Battery standing system

Abstract

The utility model discloses a battery standing system, which comprises at least two standing tanks used for placing battery cells; the main gas supply module is respectively communicated with each standing tank and is used for conveying nitrogen to each standing tank; the exhaust module is respectively communicated with each standing tank and is used for discharging the nitrogen in each standing tank into air; the recovery module is respectively communicated with each standing tank and is used for receiving nitrogen discharged from each standing tank; the vacuum module is respectively communicated with each standing tank and is used for vacuumizing each standing tank; and the communicating pipeline is communicated between the recycling modules of every two standing tanks and is used for realizing nitrogen conveying between every two standing tanks. According to the battery standing system disclosed by the utility model, the communication pipeline is arranged between every two adjacent standing tanks, so that the utilization rate of gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery standing system. Background Art

[0002] During the production and manufacturing process of lithium-ion batteries, there is a process of liquid injection and standing. After liquid injection, through repeated pressurization and vacuum pumping, the electrolyte is fully infiltrated in the wound core. When pressurizing the inside of the battery cell, nitrogen is filled to increase the pressure inside the battery cell.

[0003] When a pressurization process is completed, first, the nitrogen in the standing tank is recovered through the recovery tank. After the pressures of the recovery tank and the standing tank reach equilibrium, the remaining nitrogen in the standing tank is discharged. However, due to the air pressure in the recovery tank itself, the utilization rate of the nitrogen discharged from the standing tank is low, resulting in excessive waste. Summary of the Utility Model

[0004] To solve at least one of the problems existing in the above prior art, according to one aspect of the present utility model, a battery standing system is provided, including: at least two standing tanks for placing battery cells; a main gas supply module respectively connected to each of the standing tanks for supplying nitrogen to each of the standing tanks; an exhaust module respectively connected to each of the standing tanks for discharging the nitrogen in each of the standing tanks into the air; a recovery module respectively connected to each of the standing tanks for receiving the nitrogen discharged from each of the standing tanks; a vacuum module respectively connected to each of the standing tanks for evacuating each of the standing tanks; at least one connecting pipe connecting the recovery modules of every two of the standing tanks for realizing the nitrogen transfer between every two of the standing tanks.

[0005] In some embodiments, the battery standing system further includes at least one first pneumatic ball valve provided on the connecting pipe.

[0006] In some embodiments, the battery standing system further includes an auxiliary gas supply module connected to the recovery module for supplying nitrogen to the recovery module.

[0007] In some embodiments, the auxiliary gas supply module includes an auxiliary gas storage tank and a one-way valve provided between the auxiliary gas storage tank and the recovery module for realizing the conduction in the direction from the auxiliary gas storage tank to the recovery module.

[0008] In some embodiments, the recovery module includes a recovery tank, a main recovery pipeline, and at least two recovery branch pipelines. One of the recovery branch pipelines is arranged corresponding to one of the static tanks, and each is connected between the main recovery pipeline and one of the static tanks, and the main recovery pipeline is connected to the recovery tank;

[0009] The recovery module further includes a first filter, and the first filter is arranged in the main recovery pipeline.

[0010] In some embodiments, the recovery module further includes a pressure sensor, and the pressure sensor is arranged in the main recovery pipeline for detecting the pressure of the main recovery pipeline.

[0011] In some embodiments, the recovery module further includes a flowmeter, and the flowmeter is arranged in the main recovery pipeline for detecting the gas flow rate flowing into the recovery tank through the main recovery pipeline.

[0012] In some embodiments, the recovery module further includes a second pneumatic ball valve, and the second pneumatic ball valve is arranged in the main recovery pipeline for opening or closing the main recovery pipeline.

[0013] In some embodiments, the battery static system further includes at least two second filters, and one of the second filters is arranged on the inlet and outlet pipelines of each static tank.

[0014] In some embodiments, the battery static system further includes at least two mufflers, and one of the mufflers is arranged corresponding to the inlet and outlet of one of the static tanks.

