CN103199587B - Wireless charging is utilized to realize the method and system of new energy car battery active equalization - Google Patents
Wireless charging is utilized to realize the method and system of new energy car battery active equalization Download PDFInfo
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- CN103199587B CN103199587B CN201310115905.9A CN201310115905A CN103199587B CN 103199587 B CN103199587 B CN 103199587B CN 201310115905 A CN201310115905 A CN 201310115905A CN 103199587 B CN103199587 B CN 103199587B
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Abstract
The invention provides a kind of method and system utilizing wireless charging to realize new energy car battery active equalization and data command transmission, system comprises battery management system, power brick, A-battery, power brick is the high-tension battery module be composed in series by cell, each cell, battery management system and A-battery have a circuit receiving 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 magnetic field.An energy transformation method for cheapness, the two-way active equalization of reliable and efficient power brick battery, and utilize the method to realize cell information to battery manager transmission and battery manager to the instruction of each battery cell transmission electric energy transfer.
Description
Technical field
The present invention relates to battery balanced field, particularly a kind of method and system utilizing the mode of wireless charging to reach the active equalization of battery object of new-energy automobile.
Background technology
Day by day in short supply along with petroleum resources, the development of new-energy automobile is more and more subject to the attention of Ge great depot.New-energy automobile refers to other energy automobiles all except gasoline, Diesel engine.Comprise fuel cell car, hybrid vehicle, hydrogen-powered vehicles and solar telephone etc.Battery is for new-energy automobile being important parts.On new forms of energy car, in order to obtain larger power, series-connected cell method usually can be adopted to form battery pack (or power brick).When to a Battery pack discharge and recharge, consider the inconsistency of each cell, balanced measure generally can be adopted to guarantee safety and stability.Equilibrium is exactly utilize electronic technology, and battery cell voltage deviation is remained in the scope of expection, thus ensures that each cell is not damaged when normal use.If do not carry out Balance route, along with the increase of charge and discharge cycles, each monomer battery voltage breaks up gradually, and useful life will reduce greatly.Battery balancedly can be divided into again passive equilibrium and active equalization two kinds, wherein passive equilibrium is referred to and is consumed by conductive discharge or other forms by the unnecessary electricity of cell high for voltage, the realization of passive equilibrium is simple, but there is certain unsafe factor, and is unfavorable for energy saving standard; Active equalization refers to and a part of electricity of high-tension cell is transmitted back to battery circuit by conversion equipment or is directly transferred in low pressure storage battery.Transformer is more commonly utilized to realize high-low pressure electrical isolation and electric energy conversion in the scheme of active equalization, but due to reasons such as material temperature are responsive, volume is large, weight is large, transformer be not suitable for very much the such temperature difference of automobile large, shake strong environment.The core component of the inventive method is a coil, contrast traditional transformer and all have absolute advantage in price, volume, weight etc., and utilize coil can also send data except wireless charging function can be realized, the information such as the voltage of cell, temperature wirelessly can also be sent to battery management system, more can realize orientation and the transmitted in both directions of electric energy.Some advantage above due to wireless charging can predict and play huge facilitation by the battery balanced development of new-energy automobile adding of wireless charging technology.
Summary of the invention
The technical problem to be solved in the present invention is the energy conversion device proposing a kind of cheapness, the two-way active equalization of reliable and efficient power brick battery, and utilizes this device to realize cell information to battery manager (BMS) transmission and battery manager (BMS) to the method for each battery cell transmission electric energy transfer instruction.
In order to solve problem in prior art, the invention provides a kind of method utilizing wireless charging to realize new energy car battery active equalization,
Step one: battery management system sends the request signal of signals collecting by all coils be connected with battery of coil in the electric field or magnetic field at wireless charging system place be connected with battery management system;
Step 2: each battery cell in power brick and A-battery send the signal of respective battery separately successively to battery management system according to the order provided in advance;
Step 3: battery management system judges whether to need to perform battery balanced action by each signal received:
If do not need to perform battery balanced action, then battery balanced end;
If need to perform battery balanced action, then battery management system sends battery balanced instruction to needing the battery of electric discharge and needing the battery of charging, needs the battery of electric discharge to be switched to outside wireless power state, needs the battery of charging to be switched to by charged state;
Step 4: after charging complete, sends balanced settling signal to battery management system; And restart step one.
