated liquid efficiency.
In this embodiment, this soft packet of lithium cell priming device still includes controller (not shown) and annotates liquid power portion (not shown), annotates liquid power portion, pump machine and ooff valve mechanism 60 and realizes controlling by the controller to realize automated control and annotate the liquid operation, annotate the liquid in-process, controller control annotates liquid power portion and provides to push rod assembly 30 and annotate liquid power and extrude the propelling movement to the electrolyte of keeping in stock solution chamber 301, further improves and annotates liquid efficiency.
As shown in fig. 2 and 3, in order to further improve the liquid injection precision, the electrolyte stored in the liquid storage chamber 301 is completely injected into the soft package lithium battery (including the electrolyte hung on the wall of the liquid storage chamber 301), therefore, the push rod assembly 30 includes the push rod main body 31, the valve body mounting seat 32, the sliding top shaft 33, the one-way valve spring 34 and the inert gas inlet mechanism 35, and the liquid storage chamber 301 is cleaned by the specially designed push rod assembly 30, so that the electrolyte is more completely sent into the soft package lithium battery. Specifically, the pushrod body 31 is provided with a communication passage 311, the valve body mounting seat 32 is connected to a first end of the pushrod body 31, the valve body mounting seat 32 is provided with a valve cavity 321 and a communication port 322, the valve cavity 321 is communicated with the communication passage 311, the communication port 322 is communicated with the valve cavity 321, the sliding top shaft 33 is assembled in the valve cavity 321, the check valve spring 34 is assembled in the valve cavity 321, and the check valve spring 34 provides sealing elasticity for the sliding top shaft 33 to abut against an opening of the sealing communication passage 311. Thus, the pushrod body 31, the valve body mount 32, the sliding top shaft 33, and the check valve spring 34 constitute a check valve structure, and the sealing elastic force of the check valve spring 34 is such that the sliding top shaft 33 seals the opening of the communication passage 311 at the valve chamber 321 in a normal state. Also, the inert gas intake mechanism 35 includes an intake joint mounted on the second end of the push rod body 31, the intake joint communicating with the communication passage 311. During push rod main part 31 drove valve body mount pad 32 extrusion propelling movement electrolyte and gets into soft packet of lithium cell under the drive of annotating liquid power portion, after the stroke of valve body mount pad 32 finishes, the electrolyte of wall built-up on the 301 chamber wall of surplus stock solution chamber this moment, these surplus electrolytes can fall under self action of gravity and assemble the passageway department of liquid outlet channel 21, because liquid tension influences, electrolyte can not pass through liquid outlet channel 21 smoothly and get into soft packet of lithium cell. At this moment, the air inlet connector is connected with the compressed inert airflow, the compressed inert airflow is introduced into the communicating channel 311 and overcomes the sealing elasticity of the one-way valve spring 34, the one-way valve structure is in an open state, the compressed inert airflow enters the valve cavity 321 and is blown out from the communicating port 322, the communicating port 322 is right opposite to the opening of the liquid outlet channel 21, the compressed inert airflow blows the residual electrolyte into the soft package lithium battery, the residual electrolyte is cleaned, and the more accurate liquid injection effect is achieved.
The inert gas in the inert gas inlet mechanism 35 is compressed nitrogen, the nitrogen is stable in property, and the nitrogen basically does not react with the electrolyte in the soft package lithium battery, so that the stability of the electrolyte can be guaranteed.
As shown in fig. 4, the switching valve mechanism 60 includes a switching piston 61, a switching spring 62 and a driving part 63, and controls the liquid outlet passage 21 to be opened or closed by controlling the switching piston 61 to slide to change the operating position. Specifically, the connection seat 20 is provided with an assembly space 22, the liquid outlet channel 21 penetrates through the assembly space 22, the switch piston 61 is assembled in the assembly space 22, the switch spring 62 is assembled in the assembly space 22, one end of the switch spring 62 abuts against the inner wall of the assembly space 22, the other end of the switch spring 62 abuts against the first end of the switch piston 61, the switch spring 62 provides a switch elastic force for closing the liquid outlet channel 21 for the switch piston 61, and in a normal state, the switch elastic force of the switch spring 62 acts on the switch piston 61 to enable the switch piston 61 to close the liquid outlet channel 21 (and the switch piston 61 also keeps closing the liquid outlet channel 21 in the process of injecting the electrolyte into the liquid storage cavity 301). The driving part 63 is controlled by a controller, and when the liquid injection operation is carried out, the controller controls the driving part 63 to provide driving force for overcoming the switch elastic force for the switch piston 61, so that the liquid outlet channel 21 is conducted by overcoming the switch elastic force of the switch spring 62; after the liquid injection is completed, the controller controls the driving part 63 to cancel the driving force, and the switch piston 61 is restored to the working position for closing the liquid outlet channel 21 under the switch elastic force of the switch spring 62.
