Bare cell insulation sheet, battery monomer and power device

Abstract

The utility model discloses a bare cell insulating sheet, a battery monomer and a power device, the bare cell insulating sheet comprises an insulating sheet body, the insulating sheet body is used for wrapping a pole group, a positioning part is formed on the insulating sheet body, and the positioning part is used for positioning a side plate. According to the bare cell insulating strip disclosed by the utility model, the positioning part is arranged on the insulating strip body, so that the effect of fixing the side plate is achieved, the condition of poor cell assembly caused by bending deformation of the side plate can be effectively avoided, the product quality of the bare cell insulating strip is improved, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power device manufacturing, in particular to a bare battery core insulating sheet, a battery cell and a power device. Background Art

[0002] The relevant technology points out that as lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing. The bare cell insulation sheet is an important component of the blade cell, and its main function is to protect the electrode group and avoid short circuit of the electrode group.

[0003] The traditional bare cell insulation sheet is generally rectangular in structure, with indentations designed according to the size of the pole group for easy bending, and positioning holes on the short side for clamping and positioning. The side panels are placed on the side of the insulation sheet for hot-melt welding. Since the length and width of the blade battery side panels are relatively large, the side panels of the battery cells are prone to bending and deformation; after the side panels are placed on the bare cell insulation sheet, they bend beyond the folds, and the side panels and the bare cell insulation sheet are fixed by hot-melt, making it difficult for the bare cell insulation sheet to wrap around the pole group. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a bare cell insulation sheet, which can fix the side plate and effectively prevent the side plate from bending and deformation.

[0005] The utility model also provides a battery monomer having the bare battery core insulating sheet.

[0006] The utility model also provides a power device.

[0007] The bare cell insulating sheet according to the first aspect of the utility model comprises: an insulating sheet body, the insulating sheet body is used to cover the electrode group, and a positioning part is formed on the insulating sheet body, and the positioning part is used to position the side plate.

[0008] According to the bare cell insulating sheet of the utility model, a positioning portion is provided on the insulating sheet body, which plays a role in fixing the side plates and can effectively prevent the side plates from bending and deforming, resulting in poor assembly of the battery cells, thereby improving the product quality of the bare cell insulating sheet and reducing the failure rate.

[0009] In some embodiments, the positioning portion is formed as a positioning opening, the positioning opening is formed with a first section, the first section extends along the length direction of the insulating sheet, the positioning opening is formed with a second section and a third section, the second section and the third section extend along the width direction of the insulating sheet, and the second section and the third section are respectively connected to both ends of the first section.

[0010] In some embodiments, a positioning piece is formed around the periphery of the positioning opening, one end of the positioning piece in the width direction is connected to the insulating sheet body, and the other end of the positioning piece in the width direction extends to and covers the positioning opening.

[0011] In some embodiments, the positioning pieces include two, one ends of the two positioning pieces are respectively connected to two side edges of the positioning opening in the width direction, and the other ends of the positioning pieces extend toward each other.

[0012] In some embodiments, the positioning portion includes a plurality of positioning portions, and the plurality of positioning portions are arranged at intervals in the length direction of the insulation sheet body.

[0013] The battery cell according to the second aspect of the utility model comprises: a side plate, the side plate is formed with a narrow section; the bare battery cell insulating sheet according to the first aspect of the utility model, the narrow section is arranged in the positioning opening.

[0014] According to the battery cell of the utility model, by providing the bare cell insulating sheet of the first aspect, the product quality of the battery cell is improved, the damage rate of the battery cell is reduced, and the assembly steps of the battery cell are simplified.

[0015] In some embodiments, the narrow section includes a plurality of narrow sections, and the plurality of narrow sections are arranged in one-to-one correspondence with the plurality of positioning openings.

[0016] In some embodiments, the side panel is formed with a plurality of wide sections, and one narrow section is connected between every two wide sections.

[0017] In some embodiments, the side plate is connected to the bare cell insulation sheet by thermal melting.

[0018] The power device according to the third aspect of the utility model comprises the battery cell according to the second aspect of the utility model.

[0019] According to the power device of the utility model, by providing the battery monomer of the second aspect, the risk factor of the power device is reduced, and the safety performance and product quality of the power device are improved.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a bare cell insulating sheet according to an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the assembly of the bare cell insulation sheet and the side plate shown in ;

[0023] Figure 3 yes Figure 2 Schematic diagram of the assembly of the bare cell insulation sheet and the side plate from another perspective shown in FIG.

[0024] Reference numerals:

[0025] 100, bare cell insulating sheet; 101, insulating sheet body; 1, positioning opening; 11, first section; 12, second section; 13, third section; 14, positioning sheet; 200, side panel; 201, narrow section; 202, wide section. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] Reference below Figure 1-Figure 3 A bare cell insulation sheet 100 according to an embodiment of the first aspect of the utility model is described.

[0028] like Figure 1 As shown, the bare cell insulating sheet 100 according to the first embodiment of the utility model comprises: an insulating sheet body 101, the insulating sheet body 101 is used to cover the electrode group, and a positioning part is formed on the insulating sheet body 101, and the positioning part is used to position the side plate 200. Therefore, the structure of the positioning part is simple, and the side plate 200 and the insulating sheet body 101 are easy to assemble.

[0029] According to the bare cell insulating sheet 100 of the embodiment of the utility model, a positioning portion is provided on the insulating sheet body 101, so as to fix the side plate 200 and effectively prevent the side plate 200 from bending and deforming, which would lead to poor assembly of the battery cell, thereby improving the product quality of the battery cell and reducing the failure rate.

