An automatic cooling and alarm device for lithium battery pack

Abstract

The present application relates to a kind of lithium battery pack automatic cooling alarm device, including box and cover, box both sides are provided with first support, box middle part is provided with second support, first support and second support are provided with a plurality of groups for fixing the limiting component of battery cell, limiting component below is provided with detection component and the lifting assembly and cooling assembly driven under detection component, cooling assembly includes solvent tank and cooling pipeline, opening and closing component are provided on cooling pipeline, alarm component is provided on cover, lifting assembly is used to detect the lifting of battery cell after detection component detects excessive heat expansion, opening and closing component is used to connect cooling pipeline and the inside of box after battery cell expansion, cooling assembly is by extruding the solvent in solvent tank to the cooling pipeline and is sprayed to cool, extruding perfluorohexanone to the cooling pipeline and is sprayed, vaporization heat absorption is carried out, while battery cell is lifted and drives alarm to alarm.

Description

Technical Field

[0001] This invention relates to the field of energy storage battery equipment technology, and more specifically to an automatic cooling alarm device for a lithium battery pack. Background Technology

[0002] A lithium battery pack refers to a battery product formed by combining multiple individual battery cells in series and parallel to create a ready-to-use battery assembly. Chinese patent CN 218215433U discloses a lithium battery pack with a built-in temperature-sensing alarm, specifically relating to the field of lithium battery technology. It includes a lithium battery pack body and multiple battery cells installed within the pack. Each battery cell has a temperature sensor at its rear end that monitors its temperature in real time. The temperature sensor is embedded in the inner wall of the lithium battery pack body, and an alarm component is fixedly installed at one end of the pack body. External gas is drawn in by a suction component, and the gas flows through an air chamber and a first air box into the lithium battery pack body to dissipate heat from the battery cells. The heat is then discharged through a second air box, further improving heat dissipation. The temperature sensor monitors the battery cell temperature in real time, and when the temperature is detected to be too high, the alarm immediately sounds to notify personnel to investigate. This significantly improves the safety of the lithium battery pack. Furthermore, it uses airflow cooling, which is safer than water cooling and eliminates the risk of water leakage.

[0003] However, the inventors discovered that in actual use, when any cell in the battery pack becomes overheated and is damaged, it is impossible to quickly dissipate heat from that cell alone, which reduces the safety of the device. At the same time, it is impossible to quickly identify the overheating cell among multiple cells, which is time-consuming and laborious. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic cooling alarm device for lithium battery packs. The device automatically detects overheating and expansion of the battery cell through a detection component, which then lifts the cell and opens the plug, squeezing perfluorohexanone into the cooling pipe for vaporization and heat absorption, thereby achieving rapid cooling. Simultaneously, the lifting of the battery cell triggers an alarm.

[0005] The technical solution of the present invention is as follows:

[0006] An automatic cooling alarm device for a lithium battery pack includes a housing and a cover. First supports are provided on both sides of the housing, and a second support is provided in the middle of the housing. Several sets of limiting components for fixing the battery cells are provided between the first and second supports. Below the limiting components are a detection component and a lifting and cooling component driven by the detection component. The cooling component includes a solvent tank and a cooling pipe. An opening and closing component is provided on the cooling pipe. An alarm component is provided on the cover. The lifting component is used to lift the battery cell after the detection component detects excessive heating and expansion. The opening and closing component connects the cooling pipe to the inside of the housing after the battery cell expands. The cooling component cools the battery cell by squeezing solvent from the solvent tank and spraying it out through the cooling pipe.

[0007] As a preferred embodiment, the limiting assembly includes a partition plate fixedly disposed on the first bracket and the second bracket, and a limiting rod fixedly disposed on one side of the partition plate.

[0008] As a preferred embodiment, the detection assembly includes a cylinder fixedly disposed at the bottom of the housing, a first piston symmetrically slidably disposed within the cylinder, and a rectangular rod fixedly disposed on the first piston, wherein the cylinder is filled with carbon dioxide.

