CN109177780A - Charging control method and device and electric automobile - Google Patents
Charging control method and device and electric automobile Download PDFInfo
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- CN109177780A CN109177780A CN201811148922.1A CN201811148922A CN109177780A CN 109177780 A CN109177780 A CN 109177780A CN 201811148922 A CN201811148922 A CN 201811148922A CN 109177780 A CN109177780 A CN 109177780A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 description 12
- 238000004804 winding Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 235000008434 ginseng Nutrition 0.000 description 1
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- H02J7/045—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The embodiment of the invention provides a charging control method and device and an electric automobile. The charging control method comprises the following steps: the charging control module determines a first working frequency value according to a difference value between a voltage set value and a voltage feedback value of the high-voltage battery; the charging control module determines a second working frequency value according to the difference value between the voltage set value and the voltage feedback value of the input voltage of the voltage reduction unit; the charging control module determines a third working frequency value according to the difference value between the current set value and the current feedback value of the high-voltage battery; and the charging control module determines the working frequency of the components in the direct current/direct current conversion unit according to the first working frequency value, the second working frequency value and the third working frequency value, and controls the components in the direct current/direct current conversion unit to work according to the working frequency. In the embodiment of the invention, the normal charging of the high-voltage battery is ensured, and the normal charging of the low-voltage battery is also ensured.
Description
Technical field
The present embodiments relate to automobile technical field more particularly to a kind of charge control methods, device and electric car.
Background technique
The vehicle-mounted power supply of electric car mainly includes Vehicular charger power module and Vehicular direct-current voltage transformation module at present.
But as the weight of electric car, cost and requirement spatially are more and more harsher, integrated vehicle power supply comes into being.Such as
It is the circuit topology figure of integrated vehicle power supply, for integrated vehicle power supply, using a transformer (i.e. in figure shown in Fig. 1
Transformer T1) can be realized while charging for high-tension battery and A-battery.To change vehicle power supply be high-tension battery and low when one
When piezoelectric battery charges, switching tube M5~M8 is opened, and transmits energy to high-tension battery and A-battery by transformer TI.Wherein,
High voltage side of transformer winding is as main output, and step down side winding is as auxiliary output.But existing integrated vehicle power supply
Have a problem that, i.e., after high-tension battery is fully charged, switching tube M5~M8 can be closed, lead to not to continue to A-battery into
Row charges normal.
Summary of the invention
The embodiment of the invention provides a kind of charge control method, device and electric cars, to solve for the prior art
In integrated vehicle power supply can not continue the problem of A-battery is charged normal after charging to high-tension battery.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
One aspect according to an embodiment of the present invention provides a kind of charge control method, is applied to integrated vehicle electricity
Source, the integrated vehicle power supply include: charging circuit and the charge control module that is electrically connected with the charging circuit；
Wherein, the charging circuit includes: power factor correction unit；It is electrically connected with the power factor correction unit
The high-voltage output end of DC/DC conversion unit, the DC/DC conversion unit is electrically connected with the high-tension battery of automobile；With
The pressure unit of the low-voltage output electrical connection of the DC/DC conversion unit, the output end and automobile of the pressure unit
A-battery electrical connection；
Wherein, the charge control module respectively with the power factor correction unit, the DC/DC conversion list
First, the described pressure unit, the high-tension battery and A-battery electrical connection；
Wherein, the charge control method includes:
The charge control module determines according to the voltage setting value of the high-tension battery and the difference of voltage feedback value
One operating frequency value；
The charge control module is according to the voltage setting value of the input voltage of the pressure unit and voltage feedback value
Difference determines the second operating frequency value；
The charge control module determines according to the current setting value of the high-tension battery and the difference of current feedback values
Three operating frequency values；
The charge control module is according to first operating frequency value, second operating frequency value and the third work
Working frequency value, determines the working frequency of the component in the DC/DC conversion unit, and controls the DC/DC and become
The component changed in unit works according to the working frequency.
