CN108075527A - A kind of battery pack charging, electric discharge and supplying power for outside control method - Google Patents
A kind of battery pack charging, electric discharge and supplying power for outside control method Download PDFInfo
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- CN108075527A CN108075527A CN201611021002.4A CN201611021002A CN108075527A CN 108075527 A CN108075527 A CN 108075527A CN 201611021002 A CN201611021002 A CN 201611021002A CN 108075527 A CN108075527 A CN 108075527A
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- state relay
- interface
- point
- solid
- charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of battery pack disclosed by the embodiments of the present invention charges, electric discharge and supplying power for outside control method, is related to the control technology of battery pack, can have voltage by charging interface when solution never charges simultaneously；The interface that discharges when not discharging has voltage；When not charging, not discharging, battery pack control circuit consumption battery electricity itself the problem of.When not charging, it is obstructed between the main track and positive bus-bar of charging interface by a two-way solid-state relay, when not discharging, it discharges and is obstructed between interface and positive bus-bar by a unidirectional solid-state relay, charging interface does not have voltage, there is no short circuit between 1,2 two point in control of discharge interface simultaneously, which charges for battery pack, electric discharge and supplying power for outside control.
Description
Technical field
It charges the present invention relates to the control technology field of battery pack more particularly to a kind of battery pack, discharge and externally supplies
Electric control method.
Background technology
With the development of new energy technology in recent decades, reusable accumulator group has been widely applied to electricity
In electrical automobile, electric locomotive and spacecraft.But previous research is often more concerned with battery cell during solution charge and discharge
Balance route, battery charge state (SOC) prediction and cell health state (SOH) prediction etc..But for a safety
Property and the secure battery pack of service life, it should solve the problems, such as three following：
(1) when not charging, charging interface cannot have voltage；
(2) when not discharging, electric discharge interface cannot have voltage；
(3) when not charging, not discharging, battery pack control circuit cannot consume battery electricity itself.
In order to solve the problems, such as above-mentioned 3, it is necessary to design a rational battery pack charging, electric discharge and supplying power for outside control
Method.On the other hand, due to battery pack energy density limitation, realize the control method circuit must it is succinct enough, have
Effect.And there is no a kind of control circuit to can be good at solving the problems, such as above three in presently disclosed technology.
The content of the invention
It is an object of the invention to overcome the shortage of prior art, provide a kind of battery pack and charge, discharge and externally supply
Electric control method, when can solve (1) simultaneously and not charging, charging interface has voltage；(2) when not discharging, electric discharge interface has voltage；
(3) when not charging, not discharging, battery pack control circuit consumption battery electricity itself the problem of.
The technical solution of the present invention：
On the one hand, a kind of battery pack charges, electric discharge and supplying power for outside control circuit, the circuit are used to control battery pack
Power supply, the circuit include 1 two-way solid-state relay, 2 unidirectional solid-state relays, 1 DC/DC without Enable Pin and convert
Device, 1 DC/DC converter with Enable Pin, 2 diodes, 2 discharge resistances, 2 sampling resistors, 2 sampling potentiometers, 1
A positive bus-bar and 1 negative busbar；
The positive and negative electrode of battery pack is respectively connected to positive bus-bar and negative busbar；Negative busbar is also respectively connected with the negative of charging interface
End, the electric discharge negative terminal of interface, the 2nd point of control of discharge interface, make without the input negative terminal of DC/DC converters of Enable Pin, band
Can end DC/DC converters input negative terminal and the 2nd point of 2 discharge resistances；The anode of charging interface is connected to two-way solid
The OUT_A ends of state relay, first discharge resistance the 1st point, first diode anode and first sampling current potential
The the 1st, 2 point of device；The OUT_B ends of two-way solid-state relay are connected to positive bus-bar；The anode of electric discharge interface is connected to unidirectional solid-state
The OUT- ends of relay and the 1st point of second discharge resistance；The OUT+ ends of two unidirectional solid-state relays are connected to positive bus-bar；
The OUT- ends of first unidirectional solid-state relay be connected to electric discharge interface anode and the 1st point of second discharge resistance；Without
Enabled be connected to control of discharge interface the 1st point of the DC/DC converters of Enable Pin；The OUT- of second unidirectional solid-state relay
End be connected to the 2nd diode anode and the 1st, 2 point of second sampling potentiometer；The negative terminal of two diodes connects jointly
To the IN+ ends of " without the DC/DC converters of Enable Pin "；It is connected to without the output OUT+ ends of the DC/DC converters of Enable Pin
The VCC ends of BMS controllers；The GND ends of BMS controllers, two are connected to without the output OUT- ends of the DC/DC converters of Enable Pin
The 2nd point of a sampling resistor, the input of the input of two-way solid-state relay negative IN- points and first unidirectional solid-state relay bears
IN- points；The sampling end AD1 of BMS controllers is connected to the 1st point of the 3rd point of first sampling potentiometer and sampling resistor；BMS
The sampling end AD2 of controller is connected to the 1st point of the 3rd point of second sampling potentiometer and sampling resistor；The IO of BMS controllers
Control signal IO1 is connected to the positive IN+ points of input of the 1st unidirectional solid-state relay；The IO control signals IO2 of BMS controllers connects
It is connected to the positive IN+ points of input of two-way solid-state relay.
