CN106569135A - Battery detection circuit and detection method - Google Patents
Battery detection circuit and detection method Download PDFInfo
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- CN106569135A CN106569135A CN201610895806.0A CN201610895806A CN106569135A CN 106569135 A CN106569135 A CN 106569135A CN 201610895806 A CN201610895806 A CN 201610895806A CN 106569135 A CN106569135 A CN 106569135A
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- 238000001514 detection method Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 17
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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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
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Abstract
The present invention discloses a battery detection circuit and a detection method. The detection method comprises the following steps of controlling the first control end of a selector switch and the second control end of the selector switch to be switched on, maintaining the switched-on state for a first predetermined period of time to allow a first constant-voltage source to be connected with the battery detection circuit, and obtaining a first voltage and a first current; controlling the first control end of the selector switch and the third control end of the selector switch to be switched on, maintaining the switched-on state for a third predetermined period of time to allow a second constant-voltage source to be connected with the battery detection circuit, and obtaining a second voltage and a second current; and obtaining the resistance value of the equivalent internal resistance of a battery according to the first voltage, the first current, the second voltage and the second current. Based on the above manner, the internal resistance of the battery can be obtained in the relatively simple manner. Therefore, the practical application of the circuit and the method is facilitated.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of battery detection circuit and detection method.
Background technology
With the continuous development of contemporary electronic technology, mobile device progresses into the life of consuming public, therefore, pair set
The concern of standby power management is also strengthened day by day, and lithium ion battery is also stepped into therewith on a large scale as a kind of new powering device
Commercial stage.
With the increase of battery charging and discharging cycle-index, lithium battery produces " aging " phenomenon, is mainly manifested in two aspects：
Battery chemistries capacity is reduced and internal battery impedance increase.Wherein internal battery impedance increases particularly evident, the increase meeting of internal resistance
Accelerate cell output voltage to reach battery cutoff voltage, therefore cause the reduction of the actual available power of battery.Therefore, in battery
The research of resistance, is the emphasis of current electric quantity algorithm concern.
At present different vendor generally adopt in electricity algorithm for impedance track algorithm (Impedance Track), its
Theoretical basiss be coulometer in combination with voltage method, while add the factors such as temperature in electricity algorithm, so as to calculate compared with
For accurate internal resistance data, and the change of the internal resistance of cell is fed back in the middle of battery power amount calculation.But using the algorithm, due to
More influence factor's (such as temperature, load and aging action etc.) is introduced, so that the calculating of internal resistance is very complicated.
Therefore, how to realize that the internal resistance for obtaining battery in a relatively simple manner is a problem demanding prompt solution.
The content of the invention
The invention mainly solves the technical problem of a kind of battery detection circuit and detection method are provided, can be with letter relatively
Single mode obtains the internal resistance of battery.
To solve above-mentioned technical problem, one aspect of the present invention is：A kind of battery detection circuit is provided, should
Circuit includes pond, battery equivalent internal resistance, the first constant pressure source, first resistor, the second constant pressure source, second resistance, switching switch, inspection stream
Resistance, equivalent load resistance；Wherein, the positive pole of battery is connected with the first connection end of battery equivalent internal resistance, battery equivalent internal resistance
The second connection end be connected with the first control end of switching switch and the first inspection stream end of inspection leakage resistance respectively, switch for switching
Two control ends are connected with one end of first resistor, and the other end of first resistor is connected with the positive pole of the first constant pressure source, switching switch
The 3rd control end be connected with one end of second resistance, the other end of second resistance is connected with the positive pole of the second constant pressure source, inspection stream
Second inspection stream end of resistance is connected with one end of equivalent load resistance, the negative pole of battery, the negative pole of the first constant pressure source, the second constant pressure
The negative pole in source and the other end of equivalent load resistance are connected with each other.
