CN102004227B - High power battery detection circuit of electric vehicle - Google Patents
High power battery detection circuit of electric vehicle Download PDFInfo
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- CN102004227B CN102004227B CN2010105305281A CN201010530528A CN102004227B CN 102004227 B CN102004227 B CN 102004227B CN 2010105305281 A CN2010105305281 A CN 2010105305281A CN 201010530528 A CN201010530528 A CN 201010530528A CN 102004227 B CN102004227 B CN 102004227B
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Abstract
The invention relates to a high power battery detection circuit of an electric vehicle. The current detection system can not fully satisfy the demands on cost and reliability. The battery detection circuit comprises a current signal processing module, a voltage signal processing module, a power module, a reference voltage module, an A/D conversion module and a differential treatment module. A current signal to be detected is input in the current signal processing module, the output end of the current signal processing module is connected with one output end of the A/D conversion module; a voltage signal to be detected is input in the voltage signal processing module, the output end of the voltage signal processing module is connected with the other output end of the A/D conversion module; and the output ends of the A/D conversion module are connected with the input end of the differential treatment module, and the output end of the differential treatment module is used as the output end of the circuit. The circuit of the invention has high precision and anti-interference capability, wide applicable scope and low cost.
Description
Technical field
The invention belongs to the signal detection technique field, relate to a kind of electric automobile high power battery testing circuit.
Background technology
Along with becoming increasingly conspicuous of problems such as the energy, environmental protection, electric automobile more and more receives people's attention with advantages such as its zero-emission, energy utilization rate are high, the energy is diversified, simple in structure and easy to use, and becomes the developing direction of contemporary automobile gradually.
Accumulator system is the core ingredient of electric automobile, however electrokinetic cell at " energy than ", in serviceable life, the problem of aspect existence such as stability and production cost never is well solved, this has restricted the development of electric automobile to a great extent.But along with the appearance of some novel energy storage cells, succeeding in developing of lithium ion battery especially, the performance of battery is greatly improved.Except the performance that improves battery itself, battery is effectively managed the gordian technique that has become electric automobile.Good battery management system can provide monitoring and protection to battery, makes electric automobile performance best performance, postpones electronic serviceable life as far as possible simultaneously.Since the complicacy and the singularity of the used electrokinetic cell of electric automobile, the battery management system of electric automobile by independent proposition as research object.
A complete battery management system mainly possesses functions such as battery data detection, condition monitoring and safety management.Wherein the battery data detection is again a most basic link in the battery management system, and it is most important for total system accurately and in real time to detect battery basic parameters such as electric current, voltage.The voltage and current of battery can directly be detected, but these measurement data need corresponding processing to be used by system, and this whole need of work is accomplished by a special testing circuit.Current, occurred relevant detection system on the market, but can't meet the demands fully aspect cost and the reliability, develop a kind of low cost, high precision, jamproof high-powered automobiles battery testing system and just become very urgently.
Summary of the invention
The present invention is directed to the deficiency of prior art, a kind of electric automobile high power battery testing circuit is provided.
The technical scheme that technical solution problem of the present invention is taked is: this circuit comprises current signal processing module, voltage signal processing module, power module, reference voltage module, A/D modular converter and difference processing module.
Current signal to be checked inputs to current signal processing module, an input end of the output termination A/D modular converter of current signal processing module; Voltage signal to be checked inputs to the voltage signal processing module, another input end of the output termination A/D modular converter of voltage signal processing module; The input end of the output termination difference processing module of A/D modular converter, the output terminal of difference processing module is as the output terminal of this circuit.
Described power module is respectively current signal processing module, voltage signal processing module, reference voltage module, A/D modular converter and difference processing module power supply is provided, and described reference voltage module provides reference voltage for the voltage signal processing module.
Described current signal processing module comprises first resistance R 15, second resistance R 16, the 3rd resistance R 17, the 4th resistance R 18, the 5th resistance R 20, the 6th resistance R 21, the 7th resistance R 22, the 8th resistance R 23, the 9th resistance R 30, the tenth resistance R 63, first capacitor C 13, second capacitor C 9, the 3rd capacitor C 10, the 4th capacitor C 11, the 5th capacitor C 12, adjustable resistance R19, the first triode D4 and the first operational amplifier U3B.One end of first resistance R 15 and one termination of second resistance R 16+5V power supply; One end of the other end of first resistance R 15, first capacitor C 13, the 5th resistance R 20 connect an end of the 3rd resistance R 17; One end of another termination the 4th resistance R 18 of the 3rd resistance R 17, the other end ground connection of the other end of the 4th resistance R 18, first capacitor C 13; Wherein the other end of the 3rd resistance R 17 is as the current signal input end to be checked of current signal processing module.
The end of one termination adjustable resistance R19 of the other end of second resistance R 16, the 6th resistance R 21, the equal ground connection of adjustable end of the other end of adjustable resistance R19 and this resistance.The positive input of one termination, the first operational amplifier U3B of one end of the other end of the 5th resistance R 20, the 3rd capacitor C 10, the 7th resistance R 22; The negative input of one termination, the first operational amplifier U3B of one end of one end of the other end of the 6th resistance R 21, second capacitor C 9, the 8th resistance R 23, the 4th capacitor C 11; The equal ground connection of the other end of the other end of the other end of second capacitor C 9, the 3rd capacitor C 10, the 7th resistance R 22; The output terminal of one termination, the first operational amplifier U3B of one end of the other end of the other end of the 8th resistance R 23, the 4th capacitor C 11, the 9th resistance R 30, the tenth resistance R 63; The other end ground connection of the 9th resistance R 30, the M utmost point of a termination first triode D4 of the other end of the tenth resistance R 63, the 5th capacitor C 12 and as the output terminal of current signal processing module; The other end ground connection of the 5th capacitor C 12, the N utmost point of the first triode D4 connects+the 5V power supply, and the P of the first triode D4 is extremely unsettled.
