CN114543956B - Device and method for collecting and detecting free electrolyte amount of soft-package lithium battery - Google Patents
Device and method for collecting and detecting free electrolyte amount of soft-package lithium battery Download PDFInfo
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- CN114543956B CN114543956B CN202111405924.6A CN202111405924A CN114543956B CN 114543956 B CN114543956 B CN 114543956B CN 202111405924 A CN202111405924 A CN 202111405924A CN 114543956 B CN114543956 B CN 114543956B
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- free electrolyte
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 68
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005303 weighing Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 abstract description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 229910001416 lithium ion Inorganic materials 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013211 curve analysis Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/22—Weigh pans or other weighing receptacles; Weighing platforms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses a device and a method for collecting and detecting free electrolyte of a soft-package lithium battery, comprising a workbench and pressurizing equipment on the workbench, wherein the workbench is provided with a groove into which the soft-package lithium battery can be placed, the pressurizing equipment comprises driving equipment and a pressurizing plate which is connected with the driving equipment and can move up and down, the pressurizing plate is positioned above the groove, the groove can accommodate the pressurizing plate, the edge of the bottom of the groove is provided with a through hole, a collecting barrel is arranged below the through hole, a thorn cone is arranged in the collecting barrel, and the upper end part of the thorn cone is positioned in the through hole. The pressurizing plate is matched with the groove to pressurize the soft package lithium battery placed in the groove, free electrolyte in the soft package lithium battery is extruded to the through hole to expand, and the free electrolyte flows into the collecting barrel after being pierced by the piercing cone in the through hole, so that three working procedures of extrusion, piercing and collecting can be completed.
Description
Technical Field
The invention relates to a detection device for a soft-package lithium ion battery, in particular to a device for collecting and detecting the free electrolyte quantity of the soft-package lithium ion battery.
Background
The soft-packed lithium ion battery is a power supply which is composed of positive and negative active substances, electrolyte, a diaphragm, an outer package and other parts and can mutually convert electric energy and chemical energy, and is also called as a soft-packed battery because an aluminum plastic film is used as the outer package of the battery. The electrolyte in the soft-pack lithium ion battery may be partially adsorbed in the positive and negative electrode active materials and the separator or remain in the remaining space of the package, and this part of the electrolyte is also called a free electrolyte. The current scheme for detecting the free electrolyte amount of the soft-package lithium ion battery mainly utilizes a clamping plate to fix the battery core, and after the free electrolyte is concentrated to one end of the battery core by manually extruding the clamping plate, an aluminum plastic film is scratched, the weight of the free electrolyte is collected and weighed, and due to uncertainty of human factors, the free electrolyte amount in the battery core cannot be accurately collected, and meanwhile, the consumption of manpower and material resources and time cost is relatively high, so that a more automatic machine is needed for collecting the free electrolyte, for example, an AGM separator electrolyte collecting device disclosed in China patent literature, the publication number of which is CN111929109A comprises a collecting box, a base positioned above the collecting box, a rotating mechanism for rotating the base, a fixing plate for fixing a separator on the base, an air bag positioned on one side of the fixing plate far away from the base, an air pipe for communicating two ends of the air bag and an extruding mechanism for extruding the air bag from top to bottom; the extrusion mechanism comprises a bracket, an extrusion roller rotationally connected to the lower end of the bracket, a supporting plate positioned on one side of the bracket and used for supporting an air bag, an adjusting cylinder positioned on the bracket and used for adjusting the distance between the bracket and the supporting plate, and a manipulator connected to the bracket, and the extrusion mechanism is used for extrusion, so that the purposes of time and labor saving can be achieved, but a puncturing device is lacked, and a soft-package lithium battery still needs to be manually punctured.
Disclosure of Invention
The invention aims to solve the problem that the existing device for collecting the free electrolyte amount of a soft-package lithium ion battery lacks a puncturing function, and provides a device for collecting the free electrolyte amount of the soft-package lithium ion battery, which has the functions of squeezing, puncturing and collecting.
The invention is realized by the following technical scheme:
the utility model provides a collect device of soft packet of lithium ion battery free electrolyte volume, includes the pressurization equipment on workstation and the workstation, be provided with the recess that can put into soft packet of lithium ion battery on the workstation, the pressurization equipment includes driving device and the pressurization board that can reciprocate that links to each other with driving device, and the pressurization board is located the recess top, and the recess can hold the pressurization board, and recess bottom edge is provided with the through-hole, is provided with the collecting vessel under the through-hole, is provided with thorn awl in the collecting vessel, and the upper end portion of thorn awl is located the through-hole. The pressurizing plate is matched with the groove to pressurize the soft package lithium battery placed in the groove, free electrolyte in the soft package lithium battery is extruded to the through hole to expand, and the free electrolyte flows into the collecting barrel after being pierced by the piercing cone in the through hole, so that three working procedures of extrusion, piercing and collecting can be completed.
