CN108761337A - A kind of lithium battery management system - Google Patents

A kind of lithium battery management system Download PDF

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Publication number
CN108761337A
CN108761337A CN201810415109.XA CN201810415109A CN108761337A CN 108761337 A CN108761337 A CN 108761337A CN 201810415109 A CN201810415109 A CN 201810415109A CN 108761337 A CN108761337 A CN 108761337A
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battery
voltage
battery pack
collector
current
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CN201810415109.XA
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Chinese (zh)
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汪亚非
郝俊
郝彦青
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Zigong Tong Fa Industrial Co Ltd
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Zigong Tong Fa Industrial Co Ltd
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Priority to CN201810415109.XA priority Critical patent/CN108761337A/en
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Abstract

A kind of lithium battery management system provided by the invention includes battery pack, battery acquisition module, background processor, the battery pack includes multiple single batteries, the battery acquisition module includes battery pack collector and multiple single battery collectors, multiple single battery collectors connect one to one with each single battery, the battery pack collector is attached with battery pack, mode is connect by radio communication with background processor respectively for the battery collector and battery pack collector, the single battery collector is for acquiring single battery data information, the battery pack collector is used to acquire the data information of the battery pack, the background processor further includes fault detection unit to collect monomer battery voltage, single battery temperature, battery voltage and battery pack current are to carry out fault detect and judgement.

Description

A kind of lithium battery management system
Technical field
The present invention relates to electronic monitoring technical fields, more specifically to a kind of lithium battery management system.
Background technology
In recent years, domestic multiple commercial vendors sequentially release various products for battery testing system and battery failures detection, The battery of BMMS accumulator monitorings management system, ten thousand Smartcom Automation Co., Ltd of Shenzhen such as including Yi Tuo Science and Technology Ltd.s Monitor expert maintenance system etc..
But above-mentioned battery monitoring system use is to have line monitoring method, mounting box is safeguarded all extremely difficult and logical The internal resistance progress fault detect for measuring battery is crossed, cost is excessively high, and the internal resistance of cell is small to arrive milliohm rank, and measurement accuracy also is difficult to reach It is required that.
Invention content
In view of this, the purpose of the present invention is to provide a kind of lithium battery management system, to improve monitoring accuracy and detection Efficiency reduces workload.
To achieve the above object, the present invention provides following technical solutions:Including:A kind of lithium battery management system, it is special Sign is, including:Battery pack, battery acquisition module, background processor, the battery pack includes multiple single batteries, described Battery acquisition module includes battery pack collector and multiple single battery collectors, and multiple single battery collectors are electric with each monomer Pond connects one to one, and the battery pack collector is attached with battery pack, the battery collector and battery pack collector Mode is connect by radio communication with background processor respectively,
For acquiring single battery data information, single battery data information includes the single battery collector:Monomer Cell voltage and single battery temperature;
The battery pack collector is used to acquire the data information of the battery pack, and the battery pack data information includes: Battery voltage, battery pack current;
The background processor further includes fault detection unit to collect monomer battery voltage, single battery temperature, electricity Pond group voltage and battery pack current;
The fault detection unit is modified the battery pack current being collected into comprising according to drift calibration parameter β And normalized current IMark+Configure current parameters αElectric current+, αElectric current+=IMark+/ISchool- β, wherein correcting current IRepair+=(IIt surveys-β)×αElectric current+; The fault detection unit is collected it after battery pack current is modified, cooperation monomer battery voltage, single battery temperature, electricity Pond group voltage is to carry out fault detect and judgement.
In a preferred embodiment, the fault detection unit is modified battery voltage comprising according to standard Normal voltage VMarkAnd calibration voltage VSchoolCalculate voltage calibration parameter alphaVoltage, wherein correcting voltage VIt corrects=VIt surveys×αVoltage, the failure After detection unit collects it battery pack current and battery voltage is modified, cooperation single battery temperature, single battery electricity Pressure is to carry out fault detect and judgement.
In a preferred embodiment, the fault detection unit detection battery voltage and the single battery electricity in battery pack The difference of the sum of pressure judges to export battery pack connecting fault, when the two difference is less than or equal to when the two difference is more than preset value When preset value, judge to export battery pack connection normally.
In a preferred embodiment, when the fault detection unit detect monomer battery voltage value be 0, then judge to export Single battery connecting fault;When detecting that monomer battery voltage value is higher than charge threshold, it is judged as overcharge;When detecting list When body battery voltage value is less than discharge threshold, it is judged as overdischarge;When monomer battery voltage value is in floating charge range, detection is continuous Time in floating charge range, upon this detection between be more than preset value when, be judged as floating charge overlong time;When detect monomer electricity When cell voltage value is in not enough power supply, detection continuously be in state time, upon this detection between be more than preset value when, be judged as It does not charge for a long time after electric discharge.
