CN104113101A - Battery system with battery module and method for determining operating parameters - Google Patents
Battery system with battery module and method for determining operating parameters Download PDFInfo
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- CN104113101A CN104113101A CN201410150242.9A CN201410150242A CN104113101A CN 104113101 A CN104113101 A CN 104113101A CN 201410150242 A CN201410150242 A CN 201410150242A CN 104113101 A CN104113101 A CN 104113101A
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- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
-
- 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]
-
- 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
- B60L58/18—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
- B60L58/21—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 having the same nominal voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
-
- 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
- B60L2240/547—Voltage
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- 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
- B60L2240/549—Current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- 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
- Y02T10/64—Electric machine technologies in electromobility
-
- 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 invention provides a method for determining parameters of at least one operating parameter of a battery module (31) of a battery system (40). The battery module (31) of the battery system is configured to be in at least one battery module and capable of being selectively connected to the battery module through a control device (43) to be in bridge connection with the battery module, wherein in connecting or disconnecting the battery module (31), a curve of the voltage of the battery module of the battery module (31) and the current of the battery module and corresponding with the connection or disconnection is determined. In addition, based on the determined curve, operating parameters of the battery module (31) are calculated. In addition, a corresponding battery system (40) is provided, which is provided with a plurality of battery modules (31) capable of being connected or disconnected, and corresponding measuring devices (41), control devices (42) and analysis devices (44) and is configured to implement the method.
Description
Technical field
The present invention relates to a kind of for determining the method for at least one operational factor of battery module of battery system, the battery module of this battery system be arranged at least one batteries and can by control optionally connect or shutoff batteries or can be in this batteries bridge joint conductively.In addition, the present invention relates to a kind of battery system with at least one batteries, this at least one batteries has respectively multiple battery modules, the plurality of battery module can by control optionally connect or turn-off batteries or can be in this batteries bridge joint conductively, wherein, measurement mechanism and this battery system that at least one battery module in multiple battery modules is also provided with for determining battery module voltage and battery module electric current also comprise the control device for controlling this battery module and this measurement mechanism.In addition, the invention still further relates to a kind of motor vehicle or static application having according to battery system of the present invention.
Background technology
In the future, such as in the static application of wind power plant, such as the vehicle of hybrid power and motor vehicle or all will apply increasing battery system in the consumer field such as notebook computer and mobile phone, especially lithium-ions battery system, in these application, aspect power capability and reliability, higher requirement is all being proposed.
Wherein, in order to meet the requirement about voltage and available power given for corresponding application, be conventionally connected in series the storage battery list pond of comparatively high amts, form thus a batteries that a battery tension is provided.In order to reach a higher battery current, multiple storage battery list ponds or battery module conventionally are also additionally connected in parallel.Within batteries, organize in the mode of battery module conventionally in multiple storage battery lists pond.In addition, multiple batteries that again can be connected in parallel, wherein, on purpose control batteries, to can obtain the output voltage of expecting.
On this battery system, be conventionally connected with load, for example three phase electric machine and/or load circuit, connect through intermediate circuit where necessary.This intermediate circuit can comprise intermediate circuit, by this storage battery of Energy Coupling and this load each other of this intermediate circuit.In addition, this intermediate circuit also can have current converter, especially inverter, and it is used to by the raw AC supply voltage of accumulator DC miscarriage.
Figure 1 illustrates the schematic diagram of the battery system 10 of traditional single group.According to Fig. 1, the batteries 12 with multiple storage battery lists pond 11 is coupled to (heterogeneous) three phase electric machine 13 via the intermediate circuit 14 for example with inverter, to be this three phase electric machine power supply.Intermediate circuit has the positive input being connected with the positive branch road 15 of batteries 12 and the negative input being connected with the negative branch road 16 of batteries 12.In addition, this intermediate circuit 14 also has three outputs, and they are coupled to the corresponding input terminal of this three phase electric machine 13.
Figure 2 illustrates the schematic diagram of the battery system 20 of many groups, this battery system is coupled via inverter 25 and motor 13.This motor is for example the drive motors of electronic or motor vehicle driven by mixed power.As illustrated in Figure 2, this battery system 20 has multiple batteries 28,29, and they comprise respectively multiple battery modules that are connected in series 21.By connecting individually or the mode of bridge joint battery module 21 with respect to batteries 28,29 respectively, this battery system 20 is set to configurable.This can be by realizing the corresponding control of switch 22,23.Each battery module 21 has at least one, preferably multiple, is arranged on the storage battery list pond 11 among storage battery list pond group 24.Those batteries are connected in parallel to intermediate circuit via optional coupling inductance 27, and this intermediate circuit also has intermediate circuit 26 except inverter 25.Inverter 25 can be the inverter (PWM inverter) driving by means of pulse width modulation (PWM).Also can be described to the direct transducer of storage battery (BDC) in the configuration shown in Fig. 2.
