CN103051017A - Lithium cell energy balance control system and method - Google Patents
Lithium cell energy balance control system and method Download PDFInfo
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- CN103051017A CN103051017A CN2012105144626A CN201210514462A CN103051017A CN 103051017 A CN103051017 A CN 103051017A CN 2012105144626 A CN2012105144626 A CN 2012105144626A CN 201210514462 A CN201210514462 A CN 201210514462A CN 103051017 A CN103051017 A CN 103051017A
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Abstract
The invention discloses a lithium cell energy balance control system and a lithium cell energy balance control method. The lithium cell energy balance control system comprises a driving circuit, a control circuit, a cell unit, a voltage acquisition circuit, a voltage amplifying circuit and an MCU (Micro Control Unit) microprocessor which are connected in sequence, wherein an output end of the MCU microprocessor is connected with an MOS (Metal Oxide Semiconductor) transistor on the control circuit, also comprises CELL1, CELL2 and CELL3 ports which are connected to the MOS transistor on the control circuit respectively, and also comprises an MOS transistor; and the MOS transistor is connected with a system load. According to the system and the method, real-time signal sampling, processing, amplification, comparison and charging control can be performed on each cell unit in a cell pack by using the circuit connected with an input port of the MCU microprocessor; current duty ratio can be adjusted and controlled through a BLEED-DRIVER port connected with the MCU microprocessor and automatic opening and closing of the circuit can be realized according to information on electric quantity detection, so that the cell pack is protected; an A/D (Analog/Digital) port and a D/A port are arranged in the microprocessor, so that a conversion circuit is reduced, and the complexity degree of the entire system circuit is reduced; and by using the technical scheme provided by the invention, the energy waste is avoided, and the charging time is shortened.
Description
Technical field
The present invention relates to the battery voltage balanced technical field, relate in particular to a kind of lithium battery balancing energy control system and method.
Background technology
Practice shows that the cell life-span is longer than battery pack, and the reason battery pack exists in the process of using that each electric quantity of single batteries is unbalanced to be caused, and then reduces the useful life of whole battery.Although each cell model specification in the battery pack is the same, because the difference of manufacturing process and environment for use has caused the inconsistency of each electric quantity of single batteries.In the discharge process of battery pack, the minimum cell of electric weight uses electric weight at first, and the battery electric quantity deficiency is quit work; In the charging process of battery pack, the cell that electric weight is the highest charges at first and finishes, and makes battery pack show that electric weight is full of, and stops charging, causes other electric quantity of single batteries all can not charge.Can learn thus, take necessary technological means to come the control of balancing battery balancing energy to be very important.
This type of control system or device are disclosed by following patent literature in the prior art.
Chinese invention patent application prospectus CN1667909A has disclosed and has adopted resistance-type to consume the equilibrium that high electric weight cell consumes power reaches each cell of battery pack, improves the charge-discharge performance of battery pack; This mode consumes the high power capacity cell with form of heat, the utilization of the energy has been caused pollution, does not meet society to the requirement of energy conservation.
Chinese invention patent application prospectus CN101826642A has disclosed to adopt and has made the cell that links to each other in twos carry out energy transfer equilibrium, adopts each electric quantity of single batteries of dynamic power branch mode balancing battery group to reach balanced purpose; This dynamic power branch mode is in charging process, and is often consuming time longer, and the structure of system is also comparatively complicated, and Systems balanth is also relatively poor, and production cost is higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of lithium battery balancing energy control system and method for energy savings.
For achieving the above object, the invention provides following technical scheme: a kind of lithium battery balancing energy control system, comprise and connect successively drive circuit, transformer, control circuit, the voltage collection circuit group, voltage amplifier circuit group and MCU microprocessor, described voltage amplifier circuit group connects MCU processor input, described control circuit is provided with metal-oxide-semiconductor, described MCU output end of microprocessor also comprises CELL1, CELL2 and CELL3 port connect respectively the metal-oxide-semiconductor on the described control circuit, described MCU output end of microprocessor also comprises connection one metal-oxide-semiconductor, the load of described metal-oxide-semiconductor connected system.
Preferably, described MCU microprocessor connects the FPGA display driver by the RS232 PORT COM, and described FPGA display driver connects LCD display by the 16bit bus, is used for finishing man-machine information exchange.
Preferably, the output of described MCU microprocessor also comprises the BLEED_DRIVER port, and described BLEED_DRIVER port connects optocoupler by resistance, is used for regulating drive circuit electric current duty ratio.
Preferably, described transformer is the normal shock transformer.
Preferably, described voltage collection circuit group comprises several voltage collection circuits and battery unit, and described battery unit connects reverse proportional amplifier, gathers each battery cell voltage.
Preferably, described every group of reverse proportional amplifier connects signal amplifier, improves voltage impedance, will gather that loss limits minimum in the battery cell voltage transport process.
Preferably, described every group of signal amplifier connects MCU microprocessor input, MCU microprocessor samples comparative analysis battery cell voltage.
The present invention also provides a kind of lithium battery balancing energy control method, comprises for a plurality of battery units, according to described battery unit electric quantity acquisition, and processes by collection signal and signal and to be sent to microprocessor.
Preferably, described microprocessor internal is provided with A/D and D/A port.
Preferably, described microprocessor is judged for minimum electric weight battery unit charging according to signal analysis, is carried out charging operations.
Adopt the beneficial effect of above technical scheme to be: the present invention utilizes the circuit of MCU microprocessor input port connection to sample, process, amplify, to compare and to control and charge each battery unit live signal in the battery pack, until whole batteries charging is finished; The MCU output end of microprocessor also connects a LCD display and is used for man-machine exchange, and the information of charging process is provided, and can observe battery pack charging status by display; The BLEED_DRIVER port that the MCU microprocessor connects can the regulate electrical current duty ratio, carry out the automatic open-close of circuit according to the information that detects electric weight, battery pack is played the effect of protection, prolongs battery pack useful life; Acquisition Circuit group in the system can to the voltage signal voltage regulation filtering, improve the stability of voltage signal; Voltage amplifier circuit group in the system improves the input impedance of voltage signal, so that the MCU microprocessor collects Signal integrity; The A/D that microprocessor internal is provided with and D/A port reduce conversion circuit, reduce the whole system complexity in circuits; Adopt technical scheme of the present invention to avoid energy waste, shortened the charging interval.
Description of drawings
Fig. 1 is circuit diagram of the present invention;
Fig. 2 is the flow chart of energy content of battery equalization methods of the present invention;
Wherein, 1-drive circuit, 2-control circuit, 3-voltage collection circuit group, 4-voltage amplifier circuit group, the 5-MCU microprocessor, 6-FPGA display driver, 7-LCD display, 8-system load, 9-transformer, the 10-battery unit, the 11-collection signal, the 12-signal is processed, the 13-microprocessor.
Embodiment
In order to deepen the understanding of the present invention, the invention will be further described below in conjunction with embodiment and accompanying drawing, and this embodiment only is used for explaining the present invention, does not consist of the restriction to protection range of the present invention.
Describe preferred implementation of the present invention in detail below in conjunction with accompanying drawing 1: a kind of lithium battery balancing energy control system, comprise and connect successively drive circuit 1, control circuit 2, transformer, voltage collection circuit group 3, voltage amplifier circuit group 4 and MCU microprocessor 5, voltage amplifier circuit group 4 connects MCU processor 5 inputs, be provided with metal-oxide-semiconductor at control circuit 2, MCU microprocessor 5 outputs also comprise CELL1, CELL2 and CELL3 port connect respectively the metal-oxide-semiconductor on the control circuit, MCU microprocessor 5 outputs also comprise connection one metal-oxide-semiconductor, this metal-oxide-semiconductor connected system load, MCU microprocessor 5 connects FPGA display driver 6 by the RS232 PORT COM, FPGA display driver 6 connects LCD display 7 by the 16bit bus, is used for finishing man-machine information exchange; The output of MCU microprocessor 5 also comprises the BLEED_DRIVER port, and this BLEED_DRIVER port connects optocoupler by resistance, is used for regulating drive circuit electric current duty ratio; Voltage collection circuit group 3 comprises several voltage collection circuits and battery unit, battery unit connects reverse proportional amplifier, every group of reverse proportional amplifier connects signal amplifier, improves voltage impedance, will gather that loss limits minimum in the battery cell voltage transport process; Every group of signal amplifier connects MCU microprocessor 5 inputs, MCU microprocessor 5 sampling comparative analysis battery cell voltages.
A kind of lithium battery balancing energy control method, comprise for a plurality of battery units 10, according to described battery unit 10 electric quantity acquisitions, and process 12 by collection signal 11 and signal and be sent to microprocessor 13, be provided with A/D and D/A port in microprocessor 13 inside, microprocessor 13 can be judged for minimum electric weight battery unit 10 chargings according to signal analysis, carry out charging operations.
Adopt the beneficial effect of above technical scheme to be: the present invention utilizes the circuit of MCU microprocessor input port connection to sample, process, amplify, to compare and to control and charge each battery unit live signal in the battery pack, until whole batteries charging is finished; The MCU output end of microprocessor also connects a LCD display and is used for man-machine exchange, and the information of charging process is provided, and can observe battery pack charging status by display; The BLEED_DRIVER port that the MCU microprocessor connects can the regulate electrical current duty ratio, carry out the automatic open-close of circuit according to the information that detects electric weight, battery pack is played the effect of protection, prolongs battery pack useful life; Acquisition Circuit group in the system can to the voltage signal voltage regulation filtering, improve the stability of voltage signal; Voltage amplifier circuit group in the system improves the input impedance of voltage signal, so that the MCU microprocessor collects Signal integrity; The A/D that microprocessor internal is provided with and D/A port reduce conversion circuit, reduce the whole system complexity in circuits; Adopt technical scheme of the present invention to avoid energy waste, shortened the charging interval.
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (10)
1. lithium battery balancing energy control system, comprise and connect successively drive circuit, transformer, control circuit, voltage collection circuit group, voltage amplifier circuit group and MCU microprocessor, it is characterized in that: described voltage amplifier circuit group connects MCU processor input, described control circuit is provided with metal-oxide-semiconductor, described MCU output end of microprocessor comprises that also CELL1, CELL2 and CELL3 port connect respectively the metal-oxide-semiconductor on the described control circuit, described MCU output end of microprocessor also comprises connection one metal-oxide-semiconductor, the load of described metal-oxide-semiconductor connected system.
2. lithium battery balancing energy control system according to claim 1 is characterized in that: described MCU microprocessor connects the FPGA display driver by the RS232 PORT COM, and described FPGA display driver connects LCD display by the 16bit bus.
3. lithium battery balancing energy control system according to claim 1, it is characterized in that: the output of described MCU microprocessor also comprises the BLEED_DRIVER port, described BLEED_DRIVER port connects optocoupler by resistance.
4. lithium battery balancing energy control system according to claim 1, it is characterized in that: described transformer is the normal shock transformer.
5. lithium battery balancing energy control system according to claim 1, it is characterized in that: described voltage collection circuit group comprises several voltage collection circuits and battery unit, and described battery unit connects reverse proportional amplifier.
6. lithium battery balancing energy control system according to claim 5 is characterized in that: described every group of reverse proportional amplifier connection signal amplifier.
7. it is characterized in that according to claim 1 or 6 described lithium battery balancing energy control system: described every group of signal amplifier connects MCU microprocessor input.
8. lithium battery balancing energy control method is used for a plurality of battery units, it is characterized in that: according to described battery unit electric quantity acquisition, and process by collection signal and signal and to be sent to microprocessor.
9. lithium battery balancing energy control method according to claim 8, it is characterized in that: described microprocessor internal is provided with A/D and D/A port.
10. according to claim 8 or 9 described lithium battery balancing energy control methods, it is characterized in that: described microprocessor is judged for minimum electric weight battery unit charging according to signal analysis, is carried out charging operations.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105144626A CN103051017A (en) | 2012-12-04 | 2012-12-04 | Lithium cell energy balance control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105144626A CN103051017A (en) | 2012-12-04 | 2012-12-04 | Lithium cell energy balance control system and method |
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| CN103051017A true CN103051017A (en) | 2013-04-17 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471577A (en) * | 2007-12-29 | 2009-07-01 | 比亚迪股份有限公司 | Voltage balance circuit for double-burl chargeable battery |
| CN101764268A (en) * | 2010-01-13 | 2010-06-30 | 欣旺达电子股份有限公司 | Power battery balance charging method and power battery balancing circuit |
| CN102447278A (en) * | 2010-09-30 | 2012-05-09 | 镇江恒驰科技有限公司 | Electronic switch type equalizing circuit of power battery management system |
| CN202309117U (en) * | 2011-10-08 | 2012-07-04 | 上海锂曜能源科技有限公司 | Balanced system for storage battery pack |
| US20120176430A1 (en) * | 2011-01-11 | 2012-07-12 | Toshiba Tec Kabushiki Kaisha | Capacitive load drive circuit and inkjet head drive circuit |
| CN202384999U (en) * | 2012-01-12 | 2012-08-15 | 上海诺雅克电气有限公司 | Hot memory circuit of breaker |
| CN203205895U (en) * | 2012-12-04 | 2013-09-18 | 芜湖天元汽车电子有限公司 | Lithium battery energy balance control system |
-
2012
- 2012-12-04 CN CN2012105144626A patent/CN103051017A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471577A (en) * | 2007-12-29 | 2009-07-01 | 比亚迪股份有限公司 | Voltage balance circuit for double-burl chargeable battery |
| CN101764268A (en) * | 2010-01-13 | 2010-06-30 | 欣旺达电子股份有限公司 | Power battery balance charging method and power battery balancing circuit |
| CN102447278A (en) * | 2010-09-30 | 2012-05-09 | 镇江恒驰科技有限公司 | Electronic switch type equalizing circuit of power battery management system |
| US20120176430A1 (en) * | 2011-01-11 | 2012-07-12 | Toshiba Tec Kabushiki Kaisha | Capacitive load drive circuit and inkjet head drive circuit |
| CN202309117U (en) * | 2011-10-08 | 2012-07-04 | 上海锂曜能源科技有限公司 | Balanced system for storage battery pack |
| CN202384999U (en) * | 2012-01-12 | 2012-08-15 | 上海诺雅克电气有限公司 | Hot memory circuit of breaker |
| CN203205895U (en) * | 2012-12-04 | 2013-09-18 | 芜湖天元汽车电子有限公司 | Lithium battery energy balance control system |
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Application publication date: 20130417 |