Preferably, the driving part 63 of the soft package lithium battery filling device of the present embodiment is a compressed air pump mechanism, and the compressed air generates a force on the switch piston 61 to overcome the switch elastic force of the switch piston 61, so that the liquid outlet channel 21 is conducted. The compressed air pump mechanism includes an air pump (not shown) and an air connector (not shown), the air connector is communicated with a pump air port of the air pump, the air connector is communicated with the assembly space 22, the air pump is electrically connected with the controller, namely, the controller controls the air pump to pump compressed air to the air connector to overcome the switch elastic force of the switch spring 62. Alternatively, the compressed air may be generated without using an air pump, and the air connector may be directly connected to the external compressed air, and the external compressed air that has been generated may be directly used to overcome the switching elastic force of the switching spring 62.
Alternatively, the on-off valve mechanism 60 is an electromagnetic control valve, and the electromagnetic control valve is electrically connected to the controller. Thus, the controller directly controls the electromagnetic control valve to start opening or closing, and can control the liquid outlet channel 21 to be communicated or closed.
In the liquid injection device for the soft-package lithium battery of the embodiment, the liquid pumping mechanism 40 further includes a liquid pumping control valve (not shown), the liquid pumping control valve is electrically connected to the controller, and the liquid pumping control valve is used for controlling the connection or the disconnection between the liquid outlet of the pump and the liquid pumping connector 41. That is, after the pump machine injects a fixed amount of electrolyte into the reservoir 301, the controller controls the pump liquid control valve to close and stops injecting the electrolyte into the reservoir 301 (in the process of pumping the liquid into the reservoir 301 by the pump machine, the controller controls the pump liquid control valve to keep an open state).
As shown in fig. 2, 6, 8 and 10, the outline of the valve body mounting seat 32 is tapered, and the communication port 322 is provided at the tapered tip of the valve body mounting seat 32; the inner wall profile of the connecting seat 20 is a cone shape matched with the outline profile of the valve body mounting seat 32, and an opening of the liquid outlet channel 21 communicated with the liquid storage cavity 301 is arranged at the cone tip of the connecting seat 20. Through the valve body mounting seat 32 and the connecting seat 20 which are designed in a conical shape, the electrolyte hung on the wall of the liquid storage cavity 301 can more easily fall along the inclined plane and gather at the opening of the liquid outlet channel 21. Simultaneously, the valve body mount pad 32 and the connecting seat 20 of toper design, the in-process that comes in is blown at compressed nitrogen gas, and compressed nitrogen gas is cleared up cleanly to stock solution chamber 301 chamber wall to more completely pour into soft packet of lithium cell with electrolyte into.
Further, the push rod main body 31, the valve body mounting seat 32, the liquid storage cylinder 10 and the connecting seat 20 are all made of stainless steel or ceramic materials, and the surfaces of the push rod main body 31, the surfaces of the valve body mounting seat 32, the inner wall surface of the liquid storage cylinder 10 and the inner wall surface of the connecting seat 20 are all processed by special processes, so that the wall hanging degree of the surfaces to the electrolyte is weakened, the residual allowance of the electrolyte on the surfaces is reduced, and even if the electrolyte is remained in a small amount, the electrolyte is easy to fall under the action of self gravity and gather at the opening of the liquid outlet channel 21.
The completion process of one-time liquid injection operation is as follows:
in the normal state of the liquid injection device as shown in fig. 1 and fig. 2, the controller controls the pump liquid control valve to open, and the controller controls the pump to pump the external electrolyte into the liquid storage cavity 301 for temporary storage, as shown in fig. 5 and fig. 6, the push rod assembly 30 is pushed by the electrolyte to slide and extend relative to the liquid storage barrel 10, after the liquid storage cavity 301 temporarily stores a certain amount of electrolyte, as shown in fig. 7 and fig. 8, that is, the liquid storage cavity 301 is filled with the electrolyte, and in the process of filling the liquid storage cavity 301, the on-off valve mechanism 60 is always kept in the closed state. Annotate liquid operation to soft packet of lithium cell, will annotate liquid needle 50 and insert soft packet of lithium cell, then controller control air pump overcomes switch spring 62's switch elasticity to air connector pump sending compressed air to switch on liquid outlet channel 21, controller control annotates liquid power portion and provides to push rod assembly 30 and annotate liquid power and extrude the propelling movement to the electrolyte of keeping in stock solution chamber 301. When the stroke of the valve body mounting seat 32 is completed, as shown in fig. 9 and 10, the controller controls the inert gas inlet mechanism 35 to introduce compressed nitrogen gas, so as to overcome the sealing elasticity of the check valve spring 34 to open the check valve, then the nitrogen gas blows the residual electrolyte into the soft-package lithium battery, and the switch valve mechanism 60 is always kept in an open state during the liquid injection process of the soft-package lithium battery. After the liquid injection to the soft package lithium battery is finished, the controller controls the air pump to stop pumping the compressed air, the switch valve mechanism 60 recovers the closed state, and the liquid injection needle 50 is drawn out from the soft package lithium battery. And then the controller controls to continue pumping the electrolyte to the liquid storage cavity 301 for temporary storage so as to perform the next liquid injection operation, and the process is circulated.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a soft packet of lithium cell priming device which characterized in that includes:
a liquid storage cylinder;
the connecting seat is connected to the first end of the liquid storage barrel and provided with a liquid outlet channel;
the end part of the push rod assembly is inserted into the liquid storage barrel from the second end of the liquid storage barrel, a liquid storage cavity is formed by the push rod assembly, the liquid storage barrel and the connecting seat, and the liquid storage cavity is communicated with the liquid outlet channel;
the liquid pumping mechanism comprises a pump and a liquid pumping connector, the liquid pumping connector is communicated with a liquid outlet of the pump, the liquid pumping connector is assembled on the connecting seat, and the liquid pumping connector is communicated with the liquid storage cavity;
the first end of the liquid injection needle is connected to the outlet of the liquid outlet channel, and the second end of the liquid injection needle is a free end;
the switch valve mechanism is assembled in the liquid outlet channel and controls the liquid outlet channel to be conducted so that the liquid injection needle is communicated with the liquid storage cavity, or the switch valve mechanism controls the liquid outlet channel to be closed so that the liquid injection needle is disconnected with the liquid storage cavity and the pump liquid joint.
