CN206834282U - A kind of cell management system of electric automobile - Google Patents

A kind of cell management system of electric automobile Download PDF

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Publication number
CN206834282U
CN206834282U CN201720568221.8U CN201720568221U CN206834282U CN 206834282 U CN206834282 U CN 206834282U CN 201720568221 U CN201720568221 U CN 201720568221U CN 206834282 U CN206834282 U CN 206834282U
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CN
China
Prior art keywords
electric automobile
batteries
controller
connects
circuit
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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.)
Expired - Fee Related
Application number
CN201720568221.8U
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Chinese (zh)
Inventor
王新霞
王党树
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Xian University of Science and Technology
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Xian University of Science and Technology
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Priority to CN201720568221.8U priority Critical patent/CN206834282U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a kind of cell management system of electric automobile, including controller and multiple management modules for being managed independently to every batteries in batteries of electric automobile group, management module includes communication isolation circuit, battery monitor, temperature observation circuit, equalizing circuit and relay control circuit, the input of controller is terminated with the current collection circuit for detecting bus current in the batteries of electric automobile group, and the output of controller is terminated with host computer, memory and warning circuit.The utility model is using distributed battery management structure, every batteries in batteries of electric automobile group are managed independently, voltage, electric current and temperature in monitoring batteries of electric automobile group per batteries in real time, the safety and reliability of management system is improved, extends the service life of battery pack, realizes effective management to battery pack, using easy to operate, practical, using effect is good, is easy to promote the use of.

