CN106026294B - A kind of charger and its control method - Google Patents
A kind of charger and its control method Download PDFInfo
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- CN106026294B CN106026294B CN201610572490.1A CN201610572490A CN106026294B CN 106026294 B CN106026294 B CN 106026294B CN 201610572490 A CN201610572490 A CN 201610572490A CN 106026294 B CN106026294 B CN 106026294B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 238000013459 approach Methods 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- H02J7/0086—
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of charger and its control methods, it is that automatic voltage regulator and automatic current regulator are set inside frequency converter, when judging that cell voltage value of feedback does not reach first threshold, the first instruction of automatic voltage regulator output, automatic current regulator output is driven to reach or approach permitted maximum charging current, to control battery charging；When judging that cell voltage value of feedback reaches first threshold without reaching cell voltage setting value, the second instruction of automatic voltage regulator output drives automatic current regulator output to be less than the charging current of maximum charging current numerical value, to control battery charging.The present invention additional automatic voltage regulator in charger body, effectively eliminates the error of output voltage.And when it respectively judges that cell voltage value of feedback is more than cell voltage setting value, automatic voltage regulator or peripheral control unit can be controlled separately battery and stop charging, realize duplicate protection, safer.
Description
Technical field
The present invention relates to charge control technology, in particular to a kind of charger and its control method make the equipment such as electric vehicle
Battery the rapidly charging of frequency converter mode may be implemented.
Background technique
In the frequency converter mode rapidly in charger of electric vehicle, control mode so far is that applied current control comes
Management export voltage.Although cell voltage when current control can rapidly charge but is fully charged has error, or even overcharges
The danger of electricity.
Currently, be usually that peripheral control unit is set except rapidly charger body, the one of them of the peripheral control unit
Function is by receiving the actually detected cell voltage arrived, and when cell voltage reaches setting value, control is rapidly in charger
The automatic current regulator (ACR) of portion's setting stops battery and continues to charge.If however, occur the peripheral control unit failure or
Idle situation, battery will charge always, cause to overcharge, and there are serious security risks.
Summary of the invention
The object of the present invention is to provide a kind of charger and its control methods, carry out electricity to the rapidly charging of frequency converter mode
Voltage-controlled system and current control have so that cell voltage when fully charged does not have error, and is able to achieve dual stopping charge protection
Effect prevents battery overcharge.
In order to achieve the above object, the technical solution of the present invention is to provide a kind of control methods of charger, in frequency converter
Inside includes automatic voltage regulator (AVR) and automatic current regulator (ACR), for the charging voltage and charging of battery charging
Electric current is respectively controlled；
By cell voltage setting value and actually measured cell voltage value of feedback, respectively as the input signal of AVR；AVR
Output signal be setting charging current value as control instruction, by itself and actually measured charging current value of feedback, respectively
Input signal as ACR；The control instruction that ACR is sent to it according to AVR controls the charging current of ACR output,
Realize the control charged to battery；
The first threshold whether the cell voltage value of feedback that AVR receives it reaches setting judges；
When cell voltage value of feedback does not reach first threshold, AVR output first instruction, drive ACR according to this first
Output reaches or approaches permitted maximum charging current in instruction in the first stage, to control battery charging；It is described
First stage from starting to charge, until cell voltage value of feedback reaches first threshold；The first threshold is set less than cell voltage
Definite value；
When cell voltage value of feedback reaches first threshold without reaching cell voltage setting value, AVR output second refers to
It enables, drives ACR to be less than the charging current of maximum charging current numerical value according to the second instruction output in second stage, to electricity
Pond charging is controlled；The second stage reaches first threshold from cell voltage value of feedback, until cell voltage value of feedback reaches
To cell voltage setting value.
Preferably, when the cell voltage value of feedback that the AVR judges that it is received reaches cell voltage setting value, the AVR is defeated
Third instructs out, drives ACR to be instructed according to third and stops output charging current, control battery stops charging.
Preferably, it is provided with peripheral control unit except frequency converter, the input signal of the peripheral control unit includes: cell voltage
Setting value and actually measured cell voltage value of feedback；
When the peripheral control unit judges that cell voltage value of feedback is more than cell voltage setting value, peripheral control unit output
ACR is driven to stop the instruction of output charging current, control battery stops charging.
Preferably for different cell voltage setting values, set using respective different voltages value as the first threshold
Value, or setting is using the same voltage value as first threshold.
