CN115447389A - Battery safety monitoring system, battery assembly and electric vehicle - Google Patents
Battery safety monitoring system, battery assembly and electric vehicle Download PDFInfo
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- CN115447389A CN115447389A CN202211071899.7A CN202211071899A CN115447389A CN 115447389 A CN115447389 A CN 115447389A CN 202211071899 A CN202211071899 A CN 202211071899A CN 115447389 A CN115447389 A CN 115447389A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 42
- 238000004088 simulation Methods 0.000 claims abstract description 62
- 238000009413 insulation Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Sustainable Energy (AREA)
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- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a battery safety monitoring system, a battery assembly and an electric vehicle. A battery safety monitoring system comprising: the battery comprises an acquisition module, a simulation module and an output module, wherein the acquisition module is in signal connection with the battery body and is used for acquiring working parameters of the battery body in real time; the simulation module comprises a virtual model for simulating the battery body, is in signal connection with the acquisition module, and simulates the virtual model in real time based on the working parameters of the battery body to obtain a corresponding simulated cloud picture; the output module is in signal connection with the simulation module and is used for outputting at least one of the simulation cloud picture and battery state information corresponding to the simulation cloud picture in real time. In the invention, the simulated cloud picture can intuitively display the state information of each electric core in the battery body and the state information of each part of the electric core, and can accurately predict how to control the temperature of the battery body so as to prolong the service life of the battery body.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a battery safety monitoring system, a battery assembly and an electric vehicle.
Background
The power battery is used as a key core part of the new energy automobile, and safety state monitoring is very important. At present, the safety state monitoring of a battery assembly is directly monitored through a Battery Management System (BMS), and the monitoring mode through the BMS has the following problems: the safety state of the battery assembly cannot be intuitively known, and the accuracy is poor.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The invention mainly aims to provide a battery safety monitoring system, a battery assembly and an electric vehicle, so as to solve the problem that the safety state of the battery assembly cannot be intuitively and accurately monitored at present.
In order to achieve the above object, according to one aspect of the present invention, there is provided a battery safety monitoring system including: the acquisition module is in signal connection with the battery body and is used for acquiring working parameters of the battery body in real time; the simulation module comprises a virtual model for simulating the battery body, is in signal connection with the acquisition module, and simulates the virtual model in real time based on the working parameters of the battery body to obtain a corresponding simulated cloud picture; and the output module is in signal connection with the simulation module and is used for outputting at least one of the simulation cloud picture and the battery state information corresponding to the simulation cloud picture in real time.
Further, the output module includes: and the display unit is in signal connection with the simulation module and is used for displaying the simulation cloud picture corresponding to the virtual model.
Further, the output module further comprises: and the storage unit is in signal connection with the simulation module and converts the simulation cloud picture into working condition information and stores the working condition information.
Further, the output module further comprises: and the interface unit is in signal connection with the simulation module and converts the simulation cloud picture into a data signal and transmits the data signal.
Further, the acquisition module can select a battery management system, a pre-embedded big data system or a sensor.
Further, the operating parameters of the battery body at least include battery temperature, battery current, battery voltage and battery insulation resistance.
Further, the simulated cloud picture is obtained by performing simulation based on a single working parameter at the same time.
Further, the simulated cloud picture is obtained by performing simulation based on a plurality of working parameters at the same time.
According to another aspect of the present invention, a battery assembly is provided, which includes a battery safety monitoring system as described above.
According to another aspect of the present invention, there is provided an electric vehicle including a battery safety monitoring system, the battery safety monitoring system being the above-mentioned battery safety monitoring system.
