CN117335052B - Battery Bao Re out-of-control protection system and method based on cell data analysis - Google Patents
Battery Bao Re out-of-control protection system and method based on cell data analysis Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007405 data analysis Methods 0.000 title claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 238000012545 processing Methods 0.000 claims abstract description 34
- 230000002159 abnormal effect Effects 0.000 claims abstract description 18
- 230000017525 heat dissipation Effects 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 74
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 51
- 239000002826 coolant Substances 0.000 claims description 25
- 238000007726 management method Methods 0.000 claims description 21
- 239000000178 monomer Substances 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 35
- 238000005457 optimization Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The invention relates to a battery Bao Re out-of-control protection system and method based on cell data analysis, and belongs to the technical field of power batteries. The battery pack consists of a plurality of battery modules, wherein each battery module comprises a plurality of rows of battery cells, and the protection system comprises a BMS system, a central processing module and a thermal management system; the thermal management system is used for collecting temperature information of each row of battery cells and cooling the battery cells, and comprises a thermal protection module and a medium conveying module. According to the battery pack, the BMS system is matched with the central processing module to analyze the battery core data, and the medium conveying module is matched with the thermal protection module to actively dissipate heat of the battery module in an abnormal state of the battery, so that micro short circuit inside the battery is prevented, potential safety hazards are reduced, the service life of the battery pack is prolonged, the thermal protection module can self-regulate the cooling capacity while detecting the temperature, energy waste is reduced, and timely heat dissipation of the battery module is realized.
Description
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to a battery Bao Re out-of-control protection system and method based on electric core data analysis.
Background
The power battery can provide electric power support for the vehicle, and compared with a common battery, the power battery has stronger discharging capability and higher specific energy. The power battery pack is internally provided with a plurality of battery cells, the battery cells are also called battery cores, the battery cells are combined in a series-parallel connection mode to form a battery module, and the plurality of battery modules, the connector, the battery management system and the heat dissipation system form the power battery pack. Under the condition that the battery core of the battery pack is aged or extruded and deformed by external force, the micro-short circuit phenomenon is easy to occur in the battery pack, so that the heating value of the battery pack is increased, and if the battery pack cannot be timely and effectively cooled, the thermal runaway phenomenon is caused, so that potential safety hazards are generated.
The Chinese patent document with the application number of CN202222530342.7 discloses a battery thermal runaway prevention system, which comprises a battery pack formed by connecting a plurality of modules in series, wherein each module is provided with a relatively independent cooling unit and is provided with a contactor, when a battery core is damaged and spontaneous combustion is possible, the system cuts off a load circuit, turns on an air conditioning system circuit, cools the battery module through the air conditioning system, and the occurrence of the condition of spontaneous combustion of the battery pack is avoided. However, the system monitors the overall temperature of each battery module only through the temperature sensor, and when judging that a certain abnormal battery core in the battery pack is heated up rapidly or reaches a rated value, the load circuit is cut off, the abnormal battery core is likely to be damaged, the time node for starting the thermal runaway protection is delayed, a certain potential safety hazard still exists, and the service life of the battery pack is easy to be lost.
Disclosure of Invention
The invention aims to solve the problems and provide a battery Bao Re out-of-control protection system and method based on the analysis of the data of a battery, which have simple structure and reasonable design.
The invention realizes the above purpose through the following technical scheme:
battery Bao Re protection system that out of control based on electric core data analysis, the battery package comprises a plurality of battery modules, the battery module includes the box and locates the inside multiseriate battery monomer of box, and this battery package thermal runaway protection system includes:
the BMS system is used for monitoring the battery core data of the battery pack, and is namely a battery management system;
the central processing module is used for analyzing the cell data acquired by the BMS system;
the thermal management system is used for actively radiating the battery pack according to the analysis result and the self detection result of the central processing module;
the thermal management system comprises a thermal protection module for collecting temperature information of each row of battery monomers and cooling each row of battery monomers, and a medium conveying module for conveying liquid cooling medium to the thermal protection module, wherein the thermal protection module can automatically regulate the flow of the liquid cooling medium according to the temperature change of each row of battery monomers under the working state of the medium conveying module.
