Negative pressure pumping pipeline for negative pressure formation

Abstract

The utility model discloses a negative pressure pumping pipeline for negative pressure formation, which comprises a first negative pressure header pipe and a second negative pressure header pipe, a plurality of negative pressure branch pipes are axially arranged at intervals and used for connecting acid adding kettles, one end of the second negative pressure header pipe is connected with the first negative pressure header pipe, and the other end of the second negative pressure header pipe is externally connected with a negative pressure pumping system. The second negative pressure header pipe is provided with a first electromagnetic valve for controlling opening and closing of the second negative pressure header pipe, the two ends of the bypass pressure regulating pipeline are communicated with the second negative pressure header pipe, the first electromagnetic valve is located between the two ends, connected with the second negative pressure header pipe, of the bypass pressure regulating pipeline, and the bypass pressure regulating pipeline is provided with a second electromagnetic valve for controlling opening and closing of the bypass pressure regulating pipeline. The bypass pressure regulating pipeline is further provided with a pressure reducing valve used for regulating the opening degree of the bypass pressure regulating pipeline on the upstream side of the second electromagnetic valve. The negative pressure formation control of the second negative pressure header pipe and the bypass pressure regulating pipeline can realize different processes and different pressures, the charging formation pressure is adjustable, the acid liquid in the negative pressure formation acid kettle is ensured not to be gasified, and the negative pressure can quickly pump away heat energy generated by formation in the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a negative pressure extraction pipeline for negative pressure formation. Background Art

[0002] Lead-acid battery is a storage battery whose electrodes are mainly made of lead and its oxides, and whose electrolyte is sulfuric acid solution. When the lead-acid battery is discharged, the lead dioxide at the positive electrode and the spongy lead at the negative electrode are converted into lead sulfate; when charged, the lead sulfate at the positive and negative electrodes are converted into lead dioxide and spongy lead respectively.

[0003] Formation is a key process in the production of lead-acid batteries. Through charging and discharging, the positive active material is converted into lead dioxide, and the negative active material is converted into spongy lead. There are two common formation methods, plate formation and battery formation. Plate formation, also known as tank formation and external formation, inserts the positive and negative raw plates alternately into the formation tank, and the plates of the same polarity are arranged on the same side to form a multi-pole positive and negative electrode group for charging and forming mature plates. The battery is assembled with the formed mature plates. Non-dry-charged batteries also need to go through the acid addition and charging process. Battery formation, also known as internal formation, also known as "cadmium-free internal formation process", is to directly assemble the battery after the solidified and dried battery plates are cut and then acid is added to the battery for charging to obtain the finished product. Since the internal formation process eliminates the discharge of acid wastewater generated by tank formation in the production process of lead-acid batteries, the internal formation process is more environmentally friendly than the external formation process, so the internal formation process is gradually promoted and used in lead-acid battery production plants.

[0004] Whether it is plate formation or battery formation, it needs to go through the acid addition and charging process. Acid addition is a process in which a sulfuric acid solution enters the battery from an acid adding machine through an acid adding pot. Valve-regulated lead-acid batteries usually use vacuum negative pressure technology for acid addition. In recent years, vacuum negative pressure technology has also been gradually adopted for battery formation processes. In order to make the internal formation effect better, it is best to use negative pressure formation technology in the internal formation process. Negative pressure formation technology refers to the battery being charged and formed in a closed environment using a large current, and using a vacuum pressure device to remove the heat and acid mist generated during the formation. In the internal formation process, it is best to use negative pressure to discharge the gas inside the lead-acid battery and add acid to the lead-acid battery at the same time. It is also best to control the acid injection speed. At present, negative pressure can only be pumped manually. At the same time, different processes use different negative pressures during negative pressure formation, such as different pressures during acid addition and acid extraction. Traditional negative pressure formation cannot adjust the pressure or use a negative pressure main pipe to adjust the pressure, resulting in resource consumption and difficulty in large-scale production. Further improvement is needed. Utility Model Content

[0005] Based on the deficiencies in the prior art, the utility model provides a negative pressure extraction pipeline for negative pressure formation, which can realize different pressures in different processes through negative pressure formation control.

[0006] The technical solution adopted by the utility model to achieve the above technical purpose is:

[0007] A negative pressure extraction pipeline for negative pressure formation, wherein a plurality of storage batteries to be formed are placed in a formation tank during negative pressure formation, and each storage battery is connected to an acid adding pot, comprising:

[0008] The first negative pressure main pipe is provided with a plurality of negative pressure branch pipes at intervals along the axial direction, and the negative pressure branch pipes are used to connect the acid adding pots.

[0009] The second negative pressure main pipe has one end connected to the first negative pressure main pipe and the other end connected to an external negative pressure extraction system. The second negative pressure main pipe is provided with a first solenoid valve for controlling the opening and closing of the second negative pressure main pipe.

