CN215640707U - A measuring device for gas production rate of silicon-based anode slurry - Google Patents
A measuring device for gas production rate of silicon-based anode slurry Download PDFInfo
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- CN215640707U CN215640707U CN202122135272.0U CN202122135272U CN215640707U CN 215640707 U CN215640707 U CN 215640707U CN 202122135272 U CN202122135272 U CN 202122135272U CN 215640707 U CN215640707 U CN 215640707U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000010703 silicon Substances 0.000 title claims abstract description 39
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 239000006256 anode slurry Substances 0.000 title description 8
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000005303 weighing Methods 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 60
- 239000002985 plastic film Substances 0.000 claims description 15
- 229920006255 plastic film Polymers 0.000 claims description 15
- 239000011267 electrode slurry Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000001139 pH measurement Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000006257 cathode slurry Substances 0.000 abstract description 11
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000010405 anode material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- NCZAACDHEJVCBX-UHFFFAOYSA-N [Si]=O.[C] Chemical compound [Si]=O.[C] NCZAACDHEJVCBX-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 hydroxyl ions Chemical class 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000006138 lithiation reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The embodiment of the utility model relates to a device for measuring the gas production rate of silicon-based cathode slurry, which comprises: the device comprises a weighing platform, a container containing liquid, a lifting appliance, a containing bag containing silicon-based cathode slurry, a temperature control module for monitoring and adjusting the temperature of the liquid in the container and a data monitoring and processing module for calculating the gas production rate; the container is arranged above the weighing platform; the lifting appliance is arranged above the container; the containing bag is suspended by a hanger and is immersed in the liquid in the container; the temperature control module comprises a temperature measuring part and a temperature adjusting component; the temperature adjusting component is arranged outside the container; the temperature measuring piece extends into the liquid in the container; the data monitoring processing module is electrically connected with the weighing platform. The device for measuring the gas production rate of the silicon-based cathode slurry improves the measurement sensitivity.
Description
Technical Field
The utility model relates to the technical field of battery material detection, in particular to a device for measuring the gas production rate of silicon-based negative electrode slurry.
Background
High capacity silicon-based anode materials have been successfully used in commercial applications, such as nano silicon carbon anode materials and silicon monoxide carbon anode materials. With the development of high-capacity silicon-based negative electrode materials, means such as surface modification and element doping are widely used for improving material performance, and especially, the pre-lithiation technology is more remarkable in improving the first effect and the energy density of a battery. However, surface modification and element doping techniques are often accompanied by unstable factors, such as surface alkalinity and incomplete coating, which result in exposure of nano-silicon and gas generation due to reaction of hydroxyl ions. In the prior art, the gas production rate of the silicon electrode material is mostly measured by calculating the weight difference before and after gas production, and the change of the gas production rate in the gas production process cannot be inspected, so that the reaction intensity of the silicon electrode material slurry at a certain moment cannot be judged.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a device for measuring the gas production rate of silicon-based cathode slurry, which can monitor the gas production rate of the silicon-based cathode slurry in real time, improve the measurement sensitivity, further disclose the gas production mechanism and make effective measures for inhibiting the gas production reaction.
In view of the above, the present invention provides a device for measuring a gas generation rate of a silicon-based anode slurry, the device comprising: the device comprises a weighing platform, a container containing liquid, a lifting appliance, a containing bag containing silicon-based cathode slurry, a temperature control module for monitoring and adjusting the temperature of the liquid in the container and a data monitoring and processing module for calculating the gas production rate;
the container is arranged above the weighing platform;
the spreader is disposed above the container;
the containing bag is suspended by the hanger and is immersed in the liquid of the container;
the temperature control module comprises a temperature measuring part and a temperature adjusting component; the temperature regulating assembly is arranged outside the container; the temperature measuring piece extends into the liquid in the container;
the data monitoring and processing module is electrically connected with the weighing platform.
Preferably, the temperature adjustment assembly includes: the water circulation device comprises a circulating water pipe, a water supply unit and a control unit;
the circulating water pipe is surrounded on the outer side of the container;
the water supply unit is connected with the circulating water pipe;
the control unit is respectively connected with the temperature measuring part and the water supply unit.
