CN117368573A - Insulation resistance precision detection device and method for power battery system - Google Patents
Insulation resistance precision detection device and method for power battery system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The embodiment of the application provides an insulation resistance precision detection device and method of a power battery system, and relates to the technical field of battery tests. The device comprises a variable resistance box, a variable resistance box and a control unit, wherein the variable resistance box is connected between a power battery and a power battery shell of the power battery system and is used for simulating insulation faults in the whole range of insulation faults under different states of the whole vehicle; and the insulation detection element is connected between the power battery and the power battery shell and is used for measuring the actual insulation resistance value of the power battery under the condition of simulating insulation faults of the whole vehicle in different states so as to compare with the measurement result of the battery management system. By simulating all insulation fault phenomena of the power battery in different states of the whole vehicle, the whole range of the occurrence of the insulation fault of the power battery of the whole vehicle is covered, whether the insulation resistance detection precision in the whole range meets the requirement is detected, and the problems of missing report and false report of the insulation fault caused by poor insulation precision in the existing method are solved.
Description
Technical Field
The application relates to the technical field of battery tests, in particular to an insulation resistance precision detection device and method of a power battery system.
Background
In the prior art, an initial verification is performed on the insulation resistance detection function of the battery management system, but the insulation value of the power storage battery in the insulation resistance detection environment is far more than 500 omega/V generally, for example, the common actual measurement value is more than 200MΩ, and the insulation resistance detection function of the battery management system is judged to be normal even though the accuracy is poor by comparison in the way, and is in normal coincidence with the actual insulation state.
However, in practice, if the accuracy of the insulation resistance detection function of the battery management system is poor, the accuracy thereof cannot be detected well in the prior art, and there are the following problems: when the detection value of the BMS is larger due to the poor insulation precision of the BMS, and the insulation fault is missed due to the larger detection value of the BMS, the safety accident occurs; because BMS's insulation accuracy is relatively poor, and its detected value is less, and it is normal when taking place the insulated value, because BMS detected value is less, probably lead to BMS misinformation insulation fault, lead to power battery can not normally work.
Disclosure of Invention
The embodiment of the application aims to provide an insulation resistance precision detection device and method of a power battery system, which are used for simulating all insulation fault phenomena of power batteries in different states of a whole vehicle, covering the whole range of the occurrence of the insulation faults of the power batteries of the whole vehicle, detecting whether the insulation resistance detection precision in the whole range meets the requirements or not, ensuring the detection precision, avoiding the problems of missing report and false report of the insulation faults, and solving the problems of missing report and false report of the insulation faults caused by poor insulation precision in the existing method.
The embodiment of the application provides an insulation resistance precision detection device of a power battery system, which comprises:
a power cell system for use as a test sample;
the variable resistance box is connected between a power battery and a power battery shell of the power battery system and is used for simulating insulation faults in the whole range of the insulation faults under different states of the whole vehicle;
the insulation detection element is connected between the power battery and the power battery shell and is used for measuring the actual insulation resistance value of the power battery under the condition of simulating insulation faults of the whole vehicle in different states;
and the controller is used for acquiring the actual insulation resistance value and the insulation detection value of the battery management system to detect insulation errors under different environment temperatures and insulation faults.
In the implementation process, through adjusting the resistance value size of the variable resistor box, the power battery insulation fault phenomenon of different states of the whole vehicle is simulated, and according to each power battery insulation fault state, the insulation detection element detects the actual insulation value of the power battery, and the insulation resistance value reported by the BMS is compared with the actual insulation value, so that whether the detection precision of the BMS insulation resistance in the whole range meets the requirement is detected, the precision of the insulation resistance detection function of the BMS is guaranteed, and the problems of BMS missing report and false report insulation fault and the like in a battery car are avoided.
The embodiment of the application also provides an insulation resistance precision detection method of the power battery system, which comprises the following steps:
charging a power battery at a set temperature to enable the power battery to be in a full-charge state;
adjusting the ambient temperature of the power battery to a target temperature;
the resistance value of the variable resistor box is adjusted to simulate all insulation faults of the whole vehicle power battery;
respectively acquiring an actual insulation resistance value and an insulation detection value by using an insulation detection element and a battery management system;
and detecting insulation errors by using the actual insulation resistance value and the insulation detection value.
