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WO2018184160A1 - Procédé d'égalisation en ligne pour bloc-batterie et système associé - Google Patents

Procédé d'égalisation en ligne pour bloc-batterie et système associé Download PDF

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Publication number
WO2018184160A1
WO2018184160A1 PCT/CN2017/079528 CN2017079528W WO2018184160A1 WO 2018184160 A1 WO2018184160 A1 WO 2018184160A1 CN 2017079528 W CN2017079528 W CN 2017079528W WO 2018184160 A1 WO2018184160 A1 WO 2018184160A1
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WIPO (PCT)
Prior art keywords
equalization
discharge
charging
value
deviation value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/079528
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English (en)
Chinese (zh)
Inventor
应红峰
张益�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen ZNV Technology Co Ltd
Original Assignee
Shenzhen ZNV Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to PCT/CN2017/079528 priority Critical patent/WO2018184160A1/fr
Priority to CN201780002683.6A priority patent/CN108702005B/zh
Publication of WO2018184160A1 publication Critical patent/WO2018184160A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to the technical field of improving battery pack maintenance, and more particularly to a battery pack online equalization method and system thereof. Background technique
  • Battery packs are widely used in communication base stations and IDC (Internet Data Center) equipment rooms. They are mainly used to supply power to various devices after the mains power failure. The battery pack needs to monitor the battery pack temperature, voltage, internal resistance and other parameters and carry out daily management and maintenance to extend its service life.
  • the battery pack float voltage must be kept within a certain range. If the range is exceeded, the battery pack unit needs to be balancedly maintained, otherwise the battery pack life will be reduced.
  • the existing solution for balancing the voltage of the battery pack unit is: if the battery pack cell voltage is higher than the float voltage range, the battery pack unit is discharged through the resistive load, and the electric energy is dissipated through the resistive load in the form of heat energy; If the battery cell voltage is lower than the float voltage range, the external power source equalizes the battery pack and requires external power to charge the battery pack unit.
  • the main object of the present invention is to provide a battery pack online equalization method and system thereof, which are intended to realize online balancing maintenance of a unit in a battery pack that needs to be balanced, without manual intervention.
  • the present invention provides a battery pack online equalization method, where the method includes: [0007] collecting the cell voltage of the battery cells in the battery pack, and screening out the equalization monomers that need to be charged equalization or discharge equalization;
  • the equalization parameter includes at least one of a back value of the end of the equalization, a charging current and a length, a discharge current, a length, and a waiting time;
  • collecting the cell voltage of the battery cells in the battery pack, and screening the equalization monomers that need to perform charge equalization or discharge equalization include:
  • the deviation value is greater than zero, recording the first time that the deviation value is greater than the first preset value, and/or the second time number that the deviation value is greater than the second preset value; If the deviation value is less than zero, the third time that the deviation value is less than the third preset value is recorded, and/or the deviation value is less than the fourth number of the fourth preset value
  • the battery cell is labeled as an equalization unit
  • the equalizing process includes a charging and discharging phase and a static waiting phase
  • the equalizing processing the equalizing cells according to the equalizing parameter includes:
  • the equalization unit to be equalized is activated to initiate a charge and discharge phase of the equalization process.
