CN112816139A - Liquid leakage detection method and device - Google Patents
Liquid leakage detection method and device Download PDFInfo
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- CN112816139A CN112816139A CN202011589312.2A CN202011589312A CN112816139A CN 112816139 A CN112816139 A CN 112816139A CN 202011589312 A CN202011589312 A CN 202011589312A CN 112816139 A CN112816139 A CN 112816139A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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Abstract
The embodiment of the invention provides a liquid leakage detection method and device. In the technical scheme provided by the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of new energy power batteries, in particular to a leakage detection method and device.
[ background of the invention ]
At present, the detection technology for detecting the leakage of the battery cell is mainly based on the battery cell layer, for example: can be detected by a Volatile Organic Compound (VOC) detector. The VOC detector can not detect out the electric core weeping condition from the battery module aspect, nevertheless in the production process of battery module, still has the factor that leads to electric core weeping, detects whether weeping of electric core in the production process of battery module, and prior art still lacks effectual detection method, and the battery of making like this has the potential safety hazard.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method and an apparatus for detecting liquid leakage, which can detect a liquid leakage condition of a battery cell in a production process of a battery module, and ensure the safety of a battery.
In one aspect, an embodiment of the present invention provides a method for detecting liquid leakage, where the method includes:
carrying out charge and discharge tests on the battery module;
carrying out vacuum detection on the battery module;
and (4) carrying out leakage detection according to the appearance of the battery module.
Optionally, carry out the charge-discharge test to battery module, include:
charging the battery module to a state of charge within a first specified range;
standing the charged battery module for a first time;
and discharging the battery module to the state of charge in the second specified range.
Optionally, carry out the charge-discharge test to battery module, include:
and carrying out the cycle charge and discharge test of the battery module for a specified number of times.
Optionally, the vacuum detection is performed on the charged battery module, and the vacuum detection includes:
the battery module is placed in a vacuum box in an inverted mode;
vacuumizing the vacuum box according to the specified vacuum degree;
the vacuum box was left standing for a second length of time.
Optionally, according to battery module outward appearance, carry out the weeping and detect, include:
observing the appearance of the battery module, and judging whether liquid flows out;
if judge that there is the liquid outflow, the electric core weeping of battery module.
Optionally, the method further comprises:
if judge that there is not liquid outflow, the electric core of battery module does not have the weeping.
Alternatively, the first specified range includes greater than 90% and less than or equal to 100%, and the second specified range includes greater than or equal to 0% and less than 5%.
Alternatively, the range of the specified number of times includes 1 to 5 times.
Optionally, the specified vacuum range includes less than or equal to-85 kPa; the second period of time ranges from 10 minutes to 30 minutes.
In another aspect, an embodiment of the present invention provides a liquid leakage detection apparatus, including:
the testing unit is used for carrying out charge and discharge testing on the battery module;
the first detection unit is used for carrying out vacuum detection on the battery module;
and the second detection unit is used for detecting leakage according to the appearance of the battery module.
On the other hand, the embodiment of the invention provides a storage medium, which comprises a stored program, wherein when the program runs, a device where the storage medium is located is controlled to execute the leakage detection method.
In another aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, where the program instructions are loaded and executed by the processor to implement the above-mentioned liquid leakage detection method.
In the scheme of the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting liquid leakage according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for detecting liquid leakage according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for detecting liquid leakage according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a liquid leakage detection apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a computer device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the set thresholds in the embodiments of the present invention, the set thresholds should not be limited to these terms. These terms are used only to distinguish the set thresholds from each other. For example, the first set threshold may also be referred to as the second set threshold, and similarly, the second set threshold may also be referred to as the first set threshold, without departing from the scope of embodiments of the present invention.
Fig. 1 is a flowchart of a method for detecting liquid leakage according to an embodiment of the present invention, as shown in fig. 1, the method includes:
Specifically, a cyclic charge and discharge test is performed on the battery module for a specified number of times. Wherein the range of the designated times includes 1 to 5 times.
In the embodiment of the present invention, step 101 specifically includes: charging the battery module to the SOC in the first specified range; standing the charged battery module for a first time; and discharging the battery module to the SOC in the second specified range. Wherein the first specified range includes greater than 90% and less than or equal to 100%; the first time period is 5 minutes; the second specified range is greater than or equal to 0% and less than 5%.
And 102, carrying out vacuum detection on the battery module.