As a further improvement on the present invention, each battery cell in described power brick and A-battery send respective cell voltage, temperature signal to battery management system successively according to the order provided in advance separately.
As a further improvement on the present invention, identical with the Wireless charging coil circuit that battery management system connects and the resonance frequency of Wireless charging coil circuit that is connected with battery.
As a further improvement on the present invention, need the battery of electric discharge or need the battery of charging to send balanced settling signal to battery management system.
As a further improvement on the present invention, when the voltage of the battery needing electric discharge drops to identical with the voltage of other battery cell in power brick by outside wireless power, the wireless controller of the battery of electric discharge is needed to be closed by coil, stop outwards 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 power brick can charge to A-battery, and A-battery also can be charged to each battery cell.
Realize the system of said method, it comprises battery management system, power brick, A-battery, power brick is the high-tension battery module be composed in series by cell, each cell, battery management system and A-battery have a circuit receiving 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 magnetic field.
The present invention is better to high-low pressure part isolation effect.Isolation inside traditional battery management system between high pressure and low-pressure section is a large problem always, even if employ the isolation voltage that various isolating chip and isolating transformer all can only reach several kilovolts, and the coil of wireless charging can at the distance transferring energy of several centimetres to several meters and signal, isolation voltage can be very easy to reach tens thousand of volt to tens million of volt.
Cost significantly reduces.What eliminate that various transformer, isolating chip and various high pressure resistant holding wire bring is that the cost of whole system reduces significantly.
Achieve the orientation transmission of electric energy.The wireless power and the signal transfer functions that make use of coil make the transmission of electric energy become very simple.Because the electric energy being in any one battery in same magnetic field can be powered to another or multiple specific battery, the very convenient orientation transmission that just can realize electric energy.
Achieve the wireless transmission of the signal such as cell voltage, temperature.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of battery equalization system of the present invention composition.
Fig. 2 is the wireless power principle of magnetic resonance mode.
Fig. 3 is the method utilizing wireless way for transmitting data.
Fig. 4 is the read method of the data of wireless transmission.
Fig. 5 is the workflow diagram of the active equalization of battery modules (power brick).
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
The invention provides a kind of method and system utilizing wireless charging to realize new energy car battery active equalization and data command transmission, system comprises battery management system, power brick, A-battery, power brick is the high-tension battery module be composed in series by cell, each cell, battery management system and A-battery have a circuit receiving 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 magnetic field.
Be illustrated in figure 1 system architecture diagram of the present invention.MCU in Fig. 1 on cell is the wireless controller of battery cell, part B is the battery management system (BMS) of new-energy automobile, C part is the high-tension battery module (power brick) be composed in series by cell, and 12V battery is the storage battery that automobile low-voltage electrical appliance is powered.The circuit with same concussion frequency that in figure, each cell, battery management system and A-battery are all made up of coil and electric capacity by one, this circuit comprises microprocessor (MCU), some imput output circuits and a battery information Acquisition Circuit, it both can switching coil charging and by electricity condition, can also transmit and receive data (as Fig. 3).
Be illustrated in figure 2 the principle of wireless power.When a coil and inductance and a capacitances in series, the frequency relation of the oscillating circuit that they form is
if be arranged in two coils in magnetic field, when same frequency adjusted to by two coils, resonate in other words in a specific frequency, they just can exchange energy each other.From tradition reason in theory, although electric energy can be converted into the electromagnetic wave by invisible Medium Propagation, realize the wireless transmission of electric energy, electromagnetic wave is to all the winds radiation, and energy can scatter and disappear, so wireless charging efficiency is not high in a large number.The breakthrough part of this method is to make use of " catching " electromagnetic method, namely make use of physical " resonance " principle---the object energy high efficiency of transmission energy that two vibration frequencies are identical.So present method solves the problem of wireless charging inefficiency, the efficiency making power brick utilize wireless power to realize active equalization is guaranteed.
