CN106816934A - Voltage control method, device and system - Google Patents
Voltage control method, device and system Download PDFInfo
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- CN106816934A CN106816934A CN201710166420.0A CN201710166420A CN106816934A CN 106816934 A CN106816934 A CN 106816934A CN 201710166420 A CN201710166420 A CN 201710166420A CN 106816934 A CN106816934 A CN 106816934A
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention relates to a kind of voltage control method, apparatus and system, methods described includes：Gather the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems in parallel；Contrast obtains the maximum in the terminal voltage；Judge whether the absolute value of the difference between the terminal voltage of the battery modules of each energy-storage system and the maximum is more than pre-set threshold value successively；If being more than, the battery modules of control inverter connection correspondence energy-storage system are charged；Whether the terminal voltage of the battery modules of the detection correspondence energy-storage system reaches the maximum；If reaching, stop charging.The present invention can be such that the terminal voltage of the battery modules of each energy-storage system is consistent, and energy-storage system can then avoid dough nut effect when in parallel.
Description
Technical field
The present invention relates to energy storage control field, more particularly to a kind of voltage control method, device and system.
Background technology
As new energy is in high speed development in recent years, energy storage field has obtained the attention of countries in the world, either large-scale
Container energy-storage system or household small-size energy-storage system are obtained for significant progress.Energy-storage system is generally battery modules storage
The form of energy, battery modules mix a set of BMS (BATTERY MANAGEMENT SYSTEM, battery management system) system, insurance
The equipment such as device, relay are regarded as an energy-storage system.
When mounted, an energy-storage system is not only needed to due to client, it may be desirable to which two even more than energy storage system
System is in parallel to increase stored energy capacitance value, but due to the difference of the differentiation of battery core and time for competiton in battery modules, may make
Voltage into several energy-storage systems is inconsistent, if now directly that several energy-storage systems are used in parallel, due to the internal resistance of cell and leads
Line internal resistance is smaller, may cause the circulation of electric current, causes high voltage energy-storage system to charge low-voltage energy-storage system, causes electricity
Can waste, and if charging current is excessive, then can cause the damage of BMS systems.
Therefore, voltage of the energy-storage system in parallel connection is needed unanimously, to reduce the dough nut effect of electric current.
The content of the invention
Based on this, it is necessary to for energy-storage system in parallel connection the inconsistent problem of voltage, there is provided a kind of voltage controlling party
Method, device and system.
A kind of voltage control method, methods described includes：
Gather the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems in parallel；
Contrast obtains the maximum in the terminal voltage；
Judging the absolute value of the difference between the terminal voltage of the battery modules of each energy-storage system and the maximum successively is
It is no more than pre-set threshold value；
If being more than, the battery modules of control inverter connection correspondence energy-storage system are charged；
Whether the terminal voltage of the battery modules of the detection correspondence energy-storage system reaches the maximum；
If reaching, stop charging.
Wherein in one embodiment, methods described also includes：
Detect whether the absolute value of difference between the terminal voltage of the battery modules of each energy-storage system and the maximum is equal
Less than pre-set threshold value；
If being less than, the internal relay of adhesive each energy-storage system.
Wherein in one embodiment, the terminal voltage of the battery modules for judging each energy-storage system successively with it is described most
Whether the absolute value of the difference between big value includes more than pre-set threshold value：
Contrast obtains the minimum value in the terminal voltage；
Judge whether the absolute value of the difference between the minimum value and the maximum is more than pre-set threshold value.
Wherein in one embodiment, the battery modules of the control inverter connection correspondence energy-storage system carry out charging bag
Include：
Charge command is sent to the inverter by RS485 or CAN communication agreement；
The battery modules of the inverter connection correspondence energy-storage system are controlled to be charged.
Wherein in one embodiment, charge cutoff voltage, the charge cutoff voltage are included in the charge command
It is the maximum in the terminal voltage.
Wherein in one embodiment, the battery modules of the control inverter connection correspondence energy-storage system charge also
Including：
Disconnect the relay in the energy-storage system in addition to the correspondence energy-storage system.
