CN112564203A - Active equalization control system for realizing flexible charging and discharging of power supply - Google Patents
Active equalization control system for realizing flexible charging and discharging of power supply Download PDFInfo
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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
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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
- H02J7/0029—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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- 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
- H02J7/00306—Overdischarge protection
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Abstract
The invention discloses an active equalization control system for realizing flexible charging and discharging of a power supply, wherein each battery module is connected with BMS slave control modules in one-to-one correspondence and used for acquiring the voltage, the temperature and the equalization control of a single battery module; the BMS slave control adaptive power supply can adapt to various types of power supplies in the energy storage system, can flexibly adjust the power supply current according to the characteristics of the power supply, guarantees optimal balanced charge and discharge control under different power supply current conditions, guarantees the balanced efficiency of the system, and can reduce the balanced power supply current of the whole system and reduce the system loss to a certain extent.
Description
Technical Field
The invention belongs to the technical field of balance control of power supplies, and particularly relates to an active balance control system for flexibly charging and discharging a power supply.
Background
Energy storage battery is the most core part of an energy storage system, and the energy storage system of a MW level often is formed by thousands of lithium electricity core series-parallel connections, and the nonconformity of electricity core can be serious influence energy storage system's charge-discharge ability, and then influences economic benefits.
The prior publication No. CN111277024A, entitled active equalization control system and method for energy storage system, describes an active equalization strategy of a BMS battery management system, mainly charging a single cell with the minimum voltage in a module, and performs equalization charging on one or more cells with the lowest voltage after determining that the highest and lowest voltages in the module are greater than a threshold voltage VE. The scheme only adopts a charging strategy, does not adopt a discharging mode, and has low balancing efficiency under the condition that the voltage of a certain monomer in the module is too high. The efficiency advantage of actively balanced bi-directional operation is not exploited overall. The mode is only suitable for the power supply of the switching power supply, and the power supply of the storage battery cannot be guaranteed to avoid over-discharge.
The prior publication is CN108767949A, and the patent name is a bidirectional active equalization management system capable of using a switching power supply, which describes a primary circuit connected with a dc switching power supply, and includes a power supply voltage monitoring and equalization control unit, and the primary circuit detects power supply overvoltage through a voltage monitoring device, and can adjust the on-off and current direction of an equalized line, so that the active equalization management system can ensure normal operation in a unidirectional power supply mode of the switching power supply according to preset conditions and monitoring feedback conditions. This patent is to BMS can normally work under switching power supply condition, describes the judgement condition of its mode switch, needs hardware promptly to monitor mains voltage. The adjustment implementation strategy does not indicate, and it cannot be determined whether the equalization is operating in the better mode.
Disclosure of Invention
The invention aims to provide an active equalization control system for realizing flexible charging and discharging of a power supply, so as to solve the problems of the background art.
In order to achieve the above purpose, the specific technical solution of the active equalization control system for flexibly charging and discharging the power supply of the present invention is as follows:
the utility model provides an realize initiative equalizing control system to nimble charge-discharge of power supply, include a cluster of battery of compriseing a plurality of battery module, every the battery module all is connected with the BMS slave control module of one-to-one for gather voltage, temperature and equalizing control of single battery module, a plurality of BMS insert BMS host system through same CAN bus between the control module, be used for to the voltage of battery module, temperature data information upload BMS host system, BMS slave control module still accepts BMS host system's equalizing scheduling, a plurality of BMS slave control modules still are connected with the power supply who is used for providing the power.
Further, the method of the power supply equalization control system comprises an equalization adjustment method based on power supply voltage setting or an equalization adjustment method based on power supply current setting.