Further, according to first operating frequency value, second operating frequency value and the third working frequency
Value, determines the working frequency of the component in the DC/DC conversion unit, comprising:
By the biggish operating frequency value of numerical value in first operating frequency value and second operating frequency value, as ginseng
Examine working frequency；
By the lesser operating frequency value of numerical value in the reference work frequency and the third operating frequency value, it is determined as institute
State the working frequency of the component in DC/DC conversion unit.
Further, the voltage setting value of the input voltage of the pressure unit is less than or equal to the high-tension battery most
The voltage value that low-voltage is calculated according to the no-load voltage ratio value of the transformer in the DC/DC conversion unit.
Other side according to an embodiment of the present invention provides a kind of battery charge controller, is applied to integrated vehicle
Power supply, the integrated vehicle power supply include: charging circuit and the charge control module that is electrically connected with the charging circuit；
Wherein, the charging circuit includes: power factor correction unit；It is electrically connected with the power factor correction unit
The high-voltage output end of DC/DC conversion unit, the DC/DC conversion unit is electrically connected with the high-tension battery of automobile；With
The pressure unit of the low-voltage output electrical connection of the DC/DC conversion unit, the output end and automobile of the pressure unit
A-battery electrical connection；
Wherein, the charge control module respectively with the power factor correction unit, the DC/DC conversion list
First, the described pressure unit, the high-tension battery and A-battery electrical connection；
Wherein, the battery charge controller includes:
First adjustment module, it is anti-according to the voltage setting value and voltage of the high-tension battery for the charge control module
The difference of feedback value determines the first operating frequency value；
Second adjustment module is set for the charge control module according to the voltage of the input voltage of the pressure unit
The difference of value and voltage feedback value, determines the second operating frequency value；
Third adjustment module, it is anti-according to the current setting value and electric current of the high-tension battery for the charge control module
The difference of feedback value determines third operating frequency value；
Control module, for the charge control module according to first operating frequency value, second working frequency
Value and the third operating frequency value, determine the working frequency of the component in the DC/DC conversion unit, and control institute
The component stated in DC/DC conversion unit works according to the working frequency.
Further, the control module includes:
First control unit, for numerical value in first operating frequency value and second operating frequency value is biggish
Operating frequency value, as reference work frequency；
Second control unit is used for the lesser work of numerical value in the reference work frequency and the third operating frequency value
Working frequency value is determined as the working frequency of the component in the DC/DC conversion unit.
Further, the voltage setting value of the input voltage of the pressure unit is less than or equal to the high-tension battery most
The voltage value that low-voltage is calculated according to the no-load voltage ratio value of the transformer in the DC/DC conversion unit.
Other side according to an embodiment of the present invention provides a kind of microcontroller, comprising: memory, processor and
The computer program that can be run on a memory and on a processor is stored, when the computer program is executed by the processor
The step of realizing charge control method as described above.
Other side according to an embodiment of the present invention provides a kind of electric car, including control of charging as described above
Device processed.
The beneficial effects of the present invention are:
In the embodiment of the present invention, it not only is provided with loop adjustment strategy in high-pressure side, is also provided with loop tune in low-pressure side
Section strategy, since the charging situation on high-tension side charging situation and low-pressure side is considered, can not only guarantee
High-tension battery charges normal, it is also ensured that A-battery charges normal.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 shows the circuit topology figures of integrated vehicle power supply provided in an embodiment of the present invention；
Fig. 2 indicates the flow chart of charge control method provided in an embodiment of the present invention；
Fig. 3 indicates the block diagram of charge control method provided in an embodiment of the present invention；
Fig. 4 indicates the block diagram of battery charge controller provided in an embodiment of the present invention.
Specific embodiment
The exemplary embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although showing the present invention in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
It is limited.It is to be able to thoroughly understand the present invention on the contrary, providing these embodiments, and can be by the scope of the present invention
It is fully disclosed to those skilled in the art.
One aspect according to an embodiment of the present invention provides a kind of charge control method, is applied to integrated vehicle electricity
Source.
