CN111817402A - Method and device for thermal runaway safety management of full-state battery - Google Patents
Method and device for thermal runaway safety management of full-state battery Download PDFInfo
- Publication number
- CN111817402A CN111817402A CN202010734052.7A CN202010734052A CN111817402A CN 111817402 A CN111817402 A CN 111817402A CN 202010734052 A CN202010734052 A CN 202010734052A CN 111817402 A CN111817402 A CN 111817402A
- Authority
- CN
- China
- Prior art keywords
- loop
- battery
- protector
- temperature
- constant
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract description 11
- 230000001012 protector Effects 0.000 claims abstract description 97
- 238000001514 detection method Methods 0.000 claims abstract description 54
- 238000010277 constant-current charging Methods 0.000 claims abstract description 43
- 238000010280 constant potential charging Methods 0.000 claims abstract description 42
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000007600 charging Methods 0.000 claims abstract description 16
- 230000000630 rising effect Effects 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 13
- 208000028659 discharge Diseases 0.000 claims description 12
- 238000007726 management method Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 4
- 239000000779 smoke Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or 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
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- 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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A method and a device for thermal runaway safety management of an all-state battery relate to the technical field of power electronics. The invention is composed of a basic data memory, a loop detection module, a loop state judger, a threshold value setter, a thermal runaway protector, an early warning module and a loop cut-off warning module; the thermal runaway protector consists of a constant current charging protector, a constant voltage charging protector, a discharging state protector and a standing state protector; the realization of the invention subdivides the charging and discharging cycle of the battery, and distinguishes the alarm and the early warning, the thermal runaway early warning can judge whether the trend of the thermal runaway exists or not at the earliest time when the temperature reaches 60 percent of the thermal runaway alarm temperature, and sends out the early warning.
Description
Technical Field
The invention relates to the technical field of power electronics.
Background
The thermal runaway of the battery refers to the cumulative enhancement of the current and the temperature of the battery during constant-voltage charging and the gradual damage of the battery. After the battery reaches a certain temperature, the battery is uncontrollable, the temperature rises linearly, and then the battery can be combusted and exploded. Overheating, overcharging, internal short circuit, collision and the like are a plurality of key factors for triggering thermal runaway of the power battery.
Thermal runaway caused by short circuits is divided into thermal runaway caused by external short circuits and thermal runaway caused by internal short circuits. Boeing 787 passenger aircraft have been on fire due to battery explosion. When the accident cause is found, the metal objects are found on the electrode and the diaphragm, and an internal short circuit is generated. Although the expert cannot confirm 100% that thermal runaway is triggered by an internal short circuit, it is the most likely cause because no other cause can be found.
The cause of the pure electric bus fire event is 'overcharge-triggered thermal runaway', in particular, the loss of the circuit safety function of the battery management system for overcharge, so that the BMS of the battery is out of control and is still charged.
At present, there is no absolutely reliable method for avoiding the occurrence of thermal runaway and the spread of thermal runaway in a battery system, and therefore, in order to reduce the damage of thermal runaway, it is necessary to make a warning of thermal runaway before the occurrence of thermal runaway.
Chinese invention patent application no: CN2020101241848, patent name: a thermal runaway early warning method, device and system for a power storage battery of an electric vehicle is disclosed, wherein air pressure data in a storage battery pack is obtained; when the air pressure data is abnormal, sending a verification request to a battery management system to obtain data to be verified in the storage battery pack; and when the data to be verified meet the preset conditions, sending a thermal runaway alarm signal to the whole vehicle. The implementation of the patent needs to measure the amount of gas released after thermal runaway of the used storage battery in advance, and measure the volume of the gas carried by the sealed space where the battery is located, so that the gas pressure can be used as an alarm condition of the thermal runaway.
