Battery insulating film, battery module, and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery insulating film, a battery assembly and a battery pack, the battery insulating film comprises an insulating film main body and a bonding layer, and the insulating film main body is used for coating a battery. The bonding layer is arranged on the insulating film main body, and the bonding layer is located on the side, away from the side face of the battery, of the insulating film main body in the state that the battery is coated with the insulating film main body. An adhesive layer is attached to the insulating film body. When the insulating film body wraps the battery, the bonding layer is just located on the side, away from the side face of the battery, of the insulating film body. After the batteries are coated by the insulating film main body, when a plurality of batteries are connected and paired, the bonding layer on one battery is bonded on the insulating film main body on the outer side of the side surface of the other battery, so that the side surfaces of the two batteries are bonded through the bonding layer. The insulating film main body does not need to be additionally and manually glued, the gluing size, position thickness and the like do not need to be manually controlled, the operation difficulty is reduced, and compared with manual gluing, the quality is better, and the efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery insulating film, battery assembly, and battery pack. Background Technology

[0002] A battery pack is assembled from multiple batteries connected in series or parallel to provide higher voltage and capacity to meet the power requirements of specific applications. Before connecting the batteries in series or parallel, adhesive is often applied to directly bond adjacent batteries together or to bond them indirectly to spacers between adjacent batteries, thus completing the assembly of the battery pack.

[0003] The batteries need to be covered with an insulating film. When arranging the batteries in sequence to form a battery pack, adhesive is usually applied to the outer side of the insulating film of the batteries to bond adjacent batteries together. Controlling the size, location, and thickness of the adhesive application is difficult, resulting in poor quality and low efficiency. Utility Model Content

[0004] In view of this, this application provides a battery insulating film, a battery assembly, and a battery pack to solve or improve the problem that manual adhesive application is required when bonding individual batteries together in sequence, which is difficult to operate and results in poor quality and low efficiency.

[0005] In a first aspect, this application provides a battery insulating film, comprising:

[0006] The insulating film body is used to cover the battery;

[0007] An adhesive layer is disposed on the insulating film body, and when the insulating film body covers the battery, the adhesive layer is located on the side of the insulating film body away from the side of the battery.

[0008] Optionally, it also includes:

[0009] An anti-stick film is attached to the adhesive layer on the side opposite to the insulating film body, and the anti-stick film can cover the adhesive layer.

[0010] Optionally, it also includes:

[0011] A tear-off tab is attached to the anti-stick film, and the tear-off tab extends out of the insulating film body.

[0012] Optionally, at least two adhesive layers are provided. When the insulating film body covers the battery, the first adhesive layer is located on the side of the insulating film body away from the first side of the battery, and the second adhesive layer is located on the side of the insulating film body away from the second side of the battery, wherein the first side and the second side of the battery are arranged opposite to each other.

[0013] Optionally, the insulating film body includes:

[0014] A first large surface area is used to cover the first large surface of the battery, and the adhesive layer is disposed on the first large surface area;

[0015] A top surface area is provided to cover the top surface of the battery. The top surface area is provided with a through hole, and when the top surface area covers the top surface of the battery, the terminal of the battery passes through the through hole.

[0016] The second large surface area is used to cover the second large surface of the battery, and the adhesive layer is disposed on the first large surface area;

[0017] The bottom surface area is used to cover the bottom surface of the battery, and the bottom surface area, the first large surface area, the top surface area and the second large surface area are connected in sequence.

[0018] Among them, the two sides with larger surface areas of the battery are the two large surfaces, and the top and bottom of the battery are the top surface and the bottom surface of the battery, respectively.

[0019] Optionally, the bottom surface area includes a first bottom surface area and a second bottom surface area. The first bottom surface area is connected to the first large surface area, and the second bottom surface area is connected to the second large surface area. When both the first bottom surface area and the second bottom surface area are attached to the bottom surface of the battery, the first bottom surface area and the second bottom surface area are connected and cover the bottom surface of the battery.

[0020] Optionally, the insulating film body further includes:

[0021] The first side surface area is connected to the two ends of the first large surface area and is used to attach to the narrow surface of the battery.

[0022] The second side surface area is connected to the two ends of the second large surface area and is used to attach to the narrow surface of the battery.

