CN116666795A - Power battery and vehicle with same - Google Patents
Power battery and vehicle with same Download PDFInfo
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- CN116666795A CN116666795A CN202310778779.9A CN202310778779A CN116666795A CN 116666795 A CN116666795 A CN 116666795A CN 202310778779 A CN202310778779 A CN 202310778779A CN 116666795 A CN116666795 A CN 116666795A
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- 230000007246 mechanism Effects 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 11
- 238000007726 management method Methods 0.000 description 40
- 230000006870 function Effects 0.000 description 36
- 238000000034 method Methods 0.000 description 25
- 230000002159 abnormal effect Effects 0.000 description 18
- 238000001514 detection method Methods 0.000 description 17
- 230000003993 interaction Effects 0.000 description 16
- 238000012545 processing Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application relates to the technical field of power battery design, and particularly provides a power battery and a vehicle with the same, wherein the power battery comprises a multifunctional sensor structure, and the multifunctional sensor structure comprises: a plate-shaped main body structure connected with the power battery box; at least one of an air pressure sensor, a safety explosion-proof valve, a humidity sensor and a dehumidifier is arranged on one side of the plate-shaped main body structure, which faces the box, a respirator is arranged on one side of the plate-shaped main body structure, which faces away from the box, the respirator is communicated with the inside of the box, the respirator is used for balancing the air pressure environment inside the box, the air pressure sensor is used for detecting the air pressure inside the box, and the humidity sensor is used for detecting the environment humidity inside the box, and the air pressure sensor, the safety explosion-proof valve, the humidity sensor, the dehumidifier and the respirator are electrically connected with the battery management system. The application effectively solves the problem of single function mode of the safety protection measure of the power battery in the prior art.
Description
Technical Field
The application relates to the technical field of power battery design, in particular to a power battery and a vehicle with the same.
Background
With the development of new energy automobile technology, the market share of electric automobiles is remarkably improved. When a user selects a vehicle purchase, the safety problem of the power battery is an important consideration, especially the safety threat of the power battery system, the safety threat of the vehicle and the passengers of the whole vehicle can be caused by abnormal sampling inside the battery system, insulation failure, thermal runaway caused by internal short circuit of the power battery system due to extreme working condition or abusive working condition, and the like caused by the excessive humidity inside the battery.
Most current power battery systems are provided with safety monitoring schemes, including setting related sensors and software control. More commonly, an independent sensor or actuator, such as a barometric sensor, is used to report a hazard signal in time when the power cell system is out of control. The safety explosion-proof valve is used for timely opening when the power battery system is out of control, and timely guiding and releasing high-temperature and high-pressure gas in the power battery box to the outside of the battery system. The safety protection measures of the power battery system have single functional mode and directly affect the internal arrangement scheme, the production efficiency and the cost of the battery system. In addition, in the early stage of the safety risk of the power battery system, the vehicle driver and passengers cannot acquire related information in time, and the time for optimal vehicle maintenance or safe evacuation is missed, so that serious safety accidents can be caused.
In view of the above problems in the prior art, no effective solution has been proposed at present.
Disclosure of Invention
The application aims to provide a power battery and a vehicle with the same, which at least solve the problem of single functional mode of the power battery safety protection measure in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a power battery including a multi-function sensor structure electrically connected with a battery management system of the power battery, the multi-function sensor structure including: a plate-shaped main body structure connected with the power battery box; at least one of an air pressure sensor, a safety explosion-proof valve, a humidity sensor and a dehumidifier is arranged on one side of the plate-shaped main body structure, which faces the box, a respirator is arranged on one side, which faces away from the box, of the plate-shaped main body structure, the respirator is communicated with the inside of the box, the respirator is used for balancing the air pressure environment inside the box, the air pressure sensor is used for detecting the air pressure inside the box, the humidity sensor is used for detecting the ambient humidity inside the box, the humidity sensor and the dehumidifier are all communicated with the inside of the box, and the air pressure sensor, the safety explosion-proof valve, the humidity sensor, the dehumidifier and the respirator are all electrically connected with the battery management system.
Further, the multifunctional sensor mounting mechanisms are arranged on two sides of the length direction of the plate-shaped main body structure, and the plate-shaped main body structure is connected with the box body through the multifunctional sensor mounting mechanisms.
