Leakage detection adhesive tape and battery with same

Abstract

The utility model relates to the technical field of battery detection, and discloses a liquid leakage detection adhesive tape and a battery with the liquid leakage detection adhesive tape. The color developing layer is arranged on the substrate layer, the color developing layer is provided with a binding agent and a color changing material, the binding agent of the color developing layer is used for being bonded with a shell of the battery, the color changing material of the color developing layer changes color when making contact with electrolyte of the battery, the color developing layer comprises a first testing area, and a plurality of first stripping parts are arranged in the first testing area; from the center of the first test area to the edge of the first test area, the plurality of first stripping parts are arranged in sequence, and any two adjacent first stripping parts are separably connected. The liquid leakage detection adhesive tape disclosed by the embodiment of the utility model has the advantage of wide application range.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a liquid leakage detection tape and a battery having the same. Background Art

[0002] A battery includes a housing and an electrolyte, and the electrolyte is located inside the housing. In order to test the airtightness of the housing, a test paper is usually provided on the outer side of the housing. When the test paper comes into contact with the electrolyte, it changes color and can be detected when the electrolyte leaks.

[0003] In the related art, holes are usually directly provided on the test paper, and an explosion-proof valve or a pole passes through the holes to enable the test paper to detect whether there is liquid leakage at the edge of the explosion-proof valve or the pole. However, the shape of the holes cannot be changed, resulting in that the test paper can only be adapted to a single battery and has a small application range. Summary of the Utility Model

[0004] In view of this, the utility model provides a liquid leakage detection tape and a battery having the same to solve the problem of small application range.

[0005] In a first aspect, the utility model provides a liquid leakage detection tape, including: a base layer; a color-developing layer provided on the base layer, the color-developing layer being provided with an adhesive and a color-changing material. The adhesive of the color-developing layer is used for bonding with the housing of the battery, and the color-changing material of the color-developing layer changes color when coming into contact with the electrolyte of the battery. The color-developing layer includes a first test area, and a plurality of first peeling parts are provided in the first test area. From the center of the first test area to the edge of the first test area, the plurality of first peeling parts are arranged in sequence, and any two adjacent first peeling parts are separably connected.

[0006] Beneficial effects: By providing the base layer, the color-developing layer can be attached to the base layer, which is convenient for bonding the color-developing layer to the battery. And when the battery leaks liquid, the base layer can prevent the electrolyte from spreading around to ensure that the electrolyte can fully contact with the color-developing layer, and the color-developing layer can display the color more accurately to more accurately judge whether the battery leaks liquid. By providing a plurality of first peeling parts, different first peeling parts can be selected according to the shape and size of the area to be detected on the battery, so that the display layer surrounds the area to be detected and detects whether there is liquid leakage at the edge of the area to be detected. This can not only improve the detection accuracy but also detect batteries with different structures, improving the application range of the liquid leakage detection tape.

[0007] In an alternative embodiment, the base layer includes a first perforable area, in which a plurality of first perforable parts are provided. From the center to the edge of the first perforable area, the plurality of first perforable parts are arranged in sequence, and any two adjacent first perforable parts are separably connected. The plurality of first perforable parts and the plurality of first peeling parts are arranged in one-to-one correspondence.

[0008] Advantageous effects: By providing a plurality of first perforable parts, it is possible to select different first perforable parts to be peeled off according to the shape and size of the area to be detected on the battery, so that the base layer surrounds the area to be detected. When the electrolyte leaks at the edge of the area to be detected, it can not only effectively prevent the electrolyte from spreading around, improve the accuracy of detection, but also detect batteries with different structures, improve the applicable range of the liquid leakage detection tape, and avoid the gap between the color display layer and the battery due to the area to be detected abutting against the base layer, further improving the tightness of the fit between the color display layer and the battery and making the detection more accurate.

[0009] In an alternative embodiment, the color display layer further includes: a second test area, which is spaced from the first test area. A plurality of second peeling parts are provided in the second test area. From the center to the edge of the second test area, the plurality of second peeling parts are arranged in sequence, and any two adjacent second peeling parts are separably connected.

