CN211045654U - Monitoring power lithium battery shell potential structure - Google Patents

Abstract

The utility model discloses a potential structure of a power lithium battery casing. A connecting piece is located on the top of a cover plate and one end is fixedly connected with the cover plate. The connecting piece is provided with an electrical connection position, and the electrical connection position is provided with an external electrical connection. Simple structure, low cost, the battery case potential is conducted to the connecting piece, the voltage collection wire harness can be tightly connected with the connecting piece through the installation component, the battery can be used reliably and accurately monitor the power lithium battery case potential can effectively Monitor the voltage of the cell casing and the negative electrode, and discover in advance a series of power lithium battery failures caused by the corrosion and leakage of the casing caused by the short circuit between the cell casing and the negative electrode.

Description

A structure for monitoring the potential of the power lithium battery case

technical field

The utility model relates to the field of power lithium batteries, in particular to a structure for monitoring the electric potential of a power lithium battery casing.

Background technique

Lithium batteries are widely used in electric vehicles, backup power systems, and microgrid energy storage systems due to their high energy density and long life. The power lithium battery contains a winding core, an electrolyte, a shell, a cover plate and other structures. In traditional battery pack or single cell monitoring, we usually only monitor the open circuit voltage, temperature rise and current of the battery pack or single cell.

However, the casing often fails due to the breakage of the tabs, the battery leakage caused by the corrosion of the casing caused by the short circuit of the negative electrode caused by bad reasons such as the powder at the bottom of the battery and the metal wire of the pole piece.

Utility model content

In order to solve the technical problems existing in the background technology, the utility model proposes a structure for monitoring the electric potential of a power lithium battery casing.

The electric potential structure of a power lithium battery casing proposed by the utility model comprises: a cover plate and a connecting piece;

The connecting piece is located on the top of the cover plate, and one end is fixedly connected with the cover plate. The connecting piece is provided with an electrical connection position, and an installation component electrically connected to the outside is arranged on the electrical connection position.

Preferably, the electrical connection position is provided with a mounting hole, the mounting assembly includes a bolt and a nut, the nut is located on one side of the mounting hole, and one end of the bolt passes through the mounting hole and threadedly engages with the nut.

Preferably, the connecting piece includes a fixing portion and a connecting portion which are connected in sequence, the fixing portion is fixedly connected to the cover plate, the connecting portion protrudes from the cover plate, and the electrical connection position is located on the connecting portion.

Preferably, the fixing portion is welded and fixed to the cover plate.

Preferably, the connecting piece and the cover plate are made of the same metal material.

Preferably, both the connecting piece and the cover plate are made of aluminum material.

Preferably, it also includes a casing, the cover plate is mounted on the casing, and the casing is also made of aluminum material.

Preferably, the connecting piece has an L-shaped structure, and the fixing portion and the connecting portion are vertically arranged.

In the utility model, the proposed monitoring power lithium battery shell potential structure, the connecting piece is located on the top of the cover plate and one end is fixedly connected with the cover plate, the connecting piece is provided with an electrical connection position, and the electrical connection position is provided with an external electrical connection. The connected installation assembly; the structure is simple, the cost is low, the potential of the battery shell is conducted to the connecting piece, and the voltage collection wire harness can be firmly connected to the connecting piece through the installation assembly, and the battery can be used reliably and accurately. Effectively monitor the voltage of the cell casing and the negative electrode, and discover in advance a series of power lithium battery failures caused by the corrosion and leakage of the casing caused by the short circuit between the cell casing and the negative electrode.

Description of drawings

FIG. 1 is a schematic structural diagram of a monitoring power lithium battery casing potential structure proposed by the utility model.

FIG. 2 is a schematic structural diagram of the connecting piece of FIG. 1 .

Detailed ways

As shown in FIGS. 1 and 2 , FIG. 1 is a schematic structural diagram of a power lithium battery casing potential structure proposed by the present invention, and FIG. 2 is a structural schematic diagram of the connecting piece of FIG. 1 .

Referring to Figures 1 and 2, a structure for monitoring the electric potential of a power lithium battery casing proposed by the present invention includes: a cover plate 1 and a connecting piece 2;

The connecting piece 2 is located on the top of the cover plate 1 and one end is fixedly connected with the cover plate 1 . The connecting piece 2 is provided with an electrical connection position, and the electrical connection position is provided with an installation component electrically connected to the outside.

