Battery cell and battery cell module
By setting two pole groups in the battery cell and stably connecting them with the housing assembly through the connecting piece, the problem of small capacity of the existing battery cell is solved, and the battery capacity is increased and the stability of pole group connection is achieved.
Patent Information
- Application Number
- CN202420357390.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The existing battery cells are only equipped with one pole group, which results in a small battery capacity and cannot meet the needs of large-capacity batteries.
A battery cell is designed, which includes two pole groups: a first pole group and a second pole group. The two ends of the pole group form electrodes respectively, and are stably connected to the housing assembly through a connecting piece to form a bent portion to enhance the Connection stability.
By adding two pole groups, the capacity of the battery is effectively improved, while ensuring the stable connection between the pole group and the housing assembly, ensuring the overall performance of the battery.
Smart Images
Figure CN222530595U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery cell structures, and in particular to a battery cell and a battery cell module. Background Art
[0002] The existing blade battery cell is only provided with one electrode group, which results in a smaller capacity of the battery cell and thus cannot meet the trend of battery development towards larger capacity. Utility Model Content
[0003] In view of this, the purpose of the present application is to provide a battery cell and a battery cell module to solve the problem that the existing battery cell is only provided with one electrode group, thereby resulting in a small battery cell capacity.
[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 pole group assembly, comprising at least a first pole group and a second pole group; first pole ears are formed at both ends of the first pole group, and second pole ears are formed at both ends of the second pole group; the first pole group and the second pole group are stacked in sequence, so that the first pole ear and the corresponding second pole ear form a first bending portion; and
[0006] The shell assembly, the pole group assembly is arranged inside the shell assembly, the shell assembly is provided with a connecting piece, and the connecting piece is formed with a second bending portion that can be connected to the first bending portion.
[0007] Preferably, the first pole lug comprises a first fixing portion and a first thin sheet portion connected in sequence; the first thin sheet portion is located at one end of the first fixing portion close to the second pole group.
[0008] Preferably, the first fixing portion is formed as a wedge-shaped structure, and the first fixing portion is in contact with the side of the first pole group; the first thin sheet portion is bent in a direction away from the second pole group so that a first angle is formed between the first thin sheet portion and the inclined surface of the first fixing portion.
[0009] Preferably, the second pole tab comprises a second fixing portion and a second thin sheet portion connected in sequence; the second thin sheet portion is located at one end of the second fixing portion close to the first pole group.
[0010] Preferably, the second fixing portion is formed into a wedge-shaped structure, and the second fixing portion is in contact with the side of the second pole ear; the second thin sheet portion extends toward the first pole group, and the extension direction of the second thin sheet portion is the same as the inclination direction of the inclined surface of the second fixing portion, so that a second angle is formed between the right-angle surface of the second fixing portion, the second thin sheet portion and the side of the first pole group.
[0011] Preferably, when the first pole group and the second pole group are stacked, the first pole lug and the corresponding second pole lug are arranged along the width direction of the battery cell, so that the first angle and the second angle form the first bending portion.
[0012] Preferably, the first sheet portion and the second sheet portion extend in the same direction.
[0013] Preferably, the connecting piece is bent to form a C-shaped structure.
[0014] Preferably, the housing assembly further includes a main housing, an end plate and a cover plate.
[0015] According to a second aspect of the utility model, a battery cell module is provided, wherein the battery cell module comprises the battery cell described above.
[0016] According to the battery cell and battery cell module of the present invention, two pole groups are arranged in the battery cell, so that the capacity of the battery can be effectively increased; in addition, first pole ears are formed at both ends of the first pole group in the present invention, and second pole ears are formed at both ends of the second pole group; the first pole group and the second pole group are stacked in sequence so that the first pole ear and the corresponding second pole ear form a first bending portion, and then a second bending portion that can be connected to the first bending portion is arranged on the connecting sheet, so that the two pole groups can be stably connected to the shell assembly, that is, the stability of the pole group connection can be guaranteed while increasing the number of pole groups to improve the battery capacity.
