CN111982334B - Temperature correction method and device, computer storage medium and processor - Google Patents
Temperature correction method and device, computer storage medium and processor Download PDFInfo
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- CN111982334B CN111982334B CN202010899462.7A CN202010899462A CN111982334B CN 111982334 B CN111982334 B CN 111982334B CN 202010899462 A CN202010899462 A CN 202010899462A CN 111982334 B CN111982334 B CN 111982334B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a temperature correction method and device, a computer storage medium and a processor. Wherein, the method comprises the following steps: determining the temperature distribution condition of the temperature acquisition object under different working condition parameters through thermal simulation; receiving temperature data acquired by a temperature sensor, and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object; determining the fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold value; and correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition. The invention solves the technical problem of potential safety hazard caused by the fact that temperature data cannot be effectively corrected under the condition of temperature sensor failure by directly acquiring the temperature through the temperature sensor in the related technology.
Description
Technical Field
The invention relates to the field of temperature monitoring, in particular to a temperature correction method and device, a computer storage medium and a processor.
Background
With the continuous development of the automobile industry and the change of the global environment, the electric automobile has become a large direction of vehicle development in the future. For electric vehicles, the suitable working temperature range of the lithium ion power battery is 10-30 ℃, and the practical most regions change all the year round, or in the south or the north, the lithium ion power battery has extremely cold or hot requirements, and the environment temperature cannot be kept in the suitable temperature range of the lithium ion power battery all the time due to the suitable temperature of the power battery.
In order to fully exert the electrical property of the power battery and prolong the service life of the power battery, and in recent years, the spontaneous combustion phenomenon of the electric automobile is more and more frequent, people pay more attention to the thermal management of a battery system. The main function of the thermal management is to heat the power battery when the temperature of the power battery is lower than a set temperature; and when the temperature of the power battery is higher than the set temperature, the temperature of the power battery is reduced. The actual working temperature of the power battery needs to be acquired by a temperature sensor arranged on the surface of the power battery, and various actions of thermal management are also carried out according to the temperature monitored by the temperature sensor. This makes it important for the temperature sensor to acquire the temperature, but once the temperature sensor fails, what is the temperature value acquired is handled.
According to the traditional design method, when the temperature sensor (NTC) is failed to collect, the controller is directly reported to be powered off, so that the whole system lacks certain robustness, the experience of a client is not good, and danger can be caused under extreme conditions.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a temperature correction method and device, a computer storage medium and a processor, which are used for at least solving the technical problem that in the related technology, temperature data cannot be effectively corrected to cause potential safety hazards under the condition that a temperature sensor fails in a manner of directly collecting temperature through the temperature sensor.
According to an aspect of an embodiment of the present invention, there is provided a temperature correction method including: determining the temperature distribution condition of the temperature acquisition object under different working condition parameters through thermal simulation; receiving temperature data acquired by a temperature sensor, and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object; determining that the temperature sensor fails when the voltage value meets a preset voltage threshold; and correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition.
Optionally, according to the number and the position of the temperature sensors with faults and the temperature distribution condition, correcting the temperature data of the temperature acquisition object includes: determining whether to correct the temperature data of the temperature acquisition object according to the number of the failed temperature sensors; and under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined and a preset first ratio threshold is met, correcting the temperature data of the temperature acquisition object according to the position of the temperature sensors with faults and the temperature distribution condition.
Optionally, the correcting the temperature data of the temperature acquisition object according to the position of the faulty temperature sensor and the temperature distribution condition includes: according to the temperature distribution condition, determining the temperature ratios of different positions of the temperature acquisition object under the condition that the working condition parameters corresponding to the current temperature data to be corrected are consistent; determining the correction temperature of the position of the temperature sensor with the fault according to the temperature ratio and the temperature data acquired by the temperature sensor with normal operation; and taking the corrected temperature as the temperature data acquired by the failed temperature sensor so as to correct the temperature data of the temperature acquisition object.
Optionally, determining the corrected temperature of the position where the faulty temperature sensor is located according to the temperature ratio and the temperature data collected by the temperature sensor operating normally includes: determining the ratio of the failed temperature sensor to a plurality of normally operating temperature sensors respectively; taking the product of the ratio and the temperature collected by the normally-operated temperature sensor corresponding to the ratio as a correction value of the normally-operated temperature sensor corresponding to the ratio to the failed temperature sensor; and averaging according to the corrected values of the plurality of normally-operated temperature sensors to the failed temperature sensor to determine the corrected temperature.