In this embodiment, in the proposed monitoring power lithium battery case potential structure, the connecting piece is located on the top of the cover plate and one end is fixedly connected to the cover plate, and the connecting piece is provided with an electrical connection position, and the electrical connection position is provided with an external connection. Electrically connected installation assembly; simple structure and low cost, the battery casing potential is conducted to the connecting piece, the voltage collection wire harness can be tightly connected to the connecting piece through the installation assembly, and the power lithium battery casing potential can be monitored reliably and accurately when the battery is in use. It can effectively monitor the voltage of the cell casing and the negative electrode, and discover in advance a series of power lithium battery failures caused by the corrosion and leakage of the casing caused by the short circuit between the cell casing and the negative electrode.

In a specific embodiment of the installation assembly, the electrical connection position is provided with an installation hole, the installation assembly includes a bolt 3 and a nut 4, the nut 4 is located on one side of the installation hole, and one end of the bolt 3 passes through the installation hole It is threaded with nut 4; during installation, the voltage collection wire harness is fastened to the connection piece through bolts and nuts, so that the electric potential on the battery cover can be monitored by detecting the electric potential of the connection piece.

In the specific embodiment of the connecting piece, the connecting piece 2 includes a fixing portion 21 and a connecting portion 22 connected in sequence, the fixing portion 21 is fixedly connected with the cover plate 1, and the connecting portion 22 extends from the cover plate 1, so The electrical connection position is located on the connection portion 22 .

In a further specific embodiment, the connecting piece 2 has an L-shaped structure, and the fixing portion 21 and the connecting portion 22 are arranged vertically.

In a specific fixing method, the fixing portion 21 is welded and fixed with the cover plate 1 , which is low in cost and ensures the reliability of installation.

In the material selection, the connecting piece 2 and the cover plate 1 are made of the same metal material; preferably, the connecting piece 2 and the cover plate 1 are made of aluminum material, which ensures the reliability of welding on the one hand, and the electric potential on the other hand. Not affected by material.

In order to ensure the reliability of detection, the potential structure of this embodiment further includes a casing 5, the cover plate 1 is installed on the casing 5, and the casing 5 is also made of aluminum material.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (8)

1. A monitoring power lithium battery casing potential structure, characterized in that, comprising: a cover plate (1), a connecting piece (2); The connecting piece (2) is located on the top of the cover plate (1), and one end is fixedly connected with the cover plate (1). The connecting piece (2) is provided with an electrical connection position, and an installation component electrically connected to the outside is arranged on the electrical connection position. . 2. The monitoring power lithium battery casing potential structure according to claim 1, characterized in that, a mounting hole is provided on the electrical connection position, and the mounting assembly comprises a bolt (3) and a nut (4), and the nut ( 4) Located on one side of the mounting hole, one end of the bolt (3) passes through the mounting hole and is threaded with the nut (4). 3. The monitoring power lithium battery case potential structure according to claim 1, wherein the connecting piece (2) comprises a fixing part (21) and a connecting part (22) connected in sequence, and the fixing part (21) It is fixedly connected with the cover plate (1), the connecting portion (22) protrudes from the cover plate (1), and the electrical connection position is located on the connecting portion (22). 4. The structure for monitoring the electric potential of a power lithium battery case according to claim 3, wherein the fixing portion (21) is fixed to the cover plate (1) by welding. 5. The monitoring power lithium battery case potential structure according to claim 4, characterized in that the connecting piece (2) and the cover plate (1) are made of the same metal material. 6. The monitoring power lithium battery casing potential structure according to claim 5, characterized in that, the connecting piece (2) and the cover plate (1) are made of aluminum material. 7. The monitoring power lithium battery casing potential structure according to claim 6, characterized in that it further comprises a casing (5), the cover plate (1) is mounted on the casing (5), and the casing (5) is also Made of aluminum material. 8 . The potential structure of the monitoring power lithium battery case according to claim 3 , wherein the connecting piece ( 2 ) has an L-shaped structure, and the fixing part ( 21 ) and the connecting part ( 22 ) are arranged vertically. 9 .

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