TWM517094U - Packaging film for battery for electrical performance test - Google Patents
Packaging film for battery for electrical performance test Download PDFInfo
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Abstract
Description
本創作係有關於一種電池包裝膜,且特別是有關於一種可用於電池電性測試的電池包裝膜。 This creation relates to a battery packaging film, and in particular to a battery packaging film that can be used for battery electrical testing.
電池之製作過程係以電池包裝膜包裝電池芯,接著再進行熱封處理及電解液的填充,最後封邊後完成電池的製作。製作完成的電池在出廠前還需進行電性測試。 The battery is manufactured by packaging the battery core with a battery packaging film, followed by heat sealing treatment and filling of the electrolyte, and finally completing the battery after the edge sealing. The finished battery must be electrically tested before leaving the factory.
二次電池,特別是在鋰離子二次電池的技術領域中,電池的熱安全性非常地重要。當二次電池的溫度增加時,二次電池即受到了熱衝擊(heat impact),這對組成電池的電解質、電極等電池的構成物會造成不利的影響。因此,即使經歷過熱衝擊的電池仍然可以繼續使用,但此電池卻會具有安全性上的風險還可能具有***或燃燒的高度危險性。雖然經過熱衝擊的電池仍可使用,但是為了電池的效能與安全性,檢驗此電池過去是否曾經受過熱衝擊變得非常重要。且,電池的熱衝擊歷史與電池的壽命亦息息相關。 Secondary batteries, particularly in the technical field of lithium ion secondary batteries, the thermal safety of batteries is very important. When the temperature of the secondary battery increases, the secondary battery is subjected to a heat impact, which adversely affects the constituents of the battery constituting the battery such as an electrolyte or an electrode. Therefore, even if the battery subjected to the overheating shock can continue to be used, the battery may have a safety risk and may have a high risk of explosion or combustion. Although the battery with thermal shock can still be used, it is very important to check whether the battery has been subjected to overheating in the past for the performance and safety of the battery. Moreover, the history of thermal shock of the battery is also closely related to the life of the battery.
因此,製作完成的電池在出廠前所進行的電性測試 中,除了需要測試電池充放電過程中的電容量,還要監控充放電過程中的電池的表面溫度。電池在快速充放電的過程中會使電池的溫度明顯上升,因表面溫度高於60℃時表示電池壽命較短,表面溫度高於70℃時表示電池短路,故在進行充放電測試時,若電池本體區的溫度超過60℃則應被視為不良品。 Therefore, the completed battery is electrically tested before leaving the factory. In addition to the need to test the battery capacity during charging and discharging, it is also necessary to monitor the surface temperature of the battery during charging and discharging. During the rapid charge and discharge process, the temperature of the battery will rise significantly. When the surface temperature is higher than 60 °C, the battery life is short. When the surface temperature is higher than 70 °C, the battery is short-circuited. Therefore, when performing charge and discharge test, If the temperature of the battery body area exceeds 60 °C, it should be regarded as a defective product.
習知的電池充放電過程中溫度監控方法係以溫度感應器量測電池中心的某一點。由於每一顆出廠的電池都必須要進行充放電測試至少一次,溫度感應器的裝拆時間、採購及維護費用,都會增加生產的時間成本,且習知的溫度檢測方法僅能量測電池之量測點溫度,無法對電池產品進行全面性的觀察,此外,針對不良品的檢分及標示需要花費人力完成以確保產品的品質及安全性。 The conventional temperature monitoring method during battery charging and discharging measures a certain point in the center of the battery with a temperature sensor. Since each factory battery must be tested for charge and discharge at least once, the temperature sensor's assembly and disassembly time, procurement and maintenance costs will increase the time cost of production, and the conventional temperature detection method only measures the battery. Measuring the temperature of the point, the battery product can not be comprehensively observed, in addition, the inspection and labeling of the defective product requires labor to complete to ensure the quality and safety of the product.
因此,目前仍需要一種用於電池電性測試的電池包裝膜,以解決前述問題。 Therefore, there is still a need for a battery packaging film for battery electrical testing to solve the aforementioned problems.
