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CN117104002A - Power battery fault early warning method and device, storage medium and electronic device - Google Patents

Power battery fault early warning method and device, storage medium and electronic device Download PDF

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Publication number
CN117104002A
CN117104002A CN202311145970.6A CN202311145970A CN117104002A CN 117104002 A CN117104002 A CN 117104002A CN 202311145970 A CN202311145970 A CN 202311145970A CN 117104002 A CN117104002 A CN 117104002A
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CN
China
Prior art keywords
power battery
voltage
threshold
temperature
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311145970.6A
Other languages
Chinese (zh)
Inventor
马少东
孙焕丽
王书洋
李雪
许立超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Group Corp
Original Assignee
FAW Group Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAW Group Corp filed Critical FAW Group Corp
Priority to CN202311145970.6A priority Critical patent/CN117104002A/en
Publication of CN117104002A publication Critical patent/CN117104002A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a fault early warning method and device of a power battery, a storage medium and an electronic device, and relates to the technical field of vehicles. Wherein the method comprises the following steps: acquiring a charging state, a voltage value and a temperature value of a power battery; judging the charging state to obtain a first judging result, wherein the first judging result is used for indicating whether the charging state is normal or not; responding to the first judgment result to represent abnormal charging state, judging the voltage value and the temperature value to obtain a second judgment result, wherein the second judgment result is used for determining the fault level of the power battery; and determining an early warning strategy based on the second judging result. The invention solves the technical problems of lower efficiency, lower accuracy, lower safety and lower anti-interference performance caused by the fact that the change of voltage and temperature when the battery is overcharged is observed by artificially applying the overcharged condition to the battery and the characteristics when the battery is overcharged are monitored in the related technology.

Description

Power battery fault early warning method and device, storage medium and electronic device
Technical Field
The invention relates to the technical field of vehicles, in particular to a fault early warning method and device for a power battery, a storage medium and an electronic device.
Background
With the rapid development of vehicle technology, thermal runaway of a battery becomes a core safety problem to be solved in the development process of a pure electric vehicle, and a series of battery side reactions, such as structural collapse of a positive electrode material, decomposition of electrolyte or precipitation of lithium, can be caused by overcharge, so that aging of the battery is accelerated, and even thermal runaway is caused. Therefore, a fault early warning method for the power battery is necessary.
At present, the change of voltage and temperature during overcharge of a battery is observed by artificially applying overcharge conditions to the battery, so that the characteristic of the battery during overcharge is monitored, but the method stays in a laboratory stage and requires artificial conditions, so that the efficiency is low, the accuracy is low, the safety is low and the anti-interference performance is low.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a fault early warning method and device for a power battery, a storage medium and an electronic device, which at least solve the technical problems of lower efficiency, lower accuracy, lower safety and lower anti-interference performance caused by monitoring the characteristics of the battery when the battery is overcharged by artificially applying an overcharged condition to the battery to observe the voltage and temperature change of the battery in the related technology.
According to one embodiment of the present invention, there is provided a fault early warning method for a power battery, including: acquiring a charging state, a voltage value and a temperature value of a power battery; judging the charging state to obtain a first judging result, wherein the first judging result is used for indicating whether the charging state is normal or not; responding to the first judgment result to represent abnormal charging state, judging the voltage value and the temperature value to obtain a second judgment result, wherein the second judgment result is used for determining the fault level of the power battery; and determining an early warning strategy based on the second judging result.
Optionally, determining the voltage value and the temperature value to obtain a second determination result includes: acquiring a voltage change rate, a first voltage threshold and a first temperature threshold of a power battery; and responding to the voltage value being smaller than or equal to the first voltage threshold value, wherein the voltage change rate is larger than a preset threshold value, the temperature value is smaller than or equal to the first temperature threshold value, determining the fault grade as the first fault grade, and obtaining a second judging result.
Optionally, the method further comprises: acquiring a second voltage threshold and a second temperature threshold of the power battery; and determining that the fault level is a second fault level in response to the voltage value being greater than the first voltage threshold and less than or equal to the second voltage threshold and the voltage change rate being greater than a preset threshold, or the temperature value being greater than the first temperature threshold and less than or equal to the second temperature threshold, and obtaining a second judgment result.
Optionally, the method further comprises: acquiring a temperature rise rate, a third voltage threshold and a third temperature threshold of the power battery; and determining that the fault grade is a third fault grade according to the fact that the voltage value is larger than the second voltage threshold and smaller than or equal to the third voltage threshold and the voltage change rate is larger than a preset threshold or the temperature value is larger than the second temperature threshold and smaller than or equal to the third temperature threshold and the temperature rise rate is larger than the first rate threshold, and obtaining a second judging result.
Optionally, the method further comprises: acquiring a fourth voltage threshold and a fourth temperature threshold of the power battery; responding to the voltage value being larger than the third voltage threshold value and smaller than or equal to the fourth voltage threshold value and the voltage change rate being larger than the preset threshold value, or determining the fault level as a fourth fault level when the temperature value is larger than the third temperature threshold value and the temperature rise rate is larger than the second rate threshold value, and obtaining a second judging result; the fourth voltage threshold is larger than the third voltage threshold and larger than the second voltage threshold and larger than the first voltage threshold, the third temperature threshold is larger than the second temperature threshold and larger than the first temperature threshold, the second speed threshold is larger than the first speed threshold, and the fourth fault level is higher than the third fault level and higher than the second fault level.
Optionally, the method further comprises: acquiring static data of a power battery; judging the battery type of the power battery according to the static data; a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power battery are determined based on the battery type.
Optionally, the method further comprises: the method comprises the steps of responding to the fact that the battery type of the power battery cannot be judged according to static data, and obtaining the single voltage of the power battery; the battery type of the power battery is determined according to the cell voltage.