Wherein, which includes: charging circuit and the charge control mould for controlling charging circuit charging
Block.The charge control module is electrically connected with the charging circuit.
Specifically, as shown in Figure 1, the charging circuit includes: power factor correction unit (i.e. PFC (Power Factor
Correction) unit), the DC/DC conversion unit (i.e. DC/DC converter unit) and and DC/ that are electrically connected with PFC unit
The pressure unit (i.e. BUCK unit) of the low-voltage output electrical connection of DC converter unit.Wherein, charge control module respectively with PFC
The A-battery E2 electrical connection of unit, DC/DC converter unit, BUCK unit, the high-tension battery E1 of automobile and automobile, to control
Charging circuit charges to high-tension battery and A-battery.
Wherein, PFC unit is used to the alternating voltage that firewire (L) and zero curve (N) input being changed into steady dc voltage,
Steady dc voltage is provided for DC/DC converter unit.
Wherein, DC/DC converter unit is used to the DC voltage that PFC unit exports being changed into adjustable DC voltage, is
High-tension battery charging, while input voltage is provided for BUCK unit.The output of the input terminal and PFC unit of DC/DC converter unit
End electrical connection, the high-voltage output end of DC/DC converter unit are electrically connected with high-tension battery, and low-voltage output is electrically connected with BUCK unit
It connects.
Wherein, BUCK unit charges for reducing voltage for A-battery, and powers for low-pressure system.BUCK unit
Input terminal is electrically connected with the low-voltage output of DC/DC converter unit, and the output end of BUCK unit is electrically connected with A-battery.
Specifically, as shown in Figure 1, in the embodiment of the present invention, DC/DC converter unit includes:
First switch tube M1, second switch M2, third switching tube M3, the 4th switching tube M4, the 5th switching tube M5, the 6th
Switching tube M6, the 7th switching tube M7, the 8th switching tube M8, the first inductance L1, first capacitor C1, the second capacitor C2, third capacitor
C3, first diode D1, the second diode D2D2 and transformer T1.
Wherein, the drain electrode of first switch tube M1 is electrically connected with the cathode output end of PFC unit, the source electrode of first switch tube M1
It is electrically connected with the drain electrode of second switch M2.The source electrode of second switch M2 is electrically connected with the cathode output end of PFC unit.Third
The drain electrode of switching tube M3 is electrically connected with the drain electrode of first switch tube M1, the leakage of the source electrode and the 4th switching tube M4 of third switching tube M3
Pole electrical connection.The source electrode of 4th switching tube M4 is electrically connected with the source electrode of second switch M2.The first end of first inductance L1 is distinguished
For the drain electrode electrical connection of the source electrode and the 4th switching tube M4 of third switching tube M3, second end and transformer the T1 electricity of the first inductance L1
Connection.The first end of first capacitor is electrically connected with the drain electrode of the source electrode of first switch tube M1 and second switch M2 respectively, and first
The second end of capacitor C1 is electrically connected with transformer T1.The high-pressure side winding of transformer T1 respectively with the source electrode of the 5th switching tube M5 and
The drain electrode of 6th switching tube M6 is electrically connected.The source electrode of 5th switching tube M5 is electrically connected with the drain electrode of the 6th switching tube M6, and the 5th opens
The drain electrode for closing pipe M5 is electrically connected with the drain electrode of the 7th switching tube M7.The source electrode of 6th switching tube M6 and the source electrode of the 8th switching tube M8
Electrical connection.The drain electrode of 7th switching tube M7 is connect with the high-voltage positive electrode output end also with DC/DC converter unit, the 7th switching tube M7
Source electrode be electrically connected with the drain electrode of the 8th switching tube M8.The source electrode of 8th switching tube M8 is also negative with the high pressure of DC/DC converter unit
The electrical connection of pole output end.The first end of second capacitor C2 is connect with the high-pressure side winding of transformer T1, and the second of the second capacitor C2
End is electrically connected with the drain electrode of the source electrode and the 8th switching tube M8 of the 7th switching tube M7 respectively.The cathode and transformation of first diode D1
The anode of the electrical connection of device T1 low-pressure side winding, first diode D1 is electrically connected with the second end of third capacitor C3.Second diode
The cathode of D2 is electrically connected with transformer T1 low-pressure side winding, and the second end of the anode and third capacitor C3 of the second diode D2 is electrically connected
It connects.The low-pressure side winding of transformer T1 is also electrically connected with the first end of third capacitor C3.The first end of third capacitor C3 also with DC/
The low pressure electrode input end of DC converter unit is electrically connected, and the second end of third capacitor C3 is also negative with the low pressure of DC/DC converter unit
The electrical connection of pole input terminal.
