CN107783029B - Test system and test method for PCBA (printed circuit board assembly) - Google Patents
Test system and test method for PCBA (printed circuit board assembly) Download PDFInfo
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- CN107783029B CN107783029B CN201711146874.8A CN201711146874A CN107783029B CN 107783029 B CN107783029 B CN 107783029B CN 201711146874 A CN201711146874 A CN 201711146874A CN 107783029 B CN107783029 B CN 107783029B
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- pcba
- battery
- electronic cigarette
- relay
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 239000003571 electronic cigarette Substances 0.000 claims abstract description 52
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims abstract 21
- 238000001514 detection method Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 101001068634 Homo sapiens Protein PRRC2A Proteins 0.000 description 1
- 101000908580 Homo sapiens Spliceosome RNA helicase DDX39B Proteins 0.000 description 1
- 102100033954 Protein PRRC2A Human genes 0.000 description 1
- 102100024690 Spliceosome RNA helicase DDX39B Human genes 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a test system and a test method of an electronic cigarette PCBA. Four testing stations are effectively summarized in the same system by utilizing the large-range adaptability of the relay to the current. Meanwhile, the simple switching of the single/double battery charging modes is realized by the connection cooperation of the voltage dividing unit and the selection switch, and two sets of power supplies are not required. The invention can greatly save the matching of the jig and the labor cost, can extend out a test system for simultaneously testing two PCBA electronic cigarettes and more than two PCBA electronic cigarettes without creative labor based on the same conception of the invention, and can be applied to PCBA tests in other large current ranges.
Description
Technical Field
The invention relates to a test system of PCBA and a test method using the same, in particular to a test system and a test method of PCBA of electronic cigarette.
Background
PCBA is the abbreviation of English printedcustBoard+Assemblely, that is to say that the PCB blank is obtained after being subjected to SMT and then DIP plug-in, and is abbreviated as PCBA. The method is a common writing method in China, and the standard writing method in Europe and America is PCB' A. The PCBA testing method in the industry generally comprises the steps of firstly testing circuit functions, then testing full power aging, then testing charging, and finally testing static current. The test of the same PCBA requires four stations and four sets of test jigs, so that the labor cost is high and the efficiency is low. If several stations are to be integrated into one station, switching of the test circuit by means of a switch is required. Stable, high-power, voltage-adjustable and current/voltage value-readable direct current power supplies are needed for power supply in circuit function test and full-power aging test; in the charging test and the static current test, an external battery or a battery pack is required to be used as a charging object of the electronic cigarette PCBA.
However, the PCBA of the electronic cigarette has high power, and the working current generally reaches 1-40A. The normal small-sized switch has large impedance and small overcurrent, generally can only reach about 15A, and is easy to damage after long-time work switching. In order to make the test more stable, only separate tests of each station can be adopted, so that the demand of PCBA production back-end processing personnel is increased. At least the model of single cell, double cell (series connection) power supply is had to electron cigarette PCBA, adopts DC power supply in test ageing link all: the product test of the single cell model adopts a power supply; the product test of the dual battery model requires two power supplies, thus the test is twice as much equipment.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a test system and a test method for PCBA of electronic cigarettes, which can solve the problems of station dispersion and incapability of switching of test circuits.
The invention adopts the following technical scheme:
the test system of the electronic cigarette PCBA comprises a first battery, a second battery and a direct current power supply, wherein the first battery and the second battery are connected in series;
the positive electrode of the direct current power supply is connected with any one input end of the relay group, and the output end of the selector switch is connected with the other input end of the relay group; the positive electrode of the direct current power supply is connected with the first input end of the relay group II through the voltage dividing unit, and the first input end of the selection switch is connected with the other input end of the relay group II; the first output end of the relay is used for connecting with the positive electrode of the input end of the electronic cigarette PCBA, and the second output end of the relay is used for connecting with the intermediate voltage detection end of the electronic cigarette PCBA; the negative electrode of the direct current power supply is grounded;
the first input end of the relay group connected with the output end of the selection switch and the second input end of the relay group connected with the first input end of the selection switch are both normally open points or both normally closed points;
the positive electrode of the first battery is connected with the second input end of the selection switch, and the negative electrode of the first battery is connected with the first input end of the selection switch and the positive electrode of the second battery; the negative electrode of the second battery is connected with an ammeter in series and then grounded; and the two ends of the ammeter are connected with normally closed switches in parallel.
Preferably, the first input end of the relay group connected with the output end of the selection switch and the second input end of the relay group connected with the first input end of the selection switch are both normally open points. Because the first step and the second step are performed with the power supply of the direct current power supply, and the test needs a long time, the two voltages of the direct current power supply are connected to the two normally closed points of the relay first, so that the electric quantity consumption of the relay can be saved, and the service life of the relay is prolonged.
