CN213068544U - Soft-package battery broken gas collection and measurement device - Google Patents
Soft-package battery broken gas collection and measurement device Download PDFInfo
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- CN213068544U CN213068544U CN202021484549.XU CN202021484549U CN213068544U CN 213068544 U CN213068544 U CN 213068544U CN 202021484549 U CN202021484549 U CN 202021484549U CN 213068544 U CN213068544 U CN 213068544U
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Abstract
The utility model discloses a soft packet of battery breaks mouthful and produces gas collection measuring device, include: the collecting device is used for collecting gas generated after the opening of the soft package battery is broken; the measuring device is used for measuring the gas quantity generated by the opening of the soft package battery; the detection device is arranged on the collection device, is communicated with the interior of the collection device and is used for measuring the air pressure and the temperature of the gas generated by the crevasse of the soft package battery; a pressurizing device; the collecting device comprises an aluminum-plastic film packaging bag and inert gas filled in the aluminum-plastic film packaging bag; and a switching lug pressurizing device is arranged outside the collecting device and is electrically connected with the switching lugs. The device eliminates the measurement error caused by the change of air pressure and temperature in the traditional measurement method, realizes the accurate measurement of the gas production of the soft package battery, can detect the change of the gas volume, the air pressure and the temperature in the process of generating gas to the opening of the battery in real time, and realizes the collection and analysis of the gas generated by the opening of the battery.
Description
Technical Field
The utility model belongs to the technical field of gas collection measurement and specifically relates to a gas collection measuring device is produced to laminate polymer battery breach.
Background
The soft package battery is a power supply device which is packaged by a flexible outer package, is provided with positive and negative electrode active substances, electrolyte, a diaphragm and the like and can realize mutual conversion of electric energy and chemical energy. The soft package battery is under the effect of electricity or heat, and the internal material can take place physical or chemical change, produces gas, when gas accumulation to a certain extent, just can break soft package battery's flexible extranal packing, causes soft package battery breach, produces the gas for the breach.
In the prior art, a method or a device for measuring the gas production amount of a soft package battery mainly adopts a drainage method to measure the gas production amount of the soft package battery in a specific gas production state. For example, a patent with publication number CN108844592A disclosed in chinese patent literature provides a device for measuring gas production of a lithium ion soft package battery, which comprises a liquid container, a overflowed liquid collecting container and a suspension device, and measures the gas production of the soft package battery to be measured due to a formation process by measuring the difference between the volumes of liquid overflowing from the liquid container before and after formation. However, in the existing scheme, the gas production of the soft package battery is measured under the pressure of external medium liquid, so that the measurement result is inaccurate, the gas production of the broken opening of the battery cannot be measured, and the medium liquid in the device is greatly fluctuated in the process of bulging and breaking of the soft package battery, so that the measurement result is inaccurate. Meanwhile, medium liquid invades in the battery, so that great potential safety hazard exists. In addition, in the prior art, the gas component collection after the gas generation of the soft package battery is broken cannot be realized, and the gas generation process of the soft package battery cannot be dynamically monitored.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the prior art, the broken mouth of the laminate polymer battery produces the gas and measures inaccurately, can't carry out real time monitoring and can't collect and analyze laminate polymer battery broken mouth and produce the not enough of gas composition to producing the gas state, provides one kind can real-time detection battery from producing gas until the gaseous volume of broken mouth in-process, atmospheric pressure and temperature variation, can the accurate determination laminate polymer battery produce gas volume and realize producing the broken mouth of the laminate polymer battery and produce gas and collect measuring device.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a soft packet of battery breach gas collection measuring device that produces, includes:
the collecting device is used for collecting gas generated after the opening of the soft package battery is broken; the collecting device comprises an aluminum-plastic film packaging bag and inert gas filled in the aluminum-plastic film packaging bag;
the measuring device is used for measuring the gas quantity generated by the opening of the soft package battery; the measuring device comprises a liquid containing groove with an overflow port and an overflow collecting container;
the detection device is arranged on the collection device, is communicated with the interior of the collection device and is used for measuring the air pressure and the temperature of the gas generated by the crevasse of the soft package battery; and
a pressurizing device: the device is electrically connected with the collecting device and used for pressurizing and breaking the opening of the soft package battery;
wherein, the outside of the collecting device is provided with a switching lug; and the pressurizing device is electrically connected with the adapter tabs.