Further, the one side of platy major structure orientation box is provided with boss structure, and boss structure extends along platy major structure's length direction and arranges, and air pressure sensor is outstanding to be set up on boss structure, and the dehumidifier is integrated to be set up in boss structure inside, and humidity transducer sets up in the top of dehumidifier, and air pressure sensor and humidity transducer set up along boss structure's length direction interval.
Further, the safety explosion-proof valve is arranged close to the boss structure, the end part of the safety explosion-proof valve is provided with an air guide channel, the air guide channel is communicated with the inside of the box body, and when the valve core of the safety explosion-proof valve is in an open state, the inside of the box body is communicated with the external environment through the air guide channel.
Further, the safety explosion-proof valve and the boss structure are integrally formed.
Further, the inside of boss structure forms the cavity, and the top lateral wall of cavity has at least one via hole, and the connection pencil of baroceptor, the connection pencil of safety explosion-proof valve, humidity transducer's connection pencil, dehumidifier's connection pencil, respirator's connection pencil are twined after at least one passes the via hole and are formed fast plug wire bundle terminal, fast plug wire bundle terminal and battery management system electric connection.
Further, the respirator and the safety explosion-proof valve are arranged on two sides of the same end of the plate-shaped main body structure in the thickness direction.
Further, a breathable film membrane is arranged in the respirator, and the breathable film membrane is made of polytetrafluoroethylene.
Further, the multifunctional sensor structure is a plurality of, and a plurality of multifunctional sensor structures set up along the circumference lateral wall interval of box, and a plurality of multifunctional sensor structures all are connected with the box, and a plurality of multifunctional sensor structures all are with battery management system electric connection.
According to another aspect of the present application, there is provided a vehicle including a power battery, the power battery being the power battery described above.
By applying the technical scheme of the application, the multifunctional sensor structure comprises at least one of an air pressure sensor, a safety explosion-proof valve, a humidity sensor, a dehumidifier and a breather, and is electrically connected with a battery management system, so that the multifunctional sensor structure is integrated with various parameter acquisition and execution functions, and the integrated multifunctional sensor structure is convenient for mechanical installation, can replace the independent arrangement of a battery air pressure sensor, a breather, the safety explosion-proof valve, the humidity sensor and the dehumidifier in a power battery box body, simplifies the number of parts of the power battery system and the processing steps of the power battery box body, reduces the corresponding cost, and is convenient for a battery management system to execute control tasks such as unified self-checking, enabling, information interaction and the like. When part of the structure is damaged or abnormal, the whole battery pack is not required to be replaced, and only the multifunctional sensor structure is required to be inspected and maintained. By adopting the technical scheme of the application, the problem of single functional mode of the safety protection measure of the power battery in the prior art is effectively solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a multi-functional sensor structure according to the present application;
fig. 2 shows a schematic structural view of a second embodiment of a multi-functional sensor structure according to the present application;
fig. 3 shows a schematic structural view of an embodiment of a power cell according to the present application;
fig. 4 shows a flow schematic of a first embodiment of a control method of a power battery according to the application;
fig. 5 shows a flow schematic of a second embodiment of a control method of a power battery according to the application;
fig. 6 shows a hardware block diagram of a control device of a power battery according to the present application.
Wherein the above figures include the following reference numerals:
11. a power battery module; 21. a case; 31. a battery management system; 41. a multi-function sensor structure; 411. an air pressure sensor; 412. a respirator; 413. a safety explosion-proof valve; 414. a humidity sensor; 415. a dehumidifier; 416. a fast wire harness terminal; 417. a multifunctional sensor mounting mechanism; 51. a plate-like main body structure; 61. a power battery box mounting mechanism; 100. a power battery system.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
As shown in connection with fig. 1 to 3, a power cell is provided according to an embodiment of the present application.