To solve above-mentioned technical problem, another technical solution used in the present invention is：A kind of battery detection method is provided,
Based on above-mentioned battery detection circuit, the detection method includes：First control end of control switching switch and the of switching switch
Two control ends are turned on and continued for first scheduled time so that the first constant pressure source accesses battery detection circuit；Obtain first voltage and the
One electric current, wherein, first voltage is the voltage between first control end and the negative pole of the first constant pressure source of switching switch, and first is electric
Flow to flow through the electric current of inspection leakage resistance；First control end of control switching switch and the 3rd control end of switching switch are turned on and held
Continuous 3rd scheduled time is so that the second constant pressure source accesses battery detection circuit；Obtain second voltage and the second electric current, second voltage
For the voltage between first control end and the negative pole of the second constant pressure source of switching switch, the second electric current is the electricity for flowing through inspection leakage resistance
Stream；The resistance of battery equivalent internal resistance is obtained according to first voltage, the first electric current, second voltage, the second electric current.
Wherein, when the first constant pressure source accesses battery detection circuit, battery detection circuit meets equation below：
I′fg=I 's+I1, E=Rs*I′s+V′bat,
Wherein, I 'fgTo flow through the first electric current of inspection leakage resistance, I 'sTo flow through the electric current of battery equivalent internal resistance, I1To flow through
The electric current of first resistor, E for battery equivalent electromotive force, RsFor the resistance of battery equivalent internal resistance, V 'batFor the of switching switch
First voltage between the negative pole of one control end and the first constant pressure source, R1For the resistance of first resistor, E1For the first constant pressure source etc.
Effect electromotive force.
Wherein, when the second constant pressure source accesses battery detection circuit, battery detection circuit meets equation below：
I″fg=I "s+I2, E=Rs*I″s+V″bat,
Wherein, I "fgTo flow through the second electric current of inspection leakage resistance, I "sTo flow through the electric current of battery equivalent internal resistance, I2To flow through
The electric current of second resistance, E for battery equivalent electromotive force, RsFor the resistance of battery equivalent internal resistance, V "batFor the of switching switch
Second voltage between the negative pole of one control end and the second constant pressure source, R2For the resistance of second resistance, E2For the second constant pressure source etc.
Effect electromotive force.
Wherein, according to the first voltage, first electric current, the second voltage, second electric current are obtained
The step of resistance of battery equivalent internal resistance, is specially：
The resistance of battery equivalent internal resistance is calculated according to equation below：
Wherein, RsFor the resistance of battery equivalent internal resistance, first voltage V 'bat, second voltage V "bat, the first electric current I 'fg,
Two electric current I "fg, the first constant pressure source equivalent electromotive force E1, the second constant pressure source equivalent electromotive force E2, first resistor R1, it is second electric
Resistance R2It is known quantity.
Wherein, the second control end of the first control end of control switching switch and switching switch is turned on and continues first and makes a reservation for
Time is so that after the step of the first constant pressure source accesses battery detection circuit, the method is further included：Control switching switch
Second control end of the first control end and switching switch disconnects and switches the 3rd of the first control end of switch and switching switch
Control end disconnects and continued for second scheduled time to disconnect the connection of the first constant pressure source and the second constant pressure source and battery detection circuit
Path.
Wherein, first scheduled time was 10 milliseconds, and second scheduled time was 20 milliseconds, and the 3rd scheduled time was 10 milliseconds.
To solve above-mentioned technical problem, another technical scheme that the present invention is adopted is：A kind of battery detection method is provided,
Based on above-mentioned battery detection circuit, the detection method includes：Obtain the resistance of the battery equivalent internal resistance under multiple specified temp points
The open-circuit voltage of value and battery is forming multiple ZCV forms；Obtain the Current Temperatures of battery and according to Current Temperatures and multiple spies
Determine the ZCV table reconfigurations ZCV forms corresponding with Current Temperatures under temperature spot；According to the ZCV forms after reconstruct and the table of battery
Face temperature obtains the electricity of battery；Wherein, the resistance of battery equivalent internal resistance is obtained according to following manner：The of control switching switch
Second control end of one control end and switching switch is turned on and continued for first scheduled time so that the first constant pressure source accesses battery inspection
Slowdown monitoring circuit；First voltage and the first electric current are obtained, first voltage is to switch the first control end of switch and bearing for the first constant pressure source
Voltage between pole, the first electric current is the electric current for flowing through inspection leakage resistance；First control end and switching switch of control switching switch
The 3rd control end turn on and continued for the 3rd scheduled time so that the second constant pressure source access battery detection circuit；Obtain second voltage
With the second electric current, second voltage is the voltage between first control end and the negative pole of the second constant pressure source of switching switch, and second is electric
Flow to flow through the electric current of inspection leakage resistance；According to first voltage, the first electric current, second voltage, the second electric current obtain battery it is equivalent in
The resistance of resistance.