On the other hand, a kind of charging, electric discharge and supplying power for outside control method realized based on foregoing circuit, this method bag
Include procedure below：
When needing to charge to battery, directly charging interface it is positive and negative between plus DC charging voltage, BMS controls
After device samples the signal by AD1 sampling ends, BMS controllers control the output port of two-way solid-state relay by I/O signal
It is turned between OUT_A and OUT_B, charging voltage charges to battery pack by the bidirectional relay；
When battery needs electric discharge, by the 1 of control of discharge interface, 2 liang of core short circuit, the DC/DC converters with Enable Pin connect
Low level enable signal is received, the DC/DC converters with Enable Pin start, the output terminal OUT of the DC/DC converters with Enable Pin
+ DC voltage is generated between OUT-, make to turn between the output OUT+ and OUT- of second unidirectional solid-state relay,
After BMS controllers sample the signal by AD2 sampling ends, BMS controllers control the 1st unidirectional solid-state relay by I/O signal
It is turned between the output port OUT+ and OUT- of device, battery pack is externally discharged by the unidirectional solid-state relay；
When not charging, obstructed between the main track and positive bus-bar of charging interface by a two-way solid-state relay, make charging
Interface does not have voltage.
When not discharging, discharge and obstructed between interface and positive bus-bar by a unidirectional solid-state relay, do not have electric discharge interface
There is voltage.
Charging interface does not have voltage, while does not have short circuit between 1,2 two point in control of discharge interface.
A kind of battery pack provided in an embodiment of the present invention charges, electric discharge and supplying power for outside control method, in " battery pack "
" BMS controllers ", using a kind of charging, electric discharge and supplying power for outside control method, solves battery pack between external interface
" when not charging, charging interface cannot have voltage；When not discharging, electric discharge interface cannot have voltage；When not charging, not discharging, battery
Group control circuit cannot consume battery electricity itself " 3 problems.
Description of the drawings
Included attached drawing is used for providing being further understood from the embodiment of the present invention, which constitutes one of specification
Point, for illustrating the embodiment of the present invention, and come together with word description to illustrate the principle of the present invention.It should be evident that below
Attached drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property work on the premise of, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 charges for a kind of battery pack provided in an embodiment of the present invention, electric discharge and supplying power for outside controling circuit structure are shown
It is intended to；
Fig. 2 is BMS controller workflow schematic diagrams in the embodiment of the present invention.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with attached drawing.In the following description, for solution
Purpose and not restrictive is released, elaborates detail, to help to be apparent from the present invention.However, to people in the art
It is readily apparent that the present invention can also be put into practice in the other embodiments departing from these details for member.
It should be noted that in order to avoid because having obscured the present invention during unnecessary details, only showing in the accompanying drawings
The device structure closely related with scheme according to the present invention and/or processing step are gone out, and have been omitted with relation of the present invention not
Big other details.
The embodiment of the present invention provide a kind of battery pack charge, electric discharge and supplying power for outside control circuit, referring to Fig. 1,
In figure：K1, two-way solid-state relay；K2, unidirectional solid-state relay；K3, unidirectional solid-state relay；DC/DC1, no
DC/DC converters with Enable Pin；DC/DC2, the DC/DC converters with Enable Pin；V1, diode；V2, diode；R1, put
Resistance；R2, discharge resistance；W1, sampling potentiometer；W2, sampling potentiometer；R3, sampling resistor；R4, sampling resistor；U1, just
Busbar；U2, negative busbar；U3, battery pack；U4, BMS controller；X1, charging interface；X2, electric discharge interface；X3, control of discharge connect
Mouthful.