Preferably, the voltage dividing unit comprises a first resistor and a second resistor which are connected in series and have equal resistance values; one end of the first resistor is connected with the positive electrode of the direct current power supply, and the other end of the second resistor is grounded; the serial connection point of the two resistors is a voltage division output end which is connected with the two input ends of the group. The output voltage of the positive electrode of the direct current power supply can be halved by utilizing any existing voltage dividing circuit and is input into the relay. The simple structure of the two resistors is beneficial to cost saving.
Preferably, a control switch is connected in series between the enabling end of the relay and the access power supply. The relay is conveniently powered on and powered off through the control switch, and the relay is not required to be powered on and plugged in an enabling mode.
Preferably, the normally closed switch is a manual push switch.
Preferably, the relay is a double-contact relay.
The test method of the test system using any one of the electronic cigarette PCBA is characterized by comprising the following steps:
a. connecting a load positive electrode and a load negative electrode of the PCBA in series with a load resistor, connecting an intermediate voltage detection end with two output ends of a relay group, connecting an input end positive electrode with a group one output end, and grounding an input end negative electrode; the voltmeter is connected in parallel with the two ends of the load resistor;
b. the state of the relay is controlled, so that the positive electrode of the direct current power supply and the voltage dividing unit respectively supply power to the PCBA of the electronic cigarette; adjusting the output voltage of the direct current power supply to perform circuit function test, reading the output current/voltage value of the direct current power supply and reading the value of a voltmeter;
c. adjusting the output voltage of the direct-current power supply to perform full-power aging test, and reading the output current/voltage value of the direct-current power supply and the value of a voltmeter;
d. closing the PCBA of the electronic cigarette; according to the model of the PCBA of the electronic cigarette, a selection switch is adjusted to control the access quantity of the battery;
e. switching the state of the relay to enable the second battery or the first battery and the second battery which are connected in series to supply power to the electronic cigarette PCBA, and at the moment, the electronic cigarette PCBA is electrified and started again; if the first battery and the second battery which are connected in series are powered, detecting the voltage value of the contact point of the first battery and the second battery by the intermediate voltage detection end of the PCBA; if the second battery is independently powered, the middle voltage detection end of the PCBA and the positive electrode of the input end are in the same point; the PCBA of the electronic cigarette is externally connected with a charging circuit to perform charging test;
f. and opening the normally closed switch, electrifying the ammeter, reading the value of the ammeter, and completing the static current test.
Compared with the prior art, the invention has the beneficial effects that: four testing stations are effectively summarized in the same system by utilizing the large-range adaptability of the relay to the current. Meanwhile, the simple switching of the single/double battery charging modes is realized by the connection cooperation of the voltage dividing unit and the selection switch, and two sets of power supplies are not required. The matching of the jig and the labor cost are greatly saved.
Drawings
Fig. 1 is a schematic circuit diagram of a test system of an electronic cigarette PCBA according to the present invention.
In the figure: r1-first resistor, R2-second resistor, re-load resistor, DC+ -DC power supply positive pole, DC+ -DC power supply negative pole, BAT 1-first battery, BAT 2-second battery, SW 1-selection switch, SW 2-control switch, K-normally closed switch, KT-relay, 1-group one normally closed input end, 2-group one output end, 3-group one normally open input end, 4-group two normally closed input ends, 5-group two output ends, 6-group two normally open input ends, DET-intermediate voltage detection end, B+ -input end positive pole, B+ -input end negative pole, CH+ -load positive pole, CH+ -load negative pole, V-voltmeter, uA-ammeter.
Detailed Description
The invention will be further described with reference to the accompanying drawings and detailed description below:
as shown in fig. 1, a detection system of an electronic cigarette PCBA according to the present invention includes a first battery BAT1 and a second battery BAT2 connected in series, a first electronic R1 and a second resistor R2 connected in series, a dc power supply, a relay KT, a selection switch SW1, a control switch SW2, and a normally closed switch K.
The positive pole DC+ of the direct current power supply is connected with a normally closed input end 1 of the relay KT group, the output voltage Vdc is output, and the output end of the selector switch is connected with a normally open input end 3 of the relay KT group. The positive electrode DC+ of the direct current power supply is grounded after passing through a first resistor R1 and a second resistor R2 which are sequentially connected in series; the voltage of 1/2Vdc which is always half of Vdc is obtained after the voltage is divided by the first resistor R1 and the second resistor R2 with the same resistance value and is output to the normally closed input end 4 of the relay group. The first input end of the selection switch is connected with the normally open input end 6 of the relay group II. The first output end 2 of the relay is used for connecting with the positive electrode of the input end of the electronic cigarette PCBA, and the second output end 5 of the relay is used for connecting with the intermediate voltage detection end of the electronic cigarette PCBA. The negative pole DC-ground of the direct current power supply. And a control switch SW2 is connected in series between the enabling end of the relay and the power supply DC-12V.
