CN208164769U - Electric vehicle ternary lithium battery management system - Google Patents

Electric vehicle ternary lithium battery management system Download PDF

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Publication number
CN208164769U
CN208164769U CN201820490023.9U CN201820490023U CN208164769U CN 208164769 U CN208164769 U CN 208164769U CN 201820490023 U CN201820490023 U CN 201820490023U CN 208164769 U CN208164769 U CN 208164769U
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relay
electric vehicle
processor
lithium battery
module
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CN201820490023.9U
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李志�
刘波
罗国洲
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Shenzhen Headsun Polytron Technologies Inc
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Shenzhen Headsun Polytron Technologies Inc
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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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

This application involves a kind of electric vehicle ternary lithium battery management systems comprising:Processor;Preliminary filling relay;Discharge relay;Charge relay;Total load relay;Temperature collecting module;Voltage sample module;Current sampling module;Memory;Comparator;Protective module;Communication module is used to communicate with entire car controller respectively and charger communicates.Above-mentioned electric vehicle ternary lithium battery management system can be realized the whole detection of battery of electric vehicle group; by to current temperature data, current voltage data with the sampling of current flow data compared with; certain safeguard measure is taken if necessary; to the significant increase safety of battery of electric vehicle; and battery of electric vehicle management system has the advantages that design simply and realization is convenient; reduce product cost; application flexibility is higher; the safety of electric vehicle is improved on this basis; suitable for electric vehicle, it is applied equally to unmanned electric vehicle.

Description

Electric vehicle ternary lithium battery management system
Technical field
This application involves battery of electric vehicle to research and develop field, more particularly to electric vehicle ternary lithium battery management system.
Background technique
New-energy automobile develops fast recent two decades, and in recent years, main automobile power of the world is numerous and confused to be indicated to be promoted It is not only to propose " forbidding selling fuel oil timetable " to some countries of national strategy, especially European Union, and rises to specific It is legal perspective, while " restricted driving " measure should be taken.It is Chinese then be more actively, it is more positive and more systematically push The development of new-energy automobile.
Under the encouragement of numerous positive policies, helically formula rises situation to New Energy Sources In China Automobile Market, and 1 year one A big step.2016 500000,2017 800000, it is contemplated that 1,000,000 or more will be surpassed within 2018, the year two thousand twenty is planned to 200 Ten thousand.
New-energy automobile and the maximum difference of conventional fuel oil automobile are to use power battery as power drive, and as linking The important tie of battery pack, Full Vehicle System and motor, the importance of battery management system BMS is self-evident, BMS (BATTERY MANAGEMENT SYSTEM, battery management system) it is that the core technology of power battery pack and vehicle enterprise pay close attention to the most Link.
Existing electric vehicle BMS solution mostly uses the dedicated AD acquisition chip in front end, and acquisition chip passes through daisy chain Formula cascade and MCU carry out SPI communication, such as insult the LTC6804 of Li Erte, and it is poor etc. to cause the at high cost of product, flexibility.
Utility model content
Based on this, it is necessary to provide a kind of electric vehicle ternary lithium battery management system.
A kind of electric vehicle ternary lithium battery management system comprising:
Processor;
Preliminary filling relay, is connected to the processor, and is also used to connect with ternary lithium battery group and motor driver respectively;
Discharge relay, is connected to the processor, is also used to connect with ternary lithium battery group and motor driver respectively;
Charge relay is connected to the processor, and is also used to connect with ternary lithium battery group and charger respectively;
Total load relay, is connected to the processor, be also used to respectively with ternary lithium battery group, motor driver and fill Motor connection;
Temperature collecting module is connected to the processor, for acquiring current temperature data;
Voltage sample module, is connected to the processor, for acquiring current voltage data;
Current sampling module is connected to the processor, for acquiring current flow data;
Memory is connected to the processor, for distinguishing storage temperature threshold data, voltage threshold data and current threshold Value Data;
Comparator is connected to the processor, for being respectively compared current temperature data and temperature threshold data, current electricity Data and voltage threshold data and current flow data and current threshold data are pressed, comparison result is obtained;
Protective module is connected to the processor, for according to the comparison result control respectively the preliminary filling relay, The switch of the electric discharge relay, the charge relay and/or the total load relay;
Communication module is connected to the processor, and is also used to communicate with entire car controller respectively and charger communicates.
