阅读说明：本技术 一种评测浆料流动性的装置及其测试方法 (Device for evaluating slurry fluidity and testing method thereof ) 是由 王增森 葛科 蒋倩 王化胜 于 2021-08-30 设计创作，主要内容包括：本发明涉及一种评测浆料流动性的装置及其测试方法,属于新能源锂电池浆料的技术领域。它通过浆料槽储存初始浆料,并在浆料槽底部设置有浆料槽出口,通过浆料槽上插入式设置的浆料槽隔板控制浆料槽出口的开闭；浆料通过下方倾斜设置的浆料通道流出,最后通过测试终止线时,被感应光束感应后完成计时。本发明的一种评测浆料流动性的装置及其测试方法,结构合理,测试成本低,测试中人为因素少,数据可靠。(The invention relates to a device for evaluating the fluidity of slurry and a testing method thereof, belonging to the technical field of new energy lithium battery slurry. The slurry tank stores initial slurry, a slurry tank outlet is formed in the bottom of the slurry tank, and the opening and closing of the slurry tank outlet are controlled through a slurry tank partition plate arranged on the slurry tank in an inserted mode; the thick liquids flow through the thick liquids passageway of below slope setting, when passing through the test termination line at last, accomplish the timing after being responded to by the response light beam. The device for evaluating the fluidity of the slurry and the testing method thereof have the advantages of reasonable structure, low testing cost, few human factors in testing and reliable data.)

1. An apparatus for evaluating fluidity of slurry, characterized in that: the base (1) is of a right-angle bending base structure and comprises a bottom plate and a vertical plate; the top of the vertical plate is provided with a slurry tank (3) in a matching way, the bottom of the slurry tank (3) is provided with a slurry tank outlet (13), and the opening and closing of the slurry tank outlet (13) are controlled by a slurry tank partition plate (4) arranged on the slurry tank (3) in an inserted way;

a slurry channel (5) is obliquely arranged below the slurry channel outlet (13), one end of the slurry channel (5) is arranged on a clamping groove (9) of a vertical plate of the base (1), and the other end of the slurry channel is connected with a slurry pool;

a test termination line (7) is arranged between the slurry channel (5) and the slurry pool, an optical sensor (8) is arranged on a horizontal extension line of the test termination line (7), and an induction light beam of the optical sensor (8) is matched with the test termination line (7);

the bottom of the slurry pool is provided with a slurry pool flow port (10), and the opening and closing of the slurry pool flow port (10) are controlled by a slurry pool partition plate (11) arranged at one side of the slurry pool in an inserting manner;

and a timer (12) is arranged on the other side of the slurry tank, and the timer (12) is connected with the optical sensor (8) through a lead.

2. The apparatus for evaluating the fluidity of the slurry according to claim 1, wherein: a handle (2) is further arranged on one side of the vertical plate of the base (1);

and reinforcing ribs (14) are arranged between the bottom plate and the vertical plate of the base (1).

3. The apparatus for evaluating the fluidity of the slurry according to claim 1, wherein: and an aluminum foil layer (6) is laid on the upper surface of the slurry channel (5).

4. The apparatus for evaluating the fluidity of the slurry according to claim 1, wherein: screens groove (9) have a plurality ofly, a plurality of screens grooves along vertical direction equipartition on the riser of base (1).

5. A test method for evaluating the fluidity of slurry is characterized in that:

the method comprises the following steps:

the method comprises the following steps: the base (1) of the device is placed on a horizontal plane, and a vertical plate is ensured to be vertical to the horizontal plane;

step two: selecting a slurry channel (5) with a proper length according to the included angle degree formed by the required flow channel and the horizontal plane, wherein one end of the slurry channel is clamped in a clamping groove (9) of the vertical plate, and the other end of the slurry channel is connected with the slurry pool;

step three: a slurry tank partition plate (4) is inserted into the slurry tank (3), a slurry pool partition plate (11) is inserted into the slurry pool, an aluminum foil layer (6) is laid in the slurry channel (5), and after the timer (12) is confirmed to return to zero, the slurry is added into the slurry tank (3);

step four: opening a separator (4) of the slurry tank and simultaneously opening a timer (12) for timing, wherein the slurry flows down along a slurry channel (5), and whether the flow rate of the slurry is uniform or not is observed;

step five: when the flowing slurry touches the test termination line (7), the sensing light beam of the optical sensor (8) is shielded, the sensing signal is transmitted to the timer (12) through the lead, and the timer (12) finishes timing and records;

step six: opening a slurry pool partition plate (11) in a slurry pool material flowing port (10), allowing slurry to flow out, and replacing the aluminum foil layer (6);

step seven: repeating the operation of the first step to the sixth step for multiple times to obtain the flowing time range and the average time of the slurry under the viscosity;

step eight: adding different kinds of slurry with the same viscosity as that in the third step, and repeating the operation of the first step to the seventh step;

step nine: accumulating test data, and obtaining different flowing time ranges and average time data according to the same viscosity and different types of slurry under the same slide angle;

step ten: and analyzing results, and comparing the flowability of different types of slurry flow time according to the time length of the test result.