As a further optimized scheme of the invention, the thermal protection module comprises a snake-shaped plate which surrounds the outer sides of each row of battery cells, a temperature sensor arranged at the end part of the snake-shaped plate, and a controller for receiving temperature information acquired by the temperature sensor.
As a further optimization scheme of the invention, the heat protection module further comprises a water inlet arranged at one end of the serpentine plate, a water outlet arranged at the other end of the serpentine plate and two groups of liquid cooling channels respectively arranged at two sides of the serpentine plate, wherein the two groups of liquid cooling channels are communicated with the water inlet and the water outlet of the serpentine plate, each group of liquid cooling channels are longitudinally arranged in the serpentine plate, and flow regulating channels are arranged between the upper adjacent liquid cooling channels and the lower adjacent liquid cooling channels.
As a further optimization scheme of the invention, a plurality of flow regulating channels are arranged between the upper liquid cooling channels and the lower liquid cooling channels, the flow regulating channels are arranged in the serpentine plate in a wave shape, two ends of each flow regulating channel are respectively communicated with the two liquid cooling channels, regulating grooves are formed in the flow regulating channels, thermal expansion pieces are fixedly arranged at the bottoms of the regulating grooves, and flashboards are fixedly arranged at the top ends of the thermal expansion pieces.
As a further optimization scheme of the invention, the medium conveying module comprises a liquid storage tank and a water pump communicated with the liquid storage tank; the thermal protection module further includes a water supply piping in communication with the reservoir and each serpentine inlet, and a drain piping in communication with the water pump and each serpentine outlet.
As a further optimization scheme of the invention, the water supply pipe system comprises a water inlet pipe communicated with the liquid storage tank, a first shunt pipe communicated with the water inlet pipe and a second shunt pipe; the drainage system comprises a water outlet pipe communicated with the water pump, a first collecting pipe and a second collecting pipe, wherein the first collecting pipe and the second collecting pipe are communicated with the water outlet pipe, the water inlet and the water outlet of the serpentine plates are arranged reversely, the first shunt pipe is communicated with the water inlet of the serpentine plate on the front side, the second shunt pipe is communicated with the water inlet of the serpentine plate on the rear side, the first collecting pipe is communicated with the water outlet of the serpentine plate on the front side, and the second collecting pipe is communicated with the water outlet of the serpentine plate on the rear side.
As a further optimization scheme of the invention, the front side and the rear side of the snake-shaped plate are provided with temperature sensors.
As a further optimized scheme of the invention, the central processing module comprises a signal receiving unit for receiving the battery cell data sent by the BMS system, an information storage unit for storing preset voltage and current values, preset temperature values and preset temperature threshold values during charging and discharging, an analysis and comparison unit for analyzing the voltage information and the current information in the battery cell data and the temperature information of each column of battery cells, and a signal sending unit for sending control instructions.
As a further optimization scheme of the invention, the signal sending unit is connected with a voice broadcasting module.
A battery Bao Re runaway protection method based on a cell data analysis, comprising the steps of:
s1, acquiring cell data of each battery cell in a battery module through a BMS system, acquiring temperature data of each row of battery cells in the battery module through a thermal protection module, and sending the cell data and the temperature data to a central processing module, judging whether each battery cell has abnormal cell data and judging whether the temperature of each row of battery cell exceeds a temperature set value, wherein the cell data comprises voltage data and current data;
s2, when at least one battery monomer is abnormal in voltage or current value or at least one row of battery monomers is abnormal in temperature exceeding a temperature set value, the central processing module sends a control instruction to the thermal management system, so that the medium conveying module conveys liquid cooling medium to the thermal protection module, and the thermal protection module actively dissipates heat of the battery module;
and S3, in the active heat dissipation process, judging whether the temperature of each row of battery monomers exceeds a temperature threshold value or not through the central processing module, and when at least one row of battery monomers exceeds the temperature threshold value, sending a control instruction to the voice broadcasting module by the central processing module so as to enable the voice broadcasting module to play voice prompts.