Above-mentioned electric vehicle ternary lithium battery management system can be realized the whole detection of battery of electric vehicle group, by current Temperature data, current voltage data compared with, take certain safeguard measure with the sampling of current flow data if necessary, from And the significant increase safety of battery of electric vehicle, and battery of electric vehicle management system has design simply and realizes convenient excellent Point reduces product cost, and application flexibility is higher, improves the safety of electric vehicle on this basis, is suitable for electric vehicle, It is applied equally to unmanned electric vehicle.
The electric vehicle ternary lithium battery management system further includes state-of-charge estimation mould in one of the embodiments, Block, the state-of-charge estimation block are connected to the processor, and are also used to connect with ternary lithium battery group, in battery pack lotus When electricity condition estimation is abnormal the preliminary filling relay controlled by the protective module respectively, the electric discharge relay, described filled The switch of electrical relay and the total load relay.
The quantity of the voltage sample module is multiple in one of the embodiments,;
Multiple voltage sample modules are connected to the processor respectively, and each voltage sample module is for connecting One battery pack, the voltage sample module are used to acquire the current voltage data of connected battery pack.
The quantity of the temperature collecting module is multiple in one of the embodiments,;
Multiple temperature collecting modules are connected to the processor respectively, and each temperature collecting module is for being arranged At a temperature acquisition position, the temperature collecting module is used to acquire the current temperature data of its temperature acquisition position.
The quantity of the temperature collecting module is eight in one of the embodiments,.
The electric vehicle ternary lithium battery management system further includes detection module in one of the embodiments,.
The detection module includes detection of electrical leakage unit and/or Insulation monitoring unit in one of the embodiments,.
The protective module includes that Overvoltage protecting unit, under-voltage protection unit and excess temperature are protected in one of the embodiments, Protect unit.
The processor is S32K Series of MCU in one of the embodiments,.
The processor is S32K144 microcontroller in one of the embodiments,.
Detailed description of the invention
Fig. 1 is the system block diagram of the embodiment of the application.
Fig. 2 is the connection application schematic diagram of the embodiment of the application.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not Similar improvement is done in the case where violating the application intension, therefore the application is not limited by the specific embodiments disclosed below.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level ", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application The normally understood meaning of technical staff is identical.Term as used herein is only for the purpose of describing specific embodiments, It is not intended to limit the application.Term as used herein "and/or" includes appointing for one or more relevant listed items Meaning and all combinations.
As shown in Figure 1, the application one embodiment is, a kind of electric vehicle ternary lithium battery management system comprising:Processing Device, and the preliminary filling relay, the electric discharge relay, charge relay, total load relay, temperature that are connected to the processor respectively Spend acquisition module, voltage sample module, current sampling module, memory, comparator, protective module and communication module.For example, one Kind electric vehicle ternary lithium battery management system comprising:It is processor, preliminary filling relay, electric discharge relay, charge relay, total Load-relay, temperature collecting module, voltage sample module, current sampling module, memory, comparator, protective module and logical Believe module, preliminary filling relay is connected to the processor, and preliminary filling relay is also used to drive with ternary lithium battery group and motor respectively Dynamic device connection;Electric discharge relay be connected to the processor, electric discharge relay be also used to respectively with ternary lithium battery group and motor Driver connection;Charge relay is connected to the processor, and charge relay is also used to connect with charger;Total load relay Device is connected to the processor, and total load relay is also used to connect with ternary lithium battery group, motor driver and charger respectively It connects;Temperature collecting module is connected to the processor, and temperature collecting module is for acquiring current temperature data;Voltage sample module It is connected to the processor, voltage sample module is for acquiring current voltage data;Current sampling module and the processor connect It connects, current sampling module is for acquiring current flow data;Memory is connected to the processor, and memory for storing respectively Temperature threshold data, voltage threshold data and current threshold data;Comparator is connected to the processor, and comparator is for distinguishing Compare current temperature data and temperature threshold data, current voltage data and voltage threshold data and current flow data and Current threshold data, obtain comparison result;Protective module is connected to the processor, and protective module is used for according to the comparison As a result the preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay are controlled respectively Switch;Communication module is connected to the processor, and communication module is also used to communicate with entire car controller respectively and charger is logical Letter.Above-mentioned electric vehicle ternary lithium battery management system can be realized the whole detection of battery of electric vehicle group, by Current Temperatures Data, current voltage data compared with, take certain safeguard measure with the sampling of current flow data if necessary, thus pole The safety of battery of electric vehicle is improved greatly, and battery of electric vehicle management system has the advantages that design simply and realization is convenient, Product cost is reduced, application flexibility is higher, improves the safety of electric vehicle on this basis, it is suitable for electric vehicle, It is equally applicable to unmanned electric vehicle.
