CN116224142A - Method and device for detecting abnormal welding of battery system - Google Patents
Method and device for detecting abnormal welding of battery system Download PDFInfo
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- CN116224142A CN116224142A CN202310144404.7A CN202310144404A CN116224142A CN 116224142 A CN116224142 A CN 116224142A CN 202310144404 A CN202310144404 A CN 202310144404A CN 116224142 A CN116224142 A CN 116224142A
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a method and a device for detecting abnormal welding of a battery system, and relates to the technical field of battery detection. The method comprises the following steps: if all the electric cores and the aluminum rows in the battery system have no first abnormality, checking welding positions of all the electric cores and the aluminum rows in the battery system; if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, acquiring a first parameter of the battery system, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not; if the first parameter of the battery system is not in the preset range, the battery system is judged to have abnormal welding, so that the detection of the welding position of the battery core and the aluminum row can be rapidly realized under the condition that the welding position of the battery core and the aluminum row is not damaged when the battery system is abnormal in the use process.
Description
Technical Field
The invention relates to the technical field of battery detection, in particular to a method and a device for detecting abnormal welding of a battery system.
Background
In the new energy field, the battery system may be applied to electric vehicles and energy storage devices. The battery system comprises a box body and at least one battery module arranged in the box body, wherein the battery module comprises a plurality of battery modules, each battery module comprises a plurality of battery cells, and the battery cells are connected in series-parallel through a plurality of aluminum bars. The battery core and the aluminum row are required to be electrically connected through welding, and the welding quality directly determines the electrical property and the safety property of the battery system. When the battery system is abnormal in the use process, the welding position of the battery core and the aluminum row needs to be detected.
In the prior art, a welding position of a battery cell and an aluminum row is detected, destructive slicing is usually needed to be carried out on the welding position, metallographic testing is carried out, the penetration, the width and the air holes of the welding position are measured, and if the penetration and/or the width and/or the air holes are not in the range, the welding abnormality of a battery system is judged.
However, in the prior art, the welding position of the battery cell and the aluminum row is detected, a metallographic test is required, and the problem of damaging the welding position of the battery cell and the aluminum row exists.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting abnormal welding of a battery system, which are used for solving the problem that a welding position of a battery core and an aluminum row is damaged when a metallographic test is required to be carried out in the detection of the welding position of the battery core and the aluminum row in the prior art.
In one aspect, an embodiment of the present invention provides a method for detecting abnormal welding of a battery system, including the steps of:
if all the electric cores and the aluminum rows in the battery system have no first abnormality, checking welding positions of all the electric cores and the aluminum rows in the battery system;
if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, acquiring a first parameter of the battery system, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not;
and if the first parameter of the battery system is not in the preset range, judging that the battery system has abnormal welding.
Optionally, the battery system includes at least one battery module, the battery module includes a frame and a plurality of battery modules disposed in the frame, the battery modules include a plurality of battery cells and a plurality of aluminum bars, and the plurality of battery cells are configured to be connected in series-parallel through the plurality of aluminum bars.
Optionally, the method further comprises:
and if the battery cell and/or the aluminum busbar in the battery system have a first abnormality, judging that the battery system has a welding abnormality.
Optionally, the first anomaly comprises an appearance impairment.
Optionally, the method further comprises:
if a second abnormality exists at the welding position of the battery cell and the aluminum row in the battery system, judging that the battery system has the welding abnormality; wherein the second anomaly is a cold joint or a missing joint.
The first parameter comprises insulation current corresponding to the frame of the aluminum row, and the insulation current corresponding range of the aluminum row corresponding to the frame is an insulation current preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within the preset range, the method further includes,
and if the insulation current of at least one aluminum row corresponding to the frame is not within the insulation current preset range, judging that the battery system has abnormal welding.
