CN115476729A - Control method and system for improving battery safety, electronic device and storage medium - Google Patents

Control method and system for improving battery safety, electronic device and storage medium Download PDF

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Publication number
CN115476729A
CN115476729A CN202211077063.8A CN202211077063A CN115476729A CN 115476729 A CN115476729 A CN 115476729A CN 202211077063 A CN202211077063 A CN 202211077063A CN 115476729 A CN115476729 A CN 115476729A
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battery
cell
data
control method
soc
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朱金鑫
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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Priority to CN202211077063.8A priority Critical patent/CN115476729A/en
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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
    • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
    • 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
    • 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
    • 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]
    • B60L58/13—Maintaining the SoC within a determined range
    • 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
    • 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
    • B60L2240/549—Current
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to a control method, a system, an electronic device and a storage medium for improving the safety of a battery, wherein the control method comprises the following steps: establishing a basic database storing corresponding relations between the cell data and the working conditions, wherein the cell data comprises: dynamic voltage data; the working conditions comprise: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell; the method comprises the steps of periodically collecting cell data and working condition of a cell in the running process of a vehicle, comparing the cell data of the cell with the cell data when the working condition in a basic database is most matched, and sending a prompt when a comparison result exceeds a set range; the dynamic voltage is creatively utilized as a control scheme of the safety early warning, so that the reliability of the safety early warning of the battery cell can be improved to a great extent; potential problems can be identified in advance, timely early warning is carried out, the occurrence probability and the damage degree of safety accidents can be effectively reduced, and the driving and passenger personal safety and the vehicle property safety are effectively protected.

Description

Control method and system for improving battery safety, electronic device and storage medium
Technical Field
The present invention relates to the field of battery safety technologies, and in particular, to a control method and system for improving battery safety, an electronic device, and a storage medium.
Background
While the new energy automobile industry is developing at a high speed, the safety of the power storage battery for the automobile is concerned. In order to ensure the basic safety requirements of the storage battery monomer, the battery pack or the system, standard test guidance is given under the environments such as vibration, mechanical impact, collision, extrusion, damp-heat circulation, water immersion, thermal stability, temperature impact, salt fog, high altitude, over-temperature, over-current, over-charge, over-discharge, external short circuit and the like. In the actual operation process, an effective method is lacked to monitor the safety of the battery in real time, and certain potential safety hazards exist.
In the prior art, the method for controlling the safety of the battery is mainly to arrange a heat insulating material, such as an aerogel material layer, between the electric cores; a mica plate is arranged above the electric core; the battery pack box body is provided with an explosion-proof valve and other measures to prevent the heat spreading caused by the thermal runaway of a single electric core. However, in extreme cases of thermal runaway occurring in multiple battery cells simultaneously, such as vehicle rollover, severe collision, battery management system failure and the like, the current thermal suppression technology cannot ensure that no fire or explosion occurs in a whole package.
Disclosure of Invention
The invention provides a control method, a control system, electronic equipment and a storage medium for improving the safety of a battery aiming at the technical problems in the prior art, and solves the problem of hidden danger in the safety detection of the battery in the prior art.
According to a first aspect of the present invention, there is provided a control method for improving battery safety, comprising:
step 1, establishing a basic database storing a corresponding relation between cell data and working conditions, wherein the cell data comprises: dynamic voltage data; the working condition comprises the following steps: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell;
and 2, periodically acquiring the cell data and the working condition of the cell in the running process of the vehicle, comparing the cell data of the cell with the cell data when the working condition in the basic database is most matched, and sending a prompt when the comparison result exceeds a set range.
On the basis of the technical scheme, the invention can be improved as follows.
Optionally, the process of establishing the basic database storing the corresponding relationship between the battery cell data and the operating condition in step 1 includes:
step 101, performing life decay test on the extracted multiple sets of battery systems;
step 102, recording the cell data of each cell under various working conditions until each set of battery system reaches the end-of-life stage;
and 103, disassembling and analyzing each battery core of each battery system, and storing the corresponding relation between the battery core data and the working condition when each battery core in the battery system is not abnormal as a reference into the basic database.
Optionally, after the step 1 of establishing the basic database, the method further includes: and sending the data stored in the basic database of the cloud end to the vehicle end through a wireless network.