In the implementation process, under the full-power state, whether the precision of the insulation resistance detection function of the real vehicle at different temperatures meets the requirement or not is detected, the full-range temperature covering the actual working condition of the power battery system is used for detecting the insulation resistance, a more accurate basis is provided for BMS control of the electric vehicle, the overall control effect and control reliability of the electric vehicle are improved, the detection precision is ensured, the problems of missing report and false report of insulation faults are avoided, and the problems of missing report and false report of insulation faults caused by poor insulation precision in the existing method are solved.
Further, the adjusting the resistance value of the variable resistor box to simulate the insulation fault of the whole vehicle power battery comprises:
the resistance value of the variable resistor box is adjusted to simulate the state that the insulation value of the power battery of the whole vehicle is R, and the insulation value R needs to cover the whole range of the insulation fault occurrence of the power battery of the whole vehicle.
In the implementation process, the resistance range of all insulation faults of the actual working condition of the power battery system is covered, and a more accurate basis is provided for BMS control of the electric automobile.
Further, the obtaining the actual insulation resistance value and the insulation detection value by using the insulation detection element and the battery management system respectively includes:
under the condition of shielding the insulation detection function of the battery management system, acquiring the actual insulation resistance value of the power battery in the current full-power state and the target temperature by using an insulation detection element;
and disconnecting the insulation detection element, recovering the insulation detection function of the battery management system, and acquiring an insulation detection value through the battery management system.
In the implementation process, the detection results of the insulation detection element and the battery management system are respectively passed through, and meanwhile, the insulation detection element and the battery management system are not simultaneously started, so that mutual interference between the insulation detection element and the battery management system is avoided, and the accuracy of the detection results is improved.
Further, the insulation error detection using the actual insulation resistance value and the insulation detection value includes:
based on the actual insulation resistance value and the insulation detection value, an insulation detection error is obtained;
and comparing the insulation detection error with an error threshold value to judge whether the insulation precision meets the requirement under the full power state and the current target temperature.
In the implementation process, insulation detection errors are calculated and compared with error thresholds, whether insulation precision meets requirements or not can be determined, and insulation precision is detected at different target temperatures and different insulation faults.
Further, the obtaining an insulation detection error based on the actual insulation resistance value and the insulation detection value includes:
calculating an insulation detection error by using the actual insulation resistance value and the insulation detection value:
ΔR＝ABS(R BMS -R actual measurement value )；
Wherein R is BMS Represents the insulation detection value, R Actual measurement value Indicating the actual insulation resistance value.
In the implementation process, the absolute value of the difference between the actual insulation resistance value and the insulation detection value is used as the insulation detection error, so that the difference between the actual insulation resistance value and the insulation detection value is quantized.
Further, the method further comprises:
and respectively adjusting the ambient temperature of the power battery to all preset target temperatures, and detecting the insulation resistance precision, wherein the target temperatures comprise 25 ℃,55 ℃,0 ℃ and-30 ℃.
In the implementation process, the insulation resistance precision detection at a plurality of different target temperatures is realized, and the whole vehicle environment working conditions at different temperatures can be simulated.
Further, the method further comprises:
after the insulation resistance precision detection at all target temperatures and all insulation values R is completed, the power battery is adjusted to a state of 30% residual electric quantity at the set temperature.
In the implementation process, after the precision detection is finished, the power battery is adjusted to be in a 30% residual electric quantity state at a set temperature, so that the power battery is kept in an RT state.
The embodiment of the application also provides electronic equipment, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic equipment to execute the insulation resistance precision detection method of the power battery system.
The embodiment of the application also provides a readable storage medium, wherein the readable storage medium stores computer program instructions, and when the computer program instructions are read and run by a processor, the insulation resistance precision detection method of the power battery system is executed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an insulation resistance precision detection device of a power battery system according to an embodiment of the present application;
fig. 2 is a flowchart of an insulation resistance accuracy detection method of a power battery system according to an embodiment of the present application;
FIG. 3 is a flowchart for obtaining an actual insulation resistance value and an insulation detection value according to an embodiment of the present application;
fig. 4 is a flowchart of insulation error detection provided in an embodiment of the present application;
fig. 5 is a flowchart of a method for testing insulation resistance accuracy of a BMS of a power battery system according to an embodiment of the present application.
