CN220340366U - Battery internal resistance measurement system for universal meter - Google Patents
Battery internal resistance measurement system for universal meter Download PDFInfo
- Publication number
- CN220340366U CN220340366U CN202321565432.8U CN202321565432U CN220340366U CN 220340366 U CN220340366 U CN 220340366U CN 202321565432 U CN202321565432 U CN 202321565432U CN 220340366 U CN220340366 U CN 220340366U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- resistor
- chip
- capacitor
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 28
- 230000006641 stabilisation Effects 0.000 claims abstract description 12
- 238000011105 stabilization Methods 0.000 claims abstract description 12
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 123
- 230000000087 stabilizing effect Effects 0.000 claims description 49
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 34
- 229910052744 lithium Inorganic materials 0.000 claims description 34
- 239000003381 stabilizer Substances 0.000 claims description 23
- 101000941170 Homo sapiens U6 snRNA phosphodiesterase 1 Proteins 0.000 claims description 22
- 102100031314 U6 snRNA phosphodiesterase 1 Human genes 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application discloses a battery internal resistance measurement system for a universal meter, which relates to the field of electronic testing, and comprises a power supply unit, a power supply unit and a control unit, wherein the power supply unit is configured to be in signal connection with an external voltage source and is used for carrying out voltage reduction and voltage stabilization treatment on the voltage of the external power source and outputting a power supply signal; the constant current unit is configured to be in signal connection with the output end of the power supply unit and is used for receiving a power supply signal to perform voltage stabilization rectification and outputting a constant current signal; the frequency generation unit is configured to be in signal connection with the output end of the constant current unit and is used for receiving the constant current signal to carry out frequency fixation and outputting a frequency fixation signal; the data operational amplifier unit is configured to be in signal connection with the output end of the frequency generation unit and is used for carrying out operational amplification on the received fixed frequency signal and outputting an operational amplifier signal; and the measuring unit is configured to be in signal connection with the output end of the data operational amplifier unit and is used for receiving the operational amplifier signal and measuring the internal resistance of the battery to be measured. The application has the effect that the internal resistance of the battery can be measured and the battery can be conveniently carried when the common universal meter is used.
Description
Technical Field
The application relates to the field of electronic testing, in particular to a battery internal resistance measurement system for a universal meter.
Background
The universal meter is a magneto-electric instrument with rectifier and capable of measuring various electric parameters of AC, DC, voltage and resistance, etc. for every electric quantity, it has several measuring ranges, also called multipurpose ammeter or multipurpose ammeter for short, and is formed from magneto-electric ammeter (meter head), measuring circuit and selecting switch, etc. by means of the conversion of selecting switch, it can conveniently measure various electric parameters, and its circuit calculation is mainly based on closed circuit ohm law, and its variety is many, and when it is used, it should be selected according to different requirements.
At present, lithium batteries in the market are widely applied, universal meters commonly used in electronic design, production and maintenance have no function of measuring the internal resistance of the batteries, separate meters are required to be purchased additionally for measuring the internal resistance of the batteries, the purchase cost is increased, the carrying is inconvenient, and improvement exists.
Disclosure of Invention
In order to solve the problem that a commonly used universal meter does not have a function of measuring the internal resistance of a battery, and a separate instrument is required to be purchased for measuring the internal resistance of the battery, the application provides a battery internal resistance measuring system for the universal meter.
The application provides a battery internal resistance measurement system for universal meter adopts following technical scheme: the battery internal resistance measuring system for the universal meter comprises a power supply unit, a power supply unit and a power supply unit, wherein the power supply unit is configured to be in signal connection with an external power supply, and is used for performing voltage stabilization and depressurization processing on the voltage of the external power supply and outputting a power supply signal;
the constant current unit (2) is configured to be in signal connection with the output end of the power supply unit and is used for receiving the power supply signal to perform voltage stabilization rectification and outputting a constant current signal;
the frequency generation unit (3) is configured to be in signal connection with the output end of the constant current unit and is used for receiving the constant current signal to carry out frequency fixation and outputting a frequency fixation signal;
the data operational amplifier unit (4) is configured to be in signal connection with the output end of the frequency generation unit and is used for carrying out operational amplification on the received fixed frequency signal and outputting an operational amplifier signal;
and the measuring unit (5) is configured to be in signal connection with the output end of the data operational amplifier unit and is used for receiving the operational amplifier signal and stably measuring the internal resistance of the battery.
