CN219715628U - Super capacitor test equipment - Google Patents
Super capacitor test equipment Download PDFInfo
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- CN219715628U CN219715628U CN202321015231.0U CN202321015231U CN219715628U CN 219715628 U CN219715628 U CN 219715628U CN 202321015231 U CN202321015231 U CN 202321015231U CN 219715628 U CN219715628 U CN 219715628U
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Abstract
The utility model discloses super capacitor test equipment, which comprises a main control module, a power supply circuit, a voltage measurement circuit and a current measurement circuit, wherein the voltage measurement circuit comprises a voltage input circuit, the input end of the voltage input circuit is connected with a test interface, the output end of the voltage input circuit is connected with the first input end of a first comparison circuit, the second input end of the first comparison circuit is connected with the first output end of a DA output circuit, the output end of the first comparison circuit is connected with the first input end of the main control module, the current measurement circuit comprises a current input circuit, the input end of the current input circuit is connected with the test interface, the output end of the current input circuit is connected with the first input end of a second comparison circuit, the second input end of the second comparison circuit is connected with the second output end of the DA output circuit, and the output end of the second comparison circuit is connected with the second input end of the main control module. The equipment has high detection precision.
Description
Technical Field
The utility model belongs to the technical field of power electronics, and particularly relates to super capacitor test equipment.
Background
The super capacitor has super power storage capacity, can provide a physical secondary power supply with strong pulse power, has the characteristics of high reliability, good ultralow temperature characteristic, environmental protection and no pollution, is a novel energy storage system, is an effective way for solving the problem of insufficient charging power of the existing super capacitor, and is widely applied to various industries such as new energy automobiles, electric power, elevators, coal mines, engineering machinery and the like.
The most important detection item in the super capacitor universal safety detection item is an electrical test, and the voltage and current parameters of the super capacitor are collected when the super capacitor is subjected to a charge-discharge cycle test.
At present, most circuits of the super capacitor detection equipment in the prior art are complex, the precision is not high, and related protection measures and the like are not provided.
Disclosure of Invention
The utility model aims to overcome at least one defect in the prior art and provides super capacitor test equipment.
The technical scheme of the utility model is realized as follows: the utility model discloses super capacitor test equipment, which comprises a main control module, a power supply circuit, a voltage measurement circuit and a current measurement circuit, wherein the power supply circuit is used for supplying power to the whole equipment, the voltage measurement circuit comprises a voltage input circuit and a first comparison circuit, the input end of the voltage input circuit is connected with a corresponding first test interface, the output end of the voltage input circuit is connected with the first input end of the first comparison circuit, the second input end of the first comparison circuit is connected with the first output end of a DA output circuit, the output end of the first comparison circuit is connected with the first input end of the main control module, the current measurement circuit comprises a current input circuit and a second comparison circuit, the input end of the current input circuit is connected with a corresponding second test interface, the output end of the current input circuit is connected with the first input end of the second comparison circuit, the second input end of the second comparison circuit is connected with the second input end of the DA output circuit, and the output end of the second comparison circuit is connected with the second input end of the main control module.
Further, the voltage input circuit includes an operational amplifier U25B and an instrumentation amplifier U26, the non-inverting input terminal of the operational amplifier U25B is grounded, the inverting input terminal of the operational amplifier U25B is connected to the corresponding first test interface, the inverting input terminal of the operational amplifier U25B is connected to one end of a resistor RF3 and one end of a capacitor CF3, the other end of the resistor RF3 and the other end of the capacitor CF3 are both connected to the output terminal of the operational amplifier U25B, the output terminal of the operational amplifier U25B is connected to the input terminal of the instrumentation amplifier U26, the OUT pin and the REF pin of the instrumentation amplifier U26 are both connected to one end of a resistor R219 and one end of a capacitor CV3, the other end of the capacitor CV3 is connected to the CAV pin of the instrumentation amplifier U26, the other end of the resistor R219 is connected to one end of a resistor R230 and one end of a capacitor CC16 and one end of a capacitor CC15, the other end of the resistor R230 is connected to the BFI pin of the capacitor CC16 and the other end of the capacitor CC15 is connected to the BFO pin of the instrumentation amplifier U26, and the BFO pin of the instrumentation amplifier U26 is connected to the first input terminal of the comparison circuit.