The broken opening gas production gas collection and measurement device for the soft package battery is characterized in that a collection device is designed, the collection device comprises an aluminum-plastic film packaging bag capable of containing the soft package battery to be measured, the soft package battery to be measured is placed in the aluminum-plastic film packaging bag and is subjected to sealing treatment, inert gas is filled in the aluminum-plastic film packaging bag, a switching lug is arranged at the sealing position of the aluminum-plastic film packaging bag, in the process of collection and measurement, the lug of the soft package battery to be measured is electrically connected with the switching lug in a welding mode, the soft package battery can be electrically connected with the outside through the aluminum-plastic film packaging bag through the switching lug, namely, the soft package battery is conveniently electrically connected with a pressurizing device, and then the pressurizing device is used for pressurizing the soft package battery to be broken to produce gas; during detection, the collecting device is placed in the measuring device, and the measuring device is used for measuring the gas quantity generated by the opening of the soft package battery; meanwhile, the gas generated after the opening of the soft package battery in the aluminum-plastic film packaging bag is broken is detected in real time through the detection device. The aluminum-plastic film packaging bag is adopted, the aluminum-plastic film has high barrier property and good heat sealing property, the material is resistant to corrosion of electrolyte and strong acid, has good ductility, flexibility and mechanical strength, and meets the requirements of serving as a packaging material. And inert gas is arranged in the aluminum plastic film packaging bag, and the inert gas can prevent gas generated by the broken opening of the flexible package battery from generating chemical reaction with other gas so as to avoid influencing the accuracy of the measurement result. In addition, the influence on the accuracy of the measuring result caused by the fact that the volume of the packaging bag changes unobviously due to small gas production amount at the broken opening can be avoided. When the device for collecting and measuring the gas yield of the broken gas of the soft package battery is used for measuring the gas yield of the broken gas of the soft package battery, firstly, high-electrical-insulation medium liquid is injected into a liquid containing groove, firstly, low-viscosity silicone oil is injected, the containing amount of the medium liquid is limited to just not overflow from an overflow port, before the collection device is prepared, an aluminum-plastic film packaging bag, the soft package battery and a switching lug are immersed into the medium liquid, and the arrangement is adoptedLiquid method, measure the volume of the above solid matter, record it as V0; secondly, connecting a switching tab of a broken gas generating gas collecting device of the soft package battery with a pressurizing device, and connecting a gas pressure sensor with an aluminum plastic film packaging bag by using a gas pipe; connecting a temperature sensor with the inside of the aluminum plastic film packaging bag by using a wire, connecting the adapter tabs of the collecting device with a pressurizing device, immersing the connected collecting device into the medium liquid again, and recording the volume V1, the internal air pressure P1 and the temperature T1 of the collecting device; then, charging the laminate polymer battery by using a pressurizing device, and recording the volume V2, the internal air pressure P2 and the temperature T2 of the collecting device after the laminate polymer battery generates gas and breaks the opening; then, calculating the gas generation amount before and after the gas generation of the battery according to an ideal gas equation pV ═ nRT according to the measured values of the volume, the gas pressure and the temperature, wherein the gas generation amount is as follows:
and calculating the volume of the gas before and after the gas generating break of the soft package battery as follows: Δ V ═ Δ n × 22.4L (0 ℃, 100 kPa); and finally, after the steps are completed, extracting gas in the aluminum-plastic film packaging bag, judging gas generating components, and performing gas component analysis. The collecting and measuring device eliminates measuring errors caused by air pressure and temperature changes in the traditional drainage method for measuring the gas production of the battery, realizes accurate measurement of the gas production of the soft package battery, can detect the gas production of the battery in real time until the gas volume, the air pressure and the temperature change in the process of breaking the opening, and realizes the collection, measurement and analysis of the gas produced by the breaking opening.
