CN103199587A - Method using wireless charging to achieve new energy automobile battery active equalization and system using wireless charging to achieve new energy automobile battery active equalization - Google Patents
Method using wireless charging to achieve new energy automobile battery active equalization and system using wireless charging to achieve new energy automobile battery active equalization Download PDFInfo
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- CN103199587A CN103199587A CN2013101159059A CN201310115905A CN103199587A CN 103199587 A CN103199587 A CN 103199587A CN 2013101159059 A CN2013101159059 A CN 2013101159059A CN 201310115905 A CN201310115905 A CN 201310115905A CN 103199587 A CN103199587 A CN 103199587A
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Abstract
The invention provides a method using wireless charging to achieve new energy automobile battery active equalization and data command transmission and a system using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission. The system using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission comprises a battery management system, a battery pack and a low-voltage battery, wherein the battery pack is a high-voltage battery module formed by single batteries connected in series. Each single battery, the battery management system and the low-voltage battery are all provided with a circuit which can receive and transmit wireless power and data commands. Each circuit comprises a microprocessor, an input and output circuit, a battery information collecting circuit, a series resonant circuit and the like. All coils are located in the same electric field or magnetic field. The method using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission is a cheap, reliable and efficient battery pack battery bi-direction active equalization energy conversion method. By using the method using the wireless charging to achieve the new energy automobile battery active equalization and the data command transmission, single battery information can be transmitted to a battery managing device, and the battery managing device can send electric energy transfer commands to all single batteries.
Description
Technical field
The present invention relates to battery balanced field, particularly a kind of mode of utilizing wireless charging battery method and system of balanced purpose initiatively of reaching new-energy automobile.
Background technology
In short supply day by day along with petroleum resources, the development of new-energy automobile more and more is subjected to the attention of each big depot.New-energy automobile refers to all other energy automobiles except gasoline, Diesel engine.Comprise fuel cell car, hybrid vehicle, hydrogen energy source power vehicle and solar telephone etc.Battery is an important components for new-energy automobile.On the new forms of energy car, in order to obtain bigger power, can adopt the series-connected cell method to form battery pack (or power brick) usually.When a Battery pack is discharged and recharged, consider the inconsistency of each cell, generally can adopt balanced measure to guarantee fail safe and stability.Equilibrium is exactly to utilize electronic technology, and the battery cell voltage deviation is remained in the scope of expection, thereby guarantees that each cell is not damaged when normal the use.If do not carry out equilibrium control, along with the increase of charge and discharge cycles, each monomer battery voltage breaks up gradually, and will reduce greatly useful life.Battery balanced passive equilibrium and initiatively balanced two kinds of can being divided into again, wherein passive equilibrium refers to that the unnecessary electric weight of the cell that voltage is high consumes by conductive discharge or other forms, the realization of passive equilibrium is simple, but has certain unsafe factor, and is unfavorable for energy-conservation and environmental protection; Initiatively balancedly refer to that a part of electric weight with high-tension cell is transmitted back to battery circuit by conversion equipment or directly is transferred in the low pressure storage battery.Initiatively more commonly utilize transformer to realize high-low pressure electrical isolation and electric energy conversion in the scheme of equilibrium, but owing to material temperature sensitivity, reason such as volume is big, weight is big, transformer is not suitable for the environment that the such temperature difference of automobile is big, vibrations are strong very much.The core component of the inventive method is a coil, contrast traditional transformer and at aspects such as price, volume, weight absolute advantage is arranged all, and utilize coil except realizing that the wireless charging function can also send data, information such as the voltage of cell, temperature can also be sent to battery management system by wireless mode, more can realize orientation and the transmitted in both directions of electric energy.Because can predicting the adding of wireless charging technology, above some advantage of wireless charging will play huge facilitation to the battery balanced development of new-energy automobile.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of cheapness, reliably and the energy conversion device of the two-way active equilibrium of power brick battery efficiently, and utilizes this device to realize the method that cell information is instructed to each battery cell transmission electric energy transfer to battery manager (BMS) transmission and battery manager (BMS).
