CN101814754A - Power supply management system for lithium battery pack - Google Patents
Power supply management system for lithium battery pack Download PDFInfo
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- CN101814754A CN101814754A CN201010140237A CN201010140237A CN101814754A CN 101814754 A CN101814754 A CN 101814754A CN 201010140237 A CN201010140237 A CN 201010140237A CN 201010140237 A CN201010140237 A CN 201010140237A CN 101814754 A CN101814754 A CN 101814754A
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Abstract
The invention discloses a power supply management system for a lithium battery pack. The input end of a sampling module is connected with two ends of a lithium battery; a control module is provided with two control signal input ends; the output end of the sampling module is connected with the input end of a level processing circuit and connected with the input end of a singlechip through a magnetic isolation module; the output end of the level processing circuit is connected with one control signal input end of the control module; the output end of the singlechip is connected with the other control signal input end of the control module; the singlechip receives signals of an acquisition module, and controls a charge field tube and a discharge field tube through logic judgment; and meanwhile, the acquisition module controls the charge field tube and the discharge field tube through a driving control module, wherein when one path of control fails, the other path of control can ensure the control of the charge field tube and the discharge field tube so as to increase the stability of the system and improve the control precision.
Description
Technical field
The present invention relates to a kind of power supply management system for lithium battery pack.
Background technology
Present power supply management system for lithium battery pack, sample circuit be by gathering voltage, electric current and the temperature signal of lithium battery group, and after the signal that collects was delivered to single-chip microcomputer and judged, control lithium battery group was charged and discharged, and the lithium battery group is protected; But this management system; the stability of a system is poor; but the lithium battery group generally all is operated in the hot environment; error in data and data transmission fault appear in single-chip microcomputer easily under abominable working condition; when error in data or error of transmission appear in management system; can not charge and discharge prevention to the lithium battery group, cause the lithium battery group to damage easily.
Summary of the invention
The technical issues that need to address of the present invention are the stability that provides a kind of power supply management system for lithium battery pack to increase system, the purpose of better protection lithium battery group.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of power supply management system for lithium battery pack, comprise the lithium battery group that composes in series by at least two lithium batteries, sampling module, the magnetic isolation module, the level treatment circuit, single-chip microcomputer, control module, switching circuit, it is characterized in that: the input of described sampling module is connected with the two ends of lithium battery, described control module has two signal input end, the output of described sampling module is connected with the magnetic isolation module by the I2C bus with the level treatment circuit respectively, and the magnetic isolation module is connected with the input of single-chip microcomputer by the I2C bus, and the output of described level treatment circuit is connected with a signal input end of control module, the output of described single-chip microcomputer is connected with another signal input end of control module, the output of control module is connected with the input of switching circuit, and output one end of described switching circuit is connected with battery pack by sampling resistor R1, and the other end is connected with load;
Described sampling module is used to gather lithium battery two ends charge and discharge magnitude of voltage and sampling resistor R1 sampling end voltage, will overcharge, cross discharge signal and deliver to the level treatment circuit and by the I2C bus signal is delivered to the magnetic isolation module;
Described single-chip microcomputer is used for receiving by the I2C bus digital signal of the sampling module that the magnetic isolation module handled, and judges, and outputs signal to control module;
Described level treatment circuit is used to receive overshoot, the mistake discharge signal that sampling module sends, and outputs signal to control module;
Described control module is used for receiving the control signal of single-chip microcomputer output simultaneously and the control signal of level treatment circuit output is carried out logic determines, outputs signal to switching circuit;
Described switching circuit is used to receive the logical signal that control module is exported, and is switched on or switched off the charge and discharge loop.
Described level treatment circuit is made up of charging level treatment circuit and discharge level treatment circuit, described control module is made up of charge control module that all has two signal input end and discharge control module, the output of charging level treatment circuit and single-chip microcomputer is connected with the signal input end of charge control module respectively, and the output of described discharge level treatment circuit and single-chip microcomputer is connected with the signal input end of discharge control module respectively.
