Connecting piece and lithium ion battery

Abstract

The utility model discloses a connecting piece and a lithium ion battery, and relates to the technical field of batteries. The connecting piece comprises a connecting main body and a connecting piece, the connecting parts are oppositely arranged on the two sides of the connecting main body, and at least parts of the connecting parts are connected with the connecting main body; and the sectional type fusing structure is arranged between the connecting main body and the connecting part and is positioned on a current path. The utility model solves the problems that the current-carrying area of an over-current area is reduced in the conventional Fuse design, and if the current-carrying area of the Fuse area is small, the Fuse area is seriously heated during conventional use, so that the thermal management of a battery cell is influenced; and if the current-carrying area of the Fuse region is designed to be too large, the fusing time of the Fuse region is long, and the safety requirement cannot be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a connecting piece and lithium ion battery. BACKGROUND

[0002] The traditional connecting piece depends on high-conductivity metal (such as copper, aluminum), and its melting point is high (copper 1083°C, aluminum 660°C). When the battery overflows or short-circuits, heat accumulates slowly, and it cannot be fused in time before thermal runaway (usually several seconds to tens of seconds), resulting in a sharp rise in the internal temperature of the battery, causing fire or explosion.

[0003] To solve the above problems, the current common method is to open a hole (called Fuse) on the connecting piece, reducing the overcurrent capacity of the opening area. When current overflows or short-circuits occur, the opening area heats up faster than the conventional area, which helps to melt in time before thermal runaway.

[0004] The existing Fuse design reduces the current-carrying area of the overcurrent area. If the current-carrying area of the Fuse area is designed to be small, the Fuse area will heat up severely during normal use, affecting the thermal management of the battery cell. If the current-carrying area of the Fuse area is designed to be too large, the Fuse area will take a long time to melt, which cannot meet the safety needs. In view of the above problems, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a connecting piece and lithium ion battery to at least solve one of the problems existing in the prior art.

[0006] Technical scheme: a connecting piece, comprising:

[0007] A connecting body;

[0008] A connecting part is oppositely arranged on both sides of the connecting body and at least partially connected with the connecting body; and

[0009] A segmented fuse structure is arranged between the connecting body and the connecting part and located on the current path;

[0010] Among them, the segmented fuse structure is at least opened at the junction of the connecting body and the connecting part, and multiple accurate controllable fuse protections are formed.

[0011] As a preferred, the connecting body is at least partially protruding from the connecting part.

[0012] As a preferred, the connecting body and the connecting part enclose a semi-open connecting cavity.

[0013] As a preferred, the segmented fuse structure is a geometrically weakened structure.

[0014] As preferred, the geometric weakening structure is a comb-tooth structure.

[0015] As preferred, the segmented fuse structure comprises a plurality of rectangular openings, the plurality of rectangular openings are arranged in an interval array on one side of the connecting body adjacent to the connecting portion, and the rectangular openings arranged in an array are arranged parallel to the connecting portion.

[0016] As preferred, the segmented fuse structure comprises a plurality of rectangular openings, the plurality of rectangular openings are arranged in an interval array on one side of the connecting body adjacent to the connecting portion, and the rectangular openings arranged in an array are arranged parallel to the connecting portion.

[0017] As preferred, the segmented fuse structure comprises a plurality of rectangular openings, the plurality of rectangular openings are arranged in an interval array on one side of the connecting body adjacent to the connecting portion, and the rectangular openings arranged in an array are arranged parallel to the connecting portion.

[0018] As preferred, the rectangular openings are rectangular or square.

[0019] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a lithium ion battery is also provided.

[0020] According to the lithium ion battery of the present application, the connecting sheet is included.

[0021] Beneficial effects: in the embodiment of the present application, the segmented fuse structure is added, and the segmented fuse structure is arranged at the junction of the connecting body and the connecting portion, so as to realize multiple precise and controllable fuse protection, achieve the purpose of multi-step fuse, realize the technical effects of precise control and rapid shrinkage fuse, and further solve the technical problems that the existing Fuse is designed to reduce the current-carrying area of the overcurrent area, if the current-carrying area of the Fuse area is designed to be small, the Fuse area will generate a lot of heat during normal use, which will affect the thermal management of the battery cell; if the current-carrying area of the Fuse area is designed to be too large, the Fuse area will take a long time to melt, which cannot meet the safety needs. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a three-dimensional schematic view of the connecting sheet of the present application;

[0023] Figure 2 is a three-dimensional schematic view of the connecting sheet of the present application;

[0024] Figure 3 is a three-dimensional schematic view of the connecting sheet of the present application; and

[0025] Figure 4 is a three-dimensional schematic view of the connecting sheet of the present application.

[0026] Reference signs are:

[0027] 10, connecting body;

[0028] 20, connecting part;

[0029] 30, sectional fuse structure;

[0030] 40, connecting cavity. DETAILED DESCRIPTION

[0031] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] In addition, the terms "mount", "set", "provided with", "connected", "linked", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] As shown in Figures 1-4 The present application relates to a connecting sheet and a lithium ion battery. As shown in Figures 1-2As shown, the connecting piece includes: a connecting body 10; the connecting body 10 refers to the main load-bearing structure of the device, responsible for providing a current conduction path. It can be made of conductive materials such as copper, aluminum, etc., and has good mechanical strength and electrical conductivity, and can withstand normal working load without structural damage. The structure design needs to ensure stable connection and will not cause poor contact or electrical failure problems due to long-term use.