Further, the super capacitor test equipment of the utility model further comprises a TVS tube DT3, one end of the TVS tube DT3 is connected with the input end of the voltage input circuit, and the other end of the TVS tube DT3 is grounded.
Further, the first comparison circuit includes an operational amplifier U25A, the non-inverting input end of the operational amplifier U25A is connected with one end of a resistor R231 and one end of a resistor R232 respectively, the other end of the resistor R231 is connected with the output end of the voltage input circuit, the other end of the resistor R232 is grounded, the inverting input end of the operational amplifier U25A is connected with the first output end of the DA output circuit, one end of the resistor R233 and one end of the resistor R234, the other end of the resistor R233 is grounded, the other end of the resistor R234 is connected with the output end of the operational amplifier U25A, and the output end of the operational amplifier U25A is used for being connected with the first input end of the master control module.
Further, the current input circuit includes an operational amplifier U23B and an instrumentation amplifier U24, the non-inverting input terminal of the operational amplifier U23B is grounded, the inverting input terminal of the operational amplifier U23B is connected to one end of a resistor R200, the other end of the resistor R200 is connected to one end of a resistor RS2 and a corresponding second test interface, the other end of the resistor RS2 is grounded, the inverting input terminal of the operational amplifier U23B is connected to one end of a resistor RF2 and one end of a capacitor CF2, the other end of the resistor RF2 and the other end of the capacitor CF2 are both connected to the output terminal of the operational amplifier U23B, the OUT pin and the REF pin of the instrumentation amplifier U24 are both connected to one end of a resistor R211 and one end of a capacitor CV2, the other end of the capacitor CV2 is connected to the CAV pin of the instrumentation amplifier U24, the other end of the resistor R211 is connected to one end of a resistor R212, one end of a capacitor CC14 and one end of a capacitor CC13, the other end of the resistor R212 is connected to the BFI pin of the instrumentation amplifier U24, the other end of the capacitor CC14 is connected to the other end of the capacitor CC and the input terminal of the instrumentation amplifier U24 is connected to the first pin of the instrumentation amplifier U24.
Further, the super capacitor test equipment of the utility model further comprises a TVS tube DT2, one end of the TVS tube DT2 is connected with the input end of the current input circuit, and the other end of the TVS tube DT2 is grounded.
Further, the second comparison circuit includes an operational amplifier U23A, the non-inverting input end of the operational amplifier U23A is connected with one end of a resistor R213 and one end of a resistor R214 respectively, the other end of the resistor R213 is connected with the output end of the current input circuit, the other end of the resistor R214 is grounded, the inverting input end of the operational amplifier U23A is connected with the second output end of the DA output circuit, one end of a resistor R215 and one end of a resistor R216, the other end of the resistor R215 is grounded, the other end of the resistor R216 is connected with the output end of the operational amplifier U23A, and the output end of the operational amplifier U23A is used for being connected with the second input end of the main control module.
Furthermore, the super capacitor test equipment further comprises a communication circuit, and the main control module is used for being connected with the upper computer through the communication circuit.
Furthermore, the super capacitor test equipment further comprises a first detection protection circuit, wherein the input end of the first detection protection circuit is connected with the voltage input circuit, and the output end of the first detection protection circuit is connected with the third input end of the main control module.
Further, the super capacitor test equipment further comprises a second detection protection circuit for detecting whether the current exceeds the maximum current of the measuring range, wherein the input end of the second detection protection circuit is connected with the output end of the second comparison circuit, and the output end of the second detection protection circuit is connected with the fourth input end of the main control module.