An example of the direct transducer of storage battery is also provided in WO2011/069741A1, has described the corresponding battery system with controlled module in this article in detail.
Figure 3 illustrates the schematic diagram of other the battery system of many groups 30.Be with the difference of the battery system 20 shown in Fig. 2, the battery module 31 there replaces half-bridge to have respectively the semiconductor full-bridge with 4 switches, thereby makes the polarity that each battery module 31 can either be realized bearing connect the polarity connection that also can realize with positive.Configurable battery system 30 according to Fig. 3 also can be described to the direct inverter of storage battery (BDI) 37.As illustrated in Figure 3, the direct inverter 37 of storage battery or battery system 30 directly and motor 13 be coupled.Wherein, the output 32 of each batteries is directly connected with the corresponding splicing ear 33 of motor via wire 34,35,36.Or rather, each output 32 of batteries can be respectively connected with in U-, the V-of motor 13 or W-rotatory current link one.
In US5642275A1, provide an example of traditional direct inverter of storage battery.
Although each batteries only shows respectively two or three battery modules 21,31 expressly in Fig. 2 and Fig. 3, but specified by dotted line, each batteries can have according to desired output voltage range the battery module 21,31 of corresponding quantity.Typically, battery system 10,20,30 discussed above is also provided with the electronic installation for monitoring and balanced (balance).
For the normal operation of storage battery, it is also important identifying its current state.This is for example indispensable for coverage prediction or performance prediction.At this, current charged state (SOC), current capacitance, internal resistance and the power-performance in especially single pond are basic amounts.Above mentioned amount changed along with the useful life in storage battery list pond, because all known single pond chemicals will suppress aging.This capacitance declines along with the growth in the useful life in storage battery list pond, internal resistance R
irise and power-performance decline.Due to the uncertainty of associated, the change that therefore as far as possible accurately identification or measurement occurred along with useful life is in practice important.
At least in laboratory, can in the time of continuous service, measure (Zwischenmessungen) by centre and determine simply mentioned amount, for example capacitance in storage battery list pond, internal resistance and power-performance.For this reason, for example, at automotive field, the so-called pulse power characterization according to IS0124051/2 will typically be carried out.Can regulate by the test of single pond group or module group and test the charged state reaching and the charged/discharged pulse through regulating reaching and/or the temperature limiting at that.
Occurring so rapidly condition alternately at vehicle or exercising embedded state in service, is only more difficult reproducible for the measurement of mentioned amount.Wherein, after Measuring Time section, be at least not retainable such as the boundary condition of constant electric current.Typically, the time period existing for analyzing is only also very short.This can cause great uncertainty in the time estimating amount to be determined.So, internal resistance and frequency dependence, this will for example describe and can describe the time graph of caused business U (t)/I (t) thus by means of electric equivalent electric circuit or by means of electrochemical model according to prior art.
Especially, in the battery system can working point connecting or disconnecting separately relatively at configurable battery system 20,30 as described above and at its battery module, must determine individually internal resistance, power capability and aging for each battery module of storage battery.
Summary of the invention
Foundation the invention provides a kind of method of at least one operational factor of the battery module for definite battery system, and wherein, in described battery system, multiple battery modules are arranged at least one batteries.In addition, described battery module can optionally access described batteries or bridge joint conductively in described batteries by controlling.In access or turn-off and determine the curve described battery module voltage of described battery module and described battery module electric current, that draw in response to described connection or described shutoff when battery module.In addition implement, the calculating of the described operational factor of corresponding battery module based on determined curve.
In addition, a kind of battery system is also provided, it has at least one batteries with multiple battery modules respectively, and described multiple battery modules can optionally access described batteries or bridge joint conductively in described batteries by controlling.Wherein, at least one battery module in described battery module is provided with the measurement mechanism for determining battery module voltage and battery module electric current.In addition, described battery system also comprises the control device for controlling described battery module and described measurement mechanism.Wherein, described battery system has the analytical equipment for analyzing the measurement being realized by described measurement mechanism and is set to so implement described analysis and described control, when making in the access of battery module and turn-offing, automatically determine respectively in response to described access and the described shutoff of described battery module draw, the curve of battery module voltage and battery module electric current.