Icon:
a 100-power battery system; 200-a power battery housing; 300-variable resistor box; 400-insulating table.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of an insulation resistance accuracy detecting device of a power battery system 100 according to an embodiment of the present disclosure. The device comprises a power battery, a variable resistance box 300 and an insulation detection element, wherein:
a power cell system 100 for use as a test sample;
power cell system 100: typically consisting of a power BATTERY module and a BMS (BATTERY MANAGEMENT SYSTEM ). BMS can improve the utilization ratio of battery, prevents that the battery from appearing overcharging and overdischarging, BMS in this application refer to the BMS that is used for in the car battery package.
Wherein the test sample ground point is here equivalent to the power cell housing 200.
The variable resistance box 300 is connected between the power battery of the power battery system 100 and the power battery shell 200, and is used for simulating insulation faults in the whole range of the insulation faults under different states of the whole vehicle;
illustratively, the varistor 300 may select a varistor 300 having a resistance in the range of 0 Ω to 11.11110mΩ, a minimum improvement of 10 Ω, and a precision of 1%, and may provide different resistance values, such as 0 Ω, 50kΩ, 100kΩ, 200kΩ, 300kΩ, 500kΩ, 1mΩ, etc., by rotating the button.
An insulation detection element connected between the power battery and the power battery case 200, for measuring an actual insulation resistance value of the power battery under the condition of simulating insulation faults of the whole vehicle in different states, so as to compare with a measurement result of a battery management system;
and the controller is used for acquiring the actual insulation resistance value and the insulation detection value of the battery management system to detect insulation errors under different environment temperatures and insulation faults.
For example, the insulation detection element may adopt a high-precision insulation meter 400, which is connected in series between the high-voltage positive power battery and the power battery housing 200, and is used for measuring the actual insulation resistance value of the power battery under the condition of simulating the insulation fault of the whole vehicle, comparing with the insulation value detected by the BMS, and determining whether the insulation inspection precision of the BMS meets the requirement.
According to the power battery insulation fault simulation system, the variable resistance box 300 is connected in series between the high-voltage positive power battery and the power battery shell 200, and the insulation fault phenomena of the power battery in different states of the whole vehicle are simulated by adjusting the resistance value of the variable resistance box 300. To every kind of power battery insulation fault state, insulating detection element all detects its actual insulation value, and the insulation resistance value that the measurement result of rethread contrast insulating detection element and BMS reported detects whether the BMS insulation resistance detection precision in the full scope satisfies the design requirement to guarantee the insulation resistance of BMS and detect the precision of function, avoid BMS to leak report and misinformation insulation fault scheduling problem in the battery car.
Example 2
An embodiment of the present application provides a method for detecting insulation resistance accuracy of a power battery system 100, based on the apparatus described in embodiment 1, as shown in fig. 2, which is a flowchart of a method for detecting insulation resistance accuracy of a power battery system 100, and the method includes the following steps:
s100: charging a power battery at a set temperature to enable the power battery to be in a full-charge state;
illustratively, the power cell system 100 is conditioned to a full state of charge at 25 ℃ for environmental adaptation.
The insulation detection power battery of the application selects a full-charge state, and the state that the whole vehicle is just fully charged is considered, because the requirement on the power battery is also the most severe at this time, the precision is detected in the full-charge state, and the obtained detection precision can meet the precision requirement under each working condition.
S200: adjusting the ambient temperature of the power battery to a target temperature;
the target temperature T needs to cover the full range of actual conditions of the power cell system 100.
S300: the resistance value of the variable resistance box 300 is adjusted to simulate all insulation faults of the whole vehicle power battery;
specifically, the resistance value of the variable resistor box 300 is adjusted to simulate the state that the insulation value of the power battery of the whole vehicle is R, and the insulation value R needs to cover the whole range where the insulation fault of the power battery of the whole vehicle occurs.
S400: respectively acquiring an actual insulation resistance value and an insulation detection value by using an insulation detection element and a battery management system;
s500: and detecting insulation errors by using the actual insulation resistance value and the insulation detection value.
As shown in fig. 3, a flowchart for acquiring an actual insulation resistance value and an insulation detection value is shown, specifically, S400 includes the following steps:
s401: under the condition of shielding the insulation detection function of the battery management system, acquiring the actual insulation resistance value of the power battery in the current full-power state and the target temperature by using an insulation detection element;
s402: and disconnecting the insulation detection element, recovering the insulation detection function of the battery management system, and acquiring an insulation detection value through the battery management system.