本創作提供一種用於電池電性測試的電池包裝膜,本創作之電池包裝膜可簡化電池的電性測試流程並提高電性測試的可信賴度。 The present invention provides a battery packaging film for battery electrical testing. The battery packaging film of the present invention simplifies the electrical testing process of the battery and improves the reliability of the electrical test.
本創作提供一種用於電池電性測試的電池包裝膜,其包含:鋁箔層;第一黏著層,其配置於前述鋁箔層之一表面上;聚烯烴密封層,藉由前述第一黏著層貼附於前述鋁箔層上;第二黏著層,其配置於前述鋁箔層相對於前述第一黏著層之另一表面上;耐熱樹脂層,藉由前述第二黏著層貼附於前述鋁箔層上;以 及熱傳感層,其配置於耐熱樹脂層之一表面上。 The present invention provides a battery packaging film for battery electrical testing, comprising: an aluminum foil layer; a first adhesive layer disposed on a surface of one of the aluminum foil layers; and a polyolefin sealing layer adhered by the first adhesive layer Attached to the aluminum foil layer; a second adhesive layer disposed on the other surface of the aluminum foil layer relative to the first adhesive layer; a heat resistant resin layer attached to the aluminum foil layer by the second adhesive layer; Take And a thermal sensing layer disposed on a surface of one of the heat resistant resin layers.
在本創作之一實施例中,其中前述熱傳感層之厚度可介於5微米(μm)至150微米(μm)之間。 In an embodiment of the present invention, the thickness of the aforementioned thermal sensing layer may be between 5 micrometers (μm) and 150 micrometers (μm).
在本創作之一實施例中,其中前述熱傳感層指示三種程度之溫度變化。 In one embodiment of the present invention, wherein the aforementioned thermal sensing layer indicates three degrees of temperature change.
在本創作之一實施例中,其中前述熱傳感層可在該耐熱樹脂層上塗覆一不可逆感溫變色油墨所形成,其顏色係依據溫度而變化,且已經變化的顏色不會再回復至先前的顏色。 In an embodiment of the present invention, the heat sensing layer may be formed by coating an irreversible thermochromic ink on the heat resistant resin layer, and the color thereof changes according to temperature, and the changed color does not return to the color. The previous color.
在本創作之一實施例中,其中前述感溫變色油墨具有一隨溫度變化之色調。 In an embodiment of the present invention, the thermochromic ink has a color tone that varies with temperature.
在本創作之一實施例中,其中前述鋁箔層之厚度介於10微米(μm)至100微米(μm)之間。 In an embodiment of the present invention, the thickness of the aforementioned aluminum foil layer is between 10 micrometers (μm) and 100 micrometers (μm).
在本創作之一實施例中,其中前述第一黏著層之厚度介於0.1微米(μm)至10微米(μm)之間。 In an embodiment of the present invention, the thickness of the first adhesive layer is between 0.1 micrometers (μm) and 10 micrometers (μm).
在本創作之一實施例中,其中前述第二黏著層之厚度介於0.1微米(μm)至10微米(μm)之間。 In an embodiment of the present invention, the thickness of the second adhesive layer is between 0.1 micrometers (μm) and 10 micrometers (μm).
在本創作之一實施例中,其中前述聚烯烴密封層可為鑄塑聚丙烯(CPP)膜。 In an embodiment of the present invention, the aforementioned polyolefin sealing layer may be a cast polypropylene (CPP) film.
在本創作之一實施例中,其中前述聚烯烴密封層之厚度介於20微米(μm)至80微米(μm)之間。 In one embodiment of the present invention, the thickness of the aforementioned polyolefin sealing layer is between 20 micrometers (μm) and 80 micrometers (μm).
在本創作之一實施例中,其中前述耐熱樹脂層可為聚醯胺膜或聚酯膜。 In an embodiment of the present invention, the aforementioned heat resistant resin layer may be a polyamide film or a polyester film.
在本創作之一實施例中,其中前述耐熱樹脂層之厚度介於9微米(μm)至50微米(μm)之間。 In an embodiment of the present invention, the thickness of the aforementioned heat resistant resin layer is between 9 micrometers (μm) and 50 micrometers (μm).