In a preferred embodiment, the fault detection unit further includes battery pack health Evaluation step:Carry out one Secondary complete discharge;The threshold value T of complete discharge time t is obtained according to discharge current or discharge power enquiry of historical data archivesm;Root The threshold value δ of battery power discharge average voltage undulating value is obtained according to complete discharge time enquiry of historical data archives1;When complete electric discharge Time T > TmWhen, judge that battery capacity keeps good, when battery capacity keeps good, when battery power discharge voltage is equal The undulating value δ of value2< δ1When, battery pack balancing is judged, as the undulating value δ of battery power discharge average voltage2> δ1When, judge It is unbalanced to go out battery pack, at this time when determine have in the recent period carry out super-high-current electric discharge when, assessed from historical performance obtained in data it is close Phase heavy-current discharge is to battery performance assessment result, to judge battery pack overall performance well but between single battery Occur unbalanced, find unbalanced monomer, and suggests that user carries out balance charge/discharge;It is recent without carrying out super-high-current when determining When electric discharge, the further discharge voltage mean value undulating value δ of more each single battery3And δ1Judge to deviate battery pack average state Single battery finds unbalanced list to judge that battery pack overall performance is good but it is unbalanced to occur between single battery Body, and suggest that user carries out balance charge/discharge.
In a preferred embodiment, the battery pack health Evaluation step further includes working as complete discharge time T < Tm When, judge that battery capacity declines, further judges the undulating value δ of battery power discharge average voltage at this time2< δ1, judge electricity Pond group is balanced, further judges that each battery cell deteriorates seriously in battery pack;When battery power discharge average voltage Undulating value δ2> δ1When, judge that battery pack is unbalanced, at this time when determination has in the recent period carries out super-high-current electric discharge, from history It can assess to obtain in data and be large current discharge in the recent period to battery performance assessment result, to judge that battery pack overall performance is bad Change and occur unbalanced between each single battery, find backward single battery, and suggests that user replaces and fall behind single battery.
In a preferred embodiment, the single battery collector includes:Power circuit, voltage acquisition unit, temperature are adopted Collect unit, wireless transmission unit, wherein:The power circuit is used to provide power supply for single battery collector;The voltage is adopted Collection unit is used to acquire the cell voltage of the single battery;The temperature collecting cell is used to acquire the electricity of the single battery Pond temperature;The wireless transmission unit is used for the cell voltage of the single battery and battery temperature is square by radio communication Formula is sent to background processor.
In a preferred embodiment, the battery pack collector includes:Battery voltage collector and battery pack current are adopted Storage, the battery voltage collector include power circuit, voltage acquisition unit, wireless transmission unit, the power circuit For providing power supply for battery voltage collector;The voltage acquisition unit is for acquiring the battery voltage;The nothing Line transmission unit is for by battery voltage, mode to be sent to background processor by radio communication;The battery pack current acquisition Device includes power circuit, current acquisition unit, wireless transmission unit, and the power circuit is used to carry for battery pack current collector Power supply source;The current acquisition unit is for acquiring the battery pack current;The wireless transmission unit is used for battery pack electricity Stream is sent to background processor by communication.
In a preferred embodiment, the background processor further includes radio receiving unit, power circuit and fault alarm Unit, the power circuit are used to provide power supply for background processor;The radio receiving unit is adopted to receive single battery Battery information transmitted by the wireless transmission unit of storage, battery voltage collector and battery pack current collector, the event Hinder alarm unit to receive the judgement information of fault detection unit and carry out corresponding fault alarm.
In a preferred embodiment, the communication using 433M wireless modes, Sub 1G communications, WIFI communications or Bluetooth wireless communication mode.
It can be seen from the above technical scheme that the present invention realizes to a monomer electricity battery pack using wireless monitor mode Cell voltage, the major parameters such as single battery temperature, battery voltage, battery pack current carry out real time on-line monitoring.The present invention adopts Wire transmission is replaced with wireless communication, simplifies system, is easy to structure expansion.The failure detection schemes of the present invention are proposed for sentencing Three basic parameters of disconnected battery pack health status:Complete discharge time, the steep undulating value for dropping voltage and discharge voltage mean value, and Combination failure differentiates flow to more convenient carry out fault detect and judgement, and fault detect need not measure battery Cost is greatly saved in internal resistance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of lithium battery management system structural schematic diagram provided in an embodiment of the present invention;
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.
