Protective gummed paper, battery and electronic equipment
By using a two-layer adhesive tape structure in lithium-ion batteries, combined with a chemically inert organic polymer coating and a flame retardant coating, the problem of existing protective tape failing to mitigate short circuits in the event of needle puncture is solved, thereby improving the safety and stability of the battery.
Patent Information
- Application Number
- CN202422822305.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing protective adhesive tape cannot effectively mitigate internal short circuits in lithium-ion batteries when punctured abnormally, leading to safety hazards such as thermal runaway and explosion.
The device employs a two-layer adhesive tape structure, with one layer bonded to the battery cell and the other layer bonded to the aluminum-plastic film. The adhesive tape layers are coated with a chemically inert organic polymer and a flame retardant, forming a sandwich structure to reduce the contact area in the short-circuit region and prevent thermal runaway.
It effectively prevents internal short circuits and thermal runaway in the battery, improves battery safety, prevents fire or explosion, enhances the bonding stability between the battery cell and the aluminum-plastic film, and improves the flatness and impact resistance of the battery cell.
Smart Images
Figure CN223693170U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery equipment technical field, especially a kind of protective adhesive paper, battery and electronic equipment. BACKGROUND
[0002] Consumer lithium ion battery is widely used in the power supply of various mobile devices due to its high energy density, green environmental protection and other characteristics, in order to ensure the safety of lithium ion battery, generally need to be punctured to experiment.
[0003] When puncture test is carried out, steel needle generally penetrates the aluminum plastic film, protective adhesive paper and battery cell in turn, when puncture abnormality occurs, the positive and negative poles inside the battery are easy to short circuit, which causes the temperature inside the battery to rise sharply, and a large amount of heat accumulation will lead to thermal runaway, thus causing fire, explosion and other accidents. The existing protective adhesive paper is only used to simply bond the battery cell and the aluminum plastic film, and cannot effectively alleviate the short circuit inside the battery and prevent the battery from catching fire or exploding when puncture abnormality occurs. Therefore, the structure of the protective adhesive paper needs to be improved to improve the safety problem of the battery during puncture test. SUMMARY
[0004] The main purpose of the utility model is to provide a kind of protective adhesive paper, battery and electronic equipment, to solve the technical problem that the existing protective adhesive paper cannot effectively alleviate the short circuit inside the battery when puncture abnormality occurs.
[0005] To achieve the above purpose, the utility model provides a kind of protective adhesive paper, for bonding battery cell and aluminum plastic film, the protective adhesive paper includes:
[0006] First adhesive paper layer, the first adhesive paper layer has first side and second side oppositely arranged along the thickness direction, the first side is provided with first coating layer;
[0007] Second adhesive paper layer, the second adhesive paper layer and the first adhesive paper layer are stacked, the second adhesive paper layer has third side and fourth side oppositely arranged along the thickness direction, the third side is provided with second coating layer, the second coating layer and the first coating layer are oppositely arranged and contact each other;
[0008] Wherein, the first coating layer is chemical inert organic polymer coating, and the second coating layer is flame retardant coating;
[0009] Alternatively, the first coating layer is flame retardant coating, and the second coating layer is chemical inert organic polymer coating.
[0010] In some embodiments, the first side is a non-bonding surface, the second side is a bonding surface, the third side is a non-bonding surface, and the fourth side is a bonding surface;
[0011] The second side surface and the battery cell are bonded together, and the fourth side surface and the aluminum plastic film are bonded together.
[0012] In some embodiments, along the length direction of the first adhesive paper layer, the first coating layer extends from one end of the first side surface to the opposite end of the first side surface.
[0013] Along the length direction of the second adhesive paper layer, the second coating layer extends from one end of the third side surface to the opposite end of the third side surface.
[0014] In some embodiments, along the width direction of the first adhesive paper layer, the first coating layer extends from one end of the first side surface to the opposite end of the first side surface.
