CN212007656U - Battery box electrolyte leakage detection device - Google Patents
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- CN212007656U CN212007656U CN202020280516.7U CN202020280516U CN212007656U CN 212007656 U CN212007656 U CN 212007656U CN 202020280516 U CN202020280516 U CN 202020280516U CN 212007656 U CN212007656 U CN 212007656U
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Abstract
The utility model relates to a battery box electrolyte leakage detection device, which comprises an air supply system and an electrolyte leakage detection system which are respectively connected with a detected piece; the gas supply system comprises a gas source, a first valve and a pressure sensor which are sequentially connected in series; the electrolyte leakage detection system is connected between the pressure sensor and the tested piece and comprises a third valve and a PID sensor which are sequentially connected, and according to different requirements, the electrolyte leakage detection system can be further provided with a humidity detection system or a test gas tank and a fifth valve are additionally arranged in the electrolyte leakage detection system. The utility model detects the gas humidity before the PID sensor tests, and can directly clean the PID sensor by utilizing the clean air generated by the air source, thereby prolonging the service life of the PID sensor; the PID sensor tests the gas temporarily stored in the testing gas tank, the detection accuracy is higher for each batch of gas, and the specific concentration of the electrolyte can be calculated.
Description
Technical Field
The utility model relates to an electrolyte leakage detection technical field especially relates to a battery box electrolyte leakage detection device.
Background
With the development of polymer battery technology and the continuous improvement of customer requirements, liquid leakage becomes a difficult point for controlling the quality of a polymer battery and is also a carrier of the core competitiveness of product quality, and under the conditions of cracking of an aluminum-plastic package, poor sealing performance of packaging and corrosion cracking of the polymer lithium ion battery, internal electrolyte flows out, and meanwhile, air outside enters the battery to cause the phenomenon of battery air blowing. Therefore, how to prevent the leakage of the electrolyte becomes an important aspect of competition for each battery manufacturer.
In order to prevent the leakage of electrolyte in the polymer battery, the packaging method is improved to improve the sealing performance of the package and the method for detecting the leakage is improved. The existing method for detecting the leakage comprises appearance detection, vacuum detection and leakage substance detection, wherein the appearance detection depends on the detection capability of detection personnel, the vacuum detection is to vacuumize the battery by utilizing the air blowing characteristic of the leakage battery, a larger differential pressure is formed outside the leakage battery, the electrolyte possibly flows out of the battery along with the internal generated gas, and then the appearance detection is carried out. The appearance detection and the vacuum detection both have the problem of low detection rate.
The electrolyte leakage detector is used for detecting leakage materials, for example, a negative pressure formation automatic detection system of a lithium battery disclosed in the patent No. CN108091817A, comprises a plurality of independent guide pipes which are independently connected with a battery main guide pipe, wherein the front ends of the independent guide pipes are fixedly provided with negative pressure formation suction nozzle bodies which are pressed and sucked on the upper surface of a battery liquid injection port of a lithium battery body to be formed; and a pressure sensor and a flowmeter are arranged in the battery main guide pipe and are connected with the PLC control system through signal lines.
The electrolyte leakage detector mainly adopts a negative pressure pump suction type detection method, and has the following defects: (1) the tested piece has an explosion-proof membrane of a gas injection port, a pump suction type air pipe cannot extend into the box body, the use is inconvenient, and the test result has deviation; (2) the suction detection method of the negative pressure pump cannot accurately set the negative pressure value, so that the negative pressure is easily overlarge, and the air-tight structure of a detected piece can be damaged; (3) the getter pump works for a long time, is easy to damage, and has high use cost for users; (4) the pump suction type detector has no self-cleaning function of the PID sensor, after the pump suction type detector is used for a long time, the PID sensor is easy to generate poisoning, and a test result has deviation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the electrolyte leakage detector in the prior art has defects, and the battery box electrolyte leakage detector is designed.
In order to achieve the purpose, the utility model provides a technical scheme does:
the utility model relates to a battery box electrolyte leakage detection device, which comprises an air supply system and an electrolyte leakage detection system which are respectively connected with a detected piece; the gas supply system comprises a gas source, a first valve and a pressure sensor, wherein the gas source, the first valve and the pressure sensor are sequentially connected in series; the electrolyte leakage detection system is respectively connected with the pressure sensor and the tested piece, and comprises a third valve and a PID sensor, wherein the third valve and the PID sensor are sequentially connected, and the PID sensor is used for detecting the electrolyte leakage condition of the tested piece.
