CN109617189A - A kind of current equalizing method of charging module and machine mode - Google Patents
A kind of current equalizing method of charging module and machine mode Download PDFInfo
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- CN109617189A CN109617189A CN201910020476.4A CN201910020476A CN109617189A CN 109617189 A CN109617189 A CN 109617189A CN 201910020476 A CN201910020476 A CN 201910020476A CN 109617189 A CN109617189 A CN 109617189A
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- slave
- host
- current
- percent
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
Abstract
The invention belongs to charger technical field of control method, and in particular to the current equalizing method of a kind of charging module and machine mode.Charging system and using control method of the invention controlled when, in such a way that Framework computing obtains the output current value and maximum cut-off current percentage of each charging module including host and slave, stream, which is provided, for every charging module adjusts reference, the cut-off current I that slave is calculated according to this modeFromSo that slave utilizes its own resource to the greatest extent in its current-limit mode allowed band, reduce the disturbance to the host in potentiostatic mode, and then effectively reduce the fluctuation of system output voltage, the robustness of enhancing system, can be directly in parallel by the charging module of identical voltage range different capacity grade using the mode of this percentage, there is good practical value.
Description
Technical field
The invention belongs to charger technical field of control method, and in particular to the stream side of a kind of charging module and machine mode
Method.
Background technique
Flow basic principle: in the system for flowing mode using one master and multiple slaves, the machine of the N platform module according to composition system
Number distinguish host and slave.Slave output voltage after determining satisfaction stream condition pulls up centainly again on the basis of setting value
The average current X that numerical value and cut-off current are set to Framework computing and issue, the meeting of doing so is so that the module of slave works in limit
Stream mode, and host will be operate in potentiostatic mode its export electric current be remaining electric current, size is also X；
Charging module increases constant power output section at present, and after increase and opportunity is to equal flow problem:
There are interaction relations for output voltage and cut-off current behind charging module increase invariable power section, when output voltage variation
Output current limiting value can also change, and be difficult to coordinate between slave, so occur stream during not on problem.
Summary of the invention
The present invention provides the equal of a kind of charging module and machine mode to solve above-mentioned problems of the prior art
Stream method, experiment effect is good, is handled using the processing mode that percentage is calculated, and realizes that charger module limits power
When stream.
The specific technical solution that the present invention uses is:
The current equalizing method of a kind of charging module and machine mode including composition charging system and works in the host of potentiostatic mode
And the slave of current-limit mode is worked in, the charging system uses method control as follows,
Step 1:
Each slave is with TFromFor the period, respective maximum cut-off current and respective output current value are sent to communication bus；
Step 2:
Host receives by communication bus and calculates the sum of each slave and the maximum cut-off current of this host MAX1, calculating cycle
For TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX1 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag1；
Host receives by communication bus and calculates the sum of each slave and the output current value of this host MAX2, calculating cycle
For TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX2 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag2；
If flag1 and flag2 set simultaneously, host carries out percentage and calculates to obtain Percent=(MAX2/MAX1), will count
Obtained Percent is sent to communication bus, while clear flag bit flag1 and flag2.
After step 3:Percent is generated, slave receives the Percent on communication bus,
Slave calculating current output valve IFromThe maximum cut-off current of=Percent* slave, and accordingly by the output electricity of slave
Flow valuve is set as IFrom, realize that the stream of slave is adjusted；
The current output value I of host at this timeIt is main=(the current output value I of all slaves of the sum of output current value MAX2-FromIt
With).
In step 2, after Percent is calculated, host, which is set, sends flag bit flag3, sends communication for Percent frame
Bus；
In step 3, the Percent frame that slave receiving host issues, then slave carries out current output value IFromCalculating and set
It is fixed, on the contrary it is failure to actuate.
In step 2, if Percent < 1, Percent is sent communication bus by host；
If Percent >=1, host forces Percent to be equal to 1, then sends communication bus for Percent.
The beneficial effects of the present invention are:
Charging system and using control method of the invention controlled when, by Framework computing obtain including host and from
The mode of the output current value of each charging module including machine and maximum cut-off current percentage, provides for every charging module
Stream adjusts reference, the current output value I that slave is calculated according to this modeFrom, so that slave is in its current-limit mode allowed band
Its own resource is inside utilized to the greatest extent, reduces the disturbance to the host in potentiostatic mode, and then it is defeated to effectively reduce system
The fluctuation of voltage out enhances the robustness of system, can be by identical voltage range different capacity using the mode of this percentage
The charging module of grade is directly in parallel, has good practical value.
Detailed description of the invention
Fig. 1 is the flow diagram of control method of the present invention；
Specific embodiment
With reference to the accompanying drawing and specific embodiment the invention will be further described:
Specific embodiment 1, as shown in Figure 1,
The present invention is the current equalizing method of a kind of charging module and machine mode, including forms charging system and work in pressure stabilizing mould
The host of formula and the slave for working in current-limit mode, the charging system use method control as follows,
Step 1:
Each slave is with TFromFor the period, respective maximum cut-off current and respective output current value are sent to communication bus；
Step 2:
Host receives by communication bus and calculates the sum of each slave and the maximum cut-off current of this host MAX1, calculating cycle
For TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX1 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag1；
Host receives by communication bus and calculates the sum of each slave and the output current value of this host MAX2, calculating cycle
For TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX2 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag2；
If flag1 and flag2 set simultaneously, host carries out percentage and calculates to obtain Percent=(MAX2/MAX1), will count
Obtained Percent is sent to communication bus, while clear flag bit flag1 and flag2.
