CN110715747A - Detection method based on soft package battery tab connection - Google Patents
Detection method based on soft package battery tab connection Download PDFInfo
- Publication number
- CN110715747A CN110715747A CN201910974735.7A CN201910974735A CN110715747A CN 110715747 A CN110715747 A CN 110715747A CN 201910974735 A CN201910974735 A CN 201910974735A CN 110715747 A CN110715747 A CN 110715747A
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- China
- Prior art keywords
- polyimide film
- package battery
- sensor
- layer
- soft
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
Abstract
The invention discloses a detection method based on the tab connection of a soft-package battery, which comprises the following steps: step one, unfolding a laminated positive electrode layer, a laminated negative electrode layer and a diaphragm layer of the soft package battery; selecting an aluminum pole lug plate with proper length, width and thickness; thirdly, flatly paving the sensor on a polyimide film, winding a sensor lead on a tab through a connecting hole, and sticking a layer of polyimide film on the upper surface of the sensor; fourthly, marking corresponding marks on each polar lug piece; and step five, placing the folded soft package battery in the step four in a drying oven for standing for 12 hours for packaging, and connecting the lug plates with external receiving equipment. According to the detection method based on the tab connection of the soft package battery, the sensor can be effectively arranged in the soft package battery through the arrangement of the first step to the fifth step, and then the sensor is led out through the tab, so that the temperature in the soft package battery can be accurately detected.
Description
Technical Field
The invention relates to a battery temperature detection method, in particular to a detection method based on soft package battery tab connection.
Background
Lithium ion batteries are mainly classified into three types, namely square, cylindrical and soft-package lithium ion batteries, which are widely applied to various fields due to high specific energy, long cycle life, flexible appearance design and excellent safety performance of lithium ions, but under extreme working conditions (high temperature, low temperature, vibration and the like) or artificial abuse conditions (thermal abuse, mechanical abuse, overcharge, overdischarge and the like), the temperature difference between the surface temperature of the battery and the internal core temperature, internal pressure change due to gas generation, microscopic deformation of the battery and the like are very easy to cause thermal runaway, and further serious accidents are induced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a detection method based on the tab connection of a soft-package battery to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: a detection method based on soft-package battery tab connection comprises the following steps:
step one, unfolding a laminated positive electrode layer, a laminated negative electrode layer and a diaphragm layer of the soft package battery, and attaching a polyimide film on the diaphragm layer in the center;
selecting an aluminum pole lug piece with proper length, width and thickness, and drilling a lead connecting hole at one end of the pole lug piece;
thirdly, flatly paving the sensor on a polyimide film, winding a sensor lead on a tab through a connecting hole, and sticking a layer of polyimide film on the upper surface of the sensor;
marking each pole lug piece correspondingly, then re-folding the positive pole layer, the negative pole layer and the diaphragm layer, carrying out short circuit test and detecting whether each sensor is connected or not;
and step five, placing the folded soft package battery in the step four in a drying oven for standing for a short time for packaging, and connecting the lug plate with external receiving equipment.
As a further improvement of the invention, the thickness of the pole tab is 0.2 mm.
As a further improvement of the present invention, the sensor includes a strain gauge, a heater sheet, a center thermocouple, and a corner thermocouple, the center thermocouple being attached to the center of the polyimide film, the heater sheet being attached to the polyimide film at a position near the center thermocouple, the corner thermocouple being attached to the polyimide film at a position near a corner thereof, and the strain gauge being attached to the polyimide film at a position near the corner thermocouple.
As a further improvement of the present invention, in the step five, the packaging step includes laminating and attaching a positive electrode layer and an upper diaphragm layer in this order from bottom to top on the upper side of the polyimide film on the upper side of the sensor, and laminating and attaching a lower diaphragm layer, a negative electrode layer, and another lower diaphragm layer in this order from top to bottom on the lower side of the polyimide film on the lower side of the sensor.
As a further improvement of the invention, a positive electrode tab led out to the outside is inserted between the positive electrode layer and the polyimide film, and a negative electrode tab led out to the outside is inserted between the negative electrode layer and the lower diaphragm layer attached with the polyimide film.
As a further improvement of the invention, in the second step, after the wire connecting hole is drilled, a strip-shaped insulating sheet is arranged, and the tabs are inserted in the insulating sheet side by side.
The invention has the advantages that the sensor can be effectively implanted into the soft-package battery through the arrangement of the first step, the second step and the third step, the data of the sensor can be effectively output to the outside through the tabs, then the sensor can be effectively ensured to be in a usable state through the arrangement of the fourth step and the fifth step, and the soft-package battery can be effectively packaged to avoid the problem easily occurring in the using process.
Drawings
Fig. 1 is a schematic diagram of a pouch cell structure using the detection method of the present invention;
fig. 2 is an internal cross-sectional view of a pouch battery using the detection method of the present invention.
