Testing device based on water content of battery slurry

Abstract

The utility model relates to the technical field of battery production, in particular to a testing device based on the moisture content of battery slurry, comprising: a reaction tank; a moisture meter; a cavity is formed in the sample introduction chamber, a sample introduction port communicated with the cavity is formed in the sample introduction chamber, and a sealing structure covering the sample introduction port is arranged on the sample introduction port; one end of the first gas-guide tube extends into the reaction tank, and the other end of the first gas-guide tube is communicated with the chamber; a gas generator; one end of the second gas guide pipe is connected with the gas outlet end of the gas generator, and the other end is communicated with the chamber; the heater is used for heating the test sample in the chamber; a sample introduction platform is further arranged in the chamber, and after the test samples enter the chamber through the sample introduction port, the sample introduction platform enables the gathered test samples to be dispersed in the chamber. The testing device effectively solves the problem of moisture testing of the semi-fluid slurry, and provides a more accurate, rapid and reliable moisture content detection means for the battery manufacturing industry; and the structure is simple, the operation is convenient, and the cleaning is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and more specifically, to a testing device based on the moisture content of battery slurry. Background Art

[0002] In order to strictly control the moisture content of cathode slurry (a semi-fluid substance) during battery production, it is necessary to accurately measure the moisture content of the slurry.

[0003] However, the moisture testing instruments currently on the market are mainly designed for testing liquid and solid samples. They have certain limitations when it comes to testing semi-fluid slurries. The main reason is that semi-fluid slurries tend to aggregate at the bottom of the bottle and are not easily heated evenly, which can easily lead to incomplete evaporation of the moisture in the semi-fluid slurry, resulting in inaccurate test results. Utility Model Content

[0004] The main purpose of this utility model is to propose a moisture testing device designed specifically for semi-fluid slurries, aiming to overcome the shortcomings of existing technologies, provide a more accurate and effective solution for moisture content detection, and ensure that quality control in the battery production process reaches higher standards.

[0005] In order to solve the above technical problems, the present invention proposes a test device based on the moisture content of battery slurry, comprising:

[0006] reaction tank;

[0007] Moisture meter, with cathode probe and anode probe inserted into the reaction cell;

[0008] The injection chamber has a chamber for accommodating the test sample, the injection chamber is provided with an injection port connected to the chamber, and the injection port is provided with a sealing structure for covering the injection port;

[0009] A first air guide tube, one end of which extends into the reaction pool, and the other end of which passes through the injection chamber and is connected to the chamber;

[0010] Gas generator;

[0011] A second air guide tube, one end of which is connected to the gas outlet of the gas generator, and the other end of which passes through the injection chamber and is connected to the chamber;

[0012] and a heater for heating the test sample in the chamber;

[0013] The chamber is also provided with a sample injection platform. After the test sample enters the chamber through the sample injection port, the sample injection platform disperses the aggregated test sample in the chamber.

[0014] In the above technical solution, further, the upper end surface of the injection platform is an inclined surface, and the inclined surface is directly opposite to the injection port.

[0015] In any of the above technical solutions, further, the sealing structure includes:

[0016] The sealing cover is arranged on the sample inlet, has an installation cavity in the sealing cover, and is also provided with an opening communicating with the installation cavity;

[0017] and a gasket, which is arranged in the installation cavity to cover the injection port.

[0018] In any of the above technical solutions, further, the injection port is provided with an annular flange extending outward, the outer surface of the annular flange is provided with an external thread, and the inner wall of the sealing cover is provided with an internal thread adapted to the external thread;

[0019] After the sealing cover is threadedly connected to the annular flange on the injection port, the gasket rests on the outer end surface of the annular flange.

[0020] In any of the above technical solutions, further, there are two gaskets, which are arranged in the installation cavity with an upper and lower spacing.

[0021] In any of the above technical solutions, further, a column is provided in the installation cavity and is located between the two gaskets;

[0022] After the sealing cover is threadedly connected to the annular flange on the injection port, one of the gaskets rests on the outer end surface of the annular flange, and the other gasket rests on the inner end surface of the opening.

[0023] In any of the above technical solutions, further, the sealing structure further includes:

[0024] The sealing sheet is detachably covered on the outer end surface of the opening and is used to seal the opening.

