Connecting piece for lithium battery

Abstract

The utility model discloses a connecting piece for a lithium battery, which comprises a plurality of battery connecting pieces, every two adjacent battery connecting pieces are fixedly connected through a circular hoop, the battery connecting pieces are designed to be of an integrally formed structure between the circular hoops, four clamping pieces are arranged on the inner wall of each circular hoop, and the clamping pieces are arranged on the inner wall of each circular hoop. The battery connecting piece comprises four clamping pieces, the four clamping pieces are circumferentially distributed at equal intervals through the midpoint of the circular hoop, the top end of each clamping piece is fixedly connected with a bent elastic piece, and the lower surface of each bent elastic piece is provided with a guide slope surface. Therefore, displacement of the connecting piece due to vibration or bumping can be effectively avoided, damage or short-circuit combustion of the lithium battery is avoided, the use safety of the lithium battery is better improved, the service life of the lithium battery is better prolonged, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a connecting sheet for lithium batteries. Background Art

[0002] Lithium-ion battery: a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charge and discharge process, Li+ is intercalated and deintercalated between the two electrodes: during charging, Li+ is deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; during discharge, the opposite is true;

[0003] Batteries generally use materials containing lithium as electrodes and are the representative of modern high-performance batteries. Products are widely used in electric bicycles, electric motorcycles, electric vehicles, power tools, electric toys, solar photovoltaic power generation systems, wind power generation systems, mobile communication base stations, large server backup UPS power supplies, emergency lighting, portable mobile power supplies and mine safety equipment. Its auxiliary products are mainly used in notebook computers, LED flashlights, mobile phones, mobile DVDs, GPS and other products;

[0004] At present, the main problem of battery connectors is unstable product performance. The battery connectors are easily displaced due to vibrations and bumps, which can easily cause battery damage or short circuit combustion, affecting the service life of lithium batteries and posing certain safety hazards. Utility Model Content

[0005] The purpose of the utility model is to provide a connecting piece for a lithium battery to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connecting piece for a lithium battery, comprising a battery connecting piece, wherein a plurality of the battery connecting pieces are provided, and two adjacent battery connecting pieces are fixedly connected by a circular clamp, and the battery connecting piece has an integrally formed structure design between the circular clamps, and four clamping pieces are provided on the inner wall of each circular clamp, and the four clamping pieces are distributed in a circle with equal intervals through the midpoint of the circular clamp, and a bent spring piece is fixedly connected to the top of each clamping piece, and a guide slope surface is provided on the lower surface of the bent spring piece.

[0007] Preferably, welding bumps are provided at both ends of the upper surface of each of the battery connecting pieces.

[0008] Preferably, an output connecting piece is fixedly connected to the outer wall of the rightmost battery connecting piece, and the output connecting piece and the battery connecting piece are integrally formed.

[0009] Preferably, an outer sheath is fixedly mounted on the upper surface of each circular clamp, and the shape of the outer sheath is one of a straight cylinder or a tapered cylinder.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] When the circular clamp is sleeved on the lithium battery pole, the inner diameter formed by the four bent spring sheets is smaller than the pole diameter of the lithium battery. Therefore, during the sleeve connection of the circular clamp, the lithium battery pole will push against the bent spring sheets, so that the bent spring sheets will bend and deform at a certain angle. After the circular clamp is completely sleeved on the outside of the pole, the bent spring sheets will be bent and deformed at a certain angle. Therefore, the upper surface of the bent spring sheets will overlap and contact with the clamping sheets due to the bending effect. The bent spring sheets can be closely contacted and connected with the gap between the clamping sheets and the lithium battery pole, so that the clamping sheets and the bent spring sheets can be used in coordination to play a role of fixing and clamping. In addition, the lower surface of the bent spring sheets is a guiding slope surface, so it has a certain smoothness when pressed down for sleeve connection, effectively reducing the resistance during the sleeve connection process, and having a better structural use effect.

