CN114079298A - Safe BMS system for balanced control and abnormal rapid protection of battery energy storage system - Google Patents
Safe BMS system for balanced control and abnormal rapid protection of battery energy storage system Download PDFInfo
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- CN114079298A CN114079298A CN202010798154.5A CN202010798154A CN114079298A CN 114079298 A CN114079298 A CN 114079298A CN 202010798154 A CN202010798154 A CN 202010798154A CN 114079298 A CN114079298 A CN 114079298A
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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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The safe BMS system for the equalization control and the abnormal quick protection of the battery energy storage system has the advantages that the battery and the battery cluster are monitored in real time through the energy storage system communication line, the battery control communication line and the battery cluster communication line, the balance of the electric quantity of the battery cluster is realized, and the problem of short plate effect of the energy storage system is effectively solved; meanwhile, a relay on each battery operation parameter monitoring and sampling module is omitted, an electric control switch on-off driving electric signal and a terminal of each battery operation parameter monitoring and sampling module are respectively and directly connected with an electric control switch of a battery cluster connection direct current bus, namely when the battery is monitored to be abnormal, the battery operation parameter monitoring and sampling module directly and electrically drives the electric control switch of the battery cluster connection direct current bus to be disconnected, and accidents are prevented; the invention not only simplifies the structure and the constitution of the system, saves the cost, achieves the beneficial effect of getting twice the result with half the effort, but also improves the response speed and the reliability of the BMS to the battery protection.
Description
Technical Field
The invention belongs to the technical field of energy storage battery management systems, and particularly relates to a safe BMS system for balanced control and abnormal rapid protection of a battery energy storage system.
Background
The utility model is the utility model with the publication number of CN210577773U and the subject name of BMS safety chain protection device, and the technical proposal discloses that the input end of each battery measuring unit is electrically connected with the output relay K0 of the battery system main control unit, and the output end of each battery measuring unit is respectively provided with the output relay; the direct current control unit comprises a main contactor KM, output relays at the output ends of the battery measurement units are mutually connected in series and are electrically connected with an input interface of the direct current control unit of the junction cabinet, and an output interface of the direct current control unit is in butt joint with a battery pack of the junction cabinet. The "public solution also records that" the BSU receives an upper EMS (Energy Management System) command to allow operation. The BSU does not detect the fault, the output relay K0 contact is closed, and 24V control electricity is output. Through every BTU (when each electric core voltage, temperature, when normal, its output relay contact is closed) output relay contact is established ties (K13, K12.. said, K1), for DCU's input interface Power supply, through the opto-coupler isolation, DCU obtains the normal signal of group cluster, if received the instruction that BSU closed a floodgate at this moment, main contactor KM closed a floodgate, and the group battery is connected with PCS (Power Convert System). Otherwise, when the BTU fails, the DCU receives the abnormal signal of the battery string as long as one of the K1-K13 is disconnected, the KM is quickly disconnected (without passing through a communication network), and the connection between the battery pack and the PCS is cut off, so that the safety of the battery pack is ensured.
Taking the above utility model patent as an example, there is the shortcoming in above-mentioned technical scheme, mainly is:
1) the safe start cannot be carried out: before the relay K0 contact is closed, each BTU controls electricity to be not conducted, the DCU cannot work and acquire battery parameters, and the BSU cannot judge whether the battery has faults or not; if a set of power supply system is added, the cost is increased and waste is caused.
2) Response delay: even if the operation is started, because a two-stage driving power-off mode is adopted, namely when the battery measuring unit finds that the battery is abnormal, the relay (one corresponding to K1-K13) on the BTU of the DCU is firstly driven to be disconnected, so that the DCU receives an abnormal signal of the battery pack and disconnects the KM again, the time of one driving and disconnecting action is increased, and the response delay is caused.
3) The electric quantity of the battery cluster cannot be balanced: because only the output relays of the output ends of the battery measuring units are connected in series and are electrically connected with the input interface (power supply) of the direct current control unit of the confluence cabinet, only the transmission of on-off driving signals of the relays or the contactors can be carried out, and the electric quantity information of each battery parameter and each battery cluster cannot be transmitted to the DCU, the BSU and the higher-level EMS, the electric quantity balance of the battery clusters cannot be carried out, the short board effect of the energy storage system cannot be solved, and the effect of the energy storage system is reduced.
