Strengthening safety structure adapter sheet

Abstract

The utility model discloses an adapter sheet with a reinforced insurance structure. The adapter sheet comprises a pole connecting part; the tab connecting part is fixedly connected with the pole connecting part, an opening is formed in the center line of the tab connecting part, the bottom of the opening is close to the pole connecting part, and the other end of the opening extends to the side far away from the pole connecting part. According to the utility model, the problem of secondary conduction caused by easy re-touch after the switching sheet is fused when the safety of the battery cell fails due to short circuit, overcharge and the like is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and specifically relates to a reinforcing fuse structure adapter plate. Background Art

[0002] With the rapid development of lithium batteries, more and more devices, such as mobile phones, laptops, power tools, and electric vehicles, choose lithium batteries as power sources. A lithium battery generally includes a top cover, a plurality of bare battery cells, and an adapter plate. One end of the adapter plate is connected to the tab of the bare battery cell, and the other end is connected to the terminal on the top cover. The adapter plate serves as a medium for connecting the terminal and the wound core to transmit current and plays a certain role in cooling. However, as the overcurrent increases, the temperature of the adapter plate will increase accordingly, resulting in thermal runaway. As a result, after the terminal is exposed to high temperature, the plastic material is dissolved and damaged, ultimately leading to the failure of the sealing performance. Therefore, the adapter plate needs to meet the requirement of timely disconnecting the circuit when the battery experiences short circuit or other conditions, so as to avoid damage to the battery and other potential hazards caused by short circuit. The adapter plate of the existing fuse structure has holes punched in the middle overcurrent position to reduce the cross-sectional size of the overcurrent. However, when the battery cell safety fails actually and the temperature reaches the melting point, it is not easy to melt, and due to the large contact area, it may cause re-contact and secondary conduction. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a reinforcing fuse structure adapter plate to solve the problem that when the battery cell safety fails such as short circuit or overcharge, re-contact is likely to occur after the adapter plate melts, resulting in secondary conduction.

[0004] The technical solution of the utility model is as follows: The utility model provides a reinforcing fuse structure adapter plate, including:

[0005] A terminal connection part;

[0006] A tab connection part, the tab connection part is fixedly connected to the terminal connection part, an opening is provided on the center line of the tab connection part, the bottom of the opening is close to the terminal connection part, and the other end extends to the side far from the terminal connection part.

[0007] Further, the opening includes a bottom edge, a first side edge, and a second side edge. The first side edge and the second side edge are symmetrically arranged on both sides of the center line of the tab connection part, and the length of the bottom edge does not exceed one-third of the length of the terminal connection part in the horizontal direction.

[0008] Further, the included angle between the extension lines of the first side edge and the second side edge of the opening is an acute angle.

[0009] Further, the bottom edge of the opening is parallel to the side of the terminal connection part far from the tab connection part.

[0010] Further, both the tab connection part and the terminal connection part are arranged on the same horizontal plane.

[0011] Further, the terminal connection part and the tab connection part are arranged in parallel.

[0012] Further, the midlines of the terminal connection part and the tab connection part coincide.

[0013] Further, both the terminal connection part and the tab connection part are symmetrically arranged.

[0014] Further, the area of the terminal connection part is smaller than the area of the tab connection part.

[0015] Further, both the tab connection part and the terminal connection part are made of aluminum or copper.

[0016] The beneficial effects of the present utility model are as follows: A reinforced fuse structure adapter provided by the present utility model includes a tab connection part and a terminal connection part. An opening is provided on the midline of the tab connection part, weakening the cross-sectional area at the connection between the tab and the terminal. When the battery current is too large, it can be timely melted to protect the battery cell; the bottom of the opening is arranged at one end close to the terminal connection part, and the opening direction extends to the end far from the terminal connection part, reducing the cross-sectional area of the melted part while not affecting the tab welding and the current passing between the tab and the terminal, reducing the probability of re-contact after melting, and improving the safety of the battery cell. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a front view structural schematic diagram of a reinforced fuse structure adapter provided by an embodiment of the present application;

[0019] Figure 2 It is a front view structural schematic diagram of an adapter in the prior art;

[0020] Explanation of the reference numerals in the drawings:

[0021] 1 - Terminal connection part, 2 - Tab connection part, 21 - Opening, 211 - Bottom edge, 212 - First side, 213 - Second side. Detailed Embodiments

[0022] To make the above objects, features, and advantages of the present application more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present application in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0023] As shown in the present application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0024] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meaning, so they cannot be understood as a limitation on the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment. The detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0025] The following provides a detailed description of the implementation of the present utility model in conjunction with specific drawings:

[0026] Figure 1 It is a front view structural schematic diagram of a reinforcing insurance structure adapter provided for an embodiment of the present application. As Figure 1 shown, the present utility model discloses a reinforcing insurance structure adapter. The adapter includes a pole connection part 1 and an ear connection part 2. The pole connection part 1 is connected to the pole on the battery top cover, and the ear connection part 2 is connected to the ear on the battery cell. The pole connection part 1 and the ear connection part 2 are fixedly connected and integrally formed. In this embodiment, the contours of the two form a convex shape. The midlines of the pole connection part 1 and the ear connection part 2 are on the same straight line, and both the pole connection part 1 and the ear connection part 2 are symmetrically arranged along the midline. The area of the ear connection part 2 is larger than the area of the pole connection part 1. The current output by the battery cell is aggregated and output to the pole on the top cover through the adapter. This symmetrical arrangement enables the current passing through the adapter to be stably output and prevents excessive local current.

