Spontaneous combustion prevention battery box

Abstract

The invention relates to an anti-spontaneous combustion battery box which comprises a box body and a cover body, the box body and the cover body jointly define a space used for containing a battery, the battery box further comprises an action assembly, the action assembly is matched with the cover body and used for keeping the cover body open or closing the cover body when the temperature in the box body reaches the set temperature, and the action assembly comprises a telescopic cylinder and a temperature sensing part. The telescopic cylinder is arranged in the box body and is supported on the cover body; and the temperature sensing part is arranged in the box body, is used for measuring the temperature in the box body and is connected with the telescopic cylinder. According to the battery box, the cover body is opened at normal temperature, so that normal heat dissipation of an internal battery is ensured, and normal work of the battery is ensured; and the action assembly is arranged in the battery box, when the temperature in the battery box rises and the battery has the risk of spontaneous combustion, the cover body is automatically closed, and the combustion-supporting substance is isolated, so that combustion is prevented, and the device is simple in overall structure, capable of performing dual protection and good in flame-retardant effect.

Description

Technical Field

[0001] The invention belongs to the technical field of batteries and relates to a battery box, in particular to an anti-spontaneous combustion battery box. Background Art

[0002] At present, electric vehicles can experience high battery temperatures and spontaneous combustion due to overcharging, short circuits, external high temperatures, internal defects, and collisions. Therefore, the most effective way is to effectively prevent the occurrence and spread of fire when abnormal conditions occur in the battery.

[0003] A fireproof battery box is a device specially designed to improve the safety of battery use. It has fireproof and flame-retardant functions. Fireproof battery boxes are usually made of flame-retardant materials and can react quickly when the battery is overheated or short-circuited to prevent the spread of fire. The core principle is to set fireproof and flame-retardant materials inside the battery box. Once the battery is overheated or short-circuited, the fireproof and flame-retardant materials will expand rapidly and wrap the battery to prevent the fire from spreading. In addition, the fireproof battery box can also effectively isolate the heat transfer between the battery and other equipment to prevent the spread of fire.

[0004] However, the battery itself generates heat when it is working, and the temperature will rise after the heat accumulates, causing the risk of spontaneous combustion. Wrapping the battery with flame retardant materials is not conducive to the heat dissipation of the battery. Although there are some other anti-spontaneous combustion battery boxes on the market, they are usually more complicated in structure, and the battery installation is not only troublesome, but also more expensive. Summary of the invention

[0005] The object of the present invention is to provide a battery box that prevents spontaneous combustion.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A self-ignition proof battery box comprises a box body and a cover body, wherein the box body and the cover body together enclose a space for placing batteries, and the battery box further comprises an action component, wherein the action component cooperates with the cover body and is used to keep the cover body open, or to close the cover body when the temperature inside the box body reaches a set temperature, wherein the action component comprises a telescopic cylinder and a temperature sensing component, wherein the telescopic cylinder is disposed inside the box body and supported on the cover body; the temperature sensing component is disposed inside the box body and is used to measure the temperature inside the box body, and the temperature sensing component is connected to the telescopic cylinder.

[0008] Preferably, the above technical solution is that the telescopic cylinder comprises a cylinder body and a push rod, a medium cavity is formed inside the cylinder body, a medium inlet and a first medium outlet connected to the medium cavity are provided on the cylinder body, a control valve is provided at the first medium outlet of the cylinder body, and the control valve is connected to the temperature sensing component; one end of the push rod is slidably disposed in the medium cavity of the cylinder body, and the other end of the push rod extends out of the cylinder body and is supported on the cover body.

[0009] Further preferably, the battery box has a use state and a flame retardant state. In the use state: the push rod lifts the cover body to keep it open; in the flame retardant state: the push rod retracts to close the cover body and seal the box body.

[0010] Further preferably, a plug hole connected to the medium cavity is provided on the cylinder, a plug body is provided at the plug hole, and the melting point of the plug body is higher than the set temperature for closing the cover body, but usually the melting point of the plug body is not higher than the auto-ignition temperature of the battery, the plug hole is opened by melting the plug body, thereby discharging the medium in the medium cavity and retracting the push rod to close the cover body.

[0011] More preferably, the push rod extends from the top of the cylinder, and the bottom of the cylinder is open to form the plug hole.

[0012] Still more preferably, a second medium outlet is also provided at the bottom of the cylinder, and the plug body separates the medium cavity from the second medium outlet. When the plug body melts, the medium cavity is connected to the second medium outlet.

