CN112310491B - Lithium battery thermal-safety management system and management and control method - Google Patents
Lithium battery thermal-safety management system and management and control method Download PDFInfo
- Publication number
- CN112310491B CN112310491B CN201910673309.XA CN201910673309A CN112310491B CN 112310491 B CN112310491 B CN 112310491B CN 201910673309 A CN201910673309 A CN 201910673309A CN 112310491 B CN112310491 B CN 112310491B
- Authority
- CN
- China
- Prior art keywords
- battery
- thermal
- safety
- safety management
- working medium
- 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.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lithium battery thermal-safety management system and a management and control method, wherein the lithium battery thermal-safety management system comprises a water pump, a thermal-safety management system, a battery management system, an energy storage converter, an in-box total monitor, a plurality of battery modules and a water chiller; a liquid cooling channel is laid on the surface of the battery module; the water pump is communicated with the water chiller through a liquid cooling channel to form a closed loop, an electromagnetic proportional valve is arranged on the liquid cooling channel, and the battery module comprises a plurality of single batteries; the thermal-safety management system comprises a data transmission module, a data recording module, a data analysis and calculation module and a control execution module; the invention can identify the heat generation difference caused by different aging degrees of the lithium battery in the service process and can realize the regulation and control of heat dissipation as required, thereby improving the consistency and the operation performance of the operation temperature of the battery.
Description
Technical Field
The invention relates to the technical field of battery safety management and control, in particular to a lithium battery thermal-safety management system and a management and control method.
Background
The lithium ion battery needs to be charged and discharged at a proper working temperature, and because the battery core can generate heat in the charging and discharging process, if the heat cannot be dissipated in time, the temperature of the battery is too high. An excessively high operating temperature may cause problems such as degradation of the battery performance and life deterioration. On the other hand, if the working temperatures of the battery cells are different for a long time, inconsistent attenuation of the battery capacity and performance is caused, and the overall performance of the battery system is reduced. In addition, the safety is the core problem of the lithium battery in the using process, and when the battery is abused due to self defects, short circuit, overheating and other external problems, the battery material side reaction is triggered, a large amount of heat is gradually generated, and further thermal runaway is caused, so that the safety problems of battery spontaneous combustion, explosion and the like are caused.
In the lithium battery thermal and safety management system in the prior art, the same liquid cooling channel is adopted to perform a thermal management strategy on all grouped power modules, the heating and/or cooling requirements of each single battery module are not considered, and the single battery module cannot be effectively cooled in time after a problem is found in the single battery module, so that thermal runaway and the propagation risk of the thermal runaway are eliminated or reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a lithium battery thermal-safety management system and a management and control method, which can overcome the defects in the prior art, identify the single battery units with problems, perform temperature consistency management and control, strengthen concentrated refrigeration on the battery modules with thermal runaway risks, and reduce or eliminate safety risks.
In order to achieve the aim, the invention provides a lithium battery thermal-safety management system which comprises a thermal-safety management controller, a battery management system, an energy storage converter, an in-box total monitor, a plurality of battery modules and a cooling system, wherein the thermal-safety management controller is used for controlling the thermal-safety management controller to work; the thermal-safety management controller is used for thermally controlling the battery module; the battery module is composed of a plurality of single batteries; the cooling system comprises a liquid cooling channel arranged on the heat dissipation surface of the battery module;
the branches of the liquid cooling channels form a plurality of liquid separating cold pipes, and the liquid separating cold pipes cover the heat dissipation surfaces of each group of battery modules; the liquid cooling channel and the liquid separation cold pipe are respectively provided with a main electromagnetic proportional valve and a sub electromagnetic proportional valve;
the thermal-safety management controller comprises a data transmission unit, a data recording unit, a data analysis and calculation unit and a control execution unit; the data transmission unit receives the single battery operation parameters sent by the battery management system, the energy storage converter and the in-box main monitoring respectively and transmits the single battery operation parameters to the data analysis and calculation unit; the data analysis and calculation unit calculates the heat productivity and the heat dissipation capacity of the single battery and judges the safety state of the battery; the control execution unit receives a control command of the data analysis and calculation unit and drives the main electromagnetic proportional valve to act and the branch electromagnetic proportional valve to act; the data recording unit is used for recording historical data of the single battery operation parameters for the data analysis and calculation unit to call.