10‧‧‧電池包裝膜 10‧‧‧Battery packaging film
11‧‧‧鋁箔層 11‧‧‧Aluminum foil layer
12‧‧‧第一黏著層 12‧‧‧First adhesive layer
13‧‧‧聚烯烴密封層 13‧‧‧Polyolefin sealant
14‧‧‧第二黏著層 14‧‧‧Second Adhesive Layer
15‧‧‧耐熱樹脂層 15‧‧‧Heat resistant resin layer
16‧‧‧熱傳感層 16‧‧‧Thermal sensing layer
第1圖係為本創作之一實施方式之電池包裝膜的剖面示意圖。 Fig. 1 is a schematic cross-sectional view showing a battery packaging film according to an embodiment of the present invention.
為了使本創作揭示內容的敘述更加詳盡與完備,下文針對了本創作的實施態樣與具體實施例提出了說明性的描述;但這並非實施或運用本創作具體實施例的唯一形式。以下所揭露的各實施例,在有益的情形下可相互組合或取代,也可在一實施例中附加其他的實施例,而無須進一步的記載或說明。 In order to make the description of the present disclosure more detailed and complete, the following description of the embodiments of the present invention and the specific embodiments are provided for illustrative purposes; however, this is not the only form of implementing or applying the specific embodiments of the present invention. The embodiments disclosed herein may be combined or substituted with each other in an advantageous manner, and other embodiments may be added to an embodiment without further description or description.
在以下描述中,將詳細敘述許多特定細節以使讀者能夠充分理解以下的實施例。然而,可在無此等特定細節之情況下實踐本創作之實施例。在其他情況下,為簡化圖式,熟知的結構與裝置僅示意性地繪示於圖中。 In the following description, numerous specific details are set forth However, embodiments of the present invention may be practiced without such specific details. In other instances, well-known structures and devices are only schematically shown in the drawings in order to simplify the drawings.
本創作之一目的係提供一種用於電池電性測試的電池包裝膜。 One of the aims of the present invention is to provide a battery packaging film for battery electrical testing.
請參照第1圖,係繪示根據本創作一實施方式之用於電池電性測試的電池包裝膜10之剖面示意圖。在此揭露之電池包裝膜10具有可簡化電性測試流程以及提高測試信賴度等優點。如第1圖所示,電池包裝膜10包含鋁箔層11、第一黏著層12、聚烯烴密封層13、第二黏著層14、耐熱樹脂層15以及熱傳感層16。第一黏著層12配置於鋁箔層11之一表面上,聚烯烴密封層13藉由第一黏著層12貼附於鋁箔層上11,第二黏著層14配置於鋁箔層11相對 於第一黏著層12之另一表面上,耐熱樹脂層15藉由第二黏著層14貼附於鋁箔層上11,熱傳感層16配置於耐熱樹脂層15之一表面上。 Referring to FIG. 1, a cross-sectional view of a battery packaging film 10 for battery electrical testing according to an embodiment of the present invention is shown. The battery packaging film 10 disclosed herein has the advantages of simplifying the electrical test procedure and improving the reliability of the test. As shown in FIG. 1, the battery packaging film 10 includes an aluminum foil layer 11, a first adhesive layer 12, a polyolefin sealing layer 13, a second adhesive layer 14, a heat resistant resin layer 15, and a heat sensing layer 16. The first adhesive layer 12 is disposed on one surface of the aluminum foil layer 11, and the polyolefin sealing layer 13 is attached to the aluminum foil layer 11 by the first adhesive layer 12. The second adhesive layer 14 is disposed on the aluminum foil layer 11 oppositely. On the other surface of the first adhesive layer 12, the heat resistant resin layer 15 is attached to the aluminum foil layer 11 by the second adhesive layer 14, and the heat sensing layer 16 is disposed on one surface of the heat resistant resin layer 15.