Therefore, provide in an advantageous manner useful possibility by the present invention, analyzed in access or turn-off voltage curve and the current curve that battery module is occurred in the access of battery module or turn off process in autotelic mode.
The present invention has the following advantages, and can be applied in practice among the battery system of all kinds, in these battery systems, accesses and turn-off battery module along with the passing of operation.Especially, the present invention has the following advantages, can be applied among the battery system of many groups, especially be applied to the direct converter system (DICO of storage battery, BDC) among, on several seconds among such system after connecting, be applied with corresponding potential pulse, but also can be applied among the direct inverter of storage battery (BDI).
By means of the invention provides repeatably method of one, can using through standardized laboratory measurement method as foundation, because repeat the pulse to be analyzed of storage battery list pond and battery current with similar form in each switching process according to the present invention.Therefore proposed method of measurement a kind of restriction and robust, the method all can be applied and only less depend on working point on the whole useful life in described storage battery list pond.Wherein, compared to traditional method, its precision has had substantial raising; especially compared to measuring among such method of accumulator parameter of described storage battery at the run duration of described storage battery equally therein, and without cost high modeling or parametrization.In addition,, also without any need for extra hardware, for example extra voltage measuring apparatus, because such hardware after all exists in a conventional manner.
According to a preferred form of implementation of the present invention, the internal resistance in battery module or storage battery list pond will be considered operational factor to be determined and therefore accurately determine described internal resistance.Alternatively or additionally, comprise electrical power at described at least one accumulator parameter to be determined of described battery module.
Therefore, provide following device, the voltage curve of the circumscribed occurring in the above mentioned access procedure at described battery module and turn off process and current curve can be used to high-precision pulse power measurement and internal resistance measurement by means of those devices.
According to a very favorable improvement project of the present invention, implement repeatedly synchronous described battery module voltage in succession and the measurement of described battery module electric current in response to the connection of described battery module.But the present invention is not limited to such form of implementation.Alternatively, of the present invention is also conceivable through the modification of simplifying, wherein, and for example more sparsely or be asynchronous to battery module voltage and measure described battery module electric current.Such modification can be set to constant or be specially suitable during with simple mode interpolation in essence at described battery module electric current.
According to another very favorable improvement project of the present invention, repeatedly implement determining of described accumulator parameter for each battery module.Preferably, access and batteries described in bridge joint in periodic mode for this reason.In addition, can guarantee that thus described battery module at least can routinely not be carried out unbalanced load.Wherein, always continuity ground loads another battery module with the current/voltage step limiting.Periodization by described battery module can be obtained individually all battery modules in the battery system of configurable many groups.
But the present invention is not limited to such form of implementation.So the operational mode of other the described battery module of connection is also conceivable in principle, wherein, but can keep order given in advance.So, preferably can implementation basis method of the present invention among each switching process.
Especially, described battery module also can connect according to current charged state (SOC) clearly.So described measurement can especially be carried out after corresponding battery module has reached one or more state-of-charge value that determine, definite.
Can be in implementation basis method of the present invention during charging process or during the discharge process of related battery module.
According to a preferred form of implementation of the present invention, described battery system has diagnostic device, and described diagnostic device is set to based on according to the different curve of the described battery module voltage of described battery module and described battery module electric current and the ageing state in described storage battery list pond of determining over time described battery module of multiple values of definite described at least one predetermined operational factor.
Therefore, can provide at any time the ageing state of described battery module with higher precision, because there is a designator for current ageing state.In addition, also can make thus the forecast of the power-performance of described storage battery list pond or described battery module.
Favourable improvement project of the present invention will provide in the dependent claims and be described in specification.
Be preferably lithium-ions battery according to storage battery of the present invention.
A kind of motor vehicle with motor is also provided according to an aspect of the present invention, and described motor vehicle has according to storage battery of the present invention, and wherein, described storage battery is preferably connected with the drive system of described motor.
A kind of system of static state is also provided according to a further aspect in the invention, and described system has according to storage battery of the present invention, and described storage battery is arranged for taking electric energy as electric load supplying.
Brief description of the drawings
Further set forth embodiments of the invention by means of accompanying drawing and follow-up specification.Wherein:
Fig. 1 show according to prior art, there is batteries and the motor that connects via inverter intermediate circuit as the schematic diagram of the battery system of load;
Fig. 2 shows according to schematic diagram prior art, taking the direct transducer of storage battery that is coupled via inverter and motor as the battery system of many groups of form;
Fig. 3 shows according to schematic diagram prior art, taking the direct inverter of storage battery that is coupled with motor as the battery system of many groups of form;
Fig. 4 shows according to schematic diagram a kind of form of implementation of the present invention, taking the direct inverter of storage battery that is coupled with motor as the battery system of many groups of form; And
Fig. 5 shows according to the battery module voltage under discharge scenario a kind of form of implementation of the present invention, in the time connecting battery module and the curve of battery module electric current.