[0010] Advantageous effects: By providing a plurality of second peeling parts, it is possible to select different second peeling parts to be peeled off according to the shape and size of the area to be detected on the battery, so that the display layer surrounds the area to be detected and detect whether the edge of the area to be detected leaks. It can not only improve the accuracy of detection, but also detect batteries with different structures, improving the applicable range of the liquid leakage detection tape. In addition, by providing the second test area and cooperating with the first test area, the liquid leakage detection tape can simultaneously detect the pole column and the explosion-proof valve on the same side of the battery, improving the detection efficiency.

[0011] In an alternative embodiment, the color display layer includes two second test areas, and the second test areas are located on opposite sides of the first test area.

[0012] Advantageous effects: When the explosion-proof valve and the two pole columns are on the same side of the battery, the liquid leakage detection tape can simultaneously detect the explosion-proof valve and the two pole columns for liquid leakage, further improving the detection efficiency. And when the explosion-proof valve and one pole column are on the same side of the battery and the other pole column is on the other side of the battery, the liquid leakage detection tape is still applicable, and the applicable range of the liquid leakage detection tape is also improved, and the application scenarios of the liquid leakage detection tape are more.

[0013] In an alternative embodiment, the outer contours of at least two of the plurality of first peeling portions have the same shape; and / or the outer contours of at least two of the plurality of first peeling portions have different shapes; and / or the outer contours of at least two of the plurality of second peeling portions have the same shape; and / or the outer contours of at least two of the plurality of second peeling portions have the same shape.

[0014] Advantageous effects: The structures of the plurality of first peeling portions are more diverse, and the shape of the first peeling portion can be adjusted according to the usage requirements. The structures of the plurality of second peeling portions are more diverse, and the shape of the second peeling portion can be adjusted according to the usage requirements, improving the application range of the liquid leakage detection tape.

[0015] In an alternative embodiment, the base layer includes a second openable area, and a plurality of second openable portions are provided in the second openable area. From the center of the second openable area to the edge of the second openable area, the plurality of second openable portions are arranged in sequence, and any two adjacent second openable portions are separably connected. The plurality of second openable portions and the plurality of second peeling portions are arranged in one-to-one correspondence.

[0016] Advantageous effects: By providing a plurality of second openable portions, different second openable portions can be selected for peeling according to the shape and size of the area to be detected on the battery, so that the base layer surrounds the area to be detected. Not only can it effectively prevent the electrolyte from diffusing around when there is liquid leakage at the edge of the area to be detected, improving the detection accuracy, but also it can detect batteries with different structures, improving the application range of the liquid leakage detection tape. It can also avoid the gap between the color display layer and the battery caused by the area to be detected abutting against the base layer, further improving the tightness between the color display layer and the battery and making the detection more accurate.

[0017] In an alternative embodiment, the color display layer further includes a matrix area, and the outermost first peeling portion is separably connected to the matrix area, and the outermost second peeling portion is separably connected to the matrix area.

[0018] Advantageous effects: By providing the matrix area, the first test area, the second test area and the matrix area can be connected into an integral structure. At this time, the color display layer is an integral structure, so that the color display layer is convenient for processing and manufacturing, and the production efficiency of the liquid leakage detection tape is higher.

[0019] In an alternative embodiment, the base layer is configured as a transparent structure; and / or the elongation rate of the base layer is not less than 35%.

[0020] Beneficial effects: During detection, it is possible to directly observe with the naked eye from the base layer whether the color on the color-developing layer changes, making the observation more convenient. The base layer can adapt to the shapes of the pole post and the explosion-proof valve to ensure the fitting between the color-developing layer and the battery housing, which can prevent the color-developing layer from being interfered by external substances and changing color, thereby improving the accuracy of the detection results.

[0021] In an optional embodiment, the discoloring material includes one or more of thymol blue, methyl yellow, methyl orange, bromophenol blue, bromocresol green, methyl red, bromothymol blue, neutral red, phenol red, phenolphthalein, thymolphthalein, litmus.

[0022] Beneficial effects: There are many construction methods for the discoloring material, which is beneficial for being applicable to different types of batteries.

[0023] In a second aspect, the present utility model further provides a battery, including: a housing; an electrolyte disposed within the housing; and the leakage detection tape according to the first aspect, wherein the leakage detection tape is connected to the outer surface of the housing.

[0024] Beneficial effects: The leakage detection tape can always detect whether the battery leaks, with higher safety and more timely feedback. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a cross-sectional view of the leakage detection tape according to the embodiment of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the base layer according to the embodiment of the present utility model;

[0028] Figure 3 It is a schematic structural diagram of the color-developing layer according to the embodiment of the present utility model;

[0029] Figure 4 It is a schematic connection diagram of the cover plate, the pole post and the explosion-proof valve of the housing.