Said voltage signal processing module comprises the 11 resistance R 31; The 12 resistance R 32; The 13 resistance R 33; The 14 resistance R 34; The 15 resistance R 35; The 16 resistance R 40; The 17 resistance R 41; The 18 resistance R 42; The 19 resistance R 43; The 20 resistance R 44; The 21 resistance R 64; The 6th capacitor C 14; The 7th capacitor C 15; The 8th capacitor C 16; The 9th capacitor C 19; The tenth capacitor C 20; The 11 capacitor C 34; The second operational amplifier U2B; The 3rd operational amplifier U2A and the second triode D5.One end of the 11 resistance R 31 is the input end of the voltage signal to be checked of voltage signal processing module, the other end of an end of the 12 resistance R 32, a termination the 11 resistance R 31 of the 13 resistance R 33; The equal ground connection of one end of one end of the other end of the 12 resistance R 32, the 6th capacitor C 14, the 7th capacitor C 15; The positive input of another termination second operational amplifier U2B of the other end of the other end of the 13 resistance R 33, the 6th capacitor C 14, the 7th capacitor C 15; The negative input of one termination, the second operational amplifier U2B of one end of the 14 resistance R 34, the 8th capacitor C 16; The output terminal of one termination, the second operational amplifier U2B of one end of the other end of the other end of the 14 resistance R 34, the 8th capacitor C 16, the 15 resistance R 35, the 17 resistance R 41; The other end ground connection of the 15 resistance R 35.
The output terminal of one termination reference voltage module of the 16 resistance R 40; The positive input of one termination the 3rd operational amplifier U2A of one end of the other end of the 16 resistance R 40, the 9th capacitor C 19, the 18 resistance R 42; The negative input of one termination the 3rd operational amplifier U2A of one end of the other end of the 17 resistance R 41, the tenth capacitor C 20, the 19 resistance R 43; The equal ground connection of one end of the other end of the tenth capacitor C 20, the other end of the 19 resistance R 43, the 20 resistance R 44; The output terminal of the other end of the other end of the 9th capacitor C 19, the other end of the 18 resistance R 42, the 20 resistance R 44, a termination the 3rd operational amplifier U2A of the 21 resistance R 64; The M utmost point of one termination, the second triode D5 of the other end of the 21 resistance R 64, the 11 capacitor C 34 and as the output terminal of voltage signal processing module; The other end ground connection of the 11 capacitor C 34; The N utmost point of the second triode D5 connects+the 5V power supply, and the P of the second triode D5 is extremely unsettled.
Said power module comprises to be provided+first power module of 15V power supply, provide+5V and+the second source module of 4V power supply.
First power module comprises the 22 resistance R the 4, the 23 resistance R the 5, the 24 resistance R the 6, the 12 capacitor C the 1, the 13 capacitor C the 2, the 14 capacitor C the 3, the 15 capacitor C the 4, the 16 capacitor C 5, the 3rd triode Q4, the 4th triode Q5, the first stabilivolt D1, the first voltage stabilizer VR1.One end of the 22 resistance R 4 is the input end of first power module, connects high power battery, the collector of a termination the 3rd triode Q4 of the other end of the 22 resistance R 4, the 23 resistance R 5; The base stage of one termination the 3rd triode Q4 of the other end of the 23 resistance R 5, the 24 resistance R 6; The emitter of the 3rd triode Q4 connects the collector of the 4th triode Q5; The base stage of another termination the 4th triode Q5 of the 24 resistance R 6, the input end of a termination voltage stabilizer VR1 of the negative terminal of the emitter of the 4th triode Q5, the first stabilivolt D1, an end of the 12 capacitor C 1, the 13 capacitor C 2; The other end of the anode of the first stabilivolt D1, the other end of the 12 capacitor C 1, the 13 capacitor C 2, the equal ground connection of earth terminal of the first voltage stabilizer VR1; The output terminal of the positive termination first voltage stabilizer VR1 of one end of the 14 capacitor C 3, an end of the 15 capacitor C 4, the 16 capacitor C 5 and as the output terminal of first power module, output+15V power supply; The equal ground connection of negative terminal of the other end of the 14 capacitor C 3, the other end of the 15 capacitor C 4, the 16 C5 electric capacity.
The second source module comprises the 25 resistance R the 12, the 26 resistance R the 13, the 27 resistance R the 14, the 17 capacitor C the 6, the 18 capacitor C the 7, the 19 capacitor C 8, the second voltage stabilizer VR2.The output terminal of input termination first power module of one end of the 17 capacitor C 6, the second voltage stabilizer VR2, and as the input end of second source module; One end of the earth terminal of the other end of the 17 capacitor C 6, the second voltage stabilizer VR2, the 18 capacitor C 7, the equal ground connection of an end of the 26 resistance R 13; The output terminal of one termination, the second voltage stabilizer VR2 of the other end of the 18 capacitor C 7, the 25 resistance R 12 and as the second source module+the 5V voltage output end; One end of one termination the 19 capacitor C 8 of the other end of the 25 resistance R 12, the 27 resistance R 14 and as the second source module+the 4V voltage output end; The other end of another termination the 27 resistance R 14 of the 26 resistance R 13; The other end ground connection of the 19 capacitor C 8.