[0015] In summary, the battery static system provided by the present utility model has the following technical effects:

[0016] The main air supply module is used to supply nitrogen to the static tank, the recovery module is used to recover the nitrogen discharged from the static tank, and the vacuum module is used to evacuate the static tank, so as to realize the continuous cycle process of pressurizing and vacuumizing the static tank. And the recovery modules between adjacent static tanks are connected through a communication pipeline. Thus, when one static tank needs to release pressure in a high-pressure state and another static tank needs to be pressurized in an atmospheric pressure state, the high-pressure static tank can exhaust gas to the atmospheric pressure static tank. Since the air pressure in the static tank is relatively lower than that in the recovery tank, the recovery tank can receive the gas discharged from the static tank. In this way, the process of making full use of the gas is achieved, the utilization rate of the gas is improved, and the production cost is reduced. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the battery static system according to an embodiment of the present utility model.

[0018] Attached drawings: 100 - Battery standing system, 10 - Standing tank, 11 - In - out pipeline, 20 - Connecting pipeline, 30 - Main gas supply module, 31 - Main gas storage tank, 32 - Main gas supply pipeline, 33 - Branch gas supply pipeline, 34 - Booster pump, 40 - Exhaust module, 41 - Main exhaust pipeline, 42 - Branch exhaust pipeline, 50 - Recovery module, 51 - Recovery tank, 52 - Main recovery pipeline, 53 - Branch recovery pipeline, 54 - First filter, 55 - Pressure sensor, 56 - Flowmeter, 57 - Second pneumatic ball valve, 60 - Vacuum module, 61 - Buffer tank, 62 - Main vacuum pipeline, 63 - Branch vacuum pipeline, 70 - First pneumatic ball valve, 80 - Auxiliary gas supply module, 81 - Auxiliary gas storage tank, 82 - Check valve, 90 - Second filter, 200 - Third pneumatic ball valve, 300 - Muffler. Detailed implementation manners

[0019] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the attached drawings in the embodiments of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is 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 thus should not be construed as a limitation to the present utility model.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0022] The present utility model will be further described in detail below in conjunction with the attached drawings.

[0023] Please refer to Figure 1 , which is the battery standing system 100 provided by the embodiment of the present utility model, including at least two standing tanks 10, a connecting pipeline 20, a main gas supply module 30, an exhaust module 40, a recovery module 50, and a vacuum module 60.

[0024] Among them, the static tanks 10 are arranged in parallel, and the static tanks 10 are used to place the battery cells; the main gas supply module 30 is respectively connected to each static tank 10 and is used to convey nitrogen to each static tank 10; the exhaust module 40 is respectively connected to each static tank 10 and is used to discharge the nitrogen in each static tank 10 into the air; the recovery module 50 is respectively connected to each static tank 10 and is used to receive the nitrogen discharged from each static tank 10; the vacuum module 60 is respectively connected to each static tank 10 and is used to evacuate each static tank 10; at least one connecting pipe 20, and the connecting pipe 20 is connected between the recovery modules 50 of every two static tanks 10 and is used to realize the nitrogen conveyance between every two static tanks 10.

[0025] For the above battery static system 100, nitrogen is provided to the static tank 10 through the main gas supply module 30, the nitrogen discharged from the static tank 10 is recovered through the recovery module 50, and the static tank 10 is evacuated through the vacuum module 60, so as to realize the continuous cycle process of pressurizing and vacuumizing the static tank 10. And by connecting the recovery modules 50 between adjacent static tanks 10 through the connecting pipe 20, when a static tank 10 is in a high-pressure state and needs to relieve pressure and another static tank 10 is in an atmospheric pressure state and needs to be pressurized, the high-pressure static tank 10 can be exhausted to the atmospheric-pressure static tank 10. Since the air pressure in the static tank 10 is relatively lower than the air pressure in the recovery tank 51 in the 50, the gas discharged from the static tank 10 can be received. In this way, the process of making full use of the gas is achieved, the utilization rate of the gas is improved, and the production cost is reduced.

[0026] Among them, when the connecting pipe 20 of this embodiment connects the static tanks 10, it is connected between every two adjacent static tanks 10 to facilitate the connection and assembly of the connecting pipe 20 and the static tanks 10. In other embodiments, it can be used to connect the spaced-apart static tanks 10 as needed, which is not limited here.

[0027] Among them, please refer to Figure 1 , the static tank 10 of this embodiment is connected with an inlet and outlet pipe 11, and the inlet and outlet pipe 11 is respectively connected to the main gas supply module 30, the exhaust module 40, the recovery module 50 and the vacuum module 60 through a multi-inlet and outlet valve.

