CN112698234A - Battery pack insulation abnormity reason analysis method and device and computer equipment - Google Patents
Battery pack insulation abnormity reason analysis method and device and computer equipment Download PDFInfo
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- CN112698234A CN112698234A CN202011575873.7A CN202011575873A CN112698234A CN 112698234 A CN112698234 A CN 112698234A CN 202011575873 A CN202011575873 A CN 202011575873A CN 112698234 A CN112698234 A CN 112698234A
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The embodiment of the invention discloses a method and a device for analyzing the reason of insulation abnormality of a battery pack and computer equipment, wherein the method comprises the following steps: if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value, after the battery management system of the battery pack is opened by taking the cover, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected; and if so, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after the acquisition line of the battery pack is removed. The reason for the insulation abnormity is analyzed according to the design principle of the battery pack circuit, and the reason for the insulation abnormity can be determined more accurately and more quickly.
Description
Technical Field
The invention relates to the field of batteries, in particular to a method and a device for analyzing causes of insulation abnormality of a battery pack and computer equipment.
Background
A battery system of a general pure electric vehicle belongs to the class-I equipment with the voltage class of B and is protected by basic insulation measures. When the battery pack is insulated and abnormal, a great potential safety hazard may exist, a short circuit can be seriously caused, and great threat is caused to property and human bodies of users, so that the reason analysis of the insulation abnormality of the battery pack is particularly important, but at present, the root cause of the problem is difficult to accurately find out about the insulation abnormality of the battery pack, possible abnormal points are searched without reason, and the effect is very little.
Disclosure of Invention
In view of the above problems, the present invention provides a method, an apparatus and a computer device for analyzing causes of insulation abnormality of a battery pack.
One embodiment of the present invention provides a method for analyzing causes of insulation abnormality of a battery pack, including:
determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value;
if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value, after a battery management system of the battery pack is disconnected by taking a cover, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the collection line of the battery pack is removed;
if the total positive and the total negative soft copper bars of the battery pack are consistent, after the total positive and the total negative soft copper bars of the battery pack are disconnected, whether the insulation resistance values of the total positive and the total negative of a battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value is determined;
if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are less than or equal to the preset insulation resistance threshold value is determined;
if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after a connecting copper bar of the battery pack module is removed, whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value is determined;
and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link.
The embodiment of the invention provides a method for analyzing the reason of the insulation abnormality of a battery pack, wherein the method for analyzing the reason of the insulation abnormality of the battery pack according to the determination result of each link comprises the following steps:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the battery management system of the battery pack is disconnected by taking the cover, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the battery management system, and stopping checking operation;
and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the battery management system.
The method for analyzing the reason for the insulation abnormality of the battery pack according to the embodiment of the present invention analyzes the reason for the insulation abnormality of the battery pack according to the determination result of each link, and further includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the main wire harness, and stopping checking operation;
and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the main wire harness.
Further, the method for analyzing the cause of the insulation abnormality of the battery pack according to the embodiment of the present invention, where the analyzing the cause of the insulation abnormality of the battery pack according to the determination result of each link, further includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding measured value of the initial insulation resistance after the acquisition line of the battery pack is removed, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module, and stopping the troubleshooting operation;
and if the current insulation resistance value of each connector to the ground is smaller than or equal to a preset insulation resistance threshold value, continuously executing the inspection operation after determining that the battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module.
The embodiment of the present invention further includes analyzing the cause of the insulation abnormality of the battery pack according to the determination result of each link:
and if the total positive and total negative soft copper bars of the battery pack are disconnected, determining that the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value, and determining that the bottom of the battery pack module has a metal piercing phenomenon.
Further, the embodiment of the present invention further includes analyzing the cause of the abnormal insulation of the battery pack according to the determination result of each link, and further includes:
and if the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value after the heating wire of the battery pack is disconnected, determining that the heating film of the battery pack module has a short circuit phenomenon.
The embodiment of the present invention further includes analyzing the cause of the insulation abnormality of the battery pack according to the determination result of each link:
after the connecting copper bars of the battery pack module are removed, the insulation resistance value of each sub-module of the battery pack module to the ground is determined to be larger than a preset insulation resistance threshold value, and then the phenomenon that the periphery of each sub-module is bad is determined.