Optionally, the method further includes: under the condition that the ratio of the number of the failed temperature sensors to the total number of the temperature sensors is determined and the preset first ratio threshold value is not met, ending the current temperature acquisition; and overhauling the temperature sensors until the ratio of the number of the failed temperature sensors to the total number of the temperature sensors is determined, and the preset first ratio threshold is met.
Optionally, after the temperature data of the temperature acquisition object is corrected according to the position of the temperature sensor with the fault and the temperature distribution condition under the condition that the ratio of the number of the temperature sensors with the fault to the total number of the temperature sensors is determined and a preset first ratio threshold is met, the method further includes: determining whether the ratio meets a second ratio threshold value under the condition that the ratio meets a preset first ratio threshold value; and limiting the power of the temperature acquisition object under the condition that the ratio meets a preset first ratio threshold and does not meet a second ratio threshold.
Optionally, receiving temperature data acquired by the temperature sensor, and determining a voltage value corresponding to the temperature data includes: acquiring a current value of temperature data acquired by the temperature sensor; and converting the current value into a voltage value according to an acquisition circuit where the temperature sensor is located.
According to another aspect of the embodiments of the present invention, there is also provided a temperature correction apparatus, including: the determining module is used for determining the temperature distribution condition of the temperature acquisition object under different working condition parameters through thermal simulation; the receiving module is used for receiving temperature data acquired by a temperature sensor and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on the temperature acquisition object; the detection module is used for determining the fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold value; and the correction module is used for correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition.
According to another aspect of the embodiments of the present invention, there is also provided a computer storage medium, where the computer storage medium includes a stored program, and when the program runs, a device in which the computer storage medium is located is controlled to execute the temperature correction method described in any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes to perform the temperature correction method described in any one of the above.
In the embodiment of the invention, the temperature distribution condition of the temperature acquisition object under different working condition parameters is determined by thermal simulation; receiving temperature data acquired by a temperature sensor, and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object; determining a fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold; according to the number and position of the temperature sensors with faults and the temperature distribution condition, the temperature data of the temperature acquisition object is corrected, whether the temperature sensors have faults or not is determined according to the voltage values corresponding to the temperature data of the temperature sensors, and under the condition of faults, the temperature data corresponding to the temperature sensors with faults is corrected according to the temperature distribution condition and the position and number of the temperature sensors, so that the aims of correcting and complementing the temperature data with faults according to the temperature distribution condition of the temperature acquisition object and the temperature data pairs of other normal temperature sensors under the condition of the fault of the temperature sensors are fulfilled, the completeness of the temperature data of the temperature acquisition object is ensured, the temperature acquisition object is monitored according to the acquired temperature, and the technical effect of potential safety hazards of the temperature acquisition object possibly caused by temperature abnormity is effectively reduced, and then solved among the correlation technique through the mode of temperature sensor direct acquisition temperature, under the condition of temperature sensor trouble, can't effectively revise temperature data, lead to the technical problem of potential safety hazard.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of temperature correction according to an embodiment of the present invention;
FIG. 2 is a flow chart of temperature correction according to an embodiment of the present invention;
FIG. 3 is a flow chart of a specific temperature modification mode according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a temperature correction apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or 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.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a temperature correction method, it should be noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 1 is a flow chart of a temperature correction method according to an embodiment of the present invention, as shown in fig. 1, the method includes the steps of:
step S102, determining the temperature distribution condition of a temperature acquisition object under different working condition parameters through thermal simulation;
step S104, receiving temperature data acquired by temperature sensors, and determining voltage values corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object;
step S106, determining the fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold value;
and S108, correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition.
Through the steps, the temperature distribution conditions of the temperature acquisition object under different working condition parameters are determined through thermal simulation; receiving temperature data acquired by a temperature sensor, and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object; determining a fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold; according to the number and position of the temperature sensors with faults and the temperature distribution condition, the temperature data of the temperature acquisition object is corrected, whether the temperature sensors have faults or not is determined according to the voltage values corresponding to the temperature data of the temperature sensors, and under the condition of faults, the temperature data corresponding to the temperature sensors with faults is corrected according to the temperature distribution condition and the position and number of the temperature sensors, so that the aims of correcting and complementing the temperature data with faults under the condition of the faults of the temperature sensors and also according to the temperature distribution condition of the temperature acquisition object and the temperature data of other normal temperature sensors are fulfilled, the completeness of the temperature data of the temperature acquisition object is ensured, the temperature acquisition object is monitored according to the acquired temperature, and the technical effect of potential safety hazards of the temperature acquisition object possibly caused by temperature abnormity is effectively reduced, and then solved among the correlation technique through the mode of temperature sensor direct acquisition temperature, under the condition of temperature sensor trouble, can't effectively revise temperature data, lead to the technical problem of potential safety hazard.