  • the method further includes:
  • determining the equalization parameter according to the deviation value includes:
  • the equalization parameter when the deviation value is greater than a preset maximum positive value ⁇ , the equalization parameter includes a first discharge current, a first discharge time, and a first discharge waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum positive value and less than the preset maximum positive value ⁇ , the equalization parameter includes a second discharge current, a second discharge time, and a second discharge waiting time, and The second discharge current is 1/5 of the first discharge current, the second discharge time is equal to the first discharge time, and the second discharge waiting time is the first discharge waiting time. 2 times between;
  • the equalization parameter when the deviation value is greater than zero and less than the preset minimum positive value ⁇ , the equalization parameter includes a third discharge current, a third discharge time, a third discharge waiting time, and the third discharge
  • the current is 1/20 of the first discharge current
  • the third discharge time is 1/2 between the first discharge turns
  • the third discharge wait time is the first discharge waiting time 2 times;
  • the equalization parameter when the deviation value is less than a preset minimum negative value, includes a first charging current, a first charging time, and a first charging waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value and less than the preset maximum negative value ⁇ , the equalization parameter includes a second charging current, a second charging interval, and a second charging waiting time, and The second charging current is 1/5 of the first charging current, the second charging time is equal to the first charging time, and the second charging waiting time is the first charging waiting time. 2 times between;
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value ⁇ , the equalization parameter includes a third charging current, a third charging interval, a third charging waiting time, and the third charging The current is 1/20 of the first charging current, the third charging time is 1/2 between the first charging times, and the third charging waiting time is the first charging waiting time 2 times.
  • the present invention further provides a battery pack online equalization system, wherein the system includes:
  • an acquisition module configured to collect a cell voltage of a battery cell in the battery group
  • the control module is configured to filter out an equalization cell that needs to perform charge equalization or discharge equalization; and obtain a deviation value between the cell voltage of the equalization cell and the float voltage;
  • the equalization parameter module is configured to determine an equalization parameter according to the deviation value; the equalization parameter includes at least one of a back-off value of the end of the equalization, a charging current and a length, a discharge current, a length, and a waiting period.
  • the charge and discharge module is configured to perform equalization processing on the equalization unit according to the equalization parameter.
  • control module further includes a screening unit, configured to:
  • the deviation value is greater than zero, recording the first time that the deviation value is greater than the first preset value, and/or the second time number that the deviation value is greater than the second preset value; If the deviation value is less than zero, the third time that the deviation value is less than the third preset value is recorded, and/or the deviation value is less than the fourth number of the fourth preset value
  • the battery cell is labeled as an equalization unit
  • the equalization process includes a charging and discharging phase and a rest and waiting phase
  • the control module further includes an equalization notification unit, configured to:
  • the charging and discharging module is further configured to:
  • the equalization parameter is re-acquired according to the equalization deviation value, and the step of equalizing the equalization unit according to the equalization parameter is performed again.
  • the equalization parameter module is set to:
  • the equalization parameter when the deviation value is greater than a preset maximum positive value ⁇ , the equalization parameter includes a first discharge current, a first discharge time, and a first discharge waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum positive value and less than the preset maximum positive value ⁇ , the equalization parameter includes a second discharge current, a second discharge time, and a second discharge waiting time, and The second discharge current is 1/5 of the first discharge current, the second discharge time is equal to the first discharge time, and the second discharge waiting time is the first discharge waiting time. 2 times between;
  • the equalization parameter when the deviation value is greater than zero and less than the preset minimum positive value ⁇ , the equalization parameter includes a third discharge current, a third discharge time, a third discharge waiting time, and the third discharge
  • the current is 1/20 of the first discharge current
  • the third discharge time is 1/2 between the first discharge turns
  • the third discharge wait time is the first discharge waiting time 2 times;
  • the equalization parameter when the deviation value is less than a preset minimum negative value, includes a first charging current, a first charging time, and a first charging waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value and less than the preset maximum negative value ⁇ , the equalization parameter includes a second charging current, a second charging interval, and a second charging waiting time, and The second charging current is 1/5 of the first charging current, the second charging time is equal to the first charging time, and the second charging waiting time is the first charging waiting time. 2 times between;
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value ⁇ , the equalization parameter includes a third charging current, a third charging interval, a third charging waiting time, and the third charging The current is 1/20 of the first charging current, the third charging time is 1/2 between the first charging times, and the third charging waiting time is the first charging waiting time 2 times.
  • the battery pack online equalization method and system thereof according to the present invention perform online maintenance rather than offline maintenance for battery cells in the battery pack that require equalization processing.