[0010] The bypass pressure regulating pipeline has two ends respectively connected to the second negative pressure main pipe, and the first solenoid valve is located between the two ends of the bypass pressure regulating pipeline connected to the second negative pressure main pipe. The bypass pressure regulating pipeline is provided with a second solenoid valve for controlling the opening and closing of the bypass pressure regulating pipeline. The bypass pressure regulating pipeline is also provided with a pressure reducing valve on the upstream side of the second solenoid valve for adjusting the opening of the bypass pressure regulating pipeline.

[0011] In the utility model, the upstream and downstream are divided according to the flow direction of the airflow when the negative pressure is pumped, and the flow direction of the airflow flows from the upstream to the downstream.

[0012] Through the negative pressure formation control of the second negative pressure main pipe and the bypass pressure regulating pipeline in the utility model, different pressures can be achieved in different processes, and the charging formation pressure is adjustable, which can ensure that the acid liquid in the negative pressure formation acid kettle does not gasify. The negative pressure can quickly draw away the heat energy generated by the internal formation of the battery to reduce the temperature of the battery formation process and shorten the battery formation time.

[0013] One end of the second negative pressure main pipe is connected to the axial middle part of the first negative pressure main pipe.

[0014] The second negative pressure main pipe is also provided with a first pressure sensor for detecting the air pressure, and the first pressure sensor is located between the connection with the upstream end of the bypass pressure regulating pipeline and the first solenoid valve;

[0015] A second pressure sensor for detecting air pressure is provided on the bypass pressure regulating pipeline upstream of the pressure reducing valve, so that the pressure can be detected in real time and the pressure in the pipeline can be adjusted through the electromagnetic valve.

[0016] More preferably, a first negative pressure gauge is provided on the second negative pressure main pipe before the first solenoid valve and the first pressure sensor;

[0017] A second negative pressure gauge is provided on the bypass pressure regulating pipeline between the pressure reducing valve and the second pressure sensor.

[0018] A ball valve for manually controlling the opening and closing of the bypass pressure regulating pipeline is provided on the bypass pressure regulating pipeline between the pressure reducing valve and the second negative pressure gauge.

[0019] When the pressure sensor does not work or breaks down, the pressure in the pipeline can be manually observed and adjusted through the ball valve.

[0020] During negative pressure formation, multiple formation tanks are arranged side by side, and a group of first negative pressure main pipes, second negative pressure main pipes and bypass pressure regulating pipes are arranged above each formation tank. The second negative pressure main pipes of each group are connected to the same negative pressure extraction system through the same negative pressure main pipe. Integrated control of negative pressure formation operation can be achieved.

[0021] The negative pressure formation control of the second negative pressure main pipe and the bypass pressure regulating pipeline in the utility model can realize different pressures in different processes, and the charging formation pressure is adjustable, which can ensure that the acid liquid in the negative pressure formation acid pot does not gasify. At the same time, the negative pressure can quickly draw away the heat energy generated by the internal formation of the battery to reduce the temperature of the battery formation process and shorten the battery formation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a negative pressure extraction pipeline diagram of the utility model;

[0023] Markings in the figure: 1-first negative pressure main pipe, 2-second negative pressure main pipe, 3-bypass pressure regulating pipeline, 4-negative pressure branch pipe, 5-first solenoid valve, 6-second solenoid valve, 7-pressure reducing valve, 8-first pressure sensor, 9-second pressure sensor, 10-first negative pressure gauge, 11-second negative pressure gauge, 12-ball valve. DETAILED DESCRIPTION

[0024] See also Figure 1 The utility model is a negative pressure pumping pipeline for negative pressure formation. During negative pressure formation, a plurality of batteries to be formed are placed in the formation tank, and each battery is connected to an acid adding pot, comprising:

[0025] The first negative pressure main pipe 1 is provided with a plurality of negative pressure branch pipes 4 at intervals along the axial direction, and the negative pressure branch pipes 4 are used to connect the acid adding pots.

[0026] The second negative pressure main pipe 2 has one end connected to the first negative pressure main pipe 1 and the other end connected to an external negative pressure extraction system. The second negative pressure main pipe 2 is provided with a first solenoid valve 5 for controlling the opening and closing of the second negative pressure main pipe 2.

[0027] The bypass pressure regulating pipeline 3 has two ends connected to the second negative pressure main pipe 2 respectively, and the first solenoid valve 5 is located between the two ends of the bypass pressure regulating pipeline 3 connected to the second negative pressure main pipe 2. The bypass pressure regulating pipeline 3 is provided with a second solenoid valve 6 for controlling the opening and closing of the bypass pressure regulating pipeline 3. The bypass pressure regulating pipeline 3 is also provided with a pressure reducing valve 7 on the upstream side of the second solenoid valve 6 for adjusting the opening of the bypass pressure regulating pipeline 3.