The invention has the beneficial effects that:
according to the invention, the BMS system and the thermal management system are matched with the central processing module to analyze the electric core data and the temperature, when the voltage value, the current value or the temperature value of the battery cell is abnormal, the central processing module sends a control instruction to the thermal management system, so that the medium conveying module is matched with the thermal protection module to actively dissipate heat of the battery module, heat on the abnormal battery cell is absorbed in time, the temperature of the battery cell is quickly increased, the micro-short circuit phenomenon inside the battery cell at an excessively high temperature is prevented, the potential safety hazard is reduced, and the service life of the battery pack is prolonged;
according to the invention, the front and rear temperature detection sites are arranged on each row of battery cells of the battery module, so that the measurement accuracy is improved, and the heat protection module can self-regulate the flow of the liquid cooling medium in the serpentine plate according to the temperature change of each row of battery cells in the working state of the medium conveying module, so that the cooling capacity conveyed by the medium conveying module is distributed to each row of battery cells in a targeted manner, the energy waste is reduced, and the timely heat dissipation of the battery module is realized;
according to the invention, the opening and closing states of the flow regulating channels are regulated and controlled by the thermal expansion piece in cooperation with the flashboard, the flashboard moves upwards and is propped against the top of the regulating groove by virtue of the upward expansion of the thermal expansion piece, at the moment, the through holes on the flashboard are intersected with the flow regulating channels, the flow in the snake-shaped plate is increased, the upper ends of the two flow regulating channels on the crest part of the liquid cooling channel below are respectively connected with the front trough part and the rear trough part of the liquid cooling channel adjacent to the upper end and the lower end of the liquid cooling channel, liquid cooling mediums in the liquid cooling channels on the upper side and the lower side of the flow regulating channel can be intersected and heat exchanged, and the temperature uniformity in the vertical direction of the battery module is improved;
according to the invention, the heat expansion pieces with different heat expansion coefficients can be used in the snake-shaped plate, so that when the temperature of the battery monomer is between a temperature set value and a temperature threshold value, each flow regulating channel in the snake-shaped plate is sequentially opened, and the flow self-regulating precision of the heat protection module is improved;
according to the invention, the water inlets and the water outlets of the adjacent liquid cooling channels on the cold plate are reversely arranged, the first shunt pipe and the second shunt pipe are respectively communicated with the water inlets on the front side and the rear side of the serpentine plate, the first collection pipe and the second collection pipe are respectively communicated with the water outlets on the front side and the rear side of the serpentine plate, the flowing directions of liquid cooling mediums in the liquid cooling channels are opposite, and the heat dissipation efficiency of abnormal battery cells and the temperature uniformity of the battery module are further improved;
when the average value of the temperatures of the battery cells exceeds a threshold value, the signal sending unit of the central processing module sends a control signal to the voice broadcasting module, so that the voice broadcasting module sends voices for stopping charging or timely parking to vehicle-mounted personnel and personnel outside the vehicle, the damage to personnel nearby the vehicle caused by thermal runaway of the battery is prevented, in addition, the snake-shaped plate plays a role in explosion suppression while transmitting temperature information and cooling heat in a water cooling mode, and the damage to other battery cells caused by thermal runaway of a certain battery cell is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a CPU module according to the present invention;
FIG. 3 is a schematic diagram of the thermal management system of the present invention;
fig. 4 is a schematic view of the overall structure of the battery module according to the present invention;
FIG. 5 is a top view block diagram of the thermal management system of the present invention;
FIG. 6 is a top perspective view of the thermal management system of the present invention;
FIG. 7 is a schematic diagram showing the distribution of liquid cooling channels and flow regulating channels in a serpentine plate according to the present invention;
FIG. 8 is a schematic view of the internal structure of the regulating tank of the present invention;
fig. 9 is a top view of the battery module according to the present invention.
