Battery cell connecting piece structure

Abstract

According to the technical scheme, the battery cell connecting piece structure is characterized in that the battery cell connecting piece structure comprises connecting piece bodies and connecting columns, the adjacent connecting columns are connected through the connecting piece bodies, each connecting column comprises a connecting terminal and a bottom plate, the extending outer diameter of the lower end of each connecting terminal is continuously decreased, the connecting terminals are vertically connected with the bottom plates, and the bottom plates are vertically connected with the connecting pieces. An included angle is formed between the side surface of the connecting terminal and the upper end face of the bottom plate, the bottom plate makes contact with a battery positive electrode or a battery negative electrode, a side connecting opening with the inner diameter gradually decreasing is formed in the side surface of the connecting piece body, and the connecting column is matched with the position, with the minimum inner diameter, of the side connecting opening. According to the utility model, through the arrangement of the side connecting port, the connecting sheet main body can be conveniently contacted with the connecting column from the side surface to form matching, and the side connecting port with the variable inner diameter enables the connecting contact to enter the side connecting port to have a larger entering space, so that the connection between the connecting column and the connecting sheet main body is easier and simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field more specifically, it relates to a kind of electric core connecting piece structure. BACKGROUND

[0002] At present, power battery is assembled by a plurality of single cell through cell connecting piece series and parallel connection, and the pole of the two cells is connected by screw using connecting piece between battery, and is reinforced by laser welding on the basis of screw fastening.

[0003] But there are still some defects in the above prior art, in order to ensure product quality, part of the battery needs to be sampled and tested in the production process. This requires the sampled battery to be removed from the production line or the assembled battery module, and then installed back to the original position or processed after testing. For some power batteries that have certain use value although the capacity has decreased, after detection, reorganization and other operations, they can be used in echelon, and then installed in other devices with relatively low requirements for battery performance. In general, the irreversible connection method of laser welding is used, and the subsequent work of disassembling the welding block and loosening the screw is relatively complicated, low in efficiency, easy to damage the cell, and has obvious disassembly marks, which is not convenient for subsequent recycling. The cell pole piece and connecting piece are subject to thermal expansion, and the straight plate structure of the connecting piece can cause the offset and loosening of the welding point between the connecting piece and the cell due to thermal expansion and contraction, which has obvious reliability risks. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model provides a kind of electric core connecting piece structure.

[0005] To achieve the above object, the utility model provides the following technical scheme: including connecting piece main body, connecting column, adjacent connecting column is connected with each other by connecting piece main body, the connecting column includes connecting terminal, bottom plate, the connecting terminal lower end extends outer diameter that does not decrease, the connecting terminal vertically connects bottom plate, there is included angle between the side surface of connecting terminal and the upper end surface of bottom plate, the bottom plate contacts battery positive or battery negative, the side surface of connecting piece main body is provided with the side connecting port of inner diameter that does not decrease, and the connecting column is adapted to the smallest place of side connecting port inner diameter.

[0006] The utility model is further provided as follows: the number of side connecting port is two, and is arranged at the both ends of connecting piece main body respectively, the opening direction of side connecting port at the both ends of connecting piece main body is opposite, and the connecting column connected by side connecting port contacts battery positive and battery negative respectively.

[0007] The utility model further sets up: side connecting mouth is provided with slope, the slope is adapted to connecting terminal side surface, the slope slope is greater than the slope of connecting column side surface and bottom plate angle.

[0008] The utility model further sets up: the connecting piece main part is provided with convex portion in the middle.

[0009] The utility model further sets up: the convex portion is provided with polygonal opening, the polygon is hexagon.

[0010] The utility model further sets up: the connecting piece main part is aluminum connecting piece or copper connecting piece, the connecting piece main part surface is plated with nickel plating layer.

[0011] In conclusion, the utility model has the following beneficial effects: the setting of side connecting mouth makes the connecting piece main part conveniently contact connecting column from side and form cooperation, the side connecting mouth of internal diameter change makes connecting contact enter side connecting mouth and have greater entering space, makes the connection of connecting column and connecting piece body more relaxed and simple, and the opposite setting of side connecting mouth makes the connecting piece main part can be installed through simple rotation mode. The setting of convex portion makes the connecting piece main part can have certain deformation, makes the meeting of the appearance expansion between electric core and the vibration, and the convex portion will produce deformation to offset the appearance expansion between electric core and the vibration, reduces the deviation and loosening of connecting piece main part and electric core. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the structural schematic diagram of this embodiment;

[0013] Fig. 2 It is the connecting piece main part structural schematic diagram of this embodiment;

[0014] Fig. 3 It is the section view of this embodiment A;

[0015] Fig. 1, connecting piece main part;11, side connecting mouth;111, slope;12, convex portion;121, polygonal opening;2, connecting column;21, connecting terminal;22, bottom plate. DETAILED DESCRIPTION

[0016] The utility model will be further explained in detail in connection with the drawings.

[0017] This embodiment discloses a kind of electric core connecting piece structures, as Figs. 1 to 3As shown, including the connecting piece body 1, connecting column 2, adjacent connecting column 2 through the connecting piece body 1 is connected with each other, the connecting column 2 includes connecting terminal 21, bottom plate 22, the lower end of the connecting terminal 21 extends the outer diameter that does not decrease, the connecting terminal 21 is connected with the bottom plate 22 vertically, the side surface of the connecting terminal 21 and the upper end surface of the bottom plate 22 exist angle, the bottom plate 22 contacts battery positive or battery negative, the side surface of the connecting piece body 1 is provided with the side connecting port 11 of the inner diameter that is not constantly small, the side surface is provided with the side connecting port 11, so that the installation connecting piece body 1 can be installed by the side surface with the connecting column 2, more simple than the conventional installation mode from top to bottom, the connecting column 2 is adapted to the minimum place of the inner diameter of the side connecting port 11.The varying inner diameter of the side connecting port 11 makes it easier to install the connecting piece body 1, making it very simple and convenient to install the connecting piece body 1.

