Gas circulation lithium battery standing cavity device

Abstract

The utility model discloses a gas circulation lithium battery standing cavity device which comprises a plurality of high-pressure standing cavities, each high-pressure standing cavity is provided with a vacuum pipeline and a positive pressure pipeline, and the plurality of high-pressure standing cavities are connected through exhaust pipelines; the vacuum pipeline is used for pumping out air in the high-pressure standing cavity; the positive-pressure pipeline is used for conveying positive-pressure gas into the high-pressure standing cavity; positive-pressure gas in the high-pressure standing cavities circulates through the exhaust pipeline. The high-pressure standing cavity is vacuumized, positive pressure is applied, and nitrogen is discharged, so that lithium battery standing is realized; and the positive pressure pipeline connected with the other high-pressure standing cavity is arranged on the exhaust pipeline for cyclic utilization of nitrogen, so that the nitrogen production cost is saved, and meanwhile, the exhaust pollution is also reduced. And the high-pressure standing cavity is provided with an anti-explosion valve which is used for releasing pressure when the air pressure in the high-pressure standing cavity is higher than a preset value, so that safety accidents caused by explosion of the high-pressure standing cavity are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery static placement, in particular to a gas circulation lithium battery static placement cavity device. Background Art

[0002] During the manufacturing process of lithium-ion batteries, static conditions play a vital role in the performance of the battery. Negative pressure is repeatedly applied to the battery to expel the residual air in the battery, thereby ensuring that the electrolyte inside the battery is fully infiltrated.

[0003] However, the static device in the prior art still has defects. For example, the existing static device needs to consume a large amount of nitrogen, which consumes huge costs. Secondly, the nitrogen after use will be directly discharged into the outside air, polluting the environment and causing irreversible damage to the human body. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a gas circulation lithium battery static chamber device.

[0005] In order to solve the problems of the prior art, the utility model discloses a gas circulation lithium battery static chamber device, including a plurality of high-pressure static chambers, each of which is provided with a vacuum pipe and a positive pressure pipe, and the plurality of high-pressure static chambers are connected by exhaust pipes; the vacuum pipe is used to extract the air in the high-pressure static chamber; the positive pressure pipe is used to transport the positive pressure gas into the high-pressure static chamber; the positive pressure gas in the plurality of high-pressure static chambers is circulated through the exhaust pipes.

[0006] Optionally, the high-pressure static chamber is provided with an explosion-proof valve.

[0007] Optionally, the high-pressure static chamber is provided with a digital pressure gauge.

[0008] Optionally, the vacuum pipe and / or the positive pressure pipe is provided with a hand valve.

[0009] Optionally, the vacuum pipe and / or the positive pressure pipe is provided with a one-way valve.

[0010] Optionally, the vacuum pipe and / or the positive pressure pipe is provided with a pneumatic valve.

[0011] Optionally, the pneumatic valve is connected to a solenoid valve.

[0012] Optionally, the exhaust duct is provided with a pneumatic valve.

[0013] Optionally, the positive pressure gas is nitrogen.

[0014] Optionally, the vacuum pipe, the positive pressure pipe and the exhaust pipe are combined into a main pipeline connected to the bottom of the high-pressure static chamber.

[0015] The utility model has the beneficial effects:

[0016] 1. The utility model realizes vacuuming, applying positive pressure and discharging nitrogen to the high-pressure static chamber to realize the static state of the lithium battery through three pipelines, namely, a vacuum pipeline, a positive pressure pipeline and an exhaust pipeline; and the nitrogen is recycled by providing the exhaust pipeline with a positive pressure pipeline connected to another high-pressure static chamber, thereby saving the cost of producing nitrogen and reducing exhaust pollution.

[0017] 2. The high-pressure static chamber of the utility model is provided with an explosion-proof valve, which is connected to the interior of the high-pressure static chamber and is used to release pressure when the air pressure inside the high-pressure static chamber is higher than a preset value, so as to prevent the high-pressure static chamber from bursting and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model.