Further, the power supply source balance control system balance adjustment method based on the power supply voltage setting comprises the following steps:
s11, firstly, acquiring the average value of all the cell voltages of the battery module by the BMS slave control module, recording the average value as Vavg, and setting a discharging threshold Vd (constant positive) and a discharging threshold Vc (constant positive) of the battery module;
s12, assuming that each BMS slave control module has only one balancing channel, and each BMS slave control module acquires n voltages, comparing the acquired cell voltages to obtain the highest cell voltage Vmax and the lowest cell voltage Vmin for a single battery module, and obtaining the high voltage deviation dx-vmag and the low voltage deviation dy-Vavg-Vmin for the battery module, relative to the average voltage Vavg;
s13, judging and comparing, obtaining dx1 and dy1 for the slave control module 1, comparing dx1, dy1, Vd and Vc, and determining the following relations:
1. when dx1 is more than dy1 is more than Vd, the BMS slave control module is in a discharging state;
2. when dy1 is more than dx1 is more than Vc, the BMS slave control module is in a charging state;
3. if the conditions are not met, the slave BMS control module is in a non-charging and non-discharging state;
similarly, the charging and discharging of other BMS slave control modules are judged according to the strategy.
Further, in step S12, dx is positive, and a larger value indicates that the cell voltage of the battery module is higher than the average voltage, and when the value exceeds the discharge threshold Vd (which is always positive), the discharge operation should be performed, dx is negative, and indicates that the overall voltage of the battery module is low; dy is positive, the larger the value is, the more the cell voltage of the battery module is lower than the average voltage, when the value exceeds the discharge threshold value Vc (constant positive), the charging operation should be performed, and dy is negative, the higher the voltage of the whole battery module is.
Further, the power supply source balance control system balance adjustment method based on the power supply current setting comprises the following steps:
s21, setting the upper limit of the supply current of the battery module to Isx, setting the lower limit of the supply current of the battery module to Isy, wherein Isy can be positive or negative, and positive indicates that the supply current is required to be in a power utilization state, namely the battery module is in a charging state;
s22, I1 indicates charging and discharging current of the BMS slave modules, discharging is 1A, and when loss is not considered, the charging is 2.5A, the charging is 2.5, the non-charging and non-discharging is 0, and the sum of the power supply currents of all the BMS slave modules is
When the balance control is carried out each time, the power supply current It of all BMS slave control modules of the battery module can be obtained, and the It value changes constantly along with the balance;
s23, comparing the sum It of the obtained supply currents with the limit value, and when It is larger than Isx and the charging current executed by the module is larger than the discharging current in the set current range, performing the operation of reducing the supply current of the battery cluster; when It is less than Isy, in the set current range, the discharging current executed by the module is greater than the charging current, and the operation of increasing the supply current of the battery cluster is required; if within this range, optimal equalization control can be maintained.
Further, in step S23, when the total current It is greater than or equal to the set current Isx, the supply current needs to be reduced, and the discharge conversion operation includes the following steps:
1) reducing the charging current of a certain BMS slave module, or stopping the charging of the BMS slave module;
2) increasing the discharge current of a certain BMS slave control module, or reselecting a BMS slave control module which is not charged or discharged for discharging;
3) the BMS slave module that was previously being charged is converted into the discharging mode.
Further, in the step S23, when the total current It is less than or equal to the set current Isy, the supply current needs to be increased, and the charge conversion operation includes the following steps:
1) reducing the discharge current of a certain BMS slave module, or stopping the discharge of the BMS slave module;
2) increasing the charging current of a certain BMS slave control module, or reselecting an uncharged BMS slave control module for charging;
3) the BMS slave module that was previously discharging is converted into the charging mode.
Further, the priority of the conversion operation is decreased from 1), 2) to 3), namely, the conversion condition of 1) is judged preferentially, and after the conversion condition of 2) is judged to be met, the conversion of 3) is executed logically.
Further, the power supply is a storage battery or a switching power supply.
Compared with the prior art, the invention has the following beneficial effects:
1. when the switch power supply supplies power, the power supply can be prevented from being fed, so that the power supply works abnormally;
2. when the storage battery supplies power, the charging and discharging control can be flexibly adjusted according to the operating voltage range, and the over-discharging and process phenomena of the storage battery are avoided;
3. the BMS slave control adaptive power supply can adapt to various types of power supplies in the energy storage system, can flexibly adjust the power supply current according to the characteristics of the power supply, guarantees optimal balanced charge and discharge control under different power supply current conditions, guarantees the balanced efficiency of the system, and can reduce the balanced power supply current of the whole system and reduce the system loss to a certain extent.