In order to solve problem in the prior art, the invention provides a kind of wireless charging that utilizes and realize the initiatively method of equilibrium of new-energy automobile battery,
Step 1: battery management system sends the request signal of signals collecting to the electric field at wireless charging system place or all coils that are connected with battery in the magnetic field by the coil that is connected with battery management system;
Step 2: each battery cell in the power brick and A-battery send the signal of battery separately separately successively to battery management system according to the order that provides in advance;
Step 3: battery management system judges whether to need to carry out battery balanced action by each signal that receives:
If do not need to carry out battery balanced action, then battery balanced end;
Carry out battery balanced action if desired, then battery management system sends battery balanced instruction to the battery of needs discharges and needs the battery of charging, needs the battery of discharge to switch to outside wireless power state, needs the battery of charging to switch to the state of being recharged;
Step 4: after charging is finished, send equilibrium to battery management system and finish signal; And restart step 1.
As a further improvement on the present invention, each battery cell in the described power brick and A-battery send separately cell voltage, temperature signal to battery management system successively according to the order that provides in advance separately.
As a further improvement on the present invention, the wireless charging coil circuit with the battery management system connection is identical with the resonance frequency of the wireless charging coil circuit that is connected with battery.
As a further improvement on the present invention, the battery that needs the battery of discharge maybe to need to charge sends equilibrium to battery management system and finishes signal.
As a further improvement on the present invention, when the voltage of the battery of needs discharges drops to by outside wireless power when identical with the voltage of other battery cell in the power brick, need the wireless controller of the battery of discharge that coil is closed, stop outside power supply, and also coil is disconnected after needing the wireless controller of the battery cell of charging to detect not have rechargeable energy to send over.
As a further improvement on the present invention, also comprise A-battery, the battery cell in the power brick can charge to A-battery, and A-battery also can be charged to each battery cell.
Realize system for carrying out said process, it comprises battery management system, power brick, A-battery, the high-tension battery module of power brick for being composed in series by cell, each cell, battery management system and A-battery have a circuit that receives and launch radio energy and data command, this circuit comprises a microprocessor, imput output circuit and battery information Acquisition Circuit, series resonant circuit, and all coils is in same electric field or the magnetic field.
The present invention is better to high-low pressure part isolation effect.Isolation between traditional battery management system the inside high pressure and low-pressure section is a big problem always, even used various isolating chips and isolating transformer all can only reach several kilovolts isolation voltage, and the coil of wireless charging can transmit energy and signal several centimetres to several meters distance, and isolation voltage can be very easy to reach tens thousand of volts to tens million of volts.
Cost reduces significantly.What saved that range transformer, isolating chip and various high pressure resistant holding wire bring is that the cost of whole system reduces significantly.
Realized the orientation transmission of electric energy.Utilized wireless power and the signal transfer functions of coil to make the transmission of electric energy become very simple.Can power the very convenient orientation transmission that just can realize electric energy to another or a plurality of specific battery because be in the electric energy of any battery in the same magnetic field.
Wireless transmission of signal such as cell voltage, temperature have been realized.
Description of drawings
Fig. 1 is the system architecture diagram that battery equalization system of the present invention is formed.
Fig. 2 is the wireless power principle of magnetic resonance mode.
Fig. 3 is the method for utilizing wireless mode transmission data.
Fig. 4 is the read method of wireless transmission data.
Fig. 5 is the workflow diagram of the active equilibrium of battery modules (power brick).
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
The invention provides a kind of wireless charging that utilizes and realize the method and system that the active of new-energy automobile battery is balanced and data command transmits, system comprises battery management system, power brick, A-battery, the high-tension battery module of power brick for being composed in series by cell, each cell, battery management system and A-battery have a circuit that receives and launch radio energy and data command, this circuit comprises a microprocessor, imput output circuit, battery information Acquisition Circuit, series resonant circuit etc., and all coils is in same electric field or the magnetic field.