Preferably, the power supply unit includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a zener diode D1, a diode D2, an inductor L1, a light-emitting circuit LED2, a light-emitting circuit LED3, a lithium battery master switch K1, a charging chip USB1, a power management chip U1, a zener chip U2, a boosting chip U3, a lithium battery socket H3, a power connection table H4, a voltage source VCC, a power supply positive electrode b+, a power supply negative electrode B-, a power supply positive electrode b1+ and a 3.7V lithium battery B1;
the pin end A9 and the pin end B9 of the charging chip USB1 are electrically connected with the voltage source VCC, the six ground wire ends of the charging chip USB1 are electrically connected with the ground, the pin end A5 of the charging chip USB1 is electrically connected with the eighth resistor R8, the other end of the eighth resistor R8 is electrically connected with the ground wire end of the charging chip USB1, the pin end B5 of the charging chip USB1 is electrically connected with the seventh resistor R7, the other end of the seventh resistor R7 is electrically connected with the tenth capacitor C10, the tenth capacitor C10 is electrically connected with the voltage source VCC, and the tenth capacitor C10 is electrically connected with the second pin end of the voltage stabilizing chip U2;
the second pin end of the power management chip U1 is electrically connected with the ninth resistor R9, the other end of the ninth resistor R9 is electrically connected with the first pin end, the third pin end and the ninth pin end of the power management chip U1, the third pin end of the power management chip U1 is grounded, the eighth pin end of the power management chip U1 is electrically connected with the voltage source VCC, the eighth pin end of the power management chip U1 is electrically connected with the fourth pin end, the sixth pin end and the seventh pin end of the power management chip U1 are respectively electrically connected with the light-emitting loop LED2 and the light-emitting loop LED3, the other ends of the light-emitting loop LED2 and the light-emitting loop LED3 are electrically connected with the tenth resistor R10, the other end of the tenth resistor R10 is electrically connected with the A9 pin end and the B9 pin end of the charging chip USB1, the fifth end of the power management chip U1 is electrically connected with the power anode b+ and the eleventh capacitor C11, and the eleventh capacitor C11 is electrically connected with the eleventh resistor C2;
the first pin end of the voltage stabilizing chip U2 is electrically connected with the twelfth resistor R12, the twelfth resistor R12 is electrically connected with the eleventh capacitor C11, the fifth pin end of the voltage stabilizing chip U2 is electrically connected with the eleventh resistor R11 and the twelfth capacitor C12, the other end of the eleventh resistor R11 is electrically connected with the fifth pin end of the power management chip U1, the other end of the twelfth capacitor C12 is electrically connected with the sixth pin end of the voltage stabilizing chip U2, and the sixth pin end of the voltage stabilizing chip U2 is electrically connected with the third pin end;
the first socket end of the lithium battery socket H3 is electrically connected with the first switch port of the lithium battery master switch K1 and the positive pole B+ of the power supply, the second switch port of the lithium battery master switch K1 is electrically connected with the fourth pin end of the boost chip U3 and the inductor L1, the other end of the inductor L1 is electrically connected with the first pin end of the boost chip U3 and the voltage stabilizing diode D1, the second socket end of the lithium battery socket H3 is electrically connected with the thirteenth capacitor C13, the other end of the thirteenth capacitor C13 is electrically connected with the fifth pin end of the boost chip U3, the anode of the 3.7V lithium battery is electrically connected with the second socket end of the lithium battery socket H3 and the positive pole B+ of the power supply, the cathode of the 3.7V lithium battery is electrically connected with the negative pole B-of the power supply, the second pin end of the boost chip U3 is grounded, the third pin end of the boost chip U3 is electrically connected with the thirteenth resistor R13 and the thirteenth resistor R14, the thirteenth resistor R14 is electrically connected with the fourteenth resistor C14 and the voltage stabilizing diode D14, the fourteenth resistor C14 is electrically connected with the power supply unit, and the fourteenth resistor D14 is electrically connected with the power supply unit.
Preferably, the constant current unit comprises a first resistor R1, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a rectifying chip U4, a voltage stabilizer U6, a power supply anode B1+, a power supply cathode B-and a current detection plug-in H1;
the input end of the voltage stabilizer U6 is electrically connected with the positive electrode B1+ of the power supply, the output end of the voltage stabilizer U6 is electrically connected with the input end of the rectifying chip U4, the ground terminal of the voltage stabilizer U6 is electrically connected with the negative electrode B-of the power supply, the fifth capacitor C5 is electrically connected with the input end of the voltage stabilizer U6, the other end of the fifth capacitor is electrically connected with the ground terminal of the voltage stabilizer U6, the fourth capacitor C4 is electrically connected with the output end of the voltage stabilizer U6, the other end of the fourth capacitor C4 is electrically connected with the ground terminal of the voltage stabilizer U6, the output end of the rectifying chip U4 is electrically connected with the first resistor R1, the other end of the first resistor R1 is electrically connected with the first capacitor C1 and the second terminal of the current detection plug-in H1, the regulating end of the rectifying chip U4 is electrically connected with the second terminal of the current detection plug-in H1, and the output end of the current detection plug-in H1 is electrically connected with the constant-in frequency unit.