Preferably, the overflow collecting container is placed below the overflow opening. When the measuring device is used, the liquid containing groove is filled with high-electrical insulation medium liquid, the gas production amount of the broken opening of the soft battery pack to be detected is measured through the change of the liquid volume, the liquid is discharged through the opening arranged above the liquid containing groove, the overflow collecting container is placed below the overflow opening and used for collecting the liquid overflowing from the overflow opening of the liquid containing groove, and then the volume of the soft battery pack to be detected around the broken opening can be obtained, so that the gas production amount is obtained.
Preferably, the liquid containing groove is filled with an electric insulating medium liquid. The liquid containing groove is filled with high-electric insulation medium liquid, and the medium liquid is preferably low-viscosity silicone oil, so that the gas production of the opening of the tested soft package battery can be conveniently measured, and the insulation performance can be ensured.
Preferably, the overflow collecting container is provided with volume scales. More preferably, the overflow collecting container is a measuring cylinder, the accuracy of the measuring cylinder is high and can reach a few milliliters, no danger exists, and the volume value does not need to be converted according to the liquid density, so that the error generated in the conversion process is avoided, and the measurement accuracy is not influenced.
Preferably, the detection device comprises a gas pressure sensor for detecting the gas pressure in the collection device in real time and a temperature sensor for detecting the gas temperature in the collection device in real time. The air pressure sensor and the temperature sensor are arranged for detecting the air pressure and the air temperature inside the aluminum-plastic film packaging bag in real time.
Preferably, the voltage-applying device is a battery charger. The pressurizing device is used for charging the soft package battery so that the soft package battery can realize the gas generation through the broken opening, and the purposes of gas collection and measurement are realized.
The utility model has the advantages of it is following and beneficial effect: measurement errors caused by changes of air pressure and temperature in a traditional drainage method for measuring the gas production rate of the battery are eliminated, accurate measurement of the gas production rate of the soft package battery is achieved, meanwhile, the changes of the volume, the air pressure and the temperature of the gas in the process of detecting the gas production of the battery till the opening is broken can be detected in real time, and collection, measurement and analysis of the gas produced by the opening are achieved.
Drawings
Fig. 1 is a schematic structural diagram of the soft package battery breach gas production gas collection and measurement device of the present invention;
fig. 2 is a schematic structural diagram of the collecting device of the present invention for packaging the pouch battery;
fig. 3 is an application structure schematic diagram of the soft package battery breach gas production gas collection and measurement device of the present invention;
in the figure: 1. packaging the aluminum plastic film; 2. a liquid containing tank; 3. a spill collection container; 4. a pressurizing device; 5. an air pressure sensor; 6. a temperature sensor; 7. an overflow port; 8. the battery comprises a transfer tab 9, a soft package battery 10 and an electric insulation medium liquid.
Detailed Description
The technical solution of the present invention will be further described in detail by the following specific embodiments with reference to the accompanying drawings.
Example 1:
in the embodiment shown in fig. 1, the soft package battery breach gas generation collection and measurement device comprises:
the collecting device is used for collecting gas generated after the opening of the soft package battery is broken; the collecting device comprises an aluminum-plastic film packaging bag 1 and inert gas filled in the aluminum-plastic film packaging bag;
the measuring device is used for measuring the gas quantity generated by the opening of the soft package battery; the measuring device comprises a liquid containing groove 2 with an overflow port and an overflow collecting container 3;
the detection device is arranged on the collection device, is communicated with the interior of the collection device and is used for measuring the air pressure and the temperature of the gas generated by the crevasse of the soft package battery; and
the pressurizing device 4: the device is electrically connected with the collecting device and used for pressurizing and breaking the opening of the soft package battery;
wherein, the outside of the collecting device is provided with a switching tab 8; the pressure device 4 is electrically connected with the adapter tab 8.
The overflow collecting container 3 is arranged below the overflow opening 7. The liquid containing groove 2 is filled with electric insulating medium liquid. The overflow collecting container 3 is provided with volume scales. The detection device comprises a gas pressure sensor 5 for detecting the gas pressure in the collection device in real time and a temperature sensor 6 for detecting the gas temperature in the collection device in real time. The pressurizing means 4 is a battery charger.
