CN101917028B - Power battery pack detecting, evaluating and equalizing charge system and applying method thereof - Google Patents

Power battery pack detecting, evaluating and equalizing charge system and applying method thereof Download PDF

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Publication number
CN101917028B
CN101917028B CN 201010218926 CN201010218926A CN101917028B CN 101917028 B CN101917028 B CN 101917028B CN 201010218926 CN201010218926 CN 201010218926 CN 201010218926 A CN201010218926 A CN 201010218926A CN 101917028 B CN101917028 B CN 101917028B
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battery pack
voltage detecting
detecting
voltage
power battery
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CN101917028A (en
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谭晓军
刘海强
宗志坚
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Sun Yat Sen University
Institute of Dongguan of Sun Yat Sen University
National Sun Yat-sen University
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Institute of Dongguan of Sun Yat Sen University
National Sun Yat-sen University
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Abstract

The invention discloses a power battery pack detecting, evaluating and equalizing charge system and an applying method thereof. The power battery pack detecting, evaluating and equalizing charge system is characterized by comprising a battery pack detection part and an intelligent control part, wherein the battery pack detection part comprises a connector I and a plurality of voltage detection lines; the intelligent control part comprises a connector II, a plurality of voltage detecting and equalizing modules (1), a central controller, a current inducer (3), a control display panel (4), a load (5) and a charger (6); and the system is used for measuring voltage and temperature information of a power battery pack and measuring charge and discharge currents of the battery pack. The invention can be used for carrying out detecting, evaluating and equalizing charge on the power battery pack, helps a user know the current state of the power battery pack, improves the property of the power battery pack, and prolongs the service life.

Description

Power battery pack detecting, assessment and equalizing charge system and application process thereof
Technical field
The present invention relates to the charging device of battery pack, feature relates to power battery pack detecting, assessment and equalizing charge system and application process thereof.Belong to electrokinetic cell checkout equipment technical field.
Background technology
The type of electrokinetic cell comprises lithium ion battery, lead-acid battery and Ni-MH battery.Voltage is low, the shortcoming of little energy because single electrokinetic cell often exists; therefore; combined by a plurality of electrokinetic cells and to consist of power battery pack; be applied to just more and more widely the fields such as electric automobile, electric motor car, electric boat, electric robot and IT stand-by power supply, often can play energy savings, protection of the environment texts.
But power battery pack will run into two problems after using a period of time:
1, battery problem of inconsistency.Owing to the difference of chemical composition and some reasons in the use procedure, there is inconsistency in each battery aspect two of voltage and charged abilities in the power battery pack, and its bad result causes the hydraulic performance decline of whole battery pack and the charging interval is prolonged.Therefore, need in time find and reduce the inconsistency of battery.
2, cell degradation problem.Whether power battery pack is in use constantly aging, and the user need to understand the degree of aging of battery pack, and grasp and have the charged ability of individual cell to cross low or have potential safety hazard, in order in time change indivedual or all electrokinetic cells.
Summary of the invention
First purpose of the present invention is for a kind of power battery pack detecting, assessment and equalizing charge system are provided.This device can be applicable to battery status detection, equalizing charge, electric weight assessment and the safeguard protection of all kinds of power battery pack, comprises the power battery pack such as electric automobile, electric motor car, electric boat, electric robot and IT stand-by power supply.The type of electrokinetic cell can be lithium ion battery, lead-acid battery and Ni-MH battery.
Second purpose of the present invention is for the application process of a kind of power battery pack detecting, assessment and equalizing charge system is provided.
First purpose of the present invention can reach by taking following technical scheme:
Power battery pack detecting, assessment and equalizing charge system, its design feature is: comprise battery pack probe portion and intelligent control part, described battery pack probe portion comprises connector I, some voltage detecting lines, and described intelligent control part comprises connector II, several voltage detecting and balance module, central controller, current inductor, control display panel, load and charger; The I/O end of several voltage detecting and balance module is connected with connector respectively by electric wire; The I/O end of several voltage detecting and balance module is connected with central controller by communication bus respectively, central controller also has I/O to be connected with charger with connector II, current sensor, control display panel, load respectively, the positive pole of charger is connected with current sensor, current sensor is connected with connector II, and the negative pole of charger is connected with connector II; Finished assessment and the equalizing charge of power battery pack by described voltage detecting and balance module, central controller, current inductor, control display panel, load and charger.
