CN103138316A - Electric car charger - Google Patents

Electric car charger Download PDF

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Publication number
CN103138316A
CN103138316A CN2011103896686A CN201110389668A CN103138316A CN 103138316 A CN103138316 A CN 103138316A CN 2011103896686 A CN2011103896686 A CN 2011103896686A CN 201110389668 A CN201110389668 A CN 201110389668A CN 103138316 A CN103138316 A CN 103138316A
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CN
China
Prior art keywords
circuit
charging
electric car
control unit
car charger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103896686A
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Chinese (zh)
Inventor
路石超
路建统
王锁红
罗浩
罗芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weihai PTC International Co Ltd
Original Assignee
Weihai PTC International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weihai PTC International Co Ltd filed Critical Weihai PTC International Co Ltd
Priority to CN2011103896686A priority Critical patent/CN103138316A/en
Publication of CN103138316A publication Critical patent/CN103138316A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of battery charging and management, in particular to an electric car charger of an electric car battery pack, wherein the electric car charger can achieve charging management on the electric car storage battery pack. The electric car charger comprises a control unit, charging modules and temperature sensors, and is characterized in that the control unit is connected with the more than two charging modules through serial communication interfaces and is connected with the more than two temperature sensors through serial communication interfaces, and the temperature sensors are used for measuring battery temperature, and the more than two charging modules and the more than two temperature sensors correspond one to one. The electric car charger has the remarkable advantages of being simple in circuit and low in cost. Meanwhile, the match with the electric car charger and a whole control system is easy to achieve, the electric car charger can be used as a vehicle-mounted charger conveniently, the electric car charger is convenient to popularize and apply, the electric car charger can be produced in a mass mode, and the like.

