CN116683514A - Electrochemical energy storage system capable of improving energy storage efficiency based on BMS regulation - Google Patents
Electrochemical energy storage system capable of improving energy storage efficiency based on BMS regulation Download PDFInfo
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- CN116683514A CN116683514A CN202310976545.5A CN202310976545A CN116683514A CN 116683514 A CN116683514 A CN 116683514A CN 202310976545 A CN202310976545 A CN 202310976545A CN 116683514 A CN116683514 A CN 116683514A
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- 238000012983 electrochemical energy storage Methods 0.000 title claims abstract description 16
- 238000004146 energy storage Methods 0.000 title claims abstract description 16
- 238000007599 discharging Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- 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
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- 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
-
- 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
-
- 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
- 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
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation, which comprises a charging module, a storage battery, a temperature acquisition module, an electric quantity acquisition module, a processing module and a control module, wherein the acquisition module is connected with the charging circuit and the storage battery and is used for connecting the charging circuit with the storage battery and charging the storage battery.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation.
Background
BMS is called a battery management system, and its purpose is to prevent the battery from being overdischarged or overcharged, which results in a reduction in the service life of the battery. In the process of charging and discharging the battery, the battery can generate heat, and when the heat is conducted to the battery, the charging and discharging processes of the battery can be influenced, so that the phenomenon that the battery is overcharged or overdischarged due to the influence of the heat in the charging and discharging processes of the battery is avoided, and the problem to be solved is urgent.
Disclosure of Invention
Accordingly, the present invention is directed to an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation, which solves the above-mentioned problems of the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
according to a first aspect of the present invention, an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation includes a charging module, a storage battery, a temperature acquisition module, an electric quantity acquisition module, a processing module, a control module, an acquisition module,
the charging module is connected with the charging circuit and the storage battery, is used for connecting the charging circuit with the storage battery and charging the storage battery,
the temperature acquisition module is used for monitoring and acquiring the temperature of the storage battery in the charging and discharging process so as to judge whether the storage battery is in an overcharged or overdischarged state,
the electric quantity acquisition module is used for acquiring the real-time electric quantity of the storage battery and sending the real-time electric quantity information to the processing module,
the processing module can compare the residual electricity quantity and the electricity quantity threshold value information of the storage battery and the temperature threshold value information of the storage battery to judge whether to output a control signal,
the control module is respectively connected with the processing module and the charging module and is used for controlling the charging efficiency of the charging module,
the acquisition module is connected with the processing module and is used for acquiring a charging curve and a charging amount of the storage battery under an ideal state.
Further, the specific working steps of the energy storage system are as follows:
s1, connecting a storage battery to a charging circuit and charging the storage battery,
s2, detecting the residual electric quantity of the storage battery, controlling the charging module through the control module to charge the storage battery,
s3, in the charging process, the temperature of the storage battery is obtained, and a temperature curve of the storage battery is drawn,
s4, when the temperature is smaller than a preset value and the electric quantity of the storage battery is smaller than a preset value, the control module can increase the charging voltage of the storage battery so as to accelerate the charging efficiency of the storage battery,
s5, charging is completed.
Further, setting a temperature threshold T, setting an electric quantity threshold Q, and setting a first charging voltage and a second charging voltage, wherein the second charging voltage is greater than the first charging voltage, and when the temperature acquisition module acquires that the residual electric quantity of the storage battery is less than Q, the control module can control the charging module so as to charge the storage battery by using the second charging voltage.
Further, the specific step of S2 is that,
step 21, when the storage battery is connected to the charging module, the storage battery is charged by using the first charging voltage,
in step 22, the control module can control the charging module after receiving the control signal, so that the charging module charges the storage battery using the second charging voltage.
Further, the specific step of S3 is that,
step 31, the temperature acquisition module acquires the real-time temperature of the storage battery during charging, and marks the real-time temperature as T1,
step 32, the electric quantity acquisition module acquires the electric quantity of the storage battery and marks the electric quantity as Q1,
in step 33, the values of Q1 and T1 are sent to the processing module, which compares Q with Q1 and T with T1,
in step 34, when Q1 is smaller than Q and T1 is smaller than T, the processing module can send a control signal to the control module, and the control module controls the charging module, so that the charging module charges the storage battery using the second charging voltage.
Further, the step S3 comprises the following steps,
in step 35, the temperature obtaining module obtains the temperature of the storage battery, and when the temperature T1 of the storage battery is greater than or equal to T, the control module can control the charging module, so that the charging module charges the storage battery by using the first charging voltage.
Further, the device also comprises a discharging module, wherein the discharging module is connected with the storage battery and the discharging circuit and is used for connecting the storage battery with the discharging circuit and enabling the storage battery to supply power to the discharging circuit.
Further, after the storage battery is charged, the method further comprises the following steps,
the first step, the initial residual capacity of the accumulator is obtained and marked as A,
the second step, the standard charging curve of the storage battery is obtained through an obtaining module, and the theoretical time B1 required by the full charge of the storage battery is calculated when the initial electric quantity is A,
third, record the actual time required for the accumulator from A to full and mark it as B2
Fourth, a charge efficiency improvement value is calculated by the following formula (B1-B2)/B1.