Chinese invention patent application No. CN2020100634977, patent name: the system comprises a vehicle control unit and a battery pack, wherein the battery pack comprises a battery core, a flexible circuit board and an explosion-proof valve, the flexible circuit board is arranged on the explosion-proof valve, the flexible circuit board comprises a first detection circuit and a second detection circuit, and the method comprises the following steps: acquiring state information of a battery; comparing the state information with each preset judging condition to obtain a first comparison result and generate first prompt information or second prompt information; when the battery is in an abnormal working state, acquiring a first voltage value of a first detection loop and a second voltage value of a second detection loop; when the first voltage value and the second voltage value are not smaller than the first preset value, third prompt information is displayed and used for prompting that the battery is in a thermal runaway state; according to the method, the thermal runaway state of the battery is judged in a multi-stage mode by the flexible circuit board which is pressed by pressure at the battery expansion stage to be connected so as to send a signal, the method is a detection method, but the expansion of the battery represents that the thermal runaway has occurred, and the purpose of early warning cannot be achieved.
Chinese patent application No. CN202010059835X, patent name: the patent collects the gas type and gas concentration information released inside the battery in real time, outputs a voltage signal representing the gas concentration information, and uses the released gas concentration to perform thermal runaway alarm, so that not only the gas phase composition of the released gas after thermal runaway of various batteries needs to be known, but also the thermal runaway can be represented by the fact that a certain concentration is reached, and early warning cannot be performed.
Chinese invention patent application No. CN 20192237421, patent name: the patent adopts a sensor device to monitor the overheated battery in the battery, and the sensor device adopts a specially-made flexible film sensor; and similarly, an alarm is given by utilizing the principle that the battery expands after thermal runaway, and early warning cannot be finished.
Chinese invention patent application No. CN2019112170133, patent name: the patent is based on three-level early warning of temperature, smoke and characteristic gas detection, the temperature of the patent can be used as early warning, the smoke and the characteristic gas belong to the category of after-the-fact warning, but the temperature value early warning is not as sensitive and effective as the acceleration value early warning of the temperature, the temperature reaches the early warning value, the thermal runaway of the battery becomes the current situation, but the temperature early warning is improved compared with the pressure early warning and the smoke early warning.
Chinese patent application No. CN201911128270X, patent name: the patent uses pressure detection devices arranged at two ends of a battery module to be monitored and a charging switch arranged in a charging loop of the battery module to be monitored, and is also a pressure early warning technology.
The method and the technology for carrying out effective thermal runaway safety management on the whole states of a battery charging link, a battery discharging link and a battery standing link are lacked, the main reason that the links where the batteries are not distinguished in the prior art is that early warning on thermal runaway is stopped in the future, and the early warning on the thermal runaway needs to be carried out by dividing the service cycle of the batteries into a charging cycle, a discharging cycle and a standing cycle and dividing the charging cycle into a constant voltage charging cycle and a constant current charging cycle to adopt distinguished early warning management if an alarm signal is given out to give an alarm signal to carry out the early warning on the thermal runaway in advance before the thermal runaway occurs.
Disclosure of Invention
In view of the defects of the prior art, the method and the device for realizing the thermal runaway safety management of the full-state battery are composed of a basic data memory, a loop detection module, a loop state judger, a threshold value setter, a thermal runaway protector, an early warning module and a loop cut-off warning module; the thermal runaway protector consists of a constant current charging protector, a constant voltage charging protector, a discharging state protector and a standing state protector;
the basic data storage is used for storing system configuration parameters, and the system configuration parameters comprise: constant-current charging current-limiting points, constant-voltage charging voltage and the number of single batteries in a loop; the constant-current charging current-limiting point is the maximum current during constant-current charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the constant voltage charging voltage is the stable charging voltage from the constant current charging to the constant voltage charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the number of the single batteries in the loop is the number of all the batteries participating in charging and discharging in the whole loop, and is determined when a system is built and written into a basic data memory;
a loop current collector of the loop detection module collects a loop current value, the charging current is a positive value, and the discharging current is a negative value; a loop voltage collector of the loop detection module collects a loop voltage value;
