CN212517442U

CN212517442U - Prevent electric core extrusion thermal runaway protection architecture

Info

Publication number: CN212517442U
Application number: CN202021420476.8U
Authority: CN
Inventors: 陈圣旺
Original assignee: Fujian Scud Power Technology Co Ltd
Current assignee: Fujian Scud Power Technology Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-02-09
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a prevent electric core extrusion thermal runaway protection architecture. The positive pole of electricity core sets up connection piece I, set up Fuse on the connection piece I, set up thermal resistance on the connection piece I, thermal resistance is 90 degrees settings with Fuse, the tail end of connection piece I sets up the sawtooth, the sawtooth is in the electricity core middle part, there is 1-2 mm's clearance on the terminal of sawtooth and the surface of electricity core. The utility model discloses a when inside short circuit takes place for electric core, the electric quantity of electric core reduces to guarantee that the battery takes place and seriously extrudes can not take place serious thermal runaway.

Description

Prevent electric core extrusion thermal runaway protection architecture

Technical Field

The utility model relates to a battery powered field specifically is a prevent electric core extrusion thermal runaway protection architecture.

Background

With the development of electronic products, various mobile devices use a large number of lithium ion batteries, and the improvement of the use safety of the batteries is a problem which needs to be solved urgently at present. When the battery is used, the main point of ensuring the safe operation of the battery is to ensure that the battery core does not generate thermal runaway. After the battery is seriously extruded, the battery core can be seriously deformed, so that the internal short circuit of the battery core causes the thermal runaway of the battery core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent electric core extrusion thermal runaway protection architecture, when making electric core take place the internal short circuit, the electric quantity of electric core reduces to guarantee that the battery takes place and seriously extrudes can not take place serious thermal runaway.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a prevent electric core extrusion thermal runaway protection structure, protection structure includes electric core 1, heat resistance 2, connection piece I and connection piece II 8, electric core 1's positive pole 1-1 sets up connection piece I, electric core 1's negative pole sets up connection piece II 8, set up Fuse4 on the connection piece I, set up heat resistance 2 on the connection piece I, heat resistance 2 is 90 degrees settings with Fuse4, the tail end of connection piece I sets up sawtooth 5, sawtooth 5 is in electric core middle part, there is 1-2 mm's clearance at the end of sawtooth 5 and the surface of electric core 1.

Further, connection piece I includes L type connection piece I3, type of falling L connection piece I6 and switches on piece 7, set up Fuse4 on L type connection piece I3, the horizontal piece of type of falling L connection piece I6 is connected to the vertical piece of L type connection piece I3, lead on piece 7 is connected to the vertical piece of type of falling L connection piece I6, lead on piece 7 is on a parallel with 1 bottom surface of electric core, set up arc sawtooth 5 on the lead on piece 7.

Further, the head of the battery cell 1 is a positive electrode 1-1, the bottom and the body of the battery cell 1 are negative electrodes 1-2, and an insulating film 1-3 is wrapped outside the battery cell 1.

Furthermore, the connecting piece I is made of nickel or aluminum.

Furthermore, the Fuse4 of the connecting piece I is two rectangles with the width of 1.5-2.5mm and the length of 5-8 mm.

Further, the resistance value of the heat-resistant resistor 2 is 1-2 times of the internal resistance of the battery cell 1, and the resistance value of the heat-resistant resistor 2 is 20-50 mohm.

Further, one end of the Fuse4 is connected to one end of the conducting strip 7 and the positive electrode 1-1 of the battery cell, the other end of the conducting strip 7 is connected to one end of the thermal resistance 2, and the other end of the thermal resistance 2 is connected to the negative electrode 1-2 of the battery cell.

Has the advantages that:

when the battery is extruded and the battery cells are deformed, the electric quantity of the battery cells can be released before each battery cell generates internal short circuit, so that the electric quantity of the battery cells is reduced; when the internal short circuit of the battery cell occurs, the electric quantity of the battery cell is greatly reduced, so that the battery is ensured to be seriously extruded and serious thermal runaway cannot occur.

Drawings

Fig. 1 is the electric core structure schematic diagram of the utility model.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, in the embodiment of the present invention,

example 1

Furthermore, the connecting piece I is made of nickel or aluminum.

