Small separable circular cell detection and measurement device

Abstract

The invention discloses a small separable circular battery cell detection and measurement device, and belongs to the technical field of battery cell detection. The invention aims to solve the problems of complicated assembly, non-uniform stress, poor sealing performance, high cost, difficulty in repeated utilization and the like of the existing battery cell detection device. The device comprises a lower shell, an upper shell, an insulating guide sleeve, a long electrode column, a short electrode column, a pressing column and a sealing bolt, and rapid assembling and testing of a circular battery cell are achieved through modular design. The upper shell and the lower shell are in threaded connection through an insulating guide sleeve and are matched with a sealing ring to realize sealing; the long electrode column and the short electrode column are respectively connected with positive and negative electrodes; the pressing column is matched with the sealing bolt to adjust the thickness and the internal pressure of the electrode plate; meanwhile, the device is small in size and convenient to disassemble, can be operated in a glove box, is suitable for testing electrode plates with different thicknesses, can be repeatedly used, and effectively improves the detection efficiency and reliability in the research and development process of battery cells and electrode materials.

Description

Technical Field

[0001] This invention relates to the field of battery cell testing technology, and in particular to a small, detachable circular battery cell testing and measuring device. Background Technology

[0002] Battery cell simulation and testing are widely used in electrode material performance testing, but currently available related devices and molds both domestically and internationally have many defects. For example, the commonly used button cell simulated battery device suffers from wear and tear at the machining precision and sealing points, leading to a gradual and significant decrease in yield. This necessitates frequent replacements of the device, increasing costs. Other organizations have designed and manufactured other testing simulation devices, but due to the large number of components and cumbersome assembly, it is difficult to control the contact force and pressure between the electrodes and the tested material during assembly, resulting in uneven stress. This often causes short circuits or open circuits during testing, resulting in low assembly success rates, high costs, and low efficiency. Some devices also suffer from poor overall sealing due to the large number of sealing points, leading to subsequent aging of the seals and causing many problems, significantly impacting the research and development process. Summary of the Invention

[0003] The present invention aims to provide a small, separable circular battery cell testing and measurement device, which realizes modular simulation of circular battery cell fabrication, with fewer parts, facilitates quick assembly and testing of battery cells, and effectively ensures that the voltage and internal resistance changes of the positive and negative electrodes can be effectively detected during battery research. It also has the advantages of easy disassembly, adjustable thickness to adapt to electrode sheets of different thicknesses, small size that can be operated in a glove box, and reusability.

[0004] To achieve the above objectives, the present invention provides a small, separable circular battery cell testing and measuring device, comprising a lower shell, an upper shell, an insulating guide sleeve, a long electrode post, a short electrode post, and a pressure post. The lower shell has a first concave hollow cavity inside, and the upper shell has a second concave hollow cavity inside. The two ends of the insulating guide sleeve are threadedly connected to the inner walls of the first and second concave hollow cavities, respectively. The center of the insulating guide sleeve is hollow. The long electrode post, the short electrode post, and the pressure post are installed within the hollow structure of the insulating guide sleeve. The top of the upper shell has a cylindrical boss with a threaded through hole in the center. The pressure post has a semi-circular liquid injection groove in the center, connecting the threaded through hole to the semi-circular liquid injection groove to form a liquid injection cavity. A sealing bolt is provided at the top of the liquid injection cavity.

[0005] Preferably, the outer side of the lower shell is provided with a lower electrode ring hole, and the outer side of the upper shell is provided with an upper electrode ring hole. The upper electrode ring hole and the lower electrode ring hole are electrically connected to the long electrode post and the short electrode post respectively through leads.

[0006] Preferably, the dimensions of the upper electrode ring hole and the lower electrode ring hole are automatically increased and deepened according to the size of the lead wire, and the diameters of the upper electrode ring hole and the lower electrode ring hole match the diameter of the lead wire.

[0007] Preferably, an annular groove is provided on the upper part of the lower shell, and a sealing ring is provided in the annular groove. The top surface of the lower shell is sealed to the bottom surface of the upper shell through the sealing ring.

[0008] Preferably, the sealing ring is an O-ring, and the material of the sealing ring is polytetrafluoroethylene, which has corrosion resistance and high temperature resistance properties.

[0009] Preferably, the insulating guide sleeve is cylindrical, and the outer diameter of the insulating guide sleeve is the same as the inner diameter of the first concave hollow cavity and the second concave hollow cavity. The upper shell and the lower shell are respectively sleeved on the upper and lower ends of the insulating guide sleeve, and the material of the insulating guide sleeve is acetal-based insulating material.

[0010] Preferably, the upper shell, lower shell, and pressure column are made of 304 stainless steel.

[0011] Preferably, the long electrode post, the short electrode post, and the pressure post are installed in layers from bottom to top within the hollow structure of the insulating guide sleeve, and the long electrode post and the short electrode post are made of 316 stainless steel.