鋁箔層11係用以提供對於水氣、氧氣等之阻隔性,其材質一般為純鋁或可添加微量的鐵來增加鋁箔層11的加工性。為確保加工性及防止水氣或氧氣侵入的氣密性,鋁箔層11之厚度通常介於10~100微米(μm)之間。若鋁箔層11之厚度太薄,容易在成型時引起鋁箔破斷,或產生針孔,使得水氣或氧氣侵入之危險性增加。相對地,若鋁箔層11之厚度太厚,僅會造成包裝材料之總厚度變厚、重量增加及體積能量密度下降。在本創作之一實施例中,鋁箔層11之材質為含有2%鐵的軟質鋁箔。鋁箔層11之厚度約為40微米(μm)。 The aluminum foil layer 11 is used to provide barrier properties against moisture, oxygen, etc., and is generally made of pure aluminum or a small amount of iron may be added to increase the processability of the aluminum foil layer 11. The thickness of the aluminum foil layer 11 is usually between 10 and 100 micrometers (μm) in order to ensure processability and to prevent airtightness of moisture or oxygen intrusion. If the thickness of the aluminum foil layer 11 is too thin, it is easy to cause the aluminum foil to be broken or pinholes during molding, so that the risk of moisture or oxygen intrusion increases. In contrast, if the thickness of the aluminum foil layer 11 is too thick, only the total thickness of the packaging material becomes thick, the weight increases, and the volume energy density decreases. In one embodiment of the present invention, the material of the aluminum foil layer 11 is a soft aluminum foil containing 2% iron. The aluminum foil layer 11 has a thickness of about 40 micrometers (μm).
請復參照第1圖,第一黏著層12配置於鋁箔層11之一表面上。第一黏著層12之材料可以例如是但不限於聚烯烴樹脂、聚酯系樹脂、聚醚系樹脂、環氧系樹脂或其組合。第一黏著層12之厚度通常介於0.1微米(μm)至10微米(μm)之間,較佳係介於3微米(μm)至8微米(μm)之間。在本創作之一實施例中,第一黏著層12之材料為聚烯烴樹脂且第一黏著層12之厚度約為5微米(μm)。 Referring to FIG. 1, the first adhesive layer 12 is disposed on one surface of the aluminum foil layer 11. The material of the first adhesive layer 12 may be, for example but not limited to, a polyolefin resin, a polyester resin, a polyether resin, an epoxy resin, or a combination thereof. The thickness of the first adhesive layer 12 is typically between 0.1 micrometers (μm) and 10 micrometers (μm), preferably between 3 micrometers (μm) and 8 micrometers (μm). In one embodiment of the present invention, the material of the first adhesive layer 12 is a polyolefin resin and the thickness of the first adhesive layer 12 is about 5 micrometers (μm).
聚烯烴密封層13可藉由第一黏著層12貼附於鋁箔層11上。聚烯烴密封層13可以是單層之樹脂薄膜或是多層之樹脂薄膜,例如聚丙烯膜、聚乙烯膜、改質聚丙烯膜或是鑄塑聚丙烯(CPP)膜。聚烯烴密封層13具有熱密封性,可用以提高對於高腐蝕性的電解液之耐化學藥品性、提供足夠的熱封強度以及防止水氣入侵,以維持電解液的化學物性。為充分地防止針孔的產生以及減 少材料用量而降低生產成本,聚烯烴密封層13之厚度可介於20微米(μm)至80微米(μm)之間。在本創作之一實施例中,考量熱封性能及加工性,聚烯烴密封層13可以例如是三層結構的鑄塑聚丙烯(Cast polypropylene,CPP)膜且聚烯烴密封層13之厚度約為60微米(μm)。鑄塑聚丙烯膜之結構一般依序為貼合黏著層/中間層/熱封層,可利用三層共擠或共吹製程來成膜。貼合黏著層可以是加強黏著設計、沖壓性較好的無規共聚聚丙烯(Polypropylene random copolymer,PP-R)膜。中間層係用於強度支撐,可以是剛性好的均聚聚丙烯(Homo polypropylene,PP-H)膜。熱封層可以是熱封性能好、沖壓性好的無規共聚聚丙烯(Polypropylene random copolymer,PP-R)膜。但黏著層、中間層與熱封層的實施例不限於此。 The polyolefin sealing layer 13 can be attached to the aluminum foil layer 11 by the first adhesive layer 12. The polyolefin sealing layer 13 may be a single layer of a resin film or a multilayer resin film such as a polypropylene film, a polyethylene film, a modified polypropylene film or a cast polypropylene (CPP) film. The polyolefin sealing layer 13 has heat sealability and can be used to improve the chemical resistance of a highly corrosive electrolyte, provide sufficient heat seal strength, and prevent moisture intrusion to maintain the chemical properties of the electrolyte. In order to fully prevent the occurrence of pinholes and reduce The production cost of the polyolefin sealing layer 13 can be between 20 micrometers (μm) and 80 micrometers (μm) with less material usage and lower production costs. In one embodiment of the present invention, the heat sealing performance and processability are considered. The polyolefin sealing layer 13 may be, for example, a three-layer cast polypropylene (CPP) film and the thickness of the polyolefin sealing layer 13 is about 60 micrometers (μm). The structure of the cast polypropylene film is generally applied to the adhesive layer/intermediate layer/heat seal layer, and the film can be formed by a three-layer co-extrusion or co-blowing process. The adhesive layer may be a polypropylene polypropylene (polypropylene random copolymer, PP-R) film with enhanced adhesion and good punchability. The intermediate layer is used for strength support and may be a rigid Homo polypropylene (PP-H) film. The heat seal layer may be a polypropylene random copolymer (PP-R) film having good heat sealability and good punchability. However, embodiments of the adhesive layer, the intermediate layer, and the heat seal layer are not limited thereto.
