CN102785581B - Two battery electrics electric power system - Google Patents
Two battery electrics electric power system Download PDFInfo
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- CN102785581B CN102785581B CN201110126133.XA CN201110126133A CN102785581B CN 102785581 B CN102785581 B CN 102785581B CN 201110126133 A CN201110126133 A CN 201110126133A CN 102785581 B CN102785581 B CN 102785581B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The present invention relates to automotive electronic technology, particularly a kind of polylith storage battery that utilizes is as the automobile power supply system of energy storage device.Comprise according to of the present invention pair of battery electrics electric power system: electrical generator; First storage battery, it is coupled to form current supply circuit with described parallel operation of generator; Second storage battery, itself and starter parallel coupled are to form starting-up later time; And control unit, it to be controllably coupling between described current supply circuit and described starting-up later time and to provide DC-dc conversion, wherein, described control unit implements DC-dc conversion operation to realize charging therebetween to the output of the described first or second storage battery, and implements DC-dc conversion operation to realize the charging of described electrical generator to described second storage battery to the output of described electrical generator.In one embodiment, guarantee that automobile successfully starts next time by the first storage battery and/electrical generator to the method for the second battery charge.
Description
Technical field
The present invention relates to automotive electronic technology, particularly a kind of polylith storage battery that utilizes is as the automobile power supply system of energy storage device.
Background technology
Traditional automobile depends on the fossil fuel of such as oil and so on as energy source, along with widely using of automobile, oil as non-renewable energy resources is just becoming day by day rare, if such situation continues, causes automobile to become piles and piles of scrap iron the most at last.In the face of so severe prospect, industry member is stepping up to tap a new source of energy automobile (such as pure electric automobile and hybrid vehicle) to break away from above-mentioned predicament.But be limited by the factor of each side such as manufacturing cost and its usage economy, the large-scale promotion commercialization of new-energy automobile also has very very long road to walk, and period also will run into many technical difficult problems.Based on above-mentioned situation, the consumption reducing the energy by the efficiency improved in existing automobile becomes a kind of selection of reality.
Automobile power supply system forms primarily of closed-center system (such as storage battery or ultracapacitor), energy conversion device (such as mechanical energy being converted to the electrical generator of electric energy), starter and control unit.In automobile power supply system, control unit is the core of whole system, and it is responsible for determining according to operating modes such as power load, battery condition and Generator Status and implementing suitable electric energy management strategy.Starter utilizes the energy of storage battery by automobile engine starting, and driving engine is operated under required mode of operation.During engine running, drive electrical generators is generated electricity, and the voltage request pressing automotive electrical system is to the electricity consumption load supplying of automobile with to battery charge.Such as, under the control of the control unit, if the electricity consumption electric current of automotive electrical system is greater than the supply current of electrical generator, then storage battery will discharge, with the electric current of covering the shortage, otherwise, if the electricity consumption electric current of automotive electrical system is less than the supply current of electrical generator, then difference between current a part as storage battery charging current and flow into storage battery.
The use electric load of automobile often has larger difference in electrical specification, such as, need during starter work to provide large peace immediate current doubly, and throw light on, small area analysis that the equipment such as sound equipment needs to provide the long period.In order to meet the need for electricity of above-mentioned two class loads simultaneously, industry generally adopts the storage battery of a Large Copacity and large polar plate area.But the shortcoming of this method is the shortening causing battery age, this is because may following situations be there is: after a particular period of use, storage battery is available as the accumulator started, but but cannot power for a long time, although or can power for a long time, but but cannot provide big current, in the face of these situations, it will be inevitable for changing storage battery.
Publication number is that the Chinese patent application of CN201317281Y discloses a kind of automotive electrical system, this system comprises the various electricity consumption devices in starter motor, storage battery, electrical generator, electrical system control device and automobile, storage battery comprises starting type accumulators and power supply type storage battery, the former and starter motor compose in parallel starting-up later time, the latter and electricity consumption device compose in parallel current supply circuit, and electrical system control device is connected between starting-up later time and current supply circuit.Automotive electrical system disclosed in above-mentioned Chinese patent application adopts two storage battery configuration to make battery-operated life-time dilatation become possibility, but to really extend the work life phase and improve the utilization ratio of electric energy simultaneously, also depending on perfect electric energy management strategy.
Summary of the invention
An object of the present invention is to provide a kind of two battery electrics electric power system, it can improve the utilization ratio of electric energy while the work life effectively extending storage battery.