[0012] Preferably, the sealing bolt adopts an external hexagonal ball head structure, and the size of the ball head of the sealing bolt is consistent with the inner diameter of the semi-circular injection groove on the pressure column. The torque is adjusted by rotating the sealing bolt with a special wrench. The sealing bolt is made of 304 stainless steel.

[0013] Therefore, compared with the prior art, the present invention has the following beneficial effects: The present invention has a simple structure, realizes modular simulation of circular battery cell production, facilitates rapid assembly and testing of battery cells, and effectively ensures that the electrode voltage and internal resistance changes can be effectively detected during the research process. It also has the advantages of easy disassembly, adjustable thickness to adapt to electrode sheets of different thicknesses, small size, good sealing performance, high success rate, operation in a glove box, and reusability.

[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a front view of the present invention;

[0017] Figure 3This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a top view of the present invention.

[0019] Figure label:

[0020] 1. Upper shell; 2. Lower shell; 3. Insulating guide sleeve; 4. Short electrode post; 5. Long electrode post; 6. Pressure post; 7. Sealing ring; 8. Sealing bolt; 9. Liquid injection tank; 10. Upper electrode ring hole; 11. Lower electrode ring hole. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Example

[0024] Please see Figures 1-4This invention provides a small, separable circular battery cell testing and measuring device, comprising a lower shell 2, an upper shell 1, an insulating sleeve 3, a long electrode post 5, a short electrode post 4, and a pressure post 6. The upper shell 1 and lower shell 2 are both made of 304 stainless steel, and the insulating sleeve 3 is made of acetal-based insulating material. The lower shell 2 is cylindrical and has a first concave hollow cavity inside. The upper shell 1 is convex and has a second concave hollow cavity inside. The insulating sleeve 3 is cylindrical with threads on its outer wall, and its diameter is consistent with the inner diameter threads of the first and second concave hollow cavities. The two ends of the insulating sleeve 3 are respectively threaded to the inner walls of the first and second concave hollow cavities, thus achieving mutual connection between the upper shell 1 and the lower shell 2 through the threads of the insulating sleeve 3. An annular groove is formed on the upper part of the lower shell 2, and a sealing ring 7 is placed in the annular groove. The sealing ring 7 is embedded in the annular groove, so that the top surface of the lower shell 2 is sealed to the bottom surface of the upper shell 1 through the sealing ring 7. During installation, the internal threads of the upper and lower shells are screwed together by the external threads of the insulating guide sleeve 3, and the sealing effect is achieved by the characteristics of the O-ring sealing ring 7. The sealing ring 7 is an O-ring made of polytetrafluoroethylene or other similar materials, which has corrosion resistance and high temperature resistance. The center of the insulating guide sleeve 3 is a hollow structure, forming a cavity for placing the short electrode post 4, the long electrode post 5, the pressure post 6, and the battery material to be tested. The long electrode post 5, the short electrode post 4, and the pressure post 6 are installed in layers from bottom to top in the hollow structure of the insulating guide sleeve 3. The long electrode post 5 is made of 316 stainless steel and is located at the bottom of the cavity of the insulating guide sleeve 3. The short electrode post 4 is made of 316 stainless steel and is located above the long electrode post 5. The pressure post 6 is located above the short electrode post 5.

[0025] The top of the upper shell 1 is provided with a cylindrical boss, and a threaded through hole is opened in the middle of the cylindrical boss. A semi-circular liquid injection groove 9 is opened in the middle of the pressure column 6. The threaded through hole and the semi-circular liquid injection groove are connected to form a liquid injection cavity. A sealing bolt 8 is provided at the top of the liquid injection cavity. The sealing bolt 8 is used to seal the liquid injection cavity in the cylindrical boss. The bolt can also be rotated to adjust the internal pressure below the pressure column 6 and adjust the thickness of the internal electrode material. The sealing bolt 8 is made of 304 stainless steel and adopts an external hexagonal ball head structure, which makes it easy to tighten with tools such as torque wrenches and observe the torque value to adjust the torque. The ball head of the sealing bolt 8 is the same as the inner diameter of the semi-circular liquid injection groove 9 on the pressure column 6. The torque is adjusted by rotating the sealing bolt 8 with a special wrench. The sealing bolt 8 can be used to seal the liquid injection cavity by adjusting the torque of the rotating bolt. The bolt can also be used to adjust the internal pressure, fix the battery material to be tested, and adjust the thickness of the electrode material to be tested.

