CN114665213B - Lithium battery high temperature protection structure - Google Patents

Abstract

The invention relates to the technical field of lithium batteries and discloses a lithium battery and a lithium battery high-temperature protection structure, which comprises a protection mechanism, wherein the lithium battery mechanism is arranged on the inner side of the protection mechanism, the protection mechanism comprises a protection frame and a protection outer cover, the protection frame comprises a protection frame body and a protection sleeve, a plurality of heat dissipation grooves are formed in the middle of the protection frame body, and a group of first positioning buckles are arranged on the front side and the rear side of the protection frame body. According to the invention, when the temperature sensor senses that the external temperature reaches the specified temperature, the temperature sensor transmits information to the singlechip, the singlechip works to drive the electric telescopic rod to work, the electric telescopic rod can drive the second positioning buckle to move by the electric telescopic rod, the second positioning buckle moves to drive the protective sleeve to move, and when the protective sleeve moves to cover the heat dissipation groove, the lithium battery mechanism is hidden at the inner side of the protective frame, so that the situation that the lithium battery mechanism at the inner side of the protective frame is damaged due to the increase of the external temperature is avoided.

Description

A lithium battery high temperature protection structure

technical field

The invention relates to the technical field of lithium batteries, in particular to a high temperature protection structure for lithium batteries.

Background technique

Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the advantages of small size, light weight, high energy and high power, low self-discharge rate, environmental protection and long service life, lithium batteries have gradually become the mainstream of power batteries. With the rapid development of the new energy vehicle market, lithium batteries have been widely used, and their safety issues have become increasingly prominent. Fire accidents of new energy vehicles have occurred from time to time, and their safety has become the focus of social attention. Most of the fires of new energy vehicles are caused by the thermal runaway of lithium batteries. The thermal runaway of lithium batteries causes fires, and thermal expansion causes fires in the entire battery system and the entire vehicle. Therefore, the requirements for the safety performance of lithium-ion power batteries have become more stringent. Once the thermal runaway of the lithium battery of the existing new energy vehicle occurs, the temperature of the main body of the battery will rise abnormally, and there is a risk of thermal runaway and fire.

However, it is often difficult for lithium batteries to effectively extinguish the fire after a fire occurs, and a burning lithium battery will quickly ignite nearby flammable objects, causing huge losses. Therefore, those skilled in the art provide a lithium battery high temperature protection structure to solve the problems raised in the above background technology.

Contents of the invention

The purpose of the present invention is to provide a lithium battery high temperature protection structure to solve the problems raised in the above background technology.

To achieve the above object, the present invention provides the following technical solutions:

A lithium battery high temperature protection structure, including a protection mechanism, a lithium battery mechanism is provided inside the protection mechanism, the protection mechanism includes a protection frame and a protection outer cover, the protection frame includes a protection frame body and a protection cover, the There are several cooling grooves in the middle of the protective frame body, a group of first positioning buckles are arranged on the front and rear sides of the protective frame body, and a guide rod is arranged in the middle of a group of the first positioning buckles. Both sides are provided with a second positioning buckle, the middle of the second positioning buckle is provided with a connecting rod, one side of the second positioning buckle is provided with an electric telescopic rod, and the protective outer cover includes a protective outer cover body, a A power supply connection line and a temperature sensor are set. Both sides of the protective outer cover body are provided with a third positioning buckle. One end of the power supply connection line is provided with a metal conductive sheet, and a limit ring is provided in the middle of the metal conductive sheet.

As a further solution of the present invention: the protective frame body is fixedly connected to the first positioning buckle, and the first positioning buckle is fixedly connected to the guide rod.

As a further solution of the present invention: the protective cover is fixedly connected to the second positioning buckle, and the second positioning buckle is fixedly connected to the connecting rod.

As a further solution of the present invention: one end of the electric telescopic rod is fixedly connected to the second positioning buckle, and the other end of the electric telescopic rod is fixedly connected to the first positioning buckle.