[0013] More preferably, the material of the plug is selected from tin-bismuth alloy, nylon, and tetrafluoroethylene, and plugs with different melting points can be selected according to different batteries.

[0014] Further preferably, an elastic member is provided between the cylinder and the push rod, and the elastic member provides elastic force for the push rod to retract, thereby helping the push rod to retract quickly and close the cover body.

[0015] Further preferably, the action assembly further comprises a pumping component, and the medium inlet of the cylinder is connected to the pumping component.

[0016] More preferably, the pumping component is arranged outside the box body and connected to the medium inlet of the cylinder through a connecting pipe.

[0017] Preferably, in the above technical solution, the action component also includes a controller, which is connected to the temperature sensing component and the telescopic tube, and is used to receive and identify the temperature signal sensed by the temperature sensing component, and when the temperature signal reaches the set temperature, sends a signal to the telescopic tube to close the cover.

[0018] Further preferably, the controller is arranged in the box body.

[0019] Preferably, in the above technical solution, the box body and / or the cover body include an outer shell and an inner lining, the inner lining is arranged on the inner side of the outer shell, the outer shell is a metal material with a melting point of 1450°C to 1650°C, and the inner lining is a flame retardant material, which can not only play a flame retardant role, but also reduce the impact when the battery is subjected to external impact, thereby protecting the safety of the battery.

[0020] Preferably, in the above technical solution, a plurality of temperature sensing components are provided, and the plurality of temperature sensing components are evenly distributed around the box body. In order to prevent a certain temperature sensing component from failing and giving an erroneous temperature signal, a plurality of temperature sensing components are provided for redundant protection.

[0021] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0022] The battery box of the present invention opens its cover at normal temperature to ensure normal heat dissipation of the internal battery and normal operation of the battery. By arranging an action component in the battery box, when the internal temperature of the battery box rises and the battery is at risk of spontaneous combustion, the cover is automatically closed to isolate the combustion-supporting materials, thereby preventing combustion from occurring. The overall structure of the device is simple, dual protection can be performed, and the flame retardant effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a schematic diagram of the appearance of the battery box of the present invention;

[0024] Attached Figure 2 It is a cross-sectional schematic diagram of the battery box of the present invention in a use state;

[0025] Attached Figure 3 It is a cross-sectional schematic diagram of the battery box of the present invention in a flame retardant state;

[0026] Attached Figure 4 It is a cross-sectional schematic diagram of the telescopic cylinder in the present invention.

[0027] In the above attached figure:

[0028] 10. Box body; 11. Cover body; 12. Outer shell; 13. Lining;

[0029] 2. Telescopic cylinder; 20. Cylinder body; 200. Medium cavity; 201. Medium inlet; 202. First medium outlet; 203. Plug hole; 204. Second medium outlet; 21. Push rod; 22. Elastic member; 23. Plug body;

[0030] 3. Temperature sensing components;

[0031] 4. Control valve. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] like Figure 1-3 The illustrated anti-spontaneous combustion battery box includes a box body 10 and a cover body 11, which together enclose a space for placing batteries. In this embodiment: the box body 10 and the cover body 11 include an outer shell 12 and an inner lining 13, and the inner lining 13 is arranged on the inner side of the outer shell 12. Among them: the outer shell 12 can be made of a metal material with a melting point of 1450°C to 1650°C, such as stainless steel; the inner lining 13 can be made of a flame retardant material, such as a thermoplastic flame retardant material, a thermosetting plastic flame retardant material, etc., which can not only play a flame retardant role, but also reduce the impact when the battery is hit by an external impact, thereby protecting the safety of the battery.

[0035] The battery box also includes an action component, which cooperates with the cover 11 to keep the cover 11 open or close the cover 11 when the temperature inside the box 11 reaches a set temperature.

[0036] In this embodiment: the action component includes a telescopic cylinder 2, a temperature sensing component 3, a pumping component (not shown in the figure), and a controller (not shown in the figure). The structure of each component is specifically introduced below.