According to the technical scheme, the acquisition module, the simulation module and the output module jointly form a digital twin system, the acquisition module acquires working parameters of the battery body in real time and inputs the acquired working parameters into the simulation module, the simulation module simulates the virtual model in real time based on the working parameters to obtain a simulated cloud picture, and the simulated cloud picture and battery state information corresponding to the simulated cloud picture can be output through the output module. The simulated cloud picture simulated by the simulation module can visually show the state information of each electric core in the battery body and the state information of each part of the electric core, compared with the traditional monitoring mode, the monitoring method not only can obtain the highest temperature of the electric core and the lowest temperature of the battery, but also can obtain the temperature state information of each part of each electric core, the position information of high and low temperatures and the occupied area size of the high and low temperatures, and can accurately judge how to control the temperature of the battery body so as to prolong the service life of the battery body when the battery body is visually observed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a block diagram of the structure of an embodiment of a battery safety monitoring system according to the present invention;
fig. 2 is a schematic view showing a structure of a battery body according to an alternative embodiment of the present invention;
FIG. 3 illustrates a schematic diagram of a simulated cloud in accordance with an alternative embodiment of the present invention;
fig. 4 is a schematic diagram illustrating temperature variation curves of the upper and lower surfaces of a single cell according to an alternative embodiment of the present invention.
Wherein the figures include the following reference numerals:
1. an electric core; 2. and (4) conducting wires.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
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 example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements 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 only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1 to 4, according to an embodiment of the present application, a battery safety monitoring system is provided.
Specifically, the battery safety monitoring system includes: the device comprises an acquisition module, a simulation module and an output module. The acquisition module is in signal connection with the battery body and is used for acquiring working parameters of the battery body in real time. The simulation module comprises a virtual model used for simulating the battery body, the simulation module is in signal connection with the acquisition module, and the simulation module simulates the virtual model in real time based on the working parameters of the battery body and obtains a corresponding simulated cloud picture. The output module is in signal connection with the simulation module and is used for outputting at least one of the simulation cloud picture and battery state information corresponding to the simulation cloud picture in real time.
It should be noted that, the size ratio of the virtual model in the simulation module is consistent with the actual size ratio of the battery body, and the virtual model can see through each battery cell 1 inside the battery body. The simulated cloud picture is established on the basis of a virtual model, the heat distribution of each region of the virtual model is presented under the action of working parameters, the heat is generally presented by colors, red and orange represent higher temperature, blue and green represent lower temperature, and the temperature information of each part of the battery body is visually presented.
In the embodiment of the application, the acquisition module, the simulation module and the output module jointly form a digital twin system, the acquisition module acquires working parameters of the battery body in real time and inputs the acquired working parameters into the simulation module, the simulation module simulates the virtual model in real time based on the working parameters to obtain a simulated cloud picture, and the simulated cloud picture and battery state information corresponding to the simulated cloud picture can be output through the output module. The simulated cloud picture simulated by the simulation module can visually show the state information of each electric core in the battery body and the state information of each part of the electric core 1, compared with the traditional monitoring mode, the monitoring method not only can obtain the highest temperature of the electric core and the lowest temperature of the battery, but also can obtain the temperature state information of each part of each electric core, the position information of high and low temperatures and the occupied area size of the high and low temperatures, and when the battery body is visually observed, the monitoring method can accurately predict how to control the temperature of the battery body so as to prolong the service life of the battery body.
Furthermore, the output module comprises a display unit, the display unit is in signal connection with the simulation module, and the display unit is used for displaying the simulation cloud picture corresponding to the virtual model. The display unit may be a touch screen type liquid crystal display, and a user may perform user interface interaction by touching the liquid crystal display, for example, the user clicks a screen of the liquid crystal display, and a specific temperature value at a corresponding position and other related operating parameter values may pop up on a graphical interface of the liquid crystal display.
Furthermore, the output module further comprises a storage unit, the storage unit is in signal connection with the simulation module, and the storage unit converts the simulated cloud pictures into working condition information and stores the working condition information. The storage unit may include a high-speed random access memory, and may further include a non-volatile memory, such as one or more magnetic storage devices, a flash memory, or other non-volatile solid-state memory. Specifically, the operating condition information includes position information, temperature information, current information, voltage information, and other related information of each battery cell in the battery body, and the storage unit may further integrate the temperature information and the other operating condition information, and form a temperature change curve, for example, a change curve of the battery cell temperature with time, a change curve of the battery cell temperature with current, and the like.
Furthermore, the output module also comprises an interface unit, the interface unit is in signal connection with the simulation module, and the interface unit converts the simulation cloud picture into a data signal and transmits the data signal. The interface unit can be connected with other hardware equipment through a hardware interface, such as a USB interface, and collects data of the battery body so as to analyze, debug or modify the battery body. The interface unit may also be a software interface, such as a network adapter that is connected to other network devices through the base station so as to communicate with the internet.
