CN107046306A - Battery control device - Google Patents

Battery control device Download PDF

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Publication number
CN107046306A
CN107046306A CN201710069551.7A CN201710069551A CN107046306A CN 107046306 A CN107046306 A CN 107046306A CN 201710069551 A CN201710069551 A CN 201710069551A CN 107046306 A CN107046306 A CN 107046306A
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CN
China
Prior art keywords
battery
temperature
value
reference value
maximum
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Granted
Application number
CN201710069551.7A
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Chinese (zh)
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CN107046306B (en
Inventor
栩川和治
大熊仁
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Denso Corp
Suzuki Motor Corp
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Denso Corp
Suzuki Motor Corp
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Publication of CN107046306A publication Critical patent/CN107046306A/en
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Publication of CN107046306B publication Critical patent/CN107046306B/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/14—Preventing excessive discharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B60L58/15—Preventing overcharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

The present invention relates to a kind of battery control device, including：Maximum/minimum temperature extraction portion, obtains the battery cell temperature of battery, to extract maximum temperature and minimum temperature；First reference value comparing section, maximum temperature is compared with the first value；Second a reference value comparing section, minimum temperature is compared with the second value less than the first value；Battery temperature selector, battery temperature selective value is set based on comparative result；And discharge and recharge limits value configuration part, the discharge and recharge limits value of battery is set based on battery temperature selective value.If maximum temperature is more than first reference value, and minimum temperature is the second a reference value or bigger, then selects maximum temperature to be used as battery temperature selective value.If maximum temperature is first reference value or smaller, and minimum temperature is less than the second a reference value, then selects minimum temperature to be used as battery temperature selective value.

Description

Battery control device
Technical field
The present invention relates to a kind of battery control device, battery control device control is arranged on motor vehicle driven by mixed power or electronic The discharge and recharge of high-voltage battery in vehicle.
Background technology
A kind of known amount for limiting the discharge and recharge for being arranged on motor vehicle driven by mixed power or the high-voltage battery in electric vehicle is come Prevent the technology of overcharge or overdischarge.For example, in electric vehicle disclosed in JP-A-7-67209, temperature is provided to battery Sensor, and based on the battery temperature detected by the temperature sensor, what limitation was provided from generator or engine to battery The amount of charging.
According to JP-A-7-67209, by limiting charge volume using only a value as battery temperature.However, due to Battery is generally made up of the component of multiple battery units, therefore can cause temperature change between battery unit.Therefore, which is determining Individual battery cell temperature is suitable for going wrong during the amount of limitation charging and discharging.
The content of the invention
Embodiment provides a kind of battery control device, and the battery control device is considered between multiple battery cell temperatures Change suitably limit the amounts of charging and discharging.
As the one side of embodiment, a kind of battery control device includes：Maximum/minimum temperature extraction portion, from multiple temperature Multiple battery cell temperatures that sensor obtains battery are spent, to extract battery maximum temperature and battery minimum temperature, the battery Maximum temperature is the maximum temperature of the multiple battery cell temperature, and the battery minimum temperature is the multiple battery unit temperature The minimum temperature of degree；First reference value comparing section, the battery maximum temperature is compared with first reference value；Second a reference value ratio Compared with portion, the battery minimum temperature is compared with the second a reference value less than the first reference value；Battery temperature selector, base Battery temperature selective value is set in the comparative result of the first reference value comparing section and the second a reference value comparing section；With And discharge and recharge limits value configuration part, the discharge and recharge limits value of battery is set based on the battery temperature selective value.If described Battery maximum temperature is more than the first reference value, and the battery minimum temperature is second a reference value or bigger, institute State battery temperature selector and select the battery maximum temperature as the battery temperature selective value.If the maximum temperature of the battery Spend for the first reference value or smaller, and the battery minimum temperature is less than second a reference value, the battery temperature Selector selects the battery minimum temperature to be used as battery temperature selective value.
Brief description of the drawings
In the accompanying drawings：
Fig. 1 is the diagram for the configured in one piece for showing motor vehicle driven by mixed power, is arranged on according to the battery control device of embodiment In the motor vehicle driven by mixed power；
Fig. 2 is the control block diagram of the battery control device according to embodiment；
Fig. 3 is the timing diagram for showing the example that the maximum temperature and minimum temperature of battery are changed over time；
Fig. 4 is the characteristic mapping for the relation between battery temperature selective value and discharge and recharge limits value that shows；And
Fig. 5 is the flow chart of the discharge and recharge limitation processing performed by battery control device.