Be illustrated in figure 1 as system architecture diagram of the present invention.MCU among Fig. 1 on the cell is the wireless controller of battery cell, B partly is the battery management system (BMS) of new-energy automobile, C is the high-tension battery module (power brick) for being composed in series by cell partly, and the 12V battery is the storage battery of automobile low-voltage electrical appliance power supply.Each cell, battery management system and A-battery are all by a circuit of being made up of coil and electric capacity with same concussion frequency among the figure, this circuit comprises a microprocessor (MCU), some imput output circuits and battery information Acquisition Circuit, it both can switching coil charging and be subjected to electricity condition, (as Fig. 3) can also transmit and receive data.
Be illustrated in figure 2 as the principle of wireless power.When a coil is inductance and a capacitances in series, the frequency relation of the oscillating circuit that they are formed is
If be arranged in two coils in the magnetic field, adjust to same frequency when two coils, to resonate a specific frequency in other words, they just can exchange energy each other.From tradition reason in theory, though electric energy can be converted into the electromagnetic wave of propagating by invisible medium, realize the wireless transmission of electric energy, electromagnetic wave is radiation to all the winds, and energy can scatter and disappear in a large number, so wireless charging efficient is not high.The breakthrough part of this method is to have utilized " catching " electromagnetic method, has namely utilized physical " resonance " principle---and two identical objects of vibration frequency can the high efficiency of transmission energy.So this method has solved the problem of wireless charging inefficiency, make power brick utilize wireless power to realize that initiatively balanced efficient is guaranteed.
Be illustrated in figure 3 as the method for wireless signal transmission.Utilize fixed frequency to be input to the capacitor and inductor radiating circuit that has same frequency as the square-wave signal of carrier wave when one, this signal can be had the receiving circuit of same concussion frequency to receive by wireless mode, so just can reach the purpose of radio communication.
Be illustrated in figure 3 as two coils with a certain same fixed frequency of oscillation, the signal that utilizes this frequency will send as carrier wave when a coil becomes modulating wave and sends to coil, just become the signal with sine wave characteristics through this modulation signal behind inductance and the electric capacity and gone out by wireless transmission, another coil in this magnetic field will obtain an identical signal with sine wave characteristics.Can be implemented in the transmission that realizes signal in a certain magnetic field by this method.Utilize this wireless signal transmission method can transmit the control signal of monomer battery voltage signal, battery temperature signal, battery management system, the charging signals of A-battery etc.
Be illustrated in figure 4 as the recognition methods of wireless data.When the square-wave modulation signal of transmitting terminal when being high, the signal that the receiving terminal coil receives is one section sine wave that amplitude is higher, when the square-wave modulation signal of transmitting terminal when low, the signal that the receiving terminal coil receives is one section sine wave that amplitude is lower.The signal recognition method of receiving terminal coil is for finishing as one to next trailing edge for beginning with a trailing edge, in a byte rising edge to the time of next trailing edge long be " 1 ", the time weak point be " 0 ".The data segment of " 0 " and " 1 " can be formed data, and these data both can have been transmitted battery cell information also can transmit the BMS charging instruction.
The implementation method of wireless charging:
Can wrap wireless charging modes such as field coupled, electromagnetic induction and magnetic resonance for the balanced wireless charging method of the active of the battery in this method.Wherein the cardinal principle of way of electromagnetic induction is an equipment that utilizes electromagnetic induction principle to charge, and is similar to the voltage device.At transmitting terminal and receiving terminal a coil is arranged respectively, the transmitting terminal coil is connected with AC power and produces electromagnetic signal, powers to power consumption equipment thereby the electromagnetic signal of the coil-induced transmitting terminal of receiving terminal produces electric current; The principle of the mode of magnetic resonance is identical with the resonance principle of sound.Arrange the identical tuning fork of vibration frequency, a sounding, other also can resonance sounding.Equally, be arranged in the coil of the identical vibration frequency in the magnetic field, also can be from one to another power supply.With respect to way of electromagnetic induction, the magnetic resonance mode can be extended transmission distance.And the magnetic resonance mode is different from way of electromagnetic induction, need not to make the position between coil to fit like a glove.The battery that uses the magnetic resonance mode so initiatively balanced coil arrange can be free many, can selectively arrange coil and can not have influence on the transmission of charge efficiency and signal according to the structure of power brick.