Preferably, the gas supply system further comprises a buffer gas tank and a second valve, and the buffer gas tank and the second valve are sequentially connected between the first valve and the pressure sensor. Through the alternative switch of first valve and second valve, buffer the gas that the air supply produced earlier in the buffer gas jar, fill the measured piece with the air in the buffer gas jar again in, the gaseous input is more stable in the measured piece, is favorable to protecting the measured piece and does not receive the harm.
Preferably, the electrolyte leakage detection system is further provided with a humidity detection system, the humidity detection system is respectively connected with the pressure sensor and the detected piece, and the humidity detection system comprises a fourth valve and a humidity sensor, wherein the fourth valve is sequentially connected in series, and the humidity sensor is used for detecting the humidity of gas in the detected piece. Before electrolyte leakage detection system detects gas, earlier detect gaseous humidity with humidity detection system, carry out electrolyte leakage detection again after humidity detects the coincidence requirement, prevent that the steam in the gas from causing the harm to the PID sensor, further increase the life of PID sensor.
Preferably, the air outlet ends of the electrolyte leakage detection system and the humidity detection system are connected with each other and connected with a silencer. The muffler is used for preventing excessive noise generated when the detection gas is discharged.
Preferably, the electrolyte leakage detection system further comprises a test gas tank and a fifth valve, the test gas tank and the fifth valve are sequentially connected with the PID sensor in series, and the tail end of the electrolyte leakage detection system is connected with a silencer. The third valve and the fifth valve are alternately switched on and off, the PID sensor tests the gas temporarily stored in the testing gas tank, the PID sensor has sufficient time to detect each batch of gas, the detection accuracy is higher, and the concentration of the electrolyte can be calculated through calculation.
Preferably, the battery box electrolyte leakage detection device is provided with a control system, and each valve is controlled to be switched by the control system.
Preferably, an automatic water drainer for draining water vapor in the gas generated by the gas source is further connected between the gas source and the first valve. Compressed gas generated by the gas source can carry water vapor after coming out, particularly, the water vapor content of the air compressor which does not drain water for a long time is very high, and the automatic water drainer is used for discharging the water vapor in the compressed air.
Preferably, an air inlet pressure reducing valve and a precise pressure regulating valve are further connected between the air source and the first valve. The air pressure reducing valve is used for reducing the air pressure when air enters the air supply system, the precise pressure regulating valve is used for precisely controlling the air pressure in the air supply system, and the air pressure reducing valve and the precise pressure regulating valve work in a cooperative mode to prevent the air pressure of the air entering the air supply system from being too large.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
1. the utility model discloses connected electrolyte leakage detection system between gas supply system and surveyed the piece, can open each valve after the use, utilize the clean air that the air supply system air supply generated directly to wash the PID sensor, equipment has self-cleaning function, and the PID sensor life-span can prolong.
2. The utility model relates to an electrolyte leakage detection system in the place ahead of PID sensor set up the third valve, the rear has set up test gas pitcher and fifth valve, when the test electrolyte leaks the condition, third valve and fifth valve switch in turn, the PID sensor test is kept in the gas in the test gas pitcher, consequently, to each batch of gas, the PID sensor all has sufficient time to detect, it is higher to detect the accuracy to can also calculate the concentration size of electrolyte through the calculation.
3. The utility model adopts two valves and a buffer gas tank, realizes the inflation and the accurate air pressure control of the workpiece through the alternate on-off of the valves, and has lower production cost, thereby greatly reducing the production cost; during detection, the structure of a detected piece does not need to be pretreated, and the detected piece is directly connected through a gas injection port tool, so that the operation is simple and convenient; the gas injection pressure is automatic, accurate and adjustable, and damage to the air-tight structure of the measured piece is reduced.