An embodiment of the present invention provides a battery pack insulation abnormality cause analysis apparatus, including:
the first judgment module is used for determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value;
the second judging module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after a battery management system of the battery pack is disconnected by taking a cover if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value;
the third judgment module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after the main line of the battery management system is disconnected if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
the fourth judgment module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after the acquisition line of the battery pack is removed if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
the fifth judgment module is used for determining whether the total positive and total negative insulation resistance values of the battery pack module of the battery pack are smaller than or equal to a preset insulation resistance threshold value or not after the total positive and total negative soft copper bars of the battery pack are disconnected if the total positive and total negative soft copper bars of the battery pack are consistent;
the sixth judging module is used for determining whether the total positive and total negative insulation resistance values of the battery pack module of the battery pack are less than or equal to a preset insulation resistance threshold value or not after the heating wire of the battery pack is disconnected;
the seventh judging module is used for determining whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to a preset insulation resistance threshold value or not after a connecting copper bar of the battery pack module is removed if the insulation resistance value is less than or equal to the preset insulation resistance threshold value;
and the insulation abnormity reason analysis module is used for analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link.
Embodiments of the present invention relate to a computer apparatus including a memory for storing a computer program that executes a battery pack insulation abnormality cause analysis method according to an embodiment of the present invention when the computer program runs on a processor, and the processor.
Embodiments of the present invention relate to a readable storage medium storing a computer program that executes, when running on a processor, a method for analyzing causes of insulation abnormality of a battery pack according to an embodiment of the present invention.
The invention discloses a method for analyzing the reason of insulation abnormality of a battery pack, which comprises the following steps: determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value; if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value, after a battery management system of the battery pack is disconnected by taking a cover, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the collection line of the battery pack is removed; if the total positive and the total negative soft copper bars of the battery pack are consistent, after the total positive and the total negative soft copper bars of the battery pack are disconnected, whether the insulation resistance values of the total positive and the total negative of a battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are less than or equal to the preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after a connecting copper bar of the battery pack module is removed, whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value is determined; and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link. According to the scheme, the insulation abnormity reason is analyzed according to the design principle of the battery pack circuit, and the insulation abnormity reason can be determined more accurately and more quickly.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a schematic flow chart illustrating a method for analyzing causes of insulation abnormality of a battery pack according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a battery pack structure provided by an embodiment of the invention;
fig. 3 is a schematic flow chart illustrating another method for analyzing causes of insulation abnormality of a battery pack according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a process of checking whether a short circuit phenomenon exists inside a battery management system of a battery pack according to an embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a process of checking whether a short circuit phenomenon exists inside a main harness of a battery pack according to an embodiment of the present invention;
fig. 6 is a schematic flow chart illustrating a process of checking whether a battery pack module electric core of a battery pack is damaged or whether welding slag exists inside the battery pack module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram illustrating an analysis apparatus for a cause of insulation abnormality of a battery pack according to an embodiment of the present invention.
Description of the main element symbols:
1-battery pack insulation abnormality cause analysis device; 10-a first judgment module; 20-a second judgment module; 30-a third judgment module; 40-a fourth judging module; 50-a fifth judging module; 60-a sixth judging module; 70-a seventh judging module; 80-insulating abnormal cause analysis module.
Detailed Description
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.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
As shown in fig. 2, the Battery pack or the Battery System includes a fast charging connector, a slow charging connector, a communication connector, a main positive and negative connector, a ground wire, a Battery pack, a Battery Management System (BMS), a Battery pack total positive electrode leading-out terminal, a Battery pack total negative electrode leading-out terminal, a main wire harness of the Battery Management System, a Battery pack collecting wire, a Battery pack total positive and total negative soft copper bars, a Battery pack heating wire, a Battery pack module, and the like.
The battery pack is arranged in a box body of the battery pack and comprises N battery cells or modules, N is an integer larger than 1, the battery cells or the modules are connected through soft copper bars, and insulating partition plates are arranged between the battery cells or the modules; the battery pack is electrically connected with a battery pack total positive leading-out end and a battery pack total negative leading-out end respectively; BMS slave plate and BMS mainboard pass through principal and subordinate communication pencil and are connected, and the BMS slave plate links to each other with the group battery, and the BMS slave plate is connected with the minimum unit through gathering the pencil, gathers basic information such as monomer voltage or temperature, and the whole car communication pencil of BMS mainboard connection and interface.