Fig. 1 shows a schematic structural view of a first embodiment of a multifunctional sensor structure according to the present application, a power cell comprising the multifunctional sensor structure. The multifunctional sensor structure 41 is electrically connected with a battery management system of the power battery, and the multifunctional sensor structure 41 includes: a plate-like main body structure 51, the plate-like main body structure 51 being connected to the case 21 of the power battery; at least one of an air pressure sensor 411, a safety explosion-proof valve 413, a humidity sensor 414, and a dehumidifier 415 is provided on a side of the plate-like main structure 51 facing the case 21. As shown in fig. 2, which is a schematic structural diagram of a second embodiment of the multifunctional sensor structure according to the present application, a breather 412 is disposed on a side of the plate-shaped main body structure 51 facing away from the case 21, the breather 412 is in communication with the inside of the case 21, the breather 412 is used for balancing the air pressure environment inside the case 21, the air pressure sensor 411 is used for detecting the air pressure inside the case 21, the humidity sensor 414 is used for detecting the ambient humidity inside the case 21, the humidity sensor 414 and the dehumidifier 415 are all in communication with the inside of the case 21, and the air pressure sensor 411, the safety explosion-proof valve 413, the humidity sensor 414, the dehumidifier 415 and the breather 412 are all electrically connected with the battery management system 31.
By designing the multifunctional sensor structure 41, the multifunctional sensor structure 41 comprises at least one of an air pressure sensor 411, a safety explosion-proof valve 413, a humidity sensor 414, a dehumidifier 415 and a breather 412, and the structures are electrically connected with the battery management system 31, so that the multifunctional sensor structure 41 integrates various parameter acquisition and execution functions, the integrated multifunctional sensor structure 41 is convenient for mechanical installation, the battery air pressure sensor, the breather, the safety explosion-proof valve, the humidity sensor and the dehumidifier can be independently arranged in a power battery box body instead of the power battery box body, the number of parts of the power battery system and the processing steps of the power battery box body are simplified, the corresponding cost is reduced, and meanwhile, the battery management system 31 is convenient for executing control tasks such as unified self-checking and enabling. When part of the structure is damaged or abnormal, the battery pack is not required to be replaced in a whole package, and only the multifunctional sensor structure 41 is required to be inspected and maintained. By adopting the technical scheme of the application, the problem of single functional mode of the safety protection measure of the power battery in the prior art is effectively solved. In fact, existing power cells typically have some sensors disposed within the housing, but are limited to the housing space and harness arrangement, which often only has a select portion of the sensors integrated therein, and therefore cannot monitor or perform the function of the battery pack information in an all-round manner, such that the risk of damage to the power cell cannot be found at an early stage. The multifunctional sensor of the application integrates the following functions: air pressure sensor function, respirator function, safety explosion-proof valve function, humidity sensor function, dehumidifier function.
Fig. 3 shows a schematic structural view of an embodiment of a power cell according to the application; the power battery system 100 includes: the power battery module 11, the box 21, the battery management system 31, the multifunctional sensor structure 41 and the power battery box mounting mechanism 61. Further, the plate-like main body structure 51 is provided with a multifunctional sensor mounting mechanism 417 on both sides in the longitudinal direction, and the plate-like main body structure 51 is connected to the case 21 by the multifunctional sensor mounting mechanism 417.
Further, a boss structure is provided on one side of the plate-shaped main body structure 51 facing the case 21, the boss structure extends along the length direction of the plate-shaped main body structure 51, the air pressure sensor 411 is arranged on the boss structure in a protruding manner, the dehumidifier 415 is arranged inside the boss structure in an integrated manner, the humidity sensor 414 is arranged at the top of the dehumidifier 415, and the air pressure sensor 411 and the humidity sensor 414 are arranged at intervals along the length direction of the boss structure. The integrated level of the whole structure can be improved by the arrangement, and the installation and wiring are convenient.
Further, the safety explosion-proof valve 413 is arranged close to the boss structure, the end part of the safety explosion-proof valve 413 is provided with a gas guiding channel, the gas guiding channel is communicated with the inside of the box body 21, and when the valve core of the safety explosion-proof valve 413 is in an open state, the inside of the box body 21 is communicated with the external environment through the gas guiding channel.
Optionally, the multifunctional sensor structure 41 is an integrated structure and is disposed at the end face panel position of the power battery box body.
Specifically, the air pressure sensor function is arranged inside the multifunctional sensor of the power battery and is used for detecting the air pressure inside the power battery system, and when the air pressure exceeds a design threshold value, the safety state of the power battery system is judged to be abnormal.
