CN115356542A - Method and device for detecting screw connection condition of high-voltage bus in battery pack - Google Patents
Method and device for detecting screw connection condition of high-voltage bus in battery pack Download PDFInfo
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- CN115356542A CN115356542A CN202210929486.1A CN202210929486A CN115356542A CN 115356542 A CN115356542 A CN 115356542A CN 202210929486 A CN202210929486 A CN 202210929486A CN 115356542 A CN115356542 A CN 115356542A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 125000003003 spiro group Chemical group 0.000 claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000005070 sampling Methods 0.000 claims description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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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
- G01R27/08—Measuring resistance by measuring both voltage and current
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
Abstract
The invention provides a method and a device for detecting the bolt connection condition of a high-voltage bus in a battery pack, wherein the method comprises the following steps: and acquiring the resistance value at the screw joint point of the high-voltage bus, and determining the screw joint condition information of the screw joint point according to the resistance value. Through this disclosure, owing to need not detect the temperature of the spiro union department of high-voltage bus Busbar to the resistance value of high-voltage bus spiro union department can accurately reflect actual spiro union situation, thereby can effectively promote the spiro union situation detection accuracy of high-voltage bus, promotes spiro union situation detection effect.
Description
Technical Field
The disclosure relates to the technical field of automobiles, in particular to a method and a device for detecting the bolt connection condition of a high-voltage bus in a battery pack.
Background
In the automobile power battery, the connection modes among the high-voltage bus bars mainly include welding, screw connection and the like. The welding reliability is high, generally can not become invalid in battery package whole life cycle, and the spiro union assembly is simple, with low costs, can dismantle, consequently, the spiro union mode also is connected by the high pressure of wide application in the battery package. However, bolt looseness can occur at the bolt joint of the high-voltage bus Busbar due to the vibration working condition of the whole vehicle running process, and thermal runaway of a battery pack can be seriously caused. Therefore, measures are usually taken to detect the connection condition at the bolt joint of the high-voltage bus Busbar, so that the thermal runaway condition of the battery pack caused by bolt loosening is prevented.
In the related art, the Temperature at the screw joint of the high-voltage bus Busbar is detected by a Negative Temperature Coefficient thermistor (NTC), when the screw joint is loosened, the Temperature is increased due to an increase in heat generation amount at the screw joint, and if the Temperature is higher than a set value, the screw joint is considered to be loosened.
In this way, due to the arrangement and sampling requirements, the NTC can only be arranged on a Flexible Circuit board (FPC for short) or other types of sampling harnesses, and cannot be arranged near the screwing point of the high-voltage bus Busbar, so that the temperature acquired by the NTC cannot accurately reflect the temperature condition at the screwing point, which results in inaccurate detection of the screwing condition of the high-voltage bus and poor detection effect of the screwing condition.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the purpose of the present disclosure is to provide a method, an apparatus, a vehicle, and a storage medium for detecting a screwing condition of a high-voltage bus in a battery pack, wherein the temperature at the screwing point of the high-voltage bus Busbar does not need to be detected, and the actual screwing condition can be accurately reflected by the resistance value at the screwing point of the high-voltage bus, so that the accuracy of detecting the screwing condition of the high-voltage bus can be effectively improved, and the detection effect of the screwing condition can be improved.
In order to achieve the above object, an embodiment of the disclosure provides a method for detecting a screwing condition of a high-voltage bus in a battery pack, including: acquiring a resistance value at a bolt joint of a high-voltage bus; and determining the screwing condition information of the screwing point according to the resistance value.
According to the method for detecting the bolt connection condition of the high-voltage bus in the battery pack, the resistance value at the bolt connection point of the high-voltage bus is obtained, the bolt connection condition information of the bolt connection point is determined according to the resistance value, the temperature at the bolt connection point of the Busbar of the high-voltage bus does not need to be detected, and the actual bolt connection condition can be accurately reflected by the resistance value at the bolt connection point of the high-voltage bus, so that the bolt connection condition detection accuracy rate of the high-voltage bus can be effectively improved, and the bolt connection condition detection effect is improved.
In order to achieve the above object, an embodiment of a second aspect of the present disclosure provides a device for detecting a screwing condition of a high-voltage bus bar in a battery pack, including: the acquisition module is used for acquiring the resistance value at the bolt joint of the high-voltage bus; and the determining module is used for determining the screwing condition information of the screwing point according to the resistance value.