[0015] Along the width direction of the second adhesive paper layer, the second coating layer extends from one end of the third side surface to the opposite end of the third side surface.
[0016] In some embodiments, the aluminum plastic film is provided with a mounting slot, and the thickness D1 of the battery cell, the thickness D2 of the protective adhesive paper, and the slot depth D3 of the mounting slot satisfy: D1+2D2≤D3.
[0017] In some embodiments, the thickness D4 of the first adhesive paper layer and the thickness D5 of the second adhesive paper layer satisfy: D4=D5, the thickness D6 of the first coating layer and the thickness D4 of the first adhesive paper layer satisfy: D4≤D6≤1.5D4, and the thickness D7 of the second coating layer and the thickness D5 of the second adhesive paper layer satisfy: D5≤D7≤1.5D5.
[0018] In some embodiments, the size of the first adhesive paper layer and the size of the second adhesive paper layer are the same.
[0019] In some embodiments, the hot melt temperature T1 of the first coating layer satisfies: 90℃≤T1≤110℃.
[0020] Alternatively, the hot melt temperature T2 of the second coating layer satisfies: 90℃≤T2≤110℃.
[0021] Correspondingly, the utility model also proposes a battery, which comprises:
[0022] The protective adhesive paper in any of the above embodiments;
[0023] A battery cell is bonded to the second side surface of the first adhesive paper layer of the protective adhesive paper.
[0024] An aluminum plastic film is bonded to the fourth side surface of the second adhesive paper layer of the protective adhesive paper.
[0025] Correspondingly, the utility model also proposes an electronic device, including the battery of above-mentioned embodiment.
[0026] Compared with the prior art, the utility model has the advantages that:
[0027] In the technical scheme of the utility model, the first adhesive paper layer, the first coating layer, the second coating layer and the second adhesive paper layer form a sandwich structure, when the battery is subjected to the needle puncture test, the steel needle will successively puncture the aluminum plastic film, the protective adhesive paper and the battery core. In the process that the steel needle punctures the protective adhesive paper, the surface of the steel needle will attach the first coating layer and the second coating layer, and carry the first coating layer and the second coating layer to the inside of the battery core. At least one of the first coating layer and the second coating layer is a chemically inert organic polymer coating layer, and one is a flame retardant coating layer, the chemically inert organic polymer coating layer can reduce the contact area between the steel needle and the positive and negative electrode short circuit area in the battery core, relieve or disconnect the short circuit reaction in the battery core, and the flame retardant coating layer can block the occurrence of the thermal runaway condition of the battery core, effectively prevent the battery core from catching fire, explosion and other phenomena. Therefore, the first coating layer and the second coating layer that penetrate into the inside of the battery core can prevent the short circuit in the battery core and the thermal runaway of the battery core.
[0028] In addition, when the battery core occurs needle puncture abnormality, that is, the short circuit occurs in the battery core, the heat in the battery core will rise sharply, since the protective adhesive paper in the embodiment is pasted on the outside of the battery core, the heat generated by the battery core will be transmitted to the protective adhesive paper, and the first coating layer and the second coating layer in the protective adhesive paper will melt after being heated and flow into the battery core in a large amount through the hole of the steel needle puncture, relieve or disconnect the internal short circuit reaction, prevent the thermal runaway condition of the battery core, prevent the battery core from catching fire or even explosion, and ensure the safety of the needle puncture test.
[0029] The protective adhesive paper provided by the utility model has two adhesive paper layers, which are the first adhesive paper layer and the second adhesive paper layer, one of which is bonded to the battery core, and the other of which is bonded to the aluminum plastic film. By arranging two adhesive paper layers between the battery core and the aluminum plastic film, the adhesion stability between the battery core and the aluminum plastic film can be improved, the battery core can be prevented from shifting in the aluminum plastic film shell, the battery core can be prevented from being damaged or deformed, the overall flatness of the battery core can be improved, and the use safety performance of the battery core can be further improved. At the same time, the two adhesive paper layers can provide double-layer protection for the battery core and improve the anti-impact performance of the battery core.