Specifically, the battery module is placed in a vacuum box in an inverted mode, the vacuum box is vacuumized according to the specified vacuum degree, and the vacuum box is kept standing for the second time. Wherein the specified vacuum level ranges from less than or equal to-85 kilopascals (kPa) and the second length of time ranges from 10 minutes to 30 minutes.
And 103, detecting leakage according to the appearance of the battery module.
Specifically, the appearance of the battery module is observed, whether electrolyte flows out is judged, and if yes, the leakage of a battery core of the battery module is indicated; if not, the battery core of the battery module is indicated to have no leakage.
In the technical scheme provided by the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
Fig. 2 is a flowchart of another liquid leakage detection method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
In an embodiment of the present invention, the battery module includes a lithium battery.
In the embodiment of the present invention, the range of the designated times includes 1 time to 5 times.
In the embodiment of the present invention, step 201 specifically includes:
in step 2011, the battery module is charged to a state of charge (SOC) within a first specified range.
In the embodiment of the invention, the battery module is charged with constant current and constant voltage.
In the embodiment of the present invention, SOC refers to the state of charge of the battery, that is: the available state of the remaining charge in the battery can be calculated by the following equation: SOC is (remaining charge level in the battery/rated charge capacity of the battery) x 100%.
In the embodiment of the present invention, the first specific range may be set according to actual conditions, and as an alternative, the first specific range includes more than 90% and less than or equal to 100%.
Step 2012, the charged battery module is kept standing for a first time.
In the embodiment of the present invention, the first time period may be set according to actual conditions, and as an alternative, the first time period is 5 minutes.
And 2013, discharging the battery module to the SOC in the second specified range.
In the embodiment of the invention, the battery module is subjected to constant current discharge.
In the embodiment of the present invention, the second specified range may be set according to actual conditions, and as an alternative, the second specified range includes more than or equal to 0% and less than 5%.
In the embodiment of the invention, the battery module is subjected to the cyclic charge and discharge test for the specified times, specifically, the steps 2011 to 2013 are repeatedly executed for 1 to 5 times, so that the cells are fully expanded and extruded, the cell leakage defect is effectively amplified, and the leakage condition is easily detected by the subsequent steps.
In the embodiment of the invention, the vacuum box is arranged in advance, the battery module is placed in the vacuum box in an inverted mode, and the liquid leakage condition can be detected more easily due to gravity.
And step 203, vacuumizing the vacuum box according to the specified vacuum degree.
In the embodiment of the present invention, the range of the designated vacuum degree includes less than or equal to-85 kilopascal (kPa), and the designated vacuum degree may be set according to actual conditions, as an alternative, the vacuum degree is set to-90 kPa.
And step 204, standing the vacuum box for a second time.
In the embodiment of the present invention, the second time period may be set according to actual conditions, and the range of the second time period includes 10 minutes to 30 minutes, as an alternative, the second time period is set to 20 minutes.
In the embodiment of the invention, the liquid is electrolyte.
In the embodiment of the invention, if it is determined that the battery module has electrolyte flowing out, indicating that the battery module has electrolyte leakage, the step 206 is continuously executed; if it is determined that the battery module has no electrolyte flowing out, indicating that the battery module has no electrolyte leakage, the step 207 is continuously executed.
And step 206, battery core leakage of the battery module.
And step 207, enabling the battery core of the battery module to have no leakage.
The following describes a process of detecting leakage of a battery module according to a specific embodiment:
the battery module is charged to 100% at constant current and constant voltage, the battery module is kept stand for 5 minutes, then the battery module is discharged to 0% at constant current, and the steps are repeated for 5 times, so that the cells are fully expanded and extruded, the leakage defect of the cells can be effectively amplified, and the leakage condition can be easily detected by the subsequent steps; placing the battery module in a preset vacuum box in an inverted mode, vacuumizing the vacuum box according to the vacuum degree of-90 kPa, and standing for 20 minutes; observing the appearance of the battery module, and judging the leakage of the battery core of the battery module if the battery module has electrolyte flowing out; if the battery module does not have electrolyte to flow out, judge that the electric core of battery module does not leak liquid.
In the technical scheme of the leakage detection method provided by the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
Fig. 3 is a flowchart of another liquid leakage detection method according to an embodiment of the present invention, as shown in fig. 3, the method includes:
and 301, carrying out cycle charge and discharge tests on the battery module for specified times.
In the embodiment of the present invention, step 301 specifically includes:
step 3011, charge the battery module to the SOC of the first designated range.