[0030] Description of the Reference Numerals in the Drawings:

[0031] 1. Leakage detection tape; 2. Cover plate; 3. Pole post; 4. Explosion-proof valve;

[0032] 100, Base layer; 110, First openable area; 111, First openable part; 120, Second openable area; 121, Second openable part; 130, Main body area;

[0033] 200, Color display layer; 210, First test area; 211, First peeling part; 220, Second test area; 221, Second peeling part; 230, Substrate area. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0036] In the description of the present utility model, "a plurality of" means two or more. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] The following combines Figures 1 to 3 , to describe the embodiments of the present utility model.

[0039] According to an embodiment of the present invention, on the one hand, a liquid leakage detection tape 1 is provided. The liquid leakage detection tape 1 includes a base layer 100 and a color-developing layer 200.

[0040] The color-developing layer 200 is provided on the base layer 100. The color-developing layer 200 is provided with an adhesive and a color-changing material. The adhesive of the color-developing layer 200 is used to bond with the housing of the battery. When the color-changing material of the color-developing layer 200 comes into contact with the electrolyte of the battery, it changes color. The color-developing layer 200 includes a first test area 210. A plurality of first peeling portions 211 are provided in the first test area 210. From the center of the first test area 210 to the edge of the first test area 210, the plurality of first peeling portions 211 are arranged in sequence, and any two adjacent first peeling portions 211 are separably connected.

[0041] For example, the color-changing material can be an acid-base indicator, and the color-changing material can include one or more components such as thymol blue, methyl yellow, methyl orange, bromophenol blue, bromocresol green, methyl red, bromothymol blue, neutral red, phenol red, phenolphthalein, thymolphthalein, litmus, etc. After the liquid leakage detection tape 1 is connected to the housing of the battery, if the electrolyte leaks from the housing and comes into contact with the liquid leakage detection tape 1, the color-developing layer 200 will change color, so it can be known whether the battery leaks liquid.

[0042] Moreover, between two adjacent first peeling portions 211, they can be integrally separated or partially separated by means such as pre-cutting or punching.

[0043] By providing the base layer 100, the color-developing layer 200 can be attached to the base layer 100, which is convenient for bonding the color-developing layer 200 to the housing of the battery. And when the battery leaks liquid, the base layer 100 can prevent the electrolyte from diffusing around, so as to ensure that the electrolyte can fully contact the color-developing layer 200, and the color-developing layer 200 can display the color more accurately to more accurately judge whether the battery leaks liquid.

[0044] Wherein, the base layer 100 can be made of a flexible material. The base layer 100 is prone to deformation, so that the liquid leakage detection tape 1 can adapt to the shape of the battery, ensuring a tight fit between the liquid leakage detection tape 1 and the battery. The thickness of the base layer 100 can be made slightly thinner to improve the deformation efficiency.

[0045] For example, the base layer 100 can be made of one or more materials such as biaxially oriented polypropylene film (BOPP), polyvinyl chloride (PVC), polyethylene glycol terephthalate (PET), and polyethylene (PE).

[0046] By providing the first test area 210, when the liquid leakage detection tape 1 is connected to the battery, the position of the first test area 210 can be correspondingly set with respect to the position of the explosion-proof valve 4, the terminal 3 or the liquid injection port on the battery. For example, when the position of the first test area 210 corresponds to that of the explosion-proof valve 4, at least one of the plurality of first peeling portions 211 can be peeled off according to the shape and size of the explosion-proof valve 4, so that the color display layer 200 can surround the explosion-proof valve 4 to detect whether there is liquid leakage at the connection position between the explosion-proof valve 4 and the housing; when the position of the first test area 210 corresponds to that of the terminal 3, at least one of the plurality of first peeling portions 211 can be peeled off according to the shape and size of the terminal 3, so that the color display layer 200 can surround the terminal 3 to detect whether there is liquid leakage at the connection position between the terminal 3 and the housing; when the position of the first test area 210 corresponds to that of the liquid injection port, at least one of the plurality of first peeling portions 211 can be peeled off according to the shape and size of the liquid injection port, so that the color display layer 200 can surround the liquid injection port to detect whether there is liquid leakage at the connection position between the liquid injection port and the housing.