Preferably, the frequency generating unit comprises a second resistor R2, a third resistor R3, a second capacitor C2, a third capacitor C3, a sixth capacitor C6, a first adjustable resistor W1, a frequency generating chip U5 and a power supply negative electrode B-;
the VCC end of the frequency generation chip U5 is electrically connected with a first wiring end of a current detection plug-in H1 of the constant current unit and receives constant current, a second pin end and a sixth pin end of the frequency generation chip U5 are electrically connected with the second capacitor C2, the other end of the second capacitor C2 is electrically connected with the third capacitor C3, the other end of the third capacitor C3 is electrically connected with a fifth pin end of the frequency generation chip U5, the second capacitor C2 and the third capacitor C3 are electrically connected with a first pin end of the frequency generation chip U5, the first pin end of the frequency generation chip U5 is an earth terminal and is electrically connected with the power supply negative electrode B-, the second pin end and the sixth pin end of the frequency generation chip U5 are electrically connected with the first adjustable resistor W1, the other end of the first adjustable resistor W1 is electrically connected with the second resistor R2, the third pin end of the frequency generation chip U5 is electrically connected with the third resistor R3, the other end of the frequency generation chip is electrically connected with the third resistor R6, and the third resistor R3 is electrically connected with the output unit is electrically connected with the output signal input end of the constant current unit.
Preferably, the data operational amplifier unit includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a second adjustable resistor W2, a voltage stabilizing chip U7, an operational amplifier chip U8, a power supply positive electrode b+ and a power supply negative electrode B-;
the third pin end of the voltage stabilizing chip U7 is electrically connected with the positive electrode B+ of the power supply, two ends of the eighth capacitor are electrically connected with the third pin end and the first pin end of the voltage stabilizing chip U7 respectively, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the seventh capacitor C7, the other end of the seventh capacitor C7 is electrically connected with the first pin end of the voltage stabilizing chip U7, the first pin end of the voltage stabilizing chip U7 is electrically connected with the negative electrode B-of the power supply, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the eighth pin end and the fourth resistor R4 of the operational amplifier chip U8, the other end of the fourth resistor R4 is electrically connected with the fifth resistor R5 and the third pin end of the operational amplifier chip U8, the other end of the fifth resistor R5 is electrically connected with the measuring unit, the first pin end of the operational amplifier chip U8 is electrically connected with the fourth pin end B-W3 of the fourth resistor U8, the fourth pin end of the fourth resistor R8 is electrically connected with the fourth pin W9 of the fourth resistor U8, the fourth pin of the fourth resistor R4 is electrically connected with the fourth pin of the fourth resistor U8, the fourth pin of the fourth resistor R9 is electrically connected with the fourth pin W9.
Preferably, the measuring unit includes a universal meter black-gauge pen J1, a universal meter red-gauge pen J2 and a second interface component H2, a fifth resistor R5 and a ninth capacitor C9 of the data operational amplifier unit are electrically connected with the second interface component H2, the universal meter black-gauge pen J1 is electrically connected with the second interface component H2, and the universal meter red-gauge pen J2 is electrically connected with the second interface component H2.
Preferably, the second interface component H2 includes four pin ends, a first interface end and a second interface end of the four pin ends are set to be kelvin black ports, a third interface end and a fourth interface end of the four pin ends are set to be kelvin red ports, the multimeter black meter pen J1 is electrically connected with the first interface end, the multimeter red meter pen J2 is electrically connected with the fourth interface end, the fifth resistor R5 is electrically connected with the second interface end, and the ninth capacitor C9 is electrically connected with the third interface end.
In summary, the present application includes the following beneficial effects:
the battery internal resistance measurement system for the universal meter comprises a power supply unit, a constant current unit, a frequency generation unit, a data operational amplifier unit and a measurement unit, wherein the power supply unit outputs a power supply signal to the constant current unit after performing voltage reduction and voltage stabilization treatment on an externally connected voltage source, the constant current unit outputs a constant current signal to the frequency generation unit after performing voltage stabilization and rectification, the frequency generation unit outputs a fixed frequency signal to the data operational amplifier unit after fixing a frequency of a cross flow signal, the data operational amplifier unit outputs an operational amplifier signal to the measurement unit after performing operational amplification on the fixed frequency signal, and the measurement unit can measure the resistance internal resistance to be measured, so that the function of measuring the battery internal resistance of the universal meter can be realized by a common universal meter;
the battery internal resistance measurement module is small in size, is additionally arranged inside the universal meter, is powered by a lithium battery, is externally connected with a Kelvin test clamp for testing the battery internal resistance, and is convenient to carry and measure.
Drawings
FIG. 1 is a schematic diagram of a multimeter battery internal resistance measurement system;
FIG. 2 is a circuit diagram of a power supply unit of a multimeter battery internal resistance measurement system;
FIG. 3 is a circuit diagram of a constant current cell and a circuit diagram of a frequency generation cell of a multimeter battery internal resistance measurement system;
FIG. 4 is a circuit diagram of a data op-amp cell of a multimeter battery internal resistance measurement system;
fig. 5 is a circuit diagram of a measurement unit of a battery internal resistance measurement system for a multimeter.
Reference numerals illustrate: 1. a power supply unit; 2. a constant current unit; 3. a frequency generation unit; 4. a data operational amplifier unit; 5. and a measuring unit.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-5.