[0028] The recovery module 50 of this embodiment includes a recovery tank 51, a main recovery pipe 52, and at least two branch recovery pipes 53. Each branch recovery pipe 53 corresponds to a standing tank 10, and each branch recovery pipe 53 is connected between the main recovery pipe 52 and a recovery tank 51. The main recovery pipe 52 is connected to the recovery tank 51. Thus, when nitrogen needs to be recovered, it flows through the inlet and outlet pipes 11 to the branch recovery pipes 53, which then flow to the main recovery pipe 52. The main recovery pipe 52 then flows into the recovery tank 51, thereby recovering the nitrogen in the recovery tank 51 for future use.

[0029] Furthermore, in order to ensure the purity of the nitrogen gas source in the recovery tank 51 and to ensure the electrolyte stillness effect when it is used again later, the battery rest system 100 also includes an auxiliary gas supply module 80. The auxiliary gas supply module 80 is connected to the recovery module 50 and is used to deliver nitrogen to the recovery module 50. Specifically, it is connected to the recovery tank 51 and can add sufficient nitrogen to the recovery tank 51 so that the nitrogen in the recovery tank 51 can have sufficient purity, thereby facilitating the next use of the nitrogen in the recovery tank 51.

[0030] In addition, since the gas will bring out the electrolyte from the static tank 10 when it is recovered, in order to recycle the electrolyte, the recovery module 50 also includes a first filter 54. The first filter 54 is arranged in the recovery main pipeline 52. In this way, when the nitrogen is recovered, the nitrogen flowing out of the static tank 10 can be filtered, so that the electrolyte and nitrogen can be separated as much as possible, ensuring the purity of the recovered nitrogen and facilitating the recycling of the electrolyte.

[0031] Specifically, the auxiliary gas supply module 80 includes an auxiliary gas storage tank 81 and a one-way valve 82. The one-way valve 82 is arranged between the auxiliary gas storage tank 81 and the recovery module 50. That is, by providing the one-way valve 82, the gas in the auxiliary gas storage tank 81 can only flow in one direction to the recovery tank 51, thereby preventing the gas in the recovery tank 51 from flowing back into the auxiliary gas storage tank 81.

[0032] Among them, the main gas supply module 30 includes a main gas storage tank 31, a main gas supply pipe 32 and at least two branch gas supply pipes 33. A branch gas supply pipe 33 and a static tank 10 are arranged one by one, and each is connected between the main gas supply pipe 32 and a main gas storage tank 31. The main gas supply pipe 32 is connected to the main gas storage tank 31, so that nitrogen is stored through the main gas storage tank 31. When the static tank 10 needs to be pressurized, nitrogen is introduced through the main gas storage tank 31 to achieve pressurization.

[0033] It is understandable that, depending on the pressure of the factory gas source, the main gas supply module 30 may also include a booster pump 34 , which is connected between the factory gas source port and the main gas storage tank 31 so as to be able to deliver gas with sufficient pressure to the main gas storage tank 31 .

[0034] Among them, the vacuum module 60 includes a buffer tank 61, a main vacuum pipeline 62, and at least two vacuum branch pipelines 63. One vacuum branch pipeline 63 is arranged in one-to-one correspondence with one standing tank 10, and each is connected between the main vacuum pipeline 62 and one standing tank 10. The main vacuum pipeline 62 is connected to the buffer tank 61. Thus, when the standing tank 10 needs to be evacuated, the state between the vacuum source of the factory and the buffer tank 61 can be first set to a vacuum state to increase the pipeline length during subsequent evacuation of the standing tank 10, thereby improving the evacuation efficiency.

[0035] It can be understood that in order to ensure that during the process of the high-pressure standing tank 10 exhausting gas to the recovery tank 51, nitrogen does not enter the connecting pipeline 20 too much at the same time, causing gas residue in the connecting pipeline 20, the battery standing system 100 further includes at least one first pneumatic ball valve 70. The first pneumatic ball valve 70 is arranged in the connecting pipeline 20. Thus, through the setting of the first pneumatic ball valve 70, the opening and closing of the connecting pipeline 20 can be controlled by the first pneumatic ball valve 70, avoiding gas entering the connecting pipeline 20 and causing excessive residue when the high-pressure standing tank 10 exhausts gas through the recovery tank 51.