According to one aspect of the present invention, provide a kind of two battery electrics electric power system, comprising:
A kind of two battery electrics electric power system, comprising:
Electrical generator;
First storage battery, it is coupled to form current supply circuit with described parallel operation of generator;
Second storage battery, itself and starter parallel coupled are to form starting-up later time; And
Control unit, it to be controllably coupling between described current supply circuit and described starting-up later time and to provide DC-dc conversion,
Wherein, described control unit implements DC-dc conversion operation to realize charging therebetween to the output of the described first or second storage battery, and implements DC-dc conversion operation to realize the charging of described electrical generator to described second storage battery to the output of described electrical generator.
Preferably, in above-mentioned pair of battery electrics electric power system, described control unit can also make described first and second storage batterys directly connect, and powers to described starter to be combined by described first and second storage batterys.
Preferably, in above-mentioned pair of battery electrics electric power system, described control unit comprises:
Battery condition monitoring device, for monitoring the state parameter of described first and second storage batterys;
DC-DC conversion device, for implementing DC-dc conversion operation to the output of described electrical generator, described first and second storage batterys; And
Device for managing and controlling electrical source, be coupled with described battery condition monitoring device and DC-DC conversion device, for the state parameter monitored according to described battery condition monitoring device, described DC-DC conversion device is indicated to implement the operation of corresponding DC-dc conversion.
Preferably, in above-mentioned pair of battery electrics electric power system, described state parameter comprises the electric current of described first and second storage batterys, voltage and temperature.
Preferably, in above-mentioned pair of battery electrics electric power system, after automobile stagnation of movement, if described device for managing and controlling electrical source judges that the state-of-charge of described second storage battery is not enough to make described starter normally work next time unloading phase, then indicate described DC-DC conversion device to implement DC-dc conversion operation with to described second battery charge to the output of described first storage battery, described state-of-charge obtains according to the electric current of described second storage battery, voltage and temperature computation.
Preferably, in above-mentioned pair of battery electrics electric power system, in vehicle traveling process, if described control unit judges that the state-of-charge of described second storage battery is lower than a predetermined threshold value, then indicate described DC-DC conversion device to implement DC-dc conversion operation with to described second battery charge to the output of described electrical generator, described state-of-charge obtains according to the electric current of described second storage battery, voltage and temperature computation.
Preferably, in above-mentioned pair of battery electrics electric power system, described control unit is controllably coupling between described current supply circuit and described starting-up later time by following manner: described pair of battery electrics electric power system comprises the first and second switching devices further, and they to be connected between described DC-DC conversion device and described first storage battery and to be controlled by the closed and disconnected state of described device for managing and controlling electrical source to described first and second switching devices between described DC-DC conversion device and described second storage battery.
Preferably, in above-mentioned pair of battery electrics electric power system, wherein, described battery condition monitoring device comprises the first and second sensor groups being respectively used to the state parameter of monitoring described first and second storage batterys, and if the difference of the degree of aging of described first and second storage batterys exceedes default threshold value, then determine at least one group of et out of order in described first and second sensor groups.
Preferably, in above-mentioned pair of battery electrics electric power system, comprise the 3rd switching device further, described control unit, by controlling the closed and disconnected state of described 3rd switching device, controls the direct connection between first and second storage battery described.
Preferably, in above-mentioned pair of battery electrics electric power system, described first-three switching device is realized by relay.
Preferably, in above-mentioned pair of battery electrics electric power system, described first storage battery is compared with described second storage battery, and the area of the former pole plate is less than the area of the latter's pole plate, and the thickness of the active substance on the former pole plate is greater than the thickness of the active substance on the latter's pole plate.
Compared with prior art, tool has the following advantages in the present invention:
Due to for automobile start and the non-start up stage use electrical feature, have employed the battery with different electrical specification and power respectively, therefore solve the shortcoming that battery life in a powered battery situation is short, cannot take into account different operating mode very well.In addition, in one embodiment, guarantee that automobile successfully starts next time by the first storage battery and/electrical generator to the method for the second battery charge.Moreover, in another embodiment, by adopting the adaptive battery monitoring mode of double cell reference each other, the fault of sensor can be determined quickly and accurately.
From following detailed description by reference to the accompanying drawings, above and other objects of the present invention and advantage will be made more completely clear.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the two battery electrics electric power systems according to one embodiment of the invention.
Fig. 2 is the structural representation of the control unit in two battery electrics electric power system shown in Fig. 1.
Fig. 3 is that two battery electrics electric power system shown in Fig. 1 is based on the workflow diagram starting preference strategy.
Fig. 4 A-4C is the workflow diagram of the routine A-C in Fig. 3.
Detailed description of the invention
Below by the specific embodiment of the present invention being described with reference to the drawings to set forth the present invention.But it is to be appreciated that these detailed description of the invention are only exemplary, restriction be there is no for spirit of the present invention and protection domain.
