CN105954592B - A kind of power battery pack internal resistance measurement system - Google Patents
A kind of power battery pack internal resistance measurement system Download PDFInfo
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- CN105954592B CN105954592B CN201610571445.4A CN201610571445A CN105954592B CN 105954592 B CN105954592 B CN 105954592B CN 201610571445 A CN201610571445 A CN 201610571445A CN 105954592 B CN105954592 B CN 105954592B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
Abstract
The invention provides a kind of power battery pack internal resistance measurement system, including：Measuring loop and internal resistance measurement unit；The measuring loop includes mesuring battary group；The internal resistance measurement unit is used for the voltage-frequency signal and current frequency signal for measuring the mesuring battary group, and the AC internal Resistance for obtaining the mesuring battary group is calculated according to the voltage-frequency signal and the current frequency signal.A kind of power battery pack internal resistance measurement system that the embodiment of the present invention is provided, can realize the measurement to battery pack internal resistance and calculating, and the status information and working condition for understanding battery pack in time provide reference frame.
Description
Technical field
The present invention relates to internal resistance measurement technical field, in particular to a kind of power battery pack internal resistance measurement system.
Background technology
At present, in power battery pack application field, such as new energy car, hybrid electric vehicle, electric train, electric bicycle
Deng, and oceanographic equipment and underawater ordnance equal energy source field, it is required to the energy storage unit being made up of various types of batteries；
During electrokinetic cell use, for ease of managing battery system, it is to be understood that the internal resistance of cell, to understand battery pack in time
Status information and working condition, for keep battery be in it is good in the state of be operated state and provide safeguard；But it is existing
Have and do not occur also a kind of can effectively carrying out the device or system of battery pack internal resistance measurement in technology.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of power battery pack internal resistance measurement system, to solve
Above mentioned problem.
First, in a first aspect, the embodiments of the invention provide a kind of power battery pack internal resistance measurement system, including：
Measuring loop and internal resistance measurement unit；
The measuring loop includes mesuring battary group；
The internal resistance measurement unit is used for the voltage-frequency signal and current frequency signal for measuring the mesuring battary group, and
The AC internal Resistance for obtaining the mesuring battary group is calculated according to the voltage-frequency signal and the current frequency signal.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the first of above-mentioned first aspect, its
In：
The system also includes：Battery monitor unit, enters for voltage and temperature to battery cell in the battery pack
Row monitoring.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of second of above-mentioned first aspect, its
In：
The system, in addition to：Internal communication unit；
The internal communication unit is used to realize the inside between the battery monitor unit and the internal resistance measurement unit
Communication.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the third of above-mentioned first aspect, its
In：
The internal resistance measurement unit includes：Front end circuit, wave filter and amplifier；
The front end circuit, the wave filter, the amplifier cooperate to extract the measuring loop battery pack
Voltage-frequency signal and current frequency signal, and compression noise signal.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 4th of above-mentioned first aspect kind, its
In：
The internal resistance measurement unit also includes：First processor, the first processor is connected with the driving amplifier
Connect；
The first processor control is sampled to the voltage-frequency signal and the current frequency signal, calculated,
And the AC internal Resistance for obtaining the mesuring battary group is calculated according to the voltage-frequency signal and the current frequency signal.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 5th of above-mentioned first aspect kind, its
In：
The front end circuit includes：Signal coupler；
The first processor sends resistance measuring signals, and the resistance measuring signals are carried out by the driving amplifier
Signal amplifies, and the resistance measuring signals after signal amplification are transferred into signal coupler, and are transmitted by signal coupler
To the measuring loop.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 6th of above-mentioned first aspect kind, its
In：
The internal communication unit includes：Communication processing circuit；
The communication signal of transmission is carried out digit synthesis, generation respective frequencies letter by the internal communication unit by processor
After number, all frequency signals are superimposed, after amplifying by driving amplifier, frequency signal hair will be superimposed by signal coupler
Measuring loop is sent to, the transmission of communication signal is realized；
The internal communication unit extracts different frequencies respectively by signal coupler, front end circuit, wave filter and amplifier