A kind of voltage-operated device, the voltage-operated device includes input both positive and negative polarity, output positive and negative charge, control mould
Block, communication output mouth and N number of communication input mouthful；
Both positive and negative polarity of the input both positive and negative polarity respectively with N number of energy-storage system is connected；
The output positive and negative charge is connected with the both positive and negative polarity of inverter；
The communication output mouthful is connected with the COM1 of the inverter；
N number of communication input mouth is connected respectively the COM1 of N number of energy-storage system；
The control module is provided with voltage control routine, and the control module is held by performing the voltage control routine
Row the process described above.
Wherein in one embodiment, the communication output mouthful is RJ45 interfaces with communication input mouthful.
A kind of voltage control system, including inverter and N number of energy-storage system, also including respectively with the inverter and N number of
The voltage-operated device as described above of energy-storage system connection.
The above voltage control method, device and in some energy-storage systems of system acquisition each energy-storage system battery mould
The terminal voltage of group, therefrom determining maximum, then judges the terminal voltage and maximum of the battery modules of each energy-storage system successively
Between the absolute value of difference whether be more than pre-set threshold value, if being more than, the battery modules of the energy-storage system charge until
The terminal voltage of the battery modules of the energy-storage system reaches maximum, and thus, the terminal voltage of the battery modules of each energy-storage system is equal
It is consistent, energy-storage system can then avoid dough nut effect when in parallel.
Brief description of the drawings
Fig. 1 is the flow chart of the pressure control method of embodiment electricity；
Fig. 2 is the flow chart of the voltage control method of another embodiment；
Fig. 3 is the annexation figure of the voltage-operated device of an embodiment.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, the voltage control method of an embodiment includes step S110 to step S160.
Step S110, gathers the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems in parallel.
For N number of energy-storage system in parallel, each can be gathered by the positive pole and negative pole that connect each energy-storage system and stored up
The terminal voltage of battery modules in energy system.
Step S120, contrast obtains the maximum in terminal voltage.
For N number of energy-storage system, the terminal voltage of collection is N number of, can determine maximum from N number of terminal voltage.
Step S130, judges the absolute of difference between the terminal voltage and maximum of the battery modules of each energy-storage system successively
Whether value is more than pre-set threshold value.
Pre-set threshold value could be arranged to 1V or other numerical value, and the determination of specific data can be set according to concrete application
Put.The numerical value needs to meet the absolute value when the difference of the terminal voltage of battery modules and maximum in each energy-storage system in default valve
When in value, dough nut effect will not be produced.To prevent dough nut effect, the end of the battery modules of each energy-storage system can be successively judged
Whether the absolute value of the difference between voltage and maximum is more than pre-set threshold value.But, judge to judge to repeat successively.Cause
This, step S130 includes step S131 and step S132.
Step S131, contrast obtains the minimum value in terminal voltage；
Step S132, judges whether the absolute value of the difference between minimum value and maximum is more than pre-set threshold value.
When judging successively, the corresponding energy-storage system of minimum value in terminal voltage can be selected, when the corresponding energy storage of minimum value
When the absolute value of the difference between the terminal voltage and maximum of the battery modules of system is less than pre-set threshold value, then need not further sentence
It is disconnected, thus can avoid repeating to judge.
Step S140, if being more than, the battery modules of control inverter connection correspondence energy-storage system are charged.
Wherein it is possible to pass through RS485 or CAN communication agreement sends charge command to inverter, so as to control inverter
The battery modules of connection correspondence energy-storage system are charged.Include charge cutoff voltage, charge cutoff voltage in charge command
It is the maximum in terminal voltage.The battery modules of inverter connection correspondence energy-storage system remove correspondence when being charged, it is necessary to disconnect
The relay in energy-storage system outside energy-storage system.Now, the energy-storage system that inverter can only be single to this charges.
Whether step S150, the terminal voltage of the battery modules of detection correspondence energy-storage system reaches maximum.
, it is necessary to detect whether the terminal voltage of battery modules reaches maximum in charging process, to avoid dough nut effect, should
The terminal voltage of battery modules cannot be greater than the maximum for allowing.
Step S160, if reaching, stops charging.
When the terminal voltage of the battery modules reaches maximum, control inverter stops charging.
The above voltage control method gathers the end of the battery modules of each energy-storage system in some energy-storage systems first
Then voltage, therefrom determining maximum judges between the terminal voltage and maximum of the battery modules of each energy-storage system successively
Whether poor absolute value is more than pre-set threshold value, if being more than, the battery modules to the energy-storage system charge until the energy storage
The terminal voltage of the battery modules of system reaches maximum, and thus, the terminal voltage of the battery modules of each energy-storage system keeps one
Cause, energy-storage system can then avoid dough nut effect when in parallel.