Description

A kind of electric car charger
 
Technical field
The present invention relates to battery charging and administrative skill field, specifically a kind of electric car charger that can realize the accumulator of electric car group is carried out the batteries of electric automobile group of Charge Management.
Background technology
The electrical source of power of electric automobile generally adopts a plurality of cell batteries composition battery pack that is together in series, to reach the purpose that DC high-voltage power supply is provided to vehicle electric motor.when the batteries that is connected in series is charged, because the electrochemical properties of each cell in battery pack there are differences, when some batteries are filled electricity, other batteries are still needed and are continued charging, this makes the battery phenomenon of overcharging that is filled electricity, and the battery of those long-term undercharges, capacity loss, internal resistance increases, especially through repeatedly discharge and recharge the cycle after, tend to occur the individual cell heating, bulge, until damage, the situation that can't normally discharge and recharge, in order to address the above problem, the battery pack of electric automobile is wanted the setting battery management devices usually, every cell is carried out equalizing charge, whole charging process is monitored, and pass through communication line, the running parameter of each cell is uploaded to the upper control device, manage concentratedly and process by host computer, send and report to the police and control signal.
Generally all adopt the split-type structural of a high-voltage charger and a battery charging management device in existing charging and management devices, wherein the battery charging management device is in the isoparametric while of voltage, temperature of each battery of Sample by make rounds, should control equalization charging circuit, again the system parameters that monitors be sent to whole-control system.In such system configuration, owing to having adopted the high-pressure series charging, damage battery to be charged for fear of overcharging, just must carry out equalizing charge to each cell when charging normal controls, cause system configuration complicated, cost is higher, poor reliability, and cause the electric energy of consuming cells due to equalizing charge.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, proposed a kind of circuit structure simple, production cost is low, and is low in energy consumption, is easy to the charger with the batteries of electric automobile group of whole-control system coupling.
The present invention can reach by following measures:
A kind of electric car charger, be provided with control unit, charging module and temperature sensor, it is characterized in that control unit is connected with charging module independent of each other more than two respectively through serial communication interface, control unit is connected with two above temperature sensors respectively through serial communication interface, described two above charging modules are corresponding one by one with two above temperature sensors.
Be provided with single-chip microcomputer, display module and alarm module described in the present invention in control unit, display module is connected with single-chip microcomputer respectively with alarm module, also is provided with the serial communication interface that is connected for vehicle circuitry in described control unit.
be provided with the power circuit that is used to each charging module for power supply described in the present invention in charging module, the two ends of each self-corresponding battery are taken from its input, be used for to realize with the control unit exchanges data and control the single chip circuit of each charging module operating state, power sense circuit for detection of external power source access situation, the address encoding circuit that is used for mark charging module address, for the buffer circuit that prevents from crosstalking between circuit, be used for the charging circuit to charge in batteries to be charged, and the voltage that is used for gathering battery to be charged, the voltage detecting circuit of current information and current detection circuit.
Temperature sensor described in the present invention for detection of the temperature of corresponding with every group of charging module respectively battery pack to be charged, and by serial communication bus, directly sends to control unit to the battery temperature data that collect.
Two above charging modules described in the present invention have respectively the geocoding that differs from one another, and this geocoding is set in advance, and two above charging modules are carried out mark in order.
The present invention in use, control unit is connected with whole-control system by serial communication interface.After automobile power supply switch was opened, whole-control system powered up to control unit by the socket of serial line interface, control unit work, and notify each coupled charging module, make it be in the mode of operation that monitors battery discharge.This moment is owing to not plugging ac charging power supply, the charging circuit of each charging module is not worked, and by the single chip circuit in charging module separately, with the cell voltage of signal acquisition circuit input, address number together with oneself reports to control unit by serial communication bus.Control unit gathers coupled temperature sensor by serial communication interface, and described temperature sensor is corresponding one by one with two above charging modules, thereby obtains the temperature of each battery in battery pack.Control unit is the temperature parameter of the voltage parameter of each charging module that obtains, each battery and in addition comprehensive from the discharge total current of whole-control system and automobile rotational speed parameter, discharge condition and each energy content of battery state current to battery judge, send battery management information to whole-control system, and drive display module output relevant information, send in case of necessity warning message.After automobile stopped, the power supply of control unit was switched off, and control unit quits work, and at this moment, the power sense circuit in each charging module detects the external power source situation, with making module separately enter the power-consumption standby state, so that the energy consumption of conserve batteries.In the situation that automobile power source is closed, if plug ac charging power supply, control unit gets electric work, and each charging module enters the battery charger operation mode.Control unit begins by serial bus interface, the temperature of each cell in the itinerant monitor system battery pack, the charge parameter of each charging module of itinerant monitor system.In the battery charger operation mode, each charging module charges to coupled battery to be charged by charging circuit separately, and charging process is independent of one another, and the collection of information and observation process are also independent of one another, many group charging work are independent of each other, and therefore need not carry out equilibrium and control.Enter at first the charging module of floating punching, its single chip circuit enters the low-power consumption standby mode, and with this charging voltage, charging current, in the charging interval, the parameters such as charged state together with the address number of oneself, are sent into control unit by serial communication bus.Control unit judges instant playback or warning according to these parameters to battery charging process and each battery status.In addition, after automobile main power is opened, also to send battery management information to whole-control system, drive display module, send in case of necessity warning message.for example in charging process, when certain charging module detects abnormal charging voltage or electric current, if perhaps certain charging module receives the information that control unit is sent by universal serial bus, notify the temperature of its cell that is charging to surpass higher limit, this charging module will stop charging voluntarily, withdraw from charging modes, enter the low-power consumption standby mode, and charge parameter and charged state are sent to control unit, by control unit, charged state is carried out instant playback and reported to the police and process, control unit also can get off these reference records, after opening Deng automobile power supply switch, show again and report to the police, and send battery management information to whole-control system.
