CN103490026A - Safety protection structure for storage battery - Google Patents

Abstract

The present invention provides a safety protection structure for storage batteries, the structure comprising: a casing 2, a base 6 and a relay 12; a lithium ion battery 1 is arranged between the positive terminal 7 and the negative terminal 8 of the base 6, and the improvement is that, The relay 12 includes a temperature sensor 13 and a signal line 14, the temperature sensor 13 is connected to the lithium-ion battery 1; the positive terminal 7 and the negative terminal 8 are respectively connected to the positive connection line 10 and the negative connection line 11. Compared with the prior art, the safety protection structure for the storage battery provided by the present invention is simple in structure, easy to implement, active protection, timely, fast and effective discharge of inert gas for isolation, preventing lithium-ion batteries from exploding and burning due to high temperature, Significantly improve the safety of lithium-ion batteries.

Description

A safety protection structure for storage battery

technical field

The invention relates to a safety protection structure, in particular to a safety protection structure for storage batteries.

Background technique

With the development of microelectronics technology, miniaturized equipment is increasing day by day, which puts forward high requirements on power supply. Lithium batteries are widely used in many aspects due to their excellent performance in many aspects, such as mobile phones, handheld computers, notebook computers, power tools, electric vehicles, street lamp backup power, navigation lights, video cameras, cameras, small household appliances and even Military equipment and satellites. Lithium batteries are also known as "the most promising chemical power source", and even called "extreme batteries" or "last generation batteries".

In addition, from the perspective of environmental protection, due to the presence of cadmium, mercury, lead and other elements in battery raw materials such as lead-acid batteries, the World Environmental Protection Organization has long listed these substances in this battery as harmful substances. Based on this, lithium batteries are completely It can be called a "green" battery.

The emergence of lithium-ion batteries and their subsequent continuous improvement and perfection have led to the development of related industries, such as the rapid development of mobile phones, handheld computers, cameras, notebook computers, and other small portable electric devices. In particular, the rapid growth of portable electrical appliances has opened up broad prospects for the application of lithium-ion batteries. At present, more than 60% of the batteries used in these products are lithium-ion batteries.

At present, lead-acid batteries are the most widely used in electric vehicles. With the development of electric vehicle technology, in addition to environmental protection considerations, lead-acid batteries have many disadvantages such as low energy density, slow charging speed, and short life. It is the general trend to replace it with better batteries.

The newly developed power sources mainly include sodium-sulfur batteries, nickel-cadmium batteries, lithium batteries, fuel cells, flywheel batteries, etc. The application of these new power sources has opened up a broader prospect for the development of electric vehicles.

With the continuous improvement of environmental protection requirements, many large companies at home and abroad have stepped up research on electric vehicles. The most important thing in the research of electric vehicles is the research on power supply. Among them, large and high-power nickel-hydrogen batteries, large lithium-ion batteries and large supercapacitors have all successively become important power sources for electric vehicles. Based on the unique advantages of small size, light weight and high energy, lithium-ion batteries are regarded as the preferred power source for light-duty high-energy power batteries for electric vehicles in the future. From the present point of view, people are most optimistic about the prospect of lithium-ion batteries. It can be seen that there is still a lot of room for development in lithium battery research.

After several years of more in-depth research on lithium-ion batteries, great progress has now been made. Especially since this century, large lithium-ion batteries have begun to be used in pure electric vehicles and hybrid vehicles. These electric vehicles all have broad development prospects. Due to the vigorous development of electric vehicles, the development of lithium-ion battery technology has also been promoted.

Lithium-ion battery is no exception, as everything has two sides. It is not perfect, and it still has some shortcomings, such as relatively high cost, and the discharge rate is not high at low temperature. With the continuous improvement of the preparation process, the advantages of lithium-ion batteries will become increasingly obvious.