The spiro union situation detection device of high voltage bus in the battery package that this disclosed second aspect embodiment provided, through the resistance value that acquires high voltage bus spiro union point department, the spiro union situation information of spiro union point is confirmed according to the resistance value, owing to need not detect the temperature of the spiro union point department of high voltage bus Busbar to the actual spiro union situation can accurately be reflected to the resistance value of high voltage bus spiro union point department, thereby can effectively promote the spiro union situation detection accuracy of high voltage bus, promotes spiro union situation detection effect.
A vehicle according to an embodiment of a third aspect of the present disclosure includes: the embodiment of the second aspect of the present disclosure provides a device for detecting a screwing condition of a high-voltage bus in a battery pack, a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements a method for detecting a screwing condition of a high-voltage bus in a battery pack as set forth in the embodiment of the first aspect of the present disclosure when executing the program.
A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a method for detecting a screwing condition of a high-voltage bus bar in a battery pack as set forth in the first aspect of the present disclosure.
A fifth aspect of the present disclosure provides a computer program product, wherein when instructions of the computer program product are executed by a processor, the method for detecting a screwing condition of a high-voltage bus bar in a battery pack as set forth in the first aspect of the present disclosure is performed.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a method for detecting a screwing condition of a high-voltage bus in a battery pack according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart illustrating a method for detecting a screwing condition of a high-voltage bus in a battery pack according to another embodiment of the disclosure;
fig. 3 is a schematic view of an installation layout of a high-voltage bus bar in a battery pack according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram of an implementation circuit in an embodiment of the disclosure;
fig. 5 is a schematic flow chart illustrating a method for detecting a screwing condition of a high-voltage bus bar in a battery pack according to another embodiment of the disclosure;
fig. 6 is a schematic structural diagram of a device for detecting a screwing condition of a high-voltage bus bar in a battery pack according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a device for detecting a screwing condition of a high-voltage bus bar in a battery pack according to another embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a vehicle in the embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic flow chart illustrating a method for detecting a screwing condition of a high-voltage bus in a battery pack according to an embodiment of the present disclosure.
It should be noted that the execution main body of the method for detecting the screwing condition of the high-voltage bus in the battery pack according to this embodiment is a device for detecting the screwing condition of the high-voltage bus in the battery pack, and the device may be implemented by software and/or hardware, and may be configured in a terminal device.
The method for detecting the screwing condition of the high-voltage bus in the battery pack in this embodiment may be applied to a terminal device, where the terminal device is a device that transmits data to or receives data from other devices via a communication facility, that is, the terminal device may be, for example, a smart phone, a portable computer, a vehicle-mounted device, and the like that can perform network communication connection, and is not limited to this.
As shown in fig. 1, the method for detecting the screwing condition of the high-voltage bus in the battery pack includes:
s101: and acquiring the resistance value at the bolt joint of the high-voltage bus.
The application scenario for the present solution can be illustrated as follows:
the method for detecting the screwing condition of the high-voltage bus in the battery pack in the embodiment of the disclosure is mainly applied to all the screwing points based on the high-voltage bus Busbar in the battery pack so as to realize high-voltage connection. If the bolt connection condition at the bolt connection point is good, the resistance value of the contact resistor is usually very small, and when the current passes through the bolt connection point in the charging and discharging processes of the battery pack, the voltage values at two sides of the bolt connection point are very small. When the bolt at the bolt joint is loosened, the contact at the bolt joint is poor, the contact resistance is increased, and the voltage on two sides of the connection point is increased.
Therefore, in the embodiment of the disclosure, the resistance value at the bolt joint of the high-voltage bus can be obtained, and the bolt joint condition at the bolt joint can be detected based on the resistance value.
When the resistance value at the bolt joint of the high-voltage bus is obtained, the resistance between the bolt joints at two ends of the high-voltage bus can be detected to obtain the resistance value, or the voltage difference between the bolt joints at two ends of the high-voltage bus can be detected, the loop current value in the current loop where the high-voltage bus is located can be detected, the resistance value is determined based on the voltage difference and the loop current value, or the resistance condition at the bolt joint of the high-voltage bus can be dynamically detected based on a Battery Management System (BMS), so that the resistance value is obtained, and the limitation is not made.
S102: and determining the screwing condition information of the screwing point according to the resistance value.