[0030] In some embodiments of the utility model, the positioning portion is formed as a positioning opening 1, the positioning opening 1 is formed with a first section 11, the first section 11 extends along the length direction of the insulating sheet, the positioning opening 1 is formed with a second section 12 and a third section 13, the second section 12 and the third section 13 extend along the width direction of the insulating sheet, and the second section 12 and the third section 13 are respectively connected to the two ends of the first section 11. It can be understood that the positioning opening 1 is formed as an I-shaped opening. Therefore, the positioning opening 1 has a simple structure, a clever design, and is easy to produce.

[0031] In some embodiments of the present invention, Figure 2As shown, a positioning piece 14 is formed around the circumference of the positioning opening 1, one end of the positioning piece 14 in the width direction is connected to the insulating sheet body 101, and the other end of the positioning piece 14 in the width direction extends to cover the positioning opening 1. Therefore, the positioning piece 14 is provided to further fix the side plate 200, improve the positioning strength of the positioning part to the side plate 200, further avoid the displacement of the side plate 200, further improve the product quality of the battery cell, and the structure is simple and easy to produce.

[0032] In some embodiments of the present invention, the positioning pieces 14 include two, one end of each of the two positioning pieces 14 is connected to the two side edges in the width direction of the positioning opening 1, and the other ends of the positioning pieces 14 extend toward each other. Thus, the bare cell insulating sheet 100 has a simple structure, and the two insulating sheets can further prevent the side plate 200 from shifting in the direction of the wide section 202 of the side plate 200, which is a clever design.

[0033] In some embodiments of the present invention, Figure 1 As shown, the positioning parts include a plurality of positioning parts, and the plurality of positioning parts are arranged at intervals in the length direction of the insulating sheet body 101. Thus, the plurality of positioning parts can further position the side plate 200, better prevent the side plate 200 from shifting, and have higher reliability.

[0034] The battery cell according to the second embodiment of the utility model comprises: a side plate 200 and a bare cell insulating sheet 100 according to the first embodiment of the utility model, wherein the side plate 200 is formed with a narrow section 201 which is arranged in the positioning opening 1 of the bare cell insulating sheet 100 .

[0035] According to the battery cell of the embodiment of the utility model, by providing the bare cell insulating sheet 100 of the first embodiment, the product quality of the battery cell is improved, the damage rate of the battery cell is reduced, and the assembly steps of the battery cell are simplified.

[0036] In some embodiments of the present invention, the narrow section 201 includes a plurality of narrow sections 201, and the plurality of narrow sections 201 are arranged in one-to-one correspondence with the plurality of positioning openings 1. Thus, the side panel 200 can be better fixed without affecting the normal use of the side panel 200.

[0037] In some embodiments of the present invention, the side plate 200 is formed with a plurality of wide sections 202, and a narrow section 201 is connected between every two wide sections 202. Figure 2 As shown, two ends of a narrow section 201 are respectively connected to a wide section 202. Thus, the side plate 200 has a simple structure, an ingenious design, and is easy to produce and manufacture.

[0038] In some embodiments of the present invention, the side plate 200 is connected to the bare cell insulating sheet 100 by heat melting, thereby simplifying the connection method, reducing the difficulty of assembling the battery cell, and improving the production efficiency of the battery cell.

[0039] The power device according to the embodiment of the third aspect of the utility model comprises a battery cell according to the embodiment of the second aspect of the utility model.

[0040] According to the power device of the embodiment of the utility model, by disposing the battery monomer of the above-mentioned second aspect embodiment, the risk factor of the power device is reduced, and the safety performance and product quality of the power device are improved.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bare cell insulating sheet, characterized in that: include: An insulating sheet body, the insulating sheet body is used to cover the pole group, a positioning portion is formed on the insulating sheet body, the positioning portion is used to position the side plate, the positioning portion is formed as a positioning opening, the positioning opening is formed with a first section, the first section extends along the length direction of the insulating sheet, the positioning opening is formed with a second section and a third section, the second section and the third section extend along the width direction of the insulating sheet, and the second section and the third section are respectively connected to the two ends of the first section.

2. The bare cell insulating sheet according to claim 1, characterized in that: A positioning piece is formed on the periphery of the positioning opening, one end of the positioning piece in the width direction is connected to the insulating sheet body, and the other end of the positioning piece in the width direction extends to cover the positioning opening.

3. The bare cell insulating sheet according to claim 2, characterized in that: The positioning pieces include two, one ends of the two positioning pieces are respectively connected to the two side edges of the positioning opening in the width direction, and the other ends of the positioning pieces extend toward each other.

4. The bare cell insulating sheet according to any one of claims 1 to 3, characterized in that: The plurality of positioning portions are arranged at intervals in the length direction of the insulation sheet body.

5. A battery cell, characterized in that: include: a side panel, the side panel being formed with a narrow section; The bare cell insulating sheet according to any one of claims 1 to 4, wherein the narrow section is arranged in a positioning opening of the bare cell insulating sheet.

6. The battery cell according to claim 5, characterized in that: The narrow sections include a plurality of narrow sections, and the plurality of narrow sections are arranged in one-to-one correspondence with the plurality of positioning openings.

7. The battery cell according to claim 6, characterized in that: The side plate is formed with a plurality of wide sections, and one narrow section is connected between every two wide sections.

8. The battery cell according to any one of claims 5 to 7, characterized in that: The side plate is connected to the bare cell insulation sheet by thermal melting.

9. A power device, characterized in that: A battery cell comprising the battery cell according to any one of claims 5 to 8.

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