In the figure: 1. a battery module; 2. a BMS system; 3. a central processing module; 4. a thermal management system; 5. a voice broadcasting module; 11. a case; 12. a battery cell; 13. a passive heat sink; 31. a signal receiving unit; 32. an information storage unit; 33. an analysis and comparison unit; 34. a signal transmitting unit; 41. a thermal protection module; 42. a media transport module; 411. a serpentine plate; 412. a temperature sensor; 413. a liquid cooling channel; 414. a flow regulating passage; 415. an adjustment tank; 416. a thermal expansion member; 417. a flashboard; 418. a water supply pipe system; 419. a drainage system; 421. a liquid storage tank; 422. a water pump; 4181. a water inlet pipe; 4182. a first shunt; 4183. a second shunt tube; 4191. a water outlet pipe; 4192. a first manifold; 4193. and a second manifold.
Detailed Description
The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.
Example 1
Referring to fig. 4-6, a battery Bao Re runaway protection system based on analysis of battery data is shown in fig. 1-8, and the battery pack is composed of a plurality of battery modules 1 for providing power support for a vehicle, wherein the battery modules 1 comprise a case 11 and a plurality of rows of battery cells 12 arranged inside the case 11. As shown in fig. 9, the box 11 is further provided with a passive heat dissipation element 13, and the passive heat dissipation element 13 may be a phase change material or a heat pipe filled in the box 11, or a passive heat dissipation structure obtained by combining the two. In addition, the case 11 has an upper cover and a bottom plate, and the battery cells 12 are hermetically disposed inside the case 11, and the upper cover and the bottom plate of the case 11 are not shown in fig. 4 to 6.
As shown in fig. 2, the thermal runaway protection system for a battery pack includes a BMS system 2, wherein the BMS system 2 is used for monitoring cell data of the battery pack, the cell data includes voltage information and current information when each battery cell 12 is charged and discharged, and the BMS system 2 is a battery management system; the battery Bao Re runaway protection system further comprises a central processing module 3 and a thermal management system 4, wherein the central processing module 3 comprises a signal receiving unit 31 for receiving the battery cell data sent by the BMS system 2, an information storage unit 32 for storing preset voltage and current values, preset temperature values and preset temperature thresholds during charging and discharging, an analysis and comparison unit 33 for analyzing the voltage information and the current information in the battery cell data and the temperature information of each column of battery cells 12, and a signal sending unit 34 for sending control instructions. The temperature set point is less than the temperature threshold, and when the average temperature of a certain row of battery cells 12 rises to the temperature threshold, there is a risk of thermal runaway of the battery pack. In the charge and discharge process of the battery pack, acquiring battery core data of the battery pack through the BMS system 2 to obtain voltage information and current information of each battery cell 12 in each battery module 1, and sending the battery core data to the central processing module 3 in real time, wherein the central processing module 3 compares and analyzes the battery core data and the temperature information to judge whether each battery cell 12 has abnormal voltage or current value or not and judge whether the temperature of each battery cell 12 exceeds a temperature set value and a temperature threshold value or not;
specifically, as shown in fig. 3 and fig. 4, the thermal management system 4 includes a thermal protection module 41 for collecting temperature information of each row of battery cells 12 and cooling down the battery cells 12, and a medium conveying module 42 for conveying a liquid cooling medium to the thermal protection module 41, when a voltage value or a current value of one or more battery cells 12 is abnormal or the temperature of one or more battery cells 12 exceeds a set value, the central processing module 3 sends a control instruction to the thermal management system 4 through the signal sending unit 34, so that the medium conveying module 42 conveys the liquid cooling medium to the thermal protection module 41, actively dissipates heat of the battery module 1 through the thermal protection module 41, timely absorbs heat on the abnormal battery cells 12, avoids a micro-short phenomenon occurring inside the battery cells 12 due to a thermal protection opening time node lag of the battery cells 12, and the thermal protection module 41 can self-regulate the flow of the liquid cooling medium according to the temperature change of each row of battery cells 12 in a working state of the medium conveying module 42, thereby reducing energy waste and realizing heat dissipation of the battery module 1 in time;
further, as shown in fig. 5 and 6, the thermal protection module 41 includes a serpentine 411 surrounding the outside of each row of battery cells 12, temperature sensors 412 disposed at the front and rear ends of the serpentine 411, and a controller for receiving temperature information collected by the temperature sensors 412, wherein the temperature sensors 412 penetrate through the case 11, a high temperature resistant sealant is disposed at a connection portion between each temperature sensor 412 and the case 11, two rows of temperature sensors 412 are formed on the case 11, detection ends of the front rows of temperature sensors 412 are respectively embedded in front ends of the respective serpentine 411, detection ends of the rear rows of temperature sensors 412 are respectively embedded in rear ends of the respective serpentine 411, the temperature sensors 412 are platinum resistance temperature sensors, and the model of the sensor is preferably PL7101. The snake-shaped plate 411 is connected end to end, the left side and the right side of the snake-shaped plate are wavy, and the front end and the rear end of the snake-shaped plate are arc-shaped.