第二黏著層14配置於鋁箔層11相對於第一黏著層12之另一表面上。第二黏著層14之材料可以例如是但不限於聚烯烴樹脂、聚酯系樹脂、聚醚系樹脂、環氧系樹脂或其組合。第二黏著層14之厚度通常介於0.1微米(μm)至10微米(μm)之間,較佳係介於5微米(μm)至8微米(μm)之間。在本創作之一實施例中,第二黏著層14之材料為聚酯系樹脂且第二黏著層14之厚度約為8微米(μm)。 The second adhesive layer 14 is disposed on the other surface of the aluminum foil layer 11 with respect to the first adhesive layer 12. The material of the second adhesive layer 14 may be, for example but not limited to, a polyolefin resin, a polyester resin, a polyether resin, an epoxy resin, or a combination thereof. The thickness of the second adhesive layer 14 is typically between 0.1 micrometers (μm) and 10 micrometers (μm), preferably between 5 micrometers (μm) and 8 micrometers (μm). In one embodiment of the present invention, the material of the second adhesive layer 14 is a polyester resin and the thickness of the second adhesive layer 14 is about 8 micrometers (μm).
耐熱樹脂層15藉由第二黏著層14貼附於鋁箔層11上,如第1圖所示。構成耐熱樹脂層15之材料為在熱封成形時不會因為熱封溫度而溶融的耐熱性樹脂。耐熱樹脂層15可以例如是聚醯胺膜或聚酯膜,其可以是單層膜或是複數層所形成之多層膜。考量作為包裝材之充分強度,以及提升成形性,耐熱樹脂層15之 厚度可介於9微米(μm)至50微米(μm)之間。在本創作之一實施例中,耐熱樹脂層15為聚醯胺膜且耐熱樹脂層15之厚度約為25微米(μm)。 The heat resistant resin layer 15 is attached to the aluminum foil layer 11 by the second adhesive layer 14, as shown in Fig. 1. The material constituting the heat resistant resin layer 15 is a heat resistant resin which does not melt at the heat sealing temperature at the time of heat sealing molding. The heat resistant resin layer 15 may be, for example, a polyamide film or a polyester film, which may be a single layer film or a multilayer film formed of a plurality of layers. Considering the sufficient strength of the packaging material and improving the formability, the heat resistant resin layer 15 The thickness can be between 9 micrometers (μm) and 50 micrometers (μm). In one embodiment of the present invention, the heat resistant resin layer 15 is a polyimide film and the heat resistant resin layer 15 has a thickness of about 25 micrometers (μm).