First purpose of the present invention can reach by taking following technical scheme:
A kind of specific embodiments of the present invention is: the battery pack probe portion also comprises several temperature sensors, and the signal output part of described temperature sensor is connected with the input of connector I respectively.
A kind of specific embodiments of the present invention is: described voltage detecting line is connected to the two ends of each electrokinetic cell of the power battery pack that is made of N electrokinetic cell series connection in turn; Described connector I and connector II mate mutually, and connecting line between the two is corresponding one by one; One end of described charger is respectively by electronic switch T 1With electronic switch T 2With battery anode B 1Link to each other, the other end respectively with battery pack negative pole B N+1Link to each other described electronic switch T 1With electronic switch T 2Link to each other with central controller respectively; N 〉=1 wherein.
A kind of specific embodiments of the present invention is: connector I is provided with the connectivity port that is complementary and is connected with the battery pack probe portion; Have 10 connecting lines, wherein 3 is the temperature sensor bus, directly links to each other with central controller, and other 7 is voltage detecting line B 1, B 2... B 7, link to each other with several voltage detecting and balance module.
A kind of specific embodiments of the present invention is: central controller is formed by connecting by computer chip and peripheral electron element thereof, and the control display panel is made of liquid crystal display or is comprised of a computer with display screen.
Further scheme is: central controller is formed by connecting by Mega-64 computer chip and peripheral electron element thereof, and control display panel 8 is made of the liquid crystal display that includes 1 128 * 64 dot matrix.
A kind of specific embodiments of the present invention is: current sensor is made of the Hall instrument transformer, wherein detects index to be-100A~100A; Charger is 30V by output-index, and the adjustable D. C regulated of 30A consists of.
A kind of specific embodiments of the present invention is: voltage detecting and balance module comprise electric resistance partial pressure testing circuit, equalizing circuit, microcontroller and communication isolator; Microcontroller is made of the Mega-8 computer chip; Communication isolator is made of the HCPL2730 High-Speed Coupled Device; The electric resistance partial pressure testing circuit is made of the precision resistance network, is provided with several test points; Equalizing circuit comprises that several equalizing resistances reach one to one some electronic switches; The resistance of each equalizing resistance is 1 Ω, and electronic switch is the relay of 5V/3A, the control end C of relay 1, C 2And C 3Receive respectively the output port of microcontroller.
A kind of specific embodiments of the present invention is: several test points of electric resistance partial pressure testing circuit are D 1, D 2... D 6D wherein 1, D 2And D 3The voltage ratio of corresponding divider resistance is 1: 6; D 4, D 5And D 6The voltage ratio of corresponding divider resistance is 1: 3.