The utility model has at least the following beneficial effects: the voltage measuring circuit of the super capacitor test equipment comprises a voltage input circuit and a first comparison circuit, wherein the input end of the voltage input circuit is connected with a corresponding first test interface, the output end of the voltage input circuit is connected with the first input end of the first comparison circuit, the second input end of the first comparison circuit is connected with the first output end of the DA output circuit, the output end of the first comparison circuit is connected with the first input end of the main control module, the current measuring circuit comprises a current input circuit and a second comparison circuit, the input end of the current input circuit is connected with a corresponding second test interface, the output end of the current input circuit is connected with the first input end of the second comparison circuit, the second input end of the second comparison circuit is connected with the second output end of the DA output circuit, the output end of the second comparison circuit is connected with the second input end of the main control module, and the input end of the output circuit is connected with the output end of the main control module.
When the circuit of the utility model is adopted, when the equipment starts to work, voltage (current) is input and then sequentially passes through the voltage input circuit (current input circuit) and the comparison circuit, the voltage input circuit (current input circuit) carries out impedance improvement and amplification sampling on signals so as to improve the precision of voltage and current acquisition, the comparison circuit mainly aims at comparing the acquired voltage or current value with a reference, and the voltage of the test port can be controlled by controlling the output voltage of the DAU so as to enable the voltage of the test port to reach the set value of the upper computer.
The voltage input circuit (current input circuit) has the function of increasing impedance, and improves the impedance and the measurement accuracy when measuring the voltage of the super capacitor.
The utility model also additionally adds a first detection protection circuit for detecting whether the super capacitor is connected reversely or/and a second detection protection circuit for detecting whether the current exceeds the set maximum current, and compared with the prior equipment, the function of the device is more perfect.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a supercapacitor test device according to an embodiment of the present utility model;
FIG. 2 is a circuit diagram of a voltage measurement circuit of a super capacitor test device according to an embodiment of the present utility model;
FIG. 3 is a circuit diagram of a current measurement circuit of a supercapacitor test device according to an embodiment of the present utility model;
fig. 4 is a circuit diagram of a master control module of the super capacitor test device according to an embodiment of the present utility model;
FIG. 5 is a partial circuit diagram of a DA output circuit of a supercapacitor test device according to an embodiment of the present utility model;
fig. 6 is a circuit diagram of a first detection protection circuit and a second detection protection circuit of the super capacitor test device according to the embodiment of the present utility model;
FIG. 7 is a circuit diagram of a power circuit of a supercapacitor test device according to an embodiment of the present utility model;
FIG. 8 is a circuit diagram of a communication circuit of a super capacitor test device according to an embodiment of the present utility model;
fig. 9 is a circuit diagram of a data transmission circuit of a super capacitor test device according to an embodiment of the present utility model;
fig. 10 is a circuit diagram of an LCD display circuit of the super capacitor test device according to the embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality", "a number" or "a plurality" is two or more.
Referring to fig. 1 to 10, an embodiment of the present utility model provides a super capacitor test device, including a main control module, a power supply circuit and at least one test channel, where each test channel includes a voltage measurement circuit and a current measurement circuit, the power supply circuit is configured to supply power to the whole device, the voltage measurement circuit includes a voltage input circuit and a first comparison circuit, an input end of the voltage input circuit is connected to a corresponding first test interface, an output end of the voltage input circuit is connected to a first input end of the first comparison circuit, a second input end of the first comparison circuit is connected to a first output end of the DA output circuit, an output end of the first comparison circuit is connected to a first input end of the main control module, the current measurement circuit includes a current input circuit and a second comparison circuit, an input end of the current input circuit is connected to a corresponding second test interface, an output end of the current input circuit is connected to a first input end of the second comparison circuit, a second input end of the second comparison circuit is connected to a second output end of the DA output circuit, and an output end of the second comparison circuit is connected to a second input end of the main control module.
The voltage input circuit and the current input circuit boost impedance of signals so as to boost the precision of collecting voltage and current, and amplify and sample the collected low voltage and low current. The comparison circuit is mainly used for comparing the acquired voltage or current value with a reference so as to achieve the set value of the upper computer.