[0030] The battery using the protective adhesive paper has good needle puncture resistance, can prevent and timely prevent the battery from short circuit and thermal runaway during the needle puncture test, and improves the safety of the battery during the needle puncture test.
[0031] The electronic device using the battery has high use safety performance. BRIEF DESCRIPTION OF DRAWINGS
[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.
[0033] Figure 1 The structural section view of the protective adhesive paper provided by an embodiment of the present application along the length direction thereof is shown in the figure.
[0034] Figure 2 The structural section view of the protective adhesive paper provided by an embodiment of the present application along the width direction thereof is shown in the figure.
[0035] Figure 3 The structural parameter schematic diagram of the protective adhesive paper provided by an embodiment of the present application is shown in the figure.
[0036] Figure 4 The structural section view of the battery provided by an embodiment of the present application is shown in the figure.
[0037] Explanation of the reference signs in the drawings:
[0038] 10, protective adhesive paper;
[0039] 100, first adhesive paper layer;
[0040] 110, first side surface; 120, second side surface;
[0041] 200, second adhesive paper layer;
[0042] 210, third side surface; 220, fourth side surface;
[0043] 300, first coating layer;
[0044] 400, second coating layer;
[0045] 20, battery cell;
[0046] 30, aluminum plastic film.
[0047] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION
[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.
[0050] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the entire text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.
[0051] Consumer lithium ion batteries are widely used as power sources for various mobile devices due to their high energy density, green environmental protection and other characteristics. In order to ensure the safety of lithium ion batteries, a needle test is generally required for the battery.
[0052] During the needle test, the steel needle generally penetrates the aluminum plastic film, the protective paper and the cell of the battery in turn. When a needle puncture anomaly occurs, the positive and negative electrodes inside the battery are prone to short circuit, which causes the temperature inside the battery to rise sharply. A large amount of heat accumulation will cause thermal runaway, thereby causing fire, explosion and other accidents. The existing protective paper can only be used to simply bond the cell and the aluminum plastic film, and cannot effectively alleviate the short circuit inside the battery and prevent the battery from catching fire or exploding when a needle puncture anomaly occurs. Therefore, the structure of the protective paper needs to be improved to improve the safety problem of the battery during the needle test.
[0053] Therefore, in order to solve the technical problem that the existing protective paper 10 cannot effectively alleviate the short circuit inside the battery when a needle puncture anomaly occurs, with reference to Figures 1 to 4The utility model discloses an embodiment provides a kind of protective adhesive paper 10, the protective adhesive paper 10 is used to bond battery cell 20 and aluminum plastic film 30, the protective adhesive paper 10 includes first adhesive paper layer 100 and second adhesive paper layer 200.First adhesive paper layer 100 has the first side 110 and the second side 120 of opposite arrangement along the thickness direction, first side 110 is provided with first coating layer 300, second adhesive paper layer 200 and first adhesive paper layer 100 are stacked, second adhesive paper layer 200 has the third side 210 and the fourth side 220 of opposite arrangement along the thickness direction, third side 210 is provided with second coating layer 400, second coating layer 400 and first coating layer 300 are opposite and contact each other.Wherein, first coating layer 300 is chemical inert organic polymer coating, and second coating layer 400 is flame retardant coating.Or, first coating layer 300 is flame retardant coating, and second coating layer 400 is chemical inert organic polymer coating.