The positive electrode of the first battery is connected with the second input end of the selection switch, and the negative electrode of the first battery is connected with the first input end of the selection switch and the positive electrode of the second battery; the negative electrode of the second battery is connected with an ammeter uA in series and then grounded; and two ends of the ammeter are connected with a normally-closed switch K in parallel. The normally closed switch short-circuits the ammeter in a normal state, the service life of the ammeter is protected, the ammeter is only electrified when the normally closed switch is pressed down, and the normally closed switch is a manual pressing switch.
The invention relates to a test system of an electronic cigarette PCBA, which has the following working principle:
when the control switch is opened, the relay enabling end is powered off, the group one normally closed input end is communicated with the group one output end, and the group two normally closed input end is communicated with the group two output ends. At this time, the direct current power supply inputs voltage Vdc to the positive electrode B+ of the PCBA input end of the electronic cigarette and inputs voltage 1/2Vdc to the intermediate voltage detection end DET of the PCBA of the electronic cigarette. And connecting a load positive electrode CH+ and a load negative electrode CH-of the electronic cigarette PCBA in series with a load resistor Re, and connecting voltmeter V in parallel at two ends of the load resistor Re. The circuit function test and the full power burn-in test can be realized.
When the control switch is closed, the relay enabling end is electrified, the group I normally open input end is communicated with the group I output end, and the group II normally open input end is communicated with the group II output end. At this time, the second battery or the battery pack connected in series supplies power to the electronic cigarette PCBA. If the charging test is required, the external USB and the like can be utilized to supply power to the PCBA of the electronic cigarette, and then the PCBA of the electronic cigarette performs the charging test on the second battery or the battery pack.
Before the charging test, the number of the connected batteries is adjusted through a selection switch. When the selector switch is communicated with the first input end, the first battery is opened, and the second battery is singly connected into the intermediate voltage detection end and the input end anode of the electronic cigarette PCBA. When the selector switch is communicated with the second input end, the first battery is connected with the second battery in series; the total voltage of the battery pack is input to the positive electrode of the input end, and the intermediate voltage of the two batteries is input to the intermediate voltage detection end. The intermediate voltage detection end of the electronic cigarette PCBA is used for monitoring the charging condition during the double-battery charging test, so that overcharging is avoided.
The method for testing the PCBA of the electronic cigarette utilizes the testing system, and comprises the following steps:
a. connecting a load positive electrode and a load negative electrode of the PCBA in series with a load resistor, connecting an intermediate voltage detection end with two output ends of a relay group, connecting an input end positive electrode with a group one output end, and grounding an input end negative electrode; the voltmeter is connected in parallel with the two ends of the load resistor;
b. the state of the relay is controlled, so that the positive electrode of the direct current power supply and the voltage dividing unit respectively supply power to the PCBA of the electronic cigarette; adjusting the output voltage of the direct current power supply to perform circuit function test, reading the output current/voltage value of the direct current power supply and reading the value of a voltmeter;
c. adjusting the output voltage of the direct-current power supply to perform full-power aging test, and reading the output current/voltage value of the direct-current power supply and the value of a voltmeter;
d. closing the PCBA of the electronic cigarette; according to the model of the PCBA of the electronic cigarette, a selection switch is adjusted to control the access quantity of the battery; if the PCBA is the type of the single cell, the output end of the selection switch is communicated with the first input end; if the PCBA is of a double-battery type, the output end of the selection switch is communicated with the second input end;
e. switching the state of the relay to enable the second battery or the first battery and the second battery which are connected in series to supply power to the electronic cigarette PCBA, and at the moment, the electronic cigarette PCBA is electrified and started again; if the first battery and the second battery which are connected in series are powered, detecting the voltage value of the contact point of the first battery and the second battery by the intermediate voltage detection end of the PCBA; if the second battery is independently powered, the middle voltage detection end of the PCBA and the positive electrode of the input end are in the same point; the PCBA is externally connected with a charging circuit to perform charging test, and the charged object is an accessed second battery or a series battery pack;
f. and opening the normally closed switch, electrifying the ammeter, reading the value of the ammeter, and completing the static current test.
Based on the same conception of the invention, the test system for simultaneously testing two PCBA pieces and more than two PCBA pieces of electronic cigarettes can be extended without creative labor. Although the test system is used for various tests of the PCBA of the electronic cigarette, under the technical teaching of the conception of the invention, the test system and the test method can be applied to PCBA tests of other large current ranges without creative labor by a person skilled in the art, and the test system and the test method belong to the protection scope of the invention.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the appended claims.