Rate communication signal, is then transformed to serial digital signal or parallel digital signal by Communication processing circuit by frequency signal, then
This data signal is received by another processor, the reception of communication signal is realized；Or amplifier is directly gathered by another processor
Output signal, by calculating communication signal, realize communication signal receive.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 7th of above-mentioned first aspect kind, its
In：
The first processor is also connected with isolating communication element, and the first processor passes through the isolation communication member
Part carries out communication with the system peripherals and is connected.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 8th of above-mentioned first aspect kind, its
In：
The isolation communication element includes：CAN/485 communication interfaces.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 9th of above-mentioned first aspect kind, its
In：
The measuring loop also includes：
First electric capacity, the first inductance, the second electric capacity and the second inductance, the branch after the first electric capacity and the first inductance series connection
Road connected with the second electric capacity and the second inductance after branch circuit parallel connection, on the branch road after second electric capacity and the second inductance series connection also
It is provided with switch；Now the measuring loop is used to realize internal resistance measurement and internal communication；
Or,
The measuring loop also includes：The series circuit of inductance, electric capacity and switch composition, it is now described by being connected in parallel on
The electrical equipment communication at the series circuit two ends of inductance, electric capacity and switch composition.
A kind of power battery pack internal resistance measurement system provided in the embodiment of the present invention, electricity to be measured is measured by measuring unit
The voltage-frequency signal and current frequency signal of pond group, and calculated according to the voltage-frequency signal and current frequency signal
To the AC resistance of mesuring battary group, the embodiment of the present invention can realize the measurement to battery pack internal resistance and calculating, be in time
The status information and working condition of electrolytic cell group provide reference frame.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of structural representation for power battery pack internal resistance measurement system that the embodiment of the present invention one is provided
Figure；
Fig. 2 shows a kind of structural representation for power battery pack internal resistance measurement system that the embodiment of the present invention two is provided
Figure；
Fig. 3 shows a kind of structural representation for power battery pack internal resistance measurement system that the embodiment of the present invention three is provided
Figure.
Fig. 4 shows a kind of structural representation for power battery pack internal resistance measurement system that the embodiment of the present invention four is provided
Figure；
Fig. 5 shows a kind of structural representation for power battery pack internal resistance measurement system that the embodiment of the present invention five is provided
Figure.
Illustrate：
110- measuring loops；120- internal resistance measurement units；130- internal communication units；140th, battery monitor unit；
100- mesuring battary groups；The electric capacity of 101- first；The inductance of 102- first；The electric capacity of 103- second；The inductance of 104- second；
107- electric capacity；108- inductance；105- is switched；207- first processors；307- second processors；The signal couplers of 201- first；
202- secondary signal couplers；203- communications receive coupling coil；204- internal resistance measurements receive coupling coil；The signals of 301- the 3rd
Coupler；The signal couplers of 302- the 4th；209- isolates communication element.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than whole embodiments.The present invention being generally described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and be designed with a variety of configurations.Therefore, it is of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on embodiments of the invention, the institute that those skilled in the art are obtained on the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
At present, in the application process of power battery pack, for ease of managing battery system and monitoring, it is to be understood that battery
Internal resistance, to understand the status information and working condition of battery pack in time；In view of this, the one kind provided in the embodiment of the present invention
Power battery pack internal resistance measurement system is to solve the above problems.
A kind of power battery pack internal resistance measurement system is provided in embodiment as shown in Figure 1, the present embodiment, including：
Measuring loop 110 and internal resistance measurement unit 120；
Above-mentioned measuring loop 110 includes mesuring battary group；
Above-mentioned internal resistance measurement unit 120 is used for the voltage-frequency signal for measuring above-mentioned mesuring battary group and power frequency letter
Number, and the AC internal Resistance for obtaining mesuring battary group is calculated according to the voltage-frequency signal and current frequency signal.