  • the battery pack online equalization method and system thereof collect basic data such as battery cell voltage, temperature, float voltage and the like through the acquisition module, and send the data to the control module; the control module analyzes the basic data, according to the selection The condition of the battery cell obtains the matching equalization parameter from the equalization parameter module, and then performs equalization charging or equalization discharge through the charging and discharging module. During the process of equalizing charge and discharge, the acquisition module will collect and monitor the battery status and report it to the control module. If an abnormality occurs or the equilibrium end condition is reached, the equalization maintenance will be stopped immediately.
  • basic data such as battery cell voltage, temperature, float voltage and the like
  • the control module analyzes the basic data, according to the selection
  • the condition of the battery cell obtains the matching equalization parameter from the equalization parameter module, and then performs equalization charging or equalization discharge through the charging and discharging module.
  • the acquisition module will collect and monitor the battery status and report it to the control module. If an abnormality occurs or the equilibrium end condition is reached, the
  • the invention can perform on-line maintenance on the battery unit without intelligent intervention, intelligently judges the start and stop of the equalization operation, and does not affect the normal operation of the original system; and the online maintenance is easily affected by the UPS/gate power supply to the battery pack floating charge
  • the battery cell is balanced, and it is easy to set the return difference when the voltage is false or high.
  • FIG. 1 is a schematic flow chart of a battery pack online equalization method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of determining an equalization unit according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a process of determining an equalization unit according to another embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of a battery pack online equalization method according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a battery pack online equalization system according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a battery pack online equalization system according to another embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a battery pack online equalization system according to another embodiment of the present invention.
  • an embodiment of a battery pack online equalization method in an embodiment of the present invention includes a step [0074] 101, starting;
  • [0075] 102 Collect a cell voltage of the battery cells in the battery pack, and select an equalization monomer that needs to perform charge equalization or discharge equalization;
  • the deviation value is the difference between the cell voltage and the float voltage; if the deviation value is greater than zero, it indicates that the equalization cell needs to perform discharge equalization; if the deviation value is less than zero, it indicates that the equilibrium is The body needs to be charged and balanced;
  • the equalization parameter includes at least one of a back-off value at the end of the equalization, a charging current and a length, a discharge current, and a length of the waiting period; more specifically, an equalization unit that needs to perform discharge equalization.
  • the corresponding equalization parameter may include the back-off value of the end of the equalization, the discharge current and the length of the ⁇ , and the waiting time after the discharge is stopped.
  • the corresponding equalization parameter may include the end of the equilibrium ⁇ The difference between the return current, the charging current and the length of the battery, and the waiting time after stopping the charging.
  • the equalization parameter is determined by the deviation value between the cell voltage of the equalization cell and the float voltage; therefore, the equalization parameters corresponding to the equalization cells having different cell voltages are also different;
  • the equalization process performed on the equalization cells that need to perform charge equalization is the charge equalization process
  • the equalization process performed on the equalization cells that need to perform the discharge equalization is the discharge equalization process
  • the second embodiment of the battery pack online equalization method collects the battery cells in the battery pack.
  • the cell voltage, and the filtering of the equalization cells that need to be charged equalized or discharged equalized may include the steps of:
  • step 203 determining whether the current time point reaches the preset time point of the collected information; if yes, proceed to step 204; if not, return to step 202; [0088] 204, collecting a cell voltage of the battery cell;
  • step 207 determining whether the deviation value is greater than the first preset value; if yes, proceed to step 208; if not, proceed to step 220;
  • the first preset value is greater than 0; taking a 2v battery cell as an example, the first preset value may be 25mv
  • the second preset value is greater than the first preset value; taking a 2v battery cell as an example, the first preset value may be 50mv;
  • the first number of times is, for example, 24 times, and the second number of times is 2 times;
  • the third preset value is less than 0; taking a 2v battery cell as an example, the third preset value may be -25mv
  • [0104] 216 determining whether the deviation value is less than the fourth preset value; if yes, proceed to step 217; if not, proceed to step 218; [0105] wherein, the fourth preset value is less than the third preset value; taking a 2v battery cell as an example, the fourth preset value may be -50mv;
  • the third number of times is, for example, 24 times, and the fourth number of times is 2 times;
  • the normal monomer is a battery cell that does not need to be subjected to equalization treatment
  • the equalization processing includes a charging and discharging phase and a rest waiting phase, As shown in FIG. 4, performing equalization processing on the equalization unit according to the equalization parameter includes:
  • the corresponding equalization parameter includes the discharge current and the length or the charging current and the length of the ;; in the rest period, the corresponding equalization parameter includes waiting for the day after stopping the discharge or stopping the charging. Waiting for the daytime; it can be seen that the equalization parameter is determined by the deviation between the cell voltage of the equalization cell and the float voltage; therefore, the equalization parameters of the equalization cell of the cell voltage with different charging and discharging phases are The equalization parameters of the stationary waiting phase are also different;
  • the equalizing unit that is to be subjected to equalization processing starts a charging and discharging phase of the equalization processing
  • the equalization unit with a large deviation may be firstly equalized, and the deviation is performed.