[0009] As a preferred embodiment, the lifting assembly includes a lifting rod slidably disposed at the bottom of the housing, a connecting rod fixedly disposed on the lifting rod, a slot formed on the rectangular rod, and an inclined surface fixedly disposed in the slot. The bottom of the connecting rod is spherical and cooperates with the inclined surface.

[0010] As a preferred embodiment, the opening and closing assembly includes a plurality of tapered holes formed on the first bracket and the second bracket, through holes formed on both sides of the tapered holes, a connecting hole formed between the tapered opening and the through holes, and a plug slidably disposed in the tapered holes, wherein the plug is configured with a tapered structure and cooperates with the connecting hole.

[0011] As a preferred embodiment, the cooling assembly further includes a second piston slidably disposed inside the solvent tank and a conical tube fixedly disposed on the cooling pipe. The solvent tank is fixedly disposed on both sides of the cylinder. The rectangular rod is fixedly connected to the second piston. The conical tube is connected to the conical hole. The solvent tank is provided with a heat insulation sleeve and the solvent inside the solvent tank is perfluorohexanone.

[0012] As a preferred embodiment, the alarm assembly includes several receiving cavities formed on the cover, limiting grooves formed on both sides of the receiving cavities, a slider slidably disposed in the limiting grooves, a top rod slidably disposed in the receiving cavities, a contact switch fixedly disposed in the receiving cavities, and an alarm fixedly disposed on the cover. The slider is fixedly connected to the top rod, and the several contact switches are electrically connected to the alarm. The top of the top rod is spherical and cooperates with the battery cell.

[0013] As a preferred embodiment, the enclosure is equipped with a cooling fan and cooling slots are provided on both sides of the enclosure.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. The present invention is equipped with a detection component and a lifting component. When the battery cell overheats, carbon dioxide expands, causing the battery cell to be lifted, reducing the time that staff spend searching for damaged battery cells and achieving the effect of automatically detecting damaged battery cells.

[0016] 2. The present invention is also provided with a cooling component and an alarm component. After the battery cell expands due to heat, the plug connects the conical hole and the housing. The second piston pushes the perfluorohexanone to flow out of the conical hole. The perfluorohexanone absorbs heat and vaporizes, thereby rapidly cooling the heated battery cell.

[0017] In summary, this invention has the advantages of good cooling effect and high efficiency, and is suitable for the field of energy storage battery equipment technology. Attached Figure Description

[0018] The invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 A schematic diagram of an automatic cooling alarm device for a lithium battery pack;

[0020] Figure 2 This is a schematic diagram of the limit component.

[0021] Figure 3 This is a schematic diagram of the alarm component.

[0022] Figure 4 A schematic diagram showing the state when the expansion of carbon dioxide causes the first piston to slide.

[0023] Figure 5 A schematic diagram showing the state when the lifting rod drives the battery cell to rise, causing the top rod to touch the contact switch;

[0024] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0025] Figure 7 for Figure 5 Enlarged view at point B in the middle;

[0026] Figure 8 This is a schematic diagram showing the state of the battery cell after the plug is removed and perfluorohexanone is used to cool the battery cell.

[0027] Figure 9 for Figure 8 Enlarged view at point C;