Embodiment
In Fig. 4, show according to schematic diagram a kind of form of implementation of the present invention, taking the direct inverter of storage battery that is coupled with motor as the battery system of many groups of form.In those accompanying drawings, apply respectively identical Reference numeral for identical or similar parts.Some discussion that have been combined in the prior art in Fig. 3 at the parts shown in Fig. 4 have been set forth.
Battery system 40 has the series circuit of a n battery module 31 for each batteries.The quantity of battery module 31 current connection or access batteries especially depends on working point, the working point that this battery system 40 is carried out at present just.
Due to the controlled design of this battery module 31, the group voltage of each batteries almost can at random be changed.In the case of the battery system of three groups, illustrated in fig. 4, the three-phase AC power supplies voltage with frequency in the larger context can be shown.Therefore, as a rule (be close to) and never connect all battery modules simultaneously, and can be specified by AC power supplies voltage.This with only can provide traditional storage battery of DC power supply just the opposite.
The control of battery module 31 can realize by control device 42.Also can control and read measurement mechanism 41 by this control device 42.This will be illustrated by line 43 and double-head arrow in the accompanying drawings.Measurement mechanism comprises respectively current measuring device and the voltage measuring apparatus for determining corresponding battery module electric current and battery module voltage.
This battery system 40 also has analytic unit 44, measurement that can analysis measuring device 41 by means of this analytic unit.
All battery modules 31 can intermittently be connected.Wherein, the control of multiple batteries and multiple batteries can be arranged in view of being used for accordingly.Typically should on the longer time period, connect therein in the application of all battery modules 31 (for example application in) aboard ship and will preferably batteries be so set, series circuit is had than many, at least one battery module 31 that must need for maximum output voltage is provided.Single batteries is all so set in either case, makes can also regulate at any time desired output voltage in the time that a battery module 31 turn-offs.At this, in fact only relate to and guarantee voltage margin.Therefore the total energy content of battery system must not raise, and can only may change like this subregion of battery module.
Although show the direct inverter of storage battery in the form of implementation shown in Fig. 4, but the present invention also can be applied to other battery system, among these battery systems, multiple battery modules be can be accessed by separately ground or can be disconnected in series be placed among corresponding batteries.
According to the present invention, in so configurable, battery system of being provided with controlled battery module 31, can analyze the curve of the restriction of the corresponding battery module voltage that occurs and battery module electric current in access procedure and turn off process.Battery module 31 can especially so be controlled, and makes it possible to carry out high-precision pulse power measurement and internal resistance measurement.This can either also can be realized and be used as storage battery list pond 11 or the accurate power determination of battery module 31 or the basis of diagnosis reliably of power forecast and ageing state (SOH) on useful life under charge condition under discharge scenario.
Figure 5 illustrates according to the storage battery list pond U under discharge scenario in the connection that is to say access battery module of a special form of implementation of the present invention and curve U/V, the I/A of battery current I.Wherein, start battery current I start to change from the access of battery module, this battery current is from value I
0=0 value of skipping to I
1.In addition, battery module voltage declines as shown by this figure in the time of access battery module.In the time that accessing, battery module starts to carry out multiple (synchronous) measurement of battery module electric current I and battery module voltage.The first value is definite the extremely short time after respectively, for example after 0.1s and then in the scope of second until within 1 to 2 minute, carry out other value.So, can very accurately determine internal resistance R for all modules according to identical method
i, can derive in addition other important amount, for example power P.
Have among the charging process of extra charger, wherein, can be equally on purpose and module individually taking IS012405 as according to carrying out pulse power measurement when the value of one or more definite charged state (SOC).According to shown here go out form of implementation can be always in the access of limited battery module and turn off process, realize internal resistance R according to following equation
idetermine:
R
i(t
k)=(U
0-U
k)/I
k, wherein, k=1 ..., n.
Follow-up analysis can similarly be calculated and be used to power P.For this reason by the following formula of application:
P(t
k)=U
ki
k, wherein, k=1 ..., n.
Wherein, internal resistance R
iwith determining of power P, the moment different is carried out, further improve amount of information by the frequency dependence of internal resistance or the emulation of temporal correlation thus.