A kind of lithium battery management system as shown in Figure 1, including:Battery pack, battery acquisition module, background processor, it is described Battery pack includes multiple single batteries, enumerates 2 single batteries in this present embodiment, it is notable that in other implementations In example, the quantity of single battery can be 3, can also be more than 3, system that the present invention is not limited thereto.The battery is adopted Collection module includes battery pack collector and 2 single battery collectors, and multiple single battery collectors are a pair of with each single battery one It should connect.The single battery collector includes:Power circuit, voltage acquisition unit, temperature collecting cell, wireless transmission are single Member, wherein:The power circuit is used to provide power supply for single battery collector;The voltage acquisition unit is described for acquiring The cell voltage of single battery;The temperature collecting cell is used to acquire the battery temperature of the single battery;The wireless hair Send unit for mode to be sent to background process by radio communication by the cell voltage of the single battery and battery temperature Device.The battery pack collector includes:Battery voltage collector and battery pack current collector, the battery voltage acquisition Device includes power circuit, voltage acquisition unit, wireless transmission unit, and the power circuit is used to carry for battery voltage collector Power supply source;The voltage acquisition unit is for acquiring the battery voltage;The wireless transmission unit is used for battery pack electricity Mode is sent to background processor to pressure by radio communication;The battery pack current collector includes power circuit, current acquisition Unit, wireless transmission unit, the power circuit are used to provide power supply for battery pack current collector;The current acquisition unit For acquiring the battery pack current;The wireless transmission unit is for by battery pack current, mode to be sent to by radio communication Background processor.The background processor further includes radio receiving unit, power circuit and fault alarm unit, the power supply electricity Road is used to provide power supply for background processor;The radio receiving unit is receiving single battery collector, battery voltage Battery information transmitted by the wireless transmission unit of collector and battery pack current collector, the fault alarm unit is connecing It receives the judgement information of fault detection unit and carries out corresponding fault alarm.The mode of fault alarm may include live jingle bell, The modes such as bright light, short message, Email notify user.
In the present invention, the communication using 433M wireless modes, Sub 1G communications, WIFI without Line communication mode or Bluetooth wireless communication mode.
The background processor further includes fault detection unit to collect monomer battery voltage, single battery temperature, electricity Pond group voltage and battery pack current;The fault detection unit is modified the battery pack current being collected into comprising according to Drift calibration parameter β and normalized current IMark+Configure current parameters αElectric current+, αElectric current+=IMark+/ISchool- β, wherein correcting current IRepair+= (IIt surveys-β)×αElectric current+;The fault detection unit is modified battery voltage comprising according to standard voltage VMarkAnd Calibration voltage VSchoolCalculate voltage calibration parameter alphaVoltage, wherein correcting voltage VIt corrects=VIt surveys×αVoltage, the fault detection unit is to it After collection battery pack current and battery voltage are modified, cooperation single battery temperature, monomer battery voltage are to carry out failure Detection and judgement.
The mode of fault detect and judgement of the present invention includes mainly following several:
1, the difference of the sum of monomer battery voltage in the fault detection unit detection battery voltage and battery pack, when When the two difference is more than preset value, judge to export battery pack connecting fault, when the two difference is less than or equal to preset value, judge defeated It is normal to go out battery pack connection.
2, when the fault detection unit detect monomer battery voltage value be 0, then judge export single battery connection therefore Barrier.
3, when detecting that monomer battery voltage value is higher than charge threshold, it is judged as overcharge.
4, when detecting that monomer battery voltage value is less than discharge threshold, it is judged as overdischarge.
5, when monomer battery voltage value is in floating charge range, detection is continuously in the time of floating charge range, when detecting When time is more than preset value, it is judged as floating charge overlong time.
6, when detecting that monomer battery voltage value is in not enough power supply, detection is continuously in the time of state, works as detection When being more than preset value to the time, do not charge for a long time after being judged as electric discharge.
7, by judge single battery case temperature whether in normal range (NR) with temperature failure.
The fault detection unit further includes battery pack health Evaluation step:Carry out a complete discharge;According to putting Electric current or discharge power enquiry of historical data archives obtain the threshold value T of complete discharge time tm;It is looked into according to complete discharge time Ask the threshold value δ that historical data archives obtain battery power discharge average voltage undulating value1;As complete discharge time T > TmWhen, judge Battery capacity keeps good, when battery capacity keeps good, as the undulating value δ of battery power discharge average voltage2< δ1 When, battery pack balancing is judged, as the undulating value δ of battery power discharge average voltage2> δ1When, judge that battery pack is unbalanced, this When determine in the recent period have carry out super-high-current electric discharge when, from historical performance assess data in obtain in the recent period heavy-current discharge to battery Group performance evaluation result is found not to judge that battery pack overall performance is good but it is unbalanced to occur between single battery Balanced monomer, and suggest that user carries out balance charge/discharge;When determining in the recent period without carrying out super-high-current electric discharge, further relatively The discharge voltage mean value undulating value δ of each single battery3And δ1The single battery for deviateing battery pack average state is judged, to judge It is good but occur unbalanced between single battery to go out battery pack overall performance, finds unbalanced monomer, and suggest user's progress Balance charge/discharge.
