CN114088519A - Device and method for testing wet resilience of AGM (absorptive glass mat) separator under different compression amounts - Google Patents
Device and method for testing wet resilience of AGM (absorptive glass mat) separator under different compression amounts Download PDFInfo
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 25
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Abstract
The invention provides a device and a method for testing the wet resilience of an AGM separator under different compression amounts, which belong to the technical field of storage batteries. The main frame comprises a bottom support and a vertical beam arranged on the bottom support; the clamping assembly comprises a cushion block arranged on the upper end surface of the base support and a cover plate arranged on the upper end surface of the cushion block; the lifting assembly is arranged on the vertical beam and is connected with a pressure applying end; the data reading assembly comprises a pressure reading component and a displacement reading component, the pressure reading component is arranged on the lifting assembly, and the displacement reading component is arranged on the vertical beam and connected with the lifting assembly; the dropping liquid subassembly is including locating the dropping liquid support of one side of main frame and vertically locating the dropping liquid pipe on the dropping liquid support, and the dropping liquid pipe has the water conservancy diversion mouth through the honeycomb duct connection. The device for testing the wet resilience of the AGM separator under different compression amounts can be used for more deeply knowing and researching the AGM separator.
Description
Technical Field
The invention belongs to the technical field of storage batteries, and particularly relates to a device and a method for testing wet resilience of an AGM separator under different compression amounts.
Background
The valve-controlled sealed lead-acid storage battery has the characteristics of small self-discharge, maintenance-free property, flexible installation position and the like due to the design of barren liquor, and is widely applied to the fields of UPS power supplies, electric bicycles, energy storage power stations, start-stop automobiles and the like.
The battery has different requirements on the battery performance due to different purposes, the assembling tightness of the battery, namely the requirement difference on the compression amount of an AGM separator is large, the compression amount of the separator is different from 20% to 30%, and the assembling pressure has large influence on the performance of the valve-controlled sealed battery, particularly the service life of the battery.
The AGM glass fiber separator is an important component of the valve-regulated lead-acid battery, and the quality of the performance of the separator is closely related to the performance of the storage battery. With the intensive research of storage battery manufacturers on valve-controlled sealed batteries, the wet resilience of the AGM separator has a great influence on the performance of the batteries, but no clear regulation is provided for the detection method and technical indexes of the wet resilience of the AGM separator in the national standard of the separator. In order to further understand and research the AGM separator, the invention provides a device and a method for testing the wet resilience of the AGM separator under different compression amounts.
Disclosure of Invention
The invention provides a device for testing the wet resilience of an AGM separator under different compression amounts, aiming at the limitations of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is an apparatus for testing the wet resilience of an AGM separator under different compression amounts, comprising:
the main frame comprises a bottom support and a vertical beam arranged on the bottom support;
the clamping assembly comprises a cushion block arranged on the upper end surface of the base support and a cover plate arranged on the upper end surface of the cushion block, and the cover plate is matched with the cushion block to clamp the test piece;
the lifting assembly is arranged on the vertical beam and is connected with a pressure applying end, and the lifting assembly drives the pressure applying end to move downwards so as to apply pressure to the test piece through the cover plate;
the data reading assembly comprises a pressure reading component and a displacement reading component, the pressure reading component is arranged on the lifting assembly and used for reading the pressure value of the pressure applying end, and the displacement reading component is arranged on the vertical beam, connected with the lifting assembly and used for reading the displacement of the pressure applying end;
the dropping liquid subassembly, including locating the dropping liquid support of one side of main frame vertically locates drip tube on the dropping liquid support, the drip tube is connected with water conservancy diversion mouth through the honeycomb duct, water conservancy diversion mouth is used for the guide liquid to the sample in the drip tube.
In a possible implementation mode, the upper end face of the bottom support is provided with a horizontal testing face, the cushion block is arranged on the testing face, a semicircular positioning ring is arranged on the testing face, the cushion block and the cover plate are round pieces, the diameters of the round pieces are the same as the inner circle diameter of the positioning ring, and the cushion block and the cover plate are respectively clamped and positioned in the inner circle of the positioning ring.