According to an embodiment of the present invention, there is also provided a fault early warning device for a power battery, including: the acquisition module is used for acquiring the charging state, the voltage value and the temperature value of the power battery; the first judging module is used for judging the charging state to obtain a first judging result, wherein the first judging result is used for indicating whether the charging state is normal or not; the second judging module is used for judging the voltage value and the temperature value to obtain a second judging result in response to the fact that the first judging result indicates whether the charging state is abnormal or not, wherein the second judging result is used for determining the fault level of the power battery; the determining module is used for determining an early warning strategy based on the second judging result.
Optionally, the second judging module is further configured to obtain a voltage change rate of the power battery, a first voltage threshold value, and a first temperature threshold value; and responding to the voltage value being smaller than or equal to the first voltage threshold value, wherein the voltage change rate is larger than a preset threshold value, the temperature value is smaller than or equal to the first temperature threshold value, determining the fault grade as the first fault grade, and obtaining a second judging result.
Optionally, the second judging module is further configured to obtain a second voltage threshold and a second temperature threshold of the power battery; and determining that the fault level is a second fault level in response to the voltage value being greater than the first voltage threshold and less than or equal to the second voltage threshold and the voltage change rate being greater than a preset threshold, or the temperature value being greater than the first temperature threshold and less than or equal to the second temperature threshold, and obtaining a second judgment result.
Optionally, the second judging module is further configured to obtain a temperature rise rate of the power battery, a third voltage threshold value, and a third temperature threshold value; and determining that the fault grade is a third fault grade according to the fact that the voltage value is larger than the second voltage threshold and smaller than or equal to the third voltage threshold and the voltage change rate is larger than a preset threshold or the temperature value is larger than the second temperature threshold and smaller than or equal to the third temperature threshold and the temperature rise rate is larger than the first rate threshold, and obtaining a second judging result.
Optionally, the second judging module is further configured to obtain a fourth voltage threshold and a fourth temperature threshold of the power battery; responding to the voltage value being larger than the third voltage threshold value and smaller than or equal to the fourth voltage threshold value and the voltage change rate being larger than the preset threshold value, or determining the fault level as a fourth fault level when the temperature value is larger than the third temperature threshold value and the temperature rise rate is larger than the second rate threshold value, and obtaining a second judging result; the fourth voltage threshold is larger than the third voltage threshold and larger than the second voltage threshold and larger than the first voltage threshold, the third temperature threshold is larger than the second temperature threshold and larger than the first temperature threshold, the second speed threshold is larger than the first speed threshold, and the fourth fault level is higher than the third fault level and higher than the second fault level.
Optionally, the acquiring module is further configured to acquire static data of the power battery; judging the battery type of the power battery according to the static data; a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power battery are determined based on the battery type.
Optionally, the obtaining module is further configured to obtain a single voltage of the power battery in response to the inability to determine the battery type of the power battery according to the static data; the battery type of the power battery is determined according to the cell voltage.
According to an embodiment of the present application, there is also provided a vehicle for performing the failure warning method of the power battery in any one of the above.
According to one embodiment of the present application, there is also provided a computer-readable storage medium in which a computer program is stored, wherein the computer program is configured to perform the failure warning method of the power battery in any one of the above when running on a computer or a processor.
According to one embodiment of the present application, there is also provided an electronic device including a memory, in which a computer program is stored, and a processor configured to run the computer program to perform the failure warning method of the power battery in any one of the above.
In the embodiment of the application, the charging state, the voltage value and the temperature value of the power battery are obtained, so that a first judging result is obtained, wherein the first judging result is used for indicating whether the charging state is normal or not, and the voltage value and the temperature value are judged in response to the first judging result indicating that the charging state is abnormal, so that a second judging result is obtained, wherein the second judging result is used for determining the faults of the power battery and the like, and finally, an early warning strategy is determined based on the second judging result, so that the comprehensive judgment can be carried out according to the charging state, the voltage value and the temperature value of the battery, the battery overcharge early warning is separated from the constraint of a laboratory, the online early warning is realized, the early warning is simultaneously carried out, the early warning is effectively prevented before the occurrence of a safety accident through early warning reminding, the efficiency is higher, the accuracy is higher, the safety is higher, the anti-interference performance is higher, and the technical problems that the efficiency is lower, the accuracy is lower, and the anti-interference performance is lower when the battery overcharge is monitored by artificially applying the overcharge condition to the battery are 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 and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a power cell failure warning method according to one embodiment of the present application;
fig. 2 is a block diagram of a failure determination system of a power battery according to one embodiment of the present application;
FIG. 3 is a flow chart of a method for warning of failure of a power battery according to one embodiment of the present application;
fig. 4 is a block diagram illustrating a power battery failure warning apparatus according to one embodiment of the present application.
Detailed Description
For ease of understanding, a description of some of the concepts related to the embodiments of the application are given by way of example for reference.
The following is shown:
state of Charge (SOC) of the battery: i.e., the proportional relationship between the electrical energy stored in the battery and its rated capacity, SOC is expressed as a percentage, representing the percentage of the battery that has been charged. For example, a battery SOC of 50% indicates that the battery has been charged to half its rated capacity, and SOC is an important indicator for measuring the remaining battery power and can be used to determine the battery usage and charging requirements.
Battery management system (Battery Management System, BMS for short): the BMS is a core control system of the power battery, and can monitor parameters such as voltage, current, temperature and the like of the battery in real time, so that the charging state of the battery is known.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention 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 data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented 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.
According to one embodiment of the present invention, there is provided an embodiment of a power cell failure warning method, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order other than that shown.
The method embodiments may be performed in an electronic device, similar control device or system that includes a memory and a processor. Taking an electronic device as an example, the electronic device may include one or more processors and memory for storing data. Optionally, the electronic apparatus may further include a communication device for a communication function and a display device. It will be appreciated by those of ordinary skill in the art that the foregoing structural descriptions are merely illustrative and are not intended to limit the structure of the electronic device. For example, the electronic device may also include more or fewer components than the above structural description, or have a different configuration than the above structural description.