Preferably, the voltage value obtained after cell voltage setting value being reduced by the percentage of setting is as first threshold；
For different cell voltage setting values, it is identical or different for setting its corresponding percentage.
Preferably, in second stage, the ACR output is less than maximum charging current, and the charging that numerical value is gradually reduced
Electric current carries out the control of battery charging.
Preferably, the cell voltage when cell voltage setting value is full of less than or equal to battery.
Preferably, in the case where the cell voltage when cell voltage setting value is full of less than battery, work as cell voltage
When value of feedback reaches cell voltage setting value, AVR exports the instruction for the charging current for driving ACR no longer to export second stage, and
Change one or more charge modes in constant pressure, constant current, floating charge in frequency converter, carries out the control of battery charging until electricity
Cell voltage value of feedback reaches cell voltage when battery is full of.
Preferably, the peripheral control unit judges that the cell voltage value of feedback that it is received is greater than holding for cell voltage setting value
When continuous time or voltage value are more than the range of setting, peripheral control unit output drives the finger of ACR stopping output charging current
It enables, control battery stops charging.
Another technical solution of the invention is to provide a kind of charger, is internally provided in frequency converter:
Charging circuit is electrically connected between main power source and battery to be charged；
Automatic voltage regulator controls the charging voltage of battery charging；The automatic voltage regulator it is defeated
Entering signal includes: the cell voltage setting value provided it outside frequency converter, and from charging circuit or battery it is actually measured
Cell voltage value of feedback；The output signal of the automatic voltage regulator is the setting charging current value as control instruction；
Automatic current regulator controls the charging current of battery charging；The automatic current regulator it is defeated
Entering signal includes: the output signal of the automatic voltage regulator, and actually measured charging from charging circuit or battery
Current feedback values；The output signal of the automatic current regulator is sent to the charging current of the charging circuit；
Wherein, the automatic voltage regulator is exported to the control instruction of automatic current regulator, is below any one
:
The control instruction is to drive automatic current tune when cell voltage value of feedback does not reach the first threshold of setting
Section device output reaches or approaches the first instruction of permitted maximum charging current；
The control instruction be when cell voltage value of feedback reaches first threshold without reaching cell voltage setting value,
Automatic current regulator output is driven to be less than the second instruction of the charging current of maximum charging current numerical value；
The control instruction is to drive automatic current when cell voltage value of feedback meets or exceeds cell voltage setting value
Adjuster stops the third instruction of output charging current.
Preferably, it is further provided with peripheral control unit outside the frequency converter, the input signal packet of the peripheral control unit
Contain: the cell voltage setting value, and actually measured cell voltage value of feedback from charging circuit or battery；The outside
When the output signal of controller meets or exceeds cell voltage setting value included in cell voltage value of feedback, the automatic electric is driven
Throttle regulator stops the 4th instruction of output charging current.
Preferably, charger described in any of the above-described scheme is the charger to charge to the battery of electric vehicle.
Compared with prior art, charger of the present invention and its control method, the advantage is that: the present invention passes through in urgency
The additional automatic voltage regulator of fast charger body, eliminates the error of output voltage.Different from only passing through external control at present
Device carries out the mode of overcharge management, is to prevent from overcharging by automatic voltage regulator in rapidly charger body in the present invention
Electricity, and further retain the auxiliary control of peripheral control unit, realize the duplicate protection that charging stops, it is safer.
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of the control method of charger of the present invention；
Fig. 2, Fig. 3 are the signal for indicating charging current in two charging examples of the invention and changing with charge rate respectively
Figure.
Specific embodiment
As shown in Figure 1, charger of the present invention, is arranged AVR and ACR simultaneously inside frequency converter, for output
Charging voltage and charging current are respectively controlled.Present invention could apply to the rapidly charging controls of the device batteries such as electric vehicle
System.
Wherein, the cell voltage value of feedback of the cell voltage setting value of external setting-up and actually detected acquisition, respectively as
The input signal of AVR；The output signal of AVR is setting charging current value (as control instruction), with filling for actually detected acquisition
Electric current feedback values, respectively as the input signal of ACR；Using the output signal of ACR, the control charged to battery is realized.
For example, the output signal of ACR, further by various suitable control modes such as vector controlleds, to triode
Grid is controlled；The triode being controlled by it is in the charging circuit of a connection main power source and battery inside frequency converter
Among.
