CN111579413B - Device for detecting acid saturation of AGM power lead-acid storage battery and using method thereof - Google Patents
Device for detecting acid saturation of AGM power lead-acid storage battery and using method thereof Download PDFInfo
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- CN111579413B CN111579413B CN202010373252.4A CN202010373252A CN111579413B CN 111579413 B CN111579413 B CN 111579413B CN 202010373252 A CN202010373252 A CN 202010373252A CN 111579413 B CN111579413 B CN 111579413B
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Abstract
The invention discloses an acid saturation detection device of an AGM power lead-acid storage battery and a use method thereof, relating to the technical field of battery detection; comprises an acid return barrel, an acid discharge port, an exhaust tube, an acid pumping tube, an acid return tube, a balance tube connected to the upper end of the acid return barrel, electromagnetic valves arranged on the acid pumping tube, the acid return tube and the balance tube, a weighing scale for a battery, and an adapter connected to an acid injection nozzle of the battery; the adapter comprises a main body inserted on the acid injection nozzle, an acid channel penetrating through the upper end and the lower end of the main body, an air channel for introducing gas outside the battery into the battery, and a sealing mechanism for increasing the air tightness between the main body and the acid injection nozzle, wherein the lower end of the air channel is higher than the lower end of the acid channel; the lower end of the main body is flush with the upper edge of the AGM separator in the battery; one end of the acid pumping pipe, which is far away from the acid return barrel, is connected to the upper end of the acid channel; and one end of the acid return pipe, which is far away from the acid return barrel, is connected to the upper end of the acid passage. Is convenient to use.
Description
Technical Field
The invention belongs to the technical field of battery detection, and particularly relates to an acid saturation detection device for an AGM power lead-acid storage battery and a using method thereof.
Background
The AGM power lead-acid storage battery is widely applied to the field of electric moped and tricycles with the performances of long service life, low cost, safety and reliability, and the AGM partition plate and positive and negative living matters of the finished battery can reserve certain proportion of 'spaces' which are not occupied by acid (electrolyte), and the 'spaces' are connected together to form an oxygen composite channel, so that oxygen generated from a positive electrode in the charging process can reach a negative electrode through the channel to be compounded with hydrogen (to form water) and then returns to the electrolyte again, the water loss of the battery is reduced, and the service life of the battery is ensured. However, this ratio (i.e. the saturation of the electrolyte in the AGM separator) is just as good: if the saturation is too high and the space is too small, the channel is blocked, so that oxygen recombination cannot be carried out, and the direct result is that oxygen and hydrogen can be discharged out of the battery, so that excessive water loss is caused, and finally the battery is thermally out of control and the service life is ended; if the saturation is too low, too much "space" will directly result in relatively too little electrolyte, insufficient acid content during the use of the battery or end of life due to thermal runaway of the battery.
The current saturation detection device has low detection efficiency.
Disclosure of Invention
The invention aims to overcome the defect of low detection efficiency in the prior art, and provides an AGM power lead-acid storage battery acid saturation detection device and a use method thereof, which are convenient to detect.
In order to achieve the purpose, the invention adopts the following technical scheme:
an acid saturation detection device of an AGM power lead-acid storage battery comprises an acid return barrel for storing pumped acid, an acid discharge port positioned at the lower end of the acid return barrel, an exhaust pipe for extracting gas in the acid return barrel, an acid pumping pipe connected to the upper end of the acid return barrel and positioned above the acid in the acid return barrel, an acid return pipe connected to the upper end of the acid return barrel and used for pumping the acid in the acid return barrel back into the battery, a balance pipe connected to the upper end of the acid return barrel, electromagnetic valves positioned on the acid pumping pipe, the acid return pipe and the balance pipe, a scale used for weighing the battery, and an adapter connected to an acid injection nozzle of the battery; the adapter comprises a main body inserted on the acid injection nozzle, an acid channel penetrating through the upper end and the lower end of the main body, an air channel for introducing gas outside the battery into the battery, and a sealing mechanism for increasing the air tightness between the main body and the acid injection nozzle, wherein the lower end of the air channel is higher than the lower end of the acid channel; the lower end of the main body is flush with the upper edge of the AGM separator in the battery; one end of the acid pumping pipe, which is far away from the acid return barrel, is connected to the upper end of the acid channel; and one end of the acid return pipe, which is far away from the acid return barrel, is connected to the upper end of the acid passage. Simple structure and convenient use.