Drawings
FIG. 1 is a schematic diagram of a single cluster battery system of the present invention;
FIG. 2 is a block diagram of an optimal equalization control flow of the present invention;
FIG. 3 is a block diagram of the equalization adjustment control flow based on the supply current setting of the present invention;
fig. 4 is a block diagram of an active equalization circuit model according to the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the invention, reference should be made to the following description taken in conjunction with the accompanying drawings 1-4.
As shown in fig. 1, an active equalization control system for realizing flexible charging and discharging of a power supply comprises a cluster of batteries formed by a plurality of battery modules, each battery module is connected with a BMS slave control module in one-to-one correspondence for collecting voltage, temperature and equalization control of a single battery module, the plurality of BMS slave control modules are connected to a BMS master control module through a same CAN bus for uploading voltage and temperature data information of the battery modules to the BMS master control module, the BMS slave control modules also receive equalization scheduling of the BMS master control module, the plurality of BMS slave control modules are also connected with a power supply for supplying power, the power supply is a storage battery or a switching power supply, the power supply is supplied by the storage battery, the state of the storage battery needs to be judged, and the phenomenon of overcharge or overdischarge of the storage battery needs to be prevented; and the switch power supply is used for supplying power, most of the switch power supply is supplied with power in a single direction, and the electric energy cannot be fed back. When a plurality of slave control modules perform active equalization operation together, the power supply can work in a power utilization state or a power feeding state.
The method for the power supply balance control system comprises a balance adjusting method based on power supply voltage setting or a balance adjusting method based on power supply current setting.
As shown in fig. 2, the method for adjusting the power supply balance of the power supply balance control system based on the power supply voltage setting includes the following steps:
s11, firstly, acquiring the average value of all the cell voltages of the battery module by the BMS slave control module, recording the average value as Vavg, and setting a discharging threshold Vd (constant positive) and a discharging threshold Vc (constant positive) of the battery module;
s12, assuming that each BMS slave control module has only one balancing channel, and each BMS slave control module acquires n voltages, comparing the acquired cell voltages to obtain the highest cell voltage Vmax and the lowest cell voltage Vmin for a single battery module, and obtaining the high voltage deviation dx-vmag and the low voltage deviation dy-Vavg-Vmin for the battery module, relative to the average voltage Vavg;
s13, judging and comparing, obtaining dx1 and dy1 for the slave control module 1, comparing dx1, dy1, Vd and Vc, and determining the following relations:
1. when dx1 is more than dy1 is more than Vd, the BMS slave control module is in a discharging state;
2. when dy1 is more than dx1 is more than Vc, the BMS slave control module is in a charging state;
3. if the conditions are not met, the slave BMS control module is in a non-charging and non-discharging state;
similarly, the charging and discharging of other slave BMS modules are determined according to the above strategy, and for slave BMS module 2, slave BMS module 3, and slave BMS module n, the corresponding (dx2, dy2), (dx3, dy3), (dxn, dyn) can be obtained, and for each slave module, only charging, discharging or supplement can be selected at the same time;
in step S12, dx is positive, and a larger value indicates that the cell voltage of the battery module is higher than the average voltage, and when the value exceeds a discharge threshold Vd (which is always positive), a discharge operation should be performed, dx is negative, and indicates that the overall voltage of the battery module is low; dy is positive, the larger the value is, the more the cell voltage of the battery module is lower than the average voltage, when the value exceeds the discharge threshold value Vc (constant positive), the charging operation should be performed, and dy is negative, the higher the voltage of the whole battery module is.
As shown in fig. 3, the method for adjusting the balance of the power supply balance control system based on the power supply current setting includes the following steps:
s21, setting the upper limit of the supply current of the battery module to Isx, setting the lower limit of the supply current of the battery module to Isy, wherein Isy can be positive or negative, and positive indicates that the supply current is required to be in a power utilization state, namely the battery module is in a charging state;
s22, I1 indicates charging and discharging current of the BMS slave modules, discharging is 1A, and when loss is not considered, the charging is 2.5A, the charging is 2.5, the non-charging and non-discharging is 0, and the sum of the power supply currents of all the BMS slave modules is
When the balance control is carried out each time, the power supply current It of all BMS slave control modules of the battery module can be obtained, and the It value changes constantly along with the balance;
s23, comparing the sum It of the obtained supply currents with the limit value, and when It is larger than Isx and the charging current executed by the module is larger than the discharging current in the set current range, performing the operation of reducing the supply current of the battery cluster; when It is less than Isy, in the set current range, the discharging current executed by the module is greater than the charging current, and the operation of increasing the supply current of the battery cluster is required; if within this range, optimal equalization control can be maintained.