[0025] In any of the above technical solutions, further, the heater is also used to heat the first air duct.

[0026] In any of the above technical solutions, further, the heater is a heating pack coated on the outer surface of the first air duct and the outer surface of the sample inlet chamber.

[0027] In any of the above technical solutions, further, the first air duct and / or the second air duct are threadedly connected to the injection chamber.

[0028] Beneficial effects: Compared with the existing technology, this testing device effectively solves the problem of semi-fluid slurry moisture testing through its unique design, providing the battery manufacturing industry with a more accurate, rapid and reliable means of moisture content detection; it also has a simple structure, is easy to operate and easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural diagram of the utility model;

[0031] Figure 2 This is a schematic diagram of the connection structure between the sealing structure and the injection port of the utility model;

[0032] Figure 3 It is a structural schematic diagram of the utility model in which the heater covers the sample injection chamber.

[0033] The following are the descriptions of the reference numerals:

[0034] 100. Reaction pool; 200. Moisture meter; 300. Sample injection chamber; 310. Sample injection port; 311. Annular flange; 320. Sealing structure; 321. Sealing cover; 3211. Mounting cavity; 3212. Opening; 322. Gasket; 323. Column; 324. Sealing sheet; 330. Sample injection platform; 331. Inclined surface; 400. First gas duct; 500. Gas generator; 600. Second gas duct; 700. Heater. DETAILED DESCRIPTION

[0035] Below, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of the present application, not all of the embodiments of the present application. It should be understood that the present application is not limited to the example embodiments described herein. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that, as shown in this application and the claims, unless the context clearly indicates an exception, the words "a," "an," "an," and / or "the" do not refer to the singular and may include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0037] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The following examples will be used to describe in detail a test device for measuring the moisture content of battery slurry in the present application.

[0041] Example 1:

[0042] like Figure 1-Figure 3As shown, in this embodiment, a test device based on the moisture content of battery slurry is proposed, including: a reaction cell 100; a moisture meter 200, wherein the cathode probe and the anode probe on the moisture meter 200 are inserted into the reaction cell 100; a sampling chamber 300, wherein a chamber for accommodating a test sample is provided, the sampling chamber 300 is provided with a sampling port 310 connected to the chamber, and the sampling port 310 is provided with a sealing structure 320 for covering the same; a first air guide tube 400, one end of which extends into the reaction cell 100 and the other end passes through the sampling chamber 300 and is connected to the chamber; a gas generator 500; a second air guide tube 600, one end of which is connected to the gas outlet of the gas generator 500 and the other end passes through the sampling chamber 300 and is connected to the chamber; and a heater 700 for heating the test sample in the chamber;

[0043] The chamber is further provided with a sample injection platform 330 . After the test sample enters the chamber through the sample injection port 310 , the sample injection platform 330 disperses the aggregated test sample in the chamber.

[0044] The working conditions of this embodiment are as follows: before testing the moisture content of the battery slurry, the sampling chamber 300 is first removed, and the sealing cover 321 is opened. The gasket 322 is installed in the installation cavity 3211 of the sealing cover 321. The sealing cover 321 is then installed on the sampling port 310 of the sampling chamber 300. At this time, the gasket 322 located in the sealing cover 321 is against the outer end surface of the sampling port 310. The sampling chamber 300 is then connected to the first air duct 400 and the second air duct 600. The first air duct 400 is inserted into the reaction cell 100, the second air duct 600 is connected to the gas generator 500, and the moisture meter 200 is inserted into the reaction cell 100. At this time, the assembly of the testing device is completed;

[0045] Next, the heater 700 and the gas generator 500 are turned on. The heater heats the sample inlet chamber 300, and the gas generator 500 generates dry gas. The dry gas enters the sample inlet chamber 300 through the second gas duct 600 and finally flows into the reaction cell 100 through the first gas duct 400, making the air in the entire test system dry. After the drying is completed, the moisture meter 200 is turned on and detects the water content in the reaction cell 100, which is recorded as W1.