In one possible implementation, the cushion block and the cover plate are made of glass, and the test surface and the positioning ring are made of acid-resistant materials.
In a possible implementation mode, the lifting component comprises a lead screw which is longitudinally rotated and arranged on the vertical beam, a rotary hand wheel is installed at the bottom of the lead screw, the rotary hand wheel is meshed with the lead screw through a gear, a lifting block is sleeved on the lead screw and is rotationally arranged, a first fixing block of a pressure reading component is connected to the lifting block, a pressing end is connected to the lower portion of the pressure reading component, and a second fixing block of the displacement reading component is further arranged on the lifting block and is used for connecting the pressing end to the lower portion of the pressure reading component.
In a possible implementation mode, the pressure reading component is a digital display type pressure gauge, the digital display type pressure gauge is connected on the first fixed block, the pressure applying end is a pressure sensor of a disc shape, the diameter of the pressure sensor is the same as the inner circle diameter of the positioning ring, the pressure sensor is connected through a connecting rod below the digital display type pressure gauge, the displacement reading component is a digital display type vernier caliper, the digital display type vernier caliper is longitudinally connected on the vertical beam, and the sliding part of the digital display type vernier caliper is connected on the second fixed block.
In a possible implementation manner, the flow guide pipe is connected to the lower end of the dropping liquid pipe, the lower part of the dropping liquid pipe is provided with a regulating valve, and the flow guide nozzle is connected to the tail end of the flow guide pipe; the testing device is characterized in that a plastic self-sealing bag used for containing a test piece is arranged between the cover plate and the cushion block, the open end of the plastic self-sealing bag extends outwards from the open side of the semicircular positioning ring, and the flow guide nozzle extends into the open end of the plastic self-sealing bag to humidify the test piece.
The device for testing the wet resilience of the AGM separator under different compression amounts has the advantages that: compared with the prior art, the baffle test piece is placed in the centre gripping subassembly, is located between cushion and the cover plate, and the water conservancy diversion mouth leads the liquid in the dropping liquid pipe to the sample through the honeycomb duct, carries out humidification to the sample. Simultaneously, the lifting component drives the pressing end to move downwards, and the cover plate applies pressure to the test piece. The displacement reading component reads the displacement of the pressing end, so that the compression amount of the test piece is calculated, the pressure reading component reads the pressure value of the pressing end, and the wet resilience of the partition plate test piece under different compression amounts is calculated through the change of the compression amount and the change of the pressure of the test piece. The device for testing the wet resilience of the AGM separator under different compression amounts can accurately and quickly calculate the wet resilience of the AGM separator under different compression amounts, and can further understand and research the AGM separator.
The invention also provides a method for testing the wet resilience of the AGM separator under different compression amounts, and the device for testing the wet resilience of the AGM separator under different compression amounts comprises the following steps:
s1: cutting the AGM separator into circles, superposing a plurality of circular separators to prepare test pieces, preparing at least two groups of test pieces, drying a plurality of groups of test pieces at 105 +/-2 ℃ for more than 1 hour, taking out and cooling to room temperature;
s2: a pressure of 20kpa was applied to each of the sets of samples and the thickness of each set was recorded as Dn；
S3: taking a first group of samples, and taking the saturated acid absorption amount of the samples to be L under the X% compression amount according to a national standard medium-pressure acid absorption method;
s4: taking a second group of samples, placing the second group of samples between the cushion block and the cover plate, driving the pressure applying end to descend by the lifting assembly, applying pressure to the second group of samples by pressing the cover plate downwards, and reading the thickness of the second group of samples by the displacement reading component to reach DnContinuing to apply pressure and reading the thickness of the second set of samples by the displacement reading means to DDry matter，DDry matter＝DnX% and reading and recording the pressure value as F by a pressure reading meansDry matter(ii) a The density of the mixture is 1.285 +/-0.005 g/cm3(25 ℃) in a sulfuric acid solution, the amount of the sulfuric acid solution added being LY％Not less than L, reading and recording wet pressure F by pressure reading partWet；
S5: according to different values of Y, calculating the wet resilience of the partition plate: hY％＝(FDry matter/FWet)*100％。
In one possible implementation manner, in step S1, when the thickness of a single AGM separator is less than 1.5mm, 5 circular separators are stacked to prepare a test piece; and when the thickness of the single AGM separator is more than or equal to 1.5mm, overlapping 4 round separators to prepare a test piece.