Further, the respirator function is arranged inside the multifunctional sensor of the power battery and used for balancing the air pressure environment inside the power battery system. The power battery respirator has the advantages that the function of the power battery respirator realizes bidirectional breathing through the built-in microporous breathable film membrane, the membrane is made of expanded polytetrafluoroethylene, the flame retardance grade is UL94-V0, and the IP67 and IP68 dustproof and waterproof function grades can be realized.
Specifically, the breathing apparatus function can realize two-way breathing, and is realized by self-adjustment according to the states of the internal air pressure and the external atmospheric pressure of the battery system without a corresponding control method.
Further, the explosion-proof valve function is arranged inside the multifunctional sensor of the power battery, and when the safe explosion-proof valve cavity of the power battery is opened, the explosion-proof valve can be communicated with the inner cavity of the power battery box and the external atmospheric environment of the power battery system to provide a channel for quickly releasing high-temperature high-pressure gas in the power battery box.
Specifically, an interlocking switch is arranged in the explosion-proof valve function, when the power battery safety explosion-proof valve is opened, an opening signal is sent to the electronic hardware device, man-machine information interaction can be realized through the whole vehicle display device, and the running safety risk of the whole vehicle is reduced.
For example, the humidity sensor function is arranged inside the multifunctional power battery sensor and is used for monitoring the humidity of the closed gas inside the power battery box body. And when the humidity detection value of the closed gas in the power battery box body is more than the design threshold value, judging that the humidity of the power battery is abnormal. The multifunctional power battery sensor sends the abnormal signal to the electronic hardware device, man-machine information interaction can be realized through the whole vehicle display device, insulation fault and even potential safety hazard caused by abnormal humidity of the closed gas in the power battery box body are reduced, and further the running safety risk of the whole vehicle is reduced.
Further, the dehumidifier function is arranged inside the multifunctional sensor of the power battery, when the humidity detection value of the closed gas inside the power battery box body is more than the design threshold value, the closed gas inside the power battery box body is dehumidified, and potential safety hazards caused by phenomena of small amount of water immersion, condensation and the like caused by special working conditions inside the power battery box body are reduced. Dehumidification is achieved by self-regulation without a corresponding control method.
Further, the safety explosion-proof valve 413 is integrally provided with the boss structure. The arrangement can improve the whole processability and reduce the production cost.
Further, a cavity is formed in the boss structure, at least one through hole is formed in the top side wall of the cavity, at least one of a connection harness of the air pressure sensor 411, a connection harness of the safety explosion-proof valve 413, a connection harness of the humidity sensor 414, a connection harness of the dehumidifier 415 and a connection harness of the respirator 412 penetrates through the through hole and then is wound to form a fast plug wire harness terminal 416, and the fast plug wire harness terminal 416 is electrically connected with the battery management system 31. That is, the quick wire harness terminal 416 is electrically connected to the battery management system 31 by quick wires, facilitating disassembly of the multi-function sensor structure 41 and troubleshooting.
Further, the breather 412 and the safety explosion-proof valve 413 are provided on both sides in the thickness direction of the same end of the plate-like main body structure 51.
The interior of the respirator 412 is provided with a breathable film membrane made of polytetrafluoroethylene.
Further, the plurality of multifunctional sensor structures 41 are provided, the plurality of multifunctional sensor structures 41 are arranged along the circumferential side wall of the box body 21 at intervals, the plurality of multifunctional sensor structures 41 are connected with the box body 21, and the plurality of multifunctional sensor structures 41 are electrically connected with the battery management system 31.
Fig. 4 shows a flow schematic of a first embodiment of a control method of a power battery according to the application;
specifically, the control method of the multifunctional sensor of the power battery adopts the multifunctional sensor to control, and comprises the following steps:
step S21, after the whole vehicle is electrified, the BMS self-checks to confirm that the BMS is in a normal state;
specifically, after receiving a whole vehicle power-on instruction, the battery management system BMS initializes a memory, a register, a sampling chip and other complex drives in the battery management system BMS, diagnoses the power battery management system BMS controller and synchronously triggers the power battery multifunctional sensor to start working; after the process is finished, the state of the electric components of the power battery system, such as a relay, a power battery system cell and the like, is detected. After the detection is completed, the self-detection is completed.
