CN116461387B - Unmanned aerial vehicle battery serial connection charge balance circuit - Google Patents
Unmanned aerial vehicle battery serial connection charge balance circuit Download PDFInfo
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- CN116461387B CN116461387B CN202310351083.8A CN202310351083A CN116461387B CN 116461387 B CN116461387 B CN 116461387B CN 202310351083 A CN202310351083 A CN 202310351083A CN 116461387 B CN116461387 B CN 116461387B
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- 230000004913 activation Effects 0.000 claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/24—Aircraft characterised by the type or position of power plants using steam or spring force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/10—Air crafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a serial charging balance circuit of an unmanned aerial vehicle battery, which comprises an activation circuit, a voltage control circuit, a current control circuit and a current output circuit, wherein the activation circuit is connected with the voltage control circuit; the activation circuit is connected with the anode and the cathode of the battery; the activation circuit is respectively connected with the voltage control circuit, the current control circuit and the current output circuit; the output end of the voltage control circuit is connected with the current control circuit, and the output end of the current control circuit is connected with the current output circuit; the voltage control circuit, the voltage control circuit and the current output circuit are also respectively connected with the cathode of the battery; the invention can realize the charge balance of the unmanned aerial vehicle battery, effectively prolong the service life of the battery, and has the advantages of simple structure, good practicability and the like.
Description
Technical Field
The invention relates to the technical field of battery charging, in particular to a serial charging balance circuit of an unmanned aerial vehicle battery.
Background
With the progress of battery and control technology, unmanned aerial vehicle technology has been rapidly developed, and has been widely used in many fields. The unmanned plane has the advantage of high flexibility, and has shown huge application prospect in the fields of investigation, survey, agriculture, inspection, and the like. However, due to the limited self-loading capacity and limited volume, the battery capacity of the unmanned aerial vehicle is limited, and the unmanned aerial vehicle has a short duration (generally about 30 minutes) and needs to be continuously dropped on the ground for charging during use. The existing unmanned aerial vehicle battery is basically formed by connecting a plurality of single lithium batteries in series, so that a battery pack is formed for use. However, because of the variability of individuals, the conditions among the batteries are different, and meanwhile, because the unmanned aerial vehicle is frequently charged, higher requirements are required to be put forward for charging the unmanned aerial vehicle, so that the charging efficiency and the service life of the batteries are ensured.
Disclosure of Invention
The invention aims to provide a battery serial charging balance circuit of an unmanned aerial vehicle. The invention can realize the charge balance of the unmanned aerial vehicle battery, effectively prolong the service life of the battery, and has the advantages of simple structure, good practicability and the like.
The technical scheme of the invention is as follows: a serial charging balance circuit of an unmanned aerial vehicle battery comprises an activation circuit, a voltage control circuit, a current control circuit and a current output circuit; the activation circuit is connected with the anode and the cathode of the battery; the activation circuit is respectively connected with the voltage control circuit, the current control circuit and the current output circuit; the output end of the voltage control circuit is connected with the current control circuit, and the output end of the current control circuit is connected with the current output circuit; the voltage control circuit, the voltage control circuit and the current output circuit are also respectively connected with the cathode of the battery;
the activation circuit monitors whether the charging voltage of the unmanned aerial vehicle battery reaches the rated voltage in real time, and if the charging voltage reaches the rated voltage, the voltage control circuit connected with the unmanned aerial vehicle battery starts working; the voltage control circuit obtains a difference value between the battery voltage and the maximum charging voltage and obtains a control voltage; the current control circuit converts the control voltage obtained by the voltage control circuit into control current; the current output circuit amplifies the control current, regulates the actual charging current of the battery, stabilizes the charging voltage of the unmanned aerial vehicle battery at the maximum charging voltage, and further realizes balance control of serial charging of the unmanned aerial vehicle battery.
The unmanned aerial vehicle battery serial connection charge balance circuit comprises a voltage stabilizing diode Z1, a resistor R2, an NPN tube Q1 and a PNP tube Q2; the cathode of the voltage stabilizing diode Z1 and the emitter of the PNP tube Q2 are connected with the anode of the battery together; the positive pole of zener diode Z1 is connected with one end of resistance R1, and resistance R1's the other end is connected with NPN pipe Q1's base, and NPN pipe Q1's projecting pole is connected with the negative pole of battery, and NPN pipe Q1's collecting electrode is connected with resistance R2's one end, and resistance R2's the other end is connected with PNP pipe Q2's base, and PNP pipe Q2's collecting electrode is connected with voltage control circuit, current control circuit and current output circuit.