In the frequency converter, the charging circuit of the circuit, main power source to battery that are controlled based on vector controlled or other modes,
To the circuit etc. of cell voltage or charging current acquisition testing, suitable any side can be thought by those skilled in the art
Formula designs, and is herein not listed one by one.
Include control flow below in one specific example of the control method of charger of the present invention:
Cell voltage is set, cell voltage setting value is supplied to AVR；
After starting to charge, AVR receives actually detected cell voltage value of feedback, judges whether it reaches first threshold；It should
First threshold is less than some voltage value of cell voltage setting value.
In different examples, the setting rule of first threshold, for example all provided to different cell voltage setting values
The same suitable voltage value is as first threshold；It is also possible to reduce cell voltage setting value by the percentage that some sets
For obtained voltage value as first threshold, the corresponding percentage of different cell voltage setting values may be prescribed as identical or not phase
With, etc..First threshold can be set by the device outside frequency converter, it is enabled to send jointly to cell voltage setting value
AVR；Can also by AVR itself based on preset configuration setting rule, after receiving cell voltage setting value to first threshold into
Row setting.
At charging initial stage, cell voltage is lower, that is, before AVR judges that cell voltage value of feedback does not reach first threshold,
AVR is sent to ACR indicates that the ACR provides the first instruction of maximum charging current；
ACR exports permitted maximum charging current, carries out the control of battery charging according to the first instruction received；And
And the ACR receives actually detected charging current value of feedback, judges whether it reaches maximum charging current.
As cell voltage rises, when cell voltage value of feedback reaches first threshold, AVR sends to ACR and indicates the ACR
Reduce the second instruction of charging current；
ACR reduces the charging current of its output, continues to execute the control of battery charging according to the second instruction received.
When AVR is according to actually measured cell voltage value of feedback, when judging that it reaches cell voltage setting value, the AVR to
ACR output stops the third instruction of charging, and ACR stops exporting charging current accordingly, and control battery stops charging.
The control method of charger of the present invention, there are two the stages charged for tool: anti-to cell voltage from starting to charge
In first stage when feedback value reaches first threshold, battery is controlled to reach or approach the progress of (permitted) maximum charging current
Charging；
Reach first threshold in cell voltage value of feedback and reaches the second of cell voltage setting value to cell voltage value of feedback
In stage, controls battery and charged with being less than maximum charging current.In some exemplary second stage, it can also be with small
The charging current in maximum charging current and being further gradually reduced carries out battery charging.
Voltage when being full of battery be can be as the cell voltage setting value, then according to above description, in battery
Control charging stops when voltage feedback value reaches setting value.And in other different examples, it is also possible to will be greater than first
Threshold value and be less than full of when cell voltage second threshold, as cell voltage setting value；It can will differ from first threshold
Another suitable voltage value is as second threshold, or cell voltage when will be filled with is reduced by another percentage
Voltage value is as second threshold, so that AVR, when judging that cell voltage value of feedback reaches second threshold, no longer instruction ACR is to drop
The mode of low charging current carries out battery charge control, then it is any other suitable further to execute after second stage
One or more charge modes, such as constant pressure, constant current, floating charge etc., until battery is full of.
As shown in Fig. 2, can reach within about 15 minutes from starting to charge 30% charge rate by taking 25kW charger as an example, then
Charging can achieve 80% charge rate in about 30 minutes.In this example using charge rate 0~70% range as the first stage, make ACR
Battery charge control is carried out close to maximum charging current 60A with output under the instruction of AVR；Charge rate is more than ACR root after 70%
According to the instruction of AVR, the charging current for exporting it is reduced.
As shown in figure 3, can reach within about 10 minutes from starting to charge 30% charge rate by taking 50kW charger as an example, then
Charging can achieve 80% charge rate in about 20 minutes.In this example using charge rate 0~40% range as the first stage, make ACR
Battery charge control is carried out close to maximum charging current 120A with output under the instruction of AVR；Charge rate is more than ACR root after 40%
According to the instruction of AVR, the charging current for exporting it is rapidly reduced.
The peripheral control unit being arranged except charger body is respectively provided with the function for stopping charging with AVR of the present invention
Can, respectively the control action for stopping charging capable of being executed, battery mistake is prevented in another party's failure or in the case where stop working
Charging.