[0047] By providing a plurality of first peeling portions 211, different first peeling portions 211 can be selectively peeled off according to the different shapes and sizes of the areas to be detected on the battery, so that the display layer surrounds the area to be detected to detect whether there is liquid leakage at the edge of the area to be detected. This not only improves the detection accuracy but also enables the detection of batteries with different structures, thereby increasing the applicable range of the liquid leakage detection tape 1.

[0048] As Figure 2 shown, in the technical solution of this embodiment, the base layer 100 includes a first perforable area 110. A plurality of first perforable portions 111 are provided in the first perforable area 110. From the center of the first perforable area 110 to the edge of the first perforable area 110, the plurality of first perforable portions 111 are arranged in sequence. Any two adjacent first perforable portions 111 are separably connected. The plurality of first perforable portions 111 and the plurality of first peeling portions 211 are provided in a one-to-one correspondence.

[0049] For example, between two adjacent first perforable portions 111, they can be integrally separated or partially separated by means such as pre-cutting or punching.

[0050] When the liquid leakage detection tape 1 is connected to the housing of the battery, the position of the first test area 210 can be correspondingly set with the position of the explosion-proof valve 4, the pole 3 or the liquid injection port on the battery. At this time, the first openable area 110 can also be correspondingly set with the position of the explosion-proof valve 4, the pole 3 or the liquid injection port on the battery. For example, when the first test area 210 corresponds to the position of the explosion-proof valve 4, at least one of the plurality of first peeling parts 211 can be peeled off according to the shape and size of the explosion-proof valve 4. At this time, at least one of the plurality of first openable parts 111 can be peeled off so that the explosion-proof valve 4 can pass through the liquid leakage detection tape 1; when the first test area 210 corresponds to the position of the pole 3, at least one of the plurality of first peeling parts 211 can be peeled off according to the shape and size of the pole 3. At this time, at least one of the plurality of first openable parts 111 can be peeled off so that the pole 3 can pass through the liquid leakage detection tape 1; when the first test area 210 corresponds to the position of the liquid injection port, at least one of the plurality of first peeling parts 211 can be peeled off according to the shape and size of the liquid injection port. At this time, at least one of the plurality of first openable parts 111 can be peeled off so that the liquid injection port can pass through the liquid leakage detection tape 1.

[0051] By providing a plurality of first openable parts 111, it is possible to select different first openable parts 111 to be peeled off according to the shape and size of the area to be detected on the battery, so that the base layer 100 surrounds the area to be detected. Not only can it effectively prevent the electrolyte from diffusing around when leakage occurs at the edge of the area to be detected, improving the accuracy of detection, but also it can detect batteries with different structures, improving the applicable range of the liquid leakage detection tape 1. It can also avoid the occurrence of a gap between the color display layer 200 and the battery due to the area to be detected abutting against the base layer 100, further improving the tightness of the fit between the color display layer 200 and the battery, and making the detection more accurate.

[0052] As Figure 3 shown, in the technical solution of this embodiment, the color display layer 200 further includes a second test area 220. The second test area 220 is spaced from the first test area 210. A plurality of second peeling parts 221 are provided in the second test area 220. From the center of the second test area 220 to the edge of the second test area 220, the plurality of second peeling parts 221 are arranged in sequence, and any two adjacent second peeling parts 221 are separably connected.

[0053] For example, between two adjacent second peeling parts 221, they can be integrally separated or partially separated by means such as pre-cutting or punching.

[0054] By setting the second test area 220, when the liquid leakage detection tape 1 is connected to the housing of the battery, the position of the first test area 210 can be correspondingly set with the position of one of the explosion-proof valve 4 and the pole 3 on the battery, and the second test area 220 can be correspondingly set with the position of the other of the explosion-proof valve 4 and the pole 3 on the battery. For example, when the first test area 210 corresponds to the position of the explosion-proof valve 4, the second test area 220 can correspond to the position of the pole 3. At least one of the plurality of second peeling portions 221 can be peeled according to the shape and size of the pole 3, so that the color display layer 200 can surround the pole 3 to detect whether there is liquid leakage at the connection position between the pole 3 and the housing; when the first test area 210 corresponds to the position of the pole 3, the second test area 220 can correspond to the position of the explosion-proof valve 4. At least one of the plurality of second peeling portions 221 can be peeled according to the shape and size of the explosion-proof valve 4, so that the color display layer 200 can surround the explosion-proof valve 4 to detect whether there is liquid leakage at the connection position between the explosion-proof valve 4 and the housing.