The embodiment of the present invention is directed to above-mentioned integrated vehicle power supply, provides a kind of charge control method, as shown in Fig. 2,
The charge control method includes:
Step 201, charge control module determine according to the voltage setting value of high-tension battery and the difference of voltage feedback value
One operating frequency value.
Wherein, the voltage setting value of high-tension battery described here is preset voltage value, general voltage setting
Value is equal to the maximum voltage value of high-tension battery.The voltage feedback value of high-tension battery described here is the virtual voltage of high-tension battery
Value.
By the voltage setting value of high-tension battery and the difference of voltage feedback value, it can reflect the charging feelings of high-tension battery
Condition.For example, if the voltage setting value of high-tension battery and the difference of voltage feedback value are greater than 0, (i.e. voltage feedback value is set less than voltage
Definite value), then illustrate high-tension battery also underfill electricity, charge control module is according to loop adjustment strategy at this time, according to high-tension battery
Voltage setting value and voltage feedback value difference, output numerical value be greater than 0 operating frequency value, continued as with controlling charging circuit
High-tension battery charging；If the voltage setting value of high-tension battery and the difference of voltage feedback value are equal to 0, (i.e. voltage feedback value is equal to electricity
Press setting value), then illustrate that high-tension battery has been filled with electricity, charge control module is according to loop adjustment strategy at this time, according to high-voltage electricity
The voltage setting value in pond and the difference of voltage feedback value, output numerical value are equal to 0 operating frequency value, to control charging circuit stopping
For high-tension battery charging.
Wherein, the first operating frequency value is likely to be used for adjusting the working frequency of the component in DC/DC converter unit,
The component in DC/DC converter unit is set to carry out charging work according to the first working frequency.
Step 202, charge control module are according to the voltage setting value of the input voltage of BUCK unit and voltage feedback value
Difference determines the second operating frequency value.
Wherein, the input voltage (hereinafter referred to as voltage V1) of BUCK unit is high voltage side battery voltage (i.e. transformer voltage)
It is calculated by the no-load voltage ratio of the transformer in DC/DC converter unit, for example, if high voltage side battery voltage is 300V, transformation
The ratio between device high-pressure side winding and low-pressure side umber of turn (i.e. no-load voltage ratio) are 20:1, then voltage V1 is 15V.
Wherein, the voltage setting value of voltage V1 described here is preset voltage value, the general voltage setting value
Less than the voltage value that the ceiling voltage of high-tension battery is calculated according to the no-load voltage ratio value of the transformer in DC/DC converter unit, greatly
In the maximum voltage value of A-battery.The voltage feedback value of voltage V1 described here is the actual voltage value of voltage V1.
Wherein, if the difference of the voltage setting value of voltage V1 and voltage feedback value is greater than 0, (i.e. voltage feedback value is less than voltage
Setting value), charge control module is according to loop adjustment strategy, according to the difference of the voltage setting value of voltage V1 and voltage feedback value
Value, output numerical value are greater than 0 operating frequency value, continue as A-battery charging to control charging circuit.If the voltage of voltage V1
Setting value and the difference of voltage feedback value were equal to for 0 (i.e. voltage feedback value is equal to voltage setting value), and charge control module is according to ring
Road adjusts strategy, and according to the difference of the voltage setting value of voltage V1 and voltage feedback value, output numerical value is equal to 0 working frequency
Value stops being that A-battery charges to control charging circuit.