The processor may include one or more processing units. For example: the processor may include a processing device of a central processing unit (central processing unit, CPU), a graphics processor (graphics processing unit, GPU), a digital signal processing (digital signal processing, DSP) chip, a microprocessor (microcontroller unit, MCU), a programmable logic device (field-programmable gate array, FPGA), a neural network processor (neural-network processing unit, NPU), a tensor processor (tensor processing unit, TPU), an artificial intelligence (artificial intelligent, AI) type processor, or the like. Wherein the different processing units may be separate components or may be integrated in one or more processors. In some examples, the electronic device may also include one or more processors.
The memory may be used to store a computer program, for example, a computer program corresponding to the fault early warning method of the power battery in the embodiment of the present invention, and the processor implements the fault early warning method of the power battery by running the computer program stored in the memory. The memory may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, the memory may further include memory remotely located with respect to the processor, which may be connected to the electronic device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication device is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the communication device includes a network adapter (network interface controller, NIC) that can connect to other network devices through the base station to communicate with the internet. In one example, the communication device may be a Radio Frequency (RF) module for communicating with the internet wirelessly.
Display devices may be, for example, touch screen type liquid crystal displays (liquid crystal display, LCDs) and touch displays (also referred to as "touch screens" or "touch display screens"). The liquid crystal display may enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (graphical user interface, GUI) with which a user can interact with the GUI by touching finger contacts and/or gestures on the touch-sensitive surface, where the human-machine interaction functionality optionally includes the following interactions: executable instructions for performing the above-described human-machine interaction functions, such as creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, sending and receiving electronic mail, talking interfaces, playing digital video, playing digital music, and/or web browsing, are configured/stored in a computer program product or readable storage medium executable by one or more processors.
In this embodiment, a method for early warning of a fault of a power battery operating in an electronic device is provided, fig. 1 is a flowchart of a method for early warning of a fault of a power battery according to one embodiment of the present invention, as shown in fig. 1, and the flowchart includes the following steps:
Step S10, acquiring a charging state, a voltage value and a temperature value of a power battery;
it is understood that the state of charge, the voltage value and the temperature value of the power battery of the vehicle will change in real time with the charging time of the power battery when the power battery is charged, and this step may be understood as acquiring the state of charge, the voltage value and the temperature value of the power battery in the charging process in real time.
Wherein the state of charge, i.e. SOC, is used to indicate the percentage of the battery that has been charged, i.e. the SOC obtained should be in the form of a percentage. Alternatively, this step may be obtained by a management system in the vehicle, and embodiments of the present invention are not limited. By way of example, the state of charge, voltage value, and temperature value of the power battery may be obtained by a BMS in the vehicle, and embodiments of the present invention are not limited.
Specifically, the highest cell voltage of the power battery may be obtained as a voltage value by the BMS in the vehicle, and the highest probe temperature of the power battery may be obtained as a voltage value by the BMS in the vehicle.
Step S11, judging the charging state to obtain a first judgment result;
the first judgment result is used for indicating whether the charging state is normal or not.
The step can be understood as judging the charged percentage of the battery and judging whether the charged state of the power battery is normal or not, and can be understood as the charged state is generally in a percentage form, and when the value of the charged state is too high, the abnormal charged state of the power battery is indicated in the charging process.
Alternatively, the state of charge of the power battery may be determined by determining a percentage value of the state of charge, which is not limited in the embodiment of the present invention. For example, when the percentage value of the charging state is less than 100, it indicates that the charging capacity of the power battery at this time has not reached the full capacity of the battery, and the charging process is normal, i.e. the first determination result is normal. When the percentage value of the charging state exceeds 100, it indicates that the charging capacity of the power battery exceeds the full capacity of the battery and the charging process is still continuously charging, that is, the first judgment result is abnormal, and further fault judgment needs to be performed on the power battery.
Step S12, judging the voltage value and the temperature value in response to the first judgment result indicating that the charging state is abnormal, and obtaining a second judgment result;
the second judging result is used for determining the fault level of the power battery.
The step can be understood as that when the first judgment result indicates that the charging state is abnormal, the charging capacity of the power battery exceeds the full capacity of the battery at the moment, the charging is continued, the charging process is abnormal, and the voltage value and the temperature value are judged at the moment to determine the fault level of the power battery.
Optionally, in this step, the voltage value and the temperature value may be determined by acquiring a plurality of voltage thresholds and a plurality of temperature thresholds, and combining the voltage thresholds and the temperature thresholds to obtain the second determination result, which is not limited in the embodiment of the present invention. The voltage threshold and the temperature threshold corresponding to the fault level of the power battery may be obtained according to actual situations, and the fault level of the power battery may be determined by comparing the voltage value with the voltage thresholds, the temperature values and the temperature thresholds, respectively.
And S13, determining an early warning strategy based on the second judging result.
The early warning strategy can be understood as a strategy for prompting a user after the power battery has a charging fault, and optionally, after determining the fault level of the power battery, the early warning strategy can be determined according to the level of the fault level.
In an exemplary embodiment, when the fault level is the first level of the lowest level, the early warning policy may be determined to trigger the alarm prompt, when the fault level is the second level of the middle level, the early warning policy may be determined to trigger the alarm prompt, and the circuit of the power battery is automatically cut off, and when the fault level is the third level of the highest level, the early warning policy may be determined to trigger the alarm prompt, and the circuit of the power battery is automatically cut off, and meanwhile, the emergency cooling system is started.
Fig. 2 is a block diagram of a power cell failure determination system according to an embodiment of the present invention, and a specific implementation of the above steps is comprehensively described as shown in fig. 2. The power battery charging system comprises a first judging module, a voltage detecting module, a temperature detecting module and a second judging module, wherein the first judging module is used for judging whether the charging state of the power battery is normal, the voltage detecting module is used for detecting the voltage value of the power battery in the charging process in real time, the temperature detecting module is used for detecting the temperature value of the power battery in the charging process in real time, and the second judging module is used for judging the fault level of the power battery according to the voltage value and the temperature value.