Further preferably, the circulating water pipe comprises a water inlet and a water outlet; the water inlet is connected with the water supply unit.
Still further preferably, when the circulating water pipe is spiral, the water inlet is arranged at the lower end of the circulating water pipe; the water outlet is arranged at the upper end of the circulating water pipe;
when the circulating water pipe is a plurality of annular pipes arranged in parallel, the water inlet and the water outlet are respectively arranged at two ends of each annular pipe.
Preferably, the measuring device further comprises a pH measuring module;
the pH measuring module is positioned on the weighing platform, and a probe of the pH measuring module is immersed in the containing bag.
Preferably, the measuring device further comprises a platform and a fixing rod;
the platform is arranged below the weighing platform;
the fixed rod is positioned on one side of the platform and comprises a vertical rod, a first extension rod, a second extension rod and a third extension rod, wherein the first extension rod is arranged on the vertical rod and used for fixing the lifting appliance, the second extension rod is used for fixing the temperature measuring part, and the third extension rod is used for fixing the temperature adjusting component.
Further preferably, the vertical rod is arranged perpendicular to the platform; the first extension bar, the second extension bar and the third extension bar are arranged in parallel to the platform.
Preferably, the detection head of the temperature measuring piece is positioned 1/2-2/3 below the liquid level of the container; the hanger is a flexible wire.
Preferably, the distance from the bottom end of the spreader to the liquid level of the container is no less than 1/3.
Preferably, the containing bag comprises an aluminum-plastic film package and an air bag; the air bag is communicated with the aluminum-plastic film package.
Compared with the prior art, the method has the following beneficial effects:
according to the device for measuring the gas production rate of the silicon-based negative electrode slurry, the weighing platform is adopted, the tension does not need to be measured, and the measurement sensitivity is improved; in addition, this application is still through setting up temperature control module, can real-time measurement temperature and adjust, has solved the liquid temperature's in the container that silicon-based negative pole thick liquids are brought because of the exothermic change of producing gas to lead to arousing the inaccurate problem of data measurement that buoyancy change brought after the liquid density change.
Drawings
Fig. 1 is a schematic structural diagram of a device for measuring a gas production rate of a silicon-based anode slurry according to an embodiment of the present invention;
fig. 2 is a partial structural cross-sectional view of a device for measuring a gas production rate of a silicon-based anode slurry according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following embodiments. The following examples are merely illustrative and explanatory of the present invention and should not be construed as limiting the scope of the utility model. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The test methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are commercially available.
Fig. 1 is a schematic structural diagram of a device for measuring a gas production rate of a silicon-based anode slurry according to an embodiment of the present invention; fig. 2 is a partial structural cross-sectional view of a device for measuring a gas production rate of a silicon-based anode slurry according to an embodiment of the present invention. With reference to fig. 1 and fig. 2, the present invention provides a device for measuring gas production rate of silicon-based negative electrode slurry, including: the device comprises a platform 1, a fixed rod 2, a lifting appliance 3, a weighing platform 4, a container 5, a containing bag 6, a temperature control module 7, a pH measuring module 8 and a data monitoring and processing module 9.
The platform 1 is the supporting and fixing structure of the measuring device.
The fixing rod 2 is arranged at one side of the platform 1. The fixing lever 2 includes: a vertical rod 20, a first extension rod 21, a second extension rod 22 and a third extension rod 23. The first extension bar 21, the second extension bar 22 and the third extension bar 23 are arranged on the vertical bar 20 in sequence from top to bottom. As an alternative, the vertical bars 20 are arranged perpendicular to the platform 1. The first, second and third projecting bars 21, 22, 23 are arranged parallel to the platform 1.
The spreader 3 is fixed to the first projecting bar 21. In an alternative, the spreader 3 may be a flexible wire. The bottom end of the spreader 3 is at a distance from the liquid level of the container 5 of not less than 1/3, the purpose of which is to allow the bag 6 to be completely submerged below the liquid level.