Preferably, the sealing mechanism comprises a sealing ring sleeved on the main body and a boss fixedly connected to the main body and used for extruding the sealing ring at the upper end of the acid filling nozzle. The structure is simple.
Preferably, the automatic acid recovery device further comprises a carrier, the electromagnetic valve, the acid recovery barrel and the scale are all located on the carrier, a lifting plate used for supporting the battery is arranged above the scale, and a supporting block used for supporting the lifting plate is arranged below the edge of the lifting plate. Is convenient to carry.
Preferably, the gas extraction pipe is connected with a purification mechanism for treating the gas extracted from the acid return barrel. Is more environment-friendly.
Preferably, the purification mechanism comprises a drying barrel filled with acid mist for absorption, and a filtering barrel located between the drying barrel and the acid return barrel for condensing acid in the gas. The absorption effect is good.
Preferably, a condensing ball is arranged in the filter vat, a yarn package with alkali lime powder arranged inside is arranged in the drying vat, a first connecting pipe for guiding gas in the acid returning vat to the lower portion of the filter vat is arranged between the acid returning vat and the filter vat, a second connecting pipe for guiding gas in the filter vat to the lower portion of the drying vat is arranged between the filter vat and the drying vat, and the air exhaust pipe is connected to the upper end of the drying vat. The structure is simple.
Preferably, another sealing mechanism is provided, the sealing mechanism comprises a cylinder body sleeved outside the main body, an annular supporting plate fixedly connected between the cylinder body and the main body, an air hole positioned on the supporting plate, a sealing gasket positioned on the upper side of the supporting plate, an air hole positioned on the sealing gasket, a piston positioned between the cylinder body and the main body and used for extruding the sealing gasket, a piston rod with the lower end connected to the piston, an annular notch positioned on the cylinder body, an annular pressing plate connected to the upper end of the piston rod, a fixing sleeve rotatably connected to the outer edge of the pressing plate and used for being in threaded connection with the upper end of the cylinder body, an annular second piston positioned between the main body and the cylinder body, a rotating body rotatably connected to the lower end of the cylinder body and supported on the lower side of the acid filling nozzle after rotating, and a connecting rod positioned between the rotating body and the second piston and used for driving the rotating body; the outer edge of the sealing gasket is positioned in the notch, the upper end of the connecting rod is hinged to the lower side of the second piston, the rotating body is of a tubular structure, the lower end of the connecting rod is hinged to one side, close to the main body, of the upper end of the rotating body, a hiding groove for hiding the connecting rod is formed in one side, far away from the main body, of the upper end of the rotating body, and the height of the lower end of the air passage is lower than that of the second piston; when the rotating body is supported at the lower side of the acid filling nozzle after rotating, the fixed sleeve is in threaded connection with the upper end of the cylinder body and is abutted against the upper end of the acid filling nozzle. Has the effect of saving labor.
Preferably, the upper end of the air passage is positioned on the outer side wall of the main body, and a sealing sleeve for blocking the upper end of the air passage is connected to the main body in a sliding manner. The sealing sleeve is used for sealing the air passage to protect the fingers.