The embodiment of the application discloses a battery internal resistance measurement system for a universal meter.
Referring to fig. 1, a battery internal resistance measurement system for a multimeter includes a power supply unit 1 configured to be in signal connection with an external voltage source, and configured to perform voltage reduction and stabilization processing on a voltage of the external voltage source and output a power supply signal; the constant current unit 2 is configured to be in signal connection with the output end of the power supply unit 1 and is used for receiving a power supply signal to perform voltage stabilization rectification and outputting a constant current signal; the frequency generation unit 3 is configured to be in signal connection with the output end of the constant current unit 2 and is used for receiving the constant current signal to carry out frequency fixation and outputting a frequency fixation signal; the data operational amplifier unit 4 is configured to be in signal connection with the output end of the frequency generation unit 3 and is used for carrying out operational amplification on the received fixed frequency signal and outputting an operational amplifier signal; and the measuring unit 5 is configured to be in signal connection with the output end of the data operational amplifier unit 4 and is used for receiving the operational amplifier signal and measuring the internal resistance of the battery to be measured.
Referring to fig. 2, the power supply unit 1 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a zener diode D1, a diode D2, an inductor L1, a light emitting circuit LED2, a light emitting circuit LED3, a lithium battery master switch K1, a charging chip USB1, a power management chip U1, a zener chip U2, a boosting chip U3, a lithium battery socket H3, a power connection table H4, a voltage source VCC, a power supply positive electrode b+, a power supply negative electrode B-, a power supply positive electrode b1+ and a 3.7V lithium battery B1;
the A9 pin end and the B9 pin end of the charging chip USB1 are electrically connected with a voltage source VCC, the six ground wire ends of the charging chip USB1 are electrically connected with the ground, the A5 pin end of the charging chip USB1 is electrically connected with an eighth resistor R8, the other end of the eighth resistor R8 is electrically connected with the ground wire end of the charging chip USB1, the B5 pin end of the charging chip USB1 is electrically connected with a seventh resistor R7, the other end of the seventh resistor R7 is electrically connected with a tenth capacitor C10, the tenth capacitor C10 is electrically connected with the voltage source VCC, and the tenth capacitor C10 is electrically connected with the second pin end of the voltage stabilizing chip U2;
the second pin end of the power management chip U1 is electrically connected with a ninth resistor R9, the other end of the ninth resistor R9 is electrically connected with the first pin end, the third pin end and the ninth pin end of the power management chip U1, the third pin end of the power management chip U1 is grounded, the eighth pin end of the power management chip U1 is electrically connected with a voltage source VCC, the eighth pin end of the power management chip U1 is electrically connected with a fourth pin end, the sixth pin end and the seventh pin end of the power management chip U1 are respectively electrically connected with a light-emitting loop LED2 and a light-emitting loop LED3, the other ends of the light-emitting loop LED2 and the light-emitting loop LED3 are electrically connected with a tenth resistor R10, the other end of the tenth resistor R10 is electrically connected with the A9 pin end and the B9 pin end of the charging chip USB1, the fifth pin end of the power management chip U1 is electrically connected with a power anode B+ and an eleventh capacitor C11, and the eleventh capacitor C11 is electrically connected with the second end of the voltage-stabilizing chip U2;
the first pin end of the voltage stabilizing chip U2 is electrically connected with the twelfth resistor R12, the twelfth resistor R12 is electrically connected with the eleventh capacitor C11, the fifth pin end of the voltage stabilizing chip U2 is electrically connected with the eleventh resistor R11 and the twelfth capacitor C12, the other end of the eleventh resistor R11 is electrically connected with the fifth pin end of the power management chip U1, the other end of the twelfth capacitor C12 is electrically connected with the sixth pin end of the voltage stabilizing chip U2, and the sixth pin end of the voltage stabilizing chip U2 is electrically connected with the third pin end;
the first socket end of the lithium battery socket H3 is electrically connected with a first switch port of the lithium battery master switch K1 and a power supply positive electrode B+, the second switch port of the lithium battery master switch K1 is electrically connected with a fourth pin end of the boost chip U3 and an inductor L1, the other end of the inductor L1 is electrically connected with a first pin end of the boost chip U3 and a voltage stabilizing diode D1, the second socket end of the lithium battery socket H3 is electrically connected with a thirteenth capacitor C13, the other end of the thirteenth capacitor C13 is electrically connected with a fifth pin end of the boost chip U3, an anode of a 3.7V lithium battery is electrically connected with a second socket end of the lithium battery socket H3 and a power supply positive electrode B+, a cathode of the 3.7V lithium battery is electrically connected with a power supply negative electrode B-, the second pin end of the boost chip U3 is grounded, the third pin end of the boost chip U3 is electrically connected with a thirteenth resistor R13 and a fourteenth resistor R14, the thirteenth resistor R13 and the fourteenth resistor R14 are connected with the fourteenth capacitor C14 in parallel, the other end of the thirteenth resistor C13 is electrically connected with the voltage stabilizing diode D1 and the voltage stabilizing diode D2, and the power supply unit is connected with the fourteenth capacitor H2 through a constant current meter, and the constant current meter is connected with the constant current meter 4H 2. The charging chip USB1 is used for receiving the voltage of the voltage source VCC, the power management chip U1 is used for monitoring and managing the charging voltage and can monitor through the luminous loops LED2 and LED3, the voltage stabilizing chip U2 is set to be an MOS tube chip and used for carrying out voltage stabilizing protection on voltage signals entering the lithium battery, the boosting chip U3 is used for boosting the voltage signals output by the lithium battery and transmitting the voltage signals after voltage generation to the constant current unit 2, and the power supply function is realized.