Wherein, according to the ZCV table reconfigurations ZCV tables corresponding with Current Temperatures under Current Temperatures and multiple specified temps point
The step of lattice, is specially：
The method reconstruct by linear interpolation and current temperature according to the ZCV forms under Current Temperatures and multiple specified temps point
Spend corresponding ZCV forms.
Wherein, multiple specified temp points are respectively -10,0,25 and 50 degrees Celsius.
The invention has the beneficial effects as follows：The battery detection circuit and detection method of the present invention is by the of control switching switch
Second control end of one control end and switching switch is turned on and continued for first scheduled time so that the first constant pressure source accesses battery inspection
Slowdown monitoring circuit, so as to obtain first voltage and the first electric current；First control end of control switching switch and the 3rd control of switching switch
End processed turns on and continued for the 3rd scheduled time so that the second constant pressure source accesses battery detection circuit, so as to obtain second voltage and the
Two electric currents；The resistance of battery equivalent internal resistance is obtained according to first voltage, the first electric current, second voltage, the second electric current.By above-mentioned
Mode, the present invention can in a relatively simple manner obtain the internal resistance of battery, convenient actual application.
Description of the drawings
Fig. 1 is the schematic diagram of the battery detection circuit of the embodiment of the present invention；
Fig. 2 is the flow chart of the battery detection method of first embodiment of the invention；
Fig. 3 is the first equivalent circuit diagram of battery detection circuit shown in Fig. 1；
Fig. 4 is the second equivalent circuit diagram of battery detection circuit shown in Fig. 1
Fig. 5 is the flow chart of the battery detection method of second embodiment of the invention.
Specific embodiment
Specific component is censured in specification and claims some vocabulary used in, skill in art
Art personnel are, it is to be appreciated that manufacturer may call same component with different nouns.This specification and claims book
Not in the way of the difference of title is used as distinguishing component, but the difference with component functionally is used as the base distinguished
It is accurate.With reference to the accompanying drawings and examples the present invention is described in detail.
Fig. 1 is the schematic diagram of the battery detection circuit of the embodiment of the present invention.As shown in figure 1, battery detection circuit includes：Electricity
Pond V, battery equivalent internal resistance RS, the first constant pressure source V1, first resistor R1, the second constant pressure source V2, second resistance R2, switching switch
SW, inspection leakage resistance RfgWith equivalent load resistance RL。
Wherein, the positive pole of battery V and battery equivalent internal resistance RSThe first connection end S1 connection, battery equivalent internal resistance RS
Two connection end S2 switch respectively first control end 1 and inspection leakage resistance R of SW with switchingfgThe first inspection stream end fg1 connections, switching opens
The second control end 2 for closing SW is connected with one end of first resistor R1, and the other end of first resistor R1 and the first constant pressure source V1 are just
Pole connects, and the 3rd control end 3 of switching switch SW is connected with one end of second resistance R2, the other end of second resistance R2 and second
The positive pole connection of constant pressure source V2, examines leakage resistance RfgThe second inspection stream end fg2 and equivalent load resistance RLOne end connection, battery V
Negative pole, the negative pole of the first constant pressure source V1, the negative pole of the second constant pressure source V2 and equivalent load resistance RLThe other end be connected with each other.