The electric vehicle ternary lithium battery management system further includes state-of-charge estimation mould in one of the embodiments, Block, the state-of-charge estimation block are connected to the processor, and are also used to connect with ternary lithium battery group, in battery pack lotus When electricity condition estimation is abnormal the preliminary filling relay controlled by the protective module respectively, the electric discharge relay, described filled The switch of electrical relay and the total load relay.It is appreciated that processor, preliminary filling relay, electric discharge relay, charging after Electric appliance, total load relay, temperature collecting module, voltage sample module, current sampling module, memory module, comparison module, guarantor Shield module and communication module can be used existing commercial product and realize, the application and its each embodiment it is claimed be it in electricity The connection and application of motor-car battery management system, state-of-charge estimation block can integrate setting in the processor, can also be single It is solely realized using computing module, specific algorithm can be realized by default integrated circuit.In this way, the application and its each embodiment Mainly solves the problems, such as the ternary lithium battery pack integration detection of electric vehicle, ternary lithium battery pack has at least one ternary lithium Battery pack, in order to enhance the flexibility of electric vehicle ternary lithium battery management system and reduce its cost, further, front end is adopted Collector uses separation simulation device, realizes real to the battery core state of every a string of ternarys lithium battery group of entire ternary lithium battery pack When monitor, such as processor using newest automotive grade MCU realize data AD acquisition and automotive bus system communication.Further Ground, the protective module are connected to the processor, and the protective module is used to send control signal according to the comparison result Opening for the preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay is controlled respectively It closes;The communication module is connected to the processor, and the communication module is also used to communicate and charge with entire car controller respectively Machine communication;The state-of-charge estimation block is connected to the processor, and the state-of-charge estimation block is also used to and ternary Lithium battery group connection, to send control signal point by the protective module when ternary lithium battery group state-of-charge estimates abnormal The switch of the preliminary filling relay, the electric discharge relay, the charge relay and the total load relay is not controlled.Into One step, comparison result is electric signal, and control signal is also electric signal, for example, by electric signal trigger the preliminary filling relay, The switch of the electric discharge relay, the charge relay and the total load relay, remaining embodiment and so on.Into one Step ground, the state-of-charge estimation block is for executing following predetermined process:When to lithium battery group charge and discharge, acquire in real time each The voltage of batteries;The charge and discharge for carrying out the different multiplying power of preset times respectively to the lithium battery group is electrically operated, obtains different times The initial charge/discharge curve of double curvature of cell voltage and state-of-charge relationship is embodied under rate;Calculate a period of time current average and Cell voltage average value, and according to the current average determine it belonging to section;It calculates the current average and is located at institute The proportional positions in the section of category;Current charge-discharge magnification curve is synthesized according to the proportional positions;It is flat according to the cell voltage Mean value and current charge-discharge magnification curve obtain the corresponding table of current voltage and read battery remaining power, and obtained by charge integration Integral battery residual capacity, according to the error that table reads battery remaining power and integral battery residual capacity obtain error rate because Son calculates current correction battery remaining power according to the error rate factor, thus completes estimation battery pack state-of-charge.