4. The utility model discloses can also dispose humidity detecting system, humidity detecting system connects between pressure sensor and surveyed the piece, and humidity detecting system is including the fourth valve and the humidity transducer who establish ties in proper order. Before electrolyte leakage detection system detects gas, earlier detect gaseous humidity with humidity detection system, carry out electrolyte leakage detection again after humidity detects the coincidence requirement, prevent that the steam in the gas from causing the harm to the PID sensor, further increase the life of PID sensor.
Drawings
FIG. 1 is a schematic configuration diagram of an electrolyte leakage detection device according to embodiment 1;
FIG. 2 is a schematic configuration diagram of an electrolyte leakage detecting apparatus according to embodiment 2;
FIG. 3 is a schematic configuration diagram of an electrolyte leakage detection apparatus according to embodiment 3;
fig. 4 is a schematic configuration diagram of an electrolyte leakage detection device according to embodiment 4.
Description of the drawings: the device comprises a gas source 1, an automatic drainer 2, an air inlet pressure reducing valve 3, a precision pressure regulating valve 4, a first valve 5, a buffer gas tank 6, a second valve 7, a pressure sensor 8, a tested part 9, a third valve 10, a PID sensor 11, a fourth valve 12, a humidity sensor 13, a silencer 14, a test gas tank 15 and a fourth valve 16.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Example 1
Referring to fig. 1, the battery box electrolyte leakage detection apparatus according to the present embodiment includes an air supply system and an electrolyte leakage detection system respectively connected to a measured object.
The gas supply system comprises a gas source 1, a first valve 5 and a pressure sensor 8 which are sequentially connected in series, the pressure sensor 8 adopts a Mike general pressure sensor MIK-P300, the electrolyte leakage detection system is connected between the pressure sensor 8 and a detected piece 9, the electrolyte leakage detection system comprises a third valve 10 and a PID sensor 11 which are sequentially connected, and the PID sensor 11 adopts a PID gas sensor of American AMETEK MOCON company.
The steps of adopting the battery box electrolyte leakage detection device to detect the electrolyte leakage are as follows:
s1: closing the third valve 10, opening the first valve 5, inflating the measured piece 9 by the gas source 1 until the pressure sensor 8 detects that the air pressure in the measured piece 9 reaches a set value, closing the first valve 5 and standing for a period of time to fully mix the gas in the measured piece 9 with the injected air;
s2: opening a third valve 10, enabling the mixed gas to flow out of the tested piece 9 and be discharged after passing through a PID sensor 11, and detecting whether electrolyte leaks by the PID sensor 11;
s3: after the detection is finished, the first valve 5 and the third valve 10 are opened, the air source 1 blows air to the PID sensor 11 directly, and the PID sensor 11 is cleaned.
Example 2
Referring to fig. 2, the battery box electrolyte leakage detection apparatus according to the present embodiment includes an air supply system and an electrolyte leakage detection system respectively connected to a measured object.
The gas supply system comprises a gas source 1, a first valve 5 and a pressure sensor 8 which are sequentially connected in series, wherein the pressure sensor 8 adopts a Mike general pressure sensor MIK-P300; an automatic water drainer 2, an air inlet pressure reducing valve 3 and a precise pressure regulating valve 4 are sequentially connected between an air source 1 and a first valve 5, compressed air generated by the air source 1 can carry water vapor after coming out, particularly, the air compressor without water drainage for a long time has very large water vapor content, the automatic water drainer 2 is used for discharging the water vapor in the compressed air, the air inlet pressure reducing valve 3 adopts an RPT (resilient pressure transducer) balanced pressure reducing valve or an RW (RW) stainless steel pressure reducer, the precise pressure regulating valve 4 adopts a ZDLN (z digital micromirror network) electronic type double-seat electric regulating valve or an ZZYP (ZZYP type self-operated pressure regulating valve), the air inlet pressure reducing valve 3 is used for reducing the air pressure when the air enters an air supply system, the precise pressure regulating valve 4 is used for precisely controlling the air pressure in the air supply; the buffer gas tank 6 and the second valve 7 are sequentially connected between the first valve 5 and the pressure sensor 8, gas generated by the gas source 1 is buffered in the buffer gas tank 6 through the alternate opening and closing of the first valve 5 and the second valve 7, then air in the buffer gas tank 6 is filled into the tested piece 9, the gas input in the tested piece 9 is more stable, the tested piece 9 is further protected, and the tested piece 9 is not damaged.