In this manual, " coupling " one word to should be understood to be included between two unit the situation directly transmitting energy or signal, or indirectly transmit the situation of energy or signal through one or more Unit the 3rd, and alleged signal includes but not limited to the signal of the form of electricity, light and magnetic existence here.In addition, " comprise " and the term of " comprising " and so on represents except having the unit and step that have in the specification and in the claims directly and clearly state, technical scheme of the present invention does not get rid of the situation had not by other unit of directly or clearly stating and step yet.Moreover the term of such as " first ", " second ", " the 3rd " and " the 4th " and so on does not represent order in time, space, size etc. of unit or numerical value and is only be used as to distinguish each unit or numerical value.
In addition, storage battery described here refers to and converts chemical energy electric energy can be produced galvanic device, and it includes but not limited to lead-acid storage battery and lithium cell etc.
two battery electrics electric power system
Fig. 1 is the schematic diagram of the two battery electrics electric power systems according to one embodiment of the invention.See Fig. 1, two battery electrics electric power systems 10 of the present embodiment comprise control unit 110, electrical generator 120, first and second storage battery 130A and 130B and the first-four switching device K1-K4.In FIG, heavy line represents power or energy flow, and fine line represents control signal and measurement signal stream.It is worthy of note, although here control unit 110 is connected with bus mode with the first-four switching device K1-K4 and electrical generator 120, but this does not also mean that and must be confined to this connection mode between control unit and controlled unit, in fact can adopt point-to-point connection mode between them yet.
In FIG, control unit 110 is cores of whole electric power system 10, it is responsible on the one hand according to electricity consumption situation (such as using the need for electricity of electric load 30 and 40), battery condition (is such as the working current of the first and second storage battery 130A and 130B here, operating voltage, temperature, one or more in degree of aging and state-of-charge (SOC)) and Generator Status (the current working current that can provide of such as electrical generator) etc. determine suitable electric energy management strategy, on the other hand, control unit 110 also has DC-to-DC transfer capability, to provide suitable charging valtage by boosting and reduced pressure operation to the first and second storage battery 130A and 130B.The above-mentioned functions of control unit 110 will be further described below.
As shown in Figure 1, the first storage battery 130A, electrical generator 120 and be connected in parallel to form current supply circuit by electric load 30.Control unit 110 accesses this current supply circuit through the first switching device K1.Meanwhile, the first storage battery 130A is also connected with the second storage battery 130B through second switch device K4.On the other hand, the second storage battery 130B, starter 20 and be connected in parallel to form starting-up later time by electric load 40.Control unit 110 accesses this starting-up later time through second switch device K2.Thus, in the present embodiment, comprise two connected passages between first and second storage battery 130A, 130B, wherein one through control unit 110, and another is Bypass control unit 110 then.It is worthy of note, although use electric load 30 and 40 here illustrates with two square frames, but in fact they refer to two groups by electric load, wherein, automobile is referred at the car electrics irrelevant with startup by electric load 30, include but not limited to car light, blowing engine, air-conditioning and sound equipment etc., and refer to the electronic machine relevant to automobile starting by electric load 40, include but not limited to various for measuring startup time state sensor and electronic control unit (ECU) etc.In the present embodiment, power primarily of the second storage battery 130B by electric load 40, and when the second storage battery 130B power supply capacity is not enough, is combined by the first and second storage battery 130A and 130B and power to by electric load 40.
In the embodiment shown in fig. 1, control unit 110 utilize the first-four switching device K1-K4 come control circuit turn on and off realize corresponding electric energy management strategy, wherein, turning on and off of passage between current supply circuit and control unit 110 is controlled by the first switching device K1, turning on and off of passage between starting-up later time and control unit 110 is controlled by second switch device K2, second storage battery 130B and being controlled by the 3rd switching device K3 with turning on and off of the passage between electric load 40, first and second storage battery 130A, the turning on and off of passage be directly connected between 130B is controlled by the 4th switching device K4.Keying and the disconnection of above-mentioned first-four switching device K1-K4 are all controlled by control unit 110, and they such as can be realized by relay.