The thermal simulation can be carried out through simulation software, the temperature acquisition object can be a battery module of an automobile, and the battery core, module parameters and corresponding current working conditions of the battery module are input into the simulation software to obtain the temperature distribution condition under a specific working condition. Specifically, the current working conditions can be changed for the same battery module, and the temperature distribution condition corresponding to a plurality of current working conditions is obtained.
The temperature distribution can be described by the ratio of the temperatures of different positions and parts, for example, the battery module can include 4 single batteries, and the temperature ratio of the 4 single batteries can be used to describe the temperature distribution of the battery module. In addition, the description can be also performed by setting the ratio of the temperatures of the positions of the temperature sensors, for example, 10 temperature sensors are provided on the battery module, and the ratio of the temperatures of the positions of the 10 temperature sensors can also be used to describe the temperature distribution.
In addition, the temperature distribution can be displayed through a temperature cloud chart, and the temperature distribution is described.
After temperature distribution conditions under different working condition parameters are obtained, temperature data acquired by a plurality of temperature sensors arranged on a temperature acquisition object are received, namely the data are directly transmitted after the temperature sensors acquire the temperature. From this AD value, a voltage value can be calculated.
Whether the temperature sensor fails or not can be determined according to the voltage value of the temperature data of the temperature sensor, and specifically, the temperature sensor fails under the condition that the voltage value meets a preset voltage threshold value. The preset voltage threshold may be a voltage threshold of a normal voltage at which the temperature sensor normally operates, which is obtained through statistics.
After the temperature sensor is determined to be faulty, the reliability of the temperature data acquired by the temperature sensor is greatly reduced, so that the temperature data of the temperature sensor needs to be corrected by other temperature sensors without faults. Specifically, the temperature data of the temperature acquisition object is corrected according to the number and the positions of the temperature sensors with faults and the temperature distribution condition. Therefore, whether the temperature sensor fails or not is determined according to the voltage value corresponding to the temperature data of the temperature sensor, and under the condition of failure, the temperature data corresponding to the failed temperature sensor is corrected according to the temperature distribution condition and the positions and the number of the temperature sensors, so that the aims of correcting and complementing the temperature data of the failure according to the temperature distribution condition of a temperature acquisition object and the temperature data of other normal temperature sensors under the condition of failure of the temperature sensor are fulfilled.
The completeness of the temperature data of the temperature acquisition object is guaranteed, the temperature acquisition object is monitored according to the acquired temperature, the technical effect of potential safety hazards caused by temperature abnormity of the temperature acquisition object is effectively reduced, the problem that the temperature data cannot be effectively corrected and the potential safety hazards are caused in the mode of directly acquiring the temperature through a temperature sensor in the related art is solved.
Optionally, the correcting the temperature data of the temperature acquisition object according to the number and the position of the temperature sensors with faults and the temperature distribution condition includes: determining whether to correct the temperature data of the temperature acquisition object according to the number of the failed temperature sensors; and under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined and a preset first ratio threshold is met, correcting the temperature data of the temperature acquisition object according to the position and the temperature distribution condition of the temperature sensors with faults.
The above determining whether to correct the temperature data of the temperature acquisition object according to the number of the failed temperature sensors may be that a ratio of the number of the failed temperature sensors to the total number of the temperature sensors does not exceed a first ratio threshold, for example, does not exceed 50%, because the number of the failed temperature sensors is too large, the reliable temperature data obtained by the temperature sensors which normally operate is reduced, and thus the accuracy of the temperature correction made by the temperature correction may not meet the requirement, and therefore, the temperature data of the failed temperature sensors may be corrected within the ratio threshold.
And under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined and a preset first ratio threshold is met, correcting the temperature data of the temperature acquisition object according to the position and the temperature distribution condition of the temperature sensors with faults. Thereby ensuring the accuracy of the correction of the temperature data of the failed temperature sensor.
