CN113884157B - Method for detecting liquid injection uniformity of stacked battery - Google Patents
Method for detecting liquid injection uniformity of stacked battery Download PDFInfo
- Publication number
- CN113884157B CN113884157B CN202111146626.XA CN202111146626A CN113884157B CN 113884157 B CN113884157 B CN 113884157B CN 202111146626 A CN202111146626 A CN 202111146626A CN 113884157 B CN113884157 B CN 113884157B
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- Prior art keywords
- liquid injection
- liquid
- electrolyte
- height
- unit element
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- 239000007788 liquid Substances 0.000 title claims abstract description 105
- 238000002347 injection Methods 0.000 title claims abstract description 101
- 239000007924 injection Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003792 electrolyte Substances 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011245 gel electrolyte Substances 0.000 abstract 1
- 239000002952 polymeric resin Substances 0.000 abstract 1
- 229920003002 synthetic resin Polymers 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
-
- 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
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
-
- 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 invention discloses a method for detecting liquid injection uniformity of a stack battery, which judges the liquid injection uniformity through a height display strip and high polymer resin, and mainly comprises a liquid injection nozzle, a piston, a liquid reservoir, electrolyte, a liquid injection valve, a liquid injection joint and a stack battery unit element, wherein the stack battery unit element comprises an electrohydraulic frame, a pole piece, supporting particles and the height display strip; after the electrolyte is injected into the stacked cell unit, the height display strip changes color to display the injection height after contacting the electrolyte, and the supporting particles slowly absorb the electrolyte to form gel electrolyte after expanding, so that the electrolyte leakage during disassembling the unit is avoided, and the electrolyte can be accurately weighed. The invention judges the liquid injection uniformity of the stack cell by the liquid injection height and the liquid injection amount, and is suitable for the stack type primary liquid injection activated cell.
Description
Technical Field
The invention relates to the technical field of primary batteries, in particular to a method for detecting liquid injection uniformity of a stack battery.
Background
The pile-type battery is formed by superposing and combining a plurality of single elements and positive and negative electrode monopole sheets, and has compact structure and high volume specific energy. The battery body is composed of a plurality of pairs of single elements, redundant connecting pieces are not arranged among the single elements, the single elements are mainly sealed through cementing, and electrolyte is injected into each single element from a common flow channel to activate the battery.
When the electrolyte injection distribution is uneven, the internal resistance of the battery is too large, and the battery cannot be discharged or has abnormal electrical properties under high current density.
After the unit elements are stacked into the body, the liquid injection amount between the unit elements cannot be observed from the outside, the rationality of the flow channel design of the liquid injection system and the electrohydraulic frame cannot be judged, and a special test method is required to be designed for judging the electrolyte of each unit element.
The liquid injection amount is mainly measured by dismantling and weighing each single element, but the electrolyte leakage is easily caused in the dismantling process by the existing structure and method, the test error is large, and the height cannot be displayed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for detecting the uniformity of liquid injection of a stack cell.
The technical scheme adopted for solving the technical problems is as follows: a method for detecting the uniformity of liquid injection of a pile-type battery is provided, wherein the pile-type battery for detection is provided with a pile-type battery unit element comprising an electrohydraulic frame and a pole piece, and a liquid chamber is connected in the electrohydraulic frame through a liquid injection channel, and the method comprises the following steps:
selecting a liquid storage device filled with electrolyte, connecting a liquid injection air nozzle at the front end of the liquid storage device, arranging a piston in the liquid storage device near the liquid injection air nozzle side so that the piston can push the electrolyte to move in the liquid storage device, connecting a liquid injection valve consisting of a liquid injection valve body and a liquid injection valve core capable of moving back and forth in the liquid injection valve body at the rear end of the liquid storage device, and arranging a liquid injection joint for connecting a stack cell unit element on the liquid injection valve body, wherein the liquid injection valve is connected with the stack cell unit element through the liquid injection joint;
bonding a pole piece and a color-changing test paper height display strip in a liquid chamber on the electrohydraulic frame, and bonding hydrophilic group polymer material supporting particles on the surface of the pole piece;
connecting a pile-type battery unit element with an injection joint, introducing high-pressure gas into an injection nozzle, when external high-pressure gas enters through the nozzle, pushing a piston to move forwards by the high-pressure gas, so that electrolyte in a liquid reservoir pushes an injection valve core under the action of pressure, after the injection valve core is opened in place, the electrolyte is injected into the pile-type battery unit element through the injection joint, then enters a liquid chamber after passing through an injection runner on an electro-hydraulic frame, and the color of a height display bar is gradually changed along with the rising of the electrolyte, so that the injection height is displayed in real time;
after the electrolyte injection is finished, the supporting particles on the pole piece slowly absorb the electrolyte to form gel state and lock the electrolyte;
after the electrolyte is fully absorbed into gel state by the supporting particles after the electrolyte is placed for a plurality of hours, removing each piece of stacked cell unit elements of the stacked cell piece by piece, measuring and photographing to record the height of a height display strip on each piece of unit elements, namely the liquid injection height of each piece of stacked cell unit elements;
accurately weighing the mass of each pile-type battery unit element by using an electronic balance, wherein the mass difference between the electronic balance and each pile-type battery unit element before liquid injection is the liquid injection amount of each pile-type battery unit element;
by comparing the injection height and the injection amount of each stack cell unit element of the stack cell, the injection uniformity of the whole stack cell can be analyzed.