Second purpose of the present invention can reach by taking following technical scheme:
The application process of power battery pack detecting, assessment and equalizing charge system is characterized in that:
1) system is measured voltage, the temperature information of power battery pack, simultaneously the charge and discharge electric current of whole battery pack is implemented to measure, wherein, information of voltage is by be connected to the voltage detecting line B of each voltage detecting and balance module 4 from each electrokinetic cell two ends 1, B 2... B N+1Realize;
2) each voltage detecting and balance module are delivered to the A/D conversion port that microprocessor carries to the information of voltage of each battery respectively with microprocessor by voltage-dividing detection circuit; Current information is directly measured by a Hall element, the central controller of intelligent control part is directly received in the output of Hall element, the measurement of temperature information is as optional part, if temperature information need to be measured by system, can be furnished with temperature sensor, temperature sensor bus at the battery pack probe portion of system, to detect the temperature of power battery pack;
3) there is following relation in the quantity of the number of batteries of electrokinetic cell quantity, voltage detecting line quantity, each voltage detecting and balance module service and voltage detecting and balance module: first, the electrokinetic cell number is N, electrokinetic cell is connected successively, has N+1 bar voltage detecting line B 1, B 2... B N+1The second, the number of batteries of each voltage detecting and balance module service is m, and the quantity of voltage detecting and balance module is K, if m 〉=N, then K=1; Otherwise K 〉=2, in this case, first voltage detecting and balance module are served the 1st~m battery, corresponding to m+1 bar detection line B 1, B 2... B N+1), second voltage detecting and balance module are served the m+1~2m battery, corresponding to m+1 bar detection line (B M+1, B M+2... B 2m+1, so analogize ... last voltage detecting and balance module are served (K-1) m+1~N battery, corresponding to N-(K-1) m bar detection line B (K-1) m+1, B (K-1) m+2... B N+1
4) central controller and each voltage detecting and balance module are one to one or the relation of one-to-many, link to each other by communication bus between them, and communication bus can be I 2C bus, CAN bus or industrial bus; Because controller chip majority on the market is with I 2The C bus interface, therefore preferred I 2C communication bus, each voltage detecting and balance module needed before the access communications bus through communication isolating, in order that prevent the short circuit that causes because of the common ground problem of communicating by letter; Communication isolating preferred light coupled apparatus, for example the HCPL2730 chip of TI company;
5) the control display panel belongs to the part mutual with the operator, and relevant information and generating report forms that it is to show power battery pack on the one hand are to accept the operator on the other hand for the control of system, such as parameter setting, emergency cut-off etc.; The preferred PC computer with display screen of control display panel, this computer is connected with the central controller of system by serial communication port;
6) charger provides charge power supply, and charger is by an electronic switch T 2With battery anode B 1And battery pack negative pole B N+1Link to each other, the charging voltage of charger, the size of charging current can be set by hand by the operator, also can be by system's central controller adaptive setting, and its output voltage should be higher than the float charge voltage value of battery pack generally speaking; Electronic switch T 2Be subjected to central controller controls, preferred a kind of energy is also referred to as contactor, for example the G9EC-1 model relay of Omron Corp by the relay of large electric current;
7) load is by the assessment of discharge realization to power battery pack, and load is by an electronic switch T 1With battery anode B 1And battery pack negative pole B N+1Link to each other; Load should be able to be born the ceiling voltage of power battery pack, and its discharge power is preferably 1/5th to 1/3rd of the specified discharge power of battery pack.
Consider that many processor chips all carry the A/D conversion on the market, can directly gather the output of Hall element, so do not draw the A/D change-over circuit of measuring for current information in the legend.The measurement of temperature information is optional part, and this is because temperature information is very unimportant for quite a few electrokinetic cell, not necessarily needs to measure its working temperature.
In intelligent control part, the temperature sensor bus directly is connected with central controller.Temperature sensor can be selected the 18B20 device of DALLAS company, the preferred 1-wire bus of temperature sensor bus.
The reason that adds voltage-dividing detection circuit in each voltage detecting and balance module is that the range ability of the A/D conversion port that carries of microprocessor is generally less than battery or battery voltage, but the purpose of dividing potential drop is higher battery or battery voltage are converted to lower measuring voltage.Bleeder circuit can adopt precision resistance to carry out, and the resistance of precision resistance can be chosen according to the characteristic of battery number and microprocessor.
The present invention has following outstanding beneficial effect:
1, carry out the complex optimum computing by central controller the power battery pack state is detected, may there be the individual cell of hidden danger in discovery, and judges whether it needs to carry out equilibrium treatment.
2, can carry out equalizing charge and balanced discharge to power battery pack by central controller controls charger, equalizing charge module according to the battery pack state, avoid battery electric quantity unbalance, the operating time of improving the combination property of power battery pack and once charging.
3, can carry out the electric weight assessment to power battery pack according to battery pack state and power battery pack operating mode, help the user to understand degree of aging and the cycles left life-span of power battery pack.
4, can carry out the maltilevel security protection to battery pack according to electric current, voltage and temperature detection, avoid battery pack overcurrent, overvoltage, excess temperature, increase the service life, improve the safety and reliability of power battery pack.
