CN108680803A - Support the battery analog system and method for BMS active equalization functional tests - Google Patents
Support the battery analog system and method for BMS active equalization functional tests Download PDFInfo
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- CN108680803A CN108680803A CN201810420493.2A CN201810420493A CN108680803A CN 108680803 A CN108680803 A CN 108680803A CN 201810420493 A CN201810420493 A CN 201810420493A CN 108680803 A CN108680803 A CN 108680803A
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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
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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
- G01R31/40—Testing power supplies
Abstract
The invention discloses a kind of battery analog systems for supporting BMS active equalization functional tests; its main control module is used to convey adjustable linear electric power output voltage setting value and adjustable linear power supply overcurrent protection setting value to adjustable linear power supply, loads conveying impedance adjustable load voltage setting value to impedance adjustable and impedance adjustable load overcurrent protects setting value；Adjustable linear power supply keeps system output voltage equal with adjustable linear electric power output voltage setting value, and set corresponding overcurrent protection thresholding for exporting corresponding voltage；Impedance adjustable load regulation direct impedance makes system output voltage stabilization in impedance adjustable load voltage setting value, and sets overcurrent protection thresholding.The present invention realizes the requirement of simulated battery voltage and euqalizing current two-way flow.
Description
Technical field
The present invention relates to battery management system technical field of measurement and test, are surveyed in particular to a kind of support BMS active equalization functions
The battery analog system and method for examination.
Background technology
Battery management system (BMS, BATTERY MANAGEMENT SYSTEM) is the important of electric vehicle and energy-storage system
Component part comes simulated battery voltage, this mode pair in test b MS functions usually using high-precision variable voltage source at present
It is feasible in using passive balanced battery management system, but the battery management system with active equalization function cannot be met
The testing requirement of system.For using passive balanced battery management system, when at equilibrium, internal balance circuit is suitable
In a resistive load, therefore only need, by variable voltage source simulated battery voltage, to provide enough euqalizing currents when test
.However for having the battery management system of active equalization function, equalization function has charge balancing and equalization discharge two
Kind of state, when in equalization discharge state, battery management system internal balance circuit is equivalent to a Constant Current Load, using can
Adjust voltage source that can also realize test；When in charge balancing state, battery management system internal balance circuit is equivalent to one
A constant-current supply can not be completed to test using variable voltage source due to that cannot absorb euqalizing current.
Currently, the battery management system with active equalization function is generally tested using conventional batteries, however
The voltage of battery cannot adjust at any time as needed so that test process is relatively complicated, affects the test of battery management system
Efficiency.
Invention content
Present invention aim to provide a kind of battery analog system that supporting BMS active equalization functional tests and side
Method, it uses a kind of mode that adjustable linear power supply and tunable load are combined, and active equalization function survey is carried out using the present invention
When examination, that is, the requirement of simulated battery voltage is realized, and realizes the requirement of euqalizing current two-way flow.
In order to achieve this, the battery analog system of the support BMS active equalization functional tests designed by the present invention, including
Main control module, adjustable linear power supply, impedance adjustable load and voltage sample module, main control module are used for defeated to adjustable linear power supply
Adjustable linear electric power output voltage setting value and adjustable linear power supply overcurrent protection setting value are sent, and defeated to impedance adjustable load
Impedance adjustable load voltage setting value and impedance adjustable load overcurrent is sent to protect setting value；
Voltage sample module conveys voltage sample value for acquiring the battery analog system output end voltage respectively
It is loaded to adjustable linear power supply and impedance adjustable；
Adjustable linear power supply is used to be adopted according to the voltage that adjustable linear electric power output voltage setting value and sampling module export
The comparison result of sample value exports corresponding voltage, and control voltage sample value is equal with adjustable linear electric power output voltage setting value,
And corresponding overcurrent protection thresholding is set according to adjustable linear power supply overcurrent protection setting value；
Impedance adjustable load according to the voltage of impedance adjustable load voltage setting value and the output of voltage sample module for adopting
The comparison result dynamic regulation direct impedance of sample value makes the battery analog system output end voltage stablize and is loaded in impedance adjustable
Voltage setting value, and protect setting value to set corresponding overcurrent protection thresholding according to impedance adjustable load overcurrent.
First current sampling module is for acquiring adjustable linear power output end electric current, and by adjustable linear power output end
Electric current is transferred to adjustable linear power supply, and the adjustable linear power supply is by adjustable linear power output end electric current and adjustable linear power supply
Overcurrent protection setting value is compared, when the adjustable linear adjustable linear power supply overcurrent protection setting values of power output end electric current ＜
When, the comparison knot for the voltage sample value that adjustable linear power supply is exported by adjustable linear electric power output voltage setting value and sampling module
Fruit exports corresponding voltage, and control voltage sample value is equal with adjustable linear electric power output voltage setting value；When adjustable linear electricity
When source output terminal electric current >=adjustable linear power supply overcurrent protection setting value, the output of adjustable linear power supply is by adjustable linear power supply mistake
The comparison result control of stream protection setting value and adjustable linear power output end electric current, makes the output current etc. of adjustable linear power supply
In adjustable linear power supply overcurrent protection setting value.