As a further solution of the present invention: the second positioning buckle is slidably connected to the guide rod, and the protective cover is matched with the heat dissipation groove.

As a further solution of the present invention: the protective outer cover body is fixedly connected to the third positioning buckle, the temperature sensor is fixedly connected to the protective outer cover body, the power supply connection line is fixedly connected to the metal conductive sheet, and the position limiting The ring is rotatably connected to the metal conductive sheet, and the metal conductive sheet is snap-fit connected to the main body of the protective outer cover.

As a further solution of the present invention: the lithium battery mechanism includes a lithium battery casing, a rubber pad and a single-chip microcomputer, several lithium battery bodies are arranged on the inside of the lithium battery casing, and a power supply positive electrode is arranged on one side of the lithium battery casing. Negative electrode, the upper side of the lithium battery case is provided with a lithium battery case cover, one side of the lithium battery case cover is provided with a first positioning piece, and the lower end of the other side of the lithium battery case cover is provided with a As for the positioning baffle, one side of the rubber pad is provided with several second positioning pieces, and one side of the single-chip microcomputer is provided with a spring inside the rubber pad.

As a further solution of the present invention: the lithium battery casing is snap-fit connected with the lithium battery body, and the lithium battery casing is fixedly connected with the positive and negative electrodes of the power supply.

As a further solution of the present invention: the lithium battery case cover is fixedly connected to the first positioning piece, the lithium battery case cover is fixedly connected to the positioning baffle, and the lithium battery case cover matches the lithium battery case .

As a further solution of the present invention: the rubber pad is fixedly connected to the second positioning piece, the rubber pad is snap-fit connected to the lithium battery case, one end of the spring is fixedly connected to the single-chip microcomputer, and the other end of the spring is connected to the rubber Pad fixed connection.

Compared with prior art, the beneficial effect of the present invention:

1. When the temperature sensor senses that the external temperature reaches the specified temperature, the temperature sensor transmits information to the single-chip microcomputer. The operation of the single-chip microcomputer drives the electric telescopic rod to work. The electric telescopic rod works to make the electric telescopic rod push the second positioning buckle to move, and the second positioning buckle to move Drive the protective cover to move, and connect and fix multiple protective covers through the connecting rod. When the protective cover moves to cover the heat sink, the lithium battery mechanism is hidden inside the protective frame, thereby avoiding the lithium battery inside the protective frame. When the mechanism is damaged due to the rise of external temperature, when the temperature sensor senses that the external temperature is lower than the specified temperature, the temperature sensor transmits information to the single-chip microcomputer, and the operation of the single-chip microcomputer drives the electric telescopic rod to work, and the operation of the electric telescopic rod can make the electric telescopic rod Push the second positioning buckle back, and the movement of the second positioning buckle drives the protective cover to move. When the protective cover moves and the heat sink leaks out, the lithium battery mechanism can dissipate heat through the heat sink, thereby preventing the lithium battery mechanism inside the protective frame from being damaged by its own temperature. If the height is inconvenient to dissipate heat, the service life of the lithium battery mechanism is improved. The screw penetrates through the third positioning buckle and is fixed on the first positioning buckle, so that the protective outer cover body can be fixed on the protective frame body. Through the second positioning The buckle is embedded on the body of the protective cover, and the limit ring is used to fix it on the metal conductive sheet so that the positive and negative poles of the power supply can be connected through the lengthening of the power supply cable, which is convenient for use.

2. Through the lithium battery case, it can protect several lithium battery bodies. Through the positive and negative electrodes of the power supply, it can facilitate the centralized export of the power of several lithium battery bodies. The first positioning piece is inserted into the lithium battery case, and then used The screw goes through the positioning baffle and is fixed on the lithium battery casing, so that the lithium battery casing cover plate and the lithium battery casing can jointly fix several lithium battery bodies on the inside, and the positive and negative poles of the lithium battery casing can be fixed by the rubber pad. To play a protective role, the rubber pad can be fixed on the protective frame body by embedding the second positioning piece on the protective frame body, and the single-chip microcomputer can be fixed on the inner side of the rubber pad by the spring.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

The structures, proportions, sizes, etc. shown in this manual are only used to cooperate with the content disclosed in the manual, so that people familiar with this technology can understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no technical In the substantive meaning above, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered.

