CN210956826U

CN210956826U - Lithium battery connecting plate with protective effect

Info

Publication number: CN210956826U
Application number: CN201922313007.XU
Authority: CN
Inventors: 刘冯; 张蓥川; 孙峥; 许锋炜
Original assignee: Luoyang Jiexin Energy Technology Co ltd
Current assignee: Luoyang Jiexin Energy Technology Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-07
Anticipated expiration: 2029-12-20

Abstract

A lithium battery connecting plate with a protection effect is used for series and parallel connection of a row of lithium battery packs and comprises a safety pipe clamp A welded on a pole column at one end of each lithium battery pack in a row, a safety pipe clamp B corresponding to the safety pipe clamp A and an insulating support used for connecting and supporting the safety pipe clamp A and the safety pipe clamp B; and a safety tube is arranged between each safety tube clamp A and each safety tube clamp B, each safety tube clamp B is communicated through a current conducting plate, and the current conducting plate is communicated with each corresponding safety tube clamp A through each safety tube. The utility model discloses can carry out charge-discharge current overload protection, overheat temperature protection to the lithium cell of a certain existing problem in the whole group battery effectively, can realize the safety control to power lithium cell group for the electric motor car with low costs, avoid utmost point individual lithium cell to take place burning, explosion even because of overheated in charging or the discharge process.

Description

Lithium battery connecting plate with protective effect

Technical Field

The utility model belongs to the technical field of the lithium cell technique and specifically relates to a lithium cell connecting plate with guard action is related to.

Background

Lithium batteries have been widely used because of their advantages of light weight, large capacity, no memory effect, etc. The rectangular lithium battery is usually used as a power battery for a new energy electric vehicle, and dozens or even hundreds of lithium batteries need to be connected in series or in parallel according to user requirements before the lithium batteries are put into use so as to meet the voltage and capacitance requirements of the electric vehicle.

It is known that very individual lithium batteries are burnt or even exploded due to overheating during charging or discharging. The lithium battery is overheated due to external reasons and self reasons, and the lithium battery is overheated due to external short circuit and the like. At present, high-grade electric vehicles are equipped with a BMS management system, and can acquire terminal voltage and temperature, charging and discharging current and total voltage of a battery pack of each lithium battery in a power battery pack in real time in the charging and discharging processes of the lithium batteries to prevent the batteries from being overcharged or overdischarged.

Because of the cost reason, common two-wheeled electric motor car, low-speed four-wheeled electric motor car is not equipped with BMS management system, just carry out simple cluster to the lithium cell group through the connecting plate, parallel connection, charge-discharge control system can only carry out charge-discharge overload protection to whole group battery, can not carry out charge-discharge overload protection to a certain lithium cell wherein, if overload appears in a certain lithium cell wherein, because this lithium cell is parallelly connected with other lithium cell clusters, the influence that overload current led to the fact charge-discharge control system is little, charge-discharge control system can not effectual cutting circuit cause the burning of overload lithium cell, even the explosion.

In addition, the charge and discharge control system only has one temperature sensor for detecting the average temperature of the whole battery box, and cannot specifically detect a certain lithium battery.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough in the background art, the utility model discloses a lithium cell connecting plate with guard action to solve the background art the problem.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a lithium battery connecting plate with a protection effect is used for series and parallel connection of a row of lithium battery packs and comprises a safety pipe clamp A welded on a pole column at one end of each lithium battery pack in a row, a safety pipe clamp B corresponding to the safety pipe clamp A and an insulating support used for connecting and supporting the safety pipe clamp A and the safety pipe clamp B; and a safety tube is arranged between each safety tube clamp A and each safety tube clamp B, each safety tube clamp B is communicated through a current conducting plate, and the current conducting plate is communicated with each corresponding safety tube clamp A through each safety tube.

Preferably, a welding connection plate is arranged at one end of the safety pipe clamp A welded with the pole at one end of the lithium battery pack.

Preferably, the insulating support is provided with a process hole avoiding welding of a safety pipe clamp A and a pole column at one end of the lithium battery pack.

Preferably, the fuse tube is a current overload fuse tube.