Referring to fig. 3, the constant current unit 2 includes a first resistor R1, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a rectifying chip U4, a voltage regulator U6, a power supply anode b1+, a power supply cathode B-and a current detection plug-in H1;
the input end of the voltage stabilizer U6 is electrically connected with the positive electrode B1+ of the power supply, the output end of the voltage stabilizer U6 is electrically connected with the input end of the rectifying chip U4, the ground terminal of the voltage stabilizer U6 is electrically connected with the negative electrode B-of the power supply, the fifth capacitor C5 is electrically connected with the input end of the voltage stabilizer U6, the other end of the fifth capacitor is electrically connected with the ground terminal of the voltage stabilizer U6, the fourth capacitor C4 is electrically connected with the output end of the voltage stabilizer U6, the other end of the fourth capacitor C4 is electrically connected with the ground terminal of the voltage stabilizer U6, the output end of the rectifying chip U4 is electrically connected with the first resistor R1, the other end of the first resistor R1 is electrically connected with the first capacitor C1 and the second terminal of the current detection plug-in H1, the adjusting end of the rectifying chip U4 is electrically connected with the second terminal of the current detection plug-in H1, and the first terminal of the current detection plug-in H1 is electrically connected with the input end of the frequency generation unit 3, and constant current is output.
Referring to fig. 3, the frequency generating unit 3 includes a second resistor R2, a third resistor R3, a second capacitor C2, a third capacitor C3, a sixth capacitor C6, a first adjustable resistor W1, a frequency generating chip U5, and a power supply negative electrode B-;
the VCC end of the frequency generation chip U5 is electrically connected with a first wiring end of a current detection plug H1 of the constant current unit 2, constant current is received, a second pin end and a sixth pin end of the frequency generation chip U5 are electrically connected with a second capacitor C2, the other end of the second capacitor C2 is electrically connected with a third capacitor C3, the other end of the third capacitor C3 is electrically connected with a fifth pin end of the frequency generation chip U5, the second capacitor C2 and the third capacitor C3 are electrically connected with a first pin end of the frequency generation chip U5, the first pin end of the frequency generation chip U5 is an earth terminal and is electrically connected with a power supply negative electrode B-, the second pin end and the sixth pin end of the frequency generation chip U5 are electrically connected with a first adjustable resistor W1, the other end of the first adjustable resistor W1 is electrically connected with a second resistor R2, the other end of the frequency generation chip U5 is electrically connected with a third resistor R2, the second resistor R2 is serially connected with a sixth capacitor C6, the other end of the sixth capacitor C6 is electrically connected with a third resistor R3, and the third resistor R3 is electrically connected with a data input/output unit fixedly outputs signals.
Referring to fig. 4, the data operational amplifier unit 4 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a second adjustable resistor W2, a voltage stabilizing chip U7, an operational amplifier chip U8, a power supply positive electrode b+ and a power supply negative electrode B-;
the third pin end of the voltage stabilizing chip U7 is electrically connected with the positive electrode B+ of the power supply, two ends of the eighth capacitor C8 are respectively electrically connected with the third pin end and the first pin end of the voltage stabilizing chip U7, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the seventh capacitor C7, the other end of the seventh capacitor C7 is electrically connected with the first pin end of the voltage stabilizing chip U7, the first pin end and the negative electrode B-of the power supply are electrically connected, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the eighth pin end and the fourth resistor R4 of the operational amplifier chip U8, the other end of the fourth resistor R4 is electrically connected with the fifth resistor R5 and the third pin end of the operational amplifier chip U8, the other end of the fifth resistor R5 is electrically connected with the measuring unit, the fourth pin end of the operational amplifier chip U8 is electrically connected with the negative electrode B-of the power supply, the third resistor R3 of the frequency generating unit is electrically connected with the second pin end and the sixth resistor R6 of the operational amplifier chip U8, the other end of the fourth resistor R6 is electrically connected with the fourth pin end of the operational amplifier chip U8, the fourth resistor W2 is electrically connected with the other end of the fourth resistor U8, and the fourth resistor W2 is electrically connected with the other end of the fourth resistor U8. The voltage stabilizing chip U7 is used for stabilizing the voltage of the signal of the positive electrode B+ of the power supply, and the operational amplifier chip U8 is used for amplifying the received signals from the operational amplifier chip U8 and the frequency generator unit 3.