Fig. 1 is a structural schematic diagram of a lithium battery high temperature protection structure;

Fig. 2 is a schematic diagram of a decomposition structure of a lithium battery high temperature protection structure;

3 is a structural schematic diagram of a protection mechanism in a lithium battery high temperature protection structure;

Fig. 4 is a structural schematic diagram of a protective frame in a lithium battery high temperature protective structure;

Fig. 5 is a structural schematic diagram of a protective outer cover in a lithium battery high temperature protection structure;

FIG. 6 is a schematic structural diagram of a lithium battery mechanism in a lithium battery high temperature protection structure.

Among the figure: 1, protective mechanism; 11, protective frame; 111, protective frame body; 1111, cooling groove; 1112, first positioning buckle; 1113, guide rod; 112, protective cover; Connecting rod; 1123, electric telescopic rod; 12, protective outer cover; 121, protective outer cover body; 1211, third positioning buckle; 122, power connection line; 1221, metal conductive sheet; 1222, limit ring; 123, temperature 2. Lithium battery mechanism; 21. Lithium battery shell; 211. Lithium battery body; 212. Positive and negative poles of power supply; 213. Lithium battery shell cover; 214. First positioning piece; 215. Positioning baffle; 22. Rubber pad; 221, the second positioning piece; 23, single-chip microcomputer; 231, spring.

Detailed ways

The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1 to 6. In an embodiment of the present invention, a lithium battery high temperature protection structure includes a protection mechanism 1. A lithium battery mechanism 2 is arranged inside the protection mechanism 1. The protection mechanism 1 includes a protection frame 11 and a protection outer cover 12. , the protective frame 11 includes a protective frame body 111 and a protective cover 112, several cooling grooves 1111 are provided in the middle of the protective frame body 111, a group of first positioning buckles 1112 are arranged on the front and rear sides of the protective frame body 111, a group of first The middle of the positioning buckle 1112 is provided with a guide rod 1113, both sides of the protective cover 112 are provided with a second positioning buckle 1121, the middle of the second positioning buckle 1121 is provided with a connecting rod 1122, and one side of the second positioning buckle 1121 is provided with an electric motor. Telescoping rod 1123, protective outer cover 12 comprises protective outer cover body 121, a group of power connecting wires 122 and temperature sensor 123, the both sides of protective outer cover body 121 are all provided with the 3rd positioning buckle 1211, one end of power connecting wire 122 is provided with There is a metal conductive sheet 1221 , and a limiting ring 1222 is arranged in the middle of the metal conductive sheet 1221 .