The invention has the following advantages:
when the method is implemented, the temperature of the storage battery can be detected, and the charging quantity of the storage battery is increased when the temperature of the storage battery is increased, so that the phenomenon of overcharging of the storage battery occurs after the temperature of the storage battery is reduced, the temperature of the storage battery during charging is acquired, the phenomenon of overcharging of the storage battery is avoided, and the charging power of the storage battery can be changed through the arranged processing module, so that the charging efficiency of the storage battery is accelerated.
Drawings
Fig. 1 is a block diagram of an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation according to some embodiments of the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, an electrochemical energy storage system for improving energy storage efficiency based on BMS regulation according to an embodiment of the first aspect of the present invention includes a charging module, a storage battery, a temperature acquisition module, an electric quantity acquisition module, a processing module, a control module, an acquisition module,
the charging module is connected with the charging circuit and the storage battery, is used for connecting the charging circuit with the storage battery and charging the storage battery, and is provided with two charging circuits, one of the charging circuits is a charging circuit under rated power, the other charging circuit is a charging circuit under non-preset power, the power of the other charging circuit under the non-preset power is larger than that of the charging circuit under the rated power,
the temperature acquisition module is used for monitoring and acquiring the temperature of the storage battery in the charging and discharging process so as to judge whether the storage battery is in an overcharged or overdischarged state, when the temperature is increased, the charge quantity of the storage battery is increased, and further, when the temperature of the storage battery is reduced, the phenomenon of overcharging of the storage battery is caused, so that the temperature of the storage battery in the charging process is acquired, the phenomenon of overcharging of the storage battery is avoided,
the processing module can compare the residual electricity quantity and the electricity quantity threshold value information of the storage battery and the temperature threshold value information of the storage battery to judge whether to output the control signal, the processing module can improve the charging efficiency on the premise of shortening the charging time,
the electric quantity acquisition module is used for acquiring the real-time electric quantity of the storage battery and sending the real-time electric quantity information to the processing module, when the residual electric quantity of the storage battery is smaller in the initial charging stage, the charging power can be increased to accelerate the charging efficiency of the storage battery, and when the storage battery is charged in the final charging stage, in order to avoid the condition that the temperature of the storage battery is increased to influence the capacitance of the storage battery due to high-power charging, the phenomenon of overcharging of the storage battery can be effectively avoided by using the low-power charging circuit,
the control module is connected with the processing module and the charging module respectively, and is used for controlling the charging efficiency of the charging module,
the acquisition module is connected with the processing module and is used for acquiring the charging curve and the charging quantity of the storage battery in an ideal state, and the charging curve of the storage battery is acquired, so that the temperature of the storage battery can be the same as or similar to the temperature of the storage battery under rated power when the system is used for implementing the system and the terminal charging period is achieved, and further damage possibly caused when the storage battery is charged by using the system is avoided.
The specific working steps of the energy storage system are as follows:
s1, connecting the storage battery to a charging circuit, and charging the storage battery by using a first charging circuit (namely rated charging power of the storage battery) at the beginning,
s2, detecting the residual electric quantity of the storage battery, controlling the charging module through the control module to charge the storage battery,
s3, in the charging process, the temperature of the storage battery is obtained, and a temperature curve of the storage battery is drawn,
s4, when the temperature is smaller than a preset value and the electric quantity of the storage battery is smaller than a preset value, the control module can increase the charging voltage of the storage battery so as to accelerate the charging efficiency of the storage battery,
s5, charging is completed.
When the temperature of the storage battery is greater than the T value, the storage battery may be in fault or dangerous, the electric quantity threshold Q is set, the first charging voltage and the second charging voltage are set, the second charging voltage is greater than the first charging voltage, and when the temperature acquisition module acquires that the residual electric quantity of the storage battery is less than Q, the control module can control the charging module so as to charge the storage battery by using the second charging voltage.
The specific steps of the step S2 are as follows,
step 21, when the storage battery is connected to the charging module, the storage battery is charged by using the first charging voltage,
in step 22, the control module can control the charging module after receiving the control signal, so that the charging module charges the storage battery using the second charging voltage.
The specific steps of the step S3 are as follows,
step 31, the temperature acquisition module acquires the real-time temperature of the storage battery during charging, and marks the real-time temperature as T1,
step 32, the electric quantity acquisition module acquires the electric quantity of the storage battery and marks the electric quantity as Q1,
in step 33, the values of Q1 and T1 are sent to the processing module, which compares Q with Q1 and T with T1,
in step 34, when Q1 is smaller than Q and T1 is smaller than T, the processing module can send a control signal to the control module, and the control module controls the charging module, so that the charging module charges the storage battery using the second charging voltage.