In a possible implementation manner, in step S4, before recording the pressure value as F dry, the pressure value is kept still for 10min until the pressure is stabilized, and then the pressure value is read; and after adding the sulfuric acid solution, recording the wet pressure every 30s, controlling the acid adding time to be 15min, maintaining the pressure for 10min, reading and recording the wet pressure Fwet after the numerical value of the pressure reading component is stable.
The method for testing the wet resilience of the AGM separator under different compression amounts has the advantages that: compared with the prior art, after the samples are prepared and processed, the saturated acid absorption amount under X% compression is L by taking the first group as a standard sample, and F is obtained by taking other samples under the condition that Y values are differentDry matterAnd FWetFinally calculating the wet resilience of the separator. By using the method for testing the wet resilience of the AGM separator under different compression amounts, the aim of quickly measuring the wet resilience of the AGM separator under different compression amounts under different separator saturation degrees can be fulfilled, and the method is convenient and quick.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described 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 creative efforts.
FIG. 1 is a front view of an apparatus for testing the wet resilience of an AGM separator under different compression amounts according to an embodiment of the present invention;
FIG. 2 is a side view of an apparatus for testing the wet springback capability of an AGM separator under different compression amounts according to an embodiment of the present invention;
FIG. 3 is a transmission structure diagram of a screw rod and a rotary hand wheel provided by the embodiment of the invention;
FIG. 4 is a graph showing the values of 95% and 100% wet resilience of an AGM separator obtained by testing different samples using the method for testing wet resilience of an AGM separator under different compression amounts according to the present invention;
FIG. 5 is a wet pressure change curve of the AGM separator at 80% compression obtained by testing different samples by using the method for testing the wet resilience of the AGM separator at different compression amounts.
Description of reference numerals:
1.a bottom support; 2. erecting a beam; 3. testing the surface; 4. a positioning ring; 5. cushion blocks; 6. a cover sheet; 7.a screw rod; 8. rotating a hand wheel; 9. a lifting block; 10. a first fixed block; 11. a second fixed block; 12. a pressure sensor; 13. a connecting rod; 14. a digital display type pressure gauge; 15. a digital display type vernier caliper; 16. a drip stand; 17. a dropping tube; 18. a flow guide pipe; 19. a flow guide nozzle; 20. adjusting a valve; 21. a plastic self-sealing bag; 22. and (5) a foot pad.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to FIG. 1, an apparatus for testing the wet resilience of an AGM separator under different compression will now be described. The device for testing the wet resilience of the AGM partition under different compression amounts comprises a main frame, a clamping assembly, a lifting assembly, a data reading assembly and a liquid dropping assembly.
The main frame comprises a bottom support 1 and a vertical beam 2 arranged on the bottom support 1; the clamping assembly comprises a cushion block 5 arranged on the upper end surface of the base support 1 and a cover plate 6 arranged on the upper end surface of the cushion block 5, and the cover plate 6 is matched with the cushion block 5 to clamp the test piece; the lifting assembly is arranged on the vertical beam 2, a pressure applying end is connected to the lifting assembly, and the lifting assembly drives the pressure applying end to move downwards so as to apply pressure to the test piece through the cover plate 6; the data reading assembly comprises a pressure reading component and a displacement reading component, the pressure reading component is arranged on the lifting assembly and used for reading the pressure value of the pressure applying end, and the displacement reading component is arranged on the vertical beam 2, connected with the lifting assembly and used for reading the displacement of the pressure applying end; the dropping liquid subassembly is including locating the dropping liquid support 16 of one side of main frame and vertically locating the dropping liquid pipe 17 on the dropping liquid support 16, and dropping liquid pipe 17 is connected with water conservancy diversion mouth 19 through honeycomb duct 18, and water conservancy diversion mouth 19 is used for guiding liquid in dropping liquid pipe 17 to the sample.