Referring to fig. 5, the measuring unit 5 includes a multimeter black-gauge pen J1, a multimeter red-gauge pen J2 and a second interface component H2, the fifth resistor R5 and the ninth capacitor C9 of the data operational amplifier unit 4 are electrically connected with the second interface component H2, the multimeter black-gauge pen J1 is electrically connected with the second interface component H2, and the multimeter red-gauge pen J2 is electrically connected with the second interface component H2; the second interface assembly H2 comprises four pin ends, wherein a first interface end and a second interface end of the four pin ends are arranged to be Kelvin black ports, a third interface end and a fourth interface end are arranged to be Kelvin red ports, a universal meter black pen J1 is electrically connected with the first interface end, a universal meter red pen J2 is electrically connected with the fourth interface end, a fifth resistor R5 is electrically connected with the second interface end, and a ninth capacitor C9 is electrically connected with the third interface end. The universal meter black gauge pen J1 and the universal meter red gauge pen J2 are externally connected to the outside of the universal meter, so that the battery resistance can be conveniently measured.
The implementation principle of the battery internal resistance measurement system for the universal meter is as follows: the external power supply is subjected to voltage stabilization and depressurization processing through the power supply unit 1, a power supply signal is output to the constant current unit 2, the constant current unit 2 is subjected to voltage stabilization and rectification, a constant current signal is output to the frequency generation unit 3, the frequency generation unit 3 is used for fixing the frequency of the cross flow signal, a fixed frequency signal is output to the data operational amplifier unit 4, the data operational amplifier unit 4 is used for carrying out operational amplification on the fixed frequency signal and outputting the fixed frequency signal to the measurement unit 5, and the measurement unit 5 can be used for measuring the resistance and the internal resistance to be measured.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. The battery internal resistance measurement system for the universal meter is characterized by comprising a power supply unit (1) which is configured to be in signal connection with an external power supply, and is used for carrying out voltage stabilization and depressurization processing on the voltage of the external power supply and outputting a power supply signal;
the constant current unit (2) is configured to be in signal connection with the output end of the power supply unit and is used for receiving the power supply signal to perform voltage stabilization rectification and outputting a constant current signal;
the frequency generation unit (3) is configured to be in signal connection with the output end of the constant current unit and is used for receiving the constant current signal to carry out frequency fixation and outputting a frequency fixation signal;
the data operational amplifier unit (4) is configured to be in signal connection with the output end of the frequency generation unit and is used for carrying out operational amplification on the received fixed frequency signal and outputting an operational amplifier signal;
and the measuring unit (5) is configured to be in signal connection with the output end of the data operational amplifier unit and is used for receiving the operational amplifier signal and stably measuring the internal resistance of the battery.
2. The internal resistance measurement system for a multimeter battery according to claim 1, wherein: the power supply unit (1) comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a voltage stabilizing diode D1, a diode D2, an inductor L1, a light emitting loop LED2, a light emitting loop LED3, a lithium battery master switch K1, a charging chip USB1, a power management chip U1, a voltage stabilizing chip U2, a boosting chip U3, a lithium battery socket H3, a power connection table H4, a voltage source VCC, a power supply anode B+, a power supply cathode B-, a power supply anode B1+ and a 3.7V lithium battery B1;
the pin end A9 and the pin end B9 of the charging chip USB1 are electrically connected with the voltage source VCC, the six ground wire ends of the charging chip USB1 are electrically connected with the ground, the pin end A5 of the charging chip USB1 is electrically connected with the eighth resistor R8, the other end of the eighth resistor R8 is electrically connected with the ground wire end of the charging chip USB1, the pin end B5 of the charging chip USB1 is electrically connected with the seventh resistor R7, the other end of the seventh resistor R7 is electrically connected with the tenth capacitor C10, the tenth capacitor C10 is electrically connected with the voltage source VCC, and the tenth capacitor C10 is electrically connected with the second pin end of the voltage stabilizing chip U2;
the second pin end of the power management chip U1 is electrically connected with the ninth resistor R9, the other end of the ninth resistor R9 is electrically connected with the first pin end, the third pin end and the ninth pin end of the power management chip U1, the third pin end of the power management chip U1 is grounded, the eighth pin end of the power management chip U1 is electrically connected with the voltage source VCC, the eighth pin end of the power management chip U1 is electrically connected with the fourth pin end, the sixth pin end and the seventh pin end of the power management chip U1 are respectively electrically connected with the light-emitting loop LED2 and the light-emitting loop LED3, the other ends of the light-emitting loop LED2 and the light-emitting loop LED3 are electrically connected with the tenth resistor R10, the other end of the tenth resistor R10 is electrically connected with the A9 pin end and the B9 pin end of the charging chip USB1, the fifth end of the power management chip U1 is electrically connected with the power anode b+ and the eleventh capacitor C11, and the eleventh capacitor C11 is electrically connected with the eleventh resistor C2;