The present invention compared with prior art, have the following advantages: (1) is owing to charging respectively to each cell, isolation mutually, trouble free service, do not need balancing control circuit, simplified circuit structure, add and adopted the charging of low pressure small-power, reduced the high voltage device in the charging circuit, system reliability improve; (2) charger and battery manager are the integrated design, and there is no equalizing circuit, have saved element, have reduced line, have reduced the overall cost of system; (3) when the control unit mains switch is closed, the single-chip microcomputer of each cell is in little power consumption power down mode, the consumption of having saved battery power; (4) circuit is simple, and cost is low, adopts the serial communication interface exchange message of standard, and the coupling of whole-control system easily realizes, can use easily easy to utilize and batch production as onboard charger.
Description of drawings:
Accompanying drawing 1 is a kind of structural representation of the present invention.
Accompanying drawing 2 is structural representations of charging module in the present invention.
Reference numeral: control unit 1, charging module 2, temperature sensor 3, single chip circuit 4, charging circuit 5, geocoding interface circuit 6, power circuit 7, voltage detecting circuit 8, current detection circuit 9, buffer circuit 10, level shifting circuit 11, power sense circuit 12.
Embodiment:
The present invention is described further below in conjunction with drawings and Examples.
Accompanying drawing 1 provides a kind of enforcement view of the present invention, so that the battery pack that is comprised of 4 cells is charged as example, is illustrated in the drawings.
In the present embodiment, the CAN bus interface is adopted in the communication of control unit 1 and whole-control system, is conducive to like this coupling with various control system of electric automobile.485 bus interface are adopted in communication between control unit 1 and each charging module 2, to reach the purpose that reduces costs; Single bus interface is adopted in communication between the temperature sensor 3 of control unit 1 and each cell, has reduced like this quantity of control unit 1 to the connecting line between each cell; The alternating current input power supplying of each charging module 2 adopts the single phase poaer supply input, has reduced the cost of the charging circuit in the charging module.
In specific implementation process, every group of battery to be charged has a temperature sensor 3, here adopt the digital temperature sensor DS18B20 of Dallas company, this installation of sensors is at the shell of battery, all the sensors all hangs on monobus, and is directly connected to the single bus interface of control unit 1, and not through separately charging module 2, greatly reduce connecting line quantity, reduced the line complexity.
In specific implementation process, the single-chip microcomputer in control unit 1, the preferential automotive grade low-power scm C8051F580 with CAN controller that adopts, and by CAN transponder chip TJA1050, link the CAN bus interface, realize serial communication with whole-control system; General single-chip microcomputer does not all have single bus interface, adopts the way of software simulation single bus interface here, in conjunction with the supporting digital temperature sensor of each cell, gather the temperature information of each cell; Single-chip microcomputer C8051F580 has the UART interface, by adopting level shifting circuit MAX485, is translated into 485 bus level, realizes the serial communication with the next charging module 2.
As shown in Figure 2, in specific implementation process, be provided with single chip circuit 4 in charging module 2, charging circuit 5, geocoding interface circuit 6, power circuit 7, voltage detecting circuit 8, current detection circuit 9, buffer circuit 10, level shifting circuit 11, and power sense circuit 12.
The charging circuit 5 of each charging module 2 wherein, adopt ripe, based on the syllogic charging control mode of IC chip TL494.Single chip circuit 4 in charging module 2, the preferential automotive grade low-power scm C8051F530 that adopts, this single-chip microcomputer be in charging module 2 the major control chip, except having inner ROM, RAM, crystal oscillator, reference voltage source outside the functional circuit such as reset, also has analog-to-digital conversion input interface and UART serial communication interface, the level shifting circuit 11 of 485 buses adopts the MAX485 chip, and buffer circuit 10 adopts photoelectrical coupler TL521.The structure of battery voltage detection circuit 8 adopts simple precision resistance bleeder circuit.Battery charge testing circuit 9 adopts accurate power resistor sampling, then passes through the amplification of single supply operational amplifier LM358, inputs to single chip circuit 4.Geocoding interface circuit 6 adopts five binary system hardware selected on-off circuits, and the address of each charging module 2 is arranged in order from 1 to N, and repeated encoding can not be arranged, and in the present embodiment, five binary address codings can have at most 32 not repeats to address (RA).
the analog-to-digital conversion interface of single-chip microcomputer inside, with voltage detecting circuit 8, the analog signal of current detection circuit 9 inputs, convert digital quantity to, no matter be at charge mode or discharge mode, in the service routine that the serial communication that response is sent by the upper single-chip microcomputer in control unit 1 is interrupted, single chip circuit 4 in each charging module 2 compares the geocoding of the address call data of receiving with oneself, if equate, the cell voltage that gets by the analog-to-digital conversion measurement and battery current data, together with oneself geocoding, send back to the upper single-chip microcomputer in control unit 1, if instead unequal, ignore the request of control unit 1, proceed to detect the work of cell voltage and battery current, after the car load power remove, the power supply of upper single-chip microcomputer also is turned off, single-chip microcomputer in each charging module 2 records current parameter, enter little power consumption power saving mode, until after the car load power supply opening, the power up of upper single-chip microcomputer, in each charging module 2, single-chip microcomputer enters normal operating state again.
The present invention compared with prior art, have the following advantages: (1) is owing to charging respectively to each cell, isolation mutually, trouble free service, do not need balancing control circuit, simplified circuit structure, add and adopted the charging of low pressure small-power, reduced the high voltage device in the charging circuit, system reliability improve; (2) charger and battery manager are the integrated design, and there is no equalizing circuit, have saved element, have reduced line, have reduced the overall cost of system; (3) when the control unit mains switch is closed, the single-chip microcomputer of each cell is in little power consumption power down mode, the consumption of having saved battery power; (4) circuit is simple, and cost is low, adopts the serial communication interface exchange message of standard, and the coupling of whole-control system easily realizes, can use easily easy to utilize and batch production as onboard charger.