Further, the current sampling module and the processor are integrally disposed.It is described in one of the embodiments, The quantity of voltage sample module is multiple;Multiple voltage sample modules are connected to the processor respectively, each electricity Press sampling module for connecting a ternary lithium battery group, the voltage sample module is for acquiring connected ternary lithium battery The current voltage data of group.For example, electric vehicle has 8 ternary lithium battery groups, the quantity of the voltage sample module is 8, often One voltage sample module is connected to the processor respectively, and each voltage sample module is for connecting a ternary Lithium battery group, 8 voltage sample modules are separately connected 8 ternary lithium battery groups, and each voltage sample module is for acquiring The current voltage data of the ternary lithium battery group connected.Further, the voltage sample module and the processor are integrated Setting.Further, multiple voltage sampling units are arranged in the voltage sample module, and each voltage sampling unit is for connecting A ternary lithium battery in ternary lithium battery group corresponding to the voltage sample module is connect, the voltage sampling unit is used for Acquire the current voltage data of connected ternary lithium battery.Further, the quantity of the voltage sample module and described three The quantity of first lithium battery group is identical and each voltage sample module is connect with each ternary lithium battery group correspondingly, uses In the current voltage data for acquiring connected ternary lithium battery group.Further, the quantity of voltage sampling unit and described three The ternary lithium battery quantity of first lithium battery group is identical and each voltage sampling unit correspondingly with the ternary lithium battery Each ternary lithium battery connection of group, for acquiring the current voltage data of connected ternary lithium battery.In this way, can obtain Obtain the current voltage data for being more accurately accurate to each ternary lithium battery group or even each ternary lithium battery.
The quantity of the temperature collecting module is multiple in one of the embodiments,;Multiple temperature collecting modules It is connected to the processor respectively, each temperature collecting module is for being arranged at a temperature acquisition position, the temperature Acquisition module is used to acquire the current temperature data of its temperature acquisition position.For example, the quantity of the temperature collecting module is eight A, eight temperature collecting modules are connected to the processor respectively, and eight temperature collecting modules are respectively used to be arranged In electric vehicle or the predetermined position of ternary lithium battery group.Further, the quantity of the temperature collecting module is multiple;It is multiple The temperature collecting module is connected to the processor respectively, and each temperature collecting module is connected with temp probe, described Temp probe is for being arranged at a temperature acquisition position, and the temperature collecting module is for acquiring its temperature connected It pops one's head in the current temperature data of temperature acquisition position.Further, the temperature collecting module is integrated with the processor and is set It sets.
The electric vehicle ternary lithium battery management system further includes being connected to the processor in one of the embodiments, Detection module, the detection module is used to occur by the processor to control the preliminary filling relay respectively when detection is abnormal The switch of device, discharge relay, the charge relay and the total load relay.In one of the embodiments, The detection module includes detection of electrical leakage unit and/or Insulation monitoring unit.For example, the detection of electrical leakage unit and the processing Device connection, the detection of electrical leakage unit are used for when detecting electric vehicle or ternary lithium battery group is leaked electricity through the processor Control the switch of the preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay. For another example, the Insulation monitoring unit is connected to the processor, and the Insulation monitoring unit is used in detection electric vehicle or ternary When Insulation Problems or insurance breakdown occur for lithium battery group by the processor control the preliminary filling relay, the electric discharge after The switch of electric appliance, the charge relay and/or the total load relay.This way it is possible to avoid safety accident occurs.
The protective module includes that Overvoltage protecting unit, under-voltage protection unit and excess temperature are protected in one of the embodiments, Protect unit.For example, the Overvoltage protecting unit is connected to the processor, the Overvoltage protecting unit is used in current voltage number When according to being more than preset overpressure protection threshold value with the comparison result of voltage threshold data, starting overvoltage protection signal is sent to the place Device is managed, the preliminary filling relay, the electric discharge relay, the charge relay and/or institute are controlled by the processor respectively State the switch of total load relay;Further, the Overvoltage protecting unit is used in current voltage data and voltage threshold number According to overvoltage threshold data comparison result be more than preset overpressure protection threshold value when, send starting overvoltage protection signal to the place Device is managed, the preliminary filling relay, the electric discharge relay, the charge relay and/or institute are controlled by the processor respectively State the switch of total load relay.For another example, the under-voltage protection unit is connected to the processor, and the under-voltage protection unit is used In when the comparison result of current voltage data and voltage threshold data is lower than default under-voltage protection threshold value, sends and start under-voltage guarantor Signal is protected to the processor, the preliminary filling relay, the electric discharge relay, the charging are controlled by the processor respectively The switch of relay and/or the total load relay;Further, the under-voltage protection unit is used in current voltage data When being lower than default under-voltage protection threshold value with the comparison result of the brownout threshold data of voltage threshold data, starting under-voltage protection is sent Signal give the processor, by the processor control respectively the preliminary filling relay, the electric discharge relay, it is described charge after The switch of electric appliance and/or the total load relay.For another example, the over-temperature protection unit is connected to the processor, the mistake Warm protection location is used for when current temperature data and the comparison result of temperature threshold data are more than default overheat protector threshold value, hair Send starting overheat protector signal to the processor, by the processor control respectively the preliminary filling relay, the electric discharge after The switch of electric appliance, the charge relay and/or the total load relay.It is appreciated that the processor controls institute respectively The switch for stating preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay, can be only The switch for controlling the preliminary filling relay, the electric discharge relay, the charge relay or the total load relay, also may be used It controls simultaneously more in the preliminary filling relay, the electric discharge relay, the charge relay or the total load relay A or whole switch.