Optionally, the cell data further includes: temperature data of each of the cells.
Optionally, the operating conditions further include: the current data of the current sampling points of each battery cell and the working state of the battery comprise discharging and charging.
Optionally, the sending a prompt when the difference of the comparison results exceeds the set range in step 2 includes:
step 201, calculating a comparison result as an H factor: h-index = U/U0 or H-index = T/T0; wherein U0 and T0 are dynamic voltage data and temperature data of the battery cell when the working condition in the reference database is most matched, respectively;
and step 202, sending out corresponding reminding according to the range of the value of the H-index and a setting strategy.
Optionally, in step 202:
when H is more than 1.05, informing the user to perform further investigation and problem confirmation after the contact sale within the set time;
and when H is more than 1.1, informing the user to immediately contact the after-sales service for further investigation and problem confirmation, and stopping using the vehicle.
According to a second aspect of the present invention, there is provided a control system for improving battery safety, comprising: the system comprises a basic database and a battery safety reminding module;
the basic database is used for storing the corresponding relation between the cell data and the working condition; the cell data includes: dynamic voltage data; the working condition comprises the following steps: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell;
the battery safety reminding module is used for regularly acquiring the battery core data and the working condition of the battery core in the running process of the vehicle, comparing the battery core data of the battery core with the battery core data when the working condition is most matched in the basic database, and sending a reminding when the comparison result exceeds a set range.
According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor for implementing the steps of the control method for improving battery safety when executing a computer management like program stored in the memory.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer management-like program, which when executed by a processor, implements the steps of a control method for improving battery safety.
According to the control method, the control system, the electronic equipment and the storage medium for improving the safety of the battery, the dynamic voltage is creatively utilized as a control scheme of safety early warning, so that the reliability of the safety early warning of the battery cell can be improved to a great extent; potential problems can be identified in advance, timely early warning is carried out, the occurrence probability and the damage degree of safety accidents can be effectively reduced, and the personal safety of drivers and passengers and the safety of vehicles and property are effectively protected.
Drawings
FIG. 1 is a flow chart of a control for improving battery safety provided by the present invention;
FIG. 2 is a schematic diagram of a hardware structure of a possible electronic device provided in the present invention;
fig. 3 is a schematic diagram of a hardware structure of a possible computer-readable storage medium provided in the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a flowchart of a control method for improving battery safety according to the present invention, as shown in fig. 1, the control method includes:
step 1, establishing a basic database storing the corresponding relation between the cell data and the working condition, wherein the cell data comprises: dynamic voltage data; the working conditions comprise: the battery system comprises a service life stage of the battery system, a position of the battery cell in the battery system and an SOC of the battery cell.
And 2, periodically acquiring the battery cell data and the working condition of the battery cell in the running process of the vehicle, comparing the battery cell data of the battery cell with the battery cell data when the working condition in the basic database is most matched, and sending a prompt when the comparison result exceeds a set range.
The invention provides a control method, a control system, electronic equipment and a storage medium for improving the safety of a battery, and creatively utilizes dynamic voltage as a control scheme of safety early warning, so that the reliability of the safety early warning of a battery cell can be improved to a great extent; potential problems can be identified in advance, timely early warning is carried out, the occurrence probability and the damage degree of safety accidents can be effectively reduced, and the personal safety of drivers and passengers and the safety of vehicles and property are effectively protected.
Example 1
Embodiment 1 of the present invention is an embodiment of a control method for improving battery safety, where the battery may be a lithium electronic battery, and as can be seen from fig. 1, the embodiment of the control method includes:
step 1, establishing a basic database storing the corresponding relation between the cell data and the working condition, wherein the cell data comprises: dynamic voltage data; the working condition comprises the following steps: the battery system comprises a service life stage of the battery system, a position of the battery cell in the battery system and an SOC of the battery cell.
In a possible embodiment, the process of establishing the basic database storing the corresponding relationship between the electrical core data and the operating conditions in step 1 includes:
and step 101, performing life decay test on the extracted multiple sets of battery systems.
And step 102, recording the cell data of each cell under various working conditions until each set of battery system reaches the end-of-life stage.
And 103, disassembling and analyzing each battery core of each battery system, and storing the corresponding relation between the battery core data and the working condition when each battery core in the battery system is not abnormal as a reference into a basic database.