Embodiment
(embodiment)
Hereafter, the embodiment of battery control device will be described with reference to.The battery control device peace of the present embodiment In motor vehicle driven by mixed power or electric vehicle, and to for example being supplied to the dynamotor (hereinafter referred to as " MG ") as power supply The charged state of the high-tension battery of electric power is answered to perform control.
First, the configured in one piece of motor vehicle driven by mixed power is described reference picture 1, the battery control device of the present embodiment In the motor vehicle driven by mixed power.Fig. 1 shows the motor vehicle driven by mixed power of a MG 7 including engine 8 and as power supply 90.Note, the battery control device of another embodiment may be mounted at motor vehicle driven by mixed power including two or more MG or In the electric vehicle for not including engine.
In the motor vehicle driven by mixed power 90 shown in Fig. 1, MG 7 power and the power of engine 8 are closed by Poewr transmission mechanism 91 And.Power after merging is delivered to axletree 93 via differential mechanism 92, so that driving wheel 94 rotates.
MG 7 is such as permanent-magnet synchronous three-phase alternating current (AC) motor, and being electrically connected via inverter 6 with battery 2, should Inverter mutually changes direct current (DC) electric power and 3-phase AC power.
MG 7 consumes the electric power discharged from battery, to produce power by power operation operation.In addition, MG 7 is by working as example Regenerative operation when slowing down such as motor vehicle driven by mixed power 90 produces electric power.Battery 2 utilizes the electric power produced by MG 7 via inverter 6 Charging.
The phase current flowed between inverter 6 and MG 7 is detected by circuit sensor (not shown).In addition, MG 7 electricity Angle is detected by the rotation angle sensor (not shown) of such as resolver.MG controllers 5 obtain current feedback signal (in Fig. 1 " electric current FB signals "), electrical angle signal etc., these signals are detected as described above, so as to perform feedback control to calculate drive Dynamic signal, and the enabling signal calculated is output to inverter 6.
Because the technology on such as feedback control and the typical MG controls of PWM controls is known, therefore it is detailed to omit its Thin description.In addition, in Fig. 1, the engine controller of the driving of engine 8 being controlled based on speed, accelerator position etc., is held The Centralized Controller of the centralized management of the state of row battery 2, MG 7 and engine 8 and input and output on controller Signal is not shown.
Battery 2 be such as Ni-MH battery or lithium ion battery can discharge and recharge electricity accumulating unit.In addition, battery 2 can be The electricity accumulating unit of such as double layer capacitor.Such battery 2 is generally made up of the component of multiple battery units.Battery 2 is via inverse Become device 6 to supply electric power to MG 7 and receive electric power from MG 7, thus put in the scope of predetermined limit value or lower from battery 2 Electricity and battery 2 is charged.
Note, for example, being distinguished if necessary to battery 2 with the A-battery for annex, then battery 2 also referred to as draws single First battery or high-tension battery.However, due to not specifically describing another battery herein, thus this paper battery by individually Referred to as battery 2.In addition, the DC electric power of battery 2 is not only supplied to inverter 6, but also it can turn for example, by dc-dc Low voltage DC power is changed to, so as to the power supply as annex (not shown).
Battery control device 4 obtains the information of the charged state (so-called SOC) on battery 2, battery temperature etc..Base In them, battery control device 4 calculates the discharge and recharge limits value for preventing battery 2 from overheating and deteriorating, and the discharge and recharge is limited Value processed is sent to MG controllers 5.MG controllers 5 adjust the drive signal for inverter 6 so that the amount of the discharge and recharge of battery 2 not Over-limit condition.
Based on above-mentioned configured in one piece, the battery control device 4 of present embodiment is specific by determining to be used to calculate discharge and recharge limit The configuration of the battery temperature of value processed is characterized.
In JP-A-7-67209, the battery temperature for determining charging limitation is used as using only a value.However, due to Battery 2 is made up of the component of multiple battery units as mentioned, therefore because the property difference between multiple batteries causes temperature Change.In addition, also due to for example between the battery unit near cooling fan and the battery unit away from cooling fan Battery 2 position and cause temperature change.
In order to solve the above problems, in the present embodiment, the multiple temperature for detecting multiple battery cell temperatures are provided to battery 2 Spend sensor 31 to 36.Temperature sensor 31 to 36 is such as thermistor.Although figure 1 illustrates six temperature sensors 31 To 36, but the number of multiple temperature sensors is not limited.Multiple temperature sensors 31 to 36 can be supplied to corresponding electricity Pool unit.For example, each in temperature sensor 31 to 36 can be supplied to two in sensor.