4) High cost and poor reliability: because each battery measuring unit BTU is provided with a relay and the output relays of the output ends of the battery measuring units are mutually connected in series, a plurality of relays not only increase the cost, but also reduce the reliability of the system.
Disclosure of Invention
Aiming at the situation of the prior art, the invention provides a safe BMS system for balancing control and abnormal quick protection of a battery energy storage system to overcome the defects.
The main object of the present invention is to improve the construction of the BMS system and optimize the system configuration, reduce the cost, increase the operation efficiency of the energy storage system, and improve the response speed and reliability of the BMS to the battery protection.
The invention adopts the following technical scheme that a safe BMS system for balanced control and abnormal quick protection of a battery energy storage system is characterized in that an energy storage battery management and control unit is connected with a superior energy storage management system EMS and generates electric quantity and health condition data of a reported battery in real time, the command for switching regulation and control is sent to the energy storage battery management and control unit by a short-plate battery cluster with electric quantity deviation exceeding a preset range in the process of controlling the energy storage and charging and discharging of the battery by the superior energy storage management system EMS, the energy storage battery management and control unit controls an electric control switch of a direct current bus connected with a corresponding battery cluster to be switched off through a battery cluster management and control module, and the electric control switch of the direct current bus connected with the corresponding battery cluster is controlled to be switched on when the electric quantity deviation is smaller than the preset range; the battery energy storage system balance control and abnormal rapid protection safety BMS system comprises the following components: at least one high-voltage direct current cabinet and an energy storage battery management and control unit comprising a working power supply connecting switch are matched; each high-voltage direct-current cabinet comprises a battery cluster control module connected with each battery operation parameter monitoring and sampling module and an electric control switch of a battery cluster connection direct-current bus, namely a relay or a contactor driven to be switched on and off by an electric signal, wherein each battery operation parameter monitoring and sampling module is respectively provided with an electric control switch on-off driving electric signal and a terminal, each electric control switch on-off driving electric signal and terminal are respectively and directly connected with an electric control switch of the corresponding battery cluster connection direct-current bus, and when the battery operation parameter monitoring and sampling module monitors and finds that the battery is abnormal, the electric control switch of the corresponding battery cluster connection direct-current bus is directly driven to be switched off.
The safety BMS system according to claim 1, wherein the electric control switches of the DC bus connected to the battery cluster are respectively connected to the high-voltage DC bus and the battery cluster to form a DC power path between the battery cluster and the PCS.
The safety BMS system according to claim 1, wherein the battery cluster is formed by connecting a plurality of battery packs in series, and each battery pack is formed by connecting a plurality of batteries in series.
The safety BMS system according to claim 1, wherein the battery operation parameter monitoring and sampling module is connected to each battery in the battery pack to form a full-cell real-time monitoring path and system of the battery energy storage system.
The safe BMS system according to claim 1, wherein an energy storage management system EMS (energy management System) is connected with an energy storage battery management and control unit and an energy storage converter PCS (Power management System) through an energy storage system communication line, and the energy storage battery management and control unit interacts information with the energy storage battery management and control unit, regulates and controls the balance of the electric quantity of the battery cluster, and controls the charging and discharging power of the energy storage converter PCS at the same time.
The safe BMS system according to claim 1, wherein the energy storage battery management and control unit is connected to the battery cluster management and control modules through battery management and control communication lines to obtain real-time battery operating parameters and manage the battery in real time.
The safe BMS system according to claim 1, wherein the battery cluster management and control module is connected to the battery operation parameter monitoring and sampling modules through a battery cluster communication line, and is configured to monitor and read the operation voltage and temperature parameters of each battery in real time, calculate and analyze the operation voltage and temperature parameters, and generate data on the dynamic electric quantity and the health state of the battery.
The safety BMS system for the equalization control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery operation parameter monitoring and sampling module mainly comprises: embedded controller MPU, data memory, signal sampling circuit, automatically controlled switch break-make signal drive circuit and signal of telecommunication port, communication interface circuit, clock circuit, working power supply circuit, module control bus, wherein:
the embedded controller MPU is respectively connected with the data memory, the signal sampling circuit, the electric control switch on-off signal driving circuit, the electric signal port, the communication interface circuit, the clock circuit and the working power supply circuit through the module control bus, the embedded controller MPU reads the running parameters of the battery in real time through the signal sampling circuit, and when the battery parameters exceed a preset normal range, the embedded controller MPU sends an electric signal for driving the battery cluster to be connected with the electric control switch of the direct current bus through the electric control switch on-off signal driving circuit and the electric signal port to disconnect the corresponding battery cluster from the direct current bus.