As shown in fig. 4, an insulation error detection flowchart is shown, specifically, S500 includes the following steps:
s501: based on the actual insulation resistance value and the insulation detection value, an insulation detection error is obtained;
specifically, the insulation detection error is calculated using the actual insulation resistance value and the insulation detection value:
ΔR＝ABS(R BMS -R actual measurement value )；
Wherein R is BMS Represents the insulation detection value, R Actual measurement value Indicating the actual insulation resistance value.
S502: and comparing the insulation detection error with an error threshold value to judge whether the insulation precision meets the requirement under the full power state and the current target temperature.
The method further comprises the steps of:
and respectively adjusting the ambient temperature of the power battery to all preset target temperatures, and detecting the insulation resistance precision, wherein the target temperatures comprise 25 ℃,55 ℃,0 ℃ and-30 ℃.
The target temperature is set to 25 ℃,55 ℃,0 ℃ and-30 ℃, all the environment temperature ranges of the power battery system 100 under the whole vehicle working condition are covered, the insulation resistance precision detection under a plurality of different target temperatures is realized, and the whole vehicle environment working condition under different temperatures can be simulated.
The method further comprises the steps of:
after the insulation resistance precision detection at all target temperatures and all insulation values R is completed, the power battery is adjusted to a state of 30% residual electric quantity at the set temperature.
According to the method, the requirements are met by the precision of the insulation resistance detection function under different temperatures of the real vehicle, the insulation resistance detection function is detected at the full range temperature covering the actual working condition of the power battery system 100, a more accurate basis is provided for BMS control of the electric vehicle, the overall control effect and the control reliability of the electric vehicle are improved, the high quality and the high reliability of the product of the power battery system 100 are guaranteed, the quality problem caused by related problems in the market is prevented, safety accidents are caused, and the like are reduced, and losses caused by the safety accidents are reduced.
The method can be applied to the field of battery testing in a new energy battery laboratory, can also be expanded to testing of other parts, and is not limited in any way.
As shown in fig. 5, a flowchart of a method for testing insulation resistance accuracy of the power battery system 100 is illustrated, and a specific detection method of the present application is as follows:
step S10: environmental adaptation at 25 ℃ adjusts the power cell system 100 to a full-power state;
step S20: environmental adaptation at a target temperature T, which is required to cover the full range of actual operating conditions of the power cell system 100, such as t=25 ℃,55 ℃,0 ℃ and-30 ℃;
step S30: detecting the insulation resistance precision of the BMS under the full-power state and the target temperature T;
step S31: the shielding BMS insulation detection function is used for adjusting the resistance R of the variable resistor box 300 to be a target resistance value and simulating the state that the insulation value of the power battery of the whole vehicle is R; the resistor R needs to cover the full range of the insulation occurrence of the whole vehicle power battery to comprehensively detect whether the accuracy of the BMS meets the requirements, such as r=0Ω, 50kΩ, 100deg.kΩ, 200kΩ, 300kΩ, 500kΩ and 1mΩ;
step S32: detecting the actual insulation resistance value of the power battery in the current state by using the insulation table 400 to obtain an R actual measurement value, and disconnecting the insulation table 400;
step S33: recovering the BMS insulation detection function, and reading the insulation value detected by the BMS to obtain RBMS;
step S34: BMS insulation detection error Δr=abs (R BMS -R Actual measurement value ) Comparing the BMS insulation detection error DeltaR with the approval requirement, and judging whether the BMS insulation detection precision meets the requirement when the actual insulation value is 0Ω under the current full power state and the target temperature T;
step S35: the resistance value of the variable resistor box 300 is adjusted, S31-S34 are repeated until detection of the insulation resistance precision of the BMS corresponding to all the target resistance values R under the current full-power state and the target temperature T is completed;
step S40: and repeating the steps S20-S30 until the insulation resistance precision of all sampling points of all target temperatures T is detected in the full-power state.
Step S50: environmental adaptation at 25 ℃ adjusts the power cell system 100 to a 30% soc state.
According to the method, all insulation fault phenomena of the power battery in different states of the whole vehicle are simulated, the whole range of the occurrence of the insulation faults of the power battery of the whole vehicle is covered, whether the insulation resistance detection precision in the whole range meets the requirement is detected, the detection precision is ensured, the problems of missing report and false report of the insulation faults are avoided, and the problems of missing report and false report of the insulation faults caused by poor insulation precision in the existing method are solved.
The embodiment of the application also provides an electronic device, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic device to execute the insulation resistance precision detection method of the power battery system described in the embodiment 1.
