CN213181944U - Voltage test line falling response module for battery tester - Google Patents
Voltage test line falling response module for battery tester Download PDFInfo
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- CN213181944U CN213181944U CN202021302759.2U CN202021302759U CN213181944U CN 213181944 U CN213181944 U CN 213181944U CN 202021302759 U CN202021302759 U CN 202021302759U CN 213181944 U CN213181944 U CN 213181944U
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Abstract
The utility model discloses the technique belongs to the electrical control device field, a voltage test line response module that drops for battery tester is disclosed, whether resistance and optical coupler that bypass goes out will fall the line and turn into the height in test equipment internal circuit board through battery positive voltage line, the data form of this kind of switching value of low level, the retransmission gives microprocessor, microprocessor gives executive component according to the information output signal who receives, in order to keep or cut off the return circuit between detector and battery, prevent the emergence of overcharge or overdischarge accident, personnel and equipment safety have been ensured, be applicable to the process that detects or charge-discharge the battery.
Description
Technical Field
The utility model discloses the technique belongs to the electrical control device field, specifically discloses a voltage test line response module that drops for battery tester.
Background
Referring to fig. 1, in the battery test of the prior art, a four-wire system, i.e., two current wires and two voltage wires are separated from each other, is basically used to connect to a battery to be tested to obtain higher test accuracy. When the positive and negative electrodes of the voltage line are connected to the positive and negative electrodes of the battery, the collected battery voltage is equal to the actual voltage. When the battery and the detection equipment are connected perfectly in a four-wire system and the battery is not charged or discharged, the battery voltage detected on the current wire and the voltage wire is equal. When the voltage line of battery drops, the battery is in charge or discharge state again, can cause the battery voltage of gathering and battery actual voltage to have the deviation, if the deviation is too big, can cause the battery to appear overcharging or overdischarge, harm the battery, can catch fire and explode when serious.
SUMMERY OF THE UTILITY MODEL
Because the current line and the voltage line are separated by adopting a four-wire system, the problem of inaccurate voltage detection caused by voltage difference generated when large current passes through the current line is avoided, the number of connecting points at two ends of the battery is doubled, the falling of the current line does not cause any influence on the battery, and if the voltage line falls off in the normal charging and discharging test process of the battery, the overcharge and overdischarge of the battery are necessarily caused.
In order to solve the risk that the battery that the voltage line drops and causes overcharges or overdischarge, the utility model provides a voltage test line response module that drops for battery tester, specific technical scheme is as follows:
referring to fig. 2, a voltage test line drop response module for a battery tester includes a microprocessor, an optical coupler U2, a current limiting resistor R1 and a pull-up resistor R3, where the optical coupler U2 includes a light emitting diode and a photosensitive switch, a light receiving portion of the photosensitive switch is close to the light emitting diode and can respond to a light signal emitted by the light emitting diode to form a coupling relationship, and the current limiting resistor R1 and the light emitting diode are connected in series and then connected between a positive terminal and a negative terminal of a power supply through a voltage detection line of a battery to be tested to form a battery terminal voltage loop; the low-level end of the photosensitive switch is grounded, the high-level end of the photosensitive switch is divided into two paths, one path of the photosensitive switch is connected with a pull-up resistor R3 in series and then is connected to the fixed potential in the battery tester system, and the other path of the photosensitive switch is connected to the INT end of the microprocessor.
Thus, when the voltage line is normal, the light emitting diode in the terminal voltage loop is conducted in the forward direction to emit light, the photosensitive switch coupled with the light emitting diode is switched on, and the INT end of the microprocessor is grounded through the photosensitive switch and receives a low-level signal; when the voltage line drops, the terminal voltage loop is disconnected, the light-emitting diode is extinguished, the photosensitive switch coupled with the light-emitting diode is also disconnected, and the INT end of the microprocessor is connected to a fixed potential through the pull-up resistor R3 to receive a high-level signal. The microprocessor can judge whether the voltage line falls off according to the received high/low level signal, respond, send information to the corresponding execution element and perform correct treatment.
Preferably, the response module further comprises an optical coupler U1 and a current-limiting resistor R2, the optical coupler U1 comprises a light emitting diode and a photosensitive switch coupled with the light emitting diode, the current-limiting resistor R2 and the light emitting diode are connected in series and then connected between a GPIO terminal of the microprocessor and a ground wire through a lead wire to form an anti-creeping control loop, and the photosensitive switch which is connected in series and coupled with the light emitting diode in the anti-creeping control loop is added in the battery terminal voltage loop.
Therefore, when the test is carried out, the test equipment is electrified, the anti-leakage control loop is firstly connected, the optical coupler acts to connect the battery terminal voltage loop, and when the test is not carried out, the anti-leakage control loop is not connected, the light-emitting diode in the anti-leakage control loop is extinguished, so that the photosensitive switch in the battery terminal voltage loop is disconnected, and the occurrence of electric leakage is prevented.
Preferably, the photosensitive switch is a phototriode.