As shown in fig. 1, the head of the cell is a positive electrode, the bottom and the body of the cell are negative electrodes, and the outside of the cell is covered with an insulating film to protect the cell. As shown in fig. 2, the positive electrode of the battery cell is connected with a connecting piece i with a Fuse, the positive electrode of the battery cell is connected with a high-temperature resistance, the high-temperature resistance is connected with a connecting piece i with a sawtooth at the tail end, the tail end of the connecting piece i with the sawtooth is positioned at the middle position of the battery cell, and a gap of 1-2mm is formed between the tail end of the sawtooth on the connecting piece i and the surface of the battery cell; the negative pole of electricity core connects a connection piece I. When the battery receives extrusion deformation, connection piece I of band saw tooth receives the extrusion force and can oppress electric core surface, leads to the sawtooth to puncture electric core surface's insulating film to with this body contact of electric core (electric core negative pole), lead to the positive negative pole short circuit of this electric core, the electric quantity of electric core begins to release. Because the short circuit is connected with a high-temperature resistance in series, the resistance value of the resistance is 1-2 times (about 20-50mohm) of the internal resistance of the battery cell, so that the heat generated in the electricity release process of the battery cell can be 1/3-1/2 concentrated on the heat-resistant resistance, and the thermal runaway of the battery cell caused by a large amount of heat accumulated by the battery cell can be avoided. Pierce through electric core insulating film at area sawtooth connection piece I, make electric core short circuit in the twinkling of an eye, other electric cores of establishing ties with this electric core or parallelly connected have heavy current through taking Fuse connection piece I, make Fuse fusing, thereby other parts of this electric core and battery package disconnection protection battery package do not short circuit.

Example 2

The Fuse4 of the tab I in example 1 was two rectangles of 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm and 2.4mm in width and 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm and 8mm in length, and the Fuse4 was arbitrarily combined with the width of the Fuse.

Example 3

The resistance value of the heat-resistant resistor 2 in example 1 was 25mohm or 40 mohm.

Example 4

In step 3 of example 1, 0.34 times, 0.35 times, 0.36 times, 0.37 times, 0.38 times, 0.39 times, 0.40 times, 0.41 times, 0.42 times, 0.43 times, 0.44 times, 0.45 times, 0.46 times, 0.47 times, 0.48 times, or 0.49 times of the amount of heat generated during the initial discharge of the electric charge is concentrated on the heat-resistant resistor 2.

Example 5

The end of the saw tooth 5 in example 1 has a gap of 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm or 1.9mm from the surface of the battery cell 1.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a prevent electric core extrusion thermal runaway protection structure, a serial communication port, protection architecture includes electric core (1), heat-resisting resistance (2), connection piece I and connection piece II (8), the positive pole of electric core (1) sets up connection piece I, the negative pole of electric core (1) sets up connection piece II (8), set up Fuse (4) on the connection piece I, set up heat-resisting resistance (2) on the connection piece I, heat-resisting resistance (2) are 90 degrees settings with Fuse (4), the tail end of connection piece I sets up sawtooth (5), sawtooth (5) are in electric core middle part, the terminal of sawtooth (5) has 1-2 mm's clearance with the surface of electric core (1).

2. The structure of claim 1, characterized in that the connection piece I comprises an L-shaped connection piece I (3), an inverted L-shaped connection piece I (6) and a conduction piece (7), a Fuse (4) is arranged on the L-shaped connection piece I (3), a vertical piece of the L-shaped connection piece I (3) is connected with a transverse piece of the inverted L-shaped connection piece I (6), the vertical piece of the inverted L-shaped connection piece I (6) is connected with the conduction piece (7), the conduction piece (7) is parallel to the bottom surface of the battery cell (1), and the conduction piece (7) is provided with arc-shaped sawteeth (5).

3. The structure for preventing the core extrusion thermal runaway protection according to claim 1, characterized in that the head of the cell (1) is a positive electrode (1-1), the bottom and the body of the cell (1) are negative electrodes (1-2), and the outside of the cell (1) is wrapped with an insulating film (1-3).

4. The structure for preventing the core extrusion thermal runaway of claim 2, wherein the connecting sheet I is made of nickel or aluminum.

5. The structure of claim 2, characterized in that the Fuse (4) of the connecting piece i is two rectangles with a width of 1.5-2.5mm and a length of 5-8 mm.

6. The structure for preventing the core extrusion thermal runaway protection according to claim 1, wherein the resistance value of the heat-resistant resistor (2) is 1-2 times of the internal resistance of the core (1), and the resistance value of the heat-resistant resistor (2) is 20-50 mohm.

7. The structure of claim 1, characterized in that one end of the Fuse (4) is connected to one end of the conductive sheet (7) and the positive electrode of the electric core, respectively, the other end of the conductive sheet (7) is connected to one end of the heat-resistant resistor (2), and the other end of the heat-resistant resistor (2) is connected to the negative electrode of the electric core.