A use method of an AGM power lead-acid storage battery acid saturation detection device comprises the following steps: step a: charging the battery at the later stage of formation, wherein free acid exists above the AGM separator; step b: the suction pipe is connected with a negative pressure source, the negative pressure value of the negative pressure source is adjusted to the value required by the process, the electromagnetic valve operates, the balance pipe is closed, the acid pumping pipe is opened, the acid return pipe is closed, the adapter is held by hand, and the lower end of the adapter is inserted into the acid injection nozzle; step c: blocking the upper end of the air passage, starting air extraction by the air extraction pipe, enabling free acid above the battery partition plate to enter the acid return barrel through the acid extraction pipe, and enabling the air pressure inside the battery to be in a negative pressure state required by the process; after maintaining for 3-5s, loosening the fingers on the upper end of the air passage, allowing air outside the battery to enter the battery through the air passage, and recovering the normal pressure inside the battery, wherein the operation is carried out for 2-3 times in total; step d: pulling out the adapter, placing the battery on the scale, reading the value of the scale and recording the value as M1; step e: opening an acid discharge port on the acid return barrel, taking a small amount of acid, measuring the density and temperature of the acid by using a rapid density tester, converting the density into the density at 25 ℃, and recording the density as p; step f: the adapter is inserted into the acid injection nozzle again to block the upper end of the air passage, so that the interior of the battery is in a negative pressure state, the negative pressure state is maintained for 5-7s, the electromagnetic valve is operated, the acid return pipe is opened, the acid pumping pipe is closed, the balance pipe is opened, acid in the acid return barrel enters the interior of the battery through the acid return pipe under the action of air pressure, and the upper end of the air passage is opened slowly; step g: operating the electromagnetic valve, closing the balance pipe, opening the acid pumping pipe, closing the acid return pipe, pumping air by the air pumping pipe, and pumping free acid above the AGM partition plate into the acid return barrel under normal pressure; step h: placing the battery on the scale, reading the scale and recording as M2; step i: calculating the weight saturation, [ G- (M2-M1) ]/G100%, wherein G is the acid-containing weight of the single-grid process; step j: calculating the volume saturation, [ V- (M2-M1)/p ]/V100%, wherein V is the acid-containing volume of the single-lattice process; step k: and judging whether the product is qualified or not according to the calculated weight saturation and volume saturation.
The invention has the beneficial effects that: the invention provides an AGM power lead-acid storage battery acid saturation detection device and a use method thereof, which are convenient to detect; the safety is good and the environment is protected.
Drawings
FIG. 1 is a schematic view of example 1;
FIG. 2 is an enlarged view of FIG. 1 at A;
figure 3 is a schematic view of an adapter of embodiment 2;
figure 4 is a schematic view of the adapter of embodiment 2 fixed to an acid nozzle.
In the figure: the device comprises an acid recovery barrel 1, an air extraction pipe 2, an acid extraction pipe 3, an acid recovery pipe 4, an electromagnetic valve 5, a balance pipe 6, a scale 7, a switching joint 8, an acid injection nozzle 9, a main body 10, an acid channel 12, an air passage 13, a sealing ring 14, a boss 15, a transport vehicle 16, a lifting plate 17, a support block 18, a drying barrel 19, a first connecting pipe 20, a condensation ball 21, a silk bag 22, a second connecting pipe 23, a cylinder body 24, a support plate 25, a sealing gasket 26, a piston 27, a notch 28, an air hole 29, a piston rod 30, a pressure plate 31, a fixing sleeve 32, a second piston 33, a rotating body 34, a connecting rod 35, an avoiding groove 36, a sealing sleeve 37, an acid discharge port 38, a battery 39 and a filter barrel 40.
Detailed Description
The invention is explained in further detail below with reference to the figures and the detailed description:
example 1:
see fig. 1-2; an acid saturation detection device of an AGM power lead-acid storage battery comprises an acid return barrel 1 for storing extracted acid, an acid discharge port 38 positioned at the lower end of the acid return barrel 1, an air extraction pipe 2 for extracting gas in the acid return barrel 1, an acid extraction pipe 3 connected to the upper end of the acid return barrel 1 and positioned above the acid in the acid return barrel 1, an acid return pipe 4 connected to the upper end of the acid return barrel 1 and used for extracting the acid in the acid return barrel 1 back into a battery 39, a balance pipe 6 connected to the upper end of the acid return barrel 1 and communicated with the atmosphere, electromagnetic valves 5 positioned on the acid extraction pipe 3, the acid return pipe 4 and the balance pipe 6, a weighing scale 7 for the battery 39, an adapter 8 connected to an acid injection nozzle 9 of the battery 39 and a carrier 16; the electromagnetic valve 5, the acid return barrel 1 and the scale 7 are all positioned on the carrier 16, a lifting plate 17 used for supporting the battery 39 is arranged above the scale 7, and a supporting block 18 used for supporting the lifting plate 17 is arranged below the edge of the lifting plate 17.