[0037] like Figure 4As shown: the telescopic cylinder 2 is arranged in the box body 10 and supported on the cover body 11. It is the core component that keeps the cover body 11 open or closes the cover body 11 when the temperature in the box body 11 reaches the set temperature. The telescopic cylinder 2 includes a cylinder 20 and a push rod 21. A medium cavity 200 is formed inside the cylinder 20. A medium inlet 201 and a first medium outlet 202 that are connected to the medium cavity 200 are provided on the cylinder 20. The medium inlet 201 of the cylinder 20 is connected to the pumping component. A control valve 4 is provided at the first medium outlet 202 of the cylinder 20. The control valve 4 can be a solenoid valve. The control valve 4 is connected to the temperature sensing component 3. Specifically, the control valve 4 and the temperature sensing component 3 are connected through a controller. One end of the push rod 21 is slidably disposed in the medium cavity 200 of the cylinder 20, and the other end of the push rod 21 extends out of the cylinder 20 and is supported on the cover body 11, that is, the cover body 11 can be opened by lifting the push rod 21, and the cover body 11 can be closed by retracting the push rod 21, and the medium in the medium cavity 200 serves as a driving medium for driving the push rod 21 to lift and retract.

[0038] In addition, an elastic member 22 , such as a spring, is provided between the cylinder 20 and the push rod 21 . The elastic member 22 provides elastic force for the push rod 21 to retract, thereby helping the push rod 21 to retract quickly and close the cover 11 .

[0039] In a preferred implementation of this embodiment: a plug hole 203 connected to the medium cavity 200 is provided on the cylinder 20, and a plug body 23 is provided at the plug hole 203, and the melting point of the plug body 23 is higher than the set temperature for closing the cover body 11, but usually the melting point of the plug body 23 is not higher than the self-ignition temperature of the battery, so as to avoid the battery having self-ignited while the plug body 23 has not yet reached the melting temperature. In this way, the plug hole 203 can be opened by the melting of the plug body 23, so that the medium in the medium cavity 200 is discharged and the top rod 21 is retracted to close the cover body 11. The material of the plug body 23 can be selected from tin-bismuth alloy, nylon, tetrafluoroethylene, etc., and the plug body 23 with different melting points can be selected according to different batteries.

[0040] In this embodiment, the top rod 21 extends from the top of the cylinder 20, and the bottom of the cylinder 20 is open to form a plug hole 203. Correspondingly, a second medium outlet 204 is also opened at the bottom of the cylinder 20, and the plug 23 can separate the medium cavity 200 from the second medium outlet 204. When the plug 23 melts, the medium cavity 200 can be connected to the second medium outlet 204.

[0041] The temperature sensing component 3 is arranged in the box body 10, and is used to measure the temperature in the box body 10. In this embodiment, a plurality of temperature sensing components 3 are arranged, and the plurality of temperature sensing components 3 are evenly distributed around the box body 10. In order to prevent a certain temperature sensing component 3 from failing and giving an erroneous temperature signal, a plurality of temperature sensing components 3 are arranged for redundant protection.

[0042] The pumping component is arranged outside the box body 10 and connected to the medium inlet 201 of the cylinder body 20 through a connecting pipe. In this embodiment, the medium is a gas, such as an inert gas, which is flame retardant. Of course, other liquid media can also be used.

[0043] The controller is connected to the temperature sensing component 3 and the telescopic tube 2, and is used to receive the temperature signal sensed by the temperature sensing component 3 and make a judgment. When the temperature signal reaches the set temperature, it sends a signal to the telescopic tube 2 to close the cover 11. The controller is also arranged in the box body 10.

[0044] The working process of this embodiment is described in detail below:

[0045] When the temperature in the box body 10 is normal, the pumping component pumps the medium into the medium cavity 200 through the medium inlet 201 of the barrel 20, so that the medium cavity 200 is filled with the medium and the push rod 21 is lifted, thereby opening the cover 11 and keeping it in the open state to ensure the heat dissipation of the battery in the box body 10. Figure 2 As shown; the temperature sensing component 3 senses the temperature inside the box body 10 in real time; when the temperature inside the box body 10 rises and the sensing temperature sent by the temperature sensing component 3 reaches the set temperature, the controller sends an instruction to close the cover body 11 to the control valve 4, and the control valve 4 opens the first medium outlet 202 of the cylinder 20, and the medium in the medium cavity 200 is discharged through the first medium outlet 202, and the top rod 21 retracts under the elastic force of the elastic member 22, and the cover body 11 loses support and closes, isolating the flame retardant (air), and the entire battery box is in a sealed state. At the same time, because there is less air in the battery box, it is not conducive to the further development of combustion. At the same time, the protection of the stainless steel shell 12 and the additional flame retardant plastic lining 13 can effectively block the development of combustion, thereby playing a protective role against spontaneous combustion, such as Figure 3 shown.