Description

A kind of cell management system of electric automobile
Technical field
The utility model belongs to technical field of battery management, and in particular to a kind of cell management system of electric automobile.
Background technology
Car ownership continues to increase, and the non-renewable resources such as oil are reduced increasingly, in the today for advocating Green Travel, are opened New-energy automobile, especially electric automobile are sent out, into the common recognition and wind vane of major car manufactures, many countries are even more will be dynamic The research of power battery has risen to national energy hierarchy of strategy.Lithium ion battery advantage compared with other electrokinetic cells is numerous, This is also the reason for electric automobile is gradually from lithium ion battery as electrokinetic cell.
Due to extensive use of the lithium ion battery in each electronic product such as all kinds of mobile phones, Chinese lithium battery system has been promoted The continuous development of industry is made, international paces have substantially been caught up with terms of the manufacturing of lithium battery.The voltage of cell and Energy can not possibly have greatly improved in a short time, and therefore, existing scheme is usually cell to be connected in groups to provide Electric energy, the shortcomings which can overcome monomer battery voltage and inadequate energy, suitable operating voltage is provided for electric automobile And power output.But voltage, internal resistance, capacity etc. have inconsistency in batch production process due to battery, therefore When cell is concatenated into battery pack, it is necessary to effectively be managed battery pack, solve the inconsistence problems of battery pack, this It is significant to the service life of extension battery pack.Solves the consistency problem of battery pack, mainly according to battery management Parameters during the lithium battery group work that system real-time monitors, are then recognized to the parameter of collection, and by effective What Balance route algorithm was realized.With the widely using in electric automobile industry of lithium ion battery, rational battery is designed Management system also has highly important influence to the performance of electric automobile.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided a kind of electronic Automobile batteries management system, it is simple in construction, reasonable in design, structure is managed using distributed battery, to the often economize on electricity in battery pack Pond is managed independently, in real time monitor battery pack in per batteries voltage, electric current and temperature, prevent every batteries overcharge and Cross and put, improve the safety and reliability of management system, extend the service life of battery pack, realize effective pipe to battery pack Reason, use is easy to operate, practical, and using effect is good, is easy to promote the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is:A kind of batteries of electric automobile management system System, it is characterised in that:Including controller and multiple it is used to manage every batteries in batteries of electric automobile group independently Management module, the management module include be used for monitor the cell voltage that often economized on electricity in batteries of electric automobile group battery monitor and with What the controller output end connected be used to control in the batteries of electric automobile group per batteries charging and discharging circuit break-makes after Electrical equipment control loop, communication isolation circuit, the input of the battery monitor are connected between the controller and battery monitor It is terminated with for monitoring per the temperature observation circuit of batteries temperature in the batteries of electric automobile group, the battery monitor Output is terminated with for the equalizing circuit to carrying out Balance route in the batteries of electric automobile group per batteries, the controller Input be terminated with current collection circuit for detecting bus current in the batteries of electric automobile group, the controller it is defeated Go out to be terminated with host computer, memory and warning circuit.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The communication isolation circuit include inductance L1, Inductance L2, inductance L3 and inductance L4, the battery monitor are that chip LTC6803, the chip LTC6803 SCLK pins pass through Inductance L1 connects with the controller, and the SCKI pins of the chip LTC6803 connect through inductance L2 with the controller, described Chip LTC6803 SDO pins connect through inductance L3 with the controller, and the CSBI pins of the chip LTC6803 are through inductance L4 connects with the controller.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:It is equal that the temperature observation circuit includes model Amplifier U1 and amplifier U2, the in-phase input end of the amplifier U1 for LT6004LMSB connect with electric capacity C1 one end, The other end of the electric capacity C1 divides two-way, connects all the way through electric capacity C2 with power end VREF, another way ground connection, the amplifier U1 Reverse input end divide two-way, the output end with amplifier U1 connects all the way, and another way connects with thermistor R1 one end, institute The other end for stating thermistor R1 connects with battery monitor;The in-phase input end of the amplifier U2 and power end VREF phases Connect, the reverse input end of the amplifier U2 divides two-way, and the output end with amplifier U2 connects all the way, another way and thermistor R2 one end connects, and the other end of the thermistor R2 connects with battery monitor.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The current collection circuit includes chip ACS712, the VIOUT pins of the chip ACS712 connect with the controller.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The relay control circuit includes relay Device K1, the end of wiring 1 of the relay K1 connect with triode Q1 colelctor electrode, the end of wiring 2 and the 5V electricity of the relay K1 Source connects, and a stationary contact of the relay K1 connects with charge circuit, another stationary contact of the relay K1 with Charge circuit connects, and the grounded emitter of the triode Q1, the triode Q1 base stages are through resistance R3 and the controller phase Connect.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The controller is STM32 family chips.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The output end of the controller is further connected with scattered Thermal.