Preferably, the photosensitive switch is a photodiode or a photoresistor.
Compared with the prior art, the utility model discloses possess following beneficial effect:
by using the response module disclosed by the utility model, when the operator detects the battery, if the voltage line falls off, the microprocessor can quickly detect the battery and quickly take action, so as to avoid the occurrence of overcharge or overdischarge accidents; when the battery detection equipment is closed, the connection between the positive electrode and the negative electrode of the battery is automatically cut off, so that the battery is prevented from leaking electricity.
Drawings
Fig. 1 is a schematic diagram of a conventional four-wire battery testing device connected to a battery.
Fig. 2 is a schematic diagram of the response module connection disclosed by the invention added on the basis of fig. 1.
In the figure: RI and R2 are both current-limiting resistors; r3 is a pull-up resistor; u1 and U2 are both optical couplers; the MCU is a microprocessor;
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on this embodiment without any creative effort belong to the protection scope of the present invention.
Two current lines and voltage lines are led out from two poles of the battery respectively and are connected to a current ring port and a voltage ring port of the battery test equipment, a current-limiting resistor R1, an optical coupler U1 and an optical coupler U2 are bypassed on a circuit board inside the test equipment by the positive voltage line of the battery and are connected to a negative voltage line of the battery again, and a closed loop is formed by the negative voltage line of the battery and the battery. The anode control end of the light emitting diode of the optical coupler U1 is connected with a current limiting resistor R2 in series and is connected to a pin of a MCU controller GPIO1, and the collector of the phototriode of the optical coupler U2 is connected to an INT1 pin of the MCU controller after being pulled up through the level of a pull-up resistor R3.
The optocoupler U1 is turned off when the battery test device is not energized so that the closed loop on the voltage line has no discharge current, and the battery leakage current is minimal because the phototransistor is very resistive in the off state. When the battery test equipment is normally powered on when a battery is connected, the controller MCU firstly gives a GPIO high level to enable the phototriode in the optocoupler U1 to be conducted, and the battery is connected outside the test equipment, so that the voltage of a PN junction of a light emitting diode in the optocoupler U2 is larger than 0.7V and the phototriode in the optocoupler U2 is normally conducted to enable the phototriode in the optocoupler U2 to be conducted, and the INT1 pin of the controller MCU is at a low level. If the voltage wire drops suddenly at the moment to cause the disconnection of a closed loop circuit of the voltage wire, a light emitting diode in the optical coupler U2 is extinguished, and a phototriode in the optical coupler U2 is enabled to be rapidly turned off, so that the INT1 pin of the microcontroller MCU is high level to trigger the internal interruption of the system to enable a current loop to stop the charging and discharging actions of the battery, and the battery is effectively prevented from being overcharged and overdischarged, and an effective protection effect is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a voltage test line response module that drops for battery tester which characterized in that: the device comprises a microprocessor, an optical coupler U2, a current limiting resistor R1 and a pull-up resistor R3, wherein the optical coupler U2 comprises a light-emitting diode and a photosensitive switch, a light receiving part of the photosensitive switch is close to the light-emitting diode and can respond to an optical signal emitted by the light-emitting diode to form a coupling relation, and the current limiting resistor R1 and the light-emitting diode are connected in series and then are connected between a positive terminal and a negative terminal of a power supply through a voltage detection line of a battery to be detected to form a battery terminal voltage loop; the low-level end of the photosensitive switch is grounded, the high-level end of the photosensitive switch is divided into two paths, one path of the photosensitive switch is connected with a pull-up resistor R3 in series and then is connected to the fixed potential in the battery tester system, and the other path of the photosensitive switch is connected to the INT end of the microprocessor.
2. The voltage test line drop response module of claim 1, wherein: the LED light source further comprises an optical coupler U1 and a current-limiting resistor R2, wherein the optical coupler U1 comprises a light-emitting diode and a photosensitive switch coupled with the light-emitting diode, the current-limiting resistor R2 is connected in series with the light-emitting diode and then connected between a GPIO (general purpose input/output) end of the microprocessor and the ground wire through a lead to form an anti-creeping control loop, and the photosensitive switch coupled with the light-emitting diode in the anti-creeping control loop is additionally connected in series in the battery end voltage loop.
3. A voltage test line drop response module for a battery tester as claimed in either of claims 1 or 2, wherein: the photosensitive switch is a phototriode.
4. A voltage test line drop response module for a battery tester as claimed in either of claims 1 or 2, wherein: the photosensitive switch is a photosensitive diode or a photosensitive resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021302759.2U CN213181944U (en) | 2020-07-06 | 2020-07-06 | Voltage test line falling response module for battery tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021302759.2U CN213181944U (en) | 2020-07-06 | 2020-07-06 | Voltage test line falling response module for battery tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213181944U true CN213181944U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021302759.2U Active CN213181944U (en) | 2020-07-06 | 2020-07-06 | Voltage test line falling response module for battery tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213181944U (en) |
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2020
- 2020-07-06 CN CN202021302759.2U patent/CN213181944U/en active Active
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