CN112305445A - High-voltage charging detection circuit and equalization control protection system with same - Google Patents
High-voltage charging detection circuit and equalization control protection system with same Download PDFInfo
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- 238000007600 charging Methods 0.000 title claims abstract description 77
- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 238000004891 communication Methods 0.000 claims abstract description 25
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- 238000005070 sampling Methods 0.000 claims abstract description 23
- 230000006641 stabilisation Effects 0.000 claims abstract description 18
- 238000011105 stabilization Methods 0.000 claims abstract description 18
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000010280 constant potential charging Methods 0.000 claims abstract description 6
- 238000010277 constant-current charging Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 66
- 230000009977 dual effect Effects 0.000 claims description 14
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a high-voltage charging detection circuit and an equalization control protection system with the same, belonging to the field of high-voltage charging protection; a high voltage charge detection circuit comprising: the device comprises a sampling stabilization module, a power supply detection module and a collection isolation module; an equalization control protection system for a high voltage charge detection circuit, comprising: the device comprises a detection unit, an A/D conversion unit, a sub-equalization unit, a main control unit, an industrial personal computer and a communication unit; according to the invention, through detecting the output voltage of the charging pile, and comparing the voltage difference generated by the voltage between the collected battery units and the working rated voltage threshold value, whether the system is in an equalizing mode or not is carried out; meanwhile, in the equalizing mode, constant-current charging is carried out by using a charging pile, then constant-voltage charging is carried out, and the battery pack is rapidly charged; therefore, the consistency of the charging time of each battery monomer in the battery pack can be effectively ensured, and the damage and the safety to the battery performance are reduced.
Description
Technical Field
The invention discloses a high-voltage charging detection circuit and an equalization control protection system with the same, and belongs to the field of high-voltage charging protection.
Background
With the improvement of living standard of people, the automobile keeping quantity is continuously increased in recent years, and the problem of environmental pollution caused by the automobile keeping quantity is more and more serious. The electric automobile is an environment-friendly automobile capable of realizing zero emission, and is a trend of development of the automobile industry. At present, research and development efforts on electric vehicles are increased in many countries in the world. However, in addition to the development of electric vehicles, the development of charging facilities is also considered. As a 'gas station' of an electric automobile, the charging pile is put into use in many areas, however, the user experience of the charging pile is not satisfactory, and the fast-paced life makes the electric automobile user hard to endure long charging time.
In recent years, with the large-scale development of new energy electric vehicles, charging safety accidents occur, which cause serious economic losses to electric vehicle users, charging facility operators and the like and prevent the electric vehicles from being popularized rapidly; the safety protection performance of the charging equipment is a main influence factor of the safety of the charging process of the electric automobile. At present, the charging safety accidents of the electric automobile are frequently caused by imperfect safety protection measures in the charging process of the electric automobile, and the problem of charging safety is solved and is one of the key problems in the field of the electric automobile.
Airport working vehicle among the prior art also mostly converts the electric motor car into from burning the oil vehicle, is equipped with simultaneously and fills electric pile and carry out the charging of electric working vehicle, but airport electric motor car among the prior art fills electric pile when supplying power for the group battery, because can't stabilize the free voltage of battery in every group battery, thereby it is the same to lead to unable every battery monomer completion time that charges, thereby lead to taking place the battery and cross to charge and not full phenomenon, thereby lead to reducing the life-span and the performance of battery.
Disclosure of Invention
The purpose of the invention is as follows: the utility model provides a high voltage charge detection circuit, balanced control protection system who has this high voltage charge detection circuit to solve above-mentioned problem.
The technical scheme is as follows: a high voltage charge detection circuit comprising:
the sampling stabilization module is used for performing voltage detection stability and improving the stability and anti-interference performance of a detection signal;
the power supply detection module is used for detecting the voltage value of the charging voltage of the battery pack;
and the acquisition isolation module is used for isolating the acquisition signal from the output voltage so as to prevent telecommunication interference.