[0054] Specifically, in the embodiment, first adhesive paper layer 100, first coating layer 300, second coating layer 400 and second adhesive paper layer 200 form sandwich structure, when carrying out needle test to battery, steel needle will successively pierce aluminum plastic film 30, protective adhesive paper 10 and battery cell 20.In the process that steel needle pierces protective adhesive paper 10, the surface of steel needle will be attached first coating layer 300 and second coating layer 400, and carries first coating layer 300 and second coating layer 400 to the inside of battery cell 20.At least one of first coating layer 300 and second coating layer 400 is chemical inert organic polymer coating, and one is flame retardant coating, and chemical inert organic polymer coating can reduce the contact area of steel needle and positive and negative pole short-circuit area in battery cell 20, alleviate or disconnect short-circuit reaction in battery cell 20, and flame retardant coating can block the occurrence of thermal runaway of battery cell 20, effectively prevent the phenomenon such as fire, explosion of battery cell 20.Therefore, first coating layer 300 and second coating layer 400 that pierce into the inside of battery cell 20 can prevent short-circuit in battery cell 20 and thermal runaway of battery cell 20.
[0055] In addition, when battery cell 20 occurs needle test anomaly, i.e. short-circuit occurs in battery cell 20, the heat in battery cell 20 will sharply rise, since the protective adhesive paper 10 in the embodiment is pasted to the outside of battery cell 20, so the heat generated by battery cell 20 will be transferred to protective adhesive paper 10, and first coating layer 300 and second coating layer 400 in protective adhesive paper 10 will melt after being heated, and flow into battery cell 20 in large quantities through the hole of steel needle puncture, alleviate or disconnect internal short-circuit reaction, prevent thermal runaway of battery cell 20, prevent battery cell 20 from fire even explosion, guarantee the safety of needle test.
[0056] The protective adhesive paper 10 provided by the embodiment has two adhesive paper layers, namely a first adhesive paper layer 100 and a second adhesive paper layer 200, one of which is bonded to the battery cell 20 and the other of which is bonded to the aluminum plastic film 30. By arranging two adhesive paper layers between the battery cell 20 and the aluminum plastic film 30, the bonding stability between the battery cell 20 and the aluminum plastic film 30 can be improved, the battery cell 20 can be prevented from being offset in the aluminum plastic film 30 shell, the battery cell 20 can be prevented from being damaged or deformed, the overall flatness of the battery cell 20 can be improved, and the use safety performance of the battery cell 20 can be further improved. At the same time, the two adhesive paper layers can provide double-layer protection for the battery cell 20 and improve the anti-impact performance of the battery cell 20.
[0057] The chemically inert organic polymer coating can be selected from a silicone polymer coating, a polytetrafluoroethylene coating, a polyimide coating, and the like. The flame retardant coating can be selected from a magnesium hydroxide coating, an aluminum hydroxide coating, a halogen-based flame retardant coating (such as a brominated flame retardant), a phosphorus-based flame retardant coating (such as red phosphorus, yellow phosphorus), a nitrogen-based flame retardant coating (such as ammonium polyphosphate), and the like.
[0058] In some embodiments, with reference to Figure 1 , Figure 2 and Figure 4 , the first side surface 110 is a non-bonding surface, the second side surface 120 is a bonding surface, the third side surface 210 is a non-bonding surface, and the fourth side surface 220 is a bonding surface. The second side surface 120 is bonded to the battery cell 20, and the fourth side surface 220 is bonded to the aluminum plastic film 30.
[0059] Specifically, in the embodiment, along the thickness direction of the protective adhesive paper 10, the outermost two side surfaces of the protective adhesive paper 10 are bonding surfaces, one of the bonding surfaces of the protective adhesive paper 10 is bonded to the battery cell 20 (for example, the second side surface 120 as a bonding surface can be bonded to the battery cell 20, or the fourth side surface 220 as a bonding surface can be bonded to the battery cell 20), and the other of the bonding surfaces of the protective adhesive paper 10 is bonded to the aluminum plastic film 30 (for example, the fourth side surface 220 as a bonding surface can be bonded to the aluminum plastic film 30, or the second side surface 120 as a bonding surface can be bonded to the aluminum plastic film 30). Through the bonding effect of the protective adhesive paper 10, the battery cell 20 can be stably bonded to the aluminum plastic film 30, so that the overall flatness of the battery cell 20 can be improved, the battery cell 20 can be prevented from being shaken in the aluminum plastic film 30 due to poor bonding between the battery cell 20 and the aluminum plastic film 30, the battery cell 20 can be prevented from being damaged or deformed due to being shaken and impacted, and the use safety performance of the battery cell 20 can be further improved.