In addition, when the position due to battery 2 causes the temperature difference between battery unit, it is preferable that multiple temperature are passed Sensor 31 to 36 is positioned to include temperature and is estimated be changed into highest position and temperature is estimated the position for being changed into minimum.
Battery control device 4 obtains the battery cell temperature Tb1 to Tb6 detected respectively by temperature sensor 31 to 36.So Afterwards, battery control device 4 is properly selected for setting discharge and recharge limits value based on the multiple battery cell temperatures obtained Battery temperature.
As shown in Fig. 2 battery control device 4 has A/D converter sections 41, maximum/minimum temperature extraction portion 42, the first benchmark It is worth comparing section 43, the second a reference value comparing section 44, battery temperature selector 45, discharge and recharge limits value configuration part 46 etc..
Generally, the battery cell temperature Tb1 to Tb6 obtained by temperature sensor 31 to 36 detected value is used as analog signal It is input to battery control device 4.The analog signal of input is converted to digital letter by A/D converter sections 41 in the predetermined change-over period Number, to be sampled and held.It is in a unlimited number in six due to temperature sensor, in fig. 2, multiple temperature detections of input Value in typical fashion by " Tb1, Tb2, Tb3 ... TbN " is indicated.Note, if using the TEMP of output digit signals Device, then can be not provided with A/D converter sections 41.
Maximum/minimum temperature extraction portion 42 obtains multiple battery cell temperature Tb1 to Tb6 to extract battery maximum temperature TbMAXWith battery minimum temperature TbMIN, the battery maximum temperature is multiple battery cell temperature Tb1 to TbN maximum temperature, should Battery minimum temperature is multiple battery cell temperature Tb1 to TbN minimum temperature.
The a reference value comparing section 44 of first reference value comparing section 43 and second is obtained from maximum/minimum temperature extraction portion 42 respectively Battery maximum temperature TbMAXWith battery minimum temperature TbMIN。
First reference value comparing section 43 is by the battery maximum temperature Tb of acquisitionMAXWith being stored in first reference value therein Tref1 compares.
Second a reference value comparing section 44 is by the battery minimum temperature Tb of acquisitionMINWith being stored in the second a reference value therein Tref2 compares.Second a reference value Tref2 is set to less than first reference value Tref1.
Comparative result of the battery temperature selector 45 based on a reference value comparing section 44 of first reference value comparing section 43 and second To set battery temperature selective value TbSEL.This processing of battery temperature selector 45 is referred to as battery temperature selection processing, and it will It is described in detail below.
Discharge and recharge limits value configuration part 46 is based on battery temperature selective value TbSELTo set the discharge and recharge limits value of battery 2.
Then, by the battery temperature selective value Tb with reference to shown in timing diagram illustrated in fig. 3 and Fig. 4SELWith discharge and recharge limit The characteristic mapping of value processed, the battery temperature selection processing to battery temperature selector 45 is described.
Fig. 3 shows the battery maximum temperature Tb relative to first reference value Tref1 and the second a reference value Tref2MAXAnd electricity Pond minimum temperature TbMINThe pattern changed over time.In addition, according to battery maximum temperature TbMAXWith battery minimum temperature TbMIN's The battery temperature selective value Tb selected with the change of timeSELIndicated by thick line.Particularly noteworthy stage A, stage B With the battery temperature selective value Tb in stage CSELIndicated by circle.
Characteristic mapping in Fig. 4 shows boundary temperature α, β and γ, wherein α<β<γ.In battery temperature selective value TbSEL In middle temperature area between α and β, the absolute value of the limits value of both charge volume and discharge capacity all becomes maximum.I.e., it is allowed to reach Maximum charge and the maximum electric discharge for reaching discharge capacity Pd0 to charge volume Pc0.
In battery temperature selective value TbSELIn low-temperature region less than α, the absolute value of discharge and recharge limits value is as temperature is from α Reduce and be gradually reduced from Pc0 and Pd0.
In battery temperature selective value TbSELMore than β and less than or equal to γ high-temperature area in, discharge and recharge limits value it is exhausted More sharp it is gradually reduced in low-temperature region from Pc0 and Pd0 ratios to being worth as temperature increases from β.In battery temperature selection Value TbSELIn region more than or equal to γ, discharge and recharge limits value is 0, and discharge and recharge here is entirely disabled.