Described switching circuit is made up of putting field tube DEFT and filling field tube CEFT of series connection, the grid of putting field tube DEFT is connected with the output of discharge control module, source electrode is connected with sampling resistor, and the grid that fills field tube CEFT is connected with the output of charge control module, and source electrode is desired load and connected.
The chip model of described sampling module is OZ8920.
Described discharge level treatment circuit comprises triode Q1, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module 1 is connected with the base stage of triode Q1, the collector electrode of described triode Q1 is connected with the anode of light-emitting diode, the minus earth of described light-emitting diode, the collector electrode of described photodiode is connected with the anode of diode D11, the anode of diode is connected with working power by resistance, the grounded emitter of photodiode, the negative electrode of described diode D11 is connected with the input port of discharge control module, and described discharge level treatment circuit is controlled the discharge control module according to the order that sampling module sends.
Described charging level treatment circuit comprises triode Q2, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module is connected with the base stage of triode Q11, the collector electrode of described triode Q2 is connected with the negative electrode of light-emitting diode, the anode of described light-emitting diode connects power supply, the grounded emitter of triode Q2, the collector electrode of described photodiode is connected with the anode of diode D12, the anode of diode D12 is connected with the work Lianyuan by resistance, the grounded emitter of photodiode, the negative electrode of described diode D12 is connected with the input port of charge control module 6.Described discharge level treatment circuit 3 is controlled charge control module 6 according to the order that sampling module 1 sends.
Described control module is made up of two triodes, the base stage of described two triodes is respectively two inputs of control module, the emitter of two triodes connects back ground connection, and the collector electrode of two triodes connects the back is connected and is control module with working power output.
The present invention compared with prior art; adopted hardware circuit and software that dual control is carried out in the charging and the discharge of lithium battery group; Based Intelligent Control is carried out in charging and discharge to the lithium battery group; guaranteed that the lithium battery group can work under rugged environment; the stability and the reliability of system have been improved; protect the lithium battery group, improved the life-span of lithium battery group.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further details;
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is a control module circuit diagram among Fig. 1;
In Fig. 1,1, sampling module, 2, the discharge level treatment circuit, 3, the charging level treatment circuit, 4, single-chip microcomputer, 5, the discharge control module, 6, charge control module, 7, the magnetic isolation module.
Embodiment
Shown in Fig. 1-2, a kind of power supply management system for lithium battery pack, comprise the lithium battery group that composes in series by at least two joint lithium batteries, sampling module, the magnetic isolation module, the level treatment circuit, control module, switching circuit, the input of described sampling module is connected with the two ends of lithium battery, described control module has two signal input end, the output of described sampling module respectively with the input of level treatment circuit be connected with the input of single-chip microcomputer by the magnetic isolation module, the output of described level treatment circuit is connected with a signal input end of control module, the output of described single-chip microcomputer is connected with another signal input end of control module, the output of control module is connected with the input of switching circuit, output one end of described switching circuit is connected with battery pack by sampling resistor, and the other end is connected with load;
Described sampling module is used to gather lithium battery two ends charge and discharge magnitude of voltage and sampling resistor sampling end voltage, will overcharge, cross discharge signal and deliver to the level treatment circuit and deliver to single-chip microcomputer by the magnetic isolation module;
Described single-chip microcomputer is used for receiving by the I2C bus digital signal of the sampling module that the magnetic isolation module handled, and judges, and outputs signal to control module;
The level treatment circuit is used to receive overshoot, the mistake discharge signal that sampling module sends, and outputs signal to control module;
Described control module is used for receiving the control signal of single-chip microcomputer output simultaneously and the control signal of level treatment circuit output is carried out logic determines, outputs signal to switching circuit;
Described switching circuit is used to receive the logical signal that control module is exported, and is switched on or switched off the charge and discharge loop.
Described level treatment circuit is made up of charging level treatment circuit and discharge level treatment circuit, described control module is made up of charge control module and discharge control module, described control module is formed and is all had two signal input end by charge control module and discharge control module, the output of charging level treatment circuit and single-chip microcomputer is connected with the signal input end of charge control module respectively, and the output of described discharge level treatment circuit and single-chip microcomputer is connected with the signal input end of discharge control module respectively.