Compared with the prior art, the device for testing the wet resilience of the AGM separator under different compression amounts has the advantages that a separator test piece is placed in the clamping assembly and positioned between the cushion block 5 and the cover plate 6, and the flow guide nozzle 19 guides liquid in the dropping liquid pipe 17 to the sample through the flow guide pipe 18 to humidify the sample. Simultaneously, the lifting component drives the pressing end to move downwards, and the cover plate 6 applies pressure to the test piece. The displacement reading component reads the displacement of the pressing end, so that the compression amount of the test piece is calculated, the pressure reading component reads the pressure value of the pressing end, and the wet resilience of the partition plate test piece under different compression amounts is calculated through the change of the compression amount and the change of the pressure of the test piece. The device for testing the wet resilience of the AGM separator under different compression amounts can accurately and quickly calculate the wet resilience of the AGM separator under different compression amounts, and can further understand and research the AGM separator.
In some embodiments, referring to fig. 1 and 2, the upper end surface of the base support 1 is provided with a horizontal testing surface 3, the cushion block 5 is arranged on the testing surface 3, the testing surface 3 is provided with a semicircular positioning ring 4, the cushion block 5 and the cover plate 6 are both circular pieces and have the same diameter as the diameter of the inner circle of the positioning ring 4, and the cushion block 5 and the cover plate 6 are respectively clamped and positioned in the inner circle of the positioning ring 4.
In particular, the bottom of the mounting 1 is provided with a plurality of feet 22 to ensure the stability of the whole device. The up end of collet 1 is equipped with the bottom plate, and the up end of bottom plate is located to test face 3, and test face 3 is in absolute horizontality. The cushion block 5 is arranged on the test surface 3, and a test piece placed on the cushion block 5 is ensured to be kept in a horizontal state.
Wherein, the positioning ring 4 is a semicircular structure and is fixed on the testing surface 3. When testing, cushion 5 and cover plate 6 just in time clamp the location in the interior circle of holding ring 4, can guarantee the stability of cushion 5 and cover plate 6, avoid the sample to appear the displacement on the horizontal direction and influence the accuracy of experimental numerical value.
Specifically, the cushion block 5 and the cover plate 6 are made of glass, and the test surface 3 and the positioning ring 4 are made of acid-resistant materials.
In some embodiments, referring to fig. 1 to 3, the lifting assembly includes a screw rod 7 longitudinally rotatably disposed on the vertical beam 2, a rotating hand wheel 8 is mounted at the bottom of the screw rod 7, the rotating hand wheel 8 is engaged with the screw rod 7 through a gear, a lifting block 9 is sleeved on the screw rod 7 and rotatably disposed thereon, a first fixing block 10 for connecting a pressure reading component is disposed on the lifting block 9, a pressure applying end is connected below the pressure reading component, and a second fixing block 11 for connecting a displacement reading component is further disposed on the lifting block 9.
Specifically, the top of the vertical beam 2 is connected with a transverse plate, the upper end of the screw rod 7 is vertically and rotatably connected with the transverse plate, and the lower end of the screw rod is vertically and rotatably connected with the bottom support 1. The rotary hand wheel 8 is arranged at the bottom of the vertical beam 2 and is transversely arranged, and a handle is arranged on a wheel disc of the rotary hand wheel 8, so that the rotary hand wheel can rotate conveniently. The screw rod 7 and the rotary hand wheel 8 are meshed through a vertical threaded bevel gear shaft and a horizontal bevel gear shaft, so that the screw rod 7 is driven to rotate by rotating the rotary hand wheel 8. The lifting block 9 is in running fit with the screw rod 7 and is limited by a slide way on the vertical beam 2 to form a screw rod transmission mechanism. The lifting block 9 can be lifted along the axial direction of the screw rod 7 by rotating the rotating hand wheel 8. So that the lifting block 9 is connected with the pressure reading component through the first fixing block 10 to drive the pressure applying end to complete the lifting action. In addition, the lifting block 9 is connected with the displacement reading component through the second fixed block 11, and the lifting of the lifting block 9 is consistent with the displacement of the pressure applying end, so that the lifting block 9 can drive the second fixed block 11 to lift, the displacement of the pressure applying end is read through the displacement reading component, and the compression amount of the test piece is calculated.