A kind of above-mentioned cell management system of electric automobile, it is characterised in that:The heat abstractor is fan
The utility model has advantages below compared with prior art:
1st, it is of the present utility model simple in construction, reasonable in design, realize and using easy to operate.
2nd, the utility model manages structure using distributed battery, and every batteries in battery pack are managed independently, Voltage and current in battery pack per batteries is monitored by battery monitor and current monitoring circuit in real time, and passes through relay Control circuit prevents overcharging and putting excessively for every batteries, realizes the equilibrium effectively management to battery pack, solves battery pack and differ It is the problem of cause, significant to the service life of extension battery pack.
3rd, the utility model monitors the temperature per batteries in battery pack by temperature observation circuit in real time, prevents temperature mistake Height damages to battery, and produces other danger, improves the safety and reliability of management system, practical, is easy to Promote the use of.
In summary, the utility model is simple in construction, reasonable in design, structure is managed using distributed battery, to electronic vapour Every batteries in car battery pack are managed independently, monitor voltage, electric current in batteries of electric automobile group per batteries in real time And temperature, overcharging and putting excessively for every batteries is prevented, the safety and reliability of management system is improved, extends making for battery pack With the life-span, effective management to battery pack is realized, use is easy to operate, practical, and using effect is good, is easy to promote the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit connecting relation figure of the utility model battery monitor and controller.
Fig. 3 is the circuit theory diagrams of the utility model temperature observation circuit.
Fig. 4 is the circuit theory diagrams of the utility model current collection circuit.
Fig. 5 is the circuit theory diagrams of the utility model relay control circuit.
Description of reference numerals:
1-controller;2-management module;3-current collection circuit;
4-temperature observation circuit;5-battery monitor;6-communication isolation circuit;
7-equalizing circuit;8-relay control circuit;9-host computer;
10-memory;11-warning circuit;12-heat abstractor.
Embodiment
As shown in figure 1, the utility model include controller 1 and it is multiple be used for every batteries in batteries of electric automobile group The management module 2 managed independently, the management module 2 include being used to monitor the cell voltage that often economizes on electricity in batteries of electric automobile group Battery monitor 5 and what is connected with the output end of controller 1 be used to control in the batteries of electric automobile group per batteries The relay control circuit 8 of charging and discharging circuit break-make, communication isolation circuit is connected between the controller 1 and battery monitor 5 6, the input of the battery monitor 5 is terminated with for monitoring the temperature prison in the batteries of electric automobile group per batteries temperature Slowdown monitoring circuit 4, the output of the battery monitor 5 are terminated with being used for carrying out equilibrium in the batteries of electric automobile group per batteries The equalizing circuit 7 of control, the input of the controller 1 are terminated with for detecting bus current in the batteries of electric automobile group Current collection circuit 3, the output of the controller 1 are terminated with host computer 9, memory 10 and warning circuit 11.
Every batteries in batteries of electric automobile group are managed independently by management module 2, according to electric automobile electricity The number of battery sets the number of management module 2 in the group of pond.Battery monitor 5 monitors often economized on electricity in batteries of electric automobile group in real time The voltage in pond, prevent from over-charging of battery and cross to put, monitored in real time by temperature observation circuit 4 in batteries of electric automobile group per batteries Temperature, prevent temperature is too high from being damaged to battery, and produce that other are dangerous, batteries of electric automobile group effectively supervised Survey, overcharge or cross cut-out in time when putting by appearance of the control relay circuit 3 per batteries in batteries of electric automobile group and fill Electrical circuit or discharge loop;Monitor the bus current of batteries of electric automobile group in real time by current monitoring circuit 3, realize to electronic Effective management of automobile batteries group, solves the problems, such as that battery pack is inconsistent, has to the service life for extending battery pack important Meaning.
In the present embodiment, the controller 1 is STM32 family chips.
During actual use, battery management system needs data to be processed more, it is desirable to which controller 1 has certain data processing Ability:Controller 1 needs to carry out SPI communication as main frame and battery monitor 5, the data received and dispatched during ensureing SPI communication with And be sent to battery monitor 5 order it is errorless;Need to send to host computer 9 substantial amounts of data in time by serial ports and carry out Display;Controller 1 needs substantial amounts of data are timely transmitted to memory 10 by serial ports to be stored;Controller 1 needs to locate The instruction of reason is more, it is desirable to which controller 1 has higher working frequency, therefore, as shown in Fig. 2 controller 1 uses chip STM32F103VCT6。
As shown in Fig. 2 in the present embodiment, the communication isolation circuit 6 includes inductance L1, inductance L2, inductance L3 and inductance L4, the battery monitor 5 are chip LTC6803, and the SCLK pins of the chip LTC6803 are through inductance L1 and chip STM32F103VCT6 SCK pins connect, and the SCKI pins of the chip LTC6803 are through inductance L2 and chip STM32F103VCT6 MOSI pins connect, and the SDO pins of the chip LTC6803 are through inductance L3 and chip STM32F103VCT6 MISO pins connect, and the CSBI pins of the chip LTC6803 are through inductance L4 and chip STM32F103VCT6 CS pins connect.