5, charging is all power battery pack necessary links in use.The present invention can detect and assess power battery pack in passing before and after charging, and passes through the link of some equalizing charges, balanced discharge, reduces the inconsistency of battery, in time pinpoints the problems, and improves the service efficiency of battery pack.
Description of drawings
Fig. 1 is the circuit theory diagrams of a specific embodiment of the present invention.
Fig. 2 is the circuit theory diagrams of battery probe portion among Fig. 1.
Fig. 3 is the circuit theory diagrams of intelligent detecting part among Fig. 1.
Fig. 4 is the circuit theory diagrams of voltage detecting and balance module among Fig. 1.
Embodiment
For better understanding the present invention, the present invention will be further described below in conjunction with embodiment and accompanying drawing, but the scope of protection of present invention is not limited to the scope that embodiment represents.
Specific embodiment 1:
Fig. 1 to Fig. 4 consists of specific embodiments of the invention 1.
Referring to figs. 1 through Fig. 3, present embodiment comprises battery pack probe portion and intelligent control part, described battery pack probe portion comprises connector I, some voltage detecting lines, and described intelligent control part comprises connector II, several voltage detecting and balance module 1, central controller 2, current inductor 3, control display panel 4, load 5 and charger 6; The I/O end of several voltage detecting and balance module 1 is connected with connector II respectively by electric wire; The I/O end of several voltage detecting and balance module 1 is connected with central controller 2 by communication bus respectively, central controller 2 also has I/O to be connected with charger with connector II, current sensor 3, control display panel 4, load 5 respectively to be connected, the positive pole of charger 10 is connected with current sensor 3, current sensor 3 is connected with connector II, and the negative pole of charger 6 is connected with connector II; Finished assessment and the equalizing charge of power battery pack by described voltage detecting and balance module 1, central controller 2, current inductor 3, control display panel 4, load 5 and charger 6.
Present embodiment is used for the electric robot of a 6 lithium batteries.Power battery pack is in series by the ferric phosphate lithium cell of 6 80Ah in the robot, and the battery pack rated voltage is 19.8V, and rated capacity is 1.6KWh.
As shown in Figure 1 to Figure 3, in the ferric phosphate lithium cell of 6 80Ah of power battery pack detecting, assessment, equalizing charge system serial connection, the both positive and negative polarity of each battery links to each other with each electrode of electronic battery by the voltage detecting line, and 6 electrokinetic cells need 7 connecting lines altogether, are denoted as B 1, B 2..., B 7Adopt 6 temperature sensors 7, the sampled point of each transducer is close to the surface of each battery, and transducer is selected the 18B20 device of DALLAS company, this device adopts the 1-wire bus, bus is comprised of three wires, and wherein two connect the VDD-to-VSS line, and other one is data wire.Each temperature sensor 7 is connected in parallel on three buses by three wires.All voltage detecting line and temperature sensor buses all converge at connector I, so the connecting line on the connector I is 10.
The non-battery pack probe portion of power battery pack detecting, assessment, balanced charging device comprises connector II, voltage detecting and balance module 1, central controller 2, current inductor 3, control display panel 4, load 5 and charger 6; The I/O end of a plurality of voltage detecting and balance module 1 is connected with connector II respectively by electric wire; The I/O end of a plurality of voltage detecting and balance module 1 is connected with communication bus respectively.Communication bus is connected with central controller 2, central controller 2 is also respectively with connector II, current sensor 3, control display panel 4, load 5, charger 6 be connected, the positive and negative two ends of two termination chargers 6 of load 5, the positive pole of charger 6 is connected with current sensor 3, current sensor 3 is connected with connector II, and the negative pole of charger 6 is connected with connector II.Wherein, connector 2 is complementary with the battery pack probe portion.Have 10 connecting lines, wherein 3 is the temperature sensor bus, directly links to each other with central controller 2, and other 7 is voltage detecting line (B 1, B 2..., B 7), link to each other with voltage detecting and balance module 1.Central controller 2 is selected the Mega-64 chip of Atmel company, and control display panel 4 consists predominantly of the liquid crystal display of 1 128 * 64 dot matrix.