When the system in fig. 2 is in operation, the first judging module is used for judging whether the charging state of the power battery is normal, when the charging state is abnormal, the voltage detecting module is used for detecting the voltage value of the power battery in the charging process in real time, the temperature detecting module is used for detecting the temperature value of the power battery in the charging process in real time, and the second judging module is used for judging the fault level of the power battery according to the voltage value and the temperature value, so that the fault determination of the power battery is completed.
Through the steps, the charging state, the voltage value and the temperature value of the power battery are obtained, the charging state is judged, a first judging result is obtained, the first judging result is used for indicating whether the charging state is normal or not, the voltage value and the temperature value are judged in response to the first judging result indicating that the charging state is abnormal, a second judging result is obtained, the second judging result is used for determining faults of the power battery and the like, and finally an early warning strategy is determined based on the second judging result, so that comprehensive judgment can be carried out according to the charging state, the voltage value and the temperature value of the battery, the battery overcharge early warning is separated from the constraint of a laboratory, on-line early warning is achieved, meanwhile, early warning can be sent out before the faults occur through early warning reminding, the occurrence of safety accidents is effectively prevented, the efficiency is high, the accuracy is high, the safety is high, the anti-interference performance is high, and the technical problems that the efficiency is low, the safety is low and the anti-interference performance is low when the battery overcharge is monitored by artificially applying overcharge conditions to the battery are solved.
Optionally, in step S10, the following steps may be further included:
step S100, static data of a power battery are obtained;
the static data of the power battery can be understood as structural data of the power battery, such as structural information of a material composition of the power battery, and the embodiment of the present invention is not limited. Alternatively, this step may detect static data of the power cell by means of a metal sensor.
Step S101, judging the battery type of the power battery according to static data;
it can be understood that with the rapid development of vehicle technology and new energy technology, the types of power batteries are gradually increased, and after the static data of the power batteries are obtained, the battery types of the power batteries can be judged according to the static data, namely the structure data, of the power batteries.
For example, when the metal sensor detects that the static data of the power battery indicates that the material of the power battery is configured as lithium iron phosphate, the type of the power battery may be determined as a lithium iron phosphate type power battery, and when the metal sensor detects that the static data of the power battery indicates that the material of the power battery is configured as ternary lithium, the type of the power battery may be determined as a ternary lithium type power battery, and the embodiment of the present invention is not limited.
Step S102, a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power battery are determined based on the battery type.
It can be understood that the different power batteries have different characteristics due to different constituent materials, so that a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power batteries are determined based on the battery types, so that the voltage thresholds and the temperature thresholds which are most suitable for the characteristics of the power batteries can be provided for the different power batteries, and further, more accurate judgment basis can be provided when the voltage values and the temperature values are judged later.
Optionally, in step S101, the following steps may be further included:
step S1010, obtaining the single voltage of the power battery in response to the failure to judge the battery type of the power battery according to the static data;
the step can be understood as obtaining the single voltage of the power battery when the battery type of the power battery cannot be judged according to the static data, for example, the material composition of the power battery cannot be accurately detected due to the influence of external environment, so that the battery type of the power battery cannot be judged.
Step S1011, determining the battery type of the power battery according to the cell voltage.
It can be understood that the different power battery types have different characteristics due to different constituent materials, and the single voltage is taken as one of the characteristics and can be taken as a judgment basis for determining the battery type of the power battery.
For example, the battery type of the power battery may be determined by determining whether the cell voltage is greater than a preset determination threshold, for example, may be 3.8v, which is not limited in the embodiment of the present invention. The battery type of the power battery is determined to be a ternary lithium type power battery when the cell voltage is greater than 3.8v, and the battery type of the power battery is determined to be a lithium iron phosphate type power battery when the cell voltage is less than or equal to 3.8v, so that the battery type of the power battery is determined, which is not limited in the embodiment of the invention.
Optionally, in step S12, determining the voltage value and the temperature value to obtain the second determination result may include the following steps:
step S120, obtaining a voltage change rate, a first voltage threshold and a first temperature threshold of the power battery;
the voltage change rate may be understood as a change rate of the voltage of the power battery during charging, alternatively, the voltage change rate of the battery may be obtained through a management system in the vehicle, which is not limited by the embodiment of the present invention. By way of example, the voltage change rate of the power battery may be obtained by a BMS in the vehicle, and the embodiment of the present invention is not limited.
The first voltage threshold may be understood as the highest voltage threshold at which the power battery is safely operated during charging, i.e. exceeding the highest voltage threshold, indicating that the power battery is too high in voltage during charging and that the power battery has a fault. The first temperature threshold may be understood as a maximum temperature threshold at which the power battery is safely operated during charging, i.e. above which the power battery is at too high a temperature during charging, which indicates that the power battery has a fault.
Alternatively, the first voltage threshold and the first temperature threshold may be determined according to a type of the power battery, which is not limited by the embodiment of the present invention. For example, when the type of the power battery is a ternary lithium type power battery, the first voltage threshold value may be set to 4.2v according to the voltage characteristics of the ternary lithium type power battery, and the first temperature threshold value may be set to 55 ℃ according to the temperature characteristics of the ternary lithium type power battery. When the type of the power battery is a lithium iron phosphate type power battery, the first voltage threshold may be set to 3.65v according to the voltage characteristic of the lithium iron phosphate type power battery, and the first temperature threshold may be set to 55 ℃ according to the temperature characteristic of the lithium iron phosphate type power battery, which is not limited in the embodiment of the present invention.
Step S121, in response to the voltage value being less than or equal to the first voltage threshold, the voltage change rate is greater than the preset threshold, and the temperature value is less than or equal to the first temperature threshold, determining the fault level as the first fault level, and obtaining the second determination result.
