In-situ measurement device for secondary battery

Abstract

The utility model discloses a kind of secondary battery in-situ measuring devices, belong to secondary battery testing technical field, the secondary battery in-situ measuring device, including intermediate plate body, first panel and second panel, the intermediate plate body, first panel and second panel are all equipped with along the through hole extending in thickness direction, and first panel and second panel are all equipped with and the electrode of external device connection;Compression ring, by screw thread connection assembly in the through hole of the intermediate plate body;Elastic ring body, set in the through hole of the intermediate plate body, and located between compression ring and the inner end surface of first panel;Battery assembly. By increasing compression ring, based on the screw thread connection mode of compression ring and intermediate plate body through hole, only need to exert rotary driving force on compression ring, linear movement of compression ring can be realized, and then the application of experimental material pressure is realized, and the size of pressure is controllable, ensure the close fit of experimental material.

Description

Technical Field

[0001] This utility model belongs to the field of secondary battery testing technology, specifically relating to an in-situ measurement device for secondary batteries. Background Technology

[0002] In-situ measurement technology for secondary batteries is a core means of studying battery working mechanisms, optimizing performance, and analyzing failure causes. By monitoring internal physicochemical changes (such as structural evolution, component distribution, and interface reactions) in real time during dynamic processes such as battery charge-discharge cycles without damaging the battery structure, it can more realistically reflect the behavior of the battery under actual working conditions.

[0003] In existing in-situ measurement devices for secondary batteries, pressure is generally applied to the experimental materials using springs. However, the pressure is uncontrollable and is generally too low to meet experimental requirements. Utility Model Content

[0004] The purpose of this invention is to provide a secondary battery in-situ measurement device to solve the problem of uncontrollable pressure in existing secondary battery in-situ measurement devices mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a secondary battery in-situ measuring device, comprising: The intermediate plate is made of insulating material and has a first end face and a second end face; The first panel is assembled onto the first end face; The second panel is mounted on the second end face. The intermediate plate, the first panel and the second panel are all provided with through holes extending in the thickness direction, and the first panel and the second panel are all provided with electrodes that are connected to external devices. The pressure ring is threadedly connected and assembled into the through hole of the intermediate plate. An elastic ring is disposed in the through hole of the intermediate plate and is located between the pressure ring and the inner end face of the first panel; A battery assembly is disposed between the inner end faces of a pressure ring and a second plate, and includes a first transmission window, an anode material, a separator, a cathode material, and a second transmission window arranged sequentially along the thickness direction of the intermediate plate.

[0006] Furthermore, the measuring device also includes: A pressure cap is fitted onto the outer end face of the first panel; A transmissive film is disposed between the inner end face of the cover and the outer end face of the first panel.

[0007] Furthermore, both the first end face and the second end face are provided with grooves to accommodate the sealing ring.

[0008] Furthermore, the elastic ring is a wave spring.

[0009] Furthermore, the transmission film is a polyimide film.

[0010] Furthermore, both the first and second transmission windows are beryllium windows.

[0011] Furthermore, the inner end face of the second panel is provided with a groove to accommodate the first transmission window.

[0012] Furthermore, the diameter of the through hole in the intermediate plate is larger than the diameter of the through hole in the first panel.

[0013] Furthermore, the measuring device also includes a base that supports the intermediate plate.

[0014] Furthermore, the pressure ring is provided with a slot for inserting a wrench.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This application adds a pressure ring. Based on the threaded connection between the pressure ring and the through hole of the intermediate plate, the linear movement of the pressure ring can be achieved by applying a rotational driving force to the pressure ring, thereby achieving the application of pressure on the experimental material. The pressure is controllable and ensures the tight fit of the experimental material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall measuring device; Figure 2 This is a cross-sectional view of the measuring device; Figure 3 for Figure 2 Enlarged view of the battery module.

[0017] In the picture: 100. Intermediate plate; 100a. First end face; 100b. Second end face; 101. First panel; 102. Second panel; 103. Cover; 104. Transmission film; 105. Electrode; 200. Pressure ring; 201. Slot; 202. Elastic ring body; 300, First transmission window; 301, Anode material; 302, Diaphragm; 303, Cathode material; 304, Second transmission window; 400, base; 401, wrench. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The aforementioned measuring device also includes a pressure cap 103 mounted on the outer end face (i.e., the end face away from the intermediate plate) of the first panel 101. Exemplarily, the pressure cap 103 and the first panel 101 are respectively provided with multiple countersunk threaded holes, and the connection between the first panel 101 and the pressure cap 103 is achieved by countersunk screws. (Refer to...) Figure 2 The first panel 101 has a groove on its outer end face to accommodate a sealing ring, which is used to seal the contact surface between the first panel 101 and the pressure cover 103. In some embodiments, the measuring device further includes a transmission film 104 disposed between the contact surface between the first panel 101 and the pressure cover 103. For example, the transmission film 104 is a polyimide film, which can improve the X-ray transmittance while ensuring safety in the high-pressure environment 200.