Battery is the implementation method of equilibrium initiatively.As shown in Figure 1, the overtension of supposing No. 1 cell in the power brick C needs outside release portion energy, and No. 2 monomer battery voltages are crossed the low makeup energy that needs, at this moment optimal way is that energy with No. 1 battery cell is transferred on No. 2 battery cells, make and the electric voltage equalization of each battery cell in the power brick C utilize method of the present invention both can simply accomplish.As shown in Figure 5: at first battery management system B sends the request signal of signals collecting by all coils of coil in this magnetic field, and each battery cell in the power brick C and A-battery all send signals such as separately cell voltage, temperature according to the order that provides in advance separately successively to battery management system C.Battery management system is judged the battery cell overtension No. 1 by each signal that receives, and No. 2 battery cell brownouts.Then, battery management system sends No. 1 battery cell again to No. 2 some signals of battery cells charging to this magnetic field, and no matter each coil receives judges pipe earlier behind this signal own thing, if with oneself relevant relevant action of carrying out again.No. 1 battery cell receives and oneself needs the outwards instruction of charging, and No. 1 wireless controller switches to power supply state with being about to coil, and beginning outwards sends energy.And No. 2 battery cells are received the instruction of accepting charging, so No. 2 wireless controller switches to accepting state with coil, at this moment No. 2 battery cells just can receive the electric energy that No. 1 battery sends out.And this moment, because the signal instruction that receives is not related to the thing of oneself, other battery cell and A-battery all do not switch to accepting state with coil, so the energy of No. 1 battery is only received by No. 2 batteries at this moment, other coil in inherent this magnetic field of same time are not influenced.When the voltage of No. 1 battery drops to by wireless power when identical with the voltage of other battery cell in the power brick C, the wireless controller of No. 1 battery is closed coil, stop outside power supply, and the wireless controller of No. 2 battery cells detects and also coil is disconnected after not having rechargeable energy to send over.At last, the coil of all batteries sends signals such as separately cell voltage, temperature again successively to battery management system B, and battery management system B determines to need to carry out the charging action or carry out what kind of charging action by judging again.In like manner, the battery cell in the power brick can charge to the 12V A-battery, and the 12V A-battery also can be charged to each battery cell.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. one kind is utilized wireless charging to realize the initiatively method of equilibrium of new-energy automobile battery, it is characterized in that:
Step 1: battery management system sends the request signal of signals collecting to the electric field at wireless charging system place or all coils that are connected with battery in the magnetic field by the coil that is connected with battery management system;
Step 2: each battery cell in the power brick and A-battery send the signal of battery separately separately successively to battery management system according to the order that provides in advance;
Step 3: battery management system judges whether to need to carry out battery balanced action by each signal that receives:
If do not need to carry out battery balanced action, then battery balanced end;
Carry out battery balanced action if desired, then battery management system sends battery balanced instruction to the battery of needs discharges and needs the battery of charging, needs the battery of discharge to switch to outside wireless power state, needs the battery of charging to switch to the state of being recharged;
Step 4: after charging is finished, send equilibrium to battery management system and finish signal; And restart step 1.
2. the wireless charging that utilizes according to claim 1 is realized initiatively balanced method of new-energy automobile battery, it is characterized in that: each battery cell in the described power brick and A-battery send separately cell voltage, temperature signal to battery management system successively according to the order that provides in advance separately.
3. the wireless charging that utilizes according to claim 1 is realized the initiatively method of equilibrium of new-energy automobile battery, and it is characterized in that: the wireless charging coil circuit that connects with battery management system is identical with the resonance frequency of the wireless charging coil circuit that is connected with battery.