It is considered that middle temperature area is normal temperature range, low-temperature region and high-temperature area are non-normal temperature ranges.
The amount of the discharge and recharge of battery 2 is limited based on the performance plot in Fig. 4 can prevent the battery unit in low-temperature region Deteriorate and prevent the battery unit in high-temperature area from overheating.
First reference value Tref1 shown in Fig. 3 is set to the temperature at the high temperature side of the middle temperature area shown in Fig. 4.Separately Outside, the temperature at when the second a reference value Tref2 is set to the low temperature side of the middle temperature area shown in Fig. 4.
Time shaft shown in Fig. 3 is described with battery maximum temperature TbMAXWith battery minimum temperature TbMINWith the time Change.
At the time of MG drives beginning at t0, battery maximum temperature TbMAXIt is first reference value Tref1 or smaller, and electricity Pond minimum temperature TbMINIt is the second a reference value Tref2 or bigger.The selection battery maximum temperature of battery temperature selector 45 TbMAXMake For battery temperature selective value TbSELInitial value, as indicated by solid line circle.Alternately, first reference value Tref1 can be as Selected indicated in dashed circle.
Between moment t0 and t1, state continues, wherein battery maximum temperature TbMAXIt is first reference value Tref1 or more It is small, and battery minimum temperature TbMINIt is the second a reference value Tref2 or bigger.Now, battery temperature selector 45 keeps battery Temperature selective value TbSELPreceding value.Note, it is assumed that moment t0 or perform afterwards at least one processing.Therefore battery temperature choosing Select value TbSELInitial value be kept.
As represented by stage A, between time tl and t 2, battery maximum temperature TbMAXIt is first reference value Tref1 or more It is small, and battery minimum temperature TbMINLess than the second a reference value Tref2.Now, the selection of battery temperature selector 45 battery is minimum Temperature TbMINIt is used as battery temperature selective value TbSEL。
In Fig. 4, the battery temperature selective value Tb in stage ASELIt is included in low-temperature region.So if battery is minimum Temperature TbMINLess than the second a reference value Tref2, by battery minimum temperature TbMINIt is elected to be battery temperature selective value TbSELIt can prevent Battery unit deterioration with low temperature.
In battery minimum temperature TbMINAt the time of consistent with the second a reference value Tref2 at t2, battery temperature selective value TbSEL It is changed into the second a reference value Tref2.
Then as represented by stage B, between times t 2 and t 3, battery maximum temperature TbMAXIt is first reference value Tref1 Or it is smaller, and battery minimum temperature TbMINIt is the second a reference value Tref2 or bigger.Now, battery temperature selector 45 is kept Battery temperature selective value TbSELPreceding value.Note, it is assumed that moment t2 or perform afterwards at least one processing.Therefore, when Carve the second a reference value Tref2 at t2 and remain battery temperature selective value TbSEL。
In Fig. 4, the battery temperature selective value Tb in stage BSELIt is included in what battery unit most will not be deteriorated and overheated Middle temperature area.Therefore, in stage B, it is allowed to maximum charge and electric discharge.
In battery minimum temperature TbMINAt the time of consistent again with the second a reference value Tref2 between t3 and t4, battery is maximum Temperature TbMAXFor first reference value Tref1 or smaller, and battery minimum temperature TbMINLess than the second a reference value Tref2.Now, Such as situation between time ti to t 2, the selection battery minimum temperature of battery temperature selector 45 TbMINIt is used as battery temperature Selective value TbSEL。
As represented by stage C, after the time t 4, battery maximum temperature TbMAXMore than first reference value Tref1, and electricity Pond minimum temperature TbMINLess than the second a reference value Tref2.Now, the selection battery maximum temperature of battery temperature selector 45 TbMAXMake For battery temperature selective value TbSEL。
In Fig. 4, the battery temperature selective value Tb in stage CSELIt is included in high-temperature area.So if battery is maximum Temperature TbMAXMore than first reference value Tref1, by battery maximum temperature TbMAXIt is elected to be battery temperature selective value TbSELIt can prevent Battery unit overheat with high-temperature.
Note, although figure 3 illustrates even if battery maximum temperature TbMAXMore than first reference value Tref1, and Battery minimum temperature TbMINIt is for the second a reference value Tref2 or bigger, still select battery maximum temperature TbMAXIt is used as battery temperature Selective value TbSEL。
Then, flow chart that will be shown in reference picture 5, the discharge and recharge to being performed by the battery control device 4 of the present embodiment Limitation processing is described.When MG 7 is driven, this handling routine will be periodically repeated execution, and with reference to any behaviour It is used as triggering.In the description of following flow chart, symbol " S " represents step.