In the process of temperature detection and thermal protection of the thermal management system 4, the thermal protection module 41 is used for collecting temperature information of each row of battery cells 12 in the battery module 1, each row of battery cells 12 transfers heat to detection ends of temperature sensors 412 at front and rear ends of the battery cells through respective serpentine plates 411, and the temperature information of each row of battery cells 12 is collected through the temperature sensors 412. The temperature sensor 412 transmits the temperature information to the controller in real time, the controller calculates the average value of the temperatures measured by the temperature sensors 412 at the front and rear sides of the corrugated plate 411, and transmits the average value of the temperatures of the battery cells 12 in each row to the signal receiving unit 31 of the central processing module 3, and the analysis and comparison unit 33 starts the medium conveying module 42 when judging that the average value of the temperatures of the battery cells 12 in a certain row exceeds the temperature set value, so as to ensure that the temperature information obtained by the central processing module 3 is close to the actual temperature of the battery cells 12. The liquid cooling medium is input into the heat protection module 41 through the medium conveying module 42, the heat protection module 41 can automatically regulate the flow of the liquid cooling medium in the heat protection module 41 according to the surrounding temperature change, so that the cooling capacity conveyed by the medium conveying module 42 is distributed to each row of battery cells 12 in a targeted manner, the temperature uniformity of the battery module 1 is improved, and the heat dissipation efficiency of abnormal batteries is improved.
Specifically, as shown in fig. 6-8, the thermal protection module 41 further includes a water inlet disposed at one end of the serpentine 411, a water outlet disposed at the other end of the serpentine 411, and two sets of liquid cooling channels 413 disposed at two sides of the serpentine 411, where the two sets of liquid cooling channels 413 are all communicated with the water inlet and the water outlet of the serpentine 411, each set of liquid cooling channels 413 is longitudinally arranged inside the serpentine 411, and a flow adjusting channel 414 is disposed between the upper and lower adjacent liquid cooling channels 413. The flow regulating channels 414 between the upper adjacent liquid cooling channels 413 and the lower adjacent liquid cooling channels 413 are provided with a plurality of flow regulating channels 414, the plurality of flow regulating channels 414 are arranged inside the serpentine 411 in a wave shape, two ends of each flow regulating channel 414 are respectively communicated with the two liquid cooling channels 413, the flow regulating channels 414 are provided with regulating grooves 415, the regulating grooves 415 are formed in the serpentine 411, thermal expansion pieces 416 are fixedly arranged at the bottoms of the regulating grooves 415, the tops of the thermal expansion pieces 416 are fixedly provided with flashboards 417 for regulating the opening and closing states of the flow regulating channels 414, the flashboards 417 are in sliding fit with the regulating grooves 415, and through holes corresponding to the flow regulating channels 414 are formed in the flashboards 417.
When the ambient temperature around the thermal expansion member 416 is lower than the temperature set value, the expansion degree of the thermal expansion member 416 is smaller, the through holes on the shutter 417 are staggered with the flow rate adjusting passage 414, and when the ambient temperature around the thermal expansion member 416 exceeds a certain limit, the shutter 417 moves upward and abuts against the top of the adjusting groove 415 by upward expansion of the thermal expansion member 416, and at this time, the through holes on the shutter 417 meet with the flow rate adjusting passage 414.
