CN113746172B - Battery management system with multiple BMS modules connected in parallel - Google Patents
Battery management system with multiple BMS modules connected in parallel Download PDFInfo
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- CN113746172B CN113746172B CN202111051707.1A CN202111051707A CN113746172B CN 113746172 B CN113746172 B CN 113746172B CN 202111051707 A CN202111051707 A CN 202111051707A CN 113746172 B CN113746172 B CN 113746172B
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
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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
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery management system with a plurality of BMS modules connected in parallel, which can generate a primary supplementary signal when a certain condition is met by acquiring the electricity storage amount, automatically isolate the BMS module corresponding to Lj and two adjacent BMS modules at the moment to form an independent parallel group, charge and discharge the parallel group, stop isolation when the performance difference is less than or equal to X1, and re-integrate into an integral audience module; when any second dangerous condition exists, an alarm signal is automatically started, the BMS module with low electricity storage is isolated independently, the backup module is transferred to charge the BMS module until the conditions are met, and the BMS module is merged again; the battery pack management method and the battery pack management system can provide a better available parallel BMS module battery pack management scheme, and ensure enough safety; the invention is simple, effective and easy to use.
Description
Technical Field
The invention belongs to the field of parallel connection of multiple BMSs, relates to a battery power utilization management technology, and particularly relates to a battery management system with a plurality of BMS modules connected in parallel.
Background
Patent publication No. CN106532800A discloses a method for implementing a battery management system with multiple BMS modules connected in parallel, comprising the steps of: s1, connecting the BMS modules in parallel, setting any one of the BMS modules as a main module and the rest BMS modules as sub-modules; and S2, the sub-modules send the module data to the main module, and the main module receives the data of each sub-module and processes the module data and the data of the sub-modules. According to the method for realizing the battery management system with the plurality of BMS modules connected in parallel, the plurality of BMS modules are provided with the main module and the sub-modules, the labor division of each BMS module is clear, the use efficiency of the battery management system is improved, and the reliability of the battery management system is improved. Meanwhile, the main module also monitors the data acquisition condition of each BMS module in real time, and if data or information is missing, the main module can immediately control and stop the work of each BMS module, so that the safety of the battery management system is improved.
However, when a plurality of BMS modules are connected in parallel, the potential safety hazard problem caused by mutual charging and discharging among a plurality of battery packs is not solved, and a solution is provided based on the potential safety hazard problem.
Disclosure of Invention
The present invention is directed to a battery management system in which a plurality of BMS modules are connected in parallel.
The purpose of the invention can be realized by the following technical scheme:
a battery management system with a plurality of BMS modules connected in parallel comprises a strategy pre-evaluation unit, a processor, a BMS control group and a state synchronization unit;
the strategy pre-evaluation unit is used for returning the strategy quantity to the processor, the processor receives the strategy quantity and then automatically combines the partition unit, the BMS control group and the state synchronization unit to perform power utilization follow-up control, and the power utilization follow-up control specifically comprises the following steps:
the method comprises the following steps: acquiring the corresponding strategy quantity;
step two: calling the BMS modules calling the corresponding strategy number in the BMS control group for power supply, and separating the rest BMS modules by virtue of the separation units;
step three: then, the BMS modules corresponding to the strategy quantity are marked as audience modules;
step four: calling a partitioned BMS module, and marking the partitioned BMS module as a backup module;
step five: starting an audience module to charge the audience objects, acquiring the electricity storage of all the audience modules in real time in the charging process, and marking the electricity storage as Lj, j being 1, 1. Here Lj are sequentially marked in the order in which the respective BMS modules are connected in parallel;
step six: acquiring a danger range and an early warning value;
step seven: acquiring a power utilization stock Lj, wherein when | Lj-Lj-1|, j is 2,. When the performance difference value is less than or equal to X1, the isolation is stopped and the whole audience module is merged again; the X1 value is a preset value for a manager;
when any value | Lj-Lj-1| is in a dangerous range, an alarm signal is automatically started, a BMS module with low electricity storage is isolated independently, and a backup module is called to charge the BMS module until the value | Lj-Lj-1| is less than an early warning value-5X 1;
step eight: and continuously monitoring in the seventh step.