The circuit for battery pack to be controlled to power, the circuit include 1 two-way solid-state relay, 2 unidirectional solid-states after
Electric appliance, 1 without the DC/DC converters of Enable Pin, 1 DC/DC converter with Enable Pin, 2 diodes, 2 electric discharge electricity
Resistance, 2 sampling resistors, 2 sampling potentiometers, 1 positive bus-bar and 1 negative busbar；
The positive and negative electrode of battery pack is respectively connected to positive bus-bar and negative busbar；Negative busbar is also respectively connected with " charging interface "
Negative terminal, the negative terminal of " electric discharge interface ", the 2nd point of " control of discharge interface ", the input of " without the DC/DC converters of Enable Pin " bears
End, the 2nd point of the input negative terminal of " the DC/DC converters with Enable Pin " and 2 discharge resistances；The anode connection of charging interface
To the OUT_A ends of two-way solid-state relay, the anode of the 1st point, first diode of first discharge resistance and first
Sample the 1st, 2 point of potentiometer；The OUT_B ends of two-way solid-state relay are connected to positive bus-bar；The anode of electric discharge interface is connected to
The OUT- ends of unidirectional solid-state relay and the 1st point of second discharge resistance；The OUT+ ends of two unidirectional solid-state relays connect
To positive bus-bar；The OUT- ends of first unidirectional solid-state relay be connected to electric discharge interface anode and second discharge resistance the
1 point；Enabled be connected to control of discharge interface the 1st point of " without the DC/DC converters of Enable Pin "；Second unidirectional solid-state after
The OUT- ends of electric appliance be connected to the 2nd diode anode and the 1st, 2 point of second sampling potentiometer；Two diodes it is negative
End is commonly connected to the IN+ ends of " without the DC/DC converters of Enable Pin "；The output of " without the DC/DC converters of Enable Pin "
OUT+ ends are connected to the VCC ends of BMS controllers；The output OUT- ends of " without the DC/DC converters of Enable Pin " are connected to BMS controls
The GND ends of device processed, the 2nd point of two sampling resistors, the input of two-way solid-state relay bear IN- points and first unidirectional solid-state after
IN- points are born in the input of electric appliance；The sampling end AD1 of BMS controllers is connected to and sampling resistor of first sampling potentiometer at the 3rd point
The 1st point；The sampling end AD2 of BMS controllers is connected to the 1st point of the 3rd point of second sampling potentiometer and sampling resistor；
The IO control signals IO1 of BMS controllers is connected to the positive IN+ points of input of the 1st unidirectional solid-state relay；The IO of BMS controllers
Control signal IO2 is connected to the positive IN+ points of input of two-way solid-state relay.
In control circuit structural representation shown in the present embodiment, battery pack U3 and BMS controller U4 is the prior art
The component included in middle battery pack, charging interface X1, electric discharge interface X2 and the control of discharge that in addition battery pack has connect
Mouthful X3 is also the intrinsic external interface of general battery pack, therefore above-described battery pack U3, BMS controller U4, charging
Mouth X1, electric discharge interface X2 and control of discharge interface X3 are not the content of the invention of this patent, but are filled in order to illustrate battery pack of the present invention
Electricity, electric discharge and supplying power for outside control method are, it is necessary to reference to battery pack U3, BMS controller U4, charging interface X1, electric discharge interface
X2 and control of discharge interface X3 illustrate together.
In the prior art, internal battery pack contains " battery pack " and " BMS controllers ", and the external interface of battery pack generally wraps
Containing " electric discharge interface ", " charging interface " and " control of discharge interface " these three interfaces, by controlling in " control of discharge interface "
Turn-on and turn-off between two core points, to control the external electric discharge of battery pack.A kind of battery pack provided in this embodiment charges,
Electric discharge and supplying power for outside control circuit, in " battery pack " and " BMS controllers " between external interface, using it is a kind of charging,
Electric discharge and supplying power for outside control method, solving the battery pack mentioned in background technology, " when not charging, charging interface cannot have electricity
Pressure；When not discharging, electric discharge interface cannot have voltage；When not charging, not discharging, battery pack control circuit cannot consume battery in itself
3 problems of electricity ".
