Square steel shell structure and battery

Abstract

The utility model relates to the technical field of lithium ion batteries, and discloses a square steel shell structure and a battery. The square steel shell structure comprises a square shell provided with a battery cell mounting groove and a cover plate used for blocking a notch of the battery cell mounting groove; a plurality of reinforcing columns are fixedly arranged at the groove bottom of the battery cell mounting groove; and one end, far away from the groove bottom of the battery cell mounting groove, of the reinforcing column is fixedly connected with the cover plate. According to the square steel shell battery cell, the fixing columns are additionally arranged in the square shell, and the square shell and the cover plate are fixed, so that the whole battery cell is subjected to segmented reinforcement, the deformation resistance of each part of the square steel shell structure is enhanced, the problem that the square steel shell structure is easy to deform is effectively solved, and the service life of the square steel shell battery cell is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion batteries, in particular to a square steel shell structure and a battery. Background Art

[0002] Lithium-ion batteries are widely used in 3C electronic products due to their flexible and adaptable nature. With the increasing energy density and environmental protection requirements of batteries, square steel-cased batteries have become the preferred choice. However, the surface deformation problem of square steel-cased batteries after molding has always been difficult to improve. This deformation problem may cause the battery cell to be loosely fixed, uneven pressure on the stacked cores, and uneven current distribution within the battery cell. In severe cases, it may even cause the battery cell to catch fire and explode.

[0003] Therefore, for square steel shell battery cells, how to avoid deformation during molding and use as much as possible and improve the service life of square steel shell battery cells has become a technical problem that needs to be solved urgently by those skilled in the art.

[0004] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Utility Model Content

[0005] The purpose of the present utility model is to provide a square steel shell structure and a battery to solve or at least partially solve the technical problems existing in the prior art.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a square steel shell structure, comprising a square shell provided with a battery cell mounting slot and a cover plate for blocking the notch of the battery cell mounting slot;

[0008] A plurality of reinforcing columns are fixedly provided on the bottom of the battery cell installation groove; one end of the reinforcing column away from the bottom of the battery cell installation groove is fixedly connected to the cover plate.

[0009] Optionally, the plurality of reinforcement columns are evenly distributed in the battery cell mounting grooves.

[0010] Optionally, the plurality of reinforcement columns are arrayed and distributed in the battery cell mounting groove;

[0011] In the length direction of the square shell, the distance between two adjacent reinforcing columns is 15 mm; in the width direction of the square shell, the distance between two adjacent reinforcing columns is 5 mm.

[0012] Optionally, the reinforcement column is cylindrical, and the diameter of the reinforcement column is the same as the diameter of the electrode of the battery cell.

[0013] Optionally, welding pads are respectively provided on the cover plate at positions corresponding to the reinforcement columns, and the reinforcement columns and the welding pads are fixed by laser welding.

[0014] Optionally, the edge of the cover plate is sealed to the edge of the battery cell mounting groove.

[0015] In a second aspect, the utility model provides a battery, comprising a hollow shell and a battery cell installed in the shell, wherein the shell adopts the square steel shell structure as described above.

[0016] Optionally, the battery cell is provided with avoidance holes at positions corresponding to the reinforcement columns;

[0017] The plurality of reinforcing columns respectively pass through corresponding avoidance through-holes to limit the battery cell in the battery cell installation groove, and the cover plate abuts against a side surface of the battery cell away from the groove bottom.

[0018] Optionally, the battery cell adopts a stacked core structure; the positive and negative tabs of the battery cell are respectively distributed at both ends of the battery cell.

[0019] Optionally, the battery is a lithium battery.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The square steel shell structure provided by the utility model fixes the square shell and the cover plate by adding fixing columns inside the square shell, which is equivalent to reinforcing the entire battery cell in sections to enhance the deformation resistance of each part of the square steel shell structure, effectively improving the problem that the square steel shell structure is prone to deformation and increasing the service life of the square steel shell battery cell.

[0022] The present invention has other features and advantages, which will be apparent from the accompanying drawings and subsequent detailed descriptions incorporated herein, or will be described in detail in the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1This is a structural schematic diagram of a square shell of a square steel shell structure provided by an embodiment of the present invention.

[0025] Figure 2 This is a structural schematic diagram of a cover plate with a square steel shell structure provided by an embodiment of the utility model.

[0026] In the figure: 10, square shell; 11, battery cell mounting slot; 20, reinforcement column; 30, cover plate; 31, welding pad. DETAILED DESCRIPTION

[0027] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0028] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0029] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0031] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.

[0032] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0033] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.

[0034] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0035] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; 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 those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] Example 1:

[0037] See also Figure 1 and Figure 2 , Figure 1 This is a schematic structural diagram of a square shell of a square steel shell structure provided by an embodiment of the utility model. Figure 2This is a structural schematic diagram of a cover plate with a square steel shell structure provided by an embodiment of the utility model.

[0038] The square steel shell structure provided in this embodiment includes a square shell 10 and a cover plate 30;

[0039] Among them, such as Figure 1 As shown, the square shell 10 is a shell provided with a battery cell installation groove 11, and a plurality of reinforcing columns 20 are fixedly provided at the bottom of the battery cell installation groove 11;

[0040] The cover plate 30 is used to block the notch of the battery cell installation groove 11, and together with the square shell 10, encloses an inner cavity structure of a square steel shell structure; the battery cell is installed in the inner cavity structure;

[0041] Specifically, such as Figure 2 As shown, welding pads 31 are respectively provided on the cover plate 30 at positions corresponding to the reinforcement columns 20 , and the reinforcement columns 20 and the welding pads 31 are fixed by laser welding.