In step S23, when the total current It is greater than or equal to the set current Isx, the supply current needs to be reduced, and the discharge conversion operation includes the following:
1) reducing the charging current of a certain BMS slave module, or stopping the charging of the BMS slave module;
2) increasing the discharge current of a certain BMS slave control module, or reselecting a BMS slave control module which is not charged or discharged for discharging;
3) the BMS slave module that was previously being charged is converted into the discharging mode.
In step S23, when the total current It is less than or equal to the set current Isy, the supply current needs to be increased, and the charge conversion operation includes the following steps:
1) reducing the discharge current of a certain BMS slave module, or stopping the discharge of the BMS slave module;
2) increasing the charging current of a certain BMS slave control module, or reselecting an uncharged BMS slave control module for charging;
3) the BMS slave module that was previously discharging is converted into the charging mode.
The priority of the conversion operation is decreased from 1), 2) to 3), namely, the conversion condition of 1) is judged preferentially, and after the conversion condition of 2) is not met, the conversion of 3) is executed logically.
As shown in fig. 4, a minimum unit equalization circuit is formed by an equalization switch power supply and a plurality of sets of equalization switches, and can implement individual charging and discharging operations on a plurality of battery cells. Wherein the equalizing switch power supply needs to obtain power supply from the outside. The one-to-many equalization circuit is called an equalization channel, that is, an equalization channel can operate n cells (n ═ 1), and generally a BMS slave acquisition module has 1 to 4 such equalization channels.
To further express the clear charge conversion condition, the following example is made.
TABLE 1
As shown in table 1 above, the battery module protects 11 BMS slave modules in total, dx and dy at a certain time are shown in table 1, Vd and Vc are both set to 20, and the balancing current is fixed at 1A.
It of the optimal balance control is-3, assuming that the set lower current limit Isy is 0 and Isx is 2; then the following conversion is performed according to the conversion priority:
sequencing according to the ascending order of dx, wherein the serial number of the BMS slave control modules is (9,1,10,2,3,8,7,5,4,11, 6);
sequencing according to dy ascending order, and the serial number of the BMS slave control module is (9,8,4,3,1,2,5,10,11,6, 7);
1) it is less than or equal to Isy, performing charge conversion operation, traversing the BMS slave module in the discharge mode from the dx ascending arrangement, wherein dx of the BMS slave module is less than 1.5Vd (30), and after finding the BMS slave module 3, the BMS slave module will execute stop discharge, and at this time, It is-2; if the condition is not satisfied, the switching continues as described above, and the BMS slave module 8 satisfies the condition that It will perform the stop of the discharging, at which point It is-1, and then there is no BMS slave module that satisfies the condition. Switching to the next judgment condition;
2) then, selecting a single battery module which is not charged and discharged, performing charging operation, and determining that the conditions are that the BMS slave control module which is not charged and discharged in the dy ascending arrangement is traversed, and dy of the BMS slave control module is greater than 0.5Vc (10), finding the BMS slave control module 3, and the BMS slave control module executes the charging operation, wherein It is 0; if It > Isy is not satisfied, the traversal is continued, and BMS slave module 1 is found to satisfy the condition, and the BMS slave module will perform the charging operation, and at this time It is 1, the condition is satisfied.
If the condition has not been met. The decision continues with the following decision logic.
3) And finally, the BMS slave modules which are discharging are switched to charging, the BMS slave modules in the discharging mode are traversed from the dx ascending arrangement, and the BMS slave modules which meet the conditions firstly are switched from the discharging mode to the charging mode. Recalculating whether It meets the requirement.
And after the judgment is finished, uniformly executing the conversion operation.