[0018] Further improvement, the number of the side connecting port 11 is two, which is respectively arranged at both ends of the connecting piece body 1, the opening direction of the side connecting port 11 at both ends of the connecting piece body 1 is opposite, the connecting column 2 connected by the side connecting port 11 respectively contacts the battery positive and the battery negative. The opposite side connecting port 11 setting makes it possible to use the rotating installation method when installing, which is more labor-saving than the same side opening installation.

[0019] Further improvement, the side connecting port 11 is provided with an inclined surface 111, the inclined surface 111 is adapted to the side surface of the connecting terminal 21, and the slope of the inclined surface 111 is greater than the slope of the angle between the side surface of the connecting terminal 21 and the bottom plate 22. When the connecting piece body 1 is installed, the side connecting port 11 and the connecting column 2 are in interference fit, and a large friction force is generated between the side connecting port 11 and the connecting column 2, so that the connection state of the utility model is reliable.

[0020] Further improvement, the connecting piece body 1 is centrally provided with a protruding portion 12. The setting of the protruding portion 12 makes the connecting piece body 1 have a certain deformation amount, when the battery cell expands, the connecting piece body 1 can produce elastic deformation to offset the pulling force caused by the expansion of the battery cell. On the other hand, when the connecting piece body 1 connects two battery cells with different heights, the deformation amount caused by the protruding portion 12 makes the welding of the two battery cells with the connecting piece body 1 not affect each other.

[0021] Further improvement, the connecting piece body 1 is centrally provided with a protruding portion 12. The setting of the protruding portion 12 makes the connecting piece body 1 have a certain deformation amount, when the battery cell expands, the connecting piece body 1 can produce elastic deformation to offset the pulling force caused by the expansion of the battery cell. On the other hand, when the connecting piece body 1 connects two battery cells with different heights, the deformation amount caused by the protruding portion 12 makes the welding of the two battery cells with the connecting piece body 1 not affect each other.

[0022] Further improvement, the connecting piece body 1 is aluminum connecting piece or copper connecting piece, copper, aluminum material has excellent formability and ductility for improving weldability and corrosion resistance, the surface of the connecting piece body 1 is plated with nickel plating layer.The surface resistivity of nickel plating layer is relatively stable, which can provide relatively stable contact resistance when the connecting piece contacts with other conductive parts, ensure the stable transmission of current, reduce the problems such as heat generation and energy loss caused by excessive contact resistance.

[0023] The working principle of the utility model

[0024] When installing, the side connecting port 11 arranged on the connecting piece body is close to and respectively contacts the adjacent connecting column 2, the utility model can make the connecting piece body connect the positive electrode of battery and the negative electrode of battery through the rotating mode, the connecting piece body is installed by rotating, the side connecting port 11 is provided with the opening of change, so that the process that the connecting column 2 enters the side connecting port 11 is simple and convenient, the connecting piece body 1 is matched with the connecting column 2, the side connecting port 11 is provided with the reliable friction force of the contact surface of the included angle between the inclined plane 111 and the connecting contact and the bottom plate 22 end, the polygon spanner that is adapted to the opening is stretched into the polygon opening 121, and the connecting piece body 1 can be easily rotated by rotating the spanner, so that the connecting piece body 1 and the connecting column 2 are further close, reliable friction force is obtained, and the utility model can simply complete installation.

[0025] When disassembling, the polygon spanner is stretched into the polygon opening 121, and the connecting piece body 1 is reversely rotated, so that the friction force between the connecting piece body 1 and the connecting column 2 is overcome, and the connecting piece body 1 can be simply and conveniently disassembled.

[0026] The above only is the preferred embodiment of the utility model, and is not used for limiting the utility model, any modification, equivalent replacement, improvement, etc. made within the design concept of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery cell connector structure, comprising a connector body (1) and a connector post (2), characterized in that: The adjacent connecting posts (2) are connected to each other through the connecting plate body (1). The connecting post (2) includes a connecting terminal (21) and a base plate (22). The outer diameter of the lower end of the connecting terminal (21) continuously decreases. The connecting terminal (21) is vertically connected to the base plate (22). There is an angle between the side surface of the connecting terminal (21) and the upper surface of the base plate (22). The base plate (22) contacts the positive or negative terminal of the battery. The side surface of the connecting plate body (1) is provided with a side connection port (11) with a continuously decreasing inner diameter. The connecting post (2) is adapted to the smallest inner diameter of the side connection port (11).

2. The cell connector structure according to claim 1, characterized in that: There are two side connection ports (11), which are respectively located at both ends of the connecting piece body (1). The opening directions of the side connection ports (11) at both ends of the connecting piece body (1) are opposite. The connecting posts (2) connected to the side connection ports (11) respectively contact the positive electrode and the negative electrode of the battery.

3. The cell connector structure according to claim 1, characterized in that: The side connection port (11) is provided with a slope (111), the slope (111) is adapted to the side surface of the connection terminal (21), and the slope of the slope (111) is greater than the slope of the angle between the side surface of the connection column (2) and the base plate (22).

4. The cell connector structure according to claim 1, characterized in that: The connecting piece body (1) has a protrusion (12) in the center.

5. The cell connector structure according to claim 4, characterized in that: The protrusion (12) is provided with a polygonal opening (121), wherein the polygon is hexagonal.

6. The cell connector structure according to claim 1, characterized in that: The connecting piece body (1) is an aluminum connecting piece or a copper connecting piece, and the surface of the connecting piece body (1) is plated with a nickel plating layer.

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