In the present embodiment, the power supply (also i.e. starter 20 and the power supply by electric load 40) in automobile starting stage is responsible for providing primarily of the second storage battery 130B.Due to unloading phase need large immediate current, therefore can the second storage battery 130B be designed to compared with the first storage battery 130A, have larger polar plate area be beneficial to improve export intensity of current.In addition, power primarily of the first storage battery 130A and electrical generator 120 by electric load 30.Owing to being need to provide long small area analysis with the characteristics of power supply of electric load, therefore the first storage battery 130A can be designed as compared with the second storage battery 130B, and pole plate is formed thicker active substance.
control unit
Fig. 2 is the structural representation of the control unit in two battery electrics electric power system shown in Fig. 1.As shown in Figure 2, control unit 110 comprises device for managing and controlling electrical source 1101, DC-DC conversion device 1102 and battery condition monitoring device 1103.In fig. 2, heavy line represents power or energy flow, and fine line represents control signal and measurement signal stream.In the present embodiment, device for managing and controlling electrical source 1101, between DC-DC conversion device 1102 and battery condition monitoring device 1103 by the LINK bus communication of unit inside, and device for managing and controlling electrical source 1101 and battery condition monitoring device 1103 are communicated by the CAN of unit outside and external device (such as the first-three switching device K1-K4, with electric load 30, electrical generator 120 etc.).
Device for managing and controlling electrical source 1101 is determined suitable electric energy management strategy according to electricity consumption situation, battery condition and Generator Status etc. and generates corresponding control command.These control commands are provided to the DC-DC conversion device 1102 and battery condition monitoring device 1103 that are positioned at control unit 110 inside and the first-four switching device K1-K4 being positioned at control unit 110 outside.About the determination mode of electric energy management strategy will be described in detail below.
The output voltage of DC-DC conversion device 1102 self generator 120, first and second storage battery 130A and 130B in future is transformed to required vdc.Such as, DC-DC conversion device 1102 can be made DC-to-DC conversion operations to the output of electrical generator 120 and charge to the second storage battery 130B to make electrical generator 120, or can make DC-to-DC conversion operations to the output of the first storage battery 130A and charge to the second storage battery 130B to make the first storage battery 130A.And for example, DC-DC conversion device 1102 can be made DC-to-DC conversion operations to the output of the second storage battery 130B and charges to the first storage battery 130A to make the second storage battery 130B.
Battery condition monitoring device 1103 is connected the state parameter (operating voltage of such as storage battery, working current and temperature etc.) of monitoring the first and second storage battery 130A and 130B by CAN with sensor.The state parameter recorded is sent to device for managing and controlling electrical source 1101 by the LINK bus through control unit 110 inside.Battery condition monitoring device 1103 is configured to have sensor fault diagnosis function.Specifically, can be the first and second storage battery 130A with 130B and be equipped with the consistent or basically identical sensor group of two groups of performances, and the Occupation coefficient of two pieces of storage batterys is controlled similar or close (such as being remained in a less scope by the difference of the SOC making the first and second storage battery 130A and 130B).Battery condition monitoring device 1103 regularly or aperiodically can monitor the degree of aging (such as by the internal resistance of measurement two pieces of storage batterys) of the first and second storage battery 130A and 130B, and if their degree of aging or internal resistance difference comparatively large (threshold value that such as absolute difference is default more than), then battery condition detecting device 1103 can judge that sensor group breaks down.
start preference strategy
In this manual, start preference strategy and refer to so a kind of electric energy management strategy, it can drive starter as the target of preferential management using enough electric power.For this reason, in the above-described embodiments, based on startup preference strategy, the power supply capacity of the second storage battery 130B should maintain on certain level by device for managing and controlling electrical source 1101 in control unit 110 as much as possible, and enables the first and second storage battery 130A and 130B when the power supply capacity of the second storage battery 130B is not enough simultaneously and power to starter 20 with by electric load 40 simultaneously.Here, the SOC of storage battery can be adopted as the parameter weighing power supply capacity.
controlling electric energy management process
Describe according to of the present invention pair of battery electrics electric power system based on the workflow starting preference strategy by Fig. 3 and 4A-4C below.For setting forth conveniently, be described for the two battery electrics electric power systems shown in Fig. 1 and 2 here.But it should be understood that above-mentioned workflow also can be applicable to the two battery electrics electric power systems by other embodiments of the invention.
See Fig. 3, in step 310, the unloading phase that first whether the device for managing and controlling electrical source 1101 of control unit 110 judging that automobile is current and be in.If judged result is true, then enters routine A, otherwise enter step 320.
In step 320, device for managing and controlling electrical source 1101 judges that automobile is under steam or stagnation of movement.If judge that automobile is in the process of moving, then enter routine B, if judge automobile stagnation of movement, then enter routine C.
Workflow diagram shown in Fig. 4 A corresponds to the routine A in Fig. 3.See Fig. 4 A, in step 410A, device for managing and controlling electrical source 1101 obtains the state parameter (such as operating voltage, working current and temperature) of the second storage battery 130B from battery condition monitoring device 1103.