[0026] The outer surface of the lower shell 2 is provided with a lower electrode ring hole 11, and the outer surface of the upper shell 1 is provided with an upper electrode ring hole 10. The upper electrode ring hole 10 and the lower electrode ring hole 11 are electrically connected to the long electrode post 5 and the short electrode post 4 respectively through lead wires. The electrodes of the battery material to be tested inside can be led out for testing through the upper electrode ring hole 10 and the lower electrode ring hole 11 on the contacting upper shell 1 and lower shell 2 through various required material posts or other types of lead wires. The size of the upper electrode ring hole 10 and the lower electrode ring hole 11 is automatically enlarged and deepened according to the size of the lead wire, and the diameter of the upper electrode ring hole 10 and the lower electrode ring hole 11 matches the diameter of the lead wire. In this embodiment, the diameter of the electrode ring hole is 4mm and the length is 15mm. In order to facilitate tightening of the upper shell 1 and the lower shell 2 with a wrench through the insulating guide sleeve 3 and to facilitate tool fixation and transfer of the measuring device, the outer surfaces of the upper shell 1 and the lower shell 2 can also be made into a polygonal structure.

[0027] During installation, first, screw the lower shell 2 onto one end of the insulating guide sleeve 3 and tighten it all the way down. Place the sealing ring 7 on the upper edge of the lower shell 2. Then, place the long electrode post 5, the battery material to be tested (positive electrode, separator, negative electrode), and the short electrode post 4 into the middle cavity of the insulating guide sleeve 3 in sequence. Next, place the pressure post 6. Then, screw the upper shell 1 onto the remaining end of the insulating guide sleeve 3 and tighten it all the way down to contact the sealing ring 7 on the upper shell 2. After filling with liquid, tighten the sealing bolt 8. Finally, insert the lead wires into the upper electrode ring hole 10 and the lower electrode ring hole 11 on the upper shell 1 and the lower shell 2 respectively for testing. Installation and disassembly are very convenient.

[0028] Therefore, the present invention has a simple structure, realizes modular simulation of circular battery cell production, facilitates rapid assembly and testing of battery cells, and effectively ensures that electrode voltage and internal resistance changes can be effectively detected during battery research. It also has the advantages of easy disassembly, adjustable thickness to adapt to different electrode materials, small size, good sealing performance, high success rate, operation in a glove box, and reusability.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A small, detachable circular battery cell testing and measuring device, characterized in that: The device includes a lower shell, an upper shell, an insulating guide sleeve, a long electrode post, a short electrode post, and a pressure post. The lower shell has a first concave hollow cavity inside, and the upper shell has a second concave hollow cavity inside. The two ends of the insulating guide sleeve are threaded to the inner walls of the first and second concave hollow cavities, respectively. The center of the insulating guide sleeve is hollow. The long electrode post, the short electrode post, and the pressure post are installed inside the hollow structure of the insulating guide sleeve. The top of the upper shell has a cylindrical boss with a threaded through hole in the middle. The pressure post has a semi-circular liquid injection groove in the middle. The threaded through hole and the semi-circular liquid injection groove are connected to form a liquid injection cavity. A sealing bolt is provided at the top of the liquid injection cavity.

2. The small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: The outer surface of the lower shell is provided with a lower electrode ring hole, and the outer surface of the upper shell is provided with an upper electrode ring hole. The upper electrode ring hole and the lower electrode ring hole are electrically connected to the long electrode post and the short electrode post respectively through leads.

3. The small, detachable circular battery cell testing and measuring device according to claim 2, characterized in that: The dimensions of the upper electrode ring hole and the lower electrode ring hole are automatically increased and deepened according to the size of the lead wire, and the diameters of the upper electrode ring hole and the lower electrode ring hole match the diameter of the lead wire.

4. The small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: An annular groove is provided on the upper part of the lower shell, and a sealing ring is provided in the annular groove. The top surface of the lower shell is sealed to the bottom surface of the upper shell through the sealing ring.

5. The small, detachable circular battery cell testing and measuring device according to claim 4, characterized in that: The sealing ring is an O-ring, and the material of the sealing ring is polytetrafluoroethylene, which has corrosion resistance and high temperature resistance.

6. The small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: The insulating guide sleeve is cylindrical, and its outer diameter is the same as the inner diameter of the first concave hollow cavity and the second concave hollow cavity. The upper shell and the lower shell are respectively fitted onto the upper and lower ends of the insulating guide sleeve. The insulating guide sleeve is made of acetal insulating material.

7. The small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: The upper shell, lower shell, and pressure column are made of 304 stainless steel.

8. The small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: The long electrode post, the short electrode post, and the pressure post are installed in layers from bottom to top within the hollow structure of the insulating guide sleeve. The long electrode post and the short electrode post are made of 316 stainless steel.

9. A small, detachable circular battery cell testing and measuring device according to claim 1, characterized in that: The sealing bolt adopts an external hexagonal ball head structure, and the size of the ball head of the sealing bolt is consistent with the inner diameter of the semi-circular injection groove on the pressure column. The torque is adjusted by rotating the sealing bolt with a special wrench. The sealing bolt is made of 304 stainless steel.

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