As shown in Fig. 2 the voltage control method of another embodiment also includes step S170 and step S180.
Step S170, detecting the absolute value of the difference between the terminal voltage and maximum of the battery modules of each energy-storage system is
It is no to be respectively less than pre-set threshold value；
Step S180, if being less than, the internal relay of adhesive each energy-storage system.
When whether the absolute value of the difference in each energy-storage system between the terminal voltage and maximum of battery modules is respectively less than in advance
If during threshold values, then with the internal relay of each energy-storage system of adhesive energy-storage system can be made in parallel, and circulation effect will not be formed
Should.
As shown in figure 3, the voltage-operated device of an embodiment includes input both positive and negative polarity, output positive and negative charge, control mould
Block, communication output mouth and N number of communication input mouthful；
Both positive and negative polarity of the input both positive and negative polarity respectively with N number of energy-storage system is connected；
Output positive and negative charge is connected with the both positive and negative polarity of inverter；
Communication output mouthful is connected with the COM1 of inverter；
N number of communication input mouth is connected respectively the COM1 of N number of energy-storage system；
Control module is provided with voltage control routine, and control module is above-described by performing voltage control routine execution
Method.
The above voltage-operated device gathers the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems,
Therefrom determining maximum, then judges the exhausted of difference between the terminal voltage and maximum of the battery modules of each energy-storage system successively
Whether pre-set threshold value is more than to value, if being more than, the battery modules to the energy-storage system charge up to the energy-storage system
The terminal voltage of battery modules reaches maximum, and thus, the terminal voltage of the battery modules of each energy-storage system is consistent, energy storage
System can then avoid dough nut effect when in parallel.
When control module performs the process described above by performing voltage control routine, N number of energy-storage system is gathered first
The terminal voltage of middle battery modules, and the maximum obtained in terminal voltage is contrasted, the battery modules of each energy-storage system are judged successively
Terminal voltage and maximum between difference absolute value whether be more than pre-set threshold value, if being more than, to inverter send charge command
And control the battery modules that inverter connects correspondence energy-storage system to be charged, the battery of control module detection correspondence energy-storage system
Whether the terminal voltage of module reaches maximum, if reaching, stops charging.
Control module can send charge command by RS485 or CAN communication agreement to inverter, so as to control inversion
The battery modules of device connection correspondence energy-storage system are charged.Include charge cutoff voltage, charge cutoff electricity in charge command
It is the maximum in terminal voltage to press.The battery modules of inverter connection correspondence energy-storage system are when being charged, it is necessary to disconnect except right
Answer the relay in the energy-storage system outside energy-storage system.Now, the energy-storage system that inverter can only be single to this charges.
Pre-set threshold value could be arranged to 1V or other numerical value, and the determination of specific data can be set according to concrete application
Put.The numerical value needs to meet the absolute value when the difference of the terminal voltage of battery modules and maximum in each energy-storage system in default valve
When in value, dough nut effect will not be produced.To prevent dough nut effect, the end of the battery modules of each energy-storage system can be successively judged
Whether the absolute value of the difference between voltage and maximum is more than pre-set threshold value.But, judge to judge to repeat successively.For
This, control module judge successively the difference between the terminal voltage and maximum of the battery modules of each energy-storage system absolute value whether
During more than pre-set threshold value, the corresponding energy-storage system of minimum value in terminal voltage can be successively selected, when the corresponding energy storage of minimum value
When the absolute value of the difference between the terminal voltage and maximum of the battery modules of system is less than pre-set threshold value, then need not further sentence
It is disconnected, thus can avoid repeating to judge.
In charging process, control module needs whether the terminal voltage for detecting battery modules reaches maximum, to avoid ring
Stream effect, the terminal voltage of the battery modules cannot be greater than the maximum for allowing.When the terminal voltage of the battery modules reaches maximum
When, control inverter stops charging.
As shown in Figure 3, communication output mouthful and communication input mouthful are RJ45 interfaces.