[0036] Please refer to Figure 1 , in an embodiment of the present invention, in order to protect the recovery module 50, the recovery module 50 further includes a pressure sensor 55. The pressure sensor 55 is arranged in the main recovery pipeline 52. The pressure sensor 55 is used to detect the pressure of the main recovery pipeline 52. In this way, through the setting of the pressure sensor 55, the pressure of the gas flowing through the main recovery pipeline 52 is monitored in real time, avoiding the risk of explosion that may occur due to excessive pressure in the main recovery pipeline 52 when the gas discharge speed is too fast.

[0037] Furthermore, the recovery module 50 further includes a flow meter 56. The flow meter 56 is arranged in the main recovery pipeline 52. The flow meter 56 is used to detect the gas flow rate flowing into the recovery tank 51 through the main recovery pipeline 52. In this way, the amount of gas flowing through the main recovery pipeline 52 is monitored by the flow meter 56 to determine whether the amount of gas flowing out reaches a preset recovery value.

[0038] In addition, the recovery module 50 of this embodiment further includes a second pneumatic ball valve 57. The second pneumatic ball valve 57 is arranged in the main recovery pipeline 52 and is used to open or close the main recovery pipeline 52. In this way, by opening or closing the main recovery pipeline 52 through the second pneumatic ball valve 57, it is avoided that when gas needs to flow into the connecting pipeline 20, it is discharged through the main recovery pipeline 52, ensuring the pressure relief and pressurization effects between adjacent two standing tanks 10.

[0039] Among them, the exhaust module 40 of this embodiment includes an exhaust main pipeline 41 and an exhaust branch pipeline 42. The exhaust branch pipeline 42 is connected to the static tank 10, and is used to direct the gas in the static tank 10 to the exhaust main pipeline 41, and discharge it into the air through the exhaust main pipeline 41.

[0040] Among them, in order to avoid excessive residue of gas in the recovery branch pipeline 53, the air supply branch pipeline 33, the vacuum branch pipeline 63 and the exhaust branch pipeline 42, a third pneumatic ball valve 200 is provided on each of the recovery branch pipeline 53, the air supply branch pipeline 33, the vacuum branch pipeline 63 and the exhaust module 40, so as to control the recovery module 50, the vacuum module 60 and the exhaust module 40 respectively through each pneumatic ball valve.

[0041] Please refer to Figure 1 , in an embodiment of the present utility model, in order to ensure the purity of nitrogen entering or flowing in or out of the static tank 10, the battery static system 100 further includes at least two second filters 90. A second filter 90 is provided on the inlet and outlet pipeline 11 of each static tank 10. In this way, when the nitrogen in the static tank 10 flows out, it first passes through the second filter 90 for filtration, so that the electrolyte can be recovered, and at the same time, it is avoided that when the nitrogen is recovered to the recovery tank 51 or the buffer tank 61, too much nitrogen flows into the recovery tank 51 or the buffer tank 61; or when the nitrogen in the recovery tank 51 or the buffer tank 61 needs to enter the static tank 10, it is filtered by the second filter 90 again, thereby ensuring the purity of the nitrogen entering the static tank 10.

[0042] Furthermore, the battery static system 100 further includes at least two mufflers 300. One muffler 300 is arranged corresponding to the inlet and outlet of one static tank 10 respectively. Thus, by setting the muffler 300, the noise generated when entering and leaving the static tank 10 can be reduced, and the environmental sound pollution can be avoided.

[0043] Among them, the usage mode of the connecting pipeline 20 of this embodiment is as follows. For the convenience of description, it is assumed that this embodiment includes two static tanks 10, the two static tanks 10 are respectively a first tank body and a second tank body, and it is assumed that the first tank body is in a high-pressure state, and the second tank body is in an atmospheric pressure state and needs to be pressurized. The initial pressure of the first tank body is P1, the volume is V, the volume of the second tank body is also V, the volume V0 of the recovery tank 51 = 3V, and it is assumed that P1 = 0.8MP;

[0044] (1) When the first tank body relieves pressure on the second tank body through the connecting pipeline 20 and the pressure of both is in an equilibrium state, the pressure is P2. At this time, that is, P2 = P1 / 2 = 0.8 / 2 = 0.4Mpa. Therefore, the volume of the gas discharged from the first tank body is (P1 - P2) / 0.1 = 4m3, and the recovery rate = 4m3 / 8m3 * 100% = 50%;