Further, the acquisition module can be a battery management system, a pre-embedded big data system or a sensor. In this embodiment, the collection module is a sensor, and different types of sensors, such as a temperature sensor, a voltage sensor, a current sensor, etc., are set according to the demand parameters, and the working parameters of the battery body are collected through the sensor.
Further, the operating parameters of the battery body at least include battery temperature, battery current, battery voltage and battery insulation resistance. Except for measuring the battery temperature, the battery current, the battery voltage and the battery insulation resistance value are also indispensable, the battery current, the battery voltage and the battery insulation resistance value can reflect the service state of the battery body, and the service state of the battery body is different and affects the battery temperature.
The simulated cloud picture can be obtained by simulating based on a single working parameter at the same time. For example, simulation is performed according to the battery temperature or the battery current, which is a simple simulation method, but due to mutual influence of various working parameters, the obtained simulation result may have a phenomenon of low accuracy.
In order to improve the accuracy of the simulation result, the simulated cloud picture is obtained by performing simulation based on a plurality of working parameters at the same time. For example, the simulation is performed according to relevant operating parameters such as battery temperature, battery current, battery voltage, and battery insulation resistance.
According to another embodiment of the present application, as shown in fig. 2 to 4, the battery cells 1 inside the battery body are connected in parallel through the wires 2, and the virtual module established in the simulation module is consistent with the size of the battery body shown in fig. 2. Each sensor in the acquisition module acquires the actual working parameters of the battery body in real time, and inputs the acquired working parameters into the simulation module, and the simulation module performs real-time simulation on the established virtual module to obtain a corresponding simulation cloud picture, which is also a temperature cloud picture of the battery body, as shown in fig. 3.
As shown in fig. 3, red and orange represent higher temperatures, and blue and green represent lower temperatures, wherein the color bars of the simulated cloud map are correspondingly marked with temperature values, and the temperature values are expressed in degrees centigrade (deg.c), so as to intuitively display the temperature information of each part of the battery body. Specifically, the color change from 25 ℃ to 40 ℃ is: from dark blue to light blue to green, the color change from 40 ℃ to 50 ℃ is: from light orange to dark orange to red.
As can be seen from fig. 3, the lower half of the battery body has a lower temperature, ranging from deep blue to light blue to green, with the corresponding temperature range centered between 25 ℃ and 40 ℃. The temperature of the upper half part of the battery body is higher, the color is changed from light orange to dark orange to red, and the corresponding temperature range is concentrated between 40 ℃ and 50 ℃, namely the temperature of the upper surface of the battery body is the highest, and the temperature of the lower surface of the battery body is the lowest.
The user can cool down battery body according to the temperature distribution on the emulation cloud picture, and the velocity of flow of the coolant in the cooling plate is greater than the velocity of flow of coolant in the cooling plate down in setting up, when cooling down battery body, can make the temperature of each position of battery body unanimous fast to improve battery body's life.
As can be seen from fig. 3, the temperature distribution of each of the battery cells 1 in the battery body is uniform, and it is further obtained that the use states of the respective battery cells 1 are substantially uniform.
The storage unit converts the simulation cloud picture of fig. 3 into the working condition information of a single battery cell 1 for storage, and integrates the working condition information of the battery cell into a form of a change curve. As shown in fig. 4, the abscissa corresponds to a battery current, the unit of the battery current is milliampere (mA), the ordinate corresponds to a temperature value, and the unit of the temperature value is celsius degrees (deg.c).
The upper curve S1 in fig. 4 is a variation curve of the upper surface temperature of the battery cell 1, and along with the increase of the battery current, the upper surface temperature of the battery cell 1 gradually increases, and the variation range is large, that is, the upper surface temperature of the battery cell 1 is greatly influenced by the battery current.