[0060] The first coating layer 300 can be rolled to the first side 110, and the second coating layer 400 can be rolled to the third side 210. Since the first side 110 and the third side 210 are both non-adhesive surfaces, when the battery is subjected to the needle test, the first coating layer 300 and the second coating layer 400 can easily adhere to the steel needle, and the first coating layer 300 and the second coating layer 400 can be carried into the battery cell 20 by the steel needle to reduce the short-circuit points between the positive and negative electrode sheets in the battery cell 20, reduce the probability of short-circuit in the battery cell 20, and block the thermal runaway in the battery cell 20 by the first coating layer 300 or the second coating layer 400. When the battery cell 20 has an internal short circuit, a large amount of heat will accumulate in the battery cell 20. The first coating layer 300 and the second coating layer 400 will melt after being heated and easily flow into the battery cell 20 along the steel needle hole, so that the first coating layer 300 and the second coating layer 400 form a protective layer on the surface of the positive and negative electrode sheets in the battery cell 20, relieve or break the short-circuit reaction in the battery cell 20 (mainly by the chemical inert organic polymer coating to relieve or break the short-circuit reaction in the battery cell 20), and block the occurrence of thermal runaway in the battery cell 20, effectively avoiding the burning and explosion of the battery cell 20 (mainly by the flame retardant coating to block the occurrence of thermal runaway in the battery cell 20), thereby effectively ensuring the safety of the needle test.
[0061] In some embodiments, referring to Figure 1 and Figure 2 , along the length direction of the first adhesive paper layer 100, the first coating layer 300 extends from one end of the first side 110 to the other end of the first side 110 opposite to the one end. Along the length direction of the second adhesive paper layer 200, the second coating layer 400 extends from one end of the third side 210 to the other end of the third side 210 opposite to the one end.
[0062] Meanwhile, along the width direction of the first adhesive paper layer 100, the first coating layer 300 extends from one end of the first side 110 to the other end of the first side 110 opposite to the one end. Along the width direction of the second adhesive paper layer 200, the second coating layer 400 extends from one end of the third side 210 to the other end of the third side 210 opposite to the one end.
[0063] Specifically, in the present embodiment, the first coating layer 300 covers the entire first side 110, and the second coating layer 400 covers the entire third side 210. With the above structure, when the battery is subjected to the needle test, no matter which position of the battery is punctured by the steel needle, the first coating layer 300 and the second coating layer 400 can be contacted and carried into the battery cell 20, so as to realize the function of the first coating layer 300 and the second coating layer 400 in reducing the short-circuit points in the battery cell 20 or blocking the thermal runaway in the battery cell 20.
[0064] The coating area of the first coating layer 300 and the size of the first side surface 110 are consistent, the coating area of the second coating layer 400 and the size of the third side surface 210 are consistent, which is more conducive to the roll forming of the first coating layer 300 on the first side surface 110 and the roll forming of the second coating layer 400 on the third side surface 210, thereby reducing the processing difficulty of the protective paper 10.
[0065] In some embodiments, referring to Figure 4 , the aluminum plastic film 30 is provided with a mounting groove, and the thickness D1 of the battery cell 20, the thickness D2 of the protective paper 10, and the groove depth D3 of the mounting groove satisfy: D1 + 2D2 ≤ D3.