In some embodiments, referring to fig. 1 to 2, the pressure reading component is a digital display type pressure gauge 14, the digital display type pressure gauge 14 is connected to the first fixed block 10, the pressure applying end is a disc-shaped pressure sensor 12, the diameter of the pressure sensor 12 is the same as the diameter of the inner circle of the positioning ring 4, the pressure sensor 12 is connected below the digital display type pressure gauge 14 through a connecting rod 13, the displacement reading component is a digital display type vernier caliper 15, the digital display type vernier caliper 15 is longitudinally connected to the vertical beam 2, and the sliding part of the digital display type vernier caliper 15 is connected to the second fixed block 11.
Specifically, the pressure reading component is a digital display type pressure gauge 14, each control key such as a power-on/off switch and a memory key and a liquid crystal display screen are arranged on the digital display type pressure gauge 14, the liquid crystal display screen can clearly display real-time pressure, and reading is convenient. The displacement reading component is a digital display type vernier caliper 15, the digital display type vernier caliper 15 is provided with a zero setting function, the recording of the relative displacement and the absolute displacement of the displacement can be realized, the relative compression displacement and the absolute compression displacement of the test piece can be displayed, and the relative compression amount and the absolute compression amount of the test piece can be visualized. The sliding part of the digital display vernier caliper 15 is provided with a display screen, displacement can be achieved, a button corresponding to a zero setting function is arranged on the sliding part, and relative displacement and absolute displacement can be measured and calculated through zero setting operation on a specific position.
The pressure sensor 12 that the end of exerting pressure is the disc connects in the below of digital display pressure gauge 14 through connecting rod 13, and lifting unit drives the end of exerting pressure through digital display pressure gauge 14 and exerts pressure to the test piece to show pressure data often.
In some embodiments, referring to fig. 1, the guiding tube 18 is connected to the lower end of the dropping tube 17, the lower portion of the dropping tube 17 is provided with an adjusting valve 20, and the guiding nozzle 19 is connected to the end of the guiding tube 18; a plastic self-sealing bag 21 for containing the test piece is arranged between the cover plate 6 and the cushion block 5, the opening end of the plastic self-sealing bag 21 extends outwards from the opening side of the semicircular positioning ring 4, and the flow guide nozzle 19 extends into the opening end of the plastic self-sealing bag 21 so as to humidify the test piece.
Specifically, the dropping tube 17 is longitudinally mounted on the dropping bracket 16, and a regulating valve 20 is provided at a lower portion thereof, so that the amount of liquid delivered to the guide tube 18 from the dropping tube 17 is controlled by rotating the regulating valve 20. The flow guide tube 18 is a flexible hose, so that the flow guide nozzle 19 can be conveniently aligned to the test piece.
In addition, the test piece is at first placed in plastics valve bag 21 after, places again between cover plate 6 and cushion 5, and the open end of plastics valve bag 21 outwards extends to the outside from the opening side of semicircular holding ring 4, and water conservancy diversion mouth 19 stretches into the open end of plastics valve bag 21, conveniently adds the test piece with liquid, can avoid liquid leakage, improves the imbibition effect of test piece.