Further, the danger range and the early warning value in the step six are obtained specifically by the following method:
acquiring accidents caused by mutual charging and discharging of a plurality of BMS modules recently, and regarding the conditions of damage to the battery pack, fire and the like as the accidents;
acquiring specific values of performance differences among BMS modules in each accident and marking the specific values as performance differences;
carrying out average value calculation on the performance difference value, marking the value as a target value, then obtaining the minimum value of the performance difference value, and marking the minimum value as a threshold value; multiplying the threshold value by a preset coefficient to obtain an early warning value, wherein the preset coefficient is obtained by multiple experiments and deduction through a reverse result; the preset value is a numerical value preset by a manager;
marking the range from the threshold value to the target value as a danger range;
and obtaining a danger range and an early warning value.
Further, the processor is also used for transmitting the alarm signal to the reminding unit, and the reminding unit automatically informs the manager of the occurrence of the abnormal condition.
The battery pack control system further comprises a BMS control group, wherein the BMS control group is formed by connecting a plurality of BMS modules in parallel and mainly controls the battery pack formed by the batteries of the corresponding BMS modules;
the system comprises a scene acquisition unit and a pre-evaluation unit, wherein the scene acquisition unit is used for acquiring the power consumption requirements of audience objects, and the power consumption requirements specifically comprise power consumption scenes; the scene acquisition unit is used for transmitting the power utilization scene to the pre-evaluation unit, and the pre-evaluation unit performs initial power consumption measurement according to the power utilization scene to obtain the power utilization range.
Further, the specific way of initial measurement of the power consumption is as follows:
1): acquiring the power consumption of nearly forty times of power consumption corresponding to the same power consumption scene; marking all the acquired electricity consumption data as electricity consumption memory data groups Yi, i ═ 1,. and n;
2): then all the electricity utilization memory data sets Yi are obtained, the average value of the electricity utilization memory data sets Yi is obtained, the obtained average value is marked as a limit value, electricity consumption meeting the condition that Yi-the limit value is more than or equal to 0 is selected, and the electricity consumption is marked as a potential data set;
3): carrying out mean value calculation on the potential data groups, and marking the obtained values as electricity measurement estimated values; subtracting the measured value from the maximum value in the potential data group, and multiplying by two to obtain a value marked as an allowed value;
4): the range from the measured value to the measured value plus the allowed value is marked as the electricity utilization range.
Furthermore, the pre-evaluation unit is also in communication connection with the processor and transmits the power utilization range to the processor, the processor receives the power utilization range transmitted by the pre-evaluation unit and transmits the power utilization range to the strategy pre-evaluation unit, the strategy pre-evaluation unit is synchronous with the BMS control group and is used for acquiring the power utilization stock of the BMS control group, and the power utilization stock is the reserved power utilization quantity of each BMS module in the corresponding BMS control group; the strategy pre-evaluation unit is used for acquiring the required BMS module number and marking the BMS module number as the strategy number, and the specific acquisition mode is as follows:
and acquiring the required quantity of the BMS modules in a mode of multiplying the maximum value of the power utilization range by 1.2, namely, the required quantity of the BMS modules is obtained by multiplying the maximum value of the power utilization range by 1.2, then dividing the obtained value by the power utilization inventory of a single BMS module, if the obtained value has a remainder, rounding the value and then adding one, otherwise, directly taking the value, and defaulting the power utilization inventory of all the BMS modules to be in a full state, and marking the quantity as the strategy quantity.
Furthermore, the processor is also bidirectionally connected with a state synchronization unit, the state synchronization unit is bidirectionally communicated with the BMS control group and is used for acquiring the residual stock of the BMS control group in real time, and the partition unit is arranged among a plurality of BMS modules which are connected in parallel in the BMS control group and is used for blocking the connection relation among the BMS modules and ensuring the external output.
The invention has the beneficial effects that:
according to the invention, by acquiring the electricity storage quantity, when a certain condition is met, a primary supplementary signal is generated, the BMS module corresponding to Lj and two adjacent BMS modules thereof are automatically isolated to form an independent parallel group, so that the charging and discharging are carried out, and when the performance difference is less than or equal to X1, the isolation is stopped, and the whole audience module is merged again; when any second dangerous condition exists, an alarm signal is automatically started, the BMS module with low electricity storage is isolated independently, the backup module is transferred to charge the BMS module until the conditions are met, and the BMS module is merged again;
the battery pack management method and the battery pack management system can provide a better available parallel BMS module battery pack management scheme, and ensure enough safety; the invention is simple, effective and easy to use.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a block diagram of the system of the present invention.