Further, the voltage input circuit includes an operational amplifier U25B and an instrumentation amplifier U26, the in-phase input end of the operational amplifier U25B is grounded, the inverting input end of the operational amplifier U25B is connected to the 3 rd pin of the interface BLV1 (the 3 rd pin of the interface BLV1 is used for connecting the positive electrode of the super capacitor), the 4 th pin of the interface BLV1 (the 4 th pin of the interface BLV1 is used for connecting the negative electrode of the super capacitor) is grounded, the inverting input end of the operational amplifier U25B is respectively connected to one end of the resistor RF3 and one end of the capacitor CF3, the other end of the resistor RF3 and the other end of the capacitor CF3 are respectively connected to the output end of the operational amplifier U25B, the output end of the operational amplifier U25B is connected to the input end of the instrumentation amplifier U26, the OUT pin and the REF pin of the instrumentation amplifier U26 are respectively connected to one end of the resistor R219 and one end of the capacitor CV3, the other end of the capacitor CV3 is connected to the CAV pin of the instrument amplifier U26, the other end of the resistor R219 is respectively connected to one end of the resistor R230, one end of the capacitor CC16 and one end of the capacitor CC15, the other end of the resistor CC 230 is respectively connected to the other end of the capacitor CC 26 is connected to the other end of the capacitor CC 26 and the other end of the output end of the instrument amplifier U26 is connected to the output end of the input end of the output of the instrument amplifier U26.
Further, the super capacitor test equipment of the utility model further comprises a TVS tube DT3, one end of the TVS tube DT3 is connected with the input end of the voltage input circuit, and the other end of the TVS tube DT3 is grounded.
For example, one end of the TVS tube DT3 is connected to the inverting input terminal of the op-amp U25B.
The CS pin of the instrumentation amplifier U26 is connected with the first voltage through a resistor R218, the VDD pin of the instrumentation amplifier U26 is connected with the first voltage, the VSS pin of the instrumentation amplifier U26 is connected with the second voltage, and the COM pin and the GND pin of the instrumentation amplifier U26 are grounded.
Further, the first comparison circuit includes an operational amplifier U25A, the non-inverting input end of the operational amplifier U25A is connected with one end of a resistor R231 and one end of a resistor R232 respectively, the other end of the resistor R231 is connected with the output end of the voltage input circuit, the other end of the resistor R232 is grounded, the inverting input end of the operational amplifier U25A is connected with the first output end of the DA output circuit, one end of the resistor R233 and one end of the resistor R234, the other end of the resistor R233 is grounded, the other end of the resistor R234 is connected with the output end of the operational amplifier U25A, and the output end of the operational amplifier U25A is used for being connected with the first input end of the master control module.
The output end of the operational amplifier U25A is connected with one end of a resistor R235, the other end of the resistor R235 is respectively connected with the first input end of the main control module, the anode of a capacitor CD23 and the cathode of a diode DZ3, the cathode of the capacitor CD23 is grounded, and the anode of the diode DZ3 is grounded.
Further, the current input circuit includes an operational amplifier U23B and an instrumentation amplifier U24, the in-phase input end of the operational amplifier U23B is grounded, the inverting input end of the operational amplifier U23B is connected to one end of a resistor R200, the other end of the resistor R200 is connected to one end of a resistor RS2 and the 3 rd pin of an interface BL1 (the 3 rd pin of the interface BL1 is used for connecting to the positive electrode of a super capacitor), the 4 th pin of the interface BL1 (the 4 th pin of the interface BL1 is used for connecting to the negative electrode of the super capacitor) is grounded, the other end of the resistor RS2 is grounded, the inverting input end of the operational amplifier U23B is connected to one end of a resistor RF2 and one end of a capacitor CF2, the other end of the resistor RF2 and the other end of the capacitor CF2 are connected to the output end of the operational amplifier U23B, the OUT pin of the instrumentation amplifier U24 and the OUT pin of the instrumentation amplifier U24 are connected to one end of the resistor R211 and one end of the capacitor CV2, the other end of the CAV pin of the capacitor CV2 is connected to the other end of the resistor CC 212 and the other end of the capacitor CC14 is connected to the other end of the resistor CC14, the other end of the bfr 14 is connected to the other end of the capacitor CC14 is connected to the other end of the resistor CC14, and the other end of the bf14 is connected to the other end of the capacitor is connected to the capacitor is 13.
