A housing with a lithium battery overheat protection mechanism

Abstract

This utility model discloses a housing with a lithium battery overheat protection mechanism, relating to the field of lithium battery technology. It includes a housing with openings on both sides, inside which a lithium battery is fixed; a cooling fan installed at the openings on both sides of the housing; a heat-conducting column installed on one side of the lithium battery, with a cavity containing a thermally expanding liquid; a connecting groove whose bottom is connected to the top of the heat-conducting column, containing a membrane; and a switch fixedly installed on the connecting groove, located on the side of the membrane away from the heat-conducting column, containing a built-in chip, and electrically connected to the cooling fan. This utility model controls fan cooling through the structure of the thermally expanding liquid and the membrane, effectively and promptly adjusting the cooling state according to the lithium battery temperature to prevent overheating.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a housing with a lithium battery overheat protection mechanism. Background Technology

[0002] In an era of widespread lithium battery applications, their safety has always been a major concern in the industry. Lithium batteries are prone to thermal runaway under conditions such as overcharging, short circuits, high temperatures, or mechanical damage, leading to a rapid rise in temperature and even causing fires or explosions. Especially in high-energy-density battery packs, localized overheating can spread rapidly, causing serious consequences. Therefore, a housing with a lithium battery overheat protection mechanism is proposed. Utility Model Content

[0003] The main purpose of this invention is to provide a housing with a lithium battery overheat protection mechanism. By using the structure of thermally expanding liquid and membrane, the fan can be controlled to dissipate heat, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides a housing with a lithium battery overheat protection mechanism, including a housing, a cooling fan, a heat-conducting column, a connecting groove, and a switch;

[0005] The box has openings on both sides, and a lithium battery is fixed inside the box;

[0006] The cooling fans are installed at the openings on both sides of the housing;

[0007] The heat-conducting column is installed on one side of the lithium battery, and the heat-conducting column has a cavity, which contains a thermally expanding liquid.

[0008] The bottom of the connecting groove is connected to the top of the heat-conducting column, and a membrane is provided inside the connecting groove;

[0009] The switch is fixedly installed on the connecting groove. The switch is located on the side of the membrane away from the heat-conducting column. The switch has a built-in chip and is electrically connected to the cooling fan.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, multiple heat-conducting pillars are provided, and the multiple heat-conducting pillars are attached to one side of multiple lithium batteries along the direction of gravity. The connecting groove is horizontally arranged and is used to connect the multiple heat-conducting pillars.

[0012] Furthermore, the membrane is horizontally arranged, and the membrane, the inner wall of the connecting groove, and the inner walls of multiple heat-conducting columns together form a sealed space.

[0013] Furthermore, the membrane and the switch are spaced apart.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a housing with a lithium battery overheat protection mechanism, which has the following advantages:

[0015] 1. This utility model controls fan heat dissipation through the structure of thermally expanding liquid and membrane, which can effectively and timely adjust the heat dissipation state according to the lithium battery temperature to avoid overheating of the lithium battery.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a housing with a lithium battery overheat protection mechanism proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the heat-conducting column and the connecting groove in the housing with a lithium battery overheat protection mechanism proposed in this utility model.

[0020] In the diagram: 1. Housing; 2. Lithium battery; 3. Cooling fan; 4. Heat-conducting column; 5. Cavity; 6. Thermally expanding liquid; 7. Connecting groove; 8. Membrane; 9. Switch. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-2 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1-2 As shown, this utility model provides a housing with a lithium battery overheat protection mechanism, including a housing 1, a cooling fan 3, a heat-conducting column 4, a connecting groove 7, and a switch 9;

[0025] The two sides of the box 1 are open, and a lithium battery 2 is fixed inside the box 1;

[0026] The cooling fan 3 is installed at the openings on both sides of the housing 1. When the cooling fan 3 is working, it dissipates heat from the lithium battery pack 2.