6. The test method for evaluating the fluidity of a slurry according to claim 5, wherein: the viscosity range of the slurry added into the slurry tank (3) in the third step is 3000-15000 Pa.s.

Technical Field

The invention relates to a device for evaluating the fluidity of slurry and a testing method thereof, belonging to the technical field of new energy lithium battery slurry.

Background

In the prior art, in the manufacture of electrodes of lithium ion batteries, positive electrode slurry comprises a binder, a conductive agent, a positive electrode material and the like, and negative electrode slurry comprises a binder, graphite carbon powder and the like. The preparation of the positive electrode slurry and the negative electrode slurry comprises a series of processes of mixing, dissolving, dispersing and the like between liquid and between liquid and solid materials, and the processes are accompanied by changes of temperature, viscosity, environment and the like. In the positive electrode slurry and the negative electrode slurry, the slurry fluidity is crucial in the production of the lithium ion battery, and the quality of the slurry fluidity directly influences the quality of the subsequent lithium ion battery production and the performance of the product thereof.

The lithium ion battery slurry is composed of a plurality of raw materials with different specific gravities and different particle sizes, and is formed by mixing and dispersing solid and liquid phases, and belongs to non-Newtonian fluid. The lithium ion battery slurry is an oily flowing liquid, so the lithium ion battery slurry has the characteristics of common fluids such as viscosity, fluidity and the like, the slurry fluidity can influence the coated surface density, and further influence the compaction density and the cell performance of a pole piece, and no clear method or instrument is used for evaluating the slurry fluidity at present. The current test method: the sizing agent with certain volume or weight flows to a weighing instrument at the bottom after being filtered by a screen, and when the sizing agent at the upper part completely flows out or the weighed sizing agent is consistent with the original weight of the sizing agent, the time for the sizing agent to completely flow out is counted. The method has certain defects that slurry passes through the screen and is left on the screen, the weight of the slurry flowing downwards is smaller than the original weight, the time for terminating the test cannot be determined, the amount of the slurry left on the screen is different according to the flowability of the slurry, and the error is larger.

For example, chinese patent with patent publication No. CN113075087A discloses an electrode slurry performance testing device in the technical field of lithium ion battery slurry, and the above patent also relates to an electrode slurry performance testing method, wherein one side of a trough of the electrode slurry performance testing device is movably sleeved in an opening of a column i through a rod member i, the other side of the trough is movably sleeved in an opening of a column ii through a rod member ii, a threaded part at the outer end of the rod member ii is screwed with an adjusting shaft, the front part of the trough is provided with a plurality of flow guide pipes, and the rear part of the trough is provided with a trough rear cover.

The electrode slurry performance testing device and the testing method thereof can simultaneously measure the fluidity and the stability of the electrode slurry; but the pressure is given to the material groove by a pneumatic pump, so that the slurry flows out of different flow guide pipes, and the extrusion amount of one minute is collected for many times so as to calculate the fluidity; the device has the advantages of complex structure, more required equipment, high cost and long test time.

Therefore, in order to solve the above-mentioned background problems, it is urgent to develop a device for evaluating fluidity of slurry and a testing method thereof.

Disclosure of Invention

The invention aims to solve the problems in the background and provides a device for evaluating the fluidity of slurry and a test method thereof, which have the advantages of reasonable structure, low test cost, less artificial factors in the test and more reliable data.

The purpose of the invention is realized as follows: a device for evaluating the fluidity of slurry comprises a base, wherein the base is of a right-angle bending base structure and comprises a bottom plate and a vertical plate; the top of the vertical plate is provided with a slurry tank in a matching way, the bottom of the slurry tank is provided with a slurry tank outlet, and the opening and closing of the slurry tank outlet are controlled by a slurry tank partition plate arranged on the slurry tank in an inserted way;

a slurry channel is obliquely arranged below the outlet of the slurry tank, one end of the slurry channel is arranged on a clamping groove of a vertical plate of the base, and the other end of the slurry channel is connected with the slurry tank;

a test termination line is arranged between the slurry channel and the slurry pool, an optical sensor is arranged on a horizontal extension line of the test termination line, and an induction light beam of the optical sensor is matched with the test termination line;

the bottom of the slurry pool is provided with a slurry pool flow port, and the opening and closing of the slurry pool flow port are controlled by a slurry pool partition plate arranged on one side of the slurry pool in an inserting manner;

and a timer is arranged on the other side of the slurry tank and is connected with the optical sensor through a lead.