A kind of power battery pack internal resistance measurement system in the present embodiment, can realize and battery pack internal resistance is measured,
Use state information for understanding power battery pack provides foundation.
In reality, weigh battery pack working condition have two key factors one be temperature another be voltage；Therefore,
A kind of power battery pack internal resistance measurement system provided in embodiment as shown in Figure 2, the present embodiment, in addition to：Battery is supervised
Unit 140, internal communication unit 130 are surveyed, battery monitor unit 140 is used to enter the voltage and temperature of battery cell in battery pack
Row monitoring, the internal communication unit 130 is interior between the battery monitor unit 140 in system and internal resistance measurement unit for realizing
Portion is communicated.
Surveyed it should be noted that only illustrating one of battery monitor unit 140 in the embodiment of accompanying drawing 2 with internal resistance
Measure and be not limited thereto in unit, internal communication unit, the connection status of measuring loop, practical application.
In a kind of power battery pack internal resistance measurement system provided in embodiment as shown in Figure 3, the present embodiment, including survey
Loop, internal resistance measurement unit, battery monitor unit and internal communication unit are measured, measuring loop includes mesuring battary group, and internal resistance is surveyed
Amount unit is used for the voltage-frequency signal and current frequency signal for measuring mesuring battary group, and according to the voltage-frequency signal and electricity
Stream frequency signal calculates the AC internal Resistance for obtaining mesuring battary group, and internal communication unit is used to realize that the inside of whole system to lead to
News.
Above-mentioned internal resistance measurement unit includes：Front end circuit, wave filter and amplifier；Front end circuit, wave filter, amplifier phase
Mutually coordinate to extract the voltage-frequency signal and current frequency signal of measuring loop battery pack, and compression noise signal.
Above-mentioned internal resistance measurement unit also includes：First processor；The first processor is controlled to voltage-frequency signal and electricity
Stream frequency signal is sampled, calculated, and obtains mesuring battary group according to voltage-frequency signal and current frequency signal calculating
AC internal Resistance；First processor is also associated with driving amplifier；The driving amplifier is used for the output signal to first processor
Carry out signal enhanced processing.
Above-mentioned front end circuit includes：Signal coupler；The signal coupler is connected with measuring loop, first processor hair
Go out resistance measuring signals, resistance measuring signals carry out signal amplification through overdriven amplifier, the resistance after signal amplification
Measurement signal is transferred into signal coupler, and transmits (or perhaps coupling) to measuring loop by signal coupler.
Further, as shown in figure 3, being illustrated in the present embodiment exemplified by being provided with a battery monitor unit, its
Middle internal resistance measurement unit includes：First processor 207, battery monitor unit includes：Second processing 307；It should be noted that electric
The quantity of pond group internal cell monomer to be multiple, therefore during practical application battery monitor unit quantity it can also be provided that many
Individual, this embodiment carries out internal communication between battery monitor unit and internal resistance measurement unit only by taking a battery monitor unit as an example
Introduction.
Further, measuring loop includes：Mesuring battary group 100, the first electric capacity 101, the first inductance 102, the second electric capacity
103 and second inductance 104, branch road and the second electric capacity 103 and the second inductance after the first electric capacity 101 and the series connection of the first inductance 102
Switch 105 is additionally provided with branch road after branch circuit parallel connection after 104 series connection, the second electric capacity 103 and the series connection of the second inductance 104；Enter
One step, multiple signal couplers are also associated with the measuring loop；Closure switch 105 are needed when carrying out internal resistance measurement.
For ease of being described in detail, above-mentioned multiple couplers are divided into：First signal coupler 201, secondary signal
Coupler 202, the 3rd signal coupler 301 and the 4th signal coupler 302；It should be noted that herein by way of example only,
This programme is during actually realizing, the quantity of signal coupler is not limited thereto, therefore above-mentioned dividing mode can not be seen
Work is the restriction to technical scheme.