Detailed Description
The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.
Referring to fig. 1 to 2, a detection method based on tab connection of a pouch battery according to the embodiment includes the following steps:
step one, unfolding a laminated positive electrode layer, a laminated negative electrode layer and a diaphragm layer of the soft package battery, and attaching a polyimide film on the diaphragm layer in the center;
selecting an aluminum pole lug piece with proper length, width and thickness, and drilling a lead connecting hole at one end of the pole lug piece;
thirdly, flatly paving the sensor on a polyimide film, winding a sensor lead on a tab through a connecting hole, and sticking a layer of polyimide film on the upper surface of the sensor;
marking each pole lug piece correspondingly, then re-folding the positive pole layer, the negative pole layer and the diaphragm layer, carrying out short circuit test and detecting whether each sensor is connected or not;
step five, put the laminate polymer battery that step fourfold is good in the drying cabinet and stew for 12 hours and wait to encapsulate, be connected utmost point auricle and outside receiving equipment, through the setting of five above-mentioned steps, alright implant laminate polymer battery inside with the sensor, then pass through the effectual transmission of utmost point ear with sensor data to the external world, consequently compare in prior art and adopt the mode that detects battery surface temperature, the monitoring battery thermal runaway that can be more accurate.
As an improved specific embodiment, the thickness of the pole tab is 0.2mm, and the thickness of the pole tab is as thin as possible due to the layered structure of the pouch battery, so that the data of the built-in sensor can be effectively transmitted to the outside without affecting the structure of the pouch battery by setting the thickness of the pole tab to 0.2 mm.
As a modified specific embodiment, the sensor comprises a strain gauge 7, a heating plate 5, a central thermocouple 4 and a corner thermocouple 6, wherein the central thermocouple 4 is attached to the center of the polyimide film, the heating plate 5 is attached to the position of the polyimide film close to the central thermocouple 4, the corner thermocouple 6 is attached to the position of the polyimide film close to the corner of the polyimide film, the strain gauge 7 is attached to the position of the polyimide film close to the corner thermocouple 6, the central thermocouple 4 and the corner thermocouple 6 are respectively located at the center and the corner of the interior of the battery, the core temperature of the interior of the battery can be accurately measured, and the temperature distribution of the whole battery can be estimated through the temperature difference between the center and the corner; the heating sheet 5 has the function of preheating the battery when the ambient temperature is too low, so that the problems of separation of lithium dendrite and increase of lithium ion migration impedance caused by increase of viscosity of electrolyte in the use of the battery in a low-temperature environment can be effectively avoided; but the inside microcosmic deformation of foil gage 7 real-time measurement battery, so alright omnidirectional detection laminate polymer battery's temperature and state to this fine realization one control battery's thermal runaway's effect.
As an improved specific implementation manner, in the step five, the positive electrode layer 12 and the upper diaphragm layer 11 are sequentially laminated and attached to the upper side surface of the polyimide film on the upper side of the sensor from bottom to top, and the lower diaphragm layer 16, the negative electrode layer 17 and the other lower diaphragm layer 16 are sequentially laminated and attached to the lower side surface of the polyimide film on the lower side surface of the sensor from top to bottom.
As an improved specific embodiment, a positive electrode tab 3 led to the outside is inserted between the positive electrode layer 12 and the polyimide film, a negative electrode tab 1 led to the outside is inserted between the negative electrode layer 17 and the lower separator layer 16 attached to the polyimide film, and the positive electrode and the negative electrode of the soft package battery can be simply and effectively led out through the arrangement of the positive electrode tab 3 and the negative electrode tab 1.
As an improved specific implementation manner, in the second step, after the wire connection hole is drilled, a strip-shaped insulating sheet 9 is arranged, and each tab is inserted into the insulating sheet 9 side by side, so that a plurality of tabs can be effectively connected side by setting the insulating sheet 9, and the tabs cannot be influenced by each other.
In summary, in the detection method of the present embodiment, through the arrangement of the first step to the fifth step, the sensor can be effectively embedded into the soft package battery, and then the data of the sensor is led out through the tab.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A detection method based on soft-package battery tab connection is characterized by comprising the following steps: the method comprises the following steps:
step one, unfolding a laminated positive electrode layer, a laminated negative electrode layer and a diaphragm layer of the soft package battery, and attaching a polyimide film on the diaphragm layer in the center;
selecting an aluminum pole lug piece with proper length, width and thickness, and drilling a lead connecting hole at one end of the pole lug piece;
thirdly, flatly paving the sensor on a polyimide film, winding a sensor lead on a tab through a connecting hole, and sticking a layer of polyimide film on the upper surface of the sensor;
marking each pole lug piece correspondingly, then re-folding the positive pole layer, the negative pole layer and the diaphragm layer, carrying out short circuit test and detecting whether each sensor is connected or not;
and step five, placing the folded soft package battery in the step four in a drying oven for standing for 12 hours for packaging, and connecting the lug plates with external receiving equipment.