A handle is further arranged on one side of the vertical plate of the base;

and reinforcing ribs are arranged between the bottom plate and the vertical plate of the base.

And an aluminum foil layer is laid on the upper surface of the slurry channel.

The screens groove has a plurality ofly, and a plurality of screens grooves are along vertical direction equipartition on the riser of base.

A test method for evaluating the fluidity of a slurry, comprising the steps of:

the method comprises the following steps: placing a base of the device on a horizontal plane to ensure that a vertical plate is vertical to the horizontal plane;

step two: selecting a slurry channel with a proper length according to the degree of an included angle formed between the required flow channel and the horizontal plane, wherein one end of the slurry channel is clamped in the clamping groove of the vertical plate, and the other end of the slurry channel is connected with the slurry pool;

step three: inserting a pulp tank clapboard into the pulp tank, laying an aluminum foil layer in the pulp channel, and adding the pulp into the pulp tank after confirming that the timer returns to zero;

step four: opening a timer for timing while opening a separation plate of the slurry tank, enabling the slurry to flow down along the slurry channel, and observing whether the flow rate of the slurry is uniform;

step five: when the flowing slurry touches the test termination line, the sensing light beam of the optical sensor is shielded, the sensing signal is transmitted to the timer through the lead, and the timer completes timing and records;

step six: and opening a slurry tank partition plate in the slurry tank flow port, and allowing the slurry to flow out.

Step seven: repeating the operation of the first step to the sixth step for multiple times to obtain the flowing time range of the slurry under the viscosity;

step eight: adding different kinds of slurry with the same viscosity as that in the third step, and repeating the operation of the first step to the seventh step;

step nine: accumulating test data, and obtaining different flowing time ranges and average time data according to the same viscosity and different types of slurry under the same slide angle;

step ten: and analyzing results, and comparing the flowability of different types of slurry flow time according to the time length of the test result.

The viscosity of the slurry added into the slurry tank in the third step is in the range of 3000-15000 Pa.s.

Compared with the prior art, the invention has the following advantages:

the device and the method for evaluating the fluidity of the slurry can effectively quantify and evaluate the fluidity of the slurry and provide data support for evaluating the performance of the slurry; meanwhile, the testing process is simple in steps, strong in practicability, less in interference of human factors and reliable in data; the aluminum foil layer is arranged on the surface of the flow channel, so that the flowability of the slurry on the foil can be further simulated, and the flow channel is more authentic;

according to the device for evaluating the fluidity of the slurry, the slurry flow channel is integrally visually designed, the fluidity of the slurry can be visually and preliminarily judged according to the state of the slurry flowing down in the flow channel, if the advancing speeds of the slurry in the flow channel with uniform slurry are basically consistent, the fluidity of the slurry is basically good, and if the advancing speeds of the slurry are not uniform, the middle is fast, the two sides are slow, and the poor fluidity is further explained; after test data are accumulated, due to the fact that the flowability of the slurries with the same viscosity and different types is different, comparison of the slurries with the same viscosity and different types corresponding to different flowing time ranges under the same slide angle can be set through a limited experiment and used for comparing and judging the flowability of the slurries under the condition of testing univariates;

meanwhile, according to the device for evaluating the flowability of the slurry, the clamping grooves are uniformly distributed on the vertical plate of the base along the vertical direction, different slide ways can be selected to connect the clamping grooves and the clamping pools, and the angles of the slide ways are different; the fluidity of different types of slurry is compared for a plurality of times through different angles, and the data is more persuasive.

Drawings

Fig. 1 is a schematic overall structure diagram of an apparatus for evaluating slurry fluidity according to the present invention.

Fig. 2 is a bottom view of a flow port of an apparatus for evaluating fluidity of slurry according to the present invention.

Fig. 3 is a side view of the outlet of the slurry tank of an apparatus for evaluating the fluidity of slurry according to the present invention.

Wherein: 1. a base; 2. a handle; 3. a slurry tank; 4. a slurry tank partition plate; 5. a slurry passage; 6. an aluminum foil layer; 7. testing the termination line; 8. an optical sensor; 9. a clamping groove; 10. a material flowing port of the slurry pool; 11. a slurry tank partition; 12. a timer; 13. an outlet of the slurry tank; 14. and (5) reinforcing ribs.