[0036] The connecting part 20 is arranged opposite to the connecting body 10 on both sides, and at least partially connected to the connecting body 10; it can achieve good connection effect, so as to ensure good electrical conduction effect between parts.

[0037] The segmented fuse structure 30 is arranged between the connecting body 10 and the connecting part 20 and located on the current path; it can ensure good fusing effect, thereby improving the safety factor.

[0038] Among them, the segmented fuse structure 30 is at least opened at the junction of the connecting body 10 and the connecting part 20, to realize multiple precise and controllable fusing protection.

[0039] By arranging the fuse structure at the junction of the connecting body 10 and the connecting part 20, it is ensured that when the current is abnormal, the fuse structure can cut off the fault current path in priority, reducing the risk of affecting other parts; thereby providing segmented control of electrical protection, avoiding the paralysis of the whole system, and in some cases, realizing local fusing, thereby reducing the difficulty of maintenance.

[0040] The present application provides a safe fusing lithium ion battery connecting piece, which designs the fuse area as a fence shape, divides the original one-step fusing into multi-step fusing, and realizes multiple precise and controllable protection. When overcurrent or short circuit occurs, since the cross-sectional area of each fence is smaller, when the metal reaches the melting temperature, the metal can quickly contract and fuse vertically to the fuse area. Compared with the conventional design, it is safer, avoids the problems of fusing delay or structural failure in the traditional scheme, and is used to solve the fusing protection problem when the battery overflows or short circuits.

[0041] From the above description, it can be seen that the present application achieves the following technical effects:

[0042] In the embodiment of the present application, the segmented fuse structure 30 is added, and the segmented fuse structure 30 is arranged at least at the junction of the connecting body 10 and the connecting part 20, so as to achieve multi-step fusing through multiple precise controllable fusing protection, thereby achieving the technical effects of precise control and rapid shrinking fusing, and further solving the technical problems that the existing Fuse is designed to reduce the current-carrying area of the overcurrent region, if the current-carrying area of the Fuse region is designed to be small, the Fuse region will heat seriously in normal use, which affects the thermal management of the battery cell; if the current-carrying area of the Fuse region is designed to be too large, the Fuse region will take a long time to fuse, which cannot meet the safety needs.

[0043] Further, the connecting body 10 is at least partially protruded from the connecting part 20. It can be understood that the good assembly effect can be ensured, and the combination stability between the connecting body 10 and the connecting part 20 can be enhanced, so that the connecting piece is more firm, thereby reducing the current fluctuation or contact failure caused by poor contact.

[0044] Further, the connecting body 10 and the connecting part 20 enclose to form a semi-open connecting cavity 40. It can be understood that the effect of stable installation between components can be achieved; at the same time, it can also help to more effectively dissipate heat when the current passes through, avoiding local overheating.

[0045] Further, the segmented fuse structure 30 is a geometric weakening structure. It can be understood that the geometric weakening structure can be more easily fused when the current load is abnormal through the precise control of the shape.

[0046] Further, the geometric weakening structure is a comb-shaped structure. It can be understood that when a short circuit occurs, each tooth on the comb-shaped connecting structure heats up independently, which helps the Fuse to fuse quickly due to the small independent area.

[0047] As shown in Figure 2 The segmented fuse structure 30 includes: a plurality of rectangular openings, a plurality of the rectangular openings are arranged in at least one row of spaced arrays on one side of the connecting body 10 adjacent to the connecting part 20, and the rectangular openings arranged in rows are arranged parallel to the connecting part 20. It can be understood that this structure makes the open circuit points of the fusing structure uniformly distributed, thereby ensuring the balance and stability of fusing; by uniformly arranging the rectangular openings, the weakened part of the current path can be effectively controlled, so that the response of fusing is more precise and uniform. Preferably, the rectangular opening is in a square shape.

[0048] As shown in Figure 3As shown, the segmented fusible structure 30 includes several rectangular openings, which are evenly spaced and arrayed between the connecting body 10 and the connecting portion 20, and are parallel to the connecting portion 20. This allows for precise controllability while also enabling rapid contraction and fusion. Preferably, the rectangular openings are rectangular in shape.

[0049] like Figure 4 As shown, the segmented fuse structure 30 includes several rectangular openings, which are symmetrically arranged in two rows at the junction of the connecting body 10 and the connecting portion 20, and the rectangular openings are perpendicular to the connecting portion 20. It can be understood that this structure not only ensures the uniformity of the fuse connection but also enhances the reliability and anti-interference capability of the fuse structure; the two rows of symmetrical rectangular openings make the current path more stable, avoiding failures caused by unilateral fuse connection or asymmetrical structures.

[0050] Of course, the aspect ratio of the rectangular opening can be adjusted as needed to achieve a specific fusing effect.