It is above-mentioned battery pack internal resistance is measured during, first, first processor 207 send resistance measuring signals, should
Resistance measuring signals carry out signal amplification through overdriven amplifier, the resistance measuring signals driving the after signal enhanced processing
One signal coupler 201, and couple a signal to measuring loop by first signal coupler 201；With mesuring battary group 100
The preamplifier being connected, the preamplifier being connected with secondary signal coupler 202 carry out preposition place to signal respectively
Reason, then respectively through respective wave filter, the processing of amplifier after, finally respectively obtain voltage-frequency signal and power frequency letter
Number.
Above-mentioned signal coupler can use traditional signal coupler in actual use, can also use including two
Individual open stich, and further, can be used by the signal coupler of the structure type snapped connection between open stich
The signal coupler being made by soft magnetic materials, not in this to go forth；Preferably, in the present embodiment using working signal
Signal coupler of the frequency between 500 hertz -50 megahertzs.
In above-mentioned measuring loop, conductor impedance value is fixed value, the size of current frequency signal and the relation of the internal resistance of cell
Meet below equation：
In above formula, R is the AC internal Resistance of battery pack, and U is alternating voltage, and I alternating currents, RL is line impedance,For series resonant impedance；
When the timings of alternating voltage U mono-, the proportional relation of impedance loop in loop where current frequency signal and battery pack, because
This, can also use above-mentioned formula to realize and the AC internal Resistance of battery pack is accurately measured.
A kind of power battery pack internal resistance measurement system provided in above-described embodiment, using the relatively low preposition electricity of price
Road, wave filter and amplifier realize the extraction of voltage-frequency signal and current frequency signal, and then realize the survey of battery pack internal resistance
Amount；With signal extraction is quick, measurement is accurate and the low good effect of cost.
It should be noted that the battery described in the present embodiment refers to that energy deposits several equipment, including lead-acid battery, lithium electricity
Pond, super capacitor and other kinds of energy storage equipment.
Above-mentioned middle internal resistance measurement system is not only applicable to the measurement of power battery pack internal resistance, can also be applied to as electric capacity
Deng the internal resistance measurement of other electricity components with resistance, therefore technical scheme is in other same or similar skills
The application in art field should be all included within the scope of the present invention.
When being provided with multiple battery monitor units, it is necessary to meet between each battery monitor unit and internal resistance measurement unit
It can be communicated, but in existing battery set management branch measuring system, its internal communication is all the CAN using isolation
Bus is communicated, and must connect the voltage and temperature measurement equipment of each battery cell in such a mode using CAN,
Often cause that measurement lead is long, bus is excessive, and circuit is too fat to move, connects up the defect such as cumbersome, influence the reliability of system and succinct
Property.
It can use and be surveyed using power battery pack in a kind of battery pack internal resistance measurement system provided in the embodiment of the present invention
Realize that the measuring loop in communication transfer, i.e. the present embodiment can both be used for carrying out battery pack internal resistance as conductor in itself in amount loop
Measurement, may also be used for realizing the internal communication between system inner treater, it macroscopically can be regarded as by a wire
The transmission of progress；
Above-mentioned internal communication unit includes：Communication processing circuit；
During being communicated, by taking the communication of first processor to second processor as an example, internal communication unit leads to
Cross first processor 207 to carry out the communication signal of transmission after digit synthesis, generation respective frequencies signal, by all frequency signals
Superposition, after amplifying by driving amplifier, measuring loop is sent to by the first signal coupler 201 by frequency signal is superimposed,
Realize the transmission of communication signal；
Internal communication unit extracts difference respectively by the 4th signal coupler 302, front end circuit, wave filter and amplifier
Frequency communication signal, is then transformed to serial digital signal or parallel digital signal by Communication processing circuit by frequency signal,
This data signal is received by second processor 307 again, the reception of communication signal is realized；Or directly gathered and put by second processor
The output signal of big device, by calculating communication signal, realizes that communication signal is received.