2. The detection method based on the tab connection of the soft-package battery according to claim 1, characterized in that: the thickness of the pole lug piece is 0.2 mm.
3. The detection method based on the tab connection of the soft-package battery according to claim 1 or 2, characterized in that: the sensor comprises a strain gauge (7), a heating plate (5), a central thermocouple (4) and a corner thermocouple (6), wherein the central thermocouple (4) is attached to the center of the polyimide film, the heating plate (5) is attached to the position, close to the central thermocouple (4), of the polyimide film, the corner thermocouple (6) is attached to the position, close to the corner of the polyimide film, and the strain gauge (7) is attached to the position, close to the corner thermocouple (6), of the polyimide film.
4. The detection method based on the tab connection of the soft-package battery according to claim 1 or 2, characterized in that: and in the packaging step in the fifth step, a positive electrode layer (12) and an upper diaphragm layer (11) are sequentially laminated and attached to the upper side face of the polyimide film on the upper side face of the sensor from bottom to top, and a lower diaphragm layer (16), a negative electrode layer (17) and another lower diaphragm layer (16) are sequentially laminated and attached to the lower side face of the polyimide film on the lower side face of the sensor from top to bottom.
5. The detection method based on the tab connection of the soft-package battery according to claim 4, characterized in that: an anode tab (3) led out to the outside is inserted between the anode layer (12) and the polyimide film, and a cathode tab (1) led out to the outside is inserted between the cathode layer (17) and the lower diaphragm layer (16) attached to the polyimide film.
6. The detection method based on the tab connection of the soft-package battery according to claim 1 or 2, characterized in that: and in the second step, after the wire connecting hole is drilled, a strip-shaped insulating sheet (9) is arranged, and the lugs are inserted into the insulating sheet (9) side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974735.7A CN110715747A (en) | 2019-10-14 | 2019-10-14 | Detection method based on soft package battery tab connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974735.7A CN110715747A (en) | 2019-10-14 | 2019-10-14 | Detection method based on soft package battery tab connection |
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| CN110715747A true CN110715747A (en) | 2020-01-21 |
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| CN201910974735.7A Pending CN110715747A (en) | 2019-10-14 | 2019-10-14 | Detection method based on soft package battery tab connection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054206A (en) * | 2020-09-30 | 2020-12-08 | 电子科技大学 | Battery current collector integrating temperature sensing function, preparation method of battery current collector, battery device and preparation method of battery device |
| EP4089791A4 (en) * | 2020-03-11 | 2023-08-09 | LG Energy Solution, Ltd. | Secondary battery and lithium precipitation detection method therefor |
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| US20180024011A1 (en) * | 2008-06-04 | 2018-01-25 | Jp Laboratories | Indicating Devices Based on Etching of Metals |
| CN109065961A (en) * | 2018-08-09 | 2018-12-21 | 北京理工大学 | A kind of production method that multipoint mode internal temperature monitors integrated electrochemical cell |
| CN109378556A (en) * | 2018-10-30 | 2019-02-22 | 江苏塔菲尔新能源科技股份有限公司 | A kind of thermal resistance composite foil with rapid heating function and the battery core and battery using it |
| CN109818091A (en) * | 2019-01-25 | 2019-05-28 | 深圳瑞隆新能源科技有限公司 | A kind of lithium ion battery |
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2019
- 2019-10-14 CN CN201910974735.7A patent/CN110715747A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20180024011A1 (en) * | 2008-06-04 | 2018-01-25 | Jp Laboratories | Indicating Devices Based on Etching of Metals |
| CN106711512A (en) * | 2017-02-21 | 2017-05-24 | 山东玉皇新能源科技有限公司 | Method for producing soft pack batteries based on measurable battery internal temperature device |
| CN109065961A (en) * | 2018-08-09 | 2018-12-21 | 北京理工大学 | A kind of production method that multipoint mode internal temperature monitors integrated electrochemical cell |
| CN109378556A (en) * | 2018-10-30 | 2019-02-22 | 江苏塔菲尔新能源科技股份有限公司 | A kind of thermal resistance composite foil with rapid heating function and the battery core and battery using it |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4089791A4 (en) * | 2020-03-11 | 2023-08-09 | LG Energy Solution, Ltd. | Secondary battery and lithium precipitation detection method therefor |
| CN112054206A (en) * | 2020-09-30 | 2020-12-08 | 电子科技大学 | Battery current collector integrating temperature sensing function, preparation method of battery current collector, battery device and preparation method of battery device |
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Application publication date: 20200121 |