Except aforesaid word open, further supplement of the present invention further open in this diagram referring to figs. 1 through Fig. 5.
Claims (11)
1. the method at least one operational factor of the battery module (31) of definite battery system (40), in described battery system, multiple battery modules are arranged at least one batteries and can optionally access described batteries and bridge joint conductively in described batteries by controlling (43), it is characterized in that, in access or turn-off battery module and determine the described battery module voltage (U) of described battery module (31) and described battery module electric current (I) when (31), in response to described access or described shutoff and the curve (U/V drawing, I/A), and based on determined curve (U/V, I/A) implement the calculating of the described operational factor of corresponding battery module (31).
2. method according to claim 1, wherein, described at least one operational factor comprises the internal resistance (R of described battery module (31)
i) and/or electrical power (P).
3. method according to claim 1 and 2, wherein, implements multiple synchronous measurements in succession of described battery module voltage (U) and described battery module electric current (I) according to the switch of described battery module.
4. according to method in any one of the preceding claims wherein, wherein, by repeatedly, preferably connect described multiple battery module (31) in periodic mode and with order given in advance, carry out correspondingly repeatedly to implement determining of described operational factor for each battery module (31).
5. according to method in any one of the preceding claims wherein, wherein, in the time that the charged state of battery module (31) reaches a state-of-charge value in definite state-of-charge value or multiple definite state-of-charge value, then carry out respectively described method.
6. according to method in any one of the preceding claims wherein, wherein, during charging process or during the discharge process of described battery module (31), implementing described method.
7. a battery system (40), it has at least one batteries with multiple battery modules (31) respectively, described multiple battery module can optionally access described batteries or bridge joint conductively in described batteries by controlling, wherein, measurement mechanism (41) and described battery system (40) that at least one battery module in described battery module (31) is provided with for determining battery module voltage (U) and battery module electric current (I) also comprise the control device (42) for controlling described battery module (31) and described measurement mechanism, it is characterized in that, described battery system (40) has the analytical equipment (44) for analyzing the measurement being realized by described measurement mechanism (41) and is set to so implement described analysis and described control (43), when making in the access of battery module (31) and turn-offing, automatically determine and draw in response to described access and the described shutoff of described battery module respectively, curve (the U/V of battery module voltage (U) and battery module electric current (I), I/A).
8. battery system according to claim 7 (40), wherein, described analytical equipment (44) is set to determine according to definite curve (U/V, I/A) of described battery module voltage (U) and described battery module electric current (I) the current value of at least one predetermined operational factor of described battery module (31).
9. battery system according to claim 8 (40), wherein, described battery system (40) has diagnostic device, and described diagnostic device is set to based on according to the different curve of the described battery module voltage (U) of described battery module (31) and described battery module electric current (I) and the ageing state in storage battery list pond (11) of determining over time described battery module (31) of multiple values of definite described at least one predetermined operational factor.
10. a motor vehicle, it comprise motor and according to described in any one in claim 7 to 9, for taking electric energy as motor (13) power supply battery system (40).
11. 1 kinds of static systems, described system comprises according to battery system (40) described in any one in claim 7 to 9, for powering taking electric energy as electric loading.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| DE102013206942.1A DE102013206942A1 (en) | 2013-04-17 | 2013-04-17 | Battery system with arranged in a battery string battery modules and method for determining at least one operating parameter of a battery module of the battery system |
| DE102013206942.1 | 2013-04-17 |
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| CN104113101A true CN104113101A (en) | 2014-10-22 |
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| CN (1) | CN104113101A (en) |
| DE (1) | DE102013206942A1 (en) |
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| CN109391002A (en) * | 2017-08-11 | 2019-02-26 | 德国福维克控股公司 | The housed device run by battery and the method for running housed device |
| CN109693557A (en) * | 2018-12-29 | 2019-04-30 | 苏州唯控汽车科技有限公司 | Multiple battery uses modular stages with and hangs together carrier vehicle inverter system |
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| TR201516481A2 (en) * | 2015-12-21 | 2017-07-21 | Istanbul Okan Ueniversitesi | Internal resistance measurement method for power supplies like batteries or supercapacitors |
| CN107128185B (en) * | 2016-02-29 | 2020-06-16 | 华为技术有限公司 | Motor drive device and electric automobile |
| CN115923539A (en) * | 2021-09-23 | 2023-04-07 | 沃尔沃汽车公司 | Battery Control with Offset Correction |
| DE102022200345A1 (en) | 2022-01-14 | 2023-07-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | battery |
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| DE102013206942A1 (en) | 2014-10-23 |
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