[0023] The two sides of the battery with smaller surface areas are two narrow surfaces.

[0024] Optionally, it also includes:

[0025] The third side surface area, connected to the end of the top surface area, is used to attach to the narrow surface of the battery;

[0026] The fourth side surface area is connected to the end of the bottom surface area and is used to attach to the narrow surface of the battery.

[0027] Secondly, this application also provides a battery assembly, including a battery and any of the battery insulating films described above, wherein the battery insulating film covers the battery.

[0028] Thirdly, this application also provides a battery pack, including a plurality of batteries arranged in sequence, at least some of the surface of the batteries being covered with any of the battery insulating films described above, and an adhesive layer being provided between two adjacent batteries.

[0029] This application provides a battery insulating film, comprising an insulating film body and an adhesive layer, wherein the adhesive layer is attached to the insulating film body. When the insulating film body covers the battery, the adhesive layer is located precisely on the side of the insulating film body opposite to the battery side. After the insulating film body covers the battery, when connecting and pairing multiple batteries, the adhesive layer on one battery is adhered to the outer side of the insulating film body of another battery, thereby bonding the sides of the two batteries together through the adhesive layer. This eliminates the need for additional manual application of adhesive to the insulating film body, and eliminates the need for manual control of the size, position, and thickness of the adhesive, reducing operational difficulty and providing better quality and higher efficiency compared to manual adhesive application. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram showing the unfolded state of a battery insulating film according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram showing the first bottom surface area of ​​a battery insulating film being attached to the bottom surface of a battery in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram showing the first large surface area of ​​a battery insulating film being bonded to the first large surface area of ​​a battery in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram showing the second large surface area of ​​a battery insulating film being bonded to the second large surface area of ​​a battery in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram showing the second bottom surface area of ​​a battery insulating film being bonded to the bottom surface of a battery in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of an insulating film body covering a battery in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the anti-sticking film peeling off the adhesive layer of a battery insulating film according to an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of a battery assembly according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Adhesive layer; 2. Anti-stick film; 3. Peel-off sheet; 4. Bottom area; 41. First bottom area; 42. Second bottom area; 5. First large surface area; 6. Top area; 7. Second large surface area; 8. Battery; 9. Through hole; 10. First side area; 11. Second side area; 12. Third side area; 13. Fourth side area. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] The following is combined with Figures 1 to 8 This describes an embodiment of the present application.

[0043] According to embodiments of this application, on the one hand, such as Figure 1 As shown, a battery insulating film is provided, comprising: an insulating film body and an adhesive layer 1, wherein the insulating film body is used to cover a battery 8. The adhesive layer 1 is attached to the insulating film body. When the insulating film body covers the battery 8, the adhesive layer 1 is located precisely on the side of the insulating film body opposite to the side of the battery 8. The side of the battery 8 can be a large surface or a narrow surface, preferably a large surface of the battery 8.

[0044] With this configuration, after the insulating film body covers the battery 8, when connecting and pairing multiple batteries 8, the adhesive layer 1 on one battery 8 is bonded to the insulating film body on the outer side of another battery 8, thereby bonding the large surfaces of the two batteries 8 together through the adhesive layer 1. This eliminates the need for manual application of adhesive to the insulating film body, and eliminates the need for manual control of the size, position, and thickness of the adhesive, reducing operational difficulty and offering better quality and higher efficiency compared to manual adhesive application.

[0045] The adhesive layer 1 can be an adhesive backing.

[0046] In some embodiments, such as Figure 1As shown, the insulating film body also includes an anti-adhesive film 2, which is adhered to the side of the adhesive layer 1 facing away from the insulating film body. The anti-adhesive film 2 can be release paper, so that the anti-adhesive film 2 and the adhesive layer 1 combine to form a self-adhesive adhesive. The presence of the anti-adhesive film 2 effectively prevents the adhesive layer 1 from being damaged and affecting its bonding ability, and also prevents the adhesive layer 1 from being accidentally adhered to other locations. When multiple batteries 8 need to be connected and paired, the anti-adhesive film 2 on the adhesive layer 1 of one battery 8 is peeled off, exposing the adhesive layer 1. Then, the adhesive layer 1 is adhered to the insulating film body on the outer side of the large surface of another battery 8, thereby bonding the large surfaces of the two batteries 8 together through the adhesive layer 1.