[0045] (2) When the high-pressure first tank is directly discharged through the recovery module 50, in order to improve the gas recovery rate, the volume of the recovery tank 51 needs to be set larger than the volume of the static tank 10, and the recovery tank 51 has an initial pressure. Assuming the initial pressure is P2 and the initial pressure is 0.4 MPa, and the pressure after the first tank discharges gas into the recovery tank 51 is P3, then at the initial state, P1V + P2V0 = P3 * (V + V0). After the discharge is completed, the amount of gas discharged from the first tank is (P1 - P3) / 0.1 = 3 m3. At this time, the gas recovery rate is 0.3 / 0.8 * 100% = 37.5%. This recovery rate is less than the method of mutual gas discharge between the two static tanks 10 in the above method.

[0046] (3) After the high pressure in the first tank is discharged to the second tank through the connecting pipe 20, the remaining large amount of nitrogen gas is discharged into the air through the exhaust module 40, and then vacuumized through the vacuum module 60. In this way, the first tank realizes a process of one-time pressurization and vacuumization.

[0047] In summary, in this embodiment, by setting the connecting pipe 20 between the static tanks 10, the gas recovery rate is improved, thereby reducing the production cost of the factory.

[0048] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. Battery static system (100), characterized in that Comprising: At least two static tanks (10) for placing battery cells; A main gas supply module (30) connected to each of the static tanks (10) respectively for supplying nitrogen gas to each of the static tanks (10); An exhaust module (40) connected to each of the static tanks (10) respectively for discharging the nitrogen gas in each of the static tanks (10) into the air; A recovery module (50) connected to each of the static tanks (10) respectively for receiving the nitrogen gas discharged from each of the static tanks (10); A vacuum module (60) connected to each of the static tanks (10) respectively for evacuating each of the static tanks (10); At least one connecting pipe (20) connecting the recovery modules (50) between every two of the static tanks (10) for realizing the nitrogen gas transportation between every two of the static tanks (10).

2. The battery standing system (100) according to claim 1, characterized in that, The battery static system (100) further includes at least one first pneumatic ball valve (70) disposed on the connecting pipe (20).

3. The battery standing system (100) according to claim 1 or 2, characterized in that, The battery static system (100) further includes an auxiliary gas supply module (80) connected to the recovery module (50) for supplying nitrogen gas to the recovery module (50).

4. The battery static system (100) according to claim 3, characterized in that, The auxiliary gas supply module (80) includes an auxiliary gas storage tank (81) and a one-way valve (82) disposed between the auxiliary gas storage tank (81) and the recovery module (50) for realizing the conduction in the direction from the auxiliary gas storage tank (81) to the recovery module (50).

5. The battery static system (100) according to claim 1 or 2, characterized in that The recovery module (50) includes a recovery tank (51), a recovery main pipe (52) and at least two recovery branch pipes (53). One of the recovery branch pipes (53) corresponds to one of the static tanks (10) respectively and is connected between the recovery main pipe (52) and one of the static tanks (10). The recovery main pipe (52) is connected to the recovery tank (51); The recovery module (50) further includes a first filter (54) disposed on the recovery main pipe (52).

6. The battery static system (100) according to claim 5, characterized in that, The recovery module (50) further includes a pressure sensor (55) disposed on the recovery main pipe (52) for detecting the pressure of the recovery main pipe (52).

7. The battery standing system (100) according to claim 5, characterized in that, The recovery module (50) further includes a flow meter (56) disposed on the recovery main pipe (52) for detecting the gas flow rate flowing into the recovery tank (51) through the recovery main pipe (52).

8. The battery static system (100) according to claim 5, characterized in that, The recovery module (50) further includes a second pneumatic ball valve (57) disposed on the recovery main pipe (52) for opening or closing the recovery main pipe (52).

9. The battery standing system (100) according to any one of claims 1, 2, or 6 - 8, characterized in that, The battery standing system (100) further includes at least two second filters (90), and one of the second filters (90) is provided on the inlet and outlet pipes (11) of each of the standing tanks (10).

10. The battery static system (100) according to any one of claims 1, 2, or 6-8, characterized in that, The battery standing system (100) further includes at least two mufflers (300), and one of the mufflers (300) is arranged corresponding to the inlet and outlet of one of the standing tanks (10).

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