The adapter 8 comprises a main body 10 inserted on the acid injection nozzle 9, an acid channel 12 penetrating through the upper end and the lower end of the main body 10, an air channel 13 for guiding gas outside the battery 39 into the battery 39, and a sealing mechanism for increasing the air tightness between the main body 10 and the acid injection nozzle 9, wherein the lower end of the air channel 13 is higher than the lower end of the acid channel 12; the lower end of the main body 10 is flush with the upper edge of the AGM separator in the battery 39; one end of the acid pumping pipe 3, which is far away from the acid return barrel 1, is connected to the upper end of the acid channel 12; the end of the acid return pipe 4 far away from the acid return barrel 1 is connected with the upper end of the acid passage 12.
The sealing mechanism comprises a sealing ring 14 sleeved on the main body 10 and a boss 15 fixedly connected on the main body 10 and used for extruding the sealing ring 14 at the upper end of the acid injection nozzle 9.
The exhaust pipe 2 is connected with a purification mechanism for treating the gas exhausted from the acid return barrel 1. The purification mechanism comprises a drying barrel 19 filled with acid mist for absorption, and a filter barrel 40 positioned between the drying barrel 19 and the acid return barrel 1 for condensing acid in the gas. A condensing ball 21 is arranged in the filter barrel 40, a thread bag 22 with alkali lime powder arranged inside is arranged in the drying barrel 19, a first connecting pipe 20 for guiding the gas in the acid return barrel 1 to the lower part of the filter barrel 40 is arranged between the acid return barrel 1 and the filter barrel 40, a second connecting pipe 23 for guiding the gas in the filter barrel 40 to the lower part of the drying barrel 19 is arranged between the filter barrel 40 and the drying barrel 19, and the air suction pipe 2 is connected to the upper end of the drying barrel 19.
The use method of the embodiment comprises the following steps:
step a: charging the battery 39 in the latter stage of formation, wherein free acid is present above the AGM separator; step b: the suction pipe 2 is connected with a negative pressure source, the negative pressure value of the negative pressure source is adjusted to the value required by the process, the electromagnetic valve 5 runs, the balance pipe 6 is closed, the acid pumping pipe 3 is opened, the acid return pipe 4 is closed, the adapter 8 is held by hand, and the lower end of the adapter 8 is inserted into the acid injection nozzle 9; step c: blocking the upper end of the air passage 13, starting air extraction by the air extraction pipe 2, and allowing free acid above the partition plate of the battery 39 to enter the acid return barrel 1 through the acid extraction pipe 3, wherein the air pressure inside the battery 39 is in a negative pressure state required by the process; after maintaining for 3-5s, loosening the fingers on the upper end of the air passage 13, allowing air outside the battery 39 to enter the battery 39 through the air passage 13, and recovering the normal pressure inside the battery 39, wherein the operation is performed for 2-3 times in total to ensure complete extraction; step d: the adapter 8 is pulled out, the battery 39 is placed on the scale 7, and the value of the scale 7 is read out and recorded as M1; step e: opening an acid discharge port 38 on the acid recovery barrel 1, taking a small amount of acid, measuring the density and temperature of the acid by using a rapid density tester, converting the density into the density at 25 ℃, and recording the density as p; step f: the adapter 8 is inserted into the acid injection nozzle 9 again to block the upper end of the air passage 13, so that the interior of the battery 39 is in a negative pressure state, the negative pressure state is maintained for 5-7s, the electromagnetic valve 5 is operated, the acid return pipe 4 is opened, the acid pumping pipe 3 is closed, the balance pipe 6 is opened, acid in the acid return barrel 1 enters the interior of the battery 39 through the acid return pipe 4 under the action of air pressure, and the upper end of the air passage 13 is opened slowly; step g: operating the electromagnetic valve 5, closing the balance pipe 6, opening the acid pumping pipe 3, closing the acid return pipe 4, pumping air from the air pumping pipe 2, and pumping free acid above the AGM partition plate into the acid return barrel 1 under normal pressure; step h: placing battery 39 on scale 7 and reading scale 7 as M2; step i: calculating the weight saturation, [ G- (M2-M1) ]/G100%, wherein G is the acid-containing weight of the single-grid process; step j: calculating the volume saturation, [ V- (M2-M1)/p ]/V100%, wherein V is the acid-containing volume of the single-lattice process; step k: and judging whether the product is qualified or not according to the calculated weight saturation and volume saturation.