熱傳感層16配置於耐熱樹脂層15之一表面上,如第1圖所示。熱傳感層16之材料為一顏色可隨溫度而變化之物質,以指示溫度之變化,故熱傳感層16可依據溫度,透過顏色的變化來表現溫度的變化。在本創作之一實施例中,熱傳感層16在溫度變化指示方面係不可逆的。熱傳感層16在達到特定溫度後,例如高於預定溫度時,熱傳感層16會改變指示顏色,然而在顏色改變後並不會因溫度回到原始狀態而改變已變化的指示顏色恢復至原本的狀態。此外,熱傳感層16可視需要而具有兩種或以上程度之指示變量,亦即熱傳感層16可指示兩種或以上程度之溫度變化,其中,其指示顏色在兩種或以上不同溫度下變化,變化後之指示與變化前之指示有所區別,因而可以更詳盡的檢驗熱衝擊狀態。 The heat sensing layer 16 is disposed on one surface of the heat resistant resin layer 15, as shown in Fig. 1. The material of the thermal sensing layer 16 is a substance whose color can change with temperature to indicate the change of temperature, so the thermal sensing layer 16 can express the change of temperature according to the change of the color according to the temperature. In one embodiment of the present creation, the thermal sensing layer 16 is irreversible in terms of temperature change indication. After the thermal sensing layer 16 reaches a certain temperature, for example, above a predetermined temperature, the thermal sensing layer 16 changes the indicator color, but after the color change, the changed indicator color recovery is not changed due to the temperature returning to the original state. To the original state. In addition, the thermal sensing layer 16 may have two or more indicative variables as needed, that is, the thermal sensing layer 16 may indicate two or more degrees of temperature change, wherein the indicating color is at two or more different temperatures. Under the change, the indication after the change is different from the indication before the change, so that the thermal shock state can be examined in more detail.
在本創作之一實施例中,熱傳感層16係在耐熱樹脂層15上塗覆一不可逆感溫變色油墨所形成。不可逆感溫變色油墨為一種感溫塗料,其製自於一顏色在特定溫度改變之化合物,故感溫變色油墨具有一隨溫度變化之色調,因而使得使用者可藉由感溫變色油墨之顏色而辨別溫度的變化。感溫變色油墨可分為可逆感溫變色油墨以及不可逆感溫變色油墨。可逆感溫變色油墨其因加熱而改變顏色且在冷卻時回復原本的顏色。不可逆感溫變色油墨其因加熱而改變顏色但卻無法在冷卻時回復原本的顏色。在本創作中之一實施例中,熱傳感層16係在耐熱樹脂層15上塗覆不可逆的感溫變色油墨所形成,適合的塗覆方法可以是但不限於塗 佈法(coating)或印製法(printing)。熱傳感層16之厚度約介於5微米(μm)至150微米(μm)之間,較佳為介於20微米(μm)至40微米(μm)之間。 In one embodiment of the present invention, the heat sensing layer 16 is formed by coating an irreversible thermochromic ink on the heat resistant resin layer 15. The irreversible thermochromic ink is a temperature sensitive coating which is made from a compound whose color changes at a specific temperature, so that the thermochromic ink has a color tone which changes with temperature, thereby allowing the user to change the color of the ink by the thermochromic color. And identify the change in temperature. Thermochromic inks can be classified into reversible thermochromic inks and irreversible thermochromic inks. A reversible thermochromic ink that changes color due to heating and returns to its original color upon cooling. Irreversible thermochromic ink that changes color due to heating but does not return to its original color when cooled. In one embodiment of the present invention, the heat sensing layer 16 is formed by coating an irreversible thermochromic ink on the heat resistant resin layer 15, and a suitable coating method may be, but not limited to, coating. Coating or printing. The thickness of the thermal sensing layer 16 is between about 5 micrometers (μm) and 150 micrometers (μm), preferably between 20 micrometers (μm) and 40 micrometers (μm).