During actual use, chip LTC6803 C1 pins~C12 pins with batteries of electric automobile group per batteries Positive pole connects, and for monitoring the voltage of every batteries, each chip LTC6803 can measure up to 12 independences being connected in series Battery unit;Chip LTC6803 proprietary design enables multiple chip LTC6803 tandem stacks, and chip LTC6803 CSBO draws Pin, SDOI pins and SCKO pins are used for and lower layer chip LTC6803 serial communications;Chip LTC6803 SCLK pins, SCKI Pin, SDO pins and CSBI pins are used to carry out SPI communication with chip STM32F103VCT6.
As shown in figure 3, in the present embodiment, the temperature observation circuit 4 includes the amplifier that model is LT6004LMSB U1 and amplifier U2, the in-phase input end of the amplifier U1 connect with electric capacity C1 one end, the other end point of the electric capacity C1 Two-way, connecting all the way through electric capacity C2 with power end VREF, another way ground connection, the reverse input end of the amplifier U1 divides two-way, The output end with amplifier U1 connects all the way, and another way connects with thermistor R1 one end, and the thermistor R1's is another End connects with chip LTC6803 VTEMP1 pins;The in-phase input end of the amplifier U2 connects with power end VREF, described Amplifier U2 reverse input end divides two-way, and the output end with amplifier U2 connects all the way, another way and the one of thermistor R2 End connects, and the other end of the thermistor R2 connects with chip LTC6803 VTEMP2 pins.
During actual use, chip LTC6803 has two ADC input channels:VTEMP1 pins and VTEMP2 pins, are used for Thermistor R1 and thermistor R2 is monitored, external voltage information is read with this, prevents battery and chip LTC6803 damage.
As shown in figure 4, in the present embodiment, the current collection circuit 3 includes chip ACS712, the chip ACS712's VIOUT pins connect with chip STM32F103VCT6 PA0 pins.
During actual use, chip ACS712 is made up of a linear Hall sensor circuit, and the degree of accuracy is high, signal amplification During bias low, it is 60A that chip ACS712 maximum, which can detect electric current, can meet the current detecting need of battery of electric vehicle group Ask, the current data in batteries of electric automobile group is transferred to controller 1 by chip ACS712.
As shown in figure 5, in the present embodiment, the relay control circuit 8 includes relay K1, and the relay K1's connects The end of line 1 connects with triode Q1 colelctor electrode, and the end of wiring 2 of the relay K1 connects with 5V power ends, the relay K1 A stationary contact connect with charge circuit, another stationary contact of the relay K1 connects with charge circuit, three pole Pipe Q1 grounded emitter, the triode Q1 base stages connect through resistance R3 with chip STM32F103VCT6 PA8 pins.
During actual use, batteries of electric automobile group charge when, when the voltage for detecting certain batteries be higher than 4.2V, and When disconnect charge circuit;When batteries of electric automobile group is discharged, when the voltage of certain batteries is less than 3.0V, to disconnect and discharge back Road, stop electric discharge.Triode Q1 base stage connects with chip STM32F103VCT6 PA8 pins, using triode Q1 as opening Close, whether power supply is accessed by control relay K1 coils, to control the on and off of charge circuit and discharge loop.
As shown in figure 1, in the present embodiment, the output end of the controller 1 is further connected with heat abstractor 12.
During actual use, when the temperature of batteries of electric automobile group is too high, controller 1 sends control command, opens radiating Device 12 is radiated, to prevent the damage of batteries of electric automobile group and chip LTC6803.
In the present embodiment, the heat abstractor 12 is fan.
When it is implemented, monitoring the voltage in batteries of electric automobile group per batteries in real time by battery monitor 5, prevent Over-charging of battery and mistake are put, and are monitored the electric current per batteries in batteries of electric automobile group in real time by current monitoring circuit 3, are passed through temperature Degree observation circuit 4 monitors the temperature in batteries of electric automobile group per batteries in real time, when the temperature monitored is more than design temperature When, controller 1 is simultaneously emitted by control signal to warning circuit 11 and heat abstractor 12, and warning circuit 11 is used to remind staff Other effective measures are taken in time, prevent temperature is too high from being damaged to battery, and produce other danger, to batteries of electric automobile Group is effectively monitored, equalizing circuit 7 in batteries of electric automobile group per batteries progress Balance route, by controlling switch, The energy of the more individual battery cells of state-of-charge is consumed, until with other individual battery cells in batteries of electric automobile group Reach balanced, prevent battery capacity, internal resistance, the differentia influence batteries of electric automobile group of open-circuit voltage between individual battery cells Service life, by control relay circuit 3 in batteries of electric automobile group per batteries appearance overcharge or cross put when and When cut off charge circuit or discharge loop, realize effective management to batteries of electric automobile group, it is inconsistent to solve battery pack Problem, it is significant to the service life of extension battery pack.Controller 1 is by the voltage, electric current, temperature of batteries of electric automobile group Degree signal is sent to host computer 9 and memory 10 simultaneously, and host computer 9 shows voltage, electric current, temperature signal, facilitates work Make personnel's real time inspection, memory 10 stores voltage, electric current, temperature signal, facilitates staff to call and checks.
It is described above, only it is embodiment of the present utility model, not the utility model is imposed any restrictions, it is every according to this Any simple modification, change and the equivalent structure change that utility model technical spirit is made to above example, still fall within In the protection domain of technical solutions of the utility model.

