Insulating tape structure for battery pack, and battery pack

Abstract

The utility model provides an insulating tape structural body for a battery pack and the battery pack. One embodiment of the insulating tape structure (5) is characterized in that the insulating tape structure (5) comprises two symmetrical adhesive insulating tapes (3, 3) arranged oppositely and a non-adhesive insulating tape (4) arranged between the two adhesive insulating tapes (3, 3), the non-adhesive insulating tape (4) is of a symmetrical shape and has a width larger than the width of the adhesive insulating tape (3), and the two adhesive insulating tapes (3, 3) and the non-adhesive insulating tape (4) are integrally formed in a cross shape. The battery pack is characterized by having the insulating tape structure.

Description

Technical Field

[0001] The utility model relates to an insulating tape structure for a battery pack and a battery pack. Background Art

[0002] In recent years, various electronic products have been continuously developed, and the requirements for battery packs as the driving power sources of these electronic products have been continuously improved. Various studies have been carried out on battery pack components and their connection methods, etc., considering their performance such as safety, production efficiency, and cost.

[0003] The insulating tape adhered to the outer surface of the battery circuit board (PCB board) unit assembly, etc. of the battery pack plays the roles of insulation, waterproofing, protection, beautifying the appearance, and identification, and is an important component for maintaining the battery performance and reflecting the battery quality. Therefore, battery manufacturers attach great importance to the structure and performance of such insulating tapes and the adhesion process.

[0004] Regarding the product structure of the existing battery packs, for example, it is not allowed to cover the adhesive insulating tape on the surface of the battery circuit board (PCB board) unit assembly, etc. (because the glue will adsorb moisture and damage the structure inside the substrate). In this way, it is necessary to use two insulating tapes on the substrate surface to achieve this function, that is, first, an adhesive-free insulating cloth is set on the surface of the unit assembly, and then an insulating tape with an adhesive such as pressure-sensitive adhesive (such as a PP transparent tape) is adhered to the insulating cloth for fixation, which is rather time-consuming.

[0005] Therefore, it is desired to develop an insulating tape structure for a battery pack with a simplified structure, easy operation, low cost, and good stability, and a battery pack using such an insulating tape structure. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an insulating tape structure for a battery pack with a simplified structure, easy operation, low cost, and good stability, and a battery pack using such an insulating tape structure.

[0007] In order to achieve the above purpose, the inventor has conducted careful research and obtained the following technical solutions.

[0008] (1) An insulating tape structure for a battery pack, characterized in that it comprises two symmetrically arranged adhesive insulating tapes facing each other and a non-adhesive insulating tape disposed between the two adhesive insulating tapes, the non-adhesive insulating tape is of a symmetric shape and its width is greater than the width of the adhesive insulating tape, and the two adhesive insulating tapes and the non-adhesive insulating tape are integrally formed into a cross shape.

[0009] (2) The insulating tape structure according to (1) above, characterized in that the adhesive insulating tape is square, and the middle part of the non-adhesive insulating tape is square, and the two side parts are square or arc-shaped.

[0010] (3) The insulating tape structure according to (1) or (2) above, characterized in that the base material of the adhesive insulating tape is the same as the material of the non-adhesive insulating tape.

[0011] (4) The insulating tape structure according to (1) or (2) above, characterized in that the adhesive insulating tape comprises a base material and an adhesive provided on the surface of the base material.

[0012] (5) An insulating tape structure for a battery pack, characterized in that it comprises two symmetric adhesive insulating tape assemblies arranged oppositely and a non-adhesive insulating tape provided between the two adhesive insulating tape assemblies. The adhesive insulating tape assembly comprises two or more unit adhesive insulating tapes spaced apart by a certain interval. The non-adhesive insulating tape is of a symmetric shape and its width is greater than the width of the adhesive insulating tape assembly. The two adhesive insulating tape assemblies and the non-adhesive insulating tape are integrally formed.

[0013] (6) The insulating tape structure according to (5) above, characterized in that the unit adhesive insulating tape is square, and the middle part of the non-adhesive insulating tape is square, and the two side parts are square or arc-shaped.

[0014] (7) The insulating tape structure according to (5) or (6) above, characterized in that the base material of the unit adhesive insulating tape is the same as the material of the non-adhesive insulating tape.

[0015] (8) The insulating tape structure according to (5) or (6) above, characterized in that the unit adhesive insulating tape comprises a base material and an adhesive provided on the surface of the base material.