Optionally, the first parameter further includes an ac internal resistance corresponding to a welding position of the two poles of the electric core, and a range corresponding to the ac internal resistance corresponding to the welding position of the two poles of the electric core is an ac internal resistance preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within the preset range, the method further includes,
and if the alternating current internal resistance corresponding to the welding position of the two poles of at least one battery cell is not within the alternating current internal resistance preset range, judging that the battery system has abnormal welding.
Optionally, the first parameter further includes a temperature of the battery cell when the battery system is in use, and a range corresponding to the temperature of the battery cell when the battery system is in use is a preset range of battery cell temperature;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within the preset range, the method further includes,
and if the temperature of at least one battery cell when the battery system is used is not within the preset range of the battery cell temperature, judging that the battery system has abnormal welding.
Optionally, the first parameter further includes a temperature of the aluminum row when the battery system is in use, and a range corresponding to the temperature of the aluminum row when the battery system is in use is an aluminum row temperature preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within the preset range, the method further includes,
and if the temperature of at least one aluminum row when the battery system is used is not within the preset temperature range of the aluminum row, judging that the battery system has abnormal welding.
In another aspect, an embodiment of the present invention provides a device for detecting abnormal welding of a battery system, including:
the inspection module is used for inspecting the welding positions of all the electric cores and the aluminum rows in the battery system if all the electric cores and the aluminum rows in the battery system have no first abnormality;
the acquisition module is used for acquiring a first parameter of the battery system if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not;
and the first judging module is used for judging that the battery system has abnormal welding if the first parameter of the battery system is not in the corresponding range.
The embodiment of the invention provides a method and a device for detecting abnormal welding of a battery system, wherein the method comprises the following steps: if all the electric cores and the aluminum rows in the battery system have no first abnormality, checking welding positions of all the electric cores and the aluminum rows in the battery system; if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, acquiring a first parameter of the battery system, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not; if the first parameter of the battery system is not in the preset range, the battery system is judged to have abnormal welding, so that the detection of the welding position of the battery core and the aluminum row can be rapidly realized under the condition that the welding position of the battery core and the aluminum row is not damaged when the battery system is abnormal in the use process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a flowchart of a method for detecting abnormal welding of a battery system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a battery cell and an aluminum row of a battery system according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the cell of FIG. 2;
fig. 4 is a schematic diagram of a device for detecting abnormal welding of a battery system according to an embodiment of the present invention.
Reference numerals illustrate:
10-an electric core;
101-square aluminum shell;
102-pole;
20-aluminum bars;
401-an inspection module;
402-an acquisition module;
403-first decision module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean 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 invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the prior art, the welding position of the battery cell and the aluminum row is detected, a metallographic test is needed, and the problem that the welding position of the battery cell and the aluminum row is damaged exists.
In order to solve the above problems, an embodiment of the present invention provides a method and an apparatus for detecting abnormal welding of a battery system, where if all cells and aluminum rows in the battery system have no first abnormality, the welding positions of all cells and aluminum rows in the battery system are inspected; if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, acquiring a first parameter of the battery system, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not; if the first parameter of the battery system is not in the preset range, the battery system is judged to have abnormal welding, so that the detection of the welding position of the battery core and the aluminum row can be rapidly realized under the condition that the welding position of the battery core and the aluminum row is not damaged when the battery system is abnormal in the use process.
The method and the device for detecting abnormal welding of the battery system provided by the embodiment of the invention are described in detail below with reference to specific embodiments.
Fig. 1 is a flowchart of a method for detecting abnormal welding of a battery system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a battery cell and aluminum rows of a battery system, only one battery cell and two aluminum rows being shown in FIG. 2; fig. 3 is a schematic diagram of the cell in fig. 2.
As shown in fig. 1 to 3, an embodiment of the present invention provides a method for detecting abnormal welding of a battery system, including the steps of:
s100, if all the battery cells 10 and the aluminum rows 20 in the battery system have no first abnormality, checking welding positions of all the battery cells 10 and the aluminum rows 20 in the battery system.