The electrolyte leakage detection system is connected between the pressure sensor 8 and the tested piece 9 and comprises a third valve 10 and a PID sensor 11 which are sequentially connected, the PID sensor 11 adopts a PID gas sensor of American AMETEK MOCON company, and a silencer 14 is further arranged at the gas outlet end of the PID sensor 11 and used for reducing noise generated during gas discharge.
The steps of adopting the battery box electrolyte leakage detection device to detect the electrolyte leakage are as follows:
s1.1: closing the third valve 10 and the second valve 7, adjusting the air inlet pressure reducing valve 3 and the precision pressure regulating valve 4, firstly inflating the buffer air tank 6 with the air source 1, and removing water vapor from the air through the automatic water drainer 2;
s1.2: closing the first valve 4 and opening the second valve 7, inflating the tested piece 9 by the buffer gas tank 6, and detecting the gas pressure of the gas in the tested piece 9 by the pressure sensor 8;
s1.3: judging whether the air pressure in the tested piece 9 detected by the pressure sensor 8 reaches a set value or not, if not, repeating the steps S1.1 and S1.2, and alternately switching on and off the first valve 5 and the second valve 7 to ensure that the air source 1 inflates the tested piece 9 through the buffer air tank 6 to reach a preset air pressure, and if so, closing the first valve 5 and the second valve 7 and standing for a period of time to fully mix the air in the tested piece 9 with the injected air;
s2: opening a third valve 10, enabling the mixed gas to flow out of the tested piece 9 and be discharged after passing through a PID sensor 11, and detecting whether electrolyte leaks by the PID sensor 11;
s3: after the detection is finished, the first valve 5 and the third valve 10 are opened, the air source 1 blows air to the PID sensor 11 directly, and the PID sensor 11 is cleaned.
Compared with the embodiment 1, the automatic water drainer 2 is added, so that water vapor of air generated by an air source can be discharged, and the damage of the water vapor to the PID sensor 11 is reduced; the air inlet pressure reducing valve 3 and the tight pressure regulating valve 4 are added, so that the inflation pressure can be accurately controlled; buffer gas jar 6 has been increased, and through alternate switch first valve 5 and second valve 7, the air supply is aerifyd to buffer gas jar 6 earlier, is aerifyd to the piece 9 of being surveyed by buffer gas jar 6 again, and it is more stable to be surveyed the piece and aerify, reduces the damage of air current to the piece 9 of being surveyed.
Example 3
Referring to fig. 3, the electrolyte leakage detecting device of the tank includes an air supply system and an electrolyte leakage detecting system respectively connected to a tested member.
The gas supply system comprises a gas source 1, a first valve 5 and a pressure sensor 8 which are sequentially connected in series, wherein the pressure sensor 8 adopts a Mike general pressure sensor MIK-P300; an automatic water drainer 2, an air inlet pressure reducing valve 3 and a precise pressure regulating valve 4 are sequentially connected between an air source 1 and a first valve 5, compressed air generated by the air source 1 can carry water vapor after coming out, particularly, the air compressor without water drainage for a long time has very large water vapor content, the automatic water drainer 2 is used for discharging the water vapor in the compressed air, the air inlet pressure reducing valve 3 adopts an RPT (resilient pressure transducer) balanced pressure reducing valve or an RW (RW) stainless steel pressure reducer, the precise pressure regulating valve 4 adopts a ZDLN (z digital micromirror network) electronic type double-seat electric regulating valve or an ZZYP (ZZYP type self-operated pressure regulating valve), the air inlet pressure reducing valve 3 is used for reducing the air pressure when the air enters an air supply system, the precise pressure regulating valve 4 is used for precisely controlling the air pressure in the air supply; the buffer gas tank 6 and the second valve 7 are sequentially connected between the first valve 5 and the pressure sensor 8, gas generated by the gas source 1 is buffered in the buffer gas tank 6 through the alternate opening and closing of the first valve 5 and the second valve 7, then air in the buffer gas tank 6 is filled into the tested piece 9, the gas input in the tested piece 9 is more stable, the tested piece 9 is further protected, and the tested piece 9 is not damaged.