Wherein, the second operating frequency value is also possible to the work frequency for the component being used to adjust in DC/DC converter unit
Rate makes the component in DC/DC converter unit carry out charging work according to the second working frequency.
Step 203, charge control module determine according to the current setting value of high-tension battery and the difference of current feedback values
Three operating frequency values.
Wherein, the current setting value of high-tension battery described here is preset current value, general electric current setting
Value is equal to the maximum current value of high-tension battery.The current feedback values of high-tension battery described here are the actual current of high-tension battery
Value.Charge control module can be according to loop adjustment strategy, according to the difference of the current setting value of high-tension battery and current feedback values
Value, determines an operating frequency value, and the charging current of high-tension battery is limited by the operating frequency value.
Wherein, third operating frequency value is also possible to the work frequency for the component being used to adjust in DC/DC converter unit
Rate makes the component in DC/DC converter unit carry out charging work according to third working frequency.
Step 204, charge control module are according to the first operating frequency value, the second operating frequency value and third working frequency
Value, determines the working frequency of the component in DC/DC converter unit, and control the component in DC/DC converter unit according to this
Working frequency works.
It is anti-according to the voltage setting value of high-tension battery and voltage respectively according to loop adjustment strategy in the embodiment of the present invention
The difference of feedback value determines an operating frequency value (i.e. the first operating frequency value), anti-according to the voltage setting value and voltage of voltage VI
The difference of feedback value determine an operating frequency value (i.e. the second operating frequency value) and according to the current setting value of high-tension battery and
The difference of current feedback values determines an operating frequency value (i.e. third operating frequency value), then according to three work determined
Frequency values, determine the working frequency of the component in DC/DC converter unit, and the component controlled in DC/DC converter unit is pressed
Charging work is carried out according to the working frequency.
In the embodiment of the present invention, loop adjustment strategy not only is provided in high-pressure side and (is set according to the voltage of high-tension battery
Value and the difference of voltage feedback value determine an operating frequency value and current setting value and current feedback values according to high-tension battery
Difference, determine an operating frequency value), also low-pressure side be provided with loop adjustment strategy (i.e. according to the input of BUCK unit
The voltage setting value of voltage and the difference of voltage feedback value, determine an operating frequency value), due to on high-tension side charging situation
The working frequency for being considered with the charging situation of low-pressure side, therefore being finally determined, can not only guarantee high-tension battery
Charge normal, it is also ensured that A-battery charges normal.
It should be noted that not necessarily sequentially to be executed in the specific implementation, foundation for step 201 to step 203
Actual demand, these three steps can be executed sequentially, also be may be performed simultaneously, and concrete condition can design according to the actual situation, this
Inventive embodiments are to this without limiting.
The explanation also needed, for loop adjustment strategy described in the embodiment of the present invention, voltage (electric current) setting
Value is bigger with the difference of voltage (electric current) value of feedback, and the operating frequency value of output is bigger, conversely, the operating frequency value of output is got over
It is small.
Further, it in the embodiment of the present invention, is worked frequently according to the first operating frequency value, the second operating frequency value and third
Rate value determines the working frequency of the component in DC/DC conversion unit, comprising:
By the biggish operating frequency value of numerical value in the first operating frequency value and the second operating frequency value, as reference work frequency
Rate；By the lesser operating frequency value of numerical value in the reference work frequency and third operating frequency value, it is determined as DC/DC conversion
The working frequency of component in unit.
In order to better understand foregoing teachings, it is illustrated by taking Fig. 3 as an example below.
In the embodiment of the present invention, there are three loop adjustment strategies, i.e. loop1, loop2 and loop3 for tool.Loop1 is used for root
An operating frequency value is exported according to the voltage setting value of high-tension battery and the difference of voltage feedback value.Loop2 is used for according to voltage V1
Voltage setting value and voltage feedback value difference export an operating frequency value.Loop3 according to the electric current of high-tension battery for setting
Definite value and the difference of current feedback values export an operating frequency value.