The lithium battery thermal-safety management system further comprises a water chiller, wherein the liquid cooling channel is communicated with the water chiller to form a closed loop, and a water pump is arranged on the closed loop; the control execution unit is connected with the water pump control signal.
The lithium battery thermal-safety management system further comprises a plurality of fire sprinkler heads, wherein the fire sprinkler heads are respectively arranged on the liquid cooling channel and the liquid separating cold pipe, and the control execution unit is connected with the fire sprinkler heads through control signals.
The lithium battery thermal-safety management system further comprises an alarm unit connected with the control execution unit through a control signal.
The lithium battery thermal-safety management and control method adopting the lithium battery thermal-safety management system comprises the following steps
Reading in the operation parameters of the single batteries, and performing a lithium battery thermal management process and a single battery safety management process on the battery module according to the operation parameters of the single batteries;
the lithium battery thermal management process comprises the following steps:
a10: calculating the heat productivity of the single battery at the current moment according to the operation parameters of the single battery;
a20: counting the heat productivity and deviation of each battery module;
a30: determining the distribution of the cooling working medium dosage according to the calorific value and deviation of each battery module;
a40: and starting the main electromagnetic proportional valve to open and cool.
The single battery safety management process comprises the following steps:
b10: multi-source parameter safety state judgment is carried out on the single batteries, whether the single batteries are problem single batteries is judged, if yes, the single batteries are marked as problem single batteries, B20 is executed, if not, B10 is executed repeatedly, and whether the problem single batteries exist is judged continuously;
b20: calculating the internal temperature and the temperature gradient of the single battery with the problem by adopting an equivalent thermal resistance network model, judging whether the internal temperature of the single battery with the problem exceeds the limit, and if so, executing B30; if not, executing B10, and continuously judging whether the single battery has the problem;
b30: starting an emergency refrigeration strategy of the problem battery, adjusting a main electromagnetic proportional valve to realize maximum cooling working medium flow distribution on the battery module containing the problem single battery, and starting a distribution electromagnetic proportional valve to start cooling the battery module containing the problem single battery;
b40: calculating the heat dissipation capacity and the heat productivity of the single battery with the problem at the current moment after cooling;
b50: determining the response time of thermal safety control according to the proportional relation of the heating value and the heat dissipation value, judging whether the thermal safety control is controllable, and if so, executing B40; if the fire-fighting spray head is not controllable, the alarm unit and the fire-fighting spray head are started.
The lithium battery thermal-safety control method further comprises the following steps that the battery operation parameters comprise a battery state parameter, a cooling working medium parameter and a safety state parameter; the battery state parameters comprise battery physical property parameters, initial internal resistance and initial OCV; the cooling working medium parameters comprise working medium physical property parameters, working medium temperature and working medium flow; the safety state parameters comprise BMS real-time monitoring data, and the BMS real-time monitoring data comprise voltage values, current values, temperature values and SOC/DOD values.
According to the lithium battery thermal-safety control method, the calorific value of the single battery is further calculated according to the SOC/DOD value, the voltage value, the current value and the initial internal resistance of the battery.
The lithium battery thermal-safety control method further calculates the heat dissipation capacity of the single battery according to the working medium temperature, the working medium flow and the battery physical property parameters.
The lithium battery thermal-safety management and control method further comprises the step criterion of voltage, the OCV/internal resistance change rate criterion, the temperature rise rate criterion, the temperature boundary criterion, the capacity difference criterion, the PCS warning information criterion and the gas/smoke warning information criterion.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can identify the heat generation difference caused by different aging degrees of the lithium battery in the service process, and can realize the regulation and control of heat dissipation as required, thereby improving the consistency and the operation performance of the operation temperature of the battery module.
