Collecting device for gas produced by battery

Abstract

The utility model belongs to the technical field of battery formation, and particularly relates to a battery produced gas collecting device. The produced gas collecting device comprises a gas path connecting device which is provided with a plurality of mutually communicated gas paths, and one gas path is connected with a battery; the gas sampling container is connected with one gas path of the connecting device, and the gas sampling container is used for acquiring a small amount of gas generated by the battery; and the gas collecting container is connected with one gas path of the connecting device, and the gas collecting container is used for obtaining gas generated by the battery. The battery produced gas collecting device provided by the utility model can accurately and quantitatively detect the components of the battery formation gas and each component, and can dynamically monitor and analyze the components of the formation gas generated at different stages in real time in the battery formation process.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery formation, and in particular relates to a battery gas generation collection device. Background Art

[0002] Battery formation mainly refers to the process of forming a SEI film (solid electrolyte cross-section membrane) on the negative electrode surface and producing formation gases (CO2, H2, etc.) when the lithium battery is charged for the first time. The quality of the SEI film has an important impact on the cycle life, stability, self-discharge and safety of lithium batteries.

[0003] The volume, composition and content of each component of the formed gas during the battery formation process can reflect the quality of the SEI film. Therefore, the study of the volume, composition and content of each component of the formed gas can serve as a guiding basis for optimizing the various component materials of lithium batteries, thereby providing analytical support for improving the comprehensive performance of lithium batteries. However, in actual battery formation gas detection and analysis, the existing battery formation gas detection device can generally only detect the volume of the formed gas, but cannot realize the accurate quantitative detection of the composition and each component of the formed gas, and at the same time cannot realize the real-time dynamic monitoring and analysis of the composition of the formed gas generated at different stages during the formation process, thus bringing great inconvenience to the detection and analysis of the formed gas. Utility Model Content

[0004] The utility model provides a battery gas generation collection device to achieve accurate quantitative detection of the components of battery formation gas and each component, and simultaneously achieves real-time dynamic monitoring and analysis of the components of formation gas generated at different stages during the battery formation process.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a gas production and collection device, comprising: a gas path connecting device, wherein the gas path device is provided with a plurality of gas paths interconnected with each other, and one gas path is connected to a battery; a gas sampling container, wherein the gas sampling container is connected to a gas path of the connecting device, and the gas sampling container is used to obtain a small amount of gas produced by the battery; and a gas collection container, wherein the gas collection container is connected to a gas path of the connecting device, and the gas collection container is used to obtain gas produced by the battery.

[0007] Furthermore, the gas collection device also includes a fixing device, and the fixing device is used to fix the gas path connecting device on the battery.

[0008] Furthermore, the fixing device comprises a U-shaped fixing frame, a fixing nut and a fixing gasket, the fixing frame and the fixing gasket are connected by the fixing nut, and one end of the fixing gasket is against the battery.

[0009] Optionally, the fixing gasket is made of metal or plastic.

[0010] Furthermore, the battery has an opening, and a gas path of the gas path connecting device is connected to the opening.

[0011] Furthermore, the fixing device also includes a variable diameter air pipe ferrule, the variable diameter air pipe ferrule is arranged between the air path connecting device and the battery, and the variable diameter ferrule is applied to the openings with different apertures.

[0012] Optionally, the opening is a liquid injection hole.

[0013] Optionally, the gas circuit connecting device is a stainless steel five-way valve.

[0014] Optionally, the gas sampling container is an aluminum foil gas sampling bag and / or a negative pressure vacuum glass tube.

[0015] Optionally, the gas collection container is an aluminum foil gas collection bag and / or a balloon.

[0016] Furthermore, the gas generation and collection device also includes an air pressure measuring device, which is connected to an air path of the air path connecting device and is used to measure and monitor the internal air pressure of the battery.

[0017] Optionally, the air pressure regulating device is a vacuum pump.

[0018] The present application also provides a battery formation gas collection device, comprising any of the gas generation collection devices described above.

[0019] By using the battery gas generation collection device provided by the utility model, accurate quantitative detection of the composition of the battery formation gas and each component can be achieved, and real-time dynamic monitoring and analysis of the composition of the formation gas generated at different stages during the battery formation process can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings of the embodiments of the present invention are used as a part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0021] Figure 1 Schematic diagram of the battery formation gas collection device structure

[0022] Figure 2 Schematic diagram of the fixing device structure

[0023] In the figure: 1. battery; 2. air pressure regulating device; 3. air path connecting device; 4. gas sampling device; 5. air pressure testing device; 6. gas collecting device; 7. fixing device; 71. U-shaped fixing bracket; 72. fixing nut; 73. fixing gasket; 74. variable diameter air pipe ferrule. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the embodiments of the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the utility model, some technical features known in the art are not described. The utility model is further described in detail below in conjunction with the accompanying drawings and examples. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for ease of description, only parts related to the utility model are shown in the accompanying drawings, not all structures. In the description of the utility model, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense.

[0025] In the description of this embodiment, the terms "both sides", "upper", "lower", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0026] In order to achieve accurate quantitative detection of the composition of battery formation gas and each component, and to realize real-time dynamic monitoring and analysis of the composition of formation gas generated at different stages during the battery formation process, this embodiment provides a battery gas generation collection device.