Step S22, performing self-checking of the multifunctional sensor; if the self-checking state is normal, further detecting the following functional signals of the multifunctional sensor: detecting the functional signal state of a power battery air pressure sensor, the functional signal state of a power battery safety explosion-proof valve and the functional signal state of a power battery humidity heat sensor;
step S23, judging that the detection state of the functional signal of the multifunctional sensor is normal/abnormal, and sending the detection result of each functional signal state to the BMS;
step S24, the battery management system BMS confirms and judges signals of the multifunctional power battery sensor, and meanwhile, the battery management system BMS detects the normal/abnormal state of the battery system; the method comprises the steps of sending a detection state result of a functional signal of a multifunctional sensor to a vehicle control unit VCU;
step S25, the whole vehicle controller VCU confirms and judges the whole state of the power battery system and sends the detection state of the functional signal of the multifunctional sensor to the whole vehicle display device;
step S26, the whole vehicle display device displays normal or abnormal state information of the power battery system, and can realize man-machine interaction in the modes of text display, signal lamp display, voice broadcasting and the like, so that the safety risk in the whole vehicle driving process is reduced.
The technical scheme of the application provides a control method of a multifunctional sensor of a power battery. The control method of the multifunctional sensor of the power battery adopts the multifunctional sensor of the power battery for control, and comprises the following steps: each sensor can carry out signal interaction with battery management system BMS, and BMS can send the signal and the execution state that gather to whole car display device to realize power battery and whole car user's man-machine information interaction. Based on the text information or the voice prompt displayed by the whole vehicle display device, a vehicle user can acquire the safety state of the power battery system, timely carry out vehicle maintenance according to the information prompt of the danger alarm and timely withdraw the vehicle when giving an alarm about thermal runaway, so that the safety risk in the whole vehicle driving process is reduced, and particularly the safety risk of the whole vehicle user caused by the thermal runaway of the power battery is reduced.
Fig. 5 shows a flow diagram of a second embodiment of a control method of a power battery according to the application, i.e. a power battery multi-function sensor control strategy model. Specifically, the process includes:
after the whole vehicle is electrified, firstly, performing self-checking by a power battery management system BMS; if the self-checking result is that the BMS state is normal, performing self-checking of the multifunctional sensor structure 41; if the self-checking result is that the state of the multifunctional sensor structure 41 is normal, the signal acquisition and processing of the multifunctional sensor structure 41 can be performed; the signal processing result of the multifunctional sensor structure 41 is further sent to a power battery management system BMS, the power battery management system BMS performs further signal confirmation and judgment by combining the whole detection state of the power battery system 100, and finally the signal processing result is sent to a whole vehicle controller VCU and is sent to the whole vehicle controller VCU to be concentrated and finally sent to a whole vehicle display device;
further, the whole vehicle is powered on as the action of the whole vehicle driver or other users of the whole vehicle, and if the action is not performed, the multifunctional sensor structure 41 is in a non-working state;
further, the signal detection content of the multifunctional sensor of the power battery is as follows: the air pressure signal state in the box body 21 detected by the air pressure sensor 411, the opening state of the safety explosion-proof valve 413 and the air humidity signal state in the box body 21 of the power battery detected by the humidity sensor 414;
further, the battery management system BMS is an overall state detection and control unit of the power battery system, after the battery management system BMS receives a state signal sent by the power battery multifunctional sensor, the power battery management system BMS performs further signal confirmation and judgment by combining the overall detection state of the power battery system, and finally sends a signal processing result to the whole vehicle controller VCU;
further, the whole vehicle controller VCU is disposed on the whole vehicle, and the whole vehicle controller VCU communicates with the whole vehicle display device to perform final signal transmission.
Further, the whole vehicle display device is arranged on the whole vehicle and used for displaying normal or abnormal state information of the power battery system, and man-machine interaction can be realized in the forms of text display, signal lamp display, voice broadcasting or the like, so that the safety risk in the whole vehicle driving process is reduced. The whole vehicle display device can display the words of power battery thermal runaway warning, power battery thermal runaway accident processing, power battery state normal and power battery state abnormal. The voice broadcasting mode for displaying the characters can also be adopted.