Be illustrated in figure 3 the method for wireless signal transmission.When one utilizes fixed frequency to be input to as the square-wave signal of carrier wave the capacitor and inductor radiating circuit having same frequency, this signal can wirelessly be had the receiving circuit of same concussion frequency to receive, and so just can reach the object of radio communication.
Be illustrated in figure 3 the coil that two have a certain identical built-in oscillation frequency, coil is sent to when a coil utilizes this frequency to become modulating wave as the signal that carrier wave will send, after inductance and electric capacity, this modulation signal is just become the signal with sine wave characteristics and is gone out by wireless transmission, and another coil in this magnetic field will obtain an identical signal with sine wave characteristics.The transmission realizing signal in a certain magnetic field can be realized by the method.Utilize this wireless signal transmission method can transmit monomer battery voltage signal, battery temperature signal, the control signal of battery management system, the charging signals etc. of A-battery.
Be illustrated in figure 4 the recognition methods of wireless data.When the square-wave modulation signal of transmitting terminal is high, the signal that receiving terminal coil receives is the sine wave that one section of amplitude is higher, and when the square-wave modulation signal of transmitting terminal is low, the signal that receiving terminal coil receives is the sine wave that one section of amplitude is lower.The signal recognition method of receiving terminal coil for terminate as one for starting to next trailing edge using a trailing edge, in a byte rising edge to time of next trailing edge long be " 1 ", what the time was short is " 0 ".The data segment of " 0 " and " 1 " can form data, and these data both can transmit battery cell information also can transmit BMS charging instruction.
The implementation method of wireless charging:
Wireless charging method for the active equalization of battery in this method can bag field coupled, the wireless charging mode such as electromagnetic induction and magnetic resonance.Wherein the cardinal principle of way of electromagnetic induction is one and utilizes electromagnetic induction principle to carry out the equipment charged, and is similar to voltage device.Respectively have a coil at transmitting terminal and receiving terminal, transmitting terminal coil is connected with AC power and produces electromagnetic signal, and the electromagnetic signal of the coil-induced transmitting terminal of receiving terminal thus generation current are powered to power consumption equipment; The principle of the mode of magnetic resonance is identical with the resonance principle of sound.Arrange the tuning fork that vibration frequency is identical, a sounding, other also can resonance sounding.Equally, be arranged in the coil of the identical vibration frequency in magnetic field, also can from one to another power supply.Relative to way of electromagnetic induction, magnetic resonance mode can be extended transmission distance.And magnetic resonance mode is different from way of electromagnetic induction, fit like a glove without the need to making the position between coil.The coil of the active equalization of battery of such use magnetic resonance mode arrange can be free many, selectively can to arrange coil and charge efficiency and Signal transmissions can not be had influence on according to the structure of power brick.
The implementation method of active equalization of battery.As shown in Figure 1, suppose that the overtension of No. 1 cell in power brick C needs outside release portion energy, and No. 2 too low makeup energy that need of monomer battery voltage, at this moment optimal way is on No. 2 battery cells by the Energy Transfer of No. 1 battery cell, make the electric voltage equalization of each battery cell in power brick C, utilize method of the present invention both can simply accomplish.As shown in Figure 5: first battery management system B sends the request signal of signals collecting to all coils in this magnetic field by coil, and each battery cell in power brick C and all respective order according to providing in advance of A-battery send the signals such as respective cell voltage, temperature to battery management system C successively.Battery management system judges No. 1 battery cell overtension by each signal received, and No. 2 battery cell brownouts.Then, battery management system again sends No. 1 battery cell and to charge some signals to No. 2 battery cells to this magnetic field, and each coil first judges pipe no matter oneself thing after receiving this signal, perform relevant action again if relevant with oneself.No. 1 battery cell receives the instruction oneself needing outwards charging, and the wireless controller of No. 1 is switched to power supply state with by coil, starts outwards to send energy.And No. 2 battery cells receive the instruction accepting charging, so coil is switched to accepting state by the wireless controller of No. 2, at this moment No. 2 battery cells just can receive the electric energy that No. 1 battery sends out.And now, because the signal instruction received is not related to the thing of oneself, coil is not all switched to accepting state by other battery cell and A-battery, so now the energy of No. 1 battery, only by No. 2 battery receptacle, does not affect other coil in this magnetic field inherent of same time.When the voltage of No. 1 battery drops to identical with the voltage of other battery cell in power brick C by wireless power, coil is closed by the wireless controller of No. 1 battery, stop outwards power supply, and the wireless controller of No. 2 battery cells detect do not have rechargeable energy to send over after also coil is disconnected.Finally, the coil of all batteries sends the signals such as respective cell voltage, temperature to battery management system B again successively, and battery management system B is again by judging that decision need not need to perform charging action or perform what kind of charging action.In like manner, the battery cell in power brick can charge to 12V A-battery, and 12V A-battery also can be charged to each battery cell.