CN103818266A - Management control algorithm for energy storage battery - Google Patents
Management control algorithm for energy storage battery Download PDFInfo
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- CN103818266A CN103818266A CN201410100442.3A CN201410100442A CN103818266A CN 103818266 A CN103818266 A CN 103818266A CN 201410100442 A CN201410100442 A CN 201410100442A CN 103818266 A CN103818266 A CN 103818266A
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Abstract
The invention discloses a management control algorithm for an energy storage battery. According to the method, a bi-directional data channel between an energy storage battery management system and an energy management unit is built, in this way, synchronous working of the energy storage battery management system and the energy management unit is achieved, a traditional relatively independent working mode of the energy storage battery management system is changed, working condition changes can be tracked in real time to adjust own detection and management strategies, and dynamic parameter measurement and calculation are achieved through statically detecting and dynamically managing the state of the battery, so that the state and performance of the battery are evaluated comprehensively in a high-precision mode.
Description
Technical field
The present invention relates to a kind of energy-storage battery management control algorithm, belong to new forms of energy closed-centre system field.
Background technology
At extended-range electric vehicle, in the closed-centre system application such as hybrid electric vehicle, electri forklift, intelligent grid and microgrid, can there is quick and violent variation in the operating mode of system, tradition energy-storage battery management system can real-time monitoring battery state, battery status is made to assessment, assessment result is directly reported to entire car controller, inverter homenergic administrative unit.Closed-centre system is relatively independent system, only have closed-centre system to send information to energy management unit, energy management unit is passive reception, this is a kind of unidirectional information delivery format, bring two limitations: 1) due to closed-centre system cannot perception operating mode variation, belong to a kind of blind Detecting mode, cannot judge and detect data actual effect, be more that battery static response is assessed, real-time is poor; 2) be subject to 1) in assessment restriction to battery performance and state, the battery status dynamic characteristic information that energy management unit obtains is restricted, energy management unit cannot accurately control that the motor of electric machine controller is exerted oneself, state, the parameter adjustment of inverter etc. of charger, affect the efficiency of whole system, energy state and the power rating of system cannot be accurately provided, as the residue course of battery-driven car, max power constraint etc., the life and reliability of battery system is also affected simultaneously.
Summary of the invention
The invention provides a kind of energy-storage battery management control algorithm, solved the problem of two limitations bringing for unidirectional information delivery format between traditional energy-storage battery management system and energy management unit.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of energy-storage battery management control algorithm, comprises the following steps,
Step 1, connects energy-storage battery management system and energy management unit, realizes synchronous working between the two, goes to step two;
Step 2, energy management unit is predicted the operating mode of car load, and accepts the state parameter changing value of car load, goes to step three;
Step 3, compares the threshold value of setting and state parameter changing value, and in the time that state parameter changing value is less than threshold value, car load, in static schema, goes to step four; In the time that state parameter changing value is greater than threshold value, car load, in dynamic mode, goes to step seven;
Step 4, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step five;
Step 5, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery state is monitored and calibration operation, goes to step six;
Step 6, to energy management unit, and follows new battery status table by monitoring and the result feedback of calibration operation;
Step 7, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step eight;
Step 8, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery parameter is measured, and goes to step nine;
Step 9, to energy management unit, and upgrades battery parameter table by the result feedback of measuring.
The method that realizes energy-storage battery management system and energy management unit synchronous working in step 1 is between energy-storage battery management system and energy management unit, connect by communication protocol or connect by hardware connection lead.
State parameter changing value described in step 2 and step 3 comprises the changing value of power, the changing value of electric current, changing value and the time gap of voltage.
Threshold value described in step 3 comprises power threshold, current threshold, voltage threshold and time gap threshold value, and described threshold value is with the characteristic of hysteresis.
Monitoring described in step 5 comprises that open circuit voltage detects and battery balanced detection, and calibration operation comprises that battery SOC is calibrated and multiplexer channel is more accurate.
In step 8, battery parameter comprises ohmage and polarization resistance.
The invention has the beneficial effects as follows: the present invention is by setting up the bidirectional data path between energy-storage battery management system and energy management unit, realize the synchronous working of energy-storage battery management system and energy management unit, change traditional relatively independent mode of operation of energy-storage battery management system, can real-time tracking system working conditions change, adjust self detection and operating strategy, by the Static Detection to battery status and dynamic management, realize dynamic parameter measurement and computing, thus high precision comprehensive assessment battery status and performance.
Accompanying drawing explanation
Fig. 1 is diagram of circuit of the present invention.
The specific embodiment
Below in conjunction with Figure of description, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, a kind of energy-storage battery management control algorithm, comprises the following steps.
Step 1, connects energy-storage battery management system and energy management unit, realizes synchronous working between the two, goes to step two.
In order to realize synchronous working, generally make between energy-storage battery management system and energy management unit, connect by communication protocol or connect by hardware connection lead, trigger realization synchronously by variation or positive rise/falling edge of level.
Step 2, the operating mode of energy management unit prediction car load (operating mode refers to smooth-ride, acceleration, deceleration, parking, the state such as idle), and accept the state parameter changing value of car load, go to step three.
Wherein state parameter changing value is because the variation of operating mode causes, generally comprise the changing value of car load power, the changing value of electric current, changing value and the time gap of voltage, but the changing value that certainly also has a lot of other changing values the present invention mainly to use is above-mentioned four kinds of changing values.
Step 3, compares the threshold value of setting and state parameter changing value, and in the time that state parameter changing value is less than threshold value, car load is in static schema, and car load working conditions change is slow, goes to step four; In the time that state parameter changing value is greater than threshold value, car load is in dynamic mode, car load operating mode acute variation such as: accelerating, in brake etc., go to step seven.