It is assumed that the minimum voltage of high-tension battery is 300V, ceiling voltage 400V, voltage setting value 400V.DC/DC becomes
Changing the ratio between high-pressure side winding and the low-pressure side umber of turn of the transformer in unit (i.e. no-load voltage ratio) is 20:1.The voltage of voltage V1 is set
Definite value is 15V.The ceiling voltage of A-battery is 14V.
When high-tension battery charging, the voltage feedback value of voltage V1 is greater than or equal to 15V, and can satisfy BUCK unit is
The charging of 14V A-battery.At this point, the voltage feedback value due to voltage V1 is greater than or equal to voltage setting value, loop2 is defeated
Operating frequency value out is minimum (generally 0).And the voltage setting value of high-tension battery is greater than voltage feedback value, therefore, loop1 is defeated
Operating frequency value out is not 0.After taking greatly to the loop1 and loop2 operating frequency value exported, selection is that loop1 is exported
Operating frequency value.
Wherein, in order to limit the charging current of high-tension battery, for selection loop1 output operating frequency value with
Loop3 is gone back between the operating frequency value (being not 0) according to the difference output of the current setting value and current feedback values of high-tension battery
The operating frequency value small, this is finally chosen is taken, the working frequency as the component in DC/DC converter unit.Due to most
The operating frequency value chosen afterwards is not 0, and therefore, switching tube M5~M8 is in the open state, and charging circuit can be high-tension battery
It charges with A-battery.
When high-tension battery is fully charged, the voltage setting value of high-tension battery is equal with voltage feedback value, the work of loop1 output
Working frequency value can adjust minimum (generally 0).And the voltage setting value of voltage V1 is less than voltage feedback value (according to no-load voltage ratio at this time
Calculate, voltage feedback value is 20V at this time), therefore, the operating frequency value of loop2 output is also adjusted to minimum (generally 0).It is right
After the operating frequency value of loop1 and loop2 output takes greatly, the operating frequency value selected is 0, then the work with loop3 output
Frequency values take hour, and the operating frequency value finally selected is still 0, then switching tube M5~M8 is closed, and energy cannot transmit.Due to
Energy cannot transmit, and the voltage of transformer is caused to decline, at the same the voltage value of voltage V1 also with transformer voltage decline and
Decline.When the voltage value of voltage V1 deteriorates to less than the voltage setting value of voltage V1, the operating frequency value of loop2 output will be big
In 0, after taking greatly to the operating frequency value of loop1 and loop2 output, what is chosen at this time is the operating frequency value of loop2 output.
The operating frequency value (being not 0) that the loop2 and loop3 that continue for selection are exported take it is small after, work that this is finally chosen
Frequency values, as the working frequency of the component in DC/DC converter unit, since the operating frequency value finally chosen is not 0, because
This, switching tube M5~M8 is in the open state, and charging circuit can continue to as A-battery charging.
Preferably due to which high-tension battery fills with electricity at this time, charge without continuing, therefore, in order to avoid continuing at this time
For high-tension battery charging, the voltage setting value of settable voltage V1 is less than or equal to the minimum voltage of high-tension battery according to DC/DC
The voltage value that the no-load voltage ratio value of transformer in converter unit is calculated.Since the voltage feedback value of voltage V1 is up to 15V, then
The voltage of transformer is up to 300V, and the voltage of high-tension battery is greater than 300V, therefore, will not charge for high-tension battery.
In conclusion being not only provided with loop adjustment strategy in high-pressure side in the embodiment of the present invention, also it is arranged in low-pressure side
Loop adjustment strategy, since the charging situation on high-tension side charging situation and low-pressure side is considered, not only
It can guarantee charging normal for high-tension battery, it is also ensured that A-battery charges normal.
Other side according to an embodiment of the present invention provides a kind of battery charge controller, is applied to integrated vehicle
Power supply.The battery charge controller is able to achieve the details in above-mentioned charge control method, and reaches identical effect.
