Portable monomer zinc-silver battery electrolyte filling instrument

Abstract

The invention discloses a portable monomer zinc-silver battery electrolyte filling instrument, and relates to the technical field of production of quantitative filling of alkali liquor in a monomer battery, in particular to a portable monomer zinc-silver battery electrolyte quantitative filling instrument on an application site. Comprising a shell A of a single battery, a positive electrode and a secondary electrode fixed on the shell A of the single battery, and a plurality of built-in positive and negative plates, the device further comprises an infusion pump, an air pump, a buffer tank, an air inlet valve, a pressure limiting valve and an alkali liquor tank B. The inlet end of the infusion pump is connected with the alkali liquor tank B. The outlet end of the infusion pump is connected with the inlet end of the buffer tank through an infusion valve, and the outlet end of the buffer tank is in sealed connection with the liquid filling opening of the single battery A. After the electrolyte is filled, the opening is used for being connected with a pressure limiting valve for releasing internal pressure, the outlet end of the buffer tank is in threaded connection with a shell A of the single battery, the air pump is connected with an exhaust pipe on the buffer tank through an air extraction valve, and an air inlet pipe connected with an air inlet valve is arranged on the buffer tank.

Description

Technical Field

[0001] The invention relates to the technical field of quantitative filling of alkali solution for single battery, in particular to a portable quantitative filling instrument for electrolyte of single zinc-silver battery at application site. Background Art

[0002] Zinc-silver battery is a sealed square container with several positive and negative plates built in. It is usually stored in a dry state and filled with electrolyte before use. Single cells of different capacities have different sizes and filling ports. The filling port cannot be structured if it is threaded. After filling the electrolyte, the filling port is also a pressure release port with a constant pressure. Due to different uses, the capacity of the electrolyte filled is also inconsistent, ranging from 10ml to 150ml. However, the accuracy requirements for filling the electrolyte are relatively high. No matter how many ml of electrolyte, the absolute error is ≤0.5ml, because the battery produces gas during electrochemical reaction during discharge, and the shell of the square container cannot withstand the pressure and will crack, and the battery will not be able to provide power to the weapon.

[0003] Zinc-silver batteries are mainly used as power sources for weapons, and require electrolyte filling before use, and there is a clear requirement for the duration; At present, the electrolyte filling of single cells is generally done manually. When filling, the required electrolyte needs to be converted into weight through density and filling volume, and then the required weight of electrolyte is weighed by electronic scale, and the air in the gaps between the battery cells inside the single cell can be filled after the syringe is used to extract the air; because the shell of the single cell contains a number of positive and negative electrodes, the positive electrodes of all positive and negative electrodes are connected in parallel and connected to the positive electrode of the single cell, and all negative electrodes are also connected in parallel and connected to the negative electrode of the single cell. The distance between the battery cell and the injection port is also very small, generally only 3 to 5 mm, and there is also a gap between the positive and negative electrodes. Filling a single battery requires multiple steps of pumping and filling to complete the electrolyte filling into the battery. The process is relatively cumbersome; and during filling, the injected electrolyte is often pumped out at the same time when the gas is pumped out, so there is often no fixed number of times, and the battery models are also different. Especially when the electrolyte filled reaches 60%, the air in the gap between the battery cells is difficult to discharge, and the battery electrode has a slow absorption process. If the air is slowly squeezed out by the gravity of the electrolyte, it will take a long time (about one hour), so the remaining 40% of the electrolyte needs to be divided into multiple fillings. It is troublesome and not conducive to product consistency. It requires skilled technicians to operate and cannot match wartime working conditions. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a portable single zinc-silver battery electrolyte filling instrument.