the first pin end of the voltage stabilizing chip U2 is electrically connected with the twelfth resistor R12, the twelfth resistor R12 is electrically connected with the eleventh capacitor C11, the fifth pin end of the voltage stabilizing chip U2 is electrically connected with the eleventh resistor R11 and the twelfth capacitor C12, the other end of the eleventh resistor R11 is electrically connected with the fifth pin end of the power management chip U1, the other end of the twelfth capacitor C12 is electrically connected with the sixth pin end of the voltage stabilizing chip U2, and the sixth pin end of the voltage stabilizing chip U2 is electrically connected with the third pin end;
the first socket end of the lithium battery socket H3 is electrically connected with the first switch port of the lithium battery master switch K1 and the positive pole B+ of the power supply, the second switch port of the lithium battery master switch K1 is electrically connected with the fourth pin end of the boost chip U3 and the inductor L1, the other end of the inductor L1 is electrically connected with the first pin end of the boost chip U3 and the voltage stabilizing diode D1, the second socket end of the lithium battery socket H3 is electrically connected with the thirteenth capacitor C13, the other end of the thirteenth capacitor C13 is electrically connected with the fifth pin end of the boost chip U3, the anode of the 3.7V lithium battery is electrically connected with the second socket end of the lithium battery socket H3 and the positive pole B+ of the power supply, the cathode of the 3.7V lithium battery is electrically connected with the negative pole B-of the power supply, the second pin end of the boost chip U3 is grounded, the third pin end of the boost chip U3 is electrically connected with the thirteenth resistor R13 and the thirteenth resistor R14, the thirteenth resistor R14 is electrically connected with the fourteenth resistor C14 and the voltage stabilizing diode D14, and the fourteenth resistor C14 is electrically connected with the power supply unit (the current stabilizing diode D2 and the power supply unit is connected with the fourteenth resistor C2).
3. The internal resistance measurement system for a multimeter battery according to claim 1, wherein: the constant current unit (2) comprises a first resistor R1, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a rectifying chip U4, a voltage stabilizer U6, a power supply anode B1+, a power supply cathode B-and a current detection plug-in H1;
the input end of the voltage stabilizer U6 is electrically connected with the positive electrode B1+ of the power supply, the output end of the voltage stabilizer U6 is electrically connected with the input end of the rectifying chip U4, the ground terminal of the voltage stabilizer U6 is electrically connected with the negative electrode B-of the power supply, the fifth capacitor C5 is electrically connected with the input end of the voltage stabilizer U6, the other end of the fifth capacitor is electrically connected with the ground terminal of the voltage stabilizer U6, the fourth capacitor C4 is electrically connected with the output end of the voltage stabilizer U6, the other end of the fourth capacitor C4 is electrically connected with the ground terminal of the voltage stabilizer U6, the output end of the rectifying chip U4 is electrically connected with the first resistor R1, the other end of the first resistor R1 is electrically connected with the first capacitor C1 and the second terminal of the current detection plug-in H1, the adjusting end of the rectifying chip U4 is electrically connected with the second terminal of the current detection plug-in H1, and the other end of the current detection plug-in H1 is electrically connected with the first terminal of the constant frequency generation unit (3).
4. A multimeter battery internal resistance measurement system according to claim 3, wherein: the frequency generation unit (3) comprises a second resistor R2, a third resistor R3, a second capacitor C2, a third capacitor C3, a sixth capacitor C6, a first adjustable resistor W1, a frequency generation chip U5 and a power supply negative electrode B-;
the VCC end of the frequency generation chip U5 is electrically connected with a first wiring end of a current detection plug-in H1 of the constant current unit (2), constant current is received, the second and sixth pin ends of the frequency generation chip U5 are electrically connected with the second capacitor C2, the other end of the second capacitor C2 is electrically connected with the third capacitor C3, the other end of the third capacitor C3 is electrically connected with a fifth pin end of the frequency generation chip U5, the second and third capacitors C2 and C3 are electrically connected with a first pin end of the frequency generation chip U5, the first pin end of the frequency generation chip U5 is a ground terminal and is electrically connected with the power supply negative electrode B-, the second and sixth pin ends of the frequency generation chip U5 are electrically connected with the first adjustable resistor W1, the other end of the first adjustable resistor W1 is electrically connected with the second resistor R2, the third pin end of the frequency generation chip U5 is electrically connected with the third resistor R3, the third resistor R3 is electrically connected with the third resistor R6, and the third resistor R3 is electrically connected with the output unit (the data input end of the constant current unit is electrically connected with the constant current unit).