Second current sampling module is used to acquire the electric current for flowing through impedance adjustable load, and will flow through impedance adjustable load
Electric current is transferred to impedance adjustable load, and impedance adjustable load will flow through the electric current and impedance adjustable load overcurrent of impedance adjustable load
Protection setting value is compared, when the electric current ＜ impedance adjustable load overcurrents for flowing through impedance adjustable load protect setting value, resistance
The comparison result for the voltage sample value that the impedance of anti-tunable load is exported by impedance adjustable load voltage setting value and sampling module
Carry out dynamic regulation, the battery analog system output end voltage is made to stablize in impedance adjustable load voltage setting value；It is hindered when flowing through
When the electric current of anti-tunable load >=impedance adjustable load overcurrent protection setting value, the impedance of impedance adjustable load is born by impedance adjustable
It carries overcurrent protection setting value and flows through the comparison result of the electric current of impedance adjustable load to control, to which tunable load will be flowed through
Current limit protects setting value in impedance adjustable load overcurrent.
A kind of battery simulation method of above system, which is characterized in that it includes the following steps：
Step 1：The main control module conveys adjustable linear electric power output voltage setting value and adjustable to adjustable linear power supply
Linear power supply overcurrent protection setting value, and it is negative to impedance adjustable load conveying impedance adjustable load voltage setting value and impedance adjustable
Carry overcurrent protection setting value；
Step 2：Voltage sample module acquires the battery analog system output end voltage, and voltage sample value difference is defeated
Give adjustable linear power supply and impedance adjustable load；
Step 3：The adjustable linear power supply is defeated according to adjustable linear electric power output voltage setting value and voltage sample module
The comparison result of the voltage sample value gone out exports corresponding voltage, and control voltage sample value is set with adjustable linear electric power output voltage
Definite value is equal, and sets corresponding overcurrent protection thresholding according to adjustable linear power supply overcurrent protection setting value；
Step 4：The voltage that impedance adjustable load is exported according to impedance adjustable load voltage setting value and voltage sample module
The comparison result dynamic regulation direct impedance of sampled value makes the battery analog system output end voltage stablize negative in impedance adjustable
Voltage setting value is carried, and protects setting value to set corresponding overcurrent protection thresholding according to impedance adjustable load overcurrent.
Step 5：First current sampling module acquires adjustable linear power output end electric current, and adjustable linear power supply is exported
End electric current is transferred to adjustable linear power supply, and the adjustable linear power supply is by adjustable linear power output end electric current and adjustable linear electricity
Source overcurrent protection setting value is compared, when the adjustable linear adjustable linear power supply overcurrent protection setting values of power output end electric current ＜
When, the comparison knot for the voltage sample value that adjustable linear power supply is exported by adjustable linear electric power output voltage setting value and sampling module
Fruit exports corresponding voltage, and control voltage sample value is equal with adjustable linear electric power output voltage setting value；When adjustable linear electricity
When source output terminal electric current >=adjustable linear power supply overcurrent protection setting value, the output of adjustable linear power supply is by adjustable linear power supply mistake
The comparison result control of stream protection setting value and adjustable linear power output end electric current, makes the output current etc. of adjustable linear power supply
In adjustable linear power supply overcurrent protection setting value；
The second current sampling module acquisition flows through the electric current of impedance adjustable load, and will flow through impedance adjustable load
Electric current is transferred to impedance adjustable load, and impedance adjustable load will flow through the electric current and impedance adjustable load overcurrent of impedance adjustable load
Protection setting value is compared, when the electric current ＜ impedance adjustable load overcurrents for flowing through impedance adjustable load protect setting value, resistance
The comparison result for the voltage sample value that the impedance of anti-tunable load is exported by impedance adjustable load voltage setting value and sampling module
Carry out dynamic regulation, the battery analog system output end voltage is made to stablize in impedance adjustable load voltage setting value；It is hindered when flowing through
When the electric current of anti-tunable load >=impedance adjustable load overcurrent protection setting value, the impedance of impedance adjustable load is born by impedance adjustable
It carries overcurrent protection setting value and flows through the comparison result of the electric current of impedance adjustable load to control, to which tunable load will be flowed through
Current limit protects setting value in impedance adjustable load overcurrent；
Step 6：Voltage sample module is additionally operable to voltage sample value being transferred to main control module, and main control module is by by voltage
Sampled value is compared with adjustable linear electric power output voltage setting value and impedance adjustable load voltage setting value respectively, to sentence
Disconnected adjustable linear power supply and impedance adjustable load whether there is failure；
Adjustable linear power output end electric current is transferred to main control module by first current sampling module, and main control module is logical
It crosses and is compared adjustable linear power output end electric current with adjustable linear power supply overcurrent protection setting value, to judge adjustable line
Property power supply whether there is failure；
The electric current for flowing through impedance adjustable load is transferred to main control module by second current sampling module, and main control module is logical
It crosses and is compared the electric current for flowing through impedance adjustable load with impedance adjustable load overcurrent protection setting value, to judge that impedance can
Load is adjusted to whether there is failure.