Further, the protective module further includes over-current protecting unit and undercurrent protection unit;For example, the overcurrent is protected Shield unit is connected to the processor, and the over-current protecting unit is used in current flow data compared with current threshold data When being as a result more than default overcurrent protection threshold value, starting overcurrent protection signal is sent to the processor, is distinguished by the processor Control the switch of the preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay; Further, the over-current protecting unit is used in current flow data compared with the overcurrent threshold data of current threshold data When being as a result more than default overcurrent protection threshold value, starting overcurrent protection signal is sent to the processor, is distinguished by the processor Control the switch of the preliminary filling relay, the electric discharge relay, the charge relay and/or the total load relay. For another example, the undercurrent protection unit is connected to the processor, and the undercurrent protection unit is used in current flow data and electricity When flowing the comparison result of threshold data and being lower than default undercurrent protection threshold value, starting undercurrent protection signal is sent to the processor, The preliminary filling relay, the electric discharge relay, the charge relay and/or described total negative are controlled by the processor respectively Carry the switch of relay;Further, the undercurrent protection unit is used to owe in current flow data and current threshold data When flowing the comparison result of threshold data and being lower than default undercurrent protection threshold value, starting undercurrent protection signal is sent to the processor, The preliminary filling relay, the electric discharge relay, the charge relay and/or described total negative are controlled by the processor respectively Carry the switch of relay.In this way, passing through temperature collecting module, voltage sample when voltage, electric current and/or temperature anomaly occurs Module, current sampling module, comparator and protective module etc. cooperate processor, to preliminary filling relay, electric discharge relay, charging after Electric appliance and/or total load relay carry out switch control, including to preliminary filling relay, electric discharge relay, charge relay and total One, two or more carry out switch controls in load-relay, thus during preliminary filling, charge or discharge, especially During being use, preliminary filling relay, electric discharge relay, charge relay can be just controlled in time before causing danger And/or the switch of total load relay, thus the significant increase safety of electric vehicle ternary lithium battery, and electric vehicle ternary lithium Battery management system has the advantages that design simply and realization is convenient, reduces product cost, application flexibility is higher, in this base The safety of electric vehicle is improved on plinth, is suitable for electric vehicle, is applied equally to unmanned electric vehicle.
In each embodiment, the battery of the ternary lithium battery group is ternary lithium battery, further, the ternary lithium battery For nickel cobalt mangaic acid ternary lithium battery or nickel cobalt aluminic acid ternary lithium battery.The energy density of ternary lithium battery is higher, but safety phase To poor, for the pure electric vehicle that course continuation mileage requires, the prospect of ternary lithium battery is wider, is current driving force battery mainstream side To.Therefore, using the battery of electric vehicle management system, ternary lithium battery is greatly improved in the security performance of electric vehicle, Reduce the application risk of user.
The processor is S32K Series of MCU in one of the embodiments,.Institute in one of the embodiments, Stating processor is S32K144 microcontroller.A specific embodiment is provided again below to come to electric vehicle ternary lithium battery management System, which is made, to be illustrated, and a kind of electric vehicle ternary lithium battery management system, processor has selected Freescale automotive grade 32 8-digit microcontroller S32K144, memory module, comparison module, protective module and communication module are wholely set with processor; The microcontroller of S32K series is to realize that highest frequency reaches 112MHZ based on ARM Cortex-M4F kernel, has 2M FLASH, 4K EEPROM and 256K RAM, 12 ADC and 3 tunnel CAN communications, the peripheral hardware of S32K microcontroller combination and Encapsulation compatibility, reuses software, reduces design cost.For example, the electric vehicle ternary lithium battery management system includes 32 string ternary lithium battery voltage sampling modules, have certain sampling and management function, and also referred to as voltage sample and management is single Member.Acquire data for example, being performed handover on the ADC channel all the way of S32K144 by analog switch, ternary lithium battery it is each Kind Protection parameters threshold value is saved in the EEPROM of S32K144, by controlling the electric vehicle after the data-triggered alarm of acquisition Each relay of ternary lithium battery management system makes corresponding protection act respectively, wherein design two-way CAN communication, all the way It communicates with entire car controller, is communicated all the way with charger, the electric vehicle ternary lithium battery management system is also using electric leakage insulation inspection The situation of the insulation of brake real-time detection vehicle, guarantees the security of the lives and property of driver.