In one embodiment, the sample stabilization module includes: the circuit comprises a resistor R6, an adjustable resistor RV1, an amplifier U5, a double-D trigger U7A, an AND gate U8A, an interface J1, a capacitor C8 and a sampling holder U9;
In one embodiment, the power detection module includes: fuse FU1, resistor R3, resistor R4, capacitor C5, inductor L1, capacitor C4, battery B1, resistor R5, capacitor C6 and detector U4;
the positive electrode of the battery B1 is connected with one end of the fuse FU1, the negative electrode of the battery B1 is simultaneously connected with the No. 4 pin of the detector U4 and one end of the capacitor C6, the pin No. 1 of the detector U4 is connected with the pin No. 2 and simultaneously connected with one end of the resistor R4, one end of the capacitor C5, one end of the capacitor C4 and the other end of the fuse FU1, the other end of the capacitor C5 is connected to one end of the inductor L1 and one end of the resistor R3 at the same time, the other end of the resistor R3 is connected with the other end of the resistor R4, the No. 8 pin of the detector U4 is simultaneously connected with the other end of the capacitor C4 and the other end of the inductor L1, the No. 5 pin of the detector U4 is connected with one end of the resistor R5, the No. 6 pin of the detector U4 is connected with the No. 7 pin and outputs a signal, and the other end of the resistor R5 is connected with the other end of the capacitor C6 and outputs a signal.
In one embodiment, the acquisition isolation module comprises: a controllable voltage regulator source U2, a resistor R2, a resistor R1, a capacitor C3, a capacitor C2, a voltage regulator U3, a voltage regulator tube D2, a voltage regulator tube D1, a transformer TR1, a capacitor C1 and an isolator U1;
a pin 3 of the controllable regulator source U2 is connected with one end of the resistor R1 and inputs a signal, a pin 1 of the controllable regulator source U2 is connected with one end of the resistor R2 and is connected with a pin 3 of the controllable regulator source U2, a pin 2 of the regulator U3 is connected with the other end of the resistor R1 and one end of the capacitor C3 and inputs +5V voltage, the other end of the resistor R2 is connected with a pin 2 of the controllable regulator source U2 and the other end of the capacitor C3, a pin 1 of the regulator U3 is connected with the other end of the capacitor C3, one end of the capacitor C2 and a pin 6 of the transformer TR1, a pin 3 of the regulator U3 is connected with the other end of the capacitor C2, the negative pole of the regulator D2 and the negative pole of the regulator D1, a pin 2 of the transformer TR1 is connected with the positive pole of the regulator D2, no. 1 pin of the transformer TR1 is connected with the positive electrode of the voltage regulator tube D1, No. 3 pin of the transformer TR1 is connected with No. 8 pin of the isolator U1, No. 3 pin and No. 6 pin of the isolator U1 are connected with No. 4 pin of the transformer TR1 and one end of the capacitor C1, No. 2 pin and No. 7 pin of the isolator U1 are connected with the other end of the capacitor C1, No. 1 pin of the isolator U1 is connected with No. 5 pin of the transformer TR1, and No. 4 pin of the isolator U1 is grounded.
In one embodiment, the sample holder U9 is model LF398, the amplifier U5 is model LM311, the dual D flip-flop U7A is model 74LS74, and the and gate U8A is model 74LS 08; the model of the isolator U1 is MAX485, the model of the controllable voltage stabilizing source U2 is TL431, the model of the voltage stabilizer U3 is LD1117V12, and the model of the detector U4 is MAX 4081.
In one embodiment, the other end of the resistor R5 of the power detection module is connected with pin No. 3 of the controllable regulator U2 in the collection isolation module, and the resistor R5 outputs a reference voltage to the controllable regulator U2; the No. 6 pin and the No. 7 pin of the detector U4 of the power supply detection module are connected with the No. 2 pin of the amplifier U5 in the sampling stabilization module, and the No. 6 pin and the No. 7 pin of the detector U4 output sampling signals to the amplifier U5; pin 5 of the sample holder U9 in the sample stabilization module outputs a signal to AD conversion.