Current sensor 3 is selected the Hall instrument transformer, wherein detects index to be-100A~100A.Load 5 is formed in parallel by some heating electric-oven silks, and the resistance value after the parallel connection is 1 Ω.Charger 6 is that an output-index is 30V, the adjustable D. C regulated of 30A.
Voltage detecting and balance module 1 comprise electric resistance partial pressure testing circuit 1-1, equalizing circuit 1-2, microcontroller 1-3 and communication isolator 1-4 as shown in Figure 4.Wherein microcontroller 1-3 is the Mega-8 chip of Atmel company.Communication isolator 1-4 adopts the HCPL2730 High-Speed Coupled Device of TI company.Electric resistance partial pressure testing circuit 1-1 is made of the precision resistance network, and 6 battery correspondences 6 test point D 1, D 2..., D 6D wherein 1, D 2, D 3The voltage ratio of corresponding divider resistance is 1: 6.D 4, D 5, D 6The voltage ratio of corresponding divider resistance is 1: 3.
Equalizing circuit 1-2 among Fig. 4 comprises 6 equalizing resistances and corresponding 6 electronic switches.The resistance of each equalizing resistance is 1 Ω.Electronic switch is 5V, the relay of 3A, the control end C of relay 1, C 2, C 3Receive respectively the output port of microcontroller.
Specific embodiment 2:
Present embodiment is used for the oil electric mixed dynamic passenger vehicle of a 28 lead-acid batteries.
The power battery pack that present embodiment uses at hybrid power passenger car is in series by the lead-acid battery of 28 120Ah, and the battery pack rated voltage is 336V, and rated capacity is 40.3KWh.
Referring to figs. 1 through the circuit connection structure of Fig. 3, the voltage detecting line links to each other with each electrode of electronic battery, and 28 electrokinetic cells need 29 connecting lines altogether, are denoted as B 1, B 2..., B 29
Adopt 28 temperature sensors 7, the sampled point of each transducer is close to the surface in each point pond, and transducer is selected the 18B20 device of DALLAS company, this device adopts the 1-wire bus, bus is comprised of three wires, and wherein two connect the VDD-to-VSS line, and other one is data wire.All voltage detecting line and temperature sensor buses all converge at connector I, so the connecting line on the connector I is 32.
The non-battery pack probe portion of this embodiment comprises: 1 connector II, 5 voltage detecting and 1,1 central controller 2 of balance module, 4,1 loads 5 of 3,1 control display panels of 1 current inductor, 1 charger 6, and their control switch or connecting line.
Wherein, connector II and battery pack probe portion are complementary.Have 32 connecting lines, wherein 3 is the temperature sensor bus, directly links to each other with central controller 2, and other 29 is voltage detecting line (B 1, B 2..., B 29), link to each other with voltage detecting and balance module 1.Central controller 2 is selected the Mega-8 chip of Atmel company, and control display panel 4 is comprised of a PC computer with liquid crystal display, and this computer is connected by the RS-232 bus with the Mega-8 chip.
Battery sensor 3 is Hall instrument transformers, wherein detects index to be-100A~100A.Load 5 is formed in parallel by some heating electric-oven silks, and the resistance value after the parallel connection is 10 Ω.Charger 6 is that a maximum output-index is 400V, the D.C. regulated power supply of 20A.
Each voltage detecting and balance module 1 are as shown in Figure 4.Wherein microcontroller 1-3 is the Mega-8 chip of Atmel company.Communication isolator 1-4 adopts the HCPL2730 High-Speed Coupled Device of TI company.Electric resistance partial pressure testing circuit 1-1 is made of the precision resistance network.
Altogether 5 voltage detecting and balance module 1, each module is responsible at most 6 batteries.Wherein the 1st module is responsible for the 1st~6th battery, corresponding to voltage detecting line B 1, B 2..., B 7The 2nd module is responsible for the 7th~12nd battery, corresponding to voltage detecting line B 7, B 8..., B 13The 3rd module is responsible for the 13rd~18th battery, corresponding to voltage detecting line B 13, B 14..., B 19The 4th module is responsible for the 19th~24th battery, corresponding to voltage detecting line B 19, B 20..., B 25The 5th module is responsible for the 25th~28th battery, corresponding to voltage detecting line B 25, B 26..., B 29
Equalizing circuit 1-2 among Fig. 4 comprises 6 equalizing resistances and corresponding 6 electronic switches.The resistance of each equalizing resistance is 1 Ω.Electronic switch is 5V, the relay of 3A, the control end C of relay 1, C 2, C 3Receive respectively the output port of microcontroller 1-3.