In a possible embodiment, after the step 1 of building the basic database, the method further includes: and sending the data stored in the basic database of the cloud end to the vehicle end through a wireless network.
In a possible embodiment, the cell data further includes: temperature data for each cell.
In one embodiment, the dynamic voltage signal function is represented by U and the temperature signal function is represented by T
Voltage signal function U = f (x, y, z); temperature signal function T = f' (x, y, z).
x is the State of Health (SOH) of the battery system; y is the State of Charge (SOC) of the battery system; z is the current value in a certain period of time.
In a possible embodiment, the operating conditions further include: the current data of the current sampling point of each electric core and the working state of the battery, wherein the working state of the battery comprises discharging and charging.
And 2, regularly acquiring the cell data and the working condition of the cell in the running process of the vehicle, comparing the cell data of the cell with the cell data when the working condition in the basic database is best matched, and sending a prompt when the comparison result exceeds a set range.
In a possible embodiment, the sending a prompt when the difference of the comparison results exceeds the set range in step 2 includes:
step 201, calculating a comparison result as an H factor: h-index = U/U0 or H-index = T/T0; and U0 and T0 are respectively dynamic voltage data and temperature data of the battery cell when the working conditions in the reference database are most matched.
And step 202, sending out corresponding reminding according to the range of the value of the H-index and a setting strategy.
In one possible embodiment, in step 202:
and when H is more than 1.05, informing the user to perform further troubleshooting and problem confirmation after the contact and sale within the set time.
And when H is more than 1.1, informing the user to immediately contact the after-sale for further troubleshooting and problem confirmation, and stopping using the vehicle.
In specific implementation, under a certain working condition, a cell voltage signal in a reference database is recorded as U0, and a temperature signal is recorded as T0; and recording the cell voltage signal on the vehicle as U and recording the temperature signal as T under the corresponding working condition.
The comparison of the two was recorded as factor H (H-index)
H-index = U/U0 or H-index = T/T0.
The invention provides a calculation strategy, which is used for monitoring the dynamic voltage change condition of a lithium ion battery in real time so as to analyze the cells which are possibly abnormal. The method can be described as arranging a plurality of battery cells in a battery system, wherein each battery cell is provided with a voltage sampling point and a current sampling point. The battery system discharges or charges under a certain working condition, and the voltage of each battery cell dynamically changes along with the current. If the consistency of each cell in the battery system is very good, the dynamic voltage of each cell is correspondingly consistent in steps, and no difference occurs. If a certain battery cell or a plurality of battery cells in the battery system are attenuated more obviously, the dynamic voltage of the battery cell or the plurality of battery cells can be subjected to a cluster phenomenon. The abnormal dynamic voltage existing in the long-term use process may be one of the bases for judging the thermal runaway of a certain battery cell, and the block is basically in a blank zone of management and control because the dynamic voltage of the lithium ion battery is not accurately managed in the current battery management strategy.
The embodiment of the dynamic voltage analysis strategy proposed by the present invention is as follows: in the development stage of the battery system, life attenuation tests are simultaneously carried out on the three sets of battery systems (the life attenuation comprises storage life attenuation and charge-discharge cycle life attenuation), dynamic voltage change conditions of each battery cell in different SOC and different current charging or discharging processes corresponding to different life stages are collected, when the battery system for test enters the end-of-life stage, unpacking and battery cell disassembling analysis are carried out on each set of battery system, whether each battery cell in the three sets of battery systems is abnormal or not is confirmed, and if the battery cells are not abnormal, the data and the battery cell position coding information are stored in a storage module as a reference. In the running process of a vehicle, the dynamic voltage change condition of each battery cell at different SOC is regularly compared with an input reference value, for example, when the deviation from the reference value exceeds 3%, namely H-index is greater than 1.03, a user needs to be informed to perform further investigation and problem confirmation after contact and sale within one month; for another example, if the deviation from the reference value exceeds 5%, that is, if H-index > 1.05, the user needs to be informed to perform further troubleshooting and problem confirmation after the contact sale within a week; for another example, if the deviation from the reference value exceeds 10%, that is, if H-index > 1.1, the user needs to be notified to immediately contact the after-market for further troubleshooting and problem confirmation, and stop using the vehicle.