The battery pack health Evaluation step further includes working as complete discharge time T < TmWhen, judge battery capacity Decline, further judges the undulating value δ of battery power discharge average voltage at this time2< δ1, judge battery pack balancing, further sentence Break and each battery cell in battery pack and deteriorate seriously;As the undulating value δ of battery power discharge average voltage2> δ1When, judge It is unbalanced to go out battery pack, at this time when determine have in the recent period carry out super-high-current electric discharge when, assessed from historical performance obtained in data it is close Phase heavy-current discharge is to battery performance assessment result, to judge between the deterioration of battery pack overall performance and each single battery Occur unbalanced, find backward single battery, and suggests that user replaces and fall behind single battery.
Lithium battery management system provided by the present invention is described in detail above.Each embodiment is adopted in specification Described with progressive mode, each embodiment focuses on the differences from other embodiments, each embodiment it Between identical similar portion just to refer each other.For the device disclosed in the embodiment, due to itself and method disclosed in embodiment Corresponding, so description is fairly simple, reference may be made to the description of the method.It should be pointed out that being led for this technology For the those of ordinary skill in domain, without departing from the principle of the present invention, can also to the present invention carry out it is several improvement and Modification, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or apparatus that includes the element.

Claims (10)

1. a kind of lithium battery management system, which is characterized in that including:Battery pack, battery acquisition module and background processor, it is described Battery pack includes multiple single batteries, and the battery acquisition module includes battery pack collector and the acquisition of multiple single batteries Device, multiple single battery collectors connect one to one with each single battery, and the battery pack collector is connected with battery pack It connects, mode is connect by radio communication with background processor respectively for the battery collector and battery pack collector;
For acquiring single battery data information, single battery data information includes the single battery collector:Single battery Voltage and single battery temperature;
For acquiring battery pack data information, the battery pack data information includes the battery pack collector:Battery voltage And battery pack current;
The background processor further includes fault detection unit to collect monomer battery voltage, single battery temperature, battery pack Voltage and battery pack current;
The fault detection unit is modified the battery pack current being collected into comprising according to drift calibration parameter β and mark Quasi- electric current IMark+Configure current parameters αElectric current+, αElectric current+=IMark+/ISchool- β, wherein correcting current IRepair+=(IIt surveys-β)×αElectric current+
The fault detection unit is collected it after battery pack current is modified, and coordinates monomer battery voltage, single battery Temperature, battery voltage are to carry out fault detect and judgement.
2. lithium battery management system according to claim 1, which is characterized in that the fault detection unit is to battery pack electricity Pressure is modified comprising according to standard voltage VMarkAnd calibration voltage VSchoolCalculate voltage calibration parameter alphaVoltage, wherein correcting Voltage VIt corrects=VIt surveys×αVoltage, after the fault detection unit collects it battery pack current and battery voltage is modified, and Coordinate single battery temperature, monomer battery voltage to carry out fault detect and judgement.
3. lithium battery management system according to claim 2, which is characterized in that the fault detection unit detects battery pack The difference of the sum of monomer battery voltage in voltage and battery pack judges to export battery pack when the two difference is more than preset value Connecting fault judges to export battery pack connection normally when the two difference is less than or equal to preset value.
4. lithium battery management system according to claim 2, which is characterized in that when the fault detection unit detects list Body battery voltage value is 0, then judges to export single battery connecting fault;When detect monomer battery voltage value be higher than charge threshold When, it is judged as overcharge;When detecting that monomer battery voltage value is less than discharge threshold, it is judged as overdischarge;Single battery electricity When pressure value is in floating charge range, detection continuously be in floating charge range time, upon this detection between be more than preset value when, be judged as Floating charge overlong time;When detecting that monomer battery voltage value is in not enough power supply, detection is continuously in the time of state, works as inspection When measuring the time more than preset value, do not charge for a long time after being judged as electric discharge.