[0066] Specifically, in the present embodiment, the battery cell 20 is bonded in the mounting groove of the aluminum plastic film 30 through the protective paper 10, so as to realize the packaging of the battery cell 20 in the aluminum plastic film 30. Therefore, the overall thickness of the battery cell 20 and the protective paper 10 should not be too thick, that is, the overall thickness of the battery cell 20 and the protective paper 10 should not be too thick, otherwise the aluminum plastic film 30 cannot effectively package the battery cell 20. At the same time, the overall thickness of the battery cell 20 and the protective paper 10 should not be too thin, so as to ensure that the battery cell 20 can be clamped in the mounting groove (the battery cell 20 is also bonded in the mounting groove through the protective paper 10), prevent the battery cell 20 from loosening in the mounting groove, and ensure the overall flatness of the battery cell 20. In addition, matching the overall thickness of the battery cell 20 and the protective paper 10 with the groove depth of the mounting groove is conducive to improving the energy density of the battery and prolonging the endurance of the battery.
[0067] In some embodiments, referring to Figure 3 , the thickness D4 of the first paper layer 100 and the thickness D5 of the second paper layer 200 satisfy: D4 = D5, the thickness D6 of the first coating layer 300 and the thickness D4 of the first paper layer 100 satisfy: D4 ≤ D6 ≤ 1.5D4, and the thickness D7 of the second coating layer 400 and the thickness D5 of the second paper layer 200 satisfy: D5 ≤ D7 ≤ 1.5D5. For example, the value of D6 can be D4, 1.2D4, 1.5D4, etc., and the value of D7 can be D5, 1.2D5, 1.5D5, etc.
[0068] Specifically, in the present embodiment, by adopting the above range limitation, on the one hand, the thickness of the first coating layer 300 and the second coating layer 400 is prevented from being too thin, and when the internal short circuit of the battery cell 20 occurs, the amount of the first coating layer 300 and the second coating layer 400 flowing into the battery cell 20 is insufficient, which causes the first coating layer 300 or the second coating layer 400 to be unable to effectively cover the short circuit point between the positive and negative electrode sheets in the battery cell 20, alleviate or break the short circuit reaction in the battery cell 20, and cause the first coating layer 300 or the second coating layer 400 to be unable to effectively block the occurrence of thermal runaway of the battery cell 20, thereby preventing the battery cell 20 from catching fire, explosion and the like. On the other hand, the thickness of the first coating layer 300 and the second coating layer 400 is prevented from being too thick, which causes the energy density of the battery to be reduced and the endurance of the battery to be shortened.
[0069] In some embodiments, the size of the first adhesive paper layer 100 and the size of the second adhesive paper layer 200 are the same, so as to ensure the regularity of the protective adhesive paper 10 and facilitate the pasting of the protective adhesive paper 10 between the battery cell 20 and the aluminum plastic film 30.
[0070] In some embodiments, the heat melting temperature T1 of the first coating layer 300 satisfies: 90℃≤T1≤110℃. Alternatively, the heat melting temperature T2 of the second coating layer 400 satisfies: 90℃≤T2≤110℃. For example, the values of T1 and T2 can be 90℃, 95℃, 100℃, 105℃, 110℃ and the like.
[0071] Specifically, in the present embodiment, the heat melting temperature of the first coating layer 300 and the second coating layer 400 is not too high, otherwise when the internal short circuit of the battery cell 20 occurs, the heat generated by the battery cell 20 is not enough to melt the first coating layer 300 and the second coating layer 400, which causes the first coating layer 300 and the second coating layer 400 to be unable to flow into the battery cell 20 in time, so that the first coating layer 300 and the second coating layer 400 are unable to control the short circuit condition of the battery cell 20 and the heating condition of the battery cell 20 in time, which affects the safety performance of the battery cell 20. The heat melting temperature of the first coating layer 300 and the second coating layer 400 is also not too low, otherwise the first coating layer 300 and the second coating layer 400 may be melted at room temperature or slightly higher temperature, which causes the first coating layer 300 and the second coating layer 400 to be easily invalid, which also affects the safety performance of the battery cell 20.