Optionally, the correcting the temperature data of the temperature acquisition object according to the position and the temperature distribution condition of the temperature sensor with the fault includes: according to the temperature distribution condition, determining the temperature ratios of different positions of the temperature acquisition object under the condition that the working condition parameters corresponding to the current temperature data to be corrected are consistent; determining the correction temperature of the position of the temperature sensor with the fault according to the temperature ratio and the temperature data acquired by the temperature sensor with normal operation; and taking the corrected temperature as temperature data acquired by the temperature sensor with the fault so as to correct the temperature data of the temperature acquisition object.
The temperature ratio can be used for characterizing the temperature distribution of the temperature acquisition object. The correction temperature of the position where the temperature sensor with the fault is located can be determined according to the temperature ratio and the temperature data collected by the temperature sensor which operates normally, so that the temperature data of the temperature collection object can be corrected.
Optionally, determining the corrected temperature of the location where the faulty temperature sensor is located according to the temperature ratio and the temperature data collected by the temperature sensors operating normally includes: respectively determining the ratio of the failed temperature sensor to a plurality of normally operating temperature sensors; taking the product of the ratio and the temperature collected by the normally-operated temperature sensor corresponding to the ratio as a corrected value of the normally-operated temperature sensor corresponding to the ratio to the failed temperature sensor; and averaging according to the corrected values of the plurality of normally-operated temperature sensors to the failed temperature sensor to determine the corrected temperature.
Taking a temperature collection object as a battery module as an example, 4 NTCs are arranged in the battery module, the 4 NTCs are respectively distributed at the centers of the surfaces of 4 battery cells, the NTCs are respectively numbered as 1, 2, 3 and 4, and the temperature ratio is a: b: c: d. T1, T2, T3, T4 are the temperature of monomer No. 1, monomer No. 2, monomer No. 3 and monomer No. 4, respectively. If the number of failures is less than 40%, namely one NTC fails, the corresponding correction strategy is as follows:
if 1 fails: then
If 2 fails: then
And so on.
If the number of the failed NTCs is more than 40% but less than or equal to 50%, namely two failures are determined, the following strategy is adopted for correction:
if 1, 2 fails, then
If 2, 3 fails, then
And so on. A correction temperature is determined.
Optionally, the method further includes: under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined and does not meet a preset first ratio threshold, ending the current temperature acquisition; and (4) overhauling the temperature sensors until the ratio of the number of the failed temperature sensors to the total number of the temperature sensors is determined, and the preset first ratio threshold is met.
That is, when the ratio of the number of the faulty temperature sensors to the total number of the temperature sensors is determined and does not satisfy the preset first ratio threshold, it is described that the ratio of the number of the faulty temperature sensors to the total number of the temperature sensors is too large, the ratio of the faulty temperature sensors is too high, and the temperature data of the faulty temperature sensors is corrected by using the temperature data of the normal temperature sensors, which causes the problems of low accuracy and poor stability. Therefore, all the temperature sensors are directly powered off, and the temperature sensors are overhauled and replaced until the number of the failed temperature sensors meets the requirement of the first ratio prediction, so that the temperature data of the failed temperature sensors can be corrected.
Optionally, after the temperature data of the temperature acquisition object is corrected according to the position and the temperature distribution of the faulty temperature sensor when the ratio of the number of the faulty temperature sensors to the total number of the temperature sensors is determined and a preset first ratio threshold is met, the method further includes: determining whether the ratio meets a second ratio threshold value under the condition that the ratio meets a preset first ratio threshold value; and under the condition that the ratio meets a preset first ratio threshold value and does not meet a second ratio threshold value, limiting the power of the temperature acquisition object.
In case the first ratio threshold is met, it is stated that a temperature correction may be possible, but within the first ratio threshold there may be different situations, including that the number of faulty temperature sensors is relatively small, e.g. smaller than a second ratio threshold, which is smaller than the first ratio threshold. Or the number of the failed temperature sensors is larger, for example, greater than or equal to the second ratio threshold, and smaller than the first ratio threshold, although the number of the failed temperature sensors at this time can meet the requirement for correction, the number is still larger in comparison, so that the power of the temperature acquisition object is limited while the temperature is corrected, thereby effectively preventing potential safety hazards caused by untimely temperature control due to overhigh power, and further improving the safety of temperature monitoring.