The CS pin of the instrumentation amplifier U24 is connected with the first voltage through a resistor R210, the VDD pin of the instrumentation amplifier U24 is connected with the first voltage, the VSS pin of the instrumentation amplifier U24 is connected with the second voltage, and the COM pin and the GND pin of the instrumentation amplifier U24 are grounded.
Further, the super capacitor test equipment of the utility model further comprises a TVS tube DT2, one end of the TVS tube DT2 is connected with the input end of the current input circuit, and the other end of the TVS tube DT2 is grounded.
One end of the TVS tube DT2 is connected with the input end of the current input circuit for connecting with the test interface. One end of the TVS tube DT2 is connected to the inverting input terminal of the op-amp U23B via a resistor R200.
Further, the second comparison circuit includes an operational amplifier U23A, the non-inverting input end of the operational amplifier U23A is connected with one end of a resistor R213 and one end of a resistor R214 respectively, the other end of the resistor R213 is connected with the output end of the current input circuit, the other end of the resistor R214 is grounded, the inverting input end of the operational amplifier U23A is connected with the second output end of the DA output circuit, one end of a resistor R215 and one end of a resistor R216, the other end of the resistor R215 is grounded, the other end of the resistor R216 is connected with the output end of the operational amplifier U23A, and the output end of the operational amplifier U23A is used for being connected with the second input end of the main control module.
The output end of the operational amplifier U23A is connected with one end of a resistor R217, the other end of the resistor R217 is respectively connected with the second input end of the main control module, the anode of a capacitor CD22 and the cathode of a diode DZ2, the cathode of the capacitor CD22 is grounded, and the anode of the diode DZ2 is grounded.
The first voltage in this embodiment is +12V and the second voltage is-12V.
Furthermore, the super capacitor test equipment further comprises a communication circuit, and the main control module is used for being connected with the upper computer through the communication circuit.
Further, each test channel further comprises a first detection protection circuit, the input end of the first detection protection circuit is connected with the voltage input circuit, and the output end of the first detection protection circuit is connected with the third input end of the main control module.
The input end of the first detection protection circuit is connected with the output end of the voltage input circuit, and the output end of the first detection protection circuit is connected with the third input end of the main control circuit.
The first detection protection circuit comprises a bridge rectifier circuit, a first input end of the bridge rectifier circuit is connected with an output end HV of the voltage input circuit through a capacitor CP01, a second input end of the bridge rectifier circuit is grounded, the first output end of the bridge rectifier circuit is respectively connected with one end of a capacitor CP02 and one end of a resistor RP01, the other end of the resistor RP01 is respectively connected with a cathode of a diode DP5 and a first input end of an optocoupler, an anode of the diode DP5, the other end of the capacitor CP02 and the second output end of the bridge rectifier circuit are respectively connected with a second input end of the optocoupler, and the first input end of the optocoupler is respectively connected with a third input end of a master control circuit and one end of a resistor R404, and the other end of the resistor R404 is connected with a first voltage (such as 3.3V).
Further, each test channel further comprises a second detection protection circuit for detecting whether the current exceeds the maximum current of the measuring range, the input end of the second detection protection circuit is connected with the output end of the second comparison circuit, and the output end of the second detection protection circuit is connected with the fourth input end of the main control module.
Further, each test channel of the utility model further comprises a second detection protection circuit for detecting whether the current exceeds the maximum current of the measuring range, wherein the input end of the second detection protection circuit is connected with the output end of the second comparison circuit, and the output end of the second detection protection circuit is connected with the fourth input end of the main control circuit.
The main control circuit is connected with the alarm circuit, and when the second detection protection circuit detects that the current exceeds the maximum current of the measuring range, the alarm circuit is controlled to alarm.