[0012] In actual use, the battery connecting piece of the utility model can effectively position and clamp the lithium battery pole, and has a certain limiting and fixing effect, thereby effectively avoiding displacement of the connecting piece due to vibration or bumps, avoiding damage to the lithium battery or short-circuit combustion, and better improving the safety and service life of the lithium battery, reducing safety hazards, and at the same time, the beneficial effect of the sleeve positioning and fixing can be reflected during welding. During welding, due to the clamping and fixing effect of the connecting piece, the overall stability of the connecting piece welding process can be effectively improved, and the movement of the connecting piece during the welding process can be avoided, thereby improving the welding accuracy and welding quality, thereby effectively improving the production quality of lithium batteries, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the upper surface of the battery connecting piece according to an embodiment of the utility model;

[0014] Figure 2 This is a bottom bottom structural schematic diagram of a battery connecting piece according to an embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of a circular clamp structure of an embodiment of the utility model;

[0016] Figure 4 For the utility model embodiment Figure 3 A schematic diagram of the enlarged structure of region A;

[0017] Figure 5 It is a schematic diagram of the downslope structure of the bent spring piece according to an embodiment of the utility model.

[0018] In the figure: 1. battery connecting piece; 2. round clamp; 3. outer sheath; 4. welding protrusion; 5. output connecting piece; 6. clamping piece; 7. bent spring piece. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-5 The utility model provides an embodiment: a connecting piece for a lithium battery, including a battery connecting piece 1, wherein a plurality of battery connecting pieces 1 are provided, and two adjacent battery connecting pieces 1 are fixedly connected by a circular clamp 2, and the battery connecting piece 1 has an integrally formed structure design between the circular clamps 2. The battery connecting piece of the utility model can be sleeved on the outside of the pole of the lithium battery by the provided circular clamp 2, so that the normal sleeve positioning work of the lithium battery connecting piece can be completed, which is convenient for subsequent welding;

[0023] Four clamping pieces 6 are arranged on the inner wall of each circular clamp 2. The four clamping pieces 6 are distributed in a circle with equal spacing through the midpoint of the circular clamp 2. A bent spring piece 7 is fixedly connected to the top of each clamping piece 6. A guiding slope surface is arranged on the lower surface of the bent spring piece 7. For details, please refer to the attached manual. Figure 5As shown, the guide ramp surface has a certain displacement guiding smoothness, which can effectively reduce the sleeve resistance;

[0024] In addition, in actual use, the inner diameter formed by the four bent spring pieces 7 is smaller than the diameter of the lithium battery pole using the connecting piece, while the inner diameter formed by the four clamping pieces 6 is slightly larger than the diameter of the lithium battery pole;

[0025] According to the above structural design, when the circular clamp 2 is sleeved on the lithium battery pole, since the inner diameter formed by the four bent spring pieces 7 is smaller than the pole diameter of the lithium battery, the lithium battery pole will push against the bent spring piece 7 during the sleeve connection of the circular clamp 2, so that the bent spring piece 7 undergoes a certain bending deformation. After the circular clamp 2 is completely sleeved on the outside of the pole, the bent spring piece 7 is bent and deformed, so that its upper surface overlaps and contacts with the clamping piece 6 due to the bending effect. The bent spring piece can tightly fill the gap between the clamping piece 6 and the lithium battery pole, thereby playing a role of fixing and clamping.

[0026] In actual use, the battery connecting piece of the utility model can effectively position and clamp the lithium battery pole, and has a certain limiting and fixing effect, thereby effectively avoiding displacement of the connecting piece due to vibration or bumping, avoiding damage to the lithium battery or short circuit combustion, and better improving the safety and service life of the lithium battery, and reducing safety hazards. At the same time, the fixing effect of the sleeve positioning can effectively improve the stability of the connecting piece welding process, avoid displacement during the welding process, improve the welding quality, and thus effectively improve the production quality of the lithium battery.

[0027] In this embodiment, welding bumps 4 are provided at both ends of the upper surface of each battery connecting piece 1 , and the connecting piece can be welded through the provided welding bumps 4 .

[0028] In this embodiment, an output connecting piece 5 is fixedly connected to the outer wall of the rightmost battery connecting piece 1. The output connecting piece 5 is used to connect to an external power transmission line to ensure the normal output operation of the lithium battery. The output connecting piece 5 and the battery connecting piece 1 are integrally formed.