Claims (5)

1. electric car charger, be provided with control unit, charging module and temperature sensor, it is characterized in that control unit is connected with charging module independent of each other more than two respectively through serial communication interface, control unit is connected with two above temperature sensors respectively through serial communication interface, and described two above charging modules are corresponding one by one with two above temperature sensors.
2. a kind of electric car charger according to claim 1, it is characterized in that being provided with in described control unit single-chip microcomputer, display module and alarm module, display module is connected with single-chip microcomputer respectively with alarm module, also is provided with the serial communication interface that is connected for vehicle circuitry in described control unit.
3. a kind of electric car charger according to claim 1, it is characterized in that being provided with in described charging module the power circuit that is used to each charging module for power supply, be used for to realize with the control unit exchanges data and control the single chip circuit of each charging module operating state, power sense circuit for detection of external power source access situation, the address encoding circuit that is used for mark charging module address, for the buffer circuit that prevents from crosstalking between circuit, be used for the charging circuit to charge in batteries to be charged, and the voltage that is used for gathering battery to be charged, the voltage detecting circuit of current information and current detection circuit.
4. a kind of electric car charger according to claim 1, is characterized in that described temperature sensor adopts digital temperature sensor.
5. a kind of electric car charger according to claim 1, is characterized in that described two above charging modules, has respectively the geocoding that differs from one another.
CN2011103896686A 2011-11-30 2011-11-30 Electric car charger Pending CN103138316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103896686A CN103138316A (en) 2011-11-30 2011-11-30 Electric car charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103896686A CN103138316A (en) 2011-11-30 2011-11-30 Electric car charger

Publications (1)

Publication Number Publication Date
CN103138316A true CN103138316A (en) 2013-06-05

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Application Number Title Priority Date Filing Date
CN2011103896686A Pending CN103138316A (en) 2011-11-30 2011-11-30 Electric car charger

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105304018A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Interaction display screen control circuit
CN105564351A (en) * 2016-01-27 2016-05-11 北京汽车股份有限公司 Automobile power supply control method, CAN interface processing device and control system
DE102015112349A1 (en) 2015-07-29 2017-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Loading device for a motor vehicle
CN108832206A (en) * 2018-06-21 2018-11-16 重庆国翰能源发展有限公司 A kind of battery monitoring device for energy storage heap

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106394272B (en) * 2015-07-29 2019-11-26 保时捷股份公司 Charging unit for motor vehicles
DE102015112349A1 (en) 2015-07-29 2017-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Loading device for a motor vehicle
CN106394272A (en) * 2015-07-29 2017-02-15 保时捷股份公司 Charging apparatus for a motor vehicle
US10099565B2 (en) 2015-07-29 2018-10-16 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Charging apparatus for a motor vehicle
CN105304018A (en) * 2015-11-13 2016-02-03 苏州扬佛自动化设备有限公司 Interaction display screen control circuit
CN105564351A (en) * 2016-01-27 2016-05-11 北京汽车股份有限公司 Automobile power supply control method, CAN interface processing device and control system
CN108832206A (en) * 2018-06-21 2018-11-16 重庆国翰能源发展有限公司 A kind of battery monitoring device for energy storage heap
CN108832206B (en) * 2018-06-21 2020-12-04 重庆国翰能源发展有限公司 Battery monitoring device for energy storage stack

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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130605

C02 Deemed withdrawal of patent application after publication (patent law 2001)