After the resistance value at the high-voltage bus bolt joint is obtained, bolt joint condition information of the bolt joint can be determined according to the resistance value.
In some embodiments, the resistance value may be compared with a pre-calibrated reference resistance value, and the screwing condition information may be determined according to a comparison condition between the detected resistance value and the reference resistance value, or the detected resistance value may be input into a detection model to determine the screwing condition information, or any other possible manner may be adopted to determine the screwing condition information of the screwing point according to the resistance value, such as a simulation modeling manner, an engineering manner, and the like, without limitation.
Here, information for describing an actual logical condition may be referred to as logical condition information, and the logical condition information may be, for example, normal screwing, abnormal screwing, loose screwing, or the like.
Optionally, in some embodiments, when the screwing condition information of the screwing point is determined according to the resistance value, a comparison result between the resistance value and a resistance threshold value may be determined, and the screwing condition information of the screwing point is determined according to the comparison result, so that the screwing condition information of the screwing point is conveniently and quickly determined, and a countermeasure is taken in time.
The resistance threshold may be a threshold for determining whether the screw joint is abnormal, the resistance threshold (R value) may be calibrated in advance, for example, 12 milliohms, the resistance threshold (R value) may be initially determined according to actual conditions of the screw joint and requirements of the battery pack itself, and whether the screw joint state is good or not may be determined by comparing the resistance value R0 with the resistance threshold (R value).
For example, the screwing state information may be determined according to a deviation amplitude between the resistance value and the resistance threshold, or the screwing state information may be determined according to a comparison result between the resistance value and the resistance threshold, or the resistance value and the resistance threshold may be input into the detection determination model to determine the screwing state information, which is not limited herein.
In this embodiment, through the resistance value of acquireing high-voltage bus spiro union department, confirm the spiro union situation information of spiro union point according to the resistance value, owing to need not detect the temperature of the spiro union point department of high-voltage bus Busbar to the resistance value of high-voltage bus spiro union point department can accurately reflect actual spiro union situation, thereby can effectively promote the spiro union situation detection accuracy of high-voltage bus, promotes spiro union situation detection effect.
Fig. 2 is a schematic flow chart of a method for detecting a screwing condition of a high-voltage bus in a battery pack according to another embodiment of the disclosure.
As shown in fig. 2, the method for detecting the screwing condition of the high-voltage bus bar in the battery pack includes:
s201: and acquiring the voltage difference value of two sides of the screw joint of the high-voltage bus.
When the voltage difference value between the two sides of the high-voltage bus screw joint is obtained, the voltage difference value between the screw joints at the two ends of the high-voltage bus can be detected to obtain the voltage difference value, or the voltage conditions at the two sides of the high-voltage bus screw joint can be dynamically detected based on a Battery Management System (BMS) to obtain the voltage difference value, which is not limited.
In the embodiment of the present disclosure, in order to enable the method for detecting the screwing condition of the high-voltage bus in the battery pack to be effectively adapted to the installation layout condition of the high-voltage bus in the battery pack, the following method may be adopted to obtain the voltage difference between two sides of the screwing point of the high-voltage bus, and first, an installation layout schematic diagram of the high-voltage bus in the battery pack is introduced, as shown in fig. 3, and fig. 3 is an installation layout schematic diagram of the high-voltage bus in the battery pack in the embodiment of the present disclosure.
The implementation manner is as shown in fig. 3, 31 is module 1, 32 is FPC1, 33 is sampling sheet 1, 34 is screw joint 1, 35 is output stage bus 1, 36 is jumper bus, 37 is screw joint 2, 38 is output stage bus 2, 39 is sampling sheet 2, 310 is FPC2, 311 is module 2.
The high-voltage connection between the module 1 and the module 2 is realized by the cross-over Busbar and the output stage Busbar1 and the output stage Busbar2 through screw connection, one side of the sampling sheet 1 is connected with the output stage Busbar1, the other side of the sampling sheet is connected with the flexible circuit board FPC1, and the voltage on the left side of a screw joint is collected; sampling piece 2 one side is connected with output stage Busbar2, and the opposite side is connected with flexible circuit board FPC2, gathers the voltage on spiro union point right side to respectively will gather voltage signal transmission to battery management system BMS through FPC1 and FPC2 and carry out the operation and obtain the difference, divide with the return circuit electric current of gathering and obtain the resistance value of spiro union point department, compare with the resistance threshold value of initial setting and can judge whether the spiro union situation of spiro union point department is good.