[0027] like Figure 1 As shown, the gas production and collection device described in this embodiment includes: a gas path connecting device 3, wherein the gas path connecting device 3 is provided with a plurality of gas paths interconnected with each other, and one gas path is connected to the battery 1; a gas sampling device 4, wherein the gas sampling device 4 is connected to a gas path of the gas path connecting device 3, and the gas sampling device 4 is used to obtain a small amount of gas generated by the battery 1; a gas collecting device 6, wherein the gas collecting device 6 is connected to a gas path of the gas path connecting device 3, and the gas collecting device 6 is used to obtain the gas generated by the battery 1.

[0028] The gas path connecting device 3 connects the battery and the gas sampling device 4 and the gas collecting device 6. At a certain stage in the gas production process of the battery 1, the gas sampling device 4 obtains a small amount of gas produced by the battery 1 for analyzing and inspecting the gas composition. The gas sampling device 4 only needs to obtain a small amount of gas volume that meets the purpose of analyzing and inspecting the gas composition, and the gas collecting device 6 is used to collect the remaining gas except the gas obtained by the gas sampling device 4 during the gas production process of the battery 1, which is used to analyze and inspect the gas composition and the total amount of gas.

[0029] like Figure 1 As shown, the gas production collection device further includes a fixing device 7 , and the fixing device 7 is used to fix the gas path connecting device 3 on the battery 1 .

[0030] like Figure 2 As shown, the fixing device 7 includes a U-shaped fixing frame 71, a fixing nut 72 and a fixing washer 73. The U-shaped fixing frame 71 and the fixing washer 73 are connected by the fixing nut 72, and one end of the fixing washer 73 abuts against the battery 1. Optionally, the fixing washer 73 is made of metal or plastic, and is used to prevent the battery 1 from being crushed or scratched when the fixing device 7 is installed on the battery 1.

[0031] Furthermore, the battery 1 has an opening, and a gas path of the gas path connecting device 3 is connected to the opening to transmit the gas generated by the battery 1 to other devices.

[0032] Furthermore, the fixing device 7 also includes a variable diameter air pipe ferrule 74, and the variable diameter air pipe ferrule 74 is installed between the air path connecting device 3 and the battery 1, and is used to adapt to openings of different calibers.

[0033] Optionally, the opening is a liquid injection hole.

[0034] Optionally, the gas circuit connecting device 3 is a stainless steel five-way valve.

[0035] Optionally, the gas sampling container 4 is an aluminum foil gas sampling bag and / or a negative pressure vacuum glass tube.

[0036] Optionally, the gas collection container 6 is an aluminum foil gas collection bag and / or a balloon.

[0037] Furthermore, the gas collection device also includes an air pressure measuring device 5, which is connected to an air path of the air path connecting device 3 and is used to measure and monitor the internal air pressure of the battery. The air pressure measuring device 5 can be a pressure gauge and / or a pressure sensor.

[0038] Optionally, the air pressure regulating device 5 is a vacuum pump.

[0039] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery gas collection device, characterized in that: The gas production collection device comprises: A gas circuit connection device, wherein the gas circuit connection device is provided with a plurality of gas circuits interconnected with each other, and one gas circuit is connected to the battery; A gas sampling container, the gas sampling container is connected to a gas path of the gas path connecting device, and the gas sampling container is used to obtain a small amount of gas generated by the battery; A gas collection container, the gas collection is connected to a gas path of the gas path connecting device, and the gas collection container is used to obtain the gas generated by the battery.

2. The gas collection device according to claim 1, characterized in that: The gas production collection device also includes a fixing device, which is used to fix the gas path connecting device on the battery.

3. The gas collection device according to claim 2, characterized in that: The fixing device comprises a U-shaped fixing frame, a fixing nut and a fixing washer. The fixing frame and the fixing washer are connected by the fixing nut, and one end of the fixing washer is against the battery.

4. The gas collection device according to claim 3, characterized in that: The fixing gasket is made of metal or plastic.

5. The gas production collection device according to claim 2, characterized in that: The battery has an opening, and a gas path of the gas path connecting device is connected to the opening.

6. The gas collection device according to claim 5, characterized in that: The fixing device also includes a variable diameter air pipe ferrule, which is arranged between the air path connecting device and the battery, and is applied to the openings with different apertures.

7. The gas collection device according to claim 5, characterized in that: The opening is a liquid injection hole.

8. The gas collection device according to claim 1, characterized in that: The gas path connecting device is a stainless steel five-way valve.

9. The gas production collection device according to claim 1, characterized in that: The gas sampling container is an aluminum foil gas sampling bag and / or a negative pressure vacuum glass tube.

10. The gas production collection device according to claim 1, characterized in that: The gas collection container is an aluminum foil gas collection bag and / or a balloon.

11. The gas production collection device according to claim 1, characterized in that: The gas generation and collection device further comprises an air pressure measuring device, which is connected to an air path of the air path connecting device and is used to measure and monitor the internal air pressure of the battery.

12. The gas production collection device according to claim 11, characterized in that: The air pressure measuring device can be a pressure gauge and / or a pressure sensor.

13. The gas collection device according to claim 1, characterized in that: The gas production and collection device also includes a gas pressure regulating device, and the gas pressure regulating device is connected to a gas path of the gas path connecting device.

14. The gas production collection device according to claim 13, characterized in that: The air pressure regulating device is a vacuum pump.

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