[0029] In this embodiment, an outer sheath 3 is fixedly mounted on the upper surface of each circular clamp 2, and the outer sheath 3 can provide external protection for the lithium battery pole;

[0030] The shape of the outer sheath 3 is a straight cylinder or a conical cylinder, and the specific shape is selected according to the shape of the lithium battery pole.

[0031] Working principle: When the utility model is actually used, the battery connecting piece 1 needs to be used with the lithium battery of the utility model. The adaptation condition is that the inner diameter formed by the four bent spring pieces 7 is smaller than the diameter of the lithium battery pole using the connecting piece, and the inner diameter formed by the four clamping pieces 6 is larger than the diameter of the lithium battery pole. The spacing between the poles is adapted to the spacing of the circular clamping hoops 2, so that a plurality of circular clamping hoops 2 can be smoothly sleeved on each lithium battery pole;

[0032] In the specific use process, the circular clamp 2 is set on the pole of the lithium battery, and then the connecting metal sheets of the utility model are welded one by one on the positive electrode of the battery by using a spot welding machine to align the positions of several welding protrusions 4 to ensure the normal use effect, and the output connecting sheet 5 is provided to connect the external power transmission line to ensure the normal output operation and use of the lithium battery;

[0033] In addition, when the circular clamp 2 is sleeved on the lithium battery pole, since the inner diameter formed by the four bent spring pieces 7 is smaller than the pole diameter of the lithium battery, the lithium battery pole will push the bent spring pieces 7 during the sleeve connection of the circular clamp 2, so that the bent spring pieces 7 are bent and deformed at a certain angle. After the circular clamp 2 is completely sleeved on the outside of the pole, the bent spring pieces 7 are bent and deformed so that their upper surfaces overlap and contact with the clamping pieces 6 due to the bending effect. The bent spring pieces can be closely contacted and connected with the gap between the clamping pieces 6 and the lithium battery pole, so that the clamping pieces 6 and the bent spring pieces 7 are used in coordination to play a role of fixing and clamping. In addition, the lower surface of the bent spring piece 7 is a guiding slope surface, so it has a certain smoothness when pressed down for sleeve connection, effectively reducing the resistance during the sleeve connection process, and having a better structural use effect.

[0034] In actual use, the battery connecting piece of the utility model can effectively position and clamp the lithium battery pole, and has a certain limiting and fixing effect, thereby effectively avoiding displacement of the connecting piece due to vibration or bumps, avoiding damage to the lithium battery or short-circuit combustion, and better improving the safety and service life of the lithium battery, reducing safety hazards, and at the same time, the beneficial effect of the sleeve positioning and fixing can be reflected during welding. During welding, due to the clamping and fixing effect of the connecting piece, the overall stability of the connecting piece welding process can be effectively improved, and the movement of the connecting piece during the welding process can be avoided, thereby improving the welding accuracy and welding quality, thereby effectively improving the production quality of lithium batteries, and having good practicality.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A connecting piece for a lithium battery, comprising a battery connecting piece (1), characterized in that: A plurality of battery connecting pieces (1) are provided, and two adjacent battery connecting pieces (1) are fixedly connected via a circular clamp (2). The battery connecting pieces (1) have an integrally formed structural design between the circular clamps (2), and four clamping pieces (6) are provided on the inner wall of each circular clamp (2). The four clamping pieces (6) are distributed in a circle at equal intervals through the midpoint of the circular clamp (2). A bent spring piece (7) is fixedly connected to the top of each clamping piece (6), and a guiding slope surface is provided on the lower surface of the bent spring piece (7).

2. A connecting sheet for a lithium battery according to claim 1, characterized in that: Welding bumps (4) are provided at both ends of the upper surface of each battery connecting piece (1).

3. A connecting sheet for a lithium battery according to claim 1, characterized in that: An output connection piece (5) is fixedly connected to the outer wall of the battery connection piece (1) on the far right, and the output connection piece (5) and the battery connection piece (1) are designed to be integrally formed.

4. A connecting sheet for a lithium battery according to claim 1, characterized in that: An outer sheath (3) is fixedly mounted on the upper surface of each circular clamp (2), and the outer sheath (3) is in the shape of a straight cylinder or a conical cylinder.

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