Then enter step 412A, device for managing and controlling electrical source 1101 calculates the SOC of the second storage battery 130B according to the state parameter obtained.About the method for calculating of SOC will be further described below.
Enter step 414A subsequently, according to the SOC of the second storage battery 130B, device for managing and controlling electrical source 1101 judges whether its power supply capacity can meet starter 20 and the need for electricity by electric load 40.If the SOC of the second storage battery 130B is more than or equal to first threshold Th1, then device for managing and controlling electrical source 1101 judges that the power supply capacity of the second storage battery 130B is sufficient, now enters step 416A, otherwise, then judge that the power supply capacity of the second storage battery 130B is not enough, now enter step 418A.
In step 416A, device for managing and controlling electrical source 1101 sends control command to the first-four switching device K1-K4, make second switch device K3 closed and remaining switching device all disconnects, now the second storage battery 130B is as actuated type battery, powers separately to starter 20 with by electric load 40.Due to unloading phase need large immediate current, therefore can the second storage battery 130B be designed to compared with the first storage battery 130A, have larger polar plate area be beneficial to improve export intensity of current.
In step 418A, device for managing and controlling electrical source 1101 sends control command to the first-four switching device K1-K4, first and second switching device K1 and K2 are disconnected and the third and fourth switching device K3 and K4 closes, now first and second storage battery 130A, 130B are simultaneously as actuated type battery, combine and power to starter 20 with by electric load 40.
Workflow diagram shown in Fig. 4 B corresponds to the routine B in Fig. 3.See Fig. 4 B, in step 410B, device for managing and controlling electrical source 1101 receives power load data (such as working current and voltage) through CAN from the controller of each car electrics electric load 30, receive duty parameter (such as generating voltage, payload and generator speed etc.) through CAN from the controller of electrical generator 120, and obtain the state parameter (such as operating voltage, working current and temperature) of first and second storage battery 130A, 130B through LINK bus from battery condition monitoring device 1103.
Enter step 412B subsequently, meet total power load of data calculating electric load 30 according to the electricity consumption received and calculate the SOC of first and second storage battery 130A, 130B according to the state parameter obtained.A kind of optimal way adopts load current monitoring math modeling to calculate total power load, specifically, (blower fan of such as air-conditioning comprises 1 ~ 8 grade to the electric current of each current consumer under different gear and temperature, determine that the 4th grade of current strength needed is 15 peaces through measuring) measured in advance, like this when receiving the data about the opening of each car electrics and range state from bus, device for managing and controlling electrical source 1101 can calculate the power demand of each electrical equipment rapidly, exactly.
Enter step 414B subsequently, according to the duty parameter of electrical generator 120, device for managing and controlling electrical source 1101 determines whether its power supply capacity is greater than total workload demand of the use electric load 30 calculated in abovementioned steps 412B.If result is true, then enter step 416B, otherwise, enter step 418B.
In step 416B, device for managing and controlling electrical source 1101 controls electrical generator 120, makes it power to by electric load 30.
Then enter step 420B, device for managing and controlling electrical source 1101 judges whether the SOC of the second storage battery 130B is more than or equal to Second Threshold Th2, and this Second Threshold Th2 is greater than pre-determined first threshold Th1.If judged result is true, then shows that the power supply capacity of the second storage battery 130B is sufficient, now exit routine B, otherwise, then show that the power supply capacity of the second storage battery 130B may be not enough, now enter step 422B.
In step 422B, device for managing and controlling electrical source 1101 sends control command to the first-four switching device K1-K4, make that the first and secondth switching device K1, K2 is kept closed and third and fourth switching device K3, K4 is in off-state, DC-dc conversion operation is done in the now output of DC-DC conversion device 1102 pairs of electrical generators 120 and the first storage battery 130A, charges until the SOC of the second storage battery 130B reaches Second Threshold Th2 to the second storage battery 130B to make electrical generator 120 and the first storage battery 130A.
Return aforesaid another branching step 418B.In this step, according to the SOC of the duty parameter of electrical generator 120 and the first storage battery 130A, device for managing and controlling electrical source 1101 determines whether the power supply capacity of electrical generator 120 and the first storage battery 130A is greater than total workload demand of the use electric load 30 calculated in abovementioned steps 412B.If result is true, then enter step 424B, otherwise, enter step 426B.
In step 424B, device for managing and controlling electrical source 1101 controls electrical generator 120 and the first storage battery 130A, makes them power to by electric load 30.Enter step 420B afterwards.
In step 426B, device for managing and controlling electrical source 1101 controls electrical generator 120 and the first storage battery 130A, makes them power to by electric load 30, with backed off after random routine B.