The electrolyte leakage detection system is connected between the pressure sensor 8 and the tested piece 9 and comprises a third valve 10 and a PID sensor 11 which are sequentially connected, the PID sensor 11 adopts a PID gas sensor of American AMETEK MOCON company, and a silencer 14 is further arranged at the gas outlet end of the PID sensor 11 and used for reducing noise generated during gas discharge.
Electrolyte leakage detection system still be furnished with humidity detecting system, humidity detecting system connects between pressure sensor 8 and surveyed 9, humidity detecting system is including fourth valve 12 and humidity transducer 13 that establish ties in proper order, humidity transducer 13 adopts HM1500LF temperature and humidity transducer, humidity detecting system's the end of giving vent to anger also is equipped with silencer 14, but humidity detecting system and electrolyte leakage detection system's the end of giving vent to anger interconnect and a silencer 14 of sharing, reduce the cost of equipment.
The steps of adopting the battery box electrolyte leakage detection device to detect the electrolyte leakage are as follows:
s1.1: closing the third valve 10 and the second valve 7, adjusting the air inlet pressure reducing valve 3 and the precision pressure regulating valve 4, firstly inflating the buffer air tank 6 with the air source 1, and removing water vapor from the air through the automatic water drainer 2;
s1.2: closing the first valve 4 and opening the second valve 7, inflating the tested piece 9 by the buffer gas tank 6, and detecting the gas pressure of the gas in the tested piece 9 by the pressure sensor 8;
s1.3: judging whether the air pressure in the tested piece 9 detected by the pressure sensor 8 reaches a set value or not, if not, repeating the steps S1.1 and S1.2, and alternately switching on and off the first valve 5 and the second valve 7 to ensure that the air source 1 inflates the tested piece 9 through the buffer air tank 6 to reach a preset air pressure, and if so, closing the first valve 5 and the second valve 7 and standing for a period of time to fully mix the air in the tested piece 9 with the injected air;
s2.1: opening the fourth valve 12, enabling the mixed gas to flow out of the tested piece 9, discharging the mixed gas after passing through the fourth valve 12 and the humidity sensor 13, detecting the humidity in the mixed gas by the humidity sensor 13, and if the humidity is larger than a threshold value, emptying the mixed gas and stopping detection; if the humidity is smaller than the threshold value, S2.2 is entered;
s2.2: closing the fourth valve 12, opening the third valve 10, allowing the mixed gas to flow out of the tested piece 9, discharging the mixed gas after passing through the PID sensor 11, and detecting whether the electrolyte leaks by the PID sensor 11;
s3: after the detection is finished, the first valve 5 and the third valve 10 are opened, the air source 1 blows air to the PID sensor 11 directly, and the PID sensor 11 is cleaned.
Compared with the embodiment 2, the embodiment is further provided with a humidity detection system, before electrolyte leakage condition detection is carried out on gas by the PID sensor 11, the humidity of mixed gas in the detected piece 9 is detected by the humidity detection system, the electrolyte leakage detection is carried out after the humidity detection meets the composite requirement, the PID sensor 11 is protected, the service life of the PID sensor 11 is prolonged, and the maintenance cost is reduced.
Example 4
Referring to fig. 4, the battery box electrolyte leakage detection apparatus according to the present embodiment includes an air supply system and an electrolyte leakage detection system respectively connected to a measured object.
The gas supply system comprises a gas source 1, a first valve 5 and a pressure sensor 8 which are sequentially connected in series, wherein the pressure sensor 8 adopts a Mike general pressure sensor MIK-P300; an automatic water drainer 2, an air inlet pressure reducing valve 3 and a precise pressure regulating valve 4 are sequentially connected between an air source 1 and a first valve 5, compressed air generated by the air source 1 can carry water vapor after coming out, particularly, the air compressor without water drainage for a long time has very large water vapor content, the automatic water drainer 2 is used for discharging the water vapor in the compressed air, the air inlet pressure reducing valve 3 adopts an RPT (resilient pressure transducer) balanced pressure reducing valve or an RW (RW) stainless steel pressure reducer, the precise pressure regulating valve 4 adopts a ZDLN (z digital micromirror network) electronic type double-seat electric regulating valve or an ZZYP (ZZYP type self-operated pressure regulating valve), the air inlet pressure reducing valve 3 is used for reducing the air pressure when the air enters an air supply system, the precise pressure regulating valve 4 is used for precisely controlling the air pressure in the air supply; the buffer gas tank 6 and the second valve 7 are sequentially connected between the first valve 5 and the pressure sensor 8, gas generated by the gas source 1 is buffered in the buffer gas tank 6 through the alternate opening and closing of the first valve 5 and the second valve 7, then air in the buffer gas tank 6 is filled into the tested piece 9, the gas input in the tested piece 9 is more stable, the tested piece 9 is further protected, and the tested piece 9 is not damaged.