[0020] Reference Figure 2 The first panel 101, the intermediate plate 100, the second panel 102, and the pressure cap 103 are all provided with through holes extending along the thickness direction, and the axes of the through holes of the first panel 101, the intermediate plate 100, the second panel 102, and the pressure cap 103 coincide. Meanwhile, the diameter of the through hole in the intermediate plate 100 is larger than the diameter of the through holes in the first panel 101 and the second panel 102. Correspondingly, the measuring device also includes a pressure ring 200 that is threadedly connected and assembled into the through hole of the intermediate plate 100. The outer wall surface of the pressure ring 200 and the inner wall surface of the through hole of the intermediate plate 100 are provided with matching thread structures. When the pressure ring 200 rotates under external force, it can move linearly along the axis of the through hole in the intermediate plate 100. Based on the linear movement of the pressure ring 200, pressure can be applied to the subsequent battery assembly. In some embodiments, the pressure ring 200 is provided with a slot 201 into which a wrench 401 can be inserted. By applying a rotational force to the wrench 401, the pressure ring 200 can be driven to rotate, thereby realizing the linear movement of the pressure ring 200.

[0021] Continue to refer to Figure 2The aforementioned measuring device further includes a battery assembly disposed between the inner end face of the second panel 102 and the pressure ring 200, and an elastic ring 202 disposed between the inner end face of the first panel 101 and the pressure ring 200. That is, the two ends of the battery assembly abut against the inner end face of the second panel 102 and one end face of the pressure ring 200, respectively, and the two ends of the elastic ring 202 abut against the inner end face of the first panel 101 and the other end face of the pressure ring 200, respectively. The elastic ring 202 is made of conductive material to form a connecting loop between the subsequent cathode material 303 and the first panel 101. At the same time, based on the deformation capability of the elastic ring 202, when the pressure ring 200 moves linearly, the two ends of the elastic ring 202 can maintain contact with the pressure ring 200 and the inner end face of the first panel 101 to ensure the continuity of the loop. For example, the aforementioned elastic ring 202 is a wave spring.

[0022] Reference Figure 2 and combined Figure 3 The battery assembly includes a first transmission window 300, an anode material 301, a separator 302, a cathode material 303, and a second transmission window 304 arranged sequentially along the thickness direction of the intermediate plate 100. For example, both the first transmission window 300 and the second transmission window 304 are beryllium windows with high X-ray transmittance and can withstand pressure during the test. In some embodiments, the inner end face of the second panel 102 is provided with a groove to accommodate the first transmission window 300. Reference Figure 1 The measuring device also includes a base 400, which serves as a support for the intermediate plate 100. In some examples, the base 400 is configured as an L-shaped base 400, and the base plate of the base 400 is provided with a plurality of threaded through holes.

[0023] In some embodiments, the above-mentioned measuring device may be equipped with a heating element or a cooling element to change the device temperature, and a gas connector may be added to enable secondary battery reaction measurement under different gas atmospheres.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A secondary battery in-situ measurement device, characterized in that, include: The intermediate plate (100) is made of insulating material and has a first end face (100a) and a second end face (100b). The first panel (101) is mounted on the first end face (100a); The second panel (102) is mounted on the second end face (100b). The intermediate plate (100), the first panel (101) and the second panel (102) are all provided with through holes extending in the thickness direction, and the first panel (101) and the second panel (102) are all provided with electrodes (105) that are connected to external devices. The pressure ring (200) is threadedly assembled into the through hole of the intermediate plate (100); An elastic ring (202) is disposed in the through hole of the intermediate plate (100) and located between the pressure ring (200) and the inner end face of the first panel (101); The battery assembly is disposed between the inner end face of the pressure ring (200) and the second plate, and includes a first transmission window (300), an anode material (301), a separator (302), a cathode material (303), and a second transmission window (304) arranged sequentially along the thickness direction of the intermediate plate (100).

2. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The measuring device further includes: A pressure cap (103) is fitted onto the outer end face of the first panel (101); A transmissive film (104) is disposed between the inner end face of the cover (103) and the outer end face of the first panel (101).

3. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: Both the first end face (100a) and the second end face (100b) are provided with grooves for accommodating the sealing ring.

4. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The elastic ring (202) is a wave spring.

5. The in-situ measurement device for a secondary battery according to claim 2, characterized in that: The transmission film (104) is a polyimide film.

6. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: Both the first transmission window (300) and the second transmission window (304) are beryllium windows.

7. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The inner end face of the second panel (102) is provided with a groove to accommodate the first transmission window (300).

8. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The diameter of the through hole in the intermediate plate (100) is larger than the diameter of the through hole in the first panel (101).

9. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The measuring device also includes a base (400) that supports the intermediate plate (100).

10. The in-situ measurement device for a secondary battery according to claim 1, characterized in that: The pressure ring (200) is provided with a slot (201) for inserting a wrench (401).

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