The second detection protection circuit includes an operational amplifier U108A, an anode input end of the operational amplifier U108A is connected with an output end of the second comparison circuit, a cathode input end of the operational amplifier U108A is respectively connected with one end of a resistor R406 and a fixed end of a sliding resistor (or potentiometer) RW1, the other end of the resistor R406 is connected with a second voltage (e.g., +12v), the other fixed end of the sliding resistor RW1 and the sliding ground, an output end of the operational amplifier U108A is respectively connected with one end of a resistor R4054 and a fourth input end of the main control circuit, and the other end of the resistor R4054 is grounded.
Further, the main control module adopts an MCU module or a singlechip and the like.
Further, the super capacitor test equipment further comprises a display circuit, and the display circuit is electrically connected with the main control module. The display circuit may employ an LCD display circuit.
Further, the super capacitor test equipment further comprises an instruction input module, and the instruction input module is electrically connected with the main control module.
Furthermore, the super capacitor test equipment further comprises a data transmission circuit, and the data transmission circuit is electrically connected with the main control module.
The working principle of the utility model is as follows: when the equipment starts to work, the voltage (current) is input and then sequentially passes through a voltage input circuit (current input circuit) and a comparison circuit, the voltage input circuit (current input circuit) carries out impedance improvement and amplification sampling on signals so as to improve the precision of voltage and current collection, the comparison circuit mainly plays a role in comparing the collected voltage or current value with a reference, and the voltage of a test port can be controlled by controlling the output voltage of the DAU so that the voltage of the test port reaches the set value of an upper computer.
The device has the characteristics of small measurement workload, rapidness, convenience, stable performance, accurate measurement, high precision, high fault detection rate and the like.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a super capacitor test equipment which characterized in that: the intelligent power supply comprises a main control module, a power supply circuit, a voltage measurement circuit and a current measurement circuit, wherein the power supply circuit is used for supplying power to the whole equipment, the voltage measurement circuit comprises a voltage input circuit and a first comparison circuit, the input end of the voltage input circuit is connected with a corresponding first test interface, the output end of the voltage input circuit is connected with the first input end of the first comparison circuit, the second input end of the first comparison circuit is connected with the first output end of the DA output circuit, the output end of the first comparison circuit is connected with the first input end of the main control module, the current measurement circuit comprises a current input circuit and a second comparison circuit, the input end of the current input circuit is connected with a corresponding second test interface, the output end of the current input circuit is connected with the first input end of the second comparison circuit, the second input end of the second comparison circuit is connected with the second output end of the DA output circuit, the output end of the second comparison circuit is connected with the second input end of the main control module, and the input end of the DA output circuit is connected with the output end of the main control module.
2. The supercapacitor test device according to claim 1, wherein: the voltage input circuit comprises an operational amplifier U25B and an instrument amplifier U26, the non-inverting input end of the operational amplifier U25B is grounded, the inverting input end of the operational amplifier U25B is connected with a corresponding first test interface, the inverting input end of the operational amplifier U25B is respectively connected with one end of a resistor RF3 and one end of a capacitor CF3, the other end of the resistor RF3 and the other end of the capacitor CF3 are respectively connected with the output end of the operational amplifier U25B, the output end of the operational amplifier U25B is connected with the input end of the instrument amplifier U26, the OUT pin and the REF pin of the instrument amplifier U26 are respectively connected with one end of a resistor R219 and one end of a capacitor CV3, the other end of the capacitor CV3 is connected with the CAV pin of the instrument amplifier U26, the other end of the resistor R219 is respectively connected with one end of a resistor R230, the capacitor CC16 and one end of a capacitor CC15, the other end of the resistor R230 is connected with the BFO pin of the instrument amplifier U26, and the BFO pin of the instrument amplifier U26 is used for being connected with a first input circuit.
3. The supercapacitor test device according to claim 1 or 2, wherein: the voltage input circuit further comprises a TVS tube DT3, one end of the TVS tube DT3 is connected with the input end of the voltage input circuit, and the other end of the TVS tube DT3 is grounded.