[0019] Figure numerals: 1-first high-pressure static chamber; 2-second high-pressure static chamber; 3-first positive pressure pipeline; 4-first vacuum pipeline; 5-second vacuum pipeline; 6-second positive pressure pipeline; 7-hand valve of the first positive pressure pipeline; 8-hand valve of the first vacuum pipeline; 9-hand valve of the second vacuum pipeline; 10-hand valve of the second positive pressure pipeline; 11-one-way valve of the first positive pressure pipeline; 12-one-way valve of the first vacuum pipeline; 13-one-way valve of the second vacuum pipeline; 14-one-way valve of the second positive pressure pipeline; 15-first A pneumatic valve of a positive pressure pipeline; 16-a pneumatic valve of a first vacuum pipeline; 17-a pneumatic valve of a second vacuum pipeline; 18-a pneumatic valve of a second positive pressure pipeline; 19-a pneumatic valve of an exhaust pipeline; 20-an exhaust pipeline; 21-an explosion-proof valve of a first high-pressure static chamber; 22-an explosion-proof valve of a second high-pressure static chamber; 23-a digital pressure gauge of a first high-pressure static chamber; 24-a digital pressure gauge of a second high-pressure static chamber; 25-a main pipeline of a first high-pressure static chamber; 26-a main pipeline of a first high-pressure static chamber. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0021] The utility model discloses a gas circulation lithium battery static chamber device, which realizes vacuuming of a high-pressure static chamber, applying positive pressure and discharging nitrogen through three pipes, namely, a vacuum pipe, a positive pressure pipe and an exhaust pipe, so as to realize the static state of the lithium battery; and the nitrogen is recycled by providing the exhaust pipe with a positive pressure pipe connected to another high-pressure static chamber; the interior of the high-pressure static chamber has a space for placing a lithium battery liquid injection tray. The vacuum pipe is connected to the high-pressure static cavity, and is used to extract the air in the high-pressure static cavity so that the high-pressure static cavity is in a vacuum state; one end of the positive pressure pipe is connected to the high-pressure static cavity, and the other end is provided with a nitrogen buffer tank, which is used to transport the nitrogen in the nitrogen buffer tank to the high-pressure static cavity so that the high-pressure static cavity is in a positive pressure state; one end of the exhaust pipe is connected to the high-pressure static cavity, and the other end is connected to another high-pressure static cavity, which is used to connect the nitrogen in the exhaust pipe, so that part of the nitrogen is recycled in another high-pressure static cavity; the vacuum pipe and the positive pressure pipe are located above the high-pressure static cavity, and the vacuum pipe, the positive pressure pipe and the exhaust pipe are combined to form a main pipeline, which is bent downward and extends to the bottom of the high-pressure static cavity and is connected to the high-pressure static cavity; the vacuum pipe, the positive pressure pipe and the exhaust pipe are all provided with pneumatic valves, which are connected to the solenoid valve to control the switch of the pneumatic valve through the solenoid valve. The vacuum pipe and the positive pressure pipe are provided with hand valves, which are used to adjust the switch of the hand valve under the action of external force. The vacuum pipe and the positive pressure pipe are both provided with a one-way valve, which is located between the pneumatic valve of the vacuum pipe and the hand valve of the vacuum pipe; the other one-way valve is located between the pneumatic valve of the positive pressure pipe and the hand valve of the positive pressure pipe. The vacuum pipe, the positive pressure pipe and the exhaust pipe are all metal pipes; a digital pressure gauge is provided in the high-pressure static chamber, and the pressure gauge is connected to the interior of the high-pressure static chamber to detect the air pressure inside the high-pressure static chamber. The digital pressure gauge is connected to the interior of the static box to ensure that the battery electrolyte is fully infiltrated. An explosion-proof valve is provided on the high-pressure static chamber, and the explosion-proof valve is connected to the interior of the high-pressure static chamber to relieve pressure when the air pressure inside the high-pressure static chamber is higher than the preset value, so as to prevent the high-pressure static chamber from bursting and causing a safety accident.

[0022] like Figure 1As shown, the number of high-pressure static chambers is two, for example, including a first high-pressure static chamber 1 and a second high-pressure static chamber 2; the pipeline is arranged between the first high-pressure static chamber 1 and the second high-pressure static chamber 2, including a first positive pressure pipeline 3, a first vacuum pipeline 4, a second vacuum pipeline 5, a second positive pressure pipeline 6 and an exhaust pipeline 20; one end of the exhaust pipeline 20 is combined with the first positive pressure pipeline 3 and the first vacuum pipeline 4 to form a pipeline connected to the bottom of the first high-pressure static chamber 1; the other end of the exhaust pipeline 20 is combined with the second vacuum pipeline 5 and the second positive pressure pipeline 6 to form a pipeline connected to the bottom of the second high-pressure static chamber 2. The first high-pressure static chamber 1 and the second high-pressure static chamber 2 are respectively provided with an explosion-proof valve and a digital pressure gauge; the first positive pressure pipeline 3, the first vacuum pipeline 4, the second vacuum pipeline 5, and the second positive pressure pipeline 6 are sequentially provided with a hand valve, a one-way valve and a pneumatic valve from top to bottom; the exhaust pipeline 20 is provided with a pneumatic valve.