the loop state determiner is responsible for determining the state of the loop: when the current value of the loop is a positive value and is within the detection precision range of the constant current charging current limiting point, the loop state judger judges that the loop state is a constant current charging stage at the moment, and informs the constant current charging stage signal to the thermal runaway protector; when the loop current is a positive value, is out of the detection precision range of the constant-current charging current limiting point and the loop voltage value is within the detection precision range of the constant-voltage charging voltage, the loop state determiner determines that the loop state is a constant-voltage charging stage at the moment and informs the constant-voltage charging stage to the thermal runaway protector; when the loop current value is a negative value, the loop state judger judges that the loop state is a discharging stage at the moment, and informs the discharging stage signal to the thermal runaway protector; when the loop current value is zero, the loop state judger judges that the loop state is a standing stage at the moment, and informs the standing stage signal to the thermal runaway protector;
setting a loop cut-off threshold by a threshold setter according to a thermal runaway temperature threshold given by a battery manufacturer multiplied by 90 percent; setting a first alarm threshold value, a second alarm threshold value and a third alarm threshold value by a threshold value setter; the first alarm threshold is selected to be in the range of 80 percent to 89 percent of the thermal runaway temperature threshold given by the battery manufacturer; the second warning threshold is selected to be in the range of 70 percent to 79 percent of the thermal runaway temperature threshold given by the battery manufacturer; the third warning threshold is selected in the range of 60 to 69 percent of the thermal runaway temperature threshold given by the battery manufacturer; setting a temperature rise rate threshold value when the single battery is normally charged by a threshold value setter, wherein the temperature rise rate is the integral of temperature and time; setting a temperature acceleration threshold value when the single battery is normally charged by a threshold value setter, wherein the temperature acceleration is the integral of the temperature rising rate to the time;
the thermal runaway protector receives the constant current charging stage signal, the battery temperature collected by the battery temperature collector of the detection module of the constant current charging protector is detected by the detection unit of the constant current charging protector, and when the battery temperature reaches a loop cut-off threshold value, the constant current charging protector informs a loop cut-off alarm module to send an alarm signal and cut off the loop; when the temperature of the battery reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector is higher than five percent of the average voltage of the single battery in the loop, the constant-current charging protector informs the early warning module to send out an early warning signal, and the average voltage of the single battery is obtained by dividing the loop voltage value collected by the loop voltage collector by the number of the single battery in the loop;
when the battery temperature reaches a circuit cut-off threshold value, the constant-voltage charging protector informs a circuit cut-off alarm module to send an alarm signal and cut off a circuit; the constant-voltage charging protector detects a loop current value acquired by the loop current collector, integrates the loop current value with time, and informs the early warning module to send out an early warning signal when the time integral value of the loop current value is continuously increased, so that the set range of the continuously increased time period is judged to be 2-10 minutes; the constant-voltage charging protector detection unit detects the battery temperature collected by a battery temperature collector of the module, and when the battery temperature is higher than a second alarm threshold value and the battery temperature rising rate is higher than a temperature rising rate threshold value, the constant-voltage charging protector informs the early warning module to send out an early warning signal; when the temperature of the battery is higher than a third alarm threshold value and the temperature acceleration of the temperature rise of the battery is greater than a temperature acceleration threshold value, the constant-voltage charging protector informs the early warning module to send out an early warning signal;
the thermal runaway protector receives the discharge stage signal, the battery temperature collected by the battery temperature collector of the discharge state protector detection unit detection module, and when the battery temperature reaches a loop cut-off threshold value, the discharge state protector informs the loop cut-off alarm module to send an alarm signal and cut off the loop; when the temperature of the battery reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector is higher than five percent of the average voltage of the single body of the loop, the discharge state protector informs the early warning module to send out an early warning signal;
the thermal runaway protector receives the signal of the standing stage, the battery temperature collected by a battery temperature collector of the detection module of the standing state protector is detected by the detection unit of the standing state protector, and when the battery temperature reaches a loop cut-off threshold value, the standing state protector informs a loop cut-off alarm module to send an alarm signal and cut off the loop; the static state protector collects the ambient temperature, and when the rising speed of the battery temperature collected by the battery temperature collector is greater than the rising speed of the ambient temperature, the static state protector informs the early warning module to send out an early warning signal.