4. The supercapacitor test device according to claim 1, wherein: the first comparison circuit comprises an operational amplifier U25A, the non-inverting input end of the operational amplifier U25A is respectively connected with one end of a resistor R231 and one end of a resistor R232, the other end of the resistor R231 is connected with the output end of the voltage input circuit, the other end of the resistor R232 is grounded, the inverting input end of the operational amplifier U25A is connected with the first output end of the DA output circuit, one end of a resistor R233 and one end of a resistor R234, the other end of the resistor R233 is grounded, the other end of the resistor R234 is connected with the output end of the operational amplifier U25A, and the output end of the operational amplifier U25A is used for being connected with the first input end of the main control module.
5. The supercapacitor test device according to claim 1, wherein: the current input circuit comprises an operational amplifier U23B and an instrument amplifier U24, the non-inverting input end of the operational amplifier U23B is grounded, the inverting input end of the operational amplifier U23B is connected with one end of a resistor R200, the other end of the resistor R200 is respectively connected with one end of a resistor RS2 and a corresponding second test interface, the other end of the resistor RS2 is grounded, the inverting input end of the operational amplifier U23B is respectively connected with one end of a resistor RF2 and one end of a capacitor CF2, the other end of the resistor RF2 and the other end of the capacitor CF2 are respectively connected with the output end of the operational amplifier U23B, the output end of the operational amplifier U23B is connected with the input end of the instrument amplifier U24, the OUT pin and the REF pin of the instrument amplifier U24 are respectively connected with one end of a resistor R211 and one end of a capacitor CV2, the other end of the capacitor CV2 is connected with the CAV pin of the instrument amplifier U24, the other end of the resistor R211 is respectively connected with one end of a resistor R212, one end of a capacitor CC14 and one end of a capacitor CC13, the other end of the resistor R212 is connected with the BFI pin of the instrument amplifier U24, the other end of the capacitor CC14 is grounded, and the other end of the capacitor CC is connected with the other end of the capacitor CC14 and the other end of the capacitor CC is connected with the BFO pin of the instrument amplifier U24.
6. The supercapacitor test device according to claim 1 or 5, wherein: the circuit further comprises a TVS tube DT2, one end of the TVS tube DT2 is connected with the input end of the current input circuit, and the other end of the TVS tube DT2 is grounded.
7. The supercapacitor test device according to claim 1, wherein: the second comparison circuit comprises an operational amplifier U23A, the non-inverting input end of the operational amplifier U23A is respectively connected with one end of a resistor R213 and one end of a resistor R214, the other end of the resistor R213 is connected with the output end of the current input circuit, the other end of the resistor R214 is grounded, the inverting input end of the operational amplifier U23A is connected with the second output end of the DA output circuit, one end of a resistor R215 and one end of a resistor R216, the other end of the resistor R215 is grounded, the other end of the resistor R216 is connected with the output end of the operational amplifier U23A, and the output end of the operational amplifier U23A is used for being connected with the second input end of the main control module.
8. The supercapacitor test device according to claim 1, wherein: the main control module is used for being connected with the upper computer through the communication circuit.
9. The supercapacitor test device according to claim 1, wherein: the device further comprises a first detection protection circuit, wherein the input end of the first detection protection circuit is connected with the voltage input circuit, and the output end of the first detection protection circuit is connected with the third input end of the main control module.
10. The supercapacitor test device according to claim 1, wherein: the device further comprises a second detection protection circuit for detecting whether the current exceeds the maximum current of the measuring range, wherein the input end of the second detection protection circuit is connected with the output end of the second comparison circuit, and the output end of the second detection protection circuit is connected with the fourth input end of the main control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321015231.0U CN219715628U (en) | 2023-04-28 | 2023-04-28 | Super capacitor test equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321015231.0U CN219715628U (en) | 2023-04-28 | 2023-04-28 | Super capacitor test equipment |
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| CN219715628U true CN219715628U (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321015231.0U Active CN219715628U (en) | 2023-04-28 | 2023-04-28 | Super capacitor test equipment |
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| CN (1) | CN219715628U (en) |
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