Liquid and helium injection device

Abstract

The utility model discloses a kind of liquid injection helium injection device, comprising: buffer tank, buffer tank surface is equipped with the first inlet and outlet and second inlet and outlet being communicated with its inner cavity;First pipeline, first pipeline and the first inlet and outlet of buffer tank are communicated;Vacuumizing assembly and gas supply assembly, vacuumizing assembly and gas supply assembly are communicated with first pipeline respectively;Second pipeline, second pipeline and the second inlet and outlet of buffer tank are communicated, one end of second pipeline departing from buffer tank is used to connect battery.Through the above technical scheme, the device is provided with the buffer tank for storing electrolyte, when vacuumizing assembly executes vacuumizing operation, electrolyte is temporarily stored in buffer tank by vacuum suction, so as to avoid that electrolyte enters vacuum pipeline and causes blockage, effectively improve production efficiency.When gas supply assembly is helium injection for battery, electrolyte in buffer tank is pressed into battery, to ensure the accurate proportioning of electrolyte in battery, guarantee the overall performance of lithium ion battery.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, specifically a liquid-filling and helium-filling device. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, secondary electrolyte filling is a crucial step. In existing technologies, during the secondary electrolyte filling process, the vacuuming and gas supply components are prone to drawing electrolyte into the vacuum pipes during the vacuuming operation, causing blockages. This not only leads to electrolyte loss inside the battery, affecting battery performance, but also disrupts normal production processes and reduces production efficiency due to pipe blockage. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a liquid electrolyte and helium injection device. This device includes a buffer tank for storing the electrolyte. When the vacuuming component performs a vacuuming operation, the electrolyte drawn out by the vacuum can be temporarily stored in the buffer tank, thereby preventing electrolyte from entering the vacuum pipes and causing blockages, effectively improving production efficiency. When the gas supply component injects helium into the battery, the electrolyte in the buffer tank is also forced into the battery, ensuring the precise ratio of electrolyte inside the battery and guaranteeing the overall performance of the lithium-ion battery.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a liquid helium injection device, comprising: A buffer container, the surface of which is provided with a first inlet and a second inlet communicating with its internal cavity; A first pipe, which is connected to the first inlet and outlet of the buffer tank; A vacuum pumping assembly, which is connected to the first pipeline; A gas supply assembly, which is connected to the first pipeline; The second pipe is connected to the second inlet and outlet of the buffer tank, and the end of the second pipe opposite to the buffer tank is used to connect to the battery.

[0005] Through the above technical solution, the device is equipped with a buffer tank for storing electrolyte. When the vacuuming component performs a vacuuming operation, the electrolyte drawn out by the vacuum can be temporarily stored in the buffer tank, thereby preventing electrolyte from entering the vacuum pipeline and causing blockage, effectively improving production efficiency. When the gas supply component injects helium into the battery, the electrolyte in the buffer tank is also forced into the battery, thereby ensuring the precise ratio of electrolyte inside the battery and guaranteeing the overall performance of the lithium-ion battery.

[0006] Furthermore, the vacuuming assembly includes a first branch pipe connected to the first pipeline, and the first branch pipe is connected to a vacuum pump. The vacuum pump is used to perform a vacuuming operation on the battery. During the vacuuming process, the electrolyte drawn up by the negative pressure enters the buffer tank, thereby preventing electrolyte from entering the vacuum tube and causing blockage.

[0007] Furthermore, the gas supply assembly includes a second branch pipe connected to the first pipe, and the second branch pipe is connected to a helium supply device. After the vacuuming process is completed, the helium supply device injects helium into the battery, and during the helium injection process, it also injects electrolyte from the buffer tank into the battery.

[0008] Furthermore, a first valve is installed on the first branch pipe, located between the vacuum pump and the buffer tank; a second valve is installed on the second branch pipe, located between the helium supply device and the buffer tank. The first valve allows for precise maintenance of the pressure range, ensuring the stability of the vacuum environment. The second valve allows for control of the helium flow rate.

[0009] Furthermore, a pressure gauge is connected to the second pipe, which is used to detect the vacuum level inside the battery.

[0010] Furthermore, the buffer tank has at least two, and the first pipe is connected to the first inlet and outlet of each of the buffer tanks respectively; A third valve is provided on each of the second pipes.

[0011] The above technical solution allows for simultaneous secondary electrolyte filling of multiple batteries. Each buffer tank can correspond to one battery, and the operation of the pipeline containing the buffer tank corresponding to that third valve can be controlled by controlling the opening and closing of the third valve.

[0012] Furthermore, it also includes a recovery tank. The inner cavity of the buffer tank and the inner cavity of the recovery tank are connected by a fourth branch pipe, which is equipped with a fourth valve. Opening the fourth valve allows the residual electrolyte in the buffer tank to flow into the recovery tank for unified treatment.

[0013] Furthermore, the first pipeline is also connected to a third branch pipe, which is connected to a nitrogen supply device and equipped with a fifth valve. Nitrogen is supplied through the nitrogen supply device to purge the buffer tank, causing the residual electrolyte inside the buffer tank to flow.