The battery analog system of the present invention can adapt to the different working condition of mesuring battary management system automatically, including adopt
Sample, charge balancing and equalization discharge state, do not need artificial Setting pattern；In addition, carrying out active equalization function using the present invention
When test, the requirement of simulated battery voltage, also, charge balancing are realized to the control of output voltage by adjustable linear power supply
When, electric current flows into the impedance adjustable load of device from battery management system, and when equalization discharge, electric current enters from adjustable linear power flow
Battery management system.Meanwhile the present invention has overvoltage, overcurrent protection function by feedback current and voltage, has higher peace
Full reliability.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Rough schematic view when Fig. 2 is battery management system equalization discharge in the present invention.
Rough schematic view when Fig. 3 is battery management system charge balancing in the present invention.
In figure, 1-main control module, 2-adjustable linear power supplies, the load of 3-impedance adjustables, 4-voltage sample modules, 5-
First current sampling module, the 6-the second current sampling module, 7-isolated power supplies.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
A kind of battery analog system for supporting BMS active equalization functional tests shown in the present invention, as shown in Figure 1, it is wrapped
Include main control module 1, adjustable linear power supply 2, impedance adjustable load 3 and voltage sample module 4, the electricity of the adjustable linear power supply 2
Source signal input terminal connects power input by isolated power supply 7, and the adjustable linear electric power output voltage setting value of main control module 1 is defeated
Outlet connects the correspondence input terminal of adjustable linear power supply 2, main control module 1 with adjustable linear power supply overcurrent protection setting value output end
Impedance adjustable load voltage setting value output end and impedance adjustable load overcurrent protection setting value output end connect impedance adjustable
The load incoming end of the correspondence input terminal of load 3, impedance adjustable load 3 accesses battery analog system output end, and impedance adjustable is negative
3 ground terminal ground connection is carried, the collection terminal of voltage sample module 4 accesses between the output and ground of battery analog system, electricity
The voltage sample value output end of pressure sampling module 4 is separately connected main control module 1, adjustable linear power supply 2, impedance adjustable and loads 3
Voltage feedback signal input terminal；
The first current sampling module 5 is connected between 2 output end of adjustable linear power supply and battery simulating device output end
Sampling end, the sample rate current output end of the first current sampling module 5 are separately connected the of main control module 1 and adjustable linear power supply 2
One current sampling module feedback current communication ends are connected with the second electricity between the ground terminal and the earth of the impedance adjustable load 3
The sampling end of sampling module 6 is flowed, the sample rate current output end of the second current sampling module 6 is separately connected main control module 1 and impedance
Second current sampling module feedback current communication ends of tunable load 3.
Isolated power supply 7 converts the high voltage of external power supply input for realizing the isolation between outputting and inputting
To be suitble to the low-voltage of adjustable linear power supply.
The main control module 1 be used for adjustable linear power supply 2 convey adjustable linear electric power output voltage setting value Vset1 and
Adjustable linear power supply overcurrent protection setting value Iset1, main control module 1 are additionally operable to negative to 3 conveying impedance adjustable of impedance adjustable load
Carry voltage setting value Vset2 and impedance adjustable load overcurrent protection setting value Iset2；
Voltage sample module 4 is divided for acquiring the battery analog system output end voltage, and by voltage sample value Vsam
It is not conveyed to adjustable linear power supply 2 and impedance adjustable load 3；
The adjustable linear power supply 2 is used for defeated according to adjustable linear electric power output voltage setting value Vset1 and sampling module 4
The comparison result of the voltage sample value Vsam gone out exports corresponding voltage (simulated battery voltage), to form closed loop feedback, makes
System output terminal voltage Vsam and adjustable linear electric power output voltage setting value Vset1 are equal；Adjustable linear power supply 2 is additionally operable to root
According to adjustable linear power supply overcurrent protection setting value Iset1 set corresponding overcurrent protection thresholding (overcurrent protection threshold sets with can
Adjust linear power supply overcurrent protection setting value equal)；
The impedance adjustable load 3 is for defeated according to impedance adjustable load voltage setting value Vset2 and voltage sample module 4
The comparison result of the voltage sample value Vsam gone out carrys out dynamic regulation direct impedance, to form closed loop feedback, makes the battery mould
The voltage stabilization of quasi- system output is in impedance adjustable load voltage setting value Vset2；Impedance adjustable load 3 is additionally operable to according to resistance
Anti- tunable load overcurrent protection setting value Iset2 sets corresponding overcurrent protection thresholding, and (overcurrent protection thresholding is equal to impedance adjustable
Load overcurrent protects setting value Iset2), under normal circumstances, flow through the electric current ＜ impedance adjustable load overcurrents of impedance adjustable load 3
When protecting setting value Iset2, impedance adjustable load 3 is operated in constant pressure load model；When flow through impedance adjustable load 3 electric current >=
When protecting setting value Iset2 equal to impedance adjustable load overcurrent, tunable load is operated in Constant Current Load pattern, reaches overcurrent protection
Purpose.