In the above steps, each time the adapter 8 is inserted into the acid injection nozzle 9, the adapter 8 needs to be pressed by hand, and the sealing ring 14 is extruded by the boss 15 and the acid injection nozzle 9 to ensure air tightness; and the upper end of the air passage 13 is closed by means of finger pressure.
Since the adapter 8 needs to be pressed down each time the adapter 8 is inserted, in order to protect the scale 7, the lifting plate 17 is lifted by the support block 18 each time the scale 7 is pressed, and the lifting plate 17 is separated from the scale 7; when the weight of the battery 39 is weighed each time, the support block 18 is lowered, the lifting plate 17 is lowered, finally the lifting plate 17 abuts against the scale 7, and the support block 18 and the lifting plate 17 are separated; it should be noted that in the present embodiment, both M1 and M2 include the weight of the lifting plate 17, and the weight of the lifting plate 17 can be offset by subtracting the two weights.
G in the weight saturation calculation formula is the acid-containing weight of the single lattice process, and is the theoretical acid-containing weight when the saturation of the acid in the battery 39 is 100%, which is a numerical value obtained through a large number of experimental statistics, and similarly, V is the volume corresponding to G and is also a theoretical value, and is not expanded here.
A normal AGM separator contains a portion of the "space" that becomes larger under negative pressure, and the acid in the AGM separator is "squeezed" out and then drawn out, the acid drawn out under negative pressure containing free acid at atmospheric pressure and acid "squeezed" out of the AGM separator under negative pressure.
In the formula, M2-M1 is equal to the acid "squeezed" out of the AGM separator under negative pressure.
The more "space" in the AGM separator under negative pressure, the more easily the acid in the AGM separator is squeezed out, the higher the value of M2-M1, the lower the weight saturation.
In the limit, when there is no "space" in the AGM separator, i.e. 100% saturation, there is no "space" to squeeze out the acid under negative pressure, so the acid extracted under negative pressure is equal to the free acid extracted under normal pressure, i.e. M1 ═ M2.
The separation of volume saturation is similar.
Example 2:
referring to fig. 3 to 4, the present embodiment is substantially the same as embodiment 1 except that: the sealing mechanism comprises a cylinder body 24 sleeved outside the main body 10, an annular supporting plate 25 fixedly connected between the cylinder body 24 and the main body 10, an air hole 29 positioned on the supporting plate 25, a sealing gasket 26 positioned on the upper side of the supporting plate 25, an air hole 29 positioned on the sealing gasket 26, a piston 27 positioned between the cylinder body 24 and the main body 10 and used for extruding the sealing gasket 26, and a piston rod 30 of which the lower end is connected to the piston 27, an annular notch 28 positioned on the cylinder 24, an annular pressure plate 31 connected to the upper end of the piston rod 30, a fixed sleeve 32 rotatably connected to the outer edge of the pressure plate 31 and used for being in threaded connection with the upper end of the cylinder 24, an annular second piston 33 positioned between the main body 10 and the cylinder 24, a rotator 34 rotatably connected to the lower end of the cylinder 24 and supported on the lower side of the acid injection nozzle 9 after rotating, and a connecting rod 35 positioned between the rotator 34 and the second piston 33 and used for driving the rotator 34; the outer fringe of sealed pad 26 is located notch 28, connecting rod 35 upper end articulates at second piston 33 downside, rotor 34 is the tubular structure, connecting rod 35 lower extreme articulates in one side that is close to main part 10 in rotor 34 upper end, main part 10 one side is kept away from in rotor 34 upper end is equipped with the groove 36 of dodging that is used for dodging connecting rod 35, the height that second piston 33 place was less than in air flue 13 lower extreme position. The upper end of the air channel 13 is positioned on the outer side wall of the main body 10, and a sealing sleeve 37 for blocking the upper end of the air channel 13 is slidably connected on the main body 10.