An equalization control protection system for a high voltage charge detection circuit, comprising: the device comprises a detection unit, an A/D conversion unit, a sub-equalization unit, a main control unit, an industrial personal computer and a communication unit; the detection unit comprises a sampling stabilization module, a power supply detection module and a collection isolation module; analog signals collected in the detection unit are transmitted to the A/D conversion unit to be converted into digital signals, meanwhile, the sub-equalization unit extracts the digital signals to obtain voltage differences among the battery pack monomers, and then the main control unit is used for controlling and realizing equalization control according to the voltage differences, so that the charging current flowing into each battery monomer by the charging pile is changed, the voltage differences among the battery pack monomers are reduced, and the unbalance among the battery pack monomers is correspondingly reduced; the master control unit can communicate the model and working voltage data of each rechargeable battery pack and rated charging voltage data with the industrial personal computer for transmission, and the model and working voltage data and the rated charging voltage data are stored and recorded in the industrial personal computer, so that the subsequent charging balance is ensured
In one embodiment, when the voltage difference between the battery pack single bodies is transmitted to the master control unit, the master control unit can communicate with the charging pile and the industrial personal computer; the method comprises the following specific steps:
step 11, confirming whether the functions are normally operated in the system work;
step 12, confirming whether a driving switch module of the master control unit operates or not;
step 13, confirming whether each sub-equalization module is started;
step 14, confirming the working stability of the detection unit and each internal working module;
step 15, confirming whether the communication unit establishes a communication channel between the master control unit and the industrial personal computer;
step 16, confirming whether the reset function can work normally;
step 21, the master control unit analyzes and processes data and judges whether the data is transmitted to an upper computer; comparing the voltage difference with a rated voltage difference according to the current voltage difference;
step 22, if the voltage difference at the moment accords with the threshold value of the rated voltage difference, data are not transmitted to the upper computer, and the next voltage detection is carried out;
step 23, if the voltage difference exceeds the threshold value of the rated voltage difference, transmitting the voltage difference to an upper computer, and starting a sub-equalization unit of the battery pack;
according to step 23, it can be further obtained that:
step 31, charging by a sampling constant current source charging method;
step 32, performing constant-current charging by using a charging pile, then performing constant-voltage charging, and rapidly charging the battery pack;
and step 33, collecting the voltage of each battery, sequencing the voltages, judging whether the maximum voltage value of the battery is greater than a set value, if so, charging by using the equalizing module, and automatically disconnecting the equalizing module after full charging.
In one embodiment, when the voltage difference of the battery pack exceeds the threshold value of the rated voltage difference, the communication unit establishes a communication channel to be connected with the industrial personal computer and transmits data to the industrial personal computer, so that mutual communication among the master control unit, the battery pack and the industrial personal computer is realized, and the industrial personal computer can judge whether to start the equalizing circuit to realize equalization; and the industrial control machine stores the maximum voltage value and the minimum voltage value among the battery pack monomers in the data into a memory; therefore, better voltage regulation is carried out when the battery pack is charged next time; meanwhile, when a plurality of data are communicated, the communication unit adopts multi-channel transmission to prevent signals from interfering with each other.
Has the advantages that: when the charging pile charges the electric vehicle, the charging voltage is detected, and whether the system starts an equalizing mode or not is carried out by comparing the voltage difference generated by the voltage between the collected battery units with the working rated voltage threshold value; meanwhile, in the equalizing mode, constant-current charging is carried out by using a charging pile, then constant-voltage charging is carried out, and the battery pack is rapidly charged; therefore, the charging current flowing into each battery cell by the charging pile is changed, so that the voltage difference among the battery pack cells is reduced, and the unbalance among the battery pack cells is correspondingly reduced; therefore, the consistency of the charging time of each battery monomer in the battery pack can be effectively ensured, and the damage and the safety to the battery performance are reduced.
Drawings
FIG. 1 is a system work flow diagram of the present invention.
Fig. 2 is a flow chart of the high voltage charge detection circuit of the present invention.
Fig. 3 is a high voltage charge detection circuit diagram of the present invention.
Fig. 4 is a power detection circuit diagram of the present invention.
Fig. 5 is a diagram of the acquisition isolation circuit of the present invention.
Fig. 6 is a sample stabilization circuit diagram of the present invention.
Fig. 7 is a graph of cell voltage of the battery cell of the present invention.
Detailed Description
As shown in fig. 1, in this embodiment, an equalization control protection system of a high-voltage charge detection circuit includes: the device comprises a detection unit, an A/D conversion unit, a sub-equalization unit, a master control unit, an industrial personal computer and a communication unit.
As shown in fig. 2, a high-voltage charge detection circuit includes: the device comprises a sampling stabilization module, a power supply detection module and a collection isolation module.
As shown in fig. 4, the power detection module includes: fuse FU1, resistor R3, resistor R4, capacitor C5, inductor L1, capacitor C4, battery B1, resistor R5, capacitor C6 and detector U4.
As shown in fig. 5, the collection isolation module includes: a controllable voltage regulator U2, a resistor R2, a resistor R1, a capacitor C3, a capacitor C2, a voltage regulator U3, a voltage regulator D2, a voltage regulator D1, a transformer TR1, a capacitor C1 and an isolator U1.
As shown in fig. 6, the sampling stabilization module includes: the circuit comprises a resistor R6, an adjustable resistor RV1, an amplifier U5, a double-D trigger U7A, an AND gate U8A, an interface J1, a capacitor C8 and a sampling holder U9.