Preferably, the driving device comprises a hydraulic machine and a connecting column for connecting the pressurizing plate and the hydraulic machine, and the hydraulic machine is used for driving the pressurizing plate, so that the pressure can be conveniently controlled, and the pressure is stable.
Preferably, the area of the notch of the groove is larger than the area of the bottom of the groove, and the area of the lower part of the pressurizing plate is smaller than the area of the upper part of the pressurizing plate, so that the pressurizing plate can conveniently enter the groove.
Preferably, the bottom of the collecting barrel is provided with a weighing instrument, the collecting barrel is not connected with the workbench, and the quality of free electrolyte in the collecting barrel can be displayed in real time, so that the recording is convenient.
Preferably, the top on the thorn awl is provided with the swell, and the sharp-pointed position of thorn awl is higher than the swell, and after the sharp-pointed position of thorn awl punctures the plastic-aluminum membrane, owing to the smooth free electrolyte that is unfavorable for on thorn awl surface flows, consequently through setting up the swell, can increase the thorn crack, continue to expand in the through-hole when soft packet lithium cell for after the thorn crack passes through the swell, the puncture can not contact with thorn awl, ensures free electrolyte and flows.
Preferably, the collecting vessel is provided with the collecting coaming near the bottom, the collecting coaming is provided with the collecting hole, the thorn awl passes from the collecting hole, thorn awl bottom is provided with the sealing plate that can prevent that liquid from passing through the collecting hole, the sealing plate bottom is provided with the spring, collecting vessel bottom is connected to the spring bottom, can deposit a certain amount of electrolyte on the collecting coaming, continue to expand in the through-hole when soft packet lithium cell, because the existence of bulge, electrolyte is difficult to flow when the thorn mouth is located drum package upper portion, the thorn awl receives decurrent pressure and transmits for the spring for the sealing plate moves down, then the electrolyte on the collecting coaming can flow to the collecting vessel bottom from the collecting hole, until all electrolyte is run out, owing to lack the pressure of electrolyte, the spring can support sealing plate sealed up the collecting hole this moment. Thereafter, the soft-packed lithium battery continues to expand in the through hole, the puncture is lower than the bulge, and new free electrolyte flows into the collecting vessel.
Preferably, the collecting coaming is inclined from the collecting barrel wall to the collecting hole, the bottom surface of the collecting barrel corresponding to the sealing piece is higher than the periphery, and the flow of electrolyte is quickened.
Preferably, the driving device comprises a driving hand rocker and a screw rod capable of converting driving moment of the driving hand rocker into upper and lower power, the screw rod is connected with the pressurizing plate, and the pressurizing plate is controlled by manually driving the hand rocker, so that the control and the observation are convenient.
Preferably, a control system and a control panel for controlling the hydraulic press and the weighing instrument are arranged on the workbench, so that the manual real-time observation and control are convenient.
Preferably, a method for detecting free electrolyte amount of the device for collecting free electrolyte amount of soft package lithium ion battery comprises the following steps:
s1: setting the maximum stroke and the constant pressure value of the pressurizing plate through the control panel;
s2: placing the soft-package lithium battery into the groove, starting the hydraulic press through the control panel, enabling the pressurizing plate to move downwards and starting to squeeze the soft-package lithium battery;
s3: stopping pressurizing when the data transmitted to the control panel by the weighing instrument is not changed any more, and returning the pressurizing plate to the initial position;
s4: and outputting and analyzing a data curve of the weighing instrument to obtain the mass of the free electrolyte of the soft-package lithium battery.
Therefore, the invention has the following beneficial effects:
the pressurizing plate is matched with the groove to pressurize the soft package lithium battery, and the thorn cone is arranged in the through hole, so that free electrolyte in the soft package lithium battery can be just punctured by the thorn cone when being extruded to the through hole to expand, and the free electrolyte flows into the collecting barrel, and the puncturing and collecting procedures are completed while extruding for one time.
Drawings
FIG. 1 is a schematic side view of a first embodiment of the invention;
fig. 2 is a schematic side view of a second embodiment of the present invention.