Fig. 6 shows a hardware block diagram of a control device of a power battery according to the present application, including: the power battery system 100, the multifunctional sensor structure 41, the battery management system 31, the whole vehicle controller VCU and the whole vehicle display device. Further, the power battery system 100 is the whole power battery system with complete functions and capable of being used for being mounted on a vehicle, wherein the hardware of the electronic device comprises a multifunctional sensor structure 41 and a power battery management system BMS, and the components are all arranged inside the power battery system 100; further, the whole vehicle controller VCU has the function of interacting signals with the power battery management system BMS; the system has the function of performing signal interaction with the whole vehicle display device; further, the whole vehicle display device is electronic device hardware for performing signal interaction between the whole vehicle and the BMS, is arranged on the whole vehicle, and can be a whole vehicle Liquid Crystal Display (LCD). The whole vehicle display device has the function of displaying relevant information of the power battery, and can realize man-machine interaction of the power battery and a whole vehicle user in the forms of text display, signal lamp display, voice broadcast and the like. The whole vehicle display device can display the words of power battery thermal runaway warning, power battery thermal runaway accident processing, power battery state normal and power battery state abnormal. The voice broadcasting mode for displaying the characters can also be adopted.
The following description will now be made of the various functions of the multifunction sensor structure 41, in which the power cell multifunction sensor, that is, the multifunction sensor structure 41:
barometric sensor function: specifically, the internal air pressure of the power battery box body is monitored, when the internal air pressure of the power battery box body is abnormally high, a signal is reported to the power battery management system BMS at the first time, and the power battery management system BMS performs signal interaction with the VCU of the whole vehicle controller, judges and executes a control strategy. The thermal runaway risk of the power battery can be identified in advance through the function of the air pressure sensor of the power battery; the VCU sends the processed signals to the whole vehicle display device, and is used for reminding a whole vehicle user of timely keeping away from the vehicle, so that the personal danger caused by thermal runaway of the power battery is avoided.
The air pressure sensor is integrated to the multifunctional sensor of the power battery, is arranged in the power battery box body, can replace the battery air pressure sensor arranged in the power battery box body independently, simplifies the number of parts of the power battery system, simplifies the processing steps of the power battery box body and reduces the corresponding cost.
Power battery respirator function: the air pressure in the power battery box body and the air pressure outside the power battery box body are regulated, so that a bidirectional breathing function can be realized; if the detected value P of the internal air pressure of the battery pack is larger than the external atmospheric pressure P, the function of the power battery respirator can realize the release of the internal air pressure of the battery pack to the outside; if the pressure detection value P in the battery pack is less than P, the power battery respirator function can realize that the external atmospheric pressure of the battery pack is released to the inside of the battery pack, so that the balance between the internal air pressure and the external air pressure of the battery pack is realized, and the normal working air pressure environment of parts in the battery pack is protected.
The power battery respirator function is integrated to the multifunctional power battery sensor and is arranged on the power battery box body, so that the battery respirator can be independently arranged instead of the power battery box body, the number of parts of a power battery system is simplified, the processing steps of the power battery box body are simplified, and the corresponding cost is reduced.
The safety explosion-proof valve is arranged inside the multifunctional power battery sensor, and can be communicated with the internal cavity of the power battery box and the external atmospheric environment of the power battery system when the safety explosion-proof valve cavity is opened.
Safety explosion-proof valve function of power battery: in particular to releasing high-temperature high-pressure air in a power battery box body. When the inside of the power battery box body is abnormally high in temperature and high in pressure, the power battery safety explosion-proof valve is opened for directional explosion, high-temperature and high-pressure gas in the inside of the power battery box body is timely dredged and released to the outside of the power battery box body, the thermal runaway risk of a power battery system is greatly reduced, and the thermal runaway safety of a whole vehicle passenger is protected.
When the power battery safety explosion-proof valve is opened, an opening signal is sent to a power battery management system BMS, the power battery management system BMS sends the opening signal to a whole vehicle controller VCU after judgment, and the whole vehicle controller VCU sends the opening signal to a whole vehicle display device after judgment, so that a user of the whole vehicle is informed that the current safety explosion-proof state of the power battery is abnormal, and the thermal runaway risk of the power battery system is controlled to be minimum.