Workflow diagram shown in Fig. 4 C corresponds to the routine C in Fig. 3.See Fig. 4 C, in step 410C, device for managing and controlling electrical source 1101 obtains the state parameter (such as operating voltage, working current and temperature) of the second storage battery 130B from battery condition monitoring device 1103.
Then enter step 412C, device for managing and controlling electrical source 1101 calculates the SOC of the second storage battery 130B according to the state parameter obtained.About the method for calculating of SOC will be further described below.
Enter step 414C subsequently, according to the SOC of the second storage battery 130B, device for managing and controlling electrical source 1101 judges whether its power supply capacity is enough to need for electricity when ensureing startup next time.If the SOC of the second storage battery 130B is more than or equal to first threshold Th2, then device for managing and controlling electrical source 1101 judge the second storage battery 130B substantially can ensure next time start time need for electricity, now enter step 416C, otherwise, device for managing and controlling electrical source 1101 judges there is the risk that cannot successfully start next time, now enters step 418C.
In step 416C, device for managing and controlling electrical source 1101 sends control command to the first-four switching device K1-K4, makes these switching devices all be in off-state and with backed off after random routine C.
In step 418C, device for managing and controlling electrical source 1101 sends control command to the first-four switching device K1-K4, make the first and second switching device K1 and K2 closed and the third and fourth switching device K3 and K4 disconnects, now the first storage battery 130A charges to the second storage battery 130B through DC-DC conversion device 1102.
sOC calculates
The method of calculating of storage battery SOC is below described.
Conventional SOC method of calculating mainly contains open circuit voltage method and Current integrating method (also referred to as ampere-hour method).
The basic thought of open circuit voltage method be first set up a reflection battery operated time terminal voltage, electric current and electro-motive force relational model, then obtain corresponding electro-motive force and determine SOC according to measuring the voltage and current that obtains in order to the relation curve between electro-motive force and SOC.The advantage of the method is simple, but makes the SOC that estimates and actual value have phase difference larger because battery exists self-recoverage effect and " platform " phenomenon.
Battery is considered as the "black box" carrying out energy exchange with outside by Current integrating method, by recording the accumulative variable quantity of battery electric quantity to the electric current integration in time of turnover battery.The method is owing to need not consider the change of inside battery structure and state, therefore stronger compared with the comformability of open circuit voltage method.But weak point is SOC initial value to be usually difficult to determine and will constantly to increase along with time lapse cumulative errors, thus the error calculated of SOC value is caused to become large.In addition, need have one to estimate accurately to discharge and recharge coefficient when Current integrating method calculates SOC, when cell operating conditions changes greatly, discharge and recharge coefficient is difficult to determine accurately and timely, and this also can cause finally calculating SOC result and there is larger error.
The present inventor proposes following a kind of SOC method of calculating, its main points first storage battery are divided into two states, namely internal storage battery Stability Analysis of Structures and the less state (being also called state 1 below) of the electric current flowed through and internal storage battery structural instability or the larger state (being also called state 2 below) of the electric current that flows through, then adopt different algorithms for different states.
The present inventor finds through research, and after automobile remains static and exceedes a period of time, the inner structure of storage battery is generally more stable; Contriver also finds, automobile remain static exceed a period of time after and the electric current of storage battery is less than certain current value (this value experimentally can be determined and substantially keep fixing at battery-operated life period for one piece of storage battery) time, the accuracy of the SOC of the storage battery calculated with following formula (1) is higher:
SOC＝η1×[Es+I×(R0+Rr)]+η2(1)
Wherein Es is the voltage of storage battery, and I is the electric current of storage battery, and R0 is the ohmic internal resistance of storage battery, and Rr is the polarization resistance of storage battery, and η 1 and η 2 is constant (can be determined by experiment).
On the other hand, when the electric current that automobile is in running state or storage battery is more than or equal to above-mentioned current value, contriver finds that the precision of the result calculated by formula (1) can not make us satisfied, now should adopt the SOC of Current integrating method calculating accumulator.
Because temperature has an impact to the SOC of storage battery, therefore in order to obtain accurate result, temperature factor should be taken into account.Contriver finds through research, and following formula (2) can reflect the impact of temperature on the SOC calculated according to Current integrating method preferably:
Wherein Δ t is the temperature boost value of storage battery, and i (x) is for storage battery is at the electric current of moment x, and t is for from initial time to current the experienced time, and a, b and c are the constant be determined by experiment.
In a word, according to above-mentioned account form, first judge that storage battery is in state 1 or state 2, if be in the former, then utilize the SOC of formula (1) calculating accumulator, otherwise utilize the SOC of formula (2) calculating accumulator.