When the rotator 34 is supported at the lower side of the acid filling nozzle 9 after rotating, the fixed sleeve 32 is in threaded connection with the upper end of the cylinder 24 and abuts against the upper end of the acid filling nozzle 9.
The application method of the embodiment comprises the following steps:
a, step a: the battery 39 is charged at the end of the production, when free acid is present above the AGM separator; step b: the suction pipe 2 is connected with a negative pressure source, the negative pressure value of the negative pressure source is adjusted to the value required by the process, the electromagnetic valve 5 runs, the balance pipe 6 is closed, the acid pumping pipe 3 is opened, the acid return pipe 4 is closed, the adapter 8 is held by hand, and the lower end of the adapter 8 is inserted into the acid injection nozzle 9; step c: blocking the upper end of the air passage 13, starting air extraction by the air extraction pipe 2, and allowing free acid above the partition plate of the battery 39 to enter the acid return barrel 1 through the acid extraction pipe 3, wherein the air pressure inside the battery 39 is in a negative pressure state required by the process; after maintaining for 3-5s, loosening the fingers on the upper end of the air passage 13, allowing air outside the battery 39 to enter the battery 39 through the air passage 13, and recovering the normal pressure inside the battery 39, wherein the operation is performed for 2-3 times in total; step d: the adapter 8 is pulled out, the battery 39 is placed on the scale 7, and the value of the scale 7 is read out and recorded as M1; step e: opening an acid discharge port 38 on the acid recovery barrel 1, taking a small amount of acid, measuring the density and temperature of the acid by using a rapid density tester, converting the density into the density at 25 ℃, and recording the density as p; step f: the adapter 8 is inserted into the acid injection nozzle 9 again to block the upper end of the air passage 13, so that the interior of the battery 39 is in a negative pressure state, the negative pressure state is maintained for 5-7s, the electromagnetic valve 5 is operated, the acid return pipe 4 is opened, the acid pumping pipe 3 is closed, the balance pipe 6 is opened, acid in the acid return barrel 1 enters the interior of the battery 39 through the acid return pipe 4 under the action of air pressure, and the upper end of the air passage 13 is opened slowly; step g: operating the electromagnetic valve 5, closing the balance pipe 6, opening the acid pumping pipe 3, closing the acid return pipe 4, pumping air from the air pumping pipe 2, and pumping free acid above the AGM partition plate into the acid return barrel 1 under normal pressure; step h: placing battery 39 on scale 7 and reading scale 7 as M2; step i: calculating the weight saturation, [ G- (M2-M1) ]/G100%, wherein G is the acid-containing weight of the single-grid process; step j: calculating the volume saturation, [ V- (M2-M1)/p ]/V100%, wherein V is the acid-containing volume of the single-lattice process; step k: and judging whether the product is qualified or not according to the calculated weight saturation and volume saturation.