The preset threshold may be understood as a minimum voltage change rate threshold that determines that the power battery is being charged, and may be, for example, 0, and embodiments of the present invention are not limited. The first failure level may be understood as a safety level where no failure occurs, and embodiments of the present invention are not limited.
The step can be understood that when the voltage value is smaller than or equal to the highest voltage threshold value of the power battery which safely operates in the charging process, the change rate of the voltage is larger than the minimum voltage change rate threshold value of the power battery which is determined to be charging, and the temperature value is smaller than or equal to the highest temperature threshold value of the safe operation, the voltage value and the temperature value of the power battery are both in a safe state, the fault grade is determined to be the first fault grade, and the second judgment result is obtained.
When the power battery is of the ternary lithium type, if the voltage value is equal to or less than 4.2v, the voltage change rate is greater than 0, and the temperature value is equal to or less than 55 ℃, it is indicated that the voltage value and the temperature value of the power battery are both in a safe state, the fault level is determined to be the first fault level, and the second judgment result is obtained.
When the type of the power battery is a lithium iron phosphate power battery, if the voltage value is less than or equal to 3.65v, the voltage change rate is greater than 0, and the temperature value is less than or equal to 55 ℃, the voltage value and the temperature value of the power battery are both in a safe state, the fault grade is determined to be the first fault grade, and the second judgment result is obtained.
Optionally, in step S12, the following steps may be further included:
step S122, a second voltage threshold and a second temperature threshold of the power battery are obtained;
the second voltage threshold may be understood as the highest voltage threshold at which the power battery suffers a low-level fault during charging, i.e. exceeding the highest voltage threshold, indicating that the power battery is too high in voltage during charging and that the power battery suffers a medium-level fault. The second temperature threshold may be understood as a highest temperature threshold at which a low-level fault occurs in the power battery during charging, i.e. a temperature exceeding the highest temperature threshold, indicating that the temperature of the power battery is too high during charging, and that a medium-level fault exists in the power battery.
Alternatively, the second voltage threshold and the second temperature threshold may be determined according to a type of the power battery, which is not limited by the embodiment of the present invention. For example, when the type of the power battery is a ternary lithium type power battery, the second voltage threshold value may be set to 4.7v according to the voltage characteristic of the ternary lithium type power battery, and the second temperature threshold value may be set to 80 ℃ according to the temperature characteristic of the ternary lithium type power battery. When the type of the power battery is a lithium iron phosphate type power battery, the second voltage threshold may be set to 5v according to the voltage characteristics of the lithium iron phosphate type power battery, and the second temperature threshold may be set to 80 ℃ according to the temperature characteristics of the lithium iron phosphate type power battery, which is not limited in the embodiment of the present invention.
Step S123, in response to the voltage value being greater than the first voltage threshold and less than or equal to the second voltage threshold and the voltage change rate being greater than the preset threshold, or the temperature value being greater than the first temperature threshold and less than or equal to the second temperature threshold, determining the fault level as a second fault level, and obtaining a second judgment result.
The step can be understood that when the voltage value is greater than the highest voltage threshold value of the power battery which safely operates in the charging process and is less than or equal to the highest voltage threshold value of the low-level fault, the change rate of the voltage is greater than the minimum voltage change rate threshold value of the power battery which is determined to be being charged, or the temperature value is greater than the highest temperature threshold value of the safe operation and is less than or equal to the highest temperature threshold value of the low-level fault, the voltage value and the temperature value of the power battery are too high, the low-level fault of the power battery is indicated, the fault level is determined to be the second fault level, and the second judgment result is obtained.
When the power battery is of the ternary lithium type, if the voltage value is greater than 4.2v and less than or equal to 4.7v, the voltage change rate is greater than 0, or the temperature value is greater than 55 ℃ and less than or equal to 80 ℃, which indicates that the voltage value and the temperature value of the power battery are too high, the power battery has a low-level fault, the fault level is determined to be a second fault level, and a second judgment result is obtained.
When the type of the power battery is a lithium iron phosphate power battery, if the voltage value is greater than 3.65v and less than or equal to 5v, the voltage change rate is greater than 0, or the temperature value is greater than 55 ℃ and less than or equal to 80 ℃, which indicates that the voltage value and the temperature value of the power battery are too high, the power battery has low-level faults, the fault level is determined to be a second fault level, and a second judgment result is obtained.
Optionally, in step S12, the following steps may be further included:
step S124, obtaining a temperature rise rate, a third voltage threshold and a third temperature threshold of the power battery;
the rate of temperature rise of the power battery can be understood as the rate at which the temperature of the power battery rises during charging, and it can be understood that when the power battery has a fault, i.e., the temperature of the power battery is too high, the greater the rate of temperature rise, the more serious the fault and the lower the safety.
The third voltage threshold may be understood as a lowest voltage threshold at which the power battery has a high-level fault during charging, i.e. exceeding the highest voltage threshold, indicating that the power battery has a high-level fault during charging. The third temperature threshold may be understood as the lowest temperature threshold at which the power battery experiences an advanced fault during charging, i.e. exceeding the highest temperature threshold, indicating that the power battery is too hot during charging and that the power battery experiences an advanced fault.
Alternatively, the third voltage threshold and the third temperature threshold may be determined according to a type of the power battery, which is not limited by the embodiment of the present invention. For example, when the type of the power battery is a ternary lithium type power battery, the third voltage threshold value may be set to 5.07v according to the voltage characteristics of the ternary lithium type power battery, and the third temperature threshold value may be set to 90 ℃ according to the temperature characteristics of the ternary lithium type power battery. When the type of the power battery is a lithium iron phosphate type power battery, the third voltage threshold may be set to 5.51v according to the voltage characteristics of the lithium iron phosphate type power battery, and the third temperature threshold may be set to 90 ℃ according to the temperature characteristics of the lithium iron phosphate type power battery, which is not limited in the embodiment of the present invention.