In above-mentioned technical proposal, voltage sample module 4 is additionally operable to voltage sample value Vsam being transferred to main control module 1, main
Module 1 is controlled by bearing voltage sample value Vsam with adjustable linear electric power output voltage setting value Vset1 and impedance adjustable respectively
It carries voltage setting value Vset2 to be compared, to judge that adjustable linear power supply 2 and impedance adjustable load 3 whether there is failure.
In above-mentioned technical proposal, it further includes the first current sampling module 5, and first current sampling module 5 is for adopting
Collect 2 output end current Isam1 of adjustable linear power supply, and 2 output end current Isam1 of adjustable linear power supply is transferred to adjustable linear
Power supply 2, the adjustable linear power supply 2 set 2 output end current Isam1 of adjustable linear power supply with adjustable linear power supply overcurrent protection
Definite value Iset1 is compared, when the 2 adjustable linear power supply overcurrent protection setting values of output end current Isam1 ＜ of adjustable linear power supply
When Iset1, adjustable linear power supply 2 is adopted by the voltage that adjustable linear electric power output voltage setting value Vset1 and sampling module 4 export
The comparison result of sample value Vsam exports corresponding voltage, controls voltage sample value and adjustable linear electric power output voltage setting value phase
Deng at this point, adjustable linear power work is in voltage source mode；When 2 output end current Isam1 of adjustable linear power supply >=adjustable is linear
When power supply overcurrent protection setting value Iset1, the output of adjustable linear power supply 2 is by adjustable linear power supply overcurrent protection setting value
The comparison result of 2 output end current Isam1 of Iset1 and adjustable linear power supply controls, and makes the output current etc. of adjustable linear power supply 2
In adjustable linear power supply overcurrent protection setting value Iset1, have the function that overcurrent protection, linear power work adjustable at this time is in electricity
Flow source module.
In above-mentioned technical proposal, first current sampling module 5 is additionally operable to 2 output end current of adjustable linear power supply
Isam1 is transferred to main control module 1, and main control module 1 is by by 2 output end current Isam1 of adjustable linear power supply and adjustable linear electricity
Source overcurrent protection setting value Iset1 is compared, to judge that adjustable linear power supply 2 whether there is failure.
In above-mentioned technical proposal, it further includes the second current sampling module 6, and second current sampling module 6 is for adopting
Collection flows through the electric current Isam2 of impedance adjustable load 3, and the electric current Isam2 for flowing through impedance adjustable load 3 is transferred to impedance adjustable
The electric current Isam2 for flowing through impedance adjustable load 3 is protected setting value by load 3, impedance adjustable load 3 with impedance adjustable load overcurrent
Iset2 is compared, as the electric current Isam2 ＜ impedance adjustable load overcurrents protection setting value Iset2 for flowing through impedance adjustable load 3
When, impedance adjustable loads the voltage sample that 3 impedance is exported by impedance adjustable load voltage setting value Vset2 and sampling module 4
The comparison result of value Vsam controls, and so that the battery analog system output end voltage is stablized and is set in impedance adjustable load voltage
Value；Tunable load is operated in constant pressure load model, when the electric current Isam2 >=impedance adjustable for flowing through impedance adjustable load 3 loaded
When stream protection setting value Iset2, the impedance of impedance adjustable load 3 protects setting value Iset2 and stream by impedance adjustable load overcurrent
The comparison result of 3 electric current Isam2 is loaded through impedance adjustable to control, to which the current limit of tunable load will be flowed through in impedance
Tunable load overcurrent protection setting value Iset2, has the function that overcurrent protection, tunable load is operated in Constant Current Load mould at this time
Formula.Constant-pressure type load be exactly load impedance adjusting target be to maintain load both ends voltage it is consistent with setting value, i.e., voltage is adopted
Sample value Vsam is consistent with impedance adjustable load voltage setting value Vset2, in the charge balancing test for carrying out active equalization, battery
Management internal system equalizing circuit is equivalent to a constant-current supply, external output current, requires test device can this when
This electric current is absorbed, while also wanting the voltage of holding meanss output port constant, needs adjustable linear power supply 2 and constant-pressure type at this time
Load cooperation is realized, voltage is provided by adjustable linear power supply 2, is supported on by constant-pressure type and is kept absorbing electricity in the case that voltage is constant
Pond manages the charge balancing electric current of system, and (for example present impedance adjustable load voltage setting value Vset2 is 3V, battery management system
The active equalization charging current of system is 1A, in order to keep 3V voltages constant, constant pressure load regulation direct impedance to 3 Ω so that be
Unite output end voltage=1A × 3 Ω=3V, permanent in order to keep 3V voltages constant when BMS active equalization charging currents become 2A
Press load regulation direct impedance to 1.5 Ω so that system output terminal voltage=2A × 1.5 Ω=3V, voltage remain unchanged).