[0027] The tab connection part 2 and the terminal connection part 1 are both arranged on the same plane, and both the terminal connection part 1 and the tab connection part 2 are made of metal copper or aluminum by rolling. Their thicknesses are the same. The adapter plate is more convenient and easy to operate during the manufacturing process, and only needs to use a tool to cut an opening on the adapter plate.

[0028] An opening 21 is provided on the tab connection part 2. The opening 21 includes a bottom side 211, a first side 212 and a second side 213. The bottom side 221 of the opening 21 is arranged between the tab connection part 2 and the terminal connection part 1, and the opening 21 is symmetrically arranged along the midline of the tab connection part 2. The bottom side 221 is close to the end where the terminal connection part 1 is connected to the tab connection part, and the opening extends to the end of the tab connection part 2 away from the terminal connection part 1. Compared with Figure 2 In the prior art, only an opening shape is provided between the terminal connection part 1 and the tab connection part 2. The opening shape in the prior art is a long and narrow slit arranged between the tab connection part 2 and the terminal connection part 1. The cross-sectional area of this structure is relatively large, and secondary contact is likely to occur after fusing, resulting in continuous current output of the battery cell and posing a safety hazard. Therefore, the adapter plate provided in this embodiment has a smaller cross-sectional area at the connection between the tab connection part 2 and the terminal connection part 1, reducing the probability of re-contact after fusing and improving the safety of the battery cell. This part is the insurance structure of the adapter plate. When the current passing through the adapter plate is too large, the temperature of the adapter plate rises, and the connection part between the terminal connection part 1 and the tab connection part 2 is fused, and the battery stops outputting current, improving the safety of the battery.

[0029] In the embodiment of the present application, the length of the bottom side 211 of the opening 21 does not exceed one-third of the length of the terminal connection part 1 in the horizontal direction. The length of the bottom side 211 can be adjusted according to the maximum output current range of the battery. When the maximum output current increases, the length of the bottom side 211 decreases, and the fusing part is more difficult to fuse. When the maximum output current decreases, the length of the bottom side 211 increases, making the fusing part easier to fuse, which can meet the requirement of timely disconnecting the circuit when the battery has a short circuit or other situations, thereby avoiding damage to the battery and other possible hazards caused by the short circuit.

[0030] In the embodiment of the present application, the included angle between the extension lines of the first side 212 and the second side 213 is an acute angle, and the shape of the opening is a trapezoid. The first side 212 and the second side 213 of the opening can also be parallel, making the shape of the opening 21 a rectangle. This structure can meet normal tab welding and overcurrent, enabling the battery to work normally.

[0031] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only for example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0032] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0033] In some embodiments, numbers are used to describe the components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are, in some examples, modified by the modifiers "about", "approximately", or "substantially". Unless otherwise stated, "about", "approximately", or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used to confirm the breadth of the scope in some embodiments of this application are approximate values, in specific embodiments, the setting of such numerical values is as precise as possible within the feasible range.

Claims

1. A reinforced safety structure adapter, characterized in that: include: Pole connection part; A pole lug connection portion, the pole lug connection portion is fixedly connected to the pole column connection portion, an opening is provided on the midline of the pole lug connection portion, the bottom of the opening is close to the pole column connection portion, and the other end extends to a side away from the pole column connection portion.

2. A reinforced safety structure adapter according to claim 1, characterized in that: The opening comprises a bottom edge, a first side edge and a second side edge, wherein the first side edge and the second side edge are symmetrically arranged on both sides of the center line of the pole lug connection portion, and the length of the bottom edge does not exceed one third of the length of the pole connection portion in the horizontal direction.

3. A reinforced safety structure adapter as claimed in claim 2, characterized in that: An included angle between an extension line of the first side and the second side of the opening is an acute angle.

4. A reinforced safety structure adapter as claimed in claim 3, characterized in that: The bottom side of the opening is parallel to a side of the pole connecting portion away from the pole lug connecting portion.

5. The reinforced safety structure adapter according to claim 1, characterized in that: The pole lug connection portion and the pole column connection portion are both arranged on the same horizontal plane.

6. A reinforced safety structure adapter as claimed in claim 5, characterized in that: The pole connecting portion and the pole lug connecting portion are arranged in parallel.

7. A reinforced safety structure adapter as claimed in claim 6, characterized in that: The center line of the pole connection portion coincides with the center line of the pole lug connection portion.

8. A reinforced safety structure adapter as claimed in claim 7, characterized in that: The pole connecting portion and the pole lug connecting portion are both symmetrically arranged.

9. A reinforced safety structure adapter as claimed in claim 8, characterized in that: The area of ​​the pole connection portion is smaller than the area of ​​the tab connection portion.

10. The reinforced safety structure adapter according to claim 1, characterized in that: The pole lug connection part and the pole column connection part are both made of aluminum or copper.

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