In Figures 1, 2, 3, 4 and 5: the protective frame body 111 is fixedly connected to the first positioning buckle 1112, the first positioning buckle 1112 is fixedly connected to the guide rod 1113, the protective sleeve 112 is fixedly connected to the second positioning buckle 1121, The second positioning buckle 1121 is fixedly connected with the connecting rod 1122, and one end of the electric telescopic rod 1123 is fixedly connected with the second positioning buckle 1121, and the other end of the electric telescopic rod 1123 is fixedly connected with the first positioning buckle 1112, and the second positioning buckle 1121 is connected with the guide The rod 1113 is slidingly connected, the protective cover 112 is matched with the cooling groove 1111, the protective outer cover body 121 is fixedly connected with the third positioning buckle 1211, the temperature sensor 123 is fixedly connected with the protective outer cover body 121, the power connection line 122 and the metal conductive sheet 1221 Fixed connection, the limit ring 1222 and the metal conductive sheet 1221 are rotationally connected, and the metal conductive sheet 1221 and the protective outer cover body 121 are snap-fit connected. When the temperature sensor 123 senses that the external temperature reaches a specified temperature, the temperature sensor 123 transmits information to the single-chip microcomputer 23 , the single-chip microcomputer 23 works to drive the electric telescopic rod 1123 to work, and the electric telescopic rod 1123 works to make the electric telescopic rod 1123 push the second positioning buckle 1121 to move, and the second positioning buckle 1121 moves to drive the protective cover 112 to move, and the connecting rod 1122 can be used for multiple The protective cover 112 plays the role of connection and fixation. When the protective cover 112 moves to cover the cooling groove 1111, the lithium battery mechanism 2 is hidden inside the protective frame 11, thereby preventing the lithium battery mechanism 2 inside the protective frame 11 from being affected by the external temperature. In the case of damage caused by rising, when the temperature sensor 123 senses that the external temperature is lower than the specified temperature, the temperature sensor 123 transmits information to the single-chip microcomputer 23, and the operation of the single-chip microcomputer 23 drives the electric telescopic rod 1123 to work, and the electric telescopic rod 1123 works to make the electric telescopic rod 1123 work. The rod 1123 pushes the second positioning buckle 1121 back, and the movement of the second positioning buckle 1121 drives the protective cover 112 to move. When the protective cover 112 moves and the heat dissipation groove 1111 leaks out, the lithium battery mechanism 2 can dissipate heat through the heat dissipation groove 1111, thereby avoiding protection. The lithium battery mechanism 2 on the inner side of the frame 11 is inconvenient to dissipate heat because of its own temperature rise, so as to improve the service life of the lithium battery mechanism 2, and fix it on the first positioning buckle 1112 after passing through the third positioning buckle 1211 through the screw rod, which can make the protection The outer cover body 121 is fixed on the protective frame body 111, and is embedded in the protective outer cover body 121 through the second positioning buckle 1121, and fixed on the metal conductive sheet 1221 by using the limit ring 1222 so that the positive and negative poles 212 of the power supply can pass through the power supply. The connection line 122 is lengthened for easy use.

In Fig. 1, 2 and 6: lithium battery mechanism 2 comprises lithium battery shell 21, rubber pad 22 and single-chip microcomputer 23, the inner side of lithium battery shell 21 is provided with several lithium battery bodies 211, and one side of lithium battery shell 21 is provided with The positive and negative poles 212 of the power supply, the upper side of the lithium battery case 21 are provided with a lithium battery case cover 213, one side of the lithium battery case cover 213 is provided with a first positioning piece 214, and the lower end of the other side of the lithium battery case cover 213 is A positioning baffle 215 is provided, one side of the rubber pad 22 is provided with several second positioning pieces 221, one side of the single chip microcomputer 23 is located inside the rubber pad 22 and a spring 231 is provided, and the lithium battery case 21 and the lithium battery body 211 are snapped into place. Connection, the lithium battery casing 21 is fixedly connected to the positive and negative poles 212 of the power supply, the lithium battery casing cover 213 is fixedly connected to the first positioning piece 214, the lithium battery casing cover 213 is fixedly connected to the positioning baffle 215, and the lithium battery casing cover 213 Matching with the lithium battery casing 21, the rubber pad 22 is fixedly connected with the second positioning piece 221, the rubber pad 22 is snap-fit connected with the lithium battery casing 21, one end of the spring 231 is fixedly connected with the microcontroller 23, and the other end of the spring 231 is connected with the rubber pad 22 is fixedly connected, through the lithium battery shell 21 can play a protective role for several lithium battery bodies 211, through the positive and negative electrodes 212 of the power supply can facilitate the centralized export of the power of several lithium battery bodies 211, through the first positioning piece 214 card embedded in On the lithium battery casing 21, screw rods are used to pass through the positioning baffle plate 215 and then fixed on the lithium battery casing 21, so that the lithium battery casing cover plate 213 and the lithium battery casing 21 can jointly fix several lithium battery bodies 211 on the inside. The rubber pad 22 can protect the positive and negative poles 212 of the lithium battery case 21. The rubber pad 22 can be fixed on the protective frame body 111 by the second positioning piece 221 embedded in the protective frame body 111. The spring 231 The single chip microcomputer 23 can be fixed on the inner side of the rubber pad 22 .