The lower curve S2 in fig. 4 is a temperature variation curve of the lower surface of the battery cell 1, and the temperature of the lower surface of the battery cell is generally in a downward trend along with the increase of the battery current. Specifically, the temperature of the lower surface of the battery cell 1 is first reduced and then gradually increased: the lower surface temperature of the battery cell 1 gradually decreases during the change in the battery current from 0 to 2000mA, and particularly, the lower surface temperature of the battery cell 1 rapidly decreases during the change in the battery current from 0 to 1000 mA. During the change of the battery current from 2000mA to 9000mA, the temperature of the lower surface of the battery cell 1 gradually increases, but is still lower than the initial temperature. In a whole view, the variation range of the curve S2 is small, that is, the temperature of the lower surface of the battery cell 1 is less influenced by the battery current. The interface in fig. 4 is a grid interface, and can more accurately correspond to the temperature values of the battery core 1 under different battery currents.
The user can adjust the velocity of flow in the last cooling plate of battery body and the lower liquid cooling board according to the change of battery current to the realization is to the cooling of battery body.
According to another embodiment of the present application, a battery assembly is provided, which includes a battery safety monitoring system, and the battery safety monitoring system is the battery safety monitoring system in the above embodiment.
According to another embodiment of the present application, there is provided an electric vehicle including a battery safety monitoring system, the battery safety monitoring system being the battery safety monitoring system in the above-described embodiment.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same 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 submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A battery safety monitoring system, comprising:
the acquisition module is in signal connection with the battery body and is used for acquiring working parameters of the battery body in real time;
the simulation module comprises a virtual model for simulating the battery body, is in signal connection with the acquisition module, and simulates the virtual model in real time based on working parameters of the battery body to obtain a corresponding simulated cloud picture;
and the output module is in signal connection with the simulation module and is used for outputting at least one of the simulation cloud picture and battery state information corresponding to the simulation cloud picture in real time.
2. The battery safety monitoring system according to claim 1, wherein the output module comprises:
and the display unit is in signal connection with the simulation module and is used for displaying the simulation cloud picture corresponding to the virtual model.
3. The battery safety monitoring system according to claim 1, wherein the output module further comprises:
and the storage unit is in signal connection with the simulation module and converts the simulation cloud picture into working condition information and stores the working condition information.
4. The battery safety monitoring system according to claim 1, wherein the output module further comprises:
and the interface unit is in signal connection with the simulation module and converts the simulation cloud picture into a data signal and transmits the data signal.
5. The battery safety monitoring system according to claim 1, wherein the collection module is selected from a battery management system, a pre-embedded big data system, or a sensor.
6. The battery safety monitoring system according to claim 1, wherein the operating parameters of the battery body include at least a battery temperature, a battery current, a battery voltage, and a battery insulation resistance value.
7. The battery safety monitoring system according to any one of claims 1-6, wherein the simulated cloud images are obtained by simulation based on a single operating parameter at the same time.
8. The battery safety monitoring system according to any one of claims 1-6, wherein the simulated cloud is obtained by simulation based on a plurality of the operating parameters at the same time.
9. A battery assembly comprising a battery safety monitoring system, wherein the battery safety monitoring system is the battery safety monitoring system of any one of claims 1-8.
10. An electric vehicle comprising a battery safety monitoring system, characterized in that the battery safety monitoring system is the battery safety monitoring system of any one of claims 1-8.
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| CN202211071899.7A CN115447389A (en) | 2022-09-02 | 2022-09-02 | Battery safety monitoring system, battery assembly and electric vehicle |
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| CN202211071899.7A CN115447389A (en) | 2022-09-02 | 2022-09-02 | Battery safety monitoring system, battery assembly and electric vehicle |
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| CN109145394A (en) * | 2018-07-27 | 2019-01-04 | 北京新能源汽车股份有限公司 | A kind of display methods of temperature of powered cell field, apparatus and system |
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| CN114757038A (en) * | 2022-04-21 | 2022-07-15 | 中汽研（天津）汽车工程研究院有限公司 | Power battery thermal diffusion simulation method based on electric-thermal coupling |
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2022
- 2022-09-02 CN CN202211071899.7A patent/CN115447389A/en active Pending
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| CN109145394A (en) * | 2018-07-27 | 2019-01-04 | 北京新能源汽车股份有限公司 | A kind of display methods of temperature of powered cell field, apparatus and system |
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