The invention discloses a method for analyzing the reason of battery pack insulation abnormity, which comprises the steps of disassembling a battery pack when the insulation resistance value of each connector of the battery pack to the ground is determined not to meet the preset standard, and determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding measured value of the initial insulation resistance after a battery management system of the battery pack is disconnected by taking a cover; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the collection line of the battery pack is removed; if the total positive and the total negative soft copper bars of the battery pack are consistent, after the total positive and the total negative soft copper bars of the battery pack are disconnected, whether the insulation resistance values of the total positive and the total negative of a battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are less than or equal to the preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after a connecting copper bar of the battery pack module is removed, whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value is determined; and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link. According to the scheme, the insulation abnormity reason is analyzed according to the design principle of the battery pack circuit, and the insulation abnormity reason can be determined more accurately and more quickly.
Example 1
In the present embodiment, referring to fig. 1, it is shown that a method for analyzing causes of insulation abnormality of a battery pack includes the following steps:
s10: and determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value.
The insulation resistance value of each connector of the battery pack to the ground can be read by the upper computer through the upper computer, for example, the charging connector, the slow charging connector, the communication connector and the main positive and negative connectors, whether the insulation resistance value meets the delivery standard or not is judged, and if the insulation resistance value meets the delivery standard, namely is larger than 550M omega, the insulation resistance value can be fed back to after-sales personnel; and if the insulation resistance values read by the upper computer do not meet the delivery standard, namely are less than or equal to 550M omega, the reason for the insulation abnormality of the battery pack needs to be checked. When the insulation resistance value read by the upper computer does not meet the standard, an insulation table is needed to further verify whether the insulation resistance value of each connector of the battery pack to the ground is smaller than or equal to a preset insulation resistance threshold value, and the preset insulation resistance threshold value is 550M omega.
If the insulation resistance value of a certain connector to the ground is less than or equal to the insulation resistance threshold value, step S20 is executed to check whether a short circuit phenomenon exists inside the battery management system of the battery pack.
S20: and after the cover is taken out and the battery management system of the battery pack is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not.
If the two are consistent, step S30 is executed to check whether there is a short circuit phenomenon inside the main harness of the battery pack.
S30: and after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value.
If yes, step S40 is executed to check whether the battery pack module electric core of the battery pack is damaged or whether welding slag exists inside the battery pack module.
S40: and after the acquisition line of the battery pack is removed, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value.
If the two are consistent, step S50 is executed to check whether there is a metal piercing phenomenon at the bottom of the battery pack module of the battery pack.
S50: and after disconnecting the total positive and total negative soft copper bars of the battery pack, determining whether the insulation resistance values of the total positive and total negative of the battery pack module of the battery pack to the ground are less than or equal to a preset insulation resistance threshold value.
If the insulation resistance is less than or equal to the preset insulation resistance threshold value, step S60 is executed to check whether the heating film of the battery pack module has a short circuit phenomenon.
S60: after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value or not is determined.
If the insulation resistance is less than or equal to the preset insulation resistance threshold value, step S70 is executed to check the existence of defects around each sub-module.
S70: and after the connecting copper bar of the battery pack module is removed, determining whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to a preset insulation resistance threshold value.
S80: and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link.
For example, referring to fig. 3, if it is determined in step S10 that the measured initial insulation resistance values of the connectors to ground are all greater than the preset insulation resistance threshold, it is determined S100: the battery pack has no abnormality.
For example, referring to fig. 3, if it is determined in step S20 that the current insulation resistance value of each connector to ground does not match the corresponding measured initial insulation resistance value, it is determined S200: the battery management system of the battery pack has a short circuit phenomenon inside.
For example, referring to fig. 3, if it is determined in step S30 that the current insulation resistance value of each connector to ground does not match the corresponding measured initial insulation resistance value, then determination S300: the short circuit phenomenon exists inside the main wire harness of the battery pack.
For example, referring to fig. 3, if it is determined in step S40 that the current insulation resistance value of each connector to ground does not match the corresponding measured initial insulation resistance value, then determination S400 is performed: the battery package module electricity core of battery package damages or there is the welding slag in the battery package module inside.
For example, referring to fig. 3, if it is determined at step S50 that the insulation resistance values of the battery pack modules of the battery pack, total positive and total negative, with respect to ground, are greater than the preset insulation resistance threshold value, it is determined at step S500: there may be a metal piercing phenomenon at the bottom of the battery pack module of the battery pack.
