CN203277515U - A cover plate for a prismatic lithium-ion battery - Google Patents

Abstract

The utility model discloses a cover plate for a square lithium-ion battery, which comprises a pole plate, a positive terminal and a negative pole terminal. Symmetrical oblique holes are opened on both sides of the central line of the pole plate, and the oblique holes are connected with the upper and lower sides of the pole plate. The surface forms a "Z"-shaped bend, and the positive terminal and the negative terminal protrude from the inclined hole through the plate and the surface insulating sealing sheet and fix them. The protruding part is used for welding with the lithium-ion battery; the square power lithium-ion battery The cover plate can effectively reduce the contact internal resistance of the electrode terminal assembly, reduce the invalid space inside the battery, and has a simple structure.

Description

A cover plate for a prismatic lithium-ion battery

technical field

The utility model relates to a cover plate for a square lithium ion battery, in particular to a cover plate for a square power lithium ion battery. the

Background technique

With the increase of car ownership, the exhaust pollution of traditional diesel locomotives powered by fossil fuels has attracted increasing attention. Topics such as PM2.5 have penetrated into people's lives, and new energy vehicles, especially electric vehicles, have attracted increasing attention. The power lithium-ion battery required for electric vehicles requires conditions such as high capacity and high power, so the choice of cover plate is particularly important. In the structure of the traditional lithium-ion power battery, the structure of the quadrupole plus the connecting piece or the stud structure is generally used, which is relatively complicated. When the components are assembled by riveting, the contact internal resistance is large, and the connecting piece is relatively small. It is long and needs to be bent 2-3 times in an "S" shape, which occupies the internal space of the battery and is not conducive to the improvement of battery capacity. the

Utility model content

The purpose of the utility model is to make up for the defects of the prior art and provide a cover plate for a square lithium ion battery, which can effectively reduce the contact internal resistance of the electrode terminal assembly and reduce the invalid space inside the battery. the

The utility model is achieved through the following technical solutions:

A cover plate for a square power lithium-ion battery, including a pole plate, a positive terminal, and a negative pole. There are symmetrical inclined holes on both sides of the center line of the pole plate, and the inclined holes form a “Z” shape with the upper and lower surfaces of the pole plate. The two surfaces of the pole plate are provided with insulating sealing gaskets near the opening of the inclined hole. The insulating sealing gasket has a certain thickness. Fixing, the protruding part is used for welding with the lithium ion battery; the surface of the positive or negative terminal fixed in the inclined hole is covered with insulating ceramic material.

The electrode section of the lithium battery cover plate is an integral structure, which avoids the riveting between the components in the traditional cover plate, and reduces the contact internal resistance of the electrode terminal assembly; Core welding, the surface of the positive or negative terminal is covered with insulating ceramic material, which avoids the short circuit between the terminal and the plate; the positive or negative terminal of the tab and the cover plate is easy to weld, which is convenient for the series and parallel connection of the battery pack; when assembling the battery, the pole The ears are easy to bend, which saves more space than the traditional "S" shape. the

The utility model has the advantages of:

The cover plate can effectively reduce the contact internal resistance of the electrode terminal assembly, reduce the invalid space inside the battery, and has the advantage of simple structure.

Description of drawings

FIG. 1 is a schematic diagram of a prismatic lithium-ion battery cover according to an embodiment of the present invention. the

Fig. 2 is a front view of a prismatic lithium-ion battery cover according to an embodiment of the present invention. the

Fig. 3 is a top view of the prismatic lithium-ion battery cover according to the embodiment of the present invention. the

Fig. 4 is a side cross-sectional view of a prismatic lithium-ion battery cover according to an embodiment of the present invention. the

FIG. 5 is an enlarged schematic diagram of A shown in FIG. 4 . the

Detailed ways

As shown in Figure 1, a cover plate of a square power lithium-ion battery includes a pole plate 3, a positive terminal 1 and a negative pole terminal 2, symmetrical oblique holes 5 are opened on both sides of the centerline of the pole plate 3, and the oblique The hole 5 and the upper and lower surfaces of the pole plate 3 form a "Z" bend. The two surfaces of the pole plate 3 are provided with an insulating sealing gasket 4 near the opening of the inclined hole 5. The insulating sealing gasket 4 has a certain thickness. The positive terminal 1 and the negative terminal 2 protrude from the inclined hole 5 through the pole plate 3 and the surface insulating sealing sheet 4 and fix them; the surface of the positive and negative terminals fixed in the inclined hole 5 is covered with an insulating ceramic material 6 . the

Those skilled in the art can make various modifications to the above content without departing from the spirit and scope of the present invention defined by the claims. Therefore, the scope of the present invention is not limited to the above description, but is determined by the scope of the claims. the

Claims (1)

1. the cover plate of a square power lithium ion cell, include pole plate, positive terminal and negative terminal, it is characterized in that: described pole plate center line both sides have symmetrical inclined hole, described inclined hole and pole plate upper and lower surface consist of the bending of " Z " shape, two surfaces of described pole plate are provided with the insulated enclosure pad near the inclined hole opening part, and the insulated enclosure pad has certain thickness; Positive terminal and negative terminal pass pole plate and the surface insulation diaphragm seal stretches out and fixes from inclined hole, and extension is used for welding with lithium-ion electric core; The described negative or positive electrode terminal surfaces that is fixed in inclined hole is coated with insulating ceramic materials.

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