Preferably, the fuse tube is a thermal fuse tube.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the utility model discloses a lithium cell connecting plate with guard action can carry out charge-discharge current overload protection, overheat temperature protection to the lithium cell of a certain existing problem in the whole group battery effectively, can realize the safety control to power lithium cell group for the electric motor car with low-cost, avoids utmost point individual lithium cell to take place to burn, explode even because of overheated in charging or the discharge process.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial cross-sectional view of fig. 1.

In the figure: 1. a safety pipe clamp A; 2. a safety pipe clamp B; 3. an insulating support; 4. a fuse tube; 5. and a conductive plate.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A lithium battery connecting plate with a protection function is used for parallel connection of rows of lithium battery packs and comprises a row of safety pipe clamps A1 welded on positive poles of the lithium battery packs, a safety pipe clamp B2 corresponding to the safety pipe clamp A1, and an insulating bracket 3 used for connecting and supporting the safety pipe clamp A1 and the safety pipe clamp B2, as shown in figures 1-2; a fuse tube 4 is arranged between each fuse tube clamp A1 and each fuse tube clamp B2, and the fuse tube 4 is a current overload fuse tube. Each fuse clip B2 is conducted through the conductive plate 5, and the conductive plate 5 is conducted through each fuse tube 4 to each corresponding fuse clip a 1. When the lithium battery pack charges and discharges, due to the fact that current overload occurs to a certain lithium battery in the lithium battery pack due to external reasons or self reasons, the current overload protective tube is fused, the lithium battery is disconnected from other lithium batteries, and overheating is avoided.

In order to further improve the protection, the lithium battery connecting plate is similarly mounted on the negative pole of the lithium battery pack, except that the fuse 4 is a thermal fuse. When a certain lithium battery in the lithium battery pack is overloaded, the temperature rise is often generated along with the lithium battery, the temperature rise is conducted to the thermal fusing protective tube through the protective tube clamp A1 welded on the negative pole column, the thermal fusing protective tube fuses after the temperature reaches a threshold value, the lithium battery is cut off from being connected with other lithium batteries, and overheating is avoided.

In order to facilitate welding, a welding connection plate is arranged at one end of the fuse clamp A1 welded with one end pole of the lithium battery pack. The insulating support 3 is provided with a process hole for avoiding welding of the safety pipe clamp A1 and a pole at one end of the lithium battery pack.

By the above, the utility model discloses can carry out charge-discharge current overload protection, overheat temperature protection to the lithium cell of a certain block of existing problem in the whole group battery effectively, can realize the safety control to power lithium cell group for the electric motor car with low-cost, avoid utmost point individual lithium cell to take place burning, explosion even because of overheated in charging or the discharge process.

The part of the utility model not detailed is prior art. 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. The utility model provides a lithium cell connecting plate with guard action for the series-parallel connection of in bank lithium cell group, characterized by: the lithium battery pack comprises safety pipe clamps A (1) welded on a pole at one end of the lithium battery pack in a row, safety pipe clamps B (2) corresponding to the safety pipe clamps A (1), and an insulating support (3) for connecting and supporting the safety pipe clamps A (1) and the safety pipe clamps B (2); a safety pipe (4) is arranged between each safety pipe clamp A (1) and each safety pipe clamp B (2), each safety pipe clamp B (2) is conducted through a current conducting plate (5), and the current conducting plate (5) is conducted with each corresponding safety pipe clamp A (1) through each safety pipe (4).

2. The lithium battery connecting plate with protection as claimed in claim 1, wherein: and a welding connecting plate is arranged at one end of the safety pipe clamp A (1) welded with the pole at one end of the lithium battery pack.

3. A lithium battery connecting plate with a protective function as claimed in claim 1 or 2, wherein: and the insulating support (3) is provided with a process hole for avoiding welding of the safety pipe clamp A (1) and a pole column at one end of the lithium battery pack.

4. The lithium battery connecting plate with protection as claimed in claim 1, wherein: the protective tube (4) is a current overload protective tube.

5. The lithium battery connecting plate with protection as claimed in claim 1, wherein: the fuse tube (4) is a thermal fuse tube.