Further by taking two-way communication signal as an example, scheme is described below：
By taking first processor 207 as an example, first, first processor 207 sends communication frequency signal f1With frequency signal f2Arrive
Driving amplifier, is equally carried out to communication frequency signal f by driving amplifier1With frequency signal f2Signal enhanced processing is carried out, is driven
Amplifier is moved by the communication frequency signal f after amplification1With frequency signal f2The first signal coupler 201 is sent to, first is believed by this
The signal is further coupled in measuring loop by number coupler 201, and now measuring loop is i.e. as order circuit, with the 4th letter
The preamplifier that number coupler 302 is connected carries out preposition processing to this signal, then after filtering device, at amplifier
Frequency signal f is respectively obtained after reason1With frequency signal f2, now second processor 307 by analog-digital converter to the frequency believe
Number f1With frequency signal f2Sampled, obtain digital fre-quency signal f1With digital fre-quency signal f2, become several by continuous signal
Word signal, further, can also be by Communication processing circuit by digital fre-quency signal f1With digital fre-quency signal f2Generation is serial
Either parallel digital signal is sent to second processor or directly gathers preamplifier by second processor data signal
Output signal, by calculating communication signal, realizes that communication signal is received, and then realize first processor and second processor
Between digital communication.
It should be noted that above-mentioned be only illustrated with frequency signal f1 and frequency signal f2, but in practical application
When, it is not limited to only frequency signal f1 and frequency signal f2, can be channelized frequencies signal；And if processor is used
When multifrequency signal is sent, Communication processing circuit can be now omitted, multifrequency signal is calculated by processor collection, drawn
Corresponding communication signal；Therefore the content in above-described embodiment is not to be taken as the limitation of technical scheme content.
Can mutually it be communicated between above-mentioned each processor, such as second processor can also send communication frequency letter
Number f1With frequency signal f2, carry out from second processor to the digital communication in first processor direction.
Battery monitor unit in above-described embodiment, for carrying out voltage and/or temperature to the battery cell of battery pack
Measurement, the voltage balance management carried out in battery pack between battery cell can be met by carrying out voltage measurement, for example, can pass through
In the following manner is carried out：The average voltage of battery cell is calculated, resistance is carried out for the battery cell more than average voltage certain value
Electric discharge, discharges until this battery cell voltage drops to off resistance after setting, to realize that battery voltage balanced is managed.
Further, the battery balanced management of above-mentioned battery management unit can also be accomplished by the following way：Using
LTC8403, LTC8404, AD7280 etc. chip are realized.
Temperature survey of the above-mentioned progress to battery cell, can effectively be supervised to the security during battery use
Control, can be pointed out when temperature exceedes early warning value, prevent battery from occurring the phenomenons such as self-firing and self-explosion because temperature is too high.
Measuring loop in example IV as shown in Figure 4, the present embodiment includes：Inductance 108, electric capacity 107 and switch
The series circuit of composition, the measuring loop is used for the measurement for carrying out battery pack internal resistance, now by being connected in parallel on the inductance, electric capacity
And the electrical equipment at the series circuit two ends of switch composition is communicated, that is, utilize comprising composition including switch, inductance and electric capacity
Measuring loop realize battery pack internal resistance measurement；Utilize the inside that whole system is realized comprising the order circuit for being supported on interior composition
Communication.
Example five as shown in Figure 5, on the basis of example IV, to distinguish internal resistance measurement and communication, by secondary signal
The coil of coupler is divided into internal resistance measurement and receives coupling coil 204 and communication reception coupling coil 203, then connects preposition amplification
The loops such as device, realize battery pack internal resistance measurement and internal communication.
In above-described embodiment three, in communication process, the first electric capacity, the first inductance, the second electric capacity and the second inductance are utilized
The measuring loop of composition is used as order circuit；It is more succinct for ease of system in example IV, five, only needing to inside progress
The first electric capacity, the first inductance, the second electric capacity and the second inductance are omitted during communication, and uses and is connected in parallel on inductance and electric capacity series loop
The order circuit that the load (such as engine electrical equipment) at two ends is constituted, makes communication system more succinct.