Wherein, which includes: charging circuit and the charge control module that is electrically connected with charging circuit.
Wherein, charging circuit includes: power factor correction unit；The direct current being electrically connected with power factor correction unit/straight
Converter unit is flowed, the high-voltage output end of DC/DC conversion unit is electrically connected with the high-tension battery of automobile；Become with DC/DC
The pressure unit of the low-voltage output electrical connection of unit is changed, the output end of pressure unit is electrically connected with the A-battery of automobile.
Wherein, charge control module respectively with power factor correction unit, DC/DC conversion unit, pressure unit, height
Piezoelectric battery and A-battery electrical connection.
As shown in figure 4, the battery charge controller includes:
First adjustment module 401, for charge control module according to the voltage setting value and voltage feedback value of high-tension battery
Difference, determine the first operating frequency value.
Second adjustment module 402, for charge control module according to the voltage setting value of the input voltage of pressure unit and
The difference of voltage feedback value determines the second operating frequency value.
Third adjustment module 403, for charge control module according to the current setting value and current feedback values of high-tension battery
Difference, determine third operating frequency value.
Control module 404, for charge control module according to the first operating frequency value, the second operating frequency value and third work
Working frequency value, determines the working frequency of the component in DC/DC conversion unit, and controls in DC/DC conversion unit
Component work according to working frequency.
Further, control module 404 includes:
First control unit is used for the biggish working frequency of numerical value in the first operating frequency value and the second operating frequency value
Value, as reference work frequency.
Second control unit is used for the lesser working frequency of numerical value in reference work frequency and third operating frequency value
Value, is determined as the working frequency of the component in DC/DC conversion unit.
Further, the voltage setting value of the input voltage of pressure unit is less than or equal to the minimum voltage root of high-tension battery
The voltage value being calculated according to the no-load voltage ratio value of the transformer in DC/DC conversion unit.
In conclusion being not only provided with loop adjustment strategy in high-pressure side in the embodiment of the present invention, also it is arranged in low-pressure side
Loop adjustment strategy, since the charging situation on high-tension side charging situation and low-pressure side is considered, not only
It can guarantee charging normal for high-tension battery, it is also ensured that A-battery charges normal.
Other side according to an embodiment of the present invention provides a kind of microcontroller, comprising: memory, processor and
Store the computer program that can be run on a memory and on a processor.It is realized such as when the computer program is executed by processor
Above the step of charge control method.
Other side according to an embodiment of the present invention provides a kind of computer readable storage medium.The computer can
It reads to be stored with computer program on storage medium, which realizes charge control as described above when being executed by processor
The step of method.
Other side according to an embodiment of the present invention provides a kind of electric car, including control of charging as described above
Device processed.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (8)
1. a kind of charge control method, be applied to integrated vehicle power supply, the integrated vehicle power supply include: charging circuit and
The charge control module being electrically connected with the charging circuit；
Wherein, the charging circuit includes: power factor correction unit；It is electrically connected with the power factor correction unit straight
The high-voltage output end of stream/DC converting unit, the DC/DC conversion unit is electrically connected with the high-tension battery of automobile；With institute
State the pressure unit of the low-voltage output electrical connection of DC/DC conversion unit, the output end of the pressure unit and automobile
A-battery electrical connection；
Wherein, the charge control module respectively with the power factor correction unit, the DC/DC conversion unit, institute
State pressure unit, the high-tension battery and A-battery electrical connection；
It is characterized in that, the charge control method includes:
The charge control module determines the first work according to the voltage setting value of the high-tension battery and the difference of voltage feedback value
Working frequency value；
The charge control module according to the voltage setting value of the input voltage of the pressure unit and the difference of voltage feedback value,
Determine the second operating frequency value；
The charge control module determines third work according to the current setting value of the high-tension battery and the difference of current feedback values
Working frequency value；
The charge control module works frequently according to first operating frequency value, second operating frequency value and the third
Rate value, determines the working frequency of the component in the DC/DC conversion unit, and controls the DC/DC conversion list
Component in member works according to the working frequency.