As shown in fig. 3, the other end of the resistor R5 of the power detection module is connected to pin No. 3 of the controllable regulator U2 in the collection isolation module, and the resistor R5 outputs the reference voltage to the controllable regulator U2; the No. 6 pin and the No. 7 pin of the detector U4 of the power supply detection module are connected with the No. 2 pin of the amplifier U5 in the sampling stabilization module, and the No. 6 pin and the No. 7 pin of the detector U4 output sampling signals to the amplifier U5; pin 5 of the sample holder U9 in the sample stabilization module outputs a signal to AD conversion.
In a further embodiment, the pin No. 2 of the amplifier U5 is connected to the pin No. 2 of the sample holder U9 and inputs a signal, the pin No. 3 of the amplifier U5 is connected to one end of the resistor R6 and one end of the adjustable resistor RV1 at the same time, the control end of the adjustable resistor RV1 is connected to the other end and grounded, the pin No. 8 of the amplifier U5 is connected to the other end of the resistor R6 and inputs a voltage of +5V, the pin No. 4 of the amplifier U5 is input with a voltage of-5V, the pin No. 1 of the amplifier U5 is grounded, the pin No. 7 of the amplifier U5 is connected to the pin No. 3 of the dual D flip-flop U7A, the pin No. 2 of the dual D flip-flop U7A is connected to the pin No. 4 and inputs a voltage of +5V, the pin No. 1 of the dual D flip-flop U7A is connected to the pin No. 2 of the interface J1, the pin No. 5 of the dual D flip-flop U A is connected to the pin No. 1 of, the pin 2 of the and gate U8A is connected to the pin 1 of the interface J1, the pin 2 of the and gate U8A is connected to the pin 8 of the sample holder U9, the pin 7 of the sample holder U9 is grounded, the pins 3 and 6 of the sample holder U9 are connected to one end of the capacitor C8, the other end of the capacitor C8 is grounded, the pin 1 of the sample holder U9 inputs +5V voltage, the pin 4 of the sample holder U9 inputs- 5V voltage, and the pin 5 of the sample holder U9 outputs a signal.
In a further embodiment, the positive terminal of the battery B1 is connected to one end of the fuse FU1, the negative terminal of the battery B1 is connected to the pin 4 of the detector U4 and one end of the capacitor C6 at the same time, the pin 1 of the detector U4 is connected to the pin 2 and one end of the resistor R4, one end of the capacitor C5, one end of the capacitor C4 and the other end of the fuse FU1 at the same time, the other end of the capacitor C5 is connected to one end of the inductor L1 and one end of the resistor R3 at the same time, the other end of the resistor R3 is connected to the other end of the resistor R4, the pin 8 of the detector U4 is connected to the other end of the capacitor C4 and the other end of the inductor L1 at the same time, the pin 5 of the detector U4 is connected to one end of the resistor R5, the pin 6 of the detector U4 is connected to the pin 7 and outputs a signal, the other end of the resistor R5 is connected with the other end of the capacitor C6 and outputs a signal.
In a further embodiment, a pin 3 of the controllable regulator U2 is connected with one end of the resistor R1 and inputs a signal, a pin 1 of the controllable regulator U2 is connected with one end of the resistor R2 and is connected with a pin 3 of the controllable regulator U2, a pin 2 of the regulator U3 is simultaneously connected with the other end of the resistor R1 and one end of the capacitor C3 and inputs +5V voltage, the other end of the resistor R2 is simultaneously connected with a pin 2 of the controllable regulator U2 and the other end of the capacitor C3, a pin 1 of the regulator U3 is simultaneously connected with the other end of the capacitor C3, one end of the capacitor C2 and a pin 6 of the transformer TR1, a pin 3 of the regulator U3 is simultaneously connected with the other end of the capacitor C2, the negative electrode of the regulator D2 and the negative electrode of the regulator D1, and a pin 2 of the transformer TR1 is connected with the positive electrode 2 of the transformer TR 2, no. 1 pin of the transformer TR1 is connected with the positive electrode of the voltage regulator tube D1, No. 3 pin of the transformer TR1 is connected with No. 8 pin of the isolator U1, No. 3 pin and No. 6 pin of the isolator U1 are connected with No. 4 pin of the transformer TR1 and one end of the capacitor C1, No. 2 pin and No. 7 pin of the isolator U1 are connected with the other end of the capacitor C1, No. 1 pin of the isolator U1 is connected with No. 5 pin of the transformer TR1, and No. 4 pin of the isolator U1 is grounded.
An equalization control protection system for a high voltage charge detection circuit, comprising: the device comprises a detection unit, an A/D conversion unit, a sub-equalization unit, a main control unit, an industrial personal computer and a communication unit; the detection unit comprises a sampling stabilization module, a power supply detection module and a collection isolation module; analog signals collected in the detection unit are transmitted to the A/D conversion unit to be converted into digital signals, meanwhile, the sub-equalization unit extracts the digital signals to obtain voltage differences among the battery pack monomers, and then the main control unit is used for controlling and realizing equalization control according to the voltage differences, so that the charging current flowing into each battery monomer by the charging pile is changed, the voltage differences among the battery pack monomers are reduced, and the unbalance among the battery pack monomers is correspondingly reduced; the master control unit can communicate the model and working voltage data of each rechargeable battery pack and rated charging voltage data with the industrial personal computer for transmission, and the model and working voltage data and the rated charging voltage data are stored and recorded in the industrial personal computer, so that the subsequent charging balance is ensured
In one embodiment, when the voltage difference between the battery pack single bodies is transmitted to the master control unit, the master control unit can communicate with the charging pile and the industrial personal computer; the method comprises the following specific steps:
step 11, confirming whether the functions are normally operated in the system work;
step 12, confirming whether a driving switch module of the master control unit operates or not;
step 13, confirming whether each sub-equalization module is started;
step 14, confirming the working stability of the detection unit and each internal working module;
step 15, confirming whether the communication unit establishes a communication channel between the master control unit and the industrial personal computer;
step 16, confirming whether the reset function can work normally;
step 21, the master control unit analyzes and processes data and judges whether the data is transmitted to an upper computer; comparing the voltage difference with a rated voltage difference according to the current voltage difference;
step 22, if the voltage difference at the moment accords with the threshold value of the rated voltage difference, data are not transmitted to the upper computer, and the next voltage detection is carried out;
step 23, if the voltage difference exceeds the threshold value of the rated voltage difference, transmitting the voltage difference to an upper computer, and starting a sub-equalization unit of the battery pack;
according to step 23, it can be further obtained that:
step 31, charging by a sampling constant current source charging method;
step 32, performing constant-current charging by using a charging pile, then performing constant-voltage charging, and rapidly charging the battery pack;
and step 33, collecting the voltage of each battery, sequencing the voltages, judging whether the maximum voltage value of the battery is greater than a set value, if so, charging by using the equalizing module, and automatically disconnecting the equalizing module after full charging.
In one embodiment, when the voltage difference of the battery pack exceeds the threshold value of the rated voltage difference, the communication unit establishes a communication channel to be connected with the industrial personal computer and transmits data to the industrial personal computer, so that mutual communication among the master control unit, the battery pack and the industrial personal computer is realized, and the industrial personal computer can judge whether to start the equalizing circuit to realize equalization; and the industrial control machine stores the maximum voltage value and the minimum voltage value among the battery pack monomers in the data into a memory; therefore, better voltage regulation is carried out when the battery pack is charged next time; meanwhile, when a plurality of data are communicated, the communication unit adopts multi-channel transmission to prevent signals from interfering with each other.
The working principle is as follows: when charging is carried out, the charging pile outputs working voltage, the voltage is input into a battery, meanwhile, a high-voltage charging detection circuit also works, a power supply detection module works to detect the charging voltage input into a battery pack, and meanwhile, when a collection signal and the charging voltage work and are output mutually, the collection isolation module is used for carrying out electrical separation, so that interference among signals is prevented, meanwhile, an output signal is stably output to an A/D conversion unit through a sampling stabilization module, and before a master control unit receives data, system initialization is carried out firstly; confirming whether the functions of the system are normally operated in the working process; confirming whether a driving switch module of the master control unit operates or not; confirming whether each sub-equalization module is started; confirming the working stability of the detection unit and each internal working module; whether the communication unit establishes a communication channel between the master control unit and the industrial personal computer is determined; confirming whether the reset function can work normally; transmitting the voltage difference between the battery pack monomers to a master control unit; the master control unit analyzes and processes data and judges whether the data is transmitted to the upper computer; comparing the voltage difference with a rated voltage difference according to the current voltage difference; if the voltage difference at the moment accords with the threshold value of the rated voltage difference, data are not transmitted to the upper computer, and the next voltage detection is carried out; if the voltage difference exceeds the threshold value of the rated voltage difference, transmitting the voltage difference to an upper computer, and starting a sub-equalization unit of the battery pack; the sub-equalizing units of the battery pack work; charging by a sampling constant current source charging method; after constant-current charging is carried out by using a charging pile, constant-voltage charging is carried out, and the battery pack is rapidly charged; and collecting the voltage of each battery, sequencing the voltages, judging whether the maximum voltage value of the battery is greater than a set value, if so, charging by using the equalizing module, and automatically disconnecting the equalizing module after full charging.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (10)
1. A high voltage charge detection circuit, comprising:
the sampling stabilization module is used for performing voltage detection stability and improving the stability and anti-interference performance of a detection signal;
the power supply detection module is used for detecting the voltage value of the charging voltage of the battery pack;
and the acquisition isolation module is used for isolating the acquisition signal from the output voltage so as to prevent telecommunication interference.
2. The high-voltage charge detection circuit according to claim 1, wherein the sampling stabilization module comprises: the circuit comprises a resistor R6, an adjustable resistor RV1, an amplifier U5, a double-D trigger U7A, an AND gate U8A, an interface J1, a capacitor C8 and a sampling holder U9;
pin 2 of the amplifier U5 and pin 2 of the sample holder U9 are connected and input with a signal, pin 3 of the amplifier U5 is connected with one end of the resistor R6 and one end of the adjustable resistor RV1 at the same time, the control end of the adjustable resistor RV1 is connected with the other end and grounded, pin 8 of the amplifier U5 is connected with the other end of the resistor R6 and input with +5V voltage, pin 4 of the amplifier U5 is input with-5V voltage, pin 1 of the amplifier U5 is grounded, pin 7 of the amplifier U5 is connected with pin 3 of the dual D flip-flop U7A, pin 2 of the dual D flip-flop U7A is connected with pin 4 and input with +5V voltage, pin 1 of the dual D flip-flop U7A is connected with pin 2 of the interface J1, pin 5 of the dual D flip-flop U7A is connected with pin 1 of the and gate 8A, the pin 2 of the and gate U8A is connected to the pin 1 of the interface J1, the pin 2 of the and gate U8A is connected to the pin 8 of the sample holder U9, the pin 7 of the sample holder U9 is grounded, the pins 3 and 6 of the sample holder U9 are connected to one end of the capacitor C8, the other end of the capacitor C8 is grounded, the pin 1 of the sample holder U9 inputs +5V voltage, the pin 4 of the sample holder U9 inputs-5V voltage, and the pin 5 of the sample holder U9 outputs a signal.
3. The high-voltage charge detection circuit according to claim 1, wherein the power detection module comprises: fuse FU1, resistor R3, resistor R4, capacitor C5, inductor L1, capacitor C4, battery B1, resistor R5, capacitor C6 and detector U4;
the positive electrode of the battery B1 is connected with one end of the fuse FU1, the negative electrode of the battery B1 is simultaneously connected with the No. 4 pin of the detector U4 and one end of the capacitor C6, the pin No. 1 of the detector U4 is connected with the pin No. 2 and simultaneously connected with one end of the resistor R4, one end of the capacitor C5, one end of the capacitor C4 and the other end of the fuse FU1, the other end of the capacitor C5 is connected to one end of the inductor L1 and one end of the resistor R3 at the same time, the other end of the resistor R3 is connected with the other end of the resistor R4, the No. 8 pin of the detector U4 is simultaneously connected with the other end of the capacitor C4 and the other end of the inductor L1, the No. 5 pin of the detector U4 is connected with one end of the resistor R5, the No. 6 pin of the detector U4 is connected with the No. 7 pin and outputs a signal, and the other end of the resistor R5 is connected with the other end of the capacitor C6 and outputs a signal.
4. The high voltage charge detection circuit of claim 1, wherein said collection isolation module comprises: a controllable voltage regulator source U2, a resistor R2, a resistor R1, a capacitor C3, a capacitor C2, a voltage regulator U3, a voltage regulator tube D2, a voltage regulator tube D1, a transformer TR1, a capacitor C1 and an isolator U1;
a pin 3 of the controllable regulator source U2 is connected with one end of the resistor R1 and inputs a signal, a pin 1 of the controllable regulator source U2 is connected with one end of the resistor R2 and is connected with a pin 3 of the controllable regulator source U2, a pin 2 of the regulator U3 is connected with the other end of the resistor R1 and one end of the capacitor C3 and inputs +5V voltage, the other end of the resistor R2 is connected with a pin 2 of the controllable regulator source U2 and the other end of the capacitor C3, a pin 1 of the regulator U3 is connected with the other end of the capacitor C3, one end of the capacitor C2 and a pin 6 of the transformer TR1, a pin 3 of the regulator U3 is connected with the other end of the capacitor C2, the negative pole of the regulator D2 and the negative pole of the regulator D1, a pin 2 of the transformer TR1 is connected with the positive pole of the regulator D2, no. 1 pin of the transformer TR1 is connected with the positive electrode of the voltage regulator tube D1, No. 3 pin of the transformer TR1 is connected with No. 8 pin of the isolator U1, No. 3 pin and No. 6 pin of the isolator U1 are connected with No. 4 pin of the transformer TR1 and one end of the capacitor C1, No. 2 pin and No. 7 pin of the isolator U1 are connected with the other end of the capacitor C1, No. 1 pin of the isolator U1 is connected with No. 5 pin of the transformer TR1, and No. 4 pin of the isolator U1 is grounded.
5. The high-voltage charge detection circuit of claim 2, wherein the sample-and-hold circuit U9 is of type LF398, the amplifier U5 is of type LM311, the dual D flip-flop U7A is of type 74LS74, and the AND gate U8A is of type 74LS 08.
6. The high voltage charge detection circuit of claim 1, wherein the isolator U1 is of type MAX485, the controllable regulator U2 is of type TL431, the regulator U3 is of type LD1117V12, and the detector U4 is of type MAX 4081.
7. The high-voltage charge detection circuit according to claim 1, wherein the other end of the resistor R5 of the power detection module is connected with pin No. 3 of the controllable regulator U2 in the collection isolation module, and the resistor R5 outputs a reference voltage to the controllable regulator U2; the No. 6 pin and the No. 7 pin of the detector U4 of the power supply detection module are connected with the No. 2 pin of the amplifier U5 in the sampling stabilization module, and the No. 6 pin and the No. 7 pin of the detector U4 output sampling signals to the amplifier U5; pin 5 of the sample holder U9 in the sample stabilization module outputs a signal to AD conversion.
8. An equalization control protection system having the high-voltage charge detection circuit of any one of claims 1 to 7, comprising: the device comprises a detection unit, an A/D conversion unit, a sub-equalization unit, a main control unit, an industrial personal computer and a communication unit; the detection unit comprises a sampling stabilization module, a power supply detection module and a collection isolation module; analog signals collected in the detection unit are transmitted to the A/D conversion unit to be converted into digital signals, meanwhile, the sub-equalization unit extracts the digital signals to obtain voltage differences among the battery pack monomers, and then the main control unit is used for controlling and realizing equalization control according to the voltage differences, so that the charging current flowing into each battery monomer by the charging pile is changed, the voltage differences among the battery pack monomers are reduced, and the unbalance among the battery pack monomers is correspondingly reduced; and the master control unit can communicate and transmit the model and working voltage data of each rechargeable battery pack and rated charging voltage data with the industrial personal computer, and the model and working voltage data and the rated charging voltage data are stored and recorded in the industrial personal computer, so that the subsequent charging balance is ensured.
9. The balance control protection system of the high-voltage charging detection circuit according to claim 8, wherein when the voltage difference between each battery pack monomer is transmitted to the master control unit, the master control unit can communicate with the charging pile and the industrial personal computer; the method comprises the following specific steps:
step 1, before a master control unit receives data, firstly, initializing a system;
step 11, confirming whether the functions are normally operated in the system work;
step 12, confirming whether a driving switch module of the master control unit operates or not;
step 13, confirming whether each sub-equalization module is started;
step 14, confirming the working stability of the detection unit and each internal working module;
step 15, confirming whether the communication unit establishes a communication channel between the master control unit and the industrial personal computer;
step 16, confirming whether the reset function can work normally;
step 2, transmitting the voltage difference between the battery pack monomers to a master control unit;
step 21, the master control unit analyzes and processes data and judges whether the data is transmitted to an upper computer; comparing the voltage difference with a rated voltage difference according to the current voltage difference;
step 22, if the voltage difference at the moment accords with the threshold value of the rated voltage difference, data are not transmitted to the upper computer, and the next voltage detection is carried out;
step 23, if the voltage difference exceeds the threshold value of the rated voltage difference, transmitting the voltage difference to an upper computer, and starting a sub-equalization unit of the battery pack;
according to step 23, it can be further obtained that:
step 3, the sub-equalization units of the battery pack work;
step 31, charging by a sampling constant current source charging method;
step 32, performing constant-current charging by using a charging pile, then performing constant-voltage charging, and rapidly charging the battery pack;
and step 33, collecting the voltage of each battery, sequencing the voltages, judging whether the maximum voltage value of the battery is greater than a set value, if so, charging by using the equalizing module, and automatically disconnecting the equalizing module after full charging.