Claims (6)
1. The test method of the test system of the electronic cigarette PCBA is characterized by comprising the following steps of:
a. connecting a load positive electrode and a load negative electrode of the PCBA in series with a load resistor, connecting an intermediate voltage detection end with two output ends of a relay group, connecting an input end positive electrode with a group one output end, and grounding an input end negative electrode; the voltmeter is connected in parallel with the two ends of the load resistor;
b. the state of the relay is controlled, so that the positive electrode of the direct current power supply and the voltage dividing unit respectively supply power to the PCBA of the electronic cigarette; adjusting the output voltage of the direct current power supply to perform circuit function test, reading the output current/voltage value of the direct current power supply and reading the value of a voltmeter;
c. adjusting the output voltage of the direct-current power supply to perform full-power aging test, and reading the output current/voltage value of the direct-current power supply and the value of a voltmeter;
d. closing the PCBA of the electronic cigarette; according to the model of the PCBA of the electronic cigarette, a selection switch is adjusted to control the access quantity of the battery;
e. switching the state of the relay to enable the second battery or the first battery and the second battery which are connected in series to supply power to the electronic cigarette PCBA, and at the moment, the electronic cigarette PCBA is electrified and started again; if the first battery and the second battery which are connected in series are powered, detecting the voltage value of the contact point of the first battery and the second battery by the intermediate voltage detection end of the PCBA; if the second battery is independently powered, the middle voltage detection end of the PCBA and the positive electrode of the input end are in the same point; the PCBA of the electronic cigarette is externally connected with a charging circuit to perform charging test;
f. opening the normally closed switch, electrifying the ammeter, reading the value of the ammeter, completing the static current test,
the test system of the electronic cigarette PCBA comprises a first battery, a second battery and a direct current power supply, wherein the first battery and the second battery are connected in series;
the positive electrode of the direct current power supply is connected with any one input end of the relay group, and the output end of the selector switch is connected with the other input end of the relay group; the positive electrode of the direct current power supply is connected with the first input end of the relay group II through the voltage dividing unit, and the first input end of the selection switch is connected with the other input end of the relay group II; the first output end of the relay is used for connecting with the positive electrode of the input end of the electronic cigarette PCBA, and the second output end of the relay is used for connecting with the intermediate voltage detection end of the electronic cigarette PCBA; the negative electrode of the direct current power supply is grounded;
the first input end of the relay group connected with the output end of the selection switch and the second input end of the relay group connected with the first input end of the selection switch are both normally open points or both normally closed points;
the positive electrode of the first battery is connected with the second input end of the selection switch, and the negative electrode of the first battery is connected with the first input end of the selection switch and the positive electrode of the second battery; the negative electrode of the second battery is connected with an ammeter in series and then grounded; and the two ends of the ammeter are connected with normally closed switches in parallel.
2. The method of claim 1, wherein the first input terminal of the relay set connected to the output terminal of the selection switch and the second input terminal of the relay set connected to the first input terminal of the selection switch are both normally open points.
3. The method for testing the system for testing the PCBA of the electronic cigarette according to claim 1, wherein the voltage dividing unit comprises a first resistor and a second resistor which are connected in series and have equal resistance values; one end of the first resistor is connected with the positive electrode of the direct current power supply, and the other end of the second resistor is grounded; the serial connection point of the two resistors is a voltage division output end which is connected with the two input ends of the group.
4. The method for testing the system for testing the PCBA of the electronic cigarette according to claim 1, wherein a control switch is connected in series between the enabling end of the relay and the access power supply.
5. The method for testing the system for testing the PCBA of the electronic cigarette according to claim 1, wherein said normally closed switch is a manual push switch.
6. The method for testing the system for testing the PCBA of the electronic cigarette according to claim 1, wherein said relay is a double-contact relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146874.8A CN107783029B (en) | 2017-11-17 | 2017-11-17 | Test system and test method for PCBA (printed circuit board assembly) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711146874.8A CN107783029B (en) | 2017-11-17 | 2017-11-17 | Test system and test method for PCBA (printed circuit board assembly) |
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| CN107783029A CN107783029A (en) | 2018-03-09 |
| CN107783029B true CN107783029B (en) | 2023-11-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342932A (en) * | 2018-12-06 | 2019-02-15 | 深圳市思拓微电子有限公司 | A kind of fixture that can detect electronic cigarette PCB control panel function automatically |
| CN113514752A (en) * | 2021-04-13 | 2021-10-19 | 深圳市太美亚电子科技有限公司 | Circuit board multi-performance parameter synchronous test system and device |
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|---|---|
| CN107783029A (en) | 2018-03-09 |
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