Fig. 2 is the flow chart of the battery detection method of first embodiment of the invention, and the method shown in Fig. 2 is based on shown in Fig. 1
Battery detection circuit.If it is noted that there is substantially the same result, the method for the present invention is not with the stream shown in Fig. 2
Cheng Shunxu is limited.As shown in Fig. 2 the method comprising the steps of：
Step S101：First control end of control switching switch and the second control end of switching switch are turned on and continue first
The scheduled time is so that the first constant pressure source accesses battery detection circuit.
Step S102：Obtain first voltage and the first electric current, wherein, first voltage be the first control end of switching switch and
Voltage between the negative pole of the first constant pressure source, the first electric current is the electric current for flowing through inspection leakage resistance.
In step s 102, please also refer to Fig. 3, Fig. 3 is the first equivalent circuit diagram of battery detection circuit shown in Fig. 1.
As shown in figure 3, when the first control end of switching switch and the second control end of switching switch are turned on, the first constant pressure source accesses electricity
Circuit is detected in pond, and now, battery detection circuit meets equation below：
I′fg=I 's+I1, E=Rs*I′s+V′bat,
Wherein, I 'fgTo flow through inspection leakage resistance RfgThe first electric current, I 'sTo flow through battery equivalent internal resistance RSElectric current, I1For
Flow through the electric current of first resistor R1, E for battery V equivalent electromotive force, RsFor battery equivalent internal resistance RSResistance, V 'batFor switching
First voltage, R between first control end and the negative pole of the first constant pressure source V1 of switch SW1For the resistance of first resistor R1, E1For
The equivalent electromotive force of the first constant pressure source V1.
In the present embodiment, the first electric current I 'fgAccording to inspection leakage resistance RfgTest is obtained, first voltage V 'batAccording to voltage
Measure examination to obtain.
Step S103：First control end of control switching switch and the second control end of switching switch disconnect and switching is opened
Close the first control end and switching switch the 3rd control end disconnect and continue second scheduled time with disconnect the first constant pressure source and
The connecting path of the second constant pressure source and battery detection circuit.
In step s 103, the second control end of the first control end of control switching switch and switching switch disconnects and cuts
3rd control end of the first control end and switching switch of changing switch disconnects, so that the first constant pressure source and the second constant pressure source stop
Only export, the impact that battery detection circuit is brought is accessed with the first constant pressure source in removal process S101.
Step S104：First control end of control switching switch and the 3rd control end of switching switch are turned on and continue the 3rd
The scheduled time is so that the second constant pressure source accesses battery detection circuit.
In the present embodiment, first scheduled time was equal to for the 3rd scheduled time and second scheduled time is more than the first pre- timing
Between.Preferably, first scheduled time and the 3rd scheduled time are 10 milliseconds, and second scheduled time was 20 milliseconds.
Wherein, because the first constant pressure source and the second constant pressure source access first scheduled time of battery detection circuit and the 3rd pre-
Fix time shorter, such that it is able to ignore the access procedure in impact of the ambient temperature to battery.
Step S105：Second voltage and the second electric current are obtained, second voltage is first control end and second of switching switch
Voltage between the negative pole of constant pressure source, the second electric current is the electric current for flowing through inspection leakage resistance.
In step S105, please also refer to Fig. 4, Fig. 4 is the second equivalent circuit diagram of battery detection circuit shown in Fig. 1.
As shown in figure 4, when the first control end of switching switch and the 3rd control end of switching switch are turned on, the second constant pressure source accesses electricity
Circuit is detected in pond, and now, battery detection circuit meets equation below：
I″fg=I "s+I2, E=Rs*I″s+V″bat,
Wherein, I "fgTo flow through inspection leakage resistance RfgThe second electric current, I "sTo flow through battery equivalent internal resistance RSElectric current, I2For
Flow through the electric current of second resistance R2, E for battery V equivalent electromotive force, RsFor battery equivalent internal resistance RSResistance, V "batFor switching
Second voltage between first control end and the negative pole of the second constant pressure source V2 of switch SW, R2For the resistance of second resistance R2, E2For
The equivalent electromotive force of the second constant pressure source V2.