After step 3:Percent is generated, slave receives the Percent on communication bus,
Slave calculating current output valve IFromThe maximum cut-off current of=Percent* slave, and accordingly by the output electricity of slave
Flow valuve is set as IFrom, realize that the stream of slave is adjusted；
The current output value I of host at this timeIt is main=(the current output value I of all slaves of the sum of output current value MAX2-FromIt
With).
As shown in Figure 1, control method of the invention includes slave process flow and host process process, slave is with TFrom=
500ms is the data output for carrying out the machine maximum cut-off current, output current value the period, and host is with TIt is main=3s is the period to receive and count
Calculate a length of T when thisIt is mainPeriod in the slave data that receive and the maximum cut-off current that this host Yu its each slave is calculated
The sum of the sum of MAX1 and output current value MAX2, and MAX1 and MAX2 is repeating to receive the data that identical slave sends
When, then it allows MAX1 or MAX2 to subtract the data that this slave last time sends, and add this newest data, is equivalent to refreshing number
According to the data of MAX1 and MAX2 are in TIt is mainIt is updated in period as slave issues the continuous renewal of data, works as TIt is mainMoment then,
MAX1 and MAX2 a length of T when being respectively thisIt is mainPeriod in the maximum cut-off current of each slave and this host, output current value it is newest
The sum of data, using TIt is mainThe effect that precision adjusting is sampled to the module parameter of variation is played, for the period in order to next week
The sharing control of phase slave.
For example: there are 3 charging modules, modules A is host, and module B, module C are slave, and output current value is
5A, maximum cut-off current are 10A, total to export electric current 15A, at this time Percent=(5A+5A+5A)/(10A+10A+10A)=
0.5,
If certain TIt is mainPeriod has the maximum cut-off current of module C because invariable power is revised as 4A, and modules A is to guarantee that total current is constant to hold
The electric current having more is carried on a shoulder pole, electric current output modifications are 6A, this TIt is mainPercentage Percent=(6A+5A+ is calculated in cycle module A
4A)/(10A+10A+4A)=15/24.After module B, module C as slave receive Percent, module B output is adjusted to
10A* (15/24)=6.25A, module C output are adjusted to 4A* (15/24)=2.5A, and the modules A in constant voltage mode exports
It is adjusted to 10A* (15/24)=6.25A, i.e., the host current output value being calculated by percent wise is held with host needs
The residual current of load is equal, is 6.25A, therefore the percentage calculation tunable slave resource that this method uses,
Under the premise of guaranteeing safe handling, so that overall system resources, using maximizing, always exporting electric current in the present embodiment is still
15A, the output current value of each module are no more than respectively maximum cut-off current, and output voltage is without fluctuation, although modules current limliting
Value is different, but the load of modules is not transfinited, and utmostly carries out electric current output using every module, guarantees that system is equal
Stream is normal.It therefore can be by the charging module of identical voltage range different capacity grade directly simultaneously using the mode of this percentage
Connection has good practical value.
This control method is led to by the sum of the sum of maximum cut-off current of all modules in computing system and output current value
Calculating Percent is crossed, the adjusting reference of respective output parameter is provided for each module, so that the output electric current of some module occurs
When variation, other modules carry out adaptability adjusting, share the current change quantity as caused by the module jointly, guarantee to adjust
It is accurate, efficient, safety carry out.
Further, in the step 2 of control method of the present invention, after Percent is calculated, host sets transmission flag bit
Percent frame is sent communication bus by flag3；
In step 3, the Percent frame that slave receiving host issues, if flag bit flag3 is set up, slave carries out electric current
Output valve IFromCalculating and setting, otherwise be failure to actuate.
Flag bit flag3 is set by host, slave is monitored the flag bit, as shown in Figure 1, flag bit at this time
Flag3 is 0xB103, and slave determines whether current Percent frame is the control issued with oneself matched host according to this numerical value
Signal, if not mark bit value corresponding to oneself matched host, then be failure to actuate, so that can carry multiple groups on communication bus
Host and mating slave module, improve the service efficiency of communication bus, avoid the risk of slave malfunction, guarantee the peace of charging system
Full stable operation.
Specific embodiment 2, in step 2, if Percent < 1, Percent is sent communication bus by host,
If Percent >=1, host forces Percent to be equal to 1, then sends communication bus for Percent.