The present inventors have found that lithium-ion batteries are prone to oxidation-reduction reactions at high temperatures, and metal lithium is precipitated. When the shell is broken, direct contact with air will cause combustion, and at the same time ignite the electrolyte, a strong flame will occur, and the gas will expand rapidly. explode.

After long-term observation and research, the inventors have found that they have designed a safety protection structure for storage batteries, which can effectively prevent the explosion and combustion of lithium-ion batteries.

Contents of the invention

The purpose of the present invention is to provide a safety protection structure for batteries, which can actively protect, timely, quickly and effectively discharge inert gas to isolate the batteries, and prevent lithium ion batteries from exploding and burning due to high temperature.

The object of the present invention is to adopt following technical scheme to realize:

A safety protection structure for storage batteries provided by the present invention, said structure includes: a housing 2, a base 6 and a relay 12; a lithium ion battery 1 is arranged between the positive terminal 7 and the negative terminal 8 of the base 6, and its improvement The difference is that the relay 12 includes a temperature sensor 13 and a signal line 14, the temperature sensor 13 is connected to the lithium-ion battery 1; the positive terminal 7 and the negative terminal 8 are respectively connected to the positive connection line 10 and the negative connection line 11 connections.

Wherein, the shell 2 is Ω-shaped, with an air inlet 4 and an air outlet 5 on the top, and an installation hole 3 on the bottom.

Wherein, the base 6 is provided with a mounting hole 3' matching the mounting hole 3.

Wherein, the housing 2 and the base 6 are connected by bolts.

Wherein, the positive connecting wire 10 and the negative connecting wire 11 are connected to an external circuit.

Wherein, the lithium ion battery 1 is cylindrical, and its two ends are positive and negative electrodes.

Wherein, the temperature sensor 13 is fixedly arranged on the lithium-ion battery 1 through a hole 9 located on one side of the central axis of the positive terminal 7 and the negative terminal 8 .

Wherein, the signal line 14 is controlled by the temperature sensor 13 to issue an instruction to discharge inert gas into the casing 2 .

Compared with prior art, the beneficial effect that the present invention reaches is:

1. The safety protection structure for the storage battery provided by the present invention has a simple structure and is easy to implement.

2. The safety protection structure for the storage battery provided by the present invention can effectively prevent external damage to the battery.

3. The safety protection structure for the storage battery provided by the present invention can discharge inert gas to effectively isolate the lithium ion battery.

4. The safety protection structure for the storage battery provided by the present invention prevents the lithium-ion battery from exploding and burning due to high temperature, and significantly improves the safety of the lithium-ion battery.

Description of drawings

Fig. 1 is: the lithium ion battery structure schematic diagram provided by the present invention;

Fig. 2 is: a schematic diagram of the shell structure provided by the present invention;

Figure 3 is a bottom view of the housing provided by the present invention;

Figure 4 is: a side sectional view of the housing provided by the present invention;

Fig. 5 is: a schematic diagram of the base structure provided by the present invention;

Figure 6 is a schematic diagram of the assembly structure of the lithium-ion battery and the base provided by the present invention;

Fig. 7 is: the structural representation of the relay provided by the present invention;

Figure 8 is a schematic diagram of the assembly structure of the lithium-ion battery, the base, and the relay provided by the present invention;

Fig. 9 is a schematic diagram of the general assembly structure of the safety protection structure for the storage battery provided by the present invention;

Among them: 1. Li-ion battery; 2. Shell; 3. Mounting hole; 3', Mounting hole; 4. Air inlet; 5. Exhaust port; 6. Base; 7. Positive terminal; 8. Negative terminal; 9 , hole; 10, positive connection line; 11, negative connection line; 12, relay; 13, temperature sensor; 14, signal line.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

This embodiment takes the safety protection structure for batteries as an example. As shown in Figures 1 to 9, the safety protection structure for batteries provided by the embodiment of the present invention includes: a lithium ion battery 1, a casing 2, a mounting hole 3, Mounting hole 3', air inlet 4, exhaust port 5, base 6, positive terminal 7, negative terminal 8, hole 9, positive connecting wire 10, negative connecting wire 11, relay 12, temperature sensor 13, signal wire 14.