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. utilize wireless charging to realize a method for new energy car battery active equalization, it is characterized in that:
Step one: battery management system sends the request signal of signals collecting by all coils be connected with battery of coil in the electric field or magnetic field at wireless charging system place be connected with battery management system;
Step 2: each battery cell in power brick and A-battery send the signal of respective battery separately successively to battery management system according to the order provided in advance;
Step 3: battery management system judges whether to need to perform battery balanced action by the signal of the respective battery that each battery cell of receiving and A-battery send:
If do not need to perform battery balanced action, then battery balanced end;
If need to perform battery balanced action, then battery management system sends battery balanced instruction to needing the battery of electric discharge and needing the battery of charging, the battery of electric discharge is needed to be switched to outside wireless power state, the battery of charging is needed to be switched to by charged state, battery cell in power brick can charge to A-battery, and A-battery also can be charged to each battery cell;
Step 4: after charging complete, sends balanced settling signal to battery management system; And restart step one.
2. the method utilizing wireless charging to realize new energy car battery active equalization according to claim 1, is characterized in that: each battery cell in described power brick and A-battery send respective cell voltage, temperature signal to battery management system successively according to the order provided in advance separately.
3. the method utilizing wireless charging to realize new energy car battery active equalization according to claim 1, is characterized in that: identical with the Wireless charging coil circuit that battery management system connects and the resonance frequency of Wireless charging coil circuit that is connected with battery.
4. the method utilizing wireless charging to realize new energy car battery active equalization according to claim 1, is characterized in that: the battery of needs electric discharge or the battery of needs charging send balanced settling signal to battery management system.
5. the method utilizing wireless charging to realize new energy car battery active equalization according to claim 1, it is characterized in that: when the voltage of the battery of needs electric discharge drops to identical with the voltage of other battery cell in power brick by outside wireless power, the wireless controller of the battery of electric discharge is needed to be closed by coil, stop outwards 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. realize the system of method described in claim 1 to 5 any one, it is characterized in that: it comprises battery management system, power brick, A-battery, power brick is the high-tension battery module be composed in series by cell, each cell, battery management system and A-battery have a circuit receiving 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 magnetic field.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107785943B (en) | 2016-08-26 | 2020-02-21 | 华为技术有限公司 | Device and system for balancing energy of battery pack |
| 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 |
| KR102399604B1 (en) * | 2017-08-28 | 2022-05-18 | 삼성전자주식회사 | Apparatus and system for managing battery |
| 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 |
| 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 |
| RS62308B1 (en) * | 2018-07-30 | 2021-09-30 | Belenos Clean Power Holding Ag | Wireless balancing unit and system for a battery cell |
| 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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| CN201910626U (en) * | 2010-08-27 | 2011-07-27 | 王开 | Battery charging management system adopting noncontact energy transfer mode |
| CN202309118U (en) * | 2011-10-08 | 2012-07-04 | 上海锂曜能源科技有限公司 | Transformer scan chain type storage battery equalizing circuit |
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| JP4940010B2 (en) * | 2007-04-26 | 2012-05-30 | 株式会社日立製作所 | Transmitter and radio system using the same |
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| CN201910626U (en) * | 2010-08-27 | 2011-07-27 | 王开 | Battery charging management system adopting noncontact energy transfer mode |
| CN202309118U (en) * | 2011-10-08 | 2012-07-04 | 上海锂曜能源科技有限公司 | Transformer scan chain type storage battery equalizing circuit |
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