[0028] Reference numerals: 1. Box body, 2. Cover body, 3. First support, 4. Second support, 5. Battery cell, 6. Limiting assembly, 61. Partition plate, 62. Limiting rod, 7. Detection assembly, 71. Cylinder body, 72. First piston, 73. Rectangular rod, 8. Lifting assembly, 81. Lifting rod, 82. Connecting rod, 83. Empty slot, 84. Inclined surface, 9. Cooling assembly, 91. Solvent tank, 92. Cooling pipe, 93. Second piston, 94. Conical tube, 10. Opening and closing assembly, 101. Conical hole, 102. Through hole, 103. Connecting hole, 104. Plug, 11. Alarm assembly, 111. Receiving cavity, 112. Limiting groove, 113. Slider, 114. Top rod, 115. Contact switch, 116. Alarm, 12. Cooling fan, 13. Cooling slot. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figure 1 and Figure 9 As shown, an automatic cooling alarm device for a lithium battery pack includes a housing 1 and a cover 2. First supports 3 are provided on both sides of the housing 1, and a second support 4 is provided in the middle of the housing 1. Several sets of limiting components 6 for fixing the battery cells 5 are provided between the first supports 3 and the second supports 4. Below the limiting components 6, there are detection components 7, lifting components 8 driven by the detection components 7, and cooling components 9. The cooling components 9 include a solvent tank 91 and a cooling pipe 92. An opening and closing component 10 is provided on the cooling pipe 92, and an alarm component 11 is provided on the cover 2. The lifting component 8 is used to lift the battery cell 5 after the detection component 7 detects that it has overheated and expanded. The opening and closing component 10 is used to connect the cooling pipe 92 with the inside of the housing 1 after the battery cell 5 expands. The cooling components 9 cool the battery cell 5 by squeezing the solvent in the solvent tank 91 and spraying it out at the cooling pipe 92.

[0033] It is worth mentioning that, such as Figure 2 As shown, the limiting component 6 includes a partition 61 fixedly mounted on the first bracket 3 and the second bracket 4, and a limiting rod 62 fixedly mounted on one side of the partition 61. In use, the partition 61 creates a gap between the battery cells 5 while fixing them, and the limiting rod 62 limits the battery cells 5.

[0034] It needs to be emphasized that, such as Figure 4As shown, the detection component 7 includes a cylinder 71 fixedly installed at the bottom of the housing 1, a first piston 72 symmetrically slidably installed inside the cylinder 71, and a rectangular rod 73 fixedly installed on the first piston 72. The cylinder 71 is filled with carbon dioxide. During use, when the battery cell 5 is severely overheated, the heat is transferred to the cylinder 71, causing the carbon dioxide gas to expand and push the two first pistons 72 to the sides, driving the lifting component 8 and the cooling component 9 to work. This lifts the severely overheated battery cell 5 while rapidly cooling it to prevent overheating from causing a fire or other problems.

[0035] It should be further explained that, such as Figure 5 and Figure 6 As shown, the lifting assembly 8 includes a lifting rod 81 slidably disposed at the bottom of the housing 1, a connecting rod 82 fixedly disposed on the lifting rod 81, a slot 83 opened on the rectangular rod 73, and an inclined surface 84 fixedly disposed in the slot 83. The bottom of the connecting rod 82 is spherical and cooperates with the inclined surface 84. In use, when the first piston 72 and the rectangular rod 73 slide to both sides, the connecting rod 82 slides in the slot 83 and is lifted upward when it passes the inclined surface 84, which drives the battery cell 5 to rise, making it easier to quickly detect the overheating battery cell 5 later.

[0036] It is worth mentioning that, such as Figure 8 and Figure 9 As shown, the opening and closing assembly 10 includes several conical holes 101 formed on the first bracket 3 and the second bracket 4, through holes 102 formed on both sides of the conical holes 101, a connecting hole 103 formed between the conical holes 101 and the through holes 102, and a plug 104 slidably disposed in the conical holes 101. The plug 104 is configured with a conical structure and cooperates with the connecting hole 103. In use, when the heating element 5 expands due to heat, it will squeeze the plug 104. After the plug 104 slides, the conical holes 101, through holes 102, and connecting holes 103 are connected to the inside of the housing 1.