Based on above-mentioned control circuit, the embodiment of the present invention provides a kind of charging, electric discharge and supplying power for outside control method,
It is characterized in that, this method includes procedure below：
When needing to charge to battery, directly charging interface it is positive and negative between plus DC charging voltage, BMS controls
After device samples the signal by AD1 sampling ends, BMS controllers control the output port of two-way solid-state relay by I/O signal
It is turned between OUT_A and OUT_B, charging voltage charges to battery pack by the bidirectional relay；
When battery needs electric discharge, by the 1 of control of discharge interface, 2 liang of core short circuit, " the DC/DC converters with Enable Pin "
Receive low level enable signal, " the DC/DC converters with Enable Pin " start, " the DC/DC converters with Enable Pin " it is defeated
A DC voltage is generated between outlet OUT+ and OUT-, between the output OUT+ and OUT- that make second unidirectional solid-state relay
Conducting, after BMS controllers sample the signal by AD2 sampling ends, BMS controllers control the 1st unidirectionally to consolidate by I/O signal
It is turned between the output port OUT+ and OUT- of state relay, battery pack is externally discharged by the unidirectional solid-state relay；
When not charging, obstructed between the main track and positive bus-bar of charging interface by a two-way solid-state relay, therefore not
During charging, charging interface does not have voltage.
When not discharging, when discharging and obstructed between interface and positive bus-bar by a unidirectional solid-state relay, therefore not discharging,
Electric discharge interface does not have voltage.
When not charging, not discharging, i.e., charging interface does not have voltage, while does not have between 1,2 two point in control of discharge interface
In the case of having short circuit：" the DC/DC converters with Enable Pin " does not work due to not having " to enable " signal；" without enabled
The DC/DC converters at end " are not worked due to no input voltage；And BMS controllers are due to no input voltage,
Also do not work.There is no the equipment for consuming battery power under the state, in control circuit, it can be deduced that conclusion：Battery pack control electricity
Road cannot consume battery electricity itself.
A kind of battery pack provided in this embodiment charges, electric discharge and supplying power for outside control method, in " battery pack " and
" BMS controllers ", using a kind of charging, electric discharge and supplying power for outside control method, solves background technology between external interface
In the battery pack mentioned " when not charging, charging interface cannot have voltage；When not discharging, electric discharge interface cannot have voltage；It does not fill
Electricity, when not discharging, battery pack control circuit cannot consume battery electricity itself " 3 problems.
The present invention is done with reference to the accompanying drawings and detailed description and is further described in detail.
As shown in Figure 1, the specific embodiment of a kind of charging, electric discharge and supplying power for outside control method, is by one
Group circuit includes two-way solid-state relay K1, unidirectional solid-state relay K2, the DC/DC converters without Enable Pin come what is realized
DC/DC1, the DC/DC converters DC/DC2 with Enable Pin, diode V1, diode V2, discharge resistance R1, discharge resistance R2, adopt
Sample resistance R3, sampling resistor R4, sampling potentiometer W1, sampling potentiometer W2, positive bus-bar U1 and negative busbar U2 compositions.
The positive and negative electrode of battery pack U3 is respectively connected to positive bus-bar U1 and negative busbar U2；Negative busbar U2 is also respectively connected with charging
The "-" end of interface X1, the "-" end of electric discharge interface X2, " 2 " point, the DC/DC converters without Enable Pin of control of discharge interface X3
" IN- " input negative terminal of DC/DC1, " IN- " input negative terminal of the DC/DC converters DC/DC2 with Enable Pin, discharge resistance R1
" 2 " are put and " 2 " point of discharge resistance R2；The "+" end of charging interface X1 be connected to two-way solid-state relay K1 OUT_A ends,
The the 1st, 2 point of " 1 " point of discharge resistance R1, the "+" end of diode V1 and sampling potentiometer W1；Two-way solid-state relay K1
OUT_B ends be connected to positive bus-bar U2；The "+" end of electric discharge interface X2 is connected to OUT- ends and the electric discharge of unidirectional solid-state relay K2
" 1 " point of resistance R2；The OUT+ ends of unidirectional solid-state relay K2, K3 are connected to positive bus-bar U2；Unidirectional solid-state relay K2's
OUT- ends are connected to the "+" end of electric discharge interface X2 and " 1 " point of discharge resistance R2；Without the DC/DC converters DC/ of Enable Pin
Enabled " 1 " points for being connected to control of discharge interface X3 of " EN " of DC1；The OUT- ends of unidirectional solid-state relay K3 are connected to two poles
The "+" end of pipe V2 and " 1,2 " point of sampling potentiometer W2；The "-" end of two diodes V1, V2 are connected to " without enabled
" IN+ " end of the DC/DC converters DC/DC1 " at end；Output " OUT+ " end of " without the DC/DC converters DC/DC1 of Enable Pin "
It is connected to " VCC " end of BMS controllers U4；The output OUT- ends of " without the DC/DC converters DC/DC1 of Enable Pin " are connected to
" GND " end of BMS controllers U4, " 2 " point, " IN- " of two-way solid-state relay K1 of two sampling resistors R3, R4 input negative
The negative point of " IN- " of point and unidirectional solid-state relay K2 inputs；The sampling end " AD1 " of BMS controllers U4 is connected to sampling potentiometer
" 3 " point of W1 and " 1 " point of sampling resistor R3；The sampling end " AD2 " of BMS controllers U4 is connected to sampling potentiometer W2's
" 3 " are put and " 1 " point of sampling resistor R4；The IO control signals " IO1 " of BMS controllers U4 are connected to unidirectional solid-state relay
" IN+ " input of K2 is on schedule；The IO control signals " IO2 " of BMS controllers U4 are being connected to the input of two-way solid-state relay K1 just
IN+ points.