That is, the high voltage bus bar in the embodiments of the present disclosure may include: a first screw joint (for example, the screw joint 1 in fig. 3) and a second screw joint (screw joint 2), which are respectively arranged at two ends of the high-voltage bus (cross-over Busbar); the voltage difference value of two sides of the high-voltage bus screw joint point can be obtained by obtaining a first voltage value (which can be acquired by a sampling sheet 1) at a first screw joint point, obtaining a second voltage value (which can be acquired by a sampling sheet 2) at a second screw joint point, and determining the voltage difference value according to the first voltage value and the second voltage value, so that the voltage difference value of two sides of the high-voltage bus screw joint point can be accurately and quickly detected.
In some embodiments of the present disclosure, the first end of the high voltage bus is in threaded connection with the first output stage bus via the first threaded connection point, the first output stage bus is connected with the first flexible circuit board via the first sampling sheet, and a voltage value at the first threaded connection point output by the first flexible circuit board can be further obtained as a first voltage value, wherein the first flexible circuit board controls the first sampling sheet to collect a voltage at the first threaded connection point to obtain the first voltage value, so that the voltage value at the side end of the threaded connection point of the high voltage bus can be effectively read and detected.
In some embodiments of the disclosure, the second end of the high-voltage bus is in threaded connection with the second output-stage bus via a second threaded connection point, the second output-stage bus is connected with the second flexible circuit board via a second sampling sheet, and a voltage value at the second threaded connection point output by the second flexible circuit board can be further obtained as a second voltage value, wherein the second flexible circuit board controls the second sampling sheet to acquire the voltage at the second threaded connection point to obtain the second voltage value, so that the voltage value at the side end of the threaded connection point of the high-voltage bus can be effectively read and detected.
The voltage of the corresponding bolt joint point is collected by the first flexible circuit board and/or the second flexible circuit board, and the synchronism between the collected first voltage value and the second voltage value can be effectively guaranteed, so that the calculated voltage difference can accurately reflect the pressure difference conditions of two ends of the bolt joint of the high-voltage bus, and the accuracy of the subsequent bolt joint condition information is improved.
S202: and acquiring the loop current value of the high-voltage bus.
S203: and determining the resistance value according to the voltage difference value and the loop current value.
As shown in fig. 4, fig. 4 is a schematic diagram of an implementation circuit in the embodiment of the present disclosure, a loop current I may be obtained by detecting a current in an entire implementation circuit loop by a battery management system BMS, where 41 is a bolting point 1, and 42 is a bolting point 2, a resistance value R0 at a bolting point of a high-voltage bus may be obtained by a quotient of a voltage difference (U2-U1) at two sides of the bolting point of the high-voltage bus and the loop current I, and then a subsequent step of performing bolt connection condition information detection based on the resistance value R0 at the bolting point of the high-voltage bus is triggered and executed.
S204: and determining a comparison result between the resistance value and the resistance threshold value.
S205: and determining the screwing condition information of the screwing point according to the comparison result.
Optionally, in some embodiments, the bolt connection condition information of the bolt connection point is determined according to the comparison result, where it is determined that the bolt connection condition satisfies the detection index when the resistance value is smaller than or equal to the resistance threshold value as the comparison result, and it is determined that the bolt connection condition does not satisfy the detection index when the resistance value is greater than the resistance threshold value as the comparison result, that is, the bolt connection condition information is directly detected according to the size comparison between the resistance value and the resistance threshold value, so that the detection efficiency is higher, and a timely maintenance measure is convenient to take.
For example, by comparing the resistance value R0 with the resistance threshold value R, it can be determined whether the screwing condition is good. If R0 is less than or equal to R, then think the spiro union situation is good, if R0 is greater than R, then spiro union department is not hard up, then, can provide spiro union situation information to battery management system BMS, is adjusted the output of battery package by battery management system BMS to in time remind the driver.
That is to say, in the embodiment of the present disclosure, the screwing condition at the screwing point can be directly expressed as the magnitude of the resistance, and the resistance value is influenced very little by the environment where the battery pack is located, the battery cell and other components. Can produce return circuit current at battery package charge-discharge in-process usually, then can be through the difference of detecting spiro union department both sides voltage and the return circuit current of whole return circuit can obtain the resistance value of spiro union department, then, will detect the resistance value that obtains and compare with the resistance threshold value of initial setting, can direct reaction spiro union situation information. When the resistance value is less than or equal to the resistance threshold value, the screwing condition is determined to be good, and no measures need to be taken. When the resistance value is larger than the resistance threshold value, namely the bolt joint is determined to be failed, certain remedial measures can be taken.