The aforementioned unmanned aerial vehicle battery serial connection charge balance circuit, the voltage control circuit includes a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a controllable precision voltage stabilizing source TL431 and an optocoupler OP1; one end of the resistor R3 is connected with the collector of the PNP tube Q2, the other end of the resistor R3 is connected with one end of the resistor R4, and the other end of the resistor R4 is connected with the negative electrode of the battery; the input end of the controllable precise voltage stabilizing source TL431 is connected between the resistor R3 and the resistor R4, and the anode of the controllable precise voltage stabilizing source TL431 is connected with the cathode of the battery; one end of the resistor R5 is connected between the resistor R3 and the resistor R4, the other end of the resistor R5 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the cathode of the controllable precise voltage stabilizing source TL431 together with the cathode of the light emitting diode of the optical coupler OP1, the anode of the light emitting diode of the optical coupler OP1 is connected with one end of the resistor R6, and the other end of the resistor R6 is connected with the collector of the PNP tube Q2; the C electrode of the optical coupler OP1 is connected with the collector electrode of the PNP tube Q2, and the E electrode of the optical coupler OP1 is connected with one end of the resistor R7 and the current control circuit; the other end of the resistor R7 is connected with the negative electrode of the battery.
4. The unmanned aerial vehicle battery serial charge balance circuit of claim 3, wherein: the current control circuit comprises a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an operational amplifier A1 and an operational amplifier A2; the negative electrode of the operational amplifier A1 is connected with one end of a resistor R9, and the other end of the resistor R9 is grounded; the positive electrode of the operational amplifier A1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected between the E electrode of the optical coupler OP1 and a resistor R7; the output end of the operational amplifier A1 is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the anode of the operational amplifier A2 and a current output circuit; one end of the resistor R10 is connected between the negative electrode of the operational amplifier A1 and the resistor R9, and the other end of the resistor R10 is connected between the output end of the operational amplifier A1 and the resistor R12; the negative electrode and the output end of the operational amplifier A2 are connected with one end of a resistor R11, and the other end of the resistor R11 is connected between the positive electrode of the operational amplifier A1 and a resistor R8.
The unmanned aerial vehicle serial battery charging balance circuit comprises a resistor R13 and an NPN tube Q3; the emitter of the NPN tube Q3 is connected with the negative electrode of the lithium battery, the base electrode of the NPN tube Q3 is connected between the resistor R12 and the positive electrode of the operational amplifier A2, the collector of the NPN tube Q3 is connected with one end of the resistor R13, and the other end of the resistor R13 is connected with the collector of the PNP tube Q2.
Compared with the prior art, the activation circuit can monitor whether the battery charging voltage of the unmanned aerial vehicle reaches the rated voltage in real time, if so, the voltage control circuit connected with the activation circuit starts to work, the voltage control circuit acquires the difference between the battery voltage and the maximum charging voltage and obtains the control voltage, then the current control circuit converts the control voltage obtained by the voltage control circuit into control current, the current output circuit amplifies the control current, the magnitude of the actual charging current of the battery is regulated, the battery charging voltage of the unmanned aerial vehicle is stabilized at the maximum charging voltage, and further balance control of serial charging of the unmanned aerial vehicle battery is realized. In addition, the invention has the advantages of simple structure, low cost, good practicality, high modularization degree and good universality.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is further described in connection with the accompanying drawings and examples which are not to be construed as limiting the invention, but are intended to cover the full scope of the claims and will become more fully apparent to those of ordinary skill in the art from the following examples.