Wherein, the lithium-ion battery 1 is cylindrical, and its two ends are respectively a positive electrode and a negative electrode, see FIG. 1 .

The shell 2 is Ω-shaped, hollow inside, with an air inlet 4 and an air outlet 5 on the top, and a mounting hole 3 on the bottom, see attached drawings 2 to 4.

The base 6 is a rectangular flat plate, which is provided with a positive terminal 7, a hole 9 and a negative terminal 8 in sequence. The positive terminal 7 and the negative terminal 8 are relatively arranged on the same axis, and the hole 9 is arranged on one side of the axis. The positive terminal 7 and the negative terminal Lithium-ion battery 1 is set between 8 and fixed on the base 6; the positive connecting wire 10 and the negative connecting wire 11 are respectively connected to the positive terminal 7 and the negative terminal 8, and are derived from the back of the base 6 to be connected to an external circuit; the holes 9 The diameter is about 1.5mm, and the base 6 is provided with a mounting hole 3' matching the shell 2, the diameter of which is about 8mm, and is connected to the shell 2 by bolts, see accompanying drawings 5 to 9.

Relay 12 is fixed on the back side of base 6, is provided with temperature sensor 13 and signal line 14 on it, and temperature sensor 13 passes hole 9 and is fixed on the surface of lithium-ion battery 1, monitors the temperature change of lithium-ion battery 1; When temperature sensor 13 When it is detected that the temperature of the lithium-ion battery 1 reaches the preset dangerous temperature, an instruction is issued through the signal line 14 to discharge an inert gas into the casing 2 to isolate the lithium-ion battery 1; when the temperature of the lithium-ion battery 1 drops and reaches a safe working temperature When required, the temperature sensor 13 sends an instruction through the signal line 14 to extract the inert gas in the casing 2, so that the battery can work normally. In this way, the explosion and combustion of the lithium ion battery 1 can be effectively prevented, thereby achieving the purpose of protecting the lithium ion battery 1 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (8)

1. the safety protection structure for storage battery, described structure comprises: shell (2), base (6) and relay (12); Between the positive terminal (7) of described base (6) and negative terminal (8), lithium ion battery (1) is set, it is characterized in that, described relay (12) comprises temperature sensor (13) and holding wire (14), and described temperature sensor (13) is connected with described lithium ion battery (1); Described positive terminal (7) is connected with negative lead (11) with positive lead (10) respectively with negative terminal (8).

2. the safety protection structure for storage battery as claimed in claim 1, is characterized in that, described shell (2) is the Ω type, and top is provided with air inlet (4) and exhaust outlet (5), and bottom is provided with installing hole (3).

3. the safety protection structure for storage battery as claimed in claim 2, is characterized in that, described base (6) is provided with the installing hole (3 ') be complementary with described installing hole (3).

4. the safety protection structure for storage battery as claimed in claim 3, is characterized in that, described shell (2) is bolted with described base (6).

5. the safety protection structure for storage battery as claimed in claim 1, is characterized in that, described positive lead (10) is connected with external circuit with negative lead (11).

6. the safety protection structure for storage battery as claimed in claim 1, is characterized in that, described lithium ion battery (1) is cylindrical, and its two ends are positive and negative electrode.

7. the safety protection structure for storage battery as claimed in claim 1, it is characterized in that, it is upper that described temperature sensor (13) is fixedly installed on described lithium ion battery (1) by hole (9), and described hole (9) are positioned at a side of the central axis of described positive terminal (7) and negative terminal (8).

8. the safety protection structure for storage battery as claimed in claim 1, is characterized in that, described holding wire (14) is controlled by described temperature sensor (13), sends to the instruction of the interior discharge of described shell (2) inert gas.

Images