2. Aiming at the problem single battery with abnormal thermal behavior and thermal runaway risk, the heat exchange strength of the problem single battery is improved through an emergency refrigeration strategy, and when the instantaneous heat productivity in the thermal runaway evolution process is lower than or equal to the heat exchange quantity, the risk grade is expected to be eliminated or reduced.
3. The invention integrates the voltage step criterion, the internal resistance change rate criterion, the temperature rise rate criterion, the critical temperature criterion, the gas/smoke alarm criterion and other multi-source parameters for identifying the safety state, and can identify and judge the safety risk in the early stage.
Drawings
Fig. 1 is a schematic structural diagram of a lithium battery thermal-safety management system provided in an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the heat exchange between the liquid cooling channels and the liquid separating cold tubes provided in the battery module of the embodiment;
FIG. 3 is a schematic diagram of the architecture of the thermal-safety management system;
FIG. 4 is a flowchart illustrating a method for thermal-safety control of a lithium battery according to an embodiment.
Description of reference numerals: 1. a water pump; 2. a liquid cooling channel; 21. liquid separating cold pipe; 3. a main electromagnetic proportional valve; 4. a thermal-safety manager; 401. a data recording unit; 402. a data transmission unit; 403. a control execution unit; 404. a data analysis calculation unit; 5. a battery management system; 6. an energy storage converter; 7. performing total monitoring in the box; 8. a battery module; 9. a water chiller; 10. a distribution electromagnetic proportional valve; 11. a fire sprinkler head; 12. and an alarm unit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
referring to fig. 1 to 3, a lithium battery thermal-safety management system includes a thermal-safety management controller 4, a battery management system 5, an energy storage converter 6, an in-box main monitor 7, a plurality of battery modules 8 and a cooling system; the thermal-safety management controller 4 is configured to thermally manage the battery module 8; the battery module 8 is composed of a plurality of single batteries; the cooling system comprises a liquid cooling channel 2 arranged on the heat dissipation surface of the battery module 8; the branches of the liquid cooling channels 2 form a plurality of liquid separating cold pipes 21, and the liquid separating cold pipes 21 cover the heat dissipation surfaces of each group of the battery modules 8; the liquid cooling channel 2 and the liquid separating cold pipe 21 are respectively provided with a main electromagnetic proportional valve 3 and a sub electromagnetic proportional valve 10; the thermal-safety management controller 4 comprises a data transmission unit 402, a data recording unit 401, a data analysis and calculation unit 404 and a control execution unit 403; the data transmission unit 402 receives the operating parameters of the single batteries sent by the battery management system 5, the energy storage converter 6 and the in-box total monitoring unit 7, and transmits the operating parameters of the single batteries to the data analysis and calculation unit 404; the data analysis and calculation unit 404 calculates the heat productivity and heat dissipation capacity of the single battery, and determines the battery safety state; the control execution unit 403 receives the control command from the data analysis and calculation unit 404, and drives the main electromagnetic proportional valve 3 to operate and the sub electromagnetic proportional valve 10 to operate; the data recording unit 401 is configured to record historical data of the battery cell operating parameters, which is called by the data analysis and calculation unit 404.
Further, the cooling system further comprises a water chiller 9, the liquid cooling channel 2 is communicated with the water chiller 9 to form a closed loop, and a water pump 1 is arranged on the closed loop; the control execution unit 403 is connected with the water pump 1 by control signals. In this embodiment, the cooling medium after the heat exchange of the liquid cooling channel 2 is recycled through the closed loop, and meanwhile, the water pump 1 can also play a role in increasing the cooling medium circulating in the liquid cooling channel 2, and can be used in cooperation with the main electromagnetic proportional valve 3 to rapidly increase the flow of the cooling medium flowing through the battery module 8.