  • the equalization unit with the second largest deviation is equalized; that is, the equalization process can be performed by the two equalization units;
  • the m equalization units may be equalized first, and after the m equalization units complete the equalization process, after the rest period is satisfied, the new m equalization units are equalized;
  • the specific value of m is not limited. When the hardware conditions permit, all equalization monomers can be equalized at one time.
  • the fourth embodiment of the battery pack online equalization method provided by the embodiment of the present invention includes a step [0131] 501;
  • the deviation value is the difference between the cell voltage and the float voltage; if the deviation value is greater than zero, it indicates that the equalization cell needs to perform discharge equalization; if the deviation value is less than zero, it indicates that the equilibrium is The body needs to be charged and balanced;
  • the equalization parameter includes at least one of a back-off value of the end of the equalization, a charging current and a length, a discharge current, and a length of the waiting period; more specifically, an equalization unit that needs to perform discharge equalization.
  • the corresponding equalization parameter may include the back-off value of the end of the equalization, the discharge current and the length of the ⁇ , and the waiting time after the discharge is stopped.
  • the corresponding equalization parameter may include the end of the equilibrium ⁇ The return difference, the charging current and the length of the battery, and the waiting time after stopping the charging;
  • the preset condition includes that the equalization deviation value of the unit that needs to perform the discharge equalization is less than the back difference value; the equalization deviation value of the unit that needs to perform the charging equalization is greater than the back difference value; that is, in step 508, if If the current cell completes the discharge equalization process, it is determined whether the balance deviation value is less than the back difference value; if the current cell is completed by the charge equalization process, it is determined whether the balance deviation value is greater than the back difference value;
  • determining the equalization parameter according to the deviation value includes:
  • the equalization parameter when the deviation value is greater than a preset maximum positive value ⁇ , the equalization parameter includes a first discharge current, a first discharge time, and a first discharge waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum positive value and less than the preset maximum positive value ⁇ , the equalization parameter includes a second discharge current, a second discharge time, and a second discharge waiting time, and The second discharge current is 1/5 of the first discharge current, the second discharge time is equal to the first discharge time, and the second discharge waiting time is the first discharge waiting time. 2 times between; [0147] when the deviation value is greater than zero and less than the preset minimum positive value ⁇ , the equalization parameter includes a third discharge current, a third discharge interval, a third discharge waiting time, and the third discharge The current is 1/20 of the first discharge current, the third discharge time is 1/2 between the first discharge turns, and the third discharge wait time is the first discharge waiting time 2 times;
  • the equalization parameter when the deviation value is less than a preset minimum negative value, includes a first charging current, a first charging time, and a first charging waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value and less than the preset maximum negative value ⁇ , the equalization parameter includes a second charging current, a second charging interval, and a second charging waiting time, and The second charging current is 1/5 of the first charging current, the second charging time is equal to the first charging time, and the second charging waiting time is the first charging waiting time. 2 times between;
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value ⁇ , the equalization parameter includes a third charging current, a third charging interval, a third charging waiting time, and the third charging The current is 1/20 of the first charging current, the third charging time is 1/2 between the first charging times, and the third charging waiting time is the first charging waiting time 2 times.