Examples: the serial charging balance circuit of the unmanned aerial vehicle battery is applied to N serial unmanned aerial vehicle batteries as shown in figure 1, and the positive electrode of each battery is provided with a charging balance circuit; the charge balance circuit comprises an activation circuit, a voltage control circuit, a current control circuit and a current output circuit; the activation circuit is connected with the anode and the cathode of the battery; the activation circuit is respectively connected with the voltage control circuit, the current control circuit and the current output circuit; the output end of the voltage control circuit is connected with the current control circuit, and the output end of the current control circuit is connected with the current output circuit; the voltage control circuit, the voltage control circuit and the current output circuit are also respectively connected with the cathode of the battery;
the method for working is that the activation circuit monitors whether the charging voltage of the unmanned aerial vehicle battery reaches the rated voltage in real time, and if the charging voltage reaches the rated voltage, the voltage control circuit connected with the charging voltage control circuit starts working; the voltage control circuit obtains a difference value between the battery voltage and the maximum charging voltage and obtains a control voltage; the current control circuit converts the control voltage obtained by the voltage control circuit into control current; the current output circuit amplifies the control current, regulates the actual charging current of the battery, stabilizes the charging voltage of the unmanned aerial vehicle battery at the maximum charging voltage, and further realizes balance control of serial charging of the unmanned aerial vehicle battery.
In this embodiment, as shown in fig. 1, the activation circuit includes a zener diode Z1, a resistor R2, an NPN transistor Q1, and a PNP transistor Q2; the cathode of the voltage stabilizing diode Z1 and the emitter of the PNP tube Q2 are connected with the anode of the battery together; the positive pole of zener diode Z1 is connected with one end of resistance R1, and resistance R1's the other end is connected with NPN pipe Q1's base, and NPN pipe Q1's projecting pole is connected with the negative pole of battery, and NPN pipe Q1's collecting electrode is connected with resistance R2's one end, and resistance R2's the other end is connected with PNP pipe Q2's base, and PNP pipe Q2's collecting electrode is connected with voltage control circuit, current control circuit and current output circuit. By reasonably selecting parameters of Z1, R1 and Q1, the battery is ensured to reach rated voltage V normal Q1 is on. Because the base current of the Q2 is the collector current of the Q1, the saturated conduction state can be further quickly entered, and the starting control function is further realized.
According to the battery charging specification, the battery voltage is lower than V normal When the battery is in a high current charging phase. Q1 is at V E ＝V normal The conduction can ensure that the charging control circuit is not shunted when the battery is charged with large current, and the charging speed and the charging efficiency are improved. In addition, anotherOn the one hand, the battery voltage reaches V normal When the charging control circuit is in a full state, the charging control circuit starts to operate. Because the charging current is smaller, the current is very small when the charging control circuit works, and the heating loss can be effectively reduced while the voltage clamping of the battery is realized.
In this embodiment, as shown in fig. 1, the voltage control circuit includes a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a controllable precision voltage stabilizing source TL431 and an optocoupler OP1; one end of the resistor R3 is connected with the collector of the PNP tube Q2, the other end of the resistor R3 is connected with one end of the resistor R4, and the other end of the resistor R4 is connected with the negative electrode of the battery; the input end of the controllable precise voltage stabilizing source TL431 is connected between the resistor R3 and the resistor R4, and the anode of the controllable precise voltage stabilizing source TL431 is connected with the cathode of the battery; one end of the resistor R5 is connected between the resistor R3 and the resistor R4, the other end of the resistor R5 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the cathode of the controllable precise voltage stabilizing source TL431 together with the cathode of the light emitting diode of the optical coupler OP1, the anode of the light emitting diode of the optical coupler OP1 is connected with one end of the resistor R6, and the other end of the resistor R6 is connected with the collector of the PNP tube Q2; the C electrode of the optical coupler OP1 is connected with the collector electrode of the PNP tube Q2, and the E electrode of the optical coupler OP1 is connected with one end of the resistor R7 and the current control circuit; the other end of the resistor R7 is connected with the negative electrode of the battery. Wherein R3 and R4 form a sampling circuit for sampling the voltage of the battery E to obtain a sampling voltage v f The method comprises the following steps:V E is the battery voltage. TL431 is a difference circuit, and is based on the principle that v is obtained by f Difference V between built-in 2.5V with TL431 f -2.5, thereby controlling the degree of conduction between the cathode and anode of TL 431. R5 and C1 form a PI compensation circuit for the difference voltage v f -2.5 performing PI operation to obtain a control quantity u c1 . R6 is a current limiting resistor, limiting TL431 and OP1 input side current. OP1 and R7 form an inverter to realize u c1 Is subjected to an inversion operation to obtain a control quantity u c R7 is a current limiting resistor.