[0017] 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
[0018] 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.
[0019] Figure 1 is an exploded schematic diagram of a battery cell according to an embodiment of the utility model;
[0020] Figure 2 is a partial schematic diagram of a pole group assembly according to an embodiment of the utility model;
[0021] Figure 3 is a schematic diagram of a bent connecting sheet according to an embodiment of the utility model;
[0022] Figure 4 It is a partial assembly diagram of the connecting piece and the pole group component according to an embodiment of the utility model.
[0023] Icons: 10-main shell; 11-positive electrode cover plate; 12-negative electrode cover plate; 13-positive terminal plate; 14-connecting plate; 140-second bending portion; 2-pole group assembly; 20-first pole group; 21-first pole ear; 210-first fixing portion; 211-first thin sheet portion; 22-second pole group; 23-second pole ear; 230-second fixing portion; 231-second thin sheet portion. DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] 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.
[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] like Figures 1 to 4As shown, according to the first aspect of the utility model, a battery cell is provided, the battery cell includes a pole group assembly 2 and a shell assembly, the pole group assembly 2 is arranged inside the shell assembly; further, the pole group assembly 2 in this embodiment includes a first pole group 20 and a second pole group 22, so that the capacity of the battery cell and even the entire battery can be effectively improved. In the following, the specific structure of the above-mentioned parts of the battery cell according to the utility model will be described in detail.
[0034] In this embodiment, if Figure 2 As shown, the first pole group 20 and the second pole group 22 are stacked in sequence, and the stacking direction of the two is formed as the thickness direction of the battery cell. Specifically, along the length direction of the battery cell, the first pole group 20 is formed with a first pole ear 21 at both ends, and the second pole group 22 is formed with a second pole ear 23 at both ends. When the first pole group 20 and the second pole group 22 are stacked, the first pole ear 21 and the corresponding second pole ear 23 form a first bending portion.
[0035] More specifically, the first pole tab 21 includes a first fixing portion 210 and a first thin sheet portion 211 connected in sequence, and the first thin sheet portion 211 is located at one end of the first fixing portion 210 close to the second pole group 22. In addition, the first fixing portion 210 is formed into a wedge-shaped structure, and (the right-angled side of) the first fixing portion 210 is in contact with the side of the first pole group 20, and the first thin sheet portion 211 is bent in a direction away from the second pole group 22, so that a first angle is formed between the first thin sheet portion 211 and the inclined surface of the first fixing portion 210.
[0036] Similarly, the second pole tab 23 includes a second fixing portion 230 and a second thin sheet portion 231 connected in sequence, and the second thin sheet portion 231 is located at one end of the second fixing portion 230 close to the first pole group 20. The second fixing portion 230 is also formed into a wedge-shaped structure, and (the right-angled side of) the second fixing portion 230 is in contact with the side of the second pole tab 23, and the second thin sheet portion 231 extends toward the first pole group 20, and the extension direction of the second thin sheet portion 231 is the same as the inclination direction of the inclined surface of the second fixing portion 230, so that a second angle is formed between the right-angled surface of the second fixing portion 230, the second thin sheet portion 231 and the side of the first pole group 20.
[0037] In this way, when the first pole group 20 and the second pole group 22 are stacked, the first pole ear 21 and the corresponding second pole ear 23 are arranged along the width direction of the battery cell, and the extension direction of the first thin sheet portion 211 and the second thin sheet portion 231 is the same, so that the first angle and the second angle form the first bending portion.
[0038] In this embodiment, if Figure 1As shown, the shell assembly includes a main shell 10, a positive cover plate 11, a negative cover plate 12, a positive terminal plate 13 and two connecting plates 14, each of which is formed with a second bending portion 140 that can be connected to the first bending portion.