Said reference voltage module comprises the 28 resistance R the 55, the 29 resistance R the 56, the 30 resistance R the 57, the 31 resistance R the 58, the 32 resistance R the 59, the 33 resistance R the 60, the 34 resistance R the 61, the 35 resistance R the 62, the 20 capacitor C the 28, the 21 capacitor C the 29, the 22 capacitor C the 30, the 23 capacitor C 31, four-operational amplifier U2C, the 5th operational amplifier U2D.One termination second source module of one end of the 29 resistance R 56, an end of the 30 resistance R 57, the 31 resistance R 58+the 4V voltage output end, and as the input end of voltage reference block; The negative input of one end of the 20 capacitor C 28, a termination four-operational amplifier U2C of the 28 resistance R 55; The positive input of one termination four-operational amplifier of the other end of the 29 resistance R 56, the 21 capacitor C 29, the other end ground connection of the 21 capacitor C 29; The output terminal of one termination four-operational amplifier U2C of the other end of the 20 capacitor C 28, the other end of the 28 resistance R 55, the 34 resistance R 61; The other end of the 34 resistance R 61 is the reference voltage module output terminal when adopting the 48V high power battery.
One termination the 5th operational amplifier U2D positive input of the other end of the 30 resistance R 57, the other end of the 31 resistance R 58, the 22 capacitor C 30; The equal ground connection of one end of the other end of the 22 capacitor C 30, the 32 resistance R 59; The negative input of one termination the 5th operational amplifier U2D of one end of the other end of the 32 resistance R 59, the 33 resistance R 60, the 23 capacitor C 31; The output terminal of one termination the 5th operational amplifier of the other end of the 33 resistance R 60, the other end of the 23 capacitor C 31, the 35 resistance R 62; The other end of the 35 resistance R 62 is the reference voltage module output terminal when adopting the 96V high power battery.
Said A/D modular converter comprises the 36 resistance R the 49, the 24 capacitor C 21, A/D conversion chip U1.One termination of the 24 capacitor C 21+5V power supply, the 1st pin of a termination A/D conversion chip U1 of the other end of the 24 capacitor C 21, the 36 resistance R 49; The 3rd pin of A/D conversion chip U1 is the output terminal of A/D modular converter; The 10th pin ground connection of A/D conversion chip U1; The 20th pin of A/D conversion chip U1 connects+the 5V voltage source; The 13rd pin of A/D conversion chip U1 connects the output terminal of voltage signal processing module, and the 12nd pin of A/D conversion chip U1 connects the output terminal of current signal processing module.Described A/D conversion chip U1 model is STC12C5604AD.
Described difference processing module comprises the 37 resistance R the 50, the 38 resistance R the 51, the 39 resistance R the 52, the 40 resistance R the 53, the 41 resistance R the 54, the 25 capacitor C 27, the 5th triode D2, the 6th triode D3, the 6th operational amplifier U3C, the 7th operational amplifier U3D.One termination of the 37 resistance R 50+5V voltage source, the M utmost point of an end of the other end of the 37 resistance R 50, the 25 capacitor C 27, an end of the 38 resistance R 51, the 5th triode D2, the M utmost point of the 6th triode D3, the negative input of the 7th operational amplifier U3D connect the positive input of the 6th operational amplifier U3C; The equal ground connection of the other end of the other end of the 38 resistance R 51, the 25 capacitor C 27; The output terminal of one termination A/D modular converter of the 39 resistance R 52, and as the signal input part of difference processing module; The N utmost point of the P utmost point of the N utmost point of the P utmost point of the other end of the 39 resistance R 52, the 5th triode D2, the 5th triode D2, the 6th triode D3, the 6th triode D3, the positive input of the 7th operational amplifier U3D connect the negative input of the 6th operational amplifier U3C; One end of output termination the 40 resistance R 53 of the 6th operational amplifier U3C, the other end of the 40 resistance R 53 is first signal output part of difference processing module; Output termination the 41 resistance R 54 1 ends of the 7th operational amplifier U3D, the other end of the 40 resistance R 54 is the secondary signal output terminal of difference processing module.
The present invention has following beneficial effect with respect to prior art: circuit precision of the present invention is high, and antijamming capability is strong, and is applied widely, and cost is low.High precision is meant and has adopted 10 A/D converter, and adopts differential amplifier circuit and comparator circuit respectively electric current and voltage signal to be handled.The anti-interference signal that has adopted after difference channel is changed A/D that is meant is handled, and has increased the transmitting range of signal.This circuit can be suitable for the detection of 48V and these two kinds of high power batteries commonly used of 96V, and the scope of application is wider.This circuit has used the very high ripe device of some cost performances, reduces cost of products greatly.
Description of drawings
Fig. 1 is an electrical block diagram of the present invention;
Fig. 2 is the current signal processing module circuit diagram;
Fig. 3 is a voltage signal processing module circuit diagram;
Fig. 4 is the first power module circuitry figure;
Fig. 5 is the second source module circuit diagram;
Fig. 6 is the reference voltage module circuit diagram;
Fig. 7 is an A/D conversion module circuit diagram;
Fig. 8 is the difference processing module circuit diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
As shown in Figure 1, electric automobile high power battery testing circuit comprises current signal processing module, voltage signal processing module, power module, reference voltage module, A/D modular converter and difference processing module.
Current signal to be checked inputs to current signal processing module, an input end of the output termination A/D modular converter of current signal processing module; Voltage signal to be checked inputs to the voltage signal processing module, another input end of the output termination A/D modular converter of voltage signal processing module; The input end of the output termination difference processing module of A/D modular converter, the output terminal of difference processing module is as the output terminal of this circuit.