[0042] For the thin sheet cover structure (generally with a thickness of a few tenths of a millimeter), by adding fixing columns 20 in the square shell 10, it is equivalent to reinforcing the entire battery cell in sections. Compared with the original cover plate using an edge-fixed connection method, the section-by-section reinforcement method of this embodiment significantly enhances the deformation resistance of each part of the square steel shell structure, thereby improving the problem of easy deformation of the square steel shell structure and increasing the service life of the square steel shell battery cell.

[0043] In this embodiment, a plurality of reinforcing columns 20 are evenly distributed in the battery cell mounting groove 11;

[0044] Furthermore, as an optional embodiment, a plurality of reinforcing columns 20 are distributed in an array in the battery cell mounting slot 11; the specific implementation is as follows:

[0045] In the length direction of the square shell 10 , the distance between two adjacent reinforcing columns 20 is 15 mm; in the width direction of the square shell 10 , the distance between two adjacent reinforcing columns 20 is 5 mm.

[0046] Specifically, in this embodiment, the reinforcement column 20 is designed to be cylindrical, and the diameter of the reinforcement column 20 is the same as the diameter of the electrode of the battery cell.

[0047] Specifically, the edge of the cover plate 30 is sealed to the edge of the battery cell mounting groove 11; illustratively, for example, sealant is applied to the edge of the cover plate 30 and the edge of the battery cell mounting groove 11, or a sealing ring or other sealing member is filled in the gap between the edge of the cover plate 30 and the edge of the battery cell mounting groove 11 for sealing.

[0048] In summary, the square steel shell structure provided in this embodiment solves the deformation problem of the square steel shell battery cell during molding and use, and improves the service life of the square steel shell battery cell.

[0049] Example 2:

[0050] This embodiment provides a battery, including a hollow shell and a battery cell installed in the shell. The shell adopts a square steel shell structure as described in the first embodiment.

[0051] Since the square steel shell structure has been described in detail in the first embodiment, it will not be described again in this embodiment.

[0052] Specifically, avoidance holes are provided at positions corresponding to the respective reinforcement columns 20 on the battery cell;

[0053] The plurality of reinforcing columns 20 pass through the corresponding avoidance holes respectively to limit the battery cell in the battery cell installation groove 11 , and the cover plate 30 abuts against the side surface of the battery cell away from the groove bottom.

[0054] With this structural design, the battery cells are limited in multiple directions when installed in the square steel shell structure, making the battery cells more securely fixed.

[0055] Specifically, in this embodiment, the battery cell adopts a stacked core structure; the positive and negative tabs of the battery cell are respectively distributed at both ends of the battery cell.

[0056] Specifically, in this embodiment, the battery is a lithium battery.

[0057] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A square steel shell structure, characterized in that: It comprises a square shell (10) provided with a battery cell installation groove (11) and a cover plate (30) for sealing the notch of the battery cell installation groove (11); A plurality of reinforcement columns (20) are fixedly provided at the bottom of the battery cell installation groove (11); one end of the reinforcement column (20) away from the bottom of the battery cell installation groove (11) is fixedly connected to the cover plate (30).

2. A square steel shell structure according to claim 1, characterized in that: The plurality of reinforcement columns (20) are evenly distributed in the battery cell installation groove (11).

3. A square steel shell structure according to claim 2, characterized in that: The plurality of reinforcement columns (20) are distributed in an array in the battery cell installation groove (11); In the length direction of the square shell (10), the spacing between two adjacent reinforcing columns (20) is 15 mm; in the width direction of the square shell (10), the spacing between two adjacent reinforcing columns (20) is 5 mm.

4. The square steel shell structure according to claim 1, characterized in that: The reinforcing column (20) is cylindrical, and the diameter of the reinforcing column (20) is the same as the diameter of the pole of the battery cell.

5. The square steel shell structure according to claim 1, characterized in that: Welding pads (31) are respectively provided on the cover plate (30) at positions corresponding to the respective reinforcing columns (20), and the reinforcing columns (20) and the welding pads (31) are fixed by laser welding.

6. The square steel shell structure according to claim 1, characterized in that: The edge of the cover plate (30) is sealed to the edge of the battery cell installation groove (11).

7. A battery comprising a hollow shell and a battery cell installed in the shell, characterized in that: The shell adopts a square steel shell structure as described in any one of claims 1-6.

8. A battery according to claim 7, characterized in that: The battery core is provided with avoidance holes at positions corresponding to the respective reinforcement columns (20); The plurality of reinforcing columns (20) respectively pass through corresponding avoidance through-holes to limit the battery cell in the battery cell installation groove (11), and the cover plate (30) abuts against a side surface of the battery cell away from the groove bottom.

9. A battery according to claim 7, characterized in that: The battery cell adopts a stacked core structure; the positive and negative tabs of the battery cell are respectively distributed at both ends of the battery cell.

10. A battery according to claim 7, characterized in that: The battery is a lithium battery.

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