[0046] Then, a syringe or other instrument is used to pass through the sealing structure 320 and enter the chamber of the injection chamber 300, and then the slurry is injected into the chamber of the injection chamber 300; at this time, the slurry first flows onto the injection platform 330 and then is evenly dispersed on the injection platform 330;

[0047] The heater 700 heats the slurry dispersed on the sampling platform so that the slurry can be quickly vaporized and dispersed. The slurry enters the reaction tank 100 through the first air duct 400 along with the dry gas generated by the gas generator. An electrolytic reaction occurs in the reaction tank 100 until the reaction is completed. The moisture meter 200 detects the water content in the reaction tank 100 at this time and records it as W2. The water content of the detected battery slurry is W=W2-W1.

[0048] By arranging a sampling platform capable of dispersing the slurry in the sampling chamber, it is possible to avoid the problem that the slurry aggregates when injected into the sampling chamber, resulting in difficulty in uniform heating and incomplete volatilization of the water therein.

[0049] In this embodiment, specifically, the upper end surface of the injection platform 330 is an inclined surface 331 , and the inclined surface 331 is directly opposite to the injection port 310 .

[0050] In order to allow the slurry to be quickly heated and vaporized in the injection chamber 300, an injection platform 330 is provided in the injection chamber 300. The injection platform 330 is in the shape of an inclined platform, and its upper end surface is an inclined surface 331. When the slurry is injected from the injection port 310, it will directly fall onto the inclined surface 331 on the injection platform 330. Under the action of gravity, the slurry will quickly flow downward on the inclined surface 331, so that the slurry has a larger surface area, thereby greatly reducing the time the slurry is heated.

[0051] Through its unique design, this testing device effectively solves the problem of moisture testing in semi-fluid slurries, providing the battery manufacturing industry with a more accurate, rapid and reliable means of moisture content detection.

[0052] Example 2:

[0053] This embodiment is a further improvement based on the first embodiment.

[0054] like Figure 2 As shown, in this embodiment, the sealing structure 320 includes: a sealing cover 321, which is arranged on the injection port 310, and has a mounting cavity 3211 in the sealing cover 321. The sealing cover 321 is also provided with an opening 3212 connected to the mounting cavity 3211; a gasket 322, which is arranged in the mounting cavity 3211 to cover the injection port 310.

[0055] Gasket 322 is used to seal the injection port 310, preventing outside air from entering the injection chamber and affecting the measurement results. However, when the slurry is injected into the injection chamber using a syringe, the needle on the syringe actually leaves a pinhole in the gasket. This pinhole easily allows relatively humid air from the outside to enter the injection chamber 300, thereby interfering with the test value.

[0056] Therefore, in this embodiment, the gasket 322 is optimized to be provided as two pieces, and is provided in the installation cavity 3211 with an interval between the upper and lower pieces; the installation cavity 3211 is also provided with a column 323 located between the two gaskets 322;

[0057] After the sealing cover 321 is threadedly connected to the annular flange 311 on the injection port 310 , one of the gaskets 322 abuts against the outer end surface of the injection port 310 , and the other gasket 322 abuts against the inner end surface of the opening 3212 .

[0058] After setting up two gaskets 322, even if there are pinholes on the gaskets 322, when the outside air wants to enter the sampling chamber, it needs to enter the installation chamber 3211 in the sealing cover 321 first, so the amount of outside air entering the sampling chamber will be greatly reduced.

[0059] In this embodiment, the sealing structure 320 is optimized and further includes: a sealing sheet 324 detachably covering the outer end surface of the opening 3212 for sealing the opening 3212 .

[0060] When injecting the slurry, the sealing sheet is first removed from the opening 3212, and then after the slurry injection is completed, the sealing gasket is installed on the opening to achieve sealing of the injection chamber.

[0061] In this embodiment, it should be noted that the sealing sheet 324 can be adhered to the sealing cover in an adhesive manner to facilitate disassembly.

[0062] In this embodiment, it should be noted that the gas generated by the gas generator 500 is nitrogen, and the nitrogen is used as a drying medium to dry the test system.

[0063] In this embodiment, it should be noted that the heating device 700 is a heating pack, which is coated on the surface of the injection chamber 300. The injection chamber 300 is heated by the heat generated by the heating pack. The heating pack is used as a heating source to facilitate operation.

[0064] Optimally, in order to prevent the gasified slurry from condensing in the first air duct 400 , a heating pack may be coated on the outer surface of the first air duct 400 .

[0065] It should be noted that after the slurry sample test is completed, the next sample test can be continued as needed, or the sampling chamber can be removed, and the sealing cover 321 on the sampling chamber can be opened, and the gasket 322 and the column 323 can be removed in turn for cleaning to facilitate the next use.

[0066] Example 3:

[0067] This embodiment is a further improvement based on the above-mentioned embodiment 2.

[0068] like Figure 3 As shown, in this embodiment, the injection port 310 has an annular flange 311 extending outward, the outer surface of the annular flange 311 is provided with an external thread, and the inner wall of the sealing cover 321 is provided with an internal thread adapted to the external thread;

[0069] After the sealing cover 321 is threadedly connected to the annular flange 311 on the injection port 310 , the gasket 322 abuts against the outer end surface of the annular flange 311 .

[0070] The sealing structure is installed by threaded connection to facilitate assembly.

[0071] It should be noted that the first air guide tube 400 and / or the second air guide tube 600 are also connected to the injection chamber 300 by threaded connection to facilitate assembly.

[0072] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A test device based on the moisture content of battery slurry, characterized in that: include: Reaction tank (100); A moisture meter (200), wherein the cathode probe and the anode probe of the moisture meter (200) are both inserted into the reaction cell (100); A sampling chamber (300) having a chamber for accommodating a test sample, wherein the sampling chamber (300) is provided with a sampling port (310) communicating with the chamber, and a sealing structure (320) for covering the sampling port (310); A first air guide tube (400), one end of which extends into the reaction pool (100) and the other end of which passes through the injection chamber (300) and is connected to the chamber; a gas generator (500); A second air guide tube (600), one end of which is connected to the gas outlet of the gas generator (500), and the other end of which passes through the sample inlet chamber (300) and is connected to the chamber; and a heater (700) for heating the test sample in the chamber; The chamber is further provided with a sample injection platform (330). After the test sample enters the chamber through the sample injection port (310), the sample injection platform (330) disperses the aggregated test sample in the chamber.

2. The battery slurry moisture content testing device according to claim 1, characterized in that: The upper end surface of the injection platform (330) is an inclined surface (331), and the inclined surface (331) is directly opposite to the injection port (310).

3. The battery slurry moisture content testing device according to claim 1, characterized in that: The sealing structure (320) comprises: A sealing cover (321) is provided on the injection port (310), wherein the sealing cover (321) has a mounting cavity (3211) therein, and an opening (3212) communicating with the mounting cavity (3211) is also provided on the sealing cover (321); and a gasket (322) disposed in the mounting cavity (3211) to cover the injection port (310).

4. The battery slurry moisture content testing device according to claim 2, characterized in that: The injection port (310) is provided with an outwardly extending annular flange (311), the outer surface of the annular flange (311) is provided with an external thread, and the inner wall of the sealing cover (321) is provided with an internal thread adapted to the external thread; After the sealing cover (321) is threadedly connected to the annular flange (311) on the injection port (310), the gasket (322) abuts against the outer end surface of the annular flange (311).

5. The battery slurry moisture content testing device according to claim 4, characterized in that: The gasket (322) comprises two pieces, which are arranged in the installation cavity (3211) with an upper and lower spacing.

6. The battery slurry moisture content testing device according to claim 5, characterized in that: A column (323) is further provided in the installation cavity (3211) and is located between the two gaskets (322); After the sealing cover (321) is threadedly connected to the annular flange (311) on the injection port (310), one of the gaskets (322) rests on the outer end surface of the annular flange (311), and the other gasket (322) rests on the inner end surface of the opening (3212).

7. The battery slurry moisture content testing device according to claim 6, characterized in that: The sealing structure (320) further includes: A sealing sheet (324) is detachably covered on the outer end surface of the opening (3212) and is used to seal the opening (3212).

8. The battery slurry moisture content testing device according to claim 1, wherein: The heater (700) is also used to heat the first air guide tube (400).

9. The battery slurry moisture content testing device according to claim 8, characterized in that: The heater (700) is a heating pack covering the outer surface of the first air guide tube (400) and the outer surface of the injection chamber (300).

10. The battery slurry moisture content testing device according to any one of claims 1 to 9, characterized in that: The first air guide tube (400) and / or the second air guide tube (600) are threadedly connected to the injection chamber (300).

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