Detailed Description

The invention is described below with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 3, in the embodiment, the apparatus for evaluating the fluidity of the slurry includes a base 1, wherein the base 1 is a right-angle bent base structure including a bottom plate and a vertical plate; the top of the vertical plate is provided with a slurry tank 3 in a matching way, the bottom of the slurry tank 3 is provided with a slurry tank outlet 13, and the opening and closing of the slurry tank outlet 13 are controlled by a slurry tank partition plate 4 arranged on the slurry tank 3 in an inserted way;

a slurry channel 5 is obliquely arranged below the outlet 13 of the slurry tank, one end of the slurry channel 5 is arranged on a clamping groove 9 of a vertical plate of the base 1, and the other end of the slurry channel is connected with the slurry tank;

a test termination line 7 is arranged between the slurry channel 5 and the slurry tank, an optical sensor 8 is arranged on a horizontal extension line of the test termination line 7, and an induction light beam of the optical sensor 8 is matched with the test termination line 7;

the bottom of the slurry pool is provided with a slurry pool material flowing port 10, and the opening and closing of the slurry pool material flowing port 10 are controlled by a slurry pool partition plate 11 arranged on one side of the slurry pool in an inserting manner;

and a timer 12 is arranged on the other side of the slurry tank, and the timer 12 is connected with the optical sensor 8 through a lead.

A handle 2 is further arranged on one side of the vertical plate of the base 1;

and reinforcing ribs 14 are arranged between the bottom plate and the vertical plate of the base 1.

An aluminum foil layer 6 is laid on the upper surface of the slurry channel 5.

The screens groove 9 has a plurality ofly, and a plurality of screens grooves are along vertical direction equipartition on the riser of base 1.

Example 1

Firstly, adopting lithium iron phosphate slurry, wherein the anode of the lithium iron phosphate slurry is German nano DY-1 slurry, and preparing 500g of anode slurry with the viscosity of 8352 Pa.s:

in this example, the following test method was employed:

the method comprises the following steps: the base 1 of the device is placed on a horizontal plane, and a vertical plate is ensured to be vertical to the horizontal plane;

step two: selecting a slurry channel 5, clamping one end of the slurry channel in a clamping groove 9 of a vertical plate, connecting the other end of the slurry channel with a slurry pool, and forming a slideway angle of 30 degrees between the slurry channel 5 and a horizontal plane;

step three: inserting a pulp tank partition plate 4 arranged on a pulp tank 3, inserting a pulp tank partition plate 11 into a pulp tank, laying an aluminum foil layer 6 in a pulp channel 5, and adding the pulp into the pulp tank 3 after confirming that a timer 12 returns to zero;

step four: opening a timer 12 to time while opening a separation plate 4 of the slurry tank, enabling the slurry to flow down along a slurry channel 5, and simultaneously observing whether the flow rate of the slurry is uniform;

step five: when the flowing-down slurry touches the test termination line 7, the sensing light beam of the optical sensor 8 is shielded, the sensing signal is transmitted to the timer 12 through the lead, the timer 12 finishes timing, and the time is recorded as 16.2 seconds;

step six: opening a slurry pool partition plate 11 in a slurry pool material flowing port 10, and allowing slurry to flow out;

step seven: repeating the operation of the first step to the sixth step for multiple times to obtain German nano DY-1 slurry under the condition that the viscosity is 8352Pa.s, wherein the time range of reaching the test termination line 7 when the included angle between the slide way and the horizontal plane is 30 degrees is 15.8 seconds to 16.9 seconds, and the average time is 16.4 seconds;

step eight: then, adding 500g of fibrate S13 anode slurry with the same viscosity of 8352Pa.s into the fibrate S13 anode slurry, and repeating the operation of the first step to the seventh step;

step nine: accumulating test data, and testing fibrate S13 anode slurry with the same viscosity of 8352Pa.s, wherein due to different types and different flowability of the slurry, the flowing time range is 17.1-17.9 seconds when the included angle between the slide way and the horizontal plane is 30 degrees, and the average time is 17.5 seconds;

step ten: and analyzing results, and comparing the German nano DY-1 slurry and the fenofibrate S13 positive slurry under the same viscosity at the same slide angle in different flow time ranges and average using time according to the test results to obtain the flow quality comparison.

According to the analysis of the results, in the embodiment, when the corresponding viscosity of the German nanometer DY-1 slurry is 8352Pa.s, and the included angle between the slideway and the horizontal plane is 30 degrees, the corresponding flowing time range is 15.8 seconds to 16.9 seconds, and the average time is 16.4 seconds; the fibrate-resorcinol S13 positive slurry with the viscosity of 8352Pa.s has a corresponding flowing time range of 17.1-17.9 seconds and an average time of 17.5 seconds when the included angle between the slide way and the horizontal plane is 30 degrees;

therefore, it was concluded that the flow of German nanometer DY-1 slurry was superior to the fibrate S13 slurry at a viscosity of 8352 Pa.s.

The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.