For example, referring to fig. 3, if it is determined at step S60 that the insulation resistance values of the battery pack modules of the battery pack, total positive and total negative, with respect to ground, are greater than the preset insulation resistance threshold value, it is determined at step S600: the heating film of the battery pack module has a short circuit phenomenon.
For example, referring to fig. 3, if it is determined in step S70 that the insulation resistance values of the respective sub-module groups of the battery pack module of the battery pack to the ground are all greater than the preset insulation resistance threshold value, it is determined in step S700: the periphery of each sub-module has bad phenomenon. Further, look over whether there is battery electrolytic liquid at the bad module periphery of insulation, whether the inspection has the damaged phenomenon of electric core insulating film, confirm that battery package module electricity core damages or has the weeping phenomenon, if do not, disassemble battery package module curb plate and end plate, pay attention to observing whether there is metal or other welding slag to drop and lead to pushing up to wear electric core insulating film and curb plate short circuit and make insulation resistance value not up to standard disassembling the in-process.
The method for analyzing the reason for the insulation abnormality of the battery pack disclosed in the embodiment comprises the following steps: determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value; if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value, after a battery management system of the battery pack is disconnected by taking a cover, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value; if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the collection line of the battery pack is removed; if the total positive and the total negative soft copper bars of the battery pack are consistent, after the total positive and the total negative soft copper bars of the battery pack are disconnected, whether the insulation resistance values of the total positive and the total negative of a battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are less than or equal to the preset insulation resistance threshold value is determined; if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after a connecting copper bar of the battery pack module is removed, whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value is determined; and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link. The scheme of this embodiment carries out insulating unusual reason analysis to the design principle of battery package circuit, can more accurate, more quick definite insulating unusual reason.
Example 2
Further, referring to fig. 4, it is shown that analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links includes the steps of:
s21: and after the battery management system of the battery pack is disconnected by taking the cover, determining that the current insulation resistance value of each connector to the ground is inconsistent with the corresponding initial insulation resistance measured value.
S22: and judging whether the current insulation resistance value of each connector to the ground is greater than a preset insulation resistance threshold value.
S23: if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the battery management system, and stopping checking operation;
s24: and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the battery management system.
Further, referring to fig. 5, it is shown that analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links includes the steps of:
s31: and after the main line of the battery management system is disconnected, determining that the current insulation resistance value of each connector to the ground is not consistent with the corresponding initial insulation resistance measured value.
S32: and judging whether the current insulation resistance value of each connector to the ground is greater than a preset insulation resistance threshold value.
S33: and if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the main wire harness, and stopping the troubleshooting operation.
S34: and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the main wire harness.
Further, referring to fig. 6, it is shown that analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links includes the steps of:
s41: and after the acquisition line of the battery pack is removed, determining that the current insulation resistance value of each connector to the ground is inconsistent with the corresponding initial insulation resistance measured value.
S42: and judging whether the current insulation resistance value of each connector to the ground is greater than a preset insulation resistance threshold value.
S43: and if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that the battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module, and stopping the troubleshooting operation.
S44: and if the current insulation resistance value of each connector to the ground is smaller than or equal to a preset insulation resistance threshold value, continuously executing the inspection operation after determining that the battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module.
Further, analyzing the reason for the abnormal insulation of the battery pack according to the determination result of each link includes: and if the total positive and total negative soft copper bars of the battery pack are disconnected, determining that the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value, and determining that the bottom of the battery pack module has a metal piercing phenomenon.
Further, analyzing the reason for the abnormal insulation of the battery pack according to the determination result of each link includes: and if the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value after the heating wire of the battery pack is disconnected, determining that the heating film of the battery pack module has a short circuit phenomenon.
Further, analyzing the reason for the abnormal insulation of the battery pack according to the determination result of each link includes: after the connecting copper bars of the battery pack module are removed, the insulation resistance value of each sub-module of the battery pack module to the ground is determined to be larger than a preset insulation resistance threshold value, and then the phenomenon that the periphery of each sub-module is bad is determined.
Example 3
In the present embodiment, referring to fig. 7, a battery pack insulation abnormality cause analysis device 1 is shown, which includes a first determination module 10, a second determination module 20, a third determination module 30, a fourth determination module 40, a fifth determination module 50, a sixth determination module 60, a seventh determination module 70, and an insulation abnormality cause analysis module 80.