[0055] By providing a plurality of second peeling portions 221, different second peeling portions 221 can be selected for peeling according to the different shapes and sizes of the areas to be detected on the battery, so that the display layer surrounds the area to be detected, and whether there is liquid leakage at the edge of the area to be detected can be detected. This not only improves the detection accuracy, but also can detect batteries with different structures, thus increasing the applicable range of the liquid leakage detection tape 1.

[0056] In addition, by setting the second test area 220 and cooperating with the first test area 210, the liquid leakage detection tape 1 can detect the pole 3 and the explosion-proof valve 4 on the same side of the battery simultaneously, improving the detection efficiency.

[0057] As Figure 3 shown, in the technical solution of this embodiment, the color display layer 200 includes two second test areas 220, and the second test areas 220 are located on opposite sides of the first test area 210.

[0058] Among them, when the liquid leakage detection tape 1 is connected to the battery, the position of the first test area 210 can be correspondingly set with the position of the explosion-proof valve 4 on the battery, and the second test area 220 can be correspondingly set with the position of the pole 3. One second test area 220 corresponds to the positive pole of the battery, and the other second test area 220 corresponds to the negative pole of the battery.

[0059] In this way, when the explosion-proof valve 4 and the two poles 3 are on the same side of the battery, the liquid leakage detection tape 1 can detect liquid leakage of the explosion-proof valve 4 and the two poles 3 simultaneously, further improving the detection efficiency. Moreover, when the explosion-proof valve 4 and one pole 3 are on the same side of the battery and the other pole 3 is on the other side of the battery, the liquid leakage detection tape 1 is still applicable, and the applicable range of the liquid leakage detection tape 1 is also increased, and the application scenarios of the liquid leakage detection tape 1 are more.

[0060] In some embodiments not shown, the outer contours of at least two of the plurality of first peeling portions 211 have the same shape.

[0061] As Figure 3 shown, in the technical solution of this embodiment, the outer contours of at least two of the plurality of first peeling portions 211 are different.

[0062] As Figure 3 shown, in the technical solution of this embodiment, the outer contours of at least two of the plurality of second peeling portions 221 have the same shape.

[0063] As Figure 3 shown, in the technical solution of this embodiment, the outer contours of at least two of the plurality of second peeling portions 221 have the same shape.

[0064] In this way, the construction methods of the plurality of first peeling portions 211 are more diverse, and the shape of the first peeling portion 211 can be adjusted according to the usage requirements. The construction methods of the plurality of second peeling portions 221 are more diverse, and the shape of the second peeling portion 221 can be adjusted according to the usage requirements, improving the applicable range of the liquid leakage detection tape 1.

[0065] As Figure 2 shown, in the technical solution of this embodiment, the base layer 100 includes a second perforable area 120. A plurality of second perforable portions 121 are provided in the second perforable area 120. From the center of the second perforable area 120 to the edge of the second perforable area 120, the plurality of second perforable portions 121 are arranged in sequence. Any two adjacent second perforable portions 121 are separably connected. The plurality of second perforable portions 121 and the plurality of second peeling portions 221 are provided in one-to-one correspondence.

[0066] For example, between two adjacent second perforable portions 121, they can be integrally separated or partially separated by pre-cutting or punching.

[0067] When the liquid leakage detection tape 1 is connected to the housing of the battery, the position of the second test area 220 can be correspondingly set with the position of the explosion-proof valve 4 or the pole 3 on the battery. At this time, the second perforable area 120 can also be correspondingly set with the position of the explosion-proof valve 4 or the pole 3 on the battery. For example, when the second test area 220 corresponds to the position of the explosion-proof valve 4, at least one of the plurality of second peeling portions 221 can be peeled off according to the shape and size of the explosion-proof valve 4. At this time, at least one of the plurality of second perforable portions 121 can be peeled off so that the explosion-proof valve 4 can pass through the liquid leakage detection tape 1; when the second test area 220 corresponds to the position of the pole 3, at least one of the plurality of second peeling portions 221 can be peeled off according to the shape and size of the pole 3. At this time, at least one of the plurality of second perforable portions 121 can be peeled off so that the pole 3 can pass through the liquid leakage detection tape 1.