In above-mentioned technical proposal, second current sampling module 6 is additionally operable to that the electric current of impedance adjustable load 3 will be flowed through
Isam2 is transferred to main control module 1, and main control module 1 is by bearing the electric current Isam2 for flowing through impedance adjustable load 3 with impedance adjustable
It carries overcurrent protection setting value Iset2 to be compared, to judge impedance adjustable load 3 with the presence or absence of failure (if inconsistent
Illustrate that there are failures).
In above-mentioned technical proposal, the impedance adjustable load 3 is loaded in normal work for constant-pressure type, is protected overcurrent occurs
Constant-current type load is switched to when shield；Adjustable linear power supply 2 is voltage source in normal work, is switched to when overcurrent protection occurs
Current source.When battery management system internal short-circuit, if adjustable linear power supply 2 does not have overcurrent protection, its electric current that will become
Must be very big, cause to burn out circuit.
A kind of battery simulation method of above system, it includes the following steps：
Step 1：The main control module 1 conveys adjustable linear electric power output voltage setting value Vset1 to adjustable linear power supply 2
With adjustable linear power supply overcurrent protection setting value Iset1, and to impedance adjustable load 3 conveying impedance adjustable load voltage setting values
Vset2 and impedance adjustable load overcurrent protection setting value Iset2；
Step 2：Voltage sample module 4 acquires the battery analog system output end voltage, and by voltage sample value Vsam
It is conveyed to adjustable linear power supply 2 and impedance adjustable load 3 respectively；
Step 3：The adjustable linear power supply 2 is according to adjustable linear electric power output voltage setting value Vset1 and voltage sample
The comparison result for the voltage sample value Vsam that module 4 exports exports corresponding voltage, control voltage sample value and adjustable linear electricity
Source output voltage setting value is equal, and sets corresponding overcurrent protection thresholding according to adjustable linear power supply overcurrent protection setting value；
Step 4：Impedance adjustable load 3 receives impedance adjustable load voltage setting value Vset2 and electricity that main control module 1 exports
The system output voltage sample value Vsam for pressing sampling module 4 to export, according to the comparison result dynamic regulation direct impedance of the two,
Battery analog system output end voltage is set to stablize in impedance adjustable load voltage setting value Vset2；Impedance adjustable load 3 also according to
Impedance adjustable load overcurrent protects setting value Iset2 to set corresponding overcurrent protection thresholding, and (overcurrent protection thresholding can equal to impedance
Load overcurrent is adjusted to protect setting value Iset2), under normal circumstances, the electric current ＜ impedance adjustables for flowing through impedance adjustable load 3 loaded
Stream protection setting value Iset2, impedance adjustable load 3 are operated in constant pressure load model；When flow through impedance adjustable load 3 electric current >=
When impedance adjustable load overcurrent protects setting value Iset2, impedance adjustable load 3 is operated in Constant Current Load pattern, reaches overcurrent guarantor
The purpose of shield；
Step 5：First current sampling module 5 acquires 2 output end current Isam1 of adjustable linear power supply, and will be adjustable linear
2 output end current Isam1 of power supply is transferred to adjustable linear power supply 2, and the adjustable linear power supply 2 exports adjustable linear power supply 2
End electric current Isam1 is compared with adjustable linear power supply overcurrent protection setting value Iset1, when adjustable linear power supply 2 output end electricity
When flowing the adjustable linear power supply overcurrent protection setting value Iset1 of Isam1 ＜, adjustable linear power supply 2 is by adjustable linear power supply output electricity
The comparison result of setting value Vset1 and voltage sample value Vsam is pressed to control output, control voltage sample value and adjustable linear electricity
Source output voltage setting value is equal, and adjustable linear power supply 2 is operated in voltage source mode；When 2 output end current of adjustable linear power supply
When Isam1 >=adjustable linear power supply overcurrent protection setting value Iset1, the output of adjustable linear power supply 2 is by adjustable linear power supply mistake
The comparison result control of stream protection setting value Iset1 and 2 output end current Isam1 of adjustable linear power supply, makes adjustable linear power supply 2
Output current be equal to adjustable linear power supply overcurrent protection setting value Iset1, have the function that overcurrent protection, it is adjustable at this time linear
Power supply 2 is operated in current source mode；
Second current sampling module 6 acquires the electric current Isam2 for flowing through impedance adjustable load 3, and will flow through impedance can