A first determining module 10, configured to determine whether an initial insulation resistance measured value of each connector of the battery pack to ground is less than or equal to a preset insulation resistance threshold; a second determining module 20, configured to determine whether a current insulation resistance value of each connector to ground is consistent with a corresponding initial insulation resistance measured value after a battery management system of the battery pack is disconnected after a cover is taken off and the insulation resistance value of a certain connector to ground is smaller than or equal to the insulation resistance threshold value; a third determining module 30, configured to determine whether the current insulation resistance value of each connector to ground is consistent with the corresponding initial insulation resistance measured value after the main line of the battery management system is disconnected if the current insulation resistance value of each connector to ground is consistent with the corresponding initial insulation resistance measured value; a fourth judging module 40, configured to determine whether the current insulation resistance value of each connector to ground is consistent with the corresponding measured initial insulation resistance value after removing the acquisition line of the battery pack if the current insulation resistance values are consistent with the measured initial insulation resistance value; a fifth judging module 50, configured to determine whether the total positive and total negative insulation resistance values of the battery pack module of the battery pack are less than or equal to a preset insulation resistance threshold value after disconnecting the total positive and total negative soft copper bars of the battery pack; a sixth determining module 60, configured to determine whether the total positive and total negative insulation resistance values of the battery pack modules of the battery pack to ground are less than or equal to a preset insulation resistance threshold value after the heating wire of the battery pack is disconnected if the total positive and total negative insulation resistance values are less than or equal to the preset insulation resistance threshold value; a seventh judging module 70, configured to, if the insulation resistance value is less than or equal to a preset insulation resistance threshold value, determine whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value after removing the connecting copper bar of the battery pack module; and an insulation abnormality cause analysis module 80, configured to analyze a cause of the insulation abnormality of the battery pack according to the determination result of each link.
Further, the insulation abnormality cause analysis module 80 includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the battery management system of the battery pack is disconnected by taking the cover, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value; if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the battery management system, and stopping checking operation; and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the battery management system.
If the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value; if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the main wire harness, and stopping checking operation; and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the main wire harness.
If the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding measured value of the initial insulation resistance after the acquisition line of the battery pack is removed, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value; if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that the battery pack module cell of the battery pack is damaged or welding slag exists in the battery pack module, and stopping the troubleshooting operation; and if the current insulation resistance value of each connector to the ground is smaller than or equal to a preset insulation resistance threshold value, continuously executing the inspection operation after determining that the battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module.
And if the total positive and total negative soft copper bars of the battery pack are disconnected, determining that the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value, and determining that the bottom of the battery pack module has a metal piercing phenomenon.
And if the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value after the heating wire of the battery pack is disconnected, determining that the heating film of the battery pack module has a short circuit phenomenon.
After the connecting copper bars of the battery pack module are removed, the insulation resistance value of each sub-module of the battery pack module to the ground is determined to be larger than a preset insulation resistance threshold value, and then the phenomenon that the periphery of each sub-module is bad is determined.
The battery pack insulation abnormality cause analysis device 1 disclosed in this embodiment is used to execute the battery pack insulation abnormality cause analysis method according to the above embodiment by using the first determination module 10, the second determination module 20, the third determination module 30, the fourth determination module 40, the fifth determination module 50, the sixth determination module 60, the seventh determination module 70 and the insulation abnormality cause analysis module 80 in a matching manner, and the embodiments and the beneficial effects related to the above embodiment are also applicable in this embodiment, and are not described herein again.
It is to be understood that the present invention relates to a computer device, including a memory and a processor, where the memory is used for storing a computer program, and the computer program executes the method for analyzing the cause of the insulation abnormality of the battery pack according to the present invention when the computer program runs on the processor.
It is to be understood that the present invention relates to a readable storage medium storing a computer program, which, when executed on a processor, executes the method for analyzing the cause of the insulation abnormality of the battery pack according to the present invention.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart 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 invention. 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 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, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent 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 invention or a part of the technical solution that contributes to the prior art in essence can 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 smart phone, a personal computer, a server, or a network device, etc.) 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 removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method for analyzing causes of insulation abnormality of a battery pack is characterized by comprising the following steps:
determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value;
if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value, after a battery management system of the battery pack is disconnected by taking a cover, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value, after the collection line of the battery pack is removed;
if the total positive and the total negative soft copper bars of the battery pack are consistent, after the total positive and the total negative soft copper bars of the battery pack are disconnected, whether the insulation resistance values of the total positive and the total negative of a battery pack module of the battery pack to the ground are smaller than or equal to a preset insulation resistance threshold value is determined;
if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after the heating wire of the battery pack is disconnected, whether the insulation resistance values of the total positive and the total negative of the battery pack module of the battery pack to the ground are less than or equal to the preset insulation resistance threshold value is determined;
if the insulation resistance value is less than or equal to the preset insulation resistance threshold value, after a connecting copper bar of the battery pack module is removed, whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to the preset insulation resistance threshold value is determined;
and analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link.
2. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 1, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the battery management system of the battery pack is disconnected by taking the cover, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the battery management system, and stopping checking operation;
and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the battery management system.
3. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 2, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links further includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding initial insulation resistance measured value after the main line of the battery management system is disconnected, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a short circuit phenomenon exists in the main wire harness, and stopping checking operation;
and if the current insulation resistance value of each connector to the ground is less than or equal to a preset insulation resistance threshold value, continuously executing the troubleshooting operation after determining that a short circuit phenomenon exists in the main wire harness.
4. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 3, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links further includes:
if the current insulation resistance value of each connector to the ground is determined to be inconsistent with the corresponding measured value of the initial insulation resistance after the acquisition line of the battery pack is removed, determining whether the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value;
if the current insulation resistance value of each connector to the ground is larger than a preset insulation resistance threshold value, determining that a battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module, and stopping the troubleshooting operation;
and if the current insulation resistance value of each connector to the ground is smaller than or equal to a preset insulation resistance threshold value, continuously executing the inspection operation after determining that the battery pack module electric core of the battery pack is damaged or welding slag exists in the battery pack module.
5. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 4, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links further includes:
and if the total positive and total negative soft copper bars of the battery pack are disconnected, determining that the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value, and determining that the bottom of the battery pack module has a metal piercing phenomenon.
6. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 5, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links further includes:
and if the total positive and total negative insulation resistance values of the battery pack module of the battery pack are larger than a preset insulation resistance threshold value after the heating wire of the battery pack is disconnected, determining that the heating film of the battery pack module has a short circuit phenomenon.
7. The method for analyzing the cause of the insulation abnormality of the battery pack according to claim 6, wherein the analyzing the cause of the insulation abnormality of the battery pack according to the determination results of the respective links further includes:
after the connecting copper bars of the battery pack module are removed, the insulation resistance value of each sub-module of the battery pack module to the ground is determined to be larger than a preset insulation resistance threshold value, and then the phenomenon that the periphery of each sub-module is bad is determined.
8. An apparatus for analyzing causes of insulation abnormality in a battery pack, the apparatus comprising:
the first judgment module is used for determining whether the measured value of the initial insulation resistance of each connector of the battery pack to the ground is less than or equal to a preset insulation resistance threshold value;
the second judging module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after a battery management system of the battery pack is disconnected by taking a cover if the insulation resistance value of a certain connector to the ground is smaller than or equal to the insulation resistance threshold value;
the third judgment module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after the main line of the battery management system is disconnected if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
the fourth judgment module is used for determining whether the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value or not after the acquisition line of the battery pack is removed if the current insulation resistance value of each connector to the ground is consistent with the corresponding initial insulation resistance measured value;
the fifth judgment module is used for determining whether the total positive and total negative insulation resistance values of the battery pack module of the battery pack are smaller than or equal to a preset insulation resistance threshold value or not after the total positive and total negative soft copper bars of the battery pack are disconnected if the total positive and total negative soft copper bars of the battery pack are consistent;
the sixth judging module is used for determining whether the total positive and total negative insulation resistance values of the battery pack module of the battery pack are less than or equal to a preset insulation resistance threshold value or not after the heating wire of the battery pack is disconnected;
the seventh judging module is used for determining whether the insulation resistance value of each sub-module of the battery pack module to the ground is less than or equal to a preset insulation resistance threshold value or not after a connecting copper bar of the battery pack module is removed if the insulation resistance value is less than or equal to the preset insulation resistance threshold value;
and the insulation abnormity reason analysis module is used for analyzing the reason of the insulation abnormity of the battery pack according to the determination result of each link.
9. A computer device comprising a memory for storing a computer program that, when run on the processor, performs the method for analyzing causes of insulation abnormality of battery pack according to any one of claims 1 to 7, and a processor.
10. A readable storage medium storing a computer program which, when executed on a processor, executes the method for analyzing causes of insulation abnormality of a battery pack according to any one of claims 1 to 7.
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