CN209132345U - A capacitor reliability test circuit - Google Patents

Abstract

A kind of capacitor reliability test circuit, it includes power module, one or more test modules, each test module includes first resistor, second resistance, fuse, first bright light module and the second bright light module, one end of fuse is electrically connected with one end of a testing capacitance, the other end of testing capacitance is electrically connected with the anode of power module, the other end of fuse is electrically connected with the cathode of power module, fuse is electrically connected with the junction of testing capacitance with one end of first resistor, the other end of first resistor is electrically connected with the anode of the first bright light module, the cathode of first bright light module is electrically connected with the cathode of power module, one end of second resistance is electrically connected with the anode of power module, the other end of second resistance is electrically connected with the anode of the second bright light module, the cathode of second bright light module is electrically connected with the cathode of power module.The capacitor reliability test circuit is low in cost, efficiency is higher without verifying in finished product complete machine.

Description

A capacitor reliability test circuit

technical field

The utility model relates to the technical field of reliability testing of electronic components, in particular to a capacitor reliability testing circuit.

Background technique

Any electronic product, in order to avoid reliability problems, must do a series of reliability tests before going on the market. As an electronic material capacitor, it is no exception. As a single component material, the capacitor must be tested for reliability problems when it is powered on. The traditional method is to mount the capacitor to be tested on the terminal product through SMT (Surface Mount Technology) surface mount technology to verify the reliability problem. In order to test a small electronic material, it is necessary to feed the finished product for verification. , not only is the cost too high, but also very inefficient.

Utility model content

The technical problem to be solved by the utility model is to provide a capacitor reliability test circuit which does not need to be verified on the finished product, thereby making the cost low and the efficiency high.

The technical solution of the utility model is: a capacitance reliability test circuit, which is characterized in that: it includes a power module and one or more test modules electrically connected to the power module, and each test module includes a first A resistor, a second resistor, a fuse, a first lighting module and a second lighting module, one end of the fuse is electrically connected to one end of a capacitor to be tested, and the other end of the capacitor to be tested is electrically connected to the positive electrode of the power module The other end of the fuse is electrically connected to the negative pole of the power supply module, the connection between the fuse and the capacitor to be measured is electrically connected to one end of the first resistor, and the other end of the first resistor is electrically connected to the first light module. The anode is electrically connected, the cathode of the first lighting module is electrically connected to the negative electrode of the power module, one end of the second resistor is electrically connected to the anode of the power module, and the other end of the second resistor is electrically connected to the second lighting module The anode of the second lighting module is electrically connected with the cathode of the power module.

The working principle of the capacitor reliability test circuit of the utility model is as follows:

Under normal circumstances, the current passes through the second resistor to light the second lighting module to form a voltage to age the capacitor under test; when the capacitor under test is short-circuited during the reliability aging test, the current will pass through the fuse to form a loop, the first Both the lighting module and the second lighting module will be extinguished; then the fuse will continue to conduct, and based on the characteristics of the fuse, the branch where the fuse is located will be blown, so that the current will pass through the first resistor to light the first lighting module; Therefore, as long as the first light-on module of a certain test module is lit, it can be clearly identified that the corresponding capacitor to be tested has failed during the reliability aging test.

After adopting the above-mentioned structure, the utility model has the following advantages:

The capacitor reliability test circuit of the utility model utilizes the principle that the capacitor to be tested will be turned on after failure, so that the capacitor to be tested can be tested only by using a few low-cost components, even if the number of test modules is increased to test a plurality of capacitors to be tested at one time Capacitance measurement will not make the test circuit too complicated, and the test circuit can be reused without the need to verify on the finished product. especially obvious.

Preferably, the colors of the lights of the first lighting module and the second lighting module are different. Different light settings can quickly and significantly distinguish whether the capacitor under test is normal or failed.

Preferably, the first lighting module and the second lighting module each include a plurality of LED lights connected in series. This setting can make the lighting effect of the lighting module better and more eye-catching.

Preferably, the number and/or arrangement shape of the LED lights of the first lighting module is different from that of the second lighting module. This setting can more quickly and significantly distinguish whether the capacitor under test is a normal condition or a failed condition.

Preferably, there are 2-10 test modules. A reasonable number of test modules will not increase the cost too much while improving the test efficiency.