[0016] (9) A battery pack, characterized in that it has the insulating tape structure according to any one of (1) to (8) above.

[0017] (10) The battery pack according to (9) above, characterized in that the non-adhesive insulating tape of the insulating tape structure is covered on the top surface of the battery pack, and the adhesive insulating tape is adhered to the side surface of the battery pack.

[0018] Effect of the utility model

[0019] Since the adhesive insulating tape and the non - adhesive insulating tape of the battery pack insulating tape structure of the present utility model are integrally formed and have an adhesive on the surface of the adhesive insulating tape, it has the effects of simplified structure, easy operation, low cost and good stability. Moreover, it plays a good role in safety protection such as fixing and insulating the electrode terminal components and functional components on the surface of the battery pack, and has a high overall cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of an example of the battery pack insulating tape structure of the first embodiment of the present utility model.

[0021] Figure 2 FIG. is a schematic diagram of an example of the battery pack insulating tape structure of the second embodiment of the present utility model.

[0022] Figure 3 FIG. is a schematic diagram of an example of a battery pack with an insulating tape structure adhered thereto according to the third embodiment of the present utility model.

[0023] Figure 4 FIG. is a schematic diagram of another example of a battery pack with an insulating tape structure adhered thereto according to the third embodiment of the present utility model.

[0024] FIG. 5(a) and FIG. 5(b) are schematic diagrams of the states before and after an insulating tape structure is adhered to a battery pack according to the third embodiment of the present utility model, respectively. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Hereinafter, the specific embodiments and examples of the present utility model will be described in detail with reference to the accompanying drawings. The described embodiments and examples are merely exemplary and can take various forms. In addition, the dimensions in the drawings disclosed in this specification are generally only schematic. That is, the dimensional ratios in the drawings are not necessarily the same as the actual dimensional ratios, and the dimensional ratios may not be the same among the drawings.

[0026] (First Embodiment)

[0027] The first embodiment of the present utility model provides a battery pack insulating tape structure, which is characterized in that it includes two symmetric adhesive insulating tapes arranged opposite to each other and a non - adhesive insulating tape disposed between the two adhesive insulating tapes. The non - adhesive insulating tape is of a symmetric shape and its width is greater than the width of the adhesive insulating tape. The two adhesive insulating tapes and the non - adhesive insulating tape are integrally formed into a cross shape.

[0028] Figure 1 FIG. is a schematic diagram of an example of the battery pack insulating tape structure of the first embodiment of the present utility model. AsFigure 1 As shown, the insulating tape structure 5 for a battery pack includes two symmetric adhesive insulating tapes 3, 3 arranged opposite to each other and a non-adhesive insulating tape 4 disposed between the two adhesive insulating tapes 3, 3. The non-adhesive insulating tape 4 has a symmetric shape and its width is greater than the width of the adhesive insulating tape 3. The length and width of each of the adhesive insulating tape 3 and the non-adhesive insulating tape 4 can be adjusted according to the size of the battery pack and the number of batteries used. For example, the width of the non-adhesive insulating tape 4 can be designed according to the width of the top surface of the battery pack.

[0029] The two adhesive insulating tapes 3, 3 and the non-adhesive insulating tape 4 are integrally formed in a cross shape. The adhesive insulating tape 3 includes a base material and an adhesive 2 provided on the surface of the base material. Figure 1 The shaded part in is the adhesive 2 on the surface of the adhesive insulating tape 3.

[0030] Preferably, the base material of the adhesive insulating tape 3 is the same as the material of the non-adhesive insulating tape 4. An integral insulating cloth can be cut into a size corresponding to the insulating tape structure 5, and then the adhesive 2 is coated on the part corresponding to the adhesive insulating tape 3 of the insulating cloth, while the part corresponding to the non-adhesive insulating tape 4 remains unchanged without coating the adhesive.

[0031] The insulating cloth can be transparent or opaque, but preferably transparent. There is no particular limitation on the material of the insulating cloth, as long as it is commonly used in the battery field, such as polyimide (PI), etc.

[0032] There is no particular limitation on the type of the adhesive, as long as it is a commonly used pressure-sensitive and insulating adhesive. For example, it is a double-sided tape of the 815AT grade of DIC Corporation.

[0033] The adhesive insulating tape 3 is usually square, and can be rectangular or square. Its specific shape, length and width can be adjusted according to the shape and size of the battery pack used.