Referring to fig. 7 and 8, each liquid cooling passage 413 has a crest portion and a trough portion. Except the uppermost liquid cooling channel 413, the crest parts of all the liquid cooling channels 413 are respectively provided with two flow regulating channels 414, the upper ends of the two flow regulating channels 414 are respectively connected to the front trough part and the rear trough part of the liquid cooling channel 413 which are adjacent to the flow regulating channels 414, after the flow regulating channels 414 are opened, the water resistance in the serpentine 411 is reduced, the flow of liquid cooling medium is increased, and the heat dissipation efficiency of the battery cells 12 in the array where the serpentine 411 is arranged can be improved. The liquid cooling medium in the lower liquid cooling channel 413 can upwards enter the upper liquid cooling channel 413 through a flow regulating channel 414, and the upper liquid cooling channel 413 can downwards enter the lower liquid cooling channel 413 through another flow regulating channel 414, so that the liquid cooling mediums in the liquid cooling channels 413 with different heights mutually meet and exchange heat, and the temperature uniformity of the battery module 1 in the vertical direction is improved. In addition, the thermal expansion member 416 may be made of materials with different thermal expansion coefficients and being susceptible to thermal expansion, so that when the temperature average value of the battery cells 12 is between the temperature set value and the temperature threshold value, the flow adjusting channels 414 are sequentially opened, and the flow self-adjusting accuracy of the thermal protection module 41 is improved.
As shown in fig. 5, the medium delivery module 42 includes a liquid tank 421 and a water pump 422 in communication with the liquid tank 421; the heat protection module 41 further comprises a water supply pipe system 418 communicated with the liquid storage tank 421 and the water inlet of each serpentine 411, and a drainage pipe system 419 communicated with the water pump 422 and the water outlet of each serpentine 411, wherein the water supply pipe system 418 and the drainage pipe system 419 are lower than the liquid level in the liquid storage tank 421, in the process of conveying the liquid cooling medium, the water pump 422 pumps the liquid cooling medium in the liquid cooling channel 413 of the serpentine 411 into the liquid storage tank 421 through the drainage pipe system 419, and the liquid cooling medium in the liquid storage tank 421 flows into the liquid cooling channel 413 of the serpentine 411 through the water supply pipe system 418.
Specifically, referring to FIG. 6, the water supply line 418 includes a water inlet tube 4181 in communication with the reservoir 421, a first shunt tube 4182 in communication with the water inlet tube 4181, and a second shunt tube 4183; the drainage system 419 includes a water outlet pipe 4191 communicating with the water pump 422, and a first collecting pipe 4192 and a second collecting pipe 4193 communicating with the water outlet pipe 4191, wherein the water inlet and the water outlet of the adjacent serpentine plates 411 are reversely arranged, the first shunt pipe 4182 is communicated with the water inlet of the front serpentine plate 411, the second shunt pipe 4183 is communicated with the water inlet of the rear serpentine plate 411, the first collecting pipe 4192 is communicated with the water outlet of the front serpentine plate 411, and the second collecting pipe 4193 is communicated with the water outlet of the rear serpentine plate 411. The liquid cooling medium in each liquid cooling passage 413 flows in the opposite direction, and the heat dissipation effect and the temperature uniformity of the battery module 1 are improved. In addition, the medium delivery module 42 may be provided in plurality, that is, each battery module 1 is provided with an independent liquid storage tank 421 and water pump 422; it is also possible to provide only one medium delivery module 42, in which embodiment the inlet pipes 4181 of each thermal protection module 41 are integrated together, sharing one tank 421, and correspondingly, the outlet pipes 4191 are integrated together, and the outlet ports of the outlet pipes 4191 are brought together and connected to the inlet port of one water pump 422. The liquid storage tank 421 is also provided with a cooling device, which can be a heat pipe, or can be a cooling system arranged in the vehicle where the battery pack is located, or can be an air conditioning system in the vehicle where the battery pack is located, so as to cool the liquid cooling medium in the liquid storage tank 421.