Detailed Description
As shown in fig. 1, in the first embodiment:
a battery management system with a plurality of BMS modules connected in parallel comprises a BMS control group, wherein the BMS control group is formed by connecting a plurality of BMS modules in parallel and mainly controls a battery pack formed by batteries of the corresponding BMS modules;
the system comprises a scene acquisition unit and a pre-evaluation unit, wherein the scene acquisition unit is used for acquiring the power consumption requirements of audience objects, and the specific mode is to acquire the power consumption scene which is used for describing the specific power consumption of the equipment under the requirements during single use; the scene acquisition unit is used for transmitting the power consumption scene to the pre-evaluation unit, and the pre-evaluation unit carries out the initial measurement of the power consumption according to the power consumption scene, and the initial measurement of the power consumption has the specific mode that:
1): the power consumption of nearly forty times of power consumption corresponding to the same power consumption scene is obtained, the past data are automatically obtained through a power consumption database, and the power consumption database can record the power consumption scene and the corresponding power consumption each time, which is not the key point of the application, so detailed description is not needed; marking all the acquired electricity consumption data as electricity consumption memory data groups Yi, i is 1, n, wherein Y1 represents a data value of the first electricity consumption closest to the current time, and Yi represents a data value of the ith electricity consumption;
2): then all the electricity utilization memory data sets Yi are obtained, the average value of the electricity utilization memory data sets Yi is obtained, the obtained average value is marked as a limit value, electricity consumption meeting the condition that Yi-the limit value is more than or equal to 0 is selected, and the electricity consumption is marked as a potential data set;
3): carrying out mean value calculation on the potential data groups, and marking the obtained values as electricity measurement estimated values; subtracting the measured value from the maximum value in the potential data group, and multiplying by two to obtain a value marked as an allowed value;
4): marking the range from the electricity measurement value to the electricity measurement value plus the allowed value as an electricity utilization range;
the pre-evaluation unit is also in communication connection with a processor and transmits a power utilization range to the processor, the processor receives the power utilization range transmitted by the pre-evaluation unit and transmits the power utilization range to the strategy pre-evaluation unit, the strategy pre-evaluation unit is synchronous with the BMS control groups and is used for acquiring the power utilization stock of the BMS control groups, the power utilization stock is the reserved power utilization amount of each BMS module in the corresponding BMS control groups, the strategy pre-evaluation unit is used for acquiring the required quantity of the BMS modules in a mode that the maximum value of the power utilization range is multiplied by 1.2, the required quantity of the BMS modules is the value obtained by multiplying the maximum value of the power utilization range by 1.2 and then dividing the value by the power utilization stock of the single BMS module, if a remainder exists, the obtained value is integrated and then is added, otherwise, the value is directly acquired, the power utilization of all the BMS modules is defaulted to be in a full stock state, and the quantity is marked as the strategy quantity;
the processor is also bidirectionally connected with a state synchronization unit, the state synchronization unit is bidirectionally communicated and connected with the BMS control group and is used for acquiring the residual stock of the BMS control group in real time, the partition unit is arranged between a plurality of parallel BMS modules in the BMS control group and is used for blocking the connection relation between the BMS modules and ensuring the external output, two groups of the partition unit can be arranged on a positive output port connecting wire and a negative output port connecting wire, one group of the partition unit is connected with the rest BMS modules, one group of the partition unit is connected with the positive output port and the negative output port which are externally connected with electric equipment, and a switch is arranged on a circuit of the two groups of the partition unit, so that whether the power is supplied by the partition unit in parallel connection or independently supplied by the switch;
the strategy pre-evaluation unit is used for returning the strategy quantity to the processor, the processor receives the strategy quantity and then automatically combines the partition unit, the BMS control group and the state synchronization unit to perform power utilization follow-up control, and the power utilization follow-up control specifically comprises the following steps:
the method comprises the following steps: acquiring the corresponding strategy quantity;
step two: calling the BMS modules calling the corresponding strategy number in the BMS control group for power supply, and separating the rest BMS modules by virtue of the separation units;
step three: then, the BMS modules corresponding to the strategy quantity are marked as audience modules;
step four: calling a partitioned BMS module, and marking the partitioned BMS module as a backup module;
step five: starting an audience module to charge the audience objects, acquiring the electricity storage of all the audience modules in real time in the charging process, and marking the electricity storage as Lj, j being 1, 1. Here Lj are sequentially marked in the order in which the respective BMS modules are connected in parallel;
step six: when the BMS modules are charged in parallel, when the performance difference exists among the BMS modules, the performance difference refers to the electric quantity difference, and the rest BMS modules cause a mutual discharging process to cause certain damage; therefore, it is performed here to first obtain the risk range and the warning value, specifically by:
acquiring accidents caused by mutual charging and discharging of a plurality of BMS modules recently, and regarding the conditions of damage to the battery pack, fire and the like as the accidents;
acquiring specific values of performance differences among BMS modules in each accident and marking the specific values as performance differences;
carrying out average value calculation on the performance difference value, marking the value as a target value, then obtaining the minimum value of the performance difference value, and marking the minimum value as a threshold value; multiplying the threshold value by a preset coefficient to obtain an early warning value, wherein the preset coefficient is obtained by multiple experiments and deduction through a reverse result; the preset value is a numerical value preset by a manager;
marking the range from the threshold value to the target value as a danger range;
obtaining a danger range and an early warning value;
step seven: acquiring a power utilization stock Lj, wherein when | Lj-Lj-1|, j is 2,. When the performance difference value is less than or equal to X1, the isolation is stopped and the whole audience module is merged again; the X1 value is a preset value for a manager, and the specific value is derived by the manager through multiple experiments;
when any value | Lj-Lj-1| is in a dangerous range, an alarm signal is automatically started, a BMS module with low electricity storage is isolated independently, and a backup module is called to charge the BMS module until the value | Lj-Lj-1| is less than an early warning value-5X 1;
step eight: continuously monitoring in the seventh step;
when an alarm signal is generated, the processor is also used for transmitting the alarm signal to the reminding unit, and the reminding unit automatically informs a manager that an abnormal condition occurs; here to remind the manager to attend;
the processor is also in communication connection with a management unit, and the management unit is used for a worker to input all preset values;
as another embodiment of the present invention, on the basis of the first embodiment, in the seventh step of performing the electricity consumption follow-up control step by the processor in combination with the partition unit, the BMS control group, and the state synchronization unit, the following operations are further performed:
monitoring the number of the primary supplementary signals generated simultaneously in real time, and marking the number as an initial risk number; the simultaneous generation here means that the time interval generated before and after the generation of a plurality of primary supplementary signals does not exceed ten seconds or other preset time;
dividing the initial danger number by m to obtain a mark as a difference ratio, and generating a stop signal when the difference ratio exceeds 0.75, wherein the processor controls the BMS control group to stop working; self-protection is carried out;
meanwhile, the number of alarm signals generated simultaneously can be monitored in real time, the number is divided by m, the obtained numerical value is marked as a high-risk ratio, when the high-risk ratio exceeds 0.45, a stop signal is generated, and the BMS control group is controlled by the processor to stop working; self-protection is performed.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (7)
1. The battery management system with the plurality of BMS modules connected in parallel is characterized by comprising a strategy pre-evaluation unit, a processor, a BMS control group and a state synchronization unit;
the strategy pre-evaluation unit is used for acquiring the required BMS module number and marking the BMS module number as the strategy number, and the specific acquisition mode is as follows:
acquiring the required quantity of the BMS modules in a mode of multiplying the maximum value of the power utilization range by 1.2, namely, the required quantity of the BMS modules is obtained by multiplying the maximum value of the power utilization range by 1.2, then dividing the obtained value by the power utilization stock of a single BMS module, if the obtained numerical value has a remainder, rounding the numerical value and then adding one, otherwise, directly acquiring the numerical value, and defaulting the power utilization stock of all the BMS modules to be in a full state, and marking the quantity as the strategy quantity;
the strategy pre-evaluation unit is used for returning the strategy quantity to the processor, the processor receives the strategy quantity and then automatically combines the partition unit, the BMS control group and the state synchronization unit to perform power utilization follow-up control, and the power utilization follow-up control specifically comprises the following steps:
the method comprises the following steps: acquiring the corresponding strategy quantity;
step two: calling the BMS modules calling the corresponding strategy number in the BMS control group for power supply, and separating the rest BMS modules by virtue of the separation units;
step three: then, the BMS modules corresponding to the strategy quantity are marked as audience modules;
step four: calling a partitioned BMS module, and marking the partitioned BMS module as a backup module;
step five: starting an audience module to charge the audience objects, acquiring the electricity storage of all the audience modules in real time in the charging process, and marking the electricity storage as Lj, j being 1, 1. The Lj is marked in sequence according to the parallel connection sequence of each BMS module, and the electricity utilization stock is the electricity consumption reserved by each BMS module in the corresponding BMS control group;
step six: acquiring a danger range and an early warning value;
step seven: acquiring a power utilization stock Lj, wherein when | Lj-Lj-1|, j is 2,. When the performance difference value is less than or equal to X1, the isolation is stopped and the whole audience module is merged again; the X1 value is a preset value for a manager;
when any value | Lj-Lj-1| is in a dangerous range, an alarm signal is automatically started, a BMS module with low electricity storage is isolated independently, and a backup module is called to charge the BMS module until the value | Lj-Lj-1| is less than an early warning value-5X 1;
step eight: and continuously monitoring in the seventh step.
