CN107515111B - Storage battery valve testing device and storage battery valve detection method - Google Patents
Storage battery valve testing device and storage battery valve detection method Download PDFInfo
- Publication number
- CN107515111B CN107515111B CN201710765079.0A CN201710765079A CN107515111B CN 107515111 B CN107515111 B CN 107515111B CN 201710765079 A CN201710765079 A CN 201710765079A CN 107515111 B CN107515111 B CN 107515111B
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- storage battery
- air
- valve
- battery valve
- air pressure
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title description 5
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 18
- 239000000428 dust Substances 0.000 claims description 6
- 229940099259 vaseline Drugs 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention relates to the technical field of storage batteries, in particular to a storage battery valve testing device. The battery valve testing device comprises: the air pump is communicated with the air cavity through a channel, and the CPU is connected with the air pump and the air pressure sensor. The device can directly test the storage battery valve without taking the storage battery valve off the storage battery, and the method is simple, convenient and easy to operate.
Description
Technical Field
The invention relates to the technical field of storage batteries, in particular to a storage battery valve testing device and a storage battery valve detection method.
Background
The valve-regulated lead-acid battery has gradually replaced the traditional open-type lead-acid battery with the advantage of no need of 'maintenance' such as acid addition, water addition and the like. The valve-controlled sealed lead-acid battery has a safety valve, which has the main functions of keeping the battery in good air tightness and eliminating excessive pressure accumulated in the battery so as to prevent the shell expander from bursting. The working principle is that in the later stage of charging, when the amount of oxygen generated by the anode of the battery and the amount of hydrogen generated by the cathode are larger and are not equal to each other, the internal pressure of the battery rises, the safety valve is automatically opened when the internal pressure rises to a certain value, and when the internal pressure after the exhaust is reduced to a certain value, the safety valve is automatically closed.
Airtight function of safety valve: the internal pressure of the storage battery is kept to be certain, which is helpful for the smooth proceeding of the internal oxygen circulation; preventing oxygen in the atmosphere from entering the storage battery, so that the capacity of the storage battery is reduced; poor sealing of the storage battery leads to increased water loss and influences the service life of the storage battery.
Venting function of the safety valve: because the separation of hydrogen cannot be completely avoided, the internal pressure is accumulated to a certain extent and needs to be discharged in time, so that the expansion explosion of the shell is avoided; the recombination reaction of oxygen is exothermic reaction, and timely exhaust of the safety valve is beneficial to heat dissipation, so that heat accumulation and thermal runaway caused by temperature rise are avoided.
The normal use of the safety valve has absolute influence on the service performance and service life of the storage battery, however, in actual use, the safety valve can be gradually aged under the condition of acidic high temperature, so that the following two conditions are caused:
(1) If the valve opening pressure is excessively increased and the charging current is unstable, the battery is deformed, cracked and even exploded due to thermal runaway;
(2) The valve is normally opened due to the fact that the valve opening pressure is too low, the valve control function cannot be fully exerted, the negative electrode oxygen recombination capacity is greatly reduced, serious desiccation and dryness are caused, and the valve fails in advance.
At present, the detection of the safety valve in the process of the operation and maintenance of the storage battery still stays in visual inspection or judgment of the quality condition of the safety valve by experience. For an instrument for accurately testing the valve opening pressure value and the valve closing pressure value of the safety valve, a special testing instrument is required to be used for detecting after the safety valve is taken down. The workload of operation and maintenance personnel is increased, and the risk of damaging the safety valve in the valve taking or installing process is increased.
Disclosure of Invention
The present invention overcomes at least one of the above-mentioned drawbacks of the prior art by providing a battery valve testing device that can detect a safety valve without removing it.
In order to solve the technical problems, the technical scheme of the invention is as follows: a battery valve testing apparatus comprising: the air pump is communicated with the air cavity through a channel, and the CPU is connected with the air pump and the air pressure sensor. The device can directly test the storage battery valve without taking the storage battery valve off the storage battery, and the method is simple, convenient and easy to operate.
Further, the testing device comprises a display, and the display is connected with the CPU. The sensor feeds back the air pressure value to the CPU, the CPU transmits the data to the display, and operators can observe the data fed back by the CPU at any time.
Further, the CPU comprises an input module, a calculation module and an output module, wherein the input module is connected with the calculation module, the calculation module is connected with the output module, the pressure sensor is connected with the input module, and the air pump is connected with the output module.