The invention is basically divided into three major parts: 1) Building a reference database, inputting the reference database into a cloud big data tie platform, wherein the platform has calculation and analysis capabilities; 2) Analyzing and sorting the cell voltage data of the vehicle in the driving process, and comparing the cell voltage data with a reference database; 3) And sending early warning information to the user or after sale according to the comparison result.
In the development process of the battery system, a large number of tests for simulating the running condition of the whole vehicle are carried out on the battery systems in different health states, and voltage data, temperature data and the like of battery cells at different positions in the battery system are collected; establishing a reference database by using the data, and communicating and interacting the cloud end and the vehicle end through a 5G network; in the actual vehicle running process, identifying working condition conditions basically close to the reference database, and then comparing the voltage information and the temperature information of each battery cell, so as to grasp the state of each battery cell in real time; and marking the electric cores with abnormal comparison results, paying attention to follow up, and informing a user and carrying out timely and effective treatment after sale.
Example 2
Embodiment 2 provided by the present invention is an embodiment of a control system for improving battery safety, the embodiment of the control system including: the device comprises a basic database and a battery safety reminding module.
The basic database is used for storing the corresponding relation between the battery cell data and the working condition; the cell data include: dynamic voltage data; the working condition comprises the following steps: the battery system comprises a life stage of the battery system, a position of a cell in the battery system, and a SOC of the cell.
In a possible embodiment, the process of establishing the basic database storing the correspondence between the battery cell data and the operating condition in the basic database includes:
and step 101, performing life decay test on the extracted multiple sets of battery systems.
And step 102, recording the cell data of each cell under various working conditions until each set of battery system reaches the end-of-life stage.
And 103, disassembling and analyzing each battery cell of each battery system, and storing the corresponding relation between the battery cell data and the working condition when each battery cell in the battery system is not abnormal as a reference into a basic database.
In a possible embodiment, after the building of the basic database, the method further includes: and sending the data stored in the basic database of the cloud end to the vehicle end through a wireless network.
In a possible embodiment, the cell data further includes: temperature data for each cell.
In one embodiment, the dynamic voltage signal function is represented by U and the temperature signal function is represented by T
Voltage signal function U = f (x, y, z); temperature signal function T = f' (x, y, z).
x is the State of Health (SOH) of the battery system; y is the State of Charge (SOC) of the battery system; z is the current value in a certain period of time.
In one possible embodiment, the operating conditions further include: the current data of the current sampling point of each electric core and the working state of the battery, wherein the working state of the battery comprises discharging and charging.
The battery safety reminding module is used for regularly acquiring the battery cell data and the working condition of the battery cell in the running process of the vehicle, comparing the battery cell data of the battery cell with the battery cell data when the working condition is most matched in the basic database, and sending a reminding when the comparison result exceeds a set range.
In a possible embodiment, the sending out the prompt by the battery safety prompt module when the difference value of the comparison result exceeds the set range includes:
step 201, calculating a comparison result as an H factor: h-index = U/U0 or H-index = T/T0; and U0 and T0 are respectively dynamic voltage data and temperature data of the battery cell when the working conditions in the reference database are most matched.
And step 202, sending out corresponding reminding according to the range of the value of the H-index and a setting strategy.
In one possible embodiment, in step 202:
and when H is more than 1.05, informing the user to perform further troubleshooting and problem confirmation after the contact and sale within the set time.
And when H is more than 1.1, informing the user to immediately contact the after-sales service for further investigation and problem confirmation, and stopping using the vehicle.
Referring to fig. 2, fig. 2 is a schematic diagram of an embodiment of an electronic device according to an embodiment of the invention. As shown in fig. 2, an embodiment of the present invention provides an electronic device, which includes a memory 1310, a processor 1320, and a computer program 1311 stored in the memory 1310 and operable on the processor 1320, where the processor 1320, when executing the computer program 1311, implements the following steps: establishing a basic database storing the corresponding relation between the battery cell data and the working condition, wherein the battery cell data comprises: dynamic voltage data; the working condition comprises the following steps: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell; the battery cell data and the working condition of the battery cell in the running process of the vehicle are regularly acquired, the battery cell data of the battery cell is compared with the battery cell data when the working condition in the basic database is most matched, and a prompt is sent when the comparison result exceeds a set range.