Voltage control circuitThe working principle is as follows: when (when)When (i.e. v f < 2.5), TL431 off, OP1 off, u c1 ＝V E ，u c =0; when->When (i.e. v f > 2.5), TL431 is on, u c1 For the difference voltage v f -2.5 performing PI operation to obtain u c1 ，v f The greater the difference of-2.5, the closer the corresponding TL431 is to saturated conduction, u c1 Also smaller, u c1 V is f -2.5 inverse PI operation. OP1 implementation vs u c1 Is subjected to an inversion operation to obtain a control quantity u c That is, u c V is f -PI operation of 2.5.
In this embodiment, as shown in fig. 1, the current control circuit includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an operational amplifier A1, and an operational amplifier A2; the negative electrode of the operational amplifier A1 is connected with one end of a resistor R9, and the other end of the resistor R9 is grounded; the positive electrode of the operational amplifier A1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected between the E electrode of the optical coupler OP1 and a resistor R7; the output end of the operational amplifier A1 is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the anode of the operational amplifier A2 and a current output circuit; one end of the resistor R10 is connected between the negative electrode of the operational amplifier A1 and the resistor R9, and the other end of the resistor R10 is connected between the output end of the operational amplifier A1 and the resistor R12; the negative electrode and the output end of the operational amplifier A2 are connected with one end of a resistor R11, and the other end of the resistor R11 is connected between the positive electrode of the operational amplifier A1 and a resistor R8. Wherein: r8=r9=r10=r11. The circuit will control the voltage u c Conversion to control current i c The method comprises the following steps: i.e c ＝u c /R12。
Namely:
in this embodiment, as shown in fig. 1, the current output circuit includes a resistor R13 and an NPN tube Q3; the emitter of the NPN tube Q3 is connected with the negative electrode of the lithium battery, the base electrode of the NPN tube Q3 is connected between the resistor R12 and the positive electrode of the operational amplifier A2, the collector of the NPN tube Q3 is connected with one end of the resistor R13, and the other end of the resistor R13 is connected with the collector of the PNP tube Q2. The current output circuit pair i of the invention c Amplifying to obtain output current i o The method comprises the following steps: i.e o ＝βi c Beta is the Q3 amplification factor, and the size of beta can be determined by the dynamic performance index of the circuit.
The working principle of the unmanned aerial vehicle battery serial charge balance circuit is as follows: when V is E Less thanAt the time, TL431 is cut off between the cathode and the anode, OP1 is cut off, u c Is equal to zero, thereby controlling the current i c Equal to zero, so the shunt current i of Q3 o And the battery charging current is not split, and the battery is kept charged. When the battery voltage V E Is greater than->In the process, the cathode and the anode of TL431 are conducted, V E The greater>The higher the degree of conduction between the cathode and anode of TL431, u c1 The smaller the current flowing through the resistor R6 at the input side of the optocoupler OP1, the larger the voltage u at R7 c The larger the control current i obtained via the current control circuit c The larger the current is, the more the current is obtained through the amplification of Q3Stream i o The charging current of the battery E is split. From the above analysis, V E The greater>The current i is shunted o The larger the battery voltage is, the battery charging current is reduced, and the battery voltage is maintained
In conclusion, the invention can realize the charge balance of the unmanned aerial vehicle battery, effectively prolong the service life of the battery, and has the advantages of simple structure, good practicability and the like.