[0014] Furthermore, the surface of the recovery tank is provided with at least one third inlet / outlet communicating with its internal cavity. The third inlet / outlet is connected to a third pipe, which is connected to a second vacuum pump. A vacuum valve is installed on the third pipe, located between the second vacuum pump and the recovery tank. The second vacuum pump provides a negative pressure environment for the recovery tank to draw residual electrolyte from the buffer tank into the recovery tank.

[0015] Based on the above technical solution, the beneficial effects of this utility model are as follows: The liquid injection and helium injection device disclosed in this application is equipped with a buffer tank for storing electrolyte. When the vacuuming component performs a vacuuming operation, the electrolyte drawn out by the vacuum can be temporarily stored in the buffer tank, thereby preventing the electrolyte from entering the vacuum pipeline and causing blockage, and effectively improving production efficiency. When the gas supply component fills the battery with helium, it also presses the electrolyte in the buffer tank into the battery, thereby ensuring the precise ratio of electrolyte inside the battery and guaranteeing the overall performance of the lithium-ion battery.

[0016] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the liquid injection and helium injection device in an embodiment of this utility model; Figure 2 This is a schematic diagram of the liquid injection and helium injection device with a recovery tank in an embodiment of this utility model.

[0019] The reference numerals in the above figures are as follows: 1. Buffer tank; 2. First pipe; 31. First branch pipe; 32. Vacuum pump; 33. First valve; 41. Second branch pipe; 42. Helium supply device; 43. Second valve; 51. Third branch pipe; 52. Nitrogen supply device; 53. Fifth valve; 6. Second pipe; 61. Third valve; 62. Pressure gauge; 7. Battery; 8. Recovery tank; 81. Fourth branch pipe; 82. Fourth valve; 83. Third pipe; 84. Vacuum valve. Detailed Implementation

[0020] 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.

[0021] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] Example: This example discloses a liquid helium injection device, comprising: A buffer container 1 has a first inlet and a second inlet on its surface, communicating with its internal cavity. The first outlet of the buffer container 1 is connected to a first pipe 2, and the second inlet and outlet are connected to a second pipe 6. One end of the second pipe 6 facing away from the buffer container 1 is used to connect to the internal cavity of a battery 7. The first pipe 2 has a first end and a second end, as shown... Figure 1 As shown, this application provides two buffer containers 1, which are connected in parallel at the first end of the first pipe 2.

[0023] In some feasible embodiments, the number of the buffer tanks 1 is set according to actual needs.

[0024] The battery 7 liquid-filling and helium-filling device also includes a vacuum pumping component and a gas supply component. The vacuum pumping component and the gas supply component are connected in parallel at the second end of the first pipe 2.

[0025] The vacuuming assembly includes a first branch pipe 31 connected to the first pipe 2, with a vacuum pump 32 connected to the side of the first branch pipe 31 facing away from the first pipe 2. A first valve 33 is connected to the first branch pipe 31; by opening and closing the first valve 33, the vacuuming assembly is controlled to perform a vacuuming operation on the battery 7. It should be noted that during the vacuuming process, the electrolyte drawn up by the negative pressure will enter the buffer tank 1, thereby preventing electrolyte from entering the vacuum tube and causing blockage.

[0026] A pressure gauge 62 is connected to the second pipe 6. While the vacuum assembly is working, the pressure gauge 62 detects the vacuum level inside the battery 7 in real time. When the vacuum level reaches a preset value, the first valve 33 is closed.

[0027] The gas supply assembly includes a second branch pipe 41 connected to the first pipe 2. The side of the second branch pipe 41 opposite to the first pipe 2 is connected to a helium supply device 42, and a second valve 43 is connected to the second branch pipe 41. After the vacuuming assembly completes its vacuuming operation, the gas supply assembly is controlled to perform a helium filling operation for the battery 7 by opening and closing the second valve 43. During the helium filling process, the electrolyte in the buffer tank 1 is also pumped into the battery 7.

[0028] One end of the second pipe 6 is connected to the second outlet of the buffer tank 1, and the other end of the second pipe 6 is used to connect to the inner cavity of the battery 7. This application provides two buffer tanks 1, and the second inlet and outlet of each buffer tank 1 are connected to a second pipe 6. A third valve 61 is connected to each second pipe 6, and the operation of the pipeline containing the third valve 61 can be controlled by opening and closing the third valve 61.

[0029] It should be noted that the first valve 33, the second valve 43, and the third valve 61 mentioned above are all vacuum valves. These vacuum valves employ a special sealing design, such as metal or graphite seals, to effectively prevent gas leakage and ensure stability and reliability in high vacuum environments. They are used to precisely maintain the pressure range and guarantee the stability of the vacuum environment.