Working principle of the present invention: when the temperature sensor 123 senses that the external temperature reaches the specified temperature, the temperature sensor 123 transmits information to the single-chip microcomputer 23, and the operation of the single-chip microcomputer 23 drives the electric telescopic rod 1123 to work, and the work of the electric telescopic rod 1123 can make the electric telescopic rod 1123 push The second positioning buckle 1121 moves, and the movement of the second positioning buckle 1121 drives the protective cover 112 to move. Through the connecting rod 1122, a plurality of protective covers 112 can be connected and fixed. When the protective cover 112 moves to cover the cooling groove 1111, lithium The battery mechanism 2 is hidden in the inner side of the protective frame 11, thereby avoiding the situation that the lithium battery mechanism 2 inside the protective frame 11 is damaged due to the increase of the external temperature. When the temperature sensor 123 senses that the external temperature is lower than the specified temperature, the temperature The sensor 123 transmits information to the single-chip microcomputer 23, and the operation of the single-chip microcomputer 23 drives the electric telescopic rod 1123 to work, and the electric telescopic rod 1123 works to make the electric telescopic rod 1123 push the second positioning buckle 1121 back, and the second positioning buckle 1121 moves to drive the protective cover 112 to move, When the protective cover 112 moves and the heat dissipation groove 1111 leaks out, the lithium battery mechanism 2 can dissipate heat through the heat dissipation groove 1111, thereby avoiding the situation that the lithium battery mechanism 2 inside the protective frame 11 is inconvenient to dissipate heat because of an increase in its own temperature, and improves the performance of the lithium battery. The service life of mechanism 2 is fixed on the first positioning buckle 1112 after passing through the third positioning buckle 1211 by the screw rod, so that the protective outer cover body 121 can be fixed on the protective frame body 111, and can be embedded in the protective outer cover by the second positioning buckle 1121. On the cover body 121, use the limit ring 1222 to fix it on the metal conductive sheet 1221, so that the positive and negative electrodes 212 of the power supply can be connected through the lengthening of the power supply connection line 122, so as to be convenient to use, and several lithium battery bodies 211 can be connected through the lithium battery shell 21 Play a protective role, through the positive and negative poles 212 of the power supply, the power of several lithium battery bodies 211 can be conveniently exported, and the first positioning piece 214 is inserted into the lithium battery shell 21, and then the screw is used to penetrate the positioning baffle 215 and then fixed on it. lithium battery casing 21, so that the lithium battery casing cover plate 213 and the lithium battery casing 21 can jointly fix several lithium battery bodies 211 inside, and the positive and negative electrodes 212 of the lithium battery casing 21 can be lifted from the rubber pad 22. For protection, the rubber pad 22 can be fixed on the protective frame body 111 through the second positioning piece 221 embedded in the protective frame body 111 , and the single-chip microcomputer 23 can be fixed on the inner side of the rubber pad 22 through the spring 231 .

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technology of the present invention Any equivalent replacement or change of the scheme and its inventive concepts shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a lithium cell high temperature protection structure, includes protection machanism (1), its characterized in that, the inboard of protection machanism (1) is provided with lithium cell mechanism (2), protection machanism (1) are including protection frame (11) and protection enclosing cover (12), protection frame (11) are including protection frame body (111) and lag (112), a plurality of heat sink (1111) have been seted up in the centre of protection frame body (111), both sides all are provided with a set of first location knot (1112) around protection frame body (111), a set of the centre of first location knot (1112) is provided with guide bar (1113), the both sides of lag (112) all are provided with second location knot (1121), the centre of second location knot (1121) is provided with connecting rod (1122), one side of second location knot (1121) is provided with electric telescopic rod (1123), protection enclosing cover (12) are including protection enclosing cover body (121), a set of power connecting wire (122) and temperature sensor body (123), the centre of protection connecting wire (121) is provided with metal sheet (122), both sides (122) are provided with electric current-conducting ring (122) and are provided with the centre piece (1221) of electric current-conducting ring (122);