Referring to fig. 3, fig. 3 is a schematic diagram of an embodiment of a computer-readable storage medium according to the present invention. As shown in fig. 3, the present embodiment provides a computer-readable storage medium 1400, on which a computer program 1411 is stored, the computer program 1411 when executed by a processor implements the steps of: establishing a basic database storing the corresponding relation between the battery cell data and the working condition, wherein the battery cell data comprises: dynamic voltage data; the working conditions comprise: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell; regularly gather the electric core data and the operating mode condition of vehicle operation in-process electricity core, compare the electric core data of electricity core and the electric core data when the operating mode condition is the best match in the basic database, send when the contrast result exceedes the settlement scope and remind.
Specific test protocol examples are also provided by the present invention through examples 3, 4 and 5.
Example 3
Embodiment 3 provided by the present invention is a first specific test scenario embodiment of a control method, a system, an electronic device, and a storage medium for improving battery safety, where the first specific test scenario embodiment includes:
and in the development stage of the battery system, the life attenuation test is simultaneously carried out on the three sets of battery systems.
The life attenuation mode is adopted as follows: normal temperature storage for 30 days, normal temperature charging and discharging for 100 circles, normal temperature storage for 30 days at 45 ℃, and 35 ℃ charging and discharging for 100 circles.
The collection of the battery system life is respectively in 100%SoH (State of Health, soC), 98%SoH, 95%SoH, 92%.
The different SoCs are respectively 100-SoC, 95-SoC, 90-SoC, 85-SoC, 80-SoC, 75-SoC, 70-SoC, 65-SoC, 60-SoC, 55-SoC, 50-SoC, 45-SoC, 40-SoC, 35-SoC, 30-SoC, 25-SoC, 20-SoC, 15-SoC, 10-SoC, 5-SoC, 0-SoC.
The multiplying factor of the charging process and the discharging process can adopt 0.33C, 0.5C, 1C, 2C, 3C and the like. For example, the battery system is charged from 20-percent soc to 80-percent soc at 1C rate, obtaining dynamic voltage variation data per cell, while the battery system is at 80-percent soh. When the battery system for testing enters the service life termination stage, unpacking and cell disassembly analysis are carried out on each set of battery system, whether each cell in the three sets of battery systems is abnormal or not is confirmed, and if the cells are not abnormal, the data and the cell position coding information are stored in the storage module as the reference. In the running process of the vehicle, the dynamic voltage change condition of each battery cell at different SOC is regularly compared with an input reference value, if the deviation of the dynamic voltage change condition exceeds 3 percent of the reference value, a user needs to be informed to perform further investigation and problem confirmation after contact and sale within one month; if the deviation situation exceeds 5%, the user needs to be informed to perform further troubleshooting and problem confirmation after the contact sale within one week; if the deviation exceeds 10%, the user needs to be informed to immediately contact the after-sales service for further troubleshooting and problem confirmation, and stop using the vehicle.
Example 4
Embodiment 4 provided in the present invention is a second specific test scheme embodiment of the control method, system, electronic device, and storage medium for improving battery safety provided in the present invention, where the second specific test scheme embodiment includes:
and in the development stage of the battery system, the life attenuation test is simultaneously carried out on the three sets of battery systems.
The life attenuation mode is adopted as follows: charging for 1 time every day from Monday to Friday, then performing WLTC working condition discharging, and storing for the rest of time; charging for 2 times every day from saturday to sunday, then discharging under the WLTC working condition, and storing the energy for the rest of time.
The collection of the battery system life is respectively in 100%SoH (State of Health, soC), 98%SoH, 95%SoH, 92%.
The different SoCs are each 100% SoC, 95% SoC, 90% SoC, 85% SoC, 80% SoC, 75% SoC, 70% SoC, 65% SoC, 60% SoC, 55% SoC, 50% SoC, 45% SoC, 40% SoC, 35% SoC, 30% SoC, 25% SoC, 20% SoC, 15% SoC, 10% SoC, 5% SoC, 0% SoC.
The multiplying power of the charging process can adopt 0.33C, 0.5C, 1C, 2C, 3C and the like.