The electrolyte leakage detection system is connected between the pressure sensor 8 and the tested piece 9, the electrolyte leakage detection system comprises a third valve 10 and a PID sensor 11 which are connected in sequence, the PID sensor 11 adopts a PID gas sensor of American AMETEK MOCON company, the electrolyte leakage detection system further comprises a test gas tank 15 and a fifth valve 16, the test gas tank 15 and the fifth valve 16 are connected in series with the PID sensor 11 in sequence, and a silencer 14 is further arranged at the tail end of the electrolyte leakage detection system and used for reducing noise generated during gas discharge.
The steps of adopting the battery box electrolyte leakage detection device to detect the electrolyte leakage are as follows:
s1.1: closing the third valve 10 and the second valve 7, adjusting the air inlet pressure reducing valve 3 and the precision pressure regulating valve 4, firstly inflating the buffer air tank 6 with the air source 1, and removing water vapor from the air through the automatic water drainer 2;
s1.2: closing the first valve 4 and opening the second valve 7, inflating the tested piece 9 by the buffer gas tank 6, and detecting the gas pressure of the gas in the tested piece 9 by the pressure sensor 8;
s1.3: judging whether the air pressure in the tested piece 9 detected by the pressure sensor 8 reaches a set value or not, if not, repeating the steps S1.1 and S1.2, and alternately switching on and off the first valve 5 and the second valve 7 to ensure that the air source 1 inflates the tested piece 9 through the buffer air tank 6 to reach a preset air pressure, and if so, closing the first valve 5 and the second valve 7 and standing for a period of time to fully mix the air in the tested piece 9 with the injected air;
s2.1: the gas in the tested piece 9 is fully mixed with the injected air, and the pressure sensor 8 records the pressure value P1；
S2.2: the third valve 10 is opened and the fifth valve 16 is closed, and part of the gas inside the tested piece 9 flows into the test gas tank 15 through the third valve 10, and at this time, the pressure sensor 8 detects that the pressure value is P2 nThe PID sensor 11 detects the gas in the test gas tank, and the concentration value of the electrolyte detected this time is KnWhere n is the current number of times the PID sensor 11 detects the gas;
s2.3: after the PID sensor 11 detects the gas in the test gas tank for a period of time, the third valve 10 is closed and the fifth valve 16 is opened, and the gas to be detected in the test gas tank 15 is discharged through the fifth valve 16;
s2.3, the pressure sensor records the air pressure value P in the tested piece 9 after the first detection2 n，n＝1Successively recording pressure values P according to the pressure sensor1And P2 n，n＝1And the volume of the test gas tank 15 is V2Calculating the volume V of the measured part1Wherein the volume of the test gas tank 15 is V2For the known data, the volume of the test gas tank 15, the volume V of the piece to be tested, is selected before the assembly of the test device1The gas equation is calculated according to the following formula:
(P1*V1)/T1＝[P2 n，n＝1*(V1+V2)]/T2，
wherein, T1Is the temperature, T, of the gas in the test piece after standing in step S42T is the temperature of the gas in the tested piece after the gas first flows into the test gas tank in step S51≈T2；
Thus, P1*V1＝P2 n，n＝1*(V1+V2)；
S2.4: continuously measuring the air pressure in the tested piece by the pressure sensor, if the air pressure value in the tested piece is greater than 0Pa, repeating the steps S2.2 and S2.3, if the air pressure value in the tested piece is 0Pa, stopping detection, calculating the concentration value of the electrolyte at the standard atmospheric pressure and the normal temperature, wherein the normal temperature is 20 ℃, and the concentration value of the electrolyte is K20，
Wherein, KmRefers to the last measured value, P, of the PID sensor20The air pressure value is the air pressure value when the ambient temperature is 20 ℃;
s3: after the detection is finished, the first valve 5 and the third valve 10 are opened, the air source 1 blows air to the PID sensor 11 directly, and the PID sensor 11 is cleaned.