熱傳感層16可依電池所受之溫度而接受兩種或以上程度之指示變量,或有需要的話三種或以上程度之指示變量。在一般二次電池之電性測試結果中,當快速充放電時,電池之操作溫度高於60℃時已高於正常操作值,表示電池壽命較短,溫度高於70℃時電池將有短路的風險而應報廢。在本創作之一實施例中,熱傳感層16指示三種程度之溫度變化,在50℃以下時熱傳感層16顯示為透明無色,在55℃以上時熱傳感層16顯示為淡粉紅色,在65℃以上時熱傳感層16顯示為桃紅色。藉由熱傳感層16的設置,檢驗人員可直接以目視方式檢驗電池之操作溫度是否過熱,而無需額外配置溫度感應器以單點量測電池表面,且因熱傳感層16可顯示電池整體溫度區間,故亦可藉此精確檢驗出電池整體的熱衝擊狀況,進而改善製程問題。此外,可依不同產品檢驗需求調整熱傳感層16之材料以調整熱傳感層16之變色溫度,例如依電池之最大操作溫度、忍耐臨界溫度、或引起電池***和燃燒之溫度等,選擇具有相應變色溫度之感溫變色油墨以符合熱測試需求。此外,因熱傳感層16之變色為不可逆的,故經此檢驗之電池組可使下游客戶具有更高的信賴度。 The thermal sensing layer 16 can accept two or more levels of indicative variables depending on the temperature to which the battery is subjected, or three or more indicative variables, if desired. In the electrical test results of general secondary batteries, when the battery is operated at a temperature higher than 60 ° C, the operating temperature is higher than the normal operating value, indicating that the battery life is short, and the battery will be short-circuited when the temperature is higher than 70 ° C. The risk should be scrapped. In one embodiment of the present invention, the thermal sensing layer 16 indicates three levels of temperature change, the thermal sensing layer 16 is shown as being transparent and colorless below 50 ° C, and the thermal sensing layer 16 is shown as pale pink above 55 ° C. Color, the thermal sensing layer 16 is shown in pink when it is above 65 °C. By the arrangement of the thermal sensing layer 16, the inspector can directly visually check whether the operating temperature of the battery is overheated, without additionally configuring the temperature sensor to measure the surface of the battery at a single point, and the battery can be displayed by the thermal sensing layer 16. The overall temperature range can also be used to accurately check the thermal shock condition of the battery as a whole, thereby improving the process. In addition, the material of the thermal sensing layer 16 can be adjusted according to different product inspection requirements to adjust the color change temperature of the thermal sensing layer 16, for example, depending on the maximum operating temperature of the battery, the tolerance of the critical temperature, or the temperature at which the battery is exploded and burned. A thermochromic ink with a corresponding color change temperature to meet thermal testing requirements. In addition, since the discoloration of the thermal sensing layer 16 is irreversible, the battery pack thus tested can provide higher reliability to downstream customers.
本創作具有以下幾個優點: This creation has the following advantages:
1.本創作之用於電池電性測試的電池包裝膜可精確監控電池放電狀態時的電池整體溫度,而不僅限於溫度感應器之量測點溫度,且利用熱傳感層的顏色變化可使操作人員省去額外 的標示步驟並降低錯置風險。 1. The battery packaging film used in the battery electrical test can accurately monitor the overall temperature of the battery when the battery is discharged, and is not limited to the temperature of the temperature sensor, and the color change of the thermal sensing layer can be used. Operators save extra Mark the steps and reduce the risk of misplacement.
2.藉由顏色變化為不可逆的熱傳感層,可提高下游廠商或使用者對於電性測試結果的信賴度。 2. By changing the color to an irreversible thermal sensing layer, the reliability of downstream manufacturers or users for electrical test results can be improved.
3.因電池之過熱位置可被精確標示出,故可更明確的提供製程問題點,使製程上的問題被有效率的改善,進而降低不良品的產出。 3. Since the overheated position of the battery can be accurately marked, the process problem can be more clearly provided, so that the problem in the process can be effectively improved, thereby reducing the output of defective products.
雖然本創作已以實施方式揭露如上,然其並非用以限定本創作,任何熟習此技藝者,在不脫離本創作之精神和範圍內,當可作各種之更動與潤飾,因此本創作之保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.
10‧‧‧電池包裝膜 10‧‧‧Battery packaging film
11‧‧‧鋁箔層 11‧‧‧Aluminum foil layer
12‧‧‧第一黏著層 12‧‧‧First adhesive layer
13‧‧‧聚烯烴密封層 13‧‧‧Polyolefin sealant
14‧‧‧第二黏著層 14‧‧‧Second Adhesive Layer
15‧‧‧耐熱樹脂層 15‧‧‧Heat resistant resin layer
16‧‧‧熱傳感層 16‧‧‧Thermal sensing layer
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