Battery cell, battery cell module and battery pack

Abstract

The utility model provides a battery cell, a battery cell module and a battery pack, and relates to the field of battery cell insulation protection. The explosion-proof valve is located at the first end of the main body of the battery cell in the width direction, the insulating blue film in the insulating assembly wraps the two ends of the main body in the thickness direction and the second end of the main body in the width direction, an insulating sheet is bonded to the first end of the main body in the width direction, and an avoiding hole corresponding to the explosion-proof valve is formed in the insulating sheet. Therefore, the requirement on the coating precision of the insulating blue film is low, the process cost is effectively reduced, and the production efficiency is improved; besides, compared with an insulating blue film, the insulating sheet is more convenient to position, after the battery cell is fixed, the battery cell can be vertically attached to the first end in the width direction of the battery cell, and the normal action of the anti-explosion valve cannot be influenced by the arrangement of the avoiding hole.

Description

Technical Field

[0001] The present application relates to the field of battery cell insulation protection, and in particular to a battery cell, a battery cell module and a battery pack. Background Art

[0002] At present, it is usually adopted to coat the outside of the battery cell shell with an insulating blue film as an insulating protection structure for the battery cell. However, an explosion-proof valve is provided at the battery cell shell, and the insulating blue film coated on the outside of the explosion-proof valve will affect its normal outward opening action, seriously affecting the safety performance of the battery cell. If the insulating blue film is directly opened at the corresponding hole at the explosion-proof valve, in order to meet the insulation requirements and creepage distance requirements of the battery cell, the coating equipment needs to be positioned multiple times, which is not conducive to the automatic production of the coating equipment, and the scrap rate and rework cost are both high. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery cell, a battery cell module and a battery pack to solve the problem that the insulation protection structure of the existing battery cell will affect the safety performance of the battery cell.

[0004] According to the above purpose, the first aspect of the present utility model provides a battery cell, wherein the battery cell comprises:

[0005] A main body, wherein a first end of the main body in a width direction is provided with an explosion-proof valve; and

[0006] The insulating component includes an insulating sheet and an insulating blue film, wherein the insulating sheet is bonded to the first end of the main body in the width direction and is formed with an avoidance hole corresponding to the explosion-proof valve; the insulating blue film is coated on both ends of the main body in the thickness direction and the second end in the width direction.

[0007] Preferably, the thickness of the insulating sheet is formed to be T, 0.1 mm<T<1 mm.

[0008] Preferably, when the insulating sheet is bonded to the main body, along the thickness direction of the main body, the distance between the outer edge of the insulating sheet and the corresponding outer edge of the main body is formed to be L 1 , 0.05mm<L 1 <0.2mm.

[0009] Preferably, when the insulating sheet is bonded to the main body, the distance between the inner edge of the avoidance hole and the compacted edge of the explosion-proof valve is L 2 , 0.3mm<L 2 <2mm.

[0010] Preferably, when the insulating sheet is bonded to the main body, along the thickness direction of the main body, the distance between the inner edge of the avoidance hole and the outer edge of the insulating sheet is W, and W>1.5 mm.

[0011] Preferably, the insulating blue film is bonded to the corresponding side wall of the main body.

[0012] Preferably, cover plate assemblies are respectively provided at both ends of the main body in the length direction.

[0013] According to a second aspect of the utility model, a battery cell module is provided, wherein the battery cell module is provided with the battery cell as described above.

[0014] According to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the battery cell module as described above.

[0015] According to the battery cell, battery cell module and battery pack of the utility model, the explosion-proof valve is located at the first end of the battery cell in the width direction, and the insulating blue film in the insulating component is coated on both ends in the thickness direction of the main body and the second end in the width direction. The first end in the width direction of the main body is bonded with an insulating sheet, and the insulating sheet is formed with an avoidance hole corresponding to the explosion-proof valve. In this way, the coating accuracy requirements for the insulating blue film are relatively low, which effectively reduces the process cost and improves the production efficiency; in addition, the insulating sheet is easier to position than the insulating blue film. When the battery cell is fixed, it can be vertically attached to the first end in the width direction of the battery cell, and the setting of the avoidance hole will not affect the normal operation of the explosion-proof valve.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is an exploded view of a battery cell according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the assembly of the insulating sheet and the main body according to an embodiment of the utility model;

[0020] Figure 3 It is an enlarged schematic diagram of point A according to an embodiment of the utility model.

[0021] Icon: 1-main body; 10-explosion-proof valve; 11-cover assembly; 20-insulating blue film; 21-insulating sheet; 210-avoidance hole. DETAILED DESCRIPTION

[0022] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0023] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0024] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0025] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0026] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0027] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0028] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0029] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0030] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0031] According to a first aspect of the present invention, a battery cell is provided, such as Figures 1 to 3 As shown, the battery cell in this embodiment includes a main body 1 and an insulating component connected to the main body 1, through which the insulating component can provide insulation protection for the battery cell to ensure the safety of the battery cell when in use.