The safe BMS system for the equalization control and the abnormal quick protection of the battery energy storage system has the advantages that the battery and the battery cluster are monitored in real time through the energy storage system communication line, the battery control communication line and the battery cluster communication line, the balance of the electric quantity of the battery cluster is realized, and the problem of short plate effect of the energy storage system is effectively solved; meanwhile, a relay on each battery operation parameter monitoring and sampling module is omitted, an electric control switch on-off driving electric signal and a terminal of each battery operation parameter monitoring and sampling module are respectively and directly connected with an electric control switch of a battery cluster connection direct current bus, namely when the battery is monitored to be abnormal, the battery operation parameter monitoring and sampling module directly and electrically drives the electric control switch of the battery cluster connection direct current bus to be disconnected, and accidents are prevented; therefore, the system structure and the structure are simplified, the cost is saved, the beneficial effect of achieving twice the result with half the effort is achieved, and meanwhile, the response speed and the reliability of the BMS to the battery protection are improved.
Drawings
Fig. 1 is a schematic block diagram of a safety BMS system for equalization control and abnormal rapid protection of a battery energy storage system and a configuration thereof.
Fig. 2 is a schematic diagram of the battery operation parameter monitoring and sampling module.
Detailed Description
A safety BMS system for equalization control and abnormal rapid protection of a battery energy storage system will be described with reference to the accompanying drawings as an example of implementation, but the described embodiment is a part of, rather than all, embodiments of a safety BMS system for equalization control and abnormal rapid protection of a battery energy storage system to which the present invention is applied. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The techniques and schemes of the present invention are not limited to those given in this example.
As shown in fig. 1, a safe BMS system for equalizing control and abnormal fast protection of a battery energy storage system is characterized in that an energy storage battery management and control unit (3) is connected to a higher-level energy storage management system EMS (2) and generates electric quantity and health status data of a reported battery in real time, the energy storage battery management and control unit (3) is subjected to switching regulation and control instructions sent to the energy storage battery management and control unit (3) by the higher-level energy storage management system EMS (2) in the process of controlling battery energy storage charging and discharging, the energy storage battery management and control unit (3) controls an electric control switch (6) of a corresponding battery cluster connected with a dc bus to be turned off through a battery cluster management and control module (5), and the electric control switch (6) of the corresponding battery cluster connected with the dc bus is controlled to be turned on when the electric quantity deviation is smaller than a preset range; the battery energy storage system balance control and abnormal rapid protection safety BMS system comprises the following components: at least one high-voltage direct current cabinet (1) and an energy storage battery management and control unit (3) comprising a working power supply connecting switch (30) are matched; each high-voltage direct-current cabinet (1) comprises a battery cluster control module (5) connected with each battery operation parameter monitoring and sampling module (4) and an electric control switch (6) of a battery cluster connection direct-current bus, namely, a relay or a contactor driven to be switched on and switched off by an electric signal, each battery operation parameter monitoring and sampling module (4) is respectively provided with an electric control switch on-off driving electric signal and a terminal (7), each electric control switch on-off driving electric signal and terminal (7) are respectively and directly connected with an electric control switch (6) of the corresponding battery cluster connection direct-current bus, and when the battery operation parameter monitoring and sampling module (4) monitors and finds that the battery is abnormal, the electric control switch (6) directly driving the corresponding battery cluster connection direct-current bus is switched off.
The safety BMS system for equalizing control and abnormal rapid protection of a battery energy storage system according to claim 1, wherein the electric control switch (6) of the battery cluster connection DC bus is respectively connected with the high voltage DC bus (8) and the battery cluster (9) to form a DC power path between the battery cluster and the battery energy storage PCS.
The safety BMS system for battery energy storage system equalization control and abnormal fast protection according to claim 1, characterized in that the battery cluster (9) is composed of a plurality of battery packs connected in series, wherein each battery pack (10) is composed of a plurality of batteries connected in series.
The safety BMS system for the equalization control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery operation parameter monitoring and sampling module (4) is respectively connected with each battery in the battery pack (10) to form a full-cell real-time monitoring path and system of the battery energy storage system.