In this embodiment, when the adaptor 8 is inserted, the acid filling nozzle 9 is inserted into the lower end of the main body 10, then the piston rod 30 is pushed downwards, the second piston 33 moves downwards under the action of air pressure to drive the connecting rod 35 to push the rotating body 34 downwards, the lower end of the rotating body 34 rotates towards the side far away from the main body 10, finally, the rotating body 34 rotates to be horizontal, the upper side of the rotating body 34 is attached to the lower side of the acid filling nozzle 9, the fixing sleeve 32 is rotated, the fixing sleeve 32 is in threaded connection with the upper end of the cylinder body 24, and finally, the lower end of the fixing sleeve 32 abuts against the upper end of the acid filling nozzle 9, so that the main body 10 is fixed on the acid filling nozzle 9 without being pressed by hands.
In the above process, when the fixing sleeve 32 is rotated, the piston 27 continuously presses the sealing gasket 26, the sealing gasket 26 is deformed, and the outer edge of the sealing gasket 26 presses the inner side of the acid filling nozzle 9, thereby ensuring airtightness.
When the upper end of the air passage 13 needs to be blocked, the sealing sleeve 37 is directly slid without pressing by fingers, and the fingers do not need to wear gloves.
Claims (8)
1. The acid saturation detection device of the AGM power lead-acid storage battery is characterized by comprising an acid return barrel for storing pumped acid, an acid discharge port positioned at the lower end of the acid return barrel, an exhaust tube for pumping gas in the acid return barrel, an acid pumping tube connected to the upper end of the acid return barrel and positioned above the acid in the acid return barrel, an acid return tube connected to the upper end of the acid return barrel and used for pumping the acid in the acid return barrel back into a battery, a balance tube connected to the upper end of the acid return barrel and communicated with the atmosphere, electromagnetic valves positioned on the acid pumping tube, the acid return tube and the balance tube, a scale for weighing the battery and an adapter connected to an acid injection nozzle of the battery; the adapter comprises a main body inserted on the acid injection nozzle, an acid channel penetrating through the upper end and the lower end of the main body, an air channel for introducing gas outside the battery into the battery, and a sealing mechanism for increasing the air tightness between the main body and the acid injection nozzle, wherein the lower end of the air channel is higher than the lower end of the acid channel; the lower end of the main body is flush with the upper edge of the AGM separator in the battery; one end of the acid pumping pipe, which is far away from the acid return barrel, is connected to the upper end of the acid passage; one end of the acid return pipe, which is far away from the acid return barrel, is connected to the upper end of the acid passage;
The sealing mechanism comprises a cylinder body sleeved outside the main body, an annular supporting plate fixedly connected between the cylinder body and the main body, an air hole positioned on the supporting plate, a sealing gasket positioned on the upper side of the supporting plate, an air hole positioned on the sealing gasket, a piston positioned between the cylinder body and the main body and used for extruding the sealing gasket, a piston rod with the lower end connected to the piston, an annular notch positioned on the cylinder body, an annular pressing plate connected to the upper end of the piston rod, a fixing sleeve rotatably connected to the outer edge of the pressing plate and used for being in threaded connection with the upper end of the cylinder body, an annular second piston positioned between the main body and the cylinder body, a rotor rotatably connected to the lower end of the cylinder body and supported on the lower side of the acid injection nozzle after rotation, and a connecting rod positioned between the rotor and the second piston and used for driving the rotor; when the rotor rotates to the horizontal position, the upper side of the rotor is jointed with the lower side of the acid filling nozzle.
2. The AGM power lead-acid battery acid saturation detection device according to claim 1, further comprising a cart, wherein the solenoid valve, the acid return barrel and the scale are all located on the cart, a lifting plate for supporting the battery is arranged above the scale, and a support block for supporting the lifting plate is arranged below the edge of the lifting plate.
3. The AGM powered lead acid battery acid saturation detection device according to claim 1, wherein a purification mechanism for processing gas extracted from an acid return barrel is connected to the extraction pipe.
4. The AGM powered lead acid battery acid saturation detection apparatus according to claim 3, wherein said purification mechanism includes a dry tub filled with a gas for absorbing acid mist, a filter tub located between the dry tub and the acid return tub for condensing acid in the gas.