For example, the battery system is charged from 20-percent soc to 80-percent soc at 1C rate, obtaining dynamic voltage variation data per cell, while the battery system is at 80-percent soh. The discharge was carried out on a duty basis according to the charging/discharging power of the WLTC, and 80% soc to 75% soc was recorded, the dynamic voltage change per cell. When the battery system for testing enters the service life termination stage, unpacking and cell disassembly analysis are carried out on each set of battery system, whether each cell in the three sets of battery systems is abnormal or not is confirmed, and if the cells are not abnormal, the data and the cell position coding information are stored in the storage module as the reference. In the running process of a vehicle, the dynamic voltage change condition of each battery cell at different SOC is regularly compared with an input reference value, if the deviation from the reference value exceeds 3%, a user needs to be informed to contact and sell within one month for further troubleshooting and problem confirmation; if the deviation situation exceeds 5%, the user needs to be informed to perform further troubleshooting and problem confirmation after the contact sale within one week; if the deviation exceeds 10%, the user needs to be informed to immediately contact the after-sales service for further troubleshooting and problem confirmation, and stop using the vehicle.
Example 5
Embodiment 5 provided by the present invention is a third specific test scheme embodiment of the control method, system, electronic device and storage medium for improving battery safety provided by the present invention, where the third specific test scheme embodiment includes:
and in the development stage of the battery system, the three sets of battery systems are subjected to life attenuation tests at the same time.
The life attenuation mode is adopted as follows: charging for 1 time every day from Monday to Friday, then discharging under the CLTC working condition, and storing the residual time; and charging for 2 times every day from saturday to sunday, then discharging under the CLTC working condition, and storing the residual time.
The collection of the battery system life is respectively in 100%SoH (State of Health, soC), 98%SoH, 95%SoH, 92%.
The different SoCs are respectively 100-SoC, 95-SoC, 90-SoC, 85-SoC, 80-SoC, 75-SoC, 70-SoC, 65-SoC, 60-SoC, 55-SoC, 50-SoC, 45-SoC, 40-SoC, 35-SoC, 30-SoC, 25-SoC, 20-SoC, 15-SoC, 10-SoC, 5-SoC, 0-SoC.
The multiplying power of the charging process can adopt 0.33C, 0.5C, 1C, 2C, 3C and the like.
For example, when the battery system is at 80-soh, the battery system is subjected to 1C-rate charging from 20-soc to 80-soc, obtaining dynamic voltage variation data for each cell. The duty discharge was performed according to the CLTC charge/discharge power, and 80% soc to 75% soc was recorded, the dynamic voltage change per cell. When the battery system for testing enters the service life termination stage, unpacking and cell disassembly analysis are carried out on each set of battery system, whether each cell in the three sets of battery systems is abnormal or not is confirmed, and if the cells are not abnormal, the data and the cell position coding information are stored in the storage module as the reference. In the running process of a vehicle, the dynamic voltage change condition of each battery cell at different SOC is regularly compared with an input reference value, if the deviation from the reference value exceeds 3%, a user needs to be informed to contact and sell within one month for further troubleshooting and problem confirmation; if the deviation situation exceeds 5%, the user needs to be informed to perform further troubleshooting and problem confirmation after the contact sale within one week; if the deviation exceeds 10%, the user needs to be informed to immediately contact the after-sales service for further troubleshooting and problem confirmation, and stop using the vehicle.