The invention also provides a method for testing the wet resilience of the AGM separator under different compression amounts, and the device for testing the wet resilience of the AGM separator under different compression amounts comprises the following steps:
s1: cutting the AGM separator into circles, superposing a plurality of circular separators to prepare test pieces, preparing at least two groups of test pieces, drying a plurality of groups of test pieces at 105 +/-2 ℃ for more than 1 hour, taking out and cooling to room temperature;
s2: a pressure of 20kpa was applied to each of the sets of samples and the thickness of each set was recorded as Dn；
S3: taking a first group of samples, and taking the saturated acid absorption amount of the samples to be L under the X% compression amount according to a national standard medium-pressure acid absorption method;
s4: taking a second group of samples, placing the second group of samples between the cushion block 5 and the cover plate 6, driving the pressure applying end to descend by the lifting assembly, applying pressure to the second group of samples by pressing the cover plate 6 downwards, and reading the thickness of the second group of samples by the displacement reading component to reach DnContinuing to apply pressure and reading the thickness of the second set of samples by the displacement reading means to DDry matter，DDry matter＝DnX% and reading and recording the pressure value as F by a pressure reading meansDry matter(ii) a The density of the mixture is 1.285 +/-0.005 g/cm3(25 ℃) in a sulfuric acid solution, the amount of the sulfuric acid solution added being LY％Not less than L, reading and recording wet pressure F by pressure reading partWet；
S5: according to different values of Y, calculating the wet resilience of the partition plate: hY％＝(FDry matter/FWet)*100％。
In some embodiments, in step S1, when the thickness of the single AGM separator is less than 1.5mm, 5 circular separators are stacked to prepare a test piece; and when the thickness of the single AGM separator is more than or equal to 1.5mm, overlapping 4 round separators to prepare a test piece.
In some embodiments, in step S4, a pressure value F is recordedDry matterFirstly, standing for 10min until the pressure is stable, and then reading; after adding sulfuric acid solution, recording wet pressure every 30s, controlling acid adding time at 15min, maintaining pressure for 10min, reading and recording wet pressure F after the value of the pressure reading component is stableWet。
Example 1:
cutting an AGM separator sample with the diameter phi of 60mm, wherein 5 pieces of the sample with the thickness smaller than 1.5mm are used as a group, 4 pieces of the sample with the thickness larger than or equal to 1.5mm are used as a group, and cutting 3 groups for later use; punching the grouped AGM separator samples, uniformly punching holes on the end faces of the whole samples, wherein the interval between adjacent holes is not more than 2mm, and the aperture is not more than 0.2 mm. When the hole is punctured, the AGM partition plate can be used for testing the wet resilience under different compression amounts, a plurality of groups of steel needles are uniformly arranged on the pressure applying end of the AGM partition plate, and the hole puncturing operation on the sample is completed by using the lifting assembly. Drying at 105 + -2 deg.C for more than 1 hr in a drying chamber, taking out to a cooling chamber, cooling to room temperature, and maintaining the cooling chamber at negative pressure;
respectively testing the thickness of the test sample under 20kpa of each group of partition boards, and recording the thickness of each group as D11, D12 and D13;
the saturated acid absorption of the separator at 80% compression was measured: testing the first group of samples according to a national standard medium-pressure acid absorption method, and measuring the saturated acid absorption L of the partition plate samples under 80% of compression;
taking a second group of clapboard samples, firstly putting the clapboard samples into a plastic self-sealing bag 21, then putting the clapboard samples on a cushion block 5 in a positioning ring 4, covering a cover plate 6, driving a pressure sensor 12 to move downwards by rotating a rotating handle to apply pressure to the AGM clapboard samples, reading the relative displacement of a digital display vernier caliper 15 to enable the thickness of the clapboard samples to be pressed to D12, displaying a pressure value by a digital display manometer 14, continuously rotating the rotating handle to apply pressure to the clapboard samples, reading the absolute displacement value of the digital display vernier caliper 15 to enable the thickness of the clapboard samples to be changed into D22, enabling D22 to be D12 × 80%, standing for about 10min until the pressure is stable, and recording the dry pressure to be F12;