Further, the input module is connected with the display. Preferably, the display is a display screen, and may also be an instrument.
Further, the sealing cover is a rubber sealing cover, and the channel is a rubber tube.
Further, the sealing cover covers the storage battery valve after coating vaseline on the contact surface of the sealing cover and the storage battery. The tightness of the device is ensured.
The method for testing the storage battery valve is characterized by comprising the following steps of:
s01: wiping dust around the storage battery valve with rag, uniformly smearing vaseline on the contact interface of the dust and the storage battery cover, and covering the storage battery valve to seal the storage battery valve;
s02: starting the test, controlling the air pump to pump air by the CPU, gradually reducing the air pressure in the air cavity, opening a valve when the air pressure is reduced to P1, releasing the air in the storage battery when the valve is opened, detecting the abrupt increase of the air pressure by the air pressure sensor, recording the air pressure value P1 by the CPU through the air pressure sensor, and controlling the air pump to stop pumping air;
s03: after the valve is opened, the air pressure in the air cavity is gradually increased, after the air pressure reaches P2, the storage battery valve is closed, the air pressure in the air cavity is stable, and the air pressure P2 is recorded;
s04: P2-P1 is the closing pressure value of the accumulator valve;
s05: the CPU controls the air pump to work continuously, the pressure of the air cavity is reduced continuously, the storage battery valve is opened for the second time, the pressure of the air pressure sensor is suddenly changed, and the CPU records the suddenly changed pressure value P3;
s06: P2-P3 are the opening pressure values of the accumulator valve.
Further, if the process of the abrupt increase of the gas pressure does not occur in step S02, it is judged that the battery valve is failed.
Further, if the gas pressure drop rate is lower than the normal rate range during the test, the test is stopped and the device tightness is checked. Thereby ensuring the safety of the operation.
After the detection is started, the pressure value is fed back on the display at any time by the air pressure sensor, and can be fed back on the display in a scatter diagram mode, so that a detector can observe the change state of the pressure at any time, and once the pressure value is fed back abnormally, the detector can be timely found out, and the instrument is adjusted.
Compared with the prior art, the beneficial effects are that: the device does not need to take the storage battery valve off the storage battery and test the storage battery valve, so that the operation is more convenient and concise; and can find the abnormal phenomenon of the device at any time.
Drawings
Fig. 1 is a block diagram of a constituent system of the present invention.
FIG. 2 is a graph of the pressure trend of the air chamber during operation of the test device.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
As shown in fig. 1 and 2, a battery valve testing device includes: the air pump is characterized by comprising a sealing cover 1, an air cavity 4, an air pressure sensor 3, an air pump 5 and a CPU, wherein the sealing cover 1 is covered on a storage battery valve 6 and is sealed and fixed, a cavity is formed between the sealing cover 1 and the storage battery valve 6, the air cavity 4 is communicated with the sealing cover 1 through a channel, the air pressure sensor 3 is arranged in the air cavity 4, the air pump 5 is communicated with the air cavity 4 through the channel, and the CPU is connected with the air pump 5 and the air pressure sensor 4. After the device is connected, the battery valve is enclosed in a sealed cavity. The accumulator valve 6 can be detected without being taken off from the accumulator 8, and the method is simple, reliable and easy to operate.
The testing device comprises a display, and the display is connected with the CPU.
The CPU can comprise an input module, a calculation module and an output module, wherein the input module is connected with the calculation module, the calculation module is connected with the output module, the pressure sensor is connected with the input module, and the air pump is connected with the output module. The input module is connected with the display.
The sealing cover 1 can be a rubber sealing cover, and the channel can be a rubber tube.
The sealing cover 1 can be covered on the storage battery valve 6 after coating vaseline on the contact surface with the storage battery, so as to ensure the tightness of the storage battery valve.