The present embodiment additionally provides a kind of voltage control system, including inverter and N number of energy-storage system, also including respectively with
Inverter and the voltage-operated device as described above of N number of energy-storage system connection.
The above voltage control system gathers the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems,
Therefrom determining maximum, then judges the exhausted of difference between the terminal voltage and maximum of the battery modules of each energy-storage system successively
Whether pre-set threshold value is more than to value, if being more than, the battery modules to the energy-storage system charge up to the energy-storage system
The terminal voltage of battery modules reaches maximum, and thus, the terminal voltage of the battery modules of each energy-storage system is consistent, energy storage
System can then avoid dough nut effect when in parallel.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of voltage control method, it is characterised in that methods described includes：
Gather the terminal voltage of the battery modules of each energy-storage system in some energy-storage systems in parallel；
Contrast obtains the maximum in the terminal voltage；
Judge whether the absolute value of difference between the terminal voltage of the battery modules of each energy-storage system and the maximum is big successively
In pre-set threshold value；
If being more than, the battery modules of control inverter connection correspondence energy-storage system are charged；
Whether the terminal voltage of the battery modules of the detection correspondence energy-storage system reaches the maximum；
If reaching, stop charging.
2. method according to claim 1, it is characterised in that methods described also includes：
Detect whether the absolute value of the difference between the terminal voltage of the battery modules of each energy-storage system and the maximum is respectively less than
Pre-set threshold value；
If being less than, the internal relay of adhesive each energy-storage system.
3. method according to claim 1, it is characterised in that the battery modules for judging each energy-storage system successively
Whether the absolute value of the difference between terminal voltage and the maximum includes more than pre-set threshold value：
Contrast obtains the minimum value in the terminal voltage；
Judge whether the absolute value of the difference between the minimum value and the maximum is more than pre-set threshold value.
4. the method according to claim any one of 1-3, it is characterised in that the control inverter connection correspondence energy storage
The battery modules of system carry out charging to be included：
Charge command is sent to the inverter by RS485 or CAN communication agreement；
The battery modules of the inverter connection correspondence energy-storage system are controlled to be charged.
5. method according to claim 4, it is characterised in that include charge cutoff voltage, institute in the charge command
It is the maximum in the terminal voltage to state charge cutoff voltage.
6. the method according to right 4, it is characterised in that the battery modules of the control inverter connection correspondence energy-storage system
Charged and also include：
Disconnect the relay in the energy-storage system in addition to the correspondence energy-storage system.
7. a kind of voltage-operated device, it is characterised in that the voltage-operated device includes that input both positive and negative polarity, output end are positive and negative
Pole, control module, communication output mouthful and N number of communication input mouthful；
Both positive and negative polarity of the input both positive and negative polarity respectively with N number of energy-storage system is connected；
The output positive and negative charge is connected with the both positive and negative polarity of inverter；
The communication output mouthful is connected with the COM1 of the inverter；
N number of communication input mouth is connected respectively the COM1 of N number of energy-storage system；
The control module is provided with voltage control routine, and the control module is by performing the voltage control routine right of execution
Profit requires the method described in any one of 1-6.
8. voltage-operated device according to claim 7, it is characterised in that the communication output mouthful and communication input
Mouth is RJ45 interfaces.
9. a kind of voltage control system, including inverter and N number of energy-storage system, it is characterised in that also including inverse with described respectively
Become the voltage-operated device as claimed in claim 7 or 8 of device and the connection of N number of energy-storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710166420.0A CN106816934A (en) | 2017-03-20 | 2017-03-20 | Voltage control method, device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710166420.0A CN106816934A (en) | 2017-03-20 | 2017-03-20 | Voltage control method, device and system |
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| CN106816934A true CN106816934A (en) | 2017-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109301942A (en) * | 2018-10-31 | 2019-02-01 | 东莞市新瑞能源技术有限公司 | A kind of battery container intelligent energy storage system and its workflow |
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| CN104167770A (en) * | 2013-07-19 | 2014-11-26 | 郑州宇通客车股份有限公司 | Battery group discharging control method and battery group charging control method |
| US20160099585A1 (en) * | 2014-10-06 | 2016-04-07 | Samsung Sdi Co., Ltd. | Battery pack and driving method thereof |
| CN106469930A (en) * | 2015-08-20 | 2017-03-01 | 三星Sdi株式会社 | Battery system |
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