The height display strip of the method for detecting the uniformity of the liquid injection of the stack battery is PH test paper, water detection test paper, other color-changing test paper and the like.
According to the method for detecting the uniformity of the liquid injection of the stack battery, the supporting particles are water-absorbent resin particles or other hydrophilic group polymer materials.
The invention has the following advantages and positive effects:
according to the invention, the height display strip is added to the liquid chamber on the stacked battery unit element, the electrolyte is changed in color after the height display strip contacts the electrolyte after being injected from the liquid reservoir, and the height of the electrolyte in each unit element can be effectively judged through the height display strip when the stacked battery unit element is removed.
2, the electrolyte is slowly absorbed by the supporting particles on the pole pieces to form gel, so that the electrolyte in the single elements can be effectively locked, the electrolyte leakage during the disassembly of the single elements is avoided, and the liquid injection amount of each stacked cell single element can be accurately weighed after the disassembly.
The method is simple, the injection of the electrolyte between the single elements is not influenced, the electrolyte quantity between the single elements can be effectively judged, and the injection uniformity of the battery pack is analyzed.
Drawings
FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the present invention;
FIG. 2 is a schematic illustration of the liquid injection process of the present invention;
FIG. 3 is a schematic view of the present invention after the end of the injection.
The reference numerals are as follows: 1-air tap, 2-piston, 3-reservoir, 4-electrolyte, 5-liquid injection valve, 51-liquid injection valve core, 52-liquid injection valve body, 6-liquid injection connector, 7-stack cell unit element, 71-electrohydraulic frame, 72-pole piece, 73-supporting particle and 74-height display strip.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of the structure before the injection of the present invention, fig. 2 is a schematic view of the structure in the injection of the present invention, fig. 3 is a schematic view of the structure after the injection of the present invention, and as shown in fig. 1 to 3, the stack cell for detection has a plurality of stack cell unit elements 7, and each stack cell unit element 7 includes an electro-hydraulic frame 71 and a pole piece 72, and a liquid chamber is connected in the electro-hydraulic frame 71 through an injection flow channel.
The front end of a liquid storage device 3 filled with electrolyte 4 is connected with a liquid injection air nozzle 1, a piston 2 is arranged in the liquid storage device 3 near the liquid injection air nozzle 1, the rear end of the liquid storage device 3 is connected with a liquid injection valve 5 consisting of a liquid injection valve body 52 and a liquid injection valve core 51 capable of moving back and forth in the liquid injection valve body 52, and a liquid injection joint 6 is arranged on the liquid injection valve body 52.
A pole piece 72 and a color-changing test paper height display strip 74 are adhered in a liquid chamber on the electrohydraulic frame 71, and hydrophilic group polymer material supporting particles 73 are adhered on the surface of the pole piece 72.
When external high-pressure gas enters through the gas tap 1, the high-pressure gas pushes the piston 2 to move forwards, electrolyte 4 in the liquid reservoir 3 pushes the liquid injection valve core 51 under the action of pressure, after the liquid injection valve core 51 is opened in place, the electrolyte 4 is injected into the single element 7 through the liquid injection joint 6, the electrolyte 4 enters the liquid chamber after passing through the liquid injection flow channel on the electrohydraulic frame 71, and along with the rising of the electrolyte 4, the color of the height display strip 74 is gradually changed, and the liquid injection height is displayed in real time; when the injection of the electrolyte 4 is completed, the supporting particles 73 on the pole piece 72 slowly absorb the electrolyte 4 to form gel state to lock the electrolyte 4.