Further, still include a plurality of fire sprinkler heads 11, fire sprinkler heads 11 set up respectively liquid cooling passage 2 with divide liquid cold tube 21 on, control execution unit 403 with fire sprinkler heads 11 control signal is connected. Further, the control executing unit 403 is connected with an alarm unit 12 through a control signal. In this embodiment, when the thermal runaway of the battery module 8 is not controllable, the above fire emergency measures may be started to prevent the thermal runaway from spreading.
In this embodiment, the data transmission unit 402 of the thermal-safety management controller 4 is connected to the battery management system 5, the energy storage converter 6 and the in-box total monitoring unit 7 through a CAN bus/RS 232/RS 485; the control execution unit is connected with the water pump, the main electromagnetic proportional valve, the branch electromagnetic proportional valve, the fire-fighting spray header and the alarm unit through an LIN bus/RS 232/RS 485. The battery management system 5 is used for manually inputting battery physical property parameters, initial internal resistance, initial OCV and working medium physical property parameters, and simultaneously acquiring a voltage value, a current value, a temperature value and an SOC/DOD value of each single battery in the battery module 8 in real time; the energy storage converter 6 can generate PCS warning information when the working condition is abnormal; the main monitoring unit 7 in the box updates the working medium temperature and the working medium flow of the cooling working medium in real time and monitors gas/smoke alarm information through an external sensor. The above data are recorded by the data recording unit 401 of the thermo-safety management controller 4 to form history data of the operating parameters of the unit cells.
It should be noted that fig. 2 is a schematic diagram of heat exchange of a liquid cooling channel and a liquid separating cold pipe arranged on a battery module in the embodiment, in this embodiment, each row of four groups of battery modules 8 shares one liquid cooling channel 2, the liquid cooling channels 2 are arranged in close contact with the heat dissipation surfaces of the battery modules 8, branches of the liquid cooling channels 2 form a plurality of liquid separating cold pipes 21, and the liquid separating cold pipes 21 cover the heat dissipation surfaces of each group of battery modules 8; there is also a thermal insulation plate between each battery module 8 to prevent heat diffusion between the battery modules 8.
Under the normal operation condition, the data analysis and calculation module 404 determines the flow rate of the cooling working medium required by each battery module 8 according to the calorific value of each battery module 8 and the deviation of the calorific value from the average calorific value, and then starts cooling by sending an instruction to the main electromagnetic proportional valve 3 through the control execution module 403, and the cooling working medium achieves the effect of cooling the working temperature of the battery modules 8 through the liquid cooling channels 2 laid on the battery modules 8. The amount of the cooling working medium is dynamically distributed according to the heat productivity of the battery module 8 and the deviation between the heat productivity and the average heat productivity, so that the dynamic redistribution of the heat exchange strength and the temperature consistency management and control of the battery are realized, wherein the cooling working medium comprises one or the combination of air, water, glycol and a refrigerant.
Meanwhile, the data analysis and calculation unit 404 identifies the safety state and the level of the battery in real time through multi-source parameter analysis such as a voltage step criterion, an OCV/internal resistance change rate criterion, a temperature rise rate criterion, a temperature boundary criterion, a gas/smoke alarm criterion and the like according to the historical data of the operating parameters of the single battery stored in the data recording unit 401. Meanwhile, the data analysis and calculation unit 404 calculates the internal temperature and the temperature gradient of the single battery by combining the equivalent thermal resistance network model according to the surface temperature of the single battery, and determines the thermal safety state and the risk level of thermal runaway of the battery. If the risk level is higher, the emergency refrigeration strategy of the problem unit is immediately started, the main electromagnetic proportional valve 3 is adjusted to realize maximum cooling working medium flow distribution on the battery module containing the problem single battery, a large amount of cooling working medium is distributed to a liquid cooling channel where the battery module is located, and the distribution electromagnetic proportional valve 10 is started to intensively cool the battery module, so that the occurrence of thermal runaway is prevented. After emergency refrigeration, according to the proportional relation between the calorific value and the heat dissipation capacity in the abnormal thermal behavior-thermal runaway process, the response time and the controllability of thermal safety control are determined, and if the emergency refrigeration is not enough to prevent the thermal runaway or the thermal runaway is identified to occur, the alarm unit 12 and the fire sprinkler head 11 are started to timely block the propagation of the thermal runaway.