Wherein threshold value is that people is for being pre-existing in energy management unit, comprise power threshold, current threshold, voltage threshold and time gap threshold value (speed requirement), threshold value is to change one to one with above-mentioned state parameter, in order to improve anti-interference resistance threshold value all with the characteristic of hysteresis.
Step 4, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step five.
Step 5, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery state is monitored and calibration operation, goes to step six.
Above-mentioned monitoring comprises that open circuit voltage detects and battery balanced detection, and calibration operation comprises that battery SOC is calibrated and multiplexer channel is more accurate.In the process of stable state, electric current, change of voltage amplitude and speed are all little, the collection of battery information can be slow, therefore, in the process of patrolling and examining, can separate portion of time interval, voltage, current channel are calibrated, be exactly directly sense channel to be inputted to short circuit, measure 0 input drift (offset), remove calibration inspection chronometric data.In the situation that there is no electric current, send open circuit voltage detection signal, the voltage of measuring energy-storage battery is open circuit voltage, can the instant charging state of calibration battery.Slowly in situation, can also carry out battery balanced action at curent change.
Step 6, to energy management unit, and follows new battery status table by monitoring and the result feedback of calibration operation.
Step 7, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step eight.
Step 8, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery parameter is measured, and goes to step nine.
Above-mentioned parameter comprises ohmage and polarization resistance, except above parameter energy-storage battery management system also can be measured other parameters of energy-storage battery, certainly in the method mainly take ohmage and these two parameters of polarization resistance as main.
Below characterising parameter measurement process for example.
Binary channel voltage and current synchronously detects (take the internal resistance of cell as example): voltage channel is measured the voltage variety of some time gaps, current channel is measured the voltage variety at interval at the same time, it is exactly the internal resistance of battery in current change quantity that voltage variety removes, set different time gaps, obtain ohmic internal resistance and polarization resistance.
Binary channel synchronizing voltage detects: can reduce each passage and detect number of batteries, and raising speed, the correlativity of cell pressure is just large like this, just cell pressure can be added and obtain more accurate total voltage.
Binary channel current detecting: binary channel adopts different dynamic ranges, in the time that curent change is violent, can be for different dynamic ranges, one of them channel data of Dynamic Selection is as detecting data.
Step 9, to energy management unit, and upgrades battery parameter table by the result feedback of measuring.
Above-mentioned energy-storage battery management control algorithm is by setting up the bidirectional data path between energy-storage battery management system and energy management unit, realize the synchronous working of energy-storage battery management system and energy management unit, change traditional relatively independent mode of operation of energy-storage battery management system, can real-time tracking system working conditions change, adjust self detection and operating strategy, by the Static Detection to battery status and dynamic management, realize dynamic parameter measurement and computing, thus high precision comprehensive assessment battery status and performance.
Can further be reduced to intelligent battery sensor assembly in conjunction with energy-storage battery management system of the present invention, realize modularization and the normalisation of battery management, be beneficial to mass production, improve alerting ability and particularity that battery information gathers simultaneously; Simultaneously, under the applicable cases of individualism energy management unit not, realize energy management by battery charger and electric machine controller, intelligent charging machine and the electric machine controller that can synchronize with battery sensor or BMS according to this principle design.
More than show and described groundwork of the present invention, principal character and advantage.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. an energy-storage battery management control algorithm, is characterized in that: comprises the following steps,
Step 1, connects energy-storage battery management system and energy management unit, realizes synchronous working between the two, goes to step two;
Step 2, energy management unit is predicted the operating mode of car load, and accepts the state parameter changing value of car load, goes to step three;
Step 3, compares the threshold value of setting and state parameter changing value, and in the time that state parameter changing value is less than threshold value, car load, in static schema, goes to step four; In the time that state parameter changing value is greater than threshold value, car load, in dynamic mode, goes to step seven;
Step 4, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step five;
Step 5, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery state is monitored and calibration operation, goes to step six;
Step 6, to energy management unit, and follows new battery status table by monitoring and the result feedback of calibration operation;
Step 7, energy management unit sends synchronous sense command to energy-storage battery management system, goes to step eight;
Step 8, energy-storage battery management system is accepted synchronous sense command, and energy-storage battery parameter is measured, and goes to step nine;
Step 9, to energy management unit, and upgrades battery parameter table by the result feedback of measuring.
2. a kind of energy-storage battery management control algorithm according to claim 1, it is characterized in that: the method that realizes energy-storage battery management system and energy management unit synchronous working in step 1 is between energy-storage battery management system and energy management unit, connect by communication protocol or connect by hardware connection lead.
3. a kind of energy-storage battery management control algorithm according to claim 1, is characterized in that: the state parameter changing value described in step 2 and step 3 comprises the changing value of power, the changing value of electric current, changing value and the time gap of voltage.
4. a kind of energy-storage battery management control algorithm according to claim 1, is characterized in that: the threshold value described in step 3 comprises power threshold, current threshold, voltage threshold and time gap threshold value, and described threshold value is with the characteristic of hysteresis.
5. a kind of energy-storage battery management control algorithm according to claim 1, is characterized in that: the monitoring described in step 5 comprises that open circuit voltage detects and battery balanced detection, and calibration operation comprises that battery SOC is calibrated and multiplexer channel is more accurate.
6. a kind of energy-storage battery management control algorithm according to claim 1, is characterized in that: in step 8, battery parameter comprises ohmage and polarization resistance.
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| CN110749827A (en) * | 2019-12-02 | 2020-02-04 | 山东大学 | Intelligent battery SOC management system and method based on cloud platform |
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