5. The internal resistance measurement system for a multimeter battery according to claim 1, wherein: the data operational amplifier unit (4) comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a second adjustable resistor W2, a voltage stabilizing chip U7, an operational amplifier chip U8, a power supply positive electrode B+ and a power supply negative electrode B-;
the third pin end of the voltage stabilizing chip U7 is electrically connected with the positive electrode B+ of the power supply, two ends of the eighth capacitor are electrically connected with the third pin end and the first pin end of the voltage stabilizing chip U7 respectively, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the seventh capacitor C7, the other end of the seventh capacitor C7 is electrically connected with the first pin end of the voltage stabilizing chip U7, the first pin end of the voltage stabilizing chip U7 is electrically connected with the negative electrode B-of the power supply, the second pin end and the fourth pin end of the voltage stabilizing chip U7 are electrically connected with the eighth pin end and the fourth resistor R4 of the operational amplifier chip U8, the other end of the fourth resistor R4 is electrically connected with the fifth resistor R5 and the third pin end of the operational amplifier chip U8, the other end of the fifth resistor R5 is electrically connected with the measuring unit, the first pin end of the operational amplifier chip U8 is electrically connected with the fourth pin end B-U8, the fourth pin end of the fourth resistor R3 is electrically connected with the fourth pin end of the operational amplifier chip U8, the fourth pin of the fourth resistor R4 is electrically connected with the fourth pin end of the fourth resistor U8, the fourth pin of the fourth resistor R8 is electrically connected with the fourth pin U8, the fourth pin of the fourth resistor R9 is electrically connected with the fourth pin of the fourth resistor U8, the fourth pin is electrically connected with the fourth resistor U8.
6. The internal resistance measurement system for a multimeter battery according to claim 5, wherein: the measuring unit (5) comprises a universal meter black meter pen J1, a universal meter red meter pen J2 and a second interface component H2, a fifth resistor R5 and a ninth capacitor C9 of the data operational amplifier unit (4) are electrically connected with the second interface component H2, the universal meter black meter pen J1 is electrically connected with the second interface component H2, and the universal meter red meter pen J2 is electrically connected with the second interface component H2.
7. The internal resistance measurement system for a multimeter battery of claim 6, wherein: the second interface assembly H2 comprises four pin ends, a first interface end and a second interface end of the four pin ends are arranged to be Kelvin black ports, a third interface end and a fourth interface end of the four pin ends are arranged to be Kelvin red ports, the universal meter black meter pen J1 is electrically connected with the first interface end, the universal meter red meter pen J2 is electrically connected with the fourth interface end, the fifth resistor R5 is electrically connected with the second interface end, and the ninth capacitor C9 is electrically connected with the third interface end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565432.8U CN220340366U (en) | 2023-06-19 | 2023-06-19 | Battery internal resistance measurement system for universal meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321565432.8U CN220340366U (en) | 2023-06-19 | 2023-06-19 | Battery internal resistance measurement system for universal meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220340366U true CN220340366U (en) | 2024-01-12 |
Family
ID=89445057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321565432.8U Active CN220340366U (en) | 2023-06-19 | 2023-06-19 | Battery internal resistance measurement system for universal meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220340366U (en) |
-
2023
- 2023-06-19 CN CN202321565432.8U patent/CN220340366U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105914836B (en) | Chargeable portable pA micro-current monitors system | |
| CN206209042U (en) | Instrument for testing polarity of current transformer | |
| CN110687478A (en) | Non-contact wireless pincerlike arrester live-line detection device and test method | |
| CN104330187B (en) | A kind of system for detecting temperature of achievable battery saving mode | |
| CN207882428U (en) | A kind of portable electric energy measurent wiring calibration equipment | |
| CN220340366U (en) | Battery internal resistance measurement system for universal meter | |
| CN207908608U (en) | Metering device wire searcher | |
| CN101533054A (en) | Battery casing insulation detection device | |
| CN208902788U (en) | A kind of current detection circuit of switching circuit | |
| CN104577240B (en) | The determination method of lithium ion accumulator and its characteristic with measurement battery | |
| CN205786846U (en) | A kind of metering device with high precision test electric energy function | |
| CN106556737B (en) | A kind of digital current voltmeter interface circuit based on Hall current sensor | |
| CN109444753A (en) | Electric quantity detecting circuit, method and audio frequency apparatus | |
| CN211402702U (en) | Single-phase electric energy meter field calibration instrument with built-in virtual load circuit | |
| CN104502673A (en) | AC-DC general current true RMS transmitter | |
| CN107861093B (en) | Portable electric energy metering wiring verification device | |
| CN204855658U (en) | Vehicle -specific does not have multi -functional electroscope of lead wire | |
| CN208969163U (en) | Electric energy metering device and electrical energy measurement processing module, the electrical parameter detection circuit of voltage detecting circuit | |
| CN211043621U (en) | Storage battery impedance measuring device | |
| CN104181370A (en) | Load current detection circuit and detection device | |
| CN209541918U (en) | A kind of contactless temperature-measuring sensor | |
| CN207798930U (en) | Wireless DC electricity tester | |
| CN207636728U (en) | A kind of dc-battery internal resistance Acquisition Instrument of simplified four-wire method | |
| CN112345810A (en) | Current measuring device based on Hall sensor and measuring method thereof | |
| CN110579719A (en) | Storage battery impedance measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |