CN103795123A - Intelligent battery management system based on supercapacitor active equalization - Google Patents
Intelligent battery management system based on supercapacitor active equalization Download PDFInfo
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- CN103795123A CN103795123A CN201410056730.3A CN201410056730A CN103795123A CN 103795123 A CN103795123 A CN 103795123A CN 201410056730 A CN201410056730 A CN 201410056730A CN 103795123 A CN103795123 A CN 103795123A
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Abstract
The invention discloses an intelligent battery management system based on supercapacitor active equalization. The intelligent battery management system based on the supercapacitor active equalization comprises a battery pack, a detection/protection system, an active equalization system, a main controller system and a display system, wherein the main controller system is respectively in bidirectional communication with the signal end of the display system and the signal end of the detection/protection system, the control signal output end of the main controller system is communicated with the signal input end of the battery pack through the active equalization system, and the detection/protection system is in bidirectional communication with the battery pack. Compared with an existing intelligent management system, through the intelligent battery management system based on the supercapacitor active equalization, switching speed can be improved to dozens of kHz, energy transfer efficiency can be improved effectively, reliable switching logic is achieved, system safety is ensured, the energy transformation efficiency of the system is made to be higher, and energy consumption is smaller. Multiple battery packs can be monitored simultaneously, cascade of the battery packs can be achieved, and requirements of complex systems can be met. Through the visual design of a human-computer interface, system parameters can be set conveniently, and states of the battery packs can be known clearly.
Description
Technical field
The present invention relates to a kind of intelligent battery management devices, relate in particular to a kind of Intelligent battery management system based on ultracapacitor active equalization.
Background technology
Monomer battery voltage platform only has 3.2-3.7V, conventionally need to be composed in series battery pack use and just can reach voltage request.In discharge process, if the voltage of some cell is low, lose again discharge capability, at this moment it just becomes an electrical appliance, other still have the cell of capacity to be just together in series to its charging, the reverse electrode phenomena that occurs cell, can not normally work whole battery pack, the cell life-span of antipole is caused to great impact simultaneously.In charging process, first the cell being first discharged, can be filled again, so just there will be the phenomenon of overcharging, and whole battery pack can not be normally fully charged.Do not managed if allow battery system move in this case, the useful life of battery and the reliability of system all can be affected.
For guaranteeing that battery performance is good, extend battery, must battery be managed rationally and effectively and be controlled.Battery management system manages the use procedure of battery pack, to the monitoring state of each cell in battery pack, can maintain the state consistency of cell in battery pack, avoid unbalanced decay and the safety issue that causes battery performance of each cell.
Although the function of traditional capacitance balanced way can meet the demands, but because the useful life of relay is short and switching speed is too slow, the problem such as electrochemical capacitor internal resistance is large in addition, may burn out because switch logic is asynchronous with switch speed circuit and even cause that battery short circuit blasts.Therefore this scheme is always at the experimental stage, can, to product step transition, just because of this, almost have the product of plenary capacitance equilibrium to occur on market.
Summary of the invention
It is a kind of based on ultracapacitor active equalization that object of the present invention is just to provide, in order to solve the Intelligent battery management system that battery pack is rationally effectively managed and controlled.
To achieve these goals, the technical solution used in the present invention is: a kind of Intelligent battery management system based on ultracapacitor active equalization, comprise battery pack, detection/protection system, active equalization system, main controller system and display system, described main controller system respectively with the signal end diconnected of display system, detection/protection system, the control signal output of described main controller system is communicated with the signal input part of battery pack by described active equalization system, described detection/protection system and described battery pack diconnected;
As preferably, described main controller system comprises data handling system, control module and communication system, and described data handling system comprises voltage monitoring system, current monitoring system, temperature monitoring system and dump energy supervisory control system; Described control module is communicated with active equalization system; Described communication system comprises downgoing communication system and uplink communication system;
As preferably, described detection/protection system comprises processor of single chip computer, battery voltage detection system, battery pack current detection system, battery pack temperature detection system, battery pack overvoltage/Over Current Protection System, battery pack residual capacity measurement system and CAN communication system;
As preferably, described downgoing communication system adopts CAN communication modes, and is communicated with the CAN communication system of detections/protection system, described uplink communication system employing USB or ethernet communication mode, and be communicated with display system;
As preferably, described processor of single chip computer adopts 16 double-core single-chip microcomputers;
As preferably, described battery pack is made up of several battery subsystem in parallel, and it is in series that each battery subsystem is propped up battery cell by n;
As preferably, described active equalization system is made up of n-1 group ultracapacitor and multi-channel switch;
As preferably, described ultracapacitor is double electric layer capacitor;
As preferably, described multi-channel switch is made up of metal-oxide-semiconductor and photoelectrical coupler;
As preferably, described display system adopts PC or TFT.
Compared with prior art, the invention has the advantages that:
1, adopt on the one hand by metal-oxide-semiconductor and photoelectrical coupler and FPGA algorithm replacement traditional relay, switching speed can be brought up to tens kHz, can effectively improve energy transfer efficiency, and there is reliable switch logic, guarantee system safety; On the other hand, adopt ultracapacitor to replace electrochemical capacitor.Because ultracapacitor has compared with electrochemical capacitor, capacity is large, internal resistance is little, the advantages such as instantaneous large-current can be provided, and makes the efficiency of system capacity conversion higher, and power consumption is less.
2, the present invention adopts transmission monitor by CAN bus, battery pack to be managed, and can monitor multiple battery pack simultaneously, realizes the cascade of battery pack, meets the requirement of complication system;
3, in addition, the visual design of man-machine interface, is convenient to initialization system parameter and clearly understands battery pack state.
Accompanying drawing explanation
Fig. 1 is management system structural principle block diagram of the present invention;
Fig. 2 is detection/protection system structural principle block diagram;
Fig. 3 is active equalization system structural principle block diagram;
Fig. 4 is main controller system structural principle block diagram;
Fig. 5 is that capacitive energy is moved principle schematic.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.As shown in Figure 1, a kind of Intelligent battery management system based on ultracapacitor active equalization, comprises battery pack, detection/protection system, active equalization system, main controller system and display system.Described main controller system respectively with the signal end diconnected of display system, detection/protection system; The control signal output of described main controller system is communicated with the signal input part of battery pack by described active equalization system; Described detection/protection system and described battery pack diconnected.Described detection/protection system is used for gathering battery pack information, protection battery cell; Described active equalization system is for carrying out equalization operation to described battery pack; Described main controller system is for data analysis, system control and data message transmitting-receiving; Described display system shows for system parameter setting and information; Described battery pack is made up of several battery subsystem in parallel, and it is in series that each battery subsystem is propped up battery cell by n.
Described detection/protection system; as shown in Figure 2, comprise processor of single chip computer, battery voltage detection system, battery pack current detection system, battery pack temperature detection system, battery pack overvoltage/Over Current Protection System, battery pack residual capacity measurement system and CAN communication system.Detect in real time the parameters such as battery pack current, voltage, temperature and capacity; by described CAN communication system, parameter information is uploaded to described main controller system; carry out analyzing and processing by described main controller system; and accept the guarded command that described master controller issues by described downgoing communication system, guarded command comprises overcurrent protection, overvoltage protection.
Described active equalization system, as shown in Figure 3, is made up of n-1 group ultracapacitor and multi-channel switch, and described ultracapacitor is double electric layer capacitor, for battery pack active equalization, has the features such as efficiency is high, simple in structure, low in energy consumption; Described multi-channel switch is made up of metal-oxide-semiconductor and photoelectrical coupler.In the time that described master control system detects described battery pack not in described equilibrium state, described main controller system switches described by-pass switch described battery pack is carried out to equalization operation.
Described main controller system, as shown in Figure 4, comprises data handling system, control module and communication system.Described data handling system comprises voltage monitoring system, current monitoring system, temperature monitoring system and dump energy supervisory control system; Described control module is communicated with active equalization system.Described data handling system and described control module are made up of FPGA and peripheral circuit.Described data handling system realizes calculating and the fault judgement of voltage, electric current, temperature and the electric weight of described battery pack; Described control module is used for controlling active equalization system and carries out equalization operation; Described communication system comprises downgoing communication system and uplink communication system.By described display system, initialization system parameter arbitrarily, as as described in equalizing voltage limit value, as described in equalizing voltage precision etc., send to described master controller to preserve by described display system by described uplink communication system, the battery pack state information that simultaneously can send by described uplink communication system described master controller is carried out real-time update demonstration.
Described downgoing communication system adopts CAN communication modes, and is communicated with the CAN communication system of detection/protection system, and described uplink communication system adopts USB or ethernet communication mode, and is communicated with display system.
Described display system adopts PC or TFT, in order to system parameters to be set, as equalizing voltage limit value, equalizing voltage precision etc., and show the information such as described battery voltage, battery pack current, battery pack temperature, battery pack dump energy and battery pack balancing state that described main controller system sends by described uplink communication system.Described equalizing voltage limit value refers to and allows the maximum voltage value that reaches of battery, and battery exceedes this magnitude of voltage and just need to start described active equalization system this battery is carried out to equilibrium; Described equalizing voltage precision refers to the maximum permissible pressure between balanced rear described battery pack; Described battery pack balancing state refers to that the each monomer voltage of described battery pack is all in described equalizing voltage limit value, and between each monomer, pressure reduction is all not more than described equalizing voltage precision.
Be illustrated in figure 5 capacitive energy and move principle schematic, balanced principle of the present invention is the same with traditional scheme, all adopt energy to move mode, difference is that traditional scheme adopts respectively mechanical relay and electrochemical capacitor to realize variable connector and energy is moved intermediary, and the present invention adopts metal-oxide-semiconductor and photoelectrical coupler to realize variable connector, adopt ultracapacitor to realize energy and move intermediary, and equalization operation is controlled by the master controller take FPGA as main control chip.No matter battery pack is in charging, electric discharge or static any state, main controller system is all monitored described battery pack balancing state in real time, as long as detect that battery is not at equilibrium, control and start described active equalization system, the energy content of battery high voltage is moved on the battery that voltage is low.
Described energy is moved specific implementation process and is divided into following three steps:
Suppose that a certain moment battery B1 voltage exceedes described equalizing voltage limit value.
The first step: K switch 1 and contact 1 closure, K switch 2 and contact 3 closures, make battery B1 discharge to capacitor C 1;
Second step: when capacitor C 1 voltage is elevated to while equating with battery B1 voltage, by K switch 1 and contact 2 closures, K switch 2 and contact 4 closures, utilize capacitor C 1 to charge to battery B2;
The 3rd step: when charging to battery B2 voltage and equating with capacitor C 1 voltage, cut-off switch K1 and K2, now the portion of energy of battery B1 has been transferred on battery B2.
Above three steps are that primary energy is moved process, if now battery does not reach described battery pack balancing state yet, must repeat above-mentioned steps, stop energy and move operation until battery pack reaches equilibrium state.
The present invention, with 16 double-core chip microcontroller detection system basic functions, adopts ultracapacitor to realize active equalization function, adopts FPGA to realize data processing and system control.Adopt active equalization more low in energy consumption than passive equilibrium, and adopt ultracapacitor to realize active equalization, again than lower by traditional active equalization mode power consumptions such as transformer, electrochemical capacitors.
Above a kind of Intelligent battery management system based on ultracapacitor active equalization provided by the present invention is carried out to detailed introduction, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to be possible to change of the present invention and improvement, and can not exceed design and the scope of accessory claim defined, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the Intelligent battery management system based on ultracapacitor active equalization; it is characterized in that: comprise battery pack, detection/protection system, active equalization system, main controller system and display system; described main controller system respectively with the signal end diconnected of display system, detection/protection system; the control signal output of described main controller system is communicated with the signal input part of battery pack by described active equalization system, described detection/protection system and described battery pack diconnected.
2. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 1, it is characterized in that: described main controller system comprises data handling system, control module and communication system, described data handling system comprises voltage monitoring system, current monitoring system, temperature monitoring system and dump energy supervisory control system; Described control module is communicated with active equalization system; Described communication system comprises downgoing communication system and uplink communication system.
3. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 2, is characterized in that: described detection/protection system comprises processor of single chip computer, battery voltage detection system, battery pack current detection system, battery pack temperature detection system, battery pack overvoltage/Over Current Protection System, battery pack residual capacity measurement system and CAN communication system.
4. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 2; it is characterized in that: described downgoing communication system adopts CAN communication modes; and be communicated with the CAN communication system of detection/protection system; described uplink communication system adopts USB or ethernet communication mode, and is communicated with display system.
5. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 1, is characterized in that: described battery pack is made up of several battery subsystem in parallel, and it is in series that each battery subsystem is propped up battery cell by n.
6. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 1, is characterized in that: described active equalization system is made up of n-1 group ultracapacitor and multi-channel switch.
7. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 6, is characterized in that: described ultracapacitor is double electric layer capacitor.
8. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 6, is characterized in that: described multi-channel switch is made up of metal-oxide-semiconductor and photoelectrical coupler.
9. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 1, is characterized in that: described display system adopts PC or TFT.
10. a kind of Intelligent battery management system based on ultracapacitor active equalization according to claim 3, is characterized in that: described processor of single chip computer adopts 16 double-core single-chip microcomputers.
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| CN115378456A (en) * | 2022-10-25 | 2022-11-22 | 成都嘉纳海威科技有限责任公司 | Receiving and transmitting amplifying attenuation multifunctional chip |
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| CN109638925A (en) * | 2019-01-21 | 2019-04-16 | 中科院合肥技术创新工程院 | A kind of battery management system based on active equalization |
| CN110208676A (en) * | 2019-05-20 | 2019-09-06 | 西北工业大学 | Front end reads the equivalent noise charge test circuit and test method of integrated circuit |
| CN112688374A (en) * | 2020-12-03 | 2021-04-20 | 华南理工大学 | Lithium battery pack active equalization system based on super capacitor energy storage transfer |
| CN115378456A (en) * | 2022-10-25 | 2022-11-22 | 成都嘉纳海威科技有限责任公司 | Receiving and transmitting amplifying attenuation multifunctional chip |
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Effective date of registration: 20161123 Address after: High tech Zone Chengdu city Sichuan Province Jincheng Road 610000 No. 666 3 12 storey building No. 8 Patentee after: Chengdu concave Amperex Technology Limited Address before: 610000 Sichuan Province, Chengdu District of Qingbaijiang City Industrial Development Zone with Road No. 866 Patentee before: Chengdu Zhitian Polymer Material Co.,Ltd. |
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Address after: High tech Zone Chengdu city Sichuan Province Jincheng Road 610000 No. 666 3 12 storey building No. 8 Patentee after: Anshi new energy (Chengdu) Co., Ltd Address before: High tech Zone Chengdu city Sichuan Province Jincheng Road 610000 No. 666 3 12 storey building No. 8 Patentee before: CHENGDU OK NEW ENERGY TECHNOLOGY Co.,Ltd. |
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