Advantageous effects
The realization of the invention subdivides the charging and discharging cycle of the battery, and distinguishes the alarm and the early warning, the thermal runaway early warning can judge whether the trend of the thermal runaway exists or not at the earliest when the temperature reaches 60 percent of the thermal runaway alarm temperature, and the early warning is given out.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a loop detection module according to the present invention;
FIG. 3 is a schematic diagram of a unit detection module according to the present invention.
Detailed Description
Referring to fig. 1 to 3, the method and apparatus for implementing the thermal runaway safety management of the full-state battery according to the present invention is composed of a basic data storage 1, a loop detection module 2, a loop state determiner 3, a threshold setter 4, a thermal runaway protector 5, an early warning module 6, and a loop cut-off warning module 7; the thermal runaway protector 5 consists of a constant current charging protector 50, a constant voltage charging protector 51, a discharging state protector 52 and a standing state protector 53;
the basic data storage 1 is used to store system configuration parameters, which include: constant-current charging current-limiting points, constant-voltage charging voltage and the number of single batteries in a loop; the constant-current charging current-limiting point is the maximum current during constant-current charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the constant voltage charging voltage is the stable charging voltage from the constant current charging to the constant voltage charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the number of the single batteries in the loop is the number of all the batteries participating in charging and discharging in the whole loop, and is determined when a system is built and written into a basic data memory;
a loop current collector 20 of the loop detection module 2 collects a loop current value, the charging current is a positive value, and the discharging current is a negative value; a loop voltage collector 21 of the loop detection module 2 collects a loop voltage value;
the loop state determiner 3 is responsible for determining the state of the loop: when the loop current value is a positive value and is within the detection precision range of the constant current charging current limiting point, the loop state judger 3 judges that the loop state is a constant current charging stage at the moment, and informs the thermal runaway protector 5 of a signal of the constant current charging stage; when the loop current is a positive value, is out of the detection precision range of the constant-current charging current-limiting point and the loop voltage value is within the detection precision range of the constant-voltage charging voltage, the loop state determiner 3 determines that the loop state is a constant-voltage charging stage at the moment and informs the constant-voltage charging stage to the thermal runaway protector 5; when the loop current value is a negative value, the loop state determiner 3 determines that the loop state is a discharging stage at the moment, and informs the thermal runaway protector 5 of a discharging stage signal; when the loop current value is zero, the loop state judger 3 judges that the loop state is a standing stage at the moment, and informs the standing stage signal to the thermal runaway protector 5;
the loop cut-off threshold is set by the threshold setter 4 according to the thermal runaway temperature threshold given by the battery manufacturer multiplied by 90 percent; a threshold value setter 4 sets a first alarm threshold value, a second alarm threshold value and a third alarm threshold value; the first alarm threshold is selected to be in the range of 80 percent to 89 percent of the thermal runaway temperature threshold given by the battery manufacturer; the second warning threshold is selected to be in the range of 70 percent to 79 percent of the thermal runaway temperature threshold given by the battery manufacturer; the third warning threshold is selected in the range of 60 to 69 percent of the thermal runaway temperature threshold given by the battery manufacturer; the threshold value setter 4 sets a temperature rise rate threshold value when the single battery is normally charged, wherein the temperature rise rate is the integral of temperature and time; a threshold value setter 4 sets a temperature acceleration threshold value when the single battery is normally charged, wherein the temperature acceleration is the integral of the temperature rising rate to the time;
the thermal runaway protector 5 receives the constant current charging stage signal, the battery temperature collected by the battery temperature collector 82 of the detection module 8 of the constant current charging protector 50 detection unit, when the battery temperature reaches the loop cut-off threshold, the constant current charging protector 50 informs the loop cut-off alarm module 7 to send out an alarm signal, and cuts off the loop; when the battery temperature reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector 80 is higher than five percent of the average voltage of the single battery in the loop, the constant-current charging protector 50 informs the early warning module 6 to send out an early warning signal, and the average voltage of the single battery is obtained by dividing the loop voltage value collected by the loop voltage collector 20 by the number of the single battery in the loop;