As shown in Figure 2, current signal processing module comprises first resistance R 15, second resistance R 16, the 3rd resistance R 17, the 4th resistance R 18, the 5th resistance R 20, the 6th resistance R 21, the 7th resistance R 22, the 8th resistance R 23, the 9th resistance R 30, the tenth resistance R 63, first capacitor C 13, second capacitor C 9, the 3rd capacitor C 10, the 4th capacitor C 11, the 5th capacitor C 12, adjustable resistance R19, the first triode D4 and the first operational amplifier U3B.One end of first resistance R 15 and one termination of second resistance R 16+5V power supply; One end of the other end of first resistance R 15, first capacitor C 13, the 5th resistance R 20 connect an end of the 3rd resistance R 17; One end of another termination the 4th resistance R 18 of the 3rd resistance R 17, the other end ground connection of the other end of the 4th resistance R 18, first capacitor C 13; Wherein the other end of the 3rd resistance R 17 is as the current signal input end to be checked of current signal processing module;
The end of one termination adjustable resistance R19 of the other end of second resistance R 16, the 6th resistance R 21, the equal ground connection of adjustable end of the other end of adjustable resistance R19 and this resistance.The positive input of one termination, the first operational amplifier U3B of one end of the other end of the 5th resistance R 20, the 3rd capacitor C 10, the 7th resistance R 22; The negative input of one termination, the first operational amplifier U3B of one end of one end of the other end of the 6th resistance R 21, second capacitor C 9, the 8th resistance R 23, the 4th capacitor C 11; The equal ground connection of the other end of the other end of the other end of second capacitor C 9, the 3rd capacitor C 10, the 7th resistance R 22; The output terminal of one termination, the first operational amplifier U3B of one end of the other end of the other end of the 8th resistance R 23, the 4th capacitor C 11, the 9th resistance R 30, the tenth resistance R 63; The other end ground connection of the 9th resistance R 30, the M utmost point of a termination first triode D4 of the other end of the tenth resistance R 63, the 5th capacitor C 12 and as the output terminal of current signal processing module; The other end ground connection of the 5th capacitor C 12, the N utmost point of the first triode D4 connects+the 5V power supply, and the P of the first triode D4 is extremely unsettled.
The signal that gets into this testing circuit be electric current through the shunt processed voltage signal, this signal demand just can carry out subsequent treatment after advancing to amplify, and had adopted differential amplifier circuit as shown in Figure 2 here.VI is the input signal of current signal processing module among the figure, and size is 0～75mV, is first resistance R, 15 dividing potential drops of 2K through resistance, and being input as of difference mode signal: VI (R15/ (R15+R17))=0.5VI, its size is 0～37.5mV.In order to suppress common-mode signal as far as possible, circuit has adopted an adjustable resistance R19 that size is 5K, for reduce one order inertia introduced the size for the 9th resistance R 30 of 2K and through the first triode D4 circuit is protected.This circuit can carry out 137.5 times amplification, and the maximum voltage value of output is 5156mV.
As shown in Figure 3, the voltage signal processing module comprises the 11 resistance R the 31, the 12 resistance R the 32, the 13 resistance R the 33, the 14 resistance R the 34, the 15 resistance R the 35, the 16 resistance R the 40, the 17 resistance R the 41, the 18 resistance R the 42, the 19 resistance R the 43, the 20 resistance R the 44, the 21 resistance R 64, the 6th capacitor C 14, the 7th capacitor C 15, the 8th capacitor C 16, the 9th capacitor C 19, the tenth capacitor C the 20, the 11 capacitor C 34, the second operational amplifier U2B, the 3rd operational amplifier U2A and the second triode D5.One end of the 11 resistance R 31 is the input end of the voltage signal to be checked of voltage signal processing module, the other end of an end of the 12 resistance R 32, a termination the 11 resistance R 31 of the 13 resistance R 33; The equal ground connection of one end of one end of the other end of the 12 resistance R 32, the 6th capacitor C 14, the 7th capacitor C 15; The positive input of another termination second operational amplifier U2B of the other end of the other end of the 13 resistance R 33, the 6th capacitor C 14, the 7th capacitor C 15; The negative input of one termination, the second operational amplifier U2B of one end of the 14 resistance R 34, the 8th capacitor C 16; The output terminal of one termination, the second operational amplifier U2B of one end of the other end of the other end of the 14 resistance R 34, the 8th capacitor C 16, the 15 resistance R 35, the 17 resistance R 41; The other end ground connection of the 15 resistance R 35.
The output terminal of one termination reference voltage module of the 16 resistance R 40; The positive input of one termination the 3rd operational amplifier U2A of one end of the other end of the 16 resistance R 40, the 9th capacitor C 19, the 18 resistance R 42; The negative input of one termination the 3rd operational amplifier U2A of one end of the other end of the 17 resistance R 41, the tenth capacitor C 20, the 19 resistance R 43; The equal ground connection of one end of the other end of the tenth capacitor C 20, the other end of the 19 resistance R 43, the 20 resistance R 44; The output terminal of the other end of the other end of the 9th capacitor C 19, the other end of the 18 resistance R 42, the 20 resistance R 44, a termination the 3rd operational amplifier U2A of the 21 resistance R 64; The M utmost point of one termination, the second triode D5 of the other end of the 21 resistance R 64, the 11 capacitor C 34 and as the output terminal of voltage signal processing module; The other end ground connection of the 11 capacitor C 34; The N utmost point of the second triode D5 connects+the 5V power supply, and the P of the second triode D5 is extremely unsettled.
For this voltage signal processing module, the voltage signal of input is the voltage of high power battery, and normal magnitude of voltage is 44V～55V.In order to improve accuracy of detection, it is that the 11 resistance of 110K and the 12 resistance that resistance is 11K carry out dividing potential drop to input signal that circuit shown in Figure 3 has adopted resistance, obtains the voltage signal that size is 4～5V.This signal compares with reference voltage Vref after through the voltage follower of being made up of the second operational amplifier U2B, the 14 resistance R 34 and the 8th capacitor C 16, produces the voltage that size is 0～1V.This voltage signal carries out 5 times amplification through the 3rd operational amplifier U2A of back, and obtaining magnitude of voltage is the output signal of 0～5V.The second triode D5 among the figure plays the circuit protection effect equally, prevents the too high damage circuit of output voltage.