  • the preset maximum positive value may be 50mv
  • the preset minimum positive value may be 20mv
  • the preset minimum negative value may be -50mv
  • the preset maximum negative value may be -20mv.
  • the equalization parameter when the deviation value is greater than a preset maximum positive value, that is, 50mv, the equalization parameter includes:
  • the equalization parameter when the deviation value is greater than a preset minimum positive value of 20 mv and less than the preset maximum positive value of 50 mv, the equalization parameter includes:
  • the equalization parameter when the deviation value is greater than zero and less than the preset minimum positive value of 20 mv, the equalization parameter includes: [0163] a third discharge current (DDI): 50 mA;
  • the equalization parameter includes:
  • the first charging wait time (CWT) 300s;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value of -50 mv and less than the preset maximum negative value of -20 mv, the equalization parameter includes:
  • the second charging wait time (CWT) 600s;
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value -20mv ⁇ , the equalization parameter includes: [0178] second charging current (CCI): 50 mA;
  • the second charging wait time (CWT) 600s;
  • the equalization process in the present invention refers to a charging or discharging phase and a standing waiting phase; an equalizing cell may need to undergo multiple equalization processes to become a normal cell; Each time an equalization process is completed, the deviation value of the battery cell after the equalization process can be obtained; and it is determined whether it needs to perform equalization processing again; if necessary, it can be directly equalized again; or other deviations can be waited for
  • the equalization unit is subjected to equalization processing and then equalized, and the present invention does not limit this.
  • a sixth embodiment of the present invention provides a battery pack online equalization system, including an acquisition module 10, a control module 20, an equalization parameter module 30, and a charge and discharge module 40;
  • the acquisition module 10 is configured to collect a cell voltage of the battery cells in the battery pack 50;
  • the control module 20 is configured to filter out an equalization cell that needs to perform charge equalization or discharge equalization; and obtain a deviation value between the cell voltage of the equalization cell and the float voltage; generally, the deviation value is a single The difference between the voltage and the float voltage; if the deviation value is greater than zero, it indicates that the equalization unit needs to perform discharge equalization; if the deviation value is less than zero, it indicates that the equalization unit needs to perform charge equalization;
  • the equalization parameter module 30 is configured to determine an equalization parameter according to the deviation value; the equalization parameter includes a back difference value at the end of the equalization, a charging current and a length, a discharge current, and a length of the waiting period. More specifically, for an equalization cell that needs to perform discharge equalization, the corresponding equalization parameter may include a back-off value at the end of the equalization, a discharge current and a length of the ⁇ , and a wait time after the discharge is stopped; The equalization equalization unit, the corresponding equalization parameter may include the return difference of the end of the equalization, the charging current and the length of the ⁇ , and the waiting time after the charging is stopped.
  • the equalization parameter is determined by the deviation value between the cell voltage of the equalization cell and the float voltage; therefore, the equalization parameters corresponding to the equalization cells having different cell voltages are also different.
  • the charging and discharging module 40 is configured to perform equalization processing on the equalization unit according to the equalization parameter.
  • the equalization processing for the equalization unit that needs to perform charge equalization is the charge equalization processing
  • the equalization processing for the equalization unit that needs to perform the discharge equalization is the discharge equalization processing.
  • a seventh embodiment of the present invention provides a battery pack online equalization system, including an acquisition module 10, a control module 20, an equalization parameter module 30, and a charge and discharge module 40.
  • the acquisition module 10, the equalization parameter module 30, and the charge and discharge module 40 in this embodiment are the same as the acquisition module 10, the equalization parameter module 30, and the charge and discharge module 40 in the sixth embodiment, as described above. I won't go into details here.
  • control module 20 is configured to filter out equalization cells that need to perform charge equalization or discharge equalization; and acquire the cell voltage and the floating charge voltage of the equalization cell.