when the thermal runaway protector 5 receives the constant voltage charging stage signal, the constant voltage charging protector 51 detects the battery temperature collected by the battery temperature collector 82 of the module 8, and when the battery temperature reaches the loop cut-off threshold, the constant voltage charging protector 51 informs the loop cut-off alarm module 7 to send an alarm signal and cut off the loop; the constant voltage charging protector 51 detects a loop current value acquired by the loop current collector 21, integrates the loop current value with time, and when a time integral value of the loop current value continuously increases, the constant voltage charging protector 51 informs the early warning module 6 to send out an early warning signal, and judges that a set range of a continuously increasing time period is 2 minutes to 10 minutes; the constant voltage charging protector 51 detects the battery temperature collected by the battery temperature collector 82 of the module 8, and when the battery temperature is higher than a second alarm threshold and the battery temperature rising rate is higher than a temperature rising rate threshold, the constant voltage charging protector 51 informs the early warning module 6 to send an early warning signal; when the battery temperature is higher than the third warning threshold and the temperature acceleration of the battery temperature rise is greater than the temperature acceleration threshold, the constant-voltage charging protector 51 informs the early warning module 6 to send out an early warning signal;
the thermal runaway protector 5 receives the discharge stage signal, the battery temperature collected by the battery temperature collector 82 of the detection unit detection module 8 of the discharge state protector 52, when the battery temperature reaches the loop cut-off threshold, the discharge state protector 52 informs the loop cut-off alarm module 7 to send an alarm signal, and cuts off the loop; when the battery temperature reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector 80 is higher than five percent of the average voltage of the single loop, the discharge state protector 52 informs the early warning module 6 to send out an early warning signal;
when the thermal runaway protector 5 receives the signal of the standing stage, the battery temperature collector 82 of the detection module 8 of the detection unit of the standing state protector 53 detects the battery temperature, and when the battery temperature reaches the loop cut-off threshold, the standing state protector 53 informs the loop cut-off alarm module 7 to send out an alarm signal and cut off the loop; the static state protector 53 collects the ambient temperature, and when the rising speed of the battery temperature collected by the battery temperature collector 82 is greater than the rising speed of the ambient temperature, the static state protector 53 notifies the early warning module 6 to send out an early warning signal.
Claims (2)
1. A device for the thermal runaway safety management of an all-state battery is characterized by consisting of a basic data memory, a loop detection module, a loop state judger, a threshold value setter, a thermal runaway protector, an early warning module and a loop cut-off warning module; the thermal runaway protector consists of a constant current charging protector, a constant voltage charging protector, a discharging state protector and a standing state protector;
the basic data storage is used for storing system configuration parameters, and the system configuration parameters comprise: constant-current charging current-limiting points, constant-voltage charging voltage and the number of single batteries in a loop; the constant-current charging current-limiting point is the maximum current during constant-current charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the constant voltage charging voltage is the stable charging voltage from the constant current charging to the constant voltage charging, is provided by a battery manufacturer, and simultaneously provides a detection precision range; the number of the single batteries in the loop is the number of all the batteries participating in charging and discharging in the whole loop, and is determined when a system is built and written into a basic data memory;
a loop current collector of the loop detection module collects a loop current value, the charging current is a positive value, and the discharging current is a negative value; a loop voltage collector of the loop detection module collects a loop voltage value;