As shown in fig. 1, the battery pack thermal runaway protection system further includes a voice broadcasting module 5 connected to the signal sending unit 34, where when the central processing module 3 determines that the temperature average value of a certain row of battery cells 12 exceeds the temperature threshold, the signal sending unit 34 of the central processing module 3 sends a control signal to the voice broadcasting module 5, so that the voice broadcasting module 5 sends voices for stopping charging or timely parking to on-board personnel and off-board personnel.
Example 2
As shown in fig. 1-9, the present embodiment provides a battery Bao Re runaway protection method based on the analysis of the electrical core data, which includes the following steps:
s1, acquiring cell data of each battery cell 12 in a battery module 1 through a BMS system 2, acquiring temperature data of each row of battery cells 12 in the battery module 1 through a thermal protection module 41, and sending the cell data and the temperature data to a central processing module 3, judging whether each battery cell 12 has abnormal cell data and judging whether the temperature of each row of battery cells 12 exceeds a temperature set value, wherein the cell data comprises voltage data and current data;
s2, when at least one battery cell 12 has abnormal voltage or current value or at least one row of battery cells 12 has temperature exceeding a temperature set value, the central processing module 3 sends a control instruction to the thermal management system 4, so that the medium conveying module 42 conveys liquid cooling medium to the thermal protection module 41, and the thermal protection module 41 actively dissipates heat of the battery module 1;
the central processing module 3 sends a control instruction to the thermal management system 4 through the signal sending unit 34, so that the medium conveying module 42 conveys the liquid cooling medium to the thermal protection module 41, and the thermal protection module 41 actively dissipates heat to the battery module 1; specifically, the water pump 422 pumps the liquid cooling medium in the liquid cooling channel 413 of the serpentine 411 to the liquid storage tank 421 through the drainage system 419, the liquid cooling medium in the liquid storage tank 421 flows into the liquid cooling channel 413 of the serpentine 411 through the water supply pipe 418, the heat on the battery monomer 12 is carried out in the process that the liquid cooling medium flows through the liquid cooling channel 413, and as the temperature of the battery monomer 12 rises, the thermal expansion piece 416 expands upwards, so that the gate 417 moves upwards and is propped against the top of the adjusting groove 415, and at the moment, the through hole on the gate 417 is intersected with the flow adjusting channel 414, so that the flow of the liquid cooling medium in the serpentine 411 can be increased, and the flow self-adjustment is realized;
and S3, in the active heat dissipation process, judging whether the temperature of each row of battery cells 12 exceeds a temperature threshold through the central processing module 3, and when the temperature of at least one row of battery cells 12 exceeds the temperature threshold, sending a control instruction to the voice broadcasting module 5 by the central processing module 3 to enable the voice broadcasting module 5 to play a voice prompt, and sending a voice for stopping charging or timely parking to on-board personnel and off-board personnel by the voice broadcasting module 5 to prevent injury to personnel nearby the vehicle due to thermal runaway of the battery.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (7)
1. The utility model provides a battery Bao Re protection system that out of control based on electric core data analysis, the battery package comprises a plurality of battery modules, the battery module includes the box and locates the inside multiseriate battery monomer of box, its characterized in that, this battery package thermal runaway protection system includes:
the BMS system is used for monitoring the cell data of the battery pack;
the central processing module is used for analyzing the cell data acquired by the BMS system;
the thermal management system is used for actively radiating the battery pack according to the analysis result and the self detection result of the central processing module;
the thermal management system comprises a thermal protection module for collecting temperature information of each row of battery cells and cooling each row of battery cells, and a medium conveying module for conveying liquid cooling medium to the thermal protection module, wherein the thermal protection module can automatically regulate the flow of the liquid cooling medium according to the temperature change of each row of battery cells in the working state of the medium conveying module;
the heat protection module is including surrounding the snake-shaped plate that sets up in every single outside of battery to and locate the temperature sensor of snake-shaped plate tip, and be used for receiving the temperature information's that temperature sensor gathered controller, the heat protection module is still including the water inlet of locating snake-shaped plate one end, locate the delivery port of snake-shaped plate other end and locate two sets of liquid cooling passageway of snake-shaped plate both sides respectively, and two sets of liquid cooling passageway all communicate with the water inlet and the delivery port of snake-shaped plate, every liquid cooling passageway of group all longitudinal arrangement is in the inside of snake-shaped plate, be equipped with flow control passageway between the upper and lower adjacent liquid cooling passageway, flow control passageway between the upper and lower adjacent liquid cooling passageway is equipped with a plurality of, and a plurality of flow control passageway are the wave and arrange inside the snake-shaped plate, flow control passageway's both ends communicate with two liquid cooling passageway respectively, and be equipped with the adjustment tank on the flow control passageway, the adjustment tank bottom has set firmly thermal expansion piece, thermal expansion piece top has set firmly the flashboard.