[0023] When in use, close the pneumatic valve 15 of the first positive pressure pipeline and the manual valve 7 of the first positive pressure pipeline; close the pneumatic valve 19 of the exhaust pipeline; open the pneumatic valve 16 of the first vacuum pipeline and the manual valve 8 of the first vacuum pipeline; evacuate the first high-pressure static chamber 1 through 4-first vacuum pipeline to make the first high-pressure static chamber 1 reach a vacuum state; close the pneumatic valve 17 of the second vacuum pipeline and the manual valve 9 of the second vacuum pipeline; open the manual valve 10 of the second positive pressure pipeline and the pneumatic valve 18 of the second positive pressure pipeline, and input nitrogen into the second high-pressure static chamber 2 to achieve a positive pressure state of the second high-pressure static chamber 2. Close the hand valve 7 of the first positive pressure pipeline and the pneumatic valve 15 of the first positive pressure pipeline; close the pneumatic valve 16 of the first vacuum pipeline and the hand valve 8 of the first vacuum pipeline; close the hand valve 10 of the second positive pressure pipeline and the pneumatic valve 18 of the second positive pressure pipeline; close the pneumatic valve 17 of the second vacuum pipeline and the hand valve 9 of the second vacuum pipeline; open the pneumatic valve 19 of the exhaust pipeline, and output the nitrogen of the second high-pressure static chamber 2 to the first high-pressure static chamber 1 through the exhaust pipeline. Close the pneumatic valve 19 of the exhaust pipeline, close the pneumatic valve 16 of the first vacuum pipeline and the hand valve 8 of the first vacuum pipeline; open the pneumatic valve 15 of the first positive pressure pipeline and the hand valve 7 of the first positive pressure pipeline, and input nitrogen into the first high-pressure static chamber 1 to supplement the lack of nitrogen pressure in the first high-pressure static chamber 1, so that the nitrogen pressure is at the process requirement value; so as to achieve the positive pressure state of the first high-pressure static chamber 1. In the reverse direction, the lithium battery cycle static is completed in this cycle, and the secondary utilization of nitrogen is completed.

[0024] Close the pneumatic valve 19 of the exhaust pipe, open the pneumatic valve 17 of the second vacuum pipe and the manual valve 9 of the second vacuum pipe; close the pneumatic valve 17 of the second vacuum pipe and the manual valve 9 of the second vacuum pipe, and evacuate the second high-pressure static chamber 2 through the second vacuum pipe 5, so that the vacuum pressure of the second high-pressure static chamber 2 is at the value required by the process; so as to achieve the vacuum state of the second high-pressure static chamber 2.

[0025] Close the pneumatic valve 19 of the exhaust pipe, close the pneumatic valve 15 of the first positive pressure pipe and the manual valve 7 of the first positive pressure pipe; open the pneumatic valve 16 of the first vacuum pipe and the manual valve 8 of the first vacuum pipe, and evacuate the first high-pressure static chamber 1 through the first vacuum pipe 4 to make the first high-pressure static chamber 1 reach a vacuum state.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element 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. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gas circulation lithium battery static chamber device, characterized in that: It comprises a plurality of high-pressure static chambers, each of which is provided with a vacuum pipe and a positive-pressure pipe, and the plurality of high-pressure static chambers are connected by exhaust pipes; the vacuum pipe is used to extract the air in the high-pressure static chamber; the positive-pressure pipe is used to transport the positive-pressure gas into the high-pressure static chamber; the positive-pressure gas in the plurality of high-pressure static chambers circulates through the exhaust pipes.

2. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The high-pressure static chamber is provided with an explosion-proof valve.

3. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The high-pressure static chamber is provided with a digital pressure gauge.

4. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The vacuum pipeline and / or the positive pressure pipeline is provided with a hand valve.

5. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The vacuum pipeline and / or the positive pressure pipeline is provided with a one-way valve.

6. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The vacuum pipeline and / or the positive pressure pipeline is provided with a pneumatic valve.

7. The gas circulation lithium battery static chamber device according to claim 6, characterized in that: The pneumatic valve is connected to the solenoid valve.

8. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The exhaust pipe is provided with a pneumatic valve.

9. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The positive pressure gas is nitrogen.

10. The gas circulation lithium battery static chamber device according to claim 1, characterized in that: The vacuum pipeline, the positive pressure pipeline and the exhaust pipeline are combined into a main pipeline connected to the bottom of the high-pressure static chamber.

Images