2. the method according to claim 1, wherein according to first operating frequency value, second work
Frequency values and the third operating frequency value determine the working frequency of the component in the DC/DC conversion unit, packet
It includes:
By the biggish operating frequency value of numerical value in first operating frequency value and second operating frequency value, as reference work
Working frequency；
By the lesser operating frequency value of numerical value in the reference work frequency and the third operating frequency value, it is determined as described straight
The working frequency of component in stream/DC converting unit.
3. method according to claim 1 or 2, which is characterized in that the voltage of the input voltage of the pressure unit is set
Value is less than or equal to the minimum voltage of the high-tension battery according to the no-load voltage ratio value of the transformer in the DC/DC conversion unit
The voltage value being calculated.
4. a kind of battery charge controller, be applied to integrated vehicle power supply, the integrated vehicle power supply include: charging circuit and
The charge control module being electrically connected with the charging circuit；
Wherein, the charging circuit includes: power factor correction unit；It is electrically connected with the power factor correction unit straight
The high-voltage output end of stream/DC converting unit, the DC/DC conversion unit is electrically connected with the high-tension battery of automobile；With institute
State the pressure unit of the low-voltage output electrical connection of DC/DC conversion unit, the output end of the pressure unit and automobile
A-battery electrical connection；
Wherein, the charge control module respectively with the power factor correction unit, the DC/DC conversion unit, institute
State pressure unit, the high-tension battery and A-battery electrical connection；
It is characterized in that, the battery charge controller includes:
First adjustment module, for the charge control module according to the voltage setting value and voltage feedback value of the high-tension battery
Difference, determine the first operating frequency value；
Second adjustment module, for the charge control module according to the voltage setting value of the input voltage of the pressure unit and
The difference of voltage feedback value determines the second operating frequency value；
Third adjustment module, for the charge control module according to the current setting value and current feedback values of the high-tension battery
Difference, determine third operating frequency value；
Control module, for the charge control module according to first operating frequency value, second operating frequency value and
The third operating frequency value, determines the working frequency of the component in the DC/DC conversion unit, and controls described straight
Component in stream/DC converting unit works according to the working frequency.
5. device according to claim 4, which is characterized in that the control module includes:
First control unit is used for the biggish work of numerical value in first operating frequency value and second operating frequency value
Frequency values, as reference work frequency；
Second control unit is used for the lesser work frequency of numerical value in the reference work frequency and the third operating frequency value
Rate value is determined as the working frequency of the component in the DC/DC conversion unit.
6. device according to claim 4 or 5, which is characterized in that the voltage of the input voltage of the pressure unit is set
Value is less than or equal to the minimum voltage of the high-tension battery according to the no-load voltage ratio value of the transformer in the DC/DC conversion unit
The voltage value being calculated.
7. a kind of microcontroller, which is characterized in that including processor, memory and be stored on the memory and can be described
The computer program run on processor is realized when the computer program is executed by the processor as in claims 1 to 3
The step of described in any item charge control methods.
8. a kind of electric car, which is characterized in that including the battery charge controller as described in any one of claim 4 to 6.
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| CN201811148922.1A CN109177780B (en) | 2018-09-29 | 2018-09-29 | Charging control method and device and electric automobile |
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| CN201811148922.1A CN109177780B (en) | 2018-09-29 | 2018-09-29 | Charging control method and device and electric automobile |
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| CN109177780B CN109177780B (en) | 2020-06-30 |
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| CN112350416A (en) * | 2019-08-09 | 2021-02-09 | 比亚迪股份有限公司 | Electric automobile, vehicle-mounted power supply system and discharge control method thereof |
| WO2022135522A1 (en) * | 2020-12-25 | 2022-06-30 | 中国第一汽车股份有限公司 | Current control method and device, vehicle and storage medium |
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| Publication number | Publication date |
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| CN109177780B (en) | 2020-06-30 |
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