In the figure: the device comprises a workbench 1, a groove 2, a through hole 21, a pressurizing plate 3, a pressure sensor 31, a collecting barrel 4, a thorn cone 41, a bulge 411, a sealing piece 412, a collecting coaming 42, a collecting hole 421, an outflow interface 43, a hydraulic press 5, a connecting column 6, a weighing instrument 7, a soft package lithium battery 8, a control panel 9, a driving hand lever 10 and a screw rod 101.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The first embodiment is shown in fig. 1, a device for collecting free electrolyte of a soft-package lithium ion battery, which comprises a workbench 1 and a pressurizing device on the workbench, wherein a groove 2 capable of placing a soft-package lithium ion battery 8 is arranged on the workbench 1, the pressurizing device comprises a driving device and a pressurizing plate 3 which is connected with the driving device and can move up and down, the pressurizing plate 3 is positioned above the groove 2, the pressurizing plate 3 can be accommodated in the groove 2, a through hole 21 is arranged at the edge of the bottom of the groove 2, a collecting barrel 4 is arranged below the through hole 21, a thorn cone 41 is arranged in the collecting barrel 4, and the upper end part of the thorn cone 41 is positioned in the through hole 21. The drive device comprises a hydraulic machine 5 and a connecting column 6 for connecting the pressurizing plate 3 to the hydraulic machine. The area of the notch of the groove 2 is larger than the area of the bottom of the groove, the area of the lower part of the pressurizing plate 3 is smaller than the area of the upper part, and the outer contour of the pressurizing plate 3 and the inner contour of the groove 2 are matched with each other. The bottom of the collecting barrel 4 is provided with a weighing instrument 7, and the collecting barrel 4 is not connected with a workbench. The top on the thorn awl 41 is provided with the bulge 411, and the sharp-pointed position of thorn awl 41 exceeds bulge 411, and after the sharp-pointed position of thorn awl 41 punctures the plastic-aluminum membrane, because the smoothness of thorn awl 41 surface is unfavorable for the outflow of free electrolyte, consequently through setting up bulge 411, can increase the thorn crack, continue to expand in through-hole 21 when soft packet lithium cell for after the puncture passes through bulge 411, the puncture can not contact with thorn awl 41, ensures that free electrolyte flows.
The collecting vessel 4 is close to the bottom and is provided with collecting coaming 42, collecting coaming 42 is provided with collecting hole 421, thorn awl 41 passes from collecting hole 421, thorn awl 41 bottom is provided with the sealing plate 412 that can prevent that liquid from passing through collecting hole 421, sealing plate 412 bottom is provided with the spring, collecting vessel 4 bottom is connected to the spring bottom, collecting coaming 42 is by collecting vessel 4 wall to collecting hole 421 department slope, collecting vessel 4 bottom surface that sealing plate 412 corresponds is higher than all around, collecting vessel 4 bottom is provided with outflow interface 43, the container that can be connected to be used for depositing the electrolyte, retrieve the recycle to the electrolyte. The collecting shroud 42 can store a certain amount of electrolyte, when the soft package lithium battery 8 continues to expand in the through hole 21, due to the bulge 411, the electrolyte is not easy to flow out when the puncture is positioned at the upper part of the bulge 411, the puncture cone 41 is subjected to downward pressure and is transferred to the spring, so that the sealing piece 412 moves downwards, the electrolyte on the collecting shroud 42 can flow from the collecting hole 421 to the bottom of the collecting barrel 4 until all the electrolyte flows out, and the spring can support the sealing piece 412 to seal the collecting hole 421 due to the lack of the pressure of the electrolyte. Thereafter, the soft pack lithium battery continues to expand in the through hole 21 with the puncture being lower than the bulge 411, and new free electrolyte flows into the collection tub 4.
The workbench is provided with a control system and a control panel 9 for controlling the hydraulic press and the weighing instrument 7, so that the manual real-time observation and control are convenient.
The using method comprises the following steps:
s1: setting the maximum stroke and the constant pressure value of the pressurizing plate 3 through the control panel;
s2: putting the soft package lithium battery into the groove 2, starting the hydraulic press through the control panel, enabling the pressurizing plate 3 to move downwards and starting to squeeze the soft package lithium battery;
s3: stopping pressurizing when the data transmitted to the control panel by the weighing instrument 7 is not changed any more, and returning the pressurizing plate 3 to the initial position;
s4: outputting and analyzing a data curve of the weighing instrument 7 to obtain the mass of the free electrolyte of the soft-package lithium battery;
s5: a container for storing an electrolyte is connected to the outflow port 43, and the electrolyte is collected.
For S4, the data curve obtained for the collecting shroud 42, whether or not there was electrolyte left over from the last use of the device, is from an initial value of m0 to m1, then to m2, and then to m3, so that m 3-m 2 is the mass of free electrolyte.
The first embodiment has the advantages that:
(1) The pressurizing plate 3 is matched with the groove 2 to pressurize the soft-package lithium battery, and the puncture cone 41 is arranged in the through hole 21, so that when free electrolyte in the soft-package lithium battery is extruded to the through hole 21 to expand, the free electrolyte is just punctured by the puncture cone 41, and flows into the collecting barrel 4, and the puncturing and collecting procedures are completed at the same time of one extrusion;
(2) The mass of free electrolyte is readily obtained by data curve analysis of the weighing instrument 7.