In the present embodiment, the second electric current I "fgAccording to inspection leakage resistance RfgTest is obtained, second voltage V "batAccording to voltage
Measure examination to obtain.
Step S106：First control end of control switching switch and the second control end of switching switch disconnect and switching is opened
Close the first control end and switching switch the 3rd control end disconnect and continue second scheduled time with disconnect the first constant pressure source and
The connecting path of the second constant pressure source and battery detection circuit.
Step S107：The resistance of battery equivalent internal resistance is obtained according to first voltage, the first electric current, second voltage, the second electric current
Value.
In step s 107, it is assumed that when the first constant pressure source, the second constant pressure source individually access battery detection circuit, battery
Equivalent electromotive force E and battery equivalent internal resistance resistance RsDo not follow the change of additional constant pressure source and change, then it is folded according to circuit
Plus principle, battery equivalent internal resistance RSResistance meet equation below：
Wherein, RsFor the resistance of battery equivalent internal resistance, first voltage V 'bat, second voltage V "bat, the first electric current I 'fg,
Two electric current I "fg, the first constant pressure source equivalent electromotive force E1, the second constant pressure source equivalent electromotive force E2, first resistor R1, it is second electric
Resistance R2It is known quantity.
Wherein, circuit add-up principle refers to that in linear circuit the voltage and electric current of arbitrary branch road are all each independent sources
Under independent role, the algebraically sum of the voltage of generation and electric current in the branch road.
It will be understood to those skilled in the art that if necessary to obtain battery in the course of the work, not battery in the same time
The resistance of equivalent internal resistance, then need to only circulate execution step S101～step S107.
Fig. 5 is the flow chart of the battery detection method of second embodiment of the invention, and the method shown in Fig. 5 is based on shown in Fig. 1
Battery detection circuit.If it is noted that there is substantially the same result, the method for the present invention is not with the stream shown in Fig. 5
Cheng Shunxu is limited.As shown in figure 5, the method comprising the steps of：
Step S201：The resistance of battery equivalent internal resistance under multiple specified temp points and the open-circuit voltage of battery are obtained with shape
Into multiple ZCV forms.
In step s 201, the resistance of battery equivalent internal resistance is obtained according to following manner：First control of control switching switch
Second control end of end processed and switching switch is turned on and continued for first scheduled time so that the first constant pressure source accesses battery detecting electricity
Road；Obtain first voltage and the first electric current, first voltage be the first control end of switching switch and the first constant pressure source negative pole it
Between voltage, the first electric current be flow through inspection leakage resistance electric current；First control end of control switching switch and three ends turn on and hold
Continuous 3rd scheduled time is so that the second constant pressure source accesses battery detection circuit；Obtain second voltage and the second electric current, second voltage
For the voltage between first control end and the negative pole of the second constant pressure source of switching switch, the second electric current is the electricity for flowing through inspection leakage resistance
Stream；The resistance of battery equivalent internal resistance is obtained according to first voltage, the first electric current, second voltage, the second electric current.Wherein, which
Specific descriptions refer to step S101～step S107 in Fig. 2.
Preferably, multiple specified temp points are respectively -10,0,25 and 50 degrees Celsius.
Wherein, ZCV forms are the curve of the open-circuit voltage of the resistance and battery of battery equivalent internal resistance under specified temp point
Form.
Step S202：Obtain the Current Temperatures of battery and according to the ZCV forms under Current Temperatures and multiple specified temps point
Reconstruct ZCV forms corresponding with Current Temperatures.
In step S202, it is preferable that inserted by linear according to the ZCV forms under Current Temperatures and multiple specified temps point
The method of value reconstructs ZCV forms corresponding with Current Temperatures.
Step S203：The electricity of battery is obtained according to the Current Temperatures of the ZCV forms after reconstruct and battery.
