A concave cell structure

Abstract

The utility model discloses a concave type electric core structure, include: electric core main part, the positive pole end of electric core main part is provided with recess, the side surface in recess is provided with sealing washer, the bottom in recess is provided with the aluminum plate of connecting positive pole tab, can be used for fixed protection circuit board in recess, protection circuit board with aluminum plate contact connection, the positive pole of above -mentioned protection circuit board middle is provided with, this concave type electric core structure is provided with recess structure, and the installation of protection circuit etc. structure is convenient, and simple structure is convenient for production.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a concave battery cell structure. Background Technology

[0002] Lithium batteries are currently the most advanced chemical power sources, characterized by high specific energy, high voltage, high power, wide operating temperature range, stable discharge performance, long storage life, and maintenance-free operation. At present, the charge and discharge protection of lithium batteries usually adopts protection circuits to protect the battery. In existing technologies, the installation structure of the battery cell on the protection circuit board varies, and some structures are quite complex. There is a lack of a unified and universal installation structure, and there is an urgent need for a simpler and more universal battery cell structure. Utility Model Content

[0003] The purpose of this utility model is to provide a concave battery cell structure, which facilitates the installation of protection circuits and other structures by providing a groove structure. The structure is simple and easy to manufacture.

[0004] To achieve this objective, the present invention adopts the following technical solution: A concave battery cell structure is provided, comprising: a battery cell body, a groove provided at the positive terminal of the battery cell body, a sealing ring provided on the side of the groove, and an aluminum plate for connecting the positive electrode tab provided at the bottom of the groove.

[0005] As a preferred embodiment of the concave cell structure, the side cross-section of the sealing ring is a C-shaped structure with the opening facing the center, and the outer periphery of the aluminum plate is provided with a first retaining edge corresponding to the C-shaped opening. The aluminum plate is engaged with the middle of the sealing ring through the retaining edge.

[0006] As a preferred embodiment of the concave cell structure, the sealing ring is an annular structure, and the upper end of the sealing ring is provided with a C-shaped folded edge with the opening facing the center. The outer periphery of the aluminum plate is provided with an L-shaped second retaining edge. One end of the second retaining edge is vertically connected to the outer periphery of the aluminum plate, and the other end of the second retaining edge is horizontally facing outward and is engaged in the opening of the C-shaped folded edge.

[0007] As a preferred embodiment of the concave cell structure, the bottom of the aluminum plate is connected to the positive electrode tab via a current interruption device.

[0008] The beneficial effects of this utility model are as follows: The concave battery cell structure proposed in this utility model has a groove at the positive end of the battery cell body, and the sealing ring and the aluminum plate connecting the positive electrode tab in the groove allow the protection circuit board to be directly installed and connected in the groove, which facilitates the installation of protection circuits and other structures. The structure is simple and easy to produce. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0010] Figure 1 This is a side view of the concave battery cell structure according to an embodiment of the present invention; Figure 2 This is a side view of the concave battery cell structure and the protective circuit board according to an embodiment of the present invention; Figure 3 This is a side view of the concave battery cell structure according to another embodiment of the present invention; Figure 4 This is a side view of the concave battery cell structure and the protective circuit board according to another embodiment of the present invention; In the picture: 1. Battery cell body; 2. Sealing ring; 3. Aluminum plate; 4. Protective circuit board; 5. Positive electrode; 6. Positive electrode ring; 7. Negative electrode ring; 8. Protective circuit layer; 9. Insulation layer; 10. Current interruption device. Detailed Implementation

[0011] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0012] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0013] Reference Figures 1-4 An embodiment of this utility model provides a concave battery cell structure, including: a battery cell body 1, a groove is provided at the positive end of the battery cell body 1, a sealing ring 2 is provided on the side of the groove, an aluminum plate 3 for connecting the positive electrode tab is provided at the bottom of the groove, a protective circuit board 4 is fixed in the groove, the protective circuit board 4 is in contact with the aluminum plate 3, and a positive electrode 5 is provided at the upper center of the protective circuit board 4.