The electric current Isam2 of load 3 is adjusted to be transferred to impedance adjustable load 3, impedance adjustable load 3 will flow through the electric current of impedance adjustable load 3
Isam2 is compared with impedance adjustable load overcurrent protection setting value Iset2, as the electric current Isam2 for flowing through impedance adjustable load 3
When ＜ impedance adjustable load overcurrents protect setting value Iset2, the impedance of impedance adjustable load 3 is set by impedance adjustable load voltage
The comparison result of value Vset2 and system output terminal voltage Vsam controls, and the battery analog system output end voltage is made to stablize
In impedance adjustable load voltage setting value；When the electric current Isam2 >=impedance adjustable load overcurrent protection for flowing through impedance adjustable load 3
When setting value Iset2, the impedance of impedance adjustable load 3 by impedance adjustable load overcurrent protection setting value Iset2 and flows through impedance
The fiducial value of the electric current Isam2 of tunable load 3 controls, and the current limit to flow through tunable load is loaded in impedance adjustable
Overcurrent protection setting value Iset2, has the function that overcurrent protection, and tunable load is operated in Constant Current Load pattern at this time；
Step 6：Voltage sample module 4 is additionally operable to voltage sample value Vsam being transferred to main control module 1, and main control module 1 is logical
It crosses and sets voltage sample value Vsam with adjustable linear electric power output voltage setting value Vset1 and impedance adjustable load voltage respectively
Value Vset2 is compared, to judge that adjustable linear power supply 2 and impedance adjustable load 3 whether there is failure；
2 output end current Isam1 of adjustable linear power supply is transferred to main control module 1 by first current sampling module 5, main
Control module 1 by by 2 output end current Isam1 of adjustable linear power supply and adjustable linear power supply overcurrent protection setting value Iset1 into
Row compares, to judge that adjustable linear power supply 2 whether there is failure；
The electric current Isam2 for flowing through impedance adjustable load 3 is transferred to main control module 1 by second current sampling module 6, main
Control module 1 by will flow through electric current Isam2 and the impedance adjustable load overcurrent of impedance adjustable load 3 protect setting value Iset2 into
Row compares, to judge that impedance adjustable load 3 whether there is failure.
When the present invention is operated under mesuring battary management system discharge equilibrium state, as shown in Fig. 2, R1 is represented on circuit
Equiva lent impedance, A points represent the position of voltage sample in Fig. 1.When mesuring battary management system is in charge balancing state, cell tube
Reason internal system equalizing circuit is equivalent to a Constant Current Load, needs to absorb electric current, therefore have from adjustable linear power supply 2 and flow to
The electric current of mesuring battary management system causes A point voltages to have the tendency that reduction, linear electricity adjustable at this time due to the presence of electric current
Source 2 output voltage is improved according to feedback so that A point voltages keep consistent with setting value；Impedance adjustable load 3 simultaneously is according to feedback
Direct impedance is adjusted, so that direct impedance is adjusted to maximum, hardly picks up electric current.Final A point voltages keep consistent with setting value,
The absorption euqalizing current of mesuring battary management system is provided by adjustable linear power supply 2.
When the present invention is operated under mesuring battary management system charge balancing state, as shown in figure 3, R1 represents circuit in figure
On equiva lent impedance, A points represent the position of voltage sample in Fig. 1.It is to be measured when battery management system is in charge balancing state
Battery management system internal balance circuit is equivalent to constant-current source, therefore current direction is flowed out from mesuring battary management system, when
When electric current flows through impedance adjustable load 3, A point voltages have raised trend, adjustable linear power supply 2 to reduce output electricity according to feedback
Pressure makes its output voltage keep suitable with A point voltages；Impedance adjustable load simultaneously 3 is adjusted direct impedance to one according to feedback
A suitable value so that battery management system euqalizing current flows through the A point voltages generated after impedance adjustable load 3 and setting value one
It causes.Final A point voltages keep consistent with setting value, and the euqalizing current of mesuring battary management system output is absorbed by tunable load.
When battery management system is operated in sample states, the electricity of very little is only absorbed relative to its port of equalization discharge state
Stream, entire adjustment process and above-mentioned equalization discharge state consistency.