[0051] Furthermore, the rectangular opening can be a rectangle or a square. It is understood that this allows for a variety of shapes to be chosen, thus adapting to the needs of various usage scenarios.

[0052] This application also relates to a lithium-ion battery, including the aforementioned connecting piece; and including but not limited to: a connecting housing and a battery cell; the connecting housing includes a connecting lower housing and a connecting cover plate, the battery cell has tabs, the tabs include a positive tab and a negative tab, and the connecting piece connects the tabs to the connecting cover plate by welding.

[0053] This application also has the following beneficial effects:

[0054] 1. Improve current control accuracy: By setting a segmented fuse structure 30 between the connecting body 10 and the connecting part 20, the current protection is more accurate; the multi-segment fuse structure can provide accurate protection under different current conditions, avoid unnecessary damage to the circuit and equipment caused by overload current, and thus extend the service life of the equipment.

[0055] 2. Optimized design flexibility: The segmented fuse design gives the current protection system good flexibility and adaptability; different types and numbers of fuse structures can be selected according to different current requirements and working environments to provide customized protection solutions and adapt to a variety of application scenarios.

[0056] 3. Enhanced Equipment Stability: Due to the precise control function of the fuse point, the fuse can respond quickly when the current reaches or exceeds the set safety threshold, protecting the equipment from overcurrent damage. This stable protection performance makes the equipment more reliable when operating under high loads, avoiding malfunctions and damage to electrical equipment due to abnormal current.

[0057] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A tab, characterized in that The utility model relates to a connection piece, comprising: a connection body (10); a connection part (20) oppositely arranged on both sides of the connection body (10) and at least partially connected with the connection body (10); and a segmented fuse structure (30) arranged between the connection body (10) and the connection part (20) and located on a current path; wherein the segmented fuse structure (30) is at least opened at the junction of the connection body (10) and the connection part (20) to provide multiple precise and controllable fuse protections.

2. The tab according to claim 1, characterized in that The connection body (10) at least partially protrudes from the connection part (20).

3. The tab of claim 1, wherein The connection body (10) and the connection part (20) enclose a semi-open connection cavity (40).

4. The tab of claim 1, wherein The segmented fuse structure (30) is a geometrically weakened structure.

5. The tab of claim 4, wherein, The geometrically weakened structure is a comb-shaped structure.

6. The tab of claim 1, wherein The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are arranged in an interval array on one side of the connection body (10) adjacent to the connection part (20) in at least one row, and the rectangular openings arranged in rows are arranged in parallel with the connection part (20).

7. The tab of claim 1, wherein The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are arranged in an interval uniform array between the connection body (10) and the connection part (20), and the rectangular openings are arranged in parallel with the connection part (20).

8. The tab of claim 1, wherein The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are symmetrically arranged in two rows at the junction of the connection body (10) and the connection part (20) respectively, and the rectangular openings are arranged perpendicularly to the connection part (20).

9. The tab according to claim 6 or 7 or 8, characterized in that The rectangular openings are rectangular or square.

10. A lithium-ion battery, characterized by, The utility model relates to a connection piece, comprising: a connection body (10); a connection part (20) oppositely arranged on both sides of the connection body (10) and at least partially connected with the connection body (10); and a segmented fuse structure (30) arranged between the connection body (10) and the connection part (20) and located on a current path; wherein the segmented fuse structure (30) is at least opened at the junction of the connection body (10) and the connection part (20) to provide multiple precise and controllable fuse protections. The connection body (10) at least partially protrudes from the connection part (20). The connection body (10) and the connection part (20) enclose a semi-open connection cavity (40). The segmented fuse structure (30) is a geometrically weakened structure. The geometrically weakened structure is a comb-shaped structure. The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are arranged in an interval array on one side of the connection body (10) adjacent to the connection part (20) in at least one row, and the rectangular openings arranged in rows are arranged in parallel with the connection part (20). The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are arranged in an interval uniform array between the connection body (10) and the connection part (20), and the rectangular openings are arranged in parallel with the connection part (20). The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are symmetrically arranged in two rows at the junction of the connection body (10) and the connection part (20) respectively, and the rectangular openings are arranged perpendicularly to the connection part (20). The rectangular openings are rectangular or square. The utility model relates to a connection piece, comprising: a connection body (10); a connection part (20) oppositely arranged on both sides of the connection body (10) and at least partially connected with the connection body (10); and a segmented fuse structure (30) arranged between the connection body (10) and the connection part (20) and located on a current path; wherein the segmented fuse structure (30) is at least opened at the junction of the connection body (10) and the connection part (20) to provide multiple precise and controllable fuse protections. The connection body (10) at least partially protrudes from the connection part (20). The connection body (10) and the connection part (20) enclose a semi-open connection cavity (40). The segmented fuse structure (30) is a geometrically weakened structure. The geometrically weakened structure is a comb-shaped structure. The segmented fuse structure (30) comprises a plurality of rectangular openings, and the plurality of rectangular openings are arranged in an interval array on one side of the connection body (10) adjacent to the connection part (20) in at least one row, and the rectangular openings arranged in rows are arranged in parallel with the connection part (20). The segmented

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