As shown in fig. 5, fig. 5 is a schematic flow chart of a method for detecting a screwing condition of a high-voltage bus in a battery pack according to another embodiment of the disclosure, which includes obtaining a voltage value U1 of a screwing point 1 and a voltage value U2 of a screwing point 2 by a battery management system BMS, calculating a voltage difference U2-U1, reading a loop current I by the BMS, calculating a resistance value R0 at the screwing point of the high-voltage bus, and comparing the resistance value R0 at the screwing point of the high-voltage bus with a resistance threshold value R to determine information for detecting the screwing condition.
In this embodiment, through the resistance value of acquireing high-voltage bus spiro union department, confirm the spiro union situation information of spiro union point according to the resistance value, owing to need not detect the temperature of the spiro union point department of high-voltage bus Busbar to the resistance value of high-voltage bus spiro union point department can accurately reflect actual spiro union situation, thereby can effectively promote the spiro union situation detection accuracy of high-voltage bus, promotes spiro union situation detection effect. Through the comparison result between confirming resistance value and the resistance threshold value, according to the comparison result, confirm the spiro union situation information of spiro union point, realize directly detecting spiro union situation information according to the big or small comparison condition between resistance value and the resistance threshold value for detection efficiency is higher, is convenient for take timely maintenance measure.
Fig. 6 is a schematic structural diagram of a device for detecting a screwing condition of a high-voltage bus bar in a battery pack according to an embodiment of the present disclosure.
As shown in fig. 6, the device 60 for detecting the screwing condition of the high-voltage bus bar in the battery pack includes:
the acquisition module 601 is used for acquiring the resistance value at the screw joint of the high-voltage bus;
and the determining module 602 is configured to determine screwing condition information of the screwing point according to the resistance value.
In some embodiments of the present disclosure, as shown in fig. 7, fig. 7 is a schematic structural diagram of a device for detecting a screwing condition of a high-voltage bus bar in a battery pack according to another embodiment of the present disclosure, where the obtaining module 601 includes:
the first obtaining submodule 6011 is configured to obtain a voltage difference value between two sides of a high-voltage bus screw joint;
a second obtaining submodule 6012, configured to obtain a loop current value of the high-voltage bus;
the first determining submodule 6013 is configured to determine the resistance value according to the voltage difference value and the loop current value.
In some embodiments of the present disclosure, a high voltage bus bar includes: the first screw joint and the second screw joint are respectively arranged at two ends of the high-voltage bus; the first obtaining submodule 6011 is specifically configured to:
acquiring a first voltage value at a first bolt joint;
acquiring a second voltage value at a second bolt joint;
and determining a voltage difference value according to the first voltage value and the second voltage value.
In some embodiments of the present disclosure, the first end of the high voltage bus bar is screwed with the first output stage bus bar via a first screw joint, and the first output stage bus bar and the first flexible circuit board are connected via a first sampling sheet;
the first obtaining submodule 6011 is further configured to:
and acquiring a voltage value at a first screw joint point output by the first flexible circuit board as a first voltage value, wherein the first flexible circuit board controls the first sampling sheet to acquire the voltage at the first screw joint point to obtain the first voltage value.
In some embodiments of the present disclosure, the second end of the high voltage bus bar is screwed with the second output stage bus bar via a second screwing point, and the second output stage bus bar and the second flexible circuit board are connected via a second sampling sheet;
the first obtaining submodule 6011 is further configured to:
and acquiring a voltage value at a second screw joint point output by the second flexible circuit board as a second voltage value, wherein the second flexible circuit board controls the second sampling sheet to acquire the voltage at the second screw joint point to obtain the second voltage value.
In some embodiments of the present disclosure, the root determination module 602 includes:
the second determining submodule 6021 is configured to determine a comparison result between the resistance value and the resistance threshold;
and a third determining submodule 6022 configured to determine screwing condition information of the screwing point according to the comparison result.
In some embodiments of the present disclosure, the third determination submodule 6022 is specifically configured to:
if the comparison result is that the resistance value is smaller than or equal to the resistance threshold value, determining that the screwing condition information is that the screwing condition meets the detection index;
and if the comparison result is that the resistance value is larger than the resistance threshold value, determining that the screwing condition information is that the screwing condition does not meet the detection index.