The work of battery pack is divided into charging and discharging two states, during charging, directly charging interface X1 "+", "-" point it
Between can charge to battery plus DC charging voltage；During electric discharge, short circuit between " 1 ", " 2 " control of discharge interface X3, so
It just externally discharges between the electric discharge "+" of interface X2, "-" afterwards.
The power supply of BMS controllers U4 is provided by " without DC/DC converters DC/DC1 of Enable Pin " in battery pack,
Internal logic process flow is as shown in logic process flow figure in the BMS controllers U4 of attached drawing 2.BMS controllers U4 is held first
101 step of row inquiry AD1 signals；Then 102 step of inquiry AD2 signals is performed；Next perform whether judge AD1 signals>“0”
103 steps；If AD1 signals>" 0 " then performs IO1 signals and is set to " high level " 105 step, has performed IO1 signals and has been set to " height
After 105 step of level ", whether execution judges AD2 signals>" 0 " 104 step；If AD1 signals are not>" 0 " then directly performs and sentences
Whether disconnected AD2 signals>" 0 " 104 step；If AD2 signals>" 0 " then performs IO2 signals and is set to " high level " 106 step, hold
After IO2 signals of having gone are set to " high level " 106 step, return re-executes 101 step of inquiry AD1 signals；If AD2 signals are not
>" 0 ", return re-execute 101 step of inquiry AD1 signals；So move in circles.
When needing to charge to battery pack, plus DC charging voltage between "+,-" of charging interface X1, at this point, by
It is not turned in two-way solid-state relay K1, therefore charging voltage can't directly charge to battery pack U3.It is but at this point, straight
Current charge voltage gives the DC/DC converters DC/DC1 without Enable Pin to provide input voltage by diode V1, without Enable Pin
DC/DC converters DC/DC1 start to work, without Enable Pin DC/DC converters DC/DC1 output terminal OUT+ and OUT- it
Between generate a DC voltage, give BMS controllers U4 offer operating voltages, BMS by " VCC " and " GND " of BMS controllers U4
Controller U4 starts to work.It meanwhile can be there are one the voltage value for being more than 0V, when BMS controllers on " 1 " point of sampling resistor R3
When U4 runs attached logic process flow shown in Fig. 2, the voltage for being more than 0V is inquired in 101 step of AD1 signals is inquired about
Whether value, judging AD1 signals>In " 0 " 103 step, it will judge being put as a result, IO1 signals therefore will be performed for "Yes"
For " high level " 105 step, after the IO1 signals of BMS controllers U4 are set to high level, the OUT_ of two-way solid-state relay K1
It is turned between A points and OUT_B points, DC charging voltage charges to battery pack U3 by the two-way solid-state relay K1.Sampling
The effect of potentiometer W1 is exactly the size for the voltage signal for adjusting the sampled point AD1 for being supplied to BMS controllers U4.