Specifically, the battery system includes at least one battery module including a frame and a plurality of battery modules disposed in the frame, the battery modules including a plurality of battery cells 10 and a plurality of aluminum rows 20, the plurality of battery cells 10 being configured to be connected in series-parallel through the plurality of aluminum rows 20.
The battery core 10 is provided with a square aluminum shell 101 and a pole 102, a layer of blue film is coated on the outer side of the square aluminum shell 101, the blue film is used for playing an insulating role, and the pole 102 is electrically connected with the aluminum row 20 through welding.
The first anomaly includes an appearance impairment. The appearance damage can be pits, bumps or blue film damage. The outer side of the aluminum row 20 has no blue film.
Checking the welding positions of all the battery cells 10 and the aluminum rows 20 in the battery system specifically comprises checking whether the welding positions of all the battery cells 10 and the aluminum rows 20 in the battery system have second abnormality.
The second anomaly may be a cold joint or a cold joint. Checking whether a second abnormality exists at the welding position of the battery cell 10 and the aluminum row 20, specifically: the insulating metal sheet is placed between the battery cell 10 and the aluminum row 20, the aluminum row 20 is pried by the insulating metal sheet, if the insulating metal sheet prizes the aluminum row 20, the welding position of the battery cell 10 and the aluminum row 20 has a second abnormality, and if the insulating metal sheet does not prize the aluminum row 20, the welding position of the battery cell 10 and the aluminum row 20 has no second abnormality.
Alternatively, if the battery cell 10 and/or the aluminum row 20 in the battery system has the first abnormality, it is determined that the battery system has the welding abnormality.
Specifically, when the first abnormality occurs in the battery cell 10, the battery cell 10 may have a pit, may collide with the pit, or may have a blue film damaged. When the aluminum row 20 has the first abnormality, the aluminum row 20 may have pits or bumps.
If the battery cell 10 in the battery system has the first abnormality, judging that the battery system has the welding abnormality; if the aluminum row 20 in the battery system has the first abnormality, judging that the battery system has welding abnormality; if the first abnormality exists in both the battery cell 10 and the aluminum row 20 in the battery system, it is determined that the welding abnormality exists in the battery system.
Alternatively, if there is a second abnormality in the welded portion of the battery cell 10 and the aluminum row 20 in the battery system, it is determined that there is a welding abnormality in the battery system. Specifically, if there is a second abnormality in at least one of the welded portions of all the battery cells 10 and the aluminum row 20 in the battery system, it is determined that there is a welding abnormality in the battery system.
And S200, if the welding positions of all the battery cells 10 and the aluminum row 20 in the battery system are not abnormal, acquiring a first parameter of the battery system.
The first parameter is used to measure whether the welding position between the battery cell 10 and the aluminum row 20 is qualified. The first parameter is a parameter obtained without damaging the battery system, that is, without damaging the welded portion of the battery cell 10 and the aluminum row 20.
S300, judging whether the battery system has welding abnormality according to whether the first parameter of the battery system is in a corresponding range.
And if the first parameter of the battery system is not in the corresponding range, judging that the welding abnormality exists in the battery system.
In this embodiment, the battery system has abnormal welding, that is, the battery cells 10 and the aluminum bars 20 in the battery system have abnormal welding.
According to the method for detecting abnormal welding of the battery system, provided by the embodiment of the invention, when the battery system is abnormal in the use process, the welding position of the battery cell 10 and the aluminum row 20 can be rapidly detected without damaging the welding position of the battery cell 10 and the aluminum row 20.
Optionally, the first parameter includes an insulation current corresponding to the aluminum busbar 20 and the frame, and a range corresponding to the insulation current corresponding to the aluminum busbar 20 and the frame is an insulation current preset range.
In the battery system, a layer of blue film is coated on the outer side of the square aluminum shell 101 of the battery cell 10, the battery cell 10 is in contact with the frame, and the aluminum row 20 is not in contact with the frame.
The insulation current corresponding to the aluminum busbar 20 and the frame can be obtained by the insulation resistance meter. Specifically, one test pen of the insulation resistance meter is in contact with the aluminum bar 20, and the other test pen is in contact with the frame, and an insulation current can be obtained.