And 3012, standing the charged battery module for a first time.
Step 3013, discharge the battery module to the SOC of the second designated range.
And 302, inverting the battery module into the vacuum box.
In the embodiment of the invention, the vacuum box is arranged in advance, the battery module is placed in the vacuum box in an inverted mode, and the liquid leakage condition can be detected more easily due to gravity.
And step 303, vacuumizing the vacuum box according to the specified vacuum degree.
In the embodiment of the present invention, steps 301 to 304 are the same as steps 201 to 204, and are not described in detail herein.
In the embodiment of the present invention, if it is determined that the liquid flows out of the battery module, it is further determined whether the liquid is an electrolyte, and step 306 is continuously executed; if it is determined that the battery module has no electrolyte flowing out, indicating that the battery module has no electrolyte leakage, the step 207 is continuously executed.
In the embodiment of the present invention, if it is determined that the liquid has the electrolyte taste, indicating that the liquid is the electrolyte, the battery module is leaked, and step 307 is executed; if the liquid does not have the electrolyte taste, indicating that the liquid is not electrolyte, execution continues at step 308.
And 307, leaking the battery core of the battery module.
In the embodiment of the invention, if the battery module has liquid flowing out and the liquid has the electrolyte taste, the leakage of the electrolyte of the battery cell of the battery module is indicated.
And step 308, no leakage exists in the battery core of the battery module.
In the embodiment of the invention, if the battery module does not flow out or the liquid does not have the smell of the electrolyte, the battery cell electrolyte of the battery module is indicated.
The following describes a process of detecting leakage of a battery module according to a specific embodiment:
the battery module is charged to 100% at constant current and constant voltage, the battery module is kept stand for 5 minutes, then the battery module is discharged to 0% at constant current, and the steps are repeated for 5 times, so that the cells are fully expanded and extruded, the leakage defect of the cells can be effectively amplified, and the leakage condition can be easily detected by the subsequent steps; placing the battery module in a preset vacuum box in an inverted mode, vacuumizing the vacuum box according to the vacuum degree of-90 kPa, and standing for 10 minutes; observing the appearance of the battery module, and judging the leakage of the battery core of the battery module if the battery module has liquid flowing out and the liquid has the electrolyte taste; if the battery module does not have liquid outflow or this liquid does not have the electrolyte taste, judge that the electric core of battery module does not leak liquid.
In the technical scheme of the leakage detection method provided by the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
Fig. 4 is a schematic structural diagram of a liquid leakage detection apparatus according to an embodiment of the present invention, the apparatus is configured to perform the liquid leakage detection method, and as shown in fig. 4, the apparatus includes: a test unit 11, a first detection unit 12 and a second detection unit 13.
The test unit 11 is used for performing a charge and discharge test on the battery module.
The first detection unit 12 is used for performing vacuum detection on the battery module.
The second detection unit 13 is used for detecting leakage according to the appearance of the battery module.
In the embodiment of the present invention, the testing unit 11 is specifically configured to charge the battery module to a state of charge within a first specified range; standing the charged battery module for a first time; and discharging the battery module to the state of charge in the second specified range.
In the embodiment of the present invention, the testing unit 11 is further specifically configured to perform a specified number of times of cyclic charge and discharge tests on the battery module.
In the embodiment of the present invention, the first detecting unit 12 is specifically configured to invert the battery module into the vacuum box; vacuumizing the vacuum box according to the specified vacuum degree; the vacuum box was left standing for a second length of time.
In the embodiment of the present invention, the second detecting unit 13 is specifically configured to observe the appearance of the battery module and determine whether liquid flows out; if judge that there is the liquid outflow, the electric core weeping of battery module.
In the embodiment of the present invention, the second detecting unit 13 is further specifically configured to determine that no liquid flows out from the battery cell of the battery module.
In the scheme of the embodiment of the invention, a battery module is subjected to charge and discharge tests; carrying out vacuum detection on the battery module; according to the battery module appearance, carry out the weeping and detect, can detect the electric core weeping condition in the production process of battery module, guarantee the security of battery.
An embodiment of the present invention provides a storage medium, where the storage medium includes a stored program, where, when the program runs, a device in which the storage medium is located is controlled to execute each step of the above-described embodiment of the liquid leakage detection method, and for specific description, reference may be made to the above-described embodiment of the liquid leakage detection method.