And step S125, determining that the fault level is a third fault level in response to the voltage value being greater than the second voltage threshold and less than or equal to the third voltage threshold and the voltage change rate being greater than the preset threshold, or the temperature value being greater than the second temperature threshold and less than or equal to the third temperature threshold and the temperature rise rate being greater than the first rate threshold, and obtaining a second judgment result.
The first rate threshold may be understood as the lowest rate of temperature rise threshold that determines a power cell to experience a mid-level fault, for example, may be 0.03 ℃/min, i.e., the lowest rate of temperature rise threshold is exceeded, and the cell experiences a mid-level fault. The step can be understood that when the voltage value is greater than the highest voltage threshold value of the power battery with the middle-level fault in the charging process and less than or equal to the highest voltage threshold value of the power battery with the high-level fault, the change rate of the voltage is greater than the minimum voltage change rate threshold value of the power battery with the high-level fault, or the temperature value is greater than the highest temperature threshold value of the power battery with the middle-level fault and less than or equal to the highest temperature threshold value of the power battery with the high-level fault, and the temperature rise rate is greater than the lowest temperature rise rate threshold value of the power battery with the middle-level fault, the voltage value and the temperature value of the power battery are too high, the middle-level fault exists in the power battery, and the fault level is determined to be the third fault level, so that the second judgment result is obtained.
When the type of the power battery is a ternary lithium type power battery, if the voltage value is greater than 4.7v and less than or equal to 5.07v, the voltage change rate is greater than 0, or the temperature value is greater than 80 ℃ and less than or equal to 90 ℃, and meanwhile the temperature rise rate is greater than 0.03 ℃/min, at this time, the voltage value and the temperature value of the power battery are too high, the temperature rise rate is too high, the power battery has a medium-level fault, the fault level is determined to be a third fault level, and a second judgment result is obtained.
When the type of the power battery is a lithium iron phosphate type power battery, if the voltage value is greater than 5v and less than or equal to 5.51v, the voltage change rate is greater than 0, or the temperature value is greater than 80 ℃ and less than or equal to 90 ℃, and meanwhile the temperature rise rate is greater than 0.03 ℃/min, at the moment, the condition that the voltage value and the temperature value of the power battery are too high, the temperature rise rate is too high, the power battery has a medium-level fault, the fault level is determined to be a third fault level, and a second judgment result is obtained.
Optionally, in step S12, the following steps may be further included:
step S126, a fourth voltage threshold of the power battery is obtained;
the fourth voltage threshold may be understood as a lowest voltage threshold at which the power battery cannot normally operate during charging, i.e. a voltage exceeding the highest voltage threshold, indicating that the power battery is too high in voltage during charging, and the power battery cannot operate.
Alternatively, the fourth voltage threshold may be determined according to the type of power battery, and embodiments of the present invention are not limited. For example, when the type of the power battery is a ternary lithium type power battery, the fourth voltage threshold may be set to 5.34v according to the voltage characteristics of the ternary lithium type power battery. When the type of the power battery is a lithium iron phosphate type power battery, the fourth voltage threshold may be set to 5.8v according to the voltage characteristics of the lithium iron phosphate type power battery, and the embodiment of the present invention is not limited.
And step S127, determining that the fault level is a fourth fault level in response to the voltage value being greater than the third voltage threshold and less than or equal to the fourth voltage threshold and the voltage change rate being greater than the preset threshold, or the temperature value being greater than the third temperature threshold and the temperature rise rate being greater than the second rate threshold, and obtaining a second judgment result.
The fourth voltage threshold is larger than the third voltage threshold and larger than the second voltage threshold and larger than the first voltage threshold, the third temperature threshold is larger than the second temperature threshold and larger than the first temperature threshold, the second speed threshold is larger than the first speed threshold, and the fourth fault level is higher than the third fault level and higher than the second fault level.
The second rate threshold may be understood as the lowest rate of temperature rise threshold that determines an advanced failure of the power battery, for example, may be 1 ℃/min, i.e., exceeding the lowest rate of temperature rise threshold. The step can be understood that when the voltage value is greater than the highest voltage threshold value of the power battery with the advanced fault in the charging process and is less than or equal to the lowest voltage threshold value which cannot work normally, the change rate of the voltage is greater than the minimum voltage change rate threshold value which determines that the power battery is being charged, or the temperature value is greater than the highest temperature threshold value with the advanced fault, and the temperature rise rate is greater than the lowest temperature rise rate threshold value which determines that the power battery with the advanced fault, at the moment, the voltage value and the temperature value of the power battery are too high, the temperature rise rate is too high, the power battery cannot work, the power battery has the advanced fault, and the fault grade is determined to be the third fault grade, so that the second judgment result is obtained.
When the power battery is of the ternary lithium type, if the voltage value is greater than 5.07v and less than or equal to 5.34v, the voltage change rate is greater than 0, or the temperature value is greater than 90 ℃, and meanwhile the temperature rise rate is greater than 1 ℃/min, it is indicated that the voltage value and the temperature value of the power battery are too high, the temperature rise rate is too high, the power battery cannot work, an advanced fault exists in the power battery, the fault grade is determined to be a third fault grade, and a second judgment result is obtained.
When the type of the power battery is a lithium iron phosphate type power battery, if the voltage value is greater than 5.51v and less than or equal to 5.8v, the voltage change rate is greater than 0, or the temperature value is greater than 90 ℃, and meanwhile the temperature rise rate is greater than 1 ℃/min, the condition that the voltage value and the temperature value of the power battery are too high and the temperature rise rate is too high is indicated, the power battery cannot work, an advanced fault exists in the power battery, the fault grade is determined to be a third fault grade, and a second judgment result is obtained.