The insulation current preset range can be obtained by counting the insulation currents of all the aluminum bars 20 corresponding to the frame when the battery system is normal. The preset range of the insulation current may be 0-1 mA.
If the first parameter of the battery system is not within the preset range, the step of judging that the welding abnormality of the battery system exists further comprises the following steps: if the insulation current of at least one aluminum row 20 corresponding to the frame is not within the insulation current preset range, it is determined that the welding abnormality of the battery system exists. Specifically, if the insulation current corresponding to the frame of at least one aluminum row 20 in the battery system is not within the insulation current preset range, it is determined that the welding abnormality of the battery system exists.
Optionally, the first parameter further includes an ac internal resistance corresponding to a welding position of the two poles 102 of the battery cell 10, and a range corresponding to the ac internal resistance corresponding to the welding position of the two poles 102 of the battery cell 10 is an ac internal resistance preset range.
The ac internal resistance corresponding to the welded position of the two poles 102 of the battery cell 10 can be obtained by the internal resistance tester. Specifically, one test pen of the internal resistance tester is in contact with the welding position of one pole 102, and the other test pen is in contact with the welding position of one pole 102, so that the alternating current internal resistance can be obtained.
The preset ac internal resistance range may be obtained by counting ac internal resistances corresponding to the welded portions of the two poles 102 of all the battery cells 10 when the battery system is normal.
If the first parameter of the battery system is not within the preset range, the step of judging that the welding abnormality of the battery system exists further comprises the following steps: if the ac internal resistance corresponding to the welding position of the two poles 102 of the at least one battery cell 10 is not within the ac internal resistance preset range, it is determined that the welding abnormality exists in the battery system. Specifically, if the ac internal resistance corresponding to the welded portion of the two poles 102 of at least one cell 10 in the battery system is not within the ac internal resistance preset range, it is determined that the battery system has a welding abnormality.
Optionally, the first parameter further includes a temperature of the battery cell 10 when the battery system is in use, and a range corresponding to the temperature of the battery cell 10 when the battery system is in use is a preset range of the battery cell temperature.
The battery system comprises a control management unit, and the control management unit can collect the temperature of each battery cell 10 in the battery system when the battery system is used.
The preset range of cell temperature can be obtained by counting the temperatures of all the cells 10 when the battery system is in use when the battery system is normal.
If the first parameter of the battery system is not within the preset range, the step of judging that the welding abnormality of the battery system exists further comprises the following steps: if the temperature of at least one battery cell 10 in the use of the battery system is not within the preset range of the battery cell temperature, the battery system is judged to have abnormal welding. Specifically, if the temperature of at least one cell 10 in the battery system is not within the preset cell temperature range, it is determined that the battery system has abnormal welding.
Optionally, the first parameter further includes a temperature of the aluminum row 20 when the battery system is in use, and the range corresponding to the temperature of the aluminum row 20 when the battery system is in use is an aluminum row temperature preset range.
The control and management unit may also collect the temperature of each aluminum row 20 in the battery system when the battery system is in use.
The preset range of the aluminum busbar temperature can be obtained by counting the temperatures of all the aluminum busbars 20 when the battery system is in use when the battery system is normal.
If the first parameter of the battery system is not within the preset range, the step of judging that the welding abnormality of the battery system exists further comprises the following steps: if the temperature of at least one aluminum row 20 when the battery system is in use is not within the preset range of the temperature of the aluminum row, it is determined that the battery system has abnormal welding. Specifically, if the temperature of at least one aluminum row 20 in the battery system is not within the preset aluminum row temperature range, it is determined that the battery system has a welding abnormality.
Optionally, the method for detecting abnormal welding of a battery system provided by the embodiment of the invention further includes: if the first parameter of the battery system is in the corresponding range, the battery system is judged to be normal.