lithium cell mechanism (2) include lithium cell shell (21), rubber pad (22) and singlechip (23), when temperature sensor (123) sensed outside temperature and reached appointed temperature, temperature sensor (123) transfer information to singlechip (23), singlechip (23) work drive electric telescopic handle (1123) work, electric telescopic handle (1123) work makes electric telescopic handle (1123) promote second location knot (1121) and removes, second location knot (1121) remove and drive lag (112) and remove, play the fixed action through connecting rod (1122) to a plurality of lag (112), when lag (112) remove and cover heat sink (1111), lithium cell mechanism (2) are hidden in the inboard of protection frame (11), thereby avoid protection frame (11) inboard lithium cell mechanism (2) to cause the condition of damage because of outside temperature's rising.

2. The lithium battery high-temperature protection structure according to claim 1, wherein the protection frame body (111) is fixedly connected with the first positioning buckle (1112), and the first positioning buckle (1112) is fixedly connected with the guide rod (1113).

3. The lithium battery high-temperature protection structure according to claim 1, wherein the protecting sleeve (112) is fixedly connected with the second positioning buckle (1121), and the second positioning buckle (1121) is fixedly connected with the connecting rod (1122).

4. The lithium battery high-temperature protection structure according to claim 1, wherein one end of the electric telescopic rod (1123) is fixedly connected with the second positioning buckle (1121), and the other end of the electric telescopic rod (1123) is fixedly connected with the first positioning buckle (1112).

5. The lithium battery high-temperature protection structure according to claim 1, wherein the second positioning buckle (1121) is slidably connected to the guide rod (1113), and the protection sleeve (112) is matched with the heat dissipation groove (1111).

6. The lithium battery high-temperature protection structure according to claim 1, wherein the protection outer cover body (121) is fixedly connected with the third positioning buckle (1211), the temperature sensor (123) is fixedly connected with the protection outer cover body (121), the power supply connecting wire (122) is fixedly connected with the metal conducting plate (1221), the limiting ring (1222) is rotatably connected with the metal conducting plate (1221), and the metal conducting plate (1221) is in embedded connection with the protection outer cover body (121).

7. The lithium battery high-temperature protection structure according to claim 1, wherein a plurality of lithium battery bodies (211) are arranged on the inner side of the lithium battery shell (21), a power anode and a power cathode (212) are arranged on one side of the lithium battery shell (21), a lithium battery shell cover plate (213) is arranged on the upper side of the lithium battery shell (21), a first positioning plate (214) is arranged on one side of the lithium battery shell cover plate (213), a positioning baffle (215) is arranged at the lower end of the other side of the lithium battery shell cover plate (213), a plurality of second positioning plates (221) are arranged on one side of the rubber pad (22), and a spring (231) is arranged on the inner side of the rubber pad (22) on one side of the single chip microcomputer (23).

8. The lithium battery high-temperature protection structure according to claim 7, wherein the lithium battery shell (21) is in embedded connection with the lithium battery body (211), and the lithium battery shell (21) is fixedly connected with the positive electrode and the negative electrode (212) of the power supply.

9. The lithium battery high-temperature protection structure according to claim 7, wherein the lithium battery shell cover plate (213) is fixedly connected with the first positioning piece (214), the lithium battery shell cover plate (213) is fixedly connected with the positioning baffle plate (215), and the lithium battery shell cover plate (213) is matched with the lithium battery shell (21).

10. The lithium battery high-temperature protection structure according to claim 7, wherein the rubber pad (22) is fixedly connected with the second positioning piece (221), the rubber pad (22) is in embedded connection with the lithium battery shell (21), one end of the spring (231) is fixedly connected with the single chip microcomputer (23), and the other end of the spring (231) is fixedly connected with the rubber pad (22).

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