Fig. 3 is a flow chart of a fault early warning method of a power battery according to an embodiment of the present invention, as shown in fig. 3, which is a comprehensive description of a specific implementation process of the above steps. When the method in fig. 3 is operated, the dynamic data and the static data of the vehicle are first introduced, the battery type is judged to be of lithium iron phosphate type or ternary lithium type according to the static data, if the battery type cannot be judged, whether the voltage of the battery cell is more than 3.8v is further judged, if the voltage of the battery cell is more than 3.8v, the battery type is judged to be of ternary lithium type, and otherwise, the battery type is judged to be of lithium iron phosphate type. And judging whether the state of charge of the battery exceeds 100, if not, judging that the state of charge is normal, if so, judging that the state of charge is abnormal, and extracting the highest cell voltage U and the highest probe temperature T of the battery.
When the type of the power battery is a ternary lithium type power battery, if U is less than or equal to 4.2V, the voltage change rate is more than 0, T is less than or equal to 55 ℃, the battery charging process is determined to be safe, and when the type of the power battery is a lithium iron phosphate type power battery, if U is less than or equal to 3.65V, the voltage change rate is more than 0, T is less than or equal to 55 ℃, and the battery charging process is determined to be safe.
If the condition is not met, the next step of judgment is carried out, when the type of the power battery is a ternary lithium type power battery, if the voltage change rate is more than 0 and less than or equal to 4.7V, or the temperature is more than 55 ℃ and less than or equal to 80 ℃, the battery fault level is determined to be 1, an alarm is triggered, and when the type of the power battery is a lithium iron phosphate type power battery, if the voltage change rate is more than 0 and less than or equal to 3.65V and less than or equal to 5V, or the temperature is more than 55 ℃ and less than or equal to 80 ℃, the battery fault level is determined to be 1, and the alarm is triggered.
If the condition is not met, the next step of judgment is carried out, when the type of the power battery is a ternary lithium type power battery, if the voltage change rate is more than 4.7V and less than or equal to 5.07V, or the temperature rise rate is more than 80 ℃ and less than or equal to 90 ℃, the battery fault level is determined to be 2, an alarm is triggered and a circuit is cut off, when the type of the power battery is a lithium iron phosphate type power battery, if the voltage change rate is more than or equal to 5.51V, or the temperature rise rate is more than 80 ℃ and less than or equal to 90 ℃, the battery fault level is determined to be 2, the alarm is triggered and the circuit is cut off.
If the condition is not met, the next step of judgment is carried out, when the type of the power battery is a ternary lithium type power battery, if the voltage change rate is more than 0 or less than 5.34V, or T is more than 90 ℃, the voltage is rapidly reduced, the temperature rise rate is more than 1 ℃/min, the battery fault level is determined to be 3, an alarm is triggered, a circuit is cut off, a cooling system is triggered, when the type of the power battery is a lithium iron phosphate type power battery, if the voltage change rate is more than 0 or less than 5.8V, or T is more than 90 ℃, the voltage is rapidly reduced, the temperature rise rate is more than 1 ℃/min, the battery fault level is determined to be 3, the alarm is triggered, the circuit is cut off, and the cooling system is triggered.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The embodiment also provides a fault early warning device for a power battery, which is used for implementing the above embodiment and the preferred implementation manner, and the description is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 4 is a block diagram of a power battery fault early-warning device according to an embodiment of the present invention, and as shown in fig. 4, an example of the power battery fault early-warning device 400 includes: the acquisition module 401 is configured to acquire a charging state, a voltage value and a temperature value of the power battery by the acquisition module 401; the first judging module 402 is configured to judge the charging state, so as to obtain a first judging result, where the first judging result is used to indicate whether the charging state is normal; the second judging module 403 is configured to judge the voltage value and the temperature value in response to whether the first judging result indicates that the charging state is abnormal, so as to obtain a second judging result, where the second judging result is used to determine a fault level of the power battery; the determining module 404, the determining module 404 is configured to determine an early warning policy based on the second determination result.
Optionally, the second judging module 403 is further configured to obtain a voltage change rate of the power battery, a first voltage threshold value, and a first temperature threshold value; and responding to the voltage value being smaller than or equal to the first voltage threshold value, wherein the voltage change rate is larger than a preset threshold value, the temperature value is smaller than or equal to the first temperature threshold value, determining the fault grade as the first fault grade, and obtaining a second judging result.
Optionally, the second determining module 403 is further configured to obtain a second voltage threshold and a second temperature threshold of the power battery; and determining that the fault level is a second fault level in response to the voltage value being greater than the first voltage threshold and less than or equal to the second voltage threshold and the voltage change rate being greater than a preset threshold, or the temperature value being greater than the first temperature threshold and less than or equal to the second temperature threshold, and obtaining a second judgment result.
Optionally, the second judging module 403 is further configured to obtain a temperature rise rate of the power battery, a third voltage threshold value, and a third temperature threshold value; and determining that the fault grade is a third fault grade according to the fact that the voltage value is larger than the second voltage threshold and smaller than or equal to the third voltage threshold and the voltage change rate is larger than a preset threshold or the temperature value is larger than the second temperature threshold and smaller than or equal to the third temperature threshold and the temperature rise rate is larger than the first rate threshold, and obtaining a second judging result.
Optionally, the second determining module 403 is further configured to obtain a fourth voltage threshold and a fourth temperature threshold of the power battery; responding to the voltage value being larger than the third voltage threshold value and smaller than or equal to the fourth voltage threshold value and the voltage change rate being larger than the preset threshold value, or determining the fault level as a fourth fault level when the temperature value is larger than the third temperature threshold value and the temperature rise rate is larger than the second rate threshold value, and obtaining a second judging result; the fourth voltage threshold is larger than the third voltage threshold and larger than the second voltage threshold and larger than the first voltage threshold, the third temperature threshold is larger than the second temperature threshold and larger than the first temperature threshold, the second speed threshold is larger than the first speed threshold, and the fourth fault level is higher than the third fault level and higher than the second fault level.
Optionally, the obtaining module 401 is further configured to obtain static data of the power battery; judging the battery type of the power battery according to the static data; a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power battery are determined based on the battery type.
