CN112713437A

CN112713437A - Battery safety connecting piece

Info

Publication number: CN112713437A
Application number: CN202011471507.7A
Authority: CN
Inventors: 杨瑞; 秦涛; 张雪云
Original assignee: System Electronic Technology Zhenjiang Co ltd
Current assignee: System Electronic Technology Zhenjiang Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-27

Abstract

A safe connection mode of a battery comprises a metal plate and a plastic plate, wherein a plurality of electric connection units are arranged on the metal plate in an array distribution mode, each electric connection unit comprises two symmetrically arranged strip-shaped single sheets, and the strip-shaped single sheets are connected with a metal plate main body through narrow sheet bodies positioned on the upper portion and the lower portion of the outer side of each strip-shaped single sheet; a plurality of first through holes corresponding to the power connection monomers are arranged on the plastic plate; the metal plate and the strip-shaped single sheet are made of metal A, and the narrow sheet body is made of metal B, wherein the melting point of the metal A is greater than that of the metal B; according to the invention, the metal connecting material is fixed on the plastic material, so that the thin wall and the thin and narrow structure of the metal material can be effectively protected and cannot be damaged due to the movement of the connected body; the connecting piece is integrally made of nickel with a large melting point, the narrow sheet body material of the protective part is made of aluminum with a small melting point, and the battery core can be effectively disconnected when out of control, so that the safety of the battery pack is greatly improved.

Description

Battery safety connecting piece

Technical Field

The invention relates to the technical field of battery connection, in particular to a battery safety connecting piece.

Background

At present, the electric quantity of the power battery industry or the energy storage system is different from thousands of watt-hour to thousands of watt-hour, and the large-scale energy storage system even can reach megawatt-hour. The number of the battery cores in the whole system is different from dozens to tens of thousands, and the battery cores are generally assembled through a fixed structure forming module framework for convenient installation. Often weld through nickel piece or nickel-plated steel sheet between electric core and the busbar and realize, and the electric core interval generally can be very little in the module structure, in case single electric core appears out of control and can't break off power connection, this short circuit route will be regarded as outside short circuit route by other batteries because the parallelly connected of nickel piece, therefore see through parallelly connected nickel piece transmission heavy current (short-circuit current), this short circuit current makes the battery of short circuit in taking place produce more heat and make the accident enlarge in addition, also can lead to other batteries to lead to the temperature to rise to exceeding safe operating temperature because of outside short circuit, whole module will face the extreme phenomena such as firing, explosion and appear. Therefore, how to effectively disconnect the power connection when the unit cell is out of control is very necessary.

The existing safety device mainly has an aluminum wire connection and a long and narrow nickel sheet connection, and the two methods have the following problems:

(1) the aluminum wire connection requires that the connected body can not generate small displacement, otherwise, the aluminum wire can be broken, and a complex battery cell fixing process is needed to ensure that the connected body does not generate displacement, so that the manufacturing difficulty is increased;

(2) although the long and narrow nickel plate connection process has a certain protection function, the protection effect is not ideal due to the material of the nickel plate connection process.

Disclosure of Invention

The invention provides a battery safety connecting piece, which aims to overcome the existing defects and comprises a metal plate and a plastic plate, wherein a plurality of electric connection monomers are arranged on the metal plate in an array distribution, each electric connection monomer comprises two strip-shaped single sheets which are symmetrically arranged, and the strip-shaped single sheets are connected with a metal plate main body through narrow sheet bodies positioned at the upper part and the lower part of the outer side of each strip-shaped single sheet; a plurality of first through holes corresponding to the power connection monomers are formed in the plastic plate;

the metal plate and the strip-shaped single sheet are made of metal A, and the narrow sheet body is made of metal B, wherein the melting point of the metal A is greater than that of the metal B;

preferably, the width of the narrow sheet body is 0.5-1.0 mm.

Preferably, the electric monomers are distributed in a 5 x 8 array.

Preferably, the metal a is nickel and the metal B is aluminum.

Preferably, a plurality of first heat dissipation holes are formed between the two rows of connected power connection monomers.

Preferably, the plastic plate is further provided with a second through hole corresponding to the first heat dissipation hole.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, the metal connecting material is fixed on the plastic material, so that the thin wall and the thin and narrow structure of the metal material can be effectively protected and cannot be damaged due to the movement of the connected body;

(2) the connecting piece is integrally made of nickel with a large melting point, the narrow sheet body material of the protection part is made of aluminum with a small melting point, the electric core can be disconnected effectively when out of control, the product is protected, serious consequences can not be generated, and the safety of the battery pack is greatly improved.

Drawings

Fig. 1 is a schematic perspective view of a battery safety connector according to the present invention;

fig. 2 is a plan view of a battery safety connection member according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic diagram of a conventional cell structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a battery safety connector comprises a metal plate 1 and a plastic plate 2, wherein a plurality of electric connection units 11 distributed in an array are arranged on the metal plate 1, each electric connection unit 11 comprises two strip-shaped single sheets 111 symmetrically arranged, and the strip-shaped single sheets 111 are connected with a main body of the metal plate 1 through narrow sheet bodies 112 positioned at the upper part and the lower part of the outer side of each strip-shaped single sheet 111; the plastic plate 2 is provided with a plurality of first through holes 21 corresponding to the electric connection units 11.

The metal plate 1 and the strip-shaped single sheets 111 are made of metal A, and the narrow sheet bodies 112 are made of metal B, wherein the melting point of the metal A is greater than that of the metal B.

In the technical scheme, the width of the narrow sheet body is 0.5-1.0 mm.

In the above technical solution, the electric cells 11 are distributed in a 5 × 8 array.

In the above technical scheme, the metal a is nickel, and the metal B is aluminum.

In the above technical solution, a plurality of first heat dissipation holes 12 are disposed between two rows of connected power cells 11.

In the above technical solution, the plastic plate 2 is further provided with a second through hole 22 corresponding to the first heat dissipation hole 12.

As shown in fig. 4, a conventional battery cell, model 18650, is formed by connecting 40 battery cells in series through nickel plates, that is, connecting the positive and negative electrodes of the battery cell through the connecting piece; after the connection, if there is electric core to take place short circuit trouble, because narrow shape lamellar body adopts the less metallic aluminum of melting point to make, so too big electric current can instantaneously burn out the narrow shape lamellar body of this electric core department to prevent the fault diffusion, influence the normal use of other electric cores.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A battery safety connecting piece is characterized by comprising a metal plate and a plastic plate, wherein a plurality of electric connection units are arranged on the metal plate in an array distribution mode, each electric connection unit comprises two symmetrically arranged strip-shaped single pieces, and the strip-shaped single pieces are connected with a metal plate main body through narrow piece bodies positioned on the upper portion and the lower portion of the outer side of each strip-shaped single piece; a plurality of first through holes corresponding to the power connection monomers are formed in the plastic plate;

the metal plate and the strip-shaped single sheet are made of metal A, and the narrow sheet body is made of metal B, wherein the melting point of the metal A is larger than that of the metal B.

2. A battery safety coupling according to claim 1, wherein the width of the narrow blade is 0.5-1.0 mm.

3. A method according to claim 1, wherein the electrically connecting cells are arranged in a 5 x 8 array.

4. The battery safety connection method according to claim 1, wherein the metal A is nickel and the metal B is aluminum.

5. The method of claim 1, wherein a plurality of first heat dissipation holes are formed between two rows of connected power cells.

6. The method as claimed in claim 1 or 5, wherein the plastic plate is further provided with a second through hole corresponding to the first heat dissipation hole.