Corresponding to the method for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of fig. 1 to 5, the present disclosure also provides a device for detecting the screwing condition of the high-voltage bus in the battery pack, and since the device for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of the present disclosure corresponds to the method for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of fig. 1 to 5, the embodiment of the method for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of the present disclosure is also applicable to the device for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of the present disclosure, and is not described in detail in the embodiments of the present disclosure.
In this embodiment, through the resistance value of acquireing high-voltage bus spiro union department, confirm the spiro union situation information of spiro union point according to the resistance value, owing to need not detect the temperature of the spiro union point department of high-voltage bus Busbar to the resistance value of high-voltage bus spiro union point department can accurately reflect actual spiro union situation, thereby can effectively promote the spiro union situation detection accuracy of high-voltage bus, promotes spiro union situation detection effect.
In order to implement the above embodiment, the present disclosure further provides a vehicle 80, as shown in fig. 8, where fig. 8 is a schematic structural diagram of the vehicle in the embodiment of the present disclosure, and includes: the device 60 for detecting the screwing condition of the high-voltage bus in the battery pack, the processor 801, the memory 802 and the computer program stored on the memory and capable of running on the processor realize the method for detecting the screwing condition of the high-voltage bus in the battery pack as proposed in the previous embodiment of the disclosure when the processor executes the program.
Corresponding to the method for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of fig. 1 to 5, the present disclosure also provides a vehicle, and since the vehicle provided in the embodiments of the present disclosure corresponds to the method for detecting the screwing condition of the high-voltage bus in the battery pack provided in the embodiments of fig. 1 to 5, the embodiments of the method for detecting the screwing condition of the high-voltage bus in the battery pack are also applicable to the vehicle provided in the embodiments of the present disclosure, and will not be described in detail in the embodiments of the present disclosure.
In order to achieve the above-mentioned embodiments, the present disclosure also proposes a non-transitory computer-readable storage medium on which a computer program is stored, which when executed by a processor, implements the bolt joint condition detection apparatus method of the high voltage bus bar in the battery pack as proposed in the foregoing embodiments of the present disclosure.
In order to achieve the above embodiments, the present disclosure further provides a computer program product, which when executed by an instruction processor in the computer program product, performs the method for detecting the screwing condition of the high-voltage bus bar in the battery pack as provided in the foregoing embodiments of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, the meaning of "a plurality" is two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following technologies, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (16)
1. A method for detecting the screwing condition of a high-voltage bus in a battery pack is characterized by comprising the following steps:
acquiring a resistance value at a bolt joint of a high-voltage bus;
and determining the screwing condition information of the screwing point according to the resistance value.
2. The method of claim 1, wherein the obtaining the resistance value at the high voltage bus bar bolt connection point comprises:
acquiring a voltage difference value of two sides of a high-voltage bus screw joint;
acquiring a loop current value of the high-voltage bus;
and determining the resistance value according to the voltage difference value and the loop current value.
3. The method of claim 2, wherein the high voltage bus bar comprises: the first screw joint and the second screw joint are respectively arranged at two ends of the high-voltage bus; wherein, obtain the voltage difference value of high voltage bus spiro union point both sides, include:
acquiring a first voltage value at the first bolt joint;
acquiring a second voltage value at the second bolt joint;
and determining the voltage difference value according to the first voltage value and the second voltage value.
4. The method of claim 3, wherein the first end of the high voltage bus bar is threadably engaged with a first output stage bus bar via the first threaded connection, the first output stage bus bar and the first flexible circuit board being connected via a first sampling tab;
wherein the obtaining a first voltage value at the first bolt joint comprises:
and acquiring a voltage value at a first bolt joint point output by the first flexible circuit board as the first voltage value, wherein the first flexible circuit board controls the first sampling sheet to acquire the voltage at the first bolt joint point to obtain the first voltage value.
5. The method of claim 3, wherein the second end of the high voltage bus bar is threadably engaged with a second output stage bus bar via the second threaded connection, the second output stage bus bar and a second flexible circuit board being connected via a second sampling tab;
wherein the obtaining a second voltage value at the second bolt joint comprises:
and acquiring a voltage value at a second screw joint point output by the second flexible circuit board as the second voltage value, wherein the second flexible circuit board controls the second sampling sheet to acquire the voltage at the second screw joint point to obtain the second voltage value.