2. The battery Bao Re runaway protection system of claim 1, wherein: the medium conveying module comprises a liquid storage tank and a water pump communicated with the liquid storage tank; the thermal protection module further includes a water supply piping in communication with the reservoir and each serpentine inlet, and a drain piping in communication with the water pump and each serpentine outlet.
3. The battery Bao Re runaway protection system of claim 2, wherein: the water supply pipe system comprises a water inlet pipe communicated with the liquid storage tank, a first shunt pipe and a second shunt pipe which are communicated with the water inlet pipe; the drainage system comprises a water outlet pipe communicated with the water pump, a first collecting pipe and a second collecting pipe, wherein the first collecting pipe and the second collecting pipe are communicated with the water outlet pipe, the water inlet and the water outlet of the serpentine plates are arranged reversely, the first shunt pipe is communicated with the water inlet of the serpentine plate on the front side, the second shunt pipe is communicated with the water inlet of the serpentine plate on the rear side, the first collecting pipe is communicated with the water outlet of the serpentine plate on the front side, and the second collecting pipe is communicated with the water outlet of the serpentine plate on the rear side.
4. The battery Bao Re runaway protection system of claim 1, wherein: temperature sensors are arranged on the front side and the rear side of the snake-shaped plate.
5. The battery Bao Re runaway protection system of claim 1, wherein: the central processing module comprises a signal receiving unit for receiving battery cell data sent by the BMS system, an information storage unit for storing preset voltage and current values, preset temperature values and preset temperature thresholds during charging and discharging, an analysis and comparison unit for analyzing voltage information and current information in the battery cell data and temperature information of each column of battery cells, and a signal sending unit for sending control instructions.
6. The battery Bao Re runaway protection system of claim 5, wherein: the signal sending unit is connected with a voice broadcasting module.
7. A battery Bao Re runaway protection method based on electrical core data analysis, which is characterized in that: a battery Bao Re runaway protection system for use with claim 6, comprising the steps of:
s1, acquiring cell data of each battery cell in a battery module through a BMS system, acquiring temperature data of each row of battery cells in the battery module through a thermal protection module, and sending the cell data and the temperature data to a central processing module, judging whether each battery cell has abnormal cell data and judging whether the temperature of each row of battery cell exceeds a temperature set value, wherein the cell data comprises voltage data and current data;
s2, when at least one battery monomer is abnormal in voltage or current value or at least one row of battery monomers is abnormal in temperature exceeding a temperature set value, the central processing module sends a control instruction to the thermal management system, so that the medium conveying module conveys liquid cooling medium to the thermal protection module, and the thermal protection module actively dissipates heat of the battery module;
and S3, in the active heat dissipation process, judging whether the temperature of each row of battery monomers exceeds a temperature threshold value or not through the central processing module, and when at least one row of battery monomers exceeds the temperature threshold value, sending a control instruction to the voice broadcasting module by the central processing module so as to enable the voice broadcasting module to play voice prompts.
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