the loop state determiner is responsible for determining the state of the loop: when the current value of the loop is a positive value and is within the detection precision range of the constant current charging current limiting point, the loop state judger judges that the loop state is a constant current charging stage at the moment, and informs the constant current charging stage signal to the thermal runaway protector; when the loop current is a positive value, is out of the detection precision range of the constant-current charging current limiting point and the loop voltage value is within the detection precision range of the constant-voltage charging voltage, the loop state determiner determines that the loop state is a constant-voltage charging stage at the moment and informs the constant-voltage charging stage to the thermal runaway protector; when the loop current value is a negative value, the loop state judger judges that the loop state is a discharging stage at the moment, and informs the discharging stage signal to the thermal runaway protector; when the loop current value is zero, the loop state judger judges that the loop state is a standing stage at the moment, and informs the standing stage signal to the thermal runaway protector;
a threshold value setter sets a loop cut-off threshold value, a first alarm threshold value, a second alarm threshold value and a third alarm threshold value; setting a temperature rise rate threshold value when the single battery is normally charged by a threshold value setter, wherein the temperature rise rate is the integral of temperature and time; setting a temperature acceleration threshold value when the single battery is normally charged by a threshold value setter, wherein the temperature acceleration is the integral of the temperature rising rate to the time;
the thermal runaway protector receives the constant current charging stage signal, the battery temperature collected by the battery temperature collector of the detection module of the constant current charging protector is detected by the detection unit of the constant current charging protector, and when the battery temperature reaches a loop cut-off threshold value, the constant current charging protector informs a loop cut-off alarm module to send an alarm signal and cut off the loop; when the temperature of the battery reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector is higher than five percent of the average voltage of the single battery in the loop, the constant-current charging protector informs the early warning module to send out an early warning signal, and the average voltage of the single battery is obtained by dividing the loop voltage value collected by the loop voltage collector by the number of the single battery in the loop;
when the battery temperature reaches a circuit cut-off threshold value, the constant-voltage charging protector informs a circuit cut-off alarm module to send an alarm signal and cut off a circuit; the constant-voltage charging protector detects a loop current value acquired by the loop current collector, integrates the loop current value with time, and informs the early warning module to send out an early warning signal when the time integral value of the loop current value is continuously increased, so that the set range of the continuously increased time period is judged to be 2-10 minutes; the constant-voltage charging protector detection unit detects the battery temperature collected by a battery temperature collector of the module, and when the battery temperature is higher than a second alarm threshold value and the battery temperature rising rate is higher than a temperature rising rate threshold value, the constant-voltage charging protector informs the early warning module to send out an early warning signal; when the temperature of the battery is higher than a third alarm threshold value and the temperature acceleration of the temperature rise of the battery is greater than a temperature acceleration threshold value, the constant-voltage charging protector informs the early warning module to send out an early warning signal;
the thermal runaway protector receives the discharge stage signal, the battery temperature collected by the battery temperature collector of the discharge state protector detection unit detection module, and when the battery temperature reaches a loop cut-off threshold value, the discharge state protector informs the loop cut-off alarm module to send an alarm signal and cut off the loop; when the temperature of the battery reaches a first alarm threshold value and the battery voltage collected by the battery voltage collector is higher than five percent of the average voltage of the single body of the loop, the discharge state protector informs the early warning module to send out an early warning signal;
the thermal runaway protector receives the signal of the standing stage, the battery temperature collected by a battery temperature collector of the detection module of the standing state protector is detected by the detection unit of the standing state protector, and when the battery temperature reaches a loop cut-off threshold value, the standing state protector informs a loop cut-off alarm module to send an alarm signal and cut off the loop; the static state protector collects the ambient temperature, and when the rising speed of the battery temperature collected by the battery temperature collector is greater than the rising speed of the ambient temperature, the static state protector informs the early warning module to send out an early warning signal.