The safety BMS system as claimed in claim 1, wherein the EMS (energy storage management System) 2 is connected to the energy storage battery management and control unit (3) and the energy storage converter PCS through the energy storage system communication line (21), and interacts information with the energy storage battery management and control unit (3) to control the balance of the electric quantity of the battery cluster and control the charging and discharging power of the energy storage converter PCS.
The safe BMS system for equalizing control and abnormal rapid protection of a battery energy storage system according to claim 1, wherein the energy storage battery management and control unit (3) is connected to each battery cluster management and control module (5) through a battery management and control communication line (31) to obtain real-time battery operating parameters and manage the battery in real time.
The safe BMS system for the balanced control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery cluster management and control module (5) is connected with each battery operation parameter monitoring and sampling module (4) through a battery cluster communication line (11), and is used for monitoring and reading the operation voltage and temperature parameters of each battery in real time, calculating and analyzing the operation voltage and temperature parameters, and generating the data of the dynamic electric quantity and the health state of the battery.
According to claim 1
As shown in fig. 2, the safety BMS system for balancing control and abnormal fast protection of a battery energy storage system is characterized in that the battery operation parameter monitoring and sampling module (4) mainly comprises: embedded controller MPU (41), data memory (42), signal sampling circuit (43), automatically controlled switch break-make signal drive circuit and signal of telecommunication port (44), communication interface circuit (45), clock circuit (46), working power supply circuit (47), module control bus (48), wherein:
the embedded controller MPU (41) is respectively connected with the data memory (42), the signal sampling circuit (43), the electric control switch on-off signal driving circuit and the electric signal port (44), the communication interface circuit (45), the clock circuit (46) and the working power supply circuit (47) through a module control bus (48), the embedded controller MPU (41) reads the running parameters of the battery in real time through the signal sampling circuit (43), and when the battery parameters exceed the preset normal range, the embedded controller MPU (41) sends the electric signal for driving the battery cluster to be connected with the electric control switch (6) of the direct current bus to be disconnected through the electric control switch on-off signal driving circuit and the electric signal port (44), so that the connection between the corresponding battery cluster and the direct current bus is disconnected.
The safe BMS system for the equalization control and the abnormal quick protection of the battery energy storage system has the advantages that the battery and the battery cluster are monitored in real time through the energy storage system communication line (21), the battery management and control communication line (31) and the battery cluster communication line (11), the balance of the electric quantity of the battery cluster is realized, and the problem of short plate effect of the energy storage system is effectively solved; meanwhile, a relay on each battery operation parameter monitoring and sampling module (4) is omitted, an electric control switch on-off driving electric signal and a terminal (7) of each battery operation parameter monitoring and sampling module (4) are respectively and directly connected with an electric control switch (6) of a battery cluster connection direct current bus, namely when the battery is monitored to be abnormal, the battery operation parameter monitoring and sampling module (4) directly and electrically drives the electric control switch (6) of the battery cluster connection direct current bus to be disconnected, and accidents are prevented; therefore, the system structure and the structure are simplified, the cost is saved, the beneficial effect of achieving twice the result with half the effort is achieved, and meanwhile, the response speed and the reliability of the BMS to the battery protection are improved.
Claims (8)
1. A safe BMS system for battery energy storage system equalization control and abnormal rapid protection is characterized in that an energy storage battery management and control unit (3) is connected with a superior energy storage management system EMS (2) and generates electric quantity and health condition data of a reported battery in real time, the command of switching regulation and control is sent to the energy storage battery management and control unit (3) by a short-plate battery cluster with electric quantity deviation exceeding a preset range in the process of controlling battery energy storage charging and discharging by the superior energy storage management system EMS (2), the energy storage battery management and control unit (3) controls an electric control switch (6) of a direct current bus connected with a corresponding battery cluster to be disconnected through a battery cluster management and control module (5), and the electric control switch (6) of the direct current bus connected with the corresponding battery cluster is controlled to be closed when the electric quantity deviation is smaller than the preset range; the battery energy storage system balance control and abnormal rapid protection safety BMS system comprises the following components: at least one high-voltage direct current cabinet (1) and an energy storage battery management and control unit (3) comprising a working power supply connecting switch (30) are matched; each high-voltage direct-current cabinet (1) comprises a battery cluster control module (5) connected with each battery operation parameter monitoring and sampling module (4) and an electric control switch (6) of a battery cluster connection direct-current bus, namely, a relay or a contactor driven to be switched on and switched off by an electric signal, each battery operation parameter monitoring and sampling module (4) is respectively provided with an electric control switch on-off driving electric signal and a terminal (7), each electric control switch on-off driving electric signal and terminal (7) are respectively and directly connected with an electric control switch (6) of the corresponding battery cluster connection direct-current bus, and when the battery operation parameter monitoring and sampling module (4) monitors and finds that the battery is abnormal, the electric control switch (6) directly driving the corresponding battery cluster connection direct-current bus is switched off.