The lithium battery thermal-safety management and control method adopting the lithium battery thermal-safety management system comprises the following steps
Reading in the operation parameters of the single batteries, and performing a lithium battery thermal management process and a single battery safety management process on the battery module according to the operation parameters of the single batteries; furthermore, the battery operation parameters comprise battery state parameters, cooling working medium parameters and safety state parameters; the battery state parameters comprise battery physical property parameters, initial internal resistance and initial OCV; the cooling working medium parameters comprise working medium physical property parameters, working medium temperature and working medium flow; the safety state parameters comprise BMS real-time monitoring data, and the BMS real-time monitoring data comprise voltage values, current values, temperature values and SOC/DOD values.
The lithium battery thermal management process comprises the following steps:
a10: calculating the heat productivity of the single battery at the current moment according to the operation parameters of the single battery;
a20: counting the heat productivity and deviation of each battery module;
a30: determining the distribution of the cooling working medium dosage according to the calorific value and the deviation of each battery module;
a40: and starting the main electromagnetic proportional valve to open and cool.
The lithium battery thermal management process is a work process executed by the battery modules under the working condition of normal operation, and the data analysis and calculation module 404 calculates the calorific value of the single battery at the current moment according to the operation parameters of the single battery and then obtains the calorific value and the deviation of each battery module 8. Then, the flow rate of the cooling medium required for each battery module 8 is determined according to the calorific value of each battery module 8 and the deviation thereof from the average calorific value, and the control execution module 403 issues an instruction to the main electromagnetic proportional valve 3 to start cooling.
The single battery safety management process comprises the following steps:
b10: multi-source parameter safety state judgment is carried out on the single batteries, whether the single batteries are problem single batteries is judged, if yes, the single batteries are marked as problem single batteries, B20 is executed, if not, B10 is executed repeatedly, and whether the problem single batteries exist is judged continuously; the criteria for multi-source parameter safety state judgment comprise a voltage step criterion, an OCV/internal resistance change rate criterion, a temperature rise rate criterion, a temperature boundary criterion, a capacity difference criterion, a PCS warning information criterion and a gas/smoke warning information criterion.
B20: calculating the internal temperature and the temperature gradient of the single battery with the problem by adopting an equivalent thermal resistance network model, judging whether the internal temperature of the single battery with the problem exceeds the limit, and if so, executing B30; if not, executing B10, and continuously judging whether the single battery has the problem;
b30: starting an emergency refrigeration strategy of the problem battery, adjusting a main electromagnetic proportional valve to realize maximum cooling working medium flow distribution on the battery module containing the problem single battery, and starting a distribution electromagnetic proportional valve to start cooling the battery module containing the problem single battery;
b40: calculating the heat dissipation capacity and the heat productivity of the single battery with the problem at the current moment after cooling; further, calculating the heat productivity of the single battery according to the SOC/DOD value, the voltage value, the current value and the initial internal resistance of the battery; and further, calculating the heat dissipation capacity of the single battery according to the working medium temperature, the working medium flow and the battery physical property parameters.
B50: determining the response time of thermal safety control according to the proportional relation of the heating value and the heat dissipation value, judging whether the thermal safety control is controllable, and if so, executing B40; if the fire-fighting spray head is not controllable, the alarm unit and the fire-fighting spray head are started.