An embodiment of the present invention provides a computer device, including a memory and a processor, where the memory is used to store information including program instructions, and the processor is used to control execution of the program instructions, and the program instructions are loaded and executed by the processor to implement the steps of the embodiment of the liquid leakage detection method.
Fig. 5 is a schematic diagram of a computer device according to an embodiment of the present invention. As shown in fig. 5, the computer device 30 of this embodiment includes: the processor 31, the memory 32, and the computer program 33 stored in the memory 32 and capable of running on the processor 31, where the computer program 33 is executed by the processor 31 to implement the method for detecting liquid leakage in the embodiment, and in order to avoid repetition, the details are not repeated herein. Alternatively, the computer program is executed by the processor 31 to implement the functions of the models/units applied to the leakage detection apparatus in the embodiments, which are not repeated herein to avoid redundancy.
The computer device 30 includes, but is not limited to, a processor 31, a memory 32. Those skilled in the art will appreciate that fig. 5 is merely an example of a computer device 30 and is not intended to limit the computer device 30 and that it may include more or fewer components than shown, or some components may be combined, or different components, e.g., the computer device may also include input output devices, network access devices, buses, etc.
The Processor 31 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 32 may be an internal storage unit of the computer device 30, such as a hard disk or a memory of the computer device 30. The memory 32 may also be an external storage device of the computer device 30, such as a plug-in hard disk provided on the computer device 30, a Smart Media (SM) Card, a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 32 may also include both internal and external storage units of the computer device 30. The memory 32 is used for storing computer programs and other programs and data required by the computer device. The memory 32 may also be used to temporarily store data that has been output or is to be output.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method and apparatus for detecting liquid leakage, the method comprising:
carrying out charge and discharge tests on the battery module;
carrying out vacuum detection on the battery module;
and detecting leakage according to the appearance of the battery module.
2. The method according to claim 1, wherein the performing of the charge and discharge test on the battery module comprises:
charging the battery module to a state of charge within a first specified range;
standing the charged battery module for a first time;
and discharging the battery module to the state of charge in a second specified range.
3. The method according to claim 1, wherein the performing the charge and discharge test on the battery module comprises:
and carrying out the cycle charge and discharge test of the battery module for specified times.
4. The method according to claim 1, wherein the vacuum detecting the charged battery module comprises:
the battery module is placed in a vacuum box in an inverted mode;
vacuumizing the vacuum box according to a specified vacuum degree;
and standing the vacuum box for a second time.
5. The method according to claim 1, wherein the detecting leakage according to the appearance of the battery module comprises:
observing the appearance of the battery module, and judging whether liquid flows out;
if it has liquid outflow to judge, the electric core weeping of battery module.
6. The method of claim 5, further comprising:
if no liquid flows out, the battery core of the battery module has no leakage.
7. The method of claim 2, wherein the first specified range comprises greater than 90% and less than or equal to 100%, and the second specified range comprises greater than or equal to 0% and less than 5%.
8. The method of claim 3, wherein the specified number of times ranges from 1 time to 5 times.
9. The method of claim 4, wherein the range of specified vacuum degrees comprises less than or equal to-85 kilopascals; the second length of time ranges from 10 minutes to 30 minutes.
10. An electrical leakage detection apparatus, comprising:
the testing unit is used for carrying out charge and discharge testing on the battery module;
the first detection unit is used for carrying out vacuum detection on the battery module;
and the second detection unit is used for detecting leakage according to the appearance of the battery module.
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| CN202011589312.2A CN112816139A (en) | 2020-12-29 | 2020-12-29 | Liquid leakage detection method and device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134511A1 (en) * | 2004-12-22 | 2006-06-22 | Toyota Jidosha Kabushiki Kaisha | Battery, manufacturing method of battery, and check method of electrolyte leakage |
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing method |
| CN108241127A (en) * | 2017-12-29 | 2018-07-03 | 江西省汇亿新能源有限公司 | A kind of safety detecting method of lithium battery |
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2020
- 2020-12-29 CN CN202011589312.2A patent/CN112816139A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060134511A1 (en) * | 2004-12-22 | 2006-06-22 | Toyota Jidosha Kabushiki Kaisha | Battery, manufacturing method of battery, and check method of electrolyte leakage |
| CN104729798A (en) * | 2015-04-02 | 2015-06-24 | 天津力神电池股份有限公司 | Battery sealing performance testing method |
| CN108241127A (en) * | 2017-12-29 | 2018-07-03 | 江西省汇亿新能源有限公司 | A kind of safety detecting method of lithium battery |
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