2. The safety BMS system for equalizing control and abnormal rapid protection of a battery energy storage system according to claim 1, wherein the electric control switch (6) of the battery cluster connection DC bus is respectively connected with the high voltage DC bus (8) and the battery cluster (9) to form a DC power path between the battery cluster and the battery energy storage PCS.
3. The safety BMS system for battery energy storage system equalization control and abnormal rapid protection according to claim 1, wherein the battery cluster (9) is formed by a plurality of battery packs (10) connected in series, wherein each battery pack (10) is formed by a plurality of batteries connected in series.
4. The safety BMS system for the equalization control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery operation parameter monitoring and sampling module (4) is respectively connected with each battery in the battery pack (10) to form a full-cell real-time monitoring path and system of the battery energy storage system.
5. The safety BMS system as claimed in claim 1, wherein the EMS (energy storage management System) 2 is connected to the energy storage battery management and control unit (3) and the energy storage converter PCS through the energy storage system communication line (21), and interacts information with the energy storage battery management and control unit (3) to control the balance of the electric quantity of the battery cluster and control the charging and discharging power of the energy storage converter PCS.
6. The safe BMS system for equalizing control and abnormal rapid protection of a battery energy storage system according to claim 1, wherein the energy storage battery management and control unit (3) is connected to each battery cluster management and control module (5) through a battery management and control communication line (31) to obtain real-time battery operating parameters and manage the battery in real time.
7. The safe BMS system for the balanced control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery cluster management and control module (5) is connected with each battery operation parameter monitoring and sampling module (4) through a battery cluster communication line (11), and is used for monitoring and reading the operation voltage and temperature parameters of each battery in real time, calculating and analyzing the operation voltage and temperature parameters, and generating the data of the dynamic electric quantity and the health state of the battery.
8. The safety BMS system for the equalization control and the abnormal rapid protection of the battery energy storage system according to claim 1, wherein the battery operation parameter monitoring and sampling module (4) mainly comprises: embedded controller MPU (41), data memory (42), signal sampling circuit (43), automatically controlled switch break-make signal drive circuit and signal of telecommunication port (44), communication interface circuit (45), clock circuit (46), working power supply circuit (47), module control bus (48), wherein:
the embedded controller MPU (41) is respectively connected with the data memory (42), the signal sampling circuit (43), the electric control switch on-off signal driving circuit and the electric signal port (44), the communication interface circuit (45), the clock circuit (46) and the working power supply circuit (47) through a module control bus (48), the embedded controller MPU (41) reads the running parameters of the battery in real time through the signal sampling circuit (43), and when the battery parameters exceed the preset normal range, the embedded controller MPU (41) sends the electric signal for driving the battery cluster to be connected with the electric control switch (6) of the direct current bus to be disconnected through the electric control switch on-off signal driving circuit and the electric signal port (44), so that the connection between the corresponding battery cluster and the direct current bus is disconnected.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114726065A (en) * | 2022-06-09 | 2022-07-08 | 中国华能集团清洁能源技术研究院有限公司 | Control method and system for battery capacity balance |
| CN114779100A (en) * | 2022-04-25 | 2022-07-22 | 山东浪潮科学研究院有限公司 | BMS battery cluster management method and device |
| CN116014903A (en) * | 2023-03-27 | 2023-04-25 | 江苏林洋亿纬储能科技有限公司 | Coordination control method and system based on energy storage safety chain identification |
| CN116027206A (en) * | 2023-03-29 | 2023-04-28 | 安徽中科中涣智能装备股份有限公司 | Multi-element perception grading early warning intelligent monitoring system based on station-level energy storage |
| CN117595465A (en) * | 2024-01-18 | 2024-02-23 | 杭州高特电子设备股份有限公司 | Active equalization circuit of battery pack and protection system thereof |
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