The application one embodiment is a kind of electric vehicle ternary lithium battery management system comprising be integrated with processor, temperature Spend acquisition module, voltage sample module, current sampling module, memory module, comparison module, protective module and communication module core Piece and preliminary filling relay, electric discharge relay, charge relay, total load relay and state-of-charge estimation block;Further Ground, state-of-charge estimation block can also be integral to the processor setting, such as state-of-charge estimation block is integrally disposed in the core In piece.One example is, as shown in Fig. 2, electric vehicle ternary lithium battery management system includes being integrated with processor, temperature acquisition Module, voltage sample module, current sampling module, memory module, comparison module, protective module and communication module chip, respectively Voltage sample module is connect with each ternary lithium battery group respectively, preliminary filling relay K1, electric discharge relay K2 and charge relay K3 One end pass through the anode and chip of insurance resistance R2 connection 32 concatenated ternary lithium battery group B1 to B32 respectively BAT-HV+ pin, the other end of preliminary filling relay K1 also pass through preliminary filling resistance R1 connection motor driver 222 and chip, electric discharge The other end of relay K2 is also connected with motor driver 222 and chip, and the other end of charge relay K3 is also connected with charger 333 And chip;One end of total load relay K4 connects chip, and the other end connects the BAT-HV- pin of chip, and the other end also passes through Current divider 111 connects the cathode of 32 concatenated ternary lithium battery group B1 to B32 and the ground wire pin of chip, the CAN1H of chip Pin and CAN1L pin are separately connected vehicle ECU, and CAN2H pin and CAN2L pin are separately connected charger, and PGND pin connects Body is picked up, TEMP1+ pin and TEMP- pin adjacent thereto connect a temp probe, and the rest may be inferred for remaining, total to connect Connect eight temp probes.
Electric vehicle ternary lithium battery management system is provided in the case of actual use in conjunction with concrete application below, for example, At starting (Start), battery of electric vehicle management system carry vehicle battery;ON grades of signals are activated, battery of electric vehicle pipe is started Reason system, battery of electric vehicle management system carry out self-test, the main relay (total load being closed in battery case when self-test is normal Relay);The side high pressure of detection battery of electric vehicle management system exported and receive the master of battery of electric vehicle management system after Electric appliance in the closure state, is closed preliminary filling relay, and the closure electric discharge relay after pre-charging time cut-off;There are ON grades When signal and there is no when the catastrophe failure for needing lower electricity, power-off trigger signal is judged whether there is, is, is disconnected in battery case Main relay;There are when ON grades of signals and when there is the catastrophe failure for needing lower electricity, reporting fault and relay will be switched off Mode bit disconnects relay after preset time;When ON grades of blackouts, load control is disconnected, the master in battery case is disconnected Relay closes battery of electric vehicle management system, electricity under vehicle.Further, the preset time is arranged according to system requirements, Such as 0.1,0.5,2 or 5 second etc..For example, battery of electric vehicle management system (BMU) carries out self-test after ON grades of electric vehicle power on, Self-test success, is closed the intracorporal main relay of battery case;Preliminary filling is not controlled by BMU, BMU only be responsible for the intracorporal main relay of case and Other relays, Start signal also do not issue BMU;For another example, when electric vehicle is flame-out, electricity is divided into normal lower electricity and protects with abnormal under BMS The lower electricity of shield.Normal lower electricity:Driving terminates, and vehicle turns off key, and vehicle breaks BMS power supply, and BMS disconnects main relay simultaneously It shuts down.It is electric under abnormal protection:In driving conditions, if BMS has detected monomer over-voltage, monomer is under-voltage, excess temperature, low temperature, whole group mistake Pressure, whole group is under-voltage, overcurrent, insulation leakagel volume leakage;After the level-one catastrophe failure of these failures occurs, BMS can send failure to vehicle, Request vehicle limit function drop stream;It after detecting that failure occurs 5 seconds, sends and disconnects main relay signal, disconnect electric discharge relay.Below Continue to provide further using example, for example, battery of electric vehicle management system (BMU) carries out certainly after ON grades of electric vehicle power on Inspection, self-test success, is closed the intracorporal main relay of battery case;Preliminary filling is not controlled by BMU, and BMU is only responsible for the intracorporal main relay of case Device and other relays, Start signal also do not issue BMU, for example, as shown in Fig. 2, after starting, BMU hangs vehicle battery, and ON grades Activate BMU;After ON grades, BMU carries out self-test, and self-test is normally closed the intracorporal main relay of battery case afterwards, is not attracted preliminary filling relay The negative control of device and the negative control of MCU, without the pre-charge pressure for judging that MCU is issued;For key to after Start grades, MCU detects the side BMU height After pressure has exported and received the main relay closed state that BMU is reported, MCU is closed preliminary filling relay, and MCU is closed after preliminary filling cut-off Close electric discharge relay.For example, using S32K144 as the MCU.For example, when electric vehicle is flame-out, under electricity is divided into normally under BMS Electricity under electricity and abnormal protection.Normal lower electricity:Driving terminates, and vehicle turns off key, and vehicle breaks BMS power supply, and BMS is disconnected Main relay is simultaneously shut down.It is electric under abnormal protection:In driving conditions, if BMS has detected monomer over-voltage, monomer is under-voltage, and excess temperature is low Temperature, whole group over-voltage, whole group is under-voltage, overcurrent, insulation leakagel volume leakage;After the level-one catastrophe failure of these failures occurs, BMS can be to vehicle Send failure, request vehicle limit function drop stream;Detect failure occur 5 seconds after, send disconnect main relay signal, disconnect electric discharge after Electric appliance.For example, activating ON grades of signals after starting, when ON grades of blackouts, BMS first disconnects the negative control of MCU, is then turned off battery Main relay in case;BMS shuts down, and electricity is completed under vehicle, and electricity terminates at present for this;There are judge whether there is to need when ON grades of signals The catastrophe failure of lower electricity is then BMS reporting fault, and reports and will be switched off relay status position, and then BMS disconnects battery case Interior main relay, lower electricity terminate;Otherwise judge whether there is power-off trigger signal, be then BMS disconnect battery case in master after Electric appliance, lower electricity terminate.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.

Claims (10)

1. a kind of electric vehicle ternary lithium battery management system, which is characterized in that including:
Processor;
Preliminary filling relay, is connected to the processor, and is also used to connect with ternary lithium battery group and motor driver respectively;
Discharge relay, is connected to the processor, is also used to connect with ternary lithium battery group and motor driver respectively;
Charge relay is connected to the processor, and is also used to connect with ternary lithium battery group and charger respectively;
Total load relay, is connected to the processor, be also used to respectively with ternary lithium battery group, motor driver and charger Connection;
Temperature collecting module is connected to the processor, for acquiring current temperature data;
Voltage sample module, is connected to the processor, for acquiring current voltage data;
Current sampling module is connected to the processor, for acquiring current flow data;
Memory is connected to the processor, for distinguishing storage temperature threshold data, voltage threshold data and current threshold number According to;
Comparator is connected to the processor, for being respectively compared current temperature data and temperature threshold data, current voltage number According to voltage threshold data and current flow data and current threshold data, obtain comparison result;
Protective module is connected to the processor, for controlling the preliminary filling relay, described respectively according to the comparison result The switch of electric discharge relay, the charge relay and/or the total load relay;
Communication module is connected to the processor, and is also used to communicate with entire car controller respectively and charger communicates.
2. electric vehicle ternary lithium battery management system according to claim 1, which is characterized in that further include state-of-charge estimation Module, the state-of-charge estimation block are connected to the processor, and are also used to connect with ternary lithium battery group, in battery pack The preliminary filling relay, the electric discharge relay, described is controlled by the protective module respectively when state-of-charge estimation is abnormal The switch of charge relay and the total load relay.