[0032] In this embodiment, if Figure 1As shown, an explosion-proof valve 10 is provided at the first end of the width direction of the main body 1, and a cover assembly 11 is provided at both ends of the length direction of the main body 1. The insulating assembly includes an insulating blue film 20, which is coated on both ends of the thickness direction of the main body 1 and the second end of the width direction of the main body 1. Based on the coating position of the insulating blue film 20, the requirements for its coating accuracy are low and the coating difficulty is also low, which can effectively reduce the process cost and improve production efficiency. It should be noted that the coating of the insulating blue film 20 can be carried out by using existing coating equipment, and the connection method between it and the shell is not fixed. For example, the insulating blue film 20 and the main body 1 in this embodiment are fixed by bonding.

[0033] In addition, if Figures 2 to 3 As shown, the insulating assembly also includes an insulating sheet 21 bonded to the first end of the main body 1 in the width direction, and the insulating sheet 21 is also formed with an avoidance hole 210 corresponding to the explosion-proof valve 10 to facilitate the outward opening of the explosion-proof valve 10. In order to meet the insulation requirements and creepage distance requirements of the battery cell and to ensure the normal use characteristics and safety performance of the battery cell, the thickness of the insulating sheet 21 is set to T (the thickness includes the back glue of the insulating sheet 21), 0.1mm<T<1mm; when the insulating sheet 21 is bonded to the main body 1, along the thickness direction of the main body 1, the single-side gap between the insulating sheet 21 and the main body 1 is set to L 1 , 0.05mm<L 1 <0.2mm; set the distance between the inner edge of the avoidance hole 210 and the outer edge of the insulating sheet 21 to W, W>1.5mm; In addition, set the distance between the inner edge of the avoidance hole 210 and the compacted edge of the explosion-proof valve 10 to L 2 , 0.3mm<L 2 The above values ​​are the optimal ranges obtained through many experiments to ensure the safe use of the battery cell, but there is no limitation on the specific assembly dimensions of the insulating sheet 21 and the main body 1 .

[0034] It should be noted that before the insulating sheet 21 is bonded to the main body 1, the main body 1 can be fixed to a preset position to achieve the positioning of the main body 1, and then the insulating sheet 21 can be positioned relative to the main body 1 using, for example, a CCD device, and then attached. In addition, the material of the insulating sheet 21 is not specifically limited, and should be considered from multiple dimensions such as strength, wear resistance, and flame retardancy.

[0035] According to the battery cell of the utility model, the explosion-proof valve 10 is located at the first end of the main body 1 in the width direction of the battery cell, and the insulating blue film 20 in the insulating component is coated on both ends in the thickness direction and the second end in the width direction of the main body 1. The first end in the width direction of the main body 1 is bonded with an insulating sheet 21, and the insulating sheet 21 is formed with an avoidance hole 210 corresponding to the explosion-proof valve 10. In this way, the coating accuracy requirements for the insulating blue film 20 are relatively low, which effectively reduces the process cost and improves the production efficiency; in addition, the insulating sheet 21 is easier to position than the insulating blue film 20. When the battery cell is fixed, it can be vertically attached to the first end in the width direction of the battery cell, and the setting of the avoidance hole 210 will not affect the normal operation of the explosion-proof valve 10.

[0036] According to a second aspect of the utility model, a battery cell module is provided, the battery cell module comprising the battery cell as described above.

[0037] According to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the battery cell module as described above.

[0038] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery cell, characterized in that: The battery cell comprises: A main body, wherein a first end of the main body in a width direction is provided with an explosion-proof valve; and The insulating component includes an insulating sheet and an insulating blue film, wherein the insulating sheet is bonded to the first end of the main body in the width direction and is formed with an avoidance hole corresponding to the explosion-proof valve; the insulating blue film is coated on both ends of the main body in the thickness direction and the second end in the width direction.

2. The battery cell according to claim 1, characterized in that: The thickness of the insulating sheet is formed to be T, 0.1 mm<T<1 mm.

3. The battery cell according to claim 1, characterized in that: When the insulating sheet is bonded to the main body, along the thickness direction of the main body, the distance between the outer edge of the insulating sheet and the corresponding outer edge of the main body is formed to be L1, 0.05 mm < L1 < 0.2 mm.

4. The battery cell according to claim 1, characterized in that: When the insulating sheet is bonded to the main body correspondingly, the distance between the inner edge of the avoidance hole and the compacted edge of the explosion-proof valve is L2, 0.3 mm<L2<2 mm.

5. The battery cell according to claim 1, characterized in that: When the insulating sheet is bonded to the main body, along the thickness direction of the main body, the distance between the inner edge of the avoidance hole and the outer edge of the insulating sheet is W, where W>1.5 mm.

6. The battery cell according to claim 1, characterized in that: The insulating blue film is bonded to the corresponding side wall of the main body.

7. The battery cell according to claim 1, characterized in that: Cover plate assemblies are respectively arranged at both ends of the main body in the length direction.

8. A battery cell module, characterized in that: The battery cell module is provided with the battery cell according to any one of claims 1 to 7.

9. A battery pack, characterized in that: The battery pack is provided with the battery cell module as claimed in claim 8.

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