[0068] By providing a plurality of second pierceable portions 121, according to the shape and size of the area to be detected on the battery, different second pierceable portions 121 can be selected for peeling, so that the base layer 100 surrounds the area to be detected. This can not only effectively prevent the electrolyte from spreading around when leakage occurs at the edge of the area to be detected, improving the accuracy of detection, but also detect batteries with different structures, expanding the applicable range of the leakage detection tape 1. Moreover, it can avoid the occurrence of a gap between the color display layer 200 and the battery due to the area to be detected abutting against the base layer 100, further improving the tightness of the fit between the color display layer 200 and the battery and making the detection more accurate.

[0069] As Figure 3 shown, in the technical solution of this embodiment, the color display layer 200 further includes a matrix area 230. The outermost first peeling portion 211 is separably connected to the matrix area 230, and the outermost second peeling portion 221 is separably connected to the matrix area 230.

[0070] By providing the matrix area 230, the first test area 210, the second test area 220, and the matrix area 230 can be connected into an integral structure. At this time, the color display layer 200 is an integral structure, which facilitates processing and manufacturing and improves the production efficiency of the leakage detection tape 1.

[0071] Among them, the base layer 100 may include a main body area 130. The position of the main body area 130 may be correspondingly set with the matrix area 230. Both the first pierceable area 110 and the second pierceable area 120 are connected to the main body area 130. At this time, the color display layer 200 is an integral structure, which facilitates processing and manufacturing and improves the production efficiency of the leakage detection tape 1.

[0072] Moreover, the outermost first peeling portion 211 and the matrix area 230 can be integrally separated or partially separated by means such as pre-cutting or punching; the outermost second peeling portion 221 and the main body area 130 can be integrally separated or partially separated by means such as pre-cutting or punching; the outermost first pierceable portion and the matrix area 230 can be integrally separated or partially separated by means such as pre-cutting or punching; the outermost second pierceable portion 121 and the main body area 130 can be integrally separated or partially separated by means such as pre-cutting or punching.

[0073] In some embodiments not shown, the color display layer 200 does not include the matrix area 230, and the first test area 210 and the second test area 220 are separately provided; the base layer 100 does not include the main body area 130, and the first pierceable area 110 and the second pierceable area 120 are separately provided.

[0074] In this way, the setting positions of the first test area 210 and the second test area 220 do not affect each other, the setting flexibility of the first test area 210 and the second test area 220 is higher, and the manufacturing materials of the liquid leakage detection tape 1 can be reduced, and the cost and weight can be lowered.

[0075] In the embodiment of the present utility model, the base layer 100 is configured as a transparent structure. In this way, during detection, it is possible to directly observe through the base layer 100 with the naked eye whether the color on the color display layer 200 changes, and the observation is more convenient.

[0076] In the embodiment of the present utility model, the elongation rate of the base layer 100 is not less than 35%. In this way, the ductility of the base layer 100 is relatively good, and the base layer 100 can be deformed without being easily damaged. At this time, the first perforable area 110 and the second perforable area 120 may not be provided on the base layer 100, and the base layer 100 can adapt to the shapes of the terminal post 3 and the explosion-proof valve 4 to ensure the fit between the color display layer 200 and the battery housing, and can avoid the color of the color display layer 200 being interfered by external substances and changing, improve the accuracy of the detection result, and there is no need to peel off a part of the base layer 100 during use, and the use is more convenient.

[0077] According to an embodiment of the present utility model, on the other hand, a battery is also provided. Figure 4 As shown, the battery includes a housing, an electrolyte, and the liquid leakage detection tape 1 according to the above embodiment. The electrolyte is provided in the housing, and the liquid leakage detection tape 1 is connected to the outer surface of the housing.

[0078] For example, the housing may include a housing body and a cover plate 2. The housing body and the cover plate 2 define a receiving cavity. The electrolyte is located in the receiving cavity, and a battery core is also provided in the receiving cavity. The cover plate 2 may be provided with at least one of a terminal post 3, an explosion-proof valve 4, and a liquid injection port. The terminal post 3 is connected to the battery core, the liquid injection port is used to inject the electrolyte into the receiving cavity, and the explosion-proof valve 4 is used to discharge high-temperature and high-pressure gas when the battery undergoes thermal runaway to avoid battery explosion.