The single battery safety management process is a management process for monitoring and emergency refrigeration of the single battery, and the data analysis and calculation module 404 identifies the safety state and the level of the battery in real time through multi-source parameter safety state judgment according to battery state parameter historical data stored in the data recording module 401. And calculating the internal temperature and the temperature gradient of the single battery by combining an equivalent thermal resistance network model according to the surface temperature of the single battery, and judging the thermal safety state of the battery and the risk level of thermal runaway (namely judging whether the internal temperature of the single battery with the problem exceeds the limit). If the risk level is higher, the emergency refrigeration strategy of the problem unit is started immediately, the main electromagnetic proportional valve 3 is adjusted to realize maximum cooling working medium flow distribution on the battery module containing the problem single battery, a large amount of cooling working medium is distributed to a liquid cooling channel where the battery module is located, and then the distribution electromagnetic proportional valve 10 is started to intensively cool the battery module through a liquid separation cold pipe, so that the occurrence of thermal runaway is prevented. After emergency refrigeration, according to the proportional relation between the calorific value and the heat dissipation capacity in the abnormal thermal behavior-thermal runaway process, the response time and the controllability of thermal safety control are determined, and if the emergency refrigeration is not enough to prevent the thermal runaway or the thermal runaway is identified to occur, the alarm unit 12 and the fire sprinkler head 11 are started to timely block the propagation of the thermal runaway. The method of the formula used for the heat generation amount and the heat dissipation amount is described in the prior art. Aiming at the batteries with abnormal thermal behaviors and thermal runaway risks, the invention improves the heat exchange strength of the battery units with problems through an emergency refrigeration strategy, and is expected to eliminate or reduce the risk level when the instantaneous heat productivity in the thermal runaway evolution process is lower than or equal to the heat exchange quantity.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (6)
1. A lithium battery thermal-safety management and control method is used for a lithium battery thermal-safety management system, and the lithium battery thermal-safety management system comprises a thermal-safety management controller (4), a battery management system (5), an energy storage converter (6), an in-box total monitor (7), a plurality of battery modules (8) and a cooling system; the thermal-safety management controller (4) is used for thermally controlling the battery module (8); the battery module (8) is composed of a plurality of single batteries; the cooling system comprises a liquid cooling channel (2) arranged on the heat dissipation surface of the battery module (8); the method is characterized in that:
the branches of the liquid cooling channels (2) form a plurality of liquid separating cold pipes (21), and the liquid separating cold pipes (21) cover the heat dissipation surfaces of each group of battery modules (8); the liquid cooling channel (2) and the liquid separating cold pipe (21) are respectively provided with a main electromagnetic proportional valve (3) and a sub electromagnetic proportional valve (10);
the thermal-safety management controller (4) comprises a data transmission unit (402), a data recording unit (401), a data analysis and calculation unit (404) and a control execution unit (403); the data transmission unit (402) receives the single battery operation parameters sent by the battery management system (5), the energy storage converter (6) and the in-box total monitoring unit (7) respectively, and transmits the single battery operation parameters to the data analysis and calculation unit (404); the data analysis and calculation unit (404) calculates the heat productivity and the heat dissipation capacity of the single battery and judges the safety state of the battery; the control execution unit (403) receives a control command of the data analysis and calculation unit (404) and drives the main electromagnetic proportional valve (3) and the branch electromagnetic proportional valve (10) to act; the data recording unit (401) is used for recording historical data of the single battery operation parameters for being called by the data analysis and calculation unit (404);
the management and control method comprises the following steps:
reading in the operation parameters of the single batteries, and performing a lithium battery thermal management process and a single battery safety management process on the battery module according to the operation parameters of the single batteries;
the lithium battery thermal management process comprises the following steps:
a10: calculating the heat productivity of the single battery at the current moment according to the single battery operation parameters;
a20: counting the heat productivity and deviation of each battery module;
a30: determining the distribution of the cooling working medium dosage according to the calorific value and deviation of each battery module;
a40: starting a main electromagnetic proportional valve to open and cool;
the single battery safety management process comprises the following steps:
b10: multi-source parameter safety state judgment is carried out on the single batteries, whether the single batteries are problem single batteries is judged, if yes, the single batteries are marked as problem single batteries, B20 is executed, if not, B10 is executed repeatedly, and whether the problem single batteries exist is judged continuously;
b20: calculating the internal temperature and the temperature gradient of the single battery with the problem by adopting an equivalent thermal resistance network model, judging whether the internal temperature of the single battery with the problem exceeds the limit, and if so, executing B30; if not, executing B10, and continuously judging whether the single battery has a problem;
b30: starting an emergency refrigeration strategy of the problem battery, adjusting a main electromagnetic proportional valve to realize maximum cooling working medium flow distribution on the battery module containing the problem single battery, and starting a distribution electromagnetic proportional valve to start cooling the battery module containing the problem single battery;
b40: calculating the heat dissipation capacity and the heat productivity of the single battery with the problem at the current moment after cooling;
b50: determining the response time of thermal safety control according to the proportional relation of the heating value and the heat dissipation value, judging whether the thermal safety control is controllable, and if so, executing B40; if the fire-fighting spray head is not controllable, the alarm unit and the fire-fighting spray head are started;
the single battery operation parameters comprise battery state parameters, cooling working medium parameters and safety state parameters; the battery state parameters comprise battery physical property parameters, initial internal resistance and initial OCV; the cooling working medium parameters comprise working medium physical property parameters, working medium temperature and working medium flow; the safety state parameters comprise BMS real-time monitoring data, and the BMS real-time monitoring data comprise a voltage value, a current value, a temperature value and an SOC/DOD value;
the criteria for multi-source parameter safety state judgment comprise a voltage step criterion, an OCV/internal resistance change rate criterion, a temperature rise rate criterion, a temperature boundary criterion, a capacity difference criterion, a PCS warning information criterion and a gas/smoke warning information criterion.
2. The lithium battery thermal-safety management and control method according to claim 1, wherein the cooling system further comprises a water chiller (9), the liquid cooling channel (2) is communicated with the water chiller (9) to form a closed loop, and a water pump (1) is arranged on the closed loop; the control execution unit (403) is connected with the control signal of the water pump (1).
3. The lithium battery thermal-safety management and control method according to claim 1, further comprising a plurality of fire sprinkler heads (11), wherein the fire sprinkler heads (11) are respectively arranged on the liquid cooling channel (2) and the liquid separating cold pipe (21), and the control execution unit (403) is in control signal connection with the fire sprinkler heads (11).
4. The lithium battery thermo-safety management method according to claim 1, wherein the control execution unit (403) is connected with an alarm unit (12) by a control signal.
5. The lithium battery thermal-safety management and control method according to claim 1, wherein the amount of heat generation of the unit battery is calculated from the SOC/DOD value, the voltage value, the current value, and the initial internal resistance.
6. The lithium battery thermal-safety management and control method according to claim 1, wherein the heat dissipation capacity of the single battery is calculated according to working medium temperature, working medium flow and battery physical parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910673309.XA CN112310491B (en) | 2019-07-24 | 2019-07-24 | Lithium battery thermal-safety management system and management and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910673309.XA CN112310491B (en) | 2019-07-24 | 2019-07-24 | Lithium battery thermal-safety management system and management and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112310491A CN112310491A (en) | 2021-02-02 |
| CN112310491B true CN112310491B (en) | 2022-05-13 |
Family