Specific embodiment 3:
Present embodiment is used for the battery-operated motor cycle of a 4 lead-acid batteries.
The power battery pack of present embodiment on battery-operated motor cycle is in series by the lead-acid battery of 4 20Ah, and the battery pack rated voltage is 48V, and rated capacity is 800Wh.Substantially with embodiment 1, difference from Example 1 is its implementation detail: the battery pack probe portion does not need temperature sensor and temperature sensor bus, and 4 electrokinetic cells have 5 voltage detecting lines, so the connecting line on the connector is 5; The detection index of intelligent control part Hall instrument transformer is-20A~20A that the resistance value of load is 2 Ω.Charger is that an output-index is 60V, the adjustable D. C regulated of 20A.

Claims (10)

1. power battery pack detecting, assessment and equalizing charge system is characterized in that:
1) comprises battery pack probe portion and intelligent control part, described battery pack probe portion comprises connector I, some voltage detecting lines, and described intelligent control part comprises connector II, several voltage detecting and balance module (4), central controller (6), current inductor (7), control display panel (8), load (9) and charger (10); The I/O end of several voltage detecting and balance module (4) is connected with connector II respectively by electric wire; The I/O end of several voltage detecting and balance module (4) is connected with central controller (6) by communication bus (11) respectively, central controller (6) also is provided with I/O and is connected 10 with connector II, current sensor (7), control display panel (8), load (9) with charger respectively) be connected, the positive pole of charger (10) is connected with current sensor (7), current sensor (7) is connected with connector II, and the negative pole of charger (10) is connected with connector II; Finished assessment and the equalizing charge of power battery pack by described voltage detecting and balance module (4), central controller (6), current inductor (7), control display panel (8), load (9) and charger (10);
2) control display panel (8) is the part mutual with the operator, and relevant information and generating report forms that it is to show power battery pack on the one hand are to accept the operator on the other hand for the control of system, comprise parameter setting, emergency cut-off; The control display panel be one with the PC computer of display screen, this computer is connected with the central controller of system by serial communication port.
2. power battery pack detecting according to claim 1, assessment and equalizing charge system, it is characterized in that: the battery pack probe portion also comprises several temperature sensors, and the signal output part of described temperature sensor is connected with the input of connector I respectively.
3. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: there are following relation in the number of batteries of electrokinetic cell quantity, voltage detecting line quantity, each voltage detecting and balance module service and the quantity of voltage detecting and balance module: first, the electrokinetic cell number is N, electrokinetic cell is connected successively, has N+1 bar voltage detecting line B 1, B 2... B N+1The second, the number of batteries of each voltage detecting and balance module (4) service is m, and the quantity of voltage detecting and balance module (4) is K, K=1 or K 〉=2, in K 〉=2 o'clock, first voltage detecting and balance module (4) are served the 1st~m battery, corresponding to m+1 bar detection line B 1, B 2... B N+1), second voltage detecting and balance module are served the m+1~2m battery, corresponding to m+1 bar detection line B M+1, B M+2... B 2m+1, so analogize ... last voltage detecting and balance module are served (K-1) m+1~N battery, corresponding to N-(K-1) m bar detection line B (K-1) m+1, B (K-1) m+2... B N+1
4. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system is characterized in that: described voltage detecting line is connected to the two ends of each electrokinetic cell of the power battery pack that is made of N electrokinetic cell series connection in turn; Described connector I and connector II mate mutually, and connecting line between the two is corresponding one by one; One end of described charger (10) links to each other with battery anode (B1) by electronic switch T2, and electronic switch T1 is connected between battery anode (B1) and the load, the other end of described charger (10) and battery pack negative pole (B N+1) link to each other, described electronic switch T1 links to each other with central controller respectively with electronic switch T2; N 〉=1 wherein.
5. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: connector I is provided with the connectivity port that is complementary and is connected with the battery pack probe portion; Have 10 connecting lines, wherein 3 is the temperature sensor bus, directly links to each other with central controller, and other 7 is voltage detecting line B 1, B 2... B 7, link to each other with several voltage detecting and balance module (4).
6. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: central controller (6) is formed by connecting by computer chip and peripheral electron element thereof.
7. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: current sensor (7) is made of the Hall instrument transformer, wherein detects index and is-100A~100A; Charger (10) is 30V by output-index, and the adjustable D. C regulated of 30A consists of.
8. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: voltage detecting and balance module (4) comprise electric resistance partial pressure testing circuit (4-1), equalizing circuit (4-2), microcontroller (4-3) and communication isolation circuit (4-4); Microcontroller (4-3) is made of the Mega-8 computer chip; Communication isolation circuit is made of the HCPL2730 High-Speed Coupled Device; Electric resistance partial pressure testing circuit (4-1) is made of the precision resistance network, is provided with several test points; Equalizing circuit comprises that several equalizing resistances reach one to one some electronic switches; The resistance of each equalizing resistance is 1 Ω, and electronic switch is the relay of 5V/3A, the control end C of relay 1, C 2And C 3Receive respectively the output port of microcontroller (4-3).
9. power battery pack detecting according to claim 1 and 2, assessment and equalizing charge system, it is characterized in that: several test points of electric resistance partial pressure testing circuit (4-1) are D 1, D 2... D 6D wherein 1, D 2And D 3The voltage ratio of corresponding divider resistance is 1:6; D 4, D 5And D 6The voltage ratio of corresponding divider resistance is 1:3.
10. the application process of power battery pack detecting, assessment and equalizing charge system is characterized in that:
1) system is measured voltage, the temperature information of power battery pack, simultaneously the charge and discharge electric current of whole battery pack is implemented to measure, wherein, information of voltage is by be connected to the voltage detecting line B of each voltage detecting and balance module (4) from each electrokinetic cell two ends 1, B 2... B N+1Realize;
2) by the voltage-dividing detection circuit of voltage detecting and balance module (4) information of voltage of each battery is delivered to the A/D conversion port that microprocessor carries; Current information is directly measured by a Hall element, the central controller of intelligent control part is directly received in the output of Hall element, be furnished with temperature sensor, temperature sensor bus at the battery pack probe portion of system, to detect the temperature of power battery pack;
3) central controller of intelligent control part (6) consists of one to one or the relation of one-to-many with each voltage detecting and balance module 4, links to each other by communication bus between them, and communication bus is I 2C bus, CAN bus or industrial bus; Each voltage detecting and balance module (4) be the process communication isolating before the access communications bus;
4) control display panel (8) show power battery pack relevant information and generating report forms, accept the operator for the control of system; Control display panel (8) be one with the computer of display screen, this computer is connected with the central controller of system by serial communication port; Perhaps control display panel (8) is made of liquid crystal display, and this liquid crystal display makes control display panel (8) be connected with central controller with serial communication interface by described serial communication interface;
5) charger (10) provides charge power supply, and charger (10) is by an electronic switch (T 2) and battery anode (B 1) and battery pack negative pole (B N+1) link to each other, the charging voltage of charger (10), the size of charging current are set by hand by the operator, and perhaps by system's central controller adaptive setting, its output voltage should be higher than the float charge voltage value of battery pack generally speaking; Electronic switch (T 2) controlled by central controller (6);
6) load (9) is by the assessment of discharge realization to power battery pack, and load (9) links to each other with battery anode (B1) and battery pack negative pole (BN+1) by an electronic switch (T1); The discharge power of load (9) is preferably 1/5th to 1/3rd of the specified discharge power of battery pack.
CN 201010218926 2010-07-06 2010-07-06 Power battery pack detecting, evaluating and equalizing charge system and applying method thereof Expired - Fee Related CN101917028B (en)

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