The step S3 further comprises the following steps,
in step 35, the temperature obtaining module obtains the temperature of the storage battery, and when the temperature T1 of the storage battery is greater than or equal to T, the control module can control the charging module, so that the charging module charges the storage battery by using the first charging voltage.
The battery charging device also comprises a discharging module, wherein the discharging module is connected with the battery and the discharging circuit and is used for connecting the battery with the discharging circuit and enabling the battery to supply power to the discharging circuit.
After the storage battery is charged, the method also comprises the following steps,
the first step, the initial residual capacity of the accumulator is obtained and marked as A,
the second step, the standard charging curve of the storage battery is obtained through an obtaining module, and the theoretical time B1 required by the full charge of the storage battery is calculated when the initial electric quantity is A,
third, record the actual time required for the accumulator from A to full and mark it as B2
Fourth, a charge efficiency improvement value is calculated by the following formula (B1-B2)/B1.
Claims (8)
1. An electrochemical energy storage system for improving energy storage efficiency based on BMS regulation is characterized by comprising a charging module, a storage battery, a temperature acquisition module, an electric quantity acquisition module, a processing module, a control module and an acquisition module,
the charging module is connected with the charging circuit and the storage battery, is used for connecting the charging circuit with the storage battery and charging the storage battery,
the temperature acquisition module is used for monitoring and acquiring the temperature of the storage battery in the charging and discharging process so as to judge whether the storage battery is in an overcharged or overdischarged state,
the electric quantity acquisition module is used for acquiring the real-time electric quantity of the storage battery and sending the real-time electric quantity information to the processing module,
the processing module can compare the residual electricity quantity and the electricity quantity threshold value information of the storage battery and the temperature threshold value information of the storage battery to judge whether to output a control signal,
the control module is connected with the processing module and the charging module respectively, and is used for controlling the charging efficiency of the charging module,
the acquisition module is connected with the processing module and is used for acquiring a charging curve and a charging amount of the storage battery under an ideal state.
2. The electrochemical energy storage system for improving energy storage efficiency based on BMS regulation of claim 1, wherein the specific working steps of the energy storage system are as follows:
s1, connecting a storage battery to a charging circuit and charging the storage battery,
s2, detecting the residual electric quantity of the storage battery, controlling the charging module through the control module to charge the storage battery,
s3, in the charging process, the temperature of the storage battery is obtained, and a temperature curve of the storage battery is drawn,
s4, when the temperature is smaller than a preset value and the electric quantity of the storage battery is smaller than a preset value, the control module can increase the charging voltage of the storage battery so as to accelerate the charging efficiency of the storage battery,
s5, charging is completed.
3. The electrochemical energy storage system for improving energy storage efficiency based on BMS regulation of claim 2, wherein a temperature threshold T is set, an electric quantity threshold Q is set, a first charging voltage and a second charging voltage are set, the second charging voltage is greater than the first charging voltage, and when the temperature acquisition module acquires that the remaining electric quantity of the storage battery is less than Q, the control module can control the charging module to charge the storage battery by using the second charging voltage.
4. An electrochemical energy storage system for improving energy storage efficiency based on BMS regulation according to claim 3, wherein the step of S2 is as follows,
step 21, when the storage battery is connected to the charging module, the storage battery is charged by using the first charging voltage,
in step 22, the control module can control the charging module after receiving the control signal, so that the charging module charges the storage battery using the second charging voltage.
5. The electrochemical energy storage system of claim 4, wherein S3 comprises the following steps of,
step 31, the temperature acquisition module acquires the real-time temperature of the storage battery during charging, and marks the real-time temperature as T1,
step 32, the electric quantity acquisition module acquires the electric quantity of the storage battery and marks the electric quantity as Q1,
in step 33, the values of Q1 and T1 are sent to the processing module, which compares Q with Q1 and T with T1,
in step 34, when Q1 is smaller than Q and T1 is smaller than T, the processing module can send a control signal to the control module, and the control module controls the charging module, so that the charging module charges the storage battery using the second charging voltage.
6. The electrochemical energy storage system of claim 5, wherein S3 further comprises the step of,
in step 35, the temperature obtaining module obtains the temperature of the storage battery, and when the temperature T1 of the storage battery is greater than or equal to T, the control module can control the charging module, so that the charging module charges the storage battery by using the first charging voltage.
7. The BMS-based conditioning electrochemical energy storage system of claim 6, further comprising a discharge module coupled to the battery and the discharge circuit for coupling the battery to the discharge circuit and for enabling the battery to power the discharge circuit.
8. The electrochemical energy storage system of claim 7, wherein the battery charging is completed and further comprising the step of,
the first step, the initial residual capacity of the accumulator is obtained and marked as A,
the second step, the standard charging curve of the storage battery is obtained through an obtaining module, and the theoretical time B1 required by the full charge of the storage battery is calculated when the initial electric quantity is A,
third, record the actual time required for the accumulator from A to full and mark it as B2
Fourth, a charge efficiency improvement value is calculated by the following formula (B1-B2)/B1.
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Application publication date: 20230901 |