[0047] The anti-adhesive film 2 should be larger than the adhesive layer 1 to ensure that the anti-adhesive film 2 can completely cover the adhesive layer 1, which not only avoids partial exposure of the adhesive layer 1, but also makes it easy to peel the anti-adhesive film 2 off the adhesive layer 1.

[0048] In a further embodiment, such as Figure 1 As shown, the insulating film body also includes a tear-off tab 3, which is attached to the side of the anti-adhesive film 2. After the anti-adhesive film 2 is adhered to the adhesive layer 1, the tear-off tab 3 extends out of the insulating film body. With this configuration, after the insulating film body covers the battery 8, the end of the tear-off tab 3 away from the anti-adhesive film 2 extends out of the battery 8. When multiple batteries 8 need to be connected and paired, pinching the end of the tear-off tab 3 away from the anti-adhesive film 2 and pulling it up allows the anti-adhesive film 2 on the adhesive layer 1 to be peeled off, exposing the adhesive layer 1, making the operation more convenient.

[0049] In optional embodiments, such as Figure 1 As shown, at least two adhesive layers 1 are provided, and two can be provided. When the insulating film body covers the battery 8, the first adhesive layer 1 is located exactly on the side of the insulating film body away from the first side of the battery 8, and the second adhesive layer 1 is located exactly on the side of the insulating film body away from the second side of the battery 8, wherein the first side and the second side of the battery 8 are arranged opposite to each other. That is, when the insulating film body covers the battery 8, adhesive layers 1 are provided on the outer sides of both opposite sides of the battery 8.

[0050] When connecting and pairing multiple batteries 8, the adhesive layer 1 on the outer side of the insulating film of one battery 8 is bonded to the outer side of the insulating film of another battery 8 via the adhesive layer 1. This mating method of adhesive layer 1 makes the bonding more secure and reliable. In other embodiments, the adhesive layer can be provided only on the first side of the battery 8. When assembling multiple batteries 8, the first side of one battery 8 is positioned opposite the second side of another battery 8, and the two batteries 8 are bonded together via the adhesive layer 1 on the outer side of the insulating film.

[0051] In optional embodiments, such as Figures 1 to 5 As shown, the insulating film body includes: a first large surface area 5, a top surface area 6, a second large surface area 7, and a bottom surface area 4. The top surface area 6 has two through holes 9 at its top. Both the first large surface area 5 and the second large surface area 7 are provided with an adhesive layer 1. The bottom surface area 4, the first large surface area 5, the top surface area 6, and the second large surface area 7 are connected sequentially. Specifically, the bottom surface area 4 is integrally connected to the first side of the first large surface area 5, the first side of the top surface area 6 is integrally connected to the second side of the first large surface area 5, and the second side of the top surface area 6 is integrally connected to the first side of the second large surface area 7.

[0052] When covering the battery 8, the bottom area 4 is attached to the bottom surface of the battery 8. Then, the first large area 5 is rotated around its connection with the bottom area 4 until the side of the first large area 5 facing away from the adhesive layer 1 is attached to the first large surface of the battery 8. Then, the top area 6 is rotated around its connection with the first large area 5 until the top area 6 is attached to the top surface of the battery 8. At this point, the two terminals on the top surface of the battery 8 can pass through the two through holes 9 on the top area 6 to ensure that the top area 6 is attached to the top surface of the battery 8. Then, the second large area 7 is rotated around its connection with the top area 6 until the side of the first large area 5 facing away from the adhesive layer 1 is attached to the second large surface of the battery 8. This completes the covering of the battery 8.

[0053] With this configuration, due to the presence of the through hole 9 on the top surface area 6, the top surface, bottom surface, and two large surfaces of the battery 8 can be covered at once, eliminating the need to attach an additional top cover to the top surface of the battery 8, thus saving operational steps and improving work efficiency.

[0054] Furthermore, such as Figure 1 As shown, the bottom area 4 includes a first bottom area 41 and a second bottom area 42. The first bottom area 41 is connected to the first side of the first large area 5 as a whole. The first side of the top area 6 is connected to the second side of the first large area 5. The second side of the top area 6 is connected to the first side of the second large area 7 as a whole. The second side of the second large area 7 is connected to the second bottom area 42 as a whole.