[0037] Furthermore, such as Figure 8 and Figure 9As shown, the cooling assembly 9 also includes a second piston 93 slidably disposed within the solvent tank 91 and a conical tube 94 fixedly disposed on the cooling pipe 92. The solvent tank 91 is fixedly disposed on both sides of the cylinder 71. The rectangular rod 73 is fixedly connected to the second piston 93, and the conical tube 94 is connected to the conical hole 101. The solvent tank 91 is provided with a heat insulation sleeve, and the solvent in the solvent tank 91 is perfluorohexanone. After the perfluorohexanone is injected into the solvent tank 91, it remains liquid under the action of the heat insulation sleeve. During use, when the plug 1... After being squeezed by the battery cell 5, 04 slides into the conical tube 94. At this time, the conical tube 94 is connected to the conical hole 101. When the first piston 72 and the rectangular rod 73 slide, they drive the second piston 93 to squeeze the perfluorohexanone. The perfluorohexanone flows rapidly from the cooling pipe 92 into the conical tube 94, and then flows from the conical tube 94 into the conical hole 101 and the through hole 102. Since the temperature of the heating battery cell 5 is higher than the boiling point of perfluorohexanone, the perfluorohexanone absorbs heat and vaporizes rapidly when it flows out, which makes the battery cell 5 cool down rapidly and achieve a cooling effect.

[0038] In addition, such as Figure 5 and Figure 7 As shown, the alarm assembly 11 includes several receiving cavities 111 formed on the cover 2, limiting grooves 112 formed on both sides of the receiving cavities 111, a slider 113 slidably disposed in the limiting grooves 112, a top rod 114 slidably disposed in the receiving cavities 111, a contact switch 115 fixedly disposed in the receiving cavities 111, and an alarm 116 fixedly disposed on the cover 2. The slider 113 is fixedly connected to the top rod 114, and the several contact switches 115 are electrically connected to the alarm 116. The top of the top rod 114 is spherical and cooperates with the battery cell 5. In use, when the battery cell 5 is lifted, it drives the top rod 114 to slide until it touches the contact switch 115. The contact switch 115 sends an electrical signal to the alarm 116 to sound an alarm, notifying the staff to check, which greatly improves the safety of the equipment.

[0039] Furthermore, such as Figure 4 As shown, a heat insulation sleeve is provided on the solvent tank 91 and the solvent in the solvent tank 91 is perfluorohexanone. The heat insulation sleeve keeps the perfluorohexanone in the solvent tank 91 in a liquid state. When the perfluorohexanone is sprayed out from the conical hole 101 and the through hole 102, it will absorb heat and vaporize, thereby cooling the battery cell 5.

[0040] Furthermore, such as Figure 2 As shown, the box 1 is equipped with a cooling fan 12 and has heat dissipation slots 13 on both sides. The cooling fan 12 blows out the gas inside the box 1 and the heat dissipation slots 13 bring in cold air from the outside to cool the inside of the box 1.

[0041] Work process

[0042] When the battery cell 5 overheats, the heat is transferred to the cylinder 71, causing the carbon dioxide gas to expand and push the two first pistons 72 to the sides. This causes the connecting rod 82 to slide within the slot 83, and as it passes the inclined surface 84, it lifts upwards, raising the battery cell 5 and causing the push rod 114 to slide until it touches the contact switch 115. The contact switch 115 then sends an electrical signal to the alarm 116, notifying personnel to inspect the equipment. This significantly improves equipment safety, and simultaneously, the heated battery cell 5 expands due to heat. Then, the plug 104 will be squeezed and slid into the conical tube 94. At this time, the conical tube 94 is connected to the conical hole 101. When the first piston 72 and the rectangular rod 73 slide, they drive the second piston 93 to squeeze the perfluorohexanone. The perfluorohexanone flows quickly from the cooling pipe 92 into the conical tube 94, and from the conical tube 94 into the conical hole 101 and the through hole 102. Since the temperature of the heating cell 5 is higher than the boiling point of perfluorohexanone, the perfluorohexanone absorbs heat and vaporizes rapidly when it flows out, so that the cell 5 is cooled down quickly to achieve the cooling effect.