A method for testing a battery valve, comprising the steps of:
s01: wiping dust around the storage battery valve with rag, uniformly smearing vaseline on the contact interface of the dust and the storage battery cover, and covering the storage battery valve to seal the storage battery valve;
s02: starting the test, controlling the air pump to pump air by the CPU, gradually reducing the air pressure in the air cavity, opening a valve when the air pressure is reduced to P1, releasing the air in the storage battery when the valve is opened, detecting the abrupt increase of the air pressure by the air pressure sensor, recording the air pressure value P1 by the CPU through the air pressure sensor, and controlling the air pump to stop pumping air;
s03: after the valve is opened, the air pressure in the air cavity is gradually increased, after the air pressure reaches P2, the storage battery valve is closed, the air pressure in the air cavity is stable, and the air pressure P2 is recorded;
s04: P2-P1 is the closing pressure value of the accumulator valve;
s05: the CPU controls the air pump to work continuously, the pressure of the air cavity is reduced continuously, the storage battery valve is opened for the second time, the pressure of the air pressure sensor is suddenly changed, and the CPU records the suddenly changed pressure value P3;
s06: P2-P3 are the opening pressure values of the accumulator valve.
If the abrupt increase in gas pressure does not occur in step S02, it is determined that the battery valve is failed.
If the gas pressure drop rate is lower than the normal rate range during the test, the test is stopped and the device tightness is checked.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. The method for testing the storage battery valve is characterized by comprising the following steps of:
s01: the dust around the storage battery valve (6) is wiped by rag, and the contact interface of the dust and the sealing cover (1) is evenly coated with vaseline and then covered on the storage battery valve (6) to seal the storage battery valve; after the sealing cover (1) covers the storage battery valve (6) and is sealed and fixed, a cavity is formed between the sealing cover (1) and the storage battery valve (6);
s02: starting a test, controlling the air pump (5) to pump air by the CPU (7), gradually reducing the air pressure in the air cavity (4), opening the storage battery valve (6) when the air pressure is reduced to P1, releasing the air in the storage battery when the storage battery valve (6) is opened, detecting the abrupt increase of the air pressure by the air pressure sensor (3), recording the air pressure value P1 by the CPU (7) through the air pressure sensor (3), and controlling the air pump (5) to stop pumping; the air cavity (4) is communicated with the sealing cover (1) through a channel, the air pressure sensor (3) is arranged in the air cavity (4), the air pump (5) is communicated with the air cavity (4) through the channel, and the CPU (7) is connected with the air pump (5) and the air pressure sensor (3);
s03: after the storage battery valve (6) is opened, the air pressure in the air cavity (4) is gradually increased, after the air pressure reaches P2, the storage battery valve (6) is closed, the air pressure of the air cavity (4) is stable, and the air pressure P2 is recorded;
s04: P2-P1 is the valve-closing pressure value of the accumulator valve (6);
s05: the CPU (7) controls the air pump (5) to continuously work, the pressure of the air cavity (4) continuously drops, the storage battery valve (6) is opened for the second time, the pressure of the air pressure sensor (3) is suddenly changed, and the CPU (7) records the suddenly changed pressure value P3;
s06: P2-P3 are the opening pressure values of the accumulator valve (6).
2. The test method according to claim 1, wherein: if the process of the abrupt increase of the gas pressure does not occur in the step S02, it is judged that the accumulator valve (6) is failed.
3. The test method according to claim 1, wherein: if the gas pressure drop rate is lower than the normal rate range during the test, the test is stopped and the device tightness is checked.
4. The test method according to claim 1, wherein: the CPU (7) is also connected with a display.
5. The method of testing according to claim 4, wherein: the CPU (7) comprises an input module, a calculation module and an output module, wherein the input module is connected with the calculation module, the calculation module is connected with the output module, the air pressure sensor is connected with the input module, and the air pump is connected with the output module.
6. The test method according to claim 5, wherein: the input module is connected with the display.
7. The test method according to claim 1, wherein: the sealing cover (1) is a rubber sealing cover, and the channel is a rubber tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710765079.0A CN107515111B (en) | 2017-08-30 | 2017-08-30 | Storage battery valve testing device and storage battery valve detection method |
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| CN201710765079.0A CN107515111B (en) | 2017-08-30 | 2017-08-30 | Storage battery valve testing device and storage battery valve detection method |
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| CN107515111A CN107515111A (en) | 2017-12-26 |
| CN107515111B true CN107515111B (en) | 2024-03-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107607301B (en) * | 2017-08-29 | 2020-01-17 | 中国信息通信研究院 | Detection device and detection method for safety valve of storage battery |
| CN108344540A (en) * | 2017-12-27 | 2018-07-31 | 肇庆理士电源技术有限公司 | A kind of test method and device of accumulator protection valve |
| CN109211562B (en) * | 2018-10-11 | 2020-10-30 | 天能电池集团股份有限公司 | Method and device for detecting aging performance of lead storage battery safety valve |
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