The power battery safety explosion-proof valve is integrated to the power battery multifunctional sensor and is arranged on the power battery box body, the safety explosion-proof valve can be independently arranged instead of the power battery box body, the number of the explosion-proof valves is reduced, the number of parts of a power battery system is simplified, the processing steps and the installation steps of the power battery box body are simplified, and the corresponding cost is reduced.
Power battery humidity sensor function: specifically, the humidity of the closed gas in the power battery box body is monitored. When the humidity detection value of the closed gas in the power battery box body is larger than the design threshold value, the abnormal humidity of the power battery is judged, the normal operation of the power battery module and other electrical components can be possibly influenced, and insulation failure and even potential safety hazards are caused. The battery humidity sensor performs signal interaction with the power battery management system BMS, and the power battery management system BMS starts the power battery dehumidifier function after confirming the abnormal information reported by the power battery humidity sensor; further, signal interaction is carried out with the whole vehicle display device, so that the signal interaction between the power battery system and the whole vehicle passenger is realized.
The power battery humidity sensor is integrated to the power battery multifunctional sensor and is arranged in the power battery box body, so that the battery humidity sensor can be independently arranged in the power battery box body instead of the power battery box body, the number of parts of the power battery system is simplified, the processing steps and the mounting steps of the power battery box body are simplified, and the corresponding cost is reduced.
Power battery dehumidifier function: specifically, when the humidity detection value of the closed gas in the power battery box body is greater than the design threshold value, the closed gas in the power battery box body is dehumidified, so that the power battery module and other electrical components in the power battery box body can work normally, insulation faults are avoided, and potential safety hazards caused by phenomena of small amount of water immersion, condensation and the like caused by special working conditions in the power battery box body are reduced.
When the humidity detection value of the closed gas in the power battery box body is more than the design threshold value, the power battery humidity sensor reports an abnormal signal to the power battery management system BMS, the power battery management system BMS controls the power battery dehumidifier to be started, the humidity in the power battery box body is reduced, the normal insulating state in the power battery box body is protected, the reliability and the safety of power battery parts are improved, and the running reliability and the running safety of the power battery and the whole vehicle are further improved.
When the humidity detection value of the closed gas in the power battery box body is more than the design threshold value, a plurality of dehumidification packages can be arranged through the multifunctional sensor of the power battery, when the humidity in the power battery box body is abnormal, the power battery dehumidifier automatically dehumidifies, signal interaction with the power battery management system BMS is not needed, and the power battery management system BMS is not needed to control.
The multifunctional sensor structure comprises a multifunctional sensor structure, wherein at least one side wall of the multifunctional sensor structure is provided with a multifunctional sensor mounting mechanism of a power battery, and the multifunctional sensor mounting mechanism of the power battery is arranged on a power battery box body.
The multifunctional sensor structure is arranged on the power battery box body and is an embedded structure.
According to another embodiment of the present application, there is provided a vehicle including a power battery, which is the power battery in the above embodiment.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
the application provides a multifunctional power battery sensor, a design method and a control method thereof, which can integrate various sensor functions and executor functions (a power battery air pressure sensor, a power battery respirator, a power battery safety explosion-proof valve, a power battery humidity heat sensor and a power battery dehumidifier), simplify the number of parts of a power battery system and the processing steps of a power battery box body, and reduce the corresponding cost; the information interaction between a vehicle user and the whole vehicle can be realized through the control method of the multifunctional sensor of the power battery, the vehicle user can know the safety state of the power battery system in real time through the whole vehicle display device, and when the whole vehicle display device prompts dangerous alarm information prompt, the vehicle maintenance is performed in time; and the whole vehicle display device timely withdraws the vehicle when giving a thermal runaway alarm. The design method and the control method of the multifunctional sensor of the power battery can effectively reduce the safety risk in the whole vehicle driving process, and particularly reduce the safety risk of a whole vehicle user caused by thermal runaway of the power battery.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application, as generally described. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A power cell characterized in that the power cell comprises a multi-functional sensor structure (41), the multi-functional sensor structure (41) being electrically connected with a battery management system (31) of the power cell, the multi-functional sensor structure (41) comprising:
a plate-like main body structure (51), the plate-like main body structure (51) being connected to the case (21) of the power battery; the utility model discloses a battery management system, including box (21) including box, safety explosion-proof valve (411), humidity transducer (414), dehumidifier (415), plate-like body structure (51) orientation at least be provided with on one side of box (21) atmospheric pressure sensor (411), safety explosion-proof valve (413), humidity transducer (414), dehumidifier (415) are all with box (21) inside intercommunication on one side of box (21), respirator (412) with box (21) inside intercommunication, respirator (412) are used for balancing the atmospheric pressure environment of box (21) inside, atmospheric pressure sensor (411) are used for detecting the atmospheric pressure of box (21) inside, humidity transducer (414) are used for detecting humidity of box (21) inside, humidity transducer (414) dehumidifier (415) all with box (21) inside intercommunication, atmospheric pressure sensor (411), safety explosion-proof valve (413), humidity transducer (414), dehumidifier (415) and battery management system (31) all electric connection.