ID=74329117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910673309.XA Active CN112310491B (en) | 2019-07-24 | 2019-07-24 | Lithium battery thermal-safety management system and management and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112310491B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067053B (en) * | 2021-03-26 | 2022-09-30 | 浙江大学 | Phase change submicron capsule emulsion-based battery thermal management system and method thereof |
| CN113410537B (en) * | 2021-04-27 | 2022-08-19 | 浙江合众新能源汽车有限公司 | Power battery charging thermal management control method and system |
| CN113904007A (en) * | 2021-09-22 | 2022-01-07 | 江西昌河汽车有限责任公司 | Integrated battery management system |
| CN218274761U (en) * | 2022-07-15 | 2023-01-10 | 深圳英飞源技术有限公司 | Loop type heat management system |
| CN117134040B (en) * | 2023-10-27 | 2024-03-12 | 内蒙古中电储能技术有限公司 | Intelligent operation and maintenance method and device for liquid cooling energy storage system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5056383B2 (en) * | 2006-12-28 | 2012-10-24 | 日産自動車株式会社 | Battery pack capacity adjustment method and apparatus |
| CN103985921B (en) * | 2014-05-15 | 2016-02-24 | 华霆（合肥）动力技术有限公司 | A kind of supercharged liquid-cooled suppresses battery thermal run away system |
| CN204289651U (en) * | 2014-11-11 | 2015-04-22 | 江苏大学 | A kind of heat management system of vehicle lithium battery group |
| KR101764586B1 (en) * | 2016-12-26 | 2017-09-13 | 주식회사 우리이엔지 | Intelligent battery and PCS enclosure temperature management system for power saving |
| CN207559018U (en) * | 2017-12-26 | 2018-06-29 | 山东大学 | A kind of automobile power cell group temperature control device based on liquid medium |
| CN107946696A (en) * | 2017-12-26 | 2018-04-20 | 山东大学 | A kind of automobile power cell group temperature control device based on liquid medium |
| CN108963378B (en) * | 2018-06-08 | 2024-05-10 | 芜湖埃泰克汽车电子股份有限公司 | Battery pack cooling system and control method thereof |
| CN109738801A (en) * | 2018-11-30 | 2019-05-10 | 铜陵市优车科技有限公司 | Battery system heating power test method and system |
| CN109760484B (en) * | 2018-12-29 | 2021-01-05 | 中国科学院广州能源研究所 | Electric automobile thermal management system |
| CN109841920A (en) * | 2019-03-07 | 2019-06-04 | 肇庆遨优动力电池有限公司 | Battery pack radiator structure |
| CN109962318B (en) * | 2019-03-29 | 2022-06-10 | 重庆邮电大学 | Battery pack cooling liquid flow control system and control method based on dual fuzzy control |
-
2019
- 2019-07-24 CN CN201910673309.XA patent/CN112310491B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112310491A (en) | 2021-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112310491B (en) | Lithium battery thermal-safety management system and management and control method | |
| CN108172930B (en) | Battery pack cooling control method and device and battery pack | |
| CN110380144B (en) | Mixed coordination control method and system for retired lithium iron phosphate and ternary lithium battery | |
| US7550949B2 (en) | Process for controlling temperature of battery pack | |
| WO2019037595A1 (en) | Method and apparatus for protecting power battery of electric vehicle, and electric vehicle | |
| CN102569938B (en) | Heat management device of power battery | |
| WO2022151696A1 (en) | Energy storage liquid-cooling system and temperature control method | |
| JP5567741B2 (en) | Method for monitoring battery charging process, battery system, and vehicle | |
| CN113410537B (en) | Power battery charging thermal management control method and system | |
| CN111864300B (en) | Composite cooling structure based on loop state monitoring and control method thereof | |
| CN116345012B (en) | Thermal safety management system for energy storage battery | |
| CN116470187A (en) | Battery cell temperature equalizing system and method suitable for immersed liquid cooling energy storage system | |
| CN116605098A (en) | Battery thermal management method and device for vehicle, storage medium and vehicle | |
| CN115799717A (en) | Energy-saving energy storage device cooling system and energy-saving method thereof | |
| CN114552050B (en) | Battery system heat management method and heat management device | |
| CN113611946A (en) | Thermal management method and device for energy storage battery cluster | |
| CN117059958A (en) | Air-cooling and liquid-cooling mixed heat dissipation device and method suitable for heat dissipation of lithium ion battery | |
| CN110474128B (en) | Battery module structure based on variable grating and control method | |
| CN110635196A (en) | Vehicle and battery pack cooling control method thereof | |
| KR102577929B1 (en) | Ess cooling system for ship using cold air from cofferdam | |
| CN115411411A (en) | Battery thermal management control method and battery | |
| CN113612269A (en) | Battery monomer charging and discharging control method and system for lead-acid storage battery energy storage station | |
| CN116014295B (en) | Sodium ion battery energy storage module | |
| CN214898603U (en) | Lithium ion energy storage battery pack thermal management system based on palladium alloy sensor | |
| WO2023245930A1 (en) | Domain controller and energy storage system |
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 |