Due to can under the spirit not deviating from essential characteristic of the present invention, implement the present invention in a variety of manners, therefore present embodiment is illustrative and not restrictive, because scope of the present invention is defined by claims, instead of defined by specification sheets, therefore fall into all changes in the border of claim and boundary, or thus the equivalent of this claim border and boundary is forgiven by claim.
Claims (8)
1. a two battery electrics electric power system, comprising:
Electrical generator;
First storage battery, it is coupled to form current supply circuit with described parallel operation of generator;
Second storage battery, itself and starter parallel coupled are to form starting-up later time; And
Control unit, it to be controllably coupling between described current supply circuit and described starting-up later time and to provide DC-dc conversion,
Wherein, described control unit implements DC-dc conversion operation to realize charging therebetween to the output of the described first or second storage battery, and DC-dc conversion operation is implemented to realize the charging of described electrical generator to described second storage battery to the output of described electrical generator
Wherein, described control unit can also make described first and second storage batterys directly connect, and powers to described starter to be combined by described first and second storage batterys,
Wherein, described control unit comprises:
Battery condition monitoring device, for monitoring the state parameter of described first and second storage batterys;
DC-DC conversion device, for implementing DC-dc conversion operation to the output of described electrical generator, described first and second storage batterys; And
Device for managing and controlling electrical source, be coupled with described battery condition monitoring device and DC-DC conversion device, for the state parameter monitored according to described battery condition monitoring device, described DC-DC conversion device is indicated to implement the operation of corresponding DC-dc conversion
Wherein, described battery condition monitoring device comprises the first and second sensor groups being respectively used to the state parameter of monitoring described first and second storage batterys, and if the difference of the degree of aging of described first and second storage batterys exceedes default threshold value, then determine at least one group of et out of order in described first and second sensor groups.
2. battery electrics electric power system as claimed in claim 1 two, wherein, described state parameter comprises the electric current of described first and second storage batterys, voltage and temperature.
3. two battery electrics electric power system as claimed in claim 2, wherein, after automobile stagnation of movement, if described device for managing and controlling electrical source judges that the state-of-charge of described second storage battery is not enough to make described starter normally work next time unloading phase, then indicate described DC-DC conversion device to implement DC-dc conversion operation with to described second battery charge to the output of described first storage battery, described state-of-charge obtains according to the electric current of described second storage battery, voltage and temperature computation.
4. two battery electrics electric power system as claimed in claim 2, wherein, in vehicle traveling process, if described control unit judges that the state-of-charge of described second storage battery is lower than a predetermined threshold value, then indicate described DC-DC conversion device to implement DC-dc conversion operation with to described second battery charge to the output of described electrical generator, described state-of-charge obtains according to the electric current of described second storage battery, voltage and temperature computation.
5. two battery electrics electric power system as claimed in claim 1, wherein, described control unit is controllably coupling between described current supply circuit and described starting-up later time by following manner: described pair of battery electrics electric power system comprises the first and second switching devices further, and they to be connected between described DC-DC conversion device and described first storage battery and to be controlled by the closed and disconnected state of described device for managing and controlling electrical source to described first and second switching devices between described DC-DC conversion device and described second storage battery.
6. two battery electrics electric power system as claimed in claim 5, wherein, comprise the 3rd switching device further, described control unit, by controlling the closed and disconnected state of described 3rd switching device, controls the direct connection between first and second storage battery described.
7. two battery electrics electric power system as claimed in claim 6, wherein, described first switching device, second switch device and the 3rd switching device are realized by relay.
8. two battery electrics electric power system as claimed in claim 1, wherein, described first storage battery is compared with described second storage battery, and the area of the former pole plate is less than the area of the latter's pole plate, and the thickness of the active substance on the former pole plate is greater than the thickness of the active substance on the latter's pole plate.