testing the wet resilience of the separator at 95% saturation: the speed of the dropping liquid pipe 17 is adjusted by the adjusting valve 20, the flow guide nozzle 19 of the flow guide pipe 18 is close to the AGM separator sample, and the density of 1.285 +/-0.005 g/cm is uniformly added into the plastic self-sealing bag 213(25 ℃) in sulfuric acid, L is added95％Recording the wet pressure every 30s for 95% L of sulphuric acid solution; controlling the acid adding time to be about 15min, maintaining the pressure for 10min until the numerical value of the digital pressure gauge 14 tends to be stable, and recording the final wet pressure F22;
testing of the Wet rebound Capacity of the separator at 100% saturation: taking the third groupThe plate sample is subjected to dry state pressure F13 measured according to the steps, the speed of the dropping liquid pipe 17 is adjusted, the flow guide nozzle 19 of the flow guide pipe 18 is close to the AGM partition plate sample, and the plastic valve bag 21 is uniformly added with the mixture with the density of 1.285 +/-0.005 g/cm3(25 ℃) in sulfuric acid, L is added100％The amount of sulfuric acid solution is more than or equal to L, and the wet pressure is recorded every 30 s; controlling the acid adding time to be about 15min, maintaining the pressure for 10min until the value of the tensile machine tends to be stable, and recording the final wet pressure F33;
calculating the wet resilience of the partition plate:
separator 95% saturation wet resilience: h95％＝(F12/F22)×100％；
100% saturation wet resilience of separator: h100％＝(F13/F33)×100％。
Five groups of AGM separator plate samples from different manufacturers are taken, and the test method for testing the wet resilience of the AGM separator plate under different compression amounts is utilized for detection.
Referring to fig. 4, five groups of samples 1# -5# are tested in 95% wet state and 100% wet state, and the wet resilience values of the five groups of samples are detailed in the following table:
| 1# | 2# | 3# | 4# | 5# | |
| 95% wet state | 69.4％ | 71.4％ | 70.9％ | 72.1％ | 70.9％ |
| 100% wet state | 74.57％ | 77.3％ | 77.07％ | 85.02％ | 76.14％ |
Wherein, under 95% wet state, the resilience ability of the sample in wet state meeting the requirement is more than or equal to 70%; the required wet resilience of the sample is more than or equal to 75% under 100% wet state; it can be seen that, in the five groups of samples, the sample No. 1 is not satisfactory, and the sample No. 4 is the sample with the best performance and is selected preferentially.
Referring to fig. 5, the change curve of the wet pressure of five groups of samples under 80% compression is the least, more stable and most excellent in wet resilience performance during the detection process of the sample # 4.
By integrating the resilience of the AGM partition board in different wet states and the variation curve of the wet pressure, a sample with the optimal resilience in the wet state can be selected, and an instructive direction can be provided for selecting products of different manufacturers, so that the method has popularization significance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
- The device for testing the wet resilience of the AGM separator under different compression amounts is characterized by comprising:the main frame comprises a bottom support and a vertical beam arranged on the bottom support;the clamping assembly comprises a cushion block arranged on the upper end surface of the base support and a cover plate arranged on the upper end surface of the cushion block, and the cover plate is matched with the cushion block to clamp the test piece;the lifting assembly is arranged on the vertical beam and is connected with a pressure applying end, and the lifting assembly drives the pressure applying end to move downwards so as to apply pressure to the test piece through the cover plate;the data reading assembly comprises a pressure reading component and a displacement reading component, the pressure reading component is arranged on the lifting assembly and used for reading the pressure value of the pressure applying end, and the displacement reading component is arranged on the vertical beam, connected with the lifting assembly and used for reading the displacement of the pressure applying end;the dropping liquid subassembly, including locating the dropping liquid support of one side of main frame vertically locates drip tube on the dropping liquid support, the drip tube is connected with water conservancy diversion mouth through the honeycomb duct, water conservancy diversion mouth is used for the guide liquid to the sample in the drip tube.
- 2. The device for testing the wet resilience of an AGM separator plate according to claim 1, wherein the upper end surface of the base plate is provided with a horizontal testing surface, the cushion block is arranged on the testing surface, a semicircular positioning ring is arranged on the testing surface, the cushion block and the cover plate are both circular pieces and have the same diameter as the diameter of the inner circle of the positioning ring, and the cushion block and the cover plate are respectively clamped and positioned in the inner circle of the positioning ring.