In step S203, electricity is obtained using the method for integration according to the Current Temperatures of the ZCV forms after reconstruct and battery
The electricity in pond.Wherein, due in the acquisition process of the electricity of battery, periodically accessing the first constant pressure source, the second constant pressure source
Battery detection circuit in combination with the corresponding ZCV forms of Current Temperatures and battery temperature, internal resistance is changed detecting the internal resistance of cell
In feeding back to electricity algorithm, so that the electricity for obtaining is more nearly truly.
The invention has the beneficial effects as follows：The battery detection circuit and detection method of the present invention is by the of control switching switch
Second control end of one control end and switching switch is turned on and continued for first scheduled time so that the first constant pressure source accesses battery inspection
Slowdown monitoring circuit, so as to obtain first voltage and the first electric current；First control end of control switching switch and the 3rd control of switching switch
End processed turns on and continued for the 3rd scheduled time so that the second constant pressure source accesses battery detection circuit, so as to obtain second voltage and the
Two electric currents；The resistance of battery equivalent internal resistance is obtained according to first voltage, the first electric current, second voltage, the second electric current.By above-mentioned
Mode, the present invention can in a relatively simple manner obtain the internal resistance of battery, convenient actual application.
Embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (10)
1. a kind of battery detection circuit, it is characterised in that the circuit includes：Battery, battery equivalent internal resistance, the first constant pressure source,
First resistor, the second constant pressure source, second resistance, switching switch, inspection leakage resistance, equivalent load resistance；
Wherein, the positive pole of the battery is connected with the first connection end of the battery equivalent internal resistance, the battery equivalent internal resistance
Second connection end is connected respectively with the first control end of the switching switch and the first inspection stream end of the inspection leakage resistance, described to cut
The second control end for changing switch is connected with one end of the first resistor, the other end of the first resistor and first constant pressure
The positive pole connection in source, the 3rd control end of the switching switch is connected with one end of the second resistance, the second resistance
The other end is connected with the positive pole of second constant pressure source, and end and the equivalent load resistance are flowed in the second inspection of the inspection leakage resistance
One end connects, the negative pole of the battery, the negative pole of first constant pressure source, the negative pole of second constant pressure source and the equivalent negative
The other end for carrying resistance is connected with each other.
2. a kind of detection method of battery detection circuit according to claim 1, it is characterised in that the detection method bag
Include：
First control end of the control switching switch and second control end of switching switch are turned on and continued
First scheduled time is so that first constant pressure source accesses the battery detection circuit；First voltage and the first electric current are obtained, its
In, the first voltage is the electricity between first control end and the negative pole of first constant pressure source of the switching switch
Pressure, first electric current is the electric current for flowing through the inspection leakage resistance；
First control end of the control switching switch and the 3rd control end of switching switch are turned on and continued
3rd scheduled time is so that second constant pressure source accesses the battery detection circuit；
Obtain second voltage and the second electric current, the second voltage is first control end of the switching switch and described the
Voltage between the negative pole of two constant pressure sources, second electric current is the electric current for flowing through the inspection leakage resistance；
According to the first voltage, first electric current, the second voltage, second electric current obtain the battery it is equivalent in
The resistance of resistance.
3. detection method according to claim 2, it is characterised in that when first constant pressure source accesses the battery detecting
During circuit, the detection circuit meets equation below：
I′fg=I 's+I1, E=Rs*I′s+V′bat,
Wherein, I 'fgTo flow through the first electric current of inspection leakage resistance, I 'sTo flow through the electric current of battery equivalent internal resistance, I1To flow through first
The electric current of resistance, E for battery equivalent electromotive force, RsFor the resistance of battery equivalent internal resistance, V 'batFor the first control of switching switch
First voltage between the negative pole of end processed and the first constant pressure source, R1For the resistance of first resistor, E1For the equivalent electric of the first constant pressure source
Kinetic potential.