Description of drawings:

Fig. 1 is the circuit diagram of the capacitor reliability test circuit of the utility model;

In the figure: 1-power module, 2-test module, 3-first resistor, 4-second resistor, 5-first lighting module, 6-second lighting module, 7-fuse, 8-capacitor to be tested , 9-LED lights.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

Example:

A capacitance reliability test circuit, which includes a power supply module 1 and one or more test modules 2 electrically connected to the power supply module 1, wherein each test module 2 includes a first resistor 3, a second resistor 4, The fuse 7, the first lighting module 5 and the second lighting module 6, one end of the fuse 7 is electrically connected to one end of a capacitor 8 to be tested, and the other end of the capacitor 8 to be tested is electrically connected to the positive electrode of the power supply module 1. Connection, the capacitor 8 to be tested can be electrically connected to the power module 1 and the fuse 7 through the crimping device and the solder joints on the circuit board. , which will not be repeated here, the other end of the fuse 7 is electrically connected to the negative pole of the power supply module 1, the connection between the fuse 7 and the capacitor 8 to be measured is electrically connected to one end of the first resistor 3, and the first resistor 3 The other end of the resistor 4 is electrically connected to the anode of the first lighting module 5 , the cathode of the first lighting module 5 is electrically connected to the negative electrode of the power supply module 1 , and one end of the second resistor 4 is electrically connected to the positive electrode of the power supply module 1 . , the other end of the second resistor 4 is electrically connected to the anode of the second lighting module 6, and the cathode of the second lighting module 6 is electrically connected to the negative electrode of the power supply module 1; the first lighting module 5 and the The light colors of the second lighting modules 6 are different; the first lighting modules 5 and the second lighting modules 6 both include a number of LED lights 9 connected in series, and a number refers to two or more; The number and/or the arrangement shape of the LED lamps 9 of the lighting module 5 is different from that of the second lighting module 6; the test modules 2 are provided with 2-10 LEDs.

The capacitor reliability test circuit of the utility model utilizes the principle that the capacitor 8 to be tested will be turned on after failure, so that the capacitor 8 to be tested can be tested only by using a few low-cost components, even if the number of test modules 2 is increased for one-time testing Multiple capacitors to be tested 8 will not make the test circuit too complicated, and the test circuit can be reused without the need for verification on the finished product. Not only is the cost low, but also the efficiency is high. It is especially obvious when the capacitor 8 is detected.

The working principle of the capacitor reliability test circuit of the utility model is as follows:

Under normal circumstances, the current passes through the second resistor 4 to light up the second lighting module 6 to form a voltage to age the capacitor 8 under test; when the capacitor under test 8 is short-circuited during the reliability aging test, the current will pass through the fuse 7 A loop is formed, and the first lighting module 5 and the second lighting module 6 will be extinguished; then the fuse 7 will continue to conduct, and based on the characteristics of the fuse 7, the branch where the fuse 7 is located will be blown, so that the current will pass through the first The resistor 3 lights up the first lighting module 5; therefore, as long as the first lighting module 5 of a certain test module 2 is turned on, it can be clearly identified that the corresponding capacitor 8 to be tested has failed during the reliability aging test.

Claims (5)

1. a kind of capacitor reliability test circuit, it is characterised in that: it include power module (1) and with power module (1) electricity Connection one or more test modules (2), each test module (2) include first resistor (3), second resistance (4), Fuse (7), the first bright light module (5) and the second bright light module (6), one end and a testing capacitance (8) of the fuse (7) One end electrical connection, the other end of the testing capacitance (8) is electrically connected with the positive of power module (1), the fuse (7) The other end is electrically connected with the cathode of power module (1), the junction and first resistor of the fuse (7) and testing capacitance (8) (3) one end electrical connection, the other end of the first resistor (3) are electrically connected with the anode of the first bright light module (5), and described first The cathode of bright light module (5) is electrically connected with the cathode of power module (1), one end and power module (1) of the second resistance (4) Anode electrical connection, the other end of the second resistance (4) is electrically connected with the anode of the second bright light module (6), and described second is bright The cathode of lamp module (6) is electrically connected with the cathode of power module (1).

2. a kind of capacitor reliability test circuit according to claim 1, it is characterised in that: the first bright light module (5) different with the light color of the second bright light module (6).

3. a kind of capacitor reliability test circuit according to claim 1, it is characterised in that: the first bright light module (5) and the second bright light module (6) includes several concatenated LED light (9).

4. a kind of capacitor reliability test circuit according to claim 3, it is characterised in that: the first bright light module (5) quantity and/or arrangement shape of LED light (9) are different from second bright light module (6).

5. a kind of capacitor reliability test circuit according to claim 1, it is characterised in that: the test module (2) sets Set 2-10.