In addition, first processor above-mentioned in application scheme, second processor and its peripheral circuit can pass through collection
Mode into chip is realized.
In a kind of power battery pack internal resistance measurement system provided in the embodiment of the present invention, except that can realize in battery
Beyond resistance is measured, have further the advantage that：
1st, the security monitoring management of battery cell voltage balance management and battery pack in battery pack is realized.
2nd, communication (or perhaps being used as order circuit by the use of measuring loop) is realized as conductor in itself by the use of electrokinetic cell,
Isolating problem is solved, the use of CAN is turn avoid, measurement and communication line is greatly decreased, circuit is clean and tidy；
3rd, connect up simply, the workload of later maintenance and maintenance is small, reduces cost；
4th, the reliability of power battery pack internal resistance measurement system is greatly improved.
Further, the first processor in above-described embodiment is also connected with isolating communication element 209, and processor passes through
The isolation communication element 209 carries out communication with the system external equipment and is connected.
The data that second processor is collected can be sent to first processor by internal communication unit, further by
First processor is sent to system peripherals by isolating communication element, such as the equipment such as host computer.
In a certain specific embodiment, it is preferable that above-mentioned isolation communication element includes：CAN/485 communication interfaces.
It should be noted that the scheme of the application only illustrates how to realize battery pack internal resistance measurement, and realize battery
The structure of the internal communication of group internal resistance measurement system and the side that internal resistance of cell measurement and internal communication are realized on this architecture basics
Method, for the adjustment carried out on this basis, such as increases multiple filter, increase protection circuit or other accessory circuits,
To realize better performance and function, or based on calculating data using this invention, the post-processing of computational methods is carried out,
Battery pack dump energy is realized, it is allowed to the scheme that the parameter such as charge-discharge electric power, residual life is calculated, in this protection domain.
In addition, the means of communication that the internal communication unit of the present invention is used, which are applied to frequency modulation, modulates (FSK) communication mode,
Communication, or multi-carrier frequency communication modes (FDM), quadrature multi-carrier communication side can also be realized using phase modulation (PSK) mode
Formula (OFDM), the communication modulation system of amplification on this basis, and corresponding circuit all fall in the scope of protection of the present invention.
It should be noted that in the description of inventive embodiments, term " first ", " second ", " the 3rd ", " the 4th " only use
In description purpose, and it is not intended that indicating or implying relative importance.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " connected ", " company
Connect " it should be interpreted broadly, for example, it may be electrical connection, can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
If the function that the system is realized realized using in the form of SFU software functional unit and as independent production marketing or
In use, can be stored in a computer read/write memory medium.Understood based on such, technical scheme sheet
The part contributed in other words to prior art in matter or the part of the technical scheme can in the form of software product body
Reveal and, the computer software product is stored in a storage medium, including some instructions are to cause embedded computer
Equipment (can also be computer, server, or network equipment etc.) performs the whole of each embodiment methods described of the invention
Or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of power battery pack internal resistance measurement system, it is characterised in that including：Measuring loop, internal resistance measurement unit, battery prison
Survey unit and internal communication unit；
The measuring loop includes mesuring battary group；
Voltage-frequency signal and current frequency signal of the internal resistance measurement unit for measuring the mesuring battary group, and according to
The voltage-frequency signal and the current frequency signal calculate the AC internal Resistance for obtaining the mesuring battary group；
The battery monitor unit is used to be monitored the voltage and temperature of battery cell in the battery pack；
The internal communication unit is used to realize the internal communication between the battery monitor unit and the internal resistance measurement unit；
Further, the measuring loop also includes：
First electric capacity, the first inductance, the second electric capacity and the second inductance, branch road after first electric capacity and the first inductance series connection with
Also set up on branch circuit parallel connection after second electric capacity and the series connection of the second inductance, the branch road after the second electric capacity and the second inductance series connection
There is switch；Now the measuring loop is used to realize internal resistance measurement and while realizes internal communication as order circuit；
Or,
The measuring loop also includes：The series circuit of inductance, electric capacity and switch composition, now by being connected in parallel on the electricity
The electrical equipment at the series circuit two ends of sense, electric capacity and switch composition is communicated.