2. The battery management system of claim 1, wherein the danger range and the warning value in the sixth step are obtained by:
acquiring accidents caused by mutual charging and discharging of a plurality of BMS modules recently, and regarding the accidents caused by damage to the battery pack and fire caused by the damage as accidents;
acquiring specific values of performance differences among BMS modules in each accident and marking the specific values as performance differences;
carrying out average value calculation on the performance difference value, marking the value as a target value, then obtaining the minimum value of the performance difference value, and marking the minimum value as a threshold value; multiplying the threshold value by a preset coefficient to obtain an early warning value, wherein the preset coefficient is obtained by multiple experiments and deduction through a reverse result; the preset value is a numerical value preset by a manager;
marking the range from the threshold value to the target value as a danger range;
and obtaining a danger range and an early warning value.
3. The system of claim 1, wherein the processor is further configured to transmit an alarm signal to a reminder unit, and the reminder unit automatically notifies a manager of the abnormal situation.
4. The system according to claim 1, further comprising a BMS control group consisting of a plurality of BMS modules connected in parallel, which mainly controls the battery pack consisting of the batteries of the corresponding BMS modules;
the system comprises a scene acquisition unit and a pre-evaluation unit, wherein the scene acquisition unit is used for acquiring the power consumption requirements of audience objects, and the power consumption requirements specifically comprise power consumption scenes; the scene acquisition unit is used for transmitting the power utilization scene to the pre-evaluation unit, and the pre-evaluation unit performs initial power consumption measurement according to the power utilization scene to obtain the power utilization range.
5. The battery management system of claim 4, wherein the initial power consumption measurement is performed by:
1): acquiring the power consumption of nearly forty times of power consumption corresponding to the same power consumption scene; marking all the acquired electricity consumption data as electricity consumption memory data groups Yi, i ═ 1,. and n;
2): then all the electricity utilization memory data sets Yi are obtained, the average value of the electricity utilization memory data sets Yi is obtained, the obtained average value is marked as a limit value, electricity consumption meeting the condition that Yi-the limit value is more than or equal to 0 is selected, and the electricity consumption is marked as a potential data set;
3): carrying out mean value calculation on the potential data groups, and marking the obtained values as electricity measurement estimated values; subtracting the measured value from the maximum value in the potential data group, and multiplying by two to obtain a value marked as an allowed value;
4): the range from the measured value to the measured value plus the allowed value is marked as the electricity utilization range.
6. The system according to claim 4, wherein the battery management system comprises a plurality of BMS modules connected in parallel:
the pre-evaluation unit is also in communication connection with the processor and transmits the power utilization range to the processor, the processor receives the power utilization range transmitted by the pre-evaluation unit and transmits the power utilization range to the strategy pre-evaluation unit, and the strategy pre-evaluation unit is synchronized with the BMS control group and used for acquiring the power utilization inventory of the BMS control group.
7. The system of claim 6, wherein the processor is further bi-directionally connected with a status synchronization unit, the status synchronization unit is bi-directionally communicatively connected with the BMS control group for real-time acquisition of the remaining inventory of the BMS control group, and the blocking unit is disposed between a plurality of parallel BMS modules in the BMS control group for blocking the connection between the BMS modules and ensuring the output.
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| KR101648893B1 (en) * | 2015-02-03 | 2016-08-17 | 삼성에스디아이 주식회사 | Battery pack and controlling method thereof |
| CN106532800A (en) * | 2016-10-13 | 2017-03-22 | 惠州市蓝微新源技术有限公司 | Battery management system with parallel connection of multiple BMS modules and realization method thereof |
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