[0079] Among them, the liquid leakage detection tape 1 may be connected to the cover plate 2, and the first test area 210 is correspondingly arranged with the position of the terminal post 3, or the first test area 210 is correspondingly arranged with the position of the explosion-proof valve 4, or the first test area 210 is correspondingly arranged with the position of the liquid injection port.

[0080] Among them, when the first openable area 110 and the second openable area 120 are provided in the base layer 100, the terminal post 3 and the explosion-proof valve 4 can pass through the liquid leakage detection tape 1, so that the normal connection between the battery and external electrical components will not be affected. Therefore, the liquid leakage detection tape 1 can be used together with the battery without removing the liquid leakage detection tape 1 from the housing. The liquid leakage detection tape 1 can not only detect whether the battery leaks liquid at all times, with higher safety and more timely feedback, but also because the base layer 100 is usually made of insulating material, the liquid leakage detection tape 1 can play a role in insulating the housing from the outside and improve the insulation performance of the battery.

[0081] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A liquid leakage detection tape, characterized in that, Comprising: A base layer (100); A color display layer (200) provided on the base layer (100), the color display layer (200) being provided with an adhesive and a color-changing material. The adhesive of the color display layer (200) is used for bonding with the housing of the battery, and the color-changing material of the color display layer (200) changes color when contacting the electrolyte of the battery. The color display layer (200) includes a first test area (210), and a plurality of first peeling portions (211) are provided in the first test area (210). From the center of the first test area (210) to the edge of the first test area (210), the plurality of first peeling portions (211) are arranged in sequence, and any two adjacent first peeling portions (211) are separably connected.

2. The liquid leakage detection tape according to claim 1, wherein, The base layer (100) includes a first perforable area (110), and a plurality of first perforable portions (111) are provided in the first perforable area (110). From the center of the first perforable area (110) to the edge of the first perforable area (110), the plurality of first perforable portions (111) are arranged in sequence, and any two adjacent first perforable portions (111) are separably connected. The plurality of first perforable portions (111) and the plurality of first peeling portions (211) are arranged in one-to-one correspondence.

3. The liquid leakage detection tape according to claim 1, characterized in that, The color display layer (200) further includes: A second test area (220) spaced from the first test area (210), and a plurality of second peeling portions (221) are provided in the second test area (220). From the center of the second test area (220) to the edge of the second test area (220), the plurality of second peeling portions (221) are arranged in sequence, and any two adjacent second peeling portions (221) are separably connected.

4. The leak detection tape according to claim 3, characterized in that, The color display layer (200) includes two second test areas (220), and the second test areas (220) are located on opposite sides of the first test area (210).

5. The leak detection tape according to claim 3, wherein The outer contours of at least two of the plurality of first peeling portions (211) have the same shape; and / or The outer contours of at least two of the plurality of first peeling portions (211) have different shapes; and / or The outer contours of at least two of the plurality of second peeling portions (221) have the same shape; and / or The outer contours of at least two of the plurality of second peeling portions (221) have the same shape.

6. The leak detection tape according to claim 3, wherein The base layer (100) includes a second perforable area (120), and a plurality of second perforable portions (121) are provided in the second perforable area (120). From the center of the second perforable area (120) to the edge of the second perforable area (120), the plurality of second perforable portions (121) are arranged in sequence, and any two adjacent second perforable portions (121) are separably connected. The plurality of second perforable portions (121) and the plurality of second peeling portions (221) are arranged in one-to-one correspondence.

7. The leak detection tape according to claim 3, wherein, The color display layer (200) further includes a substrate region (230), and the outermost first peeling portion (211) is separably connected to the substrate region (230), and the outermost second peeling portion (221) is separably connected to the substrate region (230).

8. The liquid leakage detection tape according to claim 1, characterized in that, The base layer (100) is configured as a transparent structure; and / or The elongation rate of the base layer (100) is not less than 35%.

9. The liquid leakage detection tape according to any one of claims 1-8, characterized in that, The color-changing material includes one or more of thymol blue, methyl yellow, methyl orange, bromophenol blue, bromocresol green, methyl red, bromothymol blue, neutral red, phenol red, phenolphthalein, thymolphthalein, litmus, etc.

10. A battery, characterized in that, Comprising: A housing; An electrolyte disposed within the housing; The liquid leakage detection tape (1) according to any one of claims 1-9, wherein the liquid leakage detection tape (1) is connected to the outer surface of the housing.

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