Specifically, if the insulation currents corresponding to the frames and all aluminum rows 20 in the battery system are within the insulation current preset range, the ac internal resistances corresponding to the welded parts of the two poles 102 of all the battery cells 10 are within the ac internal resistance preset range, the temperatures of all the battery cells 10 when the battery system is used are within the battery cell temperature preset range, and the temperatures of all the aluminum rows 20 when the battery system is used are within the aluminum row temperature preset range, the battery system is judged to be welded normally.
In this embodiment, the battery system is welded normally, that is, the battery cells 10 and the aluminum bars 20 in the battery system are welded normally.
Fig. 4 is a schematic diagram of a device for detecting abnormal welding of a battery system according to an embodiment of the present invention.
As shown in fig. 4, an embodiment of the present invention further provides a device for detecting abnormal welding of a battery system, including: an inspection module 401, an acquisition module 402, and a first decision module 403.
The inspection module 401 is configured to inspect the welding positions of all the cells and the aluminum row in the battery system if all the cells 10 and the aluminum row 20 in the battery system have no first abnormality. Since the inspection module 401 and the implementation principle of step S100 are similar, they will not be described further herein.
The obtaining module 402 is configured to obtain a first parameter of the battery system if there is no second abnormality at the welding positions of all the battery cells 10 and the aluminum row 20 in the battery system, where the first parameter is used to measure whether the welding positions of the battery cells and the aluminum row are qualified. Since the implementation principle of the acquisition module 402 and the step S200 is similar, it will not be described further here.
The first determining module 403 is configured to determine that the welding abnormality exists in the battery system if the first parameter of the battery system is not within the corresponding range. Since the implementation principle of the first decision module 403 and the step S300 is similar, it will not be described further here.
Optionally, the first determining module 403 is further configured to determine that there is a welding abnormality in the battery system if an insulation current corresponding to the at least one aluminum row 20 and the frame is not within an insulation current preset range. Specifically, if the insulation current corresponding to the frame of at least one aluminum row 20 in the battery system is not within the insulation current preset range, it is determined that the welding abnormality of the battery system exists.
Optionally, the first determining module 403 is further configured to determine that the battery system has a welding abnormality if the ac internal resistance corresponding to the welding position of the two poles 102 of the at least one battery cell 10 is not within the ac internal resistance preset range. Specifically, if the ac internal resistance corresponding to the welded portion of the two poles 102 of at least one cell 10 in the battery system is not within the ac internal resistance preset range, it is determined that the battery system has a welding abnormality.
Optionally, the first determining module 403 is further configured to determine that there is a welding abnormality in the battery system if the temperature of at least one battery cell 10 in use of the battery system is not within the preset range of the battery cell temperature. Specifically, if the temperature of at least one cell 10 in the battery system is not within the preset cell temperature range, it is determined that the battery system has abnormal welding.
Optionally, the first determining module 403 is further configured to determine that there is a welding abnormality in the battery system if the temperature of at least one aluminum row 20 when the battery system is in use is not within the preset range of aluminum row temperatures. Specifically, if the temperature of at least one aluminum row 20 in the battery system is not within the preset aluminum row temperature range, it is determined that the battery system has a welding abnormality.
Optionally, the battery system further comprises a second determination module, configured to determine that the battery system is normal if the first parameter of the battery system is within the corresponding range.
Optionally, a third determining module is further included for determining that there is a welding abnormality in the battery system if there is a first abnormality in the battery cell 10 and/or the aluminum row 20 in the battery system.
Optionally, the battery system further comprises a fourth judging module, and if the welding position of the battery cell 10 and the aluminum row 20 in the battery system is abnormal, the welding abnormality of the battery system is judged.
The embodiment of the invention also provides electronic equipment which comprises a memory and a processor. The memory stores computer-executable instructions, and the processor is communicatively coupled to the memory and executable by the memory to store the computer-executable instructions to implement the battery system abnormal welding detection method as mentioned above.
The embodiment of the invention also provides a computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, and when the computer executable instructions are executed by a processor, the computer readable storage medium is used for realizing the battery system abnormal welding detection method in the embodiment.