3. electric vehicle ternary lithium battery management system according to claim 1, which is characterized in that the voltage sample module Quantity is multiple;
Multiple voltage sample modules are connected to the processor respectively, and each voltage sample module is for connecting one Battery pack, the voltage sample module are used to acquire the current voltage data of connected battery pack.
4. electric vehicle ternary lithium battery management system according to claim 1, which is characterized in that the temperature collecting module Quantity is multiple;
Multiple temperature collecting modules are connected to the processor respectively, and each temperature collecting module is for being arranged one At temperature acquisition position, the temperature collecting module is used to acquire the current temperature data of its temperature acquisition position.
5. electric vehicle ternary lithium battery management system according to claim 4, which is characterized in that the temperature collecting module Quantity is eight.
6. electric vehicle ternary lithium battery management system according to claim 1, which is characterized in that the electric vehicle ternary lithium electricity Pond management system further includes detection module.
7. electric vehicle ternary lithium battery management system according to claim 6, which is characterized in that the detection module includes leakage Electro-detection unit and/or Insulation monitoring unit.
8. electric vehicle ternary lithium battery management system according to claim 1, which is characterized in that the protective module included Press protection location, under-voltage protection unit and over-temperature protection unit.
9. according to claim 1 to electric vehicle ternary lithium battery management system described in any one of 8, which is characterized in that the place Reason device is S32K Series of MCU.
10. electric vehicle ternary lithium battery management system according to claim 7, which is characterized in that the processor is S32K144 microcontroller.
CN201820490023.9U 2018-04-08 2018-04-08 Electric vehicle ternary lithium battery management system Active CN208164769U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108515846A (en) * 2018-04-08 2018-09-11 深圳市海德森科技股份有限公司 Battery of electric vehicle manages system and battery of electric vehicle management method
CN109525019A (en) * 2018-12-24 2019-03-26 长沙安靠电源有限公司 A kind of cell power systems
CN109823230A (en) * 2019-02-20 2019-05-31 浙江吉利汽车研究院有限公司 A kind of battery management system and electric vehicle
CN110350258A (en) * 2019-06-17 2019-10-18 广东恒翼能科技有限公司 A kind of lithium battery thermal runaway early warning protection system and method
CN110780138A (en) * 2019-11-12 2020-02-11 阳光电源股份有限公司 BMS acquisition module performance test method and device
CN111572556A (en) * 2020-05-26 2020-08-25 安徽安凯汽车股份有限公司 Intelligent driving power-on control equipment
CN112201867A (en) * 2020-09-29 2021-01-08 深圳悠典能源科技有限公司 All-weather intelligent military vehicle-mounted energy storage system
CN114114017A (en) * 2021-12-24 2022-03-01 广州巨湾技研有限公司 Method, device and system for testing power-down logic of battery management system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108515846A (en) * 2018-04-08 2018-09-11 深圳市海德森科技股份有限公司 Battery of electric vehicle manages system and battery of electric vehicle management method
CN108515846B (en) * 2018-04-08 2023-09-29 深圳市海德森科技股份有限公司 Electric vehicle battery management system and electric vehicle battery management method
CN109525019A (en) * 2018-12-24 2019-03-26 长沙安靠电源有限公司 A kind of cell power systems
CN109823230A (en) * 2019-02-20 2019-05-31 浙江吉利汽车研究院有限公司 A kind of battery management system and electric vehicle
CN110350258A (en) * 2019-06-17 2019-10-18 广东恒翼能科技有限公司 A kind of lithium battery thermal runaway early warning protection system and method
CN110780138A (en) * 2019-11-12 2020-02-11 阳光电源股份有限公司 BMS acquisition module performance test method and device
CN111572556A (en) * 2020-05-26 2020-08-25 安徽安凯汽车股份有限公司 Intelligent driving power-on control equipment
CN112201867A (en) * 2020-09-29 2021-01-08 深圳悠典能源科技有限公司 All-weather intelligent military vehicle-mounted energy storage system
CN114114017A (en) * 2021-12-24 2022-03-01 广州巨湾技研有限公司 Method, device and system for testing power-down logic of battery management system
CN114114017B (en) * 2021-12-24 2024-04-02 广州巨湾技研有限公司 Method, device and system for testing power-down logic of battery management system

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