In order to realize auxiliary control action that peripheral control unit stops charging, in the present invention by cell voltage setting value and
Cell voltage value of feedback is supplied to AVR and peripheral control unit simultaneously；Assuming that cell voltage value of feedback reaches setting value 500V, if
AVR is worked normally, then above-mentioned control method, AVR can indicate that ACR stops charging according to the present invention；If AVR failure, outside control
The cell voltage value of feedback that device receives has more than the possibility of 500V, and peripheral control unit is more than for example setting with cell voltage value of feedback
The duration of value sets rule so that cell voltage value of feedback is more than the numerical value of setting value, and AVR is judged when rule meets
Failure is directly indicated that ACR executes the control for stopping charging by peripheral control unit.Therefore, the control of charger of the present invention
Method can play duplicate protection to battery, effectively prevent overcharge, safer.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (11)
1. a kind of control method of charger, to prevent battery overcharge, which is characterized in that
Inside frequency converter include automatic voltage regulator and automatic current regulator, for battery charging charging voltage and fill
Electric current is respectively controlled；
By cell voltage setting value and actually measured cell voltage value of feedback, the input respectively as automatic voltage regulator is believed
Number；The output signal of automatic voltage regulator is the setting charging current value as control instruction, it is filled with actually measured
Electric current feedback values, respectively as the input signal of automatic current regulator；Automatic current regulator is adjusted according to automatic voltage
The control instruction that device is sent to it controls the charging current of automatic current regulator output, realizes and charge to battery
Control；
The first threshold whether the cell voltage value of feedback that automatic voltage regulator receives it reaches setting judges；
When cell voltage value of feedback does not reach first threshold, the first instruction of automatic voltage regulator output drives automatic electric
Throttle regulator reaches or approaches permitted maximum charging current according to output in first instruction in the first stage, to battery
Charging is controlled；The first stage from starting to charge, until cell voltage value of feedback reaches first threshold；First threshold
Value is less than cell voltage setting value；
When cell voltage value of feedback reaches first threshold without reaching cell voltage setting value, automatic voltage regulator output
Second instruction drives automatic current regulator to be less than maximum charging current numerical value according to the second instruction output in second stage
Charging current, come to battery charging control；The second stage reaches first threshold from cell voltage value of feedback, until
Cell voltage value of feedback reaches cell voltage setting value；
Peripheral control unit is additionally provided with except frequency converter, the input signal of the peripheral control unit includes: cell voltage setting value and
Actually measured cell voltage value of feedback；The peripheral control unit judges that cell voltage value of feedback is more than cell voltage setting value
When, peripheral control unit output drives automatic current regulator to stop the instruction of output charging current, controls battery and stops charging.
2. the control method of charger as described in claim 1, which is characterized in that
When the cell voltage value of feedback that the automatic voltage regulator judges that it is received reaches cell voltage setting value, the automatic electric
Adjuster output third instruction is pressed, drives automatic current regulator to be instructed according to third and stops output charging current, control battery
Stop charging.
3. the control method of charger as described in claim 1, which is characterized in that
It for different cell voltage setting values, sets using respective different voltages value as first threshold, or setting
Using the same voltage value as first threshold.
4. the control method of charger as described in claim 1, which is characterized in that
The voltage value obtained after cell voltage setting value is reduced by the percentage of setting is as first threshold；For different electricity
Cell voltage setting value, it is identical or different for setting its corresponding percentage.
5. the control method of charger as described in claim 1, which is characterized in that
In second stage, the automatic current regulator output is less than maximum charging current, and the charging that numerical value is gradually reduced
Electric current carries out the control of battery charging.
6. the control method of charger as described in claim 1, which is characterized in that
Cell voltage when the cell voltage setting value is full of less than or equal to battery；
In the case where cell voltage when the cell voltage setting value is full of less than battery, when cell voltage value of feedback reaches electricity
When cell voltage setting value, automatic voltage regulator exports the charging current for driving automatic current regulator no longer to export second stage
Instruction, and change one or more charge modes in constant pressure, constant current, floating charge in frequency converter, carry out battery charging
Control reaches cell voltage when battery is full of until cell voltage value of feedback.
7. the control method of charger as claimed in claim 2, which is characterized in that
Cell voltage when the cell voltage setting value is full of less than or equal to battery；
In the case where cell voltage when the cell voltage setting value is full of less than battery, when cell voltage value of feedback reaches electricity
When cell voltage setting value, automatic voltage regulator exports the charging current for driving automatic current regulator no longer to export second stage
Instruction, and change one or more charge modes in constant pressure, constant current, floating charge in frequency converter, carry out battery charging
Control reaches cell voltage when battery is full of until cell voltage value of feedback.