6. The method of any one of claims 1-5, wherein said determining the bolting condition information for the bolted joint based on the resistance value comprises:
determining a comparison result between the resistance value and a resistance threshold value;
and determining the screwing condition information of the screwing point according to the comparison result.
7. The method of claim 6, wherein determining the bolting condition information of the bolting point according to the comparison result comprises:
if the resistance value is smaller than or equal to the resistance threshold value according to the comparison result, determining that the screwing condition information is that the screwing condition meets the detection index;
and if the resistance value is larger than the resistance threshold value according to the comparison result, determining that the screwing condition information is that the screwing condition does not meet the detection index.
8. The utility model provides a spiro union situation detection device of high voltage bus in battery package which characterized in that includes:
the acquisition module is used for acquiring the resistance value at the bolt joint of the high-voltage bus;
and the determining module is used for determining the screwing condition information of the screwing point according to the resistance value.
9. The apparatus of claim 8, wherein the acquisition module comprises:
the first obtaining submodule is used for obtaining a voltage difference value of two sides of a high-voltage bus screw joint;
the second obtaining submodule is used for obtaining the loop current value of the high-voltage bus;
and the first determining submodule is used for determining the resistance value according to the voltage difference value and the loop current value.
10. The apparatus of claim 9, wherein the high voltage bus bar comprises: the first screw joint and the second screw joint are respectively arranged at two ends of the high-voltage bus; the first obtaining submodule is specifically configured to:
acquiring a first voltage value at the first bolt joint;
acquiring a second voltage value at the second bolt joint;
and determining the voltage difference value according to the first voltage value and the second voltage value.
11. The apparatus of claim 10, wherein the first end of the high voltage bus bar is threadably connected to a first output stage bus bar via the first threaded connection, the first output stage bus bar and the first flexible circuit board being connected via a first sampling tab;
wherein the first obtaining submodule is further configured to:
and acquiring a voltage value at a first bolt joint point output by the first flexible circuit board as the first voltage value, wherein the first flexible circuit board controls the first sampling sheet to acquire the voltage at the first bolt joint point to obtain the first voltage value.
12. The apparatus of claim 10, wherein the second end of the high voltage bus bar is threadably connected to a second output stage bus bar via the second threaded connection, the second output stage bus bar and a second flexible circuit board being connected via a second sampling tab;
wherein the first obtaining sub-module is further configured to:
and acquiring a voltage value at a second bolt joint point output by the second flexible circuit board as the second voltage value, wherein the second flexible circuit board controls the second sampling sheet to acquire the voltage at the second bolt joint point to obtain the second voltage value.
13. The apparatus of any of claims 8-12, wherein the determining module comprises:
the second determining submodule is used for determining a comparison result between the resistance value and the resistance threshold value;
and the third determining submodule is used for determining the screwing condition information of the screwing point according to the comparison result.
14. The apparatus of claim 13, wherein the third determining submodule is specifically configured to:
if the comparison result is that the resistance value is smaller than or equal to the resistance threshold value, determining that the screwing condition information is that the screwing condition meets the detection index;
and if the resistance value is larger than the resistance threshold value according to the comparison result, determining that the screwing condition information is that the screwing condition does not meet the detection index.
15. A vehicle characterized by comprising the screw-on condition detection device of the high-voltage bus bar in the battery pack according to any one of claims 8 to 14.
16. The vehicle of claim 15, further comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
the steps of carrying out the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210929486.1A CN115356542A (en) | 2022-08-03 | 2022-08-03 | Method and device for detecting screw connection condition of high-voltage bus in battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210929486.1A CN115356542A (en) | 2022-08-03 | 2022-08-03 | Method and device for detecting screw connection condition of high-voltage bus in battery pack |
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| CN115356542A true CN115356542A (en) | 2022-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115648949A (en) * | 2022-12-28 | 2023-01-31 | 河北长征汽车制造有限公司 | Method for detecting DCIR (direct current infrared) of battery pack on line and electric automobile |
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2022
- 2022-08-03 CN CN202210929486.1A patent/CN115356542A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115648949A (en) * | 2022-12-28 | 2023-01-31 | 河北长征汽车制造有限公司 | Method for detecting DCIR (direct current infrared) of battery pack on line and electric automobile |
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