[0034] Generally speaking, the middle part of the non-adhesive insulating tape 4 is square, and the two side parts are square or arc-shaped. Its specific shape and size can be adjusted according to the shape and size of the battery pack used. When the battery is a cuboid, the two side parts of the non-adhesive insulating tape 4 are square. When the battery is a cylinder, the two side parts of the non-adhesive insulating tape 4 are arc-shaped.

[0035] The insulating tape structure 5 serves to fix and insulate the electrode terminal components and functional components of the battery pack. In the use state, the non-adhesive insulating tape 4 of the insulating tape structure 5 is covered on the top surface of the battery pack, that is, on a part of the electrode terminal components and the surface of the functional components, and the adhesive insulating tape 3 is adhered to the side surface of the battery pack. For such an insulating tape structure, the adhesive does not directly contact the electrode terminal components and the functional components. The adhesive is only adhered to the side surface of the battery pack, and the production efficiency can be improved.

[0036] In the insulating tape structure 5, the adhesive insulating tape 3 and the non-adhesive insulating tape 4 are each of a symmetric shape, and such a symmetric shape can evenly adhere to and fix the battery pack.

[0037] The insulating tape structure 5 can be applied to a primary battery or a secondary battery. The secondary battery can be a lithium secondary battery, a nickel-metal hydride secondary battery, etc.

[0038] Since the insulating tape structure 5 is integrally formed and used, the cost and operation man-hours can be reduced, and the cost performance is improved.

[0039] (Second Embodiment)

[0040] The second embodiment of the present utility model provides another insulating tape structure for a battery pack, which is characterized in that it includes two symmetric adhesive insulating tape assemblies arranged oppositely and a non-adhesive insulating tape disposed between the two adhesive insulating tape assemblies. The adhesive insulating tape assembly includes two or more unit adhesive insulating tapes spaced apart by a certain interval. The non-adhesive insulating tape is of a symmetric shape and its width is greater than the width of the adhesive insulating tape assembly. The two adhesive insulating tape assemblies and the non-adhesive insulating tape are integrally formed.

[0041] Figure 2 It is a schematic diagram of an example of the insulating tape structure for a battery pack according to the second embodiment of the present utility model. As Figure 2As shown, the insulating tape structure 10 for a battery pack includes two symmetrical adhesive insulating tape assemblies arranged opposite to each other and a non - adhesive insulating tape 8 disposed between the two adhesive insulating tape assemblies. Each adhesive insulating tape assembly includes two unit adhesive insulating tapes 9 spaced apart by a certain interval. The non - adhesive insulating tape 8 has a symmetrical shape and its width is greater than the width of the adhesive insulating tape assembly. The length and width of each of the adhesive insulating tape assembly and the non - adhesive insulating tape 8 can be adjusted according to the size of the battery pack and the number of batteries used. For example, the width of the non - adhesive insulating tape 8 can be designed according to the width of the top surface of the battery pack. The number of unit adhesive insulating tapes 9 included in the adhesive insulating tape assembly can also be more than two, and can be adjusted according to the size of the battery pack and the number of batteries used. The interval can also be adjusted according to the size of the battery pack and the number of batteries used.

[0042] The two adhesive insulating tape assemblies and the non - adhesive insulating tape 8 are integrally formed. The unit adhesive insulating tape 9 includes a base material and an adhesive 12 provided on the surface of the base material. Figure 2 The shaded part in [reference] is the adhesive 12 on the surface of the unit adhesive insulating tape 9.

[0043] Preferably, the base material of the unit adhesive insulating tape 9 is the same as the material of the non - adhesive insulating tape 8. An integral insulating cloth can be cut into a size corresponding to the insulating tape structure 10, and then the adhesive 12 is coated on the part corresponding to the adhesive insulating tape 9 of the insulating cloth, while the part corresponding to the non - adhesive insulating tape 8 remains unchanged without coating the adhesive.

[0044] The type and material of the insulating cloth and the type and material of the adhesive are the same as those described in the first embodiment, so the description is omitted here.

[0045] The unit adhesive insulating tape 9 is usually square, and can be rectangular or square. Its specific shape, length and width can be adjusted according to the shape and size of the battery pack used. Usually, the middle part of the non - adhesive insulating tape 8 is square, and the two side parts are square or arc - shaped. Its specific shape and size can be adjusted according to the shape and size of the battery pack used.