Compared with embodiment 2, the present embodiment can not only detect whether there is leakage of the electrolyte in the tested piece 9, but also obtain the volume of the tested piece and the concentration of the electrolyte leakage by calculation.
In the embodiments 1 to 4, each valve is controlled by the control system; the time for fully mixing the air inside the tested piece 9 and the injected air is also controlled by the control system, and the testing personnel sets the time in the control system before testing.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. The utility model provides a battery box electrolyte leakage detection device which characterized in that: the device comprises an air supply system and an electrolyte leakage detection system which are respectively connected with a tested piece; the gas supply system comprises a gas source, a first valve and a pressure sensor, wherein the gas source, the first valve and the pressure sensor are sequentially connected in series; the electrolyte leakage detection system is respectively connected with the pressure sensor and the tested piece, and comprises a third valve and a PID sensor, wherein the third valve and the PID sensor are sequentially connected, and the PID sensor is used for detecting the electrolyte leakage condition of the tested piece.
2. The battery case electrolyte leakage detection device of claim 1, wherein: the gas supply system also comprises a buffer gas tank and a second valve, wherein the buffer gas tank and the second valve are sequentially connected between the first valve and the pressure sensor.
3. The battery case electrolyte leakage detection device of claim 1, wherein: electrolyte leakage detection system still be furnished with humidity detecting system, humidity detecting system is connected with pressure sensor and measured piece respectively, humidity detecting system is including the fourth valve that establishes ties in proper order and the humidity transducer who is used for detecting the interior gas humidity of measured piece.
4. The battery case electrolyte leakage detection device of claim 3, wherein: the air outlet ends of the electrolyte leakage detection system and the humidity detection system are connected with each other and connected with a silencer.
5. The battery case electrolyte leakage detection device of claim 1, wherein: electrolyte leak testing system still include test gas pitcher and fifth valve, test gas pitcher and fifth valve establish ties with the PID sensor in proper order, electrolyte leak testing system's end-to-end connection has the silencer.
6. The battery case electrolyte leakage detection device according to any one of claims 1 to 5, characterized in that: the battery box electrolyte leakage detection device is provided with a control system, and each valve is controlled to be switched by the control system.
7. The battery case electrolyte leakage detection device of claim 1, wherein: and an automatic drainer for discharging water vapor in the gas generated by the gas source is connected between the gas source and the first valve.
8. The battery case electrolyte leakage detection device of claim 1, wherein: and an air inlet pressure reducing valve and a precise pressure regulating valve are also connected between the air source and the first valve.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117053091A (en) * | 2023-09-12 | 2023-11-14 | 上海邦盟成套电气有限公司 | High-precision high-low pressure nitrogen gas inflation equipment and inflation method |
| CN117191183A (en) * | 2023-11-07 | 2023-12-08 | 宁德时代新能源科技股份有限公司 | Abnormal sound detection method, device, equipment, electronic equipment and readable storage medium |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117053091A (en) * | 2023-09-12 | 2023-11-14 | 上海邦盟成套电气有限公司 | High-precision high-low pressure nitrogen gas inflation equipment and inflation method |
| CN117053091B (en) * | 2023-09-12 | 2024-03-12 | 上海邦盟成套电气有限公司 | High-precision high-low pressure nitrogen gas inflation equipment and inflation method |
| CN117191183A (en) * | 2023-11-07 | 2023-12-08 | 宁德时代新能源科技股份有限公司 | Abnormal sound detection method, device, equipment, electronic equipment and readable storage medium |
| CN117191183B (en) * | 2023-11-07 | 2024-03-26 | 宁德时代新能源科技股份有限公司 | Abnormal sound detection method, device, equipment, electronic equipment and readable storage medium |
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