2. The apparatus for safety management of thermal runaway of a state-full battery according to claim 1, wherein the threshold setter sets the loop cutoff threshold according to a thermal runaway temperature threshold given by a battery manufacturer multiplied by 90 percent; setting a first alarm threshold value, a second alarm threshold value and a third alarm threshold value by a threshold value setter; the first alarm threshold is selected to be in the range of 80 percent to 89 percent of the thermal runaway temperature threshold given by the battery manufacturer; the second warning threshold is selected to be in the range of 70 percent to 79 percent of the thermal runaway temperature threshold given by the battery manufacturer; the third warning threshold is selected to be in the range of 60 percent to 69 percent of the thermal runaway temperature threshold given by the battery manufacturer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010734052.7A CN111817402B (en) | 2020-07-28 | 2020-07-28 | Method and device for thermal runaway safety management of full-state battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010734052.7A CN111817402B (en) | 2020-07-28 | 2020-07-28 | Method and device for thermal runaway safety management of full-state battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111817402A true CN111817402A (en) | 2020-10-23 |
| CN111817402B CN111817402B (en) | 2024-05-31 |
Family
ID=72862765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010734052.7A Active CN111817402B (en) | 2020-07-28 | 2020-07-28 | Method and device for thermal runaway safety management of full-state battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111817402B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363061A (en) * | 2020-11-11 | 2021-02-12 | 上海电享信息科技有限公司 | Thermal runaway risk assessment method based on big data |
| CN114179617A (en) * | 2021-12-10 | 2022-03-15 | 山东爱德邦智能科技有限公司 | Battery spontaneous combustion control method and device and medium thereof |
| CN116404677A (en) * | 2023-04-23 | 2023-07-07 | 杭州施福宁能源科技有限公司 | Management system of electric power energy storage system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105904992A (en) * | 2016-06-07 | 2016-08-31 | 烟台创为新能源科技有限公司 | Electric vehicle battery monitoring and management system and monitoring method of batteries |
| CN106066457A (en) * | 2016-05-25 | 2016-11-02 | 烟台创为新能源科技有限公司 | A kind of battery thermal runaway detecting system and detection method thereof |
| JP2017103077A (en) * | 2015-12-01 | 2017-06-08 | 日立化成株式会社 | Power storage system and control method thereof, and device and method for diagnosing sign of thermorunaway of lithium ion secondary battery |
| DE202017103776U1 (en) * | 2016-07-22 | 2017-11-14 | Beihang University | Device for automatic warning against thermal runaway of traction batteries |
| CN108711893A (en) * | 2018-04-08 | 2018-10-26 | 江西优特汽车技术有限公司 | A kind of power battery thermal runaway early warning system and method |
| CN109786872A (en) * | 2019-03-18 | 2019-05-21 | 北京航空航天大学 | A kind of lithium ion battery thermal runaway early warning system and method |
| CN110311179A (en) * | 2019-05-31 | 2019-10-08 | 国电南瑞科技股份有限公司 | A kind of method of energy storage battery system intelligent early-warning |
| CN110350258A (en) * | 2019-06-17 | 2019-10-18 | 广东恒翼能科技有限公司 | A kind of lithium battery thermal runaway early warning protection system and method |
| CN110361654A (en) * | 2019-05-31 | 2019-10-22 | 中兴通讯股份有限公司 | A kind of monitoring method of thermal runaway, device and equipment |
| CN110828919A (en) * | 2019-11-18 | 2020-02-21 | 北京理工大学 | Battery thermal runaway early warning system and method |
| CN110911772A (en) * | 2019-12-03 | 2020-03-24 | 中国科学技术大学 | Early warning method for thermal runaway of power lithium ion battery |
| CN110957542A (en) * | 2019-04-30 | 2020-04-03 | 宁德时代新能源科技股份有限公司 | Battery thermal runaway detection method, device and system and battery management unit |
-
2020
- 2020-07-28 CN CN202010734052.7A patent/CN111817402B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017103077A (en) * | 2015-12-01 | 2017-06-08 | 日立化成株式会社 | Power storage system and control method thereof, and device and method for diagnosing sign of thermorunaway of lithium ion secondary battery |
| CN106066457A (en) * | 2016-05-25 | 2016-11-02 | 烟台创为新能源科技有限公司 | A kind of battery thermal runaway detecting system and detection method thereof |
| CN105904992A (en) * | 2016-06-07 | 2016-08-31 | 烟台创为新能源科技有限公司 | Electric vehicle battery monitoring and management system and monitoring method of batteries |