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Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103522916A (en) * | 2013-10-31 | 2014-01-22 | 济南宏昌车辆有限公司 | Double power sources switching control system of electric car |
| CN104691445B (en) * | 2013-12-09 | 2017-01-18 | 北汽福田汽车股份有限公司 | Low-voltage power supply system used for vehicle and control method of low-voltage power supply system |
| DE102015001050A1 (en) * | 2015-01-29 | 2016-08-04 | Man Truck & Bus Ag | Method and device for controlling and / or regulating at least one operating parameter of the electrical energy store influencing an aging state of an electrical energy store |
| JP6254139B2 (en) * | 2015-11-28 | 2017-12-27 | 本田技研工業株式会社 | Power supply system, transport equipment, and power transmission method |
| JP6223406B2 (en) * | 2015-11-28 | 2017-11-01 | 本田技研工業株式会社 | Power supply system |
| JP6728991B2 (en) * | 2016-05-31 | 2020-07-22 | 株式会社オートネットワーク技術研究所 | Relay device and power supply device |
| CN106080454A (en) * | 2016-07-25 | 2016-11-09 | 徐州徐工汽车制造有限公司 | A kind of automobile storage battery management system |
| CN106246433B (en) * | 2016-08-01 | 2018-06-26 | 中国第一汽车股份有限公司 | A kind of starter control method based on double battery power supply systems |
| KR101765641B1 (en) * | 2016-09-09 | 2017-08-23 | 현대자동차 주식회사 | Apparatus and method for controlling starting of engine for mild hybrid electric vehicle |
| WO2018098795A1 (en) * | 2016-12-02 | 2018-06-07 | 深圳市仁恒星越科技有限公司 | Engine starting system |
| FR3059956B1 (en) * | 2016-12-14 | 2019-11-15 | Renault S.A.S. | STARTING THE THERMAL MOTOR OF A MOTOR VEHICLE WITH MANAGEMENT OF TWO OR MORE BATTERIES IN CASE OF CRITICAL NEED |
| CN106870237A (en) * | 2017-03-22 | 2017-06-20 | 上汽通用汽车有限公司 | The starting method of the engine of vehicle and device |
| CN109131165A (en) * | 2018-09-28 | 2019-01-04 | 北京首汽智行科技有限公司 | A kind of vehicle power supply control apparatus |
| CN109291797B (en) * | 2018-11-02 | 2021-10-15 | 蔚来(安徽)控股有限公司 | Device and method for providing electrical protection, electrical system and mobile charging vehicle |
| CN110816446A (en) * | 2019-10-24 | 2020-02-21 | 湖南行必达网联科技有限公司 | Double-battery control system and fuel vehicle |
| CN110920548B (en) * | 2019-11-20 | 2021-11-23 | 北京汽车股份有限公司 | Vehicle power supply control method, controller, system and vehicle |
| CN111634192A (en) * | 2020-05-21 | 2020-09-08 | 一汽奔腾轿车有限公司 | Vehicle dual-voltage energy recovery system and control method thereof |
| CN111634247A (en) * | 2020-05-22 | 2020-09-08 | 一汽奔腾轿车有限公司 | Vehicle double-battery energy supply system and control method thereof |
| CN112046427A (en) * | 2020-09-11 | 2020-12-08 | 中国第一汽车股份有限公司 | Vehicle power supply system and power supply control method |
| CN112510810B (en) * | 2020-12-07 | 2023-04-11 | 中国第一汽车股份有限公司 | Automobile and monitoring circuit of power supply system thereof |
| CN113581007B (en) * | 2021-08-04 | 2023-05-26 | 秦皇岛奥卡深软件开发有限公司 | Driving charging system of lithium battery pack standby power supply and control method |
| CN114374261A (en) * | 2021-11-30 | 2022-04-19 | 际络科技(上海)有限公司 | Automatic driving redundant power supply system, equipment and redundant power supply method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2855817Y (en) * | 2006-01-13 | 2007-01-10 | 山东理工大学 | Super electric capacity auxiliary starting device used for vehicle |
| CN101407180A (en) * | 2007-10-11 | 2009-04-15 | 李尔公司 | Dual energy-storage for a vehicle system |
| CN101544196A (en) * | 2008-03-27 | 2009-09-30 | 福特环球技术公司 | Dual battery vehicle electrical systems |
| CN101930057A (en) * | 2010-06-13 | 2010-12-29 | 深圳市睿德电子实业有限公司 | Method and system for detecting faults of power batteries |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201317281Y (en) * | 2008-12-16 | 2009-09-30 | 上海通用汽车有限公司 | Vehicle electrical system |
| DE102009000046A1 (en) * | 2009-01-07 | 2010-07-08 | Robert Bosch Gmbh | On-board network for a vehicle with start-stop system |
-
2011
- 2011-05-16 CN CN201110126133.XA patent/CN102785581B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2855817Y (en) * | 2006-01-13 | 2007-01-10 | 山东理工大学 | Super electric capacity auxiliary starting device used for vehicle |
| CN101407180A (en) * | 2007-10-11 | 2009-04-15 | 李尔公司 | Dual energy-storage for a vehicle system |
| CN101544196A (en) * | 2008-03-27 | 2009-09-30 | 福特环球技术公司 | Dual battery vehicle electrical systems |
| CN101930057A (en) * | 2010-06-13 | 2010-12-29 | 深圳市睿德电子实业有限公司 | Method and system for detecting faults of power batteries |
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