When battery needs electric discharge, by 1,2 liang of core short circuit of control of discharge interface X2, " the DC/DC converters with Enable Pin
DC/DC2 " receives low level enable signal " EN ", and " the DC/DC converters DC/DC2 with Enable Pin " starts, " with Enable Pin
A DC voltage is generated between the output terminal OUT+ and OUT- of DC/DC converters DC/DC2 ", to unidirectional solid-state relay K3's
One driving voltage between "+", "-" point is provided, makes to turn between the output OUT+ and OUT- of unidirectional solid-state relay K3.This
When, the voltage on positive bus-bar U1 gives the DC/DC converters DC/ without Enable Pin by unidirectional solid-state relay K3 and diode V2
DC1 provides input voltage, starts to work without the DC/DC converters DC/DC1 of Enable Pin.Without the DC/DC converters of Enable Pin
A DC voltage is generated between the output terminal OUT+ and OUT- of DC/DC1, is given by " VCC " and " GND " of BMS controllers U4
BMS controllers U4 provides operating voltage, and BMS controllers U4 starts to work.Meanwhile have one on " 1 " of sampling resistor R4 point
A voltage value more than 0V, when BMS controllers U4 runs attached logic process flow shown in Fig. 2, in inquiry AD2 signals 102
A voltage value for being more than 0V is inquired in step, whether is judging AD2 signals>In " 0 " 104 step, it will judge "Yes"
As a result, IO2 signals, which therefore will be performed, is set to " high level " 106 step, when the IO2 signals of BMS controllers U4 are set to height
After level, turned between the OUT+ points of unidirectional solid-state relay K2 and OUT- points, the voltage between positive bus-bar U1 and negative busbar U2
It is added to by the unidirectional solid-state relay K2 between "+,-" of electric discharge interface X2, the electric energy in battery pack U3 can pass through electric discharge
Interface X2 externally discharges.The effect of sampling potentiometer W2 is exactly to adjust the voltage for the sampled point AD2 for being supplied to BMS controllers U4
The size of signal.
Due to needing two-way blocking-up voltage between the "+" of charging interface X1 and positive bus-bar U1, employ one it is two-way
Solid-state relay K1；It discharges between the "+" of interface X2 and positive bus-bar U1, it is only necessary to block from positive bus-bar U1 toward electric discharge interface X2's
The unidirectional voltage of "+", therefore employ a unidirectional solid-state relay K2.
Since two-way solid-state relay K1 is not when opening, there are leakage current between OUT_A and OUT_B, therefore employ
Discharge resistance R1 eliminates the leakage current between OUT_A and OUT_B.Since unidirectional solid-state relay K2 is not when opening, OUT+
There are leakage current between OUT-, therefore discharge resistance R2 is employed, eliminate the leakage current between OUT+ and OUT-.
When not charging, obstructed between the "+" of charging interface X1 and positive bus-bar U1 by two-way solid-state relay K1, therefore not
During charging, there is no voltage between "+,-" of charging interface X1.
But when not discharging, obstructed between the "+" of electric discharge interface X2 and positive bus-bar U1 by unidirectional solid-state relay K2, therefore not
During electric discharge, there is no voltage between "+,-" of electric discharge interface X2.
When not charging, not discharging, i.e. there is no voltage between "+,-" of charging interface X1, while in control of discharge interface X2
1,2 two point between there is no short circuit in the case of, " the DC/DC converters DC/DC2 with Enable Pin " be not due to having " to enable " letter
Number, therefore do not work；" without the DC/DC converters DC/DC1 of Enable Pin " is not also worked due to no input voltage；And
BMS controllers U4 is not also worked due to no input voltage.Under the state, without consumption electricity in battery pack control circuit
The equipment of pond electric energy, it can be deduced that conclusion：Battery pack control circuit cannot consume battery electricity itself.
It is described as described above for a kind of embodiment and/or the feature that shows can be in a manner of same or similar at one or more
It is used in a number of other embodiments and/or is combined or substitutes the feature in other embodiments with the feature in other embodiments
It uses.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for one or more other features, one integral piece, step, component or the presence of its combination or additional.
The many features and advantage of these embodiments are clear according to the detailed description, therefore appended claims are intended to
Cover all these feature and advantage fallen into its true spirit and scope of these embodiments.Further, since this field
Technical staff is readily apparent that many modifications and changes, therefore is not meant to the embodiment of the present invention being limited to illustrated and description essence
Really structurally and operationally, but all suitable modifications and the equivalent fallen into the range of it can be covered.
Unspecified part of the present invention is known to the skilled person technology.