- 3. The device for testing the wet resiliency of an AGM separator according to claim 2, wherein the spacer and the cover are made of glass, and the test surface and the retaining ring are made of acid-resistant material.
- 4. The device for testing the wet resilience of the AGM partition board according to claim 2, wherein the lifting assembly comprises a screw rod longitudinally rotatably arranged on the vertical beam, a rotating hand wheel is mounted at the bottom of the screw rod and engaged with the screw rod through a gear, a lifting block is sleeved on the screw rod and rotatably arranged on the screw rod, a first fixed block for connecting the pressure reading component is arranged on the lifting block, the pressing end is connected below the pressure reading component, and a second fixed block for connecting the displacement reading component is further arranged on the lifting block.
- 5. The device for testing the wet resilience of an AGM partition board according to claim 4, wherein the pressure reading member is a digital display type pressure gauge connected to the first fixing block, the pressure applying end is a disc-shaped pressure sensor having a diameter equal to the diameter of the inner circle of the positioning ring, the pressure sensor is connected below the digital display type pressure gauge through a connecting rod, the displacement reading member is a digital display type vernier caliper longitudinally connected to the vertical beam, and the sliding part of the digital display type vernier caliper is connected to the second fixing block.
- 6. The device for testing the wet resilience of an AGM separator according to claim 2, wherein the flow guide tube is connected to the lower end of the dropping liquid tube, the lower part of the dropping liquid tube is provided with the regulating valve, and the flow guide nozzle is connected to the end of the flow guide tube; the testing device is characterized in that a plastic self-sealing bag used for containing a test piece is arranged between the cover plate and the cushion block, the open end of the plastic self-sealing bag extends outwards from the open side of the semicircular positioning ring, and the flow guide nozzle extends into the open end of the plastic self-sealing bag to humidify the test piece.
- A method for testing the wet resilience of an AGM separator under different compression amounts, which comprises the following steps:s1: cutting the AGM separator into circles, superposing a plurality of circular separators to prepare test pieces, preparing at least two groups of test pieces, drying a plurality of groups of test pieces at 105 +/-2 ℃ for more than 1 hour, taking out and cooling to room temperature;s2: a pressure of 20kpa was applied to each of the sets of samples and the thickness of each set was recorded as Dn；S3: taking a first group of samples, and taking the saturated acid absorption amount of the samples to be L under the X% compression amount according to a national standard medium-pressure acid absorption method;s4: taking a second group of samples, placing the second group of samples between the cushion block and the cover plate, driving the pressure applying end to descend by the lifting assembly, applying pressure to the second group of samples by pressing the cover plate downwards, and reading the thickness of the second group of samples by the displacement reading component to reach DnContinuing to apply pressure and reading the thickness of the second set of samples by the displacement reading means to DDry matter，DDry matter＝DnX% and reading and recording the pressure value as F by a pressure reading meansDry matter(ii) a The density of the mixture is 1.285 +/-0.005 g/cm3(25 ℃) in a sulfuric acid solution, the amount of the sulfuric acid solution added being LY％Not less than L, reading and recording wet pressure F by pressure reading partWet；S5: according to different values of Y, calculating the wet resilience of the partition plate: hY％＝(FDry matter/FWet)*100％。
- 8. The method for testing the wet resilience of an AGM separator according to claim 7, wherein in step S1, when the thickness of a single AGM separator is less than 1.5mm, 5 round separators are stacked to prepare a test piece; and when the thickness of the single AGM separator is more than or equal to 1.5mm, overlapping 4 round separators to prepare a test piece.
- 9. The method for testing the wet springback capability of an AGM separator according to claim 7, wherein in step S4, a pressure value F is recordedDry matterFirstly, standing for 10min until the pressure is stable, and then reading; recording wet state pressure every 30s after adding sulfuric acid solution, controlling acid adding time at 15min, maintaining pressure for 10min, and waiting for pressure reading partAfter the value of (2) has stabilized, the wet pressure F is read and recordedWet。
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