After leaving for several hours, after the electrolyte 4 is completely absorbed into gel state by the supporting particles 73, each unit piece is removed piece by piece, the height of the height display strip 74 on each unit piece is recorded and measured by photographing, the mass of each unit piece is accurately weighed by an electronic balance, and the mass of each unit piece is poor from that before the liquid injection, namely the liquid injection amount of each unit piece.
By comparing the liquid injection amount and the liquid injection height of each single element of the stack cell, the liquid injection uniformity of the whole stack cell group can be analyzed.
The foregoing is illustrative only and not limiting, and any person skilled in the art, having the benefit of the teachings disclosed herein, may make modifications and variations to the equivalent embodiments, and it should be understood that any modifications and equivalents that do not depart from the spirit and scope of the invention are intended to be encompassed by the scope of the claims.
Claims (3)
1. The utility model provides a heap battery annotates liquid homogeneity detection method for detect heap battery unit cell (7) that contain electrohydraulic frame (71) and pole piece (72), be connected with the liquid room through annotating the liquid passageway in electrohydraulic frame (71), its characterized in that: comprises the following steps of
Selecting a liquid storage device (3) filled with electrolyte (4), connecting a liquid injection air nozzle (1) at the front end of the liquid storage device (3), arranging a piston (2) in the liquid storage device (3) close to the liquid injection air nozzle (1), connecting a liquid injection valve (5) consisting of a liquid injection valve body (52) and a liquid injection valve core (51) capable of moving back and forth in the liquid injection valve body (52) at the rear end of the liquid storage device (3), and arranging a liquid injection joint (6) on the liquid injection valve body (52);
a pole piece (72) and a color-changing test paper height display strip (74) are adhered in a liquid chamber on the electrohydraulic frame (71), and hydrophilic group polymer material supporting particles (73) are adhered on the surface of the pole piece (72);
connecting a pile-type battery unit element (7) with a liquid injection joint (6), introducing high-pressure gas into a liquid injection nozzle (1), pushing a piston (2) to move forwards, enabling electrolyte (4) in a liquid reservoir (3) to push a liquid injection valve core (51), and after the liquid injection valve core (51) is opened in place, injecting the electrolyte (4) into the pile-type battery unit element (7) through the liquid injection joint (6), then entering a liquid chamber, gradually changing the color of a height display strip (74), and displaying the liquid injection height in real time;
after the injection of the electrolyte (4) is finished, the supporting particles (73) on the pole piece (72) slowly absorb the electrolyte (4) to form gel and lock the electrolyte (4);
removing each piece of stacked cell unit elements (7) of the stacked cell piece by piece, and measuring and recording the height of the height display strip (74) to obtain the liquid injection height of each piece of stacked cell unit elements (7);
accurately weighing the mass of each pile type battery unit element (7), wherein the mass difference between the mass of each pile type battery unit element (7) and the mass of each pile type battery unit element (7) before liquid injection is the liquid injection amount of each pile type battery unit element (7);
by comparing the injection height and the injection amount of each stack cell unit element (7) of the stack cell, the injection uniformity of the whole stack cell is analyzed.
2. The method for detecting the uniformity of liquid injection of a stacked cell according to claim 1, wherein said height indicator strip (74) is a PH test strip or a moisture test strip.
3. The method for detecting the uniformity of liquid injection into a stacked cell as claimed in claim 1, wherein said supporting particles (73) are water-absorbent resin particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146626.XA CN113884157B (en) | 2021-09-28 | 2021-09-28 | Method for detecting liquid injection uniformity of stacked battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146626.XA CN113884157B (en) | 2021-09-28 | 2021-09-28 | Method for detecting liquid injection uniformity of stacked battery |
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| Publication Number | Publication Date |
|---|---|
| CN113884157A CN113884157A (en) | 2022-01-04 |
| CN113884157B true CN113884157B (en) | 2024-04-16 |
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| CN202111146626.XA Active CN113884157B (en) | 2021-09-28 | 2021-09-28 | Method for detecting liquid injection uniformity of stacked battery |
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2021
- 2021-09-28 CN CN202111146626.XA patent/CN113884157B/en active Active
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| CN113884157A (en) | 2022-01-04 |
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