[0028] In the utility model, the upstream and downstream are divided according to the flow direction of the airflow when the negative pressure is pumped, and the flow direction of the airflow flows from the upstream to the downstream.

[0029] The negative pressure formation control of the second negative pressure main pipe 2 and the bypass pressure regulating pipe 3 can achieve different pressures in different processes. The charging formation pressure is adjustable, which can ensure that the acid in the negative pressure formation acid pot does not gasify. The negative pressure can quickly draw away the heat energy generated by the internal formation of the battery to reduce the temperature of the battery formation process and shorten the battery formation time.

[0030] One end of the second negative pressure main pipe 2 is connected to the axial middle part of the first negative pressure main pipe 1 .

[0031] The second negative pressure main pipe 2 is also provided with a first pressure sensor 8 for detecting the air pressure. The first pressure sensor 8 is located between the connection with the upstream end of the bypass pressure regulating pipe 3 and the first solenoid valve 5;

[0032] A second pressure sensor 9 for detecting the air pressure is provided on the bypass pressure regulating pipeline 3 upstream of the pressure reducing valve 7. The pressure can be detected in real time and the pressure in the pipeline can be adjusted through the solenoid valve.

[0033] A first negative pressure gauge 10 is provided on the second negative pressure main pipe 2 before the first solenoid valve 5 and the first pressure sensor 8; a second negative pressure gauge 11 is provided on the bypass pressure regulating pipeline 3 between the pressure reducing valve 7 and the second pressure sensor 9. A ball valve 12 for manually controlling the opening and closing of the bypass pressure regulating pipeline 3 is provided on the bypass pressure regulating pipeline 3 between the pressure reducing valve 7 and the second negative pressure gauge 11. When the pressure sensor does not work or is broken, the pressure in the pipeline can be manually observed and adjusted through the ball valve.

[0034] During negative pressure formation, multiple formation tanks are arranged side by side, and a group of first negative pressure main pipe 1, second negative pressure main pipe 2 and bypass pressure regulating pipeline 3 are arranged above each formation tank. The second negative pressure main pipe 2 of each group is connected to the same negative pressure extraction system through the same negative pressure main pipeline. Integrated control of negative pressure formation operation can be realized.

Claims

1. A negative pressure extraction pipeline for negative pressure formation, wherein a plurality of batteries to be formed are placed in a formation tank during negative pressure formation, and each battery is connected to an acid adding pot, characterized in that: include: The first negative pressure main pipe is provided with a plurality of negative pressure branch pipes at intervals along the axial direction, and the negative pressure branch pipes are used to connect the acid adding pots. The second negative pressure main pipe has one end connected to the first negative pressure main pipe and the other end connected to an external negative pressure extraction system. The second negative pressure main pipe is provided with a first solenoid valve for controlling the opening and closing of the second negative pressure main pipe. The bypass pressure regulating pipeline has two ends respectively connected to the second negative pressure main pipe, and the first solenoid valve is located between the two ends of the bypass pressure regulating pipeline connected to the second negative pressure main pipe. The bypass pressure regulating pipeline is provided with a second solenoid valve for controlling the opening and closing of the bypass pressure regulating pipeline. The bypass pressure regulating pipeline is also provided with a pressure reducing valve on the upstream side of the second solenoid valve for adjusting the opening of the bypass pressure regulating pipeline.

2. The negative pressure extraction pipeline for negative pressure formation according to claim 1, characterized in that: One end of the second negative pressure main pipe is connected to the axial middle part of the first negative pressure main pipe.

3. The negative pressure extraction pipeline for negative pressure formation according to claim 1, characterized in that: The second negative pressure main pipe is also provided with a first pressure sensor for detecting the air pressure, and the first pressure sensor is located between the connection with the upstream end of the bypass pressure regulating pipeline and the first solenoid valve; A second pressure sensor for detecting air pressure is provided on the bypass pressure regulating pipeline upstream of the pressure reducing valve.

4. The negative pressure extraction pipeline for negative pressure formation according to claim 3, characterized in that: A first negative pressure gauge is provided on the second negative pressure main pipe before the first solenoid valve and the first pressure sensor; A second negative pressure gauge is provided on the bypass pressure regulating pipeline between the pressure reducing valve and the second pressure sensor.

5. The negative pressure extraction pipeline for negative pressure formation according to claim 4, characterized in that: A ball valve for manually controlling the opening and closing of the bypass pressure regulating pipeline is provided on the bypass pressure regulating pipeline between the pressure reducing valve and the second negative pressure gauge.

6. The negative pressure extraction pipeline for negative pressure formation according to claim 1, characterized in that: During negative pressure formation, multiple formation tanks are arranged side by side, and a group of first negative pressure main pipes, second negative pressure main pipes and bypass pressure regulating pipelines are correspondingly arranged above each formation tank. The second negative pressure main pipes of each group are connected to the same negative pressure extraction system through the same negative pressure main pipeline.

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