The weighing station 4 is a weight measuring module of the measuring device. The weighing station 4 is arranged above the platform 1. The weighing station 4 may be embodied as a high-precision high-sensitivity balance.
The container 5 contains liquid which can provide buoyancy conditions for the reaction of the silicon-based anode slurry. In fig. 1 and 2, the liquid level of the liquid is shown by a dotted line.
The containing bag 6 is a space for reaction of the silicon-based cathode slurry, and the volume of the containing bag can be changed. In a preferred embodiment, the bag 6 comprises an aluminum-plastic film package 61 and an air bag 62. The aluminum-plastic film package 61 is mainly used for containing silicon-based negative electrode slurry. The air bag 62 is communicated with the aluminum-plastic film package 61, when the silicon-based negative electrode slurry in the aluminum-plastic film package 61 reacts to generate gas, the gas can enter the air bag 62, and the phenomenon that the slurry leaks out due to volume expansion and breakage of the aluminum-plastic film package 61 is avoided.
The temperature control module 7 comprises a temperature measuring member 71 and a temperature adjusting assembly 72.
The temperature measuring member 71 may be a thermometer. The temperature measuring element 71 projects into the liquid in the container 5, the temperature measuring element 71 preferably being inserted vertically into the liquid. In order to ensure the accuracy of temperature measurement, the temperature measuring part 71 is suspended and fixed by the second extension bar 22. In a preferred example, the detection head of the temperature measuring part 71 is located 1/2-2/3 below the liquid level of the container 5.
The temperature adjusting component 72 can provide a constant temperature condition for the reaction of the silicon-based cathode slurry, and the phenomenon that the density of liquid in the container 5 is changed due to the change of temperature in the gas production process, so that the buoyancy and the gravity are changed, and the measurement is inaccurate is avoided. The temperature regulating assembly 72 is disposed outside the container 5.
The temperature adjustment assembly 72 may specifically include: a circulating water pipe 721, a water supply unit 722, and a control unit 723.
The circulating water pipe 721 is wound around the outside of the container 5 and fixed by the third protruding rod 23. The circulation water pipe 721 includes a water inlet and a water outlet. The water inlet is connected with a water supply unit 722. The circulating water pipe 721 may include, but is not limited to, the following two:
in the mode a, when the circulating water pipe 721 is spiral, the water inlet is arranged at the lower end of the circulating water pipe 721; the water outlet is provided at the upper end of the circulation water pipe 721.
Mode B, when the water circulation pipe 721 is a plurality of annular pipes arranged in parallel, the water inlet and the water outlet are respectively provided at both ends of each annular pipe.
The control unit 723 is connected with the temperature measuring part 71 and the water supply unit 722 respectively, can read the measured value of the temperature measuring part 71 in real time, and can indirectly adjust the temperature of the liquid in the container 5 by controlling the temperature of the water supply unit 722, thereby avoiding the error of data measurement caused by the change of the liquid temperature in the reaction process and improving the measurement precision.
The pH measuring module 8 is used for detecting the change of pH in the gas production process of the silicon-based negative electrode slurry. The pH measuring module 8 is positioned on the weighing platform 4, and the probe of the pH measuring module 8 is immersed in the containing bag 6.
The data monitoring and processing module 9 can record and calculate the measurement data of the silicon-based negative electrode slurry in the gas production process to obtain the gas production rate. The data monitoring and processing module 9 is respectively and electrically connected with the weighing platform 4 and the pH measuring module 8.
The components of the device for measuring the gas production rate of the silicon-based anode slurry and the connection relationship among the components are described above, and the use principle of the device is described below.