[0072] Correspondingly, another embodiment of the utility model also provides a battery, which refers to Figure 4The battery includes the protective adhesive paper 10 in any of the above embodiments, and further includes a battery cell 20 and an aluminum plastic film 30.
[0073] Specifically, in the embodiment, the battery using the protective adhesive paper 10 has good anti-penetration performance, can prevent and timely prevent the battery from being internally short-circuited and thermal runaway during the penetration test, and improves the safety of the battery during the penetration test.
[0074] Correspondingly, the utility model discloses another embodiment further provides an electronic equipment, and the electronic equipment includes the battery in the above embodiment.
[0075] Specifically, in the embodiment, the electronic equipment using the battery has higher use safety performance.
[0076] Thanks to the improvement of the protective adhesive paper 10, the battery and the electronic equipment of the embodiment have the same technical effects as the protective adhesive paper 10, which will not be repeated here.
[0077] It should be noted that other contents of the protective adhesive paper 10, the battery and the electronic equipment disclosed in the utility model can be referred to the prior art, which will not be repeated here.
[0078] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.
Claims
1. A protective adhesive paper, characterized in that, A protective tape for bonding a battery cell and an aluminum-plastic film, the protective tape comprising: a first tape layer having a first side and a second side oppositely arranged along a thickness direction, the first side being provided with a first coating layer; a second tape layer stacked with the first tape layer, the second tape layer having a third side and a fourth side oppositely arranged along a thickness direction, the third side being provided with a second coating layer, the second coating layer being oppositely arranged with the first coating layer and in contact with each other; wherein the first coating layer is a chemically inert organic polymer coating layer, and the second coating layer is a flame retardant coating layer; or, the first coating layer is a flame retardant coating layer, and the second coating layer is a chemically inert organic polymer coating layer.
2. The protective tape according to claim 1, wherein the first side is a non-bonding surface, the second side is a bonding surface, the third side is a non-bonding surface, and the fourth side is a bonding surface; wherein the second side is bonded with the battery cell, and the fourth side is bonded with the aluminum-plastic film.
3. The protective tape of claim 1, wherein along a length direction of the first tape layer, the first coating layer extends from one end of the first side to the opposite end of the first side; along a length direction of the second tape layer, the second coating layer extends from one end of the third side to the opposite end of the third side.
4. The protective tape of claim 1, wherein along a width direction of the first tape layer, the first coating layer extends from one end of the first side to the opposite end of the first side; along a width direction of the second tape layer, the second coating layer extends from one end of the third side to the opposite end of the third side.
5. The protective tape of claim 1, wherein the aluminum-plastic film is provided with a mounting slot, and a thickness D1 of the battery cell, a thickness D2 of the protective tape, and a slot depth D3 of the mounting slot satisfy: D1 + 2D2 ≤ D3.
6. The protective tape of claim 1, wherein a thickness D4 of the first tape layer and a thickness D5 of the second tape layer satisfy: D4 = D5, a thickness D6 of the first coating layer and the thickness D4 of the first tape layer satisfy: D4 ≤ D6 ≤ 1.5D4, and a thickness D7 of the second coating layer and the thickness D5 of the second tape layer satisfy: D5 ≤ D7 ≤ 1.5D5.
7. The protective tape of claim 1, wherein the first tape layer and the second tape layer have the same size.
8. The protective tape according to any one of claims 1 to 7, wherein a hot melting temperature T1 of the first coating layer satisfies: 90℃ ≤ T1 ≤ 110℃; or, a hot melting temperature T2 of the second coating layer satisfies: 90℃ ≤ T2 ≤ 110℃.
9. A battery characterized by comprising: the protective tape according to any one of claims 1 to 8; a battery cell bonded to the second side of the first tape layer of the protective tape; an aluminum-plastic film bonded to the fourth side of the second tape layer of the protective tape.
10. An electronic device, characterized by the battery according to claim 9.