Described switching circuit is made up of putting field tube DEFT and filling field tube CEFT of series connection, the grid of putting field tube DEFT is connected with the output of discharge control module, source electrode is connected with sampling resistor, and the grid that fills field tube CEFT is connected with the output of charge control module, and source electrode is desired load and connected.
The chip model of described sampling module 1 is the OZ8920 of concavo-convex company.
Described discharge level treatment circuit 3 comprises triode Q1, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module 1 is connected with the base stage of triode Q1, the collector electrode of described triode Q1 is connected with the anode of light-emitting diode, the minus earth of described light-emitting diode, the collector electrode of described photodiode is connected with the anode of diode D11, the anode of diode is connected with working power by resistance, the grounded emitter of photodiode, the negative electrode of described diode D11 is connected with the input port of discharge control module 5, and described discharge level treatment circuit 2 is controlled discharge control module 5 according to the order that sampling module sends.
Described charging level treatment circuit comprises triode Q2, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module is connected with the base stage of triode Q2, the collector electrode of described triode Q2 is connected with the negative electrode of light-emitting diode, the anode of described light-emitting diode connects power supply, the grounded emitter of triode Q2, the collector electrode of described photodiode is connected with the anode of diode D12, the anode of diode D12 is connected with the work Lianyuan by resistance, the grounded emitter of photodiode, the negative electrode of described diode D12 is connected with the input port of charge control module 6.Described discharge level treatment circuit 3 is controlled charge control module 6 according to the order that sampling module 1 sends.
Described control module is made up of two triode Q3 and Q4, the base stage of described two triodes is respectively two signal input end of control module, the grounded emitter of two triodes, the collector electrode of two triodes connects the back is connected and is control module with working power output.
A kind of power supply management system for lithium battery pack, described battery pack is composed in series by eight Battery pack groups, and every Battery pack group is composed in series by eight joint lithium batteries, and each road sampling module is gathered the voltage signal of every Battery pack group respectively.When lithium battery group normal condition, what sampling module 1 was input to the discharge level treatment circuit is high level, triode Q1 conducting, the photoelectrical coupler conducting, the diode output low level, discharge control module 5 input D0/S receive low level, and 5 controls of discharge control module are put field tube DFET and are ended.Sampling module 1 is input to the low level that is of charging level treatment circuit 2, triode Q2 conducting, and the photoelectrical coupler conducting, the diode output low level, charge control module 6 input C0/S receive low level, and charge control module 6 controls are filled field tube CFET and are ended.
When sampling module 1 detects the lithium battery group and overcurrent, overvoltage, short circuit, over-temperature condition occur, sampling module 1 output low level, when any one road sampling module 1 outputs to discharge level treatment circuit 3 for low level, photoelectrical coupler ends, diode output high level, discharge control module 5 input port D0/S receive high level signal.
When sampling module 1 detects lithium battery and overvoltage or over-temperature condition occur, any one road sampling module outputs to charging level treatment circuit 2 and is in high-impedance state, and photoelectrical coupler ends, diode output high level, charge control module 6 input port C0/S receive high level.
Sampling module 1 is transported to single-chip microcomputer 4 with sampled signal by AD converter 7 simultaneously, when lithium battery group normal condition, single-chip microcomputer 4 is transported to charge control module 6 according to logic determines and discharge control module 5 is low level, when overcurrent, overvoltage, short circuit, over-temperature condition appear in the lithium battery group, single-chip microcomputer 4 is transported to discharge control module 5 and is high level, when overcurrent, overvoltage condition occurring, single-chip microcomputer is transported to charge control module 6 and is high level.
Any one input port receives that high level signal or two input ports all receive high level signal in two input ports of discharge control module 5, discharge control module output high level, the pipe conducting is produced in discharge, any one input port receives that high level signal or two input ports all receive high level signal in two input ports of charge control module 5, charge control module output high level, the pipe conducting is produced in charging.