For example: 4 modules are flowed, and modules A is host after sequence, and module B, module C and module D are slave,
Finally stream completes every output 32A, slave module B, C, D current limliting 33A, if module D is because limiting power, output limit caused by high temperature
Rheology is 25A, and the current output value that modules A corresponds to the invariable power section upper limit is 35A, this 7A having more is put on host module A
32A+7A=39A > 35A afterwards, conventionally employed host undertake the working method of residual current, and degree of excess of host is tight in the case of this
Weight (output 39A, excess 4A), causes system output voltage decline obvious.And as under the output voltage of the charging module of host
It drops to after certain value and system can be made to move back and flow；And due to the invariable power section of charging module, the decline of output voltage is again
Meeting in voltage recovery to stream condition, is then re-started and is flowed, repeatedly, cause the length of voltage so that cut-off current becomes larger
Phase big ups and downs influence the safe handling of charging system.
Using control method of the invention, Percent=(39A+32A+32A+25A)/(35A+33A+33A+ at this moment
Percent pressure is set 1 by 25A)=128/126 > 1, host module A, and slave module B, C is defeated with maximum cut-off current 33A at this time
Out, i.e. module B/C increases 1A respectively, and host module A needs the output electric current shared to be reduced to 39A-1A-1A=37A from 39A,
Since the Percent=1 that slave is issued by host exports respective current output value according to maximum cut-off current, reduce
The degree (output 37A, excess 2A) of host excess, such system voltage will not significantly, big ups and downs, utmostly promote system
System operation stability.
Claims (3)
1. the current equalizing method of a kind of charging module and machine mode, including composition charging system and work in potentiostatic mode host and
The slave of current-limit mode is worked in, the charging system uses method control as follows, it is characterised in that:
Step 1:
Each slave is with TFromFor the period, respective maximum cut-off current and respective output current value are sent to communication bus；
Step 2:
Host receives by communication bus and calculates the sum of each slave and the maximum cut-off current of this host MAX1, calculating cycle
TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX1 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag1；
Host receives by communication bus and calculates the sum of each slave and the output current value of this host MAX2, calculating cycle
TIt is main, TIt is mainComplete T is contained at least one in periodFromPeriod, if TIt is mainHost repeats to receive the data of same slave in period, then
MAX2 subtracts a data on the slave, and along with this data of the slave, host is in TIt is mainMark is set at the end of period timing
Position flag2；
If flag1 and flag2 set simultaneously, host carries out percentage and calculates to obtain Percent=(MAX2/MAX1), will calculate
To Percent be sent to communication bus, while clear flag bit flag1 and flag2.
After step 3:Percent is generated, slave receives the Percent on communication bus,
Slave calculating current output valve IFromThe maximum cut-off current of=Percent* slave, and accordingly by the output current value of slave
It is set as IFrom, realize that the stream of slave is adjusted；
The current output value I of host at this timeIt is main=(the current output value I of all slaves of the sum of output current value MAX2-FromThe sum of).
2. the current equalizing method of a kind of charging module according to claim 1 and machine mode, it is characterised in that: in step 2, meter
After calculation obtains Percent, host, which is set, sends flag bit flag3, sends communication bus for Percent frame；
In step 3, the Percent frame that slave receiving host issues, then slave carries out current output value IFromCalculating and setting, instead
Be failure to actuate.
3. the current equalizing method of a kind of charging module according to claim 1 and machine mode, it is characterised in that: in step 2, if
Percent < 1, then Percent is sent communication bus by host；
If Percent >=1, host forces Percent to be equal to 1, then sends communication bus for Percent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910020476.4A CN109617189B (en) | 2019-01-09 | 2019-01-09 | Current equalizing method of parallel operation mode of charging modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020476.4A CN109617189B (en) | 2019-01-09 | 2019-01-09 | Current equalizing method of parallel operation mode of charging modules |
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| CN109617189B CN109617189B (en) | 2022-05-17 |
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| CN103872724A (en) * | 2012-12-11 | 2014-06-18 | 三菱重工业株式会社 | Charge control device, cell system and charge control method |
| CN104734285A (en) * | 2015-02-26 | 2015-06-24 | 张家港市华为电子有限公司 | Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel |
| CN106532812A (en) * | 2016-11-01 | 2017-03-22 | 宇龙计算机通信科技(深圳)有限公司 | Charging control circuit, charging control device and method thereof |
| CN106602641A (en) * | 2016-12-06 | 2017-04-26 | 深圳市科华恒盛科技有限公司 | Scheduling method of charging modules of charger |
| CN109274089A (en) * | 2018-11-26 | 2019-01-25 | 江苏兆能电子有限公司 | A kind of digital current-sharing method of vehicle power module |
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2019
- 2019-01-09 CN CN201910020476.4A patent/CN109617189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872724A (en) * | 2012-12-11 | 2014-06-18 | 三菱重工业株式会社 | Charge control device, cell system and charge control method |
| CN104734285A (en) * | 2015-02-26 | 2015-06-24 | 张家港市华为电子有限公司 | Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel |
| CN106532812A (en) * | 2016-11-01 | 2017-03-22 | 宇龙计算机通信科技(深圳)有限公司 | Charging control circuit, charging control device and method thereof |
| CN106602641A (en) * | 2016-12-06 | 2017-04-26 | 深圳市科华恒盛科技有限公司 | Scheduling method of charging modules of charger |
| CN109274089A (en) * | 2018-11-26 | 2019-01-25 | 江苏兆能电子有限公司 | A kind of digital current-sharing method of vehicle power module |
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