5. The AGM power lead-acid storage battery acid saturation detection device according to claim 4, wherein a condensation ball is arranged in the filter barrel, a silk bag with soda lime powder inside is arranged in the drying barrel, a first connecting pipe for guiding gas in the acid return barrel to the lower portion of the filter barrel is arranged between the acid return barrel and the filter barrel, a second connecting pipe for guiding gas in the filter barrel to the lower portion of the drying barrel is arranged between the filter barrel and the drying barrel, and the air suction pipe is connected to the upper end of the drying barrel.
6. The AGM power lead-acid storage battery acid saturation detection device according to claim 1, wherein the outer edge of the sealing gasket is located in the groove, the upper end of the connecting rod is hinged to the lower side of the second piston, the rotor is of a tubular structure, the lower end of the connecting rod is hinged to one side of the upper end of the rotor close to the main body, a hiding groove for hiding the connecting rod is formed in one side of the upper end of the rotor far away from the main body, and the lower end of the air passage is lower than the second piston; when the rotating body rotates and then is supported at the lower side of the acid filling nozzle, the fixing sleeve is in threaded connection with the upper end of the cylinder body and abuts against the upper end of the acid filling nozzle.
7. The AGM power lead-acid battery acid saturation detection device according to claim 1, wherein the upper end of the air passage is located on the outer side wall of the main body, and a sealing sleeve for blocking the upper end of the air passage is connected to the main body in a sliding mode.
8. Use of the AGM powered lead acid battery acid saturation detection apparatus according to any one of claims 1 to 7, comprising the steps of:
a, step a: charging the battery at the later stage of formation, wherein free acid exists above the AGM separator;
step b: the suction pipe is connected with a negative pressure source, the negative pressure value of the negative pressure source is adjusted to the value required by the process, the electromagnetic valve operates, the balance pipe is closed, the acid pumping pipe is opened, the acid return pipe is closed, the adapter is held by hand, and the lower end of the adapter is inserted into the acid injection nozzle;
step c: blocking the upper end of the air passage, starting air extraction by the air extraction pipe, enabling free acid above the battery partition plate to enter the acid return barrel through the acid extraction pipe, and enabling the air pressure inside the battery to be in a negative pressure state required by the process; after maintaining for 3-5s, loosening the fingers on the upper end of the air passage, allowing air outside the battery to enter the battery through the air passage, and recovering the normal pressure inside the battery, wherein the operation is carried out for 2-3 times in total;
step d: pulling out the adapter, placing the battery on the scale, reading the value of the scale and recording the value as M1;
Step e: opening an acid discharge port on an acid return barrel, taking a small amount of acid, measuring the density and temperature of the acid by using a rapid density tester, converting the density into the density at 25 ℃, and recording the density as p;
step f: the adapter is inserted into the acid injection nozzle again to block the upper end of the air passage, so that the interior of the battery is in a negative pressure state, the negative pressure state is maintained for 5-7s, the electromagnetic valve is operated, the acid return pipe is opened, the acid pumping pipe is closed, the balance pipe is opened, acid in the acid return barrel enters the interior of the battery through the acid return pipe under the action of air pressure, and the upper end of the air passage is opened slowly;
step g: operating the electromagnetic valve, closing the balance pipe, opening the acid pumping pipe, closing the acid return pipe, pumping air by the air pumping pipe, and pumping free acid above the AGM partition plate into the acid return barrel under normal pressure;
step h: placing the battery on the scale, reading the scale and recording as M2;
step i: calculating the weight saturation, wherein the weight saturation is = [ G- (M2-M1) ]/G100%, wherein G is the acid-containing weight of the single lattice process, and is the theoretical acid-containing weight when the saturation of the acid in the cell is 100%;
step j: calculating the volume saturation, wherein the volume saturation is = [ V- (M2-M1)/p ]/V100%, wherein V is the acid-containing volume of the single lattice process, and V is the volume theoretical value corresponding to G;
step k: and judging whether the product is qualified or not according to the calculated weight saturation and volume saturation.
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