The present invention adopts said structure, adopt dual control, single-chip microcomputer 4 receives the acquisition module signal, control filling field tube and putting field tube through logic determines, sampling module is controlled filling field tube and putting field tube by drive control module simultaneously, when wherein one tunnel control went wrong, another road control can guarantee to control filling field tube and putting field tube, has increased the stability of system.
Claims (7)
1. power supply management system for lithium battery pack, comprise the lithium battery group that composes in series by at least two lithium batteries, sampling module (1), the magnetic isolation module, the level treatment circuit, single-chip microcomputer (4), control module, switching circuit, it is characterized in that: the input of described sampling module (1) is connected with the two ends of lithium battery, described control module has two signal input end, the output of described sampling module is connected with the magnetic isolation module by the I2C bus with the level treatment circuit respectively, the magnetic isolation module is connected by the input of I2C bus with single-chip microcomputer (4), the output of described level treatment circuit is connected with a signal input end of control module, and the output of described single-chip microcomputer (4) is connected with another signal input end of control module, and the output of control module is connected with the input of switching circuit, output one end of described switching circuit is connected with battery pack by sampling resistor R1, and the other end is connected with load;
Described sampling module (1) is used to gather lithium battery two ends charge and discharge magnitude of voltage and sampling resistor sampling end voltage, will overcharge, cross discharge signal and deliver to the level treatment circuit and by the I2C bus signal is delivered to the magnetic isolation module;
Described single-chip microcomputer is used for receiving by the I2C bus digital signal of the sampling module that the magnetic isolation module handled, and judges, and outputs signal to control module;
Described level treatment circuit is used to receive overshoot, the mistake discharge signal that sampling module sends, and outputs signal to control module;
Described control module is used for receiving the control signal of single-chip microcomputer output simultaneously and the control signal of level treatment circuit output is carried out logic determines, outputs signal to switching circuit;
Described switching circuit is used to receive the logical signal that control module is exported, and is switched on or switched off the charge and discharge loop.
2. a kind of power supply management system for lithium battery pack according to claim 1, it is characterized in that: described level treatment circuit is made up of charging level treatment circuit (2) and discharge level treatment circuit (3), described control module (1) is made up of charge control module that all has two signal input end (6) and discharge control module (5), the output of charging level treatment circuit (2) and single-chip microcomputer (1) is connected with the signal input end of charge control module (6) respectively, and the output of described discharge level treatment circuit (3) and single-chip microcomputer is connected with the signal input end of discharge control module (5) respectively.
3. a kind of power supply management system for lithium battery pack according to claim 1, it is characterized in that: described switching circuit is made up of putting field tube DEFT and filling field tube CEFT of series connection, the grid of putting field tube DEFT is connected with the output of discharge control module, source electrode is connected with sampling resistor, the grid that fills field tube CEFT is connected with the output of charge control module, and source electrode is desired load and connected.
4. a kind of power supply management system for lithium battery pack according to claim 1 is characterized in that: the chip model of described sampling module (1) is OZ8920.
5. a kind of power supply management system for lithium battery pack according to claim 1 and 2, it is characterized in that: described discharge level treatment circuit (3) comprises triode Q1, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module 1 is connected with the base stage of triode Q1, the collector electrode of described triode Q1 is connected with the anode of light-emitting diode, the minus earth of described light-emitting diode, the collector electrode of described photodiode is connected with the anode of diode D11, the anode of diode is connected with working power by resistance, the grounded emitter of photodiode, the negative electrode of described diode D11 is connected with the input port of discharge control module (5), and described discharge level treatment circuit (2) is controlled discharge control module (5) according to the order that sampling module sends.