[0055] When covering the battery 8, the first bottom surface area 41 is attached to the bottom surface of the battery 8, so that the first bottom surface area 41 covers a portion of the bottom surface of the battery 8. Then, the first large surface area 5 is rotated around its connection with the first bottom surface area 41 until the side of the first large surface area 5 facing away from the adhesive layer 1 is attached to the first large surface of the battery 8. Then, the top surface area 6 is rotated around its connection with the first large surface area 5 until the top surface area 6 is attached to the top surface of the battery 8. Then, the second large surface area 7 is rotated around its connection with the top surface area 6 until the side of the second large surface area 7 facing away from the adhesive layer 1 is attached to the second large surface of the battery 8. Next, the second bottom surface area 42 is rotated around its connection with the second large surface of the battery 8 until the second bottom surface area 42 is attached to the bottom surface of the battery 8, so that the second bottom surface area 42 covers the remaining part of the bottom surface of the battery 8. At this point, the first bottom surface area 41 and the second bottom surface area 42 are connected and together cover the bottom surface of the battery 8. Thus, the covering of the battery 8 is completed.

[0056] The first bottom area 41 and the second bottom area 42 can be exactly joined or at least partially overlapped.

[0057] In other further embodiments, such as Figures 1 to 7 As shown, the insulating film body also includes: a first side area 10 and a second side area 11. The first side area 10 is connected to the two ends of the first large surface area 5. After the side of the first large surface area 5 facing away from the adhesive layer 1 is bonded to the first large surface of the battery 8, the first side area 10 is rotated around its connection with the first large surface area 5 until the first side area 10 is bonded to the narrow surface of the battery 8. The second side area 11 is connected to the two ends of the second large surface area 7. After the side of the second large surface area 7 facing away from the adhesive layer 1 is bonded to the second large surface of the battery 8, the second side area 11 is rotated around its connection with the second large surface area 7 until the second side area 11 is bonded to the narrow surface of the battery 8. Since both the first side area 10 and the second side area 11 are bonded to the narrow surface of the battery 8, the various surfaces of the battery are covered.

[0058] The first side area 10 and the second side area 11 located at the same end can overlap, fit together, or have a gap between them.

[0059] It is worth noting that each of the two ends of the first large surface area 5 should be connected to a first side surface area 10, and the first side surface areas 10 at both ends of the first large surface area 5 are respectively used to adhere to the two narrow surfaces of the battery 8. Each of the two ends of the second large surface area 7 should be connected to a second side surface area 11, and the second side surface areas 11 at both ends of the second large surface area 7 are respectively used to adhere to the two narrow surfaces of the battery 8. The first side surface area 10 and the second side surface area 11 located at the same side end of the two first large surface areas 5 are attached to the same narrow surface of the battery 8.

[0060] Furthermore, such as Figures 1 to 7As shown, the insulating film body also includes a third side region 12 and a fourth side region 13. The third side region 12 is connected to the end of the top surface region 6. After the top surface region 6 is attached to the top surface of the battery 8, the third side region 12 is rotated around its connection with the top surface region 6 until it is attached to the side of the battery 8. The fourth side region 13 is connected to the end of the bottom surface region 4. After the bottom surface region 4 is attached to the bottom surface of the battery 8, the fourth side region 13 is rotated around its connection with the bottom surface region 4 until it is attached to the side of the battery 8. Since both the third side region 12 and the fourth side region 13 are attached to the sides of the battery 8, the various surfaces of the battery are covered.

[0061] When covering the battery 8, firstly, the bottom area 4, the first large area 5, the top area 6, and the second large area 7 are used to cover the bottom, first large area, top, and second large areas of the battery 8, respectively. Then, the third side area 12 is rotated around its connection with the top area 6, and the fourth side area 13 is rotated around its connection with the bottom area 4, until both the third side area 12 and the fourth side area 13 are in contact with the sides of the battery 8. Next, the first side area 10 is rotated around its connection with the first large area 5, and the second side area 11 is rotated around its connection with the second large area 7, until the first side area 10 and the second side area 11 are in contact with the third side area 12 and the fourth side area 13 and are in contact with the sides of the battery 8.