The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or processor to perform some steps of the methods of the various embodiments of the present application.
It should be appreciated that the processor may be a central processing unit (Central Processing Unit, CPU for short), other general purpose processors, digital signal processor (Digital Signal Processor, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution. The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.
The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A method for detecting abnormal welding of a battery system, comprising the steps of:
if all the electric cores and the aluminum rows in the battery system have no first abnormality, checking welding positions of all the electric cores and the aluminum rows in the battery system;
if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, acquiring a first parameter of the battery system, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not;
and if the first parameter of the battery system is not in the corresponding range, judging that the battery system has abnormal welding.
2. The method for detecting abnormal welding of a battery system according to claim 1, wherein the battery system comprises at least one battery module, the battery module comprises a frame and a plurality of battery modules arranged in the frame, the battery modules comprise a plurality of electric cores and a plurality of aluminum bars, and the electric cores are connected in series and parallel through the plurality of aluminum bars.
3. The battery system abnormal welding detection method according to claim 2, further comprising:
and if the battery cell and/or the aluminum busbar in the battery system have a first abnormality, judging that the battery system has a welding abnormality.
4. The battery system abnormal welding detection method according to claim 3, wherein the first abnormality comprises an appearance damage.
5. The battery system abnormal welding detection method according to claim 2, further comprising:
if a second abnormality exists at the welding position of the battery cell and the aluminum row in the battery system, judging that the battery system has the welding abnormality; wherein the second anomaly is a cold joint or a missing joint.
6. The battery system abnormal welding detection method according to any one of claims 2 to 5, wherein the first parameter includes an insulation current of the aluminum row corresponding to the frame, and a range of the insulation current of the aluminum row corresponding to the frame is an insulation current preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within a preset range, the method further includes,
and if the insulation current of at least one aluminum row corresponding to the frame is not within the insulation current preset range, judging that the battery system has abnormal welding.
7. The method for detecting abnormal welding of a battery system according to claim 6, wherein the first parameter further comprises an ac internal resistance corresponding to a welding position of two poles of the battery cell, and a range corresponding to the ac internal resistance corresponding to the welding position of two poles of the battery cell is an ac internal resistance preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within a preset range, the method further includes,
and if the alternating current internal resistance corresponding to the welding position of the two poles of at least one battery cell is not within the alternating current internal resistance preset range, judging that the battery system has abnormal welding.
8. The method for detecting abnormal welding of a battery system according to claim 7, wherein the first parameter further comprises a temperature of the battery cell when the battery system is in use, and a range corresponding to the temperature of the battery cell when the battery system is in use is a preset range of a battery cell temperature;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within a preset range, the method further includes,
and if the temperature of at least one battery cell when the battery system is used is not within the preset range of the battery cell temperature, judging that the battery system has abnormal welding.
9. The method for detecting abnormal welding of a battery system according to claim 7, wherein the first parameter further comprises a temperature of the aluminum row when the battery system is in use, and a range corresponding to the temperature of the aluminum row when the battery system is in use is an aluminum row temperature preset range;
in the step of determining that the battery system has a welding abnormality if the first parameter of the battery system is not within a preset range, the method further includes,
and if the temperature of at least one aluminum row when the battery system is used is not within the preset temperature range of the aluminum row, judging that the battery system has abnormal welding.
10. An abnormal welding detection device for a battery system, comprising:
the inspection module is used for inspecting the welding positions of all the electric cores and the aluminum rows in the battery system if all the electric cores and the aluminum rows in the battery system have no first abnormality;
the acquisition module is used for acquiring a first parameter of the battery system if the welding positions of all the battery cells and the aluminum row in the battery system are not abnormal, wherein the first parameter is used for measuring whether the welding positions of the battery cells and the aluminum row are qualified or not;
and the first judging module is used for judging that the battery system has abnormal welding if the first parameter of the battery system is not in the corresponding range.
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