Note, it is considered to the timing diagram shown in Fig. 3, at the time of the process cycle of handling routine is configured to than being shown in Fig. 3 Interval between t0, t1, t2, t3 and t4 is shorter.In other words, it is assumed that each interim between the moment performs at least one Processing.Therefore, the battery temperature selective value Tb between moment t0 and moment t1SELPreceding value and moment t2 and moment t3 it Between battery temperature selective value TbSELPreceding value respectively after the time t theta with after moment t2 be chosen.
In S1, maximum/minimum temperature extraction portion 42 is from the multiple battery cell temperatures inputted to battery control device 4 Tb1 to TbN extracts battery maximum temperature TbMAXWith battery minimum temperature TbMIN。
In S2, first reference value comparing section 43 judges battery maximum temperature TbMAXWhether first reference value Tref1 is more than.
If being "Yes" in S2, handle and proceed to S3.In S3, the maximum temperature of the selection battery of battery temperature selector 45 Spend TbMAXIt is used as battery temperature selective value TbSEL。
If being "No" in S2, handle and proceed to S4.
In S4, the second a reference value comparing section 44 judges battery minimum temperature TbMINWhether the second a reference value Tref2 is less than.
If being "Yes" in S4, handle and proceed to S5.In S5, the minimum temperature of the selection battery of battery temperature selector 45 Spend TbMINIt is used as battery temperature selective value TbSEL。
If being "No" in S4, handle and proceed to S6.
In S6, battery temperature selector 45 keeps battery temperature selective value TbSELPreceding value.Note, opened in MG drivings In initial treatment after beginning, battery temperature selector 45 selects such as battery maximum temperature TbMAXIt is used as battery temperature selective value TbSELInitial value, prevent higher priority with give overheat.Alternately, first reference value Tref1 can be selected to make For initial value.
In S7, discharge and recharge limits value configuration part 46 is based on battery temperature selective value TbSEL, by using as shown in Figure 4 Characteristic maps to set discharge and recharge limit value.
As described above, S2 to S5 processing is summarized as follows in flow chart in reference picture 3 and Fig. 4, Fig. 5.
(1) if battery maximum temperature TbMAXMore than first reference value Tref1, and battery minimum temperature TbMINFor second A reference value Tref2 or bigger, the selection battery maximum temperature of battery temperature selector 45 TbMAXIt is used as battery temperature selective value TbSEL。
It is thus possible to prevent the battery unit with high temperature from overheating.
(2) if battery maximum temperature TbMAXFor first reference value Tref1 or smaller, and battery minimum temperature TbMINIt is small In the second a reference value Tref2, the selection battery minimum temperature of battery temperature selector 45 TbMINIt is used as battery temperature selective value TbSEL。
It is thus possible to prevent the battery unit with low temperature from deteriorating.
(3) if battery maximum temperature TbMAXMore than first reference value Tref1, and battery minimum temperature TbMINLess than Two a reference value Tref2, the selection battery maximum temperature of battery temperature selector 45 TbMAXIt is used as battery temperature selective value TbSEL。
It is thus possible to be preferably prevented from the battery unit overheat with high temperature.
In addition, such as in the S6 of flow chart, if battery maximum temperature TbMAXIt is first reference value Tref1 or smaller, and And battery minimum temperature TbMINIt is the second a reference value Tref2 or bigger, battery temperature selector 45 keeps battery temperature selective value TbSELPreceding value.It is thus possible to simplify when it is determined that battery unit when there is the possibility of low overheat and deterioration it is performed Processing.
As described above, the battery control device 4 of the present embodiment is it is contemplated that between the battery cell temperature of multiple batteries 2 Change to set appropriate discharge and recharge limits value.Therefore, battery 2 can be efficiently used for all battery units of battery 2 can be with Avoid the region for overheating and deteriorating.
(other embodiment)
In the above-described embodiment, first reference value Tref1 and the second a reference value Tref2 are set in as normal temperature range Middle temperature area in.That is, battery maximum temperature TbMAXThe fact that more than first reference value Tref1 and battery minimum temperature TbMINIt is small The exception in battery temperature is not indicated in the fact the second a reference value Tref2.