[0062] According to embodiments of this application, on the other hand, such as Figure 8 The diagram also shows a battery assembly comprising a battery 8 and any of the aforementioned battery insulating films, wherein the battery insulating film covers the battery 8. The technical effect of this battery assembly is the same as that of the battery insulating film, and therefore will not be described in detail.

[0063] According to an embodiment of this application, in another aspect, a battery pack is also provided, comprising a plurality of batteries 8 arranged in sequence, at least some of the surface of the batteries 8 being covered with any of the aforementioned battery insulating films, and an adhesive layer 1 being disposed between adjacent batteries 8. The technical effect of this battery pack is the same as that of the battery assembly, and therefore will not be described in detail.

[0064] Although embodiments of this application 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 this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A battery insulating film, characterized in that, include: The insulating film body is used to cover the battery (8); An adhesive layer (1) is disposed on the insulating film body. When the insulating film body covers the battery (8), the adhesive layer (1) is located on the side of the insulating film body away from the side of the battery (8).

2. The battery insulating film according to claim 1, characterized in that, Also includes: An anti-stick film (2) is attached to the adhesive layer (1) on the side away from the main body of the insulating film, and the anti-stick film (2) can cover the adhesive layer (1).

3. The battery insulating film according to claim 2, characterized in that, Also includes: A tear-off piece (3) is connected to the anti-stick film (2), and the tear-off piece (3) extends out of the insulating film body.

4. The battery insulating film according to claim 1, characterized in that, At least two adhesive layers (1) are provided. When the insulating film body covers the battery (8), the first adhesive layer (1) is located on the side of the insulating film body away from the first side of the battery (8), and the second adhesive layer (1) is located on the side of the insulating film body away from the second side of the battery (8), wherein the first side and the second side of the battery (8) are arranged opposite to each other.

5. The battery insulating film according to claim 1, characterized in that, The insulating film body includes: A first large surface area (5) is used to cover the first large surface of the battery (8), and the adhesive layer (1) is disposed on the first large surface area (5); Top surface area (6) is used to cover the top surface of the battery (8). The top surface area (6) is provided with a through hole (9). When the top surface area (6) covers the top surface of the battery (8), the terminal of the battery (8) passes through the through hole (9). The second large surface area (7) is used to cover the second large surface of the battery (8), and the adhesive layer (1) is disposed on the first large surface area (5); Bottom area (4) is used to cover the bottom surface of the battery (8), and the bottom area (4), the first large surface area (5), the top surface area (6) and the second large surface area (7) are connected in sequence.

6. The battery insulating film according to claim 5, characterized in that, The bottom surface area (4) includes a first bottom surface area (41) and a second bottom surface area (42). The first bottom surface area (41) is connected to the first large surface area (5), and the second bottom surface area (42) is connected to the second large surface area (7). When both the first bottom surface area (41) and the second bottom surface area (42) are attached to the bottom surface of the battery (8), the first bottom surface area (41) and the second bottom surface area (42) are connected and cover the bottom surface of the battery (8).

7. The battery insulating film according to claim 5, characterized in that, The insulating film body also includes: The first side surface area (10) is connected to the two ends of the first large surface area (5) and is used to attach to the narrow surface of the battery (8); The second side surface area (11) is connected to the two ends of the second large surface area (7) and is used to attach to the narrow surface of the battery (8).

8. The battery insulating film according to claim 7, characterized in that, The insulating film body also includes: The third side surface area (12) is connected to the two ends of the top surface area (6) and is used to attach to the narrow surface of the battery (8); The fourth side surface area (13) is connected to the two ends of the bottom surface area (4) and is used to attach to the narrow surface of the battery (8).

9. A battery assembly, characterized in that, It includes a battery (8) and a battery insulating film as described in any one of claims 1-8, wherein the battery insulating film covers the battery (8).

10. A battery pack, characterized in that, It includes a plurality of batteries (8) arranged in sequence, at least a portion of the surface of the batteries (8) is covered with a battery insulating film as described in any one of claims 1-8, and an adhesive layer (1) is provided between two adjacent batteries (8).

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