Claims (1)
1. An unmanned aerial vehicle battery serial charge balance circuit, its characterized in that: the circuit comprises an activation circuit, a voltage control circuit, a current control circuit and a current output circuit; the activation circuit is connected with the anode and the cathode of the battery; the activation circuit is respectively connected with the voltage control circuit, the current control circuit and the current output circuit; the output end of the voltage control circuit is connected with the current control circuit, and the output end of the current control circuit is connected with the current output circuit; the voltage control circuit, the voltage control circuit and the current output circuit are also respectively connected with the cathode of the battery;
the activation circuit monitors whether the charging voltage of the unmanned aerial vehicle battery reaches the rated voltage in real time, and if the charging voltage reaches the rated voltage, the voltage control circuit connected with the unmanned aerial vehicle battery starts working; the voltage control circuit obtains a difference value between the battery voltage and the maximum charging voltage and obtains a control voltage; the current control circuit converts the control voltage obtained by the voltage control circuit into control current; the current output circuit amplifies the control current, regulates and controls the actual charging current of the battery, stabilizes the charging voltage of the unmanned aerial vehicle battery at the maximum charging voltage, and further realizes balance control of serial charging of the unmanned aerial vehicle battery;
the activation circuit comprises a voltage stabilizing diode Z1, a resistor R2, an NPN tube Q1 and a PNP tube Q2; the cathode of the voltage stabilizing diode Z1 and the emitter of the PNP tube Q2 are connected with the anode of the battery together; the anode of the voltage stabilizing diode Z1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the base electrode of an NPN tube Q1, the emitter electrode of the NPN tube Q1 is connected with the cathode of a battery, the collector electrode of the NPN tube Q1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the base electrode of a PNP tube Q2, and the collector electrode of the PNP tube Q2 is connected with a voltage control circuit, a current control circuit and a current output circuit;
the voltage control circuit comprises a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a controllable precise voltage stabilizing source TL431 and an optical coupler OP1; one end of the resistor R3 is connected with the collector of the PNP tube Q2, the other end of the resistor R3 is connected with one end of the resistor R4, and the other end of the resistor R4 is connected with the negative electrode of the battery; the input end of the controllable precise voltage stabilizing source TL431 is connected between the resistor R3 and the resistor R4, and the anode of the controllable precise voltage stabilizing source TL431 is connected with the cathode of the battery; one end of the resistor R5 is connected between the resistor R3 and the resistor R4, the other end of the resistor R5 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the cathode of the controllable precise voltage stabilizing source TL431 together with the cathode of the light emitting diode of the optical coupler OP1, the anode of the light emitting diode of the optical coupler OP1 is connected with one end of the resistor R6, and the other end of the resistor R6 is connected with the collector of the PNP tube Q2; the C electrode of the optical coupler OP1 is connected with the collector electrode of the PNP tube Q2, and the E electrode of the optical coupler OP1 is connected with one end of the resistor R7 and the current control circuit; the other end of the resistor R7 is connected with the negative electrode of the battery;
the current control circuit comprises a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an operational amplifier A1 and an operational amplifier A2; the negative electrode of the operational amplifier A1 is connected with one end of a resistor R9, and the other end of the resistor R9 is grounded; the positive electrode of the operational amplifier A1 is connected with one end of a resistor R8, and the other end of the resistor R8 is connected between the E electrode of the optical coupler OP1 and a resistor R7; the output end of the operational amplifier A1 is connected with one end of a resistor R12, and the other end of the resistor R12 is connected with the anode of the operational amplifier A2 and a current output circuit; one end of the resistor R10 is connected between the negative electrode of the operational amplifier A1 and the resistor R9, and the other end of the resistor R10 is connected between the output end of the operational amplifier A1 and the resistor R12; the negative electrode and the output end of the operational amplifier A2 are connected with one end of a resistor R11 together, and the other end of the resistor R11 is connected between the positive electrode of the operational amplifier A1 and a resistor R8;
the current output circuit comprises a resistor R13 and an NPN tube Q3; the emitter of the NPN tube Q3 is connected with the negative electrode of the lithium battery, the base electrode of the NPN tube Q3 is connected between the resistor R12 and the positive electrode of the operational amplifier A2, the collector of the NPN tube Q3 is connected with one end of the resistor R13, and the other end of the resistor R13 is connected with the collector of the PNP tube Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310351083.8A CN116461387B (en) | 2023-04-04 | 2023-04-04 | Unmanned aerial vehicle battery serial connection charge balance circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310351083.8A CN116461387B (en) | 2023-04-04 | 2023-04-04 | Unmanned aerial vehicle battery serial connection charge balance circuit |
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| Publication Number | Publication Date |
|---|---|
| CN116461387A CN116461387A (en) | 2023-07-21 |
| CN116461387B true CN116461387B (en) | 2023-10-24 |
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| CN202310351083.8A Active CN116461387B (en) | 2023-04-04 | 2023-04-04 | Unmanned aerial vehicle battery serial connection charge balance circuit |
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| CN2888719Y (en) * | 2006-01-09 | 2007-04-11 | 周海 | Battery-charging balancing circuit |
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| CN116461387A (en) | 2023-07-21 |
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