Power module comprises to be provided+first power module of 15V power supply, provide+5V and+the second source module of 4V power supply.
As shown in Figure 4, first power module comprises the 22 resistance R the 4, the 23 resistance R the 5, the 24 resistance R the 6, the 12 capacitor C the 1, the 13 capacitor C the 2, the 14 capacitor C the 3, the 15 capacitor C the 4, the 16 capacitor C 5, the 3rd triode Q4, the 4th triode Q5, the first stabilivolt D1, the first voltage stabilizer VR1.One end of the 22 resistance R 4 is the input end of first power module, connects high power battery, the collector of a termination the 3rd triode Q4 of the other end of the 22 resistance R 4, the 23 resistance R 5; The base stage of one termination the 3rd triode Q4 of the other end of the 23 resistance R 5, the 24 resistance R 6; The emitter of the 3rd triode Q4 connects the collector of the 4th triode Q5; The base stage of another termination the 4th triode Q5 of the 24 resistance R 6, the input end of a termination voltage stabilizer VR1 of the negative terminal of the emitter of the 4th triode Q5, the first stabilivolt D1, an end of the 12 capacitor C 1, the 13 capacitor C 2; The other end of the anode of the first stabilivolt D1, the other end of the 12 capacitor C 1, the 13 capacitor C 2, the equal ground connection of earth terminal of the first voltage stabilizer VR1; The output terminal of the positive termination first voltage stabilizer VR1 of one end of the 14 capacitor C 3, an end of the 15 capacitor C 4, the 16 capacitor C 5 and as the output terminal of first power module, output+15V power supply; The equal ground connection of negative terminal of the other end of the 14 capacitor C 3, the other end of the 15 capacitor C 4, the 16 C5 electric capacity.
After the 22 resistance R 4 and the bleeder circuit formed by the 3rd triode Q4, the 4th triode Q5, the 23 resistance R 5 and the 24 resistance R 6 of input signal Vbat among Fig. 4 through 500R/3W, after importing the first voltage stabilizer VR1 after the first stabilivolt D1 voltage stabilizing, obtain stable+15V voltage again.The 22 resistance R 4 can reduce because of input voltage fluctuation to influence that circuit produced; The 3rd triode Q4 and the 4th triode Q5 not only can carry unnecessary voltage; Let the first stabilivolt D1 be operated in the safe voltage range, can also reduce the power consumption of circuit.
As shown in Figure 5, the second source module comprises the 25 resistance R the 12, the 26 resistance R the 13, the 27 resistance R the 14, the 17 capacitor C the 6, the 18 capacitor C the 7, the 19 capacitor C 8, the second voltage stabilizer VR2.The output terminal of input termination first power module of one end of the 17 capacitor C 6, the second voltage stabilizer VR2, and as the input end of second source module; One end of the earth terminal of the other end of the 17 capacitor C 6, the second voltage stabilizer VR2, the 18 capacitor C 7, the equal ground connection of an end of the 26 resistance R 13; The output terminal of one termination, the second voltage stabilizer VR2 of the other end of the 18 capacitor C 7, the 25 resistance R 12 and as the second source module+the 5V voltage output end; One end of one termination the 19 capacitor C 8 of the other end of the 25 resistance R 12, the 27 resistance R 14 and as the second source module+the 4V voltage output end; The other end of another termination the 27 resistance R 14 of the 26 resistance R 13; The other end ground connection of the 19 capacitor C 8.
First voltage source produces+and 15V voltage is directly as the input signal of second source module; Obtain+the output signal of 5V through the second voltage stabilizer VR2; Be that the 25 resistance R 12, the resistance of 1K is that the 26 resistance R 13 of 2K and voltage division processing that resistance is 2K the 27 resistance R 14 obtain+the output signal of 4V the reference voltage module use that supplies back through resistance again.
As shown in Figure 6, reference voltage module comprises the 28 resistance R the 55, the 29 resistance R the 56, the 30 resistance R the 57, the 31 resistance R the 58, the 32 resistance R the 59, the 33 resistance R the 60, the 34 resistance R the 61, the 35 resistance R the 62, the 20 capacitor C the 28, the 21 capacitor C the 29, the 22 capacitor C the 30, the 23 capacitor C 31, four-operational amplifier U2C, the 5th operational amplifier U2D.One termination second source module of one end of the 29 resistance R 56, an end of the 30 resistance R 57, the 31 resistance R 58+the 4V voltage output end, and as the input end of voltage reference block; The negative input of one end of the 20 capacitor C 28, a termination four-operational amplifier U2C of the 28 resistance R 55; The positive input of one termination four-operational amplifier U2C of the other end of the 29 resistance R 56, the 21 capacitor C 29, the other end ground connection of the 21 capacitor C 29; The output terminal of one termination four-operational amplifier U2C of the other end of the 20 capacitor C 28, the other end of the 28 resistance R 55, the 34 resistance R 61; The other end of the 34 resistance R 61 is the reference voltage module output terminal when adopting the 48V high power battery.
One termination the 5th operational amplifier U2D positive input of the other end of the 30 resistance R 57, the other end of the 31 resistance R 58, the 22 capacitor C 30; The equal ground connection of one end of the other end of the 22 capacitor C 30, the 32 resistance R 59; The negative input of one termination the 5th operational amplifier U2D of one end of the other end of the 32 resistance R 59, the 33 resistance R 60, the 23 capacitor C 31; The output terminal of one termination the 5th operational amplifier U2D of the other end of the 33 resistance R 60, the other end of the 23 capacitor C 31, the 35 resistance R 62; The other end of the 35 resistance R 62 is the reference voltage module output terminal when adopting the 96V high power battery.
In order to detect two kinds of high power batteries of 48V commonly used and 96V, reference voltage module has adopted the circuit design like Fig. 6.The first half is suitable for the detection of 48V battery, and the latter half is suitable for the detection of 96V battery.For the first half, input+4V voltage is to become+the 4V reference voltage after 0 the 34 resistance R 61 through the voltage follower be made up of the 20 capacitor C the 28, the 28 resistance R the 55, the 29 resistance R the 56, the 21 capacitor C 29 and four-operational amplifier U2C and resistance.For the latter half ,+4V voltage through 2 times of amplifications of the 5th amplifier U2D after the reference voltage of output+8V.
As shown in Figure 7, the A/D modular converter comprises the 36 resistance R the 49, the 24 capacitor C 21, A/D conversion chip U1.One termination of the 24 capacitor C 21+5V power supply, the 1st pin of a termination A/D conversion chip U1 of the other end of the 24 capacitor C 21, the 36 resistance R 49 provides Restart Signal for the A/D conversion chip when start; The 3rd pin of A/D conversion chip U1 is the output terminal of A/D modular converter; The 10th pin ground connection of A/D conversion chip U1; The 20th pin of A/D conversion chip U1 connects+the 5V voltage source; The 13rd pin of A/D conversion chip U1 connects the output terminal of voltage signal processing module, and the 12nd pin of A/D conversion chip U1 connects the output terminal of current signal processing module.Described A/D conversion chip U1 model is STC12C5604AD.A/D conversion chip U1 provides 10 A/D, and precision can reach 1/1000, and this has improved signal detection accuracy greatly.
As shown in Figure 8, the difference processing module comprises the 37 resistance R the 50, the 38 resistance R the 51, the 39 resistance R the 52, the 40 resistance R the 53, the 41 resistance R the 54, the 25 capacitor C 27, the 5th triode D2, the 6th triode D3, the 6th operational amplifier U3C, the 7th operational amplifier U3D.One termination of the 37 resistance R 50+5V voltage source, the M utmost point of an end of the other end of the 37 resistance R 50, the 25 capacitor C 27, an end of the 38 resistance R 51, the 5th triode D2, the M utmost point of the 6th triode D3, the negative input of the 7th operational amplifier U3D connect the positive input of the 6th operational amplifier U3C; The equal ground connection of the other end of the other end of the 38 resistance R 51, the 25 capacitor C 27; The output terminal of one termination A/D modular converter of the 39 resistance R 52, and as the signal input part of difference processing module; The N utmost point of the P utmost point of the N utmost point of the P utmost point of the other end of the 39 resistance R 52, the 5th triode D2, the 5th triode D2, the 6th triode D3, the 6th triode D3, the positive input of the 7th operational amplifier U3D connect the negative input of the 6th operational amplifier U3C; One end of output termination the 40 resistance R 53 of the 6th operational amplifier U3C, the other end of the 40 resistance R 53 is first signal output part of difference processing module; Output termination the 41 resistance R 54 1 ends of the 7th operational amplifier U3D, the other end of the 40 resistance R 54 is the secondary signal output terminal of difference processing module.
Shown in Figure 8,1 end of P3 and 2 ends are respectively first signal and secondary signal output terminal.When the input end of difference block was high level, 1 end of P3 was a low level, and 2 ends of P3 are high level; When input end was low level, 1 end of P3 was a high level, and 2 ends of P3 are low level.Signal after the process difference processing has stronger antijamming capability and can adapt to the transmission of longer distance.
The concrete course of work of this circuit is: the electric power source pair of module cell voltage carries out transformation and voltage stabilizing to be handled, for other modules of circuit provide power supply; The current processing module is obtained the voltage signal that characterizes current value, carries out processing and amplifying, and the input of the signal after will handling A/D modular converter carries out the A/D sampling; Voltage module obtains the magnitude of voltage of battery, carries out voltage division processing, carries out sampling processing again with from being input to the A/D modular converter after the reference voltage comparison of reference voltage module and the suitable amplification; After will handling from the input signal of A/D modular converter, the difference processing module obtains the output signal of this battery detection circuit.
Claims (1)
1. electric automobile high power battery testing circuit comprises current signal processing module, voltage signal processing module, power module, reference voltage module, A/D modular converter and difference processing module, it is characterized in that:
Current signal to be checked inputs to current signal processing module, an input end of the output termination A/D modular converter of current signal processing module; Voltage signal to be checked inputs to the voltage signal processing module, another input end of the output termination A/D modular converter of voltage signal processing module; The input end of the output termination difference processing module of A/D modular converter, the output terminal of difference processing module is as the output terminal of this circuit;
Described power module is respectively current signal processing module, voltage signal processing module, reference voltage module, A/D modular converter and difference processing module power supply is provided, and described reference voltage module provides reference voltage for the voltage signal processing module;
Described current signal processing module comprises first resistance R 15, second resistance R 16, the 3rd resistance R 17, the 4th resistance R 18, the 5th resistance R 20, the 6th resistance R 21, the 7th resistance R 22, the 8th resistance R 23, the 9th resistance R 30, the tenth resistance R 63, first capacitor C 13, second capacitor C 9, the 3rd capacitor C 10, the 4th capacitor C 11, the 5th capacitor C 12, adjustable resistance R19, the first triode D4 and the first operational amplifier U3B; One end of first resistance R 15 and one termination of second resistance R 16+5V power supply; One end of the other end of first resistance R 15, first capacitor C 13, the 5th resistance R 20 connect an end of the 3rd resistance R 17; One end of another termination the 4th resistance R 18 of the 3rd resistance R 17, the other end ground connection of the other end of the 4th resistance R 18, first capacitor C 13; Wherein the other end of the 3rd resistance R 17 is as the current signal input end to be checked of current signal processing module;
The end of one termination adjustable resistance R19 of the other end of second resistance R 16, the 6th resistance R 21, the equal ground connection of adjustable end of the other end of adjustable resistance R19 and this resistance; The positive input of one termination, the first operational amplifier U3B of one end of the other end of the 5th resistance R 20, the 3rd capacitor C 10, the 7th resistance R 22; The negative input of one termination, the first operational amplifier U3B of one end of one end of the other end of the 6th resistance R 21, second capacitor C 9, the 8th resistance R 23, the 4th capacitor C 11; The equal ground connection of the other end of the other end of the other end of second capacitor C 9, the 3rd capacitor C 10, the 7th resistance R 22; The output terminal of one termination, the first operational amplifier U3B of one end of the other end of the other end of the 8th resistance R 23, the 4th capacitor C 11, the 9th resistance R 30, the tenth resistance R 63; The other end ground connection of the 9th resistance R 30, the M utmost point of a termination first triode D4 of the other end of the tenth resistance R 63, the 5th capacitor C 12 and as the output terminal of current signal processing module; The other end ground connection of the 5th capacitor C 12, the N utmost point of the first triode D4 connects+the 5V power supply, and the P of the first triode D4 is extremely unsettled;
Said voltage signal processing module comprises the 11 resistance R 31; The 12 resistance R 32; The 13 resistance R 33; The 14 resistance R 34; The 15 resistance R 35; The 16 resistance R 40; The 17 resistance R 41; The 18 resistance R 42; The 19 resistance R 43; The 20 resistance R 44; The 21 resistance R 64; The 6th capacitor C 14; The 7th capacitor C 15; The 8th capacitor C 16; The 9th capacitor C 19; The tenth capacitor C 20; The 11 capacitor C 34; The second operational amplifier U2B; The 3rd operational amplifier U2A and the second triode D5; One end of the 11 resistance R 31 is the input end of the voltage signal to be checked of voltage signal processing module, the other end of an end of the 12 resistance R 32, a termination the 11 resistance R 31 of the 13 resistance R 33; The equal ground connection of one end of one end of the other end of the 12 resistance R 32, the 6th capacitor C 14, the 7th capacitor C 15; The positive input of another termination second operational amplifier U2B of the other end of the other end of the 13 resistance R 33, the 6th capacitor C 14, the 7th capacitor C 15; The negative input of one termination, the second operational amplifier U2B of one end of the 14 resistance R 34, the 8th capacitor C 16; The output terminal of one termination, the second operational amplifier U2B of one end of the other end of the other end of the 14 resistance R 34, the 8th capacitor C 16, the 15 resistance R 35, the 17 resistance R 41; The other end ground connection of the 15 resistance R 35;
The output terminal of one termination reference voltage module of the 16 resistance R 40; The positive input of one termination the 3rd operational amplifier U2A of one end of the other end of the 16 resistance R 40, the 9th capacitor C 19, the 18 resistance R 42; The negative input of one termination the 3rd operational amplifier U2A of one end of the other end of the 17 resistance R 41, the tenth capacitor C 20, the 19 resistance R 43; The equal ground connection of one end of the other end of the tenth capacitor C 20, the other end of the 19 resistance R 43, the 20 resistance R 44; The output terminal of the other end of the other end of the 9th capacitor C 19, the other end of the 18 resistance R 42, the 20 resistance R 44, a termination the 3rd operational amplifier U2A of the 21 resistance R 64; The M utmost point of one termination, the second triode D5 of the other end of the 21 resistance R 64, the 11 capacitor C 34 and as the output terminal of voltage signal processing module; The other end ground connection of the 11 capacitor C 34; The N utmost point of the second triode D5 connects+the 5V power supply, and the P of the second triode D5 is extremely unsettled;
Said power module comprises to be provided+first power module of 15V power supply, provide+5V and+the second source module of 4V power supply;
First power module comprises the 22 resistance R the 4, the 23 resistance R the 5, the 24 resistance R the 6, the 12 capacitor C the 1, the 13 capacitor C the 2, the 14 capacitor C the 3, the 15 capacitor C the 4, the 16 capacitor C 5, the 3rd triode Q4, the 4th triode Q5, the first stabilivolt D1, the first voltage stabilizer VR1; One end of the 22 resistance R 4 is the input end of first power module, connects high power battery, the collector of a termination the 3rd triode Q4 of the other end of the 22 resistance R 4, the 23 resistance R 5; The base stage of one termination the 3rd triode Q4 of the other end of the 23 resistance R 5, the 24 resistance R 6; The emitter of the 3rd triode Q4 connects the collector of the 4th triode Q5; The base stage of another termination the 4th triode Q5 of the 24 resistance R 6, the input end of a termination voltage stabilizer VR1 of the negative terminal of the emitter of the 4th triode Q5, the first stabilivolt D1, an end of the 12 capacitor C 1, the 13 capacitor C 2; The other end of the anode of the first stabilivolt D1, the other end of the 12 capacitor C 1, the 13 capacitor C 2, the equal ground connection of earth terminal of the first voltage stabilizer VR1; The output terminal of the positive termination first voltage stabilizer VR1 of one end of the 14 capacitor C 3, an end of the 15 capacitor C 4, the 16 capacitor C 5 and as the output terminal of first power module, output+15V power supply; The equal ground connection of negative terminal of the other end of the 14 capacitor C 3, the other end of the 15 capacitor C 4, the 16 C5 electric capacity;
The second source module comprises the 25 resistance R the 12, the 26 resistance R the 13, the 27 resistance R the 14, the 17 capacitor C the 6, the 18 capacitor C the 7, the 19 capacitor C 8, the second voltage stabilizer VR2; The output terminal of input termination first power module of one end of the 17 capacitor C 6, the second voltage stabilizer VR2, and as the input end of second source module; One end of the earth terminal of the other end of the 17 capacitor C 6, the second voltage stabilizer VR2, the 18 capacitor C 7, the equal ground connection of an end of the 26 resistance R 13; The output terminal of one termination, the second voltage stabilizer VR2 of the other end of the 18 capacitor C 7, the 25 resistance R 12 and as the second source module+the 5V voltage output end; One end of one termination the 19 capacitor C 8 of the other end of the 25 resistance R 12, the 27 resistance R 14 and as the second source module+the 4V voltage output end; The other end of another termination the 27 resistance R 14 of the 26 resistance R 13; The other end ground connection of the 19 capacitor C 8;
Said reference voltage module comprises the 28 resistance R the 55, the 29 resistance R the 56, the 30 resistance R the 57, the 31 resistance R the 58, the 32 resistance R the 59, the 33 resistance R the 60, the 34 resistance R the 61, the 35 resistance R the 62, the 20 capacitor C the 28, the 21 capacitor C the 29, the 22 capacitor C the 30, the 23 capacitor C 31, four-operational amplifier U2C, the 5th operational amplifier U2D; One termination second source module of one end of the 29 resistance R 56, an end of the 30 resistance R 57, the 31 resistance R 58+the 4V voltage output end, and as the input end of voltage reference block; The negative input of one end of the 20 capacitor C 28, a termination four-operational amplifier U2C of the 28 resistance R 55; The positive input of one termination four-operational amplifier of the other end of the 29 resistance R 56, the 21 capacitor C 29, the other end ground connection of the 21 capacitor C 29; The output terminal of one termination four-operational amplifier U2C of the other end of the 20 capacitor C 28, the other end of the 28 resistance R 55, the 34 resistance R 61; The other end of the 34 resistance R 61 is the reference voltage module output terminal when adopting the 48V high power battery;
One termination the 5th operational amplifier U2D positive input of the other end of the 30 resistance R 57, the other end of the 31 resistance R 58, the 22 capacitor C 30; The equal ground connection of one end of the other end of the 22 capacitor C 30, the 32 resistance R 59; The negative input of one termination the 5th operational amplifier U2D of one end of the other end of the 32 resistance R 59, the 33 resistance R 60, the 23 capacitor C 31; The output terminal of one termination the 5th operational amplifier of the other end of the 33 resistance R 60, the other end of the 23 capacitor C 31, the 35 resistance R 62; The other end of the 35 resistance R 62 is the reference voltage module output terminal when adopting the 96V high power battery;
Described A/D modular converter comprises the 36 resistance R the 49, the 24 capacitor C 21, A/D conversion chip U1; One termination of the 24 capacitor C 21+5V power supply, the 1st pin of a termination A/D conversion chip U1 of the other end of the 24 capacitor C 21, the 36 resistance R 49; The 3rd pin of A/D conversion chip U1 is the output terminal of A/D modular converter; The 10th pin ground connection of A/D conversion chip U1; The 20th pin of A/D conversion chip U1 connects+the 5V voltage source; The 13rd pin of A/D conversion chip U1 connects the output terminal of voltage signal processing module, and the 12nd pin of A/D conversion chip U1 connects the output terminal of current signal processing module; Described A/D conversion chip U1 model is STC12C5604AD;
Described difference processing module comprises the 37 resistance R the 50, the 38 resistance R the 51, the 39 resistance R the 52, the 40 resistance R the 53, the 41 resistance R the 54, the 25 capacitor C 27, the 5th triode D2, the 6th triode D3, the 6th operational amplifier U3C, the 7th operational amplifier U3D; One termination of the 37 resistance R 50+5V voltage source, the M utmost point of an end of the other end of the 37 resistance R 50, the 25 capacitor C 27, an end of the 38 resistance R 51, the 5th triode D2, the M utmost point of the 6th triode D3, the negative input of the 7th operational amplifier U3D connect the positive input of the 6th operational amplifier U3C; The equal ground connection of the other end of the other end of the 38 resistance R 51, the 25 capacitor C 27; The output terminal of one termination A/D modular converter of the 39 resistance R 52, and as the signal input part of difference processing module; The N utmost point of the P utmost point of the N utmost point of the P utmost point of the other end of the 39 resistance R 52, the 5th triode D2, the 5th triode D2, the 6th triode D3, the 6th triode D3, the positive input of the 7th operational amplifier U3D connect the negative input of the 6th operational amplifier U3C; One end of output termination the 40 resistance R 53 of the 6th operational amplifier U3C, the other end of the 40 resistance R 53 is first signal output part of difference processing module; Output termination the 41 resistance R 54 1 ends of the 7th operational amplifier U3D, the other end of the 40 resistance R 54 is the secondary signal output terminal of difference processing module.
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| CN2010105305281A CN102004227B (en) | 2010-11-02 | 2010-11-02 | High power battery detection circuit of electric vehicle |
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| CN108445948B (en) * | 2018-06-20 | 2023-12-12 | 河南驰诚电气股份有限公司 | Automatic current calibrating device |
| CN112114270A (en) * | 2020-09-15 | 2020-12-22 | 中车大连电力牵引研发中心有限公司 | Monitoring reset circuit and monitoring method based on vehicle equipment power board |
| CN117607710B (en) * | 2024-01-24 | 2024-04-12 | 山东秦鲁能源科技有限公司 | New energy battery performance detection circuit |
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Owner name: JIANGSU JUBANG ENVIRONMENTAL ENGINEERING GROUP CO. Free format text: FORMER OWNER: HANGZHOU ELECTRONIC SCIENCE AND TECHNOLOGY UNIV Effective date: 20131023 |
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Effective date of registration: 20131023 Address after: 226600 Jiangsu city of Nantong province Haian County baiding town into the Industrial Park Patentee after: JIANGSU JUBANG ENVIRONMENT ENGINEERING GROUP CO., LTD. Address before: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park No. 2 street Patentee before: Hangzhou Electronic Science and Technology Univ |