The embodiment of the present application further provides a readable storage medium, in which computer program instructions are stored, and when the computer program instructions are read and executed by a processor, the insulation resistance accuracy detection method of the power battery system described in embodiment 1 is executed.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners as well. The apparatus embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules 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 application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An insulation resistance accuracy detection device of a power battery system, the device comprising:
a power cell system for use as a test sample;
the variable resistance box is connected between a power battery and a power battery shell of the power battery system and is used for simulating insulation faults in the whole range of the insulation faults under different states of the whole vehicle;
the insulation detection element is connected between the power battery and the power battery shell and is used for measuring the actual insulation resistance value of the power battery under the condition of simulating insulation faults of the whole vehicle in different states;
and the controller is used for acquiring the actual insulation resistance value and the insulation detection value of the battery management system to detect insulation errors under different environment temperatures and insulation faults.
2. A method for detecting insulation resistance accuracy of a power battery system, the method comprising:
charging a power battery at a set temperature to enable the power battery to be in a full-charge state;
adjusting the ambient temperature of the power battery to a target temperature;
the resistance value of the variable resistor box is adjusted to simulate all insulation faults of the whole vehicle power battery;
respectively acquiring an actual insulation resistance value and an insulation detection value by using an insulation detection element and a battery management system;
and detecting insulation errors by using the actual insulation resistance value and the insulation detection value.
3. The method for detecting insulation resistance accuracy of a power battery system according to claim 2, wherein the adjusting the resistance value of the variable resistor box to simulate an insulation failure of a whole vehicle power battery comprises:
the resistance value of the variable resistor box is adjusted to simulate the state that the insulation value of the power battery of the whole vehicle is R, and the insulation value R needs to cover the whole range of the insulation fault occurrence of the power battery of the whole vehicle.
4. The insulation resistance accuracy detecting method of a power battery system according to claim 2, wherein the obtaining of the actual insulation resistance value and the insulation detection value by the insulation detection element and the battery management system, respectively, comprises:
under the condition of shielding the insulation detection function of the battery management system, acquiring the actual insulation resistance value of the power battery in the current full-power state and the target temperature by using an insulation detection element;
and disconnecting the insulation detection element, recovering the insulation detection function of the battery management system, and acquiring an insulation detection value through the battery management system.
5. The insulation resistance accuracy detection method of a power battery system according to claim 2, wherein the insulation error detection using the actual insulation resistance value and the insulation detection value comprises:
based on the actual insulation resistance value and the insulation detection value, an insulation detection error is obtained;
and comparing the insulation detection error with an error threshold value to judge whether the insulation precision meets the requirement under the full power state and the current target temperature.
6. The method for detecting insulation resistance accuracy of a power battery system according to claim 5, wherein the obtaining insulation detection error based on the actual insulation resistance value and the insulation detection value includes:
calculating an insulation detection error by using the actual insulation resistance value and the insulation detection value:
ΔR＝ABS(R BMS -R actual measurement value )；
Wherein R is BMS Represents the insulation detection value, R Actual measurement value Indicating the actual insulation resistance value.
7. The insulation resistance accuracy detection method of a power battery system according to claim 2, characterized in that the method further comprises:
and respectively adjusting the ambient temperature of the power battery to all preset target temperatures, and detecting the insulation resistance precision, wherein the target temperatures comprise 25 ℃,55 ℃,0 ℃ and-30 ℃.
8. The insulation resistance accuracy detection method of a power battery system according to claim 2, characterized in that the method further comprises:
after the insulation resistance precision detection at all target temperatures and all insulation values R is completed, the power battery is adjusted to a state of 30% residual electric quantity at the set temperature.
9. An electronic device comprising a memory for storing a computer program and a processor that runs the computer program to cause the electronic device to execute the insulation resistance accuracy detection method of the power battery system according to any one of claims 2 to 8.
10. A readable storage medium having stored therein computer program instructions which, when read and executed by a processor, perform the insulation resistance accuracy detection method of the power cell system of any one of claims 2 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311311479.6A CN117368573A (en) | 2023-10-10 | 2023-10-10 | Insulation resistance precision detection device and method for power battery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311311479.6A CN117368573A (en) | 2023-10-10 | 2023-10-10 | Insulation resistance precision detection device and method for power battery system |
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| CN202311311479.6A Pending CN117368573A (en) | 2023-10-10 | 2023-10-10 | Insulation resistance precision detection device and method for power battery system |
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