8. the control method of charger as claimed in claim 2, which is characterized in that
The peripheral control unit judges that the cell voltage value of feedback that it is received is greater than duration or the electricity of cell voltage setting value
When numerical value being pressed to be more than the range of setting, peripheral control unit output drives the automatic current regulator to stop output charging current
Instruction, control battery stop charging.
9. the control method of the charger as described in any one of claim 1 ~ 8, which is characterized in that
The charger is the charger to charge to the battery of electric vehicle.
10. a kind of charger, to prevent battery overcharge, which is characterized in that be internally provided in frequency converter:
Charging circuit is electrically connected between main power source and battery to be charged；
Automatic voltage regulator controls the charging voltage of battery charging；The input of the automatic voltage regulator is believed
Number include: the cell voltage setting value provided it outside frequency converter, and actually measured electricity from charging circuit or battery
Cell voltage value of feedback；The output signal of the automatic voltage regulator is the setting charging current value as control instruction；
Automatic current regulator controls the charging current of battery charging；The input of the automatic current regulator is believed
Number include: the output signal of the automatic voltage regulator, and actually measured charging current from charging circuit or battery
Value of feedback；The output signal of the automatic current regulator is sent to the charging current of the charging circuit；
Wherein, the automatic voltage regulator is exported to the control instruction of automatic current regulator, is any one below:
The control instruction is to drive automatic current regulator when cell voltage value of feedback does not reach the first threshold of setting
Output reaches or approaches the first instruction of permitted maximum charging current；
The control instruction is driven when cell voltage value of feedback reaches first threshold without reaching cell voltage setting value
Automatic current regulator output is less than the second instruction of the charging current of maximum charging current numerical value；
The control instruction is to drive automatic current to adjust when cell voltage value of feedback meets or exceeds cell voltage setting value
Device stops the third instruction of output charging current；
It is further provided with peripheral control unit outside the frequency converter, the input signal of the peripheral control unit includes: the battery
Voltage setting value, and actually measured cell voltage value of feedback from charging circuit or battery；
When the output signal of the peripheral control unit meets or exceeds cell voltage setting value included in cell voltage value of feedback, drive
The automatic current regulator is set to stop the 4th instruction of output charging current.
11. charger as claimed in claim 10, which is characterized in that
The charger is the charger to charge to the battery of electric vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610572490.1A CN106026294B (en) | 2016-07-20 | 2016-07-20 | A kind of charger and its control method |
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| CN201610572490.1A CN106026294B (en) | 2016-07-20 | 2016-07-20 | A kind of charger and its control method |
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| CN109217429B (en) * | 2018-10-31 | 2021-04-23 | 西门子工厂自动化工程有限公司 | Method and apparatus for charge and discharge control |
| CN111162567B (en) * | 2018-11-07 | 2023-12-12 | 青岛港国际股份有限公司 | Automatic wharf AGV charging method and system |
| CN110994709B (en) * | 2019-11-07 | 2023-03-14 | 广东尚研电子科技有限公司 | Battery charging capacity control method and controller |
| CN113346580A (en) * | 2021-05-28 | 2021-09-03 | 上海广为美线电源电器有限公司 | Reverse charging control system and method for emergency starting power supply |
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|---|---|---|---|---|
| CN102170148A (en) * | 2010-02-26 | 2011-08-31 | 三洋电机株式会社 | Charging apparatus, program |
| DE102012012765A1 (en) * | 2012-06-27 | 2014-01-02 | Volkswagen Aktiengesellschaft | Method for charging battery device for electric drive system of e.g. hybrid vehicle, involves supplying predetermined charging current into battery device when cell voltages of individual cells are determined to reach final charging voltage |
| CN205811622U (en) * | 2016-07-20 | 2016-12-14 | 富士电机（中国）有限公司 | A kind of charger |
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2016
- 2016-07-20 CN CN201610572490.1A patent/CN106026294B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170148A (en) * | 2010-02-26 | 2011-08-31 | 三洋电机株式会社 | Charging apparatus, program |
| DE102012012765A1 (en) * | 2012-06-27 | 2014-01-02 | Volkswagen Aktiengesellschaft | Method for charging battery device for electric drive system of e.g. hybrid vehicle, involves supplying predetermined charging current into battery device when cell voltages of individual cells are determined to reach final charging voltage |
| CN205811622U (en) * | 2016-07-20 | 2016-12-14 | 富士电机（中国）有限公司 | A kind of charger |
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