[0014] In the above technical solution, a groove is provided at the positive end of the battery cell body 1, and the sealing ring 2 and the aluminum plate 3 connecting the positive electrode tab are provided in the groove, so that the protection circuit board can be directly installed and connected in the groove, which facilitates the installation of protection circuit and other structures. The structure is simple and easy to produce.

[0015] Reference Figure 1 and Figure 2 In some embodiments, the side cross-section of the sealing ring 2 is a C-shaped structure with the opening facing the center, and the outer periphery of the aluminum plate 3 is provided with a first retaining edge corresponding to the C-shaped opening. The aluminum plate 3 is engaged with the middle of the sealing ring 2 through the retaining edge.

[0016] Reference Figure 3 and Figure 4 In some embodiments, the sealing ring 2 is an annular structure, and the upper end of the sealing ring 2 is provided with a C-shaped folded edge with the opening facing the center. The outer periphery of the aluminum plate 3 is provided with an L-shaped second retaining edge. One end of the second retaining edge is vertically connected to the outer periphery of the aluminum plate 3, and the other end of the second retaining edge is horizontally facing outward and is engaged in the opening of the C-shaped folded edge.

[0017] In some embodiments, a positive electrode ring 6 is provided on the bottom outer periphery of the protection circuit board 4, and the positive electrode ring 6 is in contact with the aluminum plate 3. The annular design of the positive electrode ring 6 prevents short circuits between the components of the protection circuit layer 8 and the aluminum plate 3. By controlling the inner diameter of the positive electrode ring 6, short circuits with electronic components in the protection circuit layer 8 are prevented. Simultaneously, the positive electrode ring acts as a PTC (Power Transmitter) to stop charging or discharging when the charging or discharging current is too high, preventing problems with battery charging and discharging.

[0018] In some embodiments, a negative electrode ring 7 is provided on the upper outer periphery of the protective circuit board 4. The negative electrode ring 7 is soldered to the output surface of the protective circuit board 4 and is used as the negative electrode of the protective circuit board 4. During sealing, it prevents the sealing edge of the protective circuit board from being damaged or cracked, and reduces the contact resistance.

[0019] In some embodiments, a protective circuit layer 8 is provided at the bottom center of the protective circuit board 4, and an insulating layer 9 is provided at the bottom of the protective circuit layer 8. The insulating layer 9 serves as an insulating protection layer.

[0020] In some embodiments, the bottom of the aluminum plate 3 is connected to the positive electrode tab via a current interruption device 10. The current interruption device 10, or CID, plays a crucial role as a common component in batteries. When the battery encounters a crisis, such as overheating, short circuit, or overcharging, the CID acts as a safety barrier. By monitoring pressure changes, when the pressure exceeds a preset threshold, the CID automatically disconnects the positive electrode lead to prevent electrolyte leakage and ensure battery safety.

[0021] In the description of this utility model, it should be understood that the terms "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first feature, or indirect contact with the first feature through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. A concave battery cell structure, characterized in that, include: The battery cell body (1) has a groove at the positive end of the battery cell body (1), a sealing ring (2) is provided on the side of the groove, and an aluminum plate (3) for connecting the positive electrode tab is provided at the bottom of the groove. The side section of the sealing ring (2) is a C-shaped structure with the opening facing the center. The outer periphery of the aluminum plate (3) is provided with a first retaining edge corresponding to the C-shaped opening. The aluminum plate (3) is engaged with the middle of the sealing ring (2) through the retaining edge.

2. The concave cell structure according to claim 1, characterized in that, The sealing ring (2) is an annular structure, and the upper end of the sealing ring (2) is provided with a C-shaped folded edge with the opening facing the center. The outer periphery of the aluminum plate (3) is provided with an L-shaped second clamping edge. One end of the second clamping edge is vertically connected to the outer periphery of the aluminum plate (3), and the other end of the second clamping edge is horizontally facing outward and clamped into the opening of the C-shaped folding edge.

3. The concave cell structure according to claim 1, characterized in that, The bottom of the aluminum plate (3) is connected to the positive electrode tab via a current interruption device (10).

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