4. detection method according to claim 3, it is characterised in that when second constant pressure source accesses the battery detecting
During circuit, the detection circuit meets equation below：
I″fg=I "s+I2, E=Rs*I″s+V″bat,
Wherein, I "fgTo flow through the second electric current of inspection leakage resistance, I "sTo flow through the electric current of battery equivalent internal resistance, I2To flow through second
The electric current of resistance, E for battery equivalent electromotive force, RsFor the resistance of battery equivalent internal resistance, V "batFor the first control of switching switch
Second voltage between the negative pole of end processed and the second constant pressure source, R2For the resistance of second resistance, E2For the equivalent electric of the second constant pressure source
Kinetic potential.
5. detection method according to claim 4, it is characterised in that it is described according to the first voltage, it is described first electric
The step of stream, the second voltage, second electric current obtain the resistance of the battery equivalent internal resistance is specially：
The resistance of the battery equivalent internal resistance is calculated according to equation below：
Wherein, RsFor the resistance of battery equivalent internal resistance, first voltage V 'bat, second voltage V "bat, the first electric current I 'fg, it is second electric
Stream I "fg, the first constant pressure source equivalent electromotive force E1, the second constant pressure source equivalent electromotive force E2, first resistor R1, second resistance R2
It is known quantity.
6. detection method according to claim 2, it is characterised in that first control of the control switching switch
Second control end of end processed and switching switch is turned on and continued for first scheduled time so that first constant pressure source connects
After the step of entering the battery detection circuit, methods described is further included：
First control end of the control switching switch and second control end of switching switch disconnect and institute
3rd control end of first control end and switching switch of stating switching switch disconnects and continues the second pre- timing
Between disconnecting the connecting path of first constant pressure source and second constant pressure source and the battery detection circuit.
7. detection method according to claim 6, it is characterised in that first scheduled time is 10 milliseconds, described the
Two scheduled times were 20 milliseconds, and the 3rd scheduled time is 10 milliseconds.
8. a kind of detection method of battery detection circuit according to claim 1, it is characterised in that the detection method bag
Include：
Obtain the battery equivalent internal resistance under multiple specified temp points resistance and the battery open-circuit voltage it is many to be formed
Individual ZCV forms；
Obtain the Current Temperatures of the battery and according to the ZCV tables under the Current Temperatures and the plurality of specified temp point
Lattice reconstruct the ZCV forms corresponding with the Current Temperatures；
The surface temperature of the ZCV forms and the battery after according to reconstruct obtains the electricity of the battery；
Wherein, the resistance of the battery equivalent internal resistance is obtained according to following manner：
First control end of the control switching switch and second control end of switching switch are turned on and continued
First scheduled time is so that first constant pressure source accesses the battery detection circuit；
Obtain first voltage and the first electric current, the first voltage is first control end of the switching switch and described the
Voltage between the negative pole of one constant pressure source, first electric current is the electric current for flowing through the inspection leakage resistance；
First control end of the control switching switch and the 3rd control end of switching switch are turned on and continued
3rd scheduled time is so that second constant pressure source accesses the battery detection circuit；
Obtain second voltage and the second electric current, the second voltage is first control end of the switching switch and described the
Voltage between the negative pole of two constant pressure sources, second electric current is the electric current for flowing through the inspection leakage resistance；
According to the first voltage, first electric current, the second voltage, second electric current obtain the battery it is equivalent in
The resistance of resistance.
9. detection method according to claim 8, it is characterised in that described according to the Current Temperatures and the plurality of spy
The step of determining corresponding with the Current Temperatures ZCV forms of the ZCV table reconfigurations under temperature spot is specially：
Reconstructed by the method for linear interpolation according to the ZCV forms under the Current Temperatures and the plurality of specified temp point
The ZCV forms corresponding with the Current Temperatures.
10. detection method according to claim 8, it is characterised in that the plurality of specified temp point is respectively -10,0,
25 and 50 degrees Celsius.
Priority Applications (1)
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| CN107991626A (en) * | 2017-11-30 | 2018-05-04 | 成都市易冲无线科技有限公司 | A kind of internal resistance of cell detection method and detection circuit |
| CN111707949A (en) * | 2020-05-26 | 2020-09-25 | 联创汽车电子有限公司 | Voltage detection device and voltage detection method |
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| CN106569135B (en) | 2019-07-02 |
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