(1) The water supply unit 722, the control unit 723 and the temperature measuring member 71 are turned on. A preset temperature, for example 25 ℃, is set by the control unit 723;
(2) filling the container 5 with a liquid, such as water or ethanol, etc., and opening the pH measuring module 8 and the weighing station 4;
(3) opening the data monitoring processing module 9;
(4) filling the silicon-based negative electrode slurry to be tested into the aluminum-plastic film package 61 of the containing bag 6, and exhausting the gas in the air bag 62;
(5) fixing the bottom end of the hanger 3 on the containing bag 6, and placing the containing bag 6 below the liquid level of the container 5;
(6) the data monitoring and processing module 9 records the measurement data of the pH value measurement module 8 and the weighing platform 4 and draws a pH value-time curve and a gas production rate-time curve;
calculating the gas production Vx according to formula (I):
Vx＝(mx2-mx1)*g/ρT… … … … formula (I)
Calculating the gas production rate according to formula (II):
kv＝d(Vx2-Vx1)/d(t2-t1) … … … … formula (II)
Wherein Vx is the silicon-based negative electrode slurry at delta t (t)2-t1) Gas production over time;
mx1is t1The weight of the aluminum-plastic film package 61 filled with the silicon-based cathode slurry completely immersed in the liquid is read by the weighing platform 4;
mx2is t2The weight of the aluminum-plastic film package 61 filled with the silicon-based cathode slurry at the moment when the aluminum-plastic film package is completely immersed in the liquid is read by the weighing platform 4;
Vx1is t1The volume of the aluminum plastic film package 61 filled with the silicon-based cathode slurry completely immersed in the liquid at the moment;
Vx2is t2The volume of the aluminum-plastic film package 61 filled with the silicon-based negative electrode slurry when the film package is completely immersed in the liquid at that time;
ρTis the density of the liquid in the container 5 at a temperature T, T being a preset temperature;
the relationship between the gas production rate and the pH value in a certain time period can be obtained from the pH value-time curve and the gas production rate-time curve.
According to the device for measuring the gas production rate of the silicon-based negative electrode slurry, the weighing platform is adopted, the tension does not need to be measured, and the measurement sensitivity is improved; in addition, this application is still through setting up temperature control module, can real-time measurement temperature and adjust, has solved the liquid temperature's in the container that silicon-based negative pole thick liquids are brought because of the exothermic change of producing gas to lead to arousing the inaccurate problem of data measurement that buoyancy change brought after the liquid density change.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122135272.0U CN215640707U (en) | 2021-09-06 | 2021-09-06 | A measuring device for gas production rate of silicon-based anode slurry |
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| CN202122135272.0U CN215640707U (en) | 2021-09-06 | 2021-09-06 | A measuring device for gas production rate of silicon-based anode slurry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110130A (en) * | 2023-10-23 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Method for testing coating integrity of silicon-based material |
| CN117969342A (en) * | 2024-01-16 | 2024-05-03 | 常州硅源新能材料有限公司 | Testing device and testing method for measuring gas volume by using hanging rod |
-
2021
- 2021-09-06 CN CN202122135272.0U patent/CN215640707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117110130A (en) * | 2023-10-23 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Method for testing coating integrity of silicon-based material |
| CN117969342A (en) * | 2024-01-16 | 2024-05-03 | 常州硅源新能材料有限公司 | Testing device and testing method for measuring gas volume by using hanging rod |
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Effective date of registration: 20231229 Address after: No. 1, Zhongguancun Avenue, Kunlun Street, Liyang City, Changzhou City, Jiangsu Province, 213300 Patentee after: Yangtze River Delta Physics Research Center Co.,Ltd. Address before: 100190 No. 8, South Third Street, Haidian District, Beijing, Zhongguancun Patentee before: INSTITUTE OF PHYSICS, CHINESE ACADEMY OF SCIENCES |
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Effective date of registration: 20240708 Address after: 213300 room 228, 29 Chuangzhi Road, Kunlun Street, Liyang City, Changzhou City, Jiangsu Province Patentee after: TIANMU LAKE INSTITUTE OF ADVANCED ENERGY STORAGE TECHNOLOGIES Co.,Ltd. Country or region after: China Address before: No. 1, Zhongguancun Avenue, Kunlun Street, Liyang City, Changzhou City, Jiangsu Province, 213300 Patentee before: Yangtze River Delta Physics Research Center Co.,Ltd. Country or region before: China |