Optionally, receiving temperature data acquired by the temperature sensor, and determining a voltage value corresponding to the temperature data includes: acquiring a current value of temperature data acquired by a temperature sensor; and converting the current value into a voltage value according to an acquisition circuit where the temperature sensor is located.
For example, according to the AD value acquired by the temperature sensor NTC, the AD value is converted into a voltage value according to the acquisition circuit, and whether the temperature sensor NTC is failed at that time is determined according to the voltage value, so as to obtain the position and the number of the failed temperature sensors NTC.
It should be noted that the present application also provides an alternative implementation, and the details of the implementation are described below.
According to the embodiment, the temperature distribution condition of the battery module is obtained by carrying out thermal simulation on the battery module, the number and the position of the NTC which fails are judged when the NTC fails, and the temperature distribution condition obtained by simulation is utilized to correct the temperature which fails, so that a better basis is provided for other functions of the battery management system, and the battery management system has good robustness.
Terms that may appear in the present embodiment are explained first:
NTC temperature sensor
C is the nominal capacity of the battery, 1C means that charging and discharging are performed at a rate of 1 capacity, and if C is 100AH, 1C means that discharging is performed at a current of 100A.
BMS, battery management system.
Robustness refers to the stability of the system under abnormal and dangerous conditions.
This embodiment will obtain the battery module temperature distribution condition through carrying out thermal simulation to the battery module, when the NTC became invalid, judge the NTC number and the position that became invalid, utilize the temperature distribution condition that the simulation obtained to revise the temperature that became invalid to for battery management system's other functions provide better foundation, make battery management system have better user experience, better security and better robustness.
Fig. 2 is a flow chart of temperature correction according to an embodiment of the present invention, which, as shown in fig. 2, includes the following steps:
1. obtaining the module temperature distribution condition according to the thermal simulation of the battery module, and inputting parameters of the battery core and the module and corresponding current working conditions by using thermal simulation software to obtain the temperature distribution condition under specific working conditions. If the current is set to be respectively; 0.1C, 0.3C, 0.5C, 1C, 1.5C, 2C. The resulting temperature profiles are integrated.
The ratio of the temperature distribution can be obtained by simplifying the temperature distribution under various currents, for example, the battery module comprises 4 single batteries, and the ratio of the temperature distribution of the 4 single batteries is simplified to a: b: c: d.
2. According to the AD value acquired by NTCA circuit for converting the AD value into a voltage value (V)T) Judging whether the NTC is invalid at the moment and obtaining the position and the number of the invalid NTC according to the voltage value, and dividing the NTC invalid into three types: open circuit (V)T>a) Short circuit (V)T<b) Out of range (b)<VT<c，d<VT<a) Wherein the values of a, b, c and d are determined by the NTC parameter.
3. And correcting the temperature according to the number and the position of the invalid NTCs: and if the number of the failed NTCs is less than 40%, performing temperature correction, and the BMS does not perform other operations, if the number of the failed NTCs is more than 40% but less than or equal to 50%, performing temperature correction, and limiting the discharging and charging power of the whole vehicle, and if the number of the failed NTCs is more than 50%, not performing correction, and performing power-off operation.
Fig. 3 is a flowchart of a specific temperature correction method according to an embodiment of the present invention, and as shown in fig. 3, the temperature correction in the above steps is performed in the following specific manner:
4. taking 4 NTCs in a module as an example, the 4 NTCs are respectively distributed in the centers of the surfaces of the 4 monomers, and are respectively provided with NTC numbers of 1, 2, 3 and 4, and the temperature ratio is a: b: c: d. T1, T2, T3, T4 are the temperature of monomer No. 1, monomer No. 2, monomer No. 3 and monomer No. 4, respectively.
(1) If the number of failures is less than 40%, namely one NTC fails, the corresponding correction strategy is as follows:
if 1 fails: then
If 2 fails: then
If 3 fails: then
If 4 fails: then the
After the temperature is corrected by adopting the strategy, the BMS can work normally, and the corrected temperature is adopted for calculation and relevant heat management strategies.
(2) If the number of the failed NTCs is more than 40% but less than or equal to 50%, namely two failures are determined, the following strategy is adopted for correction:
if 1, 2 fails, then
If 1, 3 fails, then
If 1, 4 fails, then
If 2, 3 fails, then
If 2, 4 fails, then
If 3, 4 fails, then
And if the two NTCs fail, limiting the charging and discharging power.