[0005] The present invention adopts the following technical solution: A portable single zinc-silver battery electrolyte filling instrument, comprising a shell of a single battery A, a positive electrode and a secondary electrode fixed on the shell of the single battery A, and a plurality of built-in positive and negative electrode sheets; further comprising a liquid extraction pump, an air extraction pump, a buffer tank, an air intake valve, a pressure limiting valve, and an alkali liquid tank B, wherein the inlet end of the liquid extraction pump is connected to the alkali liquid tank B, the outlet end of the liquid extraction pump is connected to the inlet end of the buffer tank through the liquid extraction valve, the outlet end of the buffer tank is sealed and connected to the liquid filling port of the single battery A, and this port is used to connect the pressure limiting valve for releasing the internal pressure after the electrolyte is filled, the outlet end of the buffer tank is threadedly connected to the shell of the single battery A, the air extraction pump is connected to the exhaust pipe on the buffer tank through the air extraction valve, and the buffer tank is provided with an air intake pipe connected to the air intake valve; The end of the liquid extraction valve connected to the inlet end of the buffer tank protrudes from the bottom of the buffer tank; The air inlet pipe connected to the air inlet valve on the buffer tank and the exhaust pipe 2 connected to the air extraction valve on the buffer tank are both located on the upper part or top of the two side walls of the buffer tank; The outlet end of the buffer tank and the shell A of the single cell are threadedly connected by a sealing ring; The electrolyte tank B is a measurable measuring cup; The suction speed of the suction pump controls the pressure in the buffer tank 3 to be -100KPa to -120KPa; The specific gravity of the electrolyte is about 1.2; The liquid pump 1 is a ceramic metering pump.

[0006] Compared with the traditional manual filling of single cells, the present invention has simple calculation, convenient operation, high accuracy, greatly shortens the filling time, improves the filling efficiency, and can achieve accurate filling without the need for skilled technical workers, thereby reducing the labor intensity of personnel; it can also avoid the risk of needle breakage during the filling process, and the electrolyte is corrosive, which can reduce the chance of injury during the filling process, and can improve the consistency of products, improve the quality of single cells, and improve wartime efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Attached Figure 1 It is a structural diagram of the present invention; Attached Figure 2 It is a schematic diagram of the product of the present invention; Attached Figure 3 This is one of the schematic diagrams of filling electrolyte in the present invention; Attached Figure 4 This is the second schematic diagram of electrolyte filling according to the present invention. DETAILED DESCRIPTION

[0008] See attached Figures 1 to 4, a portable single zinc-silver battery electrolyte filling instrument, including a shell of a single battery A, a positive electrode 6 and a secondary electrode 7 fixed on the shell of the single battery A, and a plurality of built-in positive and negative electrode sheets; also including a liquid pump 1, an air pump 2, a buffer tank 3, an air intake valve 4, a pressure limiting valve 5 and an alkali liquid tank B, the inlet end of the liquid pump 1 is connected to the alkali liquid tank B, the outlet end of the liquid pump 1 is connected to the inlet end of the buffer tank 3 through the liquid pumping valve 11, the outlet end of the buffer tank 3 is sealed and connected to the filling port of the single battery A, and this port is used to connect the pressure limiting valve 5 for releasing the internal pressure after the electrolyte is filled, the outlet end of the buffer tank 3 is threadedly connected to the shell of the single battery A, the air pump 2 is connected to the exhaust pipe 211 on the buffer tank 3 through the air pumping valve 21, and the buffer tank 3 is provided with an air intake pipe 41 connected to the air intake valve 4; The end of the liquid extraction valve 11 connected to the inlet end of the buffer tank 3 protrudes from the bottom of the buffer tank 3; The air intake pipe 41 on the buffer tank 3 connected to the air intake valve 4 and the air exhaust pipe 211 on the buffer tank 3 connected to the air extraction valve 21 are both located at the upper part or top of the two side walls of the buffer tank 3; The outlet end of the buffer tank 3 and the outer shell of the single battery A are threadedly connected by a sealing ring; The electrolyte tank B is a measurable measuring cup; The suction speed of the suction pump 2 controls the pressure in the buffer tank 3 to be -100KPa to -120KPa; The specific gravity of the electrolyte is about 1.2; The liquid pump 1 is a ceramic metering pump.