2. The liquid injection device for the soft package lithium battery according to claim 1,
the liquid injection device of the soft package lithium battery further comprises a controller and a liquid injection power part, wherein the liquid injection power part is used for controlling the pump and the switch valve mechanism by the controller, and the liquid injection power part provides liquid injection power for the push rod assembly.
3. The liquid injection device for the soft package lithium battery according to claim 2,
the push rod assembly includes:
the push rod main body is provided with a communicating channel;
the valve body mounting seat is connected to the first end of the push rod main body, a valve cavity and a communicating port are formed in the valve body mounting seat, the valve cavity is communicated with the communicating channel, and the communicating port is communicated with the valve cavity;
a sliding top shaft fitted within the valve cavity;
the one-way valve spring is assembled in the valve cavity and provides sealing elasticity for abutting against and sealing the opening of the communication channel for the sliding top shaft;
and the inert gas inlet mechanism comprises an air inlet joint, the air inlet joint is arranged at the second end of the push rod main body, and the air inlet joint is communicated with the communicating channel.
4. The liquid injection device for the soft package lithium battery according to claim 3,
the switching valve mechanism includes:
the connecting seat is provided with an assembly space, the liquid outlet channel penetrates through the assembly space, and the switch piston is assembled in the assembly space;
the switch spring is assembled in the assembling space, one end of the switch spring abuts against the inner wall of the assembling space, the other end of the switch spring abuts against the first end of the switch piston, and the switch spring provides switch elastic force for closing the liquid outlet channel for the switch piston;
a driving part controlled by the controller, the driving part providing a driving force to the switching piston against the switching elastic force.
5. The liquid injection device for the soft package lithium battery according to claim 4,
the drive part is a compressed air pump mechanism, the compressed air pump mechanism comprises an air pump and an air connector, the air connector is communicated with a pump air port of the air pump, the air connector is communicated with the assembling space, and the air pump is electrically connected with the controller.
6. The liquid injection device for the soft package lithium battery according to claim 3,
the switching valve mechanism is an electromagnetic control valve.
7. The liquid injection device for the lithium-ion battery pack according to any one of claims 4 to 6,
the pump liquid mechanism further comprises a pump liquid control valve, the pump liquid control valve is electrically connected with the controller, and the pump liquid control valve is used for controlling the liquid outlet of the pump machine to be communicated or closed with the pump liquid joint.
8. The liquid injection device for the soft package lithium battery according to claim 7,
the valve body mounting seat is conical in outline, and the communication port is arranged at the conical tip of the valve body mounting seat; the inner wall profile of the connecting seat is a cone matched with the appearance profile of the valve body mounting seat, and an opening for communicating the liquid outlet channel with the liquid storage cavity is formed in the cone tip of the connecting seat.
9. The liquid injection device for the soft package lithium battery according to claim 8,
the push rod main part the valve body mounting base the liquid storage cylinder and the connecting base are all made of stainless steel materials or ceramic materials.
10. The liquid injection device for the soft package lithium battery according to claim 3,
and the inert gas in the inert gas inlet mechanism adopts compressed nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572515.2U CN214124070U (en) | 2020-11-06 | 2020-11-06 | Liquid injection device for soft package lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022572515.2U CN214124070U (en) | 2020-11-06 | 2020-11-06 | Liquid injection device for soft package lithium battery |
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| CN214124070U true CN214124070U (en) | 2021-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117293497A (en) * | 2023-11-24 | 2023-12-26 | 深圳市恒永达科技股份有限公司 | Battery liquid injection crystallization-preventing maintenance method and battery liquid injection system |
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2020
- 2020-11-06 CN CN202022572515.2U patent/CN214124070U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117293497A (en) * | 2023-11-24 | 2023-12-26 | 深圳市恒永达科技股份有限公司 | Battery liquid injection crystallization-preventing maintenance method and battery liquid injection system |
| CN117293497B (en) * | 2023-11-24 | 2024-03-08 | 深圳市恒永达科技股份有限公司 | Battery liquid injection crystallization-preventing maintenance method and battery liquid injection system |
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