[0027] The heat-conducting column 4 is installed on one side of the lithium battery 2. The heat-conducting column 4 has a cavity 5 inside, and the cavity 5 contains a thermally expanding liquid 6. There are multiple heat-conducting columns 4, and the multiple heat-conducting columns 4 are attached to one side of multiple lithium batteries 2 along the direction of gravity.

[0028] The bottom of the connecting groove 7 is connected to the top of the heat-conducting column 4. A membrane 8 is provided inside the connecting groove 7. The connecting groove 7 is horizontally arranged. The connecting groove 7 is used to connect multiple heat-conducting columns 4. The membrane 8 is horizontally arranged. The membrane 8, the inner wall of the connecting groove 7 and the inner walls of multiple heat-conducting columns 4 together form a sealed space.

[0029] When the lithium battery 2 overheats, the thermally expanding liquid 6 in the heat-conducting column 4 expands due to heat, and the gas in the sealed space formed by the multiple cavities 5 and the connecting groove 7 is compressed, thereby pushing the membrane 8 to bulge towards the side away from the heat-conducting column 4. When the temperature of the lithium battery 2 reaches the set value, the membrane 8 resists the switch 9.

[0030] The switch 9 is fixedly installed on the connecting groove 7. The switch 9 is located on the side of the membrane 8 away from the heat-conducting column 4. The switch 9 has a built-in chip and is electrically connected to the cooling fan 3. When the membrane 8 resists the switch 9, the switch 9 issues a heat dissipation command, and the cooling fan 3 rotates to dissipate heat from the lithium battery pack 2.

[0031] The working principle is as follows:

[0032] When the temperature of lithium battery 2 rises abnormally, heat is transferred to the heat-conducting column 4 through the contact surface. The cavity 5 inside the heat-conducting column is filled with thermally expanding liquid 6, which expands in volume when heated. Since multiple heat-conducting columns form a closed space through the connecting groove 7, the thermally expanding liquid 6 pushes the gas to gather in the connecting groove 7. The gas pressure causes the horizontal membrane 8 to bulge upward. When the temperature reaches the set threshold, the deformation of the membrane 8 is sufficient to press against the switch 9. The built-in chip of the switch 9 detects the trigger signal and immediately starts the cooling fan 3 to force convection cooling. The fan 3 continues to run until the temperature of lithium battery 2 drops, the thermally expanding liquid 6 contracts, the membrane 8 resets, and the switch 9 disconnects.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A case with a lithium battery overheat protection mechanism, characterized by, include: The box (1) has openings on both sides, and a lithium battery (2) is fixed inside the box (1). Cooling fan (3), the cooling fan (3) is installed at the openings on both sides of the housing (1); A heat-conducting column (4) is installed on one side of the lithium battery (2). A cavity (5) is provided inside the heat-conducting column (4), and a thermally expanding liquid (6) is provided inside the cavity (5). A connecting groove (7) is provided, the bottom of which is connected to the top of the heat-conducting column (4), and a membrane (8) is provided inside the connecting groove (7). A switch (9) is fixedly installed on the connecting groove (7). The switch (9) is located on the side of the membrane (8) away from the heat-conducting column (4). The switch (9) has a built-in chip and is electrically connected to the cooling fan (3).

2. A case with a lithium battery overheat protection mechanism according to claim 1, characterized in that, The heat-conducting pillars (4) are provided in multiple ways. The multiple heat-conducting pillars (4) are attached to one side of multiple lithium batteries (2) along the direction of gravity. The connecting groove (7) is set horizontally and is used to connect the multiple heat-conducting pillars (4).

3. The case with a lithium battery overheat protection mechanism according to claim 1, characterized in that, The membrane (8) is horizontally arranged, and the membrane (8), the inner wall of the connecting groove (7) and the inner walls of the multiple heat-conducting columns (4) together form a sealed space.

4. The housing with a lithium battery overheat protection mechanism according to claim 1, characterized in that, The membrane (8) and the switch (9) are spaced apart.

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