2. power battery pack internal resistance measurement system according to claim 1, it is characterised in that the internal resistance measurement unit bag
Include：Front end circuit, wave filter and amplifier；
The front end circuit, the wave filter, the amplifier cooperate to extract the voltage of the measuring loop battery pack
Frequency signal and current frequency signal, and compression noise signal.
3. power battery pack internal resistance measurement system according to claim 2, it is characterised in that the internal resistance measurement unit is also
Including：First processor, the first processor is connected with driving amplifier；
The first processor control is sampled to the voltage-frequency signal and the current frequency signal, calculated, and root
The AC internal Resistance for obtaining the mesuring battary group is calculated according to the voltage-frequency signal and the current frequency signal.
4. power battery pack internal resistance measurement system according to claim 3, it is characterised in that the front end circuit includes：
Signal coupler；
The first processor sends resistance measuring signals, and the resistance measuring signals carry out signal by the driving amplifier
Amplification, the resistance measuring signals after signal amplification are transferred into signal coupler, and are transferred to institute by signal coupler
State measuring loop.
5. the power battery pack internal resistance measurement system according to right wants 4, it is characterised in that the internal communication unit bag
Include：Communication processing circuit；
The communication signal of transmission is carried out digit synthesis by the internal communication unit by processor, generates respective frequencies signal
Afterwards, all frequency signals are superimposed, after being amplified by driving amplifier, be sent to by signal coupler by frequency signal is superimposed
Measuring loop, realizes the transmission of communication signal；
The internal communication unit extracts different frequencies respectively by the signal coupler, front end circuit, wave filter and amplifier
Rate communication signal, is then transformed to serial digital signal or parallel digital signal by Communication processing circuit by frequency signal, then
This data signal is received by another processor, the reception of communication signal is realized；Or amplifier is directly gathered by another processor
Output signal, by calculating communication signal, realize communication signal receive.
6. power battery pack internal resistance measurement system according to claim 3, it is characterised in that the first processor also with
Isolation communication element is connected, and the first processor is led to by the isolation communication element with the system peripherals
News connection.
7. power battery pack internal resistance measurement system according to claim 6, it is characterised in that the isolation communication element bag
Include：CAN/485 communication interfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610571445.4A CN105954592B (en) | 2016-07-18 | 2016-07-18 | A kind of power battery pack internal resistance measurement system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610571445.4A CN105954592B (en) | 2016-07-18 | 2016-07-18 | A kind of power battery pack internal resistance measurement system |
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| CN108152753A (en) * | 2017-12-30 | 2018-06-12 | 天津华庆百胜能源有限公司 | A kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series |
| US20210172905A1 (en) * | 2018-01-04 | 2021-06-10 | Lyten, Inc. | Sensing device for detecting analytes in batteries |
| US10948547B2 (en) * | 2018-11-23 | 2021-03-16 | Lg Chem, Ltd. | Battery monitoring system |
| CN109444598B (en) * | 2018-11-30 | 2021-07-02 | 广东电网有限责任公司 | Performance test method of super capacitor |
| CN114061793A (en) * | 2021-12-17 | 2022-02-18 | 中国电信股份有限公司 | Calibration device and calibration method for temperature sensor |
| CN116331060B (en) * | 2023-05-25 | 2023-09-05 | 苏州清研精准汽车科技有限公司 | Power battery, data measurement method thereof and vehicle |
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| CN102866362B (en) * | 2012-09-27 | 2015-04-15 | 重庆大学 | Electric vehicle power battery impedance characteristic measuring method |
| CN203299350U (en) * | 2013-05-08 | 2013-11-20 | 山西大学 | Battery internal resistance on-line measuring instrument |
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