| DE202017103776U1 (en) * | 2016-07-22 | 2017-11-14 | Beihang University | Device for automatic warning against thermal runaway of traction batteries |
| CN108711893A (en) * | 2018-04-08 | 2018-10-26 | 江西优特汽车技术有限公司 | A kind of power battery thermal runaway early warning system and method |
| CN109786872A (en) * | 2019-03-18 | 2019-05-21 | 北京航空航天大学 | A kind of lithium ion battery thermal runaway early warning system and method |
| CN110957542A (en) * | 2019-04-30 | 2020-04-03 | 宁德时代新能源科技股份有限公司 | Battery thermal runaway detection method, device and system and battery management unit |
| CN110311179A (en) * | 2019-05-31 | 2019-10-08 | 国电南瑞科技股份有限公司 | A kind of method of energy storage battery system intelligent early-warning |
| CN110361654A (en) * | 2019-05-31 | 2019-10-22 | 中兴通讯股份有限公司 | A kind of monitoring method of thermal runaway, device and equipment |
| CN110350258A (en) * | 2019-06-17 | 2019-10-18 | 广东恒翼能科技有限公司 | A kind of lithium battery thermal runaway early warning protection system and method |
| CN110828919A (en) * | 2019-11-18 | 2020-02-21 | 北京理工大学 | Battery thermal runaway early warning system and method |
| CN110911772A (en) * | 2019-12-03 | 2020-03-24 | 中国科学技术大学 | Early warning method for thermal runaway of power lithium ion battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363061A (en) * | 2020-11-11 | 2021-02-12 | 上海电享信息科技有限公司 | Thermal runaway risk assessment method based on big data |
| CN114179617A (en) * | 2021-12-10 | 2022-03-15 | 山东爱德邦智能科技有限公司 | Battery spontaneous combustion control method and device and medium thereof |
| CN116404677A (en) * | 2023-04-23 | 2023-07-07 | 杭州施福宁能源科技有限公司 | Management system of electric power energy storage system |
| CN116404677B (en) * | 2023-04-23 | 2023-10-27 | 杭州施福宁能源科技有限公司 | Management system of electric power energy storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111817402B (en) | 2024-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111817402A (en) | Method and device for thermal runaway safety management of full-state battery | |
| CN110943261B (en) | Thermal runaway monitoring device and method for power lithium ion battery pack | |
| JP3327790B2 (en) | Battery protection device | |
| KR101003444B1 (en) | Lithium-ion battery alarm protection apparatus and method | |
| CN105589046A (en) | Detection and alarm method of power battery pack thermal runaway diffusion | |
| CN104808152B (en) | The system and method that accumulator status information is determined based on internal battery pressure | |
| CN1130789C (en) | Apparatus for simulating high battery temp. for rechargeable battery systems | |
| CN103085669A (en) | Automatic crash battery discharge method | |
| CN108445343B (en) | Power battery internal short circuit detection method and system | |
| CN113253119A (en) | Battery burst type thermal runaway monitoring method and device and readable storage medium | |
| CN108832686B (en) | Charging circuit and charging circuit detection method | |
| CN109795323A (en) | A kind of guard method of the battery pack of electric car and device | |
| CN110341483A (en) | A kind of detection system and detection method of electric vehicle motor controller | |
| CN117388725A (en) | Early abnormality early warning method based on expansion force of lithium ion battery | |
| CN101478169A (en) | Lithium battery pre-alarm protection apparatus and method thereof | |
| US11973364B2 (en) | Circuit control method, battery and its controller and management system, and electrical apparatus | |
| US10629964B2 (en) | Method for operating an energy storage unit, battery management system for performing such a method and energy storage unit with such a battery management system | |
| JPH1141823A (en) | Overcharging prevention device | |
| CN106025404A (en) | Internal short circuit warning detection method for lithium ion rechargeable batteries | |
| CN109586359A (en) | Over-charging of battery method for early warning and device | |
| JP2000340266A (en) | Abnormality detection in using battery in parallel | |
| US11865925B2 (en) | Method for operating an electric energy store, electric energy store, and device | |
| KR102265844B1 (en) | Method and apparatus for impact protection of battery pack | |
| CN116885310A (en) | Electric bicycle lithium ion power battery thermal runaway monitoring system | |
| CN111668901A (en) | Battery protection circuit, battery management system, battery device and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |