CN200962138Y - Fully enclosed three-electrode system test device - Google Patents

Abstract

The utility model discloses a totally enclosed three-electrode system testing device, which comprises a main body part and an outer ring part, wherein the main body part is provided with a containing cavity for containing electrolyte, and the main body part is provided with an electrolyte injection hole, a research electrode placing channel, an auxiliary electrode placing channel and a reference electrode placing channel which are communicated with the containing cavity; the outer ring part is sleeved on the main body part, a through hole is formed in each embedding channel corresponding to the main body part, and a sealing fixing part is inserted into the corresponding embedding channel along the through hole. The three-electrode system can be assembled into a simulated lithium ion battery three-electrode system in an open environment at room temperature, and electrochemical performance tests, such as tests of charge and discharge capacity, cyclic voltammetry curves, electrochemical alternating-current impedance and the like, can be effectively carried out on the three-electrode system. Meanwhile, the device has the effects of good sealing performance, accurate test data, simple and convenient operation, low cost and good safety performance. The utility model discloses simple structure, the practicality is strong.

Description

Fully enclosed three-electrode system test device

technical field

The utility model relates to a three-electrode system testing device, in particular to a fully enclosed three-electrode system testing device for testing the electrochemical performance of electrodes of a simulated lithium ion battery.

Background technique

With the rapid development of science and technology, lithium-ion batteries are an indispensable power source for various high-tech electronic devices and mobile devices. They have high working voltage, small size, light weight, high energy, no memory effect, no pollution and small self-discharge. Long cycle life and other advantages, for example, are widely used in portable electronic devices such as notebook computers, mobile phones, digital cameras, small video cameras, MP3, MP4 and personal digital assistants (PDA); Lithium-ion batteries have currently set off worldwide Especially in today's increasingly scarce energy sources, the importance of this kind of research is even more prominent; therefore, how to effectively and easily test the electrochemical performance of lithium-ion battery electrodes is also highlighted. Traditional test batteries The electrochemical performance of the electrode is to use the finished battery to test its positive electrode, negative electrode and electrolyte. Generally, it is necessary to compare the reference electrode in the test process to get an accurate test conclusion. For the finished battery It is impossible to insert the reference electrode, so the obtained data is difficult to accurately judge the electrochemical performance between the positive electrode, the negative electrode and the electrolyte of the battery.

At present, in order to solve the above problems in the industry, a three-electrode system test method has emerged, which is completed by placing the positive and negative electrodes, reference electrodes and electrolyte in a glove box. The glove box is used to collect lithium ions During the simulated three-electrode system and electrochemical test process, the test process can be realized in its sealed glove box, but the operation is cumbersome and the sealing effect is not good, which will affect the test data. The test equipment must be placed in the glove box, which causes waste of resources, high cost, and inconvenient operation, causing troubles in the testing process in the industry.

Utility model content

The utility model aims at the deficiencies of the above-mentioned prior art, and the main purpose is to provide a fully enclosed three-electrode system testing device for lithium-ion batteries, which can be assembled into a simulated three-electrode system for lithium-ion batteries in an open environment at room temperature and effectively It conducts electrochemical performance tests, and has the effects of good sealing, accurate test data, easy operation, low cost and good safety performance.

In order to achieve the above-mentioned purpose, the utility model takes the following technical solutions:

A fully enclosed three-electrode system testing device, comprising:

A main body part with an accommodating cavity containing an electrolyte, the main body is provided with an electrolyte injection hole communicating with the accommodating cavity, a research electrode insertion channel, an auxiliary electrode insertion channel and a reference electrode insertion channel ;

An outer ring part, the outer ring part is sheathed on the main body part, and a through hole is provided corresponding to each insertion channel of the main body part, and a sealing fixing part is inserted into the through hole and the corresponding insertion channel.

The main body is made of stainless steel or high-strength aluminum alloy.

The main body is a cylindrical structure or a triangular prism structure.

Compared with the prior art, the utility model has the beneficial effects as follows:

1. It can be assembled into a simulated lithium-ion battery three-electrode system in an open environment at room temperature and effectively perform electrochemical performance tests on it, such as charge-discharge capacity, cyclic voltammetry curves, and electrochemical AC impedance tests.