Optionally, the obtaining module 401 is further configured to obtain a cell voltage of the power battery in response to the inability to determine the battery type of the power battery according to the static data; the battery type of the power battery is determined according to the cell voltage.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
Embodiments of the present application also provide a vehicle for performing the steps of any of the method embodiments described above.
Alternatively, in the present embodiment, the above-described vehicle may be configured to store a computer program for executing the steps of:
step S1, acquiring a charging state, a voltage value and a temperature value of a power battery;
step S2, judging the charging state to obtain a first judgment result;
step S3, judging the voltage value and the temperature value in response to the first judgment result indicating that the charging state is abnormal, and obtaining a second judgment result;
and S4, determining an early warning strategy based on the second judging result.
Embodiments of the present application also provide a computer readable storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run on a computer or processor.
Alternatively, in the present embodiment, the above-described computer-readable storage medium may be configured to store a computer program for performing the steps of:
step S1, acquiring a charging state, a voltage value and a temperature value of a power battery;
step S2, judging the charging state to obtain a first judgment result;
step S3, judging the voltage value and the temperature value in response to the first judgment result indicating that the charging state is abnormal, and obtaining a second judgment result;
and S4, determining an early warning strategy based on the second judging result.
Alternatively, in the present embodiment, the above-described computer-readable storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media in which a computer program can be stored.
An embodiment of the invention also provides an electronic device comprising a memory in which a computer program is stored and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Alternatively, in the present embodiment, the processor in the electronic device may be configured to execute the computer program to perform the steps of:
Step S1, acquiring a charging state, a voltage value and a temperature value of a power battery;
step S2, judging the charging state to obtain a first judgment result;
step S3, judging the voltage value and the temperature value in response to the first judgment result indicating that the charging state is abnormal, and obtaining a second judgment result;
and S4, determining an early warning strategy based on the second judging result.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The fault early warning method for the power battery is characterized by comprising the following steps of:
acquiring a charging state, a voltage value and a temperature value of a power battery;
judging the charging state to obtain a first judging result, wherein the first judging result is used for indicating whether the charging state is normal or not;
responding to the first judgment result to represent the abnormal state of charge, judging the voltage value and the temperature value to obtain a second judgment result, wherein the second judgment result is used for determining the fault level of the power battery;
and determining an early warning strategy based on the second judging result.
2. The method of claim 1, wherein determining the voltage value and the temperature value to obtain a second determination result comprises:
acquiring a voltage change rate, a first voltage threshold and a first temperature threshold of the power battery;
And in response to the voltage value being smaller than or equal to the first voltage threshold, the voltage change rate is larger than a preset threshold, the temperature value is smaller than or equal to the first temperature threshold, the fault grade is determined to be a first fault grade, and the second judgment result is obtained.
3. The method as recited in claim 2, further comprising:
acquiring a second voltage threshold and a second temperature threshold of the power battery;
and determining that the fault grade is a second fault grade according to the fact that the voltage value is larger than the first voltage threshold and smaller than or equal to the second voltage threshold and the voltage change rate is larger than a preset threshold or the temperature value is larger than the first temperature threshold and smaller than or equal to the second temperature threshold, and obtaining the second judging result.
4. A method according to claim 3, further comprising:
acquiring the temperature rise rate, a third voltage threshold and a third temperature threshold of the power battery;
and determining that the fault grade is a third fault grade according to the fact that the voltage value is larger than the second voltage threshold and smaller than or equal to the third voltage threshold and the voltage change rate is larger than a preset threshold or the temperature value is larger than the second temperature threshold and smaller than or equal to the third temperature threshold and the temperature rise rate is larger than the first rate threshold, and obtaining the second judging result.
5. The method as recited in claim 4, further comprising:
acquiring a fourth voltage threshold and a fourth temperature threshold of the power battery;
determining that the fault level is a fourth fault level in response to the voltage value being greater than the third voltage threshold and less than or equal to the fourth voltage threshold and the voltage change rate being greater than a preset threshold, or the temperature value being greater than the third temperature threshold and the temperature rise rate being greater than a second rate threshold, and obtaining the second judgment result;
the fourth voltage threshold is larger than the third voltage threshold and larger than the second voltage threshold and larger than the first voltage threshold, the third temperature threshold is larger than the second temperature threshold and larger than the first temperature threshold, the second speed threshold is larger than the first speed threshold, and the fourth fault level is higher than the third fault level and higher than the second fault level.
6. The method of claims 1-5, further comprising:
acquiring static data of the power battery;
judging the battery type of the power battery according to the static data;
and determining a plurality of voltage thresholds and a plurality of temperature thresholds corresponding to the power battery based on the battery type.
7. The method as recited in claim 6, further comprising:
responding to the fact that the battery type of the power battery cannot be judged according to the static data, and obtaining the single voltage of the power battery;
and determining the battery type of the power battery according to the single voltage.
8. A power cell failure warning device, comprising:
the acquisition module is used for acquiring the charging state, the voltage value and the temperature value of the power battery;
the first judging module is used for judging the charging state to obtain a first judging result, wherein the first judging result is used for indicating whether the charging state is normal or not;
the second judging module is used for judging the voltage value and the temperature value to obtain a second judging result in response to the fact that whether the first judging result indicates that the charging state is abnormal or not, wherein the second judging result is used for determining the fault level of the power battery;
and the determining module is used for determining an early warning strategy based on the second judging result.
9. A vehicle for performing the malfunction alerting method of the power battery as set forth in any one of claims 1 to 8.
10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of fault warning of a power cell as claimed in any one of the preceding claims 1 to 7.
CN202311145970.6A 2023-09-06 2023-09-06 Power battery fault early warning method and device, storage medium and electronic device Pending CN117104002A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118568645A (en) * 2024-07-31 2024-08-30 小米汽车科技有限公司 Charging seat abnormality warning method, device, equipment and medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118568645A (en) * 2024-07-31 2024-08-30 小米汽车科技有限公司 Charging seat abnormality warning method, device, equipment and medium

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