This gas collection measuring device is produced to laminate polymer battery breach, including collection device, measuring device, detection device and pressure device: the collecting device comprises an aluminum-plastic film packaging bag 1 capable of containing the soft package battery to be tested, the aluminum-plastic film packaging bag 1 is formed by packaging an aluminum-plastic film, the aluminum-plastic film is high in barrier property and good in heat sealing performance, the material is resistant to corrosion of electrolyte and strong acid, and the aluminum-plastic film packaging bag has good ductility, flexibility and mechanical strength and meets the requirement of serving as a packaging material. The inside inert gas that is provided with of plastic-aluminum membrane encapsulation bag 1, inert gas can prevent that the gas that the laminate polymer battery crevasse produced and other gas from taking place chemical reaction to influence the accuracy of measuring result. In addition, the influence on the accuracy of the measuring result caused by the fact that the volume of the packaging bag changes unobviously due to small gas production amount at the broken opening can be avoided. As shown in fig. 2, when gas collection and measurement are performed, the flexible package battery to be measured is placed in the aluminum plastic film packaging bag 1, and the aluminum plastic film packaging bag 1 is subjected to sealing treatment. The outer side of a sealing position of one side of the aluminum plastic film packaging bag 1 is provided with a switching lug 8, in the process of collection and measurement, a tab of a soft package battery to be measured is connected with the switching lug 8 in a welding mode, and a soft package battery 9 can be electrically connected with the outside through the aluminum plastic film packaging bag 1 through the switching lug; the collecting device is placed inside the measuring device in the process of collecting the measurement; the detection device comprises an air pressure sensor 5 and a temperature sensor 6, and is communicated with the inside of the aluminum plastic film packaging bag 1 so as to detect the air pressure and the air temperature inside the aluminum plastic film packaging bag in real time; the pressurizing device 4 is a battery charger, is connected with the switching lug, enables the battery to generate gas through charging, and then triggers the self aluminum-plastic film packaging crevasse of the soft package battery to be tested.
The measuring device comprises a liquid containing groove 2 filled with medium liquid, a liquid overflowing opening 7 and an overflowing liquid collecting container 3, wherein the medium liquid is high in electric insulation performance, and low-viscosity silicone oil is preferred. The collecting device is taken and placed through an opening above the liquid containing tank 2, and the overflow collecting container 3 is placed below the overflow port 7 and used for collecting liquid overflowing from the overflow port of the liquid containing tank 2. The overflow collecting container 3 is a measuring cylinder, the accuracy of the measuring cylinder is high, the accuracy can reach a few milliliters, no danger exists, the volume value does not need to be converted according to the liquid density, and the errors generated in the conversion process and the influence on the measurement accuracy are avoided.
As shown in fig. 3, when gas measurement needs to be started, firstly, a high-electrical-insulation medium liquid, preferably low-viscosity silicone oil, is injected into the liquid containing tank 2, the containing amount of the medium liquid is limited to just not overflow from the overflow port, before the soft-package battery breach gas production gas collection device is prepared, the volumes of the aluminum-plastic film packaging bag 1, the soft-package battery 9 and the adapter tab 8 are measured by adopting a liquid discharge method, the solid substances are immersed into the medium liquid, at the moment, the liquid is discharged, overflows from the overflow port 7 and is collected into the overflow collection container 3, the overflow collection container 3 is provided with volume scales, and the volume of the liquid is read through the scales and is marked as V0.
Secondly, connecting a switching tab of the gas collecting device for the opening of the flexible package battery to a pressurizing device 4, and connecting an air pressure sensor 5 with the aluminum-plastic film packaging bag 1 by using an air pipe so as to detect the internal air pressure of the aluminum-plastic film packaging bag in real time; the temperature sensor 6 is connected with the inside of the aluminum plastic film packaging bag 1 by a lead so as to detect the gas temperature of the soft package battery in the aluminum plastic film packaging bag in real time, the connected device is immersed into the medium liquid again, the volume of the discharged liquid is read by the scales on the overflowing liquid collecting container 3 and is recorded as V1, and the volume V1, the internal air pressure P1 and the temperature T1 of the device are recorded.