The present invention is in such a way that adjustable linear power supply and tunable load are combined, in active equalization functional test, i.e.,
The requirement of simulated battery voltage is realized, and realizes the requirement of euqalizing current two-way flow.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of battery analog system for supporting BMS active equalization functional tests, it is characterised in that：It include main control module (1),
Adjustable linear power supply (2), impedance adjustable load (3) and voltage sample module (4), main control module (1) are used for adjustable linear electricity
Source (2) conveys adjustable linear electric power output voltage setting value and adjustable linear power supply overcurrent protection setting value, and can to impedance
Load (3) conveying impedance adjustable load voltage setting value and impedance adjustable load overcurrent is adjusted to protect setting value；
Voltage sample module (4) conveys voltage sample value for acquiring the battery analog system output end voltage respectively
(3) are loaded to adjustable linear power supply (2) and impedance adjustable；
The voltage that adjustable linear power supply (2) is used to be exported according to adjustable linear electric power output voltage setting value and sampling module (4)
The comparison result of sampled value exports corresponding voltage, controls voltage sample value and adjustable linear electric power output voltage setting value phase
Deng, and corresponding overcurrent protection thresholding is set according to adjustable linear power supply overcurrent protection setting value；
Impedance adjustable loads the voltage that (3) are used to export according to impedance adjustable load voltage setting value and voltage sample module (4)
The comparison result of sampled value adjusts direct impedance, and battery analog system output end voltage stabilization is made to be set in impedance adjustable load voltage
Definite value, and protect setting value to set corresponding overcurrent protection thresholding according to impedance adjustable load overcurrent.
2. the battery analog system according to claim 1 for supporting BMS active equalization functional tests, it is characterised in that：Electricity
Pressure sampling module (4) is additionally operable to voltage sample value being transferred to main control module (1), and main control module (1) is by by voltage sample value
It is compared respectively with adjustable linear electric power output voltage setting value and impedance adjustable load voltage setting value, it is adjustable to judge
Linear power supply (2) and impedance adjustable load (3) whether there is failure.
3. the battery analog system according to claim 1 for supporting BMS active equalization functional tests, it is characterised in that：It
Further include the first current sampling module (5), first current sampling module (5) is for acquiring adjustable linear power supply (2) output
Electric current is held, and adjustable linear power supply (2) output end current is transferred to adjustable linear power supply (2), the adjustable linear power supply (2)
Adjustable linear power supply (2) output end current is compared with adjustable linear power supply overcurrent protection setting value, when adjustable linear electricity
When linear power supply overcurrent protection setting value that source (2) output end current ＜ is adjustable, adjustable linear power supply (2) is defeated by adjustable linear power supply
The comparison result for going out the voltage sample value of voltage setting value and sampling module (4) output exports corresponding voltage, and control voltage is adopted
Sample value is equal with adjustable linear electric power output voltage setting value；When adjustable linear power supply (2) output end current >=adjustable linear electricity
When the overcurrent protection setting value of source, the output of adjustable linear power supply (2) is by adjustable linear power supply overcurrent protection setting value and adjustable line
Property power supply (2) output end current comparison result control, make adjustable linear power supply (2) output current be equal to adjustable linear power supply
Overcurrent protection setting value.
4. the battery analog system according to claim 3 for supporting BMS active equalization functional tests, it is characterised in that：Institute
The first current sampling module (5) is stated to be additionally operable to adjustable linear power supply (2) output end current being transferred to main control module (1), master control
Module (1) by the way that adjustable linear power supply (2) output end current is compared with adjustable linear power supply overcurrent protection setting value, from
And judges adjustable linear power supply (2) and whether there is failure.
5. the battery analog system according to claim 1 for supporting BMS active equalization functional tests, it is characterised in that：It
Further include the second current sampling module (6), second current sampling module (6) flows through impedance adjustable load (3) for acquiring
Electric current, and by flow through impedance adjustable load (3) electric current be transferred to impedance adjustable load (3), impedance adjustable load (3) will flow
The electric current that (3) are loaded through impedance adjustable is compared with impedance adjustable load overcurrent protection setting value, negative when flowing through impedance adjustable
When carrying the electric current ＜ impedance adjustable load overcurrents protection setting value of (3), the impedance of impedance adjustable load (3) is loaded by impedance adjustable
Voltage setting value and the comparison result of the voltage sample value of sampling module (4) output are adjusted, and make battery analog system output end
Voltage stabilization is in impedance adjustable load voltage setting value；When the electric current >=impedance adjustable for flowing through impedance adjustable load (3) loaded
Stream protection setting value when, impedance adjustable load (3) impedance by impedance adjustable load overcurrent protection setting value and flow through impedance can
The comparison result of the electric current of load (3) is adjusted to control, to load the current limit for flowing through tunable load in impedance adjustable
Stream protection setting value.
6. the battery analog system according to claim 5 for supporting BMS active equalization functional tests, it is characterised in that：Institute
The second current sampling module (6) is stated to be additionally operable to the electric current for flowing through impedance adjustable load (3) being transferred to main control module (1), master control
Module (1) by the way that electric current and impedance adjustable load overcurrent the protection setting value for flowing through impedance adjustable and loading (3) are compared, from
And judges impedance adjustable load (3) and whether there is failure.