[0043] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0044] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0045] The above description, in conjunction with the accompanying drawings, is merely a preferred embodiment of the present invention. However, the present invention is not limited to the above-described embodiments. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the present invention.

Claims

1. A lithium battery pack automatic cooling alarm device, comprising a box body (1) and a cover body (2), characterized in that: The box (1) is provided with first brackets (3) on both sides, and a second bracket (4) is provided in the middle of the box (1). Several sets of limiting components (6) for fixing the battery cell (5) are provided between the first bracket (3) and the second bracket (4). A detection component (7) and a lifting component (8) and a cooling component (9) driven by the detection component (7) are provided below the limiting component (6). The detection component (7) includes a cylinder (71) fixedly installed at the bottom of the box (1), a first piston (72) symmetrically slidably installed in the cylinder (71), and a rectangular rod (73) fixedly installed on the first piston (72). The cylinder (71) is filled with carbon dioxide. The lifting component (8) includes a lifting rod (81) slidably installed at the bottom of the box (1) and a rectangular rod (73) fixedly installed on the lifting rod (81). 1) The connecting rod (82) on the rectangular rod (73), the slot (83) on the rectangular rod (73), and the inclined surface (84) fixedly set in the slot (83) are provided. The bottom of the connecting rod (82) is spherical and matches the inclined surface (84). The cooling component (9) includes a solvent tank (91) and a cooling pipe (92). The cooling pipe (92) is provided with an opening and closing component (10). The cover (2) is provided with an alarm component (11). The lifting component (8) is used to detect the battery cell (5) after it is overheated and expands, and then drive it to be lifted. The opening and closing component (10) is used to connect the cooling pipe (92) and the inside of the box (1) after the battery cell (5) expands. The cooling component (9) cools down by squeezing the solvent in the solvent tank (91) to the cooling pipe (92) for spraying out.

2. The automatic cooling and alarm device for lithium battery pack according to claim 1, characterized in that: The limiting component (6) includes a partition (61) fixedly mounted on the first bracket (3) and the second bracket (4) and a limiting rod (62) fixedly mounted on one side of the partition (61).

3. The automatic cooling and alarm device for lithium battery pack according to claim 1, characterized in that: The opening and closing assembly (10) includes a plurality of tapered holes (101) on the first bracket (3) and the second bracket (4), through holes (102) on both sides of the tapered holes (101), a connecting hole (103) between the tapered holes (101) and the through holes (102), and a plug (104) slidably disposed in the tapered holes (101). The plug (104) is configured as a tapered structure and cooperates with the connecting hole (103).

4. The automatic cooling and alarm device for lithium battery pack according to claim 3, characterized in that: The cooling assembly (9) further includes a second piston (93) slidably disposed in the solvent tank (91) and a conical tube (94) fixedly disposed on the cooling pipe (92). The solvent tank (91) is fixedly disposed on both sides of the cylinder (71). The rectangular rod (73) is fixedly connected to the second piston (93). The conical tube (94) is connected to the conical hole (101). The solvent tank (91) is provided with a heat insulation sleeve and the solvent in the solvent tank (91) is perfluorohexanone.

5. The automatic cooling and alarm device for lithium battery pack according to claim 1, characterized in that: The alarm assembly (11) includes several receiving cavities (111) opened on the cover (2), limiting grooves (112) opened on both sides of the receiving cavities (111), a slider (113) slidably disposed in the limiting grooves (112), a top rod (114) slidably disposed in the receiving cavities (111), a contact switch (115) fixedly disposed in the receiving cavities (111), and an alarm (116) fixedly disposed on the cover (2). The slider (113) is fixedly connected to the top rod (114), and several contact switches (115) are electrically connected to the alarm (116). The top of the top rod (114) is spherical and cooperates with the battery cell (5).

6. The lithium battery pack automatic cooling alarm device according to claim 1, characterized in that: The box (1) is equipped with a cooling fan (12) and cooling slots (13) are provided on both sides of the box (1).

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