10. The balance control protection system of the high-voltage charging detection circuit according to claim 9, wherein when the voltage difference of the battery pack exceeds the threshold value of the rated voltage difference, the communication unit establishes a communication channel to be connected with the industrial personal computer and transmits data to the industrial personal computer, so that mutual communication among the master control unit, the battery pack and the industrial personal computer is realized, and the industrial personal computer can judge whether to start the balance circuit to realize balance; and the industrial control machine stores the maximum voltage value and the minimum voltage value among the battery pack monomers in the data into a memory; therefore, better voltage regulation is carried out when the battery pack is charged next time; meanwhile, when a plurality of data are communicated, the communication unit adopts multi-channel transmission to prevent signals from interfering with each other.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933697A (en) * | 2021-10-13 | 2022-01-14 | 广州小鹏汽车科技有限公司 | Diagnostic device, diagnostic method and vehicle |
| CN114006057A (en) * | 2021-10-22 | 2022-02-01 | 珠海格力电器股份有限公司 | Charging control method, charging control circuit and energy storage system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007006650A (en) * | 2005-06-24 | 2007-01-11 | Matsushita Electric Works Ltd | Charger and power tool set using same |
| CN101728852A (en) * | 2009-11-04 | 2010-06-09 | 秦永振 | Battery equilibrium charging and detecting and repairing device |
| CN102496993A (en) * | 2011-12-01 | 2012-06-13 | 江苏银佳企业集团有限公司 | Quick charging machine |
| CN103944228A (en) * | 2014-04-23 | 2014-07-23 | 华南师范大学 | Equalizing charging managing system and equalizing charging method of lithium ion power battery pack |
| CN104682523A (en) * | 2014-12-05 | 2015-06-03 | 华北科技学院 | Intelligent charger |
| CN105826972A (en) * | 2016-03-21 | 2016-08-03 | 江苏吾度新能源科技有限公司 | New energy electric vehicle rapid charging conversion management device |
| CN205608155U (en) * | 2016-01-19 | 2016-09-28 | 杭州义益钛迪信息技术有限公司 | Digital battery signal remote transmission's of multisection battery on -line measuring monitoring module |
| CN107221992A (en) * | 2017-07-27 | 2017-09-29 | 许文远 | A kind of charging and discharging control system |
| CN210128995U (en) * | 2018-08-21 | 2020-03-06 | 特瓦特能源科技有限公司 | Charging voltage acquisition circuit, charging fault diagnosis circuit and charging device |
-
2020
- 2020-09-28 CN CN202011041883.2A patent/CN112305445A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007006650A (en) * | 2005-06-24 | 2007-01-11 | Matsushita Electric Works Ltd | Charger and power tool set using same |
| CN101728852A (en) * | 2009-11-04 | 2010-06-09 | 秦永振 | Battery equilibrium charging and detecting and repairing device |
| CN102496993A (en) * | 2011-12-01 | 2012-06-13 | 江苏银佳企业集团有限公司 | Quick charging machine |
| CN103944228A (en) * | 2014-04-23 | 2014-07-23 | 华南师范大学 | Equalizing charging managing system and equalizing charging method of lithium ion power battery pack |
| CN104682523A (en) * | 2014-12-05 | 2015-06-03 | 华北科技学院 | Intelligent charger |
| CN205608155U (en) * | 2016-01-19 | 2016-09-28 | 杭州义益钛迪信息技术有限公司 | Digital battery signal remote transmission's of multisection battery on -line measuring monitoring module |
| CN105826972A (en) * | 2016-03-21 | 2016-08-03 | 江苏吾度新能源科技有限公司 | New energy electric vehicle rapid charging conversion management device |
| CN107221992A (en) * | 2017-07-27 | 2017-09-29 | 许文远 | A kind of charging and discharging control system |
| CN210128995U (en) * | 2018-08-21 | 2020-03-06 | 特瓦特能源科技有限公司 | Charging voltage acquisition circuit, charging fault diagnosis circuit and charging device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933697A (en) * | 2021-10-13 | 2022-01-14 | 广州小鹏汽车科技有限公司 | Diagnostic device, diagnostic method and vehicle |
| CN113933697B (en) * | 2021-10-13 | 2023-10-31 | 广州小鹏汽车科技有限公司 | Diagnostic device, diagnostic method and vehicle |
| CN114006057A (en) * | 2021-10-22 | 2022-02-01 | 珠海格力电器股份有限公司 | Charging control method, charging control circuit and energy storage system |
| CN114006057B (en) * | 2021-10-22 | 2024-03-26 | 珠海格力电器股份有限公司 | Charging control method, charging control circuit and energy storage system |
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