(3) If more than 50% NTC failures occur, if the number of the NTC failures is more than 50%, no correction is made, and the power-off operation is carried out.
The parameters a, b, c and d are determined by the temperature distribution condition obtained by simulation.
The embodiment provides a temperature correction strategy when the NTC fails, and the temperature correction strategy is not limited by the number of the NTC and the method for obtaining the temperature distribution condition, and can be obtained by simulation or experimental method. Different NTC distribution positions may result in modified parameter variations, but the method principle is not changed.
In the embodiment, a temperature failure processing strategy is provided, and when the NTC fails, temperature correction is performed by judging the number and the position of the failed NTC. The BMS processing is different under different failure conditions, if the number of the failed NTCs is less than 40%, temperature correction is carried out, the BMS does not carry out any operation, if the number of the failed NTCs is more than 40% but less than or equal to 50%, temperature correction is carried out, the discharging and charging power of the whole vehicle is limited, and if the number of the failed NTCs is more than 50%, correction is not carried out, and power-off operation is carried out. The modification strategy can provide better basis for other functions of the battery management system, so that the battery management system has better user experience, better safety and better robustness.
Fig. 4 is a schematic diagram of a temperature correction apparatus according to an embodiment of the present invention, and as shown in fig. 4, according to another aspect of the embodiment of the present invention, there is also provided a temperature correction apparatus including: a determination module 42, a reception module 44, a detection module 46 and a correction module 48, which are described in detail below.
The determining module 42 is configured to determine, through thermal simulation, temperature distribution conditions of the temperature acquisition object under different working condition parameters; a receiving module 44, connected to the determining module 42, for receiving the temperature data acquired by the temperature sensors and determining the voltage values corresponding to the temperature data, wherein a plurality of temperature sensors are disposed on the temperature acquisition object; a detection module 46, connected to the receiving module 44, for determining a fault of the temperature sensor when the voltage value meets a preset voltage threshold; and a correction module 48, connected to the detection module 46, for correcting the temperature data of the temperature acquisition object according to the number and position of the failed temperature sensors and the temperature distribution.
By the device, the temperature distribution conditions of the temperature acquisition object under different working condition parameters are determined by the determination module 42 through thermal simulation; the receiving module 44 receives temperature data acquired by temperature sensors, and determines a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object; the detection module 46 determines that the temperature sensor is faulty if the voltage value meets a preset voltage threshold; the correcting module 48 determines whether the temperature sensor is faulty or not by correcting the temperature data of the temperature collecting object according to the number and position of the faulty temperature sensors and the temperature distribution, and under the fault condition, the temperature data corresponding to the faulty temperature sensor is corrected according to the temperature data corresponding to the voltage value of the temperature sensor, so that the temperature data of the temperature collecting object can be corrected and supplemented according to the temperature distribution of the temperature collecting object and the temperature data pairs of other normal temperature sensors, thereby ensuring the integrity of the temperature data of the temperature collecting object, monitoring the temperature collecting object according to the collected temperature, and effectively reducing the technical effect of potential safety hazard of the temperature collecting object possibly caused by abnormal temperature, and then solved among the correlation technique through the mode of temperature sensor direct acquisition temperature, under the condition of temperature sensor trouble, can't effectively revise temperature data, lead to the technical problem of potential safety hazard.
According to another aspect of the embodiments of the present invention, there is also provided a computer storage medium including a stored program, wherein when the program runs, an apparatus in which the computer storage medium is located is controlled to execute the temperature correction method of any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes a temperature correction method according to any one of the above methods.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute 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 (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method of temperature correction, comprising:
determining the temperature distribution condition of the temperature acquisition object under different working condition parameters through thermal simulation;
receiving temperature data acquired by a temperature sensor, and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on a temperature acquisition object;
determining that the temperature sensor fails when the voltage value meets a preset voltage threshold;
correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition;
according to the number and the positions of the temperature sensors with faults and the temperature distribution condition, the correction of the temperature data of the temperature acquisition object comprises the following steps:
determining whether to correct the temperature data of the temperature acquisition object according to the number of the failed temperature sensors;
under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined to meet a preset first ratio threshold, according to the temperature distribution condition, under the condition that working condition parameters corresponding to the current temperature data to be corrected are consistent, the temperature ratios of different positions of the temperature acquisition object are determined;
determining the correction temperature of the position of the temperature sensor with the fault according to the temperature ratio and the temperature data acquired by the temperature sensor with normal operation;
and taking the corrected temperature as the temperature data acquired by the failed temperature sensor so as to correct the temperature data of the temperature acquisition object.