  • control module 20 further includes a screening unit 21, which is configured to:
  • the deviation value is greater than zero, recording a first number of times the deviation value is greater than a first preset value, and/or a second number of times the deviation value is greater than a second preset value; If the deviation value is less than zero, the third time that the deviation value is less than the third preset value is recorded, and/or the deviation value is less than the fourth number of the fourth preset value
  • the battery cell is labeled as an equalization unit
  • the above screening unit may be configured to implement steps 201 to 221 or steps 301 to 309.
  • An eighth embodiment of the present invention provides a battery pack online equalization system, including an acquisition module 10, a control module 20, an equalization parameter module 30, and a charge and discharge module 40.
  • the acquisition module 10, the equalization parameter module 30, and the charge and discharge module 40 in this embodiment are the same as the acquisition module 10, the equalization parameter module 30, and the charge and discharge module 40 in the sixth embodiment, as described above. I won't go into details here.
  • control module 20 is configured to filter out equalization cells that need to perform charge equalization or discharge equalization; and obtain the cell voltage and floating charge voltage of the equalization cell.
  • equalization process includes a charge and discharge phase and a rest wait phase, and the control module 20 further includes an equalization notification unit 22, which is configured to:
  • the charging and discharging module is notified to cause the equalization unit to be equalized to start the charging and discharging phase of the equalization process.
  • the corresponding equalization parameter includes the discharge current and the length or the charging current and the length of the ;; in the rest period, the corresponding equalization parameter includes waiting for the day after stopping the discharge or stopping the charging. Waiting for the daytime; it can be seen that the equalization parameter is determined by the deviation between the cell voltage of the equalization cell and the float voltage; therefore, the equalization parameters of the equalization cell of the cell voltage with different charging and discharging phases are The equalization parameters of the stationary waiting phase are also different.
  • the equalization unit with a large deviation can be firstly equalized first, and when the equalization unit with the larger deviation completes the equalization process, after the rest period is waiting, the equalization unit with the second largest deviation will be The equalization process is performed; that is, the equalization process can be performed by the two equalization cells; of course, the m equalization cells can be equalized first, and after the m equalization cells complete the equalization process, After being in the waiting state of rest, the new m equalization cells are equalized; the present invention does not limit the specific value of m, and all the equalizing monomers can be performed at one time when hardware conditions permit. Balance processing.
  • a ninth embodiment of the present invention provides a battery pack online equalization system, including an acquisition module 10, a control module 20, an equalization parameter module 30, and a charge and discharge module 40.
  • the equalization parameter module 30 is the same, and the control module 20 may be the same as the foregoing sixth embodiment, the seventh embodiment, or the eighth embodiment, as described above, and details are not described herein again.
  • the charging and discharging module 40 is further configured to:
  • the preset condition includes an equalization deviation value of an equalization unit that needs to perform discharge equalization is less than a back difference value; and an equilibrium deviation value of an equalization unit that needs to perform charge equalization If the current cell is completed by the discharge equalization process, it is determined whether the equilibrium deviation value is less than the back difference value; if the current cell is completed by the charge equalization process, it is determined whether the equilibrium deviation value is greater than Difference
  • the equalization unit with a large deviation may be firstly equalized, and the deviation is performed.
  • the equalization unit with the second largest deviation is equalized; that is, the equalization process can be performed by the two equalization units;
  • the m equalization units may be equalized first, and after the m equalization units complete the equalization process, after the rest period is satisfied, the new m equalization units are equalized; For m
  • the specific values are not limited. When the hardware conditions permit, all equalization units can be equalized at one time.
  • a tenth embodiment of the present invention provides a battery pack online equalization system, including an acquisition module 10, a control module 20, an equalization parameter module 30, and a charge and discharge module 40.
  • the acquisition module 10 in this embodiment is the same as the acquisition module 10 and the equalization parameter module 30 in the sixth embodiment, and the control module 20 may be the same as the sixth embodiment, the seventh embodiment, or the eighth embodiment.