Then, charging the laminate polymer battery by using a pressurizing device, reading the volume of the discharged liquid again through the scale on the overflow collecting container after the laminate polymer battery is broken by gas production, marking the volume as V2, and recording the volume V2, the internal air pressure P2 and the temperature T2 of the device; then, calculating the gas generation amount before and after the gas generation of the battery according to an ideal gas equation pV ═ nRT according to the measured values of the volume, the gas pressure and the temperature, wherein the gas generation amount is as follows:
and calculating the volume of the gas before and after the gas generating break of the soft package battery as follows: Δ V ═ Δ n × 22.4L (0 ℃, 100 kPa).
And finally, after the steps are completed, extracting gas in the aluminum-plastic film packaging bag, judging gas generating components, and performing gas component analysis.
According to the device for collecting and measuring the gas generated by the broken opening of the soft package battery, the measurement error caused by the change of air pressure and temperature in the traditional method for measuring the gas generated by the battery by a drainage method is eliminated, the accurate measurement of the gas generated by the soft package battery is realized, meanwhile, the gas generated by the battery can be detected in real time until the gas changes of the volume, the air pressure and the temperature in the process of breaking the opening, and the collection, the measurement and the analysis of the gas generated by the broken opening are realized.
The above-described embodiments are only some of the embodiments of the present invention, and not all of them. Meanwhile, based on the embodiments described in the present disclosure, under the premise that creative labor is not made, all other embodiments obtained on the basis of the technical solution of the present application by a person of ordinary skill in the art should belong to the protection scope of the present disclosure.
Claims (6)
1. The utility model provides a gas collection measuring device is produced to laminate polymer battery breach which characterized in that includes:
the collecting device is used for collecting gas generated after the opening of the soft package battery is broken; the collecting device comprises an aluminum plastic film packaging bag (1) and inert gas filled in the aluminum plastic film packaging bag (1);
the measuring device is used for measuring the gas quantity generated by the opening of the soft package battery; the measuring device comprises a liquid containing groove (2) with an overflow port (7) and an overflow collecting container (3);
the detection device is arranged on the collection device, is communicated with the interior of the collection device and is used for measuring the air pressure and the temperature of the gas generated by the crevasse of the soft package battery; and
pressurizing device (4): the device is electrically connected with the collecting device and used for pressurizing and breaking the opening of the soft package battery;
wherein, a switching lug (8) is arranged outside the collecting device; the pressurizing device (4) is electrically connected with the adapter tabs (8).
2. The soft-package battery breach gas production gas collection and measurement device according to claim 1, characterized in that: the overflow collecting container (3) is arranged below the overflow port (7).
3. The soft-package battery breach gas production gas collection and measurement device according to claim 2, characterized in that: the liquid containing groove (2) is filled with electric insulation medium liquid (10).
4. The soft-package battery breach gas production gas collection and measurement device according to claim 2, wherein a volume scale is arranged on the overflow liquid collection container (3).
5. The broken gas generation gas collection and measurement device of the soft package battery according to any one of claims 1 to 4, characterized in that: the detection device comprises a gas pressure sensor (5) for detecting the gas pressure in the collection device in real time and a temperature sensor (6) for detecting the gas temperature in the collection device in real time.
6. The broken gas generation gas collection and measurement device of the soft package battery according to any one of claims 1 to 4, characterized in that: the pressurizing device (4) is a battery charger.
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| CN202021484549.XU CN213068544U (en) | 2020-07-24 | 2020-07-24 | Soft-package battery broken gas collection and measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112699A (en) * | 2021-11-03 | 2022-03-01 | 元能科技（厦门）有限公司 | Method for evaluating packaging strength of aluminum plastic film of soft package lithium battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112699A (en) * | 2021-11-03 | 2022-03-01 | 元能科技（厦门）有限公司 | Method for evaluating packaging strength of aluminum plastic film of soft package lithium battery |
| CN114112699B (en) * | 2021-11-03 | 2023-10-20 | 元能科技（厦门）有限公司 | Evaluation method for packaging strength of aluminum plastic film of soft-package lithium battery |
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Effective date of registration: 20211118 Address after: No.855, Jianshe 2nd Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee after: Wanxiang A123 Co.,Ltd. Address before: No.855 Jianshe Er Road, Xiaoshan Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: Wanxiang A123 Co.,Ltd. Patentee before: Wanxiang Group Co., Ltd |