[0039] Specifically, Figure 3 to Figure 4 As shown, the connecting piece 14 is bent to form a C-shaped structure. In this way, the first pole group 20 and the second pole group 22 are wrapped by Mylar (insulating sheet-pp material) and then placed inside the main shell 10, and the two ends of the pole group assembly 2 in the length direction are respectively formed with a positive pole ear and a negative pole ear (the positive pole ear and the negative pole ear are composed of a first pole ear 21 and a second pole ear 23); further, the positive pole ear passes through the positive terminal plate 13 and is correspondingly clamped and welded with the connecting piece 14 on the positive cover plate 11, and the positive terminal plate 13 provides sufficient bending space for the connecting piece 14 and the positive pole ear; in addition, the negative pole ear is directly clamped and welded with the connecting piece 14 on the negative cover plate 12; further, the positive cover plate 11 and the negative cover plate 12 are correspondingly sealed and welded with the main shell 10, that is, it can be formed into the battery cell in this embodiment.
[0040] According to the battery cell of the present invention, two pole groups are arranged in the battery cell, so that the capacity of the battery can be effectively increased; in addition, first pole ears 21 are respectively formed at both ends of the first pole group 20 in the present invention, and second pole ears 23 are respectively formed at both ends of the second pole group 22; the first pole group 20 and the second pole group 22 are stacked in sequence, so that the first pole ear 21 and the corresponding second pole ear 23 form a first bending portion, and then a second bending portion 140 that can be connected to the first bending portion is arranged on the connecting sheet 14, so that the two pole groups can be stably connected to the shell assembly, that is, the stability of the pole group connection can be guaranteed while increasing the number of pole groups to improve the battery capacity.
[0041] According to a second aspect of the utility model, a battery cell module is provided, wherein the battery cell module comprises the battery cell as described above.
[0042] 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 pole group assembly, comprising at least a first pole group and a second pole group; first pole ears are formed at both ends of the first pole group, and second pole ears are formed at both ends of the second pole group; the first pole group and the second pole group are stacked in sequence, so that the first pole ear and the corresponding second pole ear form a first bending portion; and The shell assembly, the pole group assembly is arranged inside the shell assembly, the shell assembly is provided with a connecting piece, and the connecting piece is formed with a second bending portion that can be connected to the first bending portion.
2. The battery cell according to claim 1, characterized in that: The first pole lug includes a first fixing portion and a first thin sheet portion which are connected in sequence; the first thin sheet portion is located at one end of the first fixing portion close to the second pole group.
3. The battery cell according to claim 2, characterized in that: The first fixing portion is formed into a wedge-shaped structure and is in contact with a side of the first pole group; the first thin sheet portion is bent in a direction away from the second pole group so that a first angle is formed between the first thin sheet portion and an inclined surface of the first fixing portion.
4. The battery cell according to claim 3, characterized in that: The second pole tab includes a second fixing portion and a second thin sheet portion connected in sequence; the second thin sheet portion is located at one end of the second fixing portion close to the first pole group.
5. The battery cell according to claim 4, characterized in that: The second fixing portion is formed into a wedge-shaped structure, and the second fixing portion is in contact with the side of the second pole ear; the second thin sheet portion extends toward the first pole group, and the extension direction of the second thin sheet portion is the same as the inclination direction of the inclined surface of the second fixing portion, so that a second angle is formed between the right-angle surface of the second fixing portion, the second thin sheet portion and the side of the first pole group.
6. The battery cell according to claim 5, characterized in that: When the first pole group and the second pole group are stacked, the first pole tab and the corresponding second pole tab are arranged along the width direction of the battery cell, so that the first angle and the second angle form the first bending portion.
7. The battery cell according to claim 5, characterized in that: The first sheet portion and the second sheet portion extend in the same direction.
8. The battery cell according to claim 1, characterized in that: The connecting piece is bent to form a C-shaped structure.
9. The battery cell according to claim 1, characterized in that: The housing assembly further comprises a main housing, an end plate and a cover plate.
10. A battery cell module, characterized in that: The battery cell module comprises the battery cell according to any one of claims 1 to 9.