2. The power battery according to claim 1, characterized in that the plate-like main body structure (51) is provided with a multifunctional sensor mounting mechanism (417) on both sides in the longitudinal direction, and the plate-like main body structure (51) is connected to the case (21) through the multifunctional sensor mounting mechanism (417).
3. The power battery according to claim 1, characterized in that a boss structure is provided on one side of the plate-shaped main body structure (51) toward the case (21), the boss structure is arranged to extend in a longitudinal direction of the plate-shaped main body structure (51), the air pressure sensor (411) is arranged to protrude on the boss structure, the dehumidifier (415) is integrally arranged inside the boss structure, the humidity sensor (414) is arranged at the top of the dehumidifier (415), and the air pressure sensor (411) and the humidity sensor (414) are arranged at intervals in the longitudinal direction of the boss structure.
4. A power cell according to claim 3, characterized in that the safety explosion-proof valve (413) is arranged close to the boss structure, the end of the safety explosion-proof valve (413) is provided with a gas-guiding channel, the gas-guiding channel is communicated with the interior of the box body (21), and when the valve core of the safety explosion-proof valve (413) is in an open state, the interior of the box body (21) is communicated with the external environment through the gas-guiding channel.
5. The power cell as claimed in claim 4, characterized in that the safety explosion-proof valve (413) is provided integrally with the boss structure.
6. A power cell according to claim 3, wherein a cavity is formed in the boss structure, at least one via hole is formed in a top side wall of the cavity, at least one of a connection harness of the air pressure sensor (411), a connection harness of the safety explosion-proof valve (413), a connection harness of the humidity sensor (414), a connection harness of the dehumidifier (415), and a connection harness of the respirator (412) passes through the via hole and is wound to form a quick wire harness terminal (416), and the quick wire harness terminal (416) is electrically connected with the battery management system (31).
7. The power cell as claimed in claim 4, wherein the breather (412) and the safety explosion-proof valve (413) are provided on both sides in the thickness direction of the same end of the plate-like main body structure (51).
8. The power cell of claim 1, wherein the respirator (412) is internally provided with a breathable film membrane made of polytetrafluoroethylene.
9. The power battery according to claim 1, wherein the plurality of multi-functional sensor structures (41) are provided, the plurality of multi-functional sensor structures (41) are disposed at intervals along the circumferential side wall of the case (21), the plurality of multi-functional sensor structures (41) are all connected with the case (21), and the plurality of multi-functional sensor structures (41) are all electrically connected with the battery management system (31).
10. A vehicle comprising a power battery, characterized in that the power battery is the power battery according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778779.9A CN116666795A (en) | 2023-06-28 | 2023-06-28 | Power battery and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778779.9A CN116666795A (en) | 2023-06-28 | 2023-06-28 | Power battery and vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116666795A true CN116666795A (en) | 2023-08-29 |
Family
ID=87728027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310778779.9A Pending CN116666795A (en) | 2023-06-28 | 2023-06-28 | Power battery and vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116666795A (en) |
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2023
- 2023-06-28 CN CN202310778779.9A patent/CN116666795A/en active Pending
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