[0046] The insulating tape structure 10 is usually used to fix and insulate the electrode terminal components and functional components of the battery pack. In the use state, the non - adhesive insulating tape 8 of the insulating tape structure 10 covers the top surface of the battery pack, that is, a part of the electrode terminal components and the surface of the functional components, and the adhesive insulating tape assembly is adhered to the side surface of the battery pack.

[0047] In the insulating tape structure 10, the unit adhesive insulating tape 9 and the non-adhesive insulating tape 8 each have a symmetrical shape, and such a symmetrical shape enables the battery pack to be evenly adhered and fixed.

[0048] The insulating tape structure 10 can be applied to a primary battery or a secondary battery. The secondary battery can be a lithium secondary battery, a nickel-metal hydride secondary battery, etc.

[0049] Since the insulating tape structure 10 is integrally formed and used, the cost and operation man-hours can be reduced, and the cost performance is improved.

[0050] (Third Embodiment)

[0051] The third embodiment of the present invention provides a battery pack, characterized in that it has the insulating tape structure described in the first embodiment or the second embodiment.

[0052] The insulating tape structure serves to fix and insulate the electrode terminal components and functional components of the battery pack. That is, the non-adhesive insulating tape of the insulating tape structure is covered on the top surface of the battery pack, and the adhesive insulating tape is adhered to the side surface of the battery pack.

[0053] The functional components include a PTC component, an overcurrent protection component, a PCB board unit assembly, etc. The electrode terminal components include components such as a positive lead and a negative lead.

[0054] At the bottom of the battery pack, an insulating support plate having a load-bearing and fixing function is preferably provided, such as a fiberboard. The fiberboard is, for example, the METASTAR YT516 fiberboard of Yantai Mingshida Special Paper Co., Ltd.

[0055] Figure 3 It is a schematic diagram of an example of a battery pack with an insulating tape structure according to the third embodiment of the present invention.

[0056] As Figure 3 shown, the battery pack 20 includes three batteries arranged side by side, and electrode terminal components and functional components (only partially shown) that connect the three batteries in parallel or in series. The insulating tape structure used is Figure 2 the insulating tape structure described above. The non-adhesive insulating tape 4 of the insulating tape structure is covered on the top surface of the battery pack, that is, on a part of the electrode terminal components and the surface of the functional components, and the adhesive insulating tape 3 is adhered to the side surface of the battery pack, whereby the insulating tape structure plays a role in fixing, protecting and insulating the electrode terminal components and the functional components.

[0057] In addition, the number of batteries in the battery pack 20 can be more than three, the number of columns of the batteries can also be two or more, and the electrical connection mode of the battery pack can be to first connect in parallel within each column and then connect in series between the columns, or to first connect in series within each column and then connect in parallel between the columns. The specific electrical connection mode can be adjusted according to the output power and capacity of the battery pack required in actual situations, etc.

[0058] Positive lead wires or negative lead wires and other electrode terminal components are respectively connected to the ends of the electrode terminal pieces of the battery pack 20. In addition, the functional components provided on the battery pack 20 according to actual needs can be PTC components, overcurrent protection components, PCB board unit assemblies, etc. These functional components are insulated from each other by insulating sheet materials or insulating film materials to prevent bad situations such as short circuits from occurring between them. These functional components play a role during the charging and discharging processes of the battery pack by being connected to the control unit of the battery pack. For example, when an excessive current appears inside the battery pack due to a fault, the PTC component will act to protect the safe use of the battery pack.

[0059] In the battery pack 20, except for the connection between the electrode terminal pieces, the other adjacent parts between adjacent batteries are insulated, and this insulation effect is achieved through the insulating coating film or sheet material on the outer surface of a single battery. Moreover, adjacent batteries can be adhered together by an adhesive to fix the entire battery pack together.

[0060] An insulating support plate with a load-bearing and fixing function, such as a fiberboard, can also be provided on the bottom surface of the battery pack 20 according to actual needs.

[0061] Figure 4 FIG. is a schematic diagram of another example of the battery pack with an insulating tape structure according to the third embodiment of the present invention, which shows an example in which an insulating tape structure is adhered to a double-row battery pack, where the non-adhesive insulating tape 4 of the insulating tape structure is covered on the top surface of the battery pack, and the adhesive insulating tapes 3 are respectively adhered to the two side surfaces of the battery pack.

[0062] FIG. 5(a) and FIG. 5(b) are respectively schematic diagrams of the states of the battery pack according to the third embodiment of the present invention before and after the insulating tape structure is adhered.