In another embodiment, the abnormal threshold value of the higher temperature side relative to first reference value Tref1 and relative Abnormal threshold value in the second reference value Tref2 lower temperature side can be set to also be based on being obtained by battery control device Multiple battery cell temperatures detect exception.
It should be appreciated that the invention is not restricted to above-mentioned configuration, but it may occur to persons skilled in the art that it is any and all Modification, change or equivalent should be considered within the scope of the present invention.
Hereinafter, the aspect of above-described embodiment will be summarized.
As the one side of the present embodiment, battery control device includes maximum/minimum temperature extraction portion (42), the first base Quasi- value comparing section (43), the second a reference value comparing section (44), battery temperature selector (45) and discharge and recharge limits value configuration part (46)。
Maximum/minimum temperature extraction portion obtains multiple battery units of battery (2) from multiple temperature sensors (31 to 36) Temperature, to extract battery maximum temperature (TbMAX) and battery minimum temperature (TbMIN), the battery maximum temperature is multiple battery lists The maximum temperature of first temperature, the battery minimum temperature is the minimum temperature of multiple battery cell temperatures.
First reference value comparing section is compared battery maximum temperature with first reference value.Second a reference value comparing section is by battery Minimum temperature is compared with the second a reference value less than first reference value.
Battery temperature selector is set based on the comparative result of first reference value comparing section and the second a reference value comparing section Battery temperature selective value (TbSEL).Discharge and recharge limits value configuration part sets the discharge and recharge limit of battery based on battery temperature selective value Value processed.
Battery temperature selector sets battery temperature selective value as follows.
(1) if battery maximum temperature is more than first reference value, and battery minimum temperature is the second a reference value or bigger, Battery temperature selector selection battery maximum temperature is used as battery temperature selective value.
(2) if battery maximum temperature is first reference value or smaller, and battery minimum temperature is less than the second a reference value, Battery temperature selector selection battery minimum temperature is used as battery temperature selective value.
In situation (1), it can prevent the battery unit with high temperature from overheating.In situation (2), it can prevent with low The battery unit deterioration of temperature.Accordingly, it is considered to which the change between multiple battery cell temperatures, the amount of discharge and recharge can be limited suitably System, so that, all battery units that battery can be efficiently used for battery can avoid the region for overheating and deteriorating.
If furthermore it is preferred that battery maximum temperature is first reference value or smaller, and battery minimum temperature is second A reference value is bigger, and battery temperature selector keeps the preceding value of battery temperature selective value.It is thus possible to simplify when determination battery Unit processing performed when there is low overheat and the possibility of deterioration.
It is highly preferred that battery temperature selector sets battery temperature selective value as follows.
(3) if battery maximum temperature is more than first reference value, and battery minimum temperature is less than the second a reference value, battery Temperature selector selection battery maximum temperature is used as battery temperature selective value.
It is thus possible to be preferably prevented from the battery unit overheat with high temperature.

Claims (3)

1. a kind of battery control device, including：
Maximum/minimum temperature extraction portion, multiple battery cell temperatures of battery is obtained from multiple temperature sensors, to extract battery Maximum temperature and battery minimum temperature, the battery maximum temperature are the maximum temperatures of the multiple battery cell temperature, described Battery minimum temperature is the minimum temperature of the multiple battery cell temperature；
First reference value comparing section, the battery maximum temperature is compared with first reference value；
Second a reference value comparing section, the battery minimum temperature is compared with the second a reference value less than the first reference value；
Battery temperature selector, the comparative result based on the first reference value comparing section and the second a reference value comparing section come Set battery temperature selective value；And
Discharge and recharge limits value configuration part, the discharge and recharge limits value of the battery is set based on the battery temperature selective value, its In
If the battery maximum temperature is more than the first reference value, and the battery minimum temperature is second benchmark Value is bigger, then the battery temperature selector selects the battery maximum temperature as the battery temperature selective value, and
If the battery maximum temperature is the first reference value or smaller, and the battery minimum temperature is less than described the Two a reference values, then the battery temperature selector select the battery minimum temperature to be used as the battery temperature selective value.
2. battery control device as claimed in claim 1, it is characterised in that
If the battery maximum temperature is the first reference value or smaller, and the battery minimum temperature is described second A reference value is bigger, then the battery temperature selector keeps the preceding value of the battery temperature selective value.
3. battery control device as claimed in claim 1, it is characterised in that
If the battery maximum temperature is more than the first reference value, and the battery minimum temperature is less than second base Standard is worth, then the battery temperature selector selects the battery maximum temperature to be used as the battery temperature selective value.
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