Claims (8)

  1. A kind of 1. cell management system of electric automobile, it is characterised in that:Including controller (1) and it is multiple be used for electric automobile electricity The management module (2) that every batteries in the group of pond are managed independently, the management module (2) include being used to monitor electric automobile Often economized on electricity in battery pack cell voltage battery monitor (5) and connect with the controller (1) output end be used to control it is described Per the relay control circuit (8) of batteries charging and discharging circuit break-make, the controller (1) and battery in batteries of electric automobile group Communication isolation circuit (6) is connected between monitor (5), the input of the battery monitor (5) is terminated with being used to monitor the electricity It is terminated with being used for per the temperature observation circuit (4) of batteries temperature, the output of the battery monitor (5) in electrical automobile battery pack Equalizing circuit (7) to carrying out Balance route in the batteries of electric automobile group per batteries, the input of the controller (1) It is connected to the current collection circuit (3) for detecting bus current in the batteries of electric automobile group, the output of the controller (1) It is terminated with host computer (9), memory (10) and warning circuit (11).
  2. 2. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The communication isolation circuit (6) inductance L1, inductance L2, inductance L3 and inductance L4 are included, the battery monitor (5) is chip LTC6803, the chip LTC6803 SCLK pins connect through inductance L1 with the controller (1), and the SCKI pins of the chip LTC6803 are through inductance L2 connects with the controller (1), and the SDO pins of the chip LTC6803 connect through inductance L3 with the controller (1), institute The CSBI pins for stating chip LTC6803 connect through inductance L4 with the controller (1).
  3. 3. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The temperature observation circuit (4) the amplifier U1 and amplifier U2 that model is LT6004LMSB, the in-phase input end and electric capacity of the amplifier U1 are included C1 one end connects, and the other end of the electric capacity C1 divides two-way, connects all the way through electric capacity C2 with power end VREF, another way connects Ground, the reverse input end of the amplifier U1 divide two-way, and the output end with amplifier U1 connects all the way, another way and thermistor R1 one end connects, and the other end of the thermistor R1 connects with battery monitor (5);The homophase input of the amplifier U2 End connects with power end VREF, and the reverse input end of the amplifier U2 divides two-way, and the output end with amplifier U2 connects all the way, Another way connects with thermistor R2 one end, and the other end of the thermistor R2 connects with battery monitor (5).
  4. 4. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The current collection circuit (3) the VIOUT pins including chip ACS712, the chip ACS712 connect with the controller (1).
  5. 5. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The Control returns Road (8) includes relay K1, and the end of wiring 1 of the relay K1 connects with triode Q1 colelctor electrode, the relay K1's The end of wiring 2 connects with 5V power ends, and a stationary contact of the relay K1 connects with charge circuit, and the relay K1's is another One stationary contact connects with charge circuit, the grounded emitter of the triode Q1, the triode Q1 base stages through resistance R3 with The controller (1) connects.
  6. 6. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The controller (1) is STM32 family chips.
  7. 7. according to a kind of cell management system of electric automobile described in claim 1, it is characterised in that:The controller (1) Output end is further connected with heat abstractor (12).
  8. 8. according to a kind of cell management system of electric automobile described in claim 7, it is characterised in that:The heat abstractor (12) For fan.
CN201720568221.8U 2017-05-19 2017-05-19 A kind of cell management system of electric automobile Expired - Fee Related CN206834282U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720568221.8U CN206834282U (en) 2017-05-19 2017-05-19 A kind of cell management system of electric automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720568221.8U CN206834282U (en) 2017-05-19 2017-05-19 A kind of cell management system of electric automobile

Publications (1)

Publication Number Publication Date
CN206834282U true CN206834282U (en) 2018-01-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109067146A (en) * 2018-07-19 2018-12-21 江苏卓岸电源科技有限公司 A kind of power-supply management system and management method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109067146A (en) * 2018-07-19 2018-12-21 江苏卓岸电源科技有限公司 A kind of power-supply management system and management method

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