2. It has good sealing performance, accurate test data, easy operation, low cost and good safety performance.

3. The utility model has simple structure and strong practicability.

Description of drawings

Fig. 1 is a schematic view of the appearance structure of the first embodiment of the utility model;

Fig. 2 is a schematic diagram of the decomposition structure of the utility model;

Fig. 3 is a schematic diagram of the top view of Fig. 1;

Fig. 4 is a schematic diagram of the cross-sectional structure of A-A of Fig. 3;

Fig. 5 is a schematic diagram of the appearance structure of the second embodiment of the utility model;

FIG. 6 is a schematic top view of the structure in FIG. 5 .

Explanation of reference numbers:

1. Main body 11. Accommodating cavity 12. Injection hole 13. Research electrode insertion channel 14. Auxiliary electrode insertion channel 15. Reference electrode insertion channel 2. Outer ring 21. Through hole 22. Fixing piece

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Please refer to Fig. 1 to Fig. 4, which are specific structural diagrams of the first embodiment of the present invention; the fully enclosed three-electrode system test device includes a main body (1) and an outer ring (2), wherein:

The main body (1) is cylindrical and can be made of stainless steel or high-strength aluminum alloy. It has an accommodating cavity (11) in the center, and is provided along the periphery of the main body (1) to communicate with the accommodating cavity (11). The electrolyte injection hole (12), the research electrode insertion channel (13), the auxiliary electrode insertion channel (14) and the reference electrode insertion channel (15), each channel can be inserted into the corresponding electrode and drawn out to the outside, so The above-mentioned injection hole (12) is designed to provide electrolyte injection into the accommodating cavity (11).

The outer ring part (2) is in the shape of a ring, and the outer ring part (2) is sheathed on the main body part (1), and each insertion channel (13, 14, 15) of the main body part (1) is provided with a hole (21), insert a sealing fixture (22) along the through hole (21) and its corresponding insertion channel (13, 14, 15), so as to fix the outer ring part on the main body part and play the role of The effect of sealing.

The operating principle of the utility model fully enclosed three-electrode system testing device is as follows:

First, the research electrodes, auxiliary electrodes, and reference electrodes are sequentially inserted into the accommodation cavity (11) of the main body (1) from the corresponding insertion channels (13, 14, 15), and each electrode is connected with a nickel wire. Pull it out and connect it with the corresponding test equipment for electrochemical performance testing, such as charge and discharge capacity, cyclic voltammetry curve and electrochemical AC impedance test; then put the outer ring part (2) on the main part (1), Then through the through hole (22) provided by the outer ring part (2) and the corresponding insertion channel (13, 14, 15) on the corresponding main part through the sealing fixture (22), and finally from the main part (1) Inject the corresponding electrolyte solution into the empty space (11) into the injection hole (12) of the injection hole (12), thereby completing the assembly of the three-electrode system of the simulated lithium-ion battery. In other words, it has the effects of good sealing, accurate test data, easy operation, low cost and good safety performance.

As shown in Fig. 5 and Fig. 6 again, it is a specific structural diagram of the second embodiment of the present invention; wherein, this embodiment also includes a main body portion (1) and an outer ring portion (2), which is the same as that of the first embodiment In comparison, the only difference is that the main body ( 1 ) and the outer ring ( 2 ) in this embodiment are in the shape of a triangular prism, and the rest of the structures are the same, so they will not be repeated here. Therefore, the above-mentioned cylindrical and triangular prism-shaped main body and outer ring structure are designed for more convenient operation and combination. However, other shapes of the main body and outer ring can also be used to achieve the utility model. purpose and are therefore limited here.

The above is only a preferred embodiment of the fully enclosed three-electrode system testing device of the present utility model, and does not limit the technical scope of the present utility model. Minor modifications, equivalent changes and modifications all still belong to the scope of the technical solutions of the present utility model.

Claims (3)

1. A fully enclosed three-electrode system testing device, characterized in that: comprising: A main body part with a containing cavity for containing electrolyte, the main part is provided with an electrolyte injection hole communicating with the containing cavity, a research electrode insertion channel, an auxiliary electrode insertion channel and a reference electrode insertion hole aisle; An outer ring part, the outer ring part is sheathed on the main body part, and each insertion channel corresponding to the main body part is provided with a through hole, and a sealing fixing part is inserted into the through hole and the corresponding insertion channel. 2. The fully enclosed three-electrode system testing device according to claim 1, wherein the main body is made of stainless steel or high-strength aluminum alloy. 3. The fully enclosed three-electrode system testing device according to claim 1, characterized in that: the main body has a cylindrical structure or a triangular prism structure.

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