Claims (2)
1. a kind of battery pack charging, electric discharge and supplying power for outside control circuit, which is characterized in that the circuit is used to control battery
Bag power supply, the circuit include 1 two-way solid-state relay, 2 unidirectional solid-state relays, 1 DC/DC without Enable Pin and become
Parallel operation, 1 DC/DC converter with Enable Pin, 2 diodes, 2 discharge resistances, 2 sampling resistors, 2 sampling current potentials
Device, 1 positive bus-bar and 1 negative busbar；
The positive and negative electrode of battery pack is respectively connected to positive bus-bar and negative busbar；Negative busbar is also respectively connected with the negative terminal of charging interface, puts
The negative terminal of electrical interface, the 2nd of control of discharge interface the point, without Enable Pin DC/DC converters input negative terminal, with Enable Pin
The 2nd point of the input negative terminal of DC/DC converters and 2 discharge resistances；The anode of charging interface is connected to two-way solid-state relay
The OUT_A ends of device, first discharge resistance the 1st point, first diode anode and first sampling potentiometer
1st, 2 points；The OUT_B ends of two-way solid-state relay are connected to positive bus-bar；The anode of electric discharge interface is connected to unidirectional solid-state relay
OUT- ends and the 1st point of second discharge resistance；The OUT+ ends of two unidirectional solid-state relays are connected to positive bus-bar；First
The OUT- ends of unidirectional solid-state relay be connected to electric discharge interface anode and the 1st point of second discharge resistance；With Enable Pin
Enabled be connected to control of discharge interface the 1st point of DC/DC converters；The OUT- ends of second unidirectional solid-state relay are connected to
The anode of 2nd diode and the 1st, 2 point of second sampling potentiometer；The negative terminal of two diodes be commonly connected to " without
The IN+ ends of the DC/DC converters of Enable Pin "；BMS controls are connected to without the output OUT+ ends of the DC/DC converters of Enable Pin
The VCC ends of device；The GND ends of BMS controllers, two samplings are connected to without the output OUT- ends of the DC/DC converters of Enable Pin
The 2nd point of resistance, the input of the input of two-way solid-state relay negative IN- points and first unidirectional solid-state relay bear IN- points；
The sampling end AD1 of BMS controllers is connected to the 1st point of the 3rd point of first sampling potentiometer and sampling resistor；BMS controllers
Sampling end AD2 be connected to the 1st point of the 3rd point of second sampling potentiometer and sampling resistor；The IO control letters of BMS controllers
Number IO1 is connected to the positive IN+ points of input of the 1st unidirectional solid-state relay；The IO control signals IO2 of BMS controllers is connected to double
To the positive IN+ points of input of solid-state relay.
2. a kind of charging realized based on circuit described in claim 1, electric discharge and supplying power for outside control method, feature are existed
In this method includes procedure below：
When needing to charge to battery, directly charging interface it is positive and negative between plus DC charging voltage, BMS controllers lead to
It crosses after AD1 sampling ends sample the signal, BMS controllers control the output port OUT_ of two-way solid-state relay by I/O signal
It is turned between A and OUT_B, charging voltage charges to battery pack by the bidirectional relay；
When battery needs electric discharge, by the 1 of control of discharge interface, 2 liang of core short circuit, the DC/DC converters with Enable Pin receive
Low level enable signal, DC/DC converters with Enable Pin start, the output terminal OUT+ of the DC/DC converters with Enable Pin and
A DC voltage is generated between OUT-, makes to turn between the output OUT+ and OUT- of second unidirectional solid-state relay, BMS controls
After device processed samples the signal by AD2 sampling ends, BMS controllers control the 1st unidirectional solid-state relay by I/O signal
It is turned between output port OUT+ and OUT-, battery pack is externally discharged by the unidirectional solid-state relay；
When not charging, obstructed between the main track and positive bus-bar of charging interface by a two-way solid-state relay, make charging interface
There is no voltage.
When not discharging, discharge and obstructed between interface and positive bus-bar by a unidirectional solid-state relay, make electric discharge interface without electricity
Pressure.
Charging interface does not have voltage, while does not have short circuit between 1,2 two point in control of discharge interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021002.4A CN108075527B (en) | 2016-11-15 | 2016-11-15 | Method for charging and discharging battery pack and controlling external power supply |
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| CN201611021002.4A CN108075527B (en) | 2016-11-15 | 2016-11-15 | Method for charging and discharging battery pack and controlling external power supply |
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| CN108075527B (en) | 2020-11-13 |
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