5. lithium battery management system according to claim 4, which is characterized in that the fault detection unit further includes battery Group health Evaluation step:Carry out a complete discharge;It is obtained according to discharge current or discharge power enquiry of historical data archives Obtain the threshold value T of complete discharge time tm;It is equal that battery power discharge voltage is obtained according to complete discharge time enquiry of historical data archives It is worth the threshold value δ of undulating value1;As complete discharge time T > TmWhen, judge that battery capacity keeps good, when battery capacity is kept When good, as the undulating value δ of battery power discharge average voltage2< δ1When, battery pack balancing is judged, when battery power discharge voltage The undulating value δ of mean value2> δ1When, judge that battery pack is unbalanced, at this time when determination has in the recent period carries out super-high-current electric discharge, from Historical performance is assessed to obtain in data and is large current discharge in the recent period to battery performance assessment result, to judge battery pack entirety It is functional but occur unbalanced between single battery, unbalanced monomer is found, and suggest that user carries out balance charge/discharge;When When determining in the recent period without carrying out super-high-current electric discharge, the further discharge voltage mean value undulating value δ of more each single battery3And δ1 The single battery for deviateing battery pack average state is judged, to judge battery pack overall performance well but between single battery Occur unbalanced, find unbalanced monomer, and suggests that user carries out balance charge/discharge.
6. lithium battery management system according to claim 5, which is characterized in that the battery pack health Evaluation step Further include working as complete discharge time T < TmWhen, judge that battery capacity declines, further judges that battery power discharge voltage is equal at this time The undulating value δ of value2< δ1, judge battery pack balancing, further judge that each battery cell deteriorates sternly in battery pack Weight;As the undulating value δ of battery power discharge average voltage2> δ1When, judge that battery pack is unbalanced, at this time when determine in the recent period have into When row super-high-current discharges, obtains and is large current discharge in the recent period to battery performance assessment result from historical performance assessment data, It is unbalanced to judge to occur between the deterioration of battery pack overall performance and each single battery, backward single battery is found, and build It discusses user and replaces and fall behind single battery.
7. lithium battery management system according to claim 1, which is characterized in that the single battery collector includes:Electricity Source circuit, voltage acquisition unit, temperature collecting cell, wireless transmission unit, wherein:The power circuit is used to be single battery Collector provides power supply;The voltage acquisition unit is used to acquire the cell voltage of the single battery;The temperature acquisition list Battery temperature of the member for acquiring the single battery;The wireless transmission unit is used for the cell voltage of the single battery And mode is sent to background processor to battery temperature by radio communication.
8. lithium battery management system according to claim 1, which is characterized in that the battery pack collector includes:Battery Group voltage collector and battery pack current collector, the battery voltage collector include power circuit, voltage acquisition unit, Wireless transmission unit, the power circuit are used to provide power supply for battery voltage collector;The voltage acquisition unit is used for Acquire the battery voltage;Wireless transmission unit is for by battery voltage, mode to be sent to background process by radio communication Device;The battery pack current collector includes power circuit, current acquisition unit, wireless transmission unit, and power circuit is for being Battery pack current collector provides power supply;The current acquisition unit is for acquiring the battery pack current;Wireless transmission unit For by battery pack current, mode to be sent to background processor by radio communication.
9. lithium battery management system according to claim 7 or 8, which is characterized in that the background processor further includes nothing Line receiving unit, power circuit and fault alarm unit, power circuit are used to provide power supply for background processor;It is described wirelessly to connect Unit is received to receive the wireless transmission unit of single battery collector, battery voltage collector and battery pack current collector Transmitted battery information, the fault alarm unit are corresponding former to the judgement information and progress for receiving fault detection unit Barrier alarm.
10. lithium battery management system according to claim 1, which is characterized in that the communication uses 433M Wireless mode, Sub 1G communications, WIFI communications or Bluetooth wireless communication mode.
CN201810415109.XA 2018-05-03 2018-05-03 A kind of lithium battery management system Pending CN108761337A (en)

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CN109557469B (en) * 2018-12-14 2020-10-13 广东电网有限责任公司 Storage battery nuclear capacity data analysis method and device
CN109856563A (en) * 2019-01-10 2019-06-07 安徽天帆智能科技有限责任公司 A kind of radio detection muti-piece battery system
CN110018421A (en) * 2019-05-22 2019-07-16 四川网达科技有限公司 Battery state monitoring method and system
CN110018421B (en) * 2019-05-22 2022-02-01 四川网达科技有限公司 Battery pack state monitoring method and system
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CN113325321A (en) * 2021-07-02 2021-08-31 阳光电源股份有限公司 Energy storage system floating charge state battery power failure detection method and energy storage system
CN113325321B (en) * 2021-07-02 2024-05-14 阳光电源股份有限公司 Energy storage system floating state battery power failure detection method and energy storage system
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