7. the battery analog system according to claim 1 for supporting BMS active equalization functional tests, it is characterised in that：Institute
It states impedance adjustable load (3) to load for constant-pressure type in normal work, be loaded for constant-current type when overcurrent protection occurs；
Adjustable linear power supply (2) is voltage source in normal work, is current source when overcurrent protection occurs.
8. the battery simulation method of system described in a kind of claim 1, which is characterized in that it includes the following steps：
Step 1：Main control module (1) conveys adjustable linear electric power output voltage setting value and adjustable line to adjustable linear power supply (2)
Property power supply overcurrent protection setting value, and to impedance adjustable load (3) conveying impedance adjustable load voltage setting value and impedance adjustable
Load overcurrent protects setting value；
Step 2：Voltage sample module (4) acquires battery analog system output end voltage, and voltage sample value is conveyed to respectively
Adjustable linear power supply (2) and impedance adjustable load (3)；
Step 3：Adjustable linear power supply (2) exports according to adjustable linear electric power output voltage setting value and voltage sample module (4)
The comparison result of voltage sample value export corresponding voltage, control voltage sample value is set with adjustable linear electric power output voltage
It is worth equal, and corresponding overcurrent protection thresholding is set according to adjustable linear power supply overcurrent protection setting value；
Step 4：Impedance adjustable loads the electricity that (3) are exported according to impedance adjustable load voltage setting value and voltage sample module (4)
It presses the comparison result of sampled value to adjust direct impedance, battery analog system output end voltage is made to stablize in impedance adjustable load voltage
Setting value, and protect setting value to set corresponding overcurrent protection thresholding according to impedance adjustable load overcurrent.
9. battery simulation method according to claim 8, it is characterised in that：Further include step 5 after the step 4：First
Current sampling module (5) acquires adjustable linear power supply (2) output end current, and adjustable linear power supply (2) output end current is passed
It is defeated by adjustable linear power supply (2), adjustable linear power supply (2) is by adjustable linear power supply (2) output end current and adjustable linear power supply
Overcurrent protection setting value is compared, when the adjustable linear power supply overcurrent protection settings of adjustable linear power supply (2) output end current ＜
When value, adjustable linear power supply (2) presses the voltage sample value of adjustable linear electric power output voltage setting value and sampling module (4) output
Comparison result export corresponding voltage, control voltage sample value is equal with adjustable linear electric power output voltage setting value；When can
When adjusting linear power supply (2) output end current >=adjustable linear power supply overcurrent protection setting value, the output of adjustable linear power supply (2) by
The comparison result of adjustable linear power supply overcurrent protection setting value and adjustable linear power supply (2) output end current controls, and makes adjustable line
Property power supply (2) output current be equal to adjustable linear power supply overcurrent protection setting value；
Second current sampling module (6) acquisition flows through the electric current of impedance adjustable load (3), and will be loaded (3) through impedance adjustable
Electric current is transferred to impedance adjustable load (3), and impedance adjustable load (3) will flow through the electric current of impedance adjustable load (3) and impedance can
Load overcurrent protection setting value is adjusted to be compared, when the electric current ＜ impedance adjustable load overcurrents for flowing through impedance adjustable load (3) are protected
When protecting setting value, impedance adjustable loads the electricity that the impedance of (3) is exported by impedance adjustable load voltage setting value and sampling module (4)
It presses the comparison result of sampled value to adjust, so that battery analog system output end voltage is stablized and set in impedance adjustable load voltage
Value, when the electric current >=impedance adjustable load overcurrent for flowing through impedance adjustable load (3) protects setting value, impedance adjustable loads (3)
Impedance by impedance adjustable load overcurrent protection setting value and flow through the comparison result of the electric current that impedance adjustable loads (3) and control
System, the current limit to flow through tunable load protect setting value in impedance adjustable load overcurrent.
10. battery simulation method according to claim 9, it is characterised in that：Further include step 6 after the step 5：Voltage
Sampling module (4) is additionally operable to voltage sample value being transferred to main control module (1), and main control module (1) is by dividing voltage sample value
It is not compared with adjustable linear electric power output voltage setting value and impedance adjustable load voltage setting value, to judge adjustable line
Property power supply (2) and impedance adjustable load (3) whether there is failure；
Adjustable linear power supply (2) output end current is transferred to main control module (1), master control by first current sampling module (5)
Module (1) by the way that adjustable linear power supply (2) output end current is compared with adjustable linear power supply overcurrent protection setting value, from
And judges adjustable linear power supply (2) and whether there is failure；
The electric current for flowing through impedance adjustable load (3) is transferred to main control module (1), master control by second current sampling module (6)
Module (1) by the way that electric current and impedance adjustable load overcurrent the protection setting value for flowing through impedance adjustable and loading (3) are compared, from
And judges impedance adjustable load (3) and whether there is failure.
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