  • the charging and discharging module 40 may be the same as the sixth embodiment or the ninth embodiment described above, and is specifically described above, and details are not described herein again.
  • the equalization parameter module 30 is set to:
  • the equalization parameter when the deviation value is greater than a preset maximum positive value ⁇ , the equalization parameter includes a first discharge current, a first discharge time, and a first discharge waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum positive value and less than the preset maximum positive value ⁇ , the equalization parameter includes a second discharge current, a second discharge time, and a second discharge waiting time, and The second discharge current is 1/5 of the first discharge current, the second discharge time is equal to the first discharge time, and the second discharge waiting time is the first discharge waiting time. 2 times between;
  • the equalization parameter when the deviation value is greater than zero and less than the preset minimum positive value ⁇ , the equalization parameter includes a third discharge current, a third discharge time, a third discharge waiting time, and the third discharge
  • the current is 1/20 of the first discharge current
  • the third discharge time is 1/2 between the first discharge turns
  • the third discharge wait time is the first discharge waiting time 2 times;
  • the equalization parameter when the deviation value is less than a preset minimum negative value, includes a first charging current, a first charging time, and a first charging waiting time;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value and less than the preset maximum negative value ⁇ , the equalization parameter includes a second charging current, a second charging interval, and a second charging waiting time, and The second charging current is 1/5 of the first charging current, the second charging time is equal to the first charging time, and the second charging waiting time is the first charging waiting time. 2 times between;
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value ⁇ , the equalization parameter includes a third charging current, a third charging interval, a third charging waiting time, and the third charging The current is 1/20 of the first charging current, and the third charging time is 1/2 between the first charging turns, the third charging, etc. Waiting for the first charge is twice as long as the first charge.
  • the preset maximum positive value may be 50mv
  • the preset minimum positive value may be 2
  • the preset minimum negative value can be -50mv
  • the preset maximum negative value can be -20mv.
  • the equalization parameter when the deviation value is greater than a preset maximum positive value, that is, 50mv, the equalization parameter includes:
  • the equalization parameter when the deviation value is greater than a preset minimum positive value of 20 mv and less than the preset maximum positive value of 50 mv, the equalization parameter includes:
  • the equalization parameter when the deviation value is greater than zero and less than the preset minimum positive value 20mv ⁇ , the equalization parameter includes:
  • the equalization parameter includes:
  • the first charging wait time (CWT) 300s;
  • the equalization parameter when the deviation value is greater than a preset minimum negative value of -50 mv and less than the preset maximum negative value -20 mv ⁇ , the equalization parameter includes:
  • the equalization parameter when the deviation value is less than zero and less than the preset maximum negative value -20mv ⁇ , the equalization parameter includes: [0251] second charging current (CCI): 50 mA;
  • the second charging wait time (CWT) 600s;
  • the battery pack online equalization method and system thereof perform on-line maintenance of the battery cells without manual intervention, and intelligently determine the start and stop equalization operations without affecting the normal operation of the original system.
  • the battery pack online equalization method and system thereof collect battery cells by the acquisition module Basic data such as pressure, temperature, and float voltage are sent to the control module.
  • the control module analyzes the basic data, obtains matching equalization parameters from the equalization parameter module according to the selected battery cell condition, and then performs equalization through the charging and discharging module. Charge or equalize discharge.
  • the acquisition module will collect and monitor the battery status and report it to the control module. If an abnormality occurs or the equilibrium end condition is reached, the equalization maintenance will be stopped immediately.
  • the invention can perform on-line maintenance on the battery unit without intelligent intervention, intelligently judges the start and stop of the equalization operation, and does not affect the normal operation of the original system; and the online maintenance is easily affected by the UPS/gate power supply to the battery pack floating charge
  • the battery cell is balanced, and it is easy to set the return difference when the voltage is false or high.