[0009] When the present invention is applied, during filling, the liquid pump 1 is started. Since the driving motor of the ceramic metering pump is a stepper motor, 3200 pulses per revolution are selected for each revolution. It is only necessary to set the total pulse (tp) steps and the pulse frequency of the stepper motor, and then start the stepper motor, wait for the stepper motor to stop, measure the total volume (tv) of the electrolyte extracted during the calibration process, and calculate how many pulse steps are required for one milliliter of electrolyte (single_p=tp / tv); after saving, it is only necessary to input the volume (V) of the alkali solution to be perfused, and the PLC can calculate the quantitative extraction of electrolyte; Before the electrolyte flows into the buffer tank 3 from the liquid injection port, the vacuum pump 2 and the vacuum valve 21 are first opened to first extract a part of the air in the battery, and then the air in the single cell A and the air in the gaps between the battery cells are extracted for a period of time, so that negative pressure is generated in the single cell A and the buffer tank 3. The pressure in the buffer tank reaches -100KPa, for example, and then the vacuum valve is opened to pump the electrolyte into the bottom of the buffer tank 3. The amount of electrolyte is controlled at about 70% of the rated amount. Since the specific gravity of the electrolyte is 1.2, which is greater than the vacuum force of the vacuum pump 2, the electrolyte will not be pumped out with the gas by the vacuum pump 2; at this time, the electrolyte flows into the single cell A at the bottom of the buffer tank; Close the air pump 2 and the air valve 21, and then open the air inlet valve 31 for a certain period of time. At this time, the buffer tank 3 and the single cell A are affected by the atmospheric pressure, and the air enters the buffer tank 3 from the air inlet of the air inlet valve 31. At the same time, the air presses the electrolyte at the bottom of the buffer tank 3 into the single cell A. When injecting liquid, alternately switch the air pump 21 and the air inlet valve 31 to force a certain amount of alkali liquid into the single cell A. The specific time to open the air pump 21 and the air inlet valve 31 should be determined according to the model of the single cell A. Thereby achieving the purpose of quantitative filling.

[0010] Control the suction speed and pressure of the vacuum pump 2. Since the density of the electrolyte is relatively high and the suction port is on the side of the buffer tank 3, it is ensured that the electrolyte will not be pumped out. When the pressure in the buffer tank 3 reaches -100KPa and the pressure in the battery is 0, the single cell A and the buffer tank 3 are sealed and connected. When the suction is stopped and the exhaust port system is opened, the pressure balance will be automatically formed and the electrolyte will be sucked into the single cell in a short time.

[0011] When the electrolyte is filled into the single cell A to reach a set value, when the buffer tank 3 is removed from the shell of the single cell A, a pressure limiting valve 5 that can release the internal pressure of the single cell A is fixedly connected to the electrolyte filling port of the buffer tank 3; when the internal air pressure of the single cell A changes due to the influence of external pressure (temperature, pressure, etc.), the internal pressure can be released through the pressure limiting valve 5 to ensure the safety of the product.

Claims

1. A portable single zinc-silver battery electrolyte filling instrument, comprising a single battery housing A, a positive electrode and a secondary electrode fixed on the single battery housing A, and a plurality of built-in positive and negative electrode sheets, characterized in that: It also includes a liquid pump, an air pump, a buffer tank, an air inlet valve, a pressure limiting valve and an alkali liquid tank B. The inlet end of the liquid pump is connected to the alkali liquid tank B, the outlet end of the liquid pump is connected to the inlet end of the buffer tank through the liquid pumping valve, the outlet end of the buffer tank is sealed and connected to the liquid filling port of the single cell A, and this port is used to connect the pressure limiting valve for releasing the internal pressure after the electrolyte is filled. The outlet end of the buffer tank is threadedly connected to the shell A of the single cell, the air pump is connected to the exhaust pipe on the buffer tank through the air pumping valve, and the buffer tank is provided with an air inlet pipe connected to the air inlet valve.

2. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The end of the liquid extraction valve connected to the inlet end of the buffer tank protrudes from the bottom of the buffer tank.

3. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The air inlet pipe connected to the air inlet valve on the buffer tank and the air exhaust pipe connected to the air extraction valve on the buffer tank are both located at the upper part or top of the two side walls of the buffer tank.

4. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The outlet end of the buffer tank and the outer shell A of the single battery are threadedly connected by a sealing ring.

5. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The electrolyte tank B is a measurable measuring cup.

6. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The suction speed of the suction pump controls the pressure in the buffer tank to be -100KPa to -120KPa.

7. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The specific gravity of the electrolyte is about 1.

2.

8. The portable single-unit zinc-silver battery electrolyte filling instrument according to claim 1 is characterized in that: The liquid pump is a ceramic metering pump.

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