4. the wireless charging that utilizes according to claim 1 is realized the initiatively method of equilibrium of new-energy automobile battery, it is characterized in that: the battery that the battery of needs discharge maybe needs to charge is finished signal to battery management system transmission equilibrium.
5. the wireless charging that utilizes according to claim 1 is realized the initiatively method of equilibrium of new-energy automobile battery, it is characterized in that: when the voltage of the battery of needs discharges drops to by outside wireless power when identical with the voltage of other battery cell in the power brick, need the wireless controller of the battery of discharge that coil is closed, stop outside power supply, and also coil is disconnected after needing the wireless controller of the battery cell of charging to detect not have rechargeable energy to send over.
6. the wireless charging that utilizes according to claim 1 is realized the initiatively method of equilibrium of new-energy automobile battery, it is characterized in that: also comprise A-battery, battery cell in the power brick can charge to A-battery, and A-battery also can be charged to each battery cell.
7. realize the system of any described method of claim 1 to 6, it is characterized in that: it comprises battery management system, power brick, A-battery, the high-tension battery module of power brick for being composed in series by cell, each cell, battery management system and A-battery have a circuit that receives and launch radio energy and data command, this circuit comprises a microprocessor, imput output circuit and battery information Acquisition Circuit, series resonant circuit, and all coils is in same electric field or the magnetic field.
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Cited By (9)
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| CN103545900A (en) * | 2013-10-30 | 2014-01-29 | 深圳市航盛电子股份有限公司 | Wireless charging system and method |
| CN106786952A (en) * | 2017-01-04 | 2017-05-31 | 山东谦恒电子科技有限公司 | Active equalization control device and method |
| WO2018036165A1 (en) * | 2016-08-26 | 2018-03-01 | 华为技术有限公司 | Battery pack energy balancing device and system |
| CN108110832A (en) * | 2017-12-25 | 2018-06-01 | 上海电气集团股份有限公司 | A kind of battery core control circuit, battery and control method |
| CN108569276A (en) * | 2018-05-21 | 2018-09-25 | 清华大学 | Using wireless charging as the Series Hybrid-Power Vehicle control method of auxiliary power unit |
| CN110015163A (en) * | 2017-08-28 | 2019-07-16 | 三星电子株式会社 | Device and method for managing battery |
| CN110336338A (en) * | 2019-04-10 | 2019-10-15 | 重庆金康动力新能源有限公司 | Balance control system, method, equipment, vehicle, computer equipment and storage medium |
| CN110783974A (en) * | 2018-07-30 | 2020-02-11 | 巴莱诺斯清洁能源控股公司 | Cell and system for wireless balancing of battery cells |
| CN111786036A (en) * | 2019-04-04 | 2020-10-16 | 纳恩博（北京）科技有限公司 | Battery system and vehicle |
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| CN103545900A (en) * | 2013-10-30 | 2014-01-29 | 深圳市航盛电子股份有限公司 | Wireless charging system and method |
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| CN108569276A (en) * | 2018-05-21 | 2018-09-25 | 清华大学 | Using wireless charging as the Series Hybrid-Power Vehicle control method of auxiliary power unit |
| CN108569276B (en) * | 2018-05-21 | 2019-09-27 | 清华大学 | Using wireless charging as the Series Hybrid-Power Vehicle control method of auxiliary power unit |
| CN110783974A (en) * | 2018-07-30 | 2020-02-11 | 巴莱诺斯清洁能源控股公司 | Cell and system for wireless balancing of battery cells |
| CN111786036A (en) * | 2019-04-04 | 2020-10-16 | 纳恩博（北京）科技有限公司 | Battery system and vehicle |
| CN110336338A (en) * | 2019-04-10 | 2019-10-15 | 重庆金康动力新能源有限公司 | Balance control system, method, equipment, vehicle, computer equipment and storage medium |
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