  • After the intelligent equalization maintenance after the actual whole group of large current discharge, there is no short battery of a battery cell. . Therefore, it has industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un procédé d'égalisation en ligne pour un bloc-batterie et un système associé. Le procédé consiste : à obtenir une tension de cellule d'une cellule de batterie dans un bloc-batterie, et à filtrer une cellule d'égalisation nécessitant une égalisation de charge ou une égalisation de décharge ; à acquérir un écart de la tension de cellule de la cellule d'égalisation à partir d'une tension de charge flottante ; à déterminer, en fonction de l'écart, des paramètres d'égalisation, les paramètres d'égalisation comprenant au moins un des éléments suivants : une valeur de différence de retour à la fin de l'égalisation, un courant de charge et un temps de charge, un courant de décharge et un temps de décharge, et un temps d'attente ; et à effectuer, en fonction des paramètres d'égalisation, un traitement d'égalisation sur la cellule d'égalisation. La présente invention peut effectuer une maintenance en ligne sur une cellule de batterie sans intervention manuelle, et procéder à une détermination intelligente sur le démarrage et l'arrêt d'une opération d'égalisation sans affecter un fonctionnement normal d'un système d'origine.
PCT/CN2017/079528 2017-04-06 2017-04-06 Procédé d'égalisation en ligne pour bloc-batterie et système associé Ceased WO2018184160A1 (fr)

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CN201780002683.6A CN108702005B (zh) 2017-04-06 2017-04-06 一种蓄电池组在线均衡方法及其系统

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111864844A (zh) * 2020-07-27 2020-10-30 中航锂电（洛阳）有限公司 电池系统的均衡方法、均衡装置及智能设备
CN112072727A (zh) * 2020-08-03 2020-12-11 合肥工业大学 一种电池组均衡控制系统及其控制方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109274160A (zh) * 2018-11-28 2019-01-25 中车株洲电力机车有限公司 一种蓄电池均衡方法、系统及轨道交通车辆
CN112688386A (zh) * 2020-12-16 2021-04-20 珠海格力电器股份有限公司 均衡控制方法、装置、设备、存储介质和电源系统
CN112994186A (zh) * 2021-04-23 2021-06-18 中国铁塔股份有限公司 供电电路和供电电路的控制方法
CN113922437B (zh) * 2021-08-18 2024-01-23 国网浙江省电力有限公司温州供电公司 可远程控制的锂电池无环流管理方法、装置及电子设备
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070063673A1 (en) * 2003-08-21 2007-03-22 Dehaan James M Method and device for equalizing the float voltage of a battery cell
CN102437603A (zh) * 2011-10-25 2012-05-02 重庆长安汽车股份有限公司 一种锂电池管理系统均衡控制方法
CN103066650A (zh) * 2012-12-18 2013-04-24 上海电机学院 变浆系统后备电池在线监测及电压均衡系统以及方法
CN202949016U (zh) * 2012-10-23 2013-05-22 江苏省电力公司苏州供电公司 蓄电池在线维护电路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201307771Y (zh) * 2007-11-22 2009-09-09 威海科益达电子有限公司 大容量锂离子电池串联组合保护均衡模块

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070063673A1 (en) * 2003-08-21 2007-03-22 Dehaan James M Method and device for equalizing the float voltage of a battery cell
CN102437603A (zh) * 2011-10-25 2012-05-02 重庆长安汽车股份有限公司 一种锂电池管理系统均衡控制方法
CN202949016U (zh) * 2012-10-23 2013-05-22 江苏省电力公司苏州供电公司 蓄电池在线维护电路
CN103066650A (zh) * 2012-12-18 2013-04-24 上海电机学院 变浆系统后备电池在线监测及电压均衡系统以及方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111864844A (zh) * 2020-07-27 2020-10-30 中航锂电（洛阳）有限公司 电池系统的均衡方法、均衡装置及智能设备
CN112072727A (zh) * 2020-08-03 2020-12-11 合肥工业大学 一种电池组均衡控制系统及其控制方法

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