According to the above example, the charge conversion conditions are summarized as follows:
1) and traversing the BMS slave control modules which are in a discharging state and dx is less than 1.5Vd from the dx ascending sequence, selecting the BMS slave control modules which meet the conditions firstly to stop discharging, recalculating It, and continuing traversing until all the BMS slave control modules do not meet the requirements, and then switching to the next judgment logic.
2) And traversing the BMS slave control modules which are in the non-charging and non-discharging state and have dy larger than 0.5Vc from the dy ascending sequence, selecting the BMS slave control modules which meet the conditions firstly to perform charging operation, recalculating It, and continuing traversing until all the BMS slave control modules do not meet the conditions, and then switching to the next judgment logic.
3) And traversing the BMS slave control modules in the discharging state from the dx ascending sequence, selecting the BMS slave control modules meeting the conditions first to perform charging operation, and recalculating It until the setting conditions are met.
The discharge conversion conditions are summarized as follows:
1) and traversing the BMS slave control modules which are in the charging state and dy <1.5Vc from the dy ascending sequence, selecting the BMS slave control modules which meet the conditions firstly to stop charging operation, recalculating It, and continuing traversing until all the BMS slave control modules do not meet the requirements, and then switching to the next judgment logic.
2) And traversing the BMS slave control modules which are in the state of not charging and not discharging and dx is larger than 0.5Vd from the dx ascending sequence, selecting the BMS slave control modules which meet the conditions firstly to perform discharging operation, recalculating It, and continuing traversing until all the BMS slave control modules do not meet the conditions, and then switching to the next judgment logic.
3) And traversing the BMS slave control modules in the charging state from the dy ascending sequence, selecting the BMS slave control modules meeting the conditions first to perform discharging operation, and recalculating It until the set conditions are met.
The invention provides the optimal active balance control of the battery module aiming at the power supply requirements of different power supplies, and adjusts the optimal balance control through condition logic setting, so that the power supply current of the battery system works in a set range, the balanced power supply current of the whole system can be reduced to a certain extent, and the system loss is reduced.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. The utility model provides a realization is to nimble balanced control system who charges and discharges of power supply, includes a cluster of battery that comprises a plurality of battery module, its characterized in that: every the battery module all is connected with the BMS slave control module of one-to-one for gather voltage, temperature and the balanced control of single battery module, insert BMS host system through same CAN bus between the plurality of BMS slave control modules for upload battery module's voltage, temperature data information to BMS host system, BMS slave control module still accepts BMS host system's balanced dispatch, and a plurality of BMS slave control modules still are connected with the power supply who is used for providing electric energy.
2. The active equalization control system for realizing flexible charging and discharging of a power supply according to claim 1, wherein the method of the power supply equalization control system comprises an equalization adjustment method based on power supply voltage setting or an equalization adjustment method based on power supply current setting.
3. The active equalization control system for realizing flexible charging and discharging of a power supply according to claim 2, wherein the equalization adjustment method of the power supply equalization control system based on the power supply voltage setting comprises the following steps:
s11, firstly, acquiring the average value of all the cell voltages of the battery module by the BMS slave control module, recording the average value as Vavg, and setting a discharging threshold Vd (constant positive) and a discharging threshold Vc (constant positive) of the battery module;
s12, assuming that each BMS slave control module has only one balancing channel, and each BMS slave control module acquires n voltages, comparing the acquired cell voltages to obtain the highest cell voltage Vmax and the lowest cell voltage Vmin for a single battery module, and obtaining the high voltage deviation dx-vmag and the low voltage deviation dy-Vavg-Vmin for the battery module, relative to the average voltage Vavg;
s13, judging and comparing, obtaining dx1 and dy1 for the slave control module 1, comparing dx1, dy1, Vd and Vc, and determining the following relations:
1. when dx1 is more than dy1 is more than Vd, the BMS slave control module is in a discharging state;
2. when dy1 is more than dx1 is more than Vc, the BMS slave control module is in a charging state;
3. if the conditions are not met, the slave BMS control module is in a non-charging and non-discharging state;
similarly, the charging and discharging of other BMS slave control modules are judged according to the strategy.