[0046] When one of the temperature sensing component 3 and the control valve 4 fails or malfunctions, the temperature in the box body 10 continues to rise. Under the action of high temperature, the plug body 23 melts, so that the medium cavity 200 is connected with the second medium outlet 204, and the medium in the medium cavity 200 is discharged through the second medium outlet 204. The push rod 21 retracts under the elastic force of the elastic member 22, and the cover body 11 loses support and closes, thereby sealing the box body 10.

[0047] In order to ensure the reliability of the telescopic tube 2, the action component of the present application is designed with a dual working protection logic. The first protection logic is controlled by the temperature sensing component 3 and the control valve 4. If the temperature sensing component 3 and the control valve 4 fail, the second protection of the plug body 23 is activated. Through the dual protection of digitization and mechanization, the telescopic tube 2 can be ensured to work reliably at the set temperature, thereby providing a guarantee for the battery box to be quickly closed in an emergency.

[0048] After eliminating the risk of battery spontaneous combustion, the control valve 4 can be closed, and the medium can be pumped into the medium cavity 200 of the cylinder 20 through the pumping component again, so that the medium cavity 200 is filled with the medium and the push rod 21 is lifted, thereby opening the cover 11.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-ignition-proof battery box, comprising a box body and a cover body, wherein the box body and the cover body together enclose a space for placing batteries, characterized in that: The battery box also includes an action component, which cooperates with the cover body and is used to keep the cover body open or close the cover body when the temperature inside the box body reaches a set temperature. The action component includes a telescopic tube and a temperature sensing component. The telescopic tube is arranged in the box body and supported on the cover body; the temperature sensing component is arranged in the box body and is used to measure the temperature inside the box body. The temperature sensing component is connected to the telescopic tube.

2. The anti-spontaneous combustion battery box according to claim 1, characterized in that: The telescopic cylinder includes a cylinder body and a push rod. A medium cavity is formed inside the cylinder body. A medium inlet and a first medium outlet connected to the medium cavity are provided on the cylinder body. A control valve is provided at the first medium outlet of the cylinder body, and the control valve is connected to the temperature sensing component. One end of the push rod is slidably arranged in the medium cavity of the cylinder body, and the other end of the push rod extends out of the cylinder body and is supported on the cover body.

3. The anti-spontaneous combustion battery box according to claim 2, characterized in that: The battery box has a use state and a flame retardant state. In the use state, the push rod lifts the cover body to keep it open; in the flame retardant state, the push rod retracts to close the cover body and seal the box body.

4. The anti-spontaneous combustion battery box according to claim 2, characterized in that: The cylinder is provided with a plug hole connected with the medium cavity, a plug body is arranged at the plug hole, and the melting point of the plug body is higher than the set temperature for closing the cover body.

5. The anti-spontaneous combustion battery box according to claim 4, characterized in that: The ejector rod extends from the top of the cylinder, and the bottom of the cylinder is open to form the plug hole; The bottom of the cylinder is also provided with a second medium outlet, and the plug body separates the medium cavity from the second medium outlet. When the plug body melts, the medium cavity is connected to the second medium outlet.

6. The anti-spontaneous combustion battery box according to claim 2, characterized in that: An elastic member is arranged between the cylinder and the push rod, and the elastic member provides elastic force for the push rod to retract.

7. The anti-spontaneous combustion battery box according to claim 2, characterized in that: The action assembly further comprises a pumping component, and the medium inlet of the cylinder is connected to the pumping component; The pumping component is arranged outside the box body and connected to the medium inlet of the cylinder through a connecting pipe.

8. The anti-spontaneous combustion battery box according to claim 1, characterized in that: The action assembly further includes a controller, which is connected to the temperature sensing component and the telescopic tube, and is used to receive and judge the temperature signal sensed by the temperature sensing component, and send a signal to the telescopic tube to close the cover when the temperature signal reaches the set temperature; The controller is arranged in the box body.

9. The anti-spontaneous combustion battery box according to claim 1, characterized in that: The box body and / or the cover body include an outer shell and an inner lining, wherein the inner lining is arranged on the inner side of the outer shell, the outer shell is a metal material with a melting point of 1450°C to 1650°C, and the inner lining is a flame retardant material.

10. The anti-spontaneous combustion battery box according to claim 1, characterized in that: There are multiple temperature sensing components, and the multiple temperature sensing components are evenly distributed around the box body.

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