6. a kind of power supply management system for lithium battery pack according to claim 1 and 2, it is characterized in that: described charging level treatment circuit (2) comprises triode Q2, photoelectrical coupler, described photoelectrical coupler is made up of photophore and light-receiving device, described photophore is a light-emitting diode, described light-receiving device is a photodiode, the output of described sampling module is connected with the base stage of triode Q2, the collector electrode of described triode Q2 is connected with the negative electrode of light-emitting diode, the anode of described light-emitting diode connects power supply, the grounded emitter of triode Q2, the collector electrode of described photodiode is connected with the anode of diode D12, the anode of diode D12 is connected with the work Lianyuan by resistance, the grounded emitter of photodiode, and the negative electrode of described diode D12 is connected with the input port of charge control module 6.Described discharge level treatment circuit 3 is controlled charge control module 6 according to the order that sampling module 1 sends.
7. a kind of power supply management system for lithium battery pack according to claim 1, it is characterized in that: described control module is made up of two triodes, the base stage of described two triodes is respectively two inputs of control module, the emitter of two triodes connects back ground connection, and the collector electrode of two triodes connects the back is connected and is control module with working power output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010140237A CN101814754A (en) | 2010-03-31 | 2010-03-31 | Power supply management system for lithium battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010140237A CN101814754A (en) | 2010-03-31 | 2010-03-31 | Power supply management system for lithium battery pack |
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| CN101814754A true CN101814754A (en) | 2010-08-25 |
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| CN201010140237A Withdrawn CN101814754A (en) | 2010-03-31 | 2010-03-31 | Power supply management system for lithium battery pack |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888104A (en) * | 2010-06-02 | 2010-11-17 | 芜湖天元汽车电子有限公司 | Power management system for power lithium battery pack and control method thereof |
| CN103135062A (en) * | 2011-11-30 | 2013-06-05 | 凯迈(洛阳)电子有限公司 | Charge-discharge monitoring method of high-efficiency power battery |
| CN103178580A (en) * | 2012-02-20 | 2013-06-26 | 崇贸科技股份有限公司 | Interface circuit used for cascade connection and series battery management and method thereof |
| WO2014012211A1 (en) * | 2012-07-16 | 2014-01-23 | 深圳市安能能源技术有限公司 | Battery charging and discharging device and battery charging and discharging system |
| CN103762625A (en) * | 2013-12-31 | 2014-04-30 | 江苏嘉钰新能源技术有限公司 | Charging and monitoring device for electric automobile |
| CN108923488A (en) * | 2018-07-23 | 2018-11-30 | 浙江特康电子科技有限公司 | battery charging management system |
| WO2023232005A1 (en) * | 2022-05-31 | 2023-12-07 | 浙江特康电子科技有限公司 | Charger and charging method for battery pack |
| CN108923488B (en) * | 2018-07-23 | 2024-05-14 | 浙江特康电子科技有限公司 | Battery charging management system |
-
2010
- 2010-03-31 CN CN201010140237A patent/CN101814754A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888104A (en) * | 2010-06-02 | 2010-11-17 | 芜湖天元汽车电子有限公司 | Power management system for power lithium battery pack and control method thereof |
| CN103135062A (en) * | 2011-11-30 | 2013-06-05 | 凯迈(洛阳)电子有限公司 | Charge-discharge monitoring method of high-efficiency power battery |
| CN103178580A (en) * | 2012-02-20 | 2013-06-26 | 崇贸科技股份有限公司 | Interface circuit used for cascade connection and series battery management and method thereof |
| WO2014012211A1 (en) * | 2012-07-16 | 2014-01-23 | 深圳市安能能源技术有限公司 | Battery charging and discharging device and battery charging and discharging system |
| CN103762625A (en) * | 2013-12-31 | 2014-04-30 | 江苏嘉钰新能源技术有限公司 | Charging and monitoring device for electric automobile |
| CN108923488A (en) * | 2018-07-23 | 2018-11-30 | 浙江特康电子科技有限公司 | battery charging management system |
| CN108923488B (en) * | 2018-07-23 | 2024-05-14 | 浙江特康电子科技有限公司 | Battery charging management system |
| WO2023232005A1 (en) * | 2022-05-31 | 2023-12-07 | 浙江特康电子科技有限公司 | Charger and charging method for battery pack |
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Open date: 20100825 |