2. The method of claim 1, wherein determining a corrected temperature for the location of the faulty temperature sensor based on the temperature ratio and temperature data collected by a properly functioning temperature sensor comprises:
determining the ratio of the failed temperature sensor to a plurality of normally operating temperature sensors respectively;
taking the product of the ratio and the temperature collected by the normally-operated temperature sensor corresponding to the ratio as a correction value of the normally-operated temperature sensor corresponding to the ratio to the failed temperature sensor;
and averaging according to the corrected values of the plurality of normally-operated temperature sensors to the failed temperature sensor to determine the corrected temperature.
3. The method of claim 1, further comprising:
under the condition that the ratio of the number of the failed temperature sensors to the total number of the temperature sensors is determined and the preset first ratio threshold value is not met, ending the current temperature acquisition;
and overhauling the temperature sensors until the ratio of the number of the failed temperature sensors to the total number of the temperature sensors is determined, and the preset first ratio threshold is met.
4. The method of claim 1, wherein in a case that a ratio of the number of faulty temperature sensors to the total number of temperature sensors is determined to satisfy a preset first ratio threshold, after the temperature data of the temperature acquisition object is corrected according to the location of the faulty temperature sensor and the temperature distribution, the method further comprises:
determining whether the ratio meets a second ratio threshold value under the condition that the ratio meets a preset first ratio threshold value;
and limiting the power of the temperature acquisition object under the condition that the ratio meets a preset first ratio threshold and does not meet a second ratio threshold.
5. The method of any one of claims 1 to 4, wherein receiving temperature data collected by a temperature sensor, and determining a voltage value corresponding to the temperature data comprises:
acquiring a current value of temperature data acquired by the temperature sensor;
and converting the current value into a voltage value according to an acquisition circuit where the temperature sensor is located.
6. A temperature correction device, characterized by comprising:
the determining module is used for determining the temperature distribution condition of the temperature acquisition object under different working condition parameters through thermal simulation;
the receiving module is used for receiving temperature data acquired by a temperature sensor and determining a voltage value corresponding to the temperature data, wherein a plurality of temperature sensors are distributed on the temperature acquisition object;
the detection module is used for determining the fault of the temperature sensor under the condition that the voltage value meets a preset voltage threshold value;
the correction module is used for correcting the temperature data of the temperature acquisition object according to the number and the positions of the temperature sensors with faults and the temperature distribution condition;
according to the number and the positions of the temperature sensors with faults and the temperature distribution condition, the correction of the temperature data of the temperature acquisition object comprises the following steps:
determining whether to correct the temperature data of the temperature acquisition object according to the number of the failed temperature sensors;
under the condition that the ratio of the number of the temperature sensors with faults to the total number of the temperature sensors is determined to meet a preset first ratio threshold, according to the temperature distribution condition, under the condition that working condition parameters corresponding to the current temperature data to be corrected are consistent, the temperature ratios of different positions of the temperature acquisition object are determined;
determining the correction temperature of the position of the temperature sensor with the fault according to the temperature ratio and the temperature data acquired by the temperature sensor with normal operation;
and taking the corrected temperature as the temperature data acquired by the failed temperature sensor so as to correct the temperature data of the temperature acquisition object.
7. A computer storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer storage medium is located to perform the temperature correction method according to any one of claims 1 to 5.
8. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the temperature correction method according to any one of claims 1 to 5 when running.
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| CN113465120B (en) * | 2021-04-27 | 2023-01-13 | 青岛海尔空调器有限总公司 | Method and device for detecting indoor temperature and intelligent air conditioner |
| CN113978311A (en) * | 2021-10-15 | 2022-01-28 | 潍柴动力股份有限公司 | Battery temperature correction method and device and electronic equipment |
| CN114649565B (en) * | 2022-02-19 | 2023-09-29 | 深圳市品众自动化设备有限公司 | Control method and system for lithium battery formation component equipment |
| CN114312302A (en) * | 2022-03-07 | 2022-04-12 | 江铃汽车股份有限公司 | Method and system for monitoring temperature state of engine |
| CN117576870B (en) * | 2024-01-15 | 2024-04-09 | 成都车晓科技有限公司 | Vehicle-mounted monitoring battery monitoring system |
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