The control method, the control system, the electronic equipment and the storage medium for improving the safety of the battery provided by the embodiment of the invention creatively utilize the dynamic voltage as a control scheme of safety early warning; in the development stage of the battery system, life attenuation tests are simultaneously carried out on a plurality of sets of battery systems (the life attenuation comprises storage life attenuation and charge-discharge cycle life attenuation), dynamic voltage change conditions of each battery cell in different SOC and different current charging or discharging processes corresponding to different life stages are collected, when the battery system for test enters the end-of-life stage, unpacking and battery cell disassembly analysis are carried out on each set of battery system, whether each battery cell in the three sets of battery systems is abnormal or not is confirmed, and if the battery cells are not abnormal, the data and the battery cell position coding information are stored in a storage module as a reference. In the running process of a vehicle, the dynamic voltage change condition of each battery cell at different SOC is regularly compared with an input reference value, for example, when the deviation from the reference value exceeds 3%, namely H-index is greater than 1.03, a user needs to be informed to perform further investigation and problem confirmation after contacting and selling within one month; for another example, if the deviation from the reference value exceeds 5%, that is, if the H-index is greater than 1.05, the user needs to be informed to perform further troubleshooting and problem confirmation after the contact sale within a week; for another example, if the deviation from the reference value exceeds 10%, that is, the H-index is greater than 1.1, the user needs to be informed to immediately contact the vehicle for further troubleshooting and problem confirmation after sale, and stop using the vehicle; in the development process of the battery system, a large number of tests for simulating the running working condition of the whole vehicle are carried out on the battery systems in different health states, and voltage data, temperature data and the like of battery cores in different positions in the battery system are collected; establishing a reference database by using the data, and communicating and interacting the cloud end and the vehicle end through a 5G network; in the actual vehicle running process, identifying working condition conditions basically close to the reference database, and then comparing the voltage information and the temperature information of each battery cell, so as to grasp the state of each battery cell in real time; marking the electric core with abnormal comparison result, paying attention again to follow up, informing the user and carrying out timely and effective treatment after sale; the reliability of safety early warning of the lithium ion battery cell can be improved to a great extent; potential problems can be identified in advance, then timely early warning is carried out, the occurrence probability and the damage degree of safety accidents can be effectively reduced, and the personal safety of drivers and passengers and the safety of vehicle property are effectively protected.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A control method for improving battery safety, the control method comprising:
step 1, establishing a basic database storing a corresponding relation between cell data and working conditions, wherein the cell data comprises: dynamic voltage data; the working condition comprises the following steps: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell;
and 2, periodically acquiring the cell data and the working condition of a cell in the running process of the vehicle, comparing the cell data of the cell with the cell data when the working condition in the basic database is most matched, and sending a prompt when the comparison result of any cell exceeds a set range.
2. The control method according to claim 1, wherein the step 1 of establishing the basic database storing the correspondence between the cell data and the operating condition includes:
101, carrying out life attenuation test on the extracted multiple sets of battery systems;
step 102, recording the cell data of each cell under various working conditions until each set of battery system reaches the end-of-life stage;
and 103, disassembling and analyzing each battery core of each battery system, and storing the corresponding relation between the battery core data and the working condition when each battery core in the battery system is not abnormal as a reference into the basic database.
3. The control method according to claim 1, wherein the step 1 of building the basic database further comprises: and sending the data stored in the basic database of the cloud end to the vehicle end through a wireless network.
4. The control method of claim 1, wherein the cell data further comprises: temperature data of each of the cells.
5. The control method of claim 1, wherein the operating condition further comprises: the current data of the current sampling points of each battery cell and the working state of the battery comprise discharging and charging.
6. The control method according to claim 4, wherein the step 2 of issuing a warning when the difference value of the comparison results exceeds a set range includes:
step 201, calculating a comparison result as an H factor: h-index = U/U0 or H-index = T/T0; wherein U0 and T0 are dynamic voltage data and temperature data of the battery cell when the working condition in the reference database is most matched, respectively;
and step 202, sending out corresponding reminding according to the range of the value of the H-index and a setting strategy.
7. The control method according to claim 6, wherein in the step 202:
when H is more than 1.05, informing a user to perform further troubleshooting and problem confirmation after the contact and sale within the set time;
and when H is more than 1.1, informing the user to immediately contact the after-sales service for further investigation and problem confirmation, and stopping using the vehicle.
8. A control system for improving battery safety, comprising: the system comprises a basic database and a battery safety reminding module;
the basic database is used for storing the corresponding relation between the battery cell data and the working condition; the cell data includes: dynamic voltage data; the working condition comprises the following steps: the service life stage of the battery system, the position of the battery cell in the battery system and the SOC of the battery cell;
the battery safety reminding module is used for regularly acquiring the battery core data and the working condition of the battery core in the running process of the vehicle, comparing the battery core data of the battery core with the battery core data when the working condition is most matched in the basic database, and sending a reminding when the comparison result exceeds a set range.
9. An electronic device, comprising a memory, and a processor, wherein the processor is configured to implement the steps of the control method for improving battery safety according to any one of claims 1 to 7 when executing a computer management-like program stored in the memory.
10. A computer-readable storage medium, having stored thereon a computer management-like program which, when executed by a processor, implements the steps of the control method for improving battery safety according to any one of claims 1 to 7.
CN202211077063.8A 2022-08-31 2022-08-31 Control method and system for improving battery safety, electronic device and storage medium Pending CN115476729A (en)

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