[0063] As shown in FIGS. 5(a) and 5(b), the insulating tape structure can be directly adhered to the top surface of the battery pack by aligning it with the position of the top surface of the battery pack. Among them, the non-adhesive insulating tape 4 of the insulating tape structure covers the top surface of the battery pack, and the adhesive insulating tapes 3 are respectively adhered to the two side surfaces of the battery pack. The size and shape of the non-adhesive insulating tape correspond to the size and shape of the top surface of the battery pack, so that a part of the electrode terminal component 15 and the functional component 16 at the top surface of the battery pack can be covered.

[0064] Each component of the battery pack and its functions are the same as those described above and Figure 3 shown content, so the description is omitted here.

[0065] In this embodiment, the above-mentioned battery can be a primary battery or a secondary battery. The above-mentioned secondary battery is preferably various secondary batteries such as a lithium-ion secondary battery and a nickel-metal hydride secondary battery.

[0066] In the present utility model, although only a cylindrical battery is shown in the drawings, the battery itself can also be a square battery or a battery of other shapes. When the unit battery of the battery pack is a cuboid, the overall shape of the non-adhesive insulating tape is a rectangle, and the size of such a rectangle is set to be able to cover the functional component and at least a part of the electrode terminal component at the top surface of the battery pack.

[0067] In addition, the insulating tape structure for a battery pack of the present utility model has the effects of simplified structure, simple operation, low cost and good stability because the adhesive insulating tape and the non-adhesive insulating tape are integrally formed, and there is only an adhesive on the surface of the adhesive insulating tape. Moreover, it plays a good role in fixing and insulating and other safety protection for the electrode terminal component and the functional component on the surface of the battery pack, and the overall cost performance is high.

[0068] Other advantages and improvements of the present utility model will be easily conceived by those skilled in the art. Therefore, the scope of the present utility model is not limited by the above typical examples and specific details. Therefore, without departing from the spirit or scope of the general inventive concept defined by the above description, the present utility model can be variously changed and improved.

[0069] Industrial Applicability

[0070] The present utility model can provide an insulating tape structure for a battery pack with a simplified structure, simple operation, low cost and good stability, and a battery pack using the insulating tape structure.

Claims

1. An insulating tape structure for a battery pack, characterized in that: It comprises two symmetrical adhesive insulating tapes arranged opposite to each other and a non-adhesive insulating tape arranged between the two adhesive insulating tapes, wherein the non-adhesive insulating tape is symmetrical in shape and its width is greater than that of the adhesive insulating tape, and the two adhesive insulating tapes and the non-adhesive insulating tape are integrally formed into a cross shape.

2. The insulating tape structure according to claim 1, characterized in that: The adhesive insulating tape is in a square shape, and the middle part of the non-adhesive insulating tape is in a square shape, and the two side parts are in a square shape or an arc shape.

3. The insulating tape structure according to claim 1 or 2, characterized in that: The base material of the adhesive insulating tape is the same as that of the non-adhesive insulating tape.

4. The insulating tape structure according to claim 1 or 2, characterized in that: The adhesive insulating tape comprises a substrate and a self-adhesive adhesive disposed on the surface of the substrate.

5. An insulating tape structure for a battery pack, characterized in that: It comprises two symmetrical adhesive insulating tape components arranged opposite to each other and a non-adhesive insulating tape arranged between the two adhesive insulating tape components, the adhesive insulating tape components comprise two or more unit adhesive insulating tapes separated by a certain interval, the non-adhesive insulating tape is symmetrical in shape and its width is greater than the width of the adhesive insulating tape components, and the two adhesive insulating tape components and the non-adhesive insulating tape are formed integrally.

6. The insulating tape structure according to claim 5, characterized in that: The unit adhesive insulating tape is square, the middle part of the non-adhesive insulating tape is square, and the two side parts are square or arc-shaped.

7. The insulating tape structure according to claim 5 or 6, characterized in that: The base material of the unit adhesive insulating tape is the same as that of the non-adhesive insulating tape.

8. The insulating tape structure according to claim 5 or 6, characterized in that: The unit adhesive insulating tape comprises a substrate and a self-adhesive adhesive disposed on the surface of the substrate.

9. A battery pack, characterized in that: The insulating tape has the insulating tape structure according to any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that: The non-adhesive insulating tape of the insulating tape structure is covered on the top surface of the battery pack, and the adhesive insulating tape is adhered on the side surfaces of the battery pack.

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