[0030] The above-described method connects the liquid helium injection device and connects the end of the second pipe 6 away from the buffer tank 1 to the inner cavity of the battery 7. The liquid helium injection steps are as follows: Based on the connection status of battery 7 and second pipe 6, the corresponding third valve 61 is opened, and the first valve 33 is opened, activating the vacuum pump 32 to perform a vacuuming operation on battery 7. When the pressure gauge 62 detects that the vacuum level inside battery 7 reaches a preset value, the first valve 33 is closed. During the vacuuming process, the electrolyte inside the battery flows into the buffer tank 1 along the second pipe 6 under the influence of negative pressure, thereby preventing electrolyte from entering the vacuum pipe and causing blockage, effectively improving production efficiency. Opening the second valve 43 activates the helium supply device 42, initiating the helium injection operation for the battery. It should be noted that the electrolyte in battery 7 is prepared according to a fixed ratio, which must be strictly adhered to during production, following the battery design requirements. In this application, during the helium injection process, the helium gas, passing through the buffer tank 1, forces the electrolyte within 1 back into the inner cavity of battery 7, ensuring a precise electrolyte ratio within battery 7 and guaranteeing the overall performance of the lithium-ion battery. After the helium injection operation is complete, all valves are closed.

[0031] In some feasible embodiments, the liquid helium injection device further includes a recovery tank 8, such as Figure 2 As shown, the inner cavity of the buffer tank 1 and the inner cavity of the recovery tank 8 are connected by a fourth branch pipe 81, which is connected to the second pipe 6. A fourth valve 82 is provided on the fourth branch pipe 81. Opening the fourth valve 82 connects the inner cavities of the buffer tank 1 and the recovery tank 8, allowing residual electrolyte in the buffer tank 1 to flow into the recovery tank 8 for unified treatment.

[0032] The surface of the recovery tank 8 is provided with two third inlets and outlets that connect to its internal cavity. These third inlets and outlets are connected to a third pipe 83, which in turn connects to a second vacuum pump. A vacuum valve 84 is installed on the third pipe, located between the second vacuum pump and the recovery tank 8. The second vacuum pump provides a negative pressure environment for the recovery tank 8 to draw residual electrolyte from the buffer tank 1 into the recovery tank.

[0033] The first pipe 2 is also connected to a third branch pipe 51. The end of the third branch pipe 51 opposite to the first pipe 2 is connected to a nitrogen supply device 52. A fifth valve 53 is connected to the third branch pipe 51. By opening and closing the fifth valve 53, the nitrogen supply device 52 is controlled to operate, so that the electrolyte remaining in the buffer tank 1 flows into the recovery tank 8. Before the next round of battery refilling, the device is cleaned using the above technical solution to prevent the electrolyte from the previous round of batteries from entering the next round of batteries.

[0034] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A liquid helium injection device, characterized in that, include: A buffer container, the surface of which is provided with a first inlet and a second inlet communicating with its internal cavity; A first pipe, which is connected to the first inlet and outlet of the buffer tank; A vacuum pumping assembly, which is connected to the first pipeline; A gas supply assembly, which is connected to the first pipeline; The second pipe is connected to the second inlet and outlet of the buffer tank, and the end of the second pipe opposite to the buffer tank is used to connect to the battery.

2. The liquid helium injection device as described in claim 1, characterized in that, The vacuum assembly includes a first branch pipe connected to the first pipe, and the first branch pipe is connected to a vacuum pump.

3. The liquid helium injection device as described in claim 2, characterized in that, The gas supply assembly includes a second branch pipe connected to the first pipeline, and the second branch pipe is connected to a helium supply device.

4. The liquid helium injection device as described in claim 3, characterized in that, A first valve is provided on the first branch pipe, and the first valve is located between the vacuum pump and the buffer tank. A second valve is provided on the second branch pipe, and the second valve is located between the helium supply device and the buffer tank.

5. The liquid helium injection device as described in claim 1, characterized in that, A pressure gauge is connected to the second pipe, and the pressure gauge is used to detect the vacuum level inside the battery.

6. The liquid helium injection device as described in claim 1, characterized in that, The buffer tank has at least two, and the first pipe is connected to the first inlet and outlet of each of the buffer tanks respectively; Each of the buffer tanks has a second inlet and outlet connected to a second pipe, and each of the second pipes is provided with a third valve.

7. The liquid helium injection device as described in claim 6, characterized in that, It also includes a recycling tank, the inner cavity of the buffer tank and the inner cavity of the recycling tank are connected by a fourth branch pipe, and a fourth valve is provided on the fourth branch pipe.

8. The liquid helium injection device as described in claim 7, characterized in that, The first pipeline is also connected to a third branch pipe, which is connected to a nitrogen supply device and is equipped with a fifth valve.

9. The liquid helium injection device as described in claim 8, characterized in that, The surface of the recycling tank is provided with at least one third inlet / outlet that communicates with its inner cavity. The third inlet / outlet is connected to a third pipe, which is connected to a second vacuum pump. A vacuum valve is provided on the third pipe, and the vacuum valve is located between the second vacuum pump and the recycling tank.

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