4. The active equalization control system for realizing flexible charging and discharging of a power supply according to claim 3, wherein dx is positive in step S12, and the larger the value is, the more the cell voltage of the battery module is higher than the average voltage is, when the value exceeds a discharging threshold Vd (which is always positive), a discharging operation should be performed, and dx is negative, the lower the voltage of the whole battery module is; dy is positive, the larger the value is, the more the cell voltage of the battery module is lower than the average voltage, when the value exceeds the discharge threshold value Vc (constant positive), the charging operation should be performed, and dy is negative, the higher the voltage of the whole battery module is.
5. The active equalization control system for realizing flexible charging and discharging of a power supply according to claim 3, wherein the equalization adjustment method of the power supply equalization control system based on the power supply current setting comprises the following steps:
s21, setting the upper limit of the supply current of the battery module to Isx, setting the lower limit of the supply current of the battery module to Isy, wherein Isy can be positive or negative, and positive indicates that the supply current is required to be in a power utilization state, namely the battery module is in a charging state;
s22, I1 indicates charging and discharging current of the BMS slave modules, discharging is 1A, and when loss is not considered, the charging is 2.5A, the charging is 2.5, the non-charging and non-discharging is 0, and the sum of the power supply currents of all the BMS slave modules is
When the balance control is carried out each time, the power supply current It of all BMS slave control modules of the battery module can be obtained, and the It value changes constantly along with the balance;
s23, comparing the sum It of the obtained supply currents with the limit value, and when It is larger than Isx and the charging current executed by the module is larger than the discharging current in the set current range, performing the operation of reducing the supply current of the battery cluster; when It is less than Isy, in the set current range, the discharging current executed by the module is greater than the charging current, and the operation of increasing the supply current of the battery cluster is required; if within this range, optimal equalization control can be maintained.
6. The active equalization control system for flexibly charging and discharging a power supply according to claim 5, wherein in step S23, when the total current It is greater than or equal to the set current Isx, the power supply current needs to be decreased, and the discharging switching operation includes the following steps:
1) reducing the charging current of a certain BMS slave module, or stopping the charging of the BMS slave module;
2) increasing the discharge current of a certain BMS slave control module, or reselecting a BMS slave control module which is not charged or discharged for discharging;
3) the BMS slave module that was previously being charged is converted into the discharging mode.
7. The active equalization control system for providing flexible charging and discharging of power supply according to claim 5, wherein in step S23, when the total current It is less than or equal to the set current Isy, the power supply current needs to be increased, and the charge conversion operation includes the following steps:
1) reducing the discharge current of a certain BMS slave module, or stopping the discharge of the BMS slave module;
2) increasing the charging current of a certain BMS slave control module, or reselecting an uncharged BMS slave control module for charging;
3) the BMS slave module that was previously discharging is converted into the charging mode.
8. The active equalization control system for realizing flexible charging and discharging of a power supply according to claim 6 or 7, characterized in that the priority of the conversion operation is decreased from 1), 2) to 3), i.e. the conversion condition of 1) is judged preferentially, and after the conversion condition of 2) is not met, the conversion of 3) is executed logically.
9. The active equalization control system for achieving flexible charging and discharging of a power supply according to claim 1, wherein the power supply is a storage battery or a switching power supply.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466721A (en) * | 2021-08-31 | 2021-10-01 | 蜂巢能源科技有限公司 | Failure identification method and device for lithium ion battery, electronic equipment and medium |
| CN113555939A (en) * | 2021-07-28 | 2021-10-26 | 深圳市超思维电子股份有限公司 | Distributed BMS battery active equalization management system |
| CN113964913A (en) * | 2021-11-05 | 2022-01-21 | 许继集团有限公司 | Self-adaptive voltage compensation sampling method and system |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555939A (en) * | 2021-07-28 | 2021-10-26 | 深圳市超思维电子股份有限公司 | Distributed BMS battery active equalization management system |
| CN113466721A (en) * | 2021-08-31 | 2021-10-01 | 蜂巢能源科技有限公司 | Failure identification method and device for lithium ion battery, electronic equipment and medium |
| CN113964913A (en) * | 2021-11-05 | 2022-01-21 | 许继集团有限公司 | Self-adaptive voltage compensation sampling method and system |
| CN113964913B (en) * | 2021-11-05 | 2024-06-07 | 许继集团有限公司 | Self-adaptive voltage compensation sampling method and system |
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