In a second embodiment of the present invention,
the utility model provides a collect device of soft packet of lithium ion battery free electrolyte volume, as shown in fig. 2, includes the pressurization equipment on workstation and the workstation, be provided with the recess 2 that can put into the battery on the workstation, the pressurization equipment includes the drive arrangement and the pressurization board 3 that can reciprocate that links to each other with the drive arrangement, pressurization board 3 is located recess 2 top, recess 2 slightly is greater than pressurization board 3, just can hold whole pressurization board 3, recess 2 bottom edge is provided with through-hole 21, be provided with control system and the control panel that is used for controlling hydraulic press and weighing instrument 7 on the workstation, the drive arrangement includes drive hand rocker 10 and can be with the lead screw 101 of drive hand rocker's drive moment conversion upper and lower power, the lead screw links to each other with pressurization board 3, control pressurization board 3 through manual drive hand rocker, be provided with pressure sensor 31 under the pressurization board 3 can with pressure data transmission to control system, make things convenient for manual control and observation. When the electrolyte collecting device is used, the driving hand rocker is rocked, pressurization is stopped after the data of the control panel reach a set pressure value obtained according to experience, the pressure plate can be lifted to return to an initial state until the weighing data are not changed, and an outflow interface 43 is arranged at the bottom of the collecting barrel 4 and used for collecting the electrolyte.
Claims (8)
1. The utility model provides a collect and detect device of soft packet of lithium cell free electrolyte volume, includes the pressurization equipment on workstation and the workstation, its characterized in that, be provided with the recess that can put into soft packet of lithium cell on the workstation, the pressurization equipment includes driving device and the pressurization board that can reciprocate that links to each other with driving device, the pressurization board is located the recess top, the recess can hold the pressurization board, recess bottom edge is provided with the through-hole, be provided with the collecting vessel under the through-hole, be provided with the thorn awl in the collecting vessel, the upper end portion of thorn awl is located the through-hole, the top on the thorn awl is provided with the bulge, the sharp part of thorn awl is higher than the bulge, the collecting vessel is provided with the collection bounding wall near the bottom, is provided with the collecting hole from the collecting cone, thorn awl passes through the collecting hole, the sealing piece bottom is provided with the spring, the collecting vessel bottom is connected to the spring bottom.
2. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 1, wherein: the driving device comprises a hydraulic machine and a connecting column used for connecting the pressurizing plate and the hydraulic machine.
3. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 2, wherein: the area of the notch of the groove is larger than the area of the bottom of the groove, and the area of the lower part of the pressurizing plate is smaller than the area of the upper part of the pressurizing plate.
4. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 3, wherein: the collecting barrel bottom is provided with the instrument of weighing, and the collecting barrel does not link to each other with the workstation.
5. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 1, wherein: the collecting coaming is inclined from the collecting barrel wall to the collecting hole, and the bottom surface of the collecting barrel corresponding to the sealing piece is higher than the periphery.
6. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 1, wherein: the driving device comprises a driving hand rocker and a screw rod capable of converting driving moment of the driving hand rocker into upper and lower power, and the screw rod is connected with the pressurizing plate.
7. The device for collecting and detecting the free electrolyte amount of a soft-pack lithium battery according to claim 4, wherein: the workbench is provided with a control system and a control panel for controlling the hydraulic press and the weighing instrument.
8. A method of detecting free electrolyte volume of an apparatus for collecting and detecting free electrolyte volume of a soft pack lithium battery as in claim 7, comprising:
s1: setting the maximum stroke and the constant pressure value of the pressurizing plate through the control panel;
s2: placing the soft-package lithium battery into the groove, starting the hydraulic press through the control panel, enabling the pressurizing plate to move downwards and starting to squeeze the soft-package lithium battery;
s3: stopping pressurizing when the data transmitted to the control panel by the weighing instrument is not changed any more, and returning the pressurizing plate to the initial position;
s4: and outputting and analyzing a data curve of the weighing instrument to obtain the mass of the free electrolyte of the soft-package lithium battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405924.6A CN114543956B (en) | 2021-11-24 | 2021-11-24 | Device and method for collecting and detecting free electrolyte amount of soft-package lithium battery |
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| CN202111405924.6A CN114543956B (en) | 2021-11-24 | 2021-11-24 | Device and method for collecting and detecting free electrolyte amount of soft-package lithium battery |
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| CN114543956B true CN114543956B (en) | 2024-04-02 |
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| CN114543956A (en) | 2022-05-27 |
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